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af1a8899 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 4 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
5 | |
6 | completely rewritten, based on the MD driver code from Marc Zyngier | |
7 | ||
8 | Changes: | |
9 | ||
10 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
11 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
12 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
13 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
14 | - kmod support by: Cyrus Durgin | |
15 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
16 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
17 | ||
18 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
19 | RAID code (such as request based resynchronization): | |
20 | ||
21 | Neil Brown <neilb@cse.unsw.edu.au>. | |
22 | ||
32a7627c N |
23 | - persistent bitmap code |
24 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
25 | ||
9d48739e N |
26 | |
27 | Errors, Warnings, etc. | |
28 | Please use: | |
29 | pr_crit() for error conditions that risk data loss | |
30 | pr_err() for error conditions that are unexpected, like an IO error | |
31 | or internal inconsistency | |
32 | pr_warn() for error conditions that could have been predicated, like | |
33 | adding a device to an array when it has incompatible metadata | |
34 | pr_info() for every interesting, very rare events, like an array starting | |
35 | or stopping, or resync starting or stopping | |
36 | pr_debug() for everything else. | |
37 | ||
1da177e4 LT |
38 | */ |
39 | ||
963c555e | 40 | #include <linux/sched/mm.h> |
3f07c014 | 41 | #include <linux/sched/signal.h> |
a6fb0934 | 42 | #include <linux/kthread.h> |
bff61975 | 43 | #include <linux/blkdev.h> |
fc974ee2 | 44 | #include <linux/badblocks.h> |
1da177e4 | 45 | #include <linux/sysctl.h> |
bff61975 | 46 | #include <linux/seq_file.h> |
ff01bb48 | 47 | #include <linux/fs.h> |
d7603b7e | 48 | #include <linux/poll.h> |
16f17b39 | 49 | #include <linux/ctype.h> |
e7d2860b | 50 | #include <linux/string.h> |
fb4d8c76 N |
51 | #include <linux/hdreg.h> |
52 | #include <linux/proc_fs.h> | |
53 | #include <linux/random.h> | |
056075c7 | 54 | #include <linux/module.h> |
fb4d8c76 | 55 | #include <linux/reboot.h> |
32a7627c | 56 | #include <linux/file.h> |
aa98aa31 | 57 | #include <linux/compat.h> |
25570727 | 58 | #include <linux/delay.h> |
bff61975 N |
59 | #include <linux/raid/md_p.h> |
60 | #include <linux/raid/md_u.h> | |
5a0e3ad6 | 61 | #include <linux/slab.h> |
4ad23a97 N |
62 | #include <linux/percpu-refcount.h> |
63 | ||
504634f6 | 64 | #include <trace/events/block.h> |
43b2e5d8 | 65 | #include "md.h" |
935fe098 | 66 | #include "md-bitmap.h" |
edb39c9d | 67 | #include "md-cluster.h" |
1da177e4 | 68 | |
1da177e4 | 69 | #ifndef MODULE |
d710e138 | 70 | static void autostart_arrays(int part); |
1da177e4 LT |
71 | #endif |
72 | ||
01f96c0a N |
73 | /* pers_list is a list of registered personalities protected |
74 | * by pers_lock. | |
75 | * pers_lock does extra service to protect accesses to | |
76 | * mddev->thread when the mutex cannot be held. | |
77 | */ | |
2604b703 | 78 | static LIST_HEAD(pers_list); |
1da177e4 LT |
79 | static DEFINE_SPINLOCK(pers_lock); |
80 | ||
28dec870 KO |
81 | static struct kobj_type md_ktype; |
82 | ||
edb39c9d | 83 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 84 | EXPORT_SYMBOL(md_cluster_ops); |
2b598ee5 | 85 | static struct module *md_cluster_mod; |
edb39c9d | 86 | |
90b08710 | 87 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
88 | static struct workqueue_struct *md_wq; |
89 | static struct workqueue_struct *md_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 | |
1da177e4 LT |
101 | /* |
102 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
103 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
104 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 105 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
106 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
107 | * speed limit - in case reconstruction slows down your system despite | |
108 | * idle IO detection. | |
109 | * | |
110 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 111 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
112 | */ |
113 | ||
114 | static int sysctl_speed_limit_min = 1000; | |
115 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 116 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
117 | { |
118 | return mddev->sync_speed_min ? | |
119 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
120 | } | |
121 | ||
fd01b88c | 122 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
123 | { |
124 | return mddev->sync_speed_max ? | |
125 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
126 | } | |
1da177e4 | 127 | |
404659cf | 128 | static int rdev_init_serial(struct md_rdev *rdev) |
3e148a32 GJ |
129 | { |
130 | if (rdev->bdev->bd_queue->nr_hw_queues == 1) | |
131 | return 0; | |
132 | ||
404659cf GJ |
133 | spin_lock_init(&rdev->serial_list_lock); |
134 | INIT_LIST_HEAD(&rdev->serial_list); | |
135 | init_waitqueue_head(&rdev->serial_io_wait); | |
136 | set_bit(CollisionCheck, &rdev->flags); | |
3e148a32 GJ |
137 | |
138 | return 1; | |
139 | } | |
140 | ||
963c555e | 141 | /* |
404659cf | 142 | * Create serial_info_pool if rdev is the first multi-queue device flaged |
963c555e GJ |
143 | * with writemostly, also write-behind mode is enabled. |
144 | */ | |
404659cf | 145 | void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev, |
963c555e GJ |
146 | bool is_suspend) |
147 | { | |
148 | if (mddev->bitmap_info.max_write_behind == 0) | |
149 | return; | |
150 | ||
404659cf | 151 | if (!test_bit(WriteMostly, &rdev->flags) || !rdev_init_serial(rdev)) |
963c555e GJ |
152 | return; |
153 | ||
404659cf | 154 | if (mddev->serial_info_pool == NULL) { |
963c555e GJ |
155 | unsigned int noio_flag; |
156 | ||
157 | if (!is_suspend) | |
158 | mddev_suspend(mddev); | |
159 | noio_flag = memalloc_noio_save(); | |
404659cf GJ |
160 | mddev->serial_info_pool = |
161 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
162 | sizeof(struct serial_info)); | |
963c555e | 163 | memalloc_noio_restore(noio_flag); |
404659cf GJ |
164 | if (!mddev->serial_info_pool) |
165 | pr_err("can't alloc memory pool for serialization\n"); | |
963c555e GJ |
166 | if (!is_suspend) |
167 | mddev_resume(mddev); | |
168 | } | |
169 | } | |
404659cf | 170 | EXPORT_SYMBOL_GPL(mddev_create_serial_pool); |
963c555e GJ |
171 | |
172 | /* | |
404659cf GJ |
173 | * Destroy serial_info_pool if rdev is the last device flaged with |
174 | * CollisionCheck. | |
963c555e | 175 | */ |
404659cf | 176 | static void mddev_destroy_serial_pool(struct mddev *mddev, struct md_rdev *rdev) |
963c555e | 177 | { |
404659cf | 178 | if (!test_and_clear_bit(CollisionCheck, &rdev->flags)) |
963c555e GJ |
179 | return; |
180 | ||
404659cf | 181 | if (mddev->serial_info_pool) { |
963c555e GJ |
182 | struct md_rdev *temp; |
183 | int num = 0; | |
184 | ||
185 | /* | |
404659cf | 186 | * Check if other rdevs need serial_info_pool. |
963c555e GJ |
187 | */ |
188 | rdev_for_each(temp, mddev) | |
189 | if (temp != rdev && | |
404659cf | 190 | test_bit(CollisionCheck, &temp->flags)) |
963c555e GJ |
191 | num++; |
192 | if (!num) { | |
193 | mddev_suspend(rdev->mddev); | |
404659cf GJ |
194 | mempool_destroy(mddev->serial_info_pool); |
195 | mddev->serial_info_pool = NULL; | |
963c555e GJ |
196 | mddev_resume(rdev->mddev); |
197 | } | |
198 | } | |
199 | } | |
200 | ||
1da177e4 LT |
201 | static struct ctl_table_header *raid_table_header; |
202 | ||
82592c38 | 203 | static struct ctl_table raid_table[] = { |
1da177e4 | 204 | { |
1da177e4 LT |
205 | .procname = "speed_limit_min", |
206 | .data = &sysctl_speed_limit_min, | |
207 | .maxlen = sizeof(int), | |
80ca3a44 | 208 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 209 | .proc_handler = proc_dointvec, |
1da177e4 LT |
210 | }, |
211 | { | |
1da177e4 LT |
212 | .procname = "speed_limit_max", |
213 | .data = &sysctl_speed_limit_max, | |
214 | .maxlen = sizeof(int), | |
80ca3a44 | 215 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 216 | .proc_handler = proc_dointvec, |
1da177e4 | 217 | }, |
894d2491 | 218 | { } |
1da177e4 LT |
219 | }; |
220 | ||
82592c38 | 221 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 222 | { |
1da177e4 LT |
223 | .procname = "raid", |
224 | .maxlen = 0, | |
80ca3a44 | 225 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
226 | .child = raid_table, |
227 | }, | |
894d2491 | 228 | { } |
1da177e4 LT |
229 | }; |
230 | ||
82592c38 | 231 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 232 | { |
1da177e4 LT |
233 | .procname = "dev", |
234 | .maxlen = 0, | |
235 | .mode = 0555, | |
236 | .child = raid_dir_table, | |
237 | }, | |
894d2491 | 238 | { } |
1da177e4 LT |
239 | }; |
240 | ||
83d5cde4 | 241 | static const struct block_device_operations md_fops; |
1da177e4 | 242 | |
f91de92e N |
243 | static int start_readonly; |
244 | ||
78b6350d N |
245 | /* |
246 | * The original mechanism for creating an md device is to create | |
247 | * a device node in /dev and to open it. This causes races with device-close. | |
248 | * The preferred method is to write to the "new_array" module parameter. | |
249 | * This can avoid races. | |
250 | * Setting create_on_open to false disables the original mechanism | |
251 | * so all the races disappear. | |
252 | */ | |
253 | static bool create_on_open = true; | |
254 | ||
a167f663 | 255 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 256 | struct mddev *mddev) |
a167f663 | 257 | { |
afeee514 | 258 | if (!mddev || !bioset_initialized(&mddev->bio_set)) |
a167f663 N |
259 | return bio_alloc(gfp_mask, nr_iovecs); |
260 | ||
6251691a | 261 | return bio_alloc_bioset(gfp_mask, nr_iovecs, &mddev->bio_set); |
a167f663 N |
262 | } |
263 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
264 | ||
5a85071c N |
265 | static struct bio *md_bio_alloc_sync(struct mddev *mddev) |
266 | { | |
afeee514 | 267 | if (!mddev || !bioset_initialized(&mddev->sync_set)) |
5a85071c N |
268 | return bio_alloc(GFP_NOIO, 1); |
269 | ||
afeee514 | 270 | return bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
5a85071c N |
271 | } |
272 | ||
d7603b7e N |
273 | /* |
274 | * We have a system wide 'event count' that is incremented | |
275 | * on any 'interesting' event, and readers of /proc/mdstat | |
276 | * can use 'poll' or 'select' to find out when the event | |
277 | * count increases. | |
278 | * | |
279 | * Events are: | |
280 | * start array, stop array, error, add device, remove device, | |
281 | * start build, activate spare | |
282 | */ | |
2989ddbd | 283 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 284 | static atomic_t md_event_count; |
fd01b88c | 285 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
286 | { |
287 | atomic_inc(&md_event_count); | |
288 | wake_up(&md_event_waiters); | |
289 | } | |
29269553 | 290 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 291 | |
1da177e4 LT |
292 | /* |
293 | * Enables to iterate over all existing md arrays | |
294 | * all_mddevs_lock protects this list. | |
295 | */ | |
296 | static LIST_HEAD(all_mddevs); | |
297 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
298 | ||
1da177e4 LT |
299 | /* |
300 | * iterates through all used mddevs in the system. | |
301 | * We take care to grab the all_mddevs_lock whenever navigating | |
302 | * the list, and to always hold a refcount when unlocked. | |
303 | * Any code which breaks out of this loop while own | |
304 | * a reference to the current mddev and must mddev_put it. | |
305 | */ | |
fd01b88c | 306 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 307 | \ |
f72ffdd6 | 308 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
309 | _tmp = all_mddevs.next; \ |
310 | _mddev = NULL;}); \ | |
311 | ({ if (_tmp != &all_mddevs) \ | |
312 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 313 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
314 | if (_mddev) mddev_put(_mddev); \ |
315 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
316 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 317 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 318 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
319 | ) |
320 | ||
409c57f3 N |
321 | /* Rather than calling directly into the personality make_request function, |
322 | * IO requests come here first so that we can check if the device is | |
323 | * being suspended pending a reconfiguration. | |
324 | * We hold a refcount over the call to ->make_request. By the time that | |
325 | * call has finished, the bio has been linked into some internal structure | |
326 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
327 | */ | |
b3143b9a N |
328 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
329 | { | |
330 | if (mddev->suspended) | |
331 | return true; | |
332 | if (bio_data_dir(bio) != WRITE) | |
333 | return false; | |
334 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
335 | return false; | |
336 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
337 | return false; | |
338 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
339 | return false; | |
340 | return true; | |
341 | } | |
342 | ||
393debc2 SL |
343 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
344 | { | |
345 | check_suspended: | |
346 | rcu_read_lock(); | |
b3143b9a | 347 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
348 | DEFINE_WAIT(__wait); |
349 | for (;;) { | |
350 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
351 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 352 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
353 | break; |
354 | rcu_read_unlock(); | |
355 | schedule(); | |
356 | rcu_read_lock(); | |
357 | } | |
358 | finish_wait(&mddev->sb_wait, &__wait); | |
359 | } | |
360 | atomic_inc(&mddev->active_io); | |
361 | rcu_read_unlock(); | |
362 | ||
363 | if (!mddev->pers->make_request(mddev, bio)) { | |
364 | atomic_dec(&mddev->active_io); | |
365 | wake_up(&mddev->sb_wait); | |
366 | goto check_suspended; | |
367 | } | |
368 | ||
369 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
370 | wake_up(&mddev->sb_wait); | |
371 | } | |
372 | EXPORT_SYMBOL(md_handle_request); | |
373 | ||
dece1635 | 374 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 375 | { |
49077326 | 376 | const int rw = bio_data_dir(bio); |
ddcf35d3 | 377 | const int sgrp = op_stat_group(bio_op(bio)); |
fd01b88c | 378 | struct mddev *mddev = q->queuedata; |
e91ece55 | 379 | unsigned int sectors; |
49077326 | 380 | |
62f7b198 GP |
381 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
382 | bio_io_error(bio); | |
383 | return BLK_QC_T_NONE; | |
384 | } | |
385 | ||
af67c31f | 386 | blk_queue_split(q, &bio); |
54efd50b | 387 | |
274d8cbd | 388 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 389 | bio_io_error(bio); |
dece1635 | 390 | return BLK_QC_T_NONE; |
409c57f3 | 391 | } |
bbfa57c0 | 392 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 393 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 394 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 395 | bio_endio(bio); |
dece1635 | 396 | return BLK_QC_T_NONE; |
bbfa57c0 | 397 | } |
49077326 | 398 | |
e91ece55 CM |
399 | /* |
400 | * save the sectors now since our bio can | |
401 | * go away inside make_request | |
402 | */ | |
403 | sectors = bio_sectors(bio); | |
9c573de3 | 404 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 405 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
406 | |
407 | md_handle_request(mddev, bio); | |
49077326 | 408 | |
112f158f MS |
409 | part_stat_lock(); |
410 | part_stat_inc(&mddev->gendisk->part0, ios[sgrp]); | |
411 | part_stat_add(&mddev->gendisk->part0, sectors[sgrp], sectors); | |
74672d06 | 412 | part_stat_unlock(); |
49077326 | 413 | |
dece1635 | 414 | return BLK_QC_T_NONE; |
409c57f3 N |
415 | } |
416 | ||
9e35b99c N |
417 | /* mddev_suspend makes sure no new requests are submitted |
418 | * to the device, and that any requests that have been submitted | |
419 | * are completely handled. | |
afa0f557 N |
420 | * Once mddev_detach() is called and completes, the module will be |
421 | * completely unused. | |
9e35b99c | 422 | */ |
fd01b88c | 423 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 424 | { |
092398dc | 425 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 426 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
427 | if (mddev->suspended++) |
428 | return; | |
409c57f3 | 429 | synchronize_rcu(); |
cc27b0c7 | 430 | wake_up(&mddev->sb_wait); |
35bfc521 N |
431 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
432 | smp_mb__after_atomic(); | |
409c57f3 N |
433 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
434 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
435 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
436 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
437 | |
438 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 439 | } |
390ee602 | 440 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 441 | |
fd01b88c | 442 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 443 | { |
4d5324f7 | 444 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
445 | if (--mddev->suspended) |
446 | return; | |
409c57f3 N |
447 | wake_up(&mddev->sb_wait); |
448 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 449 | |
47525e59 | 450 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
451 | md_wakeup_thread(mddev->thread); |
452 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 453 | } |
390ee602 | 454 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 455 | |
fd01b88c | 456 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 457 | { |
5c675f83 N |
458 | struct md_personality *pers = mddev->pers; |
459 | int ret = 0; | |
460 | ||
461 | rcu_read_lock(); | |
462 | if (mddev->suspended) | |
463 | ret = 1; | |
464 | else if (pers && pers->congested) | |
465 | ret = pers->congested(mddev, bits); | |
466 | rcu_read_unlock(); | |
467 | return ret; | |
468 | } | |
469 | EXPORT_SYMBOL_GPL(mddev_congested); | |
470 | static int md_congested(void *data, int bits) | |
471 | { | |
472 | struct mddev *mddev = data; | |
473 | return mddev_congested(mddev, bits); | |
3fa841d7 | 474 | } |
3fa841d7 | 475 | |
a2826aa9 | 476 | /* |
e9c7469b | 477 | * Generic flush handling for md |
a2826aa9 N |
478 | */ |
479 | ||
4bc034d3 | 480 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 481 | { |
4bc034d3 N |
482 | struct md_rdev *rdev = bio->bi_private; |
483 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
484 | |
485 | rdev_dec_pending(rdev, mddev); | |
486 | ||
4bc034d3 N |
487 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
488 | /* The pre-request flush has finished */ | |
489 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 490 | } |
4bc034d3 | 491 | bio_put(bio); |
5a409b4f | 492 | } |
a7a07e69 | 493 | |
4bc034d3 N |
494 | static void md_submit_flush_data(struct work_struct *ws); |
495 | ||
496 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 497 | { |
4bc034d3 | 498 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 499 | struct md_rdev *rdev; |
a2826aa9 | 500 | |
2bc13b83 | 501 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
502 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
503 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 504 | rcu_read_lock(); |
dafb20fa | 505 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
506 | if (rdev->raid_disk >= 0 && |
507 | !test_bit(Faulty, &rdev->flags)) { | |
508 | /* Take two references, one is dropped | |
509 | * when request finishes, one after | |
510 | * we reclaim rcu_read_lock | |
511 | */ | |
512 | struct bio *bi; | |
513 | atomic_inc(&rdev->nr_pending); | |
514 | atomic_inc(&rdev->nr_pending); | |
515 | rcu_read_unlock(); | |
b5e1b8ce | 516 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
5a409b4f | 517 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
518 | bi->bi_private = rdev; |
519 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 520 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 521 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 522 | submit_bio(bi); |
a2826aa9 N |
523 | rcu_read_lock(); |
524 | rdev_dec_pending(rdev, mddev); | |
525 | } | |
526 | rcu_read_unlock(); | |
4bc034d3 N |
527 | if (atomic_dec_and_test(&mddev->flush_pending)) |
528 | queue_work(md_wq, &mddev->flush_work); | |
529 | } | |
a2826aa9 | 530 | |
4bc034d3 N |
531 | static void md_submit_flush_data(struct work_struct *ws) |
532 | { | |
533 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
534 | struct bio *bio = mddev->flush_bio; | |
535 | ||
536 | /* | |
537 | * must reset flush_bio before calling into md_handle_request to avoid a | |
538 | * deadlock, because other bios passed md_handle_request suspend check | |
539 | * could wait for this and below md_handle_request could wait for those | |
540 | * bios because of suspend check | |
541 | */ | |
2bc13b83 | 542 | mddev->last_flush = mddev->start_flush; |
4bc034d3 N |
543 | mddev->flush_bio = NULL; |
544 | wake_up(&mddev->sb_wait); | |
545 | ||
546 | if (bio->bi_iter.bi_size == 0) { | |
547 | /* an empty barrier - all done */ | |
548 | bio_endio(bio); | |
549 | } else { | |
550 | bio->bi_opf &= ~REQ_PREFLUSH; | |
551 | md_handle_request(mddev, bio); | |
a2826aa9 | 552 | } |
a2826aa9 | 553 | } |
4bc034d3 | 554 | |
775d7831 DJ |
555 | /* |
556 | * Manages consolidation of flushes and submitting any flushes needed for | |
557 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
558 | * being finished in another context. Returns false if the flushing is | |
559 | * complete but still needs the I/O portion of the bio to be processed. | |
560 | */ | |
561 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 562 | { |
2bc13b83 | 563 | ktime_t start = ktime_get_boottime(); |
4bc034d3 N |
564 | spin_lock_irq(&mddev->lock); |
565 | wait_event_lock_irq(mddev->sb_wait, | |
2bc13b83 N |
566 | !mddev->flush_bio || |
567 | ktime_after(mddev->last_flush, start), | |
4bc034d3 | 568 | mddev->lock); |
2bc13b83 N |
569 | if (!ktime_after(mddev->last_flush, start)) { |
570 | WARN_ON(mddev->flush_bio); | |
571 | mddev->flush_bio = bio; | |
572 | bio = NULL; | |
573 | } | |
4bc034d3 N |
574 | spin_unlock_irq(&mddev->lock); |
575 | ||
2bc13b83 N |
576 | if (!bio) { |
577 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
578 | queue_work(md_wq, &mddev->flush_work); | |
579 | } else { | |
580 | /* flush was performed for some other bio while we waited. */ | |
581 | if (bio->bi_iter.bi_size == 0) | |
582 | /* an empty barrier - all done */ | |
583 | bio_endio(bio); | |
584 | else { | |
585 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 586 | return false; |
2bc13b83 N |
587 | } |
588 | } | |
775d7831 | 589 | return true; |
4bc034d3 | 590 | } |
e9c7469b | 591 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 592 | |
fd01b88c | 593 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
594 | { |
595 | atomic_inc(&mddev->active); | |
596 | return mddev; | |
597 | } | |
598 | ||
5fd3a17e | 599 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 600 | |
fd01b88c | 601 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
602 | { |
603 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
604 | return; | |
d3374825 | 605 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
606 | mddev->ctime == 0 && !mddev->hold_active) { |
607 | /* Array is not configured at all, and not held active, | |
608 | * so destroy it */ | |
af8a2434 | 609 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
610 | |
611 | /* | |
612 | * Call queue_work inside the spinlock so that | |
613 | * flush_workqueue() after mddev_find will succeed in waiting | |
614 | * for the work to be done. | |
615 | */ | |
616 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
617 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
618 | } |
619 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
620 | } |
621 | ||
8376d3c1 | 622 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 623 | |
fd01b88c | 624 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 625 | { |
28dec870 | 626 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
627 | mutex_init(&mddev->open_mutex); |
628 | mutex_init(&mddev->reconfig_mutex); | |
629 | mutex_init(&mddev->bitmap_info.mutex); | |
630 | INIT_LIST_HEAD(&mddev->disks); | |
631 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 632 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
633 | atomic_set(&mddev->active, 1); |
634 | atomic_set(&mddev->openers, 0); | |
635 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 636 | spin_lock_init(&mddev->lock); |
4bc034d3 | 637 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
638 | init_waitqueue_head(&mddev->sb_wait); |
639 | init_waitqueue_head(&mddev->recovery_wait); | |
640 | mddev->reshape_position = MaxSector; | |
2c810cdd | 641 | mddev->reshape_backwards = 0; |
c4a39551 | 642 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
643 | mddev->resync_min = 0; |
644 | mddev->resync_max = MaxSector; | |
645 | mddev->level = LEVEL_NONE; | |
646 | } | |
390ee602 | 647 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 648 | |
f72ffdd6 | 649 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 650 | { |
fd01b88c | 651 | struct mddev *mddev, *new = NULL; |
1da177e4 | 652 | |
8f5f02c4 N |
653 | if (unit && MAJOR(unit) != MD_MAJOR) |
654 | unit &= ~((1<<MdpMinorShift)-1); | |
655 | ||
1da177e4 LT |
656 | retry: |
657 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
658 | |
659 | if (unit) { | |
660 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
661 | if (mddev->unit == unit) { | |
662 | mddev_get(mddev); | |
663 | spin_unlock(&all_mddevs_lock); | |
664 | kfree(new); | |
665 | return mddev; | |
666 | } | |
667 | ||
668 | if (new) { | |
669 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 670 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
671 | new->hold_active = UNTIL_IOCTL; |
672 | return new; | |
1da177e4 | 673 | } |
efeb53c0 N |
674 | } else if (new) { |
675 | /* find an unused unit number */ | |
676 | static int next_minor = 512; | |
677 | int start = next_minor; | |
678 | int is_free = 0; | |
679 | int dev = 0; | |
680 | while (!is_free) { | |
681 | dev = MKDEV(MD_MAJOR, next_minor); | |
682 | next_minor++; | |
683 | if (next_minor > MINORMASK) | |
684 | next_minor = 0; | |
685 | if (next_minor == start) { | |
686 | /* Oh dear, all in use. */ | |
687 | spin_unlock(&all_mddevs_lock); | |
688 | kfree(new); | |
689 | return NULL; | |
690 | } | |
f72ffdd6 | 691 | |
efeb53c0 N |
692 | is_free = 1; |
693 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
694 | if (mddev->unit == dev) { | |
695 | is_free = 0; | |
696 | break; | |
697 | } | |
698 | } | |
699 | new->unit = dev; | |
700 | new->md_minor = MINOR(dev); | |
701 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
702 | list_add(&new->all_mddevs, &all_mddevs); |
703 | spin_unlock(&all_mddevs_lock); | |
704 | return new; | |
705 | } | |
706 | spin_unlock(&all_mddevs_lock); | |
707 | ||
9ffae0cf | 708 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
709 | if (!new) |
710 | return NULL; | |
711 | ||
1da177e4 LT |
712 | new->unit = unit; |
713 | if (MAJOR(unit) == MD_MAJOR) | |
714 | new->md_minor = MINOR(unit); | |
715 | else | |
716 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
717 | ||
fafd7fb0 | 718 | mddev_init(new); |
1da177e4 | 719 | |
1da177e4 LT |
720 | goto retry; |
721 | } | |
722 | ||
b6eb127d N |
723 | static struct attribute_group md_redundancy_group; |
724 | ||
5c47daf6 | 725 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 726 | { |
a64c876f | 727 | if (mddev->to_remove) { |
b6eb127d N |
728 | /* These cannot be removed under reconfig_mutex as |
729 | * an access to the files will try to take reconfig_mutex | |
730 | * while holding the file unremovable, which leads to | |
731 | * a deadlock. | |
bb4f1e9d N |
732 | * So hold set sysfs_active while the remove in happeing, |
733 | * and anything else which might set ->to_remove or my | |
734 | * otherwise change the sysfs namespace will fail with | |
735 | * -EBUSY if sysfs_active is still set. | |
736 | * We set sysfs_active under reconfig_mutex and elsewhere | |
737 | * test it under the same mutex to ensure its correct value | |
738 | * is seen. | |
b6eb127d | 739 | */ |
a64c876f N |
740 | struct attribute_group *to_remove = mddev->to_remove; |
741 | mddev->to_remove = NULL; | |
bb4f1e9d | 742 | mddev->sysfs_active = 1; |
b6eb127d N |
743 | mutex_unlock(&mddev->reconfig_mutex); |
744 | ||
00bcb4ac N |
745 | if (mddev->kobj.sd) { |
746 | if (to_remove != &md_redundancy_group) | |
747 | sysfs_remove_group(&mddev->kobj, to_remove); | |
748 | if (mddev->pers == NULL || | |
749 | mddev->pers->sync_request == NULL) { | |
750 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
751 | if (mddev->sysfs_action) | |
752 | sysfs_put(mddev->sysfs_action); | |
753 | mddev->sysfs_action = NULL; | |
754 | } | |
a64c876f | 755 | } |
bb4f1e9d | 756 | mddev->sysfs_active = 0; |
b6eb127d N |
757 | } else |
758 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 759 | |
751e67ca CD |
760 | /* As we've dropped the mutex we need a spinlock to |
761 | * make sure the thread doesn't disappear | |
01f96c0a N |
762 | */ |
763 | spin_lock(&pers_lock); | |
005eca5e | 764 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 765 | wake_up(&mddev->sb_wait); |
01f96c0a | 766 | spin_unlock(&pers_lock); |
1da177e4 | 767 | } |
5c47daf6 | 768 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 769 | |
57d051dc | 770 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
771 | { |
772 | struct md_rdev *rdev; | |
773 | ||
774 | rdev_for_each_rcu(rdev, mddev) | |
775 | if (rdev->desc_nr == nr) | |
776 | return rdev; | |
777 | ||
778 | return NULL; | |
779 | } | |
57d051dc | 780 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
781 | |
782 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 783 | { |
3cb03002 | 784 | struct md_rdev *rdev; |
1da177e4 | 785 | |
dafb20fa | 786 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
787 | if (rdev->bdev->bd_dev == dev) |
788 | return rdev; | |
159ec1fc | 789 | |
1da177e4 LT |
790 | return NULL; |
791 | } | |
792 | ||
1532d9e8 | 793 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
794 | { |
795 | struct md_rdev *rdev; | |
796 | ||
797 | rdev_for_each_rcu(rdev, mddev) | |
798 | if (rdev->bdev->bd_dev == dev) | |
799 | return rdev; | |
800 | ||
801 | return NULL; | |
802 | } | |
1532d9e8 | 803 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 804 | |
84fc4b56 | 805 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 806 | { |
84fc4b56 | 807 | struct md_personality *pers; |
d9d166c2 N |
808 | list_for_each_entry(pers, &pers_list, list) { |
809 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 810 | return pers; |
d9d166c2 N |
811 | if (strcmp(pers->name, clevel)==0) |
812 | return pers; | |
813 | } | |
2604b703 N |
814 | return NULL; |
815 | } | |
816 | ||
b73df2d3 | 817 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 818 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 819 | { |
57b2caa3 | 820 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 821 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
822 | } |
823 | ||
f72ffdd6 | 824 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 825 | { |
1da177e4 | 826 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 827 | if (!rdev->sb_page) |
ebc24337 | 828 | return -ENOMEM; |
1da177e4 LT |
829 | return 0; |
830 | } | |
831 | ||
545c8795 | 832 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
833 | { |
834 | if (rdev->sb_page) { | |
2d1f3b5d | 835 | put_page(rdev->sb_page); |
1da177e4 LT |
836 | rdev->sb_loaded = 0; |
837 | rdev->sb_page = NULL; | |
0f420358 | 838 | rdev->sb_start = 0; |
dd8ac336 | 839 | rdev->sectors = 0; |
1da177e4 | 840 | } |
2699b672 N |
841 | if (rdev->bb_page) { |
842 | put_page(rdev->bb_page); | |
843 | rdev->bb_page = NULL; | |
844 | } | |
d3b407fb | 845 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 846 | } |
545c8795 | 847 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 848 | |
4246a0b6 | 849 | static void super_written(struct bio *bio) |
7bfa19f2 | 850 | { |
3cb03002 | 851 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 852 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 853 | |
4e4cbee9 CH |
854 | if (bio->bi_status) { |
855 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 856 | md_error(mddev, rdev); |
46533ff7 N |
857 | if (!test_bit(Faulty, &rdev->flags) |
858 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 859 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
860 | set_bit(LastDev, &rdev->flags); |
861 | } | |
862 | } else | |
863 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 864 | |
a9701a30 N |
865 | if (atomic_dec_and_test(&mddev->pending_writes)) |
866 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 867 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 868 | bio_put(bio); |
7bfa19f2 N |
869 | } |
870 | ||
fd01b88c | 871 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
872 | sector_t sector, int size, struct page *page) |
873 | { | |
874 | /* write first size bytes of page to sector of rdev | |
875 | * Increment mddev->pending_writes before returning | |
876 | * and decrement it on completion, waking up sb_wait | |
877 | * if zero is reached. | |
878 | * If an error occurred, call md_error | |
879 | */ | |
46533ff7 N |
880 | struct bio *bio; |
881 | int ff = 0; | |
882 | ||
4b6c1060 HM |
883 | if (!page) |
884 | return; | |
885 | ||
46533ff7 N |
886 | if (test_bit(Faulty, &rdev->flags)) |
887 | return; | |
888 | ||
5a85071c | 889 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 890 | |
ed3b98c7 SL |
891 | atomic_inc(&rdev->nr_pending); |
892 | ||
74d46992 | 893 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 894 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
895 | bio_add_page(bio, page, size, 0); |
896 | bio->bi_private = rdev; | |
897 | bio->bi_end_io = super_written; | |
46533ff7 N |
898 | |
899 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
900 | test_bit(FailFast, &rdev->flags) && | |
901 | !test_bit(LastDev, &rdev->flags)) | |
902 | ff = MD_FAILFAST; | |
5a8948f8 | 903 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 904 | |
7bfa19f2 | 905 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 906 | submit_bio(bio); |
a9701a30 N |
907 | } |
908 | ||
46533ff7 | 909 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 910 | { |
e9c7469b | 911 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 912 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 913 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
914 | return -EAGAIN; |
915 | return 0; | |
7bfa19f2 N |
916 | } |
917 | ||
3cb03002 | 918 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 919 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 920 | { |
5a85071c | 921 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
922 | int ret; |
923 | ||
74d46992 CH |
924 | if (metadata_op && rdev->meta_bdev) |
925 | bio_set_dev(bio, rdev->meta_bdev); | |
926 | else | |
927 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 928 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 929 | if (metadata_op) |
4f024f37 | 930 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
931 | else if (rdev->mddev->reshape_position != MaxSector && |
932 | (rdev->mddev->reshape_backwards == | |
933 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 934 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 935 | else |
4f024f37 | 936 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 937 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
938 | |
939 | submit_bio_wait(bio); | |
1da177e4 | 940 | |
4e4cbee9 | 941 | ret = !bio->bi_status; |
1da177e4 LT |
942 | bio_put(bio); |
943 | return ret; | |
944 | } | |
a8745db2 | 945 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 946 | |
f72ffdd6 | 947 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
948 | { |
949 | char b[BDEVNAME_SIZE]; | |
403df478 | 950 | |
1da177e4 LT |
951 | if (rdev->sb_loaded) |
952 | return 0; | |
953 | ||
796a5cf0 | 954 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
955 | goto fail; |
956 | rdev->sb_loaded = 1; | |
957 | return 0; | |
958 | ||
959 | fail: | |
9d48739e N |
960 | pr_err("md: disabled device %s, could not read superblock.\n", |
961 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
962 | return -EINVAL; |
963 | } | |
964 | ||
e6fd2093 | 965 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 966 | { |
f72ffdd6 | 967 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
968 | sb1->set_uuid1 == sb2->set_uuid1 && |
969 | sb1->set_uuid2 == sb2->set_uuid2 && | |
970 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
971 | } |
972 | ||
e6fd2093 | 973 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
974 | { |
975 | int ret; | |
976 | mdp_super_t *tmp1, *tmp2; | |
977 | ||
978 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
979 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
980 | ||
981 | if (!tmp1 || !tmp2) { | |
982 | ret = 0; | |
1da177e4 LT |
983 | goto abort; |
984 | } | |
985 | ||
986 | *tmp1 = *sb1; | |
987 | *tmp2 = *sb2; | |
988 | ||
989 | /* | |
990 | * nr_disks is not constant | |
991 | */ | |
992 | tmp1->nr_disks = 0; | |
993 | tmp2->nr_disks = 0; | |
994 | ||
ce0c8e05 | 995 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 996 | abort: |
990a8baf JJ |
997 | kfree(tmp1); |
998 | kfree(tmp2); | |
1da177e4 LT |
999 | return ret; |
1000 | } | |
1001 | ||
4d167f09 N |
1002 | static u32 md_csum_fold(u32 csum) |
1003 | { | |
1004 | csum = (csum & 0xffff) + (csum >> 16); | |
1005 | return (csum & 0xffff) + (csum >> 16); | |
1006 | } | |
1007 | ||
f72ffdd6 | 1008 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1009 | { |
4d167f09 N |
1010 | u64 newcsum = 0; |
1011 | u32 *sb32 = (u32*)sb; | |
1012 | int i; | |
1da177e4 LT |
1013 | unsigned int disk_csum, csum; |
1014 | ||
1015 | disk_csum = sb->sb_csum; | |
1016 | sb->sb_csum = 0; | |
4d167f09 N |
1017 | |
1018 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1019 | newcsum += sb32[i]; | |
1020 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1021 | ||
4d167f09 N |
1022 | #ifdef CONFIG_ALPHA |
1023 | /* This used to use csum_partial, which was wrong for several | |
1024 | * reasons including that different results are returned on | |
1025 | * different architectures. It isn't critical that we get exactly | |
1026 | * the same return value as before (we always csum_fold before | |
1027 | * testing, and that removes any differences). However as we | |
1028 | * know that csum_partial always returned a 16bit value on | |
1029 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1030 | */ | |
1031 | sb->sb_csum = md_csum_fold(disk_csum); | |
1032 | #else | |
1da177e4 | 1033 | sb->sb_csum = disk_csum; |
4d167f09 | 1034 | #endif |
1da177e4 LT |
1035 | return csum; |
1036 | } | |
1037 | ||
1da177e4 LT |
1038 | /* |
1039 | * Handle superblock details. | |
1040 | * We want to be able to handle multiple superblock formats | |
1041 | * so we have a common interface to them all, and an array of | |
1042 | * different handlers. | |
1043 | * We rely on user-space to write the initial superblock, and support | |
1044 | * reading and updating of superblocks. | |
1045 | * Interface methods are: | |
3cb03002 | 1046 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1047 | * loads and validates a superblock on dev. |
1048 | * if refdev != NULL, compare superblocks on both devices | |
1049 | * Return: | |
1050 | * 0 - dev has a superblock that is compatible with refdev | |
1051 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1052 | * so dev should be used as the refdev in future | |
1053 | * -EINVAL superblock incompatible or invalid | |
1054 | * -othererror e.g. -EIO | |
1055 | * | |
fd01b88c | 1056 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1057 | * Verify that dev is acceptable into mddev. |
1058 | * The first time, mddev->raid_disks will be 0, and data from | |
1059 | * dev should be merged in. Subsequent calls check that dev | |
1060 | * is new enough. Return 0 or -EINVAL | |
1061 | * | |
fd01b88c | 1062 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1063 | * Update the superblock for rdev with data in mddev |
1064 | * This does not write to disc. | |
1065 | * | |
1066 | */ | |
1067 | ||
1068 | struct super_type { | |
0cd17fec CW |
1069 | char *name; |
1070 | struct module *owner; | |
c6563a8c N |
1071 | int (*load_super)(struct md_rdev *rdev, |
1072 | struct md_rdev *refdev, | |
0cd17fec | 1073 | int minor_version); |
c6563a8c N |
1074 | int (*validate_super)(struct mddev *mddev, |
1075 | struct md_rdev *rdev); | |
1076 | void (*sync_super)(struct mddev *mddev, | |
1077 | struct md_rdev *rdev); | |
3cb03002 | 1078 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1079 | sector_t num_sectors); |
c6563a8c N |
1080 | int (*allow_new_offset)(struct md_rdev *rdev, |
1081 | unsigned long long new_offset); | |
1da177e4 LT |
1082 | }; |
1083 | ||
0894cc30 AN |
1084 | /* |
1085 | * Check that the given mddev has no bitmap. | |
1086 | * | |
1087 | * This function is called from the run method of all personalities that do not | |
1088 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1089 | * has a bitmap. Otherwise, it returns 0. | |
1090 | * | |
1091 | */ | |
fd01b88c | 1092 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1093 | { |
c3d9714e | 1094 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1095 | return 0; |
9d48739e | 1096 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1097 | mdname(mddev), mddev->pers->name); |
1098 | return 1; | |
1099 | } | |
1100 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1101 | ||
1da177e4 | 1102 | /* |
f72ffdd6 | 1103 | * load_super for 0.90.0 |
1da177e4 | 1104 | */ |
3cb03002 | 1105 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1106 | { |
1107 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1108 | mdp_super_t *sb; | |
1109 | int ret; | |
228fc7d7 | 1110 | bool spare_disk = true; |
1da177e4 LT |
1111 | |
1112 | /* | |
0f420358 | 1113 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1114 | * it's at the end of the disk. |
1115 | * | |
1116 | * It also happens to be a multiple of 4Kb. | |
1117 | */ | |
57b2caa3 | 1118 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1119 | |
0002b271 | 1120 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1121 | if (ret) |
1122 | return ret; | |
1da177e4 LT |
1123 | |
1124 | ret = -EINVAL; | |
1125 | ||
1126 | bdevname(rdev->bdev, b); | |
65a06f06 | 1127 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1128 | |
1129 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1130 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1131 | goto abort; |
1132 | } | |
1133 | ||
1134 | if (sb->major_version != 0 || | |
f6705578 N |
1135 | sb->minor_version < 90 || |
1136 | sb->minor_version > 91) { | |
9d48739e N |
1137 | pr_warn("Bad version number %d.%d on %s\n", |
1138 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1139 | goto abort; |
1140 | } | |
1141 | ||
1142 | if (sb->raid_disks <= 0) | |
1143 | goto abort; | |
1144 | ||
4d167f09 | 1145 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1146 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1147 | goto abort; |
1148 | } | |
1149 | ||
1150 | rdev->preferred_minor = sb->md_minor; | |
1151 | rdev->data_offset = 0; | |
c6563a8c | 1152 | rdev->new_data_offset = 0; |
0002b271 | 1153 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1154 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1155 | |
1156 | if (sb->level == LEVEL_MULTIPATH) | |
1157 | rdev->desc_nr = -1; | |
1158 | else | |
1159 | rdev->desc_nr = sb->this_disk.number; | |
1160 | ||
228fc7d7 YY |
1161 | /* not spare disk, or LEVEL_MULTIPATH */ |
1162 | if (sb->level == LEVEL_MULTIPATH || | |
1163 | (rdev->desc_nr >= 0 && | |
3b7436cc | 1164 | rdev->desc_nr < MD_SB_DISKS && |
228fc7d7 YY |
1165 | sb->disks[rdev->desc_nr].state & |
1166 | ((1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE)))) | |
1167 | spare_disk = false; | |
1168 | ||
9a7b2b0f | 1169 | if (!refdev) { |
228fc7d7 | 1170 | if (!spare_disk) |
6a5cb53a YY |
1171 | ret = 1; |
1172 | else | |
1173 | ret = 0; | |
9a7b2b0f | 1174 | } else { |
1da177e4 | 1175 | __u64 ev1, ev2; |
65a06f06 | 1176 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1177 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1178 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1179 | b, bdevname(refdev->bdev,b2)); |
1180 | goto abort; | |
1181 | } | |
e6fd2093 | 1182 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1183 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1184 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1185 | goto abort; |
1186 | } | |
1187 | ev1 = md_event(sb); | |
1188 | ev2 = md_event(refsb); | |
6a5cb53a | 1189 | |
228fc7d7 | 1190 | if (!spare_disk && ev1 > ev2) |
1da177e4 | 1191 | ret = 1; |
f72ffdd6 | 1192 | else |
1da177e4 LT |
1193 | ret = 0; |
1194 | } | |
8190e754 | 1195 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1196 | /* Limit to 4TB as metadata cannot record more than that. |
1197 | * (not needed for Linear and RAID0 as metadata doesn't | |
1198 | * record this size) | |
1199 | */ | |
72deb455 | 1200 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1201 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1202 | |
27a7b260 | 1203 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1204 | /* "this cannot possibly happen" ... */ |
1205 | ret = -EINVAL; | |
1206 | ||
1da177e4 LT |
1207 | abort: |
1208 | return ret; | |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * validate_super for 0.90.0 | |
1213 | */ | |
fd01b88c | 1214 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1215 | { |
1216 | mdp_disk_t *desc; | |
65a06f06 | 1217 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1218 | __u64 ev1 = md_event(sb); |
1da177e4 | 1219 | |
41158c7e | 1220 | rdev->raid_disk = -1; |
c5d79adb N |
1221 | clear_bit(Faulty, &rdev->flags); |
1222 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1223 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1224 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1225 | |
1da177e4 LT |
1226 | if (mddev->raid_disks == 0) { |
1227 | mddev->major_version = 0; | |
1228 | mddev->minor_version = sb->minor_version; | |
1229 | mddev->patch_version = sb->patch_version; | |
e691063a | 1230 | mddev->external = 0; |
9d8f0363 | 1231 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1232 | mddev->ctime = sb->ctime; |
1233 | mddev->utime = sb->utime; | |
1234 | mddev->level = sb->level; | |
d9d166c2 | 1235 | mddev->clevel[0] = 0; |
1da177e4 LT |
1236 | mddev->layout = sb->layout; |
1237 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1238 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1239 | mddev->events = ev1; |
c3d9714e | 1240 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1241 | mddev->bitmap_info.space = 0; |
1242 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1243 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1244 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1245 | mddev->reshape_backwards = 0; |
1da177e4 | 1246 | |
f6705578 N |
1247 | if (mddev->minor_version >= 91) { |
1248 | mddev->reshape_position = sb->reshape_position; | |
1249 | mddev->delta_disks = sb->delta_disks; | |
1250 | mddev->new_level = sb->new_level; | |
1251 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1252 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1253 | if (mddev->delta_disks < 0) |
1254 | mddev->reshape_backwards = 1; | |
f6705578 N |
1255 | } else { |
1256 | mddev->reshape_position = MaxSector; | |
1257 | mddev->delta_disks = 0; | |
1258 | mddev->new_level = mddev->level; | |
1259 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1260 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1261 | } |
33f2c35a N |
1262 | if (mddev->level == 0) |
1263 | mddev->layout = -1; | |
f6705578 | 1264 | |
1da177e4 LT |
1265 | if (sb->state & (1<<MD_SB_CLEAN)) |
1266 | mddev->recovery_cp = MaxSector; | |
1267 | else { | |
f72ffdd6 | 1268 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1269 | sb->events_lo == sb->cp_events_lo) { |
1270 | mddev->recovery_cp = sb->recovery_cp; | |
1271 | } else | |
1272 | mddev->recovery_cp = 0; | |
1273 | } | |
1274 | ||
1275 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1276 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1277 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1278 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1279 | ||
1280 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1281 | |
1282 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1283 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1284 | mddev->bitmap_info.offset = |
1285 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1286 | mddev->bitmap_info.space = |
c9ad020f | 1287 | mddev->bitmap_info.default_space; |
6409bb05 | 1288 | } |
a654b9d8 | 1289 | |
41158c7e | 1290 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1291 | /* Insist on good event counter while assembling, except |
1292 | * for spares (which don't need an event count) */ | |
1da177e4 | 1293 | ++ev1; |
be6800a7 N |
1294 | if (sb->disks[rdev->desc_nr].state & ( |
1295 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1296 | if (ev1 < mddev->events) |
be6800a7 | 1297 | return -EINVAL; |
41158c7e N |
1298 | } else if (mddev->bitmap) { |
1299 | /* if adding to array with a bitmap, then we can accept an | |
1300 | * older device ... but not too old. | |
1301 | */ | |
41158c7e N |
1302 | if (ev1 < mddev->bitmap->events_cleared) |
1303 | return 0; | |
8313b8e5 N |
1304 | if (ev1 < mddev->events) |
1305 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1306 | } else { |
1307 | if (ev1 < mddev->events) | |
1308 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1309 | return 0; | |
1310 | } | |
41158c7e | 1311 | |
1da177e4 | 1312 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1313 | desc = sb->disks + rdev->desc_nr; |
1314 | ||
1315 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1316 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1317 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1318 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1319 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1320 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1321 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1322 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1323 | /* active but not in sync implies recovery up to | |
1324 | * reshape position. We don't know exactly where | |
1325 | * that is, so set to zero for now */ | |
1326 | if (mddev->minor_version >= 91) { | |
1327 | rdev->recovery_offset = 0; | |
1328 | rdev->raid_disk = desc->raid_disk; | |
1329 | } | |
1da177e4 | 1330 | } |
8ddf9efe N |
1331 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1332 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1333 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1334 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1335 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1336 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1337 | return 0; |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * sync_super for 0.90.0 | |
1342 | */ | |
fd01b88c | 1343 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1344 | { |
1345 | mdp_super_t *sb; | |
3cb03002 | 1346 | struct md_rdev *rdev2; |
1da177e4 | 1347 | int next_spare = mddev->raid_disks; |
19133a42 | 1348 | |
1da177e4 LT |
1349 | /* make rdev->sb match mddev data.. |
1350 | * | |
1351 | * 1/ zero out disks | |
1352 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1353 | * 3/ any empty disks < next_spare become removed | |
1354 | * | |
1355 | * disks[0] gets initialised to REMOVED because | |
1356 | * we cannot be sure from other fields if it has | |
1357 | * been initialised or not. | |
1358 | */ | |
1359 | int i; | |
1360 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1361 | ||
61181565 N |
1362 | rdev->sb_size = MD_SB_BYTES; |
1363 | ||
65a06f06 | 1364 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1365 | |
1366 | memset(sb, 0, sizeof(*sb)); | |
1367 | ||
1368 | sb->md_magic = MD_SB_MAGIC; | |
1369 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1370 | sb->patch_version = mddev->patch_version; |
1371 | sb->gvalid_words = 0; /* ignored */ | |
1372 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1373 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1374 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1375 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1376 | ||
9ebc6ef1 | 1377 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1378 | sb->level = mddev->level; |
58c0fed4 | 1379 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1380 | sb->raid_disks = mddev->raid_disks; |
1381 | sb->md_minor = mddev->md_minor; | |
e691063a | 1382 | sb->not_persistent = 0; |
9ebc6ef1 | 1383 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1384 | sb->state = 0; |
1385 | sb->events_hi = (mddev->events>>32); | |
1386 | sb->events_lo = (u32)mddev->events; | |
1387 | ||
f6705578 N |
1388 | if (mddev->reshape_position == MaxSector) |
1389 | sb->minor_version = 90; | |
1390 | else { | |
1391 | sb->minor_version = 91; | |
1392 | sb->reshape_position = mddev->reshape_position; | |
1393 | sb->new_level = mddev->new_level; | |
1394 | sb->delta_disks = mddev->delta_disks; | |
1395 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1396 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1397 | } |
1398 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1399 | if (mddev->in_sync) |
1400 | { | |
1401 | sb->recovery_cp = mddev->recovery_cp; | |
1402 | sb->cp_events_hi = (mddev->events>>32); | |
1403 | sb->cp_events_lo = (u32)mddev->events; | |
1404 | if (mddev->recovery_cp == MaxSector) | |
1405 | sb->state = (1<< MD_SB_CLEAN); | |
1406 | } else | |
1407 | sb->recovery_cp = 0; | |
1408 | ||
1409 | sb->layout = mddev->layout; | |
9d8f0363 | 1410 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1411 | |
c3d9714e | 1412 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1413 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1414 | ||
1da177e4 | 1415 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1416 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1417 | mdp_disk_t *d; |
86e6ffdd | 1418 | int desc_nr; |
0261cd9f N |
1419 | int is_active = test_bit(In_sync, &rdev2->flags); |
1420 | ||
1421 | if (rdev2->raid_disk >= 0 && | |
1422 | sb->minor_version >= 91) | |
1423 | /* we have nowhere to store the recovery_offset, | |
1424 | * but if it is not below the reshape_position, | |
1425 | * we can piggy-back on that. | |
1426 | */ | |
1427 | is_active = 1; | |
1428 | if (rdev2->raid_disk < 0 || | |
1429 | test_bit(Faulty, &rdev2->flags)) | |
1430 | is_active = 0; | |
1431 | if (is_active) | |
86e6ffdd | 1432 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1433 | else |
86e6ffdd | 1434 | desc_nr = next_spare++; |
19133a42 | 1435 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1436 | d = &sb->disks[rdev2->desc_nr]; |
1437 | nr_disks++; | |
1438 | d->number = rdev2->desc_nr; | |
1439 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1440 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1441 | if (is_active) |
1da177e4 LT |
1442 | d->raid_disk = rdev2->raid_disk; |
1443 | else | |
1444 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1445 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1446 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1447 | else if (is_active) { |
1da177e4 | 1448 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1449 | if (test_bit(In_sync, &rdev2->flags)) |
1450 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1451 | active++; |
1452 | working++; | |
1453 | } else { | |
1454 | d->state = 0; | |
1455 | spare++; | |
1456 | working++; | |
1457 | } | |
8ddf9efe N |
1458 | if (test_bit(WriteMostly, &rdev2->flags)) |
1459 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1460 | if (test_bit(FailFast, &rdev2->flags)) |
1461 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1462 | } |
1da177e4 LT |
1463 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1464 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1465 | mdp_disk_t *d = &sb->disks[i]; | |
1466 | if (d->state == 0 && d->number == 0) { | |
1467 | d->number = i; | |
1468 | d->raid_disk = i; | |
1469 | d->state = (1<<MD_DISK_REMOVED); | |
1470 | d->state |= (1<<MD_DISK_FAULTY); | |
1471 | failed++; | |
1472 | } | |
1473 | } | |
1474 | sb->nr_disks = nr_disks; | |
1475 | sb->active_disks = active; | |
1476 | sb->working_disks = working; | |
1477 | sb->failed_disks = failed; | |
1478 | sb->spare_disks = spare; | |
1479 | ||
1480 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1481 | sb->sb_csum = calc_sb_csum(sb); | |
1482 | } | |
1483 | ||
0cd17fec CW |
1484 | /* |
1485 | * rdev_size_change for 0.90.0 | |
1486 | */ | |
1487 | static unsigned long long | |
3cb03002 | 1488 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1489 | { |
58c0fed4 | 1490 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1491 | return 0; /* component must fit device */ |
c3d9714e | 1492 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1493 | return 0; /* can't move bitmap */ |
57b2caa3 | 1494 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1495 | if (!num_sectors || num_sectors > rdev->sb_start) |
1496 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1497 | /* Limit to 4TB as metadata cannot record more than that. |
1498 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1499 | */ | |
72deb455 | 1500 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1501 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1502 | do { |
1503 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1504 | rdev->sb_page); |
46533ff7 | 1505 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1506 | return num_sectors; |
0cd17fec CW |
1507 | } |
1508 | ||
c6563a8c N |
1509 | static int |
1510 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1511 | { | |
1512 | /* non-zero offset changes not possible with v0.90 */ | |
1513 | return new_offset == 0; | |
1514 | } | |
0cd17fec | 1515 | |
1da177e4 LT |
1516 | /* |
1517 | * version 1 superblock | |
1518 | */ | |
1519 | ||
f72ffdd6 | 1520 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1521 | { |
1c05b4bc N |
1522 | __le32 disk_csum; |
1523 | u32 csum; | |
1da177e4 LT |
1524 | unsigned long long newcsum; |
1525 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1526 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1527 | |
1528 | disk_csum = sb->sb_csum; | |
1529 | sb->sb_csum = 0; | |
1530 | newcsum = 0; | |
1f3c9907 | 1531 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1532 | newcsum += le32_to_cpu(*isuper++); |
1533 | ||
1534 | if (size == 2) | |
1c05b4bc | 1535 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1536 | |
1537 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1538 | sb->sb_csum = disk_csum; | |
1539 | return cpu_to_le32(csum); | |
1540 | } | |
1541 | ||
3cb03002 | 1542 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1543 | { |
1544 | struct mdp_superblock_1 *sb; | |
1545 | int ret; | |
0f420358 | 1546 | sector_t sb_start; |
c6563a8c | 1547 | sector_t sectors; |
1da177e4 | 1548 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1549 | int bmask; |
228fc7d7 | 1550 | bool spare_disk = true; |
1da177e4 LT |
1551 | |
1552 | /* | |
0f420358 | 1553 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1554 | * It is always aligned to a 4K boundary and |
1555 | * depeding on minor_version, it can be: | |
1556 | * 0: At least 8K, but less than 12K, from end of device | |
1557 | * 1: At start of device | |
1558 | * 2: 4K from start of device. | |
1559 | */ | |
1560 | switch(minor_version) { | |
1561 | case 0: | |
77304d2a | 1562 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1563 | sb_start -= 8*2; |
1564 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1565 | break; |
1566 | case 1: | |
0f420358 | 1567 | sb_start = 0; |
1da177e4 LT |
1568 | break; |
1569 | case 2: | |
0f420358 | 1570 | sb_start = 8; |
1da177e4 LT |
1571 | break; |
1572 | default: | |
1573 | return -EINVAL; | |
1574 | } | |
0f420358 | 1575 | rdev->sb_start = sb_start; |
1da177e4 | 1576 | |
0002b271 N |
1577 | /* superblock is rarely larger than 1K, but it can be larger, |
1578 | * and it is safe to read 4k, so we do that | |
1579 | */ | |
1580 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1581 | if (ret) return ret; |
1582 | ||
65a06f06 | 1583 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1584 | |
1585 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1586 | sb->major_version != cpu_to_le32(1) || | |
1587 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1588 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1589 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1590 | return -EINVAL; |
1591 | ||
1592 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1593 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1594 | bdevname(rdev->bdev,b)); |
1595 | return -EINVAL; | |
1596 | } | |
1597 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1598 | pr_warn("md: data_size too small on %s\n", |
1599 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1600 | return -EINVAL; |
1601 | } | |
c6563a8c N |
1602 | if (sb->pad0 || |
1603 | sb->pad3[0] || | |
1604 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1605 | /* Some padding is non-zero, might be a new feature */ | |
1606 | return -EINVAL; | |
e11e93fa | 1607 | |
1da177e4 LT |
1608 | rdev->preferred_minor = 0xffff; |
1609 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1610 | rdev->new_data_offset = rdev->data_offset; |
1611 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1612 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1613 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1614 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1615 | |
0002b271 | 1616 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1617 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1618 | if (rdev->sb_size & bmask) |
a1801f85 N |
1619 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1620 | ||
1621 | if (minor_version | |
0f420358 | 1622 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1623 | return -EINVAL; |
c6563a8c N |
1624 | if (minor_version |
1625 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1626 | return -EINVAL; | |
0002b271 | 1627 | |
31b65a0d N |
1628 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1629 | rdev->desc_nr = -1; | |
1630 | else | |
1631 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1632 | ||
2699b672 N |
1633 | if (!rdev->bb_page) { |
1634 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1635 | if (!rdev->bb_page) | |
1636 | return -ENOMEM; | |
1637 | } | |
1638 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1639 | rdev->badblocks.count == 0) { | |
1640 | /* need to load the bad block list. | |
1641 | * Currently we limit it to one page. | |
1642 | */ | |
1643 | s32 offset; | |
1644 | sector_t bb_sector; | |
00485d09 | 1645 | __le64 *bbp; |
2699b672 N |
1646 | int i; |
1647 | int sectors = le16_to_cpu(sb->bblog_size); | |
1648 | if (sectors > (PAGE_SIZE / 512)) | |
1649 | return -EINVAL; | |
1650 | offset = le32_to_cpu(sb->bblog_offset); | |
1651 | if (offset == 0) | |
1652 | return -EINVAL; | |
1653 | bb_sector = (long long)offset; | |
1654 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1655 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1656 | return -EIO; |
00485d09 | 1657 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1658 | rdev->badblocks.shift = sb->bblog_shift; |
1659 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1660 | u64 bb = le64_to_cpu(*bbp); | |
1661 | int count = bb & (0x3ff); | |
1662 | u64 sector = bb >> 10; | |
1663 | sector <<= sb->bblog_shift; | |
1664 | count <<= sb->bblog_shift; | |
1665 | if (bb + 1 == 0) | |
1666 | break; | |
fc974ee2 | 1667 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1668 | return -EINVAL; |
1669 | } | |
486adf72 N |
1670 | } else if (sb->bblog_offset != 0) |
1671 | rdev->badblocks.shift = 0; | |
2699b672 | 1672 | |
ddc08823 PB |
1673 | if ((le32_to_cpu(sb->feature_map) & |
1674 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1675 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1676 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1677 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1678 | } | |
1679 | ||
33f2c35a N |
1680 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1681 | sb->level != 0) | |
1682 | return -EINVAL; | |
1683 | ||
228fc7d7 YY |
1684 | /* not spare disk, or LEVEL_MULTIPATH */ |
1685 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || | |
1686 | (rdev->desc_nr >= 0 && | |
1687 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
1688 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || | |
1689 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) | |
1690 | spare_disk = false; | |
6a5cb53a | 1691 | |
9a7b2b0f | 1692 | if (!refdev) { |
228fc7d7 | 1693 | if (!spare_disk) |
6a5cb53a YY |
1694 | ret = 1; |
1695 | else | |
1696 | ret = 0; | |
9a7b2b0f | 1697 | } else { |
1da177e4 | 1698 | __u64 ev1, ev2; |
65a06f06 | 1699 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1700 | |
1701 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1702 | sb->level != refsb->level || | |
1703 | sb->layout != refsb->layout || | |
1704 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1705 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1706 | bdevname(rdev->bdev,b), |
1707 | bdevname(refdev->bdev,b2)); | |
1708 | return -EINVAL; | |
1709 | } | |
1710 | ev1 = le64_to_cpu(sb->events); | |
1711 | ev2 = le64_to_cpu(refsb->events); | |
1712 | ||
228fc7d7 | 1713 | if (!spare_disk && ev1 > ev2) |
8ed75463 N |
1714 | ret = 1; |
1715 | else | |
1716 | ret = 0; | |
1da177e4 | 1717 | } |
c6563a8c N |
1718 | if (minor_version) { |
1719 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1720 | sectors -= rdev->data_offset; | |
1721 | } else | |
1722 | sectors = rdev->sb_start; | |
1723 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1724 | return -EINVAL; |
dd8ac336 | 1725 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1726 | return ret; |
1da177e4 LT |
1727 | } |
1728 | ||
fd01b88c | 1729 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1730 | { |
65a06f06 | 1731 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1732 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1733 | |
41158c7e | 1734 | rdev->raid_disk = -1; |
c5d79adb N |
1735 | clear_bit(Faulty, &rdev->flags); |
1736 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1737 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1738 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1739 | |
1da177e4 LT |
1740 | if (mddev->raid_disks == 0) { |
1741 | mddev->major_version = 1; | |
1742 | mddev->patch_version = 0; | |
e691063a | 1743 | mddev->external = 0; |
9d8f0363 | 1744 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1745 | mddev->ctime = le64_to_cpu(sb->ctime); |
1746 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1747 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1748 | mddev->clevel[0] = 0; |
1da177e4 LT |
1749 | mddev->layout = le32_to_cpu(sb->layout); |
1750 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1751 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1752 | mddev->events = ev1; |
c3d9714e | 1753 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1754 | mddev->bitmap_info.space = 0; |
1755 | /* Default location for bitmap is 1K after superblock | |
1756 | * using 3K - total of 4K | |
1757 | */ | |
c3d9714e | 1758 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1759 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1760 | mddev->reshape_backwards = 0; |
1761 | ||
1da177e4 LT |
1762 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1763 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1764 | ||
1765 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1766 | |
71c0805c | 1767 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1768 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1769 | mddev->bitmap_info.offset = |
1770 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1771 | /* Metadata doesn't record how much space is available. |
1772 | * For 1.0, we assume we can use up to the superblock | |
1773 | * if before, else to 4K beyond superblock. | |
1774 | * For others, assume no change is possible. | |
1775 | */ | |
1776 | if (mddev->minor_version > 0) | |
1777 | mddev->bitmap_info.space = 0; | |
1778 | else if (mddev->bitmap_info.offset > 0) | |
1779 | mddev->bitmap_info.space = | |
1780 | 8 - mddev->bitmap_info.offset; | |
1781 | else | |
1782 | mddev->bitmap_info.space = | |
1783 | -mddev->bitmap_info.offset; | |
1784 | } | |
e11e93fa | 1785 | |
f6705578 N |
1786 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1787 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1788 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1789 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1790 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1791 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1792 | if (mddev->delta_disks < 0 || |
1793 | (mddev->delta_disks == 0 && | |
1794 | (le32_to_cpu(sb->feature_map) | |
1795 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1796 | mddev->reshape_backwards = 1; | |
f6705578 N |
1797 | } else { |
1798 | mddev->reshape_position = MaxSector; | |
1799 | mddev->delta_disks = 0; | |
1800 | mddev->new_level = mddev->level; | |
1801 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1802 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1803 | } |
1804 | ||
33f2c35a N |
1805 | if (mddev->level == 0 && |
1806 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1807 | mddev->layout = -1; | |
1808 | ||
486b0f7b | 1809 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1810 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1811 | |
ddc08823 PB |
1812 | if (le32_to_cpu(sb->feature_map) & |
1813 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1814 | if (le32_to_cpu(sb->feature_map) & |
1815 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1816 | return -EINVAL; | |
ddc08823 PB |
1817 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1818 | (le32_to_cpu(sb->feature_map) & | |
1819 | MD_FEATURE_MULTIPLE_PPLS)) | |
1820 | return -EINVAL; | |
ea0213e0 AP |
1821 | set_bit(MD_HAS_PPL, &mddev->flags); |
1822 | } | |
41158c7e | 1823 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1824 | /* Insist of good event counter while assembling, except for |
1825 | * spares (which don't need an event count) */ | |
1da177e4 | 1826 | ++ev1; |
be6800a7 N |
1827 | if (rdev->desc_nr >= 0 && |
1828 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1829 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1830 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1831 | if (ev1 < mddev->events) |
1832 | return -EINVAL; | |
41158c7e N |
1833 | } else if (mddev->bitmap) { |
1834 | /* If adding to array with a bitmap, then we can accept an | |
1835 | * older device, but not too old. | |
1836 | */ | |
41158c7e N |
1837 | if (ev1 < mddev->bitmap->events_cleared) |
1838 | return 0; | |
8313b8e5 N |
1839 | if (ev1 < mddev->events) |
1840 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1841 | } else { |
1842 | if (ev1 < mddev->events) | |
1843 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1844 | return 0; | |
1845 | } | |
1da177e4 LT |
1846 | if (mddev->level != LEVEL_MULTIPATH) { |
1847 | int role; | |
3673f305 N |
1848 | if (rdev->desc_nr < 0 || |
1849 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1850 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1851 | rdev->desc_nr = -1; |
1852 | } else | |
1853 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1854 | switch(role) { |
c4d4c91b | 1855 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1856 | break; |
c4d4c91b | 1857 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1858 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1859 | break; |
bac624f3 SL |
1860 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1861 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1862 | /* journal device without journal feature */ | |
9d48739e | 1863 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1864 | return -EINVAL; |
1865 | } | |
1866 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1867 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1868 | rdev->raid_disk = 0; |
bac624f3 | 1869 | break; |
1da177e4 | 1870 | default: |
f466722c | 1871 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1872 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1873 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1874 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1875 | if (!(le32_to_cpu(sb->feature_map) & |
1876 | MD_FEATURE_RECOVERY_BITMAP)) | |
1877 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1878 | } else { |
1879 | /* | |
1880 | * If the array is FROZEN, then the device can't | |
1881 | * be in_sync with rest of array. | |
1882 | */ | |
1883 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1884 | &mddev->recovery)) | |
1885 | set_bit(In_sync, &rdev->flags); | |
1886 | } | |
1da177e4 LT |
1887 | rdev->raid_disk = role; |
1888 | break; | |
1889 | } | |
8ddf9efe N |
1890 | if (sb->devflags & WriteMostly1) |
1891 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1892 | if (sb->devflags & FailFast1) |
1893 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1894 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1895 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1896 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1897 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1898 | |
1da177e4 LT |
1899 | return 0; |
1900 | } | |
1901 | ||
fd01b88c | 1902 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1903 | { |
1904 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1905 | struct md_rdev *rdev2; |
1da177e4 LT |
1906 | int max_dev, i; |
1907 | /* make rdev->sb match mddev and rdev data. */ | |
1908 | ||
65a06f06 | 1909 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1910 | |
1911 | sb->feature_map = 0; | |
1912 | sb->pad0 = 0; | |
5fd6c1dc | 1913 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1914 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1915 | ||
1916 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1917 | sb->events = cpu_to_le64(mddev->events); | |
1918 | if (mddev->in_sync) | |
1919 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1920 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1921 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1922 | else |
1923 | sb->resync_offset = cpu_to_le64(0); | |
1924 | ||
1c05b4bc | 1925 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1926 | |
f0ca340c | 1927 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1928 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1929 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1930 | sb->level = cpu_to_le32(mddev->level); |
1931 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1932 | if (test_bit(FailFast, &rdev->flags)) |
1933 | sb->devflags |= FailFast1; | |
1934 | else | |
1935 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1936 | |
aeb9b211 N |
1937 | if (test_bit(WriteMostly, &rdev->flags)) |
1938 | sb->devflags |= WriteMostly1; | |
1939 | else | |
1940 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1941 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1942 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1943 | |
c3d9714e N |
1944 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1945 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1946 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1947 | } |
5fd6c1dc | 1948 | |
f2076e7d | 1949 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1950 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1951 | sb->feature_map |= |
1952 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1953 | sb->recovery_offset = | |
1954 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1955 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1956 | sb->feature_map |= | |
1957 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1958 | } |
3069aa8d SL |
1959 | /* Note: recovery_offset and journal_tail share space */ |
1960 | if (test_bit(Journal, &rdev->flags)) | |
1961 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1962 | if (test_bit(Replacement, &rdev->flags)) |
1963 | sb->feature_map |= | |
1964 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1965 | |
f6705578 N |
1966 | if (mddev->reshape_position != MaxSector) { |
1967 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1968 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1969 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1970 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1971 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1972 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1973 | if (mddev->delta_disks == 0 && |
1974 | mddev->reshape_backwards) | |
1975 | sb->feature_map | |
1976 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1977 | if (rdev->new_data_offset != rdev->data_offset) { |
1978 | sb->feature_map | |
1979 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1980 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1981 | - rdev->data_offset)); | |
1982 | } | |
f6705578 | 1983 | } |
a654b9d8 | 1984 | |
3c462c88 GR |
1985 | if (mddev_is_clustered(mddev)) |
1986 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1987 | ||
2699b672 N |
1988 | if (rdev->badblocks.count == 0) |
1989 | /* Nothing to do for bad blocks*/ ; | |
1990 | else if (sb->bblog_offset == 0) | |
1991 | /* Cannot record bad blocks on this device */ | |
1992 | md_error(mddev, rdev); | |
1993 | else { | |
1994 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 1995 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1996 | u64 *p = bb->page; |
1997 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1998 | if (bb->changed) { | |
1999 | unsigned seq; | |
2000 | ||
2001 | retry: | |
2002 | seq = read_seqbegin(&bb->lock); | |
2003 | ||
2004 | memset(bbp, 0xff, PAGE_SIZE); | |
2005 | ||
2006 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 2007 | u64 internal_bb = p[i]; |
2699b672 N |
2008 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
2009 | | BB_LEN(internal_bb)); | |
35f9ac2d | 2010 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 2011 | } |
d0962936 | 2012 | bb->changed = 0; |
2699b672 N |
2013 | if (read_seqretry(&bb->lock, seq)) |
2014 | goto retry; | |
2015 | ||
2016 | bb->sector = (rdev->sb_start + | |
2017 | (int)le32_to_cpu(sb->bblog_offset)); | |
2018 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
2019 | } |
2020 | } | |
2021 | ||
1da177e4 | 2022 | max_dev = 0; |
dafb20fa | 2023 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
2024 | if (rdev2->desc_nr+1 > max_dev) |
2025 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 2026 | |
70471daf N |
2027 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2028 | int bmask; | |
a778b73f | 2029 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2030 | rdev->sb_size = max_dev * 2 + 256; |
2031 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2032 | if (rdev->sb_size & bmask) | |
2033 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2034 | } else |
2035 | max_dev = le32_to_cpu(sb->max_dev); | |
2036 | ||
1da177e4 | 2037 | for (i=0; i<max_dev;i++) |
8df72024 | 2038 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2039 | |
a97b7896 SL |
2040 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2041 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2042 | |
ea0213e0 | 2043 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2044 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2045 | sb->feature_map |= | |
2046 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2047 | else | |
2048 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2049 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2050 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2051 | } | |
2052 | ||
dafb20fa | 2053 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2054 | i = rdev2->desc_nr; |
b2d444d7 | 2055 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2056 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2057 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2058 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2059 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2060 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2061 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2062 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2063 | else |
c4d4c91b | 2064 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2065 | } |
2066 | ||
1da177e4 LT |
2067 | sb->sb_csum = calc_sb_1_csum(sb); |
2068 | } | |
2069 | ||
0cd17fec | 2070 | static unsigned long long |
3cb03002 | 2071 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2072 | { |
2073 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2074 | sector_t max_sectors; |
58c0fed4 | 2075 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2076 | return 0; /* component must fit device */ |
c6563a8c N |
2077 | if (rdev->data_offset != rdev->new_data_offset) |
2078 | return 0; /* too confusing */ | |
0f420358 | 2079 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2080 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2081 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2082 | max_sectors -= rdev->data_offset; |
2083 | if (!num_sectors || num_sectors > max_sectors) | |
2084 | num_sectors = max_sectors; | |
c3d9714e | 2085 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2086 | /* minor version 0 with bitmap we can't move */ |
2087 | return 0; | |
2088 | } else { | |
2089 | /* minor version 0; superblock after data */ | |
0f420358 | 2090 | sector_t sb_start; |
77304d2a | 2091 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 2092 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 2093 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
2094 | if (!num_sectors || num_sectors > max_sectors) |
2095 | num_sectors = max_sectors; | |
0f420358 | 2096 | rdev->sb_start = sb_start; |
0cd17fec | 2097 | } |
65a06f06 | 2098 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2099 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2100 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2101 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2102 | do { |
2103 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2104 | rdev->sb_page); | |
2105 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2106 | return num_sectors; |
c6563a8c N |
2107 | |
2108 | } | |
2109 | ||
2110 | static int | |
2111 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2112 | unsigned long long new_offset) | |
2113 | { | |
2114 | /* All necessary checks on new >= old have been done */ | |
2115 | struct bitmap *bitmap; | |
2116 | if (new_offset >= rdev->data_offset) | |
2117 | return 1; | |
2118 | ||
2119 | /* with 1.0 metadata, there is no metadata to tread on | |
2120 | * so we can always move back */ | |
2121 | if (rdev->mddev->minor_version == 0) | |
2122 | return 1; | |
2123 | ||
2124 | /* otherwise we must be sure not to step on | |
2125 | * any metadata, so stay: | |
2126 | * 36K beyond start of superblock | |
2127 | * beyond end of badblocks | |
2128 | * beyond write-intent bitmap | |
2129 | */ | |
2130 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2131 | return 0; | |
2132 | bitmap = rdev->mddev->bitmap; | |
2133 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2134 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2135 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2136 | return 0; |
2137 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2138 | return 0; | |
2139 | ||
2140 | return 1; | |
0cd17fec | 2141 | } |
1da177e4 | 2142 | |
75c96f85 | 2143 | static struct super_type super_types[] = { |
1da177e4 LT |
2144 | [0] = { |
2145 | .name = "0.90.0", | |
2146 | .owner = THIS_MODULE, | |
0cd17fec CW |
2147 | .load_super = super_90_load, |
2148 | .validate_super = super_90_validate, | |
2149 | .sync_super = super_90_sync, | |
2150 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2151 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2152 | }, |
2153 | [1] = { | |
2154 | .name = "md-1", | |
2155 | .owner = THIS_MODULE, | |
0cd17fec CW |
2156 | .load_super = super_1_load, |
2157 | .validate_super = super_1_validate, | |
2158 | .sync_super = super_1_sync, | |
2159 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2160 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2161 | }, |
2162 | }; | |
1da177e4 | 2163 | |
fd01b88c | 2164 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2165 | { |
2166 | if (mddev->sync_super) { | |
2167 | mddev->sync_super(mddev, rdev); | |
2168 | return; | |
2169 | } | |
2170 | ||
2171 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2172 | ||
2173 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2174 | } | |
2175 | ||
fd01b88c | 2176 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2177 | { |
3cb03002 | 2178 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2179 | |
4b80991c | 2180 | rcu_read_lock(); |
0b020e85 SL |
2181 | rdev_for_each_rcu(rdev, mddev1) { |
2182 | if (test_bit(Faulty, &rdev->flags) || | |
2183 | test_bit(Journal, &rdev->flags) || | |
2184 | rdev->raid_disk == -1) | |
2185 | continue; | |
2186 | rdev_for_each_rcu(rdev2, mddev2) { | |
2187 | if (test_bit(Faulty, &rdev2->flags) || | |
2188 | test_bit(Journal, &rdev2->flags) || | |
2189 | rdev2->raid_disk == -1) | |
2190 | continue; | |
7dd5e7c3 | 2191 | if (rdev->bdev->bd_contains == |
4b80991c N |
2192 | rdev2->bdev->bd_contains) { |
2193 | rcu_read_unlock(); | |
7dd5e7c3 | 2194 | return 1; |
4b80991c | 2195 | } |
0b020e85 SL |
2196 | } |
2197 | } | |
4b80991c | 2198 | rcu_read_unlock(); |
1da177e4 LT |
2199 | return 0; |
2200 | } | |
2201 | ||
2202 | static LIST_HEAD(pending_raid_disks); | |
2203 | ||
ac5e7113 AN |
2204 | /* |
2205 | * Try to register data integrity profile for an mddev | |
2206 | * | |
2207 | * This is called when an array is started and after a disk has been kicked | |
2208 | * from the array. It only succeeds if all working and active component devices | |
2209 | * are integrity capable with matching profiles. | |
2210 | */ | |
fd01b88c | 2211 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2212 | { |
3cb03002 | 2213 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2214 | |
2215 | if (list_empty(&mddev->disks)) | |
2216 | return 0; /* nothing to do */ | |
629acb6a JB |
2217 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2218 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2219 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2220 | /* skip spares and non-functional disks */ |
2221 | if (test_bit(Faulty, &rdev->flags)) | |
2222 | continue; | |
2223 | if (rdev->raid_disk < 0) | |
2224 | continue; | |
ac5e7113 AN |
2225 | if (!reference) { |
2226 | /* Use the first rdev as the reference */ | |
2227 | reference = rdev; | |
2228 | continue; | |
2229 | } | |
2230 | /* does this rdev's profile match the reference profile? */ | |
2231 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2232 | rdev->bdev->bd_disk) < 0) | |
2233 | return -EINVAL; | |
2234 | } | |
89078d57 MP |
2235 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2236 | return 0; | |
ac5e7113 AN |
2237 | /* |
2238 | * All component devices are integrity capable and have matching | |
2239 | * profiles, register the common profile for the md device. | |
2240 | */ | |
25520d55 MP |
2241 | blk_integrity_register(mddev->gendisk, |
2242 | bdev_get_integrity(reference->bdev)); | |
2243 | ||
9d48739e | 2244 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2245 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2246 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2247 | mdname(mddev)); |
2248 | return -EINVAL; | |
2249 | } | |
ac5e7113 AN |
2250 | return 0; |
2251 | } | |
2252 | EXPORT_SYMBOL(md_integrity_register); | |
2253 | ||
1501efad DW |
2254 | /* |
2255 | * Attempt to add an rdev, but only if it is consistent with the current | |
2256 | * integrity profile | |
2257 | */ | |
2258 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2259 | { |
2863b9eb | 2260 | struct blk_integrity *bi_mddev; |
1501efad | 2261 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2262 | |
2263 | if (!mddev->gendisk) | |
1501efad | 2264 | return 0; |
2863b9eb | 2265 | |
2863b9eb | 2266 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2267 | |
ac5e7113 | 2268 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2269 | return 0; |
2270 | ||
2271 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2272 | pr_err("%s: incompatible integrity profile for %s\n", |
2273 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2274 | return -ENXIO; |
2275 | } | |
2276 | ||
2277 | return 0; | |
3f9d99c1 | 2278 | } |
ac5e7113 | 2279 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2280 | |
f72ffdd6 | 2281 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2282 | { |
7dd5e7c3 | 2283 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2284 | struct kobject *ko; |
5e55e2f5 | 2285 | int err; |
1da177e4 | 2286 | |
11e2ede0 DW |
2287 | /* prevent duplicates */ |
2288 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2289 | return -EEXIST; | |
2290 | ||
97b20ef7 N |
2291 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2292 | mddev->pers) | |
2293 | return -EROFS; | |
2294 | ||
dd8ac336 | 2295 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2296 | if (!test_bit(Journal, &rdev->flags) && |
2297 | rdev->sectors && | |
2298 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2299 | if (mddev->pers) { |
2300 | /* Cannot change size, so fail | |
2301 | * If mddev->level <= 0, then we don't care | |
2302 | * about aligning sizes (e.g. linear) | |
2303 | */ | |
2304 | if (mddev->level > 0) | |
2305 | return -ENOSPC; | |
2306 | } else | |
dd8ac336 | 2307 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2308 | } |
1da177e4 LT |
2309 | |
2310 | /* Verify rdev->desc_nr is unique. | |
2311 | * If it is -1, assign a free number, else | |
2312 | * check number is not in use | |
2313 | */ | |
4878e9eb | 2314 | rcu_read_lock(); |
1da177e4 LT |
2315 | if (rdev->desc_nr < 0) { |
2316 | int choice = 0; | |
4878e9eb N |
2317 | if (mddev->pers) |
2318 | choice = mddev->raid_disks; | |
57d051dc | 2319 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2320 | choice++; |
2321 | rdev->desc_nr = choice; | |
2322 | } else { | |
57d051dc | 2323 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2324 | rcu_read_unlock(); |
1da177e4 | 2325 | return -EBUSY; |
4878e9eb | 2326 | } |
1da177e4 | 2327 | } |
4878e9eb | 2328 | rcu_read_unlock(); |
f6b6ec5c SL |
2329 | if (!test_bit(Journal, &rdev->flags) && |
2330 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2331 | pr_warn("md: %s: array is limited to %d devices\n", |
2332 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2333 | return -EBUSY; |
2334 | } | |
19133a42 | 2335 | bdevname(rdev->bdev,b); |
90a9befb | 2336 | strreplace(b, '/', '!'); |
649316b2 | 2337 | |
1da177e4 | 2338 | rdev->mddev = mddev; |
9d48739e | 2339 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2340 | |
963c555e | 2341 | if (mddev->raid_disks) |
404659cf | 2342 | mddev_create_serial_pool(mddev, rdev, false); |
963c555e | 2343 | |
b2d6db58 | 2344 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2345 | goto fail; |
86e6ffdd | 2346 | |
0762b8bd | 2347 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2348 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2349 | /* failure here is OK */; | |
2350 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2351 | |
4b80991c | 2352 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2353 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2354 | |
2355 | /* May as well allow recovery to be retried once */ | |
5389042f | 2356 | mddev->recovery_disabled++; |
3f9d99c1 | 2357 | |
1da177e4 | 2358 | return 0; |
5e55e2f5 N |
2359 | |
2360 | fail: | |
9d48739e N |
2361 | pr_warn("md: failed to register dev-%s for %s\n", |
2362 | b, mdname(mddev)); | |
5e55e2f5 | 2363 | return err; |
1da177e4 LT |
2364 | } |
2365 | ||
177a99b2 | 2366 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2367 | { |
3cb03002 | 2368 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2369 | kobject_del(&rdev->kobj); |
177a99b2 | 2370 | kobject_put(&rdev->kobj); |
5792a285 N |
2371 | } |
2372 | ||
f72ffdd6 | 2373 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2374 | { |
2375 | char b[BDEVNAME_SIZE]; | |
403df478 | 2376 | |
49731baa | 2377 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2378 | list_del_rcu(&rdev->same_set); |
9d48739e | 2379 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
404659cf | 2380 | mddev_destroy_serial_pool(rdev->mddev, rdev); |
1da177e4 | 2381 | rdev->mddev = NULL; |
86e6ffdd | 2382 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2383 | sysfs_put(rdev->sysfs_state); |
2384 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2385 | rdev->badblocks.count = 0; |
5792a285 | 2386 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2387 | * writing to 'remove' to "dev/state". We also need |
2388 | * to delay it due to rcu usage. | |
5792a285 | 2389 | */ |
4b80991c | 2390 | synchronize_rcu(); |
177a99b2 N |
2391 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2392 | kobject_get(&rdev->kobj); | |
e804ac78 | 2393 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2394 | } |
2395 | ||
2396 | /* | |
2397 | * prevent the device from being mounted, repartitioned or | |
2398 | * otherwise reused by a RAID array (or any other kernel | |
2399 | * subsystem), by bd_claiming the device. | |
2400 | */ | |
3cb03002 | 2401 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2402 | { |
2403 | int err = 0; | |
2404 | struct block_device *bdev; | |
2405 | char b[BDEVNAME_SIZE]; | |
2406 | ||
d4d77629 | 2407 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2408 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2409 | if (IS_ERR(bdev)) { |
9d48739e | 2410 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2411 | return PTR_ERR(bdev); |
2412 | } | |
1da177e4 LT |
2413 | rdev->bdev = bdev; |
2414 | return err; | |
2415 | } | |
2416 | ||
3cb03002 | 2417 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2418 | { |
2419 | struct block_device *bdev = rdev->bdev; | |
2420 | rdev->bdev = NULL; | |
e525fd89 | 2421 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2422 | } |
2423 | ||
2424 | void md_autodetect_dev(dev_t dev); | |
2425 | ||
f72ffdd6 | 2426 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2427 | { |
2428 | char b[BDEVNAME_SIZE]; | |
403df478 | 2429 | |
9d48739e | 2430 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2431 | md_rdev_clear(rdev); |
1da177e4 | 2432 | #ifndef MODULE |
d0fae18f N |
2433 | if (test_bit(AutoDetected, &rdev->flags)) |
2434 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2435 | #endif |
2436 | unlock_rdev(rdev); | |
86e6ffdd | 2437 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2438 | } |
2439 | ||
fb56dfef | 2440 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2441 | { |
2442 | unbind_rdev_from_array(rdev); | |
2443 | export_rdev(rdev); | |
2444 | } | |
fb56dfef | 2445 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2446 | |
fd01b88c | 2447 | static void export_array(struct mddev *mddev) |
1da177e4 | 2448 | { |
0638bb0e | 2449 | struct md_rdev *rdev; |
1da177e4 | 2450 | |
0638bb0e N |
2451 | while (!list_empty(&mddev->disks)) { |
2452 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2453 | same_set); | |
fb56dfef | 2454 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2455 | } |
1da177e4 LT |
2456 | mddev->raid_disks = 0; |
2457 | mddev->major_version = 0; | |
2458 | } | |
2459 | ||
6497709b N |
2460 | static bool set_in_sync(struct mddev *mddev) |
2461 | { | |
efa4b77b | 2462 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2463 | if (!mddev->in_sync) { |
2464 | mddev->sync_checkers++; | |
2465 | spin_unlock(&mddev->lock); | |
2466 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2467 | spin_lock(&mddev->lock); | |
2468 | if (!mddev->in_sync && | |
2469 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2470 | mddev->in_sync = 1; |
4ad23a97 N |
2471 | /* |
2472 | * Ensure ->in_sync is visible before we clear | |
2473 | * ->sync_checkers. | |
2474 | */ | |
55cc39f3 | 2475 | smp_mb(); |
6497709b N |
2476 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2477 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2478 | } | |
4ad23a97 N |
2479 | if (--mddev->sync_checkers == 0) |
2480 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2481 | } |
2482 | if (mddev->safemode == 1) | |
2483 | mddev->safemode = 0; | |
2484 | return mddev->in_sync; | |
2485 | } | |
2486 | ||
f72ffdd6 | 2487 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2488 | { |
42543769 N |
2489 | /* Update each superblock (in-memory image), but |
2490 | * if we are allowed to, skip spares which already | |
2491 | * have the right event counter, or have one earlier | |
2492 | * (which would mean they aren't being marked as dirty | |
2493 | * with the rest of the array) | |
2494 | */ | |
3cb03002 | 2495 | struct md_rdev *rdev; |
dafb20fa | 2496 | rdev_for_each(rdev, mddev) { |
42543769 N |
2497 | if (rdev->sb_events == mddev->events || |
2498 | (nospares && | |
2499 | rdev->raid_disk < 0 && | |
42543769 N |
2500 | rdev->sb_events+1 == mddev->events)) { |
2501 | /* Don't update this superblock */ | |
2502 | rdev->sb_loaded = 2; | |
2503 | } else { | |
076f968b | 2504 | sync_super(mddev, rdev); |
42543769 N |
2505 | rdev->sb_loaded = 1; |
2506 | } | |
1da177e4 LT |
2507 | } |
2508 | } | |
2509 | ||
2aa82191 GR |
2510 | static bool does_sb_need_changing(struct mddev *mddev) |
2511 | { | |
2512 | struct md_rdev *rdev; | |
2513 | struct mdp_superblock_1 *sb; | |
2514 | int role; | |
2515 | ||
2516 | /* Find a good rdev */ | |
2517 | rdev_for_each(rdev, mddev) | |
2518 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2519 | break; | |
2520 | ||
2521 | /* No good device found. */ | |
2522 | if (!rdev) | |
2523 | return false; | |
2524 | ||
2525 | sb = page_address(rdev->sb_page); | |
2526 | /* Check if a device has become faulty or a spare become active */ | |
2527 | rdev_for_each(rdev, mddev) { | |
2528 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2529 | /* Device activated? */ | |
2530 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2531 | !test_bit(Faulty, &rdev->flags)) | |
2532 | return true; | |
2533 | /* Device turned faulty? */ | |
2534 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2535 | return true; | |
2536 | } | |
2537 | ||
2538 | /* Check if any mddev parameters have changed */ | |
2539 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2540 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2541 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2542 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2543 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2544 | return true; | |
2545 | ||
2546 | return false; | |
2547 | } | |
2548 | ||
1aee41f6 | 2549 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2550 | { |
3cb03002 | 2551 | struct md_rdev *rdev; |
06d91a5f | 2552 | int sync_req; |
42543769 | 2553 | int nospares = 0; |
2699b672 | 2554 | int any_badblocks_changed = 0; |
23b63f9f | 2555 | int ret = -1; |
1da177e4 | 2556 | |
d87f064f N |
2557 | if (mddev->ro) { |
2558 | if (force_change) | |
2953079c | 2559 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2560 | return; |
2561 | } | |
2aa82191 | 2562 | |
2c97cf13 | 2563 | repeat: |
2aa82191 | 2564 | if (mddev_is_clustered(mddev)) { |
2953079c | 2565 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2566 | force_change = 1; |
2953079c | 2567 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2568 | nospares = 1; |
23b63f9f | 2569 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2570 | /* Has someone else has updated the sb */ |
2571 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2572 | if (ret == 0) |
2573 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2574 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2575 | BIT(MD_SB_CHANGE_DEVS) | | |
2576 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2577 | return; |
2578 | } | |
2579 | } | |
2c97cf13 | 2580 | |
db0505d3 N |
2581 | /* |
2582 | * First make sure individual recovery_offsets are correct | |
2583 | * curr_resync_completed can only be used during recovery. | |
2584 | * During reshape/resync it might use array-addresses rather | |
2585 | * that device addresses. | |
2586 | */ | |
dafb20fa | 2587 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2588 | if (rdev->raid_disk >= 0 && |
2589 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2590 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2591 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2592 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2593 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2594 | !test_bit(In_sync, &rdev->flags) && |
2595 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2596 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2597 | ||
f72ffdd6 | 2598 | } |
bd52b746 | 2599 | if (!mddev->persistent) { |
2953079c SL |
2600 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2601 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2602 | if (!mddev->external) { |
2953079c | 2603 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2604 | rdev_for_each(rdev, mddev) { |
de393cde | 2605 | if (rdev->badblocks.changed) { |
d0962936 | 2606 | rdev->badblocks.changed = 0; |
fc974ee2 | 2607 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2608 | md_error(mddev, rdev); |
2609 | } | |
2610 | clear_bit(Blocked, &rdev->flags); | |
2611 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2612 | wake_up(&rdev->blocked_wait); | |
2613 | } | |
2614 | } | |
3a3a5ddb N |
2615 | wake_up(&mddev->sb_wait); |
2616 | return; | |
2617 | } | |
2618 | ||
85572d7c | 2619 | spin_lock(&mddev->lock); |
84692195 | 2620 | |
9ebc6ef1 | 2621 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2622 | |
2953079c | 2623 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2624 | force_change = 1; |
2953079c | 2625 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2626 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2627 | * though if events isn't the right even/odd, we will have to do | |
2628 | * spares after all | |
2629 | */ | |
2630 | nospares = 1; | |
2631 | if (force_change) | |
2632 | nospares = 0; | |
2633 | if (mddev->degraded) | |
84692195 N |
2634 | /* If the array is degraded, then skipping spares is both |
2635 | * dangerous and fairly pointless. | |
2636 | * Dangerous because a device that was removed from the array | |
2637 | * might have a event_count that still looks up-to-date, | |
2638 | * so it can be re-added without a resync. | |
2639 | * Pointless because if there are any spares to skip, | |
2640 | * then a recovery will happen and soon that array won't | |
2641 | * be degraded any more and the spare can go back to sleep then. | |
2642 | */ | |
850b2b42 | 2643 | nospares = 0; |
84692195 | 2644 | |
06d91a5f | 2645 | sync_req = mddev->in_sync; |
42543769 N |
2646 | |
2647 | /* If this is just a dirty<->clean transition, and the array is clean | |
2648 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2649 | if (nospares |
42543769 | 2650 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2651 | && mddev->can_decrease_events |
2652 | && mddev->events != 1) { | |
42543769 | 2653 | mddev->events--; |
a8707c08 N |
2654 | mddev->can_decrease_events = 0; |
2655 | } else { | |
42543769 N |
2656 | /* otherwise we have to go forward and ... */ |
2657 | mddev->events ++; | |
a8707c08 | 2658 | mddev->can_decrease_events = nospares; |
42543769 | 2659 | } |
1da177e4 | 2660 | |
403df478 N |
2661 | /* |
2662 | * This 64-bit counter should never wrap. | |
2663 | * Either we are in around ~1 trillion A.C., assuming | |
2664 | * 1 reboot per second, or we have a bug... | |
2665 | */ | |
2666 | WARN_ON(mddev->events == 0); | |
2699b672 | 2667 | |
dafb20fa | 2668 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2669 | if (rdev->badblocks.changed) |
2670 | any_badblocks_changed++; | |
de393cde N |
2671 | if (test_bit(Faulty, &rdev->flags)) |
2672 | set_bit(FaultRecorded, &rdev->flags); | |
2673 | } | |
2699b672 | 2674 | |
e691063a | 2675 | sync_sbs(mddev, nospares); |
85572d7c | 2676 | spin_unlock(&mddev->lock); |
1da177e4 | 2677 | |
36a4e1fe N |
2678 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2679 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2680 | |
504634f6 SL |
2681 | if (mddev->queue) |
2682 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2683 | rewrite: |
e64e4018 | 2684 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2685 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2686 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2687 | |
42543769 N |
2688 | if (rdev->sb_loaded != 1) |
2689 | continue; /* no noise on spare devices */ | |
1da177e4 | 2690 | |
f466722c | 2691 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2692 | md_super_write(mddev,rdev, |
0f420358 | 2693 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2694 | rdev->sb_page); |
36a4e1fe N |
2695 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2696 | bdevname(rdev->bdev, b), | |
2697 | (unsigned long long)rdev->sb_start); | |
42543769 | 2698 | rdev->sb_events = mddev->events; |
2699b672 N |
2699 | if (rdev->badblocks.size) { |
2700 | md_super_write(mddev, rdev, | |
2701 | rdev->badblocks.sector, | |
2702 | rdev->badblocks.size << 9, | |
2703 | rdev->bb_page); | |
2704 | rdev->badblocks.size = 0; | |
2705 | } | |
7bfa19f2 | 2706 | |
f466722c | 2707 | } else |
36a4e1fe N |
2708 | pr_debug("md: %s (skipping faulty)\n", |
2709 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2710 | |
7bfa19f2 | 2711 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2712 | /* only need to write one superblock... */ |
2713 | break; | |
2714 | } | |
46533ff7 N |
2715 | if (md_super_wait(mddev) < 0) |
2716 | goto rewrite; | |
2953079c | 2717 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2718 | |
2c97cf13 GJ |
2719 | if (mddev_is_clustered(mddev) && ret == 0) |
2720 | md_cluster_ops->metadata_update_finish(mddev); | |
2721 | ||
850b2b42 | 2722 | if (mddev->in_sync != sync_req || |
2953079c SL |
2723 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2724 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2725 | /* have to write it out again */ |
06d91a5f | 2726 | goto repeat; |
3d310eb7 | 2727 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2728 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2729 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2730 | |
dafb20fa | 2731 | rdev_for_each(rdev, mddev) { |
de393cde N |
2732 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2733 | clear_bit(Blocked, &rdev->flags); | |
2734 | ||
2735 | if (any_badblocks_changed) | |
fc974ee2 | 2736 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2737 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2738 | wake_up(&rdev->blocked_wait); | |
2739 | } | |
1da177e4 | 2740 | } |
1aee41f6 | 2741 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2742 | |
a6da4ef8 GR |
2743 | static int add_bound_rdev(struct md_rdev *rdev) |
2744 | { | |
2745 | struct mddev *mddev = rdev->mddev; | |
2746 | int err = 0; | |
87d4d916 | 2747 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2748 | |
87d4d916 | 2749 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2750 | /* If there is hot_add_disk but no hot_remove_disk |
2751 | * then added disks for geometry changes, | |
2752 | * and should be added immediately. | |
2753 | */ | |
2754 | super_types[mddev->major_version]. | |
2755 | validate_super(mddev, rdev); | |
87d4d916 SL |
2756 | if (add_journal) |
2757 | mddev_suspend(mddev); | |
a6da4ef8 | 2758 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2759 | if (add_journal) |
2760 | mddev_resume(mddev); | |
a6da4ef8 | 2761 | if (err) { |
db767672 | 2762 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2763 | return err; |
2764 | } | |
2765 | } | |
2766 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2767 | ||
2953079c | 2768 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2769 | if (mddev->degraded) |
2770 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2771 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2772 | md_new_event(mddev); | |
2773 | md_wakeup_thread(mddev->thread); | |
2774 | return 0; | |
2775 | } | |
1da177e4 | 2776 | |
7f6ce769 | 2777 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2778 | * We want to accept with case. For this we use cmd_match. |
2779 | */ | |
2780 | static int cmd_match(const char *cmd, const char *str) | |
2781 | { | |
2782 | /* See if cmd, written into a sysfs file, matches | |
2783 | * str. They must either be the same, or cmd can | |
2784 | * have a trailing newline | |
2785 | */ | |
2786 | while (*cmd && *str && *cmd == *str) { | |
2787 | cmd++; | |
2788 | str++; | |
2789 | } | |
2790 | if (*cmd == '\n') | |
2791 | cmd++; | |
2792 | if (*str || *cmd) | |
2793 | return 0; | |
2794 | return 1; | |
2795 | } | |
2796 | ||
86e6ffdd N |
2797 | struct rdev_sysfs_entry { |
2798 | struct attribute attr; | |
3cb03002 N |
2799 | ssize_t (*show)(struct md_rdev *, char *); |
2800 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2801 | }; |
2802 | ||
2803 | static ssize_t | |
3cb03002 | 2804 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2805 | { |
35b785f7 | 2806 | char *sep = ","; |
20a49ff6 | 2807 | size_t len = 0; |
6aa7de05 | 2808 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2809 | |
758bfc8a | 2810 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2811 | (!test_bit(ExternalBbl, &flags) && |
2812 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2813 | len += sprintf(page+len, "faulty%s", sep); |
2814 | if (test_bit(In_sync, &flags)) | |
2815 | len += sprintf(page+len, "in_sync%s", sep); | |
2816 | if (test_bit(Journal, &flags)) | |
2817 | len += sprintf(page+len, "journal%s", sep); | |
2818 | if (test_bit(WriteMostly, &flags)) | |
2819 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2820 | if (test_bit(Blocked, &flags) || |
52c64152 | 2821 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2822 | && !test_bit(Faulty, &flags))) |
2823 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2824 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2825 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2826 | !test_bit(In_sync, &flags)) |
2827 | len += sprintf(page+len, "spare%s", sep); | |
2828 | if (test_bit(WriteErrorSeen, &flags)) | |
2829 | len += sprintf(page+len, "write_error%s", sep); | |
2830 | if (test_bit(WantReplacement, &flags)) | |
2831 | len += sprintf(page+len, "want_replacement%s", sep); | |
2832 | if (test_bit(Replacement, &flags)) | |
2833 | len += sprintf(page+len, "replacement%s", sep); | |
2834 | if (test_bit(ExternalBbl, &flags)) | |
2835 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2836 | if (test_bit(FailFast, &flags)) |
2837 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2838 | |
2839 | if (len) | |
2840 | len -= strlen(sep); | |
2d78f8c4 | 2841 | |
86e6ffdd N |
2842 | return len+sprintf(page+len, "\n"); |
2843 | } | |
2844 | ||
45dc2de1 | 2845 | static ssize_t |
3cb03002 | 2846 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2847 | { |
2848 | /* can write | |
de393cde | 2849 | * faulty - simulates an error |
45dc2de1 | 2850 | * remove - disconnects the device |
f655675b N |
2851 | * writemostly - sets write_mostly |
2852 | * -writemostly - clears write_mostly | |
de393cde N |
2853 | * blocked - sets the Blocked flags |
2854 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2855 | * insync - sets Insync providing device isn't active |
f466722c N |
2856 | * -insync - clear Insync for a device with a slot assigned, |
2857 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2858 | * write_error - sets WriteErrorSeen |
2859 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2860 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2861 | */ |
2862 | int err = -EINVAL; | |
2863 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2864 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2865 | if (test_bit(Faulty, &rdev->flags)) |
2866 | err = 0; | |
2867 | else | |
2868 | err = -EBUSY; | |
45dc2de1 | 2869 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2870 | if (rdev->mddev->pers) { |
2871 | clear_bit(Blocked, &rdev->flags); | |
2872 | remove_and_add_spares(rdev->mddev, rdev); | |
2873 | } | |
45dc2de1 N |
2874 | if (rdev->raid_disk >= 0) |
2875 | err = -EBUSY; | |
2876 | else { | |
fd01b88c | 2877 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2878 | err = 0; |
a9720903 GJ |
2879 | if (mddev_is_clustered(mddev)) |
2880 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2881 | ||
2882 | if (err == 0) { | |
2883 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2884 | if (mddev->pers) { |
2953079c | 2885 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2886 | md_wakeup_thread(mddev->thread); |
2887 | } | |
a9720903 GJ |
2888 | md_new_event(mddev); |
2889 | } | |
45dc2de1 | 2890 | } |
f655675b N |
2891 | } else if (cmd_match(buf, "writemostly")) { |
2892 | set_bit(WriteMostly, &rdev->flags); | |
404659cf | 2893 | mddev_create_serial_pool(rdev->mddev, rdev, false); |
f655675b N |
2894 | err = 0; |
2895 | } else if (cmd_match(buf, "-writemostly")) { | |
404659cf | 2896 | mddev_destroy_serial_pool(rdev->mddev, rdev); |
f655675b | 2897 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
2898 | err = 0; |
2899 | } else if (cmd_match(buf, "blocked")) { | |
2900 | set_bit(Blocked, &rdev->flags); | |
2901 | err = 0; | |
2902 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2903 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2904 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2905 | rdev->badblocks.unacked_exist) { |
de393cde N |
2906 | /* metadata handler doesn't understand badblocks, |
2907 | * so we need to fail the device | |
2908 | */ | |
2909 | md_error(rdev->mddev, rdev); | |
2910 | } | |
6bfe0b49 | 2911 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2912 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2913 | wake_up(&rdev->blocked_wait); |
2914 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2915 | md_wakeup_thread(rdev->mddev->thread); | |
2916 | ||
6d56e278 N |
2917 | err = 0; |
2918 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2919 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2920 | err = 0; |
688834e6 N |
2921 | } else if (cmd_match(buf, "failfast")) { |
2922 | set_bit(FailFast, &rdev->flags); | |
2923 | err = 0; | |
2924 | } else if (cmd_match(buf, "-failfast")) { | |
2925 | clear_bit(FailFast, &rdev->flags); | |
2926 | err = 0; | |
f2076e7d SL |
2927 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2928 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2929 | if (rdev->mddev->pers == NULL) { |
2930 | clear_bit(In_sync, &rdev->flags); | |
2931 | rdev->saved_raid_disk = rdev->raid_disk; | |
2932 | rdev->raid_disk = -1; | |
2933 | err = 0; | |
2934 | } | |
d7a9d443 N |
2935 | } else if (cmd_match(buf, "write_error")) { |
2936 | set_bit(WriteErrorSeen, &rdev->flags); | |
2937 | err = 0; | |
2938 | } else if (cmd_match(buf, "-write_error")) { | |
2939 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2940 | err = 0; | |
2d78f8c4 N |
2941 | } else if (cmd_match(buf, "want_replacement")) { |
2942 | /* Any non-spare device that is not a replacement can | |
2943 | * become want_replacement at any time, but we then need to | |
2944 | * check if recovery is needed. | |
2945 | */ | |
2946 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2947 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2948 | !test_bit(Replacement, &rdev->flags)) |
2949 | set_bit(WantReplacement, &rdev->flags); | |
2950 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2951 | md_wakeup_thread(rdev->mddev->thread); | |
2952 | err = 0; | |
2953 | } else if (cmd_match(buf, "-want_replacement")) { | |
2954 | /* Clearing 'want_replacement' is always allowed. | |
2955 | * Once replacements starts it is too late though. | |
2956 | */ | |
2957 | err = 0; | |
2958 | clear_bit(WantReplacement, &rdev->flags); | |
2959 | } else if (cmd_match(buf, "replacement")) { | |
2960 | /* Can only set a device as a replacement when array has not | |
2961 | * yet been started. Once running, replacement is automatic | |
2962 | * from spares, or by assigning 'slot'. | |
2963 | */ | |
2964 | if (rdev->mddev->pers) | |
2965 | err = -EBUSY; | |
2966 | else { | |
2967 | set_bit(Replacement, &rdev->flags); | |
2968 | err = 0; | |
2969 | } | |
2970 | } else if (cmd_match(buf, "-replacement")) { | |
2971 | /* Similarly, can only clear Replacement before start */ | |
2972 | if (rdev->mddev->pers) | |
2973 | err = -EBUSY; | |
2974 | else { | |
2975 | clear_bit(Replacement, &rdev->flags); | |
2976 | err = 0; | |
2977 | } | |
a6da4ef8 | 2978 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
2979 | if (!rdev->mddev->pers) |
2980 | err = -EINVAL; | |
2981 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
2982 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
2983 | /* clear_bit is performed _after_ all the devices |
2984 | * have their local Faulty bit cleared. If any writes | |
2985 | * happen in the meantime in the local node, they | |
2986 | * will land in the local bitmap, which will be synced | |
2987 | * by this node eventually | |
2988 | */ | |
2989 | if (!mddev_is_clustered(rdev->mddev) || | |
2990 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2991 | clear_bit(Faulty, &rdev->flags); | |
2992 | err = add_bound_rdev(rdev); | |
2993 | } | |
a6da4ef8 GR |
2994 | } else |
2995 | err = -EBUSY; | |
35b785f7 TM |
2996 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2997 | set_bit(ExternalBbl, &rdev->flags); | |
2998 | rdev->badblocks.shift = 0; | |
2999 | err = 0; | |
3000 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
3001 | clear_bit(ExternalBbl, &rdev->flags); | |
3002 | err = 0; | |
45dc2de1 | 3003 | } |
00bcb4ac N |
3004 | if (!err) |
3005 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
3006 | return err ? err : len; |
3007 | } | |
80ca3a44 | 3008 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 3009 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 3010 | |
4dbcdc75 | 3011 | static ssize_t |
3cb03002 | 3012 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
3013 | { |
3014 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
3015 | } | |
3016 | ||
3017 | static ssize_t | |
3cb03002 | 3018 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 3019 | { |
4c9309c0 AD |
3020 | unsigned int n; |
3021 | int rv; | |
3022 | ||
3023 | rv = kstrtouint(buf, 10, &n); | |
3024 | if (rv < 0) | |
3025 | return rv; | |
3026 | atomic_set(&rdev->corrected_errors, n); | |
3027 | return len; | |
4dbcdc75 N |
3028 | } |
3029 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3030 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3031 | |
014236d2 | 3032 | static ssize_t |
3cb03002 | 3033 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3034 | { |
f2076e7d SL |
3035 | if (test_bit(Journal, &rdev->flags)) |
3036 | return sprintf(page, "journal\n"); | |
3037 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3038 | return sprintf(page, "none\n"); |
3039 | else | |
3040 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3041 | } | |
3042 | ||
3043 | static ssize_t | |
3cb03002 | 3044 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3045 | { |
4c9309c0 | 3046 | int slot; |
c303da6d | 3047 | int err; |
4c9309c0 | 3048 | |
f2076e7d SL |
3049 | if (test_bit(Journal, &rdev->flags)) |
3050 | return -EBUSY; | |
014236d2 N |
3051 | if (strncmp(buf, "none", 4)==0) |
3052 | slot = -1; | |
4c9309c0 AD |
3053 | else { |
3054 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3055 | if (err < 0) | |
3056 | return err; | |
3057 | } | |
6c2fce2e | 3058 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3059 | /* Setting 'slot' on an active array requires also |
3060 | * updating the 'rd%d' link, and communicating | |
3061 | * with the personality with ->hot_*_disk. | |
3062 | * For now we only support removing | |
3063 | * failed/spare devices. This normally happens automatically, | |
3064 | * but not when the metadata is externally managed. | |
3065 | */ | |
c303da6d N |
3066 | if (rdev->raid_disk == -1) |
3067 | return -EEXIST; | |
3068 | /* personality does all needed checks */ | |
01393f3d | 3069 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3070 | return -EINVAL; |
746d3207 N |
3071 | clear_bit(Blocked, &rdev->flags); |
3072 | remove_and_add_spares(rdev->mddev, rdev); | |
3073 | if (rdev->raid_disk >= 0) | |
3074 | return -EBUSY; | |
c303da6d N |
3075 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3076 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3077 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3078 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3079 | * if we ever get bitmaps working here. |
6c2fce2e | 3080 | */ |
cb01c549 | 3081 | int err; |
6c2fce2e NB |
3082 | |
3083 | if (rdev->raid_disk != -1) | |
3084 | return -EBUSY; | |
3085 | ||
c6751b2b N |
3086 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3087 | return -EBUSY; | |
3088 | ||
6c2fce2e NB |
3089 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3090 | return -EINVAL; | |
3091 | ||
ba1b41b6 N |
3092 | if (slot >= rdev->mddev->raid_disks && |
3093 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3094 | return -ENOSPC; | |
3095 | ||
6c2fce2e NB |
3096 | rdev->raid_disk = slot; |
3097 | if (test_bit(In_sync, &rdev->flags)) | |
3098 | rdev->saved_raid_disk = slot; | |
3099 | else | |
3100 | rdev->saved_raid_disk = -1; | |
d30519fc | 3101 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3102 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
3103 | err = rdev->mddev->pers-> |
3104 | hot_add_disk(rdev->mddev, rdev); | |
3105 | if (err) { | |
3106 | rdev->raid_disk = -1; | |
3107 | return err; | |
3108 | } else | |
3109 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
3110 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
3111 | /* failure here is OK */; | |
6c2fce2e | 3112 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3113 | } else { |
ba1b41b6 N |
3114 | if (slot >= rdev->mddev->raid_disks && |
3115 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3116 | return -ENOSPC; |
3117 | rdev->raid_disk = slot; | |
3118 | /* assume it is working */ | |
c5d79adb N |
3119 | clear_bit(Faulty, &rdev->flags); |
3120 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3121 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3122 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3123 | } |
014236d2 N |
3124 | return len; |
3125 | } | |
3126 | ||
014236d2 | 3127 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3128 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3129 | |
93c8cad0 | 3130 | static ssize_t |
3cb03002 | 3131 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3132 | { |
6961ece4 | 3133 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3134 | } |
3135 | ||
3136 | static ssize_t | |
3cb03002 | 3137 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3138 | { |
c6563a8c | 3139 | unsigned long long offset; |
b29bebd6 | 3140 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3141 | return -EINVAL; |
8ed0a521 | 3142 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3143 | return -EBUSY; |
dd8ac336 | 3144 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3145 | /* Must set offset before size, so overlap checks |
3146 | * can be sane */ | |
3147 | return -EBUSY; | |
93c8cad0 | 3148 | rdev->data_offset = offset; |
25f7fd47 | 3149 | rdev->new_data_offset = offset; |
93c8cad0 N |
3150 | return len; |
3151 | } | |
3152 | ||
3153 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3154 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3155 | |
c6563a8c N |
3156 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3157 | { | |
3158 | return sprintf(page, "%llu\n", | |
3159 | (unsigned long long)rdev->new_data_offset); | |
3160 | } | |
3161 | ||
3162 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3163 | const char *buf, size_t len) | |
3164 | { | |
3165 | unsigned long long new_offset; | |
3166 | struct mddev *mddev = rdev->mddev; | |
3167 | ||
b29bebd6 | 3168 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3169 | return -EINVAL; |
3170 | ||
f851b60d N |
3171 | if (mddev->sync_thread || |
3172 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3173 | return -EBUSY; |
3174 | if (new_offset == rdev->data_offset) | |
3175 | /* reset is always permitted */ | |
3176 | ; | |
3177 | else if (new_offset > rdev->data_offset) { | |
3178 | /* must not push array size beyond rdev_sectors */ | |
3179 | if (new_offset - rdev->data_offset | |
3180 | + mddev->dev_sectors > rdev->sectors) | |
3181 | return -E2BIG; | |
3182 | } | |
3183 | /* Metadata worries about other space details. */ | |
3184 | ||
3185 | /* decreasing the offset is inconsistent with a backwards | |
3186 | * reshape. | |
3187 | */ | |
3188 | if (new_offset < rdev->data_offset && | |
3189 | mddev->reshape_backwards) | |
3190 | return -EINVAL; | |
3191 | /* Increasing offset is inconsistent with forwards | |
3192 | * reshape. reshape_direction should be set to | |
3193 | * 'backwards' first. | |
3194 | */ | |
3195 | if (new_offset > rdev->data_offset && | |
3196 | !mddev->reshape_backwards) | |
3197 | return -EINVAL; | |
3198 | ||
3199 | if (mddev->pers && mddev->persistent && | |
3200 | !super_types[mddev->major_version] | |
3201 | .allow_new_offset(rdev, new_offset)) | |
3202 | return -E2BIG; | |
3203 | rdev->new_data_offset = new_offset; | |
3204 | if (new_offset > rdev->data_offset) | |
3205 | mddev->reshape_backwards = 1; | |
3206 | else if (new_offset < rdev->data_offset) | |
3207 | mddev->reshape_backwards = 0; | |
3208 | ||
3209 | return len; | |
3210 | } | |
3211 | static struct rdev_sysfs_entry rdev_new_offset = | |
3212 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3213 | ||
83303b61 | 3214 | static ssize_t |
3cb03002 | 3215 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3216 | { |
dd8ac336 | 3217 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3218 | } |
3219 | ||
c5d79adb N |
3220 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3221 | { | |
3222 | /* check if two start/length pairs overlap */ | |
3223 | if (s1+l1 <= s2) | |
3224 | return 0; | |
3225 | if (s2+l2 <= s1) | |
3226 | return 0; | |
3227 | return 1; | |
3228 | } | |
3229 | ||
b522adcd DW |
3230 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3231 | { | |
3232 | unsigned long long blocks; | |
3233 | sector_t new; | |
3234 | ||
b29bebd6 | 3235 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3236 | return -EINVAL; |
3237 | ||
3238 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3239 | return -EINVAL; /* sector conversion overflow */ | |
3240 | ||
3241 | new = blocks * 2; | |
3242 | if (new != blocks * 2) | |
3243 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3244 | ||
3245 | *sectors = new; | |
3246 | return 0; | |
3247 | } | |
3248 | ||
83303b61 | 3249 | static ssize_t |
3cb03002 | 3250 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3251 | { |
fd01b88c | 3252 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3253 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3254 | sector_t sectors; |
27c529bb | 3255 | |
f2076e7d SL |
3256 | if (test_bit(Journal, &rdev->flags)) |
3257 | return -EBUSY; | |
b522adcd | 3258 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3259 | return -EINVAL; |
c6563a8c N |
3260 | if (rdev->data_offset != rdev->new_data_offset) |
3261 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3262 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3263 | if (my_mddev->persistent) { |
dd8ac336 AN |
3264 | sectors = super_types[my_mddev->major_version]. |
3265 | rdev_size_change(rdev, sectors); | |
3266 | if (!sectors) | |
0cd17fec | 3267 | return -EBUSY; |
dd8ac336 | 3268 | } else if (!sectors) |
77304d2a | 3269 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3270 | rdev->data_offset; |
a6468539 N |
3271 | if (!my_mddev->pers->resize) |
3272 | /* Cannot change size for RAID0 or Linear etc */ | |
3273 | return -EINVAL; | |
0cd17fec | 3274 | } |
dd8ac336 | 3275 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3276 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3277 | |
dd8ac336 AN |
3278 | rdev->sectors = sectors; |
3279 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3280 | /* Need to check that all other rdevs with the same |
3281 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3282 | * the rdev lists safely. | |
3283 | * This check does not provide a hard guarantee, it | |
3284 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3285 | */ |
fd01b88c | 3286 | struct mddev *mddev; |
c5d79adb | 3287 | int overlap = 0; |
159ec1fc | 3288 | struct list_head *tmp; |
c5d79adb | 3289 | |
8b1afc3d | 3290 | rcu_read_lock(); |
29ac4aa3 | 3291 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3292 | struct md_rdev *rdev2; |
c5d79adb | 3293 | |
dafb20fa | 3294 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3295 | if (rdev->bdev == rdev2->bdev && |
3296 | rdev != rdev2 && | |
3297 | overlaps(rdev->data_offset, rdev->sectors, | |
3298 | rdev2->data_offset, | |
3299 | rdev2->sectors)) { | |
c5d79adb N |
3300 | overlap = 1; |
3301 | break; | |
3302 | } | |
c5d79adb N |
3303 | if (overlap) { |
3304 | mddev_put(mddev); | |
3305 | break; | |
3306 | } | |
3307 | } | |
8b1afc3d | 3308 | rcu_read_unlock(); |
c5d79adb N |
3309 | if (overlap) { |
3310 | /* Someone else could have slipped in a size | |
3311 | * change here, but doing so is just silly. | |
dd8ac336 | 3312 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3313 | * safe, and trust userspace not to race with |
3314 | * itself | |
3315 | */ | |
dd8ac336 | 3316 | rdev->sectors = oldsectors; |
c5d79adb N |
3317 | return -EBUSY; |
3318 | } | |
3319 | } | |
83303b61 N |
3320 | return len; |
3321 | } | |
3322 | ||
3323 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3324 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3325 | |
3cb03002 | 3326 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3327 | { |
3328 | unsigned long long recovery_start = rdev->recovery_offset; | |
3329 | ||
3330 | if (test_bit(In_sync, &rdev->flags) || | |
3331 | recovery_start == MaxSector) | |
3332 | return sprintf(page, "none\n"); | |
3333 | ||
3334 | return sprintf(page, "%llu\n", recovery_start); | |
3335 | } | |
3336 | ||
3cb03002 | 3337 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3338 | { |
3339 | unsigned long long recovery_start; | |
3340 | ||
3341 | if (cmd_match(buf, "none")) | |
3342 | recovery_start = MaxSector; | |
b29bebd6 | 3343 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3344 | return -EINVAL; |
3345 | ||
3346 | if (rdev->mddev->pers && | |
3347 | rdev->raid_disk >= 0) | |
3348 | return -EBUSY; | |
3349 | ||
3350 | rdev->recovery_offset = recovery_start; | |
3351 | if (recovery_start == MaxSector) | |
3352 | set_bit(In_sync, &rdev->flags); | |
3353 | else | |
3354 | clear_bit(In_sync, &rdev->flags); | |
3355 | return len; | |
3356 | } | |
3357 | ||
3358 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3359 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3360 | ||
fc974ee2 VV |
3361 | /* sysfs access to bad-blocks list. |
3362 | * We present two files. | |
3363 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3364 | * are recorded as bad. The list is truncated to fit within | |
3365 | * the one-page limit of sysfs. | |
3366 | * Writing "sector length" to this file adds an acknowledged | |
3367 | * bad block list. | |
3368 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3369 | * been acknowledged. Writing to this file adds bad blocks | |
3370 | * without acknowledging them. This is largely for testing. | |
3371 | */ | |
3cb03002 | 3372 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3373 | { |
3374 | return badblocks_show(&rdev->badblocks, page, 0); | |
3375 | } | |
3cb03002 | 3376 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3377 | { |
de393cde N |
3378 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3379 | /* Maybe that ack was all we needed */ | |
3380 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3381 | wake_up(&rdev->blocked_wait); | |
3382 | return rv; | |
16c791a5 N |
3383 | } |
3384 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3385 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3386 | ||
3cb03002 | 3387 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3388 | { |
3389 | return badblocks_show(&rdev->badblocks, page, 1); | |
3390 | } | |
3cb03002 | 3391 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3392 | { |
3393 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3394 | } | |
3395 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3396 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3397 | ||
664aed04 AP |
3398 | static ssize_t |
3399 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3400 | { | |
3401 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3402 | } | |
3403 | ||
3404 | static ssize_t | |
3405 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3406 | { | |
3407 | unsigned long long sector; | |
3408 | ||
3409 | if (kstrtoull(buf, 10, §or) < 0) | |
3410 | return -EINVAL; | |
3411 | if (sector != (sector_t)sector) | |
3412 | return -EINVAL; | |
3413 | ||
3414 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3415 | rdev->raid_disk >= 0) | |
3416 | return -EBUSY; | |
3417 | ||
3418 | if (rdev->mddev->persistent) { | |
3419 | if (rdev->mddev->major_version == 0) | |
3420 | return -EINVAL; | |
3421 | if ((sector > rdev->sb_start && | |
3422 | sector - rdev->sb_start > S16_MAX) || | |
3423 | (sector < rdev->sb_start && | |
3424 | rdev->sb_start - sector > -S16_MIN)) | |
3425 | return -EINVAL; | |
3426 | rdev->ppl.offset = sector - rdev->sb_start; | |
3427 | } else if (!rdev->mddev->external) { | |
3428 | return -EBUSY; | |
3429 | } | |
3430 | rdev->ppl.sector = sector; | |
3431 | return len; | |
3432 | } | |
3433 | ||
3434 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3435 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3436 | ||
3437 | static ssize_t | |
3438 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3439 | { | |
3440 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3441 | } | |
3442 | ||
3443 | static ssize_t | |
3444 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3445 | { | |
3446 | unsigned int size; | |
3447 | ||
3448 | if (kstrtouint(buf, 10, &size) < 0) | |
3449 | return -EINVAL; | |
3450 | ||
3451 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3452 | rdev->raid_disk >= 0) | |
3453 | return -EBUSY; | |
3454 | ||
3455 | if (rdev->mddev->persistent) { | |
3456 | if (rdev->mddev->major_version == 0) | |
3457 | return -EINVAL; | |
3458 | if (size > U16_MAX) | |
3459 | return -EINVAL; | |
3460 | } else if (!rdev->mddev->external) { | |
3461 | return -EBUSY; | |
3462 | } | |
3463 | rdev->ppl.size = size; | |
3464 | return len; | |
3465 | } | |
3466 | ||
3467 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3468 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3469 | ||
86e6ffdd N |
3470 | static struct attribute *rdev_default_attrs[] = { |
3471 | &rdev_state.attr, | |
4dbcdc75 | 3472 | &rdev_errors.attr, |
014236d2 | 3473 | &rdev_slot.attr, |
93c8cad0 | 3474 | &rdev_offset.attr, |
c6563a8c | 3475 | &rdev_new_offset.attr, |
83303b61 | 3476 | &rdev_size.attr, |
06e3c817 | 3477 | &rdev_recovery_start.attr, |
16c791a5 N |
3478 | &rdev_bad_blocks.attr, |
3479 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3480 | &rdev_ppl_sector.attr, |
3481 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3482 | NULL, |
3483 | }; | |
3484 | static ssize_t | |
3485 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3486 | { | |
3487 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3488 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3489 | |
3490 | if (!entry->show) | |
3491 | return -EIO; | |
758bfc8a | 3492 | if (!rdev->mddev) |
168b305b | 3493 | return -ENODEV; |
758bfc8a | 3494 | return entry->show(rdev, page); |
86e6ffdd N |
3495 | } |
3496 | ||
3497 | static ssize_t | |
3498 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3499 | const char *page, size_t length) | |
3500 | { | |
3501 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3502 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3503 | ssize_t rv; |
fd01b88c | 3504 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3505 | |
3506 | if (!entry->store) | |
3507 | return -EIO; | |
67463acb N |
3508 | if (!capable(CAP_SYS_ADMIN)) |
3509 | return -EACCES; | |
c42d3240 | 3510 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3511 | if (!rv) { |
27c529bb | 3512 | if (rdev->mddev == NULL) |
c42d3240 | 3513 | rv = -ENODEV; |
27c529bb N |
3514 | else |
3515 | rv = entry->store(rdev, page, length); | |
6a51830e | 3516 | mddev_unlock(mddev); |
ca388059 N |
3517 | } |
3518 | return rv; | |
86e6ffdd N |
3519 | } |
3520 | ||
3521 | static void rdev_free(struct kobject *ko) | |
3522 | { | |
3cb03002 | 3523 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3524 | kfree(rdev); |
3525 | } | |
52cf25d0 | 3526 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3527 | .show = rdev_attr_show, |
3528 | .store = rdev_attr_store, | |
3529 | }; | |
3530 | static struct kobj_type rdev_ktype = { | |
3531 | .release = rdev_free, | |
3532 | .sysfs_ops = &rdev_sysfs_ops, | |
3533 | .default_attrs = rdev_default_attrs, | |
3534 | }; | |
3535 | ||
3cb03002 | 3536 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3537 | { |
3538 | rdev->desc_nr = -1; | |
3539 | rdev->saved_raid_disk = -1; | |
3540 | rdev->raid_disk = -1; | |
3541 | rdev->flags = 0; | |
3542 | rdev->data_offset = 0; | |
c6563a8c | 3543 | rdev->new_data_offset = 0; |
e8bb9a83 | 3544 | rdev->sb_events = 0; |
0e3ef49e | 3545 | rdev->last_read_error = 0; |
2699b672 N |
3546 | rdev->sb_loaded = 0; |
3547 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3548 | atomic_set(&rdev->nr_pending, 0); |
3549 | atomic_set(&rdev->read_errors, 0); | |
3550 | atomic_set(&rdev->corrected_errors, 0); | |
3551 | ||
3552 | INIT_LIST_HEAD(&rdev->same_set); | |
3553 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3554 | |
3555 | /* Add space to store bad block list. | |
3556 | * This reserves the space even on arrays where it cannot | |
3557 | * be used - I wonder if that matters | |
3558 | */ | |
fc974ee2 | 3559 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3560 | } |
3561 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3562 | /* |
3563 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3564 | * | |
3565 | * mark the device faulty if: | |
3566 | * | |
3567 | * - the device is nonexistent (zero size) | |
3568 | * - the device has no valid superblock | |
3569 | * | |
3570 | * a faulty rdev _never_ has rdev->sb set. | |
3571 | */ | |
3cb03002 | 3572 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3573 | { |
3574 | char b[BDEVNAME_SIZE]; | |
3575 | int err; | |
3cb03002 | 3576 | struct md_rdev *rdev; |
1da177e4 LT |
3577 | sector_t size; |
3578 | ||
9ffae0cf | 3579 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3580 | if (!rdev) |
1da177e4 | 3581 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3582 | |
2230dfe4 N |
3583 | err = md_rdev_init(rdev); |
3584 | if (err) | |
3585 | goto abort_free; | |
3586 | err = alloc_disk_sb(rdev); | |
3587 | if (err) | |
1da177e4 LT |
3588 | goto abort_free; |
3589 | ||
c5d79adb | 3590 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3591 | if (err) |
3592 | goto abort_free; | |
3593 | ||
f9cb074b | 3594 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3595 | |
77304d2a | 3596 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3597 | if (!size) { |
9d48739e | 3598 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3599 | bdevname(rdev->bdev,b)); |
3600 | err = -EINVAL; | |
3601 | goto abort_free; | |
3602 | } | |
3603 | ||
3604 | if (super_format >= 0) { | |
3605 | err = super_types[super_format]. | |
3606 | load_super(rdev, NULL, super_minor); | |
3607 | if (err == -EINVAL) { | |
9d48739e | 3608 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3609 | bdevname(rdev->bdev,b), |
9d48739e | 3610 | super_format, super_minor); |
1da177e4 LT |
3611 | goto abort_free; |
3612 | } | |
3613 | if (err < 0) { | |
9d48739e | 3614 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3615 | bdevname(rdev->bdev,b)); |
3616 | goto abort_free; | |
3617 | } | |
3618 | } | |
6bfe0b49 | 3619 | |
1da177e4 LT |
3620 | return rdev; |
3621 | ||
3622 | abort_free: | |
2699b672 N |
3623 | if (rdev->bdev) |
3624 | unlock_rdev(rdev); | |
545c8795 | 3625 | md_rdev_clear(rdev); |
1da177e4 LT |
3626 | kfree(rdev); |
3627 | return ERR_PTR(err); | |
3628 | } | |
3629 | ||
3630 | /* | |
3631 | * Check a full RAID array for plausibility | |
3632 | */ | |
3633 | ||
6a5cb53a | 3634 | static int analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3635 | { |
3636 | int i; | |
3cb03002 | 3637 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3638 | char b[BDEVNAME_SIZE]; |
3639 | ||
3640 | freshest = NULL; | |
dafb20fa | 3641 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3642 | switch (super_types[mddev->major_version]. |
3643 | load_super(rdev, freshest, mddev->minor_version)) { | |
3644 | case 1: | |
3645 | freshest = rdev; | |
3646 | break; | |
3647 | case 0: | |
3648 | break; | |
3649 | default: | |
9d48739e | 3650 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3651 | bdevname(rdev->bdev,b)); |
fb56dfef | 3652 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3653 | } |
3654 | ||
6a5cb53a YY |
3655 | /* Cannot find a valid fresh disk */ |
3656 | if (!freshest) { | |
3657 | pr_warn("md: cannot find a valid disk\n"); | |
3658 | return -EINVAL; | |
3659 | } | |
3660 | ||
1da177e4 LT |
3661 | super_types[mddev->major_version]. |
3662 | validate_super(mddev, freshest); | |
3663 | ||
3664 | i = 0; | |
dafb20fa | 3665 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3666 | if (mddev->max_disks && |
3667 | (rdev->desc_nr >= mddev->max_disks || | |
3668 | i > mddev->max_disks)) { | |
9d48739e N |
3669 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3670 | mdname(mddev), bdevname(rdev->bdev, b), | |
3671 | mddev->max_disks); | |
fb56dfef | 3672 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3673 | continue; |
3674 | } | |
1aee41f6 | 3675 | if (rdev != freshest) { |
1da177e4 LT |
3676 | if (super_types[mddev->major_version]. |
3677 | validate_super(mddev, rdev)) { | |
9d48739e | 3678 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3679 | bdevname(rdev->bdev,b)); |
fb56dfef | 3680 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3681 | continue; |
3682 | } | |
1aee41f6 | 3683 | } |
1da177e4 LT |
3684 | if (mddev->level == LEVEL_MULTIPATH) { |
3685 | rdev->desc_nr = i++; | |
3686 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3687 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3688 | } else if (rdev->raid_disk >= |
3689 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3690 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3691 | rdev->raid_disk = -1; |
3692 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3693 | } |
3694 | } | |
6a5cb53a YY |
3695 | |
3696 | return 0; | |
1da177e4 LT |
3697 | } |
3698 | ||
72e02075 N |
3699 | /* Read a fixed-point number. |
3700 | * Numbers in sysfs attributes should be in "standard" units where | |
3701 | * possible, so time should be in seconds. | |
f72ffdd6 | 3702 | * However we internally use a a much smaller unit such as |
72e02075 N |
3703 | * milliseconds or jiffies. |
3704 | * This function takes a decimal number with a possible fractional | |
3705 | * component, and produces an integer which is the result of | |
3706 | * multiplying that number by 10^'scale'. | |
3707 | * all without any floating-point arithmetic. | |
3708 | */ | |
3709 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3710 | { | |
3711 | unsigned long result = 0; | |
3712 | long decimals = -1; | |
3713 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3714 | if (*cp == '.') | |
3715 | decimals = 0; | |
3716 | else if (decimals < scale) { | |
3717 | unsigned int value; | |
3718 | value = *cp - '0'; | |
3719 | result = result * 10 + value; | |
3720 | if (decimals >= 0) | |
3721 | decimals++; | |
3722 | } | |
3723 | cp++; | |
3724 | } | |
3725 | if (*cp == '\n') | |
3726 | cp++; | |
3727 | if (*cp) | |
3728 | return -EINVAL; | |
3729 | if (decimals < 0) | |
3730 | decimals = 0; | |
cf891607 | 3731 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3732 | return 0; |
3733 | } | |
3734 | ||
16f17b39 | 3735 | static ssize_t |
fd01b88c | 3736 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3737 | { |
3738 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3739 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3740 | } | |
3741 | static ssize_t | |
fd01b88c | 3742 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3743 | { |
16f17b39 | 3744 | unsigned long msec; |
97ce0a7f | 3745 | |
28c1b9fd | 3746 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3747 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3748 | return -EINVAL; |
3749 | } | |
3750 | ||
72e02075 | 3751 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3752 | return -EINVAL; |
16f17b39 N |
3753 | if (msec == 0) |
3754 | mddev->safemode_delay = 0; | |
3755 | else { | |
19052c0e | 3756 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3757 | unsigned long new_delay = (msec*HZ)/1000; |
3758 | ||
3759 | if (new_delay == 0) | |
3760 | new_delay = 1; | |
3761 | mddev->safemode_delay = new_delay; | |
3762 | if (new_delay < old_delay || old_delay == 0) | |
3763 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3764 | } |
3765 | return len; | |
3766 | } | |
3767 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3768 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3769 | |
eae1701f | 3770 | static ssize_t |
fd01b88c | 3771 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3772 | { |
36d091f4 N |
3773 | struct md_personality *p; |
3774 | int ret; | |
3775 | spin_lock(&mddev->lock); | |
3776 | p = mddev->pers; | |
d9d166c2 | 3777 | if (p) |
36d091f4 | 3778 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3779 | else if (mddev->clevel[0]) |
36d091f4 | 3780 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3781 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3782 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3783 | else |
36d091f4 N |
3784 | ret = 0; |
3785 | spin_unlock(&mddev->lock); | |
3786 | return ret; | |
eae1701f N |
3787 | } |
3788 | ||
d9d166c2 | 3789 | static ssize_t |
fd01b88c | 3790 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3791 | { |
f2859af6 | 3792 | char clevel[16]; |
6791875e N |
3793 | ssize_t rv; |
3794 | size_t slen = len; | |
db721d32 | 3795 | struct md_personality *pers, *oldpers; |
f2859af6 | 3796 | long level; |
db721d32 | 3797 | void *priv, *oldpriv; |
3cb03002 | 3798 | struct md_rdev *rdev; |
245f46c2 | 3799 | |
6791875e N |
3800 | if (slen == 0 || slen >= sizeof(clevel)) |
3801 | return -EINVAL; | |
3802 | ||
3803 | rv = mddev_lock(mddev); | |
3804 | if (rv) | |
3805 | return rv; | |
3806 | ||
245f46c2 | 3807 | if (mddev->pers == NULL) { |
6791875e N |
3808 | strncpy(mddev->clevel, buf, slen); |
3809 | if (mddev->clevel[slen-1] == '\n') | |
3810 | slen--; | |
3811 | mddev->clevel[slen] = 0; | |
245f46c2 | 3812 | mddev->level = LEVEL_NONE; |
6791875e N |
3813 | rv = len; |
3814 | goto out_unlock; | |
245f46c2 | 3815 | } |
6791875e | 3816 | rv = -EROFS; |
bd8839e0 | 3817 | if (mddev->ro) |
6791875e | 3818 | goto out_unlock; |
245f46c2 N |
3819 | |
3820 | /* request to change the personality. Need to ensure: | |
3821 | * - array is not engaged in resync/recovery/reshape | |
3822 | * - old personality can be suspended | |
3823 | * - new personality will access other array. | |
3824 | */ | |
3825 | ||
6791875e | 3826 | rv = -EBUSY; |
bb4f1e9d | 3827 | if (mddev->sync_thread || |
f851b60d | 3828 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3829 | mddev->reshape_position != MaxSector || |
3830 | mddev->sysfs_active) | |
6791875e | 3831 | goto out_unlock; |
245f46c2 | 3832 | |
6791875e | 3833 | rv = -EINVAL; |
245f46c2 | 3834 | if (!mddev->pers->quiesce) { |
9d48739e N |
3835 | pr_warn("md: %s: %s does not support online personality change\n", |
3836 | mdname(mddev), mddev->pers->name); | |
6791875e | 3837 | goto out_unlock; |
245f46c2 N |
3838 | } |
3839 | ||
3840 | /* Now find the new personality */ | |
6791875e N |
3841 | strncpy(clevel, buf, slen); |
3842 | if (clevel[slen-1] == '\n') | |
3843 | slen--; | |
3844 | clevel[slen] = 0; | |
b29bebd6 | 3845 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3846 | level = LEVEL_NONE; |
245f46c2 | 3847 | |
f2859af6 DW |
3848 | if (request_module("md-%s", clevel) != 0) |
3849 | request_module("md-level-%s", clevel); | |
245f46c2 | 3850 | spin_lock(&pers_lock); |
f2859af6 | 3851 | pers = find_pers(level, clevel); |
245f46c2 N |
3852 | if (!pers || !try_module_get(pers->owner)) { |
3853 | spin_unlock(&pers_lock); | |
9d48739e | 3854 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3855 | rv = -EINVAL; |
3856 | goto out_unlock; | |
245f46c2 N |
3857 | } |
3858 | spin_unlock(&pers_lock); | |
3859 | ||
3860 | if (pers == mddev->pers) { | |
3861 | /* Nothing to do! */ | |
3862 | module_put(pers->owner); | |
6791875e N |
3863 | rv = len; |
3864 | goto out_unlock; | |
245f46c2 N |
3865 | } |
3866 | if (!pers->takeover) { | |
3867 | module_put(pers->owner); | |
9d48739e N |
3868 | pr_warn("md: %s: %s does not support personality takeover\n", |
3869 | mdname(mddev), clevel); | |
6791875e N |
3870 | rv = -EINVAL; |
3871 | goto out_unlock; | |
245f46c2 N |
3872 | } |
3873 | ||
dafb20fa | 3874 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3875 | rdev->new_raid_disk = rdev->raid_disk; |
3876 | ||
245f46c2 N |
3877 | /* ->takeover must set new_* and/or delta_disks |
3878 | * if it succeeds, and may set them when it fails. | |
3879 | */ | |
3880 | priv = pers->takeover(mddev); | |
3881 | if (IS_ERR(priv)) { | |
3882 | mddev->new_level = mddev->level; | |
3883 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3884 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3885 | mddev->raid_disks -= mddev->delta_disks; |
3886 | mddev->delta_disks = 0; | |
2c810cdd | 3887 | mddev->reshape_backwards = 0; |
245f46c2 | 3888 | module_put(pers->owner); |
9d48739e N |
3889 | pr_warn("md: %s: %s would not accept array\n", |
3890 | mdname(mddev), clevel); | |
6791875e N |
3891 | rv = PTR_ERR(priv); |
3892 | goto out_unlock; | |
245f46c2 N |
3893 | } |
3894 | ||
3895 | /* Looks like we have a winner */ | |
3896 | mddev_suspend(mddev); | |
5aa61f42 | 3897 | mddev_detach(mddev); |
36d091f4 N |
3898 | |
3899 | spin_lock(&mddev->lock); | |
db721d32 N |
3900 | oldpers = mddev->pers; |
3901 | oldpriv = mddev->private; | |
3902 | mddev->pers = pers; | |
3903 | mddev->private = priv; | |
3904 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3905 | mddev->level = mddev->new_level; | |
3906 | mddev->layout = mddev->new_layout; | |
3907 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3908 | mddev->delta_disks = 0; | |
3909 | mddev->reshape_backwards = 0; | |
3910 | mddev->degraded = 0; | |
36d091f4 | 3911 | spin_unlock(&mddev->lock); |
db721d32 N |
3912 | |
3913 | if (oldpers->sync_request == NULL && | |
3914 | mddev->external) { | |
3915 | /* We are converting from a no-redundancy array | |
3916 | * to a redundancy array and metadata is managed | |
3917 | * externally so we need to be sure that writes | |
3918 | * won't block due to a need to transition | |
3919 | * clean->dirty | |
3920 | * until external management is started. | |
3921 | */ | |
3922 | mddev->in_sync = 0; | |
3923 | mddev->safemode_delay = 0; | |
3924 | mddev->safemode = 0; | |
3925 | } | |
f72ffdd6 | 3926 | |
db721d32 N |
3927 | oldpers->free(mddev, oldpriv); |
3928 | ||
3929 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3930 | pers->sync_request != NULL) { |
3931 | /* need to add the md_redundancy_group */ | |
3932 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3933 | pr_warn("md: cannot register extra attributes for %s\n", |
3934 | mdname(mddev)); | |
388975cc | 3935 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3936 | } |
db721d32 | 3937 | if (oldpers->sync_request != NULL && |
a64c876f N |
3938 | pers->sync_request == NULL) { |
3939 | /* need to remove the md_redundancy_group */ | |
3940 | if (mddev->to_remove == NULL) | |
3941 | mddev->to_remove = &md_redundancy_group; | |
3942 | } | |
3943 | ||
4cb9da7d AO |
3944 | module_put(oldpers->owner); |
3945 | ||
dafb20fa | 3946 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3947 | if (rdev->raid_disk < 0) |
3948 | continue; | |
bf2cb0da | 3949 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3950 | rdev->new_raid_disk = -1; |
3951 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3952 | continue; | |
36fad858 | 3953 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3954 | } |
dafb20fa | 3955 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3956 | if (rdev->raid_disk < 0) |
3957 | continue; | |
3958 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3959 | continue; | |
3960 | rdev->raid_disk = rdev->new_raid_disk; | |
3961 | if (rdev->raid_disk < 0) | |
3a981b03 | 3962 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3963 | else { |
36fad858 | 3964 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3965 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3966 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3967 | } |
e93f68a1 N |
3968 | } |
3969 | ||
db721d32 | 3970 | if (pers->sync_request == NULL) { |
9af204cf TM |
3971 | /* this is now an array without redundancy, so |
3972 | * it must always be in_sync | |
3973 | */ | |
3974 | mddev->in_sync = 1; | |
3975 | del_timer_sync(&mddev->safemode_timer); | |
3976 | } | |
02e5f5c0 | 3977 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3978 | pers->run(mddev); |
2953079c | 3979 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3980 | mddev_resume(mddev); |
830778a1 N |
3981 | if (!mddev->thread) |
3982 | md_update_sb(mddev, 1); | |
5cac7861 | 3983 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3984 | md_new_event(mddev); |
6791875e N |
3985 | rv = len; |
3986 | out_unlock: | |
3987 | mddev_unlock(mddev); | |
d9d166c2 N |
3988 | return rv; |
3989 | } | |
3990 | ||
3991 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3992 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3993 | |
d4dbd025 | 3994 | static ssize_t |
fd01b88c | 3995 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3996 | { |
3997 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3998 | if (mddev->reshape_position != MaxSector && |
3999 | mddev->layout != mddev->new_layout) | |
4000 | return sprintf(page, "%d (%d)\n", | |
4001 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
4002 | return sprintf(page, "%d\n", mddev->layout); |
4003 | } | |
4004 | ||
4005 | static ssize_t | |
fd01b88c | 4006 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 4007 | { |
4c9309c0 | 4008 | unsigned int n; |
6791875e | 4009 | int err; |
d4dbd025 | 4010 | |
4c9309c0 AD |
4011 | err = kstrtouint(buf, 10, &n); |
4012 | if (err < 0) | |
4013 | return err; | |
6791875e N |
4014 | err = mddev_lock(mddev); |
4015 | if (err) | |
4016 | return err; | |
d4dbd025 | 4017 | |
b3546035 | 4018 | if (mddev->pers) { |
50ac168a | 4019 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4020 | err = -EBUSY; |
4021 | else if (mddev->ro) | |
4022 | err = -EROFS; | |
4023 | else { | |
4024 | mddev->new_layout = n; | |
4025 | err = mddev->pers->check_reshape(mddev); | |
4026 | if (err) | |
4027 | mddev->new_layout = mddev->layout; | |
597a711b | 4028 | } |
b3546035 | 4029 | } else { |
08a02ecd | 4030 | mddev->new_layout = n; |
b3546035 N |
4031 | if (mddev->reshape_position == MaxSector) |
4032 | mddev->layout = n; | |
4033 | } | |
6791875e N |
4034 | mddev_unlock(mddev); |
4035 | return err ?: len; | |
d4dbd025 N |
4036 | } |
4037 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4038 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4039 | |
eae1701f | 4040 | static ssize_t |
fd01b88c | 4041 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4042 | { |
bb636547 N |
4043 | if (mddev->raid_disks == 0) |
4044 | return 0; | |
08a02ecd N |
4045 | if (mddev->reshape_position != MaxSector && |
4046 | mddev->delta_disks != 0) | |
4047 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4048 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4049 | return sprintf(page, "%d\n", mddev->raid_disks); |
4050 | } | |
4051 | ||
fd01b88c | 4052 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4053 | |
4054 | static ssize_t | |
fd01b88c | 4055 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4056 | { |
4c9309c0 | 4057 | unsigned int n; |
6791875e | 4058 | int err; |
da943b99 | 4059 | |
4c9309c0 AD |
4060 | err = kstrtouint(buf, 10, &n); |
4061 | if (err < 0) | |
4062 | return err; | |
da943b99 | 4063 | |
6791875e N |
4064 | err = mddev_lock(mddev); |
4065 | if (err) | |
4066 | return err; | |
da943b99 | 4067 | if (mddev->pers) |
6791875e | 4068 | err = update_raid_disks(mddev, n); |
08a02ecd | 4069 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4070 | struct md_rdev *rdev; |
08a02ecd | 4071 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4072 | |
6791875e | 4073 | err = -EINVAL; |
c6563a8c N |
4074 | rdev_for_each(rdev, mddev) { |
4075 | if (olddisks < n && | |
4076 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4077 | goto out_unlock; |
c6563a8c N |
4078 | if (olddisks > n && |
4079 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4080 | goto out_unlock; |
c6563a8c | 4081 | } |
6791875e | 4082 | err = 0; |
08a02ecd N |
4083 | mddev->delta_disks = n - olddisks; |
4084 | mddev->raid_disks = n; | |
2c810cdd | 4085 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4086 | } else |
da943b99 | 4087 | mddev->raid_disks = n; |
6791875e N |
4088 | out_unlock: |
4089 | mddev_unlock(mddev); | |
4090 | return err ? err : len; | |
da943b99 N |
4091 | } |
4092 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4093 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4094 | |
3b34380a | 4095 | static ssize_t |
fd01b88c | 4096 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4097 | { |
08a02ecd | 4098 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4099 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4100 | return sprintf(page, "%d (%d)\n", | |
4101 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4102 | mddev->chunk_sectors << 9); |
4103 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4104 | } |
4105 | ||
4106 | static ssize_t | |
fd01b88c | 4107 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4108 | { |
4c9309c0 | 4109 | unsigned long n; |
6791875e | 4110 | int err; |
3b34380a | 4111 | |
4c9309c0 AD |
4112 | err = kstrtoul(buf, 10, &n); |
4113 | if (err < 0) | |
4114 | return err; | |
3b34380a | 4115 | |
6791875e N |
4116 | err = mddev_lock(mddev); |
4117 | if (err) | |
4118 | return err; | |
b3546035 | 4119 | if (mddev->pers) { |
50ac168a | 4120 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4121 | err = -EBUSY; |
4122 | else if (mddev->ro) | |
4123 | err = -EROFS; | |
4124 | else { | |
4125 | mddev->new_chunk_sectors = n >> 9; | |
4126 | err = mddev->pers->check_reshape(mddev); | |
4127 | if (err) | |
4128 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4129 | } |
b3546035 | 4130 | } else { |
664e7c41 | 4131 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4132 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4133 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4134 | } |
6791875e N |
4135 | mddev_unlock(mddev); |
4136 | return err ?: len; | |
3b34380a N |
4137 | } |
4138 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4139 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4140 | |
a94213b1 | 4141 | static ssize_t |
fd01b88c | 4142 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4143 | { |
d1a7c503 N |
4144 | if (mddev->recovery_cp == MaxSector) |
4145 | return sprintf(page, "none\n"); | |
a94213b1 N |
4146 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4147 | } | |
4148 | ||
4149 | static ssize_t | |
fd01b88c | 4150 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4151 | { |
4c9309c0 | 4152 | unsigned long long n; |
6791875e | 4153 | int err; |
4c9309c0 AD |
4154 | |
4155 | if (cmd_match(buf, "none")) | |
4156 | n = MaxSector; | |
4157 | else { | |
4158 | err = kstrtoull(buf, 10, &n); | |
4159 | if (err < 0) | |
4160 | return err; | |
4161 | if (n != (sector_t)n) | |
4162 | return -EINVAL; | |
4163 | } | |
a94213b1 | 4164 | |
6791875e N |
4165 | err = mddev_lock(mddev); |
4166 | if (err) | |
4167 | return err; | |
b098636c | 4168 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4169 | err = -EBUSY; |
a94213b1 | 4170 | |
6791875e N |
4171 | if (!err) { |
4172 | mddev->recovery_cp = n; | |
4173 | if (mddev->pers) | |
2953079c | 4174 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4175 | } |
4176 | mddev_unlock(mddev); | |
4177 | return err ?: len; | |
a94213b1 N |
4178 | } |
4179 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4180 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4181 | resync_start_show, resync_start_store); | |
a94213b1 | 4182 | |
9e653b63 N |
4183 | /* |
4184 | * The array state can be: | |
4185 | * | |
4186 | * clear | |
4187 | * No devices, no size, no level | |
4188 | * Equivalent to STOP_ARRAY ioctl | |
4189 | * inactive | |
4190 | * May have some settings, but array is not active | |
4191 | * all IO results in error | |
4192 | * When written, doesn't tear down array, but just stops it | |
4193 | * suspended (not supported yet) | |
4194 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4195 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4196 | * readonly |
4197 | * no resync can happen. no superblocks get written. | |
4198 | * write requests fail | |
4199 | * read-auto | |
4200 | * like readonly, but behaves like 'clean' on a write request. | |
4201 | * | |
4202 | * clean - no pending writes, but otherwise active. | |
4203 | * When written to inactive array, starts without resync | |
4204 | * If a write request arrives then | |
4205 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4206 | * if not known, block and switch to write-pending | |
4207 | * If written to an active array that has pending writes, then fails. | |
4208 | * active | |
4209 | * fully active: IO and resync can be happening. | |
4210 | * When written to inactive array, starts with resync | |
4211 | * | |
4212 | * write-pending | |
4213 | * clean, but writes are blocked waiting for 'active' to be written. | |
4214 | * | |
4215 | * active-idle | |
4216 | * like active, but no writes have been seen for a while (100msec). | |
4217 | * | |
62f7b198 GP |
4218 | * broken |
4219 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4220 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4221 | * when a member is gone, so this state will at least alert the | |
4222 | * user that something is wrong. | |
9e653b63 N |
4223 | */ |
4224 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4225 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4226 | static char *array_states[] = { |
9e653b63 | 4227 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4228 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4229 | |
4230 | static int match_word(const char *word, char **list) | |
4231 | { | |
4232 | int n; | |
4233 | for (n=0; list[n]; n++) | |
4234 | if (cmd_match(word, list[n])) | |
4235 | break; | |
4236 | return n; | |
4237 | } | |
4238 | ||
4239 | static ssize_t | |
fd01b88c | 4240 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4241 | { |
4242 | enum array_state st = inactive; | |
4243 | ||
62f7b198 | 4244 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4245 | switch(mddev->ro) { |
4246 | case 1: | |
4247 | st = readonly; | |
4248 | break; | |
4249 | case 2: | |
4250 | st = read_auto; | |
4251 | break; | |
4252 | case 0: | |
55cc39f3 | 4253 | spin_lock(&mddev->lock); |
2953079c | 4254 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4255 | st = write_pending; |
16f88949 TM |
4256 | else if (mddev->in_sync) |
4257 | st = clean; | |
9e653b63 N |
4258 | else if (mddev->safemode) |
4259 | st = active_idle; | |
4260 | else | |
4261 | st = active; | |
55cc39f3 | 4262 | spin_unlock(&mddev->lock); |
9e653b63 | 4263 | } |
62f7b198 GP |
4264 | |
4265 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4266 | st = broken; | |
4267 | } else { | |
9e653b63 N |
4268 | if (list_empty(&mddev->disks) && |
4269 | mddev->raid_disks == 0 && | |
58c0fed4 | 4270 | mddev->dev_sectors == 0) |
9e653b63 N |
4271 | st = clear; |
4272 | else | |
4273 | st = inactive; | |
4274 | } | |
4275 | return sprintf(page, "%s\n", array_states[st]); | |
4276 | } | |
4277 | ||
f72ffdd6 N |
4278 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4279 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4280 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4281 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4282 | |
4283 | static ssize_t | |
fd01b88c | 4284 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4285 | { |
6497709b | 4286 | int err = 0; |
9e653b63 | 4287 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4288 | |
4289 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4290 | /* don't take reconfig_mutex when toggling between | |
4291 | * clean and active | |
4292 | */ | |
4293 | spin_lock(&mddev->lock); | |
4294 | if (st == active) { | |
4295 | restart_array(mddev); | |
2953079c | 4296 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4297 | md_wakeup_thread(mddev->thread); |
6791875e | 4298 | wake_up(&mddev->sb_wait); |
6791875e N |
4299 | } else /* st == clean */ { |
4300 | restart_array(mddev); | |
6497709b | 4301 | if (!set_in_sync(mddev)) |
6791875e N |
4302 | err = -EBUSY; |
4303 | } | |
573275b5 TM |
4304 | if (!err) |
4305 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4306 | spin_unlock(&mddev->lock); |
c008f1d3 | 4307 | return err ?: len; |
6791875e N |
4308 | } |
4309 | err = mddev_lock(mddev); | |
4310 | if (err) | |
4311 | return err; | |
4312 | err = -EINVAL; | |
9e653b63 N |
4313 | switch(st) { |
4314 | case bad_word: | |
4315 | break; | |
4316 | case clear: | |
4317 | /* stopping an active array */ | |
a05b7ea0 | 4318 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4319 | break; |
4320 | case inactive: | |
4321 | /* stopping an active array */ | |
90cf195d | 4322 | if (mddev->pers) |
a05b7ea0 | 4323 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4324 | else |
e691063a | 4325 | err = 0; /* already inactive */ |
9e653b63 N |
4326 | break; |
4327 | case suspended: | |
4328 | break; /* not supported yet */ | |
4329 | case readonly: | |
4330 | if (mddev->pers) | |
a05b7ea0 | 4331 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4332 | else { |
4333 | mddev->ro = 1; | |
648b629e | 4334 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4335 | err = do_md_run(mddev); |
4336 | } | |
4337 | break; | |
4338 | case read_auto: | |
9e653b63 | 4339 | if (mddev->pers) { |
80268ee9 | 4340 | if (mddev->ro == 0) |
a05b7ea0 | 4341 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4342 | else if (mddev->ro == 1) |
648b629e N |
4343 | err = restart_array(mddev); |
4344 | if (err == 0) { | |
4345 | mddev->ro = 2; | |
4346 | set_disk_ro(mddev->gendisk, 0); | |
4347 | } | |
9e653b63 N |
4348 | } else { |
4349 | mddev->ro = 2; | |
4350 | err = do_md_run(mddev); | |
4351 | } | |
4352 | break; | |
4353 | case clean: | |
4354 | if (mddev->pers) { | |
339421de SL |
4355 | err = restart_array(mddev); |
4356 | if (err) | |
4357 | break; | |
85572d7c | 4358 | spin_lock(&mddev->lock); |
6497709b | 4359 | if (!set_in_sync(mddev)) |
e691063a | 4360 | err = -EBUSY; |
85572d7c | 4361 | spin_unlock(&mddev->lock); |
5bf29597 N |
4362 | } else |
4363 | err = -EINVAL; | |
9e653b63 N |
4364 | break; |
4365 | case active: | |
4366 | if (mddev->pers) { | |
339421de SL |
4367 | err = restart_array(mddev); |
4368 | if (err) | |
4369 | break; | |
2953079c | 4370 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4371 | wake_up(&mddev->sb_wait); |
4372 | err = 0; | |
4373 | } else { | |
4374 | mddev->ro = 0; | |
648b629e | 4375 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4376 | err = do_md_run(mddev); |
4377 | } | |
4378 | break; | |
4379 | case write_pending: | |
4380 | case active_idle: | |
62f7b198 | 4381 | case broken: |
9e653b63 N |
4382 | /* these cannot be set */ |
4383 | break; | |
4384 | } | |
6791875e N |
4385 | |
4386 | if (!err) { | |
1d23f178 N |
4387 | if (mddev->hold_active == UNTIL_IOCTL) |
4388 | mddev->hold_active = 0; | |
00bcb4ac | 4389 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4390 | } |
6791875e N |
4391 | mddev_unlock(mddev); |
4392 | return err ?: len; | |
9e653b63 | 4393 | } |
80ca3a44 | 4394 | static struct md_sysfs_entry md_array_state = |
750f199e | 4395 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4396 | |
1e50915f | 4397 | static ssize_t |
fd01b88c | 4398 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4399 | return sprintf(page, "%d\n", |
4400 | atomic_read(&mddev->max_corr_read_errors)); | |
4401 | } | |
4402 | ||
4403 | static ssize_t | |
fd01b88c | 4404 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4405 | { |
4c9309c0 AD |
4406 | unsigned int n; |
4407 | int rv; | |
1e50915f | 4408 | |
4c9309c0 AD |
4409 | rv = kstrtouint(buf, 10, &n); |
4410 | if (rv < 0) | |
4411 | return rv; | |
4412 | atomic_set(&mddev->max_corr_read_errors, n); | |
4413 | return len; | |
1e50915f RB |
4414 | } |
4415 | ||
4416 | static struct md_sysfs_entry max_corr_read_errors = | |
4417 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4418 | max_corrected_read_errors_store); | |
4419 | ||
6d7ff738 | 4420 | static ssize_t |
fd01b88c | 4421 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4422 | { |
4423 | return -EINVAL; | |
4424 | } | |
4425 | ||
4426 | static ssize_t | |
fd01b88c | 4427 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4428 | { |
4429 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4430 | /* The new device is added to the array. | |
4431 | * If the array has a persistent superblock, we read the | |
4432 | * superblock to initialise info and check validity. | |
4433 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4434 | * which mainly checks size. | |
4435 | */ | |
4436 | char *e; | |
4437 | int major = simple_strtoul(buf, &e, 10); | |
4438 | int minor; | |
4439 | dev_t dev; | |
3cb03002 | 4440 | struct md_rdev *rdev; |
6d7ff738 N |
4441 | int err; |
4442 | ||
4443 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4444 | return -EINVAL; | |
4445 | minor = simple_strtoul(e+1, &e, 10); | |
4446 | if (*e && *e != '\n') | |
4447 | return -EINVAL; | |
4448 | dev = MKDEV(major, minor); | |
4449 | if (major != MAJOR(dev) || | |
4450 | minor != MINOR(dev)) | |
4451 | return -EOVERFLOW; | |
4452 | ||
6791875e N |
4453 | flush_workqueue(md_misc_wq); |
4454 | ||
4455 | err = mddev_lock(mddev); | |
4456 | if (err) | |
4457 | return err; | |
6d7ff738 N |
4458 | if (mddev->persistent) { |
4459 | rdev = md_import_device(dev, mddev->major_version, | |
4460 | mddev->minor_version); | |
4461 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4462 | struct md_rdev *rdev0 |
4463 | = list_entry(mddev->disks.next, | |
4464 | struct md_rdev, same_set); | |
6d7ff738 N |
4465 | err = super_types[mddev->major_version] |
4466 | .load_super(rdev, rdev0, mddev->minor_version); | |
4467 | if (err < 0) | |
4468 | goto out; | |
4469 | } | |
c5d79adb N |
4470 | } else if (mddev->external) |
4471 | rdev = md_import_device(dev, -2, -1); | |
4472 | else | |
6d7ff738 N |
4473 | rdev = md_import_device(dev, -1, -1); |
4474 | ||
9a8c0fa8 N |
4475 | if (IS_ERR(rdev)) { |
4476 | mddev_unlock(mddev); | |
6d7ff738 | 4477 | return PTR_ERR(rdev); |
9a8c0fa8 | 4478 | } |
6d7ff738 N |
4479 | err = bind_rdev_to_array(rdev, mddev); |
4480 | out: | |
4481 | if (err) | |
4482 | export_rdev(rdev); | |
6791875e | 4483 | mddev_unlock(mddev); |
5492c46e AO |
4484 | if (!err) |
4485 | md_new_event(mddev); | |
6d7ff738 N |
4486 | return err ? err : len; |
4487 | } | |
4488 | ||
4489 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4490 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4491 | |
9b1d1dac | 4492 | static ssize_t |
fd01b88c | 4493 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4494 | { |
4495 | char *end; | |
4496 | unsigned long chunk, end_chunk; | |
6791875e | 4497 | int err; |
9b1d1dac | 4498 | |
6791875e N |
4499 | err = mddev_lock(mddev); |
4500 | if (err) | |
4501 | return err; | |
9b1d1dac PC |
4502 | if (!mddev->bitmap) |
4503 | goto out; | |
4504 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4505 | while (*buf) { | |
4506 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4507 | if (buf == end) break; | |
4508 | if (*end == '-') { /* range */ | |
4509 | buf = end + 1; | |
4510 | end_chunk = simple_strtoul(buf, &end, 0); | |
4511 | if (buf == end) break; | |
4512 | } | |
4513 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4514 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4515 | buf = skip_spaces(end); |
9b1d1dac | 4516 | } |
e64e4018 | 4517 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4518 | out: |
6791875e | 4519 | mddev_unlock(mddev); |
9b1d1dac PC |
4520 | return len; |
4521 | } | |
4522 | ||
4523 | static struct md_sysfs_entry md_bitmap = | |
4524 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4525 | ||
a35b0d69 | 4526 | static ssize_t |
fd01b88c | 4527 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4528 | { |
58c0fed4 AN |
4529 | return sprintf(page, "%llu\n", |
4530 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4531 | } |
4532 | ||
fd01b88c | 4533 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4534 | |
4535 | static ssize_t | |
fd01b88c | 4536 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4537 | { |
4538 | /* If array is inactive, we can reduce the component size, but | |
4539 | * not increase it (except from 0). | |
4540 | * If array is active, we can try an on-line resize | |
4541 | */ | |
b522adcd DW |
4542 | sector_t sectors; |
4543 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4544 | |
58c0fed4 AN |
4545 | if (err < 0) |
4546 | return err; | |
6791875e N |
4547 | err = mddev_lock(mddev); |
4548 | if (err) | |
4549 | return err; | |
a35b0d69 | 4550 | if (mddev->pers) { |
58c0fed4 | 4551 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4552 | if (err == 0) |
4553 | md_update_sb(mddev, 1); | |
a35b0d69 | 4554 | } else { |
58c0fed4 AN |
4555 | if (mddev->dev_sectors == 0 || |
4556 | mddev->dev_sectors > sectors) | |
4557 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4558 | else |
4559 | err = -ENOSPC; | |
4560 | } | |
6791875e | 4561 | mddev_unlock(mddev); |
a35b0d69 N |
4562 | return err ? err : len; |
4563 | } | |
4564 | ||
4565 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4566 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4567 | |
83f0d77a | 4568 | /* Metadata version. |
e691063a N |
4569 | * This is one of |
4570 | * 'none' for arrays with no metadata (good luck...) | |
4571 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4572 | * or N.M for internally known formats |
4573 | */ | |
4574 | static ssize_t | |
fd01b88c | 4575 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4576 | { |
4577 | if (mddev->persistent) | |
4578 | return sprintf(page, "%d.%d\n", | |
4579 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4580 | else if (mddev->external) |
4581 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4582 | else |
4583 | return sprintf(page, "none\n"); | |
4584 | } | |
4585 | ||
4586 | static ssize_t | |
fd01b88c | 4587 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4588 | { |
4589 | int major, minor; | |
4590 | char *e; | |
6791875e | 4591 | int err; |
ea43ddd8 N |
4592 | /* Changing the details of 'external' metadata is |
4593 | * always permitted. Otherwise there must be | |
4594 | * no devices attached to the array. | |
4595 | */ | |
6791875e N |
4596 | |
4597 | err = mddev_lock(mddev); | |
4598 | if (err) | |
4599 | return err; | |
4600 | err = -EBUSY; | |
ea43ddd8 N |
4601 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4602 | ; | |
4603 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4604 | goto out_unlock; |
8bb93aac | 4605 | |
6791875e | 4606 | err = 0; |
8bb93aac N |
4607 | if (cmd_match(buf, "none")) { |
4608 | mddev->persistent = 0; | |
e691063a N |
4609 | mddev->external = 0; |
4610 | mddev->major_version = 0; | |
4611 | mddev->minor_version = 90; | |
6791875e | 4612 | goto out_unlock; |
e691063a N |
4613 | } |
4614 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4615 | size_t namelen = len-9; |
e691063a N |
4616 | if (namelen >= sizeof(mddev->metadata_type)) |
4617 | namelen = sizeof(mddev->metadata_type)-1; | |
4618 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4619 | mddev->metadata_type[namelen] = 0; | |
4620 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4621 | mddev->metadata_type[--namelen] = 0; | |
4622 | mddev->persistent = 0; | |
4623 | mddev->external = 1; | |
8bb93aac N |
4624 | mddev->major_version = 0; |
4625 | mddev->minor_version = 90; | |
6791875e | 4626 | goto out_unlock; |
8bb93aac N |
4627 | } |
4628 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4629 | err = -EINVAL; |
8bb93aac | 4630 | if (e==buf || *e != '.') |
6791875e | 4631 | goto out_unlock; |
8bb93aac N |
4632 | buf = e+1; |
4633 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4634 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4635 | goto out_unlock; |
4636 | err = -ENOENT; | |
50511da3 | 4637 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4638 | goto out_unlock; |
8bb93aac N |
4639 | mddev->major_version = major; |
4640 | mddev->minor_version = minor; | |
4641 | mddev->persistent = 1; | |
e691063a | 4642 | mddev->external = 0; |
6791875e N |
4643 | err = 0; |
4644 | out_unlock: | |
4645 | mddev_unlock(mddev); | |
4646 | return err ?: len; | |
8bb93aac N |
4647 | } |
4648 | ||
4649 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4650 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4651 | |
24dd469d | 4652 | static ssize_t |
fd01b88c | 4653 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4654 | { |
7eec314d | 4655 | char *type = "idle"; |
b7b17c9b N |
4656 | unsigned long recovery = mddev->recovery; |
4657 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4658 | type = "frozen"; |
b7b17c9b N |
4659 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4660 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4661 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4662 | type = "reshape"; |
b7b17c9b N |
4663 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4664 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4665 | type = "resync"; |
b7b17c9b | 4666 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4667 | type = "check"; |
4668 | else | |
4669 | type = "repair"; | |
b7b17c9b | 4670 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4671 | type = "recover"; |
985ca973 N |
4672 | else if (mddev->reshape_position != MaxSector) |
4673 | type = "reshape"; | |
24dd469d N |
4674 | } |
4675 | return sprintf(page, "%s\n", type); | |
4676 | } | |
4677 | ||
4678 | static ssize_t | |
fd01b88c | 4679 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4680 | { |
7eec314d N |
4681 | if (!mddev->pers || !mddev->pers->sync_request) |
4682 | return -EINVAL; | |
4683 | ||
b6a9ce68 N |
4684 | |
4685 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4686 | if (cmd_match(page, "frozen")) |
4687 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4688 | else | |
4689 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4690 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4691 | mddev_lock(mddev) == 0) { | |
4692 | flush_workqueue(md_misc_wq); | |
4693 | if (mddev->sync_thread) { | |
4694 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4695 | md_reap_sync_thread(mddev); |
6791875e | 4696 | } |
8e8e2518 | 4697 | mddev_unlock(mddev); |
7eec314d | 4698 | } |
312045ee | 4699 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4700 | return -EBUSY; |
72a23c21 | 4701 | else if (cmd_match(page, "resync")) |
56ccc112 | 4702 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4703 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4704 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4705 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4706 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4707 | int err; |
4708 | if (mddev->pers->start_reshape == NULL) | |
4709 | return -EINVAL; | |
6791875e N |
4710 | err = mddev_lock(mddev); |
4711 | if (!err) { | |
312045ee N |
4712 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4713 | err = -EBUSY; | |
4714 | else { | |
4715 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4716 | err = mddev->pers->start_reshape(mddev); | |
4717 | } | |
6791875e N |
4718 | mddev_unlock(mddev); |
4719 | } | |
16484bf5 N |
4720 | if (err) |
4721 | return err; | |
a99ac971 | 4722 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4723 | } else { |
bce74dac | 4724 | if (cmd_match(page, "check")) |
7eec314d | 4725 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4726 | else if (!cmd_match(page, "repair")) |
7eec314d | 4727 | return -EINVAL; |
56ccc112 | 4728 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4729 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4730 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4731 | } |
48c26ddc N |
4732 | if (mddev->ro == 2) { |
4733 | /* A write to sync_action is enough to justify | |
4734 | * canceling read-auto mode | |
4735 | */ | |
4736 | mddev->ro = 0; | |
4737 | md_wakeup_thread(mddev->sync_thread); | |
4738 | } | |
03c902e1 | 4739 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4740 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4741 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4742 | return len; |
4743 | } | |
4744 | ||
c4a39551 | 4745 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4746 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4747 | |
4748 | static ssize_t | |
4749 | last_sync_action_show(struct mddev *mddev, char *page) | |
4750 | { | |
4751 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4752 | } | |
4753 | ||
4754 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4755 | ||
9d88883e | 4756 | static ssize_t |
fd01b88c | 4757 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4758 | { |
4759 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4760 | (unsigned long long) |
4761 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4762 | } |
4763 | ||
80ca3a44 | 4764 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4765 | |
88202a0c | 4766 | static ssize_t |
fd01b88c | 4767 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4768 | { |
4769 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4770 | mddev->sync_speed_min ? "local": "system"); | |
4771 | } | |
4772 | ||
4773 | static ssize_t | |
fd01b88c | 4774 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4775 | { |
4c9309c0 AD |
4776 | unsigned int min; |
4777 | int rv; | |
4778 | ||
88202a0c | 4779 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4780 | min = 0; |
4781 | } else { | |
4782 | rv = kstrtouint(buf, 10, &min); | |
4783 | if (rv < 0) | |
4784 | return rv; | |
4785 | if (min == 0) | |
4786 | return -EINVAL; | |
88202a0c | 4787 | } |
88202a0c N |
4788 | mddev->sync_speed_min = min; |
4789 | return len; | |
4790 | } | |
4791 | ||
4792 | static struct md_sysfs_entry md_sync_min = | |
4793 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4794 | ||
4795 | static ssize_t | |
fd01b88c | 4796 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4797 | { |
4798 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4799 | mddev->sync_speed_max ? "local": "system"); | |
4800 | } | |
4801 | ||
4802 | static ssize_t | |
fd01b88c | 4803 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4804 | { |
4c9309c0 AD |
4805 | unsigned int max; |
4806 | int rv; | |
4807 | ||
88202a0c | 4808 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4809 | max = 0; |
4810 | } else { | |
4811 | rv = kstrtouint(buf, 10, &max); | |
4812 | if (rv < 0) | |
4813 | return rv; | |
4814 | if (max == 0) | |
4815 | return -EINVAL; | |
88202a0c | 4816 | } |
88202a0c N |
4817 | mddev->sync_speed_max = max; |
4818 | return len; | |
4819 | } | |
4820 | ||
4821 | static struct md_sysfs_entry md_sync_max = | |
4822 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4823 | ||
d7f3d291 | 4824 | static ssize_t |
fd01b88c | 4825 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4826 | { |
4827 | return sprintf(page, "%d\n", mddev->degraded); | |
4828 | } | |
4829 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4830 | |
90b08710 | 4831 | static ssize_t |
fd01b88c | 4832 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4833 | { |
4834 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4835 | } | |
4836 | ||
4837 | static ssize_t | |
fd01b88c | 4838 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4839 | { |
4840 | long n; | |
4841 | ||
b29bebd6 | 4842 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4843 | return -EINVAL; |
4844 | ||
4845 | if (n != 0 && n != 1) | |
4846 | return -EINVAL; | |
4847 | ||
4848 | mddev->parallel_resync = n; | |
4849 | ||
4850 | if (mddev->sync_thread) | |
4851 | wake_up(&resync_wait); | |
4852 | ||
4853 | return len; | |
4854 | } | |
4855 | ||
4856 | /* force parallel resync, even with shared block devices */ | |
4857 | static struct md_sysfs_entry md_sync_force_parallel = | |
4858 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4859 | sync_force_parallel_show, sync_force_parallel_store); | |
4860 | ||
88202a0c | 4861 | static ssize_t |
fd01b88c | 4862 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4863 | { |
4864 | unsigned long resync, dt, db; | |
d1a7c503 N |
4865 | if (mddev->curr_resync == 0) |
4866 | return sprintf(page, "none\n"); | |
9687a60c AN |
4867 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4868 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4869 | if (!dt) dt++; |
9687a60c AN |
4870 | db = resync - mddev->resync_mark_cnt; |
4871 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4872 | } |
4873 | ||
80ca3a44 | 4874 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4875 | |
4876 | static ssize_t | |
fd01b88c | 4877 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4878 | { |
13ae864b | 4879 | unsigned long long max_sectors, resync; |
88202a0c | 4880 | |
acb180b0 N |
4881 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4882 | return sprintf(page, "none\n"); | |
4883 | ||
72f36d59 N |
4884 | if (mddev->curr_resync == 1 || |
4885 | mddev->curr_resync == 2) | |
4886 | return sprintf(page, "delayed\n"); | |
4887 | ||
c804cdec N |
4888 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4889 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4890 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4891 | else |
58c0fed4 | 4892 | max_sectors = mddev->dev_sectors; |
88202a0c | 4893 | |
acb180b0 | 4894 | resync = mddev->curr_resync_completed; |
13ae864b | 4895 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4896 | } |
4897 | ||
750f199e N |
4898 | static struct md_sysfs_entry md_sync_completed = |
4899 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4900 | |
5e96ee65 | 4901 | static ssize_t |
fd01b88c | 4902 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4903 | { |
4904 | return sprintf(page, "%llu\n", | |
4905 | (unsigned long long)mddev->resync_min); | |
4906 | } | |
4907 | static ssize_t | |
fd01b88c | 4908 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4909 | { |
4910 | unsigned long long min; | |
23da422b | 4911 | int err; |
23da422b | 4912 | |
b29bebd6 | 4913 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4914 | return -EINVAL; |
23da422b N |
4915 | |
4916 | spin_lock(&mddev->lock); | |
4917 | err = -EINVAL; | |
5e96ee65 | 4918 | if (min > mddev->resync_max) |
23da422b N |
4919 | goto out_unlock; |
4920 | ||
4921 | err = -EBUSY; | |
5e96ee65 | 4922 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4923 | goto out_unlock; |
5e96ee65 | 4924 | |
50c37b13 N |
4925 | /* Round down to multiple of 4K for safety */ |
4926 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4927 | err = 0; |
5e96ee65 | 4928 | |
23da422b N |
4929 | out_unlock: |
4930 | spin_unlock(&mddev->lock); | |
4931 | return err ?: len; | |
5e96ee65 NB |
4932 | } |
4933 | ||
4934 | static struct md_sysfs_entry md_min_sync = | |
4935 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4936 | ||
c6207277 | 4937 | static ssize_t |
fd01b88c | 4938 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4939 | { |
4940 | if (mddev->resync_max == MaxSector) | |
4941 | return sprintf(page, "max\n"); | |
4942 | else | |
4943 | return sprintf(page, "%llu\n", | |
4944 | (unsigned long long)mddev->resync_max); | |
4945 | } | |
4946 | static ssize_t | |
fd01b88c | 4947 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4948 | { |
23da422b N |
4949 | int err; |
4950 | spin_lock(&mddev->lock); | |
c6207277 N |
4951 | if (strncmp(buf, "max", 3) == 0) |
4952 | mddev->resync_max = MaxSector; | |
4953 | else { | |
5e96ee65 | 4954 | unsigned long long max; |
23da422b N |
4955 | int chunk; |
4956 | ||
4957 | err = -EINVAL; | |
b29bebd6 | 4958 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4959 | goto out_unlock; |
5e96ee65 | 4960 | if (max < mddev->resync_min) |
23da422b N |
4961 | goto out_unlock; |
4962 | ||
4963 | err = -EBUSY; | |
c6207277 | 4964 | if (max < mddev->resync_max && |
4d484a4a | 4965 | mddev->ro == 0 && |
c6207277 | 4966 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4967 | goto out_unlock; |
c6207277 N |
4968 | |
4969 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4970 | chunk = mddev->chunk_sectors; |
4971 | if (chunk) { | |
2ac06c33 | 4972 | sector_t temp = max; |
23da422b N |
4973 | |
4974 | err = -EINVAL; | |
4975 | if (sector_div(temp, chunk)) | |
4976 | goto out_unlock; | |
c6207277 N |
4977 | } |
4978 | mddev->resync_max = max; | |
4979 | } | |
4980 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4981 | err = 0; |
4982 | out_unlock: | |
4983 | spin_unlock(&mddev->lock); | |
4984 | return err ?: len; | |
c6207277 N |
4985 | } |
4986 | ||
4987 | static struct md_sysfs_entry md_max_sync = | |
4988 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4989 | ||
e464eafd | 4990 | static ssize_t |
fd01b88c | 4991 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4992 | { |
4993 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4994 | } | |
4995 | ||
4996 | static ssize_t | |
fd01b88c | 4997 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4998 | { |
b03e0ccb | 4999 | unsigned long long new; |
6791875e | 5000 | int err; |
e464eafd | 5001 | |
4c9309c0 AD |
5002 | err = kstrtoull(buf, 10, &new); |
5003 | if (err < 0) | |
5004 | return err; | |
5005 | if (new != (sector_t)new) | |
e464eafd | 5006 | return -EINVAL; |
23ddff37 | 5007 | |
6791875e N |
5008 | err = mddev_lock(mddev); |
5009 | if (err) | |
5010 | return err; | |
5011 | err = -EINVAL; | |
5012 | if (mddev->pers == NULL || | |
5013 | mddev->pers->quiesce == NULL) | |
5014 | goto unlock; | |
b03e0ccb | 5015 | mddev_suspend(mddev); |
23ddff37 | 5016 | mddev->suspend_lo = new; |
b03e0ccb N |
5017 | mddev_resume(mddev); |
5018 | ||
6791875e N |
5019 | err = 0; |
5020 | unlock: | |
5021 | mddev_unlock(mddev); | |
5022 | return err ?: len; | |
e464eafd N |
5023 | } |
5024 | static struct md_sysfs_entry md_suspend_lo = | |
5025 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
5026 | ||
e464eafd | 5027 | static ssize_t |
fd01b88c | 5028 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
5029 | { |
5030 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
5031 | } | |
5032 | ||
5033 | static ssize_t | |
fd01b88c | 5034 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5035 | { |
b03e0ccb | 5036 | unsigned long long new; |
6791875e | 5037 | int err; |
e464eafd | 5038 | |
4c9309c0 AD |
5039 | err = kstrtoull(buf, 10, &new); |
5040 | if (err < 0) | |
5041 | return err; | |
5042 | if (new != (sector_t)new) | |
e464eafd | 5043 | return -EINVAL; |
23ddff37 | 5044 | |
6791875e N |
5045 | err = mddev_lock(mddev); |
5046 | if (err) | |
5047 | return err; | |
5048 | err = -EINVAL; | |
b03e0ccb | 5049 | if (mddev->pers == NULL) |
6791875e | 5050 | goto unlock; |
b03e0ccb N |
5051 | |
5052 | mddev_suspend(mddev); | |
23ddff37 | 5053 | mddev->suspend_hi = new; |
b03e0ccb N |
5054 | mddev_resume(mddev); |
5055 | ||
6791875e N |
5056 | err = 0; |
5057 | unlock: | |
5058 | mddev_unlock(mddev); | |
5059 | return err ?: len; | |
e464eafd N |
5060 | } |
5061 | static struct md_sysfs_entry md_suspend_hi = | |
5062 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5063 | ||
08a02ecd | 5064 | static ssize_t |
fd01b88c | 5065 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5066 | { |
5067 | if (mddev->reshape_position != MaxSector) | |
5068 | return sprintf(page, "%llu\n", | |
5069 | (unsigned long long)mddev->reshape_position); | |
5070 | strcpy(page, "none\n"); | |
5071 | return 5; | |
5072 | } | |
5073 | ||
5074 | static ssize_t | |
fd01b88c | 5075 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5076 | { |
c6563a8c | 5077 | struct md_rdev *rdev; |
4c9309c0 | 5078 | unsigned long long new; |
6791875e | 5079 | int err; |
6791875e | 5080 | |
4c9309c0 AD |
5081 | err = kstrtoull(buf, 10, &new); |
5082 | if (err < 0) | |
5083 | return err; | |
5084 | if (new != (sector_t)new) | |
08a02ecd | 5085 | return -EINVAL; |
6791875e N |
5086 | err = mddev_lock(mddev); |
5087 | if (err) | |
5088 | return err; | |
5089 | err = -EBUSY; | |
5090 | if (mddev->pers) | |
5091 | goto unlock; | |
08a02ecd N |
5092 | mddev->reshape_position = new; |
5093 | mddev->delta_disks = 0; | |
2c810cdd | 5094 | mddev->reshape_backwards = 0; |
08a02ecd N |
5095 | mddev->new_level = mddev->level; |
5096 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5097 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5098 | rdev_for_each(rdev, mddev) |
5099 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5100 | err = 0; |
5101 | unlock: | |
5102 | mddev_unlock(mddev); | |
5103 | return err ?: len; | |
08a02ecd N |
5104 | } |
5105 | ||
5106 | static struct md_sysfs_entry md_reshape_position = | |
5107 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5108 | reshape_position_store); | |
5109 | ||
2c810cdd N |
5110 | static ssize_t |
5111 | reshape_direction_show(struct mddev *mddev, char *page) | |
5112 | { | |
5113 | return sprintf(page, "%s\n", | |
5114 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5115 | } | |
5116 | ||
5117 | static ssize_t | |
5118 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5119 | { | |
5120 | int backwards = 0; | |
6791875e N |
5121 | int err; |
5122 | ||
2c810cdd N |
5123 | if (cmd_match(buf, "forwards")) |
5124 | backwards = 0; | |
5125 | else if (cmd_match(buf, "backwards")) | |
5126 | backwards = 1; | |
5127 | else | |
5128 | return -EINVAL; | |
5129 | if (mddev->reshape_backwards == backwards) | |
5130 | return len; | |
5131 | ||
6791875e N |
5132 | err = mddev_lock(mddev); |
5133 | if (err) | |
5134 | return err; | |
2c810cdd N |
5135 | /* check if we are allowed to change */ |
5136 | if (mddev->delta_disks) | |
6791875e N |
5137 | err = -EBUSY; |
5138 | else if (mddev->persistent && | |
2c810cdd | 5139 | mddev->major_version == 0) |
6791875e N |
5140 | err = -EINVAL; |
5141 | else | |
5142 | mddev->reshape_backwards = backwards; | |
5143 | mddev_unlock(mddev); | |
5144 | return err ?: len; | |
2c810cdd N |
5145 | } |
5146 | ||
5147 | static struct md_sysfs_entry md_reshape_direction = | |
5148 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5149 | reshape_direction_store); | |
5150 | ||
b522adcd | 5151 | static ssize_t |
fd01b88c | 5152 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5153 | { |
5154 | if (mddev->external_size) | |
5155 | return sprintf(page, "%llu\n", | |
5156 | (unsigned long long)mddev->array_sectors/2); | |
5157 | else | |
5158 | return sprintf(page, "default\n"); | |
5159 | } | |
5160 | ||
5161 | static ssize_t | |
fd01b88c | 5162 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5163 | { |
5164 | sector_t sectors; | |
6791875e N |
5165 | int err; |
5166 | ||
5167 | err = mddev_lock(mddev); | |
5168 | if (err) | |
5169 | return err; | |
b522adcd | 5170 | |
ab5a98b1 | 5171 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5172 | if (mddev_is_clustered(mddev)) { |
5173 | mddev_unlock(mddev); | |
ab5a98b1 | 5174 | return -EINVAL; |
b670883b | 5175 | } |
ab5a98b1 | 5176 | |
b522adcd DW |
5177 | if (strncmp(buf, "default", 7) == 0) { |
5178 | if (mddev->pers) | |
5179 | sectors = mddev->pers->size(mddev, 0, 0); | |
5180 | else | |
5181 | sectors = mddev->array_sectors; | |
5182 | ||
5183 | mddev->external_size = 0; | |
5184 | } else { | |
5185 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5186 | err = -EINVAL; |
5187 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5188 | err = -E2BIG; | |
5189 | else | |
5190 | mddev->external_size = 1; | |
b522adcd DW |
5191 | } |
5192 | ||
6791875e N |
5193 | if (!err) { |
5194 | mddev->array_sectors = sectors; | |
5195 | if (mddev->pers) { | |
5196 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5197 | revalidate_disk(mddev->gendisk); | |
5198 | } | |
cbe6ef1d | 5199 | } |
6791875e N |
5200 | mddev_unlock(mddev); |
5201 | return err ?: len; | |
b522adcd DW |
5202 | } |
5203 | ||
5204 | static struct md_sysfs_entry md_array_size = | |
5205 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5206 | array_size_store); | |
e464eafd | 5207 | |
664aed04 AP |
5208 | static ssize_t |
5209 | consistency_policy_show(struct mddev *mddev, char *page) | |
5210 | { | |
5211 | int ret; | |
5212 | ||
5213 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5214 | ret = sprintf(page, "journal\n"); | |
5215 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5216 | ret = sprintf(page, "ppl\n"); | |
5217 | } else if (mddev->bitmap) { | |
5218 | ret = sprintf(page, "bitmap\n"); | |
5219 | } else if (mddev->pers) { | |
5220 | if (mddev->pers->sync_request) | |
5221 | ret = sprintf(page, "resync\n"); | |
5222 | else | |
5223 | ret = sprintf(page, "none\n"); | |
5224 | } else { | |
5225 | ret = sprintf(page, "unknown\n"); | |
5226 | } | |
5227 | ||
5228 | return ret; | |
5229 | } | |
5230 | ||
5231 | static ssize_t | |
5232 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5233 | { | |
ba903a3e AP |
5234 | int err = 0; |
5235 | ||
664aed04 | 5236 | if (mddev->pers) { |
ba903a3e AP |
5237 | if (mddev->pers->change_consistency_policy) |
5238 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5239 | else | |
5240 | err = -EBUSY; | |
664aed04 AP |
5241 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5242 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5243 | } else { |
ba903a3e | 5244 | err = -EINVAL; |
664aed04 | 5245 | } |
ba903a3e AP |
5246 | |
5247 | return err ? err : len; | |
664aed04 AP |
5248 | } |
5249 | ||
5250 | static struct md_sysfs_entry md_consistency_policy = | |
5251 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5252 | consistency_policy_store); | |
5253 | ||
9a567843 GJ |
5254 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5255 | { | |
5256 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5257 | } | |
5258 | ||
5259 | /* | |
5260 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5261 | * from RAID1/RAID10. | |
5262 | */ | |
5263 | static ssize_t | |
5264 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5265 | { | |
5266 | int ret; | |
5267 | bool value; | |
5268 | ||
5269 | ret = kstrtobool(buf, &value); | |
5270 | if (ret) | |
5271 | return ret; | |
5272 | ||
5273 | if (value != mddev->fail_last_dev) | |
5274 | mddev->fail_last_dev = value; | |
5275 | ||
5276 | return len; | |
5277 | } | |
5278 | static struct md_sysfs_entry md_fail_last_dev = | |
5279 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5280 | fail_last_dev_store); | |
5281 | ||
eae1701f N |
5282 | static struct attribute *md_default_attrs[] = { |
5283 | &md_level.attr, | |
d4dbd025 | 5284 | &md_layout.attr, |
eae1701f | 5285 | &md_raid_disks.attr, |
3b34380a | 5286 | &md_chunk_size.attr, |
a35b0d69 | 5287 | &md_size.attr, |
a94213b1 | 5288 | &md_resync_start.attr, |
8bb93aac | 5289 | &md_metadata.attr, |
6d7ff738 | 5290 | &md_new_device.attr, |
16f17b39 | 5291 | &md_safe_delay.attr, |
9e653b63 | 5292 | &md_array_state.attr, |
08a02ecd | 5293 | &md_reshape_position.attr, |
2c810cdd | 5294 | &md_reshape_direction.attr, |
b522adcd | 5295 | &md_array_size.attr, |
1e50915f | 5296 | &max_corr_read_errors.attr, |
664aed04 | 5297 | &md_consistency_policy.attr, |
9a567843 | 5298 | &md_fail_last_dev.attr, |
411036fa N |
5299 | NULL, |
5300 | }; | |
5301 | ||
5302 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5303 | &md_scan_mode.attr, |
c4a39551 | 5304 | &md_last_scan_mode.attr, |
9d88883e | 5305 | &md_mismatches.attr, |
88202a0c N |
5306 | &md_sync_min.attr, |
5307 | &md_sync_max.attr, | |
5308 | &md_sync_speed.attr, | |
90b08710 | 5309 | &md_sync_force_parallel.attr, |
88202a0c | 5310 | &md_sync_completed.attr, |
5e96ee65 | 5311 | &md_min_sync.attr, |
c6207277 | 5312 | &md_max_sync.attr, |
e464eafd N |
5313 | &md_suspend_lo.attr, |
5314 | &md_suspend_hi.attr, | |
9b1d1dac | 5315 | &md_bitmap.attr, |
d7f3d291 | 5316 | &md_degraded.attr, |
eae1701f N |
5317 | NULL, |
5318 | }; | |
411036fa N |
5319 | static struct attribute_group md_redundancy_group = { |
5320 | .name = NULL, | |
5321 | .attrs = md_redundancy_attrs, | |
5322 | }; | |
5323 | ||
eae1701f N |
5324 | static ssize_t |
5325 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5326 | { | |
5327 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5328 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5329 | ssize_t rv; |
eae1701f N |
5330 | |
5331 | if (!entry->show) | |
5332 | return -EIO; | |
af8a2434 N |
5333 | spin_lock(&all_mddevs_lock); |
5334 | if (list_empty(&mddev->all_mddevs)) { | |
5335 | spin_unlock(&all_mddevs_lock); | |
5336 | return -EBUSY; | |
5337 | } | |
5338 | mddev_get(mddev); | |
5339 | spin_unlock(&all_mddevs_lock); | |
5340 | ||
b7b17c9b | 5341 | rv = entry->show(mddev, page); |
af8a2434 | 5342 | mddev_put(mddev); |
96de1e66 | 5343 | return rv; |
eae1701f N |
5344 | } |
5345 | ||
5346 | static ssize_t | |
5347 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5348 | const char *page, size_t length) | |
5349 | { | |
5350 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5351 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5352 | ssize_t rv; |
eae1701f N |
5353 | |
5354 | if (!entry->store) | |
5355 | return -EIO; | |
67463acb N |
5356 | if (!capable(CAP_SYS_ADMIN)) |
5357 | return -EACCES; | |
af8a2434 N |
5358 | spin_lock(&all_mddevs_lock); |
5359 | if (list_empty(&mddev->all_mddevs)) { | |
5360 | spin_unlock(&all_mddevs_lock); | |
5361 | return -EBUSY; | |
5362 | } | |
5363 | mddev_get(mddev); | |
5364 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5365 | rv = entry->store(mddev, page, length); |
af8a2434 | 5366 | mddev_put(mddev); |
96de1e66 | 5367 | return rv; |
eae1701f N |
5368 | } |
5369 | ||
5370 | static void md_free(struct kobject *ko) | |
5371 | { | |
fd01b88c | 5372 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5373 | |
5374 | if (mddev->sysfs_state) | |
5375 | sysfs_put(mddev->sysfs_state); | |
5376 | ||
d8115c35 BVA |
5377 | if (mddev->gendisk) |
5378 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5379 | if (mddev->queue) |
5380 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5381 | if (mddev->gendisk) |
a21d1504 | 5382 | put_disk(mddev->gendisk); |
4ad23a97 | 5383 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5384 | |
28dec870 KO |
5385 | bioset_exit(&mddev->bio_set); |
5386 | bioset_exit(&mddev->sync_set); | |
eae1701f N |
5387 | kfree(mddev); |
5388 | } | |
5389 | ||
52cf25d0 | 5390 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5391 | .show = md_attr_show, |
5392 | .store = md_attr_store, | |
5393 | }; | |
5394 | static struct kobj_type md_ktype = { | |
5395 | .release = md_free, | |
5396 | .sysfs_ops = &md_sysfs_ops, | |
5397 | .default_attrs = md_default_attrs, | |
5398 | }; | |
5399 | ||
1da177e4 LT |
5400 | int mdp_major = 0; |
5401 | ||
5fd3a17e DW |
5402 | static void mddev_delayed_delete(struct work_struct *ws) |
5403 | { | |
fd01b88c | 5404 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5405 | |
43a70507 | 5406 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5407 | kobject_del(&mddev->kobj); |
5408 | kobject_put(&mddev->kobj); | |
5409 | } | |
5410 | ||
4ad23a97 N |
5411 | static void no_op(struct percpu_ref *r) {} |
5412 | ||
a415c0f1 N |
5413 | int mddev_init_writes_pending(struct mddev *mddev) |
5414 | { | |
5415 | if (mddev->writes_pending.percpu_count_ptr) | |
5416 | return 0; | |
ddde2af7 RG |
5417 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5418 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5419 | return -ENOMEM; |
5420 | /* We want to start with the refcount at zero */ | |
5421 | percpu_ref_put(&mddev->writes_pending); | |
5422 | return 0; | |
5423 | } | |
5424 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5425 | ||
efeb53c0 | 5426 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5427 | { |
039b7225 N |
5428 | /* |
5429 | * If dev is zero, name is the name of a device to allocate with | |
5430 | * an arbitrary minor number. It will be "md_???" | |
5431 | * If dev is non-zero it must be a device number with a MAJOR of | |
5432 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5433 | * the device is being created by opening a node in /dev. | |
5434 | * If "name" is not NULL, the device is being created by | |
5435 | * writing to /sys/module/md_mod/parameters/new_array. | |
5436 | */ | |
48c9c27b | 5437 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5438 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5439 | struct gendisk *disk; |
efeb53c0 N |
5440 | int partitioned; |
5441 | int shift; | |
5442 | int unit; | |
3830c62f | 5443 | int error; |
1da177e4 LT |
5444 | |
5445 | if (!mddev) | |
efeb53c0 N |
5446 | return -ENODEV; |
5447 | ||
5448 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5449 | shift = partitioned ? MdpMinorShift : 0; | |
5450 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5451 | |
e804ac78 TH |
5452 | /* wait for any previous instance of this device to be |
5453 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5454 | */ |
e804ac78 | 5455 | flush_workqueue(md_misc_wq); |
d3374825 | 5456 | |
48c9c27b | 5457 | mutex_lock(&disks_mutex); |
0909dc44 N |
5458 | error = -EEXIST; |
5459 | if (mddev->gendisk) | |
5460 | goto abort; | |
efeb53c0 | 5461 | |
039b7225 | 5462 | if (name && !dev) { |
efeb53c0 N |
5463 | /* Need to ensure that 'name' is not a duplicate. |
5464 | */ | |
fd01b88c | 5465 | struct mddev *mddev2; |
efeb53c0 N |
5466 | spin_lock(&all_mddevs_lock); |
5467 | ||
5468 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5469 | if (mddev2->gendisk && | |
5470 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5471 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5472 | goto abort; |
efeb53c0 N |
5473 | } |
5474 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5475 | } |
039b7225 N |
5476 | if (name && dev) |
5477 | /* | |
5478 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5479 | */ | |
5480 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5481 | |
0909dc44 | 5482 | error = -ENOMEM; |
8b765398 | 5483 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5484 | if (!mddev->queue) |
5485 | goto abort; | |
409c57f3 N |
5486 | mddev->queue->queuedata = mddev; |
5487 | ||
409c57f3 | 5488 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5489 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5490 | |
1da177e4 LT |
5491 | disk = alloc_disk(1 << shift); |
5492 | if (!disk) { | |
8b765398 N |
5493 | blk_cleanup_queue(mddev->queue); |
5494 | mddev->queue = NULL; | |
0909dc44 | 5495 | goto abort; |
1da177e4 | 5496 | } |
efeb53c0 | 5497 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5498 | disk->first_minor = unit << shift; |
efeb53c0 N |
5499 | if (name) |
5500 | strcpy(disk->disk_name, name); | |
5501 | else if (partitioned) | |
1da177e4 | 5502 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5503 | else |
1da177e4 | 5504 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5505 | disk->fops = &md_fops; |
5506 | disk->private_data = mddev; | |
5507 | disk->queue = mddev->queue; | |
56883a7e | 5508 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5509 | /* Allow extended partitions. This makes the |
d3374825 | 5510 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5511 | * remove it now. |
5512 | */ | |
5513 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5514 | mddev->gendisk = disk; |
b0140891 N |
5515 | /* As soon as we call add_disk(), another thread could get |
5516 | * through to md_open, so make sure it doesn't get too far | |
5517 | */ | |
5518 | mutex_lock(&mddev->open_mutex); | |
5519 | add_disk(disk); | |
5520 | ||
28dec870 | 5521 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5522 | if (error) { |
5523 | /* This isn't possible, but as kobject_init_and_add is marked | |
5524 | * __must_check, we must do something with the result | |
5525 | */ | |
9d48739e N |
5526 | pr_debug("md: cannot register %s/md - name in use\n", |
5527 | disk->disk_name); | |
0909dc44 N |
5528 | error = 0; |
5529 | } | |
00bcb4ac N |
5530 | if (mddev->kobj.sd && |
5531 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5532 | pr_debug("pointless warning\n"); |
b0140891 | 5533 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5534 | abort: |
5535 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5536 | if (!error && mddev->kobj.sd) { |
3830c62f | 5537 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5538 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5539 | } |
d3374825 | 5540 | mddev_put(mddev); |
0909dc44 | 5541 | return error; |
efeb53c0 N |
5542 | } |
5543 | ||
5544 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5545 | { | |
78b6350d N |
5546 | if (create_on_open) |
5547 | md_alloc(dev, NULL); | |
1da177e4 LT |
5548 | return NULL; |
5549 | } | |
5550 | ||
e4dca7b7 | 5551 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5552 | { |
039b7225 N |
5553 | /* |
5554 | * val must be "md_*" or "mdNNN". | |
5555 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5556 | * set the name to val. val must not already be an active name. |
039b7225 N |
5557 | * For "mdNNN" we allocate an array with the minor number NNN |
5558 | * which must not already be in use. | |
efeb53c0 N |
5559 | */ |
5560 | int len = strlen(val); | |
5561 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5562 | unsigned long devnum; |
efeb53c0 N |
5563 | |
5564 | while (len && val[len-1] == '\n') | |
5565 | len--; | |
5566 | if (len >= DISK_NAME_LEN) | |
5567 | return -E2BIG; | |
5568 | strlcpy(buf, val, len+1); | |
039b7225 N |
5569 | if (strncmp(buf, "md_", 3) == 0) |
5570 | return md_alloc(0, buf); | |
5571 | if (strncmp(buf, "md", 2) == 0 && | |
5572 | isdigit(buf[2]) && | |
5573 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5574 | devnum <= MINORMASK) | |
5575 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5576 | ||
5577 | return -EINVAL; | |
efeb53c0 N |
5578 | } |
5579 | ||
8376d3c1 | 5580 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5581 | { |
8376d3c1 | 5582 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5583 | |
4ad23a97 N |
5584 | mddev->safemode = 1; |
5585 | if (mddev->external) | |
5586 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5587 | ||
1da177e4 LT |
5588 | md_wakeup_thread(mddev->thread); |
5589 | } | |
5590 | ||
6ff8d8ec | 5591 | static int start_dirty_degraded; |
1da177e4 | 5592 | |
fd01b88c | 5593 | int md_run(struct mddev *mddev) |
1da177e4 | 5594 | { |
2604b703 | 5595 | int err; |
3cb03002 | 5596 | struct md_rdev *rdev; |
84fc4b56 | 5597 | struct md_personality *pers; |
1da177e4 | 5598 | |
a757e64c N |
5599 | if (list_empty(&mddev->disks)) |
5600 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5601 | return -EINVAL; |
1da177e4 LT |
5602 | |
5603 | if (mddev->pers) | |
5604 | return -EBUSY; | |
bb4f1e9d N |
5605 | /* Cannot run until previous stop completes properly */ |
5606 | if (mddev->sysfs_active) | |
5607 | return -EBUSY; | |
b6eb127d | 5608 | |
1da177e4 LT |
5609 | /* |
5610 | * Analyze all RAID superblock(s) | |
5611 | */ | |
1ec4a939 N |
5612 | if (!mddev->raid_disks) { |
5613 | if (!mddev->persistent) | |
5614 | return -EINVAL; | |
6a5cb53a YY |
5615 | err = analyze_sbs(mddev); |
5616 | if (err) | |
5617 | return -EINVAL; | |
1ec4a939 | 5618 | } |
1da177e4 | 5619 | |
d9d166c2 N |
5620 | if (mddev->level != LEVEL_NONE) |
5621 | request_module("md-level-%d", mddev->level); | |
5622 | else if (mddev->clevel[0]) | |
5623 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5624 | |
5625 | /* | |
5626 | * Drop all container device buffers, from now on | |
5627 | * the only valid external interface is through the md | |
5628 | * device. | |
1da177e4 | 5629 | */ |
4b6c1060 | 5630 | mddev->has_superblocks = false; |
dafb20fa | 5631 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5632 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5633 | continue; |
5634 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5635 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5636 | if (mddev->ro != 1 && |
5637 | (bdev_read_only(rdev->bdev) || | |
5638 | bdev_read_only(rdev->meta_bdev))) { | |
5639 | mddev->ro = 1; | |
5640 | if (mddev->gendisk) | |
5641 | set_disk_ro(mddev->gendisk, 1); | |
5642 | } | |
f0d76d70 | 5643 | |
4b6c1060 HM |
5644 | if (rdev->sb_page) |
5645 | mddev->has_superblocks = true; | |
5646 | ||
f0d76d70 N |
5647 | /* perform some consistency tests on the device. |
5648 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5649 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5650 | */ |
a6ff7e08 JB |
5651 | if (rdev->meta_bdev) { |
5652 | /* Nothing to check */; | |
5653 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5654 | if (mddev->dev_sectors && |
5655 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5656 | > rdev->sb_start) { |
9d48739e N |
5657 | pr_warn("md: %s: data overlaps metadata\n", |
5658 | mdname(mddev)); | |
f0d76d70 N |
5659 | return -EINVAL; |
5660 | } | |
5661 | } else { | |
0f420358 | 5662 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5663 | > rdev->data_offset) { |
9d48739e N |
5664 | pr_warn("md: %s: metadata overlaps data\n", |
5665 | mdname(mddev)); | |
f0d76d70 N |
5666 | return -EINVAL; |
5667 | } | |
5668 | } | |
00bcb4ac | 5669 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5670 | } |
5671 | ||
afeee514 KO |
5672 | if (!bioset_initialized(&mddev->bio_set)) { |
5673 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5674 | if (err) | |
5675 | return err; | |
10273170 | 5676 | } |
afeee514 KO |
5677 | if (!bioset_initialized(&mddev->sync_set)) { |
5678 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5679 | if (err) | |
28dec870 | 5680 | return err; |
5a85071c | 5681 | } |
a167f663 | 5682 | |
1da177e4 | 5683 | spin_lock(&pers_lock); |
d9d166c2 | 5684 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5685 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5686 | spin_unlock(&pers_lock); |
d9d166c2 | 5687 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5688 | pr_warn("md: personality for level %d is not loaded!\n", |
5689 | mddev->level); | |
d9d166c2 | 5690 | else |
9d48739e N |
5691 | pr_warn("md: personality for level %s is not loaded!\n", |
5692 | mddev->clevel); | |
bfc9dfdc SL |
5693 | err = -EINVAL; |
5694 | goto abort; | |
1da177e4 | 5695 | } |
1da177e4 | 5696 | spin_unlock(&pers_lock); |
34817e8c N |
5697 | if (mddev->level != pers->level) { |
5698 | mddev->level = pers->level; | |
5699 | mddev->new_level = pers->level; | |
5700 | } | |
d9d166c2 | 5701 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5702 | |
f6705578 | 5703 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5704 | pers->start_reshape == NULL) { |
f6705578 | 5705 | /* This personality cannot handle reshaping... */ |
f6705578 | 5706 | module_put(pers->owner); |
bfc9dfdc SL |
5707 | err = -EINVAL; |
5708 | goto abort; | |
f6705578 N |
5709 | } |
5710 | ||
7dd5e7c3 N |
5711 | if (pers->sync_request) { |
5712 | /* Warn if this is a potentially silly | |
5713 | * configuration. | |
5714 | */ | |
5715 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5716 | struct md_rdev *rdev2; |
7dd5e7c3 | 5717 | int warned = 0; |
159ec1fc | 5718 | |
dafb20fa N |
5719 | rdev_for_each(rdev, mddev) |
5720 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5721 | if (rdev < rdev2 && |
5722 | rdev->bdev->bd_contains == | |
5723 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5724 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5725 | mdname(mddev), | |
5726 | bdevname(rdev->bdev,b), | |
5727 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5728 | warned = 1; |
5729 | } | |
5730 | } | |
159ec1fc | 5731 | |
7dd5e7c3 | 5732 | if (warned) |
9d48739e | 5733 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5734 | } |
5735 | ||
657390d2 | 5736 | mddev->recovery = 0; |
58c0fed4 AN |
5737 | /* may be over-ridden by personality */ |
5738 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5739 | ||
6ff8d8ec | 5740 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5741 | |
0f9552b5 | 5742 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5743 | mddev->ro = 2; /* read-only, but switch on first write */ |
5744 | ||
36d091f4 | 5745 | err = pers->run(mddev); |
13e53df3 | 5746 | if (err) |
9d48739e | 5747 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5748 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5749 | WARN_ONCE(!mddev->external_size, |
5750 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5751 | __func__); | |
5752 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5753 | (unsigned long long)mddev->array_sectors / 2, | |
5754 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5755 | err = -EINVAL; |
b522adcd | 5756 | } |
36d091f4 | 5757 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5758 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5759 | struct bitmap *bitmap; |
5760 | ||
e64e4018 | 5761 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5762 | if (IS_ERR(bitmap)) { |
5763 | err = PTR_ERR(bitmap); | |
9d48739e N |
5764 | pr_warn("%s: failed to create bitmap (%d)\n", |
5765 | mdname(mddev), err); | |
f9209a32 GR |
5766 | } else |
5767 | mddev->bitmap = bitmap; | |
5768 | ||
b15c2e57 | 5769 | } |
d494549a GJ |
5770 | if (err) |
5771 | goto bitmap_abort; | |
3e148a32 GJ |
5772 | |
5773 | if (mddev->bitmap_info.max_write_behind > 0) { | |
3e173ab5 | 5774 | bool create_pool = false; |
3e148a32 GJ |
5775 | |
5776 | rdev_for_each(rdev, mddev) { | |
5777 | if (test_bit(WriteMostly, &rdev->flags) && | |
404659cf | 5778 | rdev_init_serial(rdev)) |
3e173ab5 | 5779 | create_pool = true; |
3e148a32 | 5780 | } |
3e173ab5 | 5781 | if (create_pool && mddev->serial_info_pool == NULL) { |
404659cf GJ |
5782 | mddev->serial_info_pool = |
5783 | mempool_create_kmalloc_pool(NR_SERIAL_INFOS, | |
5784 | sizeof(struct serial_info)); | |
5785 | if (!mddev->serial_info_pool) { | |
3e148a32 | 5786 | err = -ENOMEM; |
d494549a | 5787 | goto bitmap_abort; |
3e148a32 GJ |
5788 | } |
5789 | } | |
5790 | } | |
5791 | ||
5c675f83 | 5792 | if (mddev->queue) { |
bb086a89 SL |
5793 | bool nonrot = true; |
5794 | ||
5795 | rdev_for_each(rdev, mddev) { | |
5796 | if (rdev->raid_disk >= 0 && | |
5797 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5798 | nonrot = false; | |
5799 | break; | |
5800 | } | |
5801 | } | |
5802 | if (mddev->degraded) | |
5803 | nonrot = false; | |
5804 | if (nonrot) | |
8b904b5b | 5805 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5806 | else |
8b904b5b | 5807 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
dc3b17cc JK |
5808 | mddev->queue->backing_dev_info->congested_data = mddev; |
5809 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5810 | } |
36d091f4 | 5811 | if (pers->sync_request) { |
00bcb4ac N |
5812 | if (mddev->kobj.sd && |
5813 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5814 | pr_warn("md: cannot register extra attributes for %s\n", |
5815 | mdname(mddev)); | |
00bcb4ac | 5816 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5817 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5818 | mddev->ro = 0; |
5819 | ||
1e50915f RB |
5820 | atomic_set(&mddev->max_corr_read_errors, |
5821 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5822 | mddev->safemode = 0; |
28c1b9fd GR |
5823 | if (mddev_is_clustered(mddev)) |
5824 | mddev->safemode_delay = 0; | |
5825 | else | |
5826 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5827 | mddev->in_sync = 1; |
0ca69886 | 5828 | smp_wmb(); |
36d091f4 N |
5829 | spin_lock(&mddev->lock); |
5830 | mddev->pers = pers; | |
36d091f4 | 5831 | spin_unlock(&mddev->lock); |
dafb20fa | 5832 | rdev_for_each(rdev, mddev) |
36fad858 | 5833 | if (rdev->raid_disk >= 0) |
e5b521ee | 5834 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 5835 | |
a4a3d26d N |
5836 | if (mddev->degraded && !mddev->ro) |
5837 | /* This ensures that recovering status is reported immediately | |
5838 | * via sysfs - until a lack of spares is confirmed. | |
5839 | */ | |
5840 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5841 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5842 | |
2953079c | 5843 | if (mddev->sb_flags) |
850b2b42 | 5844 | md_update_sb(mddev, 0); |
1da177e4 | 5845 | |
d7603b7e | 5846 | md_new_event(mddev); |
1da177e4 | 5847 | return 0; |
b126194c | 5848 | |
d494549a GJ |
5849 | bitmap_abort: |
5850 | mddev_detach(mddev); | |
5851 | if (mddev->private) | |
5852 | pers->free(mddev, mddev->private); | |
5853 | mddev->private = NULL; | |
5854 | module_put(pers->owner); | |
5855 | md_bitmap_destroy(mddev); | |
b126194c | 5856 | abort: |
4bc034d3 N |
5857 | bioset_exit(&mddev->bio_set); |
5858 | bioset_exit(&mddev->sync_set); | |
b126194c | 5859 | return err; |
1da177e4 | 5860 | } |
390ee602 | 5861 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5862 | |
fd01b88c | 5863 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5864 | { |
5865 | int err; | |
5866 | ||
9d4b45d6 | 5867 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
5868 | err = md_run(mddev); |
5869 | if (err) | |
5870 | goto out; | |
e64e4018 | 5871 | err = md_bitmap_load(mddev); |
69e51b44 | 5872 | if (err) { |
e64e4018 | 5873 | md_bitmap_destroy(mddev); |
69e51b44 N |
5874 | goto out; |
5875 | } | |
0fd018af | 5876 | |
28c1b9fd GR |
5877 | if (mddev_is_clustered(mddev)) |
5878 | md_allow_write(mddev); | |
5879 | ||
d5d885fd SL |
5880 | /* run start up tasks that require md_thread */ |
5881 | md_start(mddev); | |
5882 | ||
0fd018af JB |
5883 | md_wakeup_thread(mddev->thread); |
5884 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5885 | ||
fe60b014 N |
5886 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5887 | revalidate_disk(mddev->gendisk); | |
9d4b45d6 | 5888 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 5889 | mddev->changed = 1; |
fe60b014 | 5890 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
5891 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5892 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
5893 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
fe60b014 | 5894 | out: |
9d4b45d6 | 5895 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
5896 | return err; |
5897 | } | |
5898 | ||
d5d885fd SL |
5899 | int md_start(struct mddev *mddev) |
5900 | { | |
5901 | int ret = 0; | |
5902 | ||
5903 | if (mddev->pers->start) { | |
5904 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5905 | md_wakeup_thread(mddev->thread); | |
5906 | ret = mddev->pers->start(mddev); | |
5907 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5908 | md_wakeup_thread(mddev->sync_thread); | |
5909 | } | |
5910 | return ret; | |
5911 | } | |
5912 | EXPORT_SYMBOL_GPL(md_start); | |
5913 | ||
fd01b88c | 5914 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5915 | { |
5916 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
5917 | struct md_rdev *rdev; |
5918 | bool has_journal = false; | |
5919 | bool has_readonly = false; | |
1da177e4 | 5920 | |
80fab1d7 | 5921 | /* Complain if it has no devices */ |
1da177e4 | 5922 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5923 | return -ENXIO; |
5924 | if (!mddev->pers) | |
5925 | return -EINVAL; | |
5926 | if (!mddev->ro) | |
5927 | return -EBUSY; | |
339421de | 5928 | |
97b20ef7 N |
5929 | rcu_read_lock(); |
5930 | rdev_for_each_rcu(rdev, mddev) { | |
5931 | if (test_bit(Journal, &rdev->flags) && | |
5932 | !test_bit(Faulty, &rdev->flags)) | |
5933 | has_journal = true; | |
5934 | if (bdev_read_only(rdev->bdev)) | |
5935 | has_readonly = true; | |
5936 | } | |
5937 | rcu_read_unlock(); | |
5938 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 5939 | /* Don't restart rw with journal missing/faulty */ |
339421de | 5940 | return -EINVAL; |
97b20ef7 N |
5941 | if (has_readonly) |
5942 | return -EROFS; | |
339421de | 5943 | |
80fab1d7 AN |
5944 | mddev->safemode = 0; |
5945 | mddev->ro = 0; | |
5946 | set_disk_ro(disk, 0); | |
9d48739e | 5947 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5948 | /* Kick recovery or resync if necessary */ |
5949 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5950 | md_wakeup_thread(mddev->thread); | |
5951 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5952 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5953 | return 0; |
1da177e4 LT |
5954 | } |
5955 | ||
fd01b88c | 5956 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5957 | { |
5958 | mddev->array_sectors = 0; | |
5959 | mddev->external_size = 0; | |
5960 | mddev->dev_sectors = 0; | |
5961 | mddev->raid_disks = 0; | |
5962 | mddev->recovery_cp = 0; | |
5963 | mddev->resync_min = 0; | |
5964 | mddev->resync_max = MaxSector; | |
5965 | mddev->reshape_position = MaxSector; | |
5966 | mddev->external = 0; | |
5967 | mddev->persistent = 0; | |
5968 | mddev->level = LEVEL_NONE; | |
5969 | mddev->clevel[0] = 0; | |
5970 | mddev->flags = 0; | |
2953079c | 5971 | mddev->sb_flags = 0; |
6177b472 N |
5972 | mddev->ro = 0; |
5973 | mddev->metadata_type[0] = 0; | |
5974 | mddev->chunk_sectors = 0; | |
5975 | mddev->ctime = mddev->utime = 0; | |
5976 | mddev->layout = 0; | |
5977 | mddev->max_disks = 0; | |
5978 | mddev->events = 0; | |
a8707c08 | 5979 | mddev->can_decrease_events = 0; |
6177b472 | 5980 | mddev->delta_disks = 0; |
2c810cdd | 5981 | mddev->reshape_backwards = 0; |
6177b472 N |
5982 | mddev->new_level = LEVEL_NONE; |
5983 | mddev->new_layout = 0; | |
5984 | mddev->new_chunk_sectors = 0; | |
5985 | mddev->curr_resync = 0; | |
7f7583d4 | 5986 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5987 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5988 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5989 | mddev->recovery = 0; | |
5990 | mddev->in_sync = 0; | |
f0b4f7e2 | 5991 | mddev->changed = 0; |
6177b472 | 5992 | mddev->degraded = 0; |
6177b472 | 5993 | mddev->safemode = 0; |
bd691922 | 5994 | mddev->private = NULL; |
c20c33f0 | 5995 | mddev->cluster_info = NULL; |
6177b472 N |
5996 | mddev->bitmap_info.offset = 0; |
5997 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5998 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5999 | mddev->bitmap_info.chunksize = 0; |
6000 | mddev->bitmap_info.daemon_sleep = 0; | |
6001 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 6002 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
6003 | } |
6004 | ||
fd01b88c | 6005 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 6006 | { |
6b6204ee | 6007 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 6008 | flush_workqueue(md_misc_wq); |
a047e125 | 6009 | if (mddev->sync_thread) { |
a047e125 | 6010 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 6011 | md_reap_sync_thread(mddev); |
a047e125 N |
6012 | } |
6013 | ||
6014 | del_timer_sync(&mddev->safemode_timer); | |
6015 | ||
034e33f5 SL |
6016 | if (mddev->pers && mddev->pers->quiesce) { |
6017 | mddev->pers->quiesce(mddev, 1); | |
6018 | mddev->pers->quiesce(mddev, 0); | |
6019 | } | |
e64e4018 | 6020 | md_bitmap_flush(mddev); |
a047e125 | 6021 | |
b6d428c6 | 6022 | if (mddev->ro == 0 && |
28c1b9fd | 6023 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 6024 | mddev->sb_flags)) { |
a047e125 | 6025 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
6026 | if (!mddev_is_clustered(mddev)) |
6027 | mddev->in_sync = 1; | |
a047e125 N |
6028 | md_update_sb(mddev, 1); |
6029 | } | |
404659cf GJ |
6030 | mempool_destroy(mddev->serial_info_pool); |
6031 | mddev->serial_info_pool = NULL; | |
a047e125 | 6032 | } |
defad61a | 6033 | |
fd01b88c | 6034 | void md_stop_writes(struct mddev *mddev) |
defad61a | 6035 | { |
29f097c4 | 6036 | mddev_lock_nointr(mddev); |
defad61a N |
6037 | __md_stop_writes(mddev); |
6038 | mddev_unlock(mddev); | |
6039 | } | |
390ee602 | 6040 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6041 | |
5aa61f42 N |
6042 | static void mddev_detach(struct mddev *mddev) |
6043 | { | |
e64e4018 | 6044 | md_bitmap_wait_behind_writes(mddev); |
36d091f4 | 6045 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
6046 | mddev->pers->quiesce(mddev, 1); |
6047 | mddev->pers->quiesce(mddev, 0); | |
6048 | } | |
6049 | md_unregister_thread(&mddev->thread); | |
6050 | if (mddev->queue) | |
6051 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6052 | } | |
6053 | ||
5eff3c43 | 6054 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6055 | { |
36d091f4 | 6056 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6057 | md_bitmap_destroy(mddev); |
5aa61f42 | 6058 | mddev_detach(mddev); |
ee5d004f N |
6059 | /* Ensure ->event_work is done */ |
6060 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6061 | spin_lock(&mddev->lock); |
6177b472 | 6062 | mddev->pers = NULL; |
36d091f4 N |
6063 | spin_unlock(&mddev->lock); |
6064 | pers->free(mddev, mddev->private); | |
bd691922 | 6065 | mddev->private = NULL; |
36d091f4 N |
6066 | if (pers->sync_request && mddev->to_remove == NULL) |
6067 | mddev->to_remove = &md_redundancy_group; | |
6068 | module_put(pers->owner); | |
cca9cf90 | 6069 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6070 | } |
6071 | ||
6072 | void md_stop(struct mddev *mddev) | |
6073 | { | |
6074 | /* stop the array and free an attached data structures. | |
6075 | * This is called from dm-raid | |
6076 | */ | |
6077 | __md_stop(mddev); | |
afeee514 KO |
6078 | bioset_exit(&mddev->bio_set); |
6079 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6080 | } |
6081 | ||
390ee602 | 6082 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6083 | |
a05b7ea0 | 6084 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6085 | { |
6086 | int err = 0; | |
30b8feb7 N |
6087 | int did_freeze = 0; |
6088 | ||
6089 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6090 | did_freeze = 1; | |
6091 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6092 | md_wakeup_thread(mddev->thread); | |
6093 | } | |
f851b60d | 6094 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6095 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6096 | if (mddev->sync_thread) |
30b8feb7 N |
6097 | /* Thread might be blocked waiting for metadata update |
6098 | * which will now never happen */ | |
6099 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6100 | |
2953079c | 6101 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6102 | return -EBUSY; |
30b8feb7 | 6103 | mddev_unlock(mddev); |
f851b60d N |
6104 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6105 | &mddev->recovery)); | |
88724bfa | 6106 | wait_event(mddev->sb_wait, |
2953079c | 6107 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6108 | mddev_lock_nointr(mddev); |
6109 | ||
a4bd82d0 | 6110 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6111 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6112 | mddev->sync_thread || |
af8d8e6f | 6113 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6114 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6115 | if (did_freeze) { |
6116 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6117 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6118 | md_wakeup_thread(mddev->thread); |
6119 | } | |
a4bd82d0 N |
6120 | err = -EBUSY; |
6121 | goto out; | |
6122 | } | |
6123 | if (mddev->pers) { | |
defad61a | 6124 | __md_stop_writes(mddev); |
a4bd82d0 N |
6125 | |
6126 | err = -ENXIO; | |
6127 | if (mddev->ro==1) | |
6128 | goto out; | |
6129 | mddev->ro = 1; | |
6130 | set_disk_ro(mddev->gendisk, 1); | |
6131 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6132 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6133 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6134 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6135 | err = 0; |
a4bd82d0 N |
6136 | } |
6137 | out: | |
6138 | mutex_unlock(&mddev->open_mutex); | |
6139 | return err; | |
6140 | } | |
6141 | ||
9e653b63 N |
6142 | /* mode: |
6143 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6144 | * 2 - stop but do not disassemble array |
6145 | */ | |
f72ffdd6 | 6146 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6147 | struct block_device *bdev) |
1da177e4 | 6148 | { |
1da177e4 | 6149 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6150 | struct md_rdev *rdev; |
30b8feb7 N |
6151 | int did_freeze = 0; |
6152 | ||
6153 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6154 | did_freeze = 1; | |
6155 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6156 | md_wakeup_thread(mddev->thread); | |
6157 | } | |
f851b60d | 6158 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6159 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6160 | if (mddev->sync_thread) |
30b8feb7 N |
6161 | /* Thread might be blocked waiting for metadata update |
6162 | * which will now never happen */ | |
6163 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6164 | |
30b8feb7 | 6165 | mddev_unlock(mddev); |
f851b60d N |
6166 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6167 | !test_bit(MD_RECOVERY_RUNNING, | |
6168 | &mddev->recovery))); | |
30b8feb7 | 6169 | mddev_lock_nointr(mddev); |
1da177e4 | 6170 | |
c8c00a69 | 6171 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6172 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6173 | mddev->sysfs_active || |
6174 | mddev->sync_thread || | |
af8d8e6f | 6175 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6176 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6177 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6178 | if (did_freeze) { |
6179 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6180 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6181 | md_wakeup_thread(mddev->thread); |
6182 | } | |
260fa034 N |
6183 | return -EBUSY; |
6184 | } | |
6e17b027 | 6185 | if (mddev->pers) { |
a4bd82d0 N |
6186 | if (mddev->ro) |
6187 | set_disk_ro(disk, 0); | |
409c57f3 | 6188 | |
defad61a | 6189 | __md_stop_writes(mddev); |
5eff3c43 | 6190 | __md_stop(mddev); |
dc3b17cc | 6191 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 6192 | |
a4bd82d0 | 6193 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6194 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6195 | |
dafb20fa | 6196 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6197 | if (rdev->raid_disk >= 0) |
6198 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6199 | |
a4bd82d0 | 6200 | set_capacity(disk, 0); |
6e17b027 | 6201 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6202 | mddev->changed = 1; |
a4bd82d0 | 6203 | revalidate_disk(disk); |
0d4ca600 | 6204 | |
a4bd82d0 N |
6205 | if (mddev->ro) |
6206 | mddev->ro = 0; | |
6e17b027 N |
6207 | } else |
6208 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6209 | /* |
6210 | * Free resources if final stop | |
6211 | */ | |
9e653b63 | 6212 | if (mode == 0) { |
9d48739e | 6213 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6214 | |
c3d9714e | 6215 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6216 | struct file *f = mddev->bitmap_info.file; |
6217 | spin_lock(&mddev->lock); | |
c3d9714e | 6218 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6219 | spin_unlock(&mddev->lock); |
6220 | fput(f); | |
978f946b | 6221 | } |
c3d9714e | 6222 | mddev->bitmap_info.offset = 0; |
978f946b | 6223 | |
1da177e4 LT |
6224 | export_array(mddev); |
6225 | ||
6177b472 | 6226 | md_clean(mddev); |
efeb53c0 N |
6227 | if (mddev->hold_active == UNTIL_STOP) |
6228 | mddev->hold_active = 0; | |
a4bd82d0 | 6229 | } |
d7603b7e | 6230 | md_new_event(mddev); |
00bcb4ac | 6231 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6232 | return 0; |
1da177e4 LT |
6233 | } |
6234 | ||
fdee8ae4 | 6235 | #ifndef MODULE |
fd01b88c | 6236 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6237 | { |
3cb03002 | 6238 | struct md_rdev *rdev; |
1da177e4 LT |
6239 | int err; |
6240 | ||
a757e64c | 6241 | if (list_empty(&mddev->disks)) |
1da177e4 | 6242 | return; |
1da177e4 | 6243 | |
9d48739e | 6244 | pr_info("md: running: "); |
1da177e4 | 6245 | |
dafb20fa | 6246 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6247 | char b[BDEVNAME_SIZE]; |
9d48739e | 6248 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6249 | } |
9d48739e | 6250 | pr_cont("\n"); |
1da177e4 | 6251 | |
d710e138 | 6252 | err = do_md_run(mddev); |
1da177e4 | 6253 | if (err) { |
9d48739e | 6254 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6255 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6256 | } |
6257 | } | |
6258 | ||
6259 | /* | |
6260 | * lets try to run arrays based on all disks that have arrived | |
6261 | * until now. (those are in pending_raid_disks) | |
6262 | * | |
6263 | * the method: pick the first pending disk, collect all disks with | |
6264 | * the same UUID, remove all from the pending list and put them into | |
6265 | * the 'same_array' list. Then order this list based on superblock | |
6266 | * update time (freshest comes first), kick out 'old' disks and | |
6267 | * compare superblocks. If everything's fine then run it. | |
6268 | * | |
6269 | * If "unit" is allocated, then bump its reference count | |
6270 | */ | |
6271 | static void autorun_devices(int part) | |
6272 | { | |
3cb03002 | 6273 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6274 | struct mddev *mddev; |
1da177e4 LT |
6275 | char b[BDEVNAME_SIZE]; |
6276 | ||
9d48739e | 6277 | pr_info("md: autorun ...\n"); |
1da177e4 | 6278 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6279 | int unit; |
1da177e4 | 6280 | dev_t dev; |
ad01c9e3 | 6281 | LIST_HEAD(candidates); |
1da177e4 | 6282 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6283 | struct md_rdev, same_set); |
1da177e4 | 6284 | |
9d48739e | 6285 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6286 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6287 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6288 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6289 | pr_debug("md: adding %s ...\n", |
6290 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6291 | list_move(&rdev->same_set, &candidates); |
6292 | } | |
6293 | /* | |
6294 | * now we have a set of devices, with all of them having | |
6295 | * mostly sane superblocks. It's time to allocate the | |
6296 | * mddev. | |
6297 | */ | |
e8703fe1 N |
6298 | if (part) { |
6299 | dev = MKDEV(mdp_major, | |
6300 | rdev0->preferred_minor << MdpMinorShift); | |
6301 | unit = MINOR(dev) >> MdpMinorShift; | |
6302 | } else { | |
6303 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6304 | unit = MINOR(dev); | |
6305 | } | |
6306 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6307 | pr_warn("md: unit number in %s is bad: %d\n", |
6308 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6309 | break; |
6310 | } | |
1da177e4 LT |
6311 | |
6312 | md_probe(dev, NULL, NULL); | |
6313 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6314 | if (!mddev || !mddev->gendisk) { |
6315 | if (mddev) | |
6316 | mddev_put(mddev); | |
1da177e4 LT |
6317 | break; |
6318 | } | |
f72ffdd6 | 6319 | if (mddev_lock(mddev)) |
9d48739e | 6320 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6321 | else if (mddev->raid_disks || mddev->major_version |
6322 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6323 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6324 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6325 | mddev_unlock(mddev); | |
6326 | } else { | |
9d48739e | 6327 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6328 | mddev->persistent = 1; |
159ec1fc | 6329 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6330 | list_del_init(&rdev->same_set); |
6331 | if (bind_rdev_to_array(rdev, mddev)) | |
6332 | export_rdev(rdev); | |
6333 | } | |
6334 | autorun_array(mddev); | |
6335 | mddev_unlock(mddev); | |
6336 | } | |
6337 | /* on success, candidates will be empty, on error | |
6338 | * it won't... | |
6339 | */ | |
159ec1fc | 6340 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6341 | list_del_init(&rdev->same_set); |
1da177e4 | 6342 | export_rdev(rdev); |
4b80991c | 6343 | } |
1da177e4 LT |
6344 | mddev_put(mddev); |
6345 | } | |
9d48739e | 6346 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6347 | } |
fdee8ae4 | 6348 | #endif /* !MODULE */ |
1da177e4 | 6349 | |
f72ffdd6 | 6350 | static int get_version(void __user *arg) |
1da177e4 LT |
6351 | { |
6352 | mdu_version_t ver; | |
6353 | ||
6354 | ver.major = MD_MAJOR_VERSION; | |
6355 | ver.minor = MD_MINOR_VERSION; | |
6356 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6357 | ||
6358 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6359 | return -EFAULT; | |
6360 | ||
6361 | return 0; | |
6362 | } | |
6363 | ||
f72ffdd6 | 6364 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6365 | { |
6366 | mdu_array_info_t info; | |
a9f326eb | 6367 | int nr,working,insync,failed,spare; |
3cb03002 | 6368 | struct md_rdev *rdev; |
1da177e4 | 6369 | |
1ca69c4b N |
6370 | nr = working = insync = failed = spare = 0; |
6371 | rcu_read_lock(); | |
6372 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6373 | nr++; |
b2d444d7 | 6374 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6375 | failed++; |
6376 | else { | |
6377 | working++; | |
b2d444d7 | 6378 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6379 | insync++; |
b347af81 SL |
6380 | else if (test_bit(Journal, &rdev->flags)) |
6381 | /* TODO: add journal count to md_u.h */ | |
6382 | ; | |
1da177e4 LT |
6383 | else |
6384 | spare++; | |
6385 | } | |
6386 | } | |
1ca69c4b | 6387 | rcu_read_unlock(); |
1da177e4 LT |
6388 | |
6389 | info.major_version = mddev->major_version; | |
6390 | info.minor_version = mddev->minor_version; | |
6391 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6392 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6393 | info.level = mddev->level; |
58c0fed4 AN |
6394 | info.size = mddev->dev_sectors / 2; |
6395 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6396 | info.size = -1; |
1da177e4 LT |
6397 | info.nr_disks = nr; |
6398 | info.raid_disks = mddev->raid_disks; | |
6399 | info.md_minor = mddev->md_minor; | |
6400 | info.not_persistent= !mddev->persistent; | |
6401 | ||
9ebc6ef1 | 6402 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6403 | info.state = 0; |
6404 | if (mddev->in_sync) | |
6405 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6406 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6407 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6408 | if (mddev_is_clustered(mddev)) |
6409 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6410 | info.active_disks = insync; |
1da177e4 LT |
6411 | info.working_disks = working; |
6412 | info.failed_disks = failed; | |
6413 | info.spare_disks = spare; | |
6414 | ||
6415 | info.layout = mddev->layout; | |
9d8f0363 | 6416 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6417 | |
6418 | if (copy_to_user(arg, &info, sizeof(info))) | |
6419 | return -EFAULT; | |
6420 | ||
6421 | return 0; | |
6422 | } | |
6423 | ||
f72ffdd6 | 6424 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6425 | { |
6426 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6427 | char *ptr; |
4af1a041 | 6428 | int err; |
32a7627c | 6429 | |
b6878d9e | 6430 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6431 | if (!file) |
4af1a041 | 6432 | return -ENOMEM; |
32a7627c | 6433 | |
4af1a041 N |
6434 | err = 0; |
6435 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6436 | /* bitmap enabled */ |
6437 | if (mddev->bitmap_info.file) { | |
6438 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6439 | sizeof(file->pathname)); | |
6440 | if (IS_ERR(ptr)) | |
6441 | err = PTR_ERR(ptr); | |
6442 | else | |
6443 | memmove(file->pathname, ptr, | |
6444 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6445 | } | |
4af1a041 | 6446 | spin_unlock(&mddev->lock); |
32a7627c | 6447 | |
4af1a041 N |
6448 | if (err == 0 && |
6449 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6450 | err = -EFAULT; |
4af1a041 | 6451 | |
32a7627c N |
6452 | kfree(file); |
6453 | return err; | |
6454 | } | |
6455 | ||
f72ffdd6 | 6456 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6457 | { |
6458 | mdu_disk_info_t info; | |
3cb03002 | 6459 | struct md_rdev *rdev; |
1da177e4 LT |
6460 | |
6461 | if (copy_from_user(&info, arg, sizeof(info))) | |
6462 | return -EFAULT; | |
6463 | ||
1ca69c4b | 6464 | rcu_read_lock(); |
57d051dc | 6465 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6466 | if (rdev) { |
6467 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6468 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6469 | info.raid_disk = rdev->raid_disk; | |
6470 | info.state = 0; | |
b2d444d7 | 6471 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6472 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6473 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6474 | info.state |= (1<<MD_DISK_ACTIVE); |
6475 | info.state |= (1<<MD_DISK_SYNC); | |
6476 | } | |
9efdca16 | 6477 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6478 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6479 | if (test_bit(WriteMostly, &rdev->flags)) |
6480 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6481 | if (test_bit(FailFast, &rdev->flags)) |
6482 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6483 | } else { |
6484 | info.major = info.minor = 0; | |
6485 | info.raid_disk = -1; | |
6486 | info.state = (1<<MD_DISK_REMOVED); | |
6487 | } | |
1ca69c4b | 6488 | rcu_read_unlock(); |
1da177e4 LT |
6489 | |
6490 | if (copy_to_user(arg, &info, sizeof(info))) | |
6491 | return -EFAULT; | |
6492 | ||
6493 | return 0; | |
6494 | } | |
6495 | ||
f72ffdd6 | 6496 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6497 | { |
6498 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6499 | struct md_rdev *rdev; |
1da177e4 LT |
6500 | dev_t dev = MKDEV(info->major,info->minor); |
6501 | ||
1aee41f6 GR |
6502 | if (mddev_is_clustered(mddev) && |
6503 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6504 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6505 | mdname(mddev)); | |
1aee41f6 GR |
6506 | return -EINVAL; |
6507 | } | |
6508 | ||
1da177e4 LT |
6509 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6510 | return -EOVERFLOW; | |
6511 | ||
6512 | if (!mddev->raid_disks) { | |
6513 | int err; | |
6514 | /* expecting a device which has a superblock */ | |
6515 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6516 | if (IS_ERR(rdev)) { | |
9d48739e | 6517 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6518 | PTR_ERR(rdev)); |
6519 | return PTR_ERR(rdev); | |
6520 | } | |
6521 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6522 | struct md_rdev *rdev0 |
6523 | = list_entry(mddev->disks.next, | |
6524 | struct md_rdev, same_set); | |
a9f326eb | 6525 | err = super_types[mddev->major_version] |
1da177e4 LT |
6526 | .load_super(rdev, rdev0, mddev->minor_version); |
6527 | if (err < 0) { | |
9d48739e | 6528 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6529 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6530 | bdevname(rdev0->bdev,b2)); |
6531 | export_rdev(rdev); | |
6532 | return -EINVAL; | |
6533 | } | |
6534 | } | |
6535 | err = bind_rdev_to_array(rdev, mddev); | |
6536 | if (err) | |
6537 | export_rdev(rdev); | |
6538 | return err; | |
6539 | } | |
6540 | ||
6541 | /* | |
6542 | * add_new_disk can be used once the array is assembled | |
6543 | * to add "hot spares". They must already have a superblock | |
6544 | * written | |
6545 | */ | |
6546 | if (mddev->pers) { | |
6547 | int err; | |
6548 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6549 | pr_warn("%s: personality does not support diskops!\n", |
6550 | mdname(mddev)); | |
1da177e4 LT |
6551 | return -EINVAL; |
6552 | } | |
7b1e35f6 N |
6553 | if (mddev->persistent) |
6554 | rdev = md_import_device(dev, mddev->major_version, | |
6555 | mddev->minor_version); | |
6556 | else | |
6557 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6558 | if (IS_ERR(rdev)) { |
9d48739e | 6559 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6560 | PTR_ERR(rdev)); |
6561 | return PTR_ERR(rdev); | |
6562 | } | |
1a855a06 | 6563 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6564 | if (!mddev->persistent) { |
6565 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6566 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6567 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6568 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6569 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6570 | } else |
41158c7e | 6571 | rdev->raid_disk = -1; |
f466722c | 6572 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6573 | } else |
6574 | super_types[mddev->major_version]. | |
6575 | validate_super(mddev, rdev); | |
bedd86b7 | 6576 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6577 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6578 | /* This was a hot-add request, but events doesn't |
6579 | * match, so reject it. | |
6580 | */ | |
6581 | export_rdev(rdev); | |
6582 | return -EINVAL; | |
6583 | } | |
6584 | ||
b2d444d7 | 6585 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6586 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6587 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6588 | else |
6589 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6590 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6591 | set_bit(FailFast, &rdev->flags); | |
6592 | else | |
6593 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6594 | |
f6b6ec5c SL |
6595 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6596 | struct md_rdev *rdev2; | |
6597 | bool has_journal = false; | |
6598 | ||
6599 | /* make sure no existing journal disk */ | |
6600 | rdev_for_each(rdev2, mddev) { | |
6601 | if (test_bit(Journal, &rdev2->flags)) { | |
6602 | has_journal = true; | |
6603 | break; | |
6604 | } | |
6605 | } | |
230b55fa | 6606 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6607 | export_rdev(rdev); |
6608 | return -EBUSY; | |
6609 | } | |
bac624f3 | 6610 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6611 | } |
1aee41f6 GR |
6612 | /* |
6613 | * check whether the device shows up in other nodes | |
6614 | */ | |
6615 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6616 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6617 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6618 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6619 | /* --add initiated by this node */ |
dbb64f86 | 6620 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6621 | if (err) { |
1aee41f6 GR |
6622 | export_rdev(rdev); |
6623 | return err; | |
6624 | } | |
6625 | } | |
6626 | } | |
6627 | ||
1da177e4 LT |
6628 | rdev->raid_disk = -1; |
6629 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6630 | |
1da177e4 LT |
6631 | if (err) |
6632 | export_rdev(rdev); | |
dbb64f86 GR |
6633 | |
6634 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6635 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6636 | if (!err) { | |
6637 | err = md_cluster_ops->new_disk_ack(mddev, | |
6638 | err == 0); | |
6639 | if (err) | |
6640 | md_kick_rdev_from_array(rdev); | |
6641 | } | |
6642 | } else { | |
dbb64f86 GR |
6643 | if (err) |
6644 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6645 | else | |
6646 | err = add_bound_rdev(rdev); | |
6647 | } | |
6648 | ||
6649 | } else if (!err) | |
a6da4ef8 | 6650 | err = add_bound_rdev(rdev); |
dbb64f86 | 6651 | |
1da177e4 LT |
6652 | return err; |
6653 | } | |
6654 | ||
6655 | /* otherwise, add_new_disk is only allowed | |
6656 | * for major_version==0 superblocks | |
6657 | */ | |
6658 | if (mddev->major_version != 0) { | |
9d48739e | 6659 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6660 | return -EINVAL; |
6661 | } | |
6662 | ||
6663 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6664 | int err; | |
d710e138 | 6665 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6666 | if (IS_ERR(rdev)) { |
9d48739e | 6667 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6668 | PTR_ERR(rdev)); |
6669 | return PTR_ERR(rdev); | |
6670 | } | |
6671 | rdev->desc_nr = info->number; | |
6672 | if (info->raid_disk < mddev->raid_disks) | |
6673 | rdev->raid_disk = info->raid_disk; | |
6674 | else | |
6675 | rdev->raid_disk = -1; | |
6676 | ||
1da177e4 | 6677 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6678 | if (info->state & (1<<MD_DISK_SYNC)) |
6679 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6680 | |
8ddf9efe N |
6681 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6682 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6683 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6684 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6685 | |
1da177e4 | 6686 | if (!mddev->persistent) { |
9d48739e | 6687 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6688 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6689 | } else | |
57b2caa3 | 6690 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6691 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6692 | |
2bf071bf N |
6693 | err = bind_rdev_to_array(rdev, mddev); |
6694 | if (err) { | |
6695 | export_rdev(rdev); | |
6696 | return err; | |
6697 | } | |
1da177e4 LT |
6698 | } |
6699 | ||
6700 | return 0; | |
6701 | } | |
6702 | ||
f72ffdd6 | 6703 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6704 | { |
6705 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6706 | struct md_rdev *rdev; |
1da177e4 | 6707 | |
c42a0e26 YY |
6708 | if (!mddev->pers) |
6709 | return -ENODEV; | |
6710 | ||
1da177e4 LT |
6711 | rdev = find_rdev(mddev, dev); |
6712 | if (!rdev) | |
6713 | return -ENXIO; | |
6714 | ||
2910ff17 GR |
6715 | if (rdev->raid_disk < 0) |
6716 | goto kick_rdev; | |
293467aa | 6717 | |
3ea8929d N |
6718 | clear_bit(Blocked, &rdev->flags); |
6719 | remove_and_add_spares(mddev, rdev); | |
6720 | ||
1da177e4 LT |
6721 | if (rdev->raid_disk >= 0) |
6722 | goto busy; | |
6723 | ||
2910ff17 | 6724 | kick_rdev: |
54a88392 | 6725 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6726 | md_cluster_ops->remove_disk(mddev, rdev); |
6727 | ||
fb56dfef | 6728 | md_kick_rdev_from_array(rdev); |
2953079c | 6729 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6730 | if (mddev->thread) |
6731 | md_wakeup_thread(mddev->thread); | |
6732 | else | |
6733 | md_update_sb(mddev, 1); | |
d7603b7e | 6734 | md_new_event(mddev); |
1da177e4 LT |
6735 | |
6736 | return 0; | |
6737 | busy: | |
9d48739e N |
6738 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6739 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6740 | return -EBUSY; |
6741 | } | |
6742 | ||
f72ffdd6 | 6743 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6744 | { |
6745 | char b[BDEVNAME_SIZE]; | |
6746 | int err; | |
3cb03002 | 6747 | struct md_rdev *rdev; |
1da177e4 LT |
6748 | |
6749 | if (!mddev->pers) | |
6750 | return -ENODEV; | |
6751 | ||
6752 | if (mddev->major_version != 0) { | |
9d48739e | 6753 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6754 | mdname(mddev)); |
6755 | return -EINVAL; | |
6756 | } | |
6757 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6758 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6759 | mdname(mddev)); |
6760 | return -EINVAL; | |
6761 | } | |
6762 | ||
d710e138 | 6763 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6764 | if (IS_ERR(rdev)) { |
9d48739e | 6765 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6766 | PTR_ERR(rdev)); |
6767 | return -EINVAL; | |
6768 | } | |
6769 | ||
6770 | if (mddev->persistent) | |
57b2caa3 | 6771 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6772 | else |
77304d2a | 6773 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6774 | |
8190e754 | 6775 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6776 | |
b2d444d7 | 6777 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6778 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6779 | bdevname(rdev->bdev,b), mdname(mddev)); |
6780 | err = -EINVAL; | |
6781 | goto abort_export; | |
6782 | } | |
293467aa | 6783 | |
b2d444d7 | 6784 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6785 | rdev->desc_nr = -1; |
5842730d | 6786 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6787 | err = bind_rdev_to_array(rdev, mddev); |
6788 | if (err) | |
2aa82191 | 6789 | goto abort_export; |
1da177e4 LT |
6790 | |
6791 | /* | |
6792 | * The rest should better be atomic, we can have disk failures | |
6793 | * noticed in interrupt contexts ... | |
6794 | */ | |
6795 | ||
1da177e4 LT |
6796 | rdev->raid_disk = -1; |
6797 | ||
2953079c | 6798 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6799 | if (!mddev->thread) |
6800 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6801 | /* |
6802 | * Kick recovery, maybe this spare has to be added to the | |
6803 | * array immediately. | |
6804 | */ | |
6805 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6806 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6807 | md_new_event(mddev); |
1da177e4 LT |
6808 | return 0; |
6809 | ||
1da177e4 LT |
6810 | abort_export: |
6811 | export_rdev(rdev); | |
6812 | return err; | |
6813 | } | |
6814 | ||
fd01b88c | 6815 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6816 | { |
035328c2 | 6817 | int err = 0; |
32a7627c | 6818 | |
36fa3063 | 6819 | if (mddev->pers) { |
d66b1b39 | 6820 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6821 | return -EBUSY; |
6822 | if (mddev->recovery || mddev->sync_thread) | |
6823 | return -EBUSY; | |
6824 | /* we should be able to change the bitmap.. */ | |
6825 | } | |
32a7627c | 6826 | |
36fa3063 | 6827 | if (fd >= 0) { |
035328c2 | 6828 | struct inode *inode; |
1e594bb2 N |
6829 | struct file *f; |
6830 | ||
6831 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6832 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6833 | f = fget(fd); |
32a7627c | 6834 | |
1e594bb2 | 6835 | if (f == NULL) { |
9d48739e N |
6836 | pr_warn("%s: error: failed to get bitmap file\n", |
6837 | mdname(mddev)); | |
36fa3063 N |
6838 | return -EBADF; |
6839 | } | |
6840 | ||
1e594bb2 | 6841 | inode = f->f_mapping->host; |
035328c2 | 6842 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6843 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6844 | mdname(mddev)); | |
035328c2 | 6845 | err = -EBADF; |
1e594bb2 | 6846 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6847 | pr_warn("%s: error: bitmap file must open for write\n", |
6848 | mdname(mddev)); | |
035328c2 N |
6849 | err = -EBADF; |
6850 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6851 | pr_warn("%s: error: bitmap file is already in use\n", |
6852 | mdname(mddev)); | |
035328c2 N |
6853 | err = -EBUSY; |
6854 | } | |
6855 | if (err) { | |
1e594bb2 | 6856 | fput(f); |
36fa3063 N |
6857 | return err; |
6858 | } | |
1e594bb2 | 6859 | mddev->bitmap_info.file = f; |
c3d9714e | 6860 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6861 | } else if (mddev->bitmap == NULL) |
6862 | return -ENOENT; /* cannot remove what isn't there */ | |
6863 | err = 0; | |
6864 | if (mddev->pers) { | |
69e51b44 | 6865 | if (fd >= 0) { |
f9209a32 GR |
6866 | struct bitmap *bitmap; |
6867 | ||
e64e4018 | 6868 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 6869 | mddev_suspend(mddev); |
f9209a32 GR |
6870 | if (!IS_ERR(bitmap)) { |
6871 | mddev->bitmap = bitmap; | |
e64e4018 | 6872 | err = md_bitmap_load(mddev); |
ba599aca N |
6873 | } else |
6874 | err = PTR_ERR(bitmap); | |
52a0d49d | 6875 | if (err) { |
e64e4018 | 6876 | md_bitmap_destroy(mddev); |
52a0d49d N |
6877 | fd = -1; |
6878 | } | |
9e1cc0a5 | 6879 | mddev_resume(mddev); |
52a0d49d | 6880 | } else if (fd < 0) { |
9e1cc0a5 | 6881 | mddev_suspend(mddev); |
e64e4018 | 6882 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 6883 | mddev_resume(mddev); |
d7375ab3 | 6884 | } |
d7375ab3 N |
6885 | } |
6886 | if (fd < 0) { | |
4af1a041 N |
6887 | struct file *f = mddev->bitmap_info.file; |
6888 | if (f) { | |
6889 | spin_lock(&mddev->lock); | |
6890 | mddev->bitmap_info.file = NULL; | |
6891 | spin_unlock(&mddev->lock); | |
6892 | fput(f); | |
6893 | } | |
36fa3063 N |
6894 | } |
6895 | ||
32a7627c N |
6896 | return err; |
6897 | } | |
6898 | ||
1da177e4 LT |
6899 | /* |
6900 | * set_array_info is used two different ways | |
6901 | * The original usage is when creating a new array. | |
6902 | * In this usage, raid_disks is > 0 and it together with | |
6903 | * level, size, not_persistent,layout,chunksize determine the | |
6904 | * shape of the array. | |
6905 | * This will always create an array with a type-0.90.0 superblock. | |
6906 | * The newer usage is when assembling an array. | |
6907 | * In this case raid_disks will be 0, and the major_version field is | |
6908 | * use to determine which style super-blocks are to be found on the devices. | |
6909 | * The minor and patch _version numbers are also kept incase the | |
6910 | * super_block handler wishes to interpret them. | |
6911 | */ | |
f72ffdd6 | 6912 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6913 | { |
6914 | ||
6915 | if (info->raid_disks == 0) { | |
6916 | /* just setting version number for superblock loading */ | |
6917 | if (info->major_version < 0 || | |
50511da3 | 6918 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6919 | super_types[info->major_version].name == NULL) { |
6920 | /* maybe try to auto-load a module? */ | |
9d48739e | 6921 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6922 | info->major_version); |
6923 | return -EINVAL; | |
6924 | } | |
6925 | mddev->major_version = info->major_version; | |
6926 | mddev->minor_version = info->minor_version; | |
6927 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6928 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6929 | /* ensure mddev_put doesn't delete this now that there |
6930 | * is some minimal configuration. | |
6931 | */ | |
9ebc6ef1 | 6932 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6933 | return 0; |
6934 | } | |
6935 | mddev->major_version = MD_MAJOR_VERSION; | |
6936 | mddev->minor_version = MD_MINOR_VERSION; | |
6937 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6938 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6939 | |
6940 | mddev->level = info->level; | |
17115e03 | 6941 | mddev->clevel[0] = 0; |
58c0fed4 | 6942 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6943 | mddev->raid_disks = info->raid_disks; |
6944 | /* don't set md_minor, it is determined by which /dev/md* was | |
6945 | * openned | |
6946 | */ | |
6947 | if (info->state & (1<<MD_SB_CLEAN)) | |
6948 | mddev->recovery_cp = MaxSector; | |
6949 | else | |
6950 | mddev->recovery_cp = 0; | |
6951 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6952 | mddev->external = 0; |
1da177e4 LT |
6953 | |
6954 | mddev->layout = info->layout; | |
33f2c35a N |
6955 | if (mddev->level == 0) |
6956 | /* Cannot trust RAID0 layout info here */ | |
6957 | mddev->layout = -1; | |
9d8f0363 | 6958 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 6959 | |
2953079c | 6960 | if (mddev->persistent) { |
1b3bae49 N |
6961 | mddev->max_disks = MD_SB_DISKS; |
6962 | mddev->flags = 0; | |
6963 | mddev->sb_flags = 0; | |
2953079c SL |
6964 | } |
6965 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6966 | |
c3d9714e | 6967 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6968 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6969 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6970 | |
f6705578 N |
6971 | mddev->reshape_position = MaxSector; |
6972 | ||
1da177e4 LT |
6973 | /* |
6974 | * Generate a 128 bit UUID | |
6975 | */ | |
6976 | get_random_bytes(mddev->uuid, 16); | |
6977 | ||
f6705578 | 6978 | mddev->new_level = mddev->level; |
664e7c41 | 6979 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6980 | mddev->new_layout = mddev->layout; |
6981 | mddev->delta_disks = 0; | |
2c810cdd | 6982 | mddev->reshape_backwards = 0; |
f6705578 | 6983 | |
1da177e4 LT |
6984 | return 0; |
6985 | } | |
6986 | ||
fd01b88c | 6987 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6988 | { |
efa4b77b | 6989 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
6990 | |
6991 | if (mddev->external_size) | |
6992 | return; | |
6993 | ||
1f403624 DW |
6994 | mddev->array_sectors = array_sectors; |
6995 | } | |
6996 | EXPORT_SYMBOL(md_set_array_sectors); | |
6997 | ||
fd01b88c | 6998 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6999 | { |
3cb03002 | 7000 | struct md_rdev *rdev; |
a35b0d69 | 7001 | int rv; |
d71f9f88 | 7002 | int fit = (num_sectors == 0); |
818da59f | 7003 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 7004 | |
a35b0d69 N |
7005 | if (mddev->pers->resize == NULL) |
7006 | return -EINVAL; | |
d71f9f88 AN |
7007 | /* The "num_sectors" is the number of sectors of each device that |
7008 | * is used. This can only make sense for arrays with redundancy. | |
7009 | * linear and raid0 always use whatever space is available. We can only | |
7010 | * consider changing this number if no resync or reconstruction is | |
7011 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 7012 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
7013 | * of each device. If num_sectors is zero, we find the largest size |
7014 | * that fits. | |
a35b0d69 | 7015 | */ |
f851b60d N |
7016 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
7017 | mddev->sync_thread) | |
a35b0d69 | 7018 | return -EBUSY; |
bd8839e0 N |
7019 | if (mddev->ro) |
7020 | return -EROFS; | |
a4a6125a | 7021 | |
dafb20fa | 7022 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 7023 | sector_t avail = rdev->sectors; |
01ab5662 | 7024 | |
d71f9f88 AN |
7025 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
7026 | num_sectors = avail; | |
7027 | if (avail < num_sectors) | |
a35b0d69 N |
7028 | return -ENOSPC; |
7029 | } | |
d71f9f88 | 7030 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 7031 | if (!rv) { |
818da59f GJ |
7032 | if (mddev_is_clustered(mddev)) |
7033 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
7034 | else if (mddev->queue) { | |
c9483634 GJ |
7035 | set_capacity(mddev->gendisk, mddev->array_sectors); |
7036 | revalidate_disk(mddev->gendisk); | |
7037 | } | |
7038 | } | |
a35b0d69 N |
7039 | return rv; |
7040 | } | |
7041 | ||
fd01b88c | 7042 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7043 | { |
7044 | int rv; | |
c6563a8c | 7045 | struct md_rdev *rdev; |
da943b99 | 7046 | /* change the number of raid disks */ |
63c70c4f | 7047 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7048 | return -EINVAL; |
bd8839e0 N |
7049 | if (mddev->ro) |
7050 | return -EROFS; | |
da943b99 | 7051 | if (raid_disks <= 0 || |
233fca36 | 7052 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7053 | return -EINVAL; |
f851b60d N |
7054 | if (mddev->sync_thread || |
7055 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
7056 | mddev->reshape_position != MaxSector) | |
da943b99 | 7057 | return -EBUSY; |
c6563a8c N |
7058 | |
7059 | rdev_for_each(rdev, mddev) { | |
7060 | if (mddev->raid_disks < raid_disks && | |
7061 | rdev->data_offset < rdev->new_data_offset) | |
7062 | return -EINVAL; | |
7063 | if (mddev->raid_disks > raid_disks && | |
7064 | rdev->data_offset > rdev->new_data_offset) | |
7065 | return -EINVAL; | |
7066 | } | |
7067 | ||
63c70c4f | 7068 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7069 | if (mddev->delta_disks < 0) |
7070 | mddev->reshape_backwards = 1; | |
7071 | else if (mddev->delta_disks > 0) | |
7072 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7073 | |
7074 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7075 | if (rv < 0) { |
de171cb9 | 7076 | mddev->delta_disks = 0; |
2c810cdd N |
7077 | mddev->reshape_backwards = 0; |
7078 | } | |
da943b99 N |
7079 | return rv; |
7080 | } | |
7081 | ||
1da177e4 LT |
7082 | /* |
7083 | * update_array_info is used to change the configuration of an | |
7084 | * on-line array. | |
7085 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7086 | * fields in the info are checked against the array. | |
7087 | * Any differences that cannot be handled will cause an error. | |
7088 | * Normally, only one change can be managed at a time. | |
7089 | */ | |
fd01b88c | 7090 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7091 | { |
7092 | int rv = 0; | |
7093 | int cnt = 0; | |
36fa3063 N |
7094 | int state = 0; |
7095 | ||
7096 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7097 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7098 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7099 | |
7100 | if (mddev->major_version != info->major_version || | |
7101 | mddev->minor_version != info->minor_version || | |
7102 | /* mddev->patch_version != info->patch_version || */ | |
7103 | mddev->ctime != info->ctime || | |
7104 | mddev->level != info->level || | |
7105 | /* mddev->layout != info->layout || */ | |
4e023612 | 7106 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7107 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7108 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7109 | ((state^info->state) & 0xfffffe00) | |
7110 | ) | |
1da177e4 LT |
7111 | return -EINVAL; |
7112 | /* Check there is only one change */ | |
58c0fed4 AN |
7113 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7114 | cnt++; | |
7115 | if (mddev->raid_disks != info->raid_disks) | |
7116 | cnt++; | |
7117 | if (mddev->layout != info->layout) | |
7118 | cnt++; | |
7119 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7120 | cnt++; | |
7121 | if (cnt == 0) | |
7122 | return 0; | |
7123 | if (cnt > 1) | |
7124 | return -EINVAL; | |
1da177e4 LT |
7125 | |
7126 | if (mddev->layout != info->layout) { | |
7127 | /* Change layout | |
7128 | * we don't need to do anything at the md level, the | |
7129 | * personality will take care of it all. | |
7130 | */ | |
50ac168a | 7131 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7132 | return -EINVAL; |
597a711b N |
7133 | else { |
7134 | mddev->new_layout = info->layout; | |
50ac168a | 7135 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7136 | if (rv) |
7137 | mddev->new_layout = mddev->layout; | |
7138 | return rv; | |
7139 | } | |
1da177e4 | 7140 | } |
58c0fed4 | 7141 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7142 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7143 | |
da943b99 N |
7144 | if (mddev->raid_disks != info->raid_disks) |
7145 | rv = update_raid_disks(mddev, info->raid_disks); | |
7146 | ||
36fa3063 | 7147 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7148 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7149 | rv = -EINVAL; | |
7150 | goto err; | |
7151 | } | |
7152 | if (mddev->recovery || mddev->sync_thread) { | |
7153 | rv = -EBUSY; | |
7154 | goto err; | |
7155 | } | |
36fa3063 | 7156 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7157 | struct bitmap *bitmap; |
36fa3063 | 7158 | /* add the bitmap */ |
293467aa GR |
7159 | if (mddev->bitmap) { |
7160 | rv = -EEXIST; | |
7161 | goto err; | |
7162 | } | |
7163 | if (mddev->bitmap_info.default_offset == 0) { | |
7164 | rv = -EINVAL; | |
7165 | goto err; | |
7166 | } | |
c3d9714e N |
7167 | mddev->bitmap_info.offset = |
7168 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7169 | mddev->bitmap_info.space = |
7170 | mddev->bitmap_info.default_space; | |
e64e4018 | 7171 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7172 | mddev_suspend(mddev); |
f9209a32 GR |
7173 | if (!IS_ERR(bitmap)) { |
7174 | mddev->bitmap = bitmap; | |
e64e4018 | 7175 | rv = md_bitmap_load(mddev); |
ba599aca N |
7176 | } else |
7177 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7178 | if (rv) |
e64e4018 | 7179 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7180 | mddev_resume(mddev); |
36fa3063 N |
7181 | } else { |
7182 | /* remove the bitmap */ | |
293467aa GR |
7183 | if (!mddev->bitmap) { |
7184 | rv = -ENOENT; | |
7185 | goto err; | |
7186 | } | |
7187 | if (mddev->bitmap->storage.file) { | |
7188 | rv = -EINVAL; | |
7189 | goto err; | |
7190 | } | |
f6a2dc64 GJ |
7191 | if (mddev->bitmap_info.nodes) { |
7192 | /* hold PW on all the bitmap lock */ | |
7193 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7194 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7195 | rv = -EPERM; |
7196 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7197 | goto err; | |
7198 | } | |
7199 | ||
7200 | mddev->bitmap_info.nodes = 0; | |
7201 | md_cluster_ops->leave(mddev); | |
7202 | } | |
9e1cc0a5 | 7203 | mddev_suspend(mddev); |
e64e4018 | 7204 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7205 | mddev_resume(mddev); |
c3d9714e | 7206 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7207 | } |
7208 | } | |
850b2b42 | 7209 | md_update_sb(mddev, 1); |
293467aa GR |
7210 | return rv; |
7211 | err: | |
1da177e4 LT |
7212 | return rv; |
7213 | } | |
7214 | ||
fd01b88c | 7215 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7216 | { |
3cb03002 | 7217 | struct md_rdev *rdev; |
1ca69c4b | 7218 | int err = 0; |
1da177e4 LT |
7219 | |
7220 | if (mddev->pers == NULL) | |
7221 | return -ENODEV; | |
7222 | ||
1ca69c4b | 7223 | rcu_read_lock(); |
1532d9e8 | 7224 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7225 | if (!rdev) |
1ca69c4b N |
7226 | err = -ENODEV; |
7227 | else { | |
7228 | md_error(mddev, rdev); | |
7229 | if (!test_bit(Faulty, &rdev->flags)) | |
7230 | err = -EBUSY; | |
7231 | } | |
7232 | rcu_read_unlock(); | |
7233 | return err; | |
1da177e4 LT |
7234 | } |
7235 | ||
2f9618ce AN |
7236 | /* |
7237 | * We have a problem here : there is no easy way to give a CHS | |
7238 | * virtual geometry. We currently pretend that we have a 2 heads | |
7239 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7240 | * dosfs just mad... ;-) | |
7241 | */ | |
a885c8c4 CH |
7242 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7243 | { | |
fd01b88c | 7244 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7245 | |
7246 | geo->heads = 2; | |
7247 | geo->sectors = 4; | |
49ce6cea | 7248 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7249 | return 0; |
7250 | } | |
7251 | ||
cb335f88 NS |
7252 | static inline bool md_ioctl_valid(unsigned int cmd) |
7253 | { | |
7254 | switch (cmd) { | |
7255 | case ADD_NEW_DISK: | |
7256 | case BLKROSET: | |
7257 | case GET_ARRAY_INFO: | |
7258 | case GET_BITMAP_FILE: | |
7259 | case GET_DISK_INFO: | |
7260 | case HOT_ADD_DISK: | |
7261 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7262 | case RAID_AUTORUN: |
7263 | case RAID_VERSION: | |
7264 | case RESTART_ARRAY_RW: | |
7265 | case RUN_ARRAY: | |
7266 | case SET_ARRAY_INFO: | |
7267 | case SET_BITMAP_FILE: | |
7268 | case SET_DISK_FAULTY: | |
7269 | case STOP_ARRAY: | |
7270 | case STOP_ARRAY_RO: | |
1aee41f6 | 7271 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7272 | return true; |
7273 | default: | |
7274 | return false; | |
7275 | } | |
7276 | } | |
7277 | ||
a39907fa | 7278 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7279 | unsigned int cmd, unsigned long arg) |
7280 | { | |
7281 | int err = 0; | |
7282 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7283 | struct mddev *mddev = NULL; |
e2218350 | 7284 | int ro; |
065e519e | 7285 | bool did_set_md_closing = false; |
1da177e4 | 7286 | |
cb335f88 NS |
7287 | if (!md_ioctl_valid(cmd)) |
7288 | return -ENOTTY; | |
7289 | ||
506c9e44 N |
7290 | switch (cmd) { |
7291 | case RAID_VERSION: | |
7292 | case GET_ARRAY_INFO: | |
7293 | case GET_DISK_INFO: | |
7294 | break; | |
7295 | default: | |
7296 | if (!capable(CAP_SYS_ADMIN)) | |
7297 | return -EACCES; | |
7298 | } | |
1da177e4 LT |
7299 | |
7300 | /* | |
7301 | * Commands dealing with the RAID driver but not any | |
7302 | * particular array: | |
7303 | */ | |
c02c0aeb N |
7304 | switch (cmd) { |
7305 | case RAID_VERSION: | |
7306 | err = get_version(argp); | |
3adc28d8 | 7307 | goto out; |
1da177e4 | 7308 | |
1da177e4 | 7309 | #ifndef MODULE |
c02c0aeb N |
7310 | case RAID_AUTORUN: |
7311 | err = 0; | |
7312 | autostart_arrays(arg); | |
3adc28d8 | 7313 | goto out; |
1da177e4 | 7314 | #endif |
c02c0aeb | 7315 | default:; |
1da177e4 LT |
7316 | } |
7317 | ||
7318 | /* | |
7319 | * Commands creating/starting a new array: | |
7320 | */ | |
7321 | ||
a39907fa | 7322 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7323 | |
7324 | if (!mddev) { | |
7325 | BUG(); | |
3adc28d8 | 7326 | goto out; |
1da177e4 LT |
7327 | } |
7328 | ||
1ca69c4b N |
7329 | /* Some actions do not requires the mutex */ |
7330 | switch (cmd) { | |
7331 | case GET_ARRAY_INFO: | |
7332 | if (!mddev->raid_disks && !mddev->external) | |
7333 | err = -ENODEV; | |
7334 | else | |
7335 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7336 | goto out; |
1ca69c4b N |
7337 | |
7338 | case GET_DISK_INFO: | |
7339 | if (!mddev->raid_disks && !mddev->external) | |
7340 | err = -ENODEV; | |
7341 | else | |
7342 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7343 | goto out; |
1ca69c4b N |
7344 | |
7345 | case SET_DISK_FAULTY: | |
7346 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7347 | goto out; |
4af1a041 N |
7348 | |
7349 | case GET_BITMAP_FILE: | |
7350 | err = get_bitmap_file(mddev, argp); | |
7351 | goto out; | |
7352 | ||
1ca69c4b N |
7353 | } |
7354 | ||
a7a3f08d N |
7355 | if (cmd == ADD_NEW_DISK) |
7356 | /* need to ensure md_delayed_delete() has completed */ | |
7357 | flush_workqueue(md_misc_wq); | |
7358 | ||
90f5f7ad HR |
7359 | if (cmd == HOT_REMOVE_DISK) |
7360 | /* need to ensure recovery thread has run */ | |
7361 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7362 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7363 | &mddev->recovery), |
90f5f7ad | 7364 | msecs_to_jiffies(5000)); |
260fa034 N |
7365 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7366 | /* Need to flush page cache, and ensure no-one else opens | |
7367 | * and writes | |
7368 | */ | |
7369 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7370 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7371 | mutex_unlock(&mddev->open_mutex); |
7372 | err = -EBUSY; | |
3adc28d8 | 7373 | goto out; |
260fa034 | 7374 | } |
065e519e | 7375 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7376 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7377 | did_set_md_closing = true; |
260fa034 N |
7378 | mutex_unlock(&mddev->open_mutex); |
7379 | sync_blockdev(bdev); | |
7380 | } | |
1da177e4 LT |
7381 | err = mddev_lock(mddev); |
7382 | if (err) { | |
9d48739e N |
7383 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7384 | err, cmd); | |
3adc28d8 | 7385 | goto out; |
1da177e4 LT |
7386 | } |
7387 | ||
c02c0aeb N |
7388 | if (cmd == SET_ARRAY_INFO) { |
7389 | mdu_array_info_t info; | |
7390 | if (!arg) | |
7391 | memset(&info, 0, sizeof(info)); | |
7392 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7393 | err = -EFAULT; | |
3adc28d8 | 7394 | goto unlock; |
c02c0aeb N |
7395 | } |
7396 | if (mddev->pers) { | |
7397 | err = update_array_info(mddev, &info); | |
7398 | if (err) { | |
9d48739e | 7399 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7400 | goto unlock; |
1da177e4 | 7401 | } |
3adc28d8 | 7402 | goto unlock; |
c02c0aeb N |
7403 | } |
7404 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7405 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7406 | err = -EBUSY; |
3adc28d8 | 7407 | goto unlock; |
c02c0aeb N |
7408 | } |
7409 | if (mddev->raid_disks) { | |
9d48739e | 7410 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7411 | err = -EBUSY; |
3adc28d8 | 7412 | goto unlock; |
c02c0aeb N |
7413 | } |
7414 | err = set_array_info(mddev, &info); | |
7415 | if (err) { | |
9d48739e | 7416 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7417 | goto unlock; |
c02c0aeb | 7418 | } |
3adc28d8 | 7419 | goto unlock; |
1da177e4 LT |
7420 | } |
7421 | ||
7422 | /* | |
7423 | * Commands querying/configuring an existing array: | |
7424 | */ | |
32a7627c | 7425 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7426 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7427 | if ((!mddev->raid_disks && !mddev->external) |
7428 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7429 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7430 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7431 | err = -ENODEV; |
3adc28d8 | 7432 | goto unlock; |
1da177e4 LT |
7433 | } |
7434 | ||
7435 | /* | |
7436 | * Commands even a read-only array can execute: | |
7437 | */ | |
c02c0aeb | 7438 | switch (cmd) { |
c02c0aeb N |
7439 | case RESTART_ARRAY_RW: |
7440 | err = restart_array(mddev); | |
3adc28d8 | 7441 | goto unlock; |
1da177e4 | 7442 | |
c02c0aeb N |
7443 | case STOP_ARRAY: |
7444 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7445 | goto unlock; |
1da177e4 | 7446 | |
c02c0aeb N |
7447 | case STOP_ARRAY_RO: |
7448 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7449 | goto unlock; |
1da177e4 | 7450 | |
3ea8929d N |
7451 | case HOT_REMOVE_DISK: |
7452 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7453 | goto unlock; |
3ea8929d | 7454 | |
7ceb17e8 N |
7455 | case ADD_NEW_DISK: |
7456 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7457 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7458 | * So require mddev->pers and MD_DISK_SYNC. |
7459 | */ | |
7460 | if (mddev->pers) { | |
7461 | mdu_disk_info_t info; | |
7462 | if (copy_from_user(&info, argp, sizeof(info))) | |
7463 | err = -EFAULT; | |
7464 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7465 | /* Need to clear read-only for this */ | |
7466 | break; | |
7467 | else | |
7468 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7469 | goto unlock; |
7ceb17e8 N |
7470 | } |
7471 | break; | |
7472 | ||
c02c0aeb N |
7473 | case BLKROSET: |
7474 | if (get_user(ro, (int __user *)(arg))) { | |
7475 | err = -EFAULT; | |
3adc28d8 | 7476 | goto unlock; |
c02c0aeb N |
7477 | } |
7478 | err = -EINVAL; | |
e2218350 | 7479 | |
c02c0aeb N |
7480 | /* if the bdev is going readonly the value of mddev->ro |
7481 | * does not matter, no writes are coming | |
7482 | */ | |
7483 | if (ro) | |
3adc28d8 | 7484 | goto unlock; |
e2218350 | 7485 | |
c02c0aeb N |
7486 | /* are we are already prepared for writes? */ |
7487 | if (mddev->ro != 1) | |
3adc28d8 | 7488 | goto unlock; |
e2218350 | 7489 | |
c02c0aeb N |
7490 | /* transitioning to readauto need only happen for |
7491 | * arrays that call md_write_start | |
7492 | */ | |
7493 | if (mddev->pers) { | |
7494 | err = restart_array(mddev); | |
7495 | if (err == 0) { | |
7496 | mddev->ro = 2; | |
7497 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7498 | } |
c02c0aeb | 7499 | } |
3adc28d8 | 7500 | goto unlock; |
1da177e4 LT |
7501 | } |
7502 | ||
7503 | /* | |
7504 | * The remaining ioctls are changing the state of the | |
f91de92e | 7505 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7506 | */ |
326eb17d | 7507 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7508 | if (mddev->ro == 2) { |
7509 | mddev->ro = 0; | |
00bcb4ac | 7510 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7511 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7512 | /* mddev_unlock will wake thread */ |
7513 | /* If a device failed while we were read-only, we | |
7514 | * need to make sure the metadata is updated now. | |
7515 | */ | |
2953079c | 7516 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7517 | mddev_unlock(mddev); |
7518 | wait_event(mddev->sb_wait, | |
2953079c SL |
7519 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7520 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7521 | mddev_lock_nointr(mddev); |
f3378b48 | 7522 | } |
f91de92e N |
7523 | } else { |
7524 | err = -EROFS; | |
3adc28d8 | 7525 | goto unlock; |
f91de92e | 7526 | } |
1da177e4 LT |
7527 | } |
7528 | ||
c02c0aeb N |
7529 | switch (cmd) { |
7530 | case ADD_NEW_DISK: | |
1da177e4 | 7531 | { |
c02c0aeb N |
7532 | mdu_disk_info_t info; |
7533 | if (copy_from_user(&info, argp, sizeof(info))) | |
7534 | err = -EFAULT; | |
7535 | else | |
7536 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7537 | goto unlock; |
c02c0aeb | 7538 | } |
1da177e4 | 7539 | |
1aee41f6 GR |
7540 | case CLUSTERED_DISK_NACK: |
7541 | if (mddev_is_clustered(mddev)) | |
7542 | md_cluster_ops->new_disk_ack(mddev, false); | |
7543 | else | |
7544 | err = -EINVAL; | |
7545 | goto unlock; | |
7546 | ||
c02c0aeb N |
7547 | case HOT_ADD_DISK: |
7548 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7549 | goto unlock; |
1da177e4 | 7550 | |
c02c0aeb N |
7551 | case RUN_ARRAY: |
7552 | err = do_md_run(mddev); | |
3adc28d8 | 7553 | goto unlock; |
1da177e4 | 7554 | |
c02c0aeb N |
7555 | case SET_BITMAP_FILE: |
7556 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7557 | goto unlock; |
32a7627c | 7558 | |
c02c0aeb N |
7559 | default: |
7560 | err = -EINVAL; | |
3adc28d8 | 7561 | goto unlock; |
1da177e4 LT |
7562 | } |
7563 | ||
3adc28d8 | 7564 | unlock: |
d3374825 N |
7565 | if (mddev->hold_active == UNTIL_IOCTL && |
7566 | err != -EINVAL) | |
7567 | mddev->hold_active = 0; | |
1da177e4 | 7568 | mddev_unlock(mddev); |
3adc28d8 | 7569 | out: |
065e519e N |
7570 | if(did_set_md_closing) |
7571 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7572 | return err; |
7573 | } | |
aa98aa31 AB |
7574 | #ifdef CONFIG_COMPAT |
7575 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7576 | unsigned int cmd, unsigned long arg) | |
7577 | { | |
7578 | switch (cmd) { | |
7579 | case HOT_REMOVE_DISK: | |
7580 | case HOT_ADD_DISK: | |
7581 | case SET_DISK_FAULTY: | |
7582 | case SET_BITMAP_FILE: | |
7583 | /* These take in integer arg, do not convert */ | |
7584 | break; | |
7585 | default: | |
7586 | arg = (unsigned long)compat_ptr(arg); | |
7587 | break; | |
7588 | } | |
7589 | ||
7590 | return md_ioctl(bdev, mode, cmd, arg); | |
7591 | } | |
7592 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7593 | |
a39907fa | 7594 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7595 | { |
7596 | /* | |
7597 | * Succeed if we can lock the mddev, which confirms that | |
7598 | * it isn't being stopped right now. | |
7599 | */ | |
fd01b88c | 7600 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7601 | int err; |
7602 | ||
0c098220 YL |
7603 | if (!mddev) |
7604 | return -ENODEV; | |
7605 | ||
d3374825 N |
7606 | if (mddev->gendisk != bdev->bd_disk) { |
7607 | /* we are racing with mddev_put which is discarding this | |
7608 | * bd_disk. | |
7609 | */ | |
7610 | mddev_put(mddev); | |
7611 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7612 | flush_workqueue(md_misc_wq); |
d3374825 N |
7613 | /* Then retry the open from the top */ |
7614 | return -ERESTARTSYS; | |
7615 | } | |
7616 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7617 | ||
c8c00a69 | 7618 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7619 | goto out; |
7620 | ||
af8d8e6f GJ |
7621 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7622 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7623 | err = -ENODEV; |
7624 | goto out; | |
af8d8e6f GJ |
7625 | } |
7626 | ||
1da177e4 | 7627 | err = 0; |
f2ea68cf | 7628 | atomic_inc(&mddev->openers); |
c8c00a69 | 7629 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7630 | |
f0b4f7e2 | 7631 | check_disk_change(bdev); |
1da177e4 | 7632 | out: |
e2342ca8 N |
7633 | if (err) |
7634 | mddev_put(mddev); | |
1da177e4 LT |
7635 | return err; |
7636 | } | |
7637 | ||
db2a144b | 7638 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7639 | { |
f72ffdd6 | 7640 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7641 | |
52e5f9d1 | 7642 | BUG_ON(!mddev); |
f2ea68cf | 7643 | atomic_dec(&mddev->openers); |
1da177e4 | 7644 | mddev_put(mddev); |
1da177e4 | 7645 | } |
f0b4f7e2 N |
7646 | |
7647 | static int md_media_changed(struct gendisk *disk) | |
7648 | { | |
fd01b88c | 7649 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7650 | |
7651 | return mddev->changed; | |
7652 | } | |
7653 | ||
7654 | static int md_revalidate(struct gendisk *disk) | |
7655 | { | |
fd01b88c | 7656 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7657 | |
7658 | mddev->changed = 0; | |
7659 | return 0; | |
7660 | } | |
83d5cde4 | 7661 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7662 | { |
7663 | .owner = THIS_MODULE, | |
a39907fa AV |
7664 | .open = md_open, |
7665 | .release = md_release, | |
b492b852 | 7666 | .ioctl = md_ioctl, |
aa98aa31 AB |
7667 | #ifdef CONFIG_COMPAT |
7668 | .compat_ioctl = md_compat_ioctl, | |
7669 | #endif | |
a885c8c4 | 7670 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7671 | .media_changed = md_media_changed, |
7672 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7673 | }; |
7674 | ||
f72ffdd6 | 7675 | static int md_thread(void *arg) |
1da177e4 | 7676 | { |
2b8bf345 | 7677 | struct md_thread *thread = arg; |
1da177e4 | 7678 | |
1da177e4 LT |
7679 | /* |
7680 | * md_thread is a 'system-thread', it's priority should be very | |
7681 | * high. We avoid resource deadlocks individually in each | |
7682 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7683 | * the very same RT priority as kswapd, thus we will never get | |
7684 | * into a priority inversion deadlock. | |
7685 | * | |
7686 | * we definitely have to have equal or higher priority than | |
7687 | * bdflush, otherwise bdflush will deadlock if there are too | |
7688 | * many dirty RAID5 blocks. | |
7689 | */ | |
1da177e4 | 7690 | |
6985c43f | 7691 | allow_signal(SIGKILL); |
a6fb0934 | 7692 | while (!kthread_should_stop()) { |
1da177e4 | 7693 | |
93588e22 N |
7694 | /* We need to wait INTERRUPTIBLE so that |
7695 | * we don't add to the load-average. | |
7696 | * That means we need to be sure no signals are | |
7697 | * pending | |
7698 | */ | |
7699 | if (signal_pending(current)) | |
7700 | flush_signals(current); | |
7701 | ||
7702 | wait_event_interruptible_timeout | |
7703 | (thread->wqueue, | |
7704 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7705 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7706 | thread->timeout); |
1da177e4 | 7707 | |
6c987910 | 7708 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7709 | if (kthread_should_park()) |
7710 | kthread_parkme(); | |
6c987910 | 7711 | if (!kthread_should_stop()) |
4ed8731d | 7712 | thread->run(thread); |
1da177e4 | 7713 | } |
a6fb0934 | 7714 | |
1da177e4 LT |
7715 | return 0; |
7716 | } | |
7717 | ||
2b8bf345 | 7718 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7719 | { |
7720 | if (thread) { | |
36a4e1fe | 7721 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7722 | set_bit(THREAD_WAKEUP, &thread->flags); |
7723 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7724 | } |
7725 | } | |
6c144d31 | 7726 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7727 | |
4ed8731d SL |
7728 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7729 | struct mddev *mddev, const char *name) | |
1da177e4 | 7730 | { |
2b8bf345 | 7731 | struct md_thread *thread; |
1da177e4 | 7732 | |
2b8bf345 | 7733 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7734 | if (!thread) |
7735 | return NULL; | |
7736 | ||
1da177e4 LT |
7737 | init_waitqueue_head(&thread->wqueue); |
7738 | ||
1da177e4 LT |
7739 | thread->run = run; |
7740 | thread->mddev = mddev; | |
32a7627c | 7741 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7742 | thread->tsk = kthread_run(md_thread, thread, |
7743 | "%s_%s", | |
7744 | mdname(thread->mddev), | |
0232605d | 7745 | name); |
a6fb0934 | 7746 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7747 | kfree(thread); |
7748 | return NULL; | |
7749 | } | |
1da177e4 LT |
7750 | return thread; |
7751 | } | |
6c144d31 | 7752 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7753 | |
2b8bf345 | 7754 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7755 | { |
2b8bf345 | 7756 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7757 | if (!thread) |
7758 | return; | |
36a4e1fe | 7759 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7760 | /* Locking ensures that mddev_unlock does not wake_up a |
7761 | * non-existent thread | |
7762 | */ | |
7763 | spin_lock(&pers_lock); | |
7764 | *threadp = NULL; | |
7765 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7766 | |
7767 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7768 | kfree(thread); |
7769 | } | |
6c144d31 | 7770 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7771 | |
fd01b88c | 7772 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7773 | { |
b2d444d7 | 7774 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7775 | return; |
6bfe0b49 | 7776 | |
de393cde | 7777 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7778 | return; |
7779 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7780 | if (mddev->degraded) |
7781 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7782 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7783 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7784 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7785 | md_wakeup_thread(mddev->thread); | |
768a418d | 7786 | if (mddev->event_work.func) |
e804ac78 | 7787 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7788 | md_new_event(mddev); |
1da177e4 | 7789 | } |
6c144d31 | 7790 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7791 | |
7792 | /* seq_file implementation /proc/mdstat */ | |
7793 | ||
7794 | static void status_unused(struct seq_file *seq) | |
7795 | { | |
7796 | int i = 0; | |
3cb03002 | 7797 | struct md_rdev *rdev; |
1da177e4 LT |
7798 | |
7799 | seq_printf(seq, "unused devices: "); | |
7800 | ||
159ec1fc | 7801 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7802 | char b[BDEVNAME_SIZE]; |
7803 | i++; | |
7804 | seq_printf(seq, "%s ", | |
7805 | bdevname(rdev->bdev,b)); | |
7806 | } | |
7807 | if (!i) | |
7808 | seq_printf(seq, "<none>"); | |
7809 | ||
7810 | seq_printf(seq, "\n"); | |
7811 | } | |
7812 | ||
f7851be7 | 7813 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7814 | { |
dd71cf6b | 7815 | sector_t max_sectors, resync, res; |
9642fa73 MT |
7816 | unsigned long dt, db = 0; |
7817 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
7818 | int scale, recovery_active; | |
4588b42e | 7819 | unsigned int per_milli; |
1da177e4 | 7820 | |
c804cdec N |
7821 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7822 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7823 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7824 | else |
dd71cf6b | 7825 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7826 | |
f7851be7 N |
7827 | resync = mddev->curr_resync; |
7828 | if (resync <= 3) { | |
7829 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7830 | /* Still cleaning up */ | |
7831 | resync = max_sectors; | |
d2e2ec82 ND |
7832 | } else if (resync > max_sectors) |
7833 | resync = max_sectors; | |
7834 | else | |
f7851be7 N |
7835 | resync -= atomic_read(&mddev->recovery_active); |
7836 | ||
7837 | if (resync == 0) { | |
0357ba27 GJ |
7838 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
7839 | struct md_rdev *rdev; | |
7840 | ||
7841 | rdev_for_each(rdev, mddev) | |
7842 | if (rdev->raid_disk >= 0 && | |
7843 | !test_bit(Faulty, &rdev->flags) && | |
7844 | rdev->recovery_offset != MaxSector && | |
7845 | rdev->recovery_offset) { | |
7846 | seq_printf(seq, "\trecover=REMOTE"); | |
7847 | return 1; | |
7848 | } | |
7849 | if (mddev->reshape_position != MaxSector) | |
7850 | seq_printf(seq, "\treshape=REMOTE"); | |
7851 | else | |
7852 | seq_printf(seq, "\tresync=REMOTE"); | |
7853 | return 1; | |
7854 | } | |
f7851be7 N |
7855 | if (mddev->recovery_cp < MaxSector) { |
7856 | seq_printf(seq, "\tresync=PENDING"); | |
7857 | return 1; | |
7858 | } | |
7859 | return 0; | |
7860 | } | |
7861 | if (resync < 3) { | |
7862 | seq_printf(seq, "\tresync=DELAYED"); | |
7863 | return 1; | |
7864 | } | |
7865 | ||
403df478 | 7866 | WARN_ON(max_sectors == 0); |
4588b42e | 7867 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7868 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7869 | * u32, as those are the requirements for sector_div. |
7870 | * Thus 'scale' must be at least 10 | |
7871 | */ | |
7872 | scale = 10; | |
7873 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7874 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7875 | scale++; |
7876 | } | |
7877 | res = (resync>>scale)*1000; | |
dd71cf6b | 7878 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7879 | |
7880 | per_milli = res; | |
1da177e4 | 7881 | { |
4588b42e | 7882 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7883 | seq_printf(seq, "["); |
7884 | for (i = 0; i < x; i++) | |
7885 | seq_printf(seq, "="); | |
7886 | seq_printf(seq, ">"); | |
7887 | for (i = 0; i < y; i++) | |
7888 | seq_printf(seq, "."); | |
7889 | seq_printf(seq, "] "); | |
7890 | } | |
4588b42e | 7891 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7892 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7893 | "reshape" : | |
61df9d91 N |
7894 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7895 | "check" : | |
7896 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7897 | "resync" : "recovery"))), | |
7898 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7899 | (unsigned long long) resync/2, |
7900 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7901 | |
7902 | /* | |
1da177e4 LT |
7903 | * dt: time from mark until now |
7904 | * db: blocks written from mark until now | |
7905 | * rt: remaining time | |
dd71cf6b | 7906 | * |
9642fa73 MT |
7907 | * rt is a sector_t, which is always 64bit now. We are keeping |
7908 | * the original algorithm, but it is not really necessary. | |
7909 | * | |
7910 | * Original algorithm: | |
7911 | * So we divide before multiply in case it is 32bit and close | |
7912 | * to the limit. | |
7913 | * We scale the divisor (db) by 32 to avoid losing precision | |
7914 | * near the end of resync when the number of remaining sectors | |
7915 | * is close to 'db'. | |
7916 | * We then divide rt by 32 after multiplying by db to compensate. | |
7917 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7918 | */ |
7919 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7920 | if (!dt) dt++; | |
9642fa73 MT |
7921 | |
7922 | curr_mark_cnt = mddev->curr_mark_cnt; | |
7923 | recovery_active = atomic_read(&mddev->recovery_active); | |
7924 | resync_mark_cnt = mddev->resync_mark_cnt; | |
7925 | ||
7926 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
7927 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 7928 | |
dd71cf6b | 7929 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 7930 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
7931 | rt *= dt; |
7932 | rt >>= 5; | |
7933 | ||
7934 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7935 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7936 | |
ff4e8d9a | 7937 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7938 | return 1; |
1da177e4 LT |
7939 | } |
7940 | ||
7941 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7942 | { | |
7943 | struct list_head *tmp; | |
7944 | loff_t l = *pos; | |
fd01b88c | 7945 | struct mddev *mddev; |
1da177e4 LT |
7946 | |
7947 | if (l >= 0x10000) | |
7948 | return NULL; | |
7949 | if (!l--) | |
7950 | /* header */ | |
7951 | return (void*)1; | |
7952 | ||
7953 | spin_lock(&all_mddevs_lock); | |
7954 | list_for_each(tmp,&all_mddevs) | |
7955 | if (!l--) { | |
fd01b88c | 7956 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7957 | mddev_get(mddev); |
7958 | spin_unlock(&all_mddevs_lock); | |
7959 | return mddev; | |
7960 | } | |
7961 | spin_unlock(&all_mddevs_lock); | |
7962 | if (!l--) | |
7963 | return (void*)2;/* tail */ | |
7964 | return NULL; | |
7965 | } | |
7966 | ||
7967 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7968 | { | |
7969 | struct list_head *tmp; | |
fd01b88c | 7970 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7971 | |
1da177e4 LT |
7972 | ++*pos; |
7973 | if (v == (void*)2) | |
7974 | return NULL; | |
7975 | ||
7976 | spin_lock(&all_mddevs_lock); | |
7977 | if (v == (void*)1) | |
7978 | tmp = all_mddevs.next; | |
7979 | else | |
7980 | tmp = mddev->all_mddevs.next; | |
7981 | if (tmp != &all_mddevs) | |
fd01b88c | 7982 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7983 | else { |
7984 | next_mddev = (void*)2; | |
7985 | *pos = 0x10000; | |
f72ffdd6 | 7986 | } |
1da177e4 LT |
7987 | spin_unlock(&all_mddevs_lock); |
7988 | ||
7989 | if (v != (void*)1) | |
7990 | mddev_put(mddev); | |
7991 | return next_mddev; | |
7992 | ||
7993 | } | |
7994 | ||
7995 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7996 | { | |
fd01b88c | 7997 | struct mddev *mddev = v; |
1da177e4 LT |
7998 | |
7999 | if (mddev && v != (void*)1 && v != (void*)2) | |
8000 | mddev_put(mddev); | |
8001 | } | |
8002 | ||
8003 | static int md_seq_show(struct seq_file *seq, void *v) | |
8004 | { | |
fd01b88c | 8005 | struct mddev *mddev = v; |
dd8ac336 | 8006 | sector_t sectors; |
3cb03002 | 8007 | struct md_rdev *rdev; |
1da177e4 LT |
8008 | |
8009 | if (v == (void*)1) { | |
84fc4b56 | 8010 | struct md_personality *pers; |
1da177e4 LT |
8011 | seq_printf(seq, "Personalities : "); |
8012 | spin_lock(&pers_lock); | |
2604b703 N |
8013 | list_for_each_entry(pers, &pers_list, list) |
8014 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
8015 | |
8016 | spin_unlock(&pers_lock); | |
8017 | seq_printf(seq, "\n"); | |
f1514638 | 8018 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
8019 | return 0; |
8020 | } | |
8021 | if (v == (void*)2) { | |
8022 | status_unused(seq); | |
8023 | return 0; | |
8024 | } | |
8025 | ||
36d091f4 | 8026 | spin_lock(&mddev->lock); |
1da177e4 LT |
8027 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
8028 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
8029 | mddev->pers ? "" : "in"); | |
8030 | if (mddev->pers) { | |
f91de92e | 8031 | if (mddev->ro==1) |
1da177e4 | 8032 | seq_printf(seq, " (read-only)"); |
f91de92e | 8033 | if (mddev->ro==2) |
52720ae7 | 8034 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
8035 | seq_printf(seq, " %s", mddev->pers->name); |
8036 | } | |
8037 | ||
dd8ac336 | 8038 | sectors = 0; |
f97fcad3 N |
8039 | rcu_read_lock(); |
8040 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8041 | char b[BDEVNAME_SIZE]; |
8042 | seq_printf(seq, " %s[%d]", | |
8043 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8044 | if (test_bit(WriteMostly, &rdev->flags)) |
8045 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8046 | if (test_bit(Journal, &rdev->flags)) |
8047 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8048 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8049 | seq_printf(seq, "(F)"); |
8050 | continue; | |
2d78f8c4 N |
8051 | } |
8052 | if (rdev->raid_disk < 0) | |
b325a32e | 8053 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8054 | if (test_bit(Replacement, &rdev->flags)) |
8055 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8056 | sectors += rdev->sectors; |
1da177e4 | 8057 | } |
f97fcad3 | 8058 | rcu_read_unlock(); |
1da177e4 LT |
8059 | |
8060 | if (!list_empty(&mddev->disks)) { | |
8061 | if (mddev->pers) | |
8062 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8063 | (unsigned long long) |
8064 | mddev->array_sectors / 2); | |
1da177e4 LT |
8065 | else |
8066 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8067 | (unsigned long long)sectors / 2); |
1da177e4 | 8068 | } |
1cd6bf19 N |
8069 | if (mddev->persistent) { |
8070 | if (mddev->major_version != 0 || | |
8071 | mddev->minor_version != 90) { | |
8072 | seq_printf(seq," super %d.%d", | |
8073 | mddev->major_version, | |
8074 | mddev->minor_version); | |
8075 | } | |
e691063a N |
8076 | } else if (mddev->external) |
8077 | seq_printf(seq, " super external:%s", | |
8078 | mddev->metadata_type); | |
8079 | else | |
1cd6bf19 | 8080 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8081 | |
8082 | if (mddev->pers) { | |
d710e138 | 8083 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8084 | seq_printf(seq, "\n "); |
8e1b39d6 | 8085 | if (mddev->pers->sync_request) { |
f7851be7 | 8086 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8087 | seq_printf(seq, "\n "); |
8e1b39d6 | 8088 | } |
32a7627c N |
8089 | } else |
8090 | seq_printf(seq, "\n "); | |
8091 | ||
e64e4018 | 8092 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8093 | |
8094 | seq_printf(seq, "\n"); | |
8095 | } | |
36d091f4 | 8096 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8097 | |
1da177e4 LT |
8098 | return 0; |
8099 | } | |
8100 | ||
110518bc | 8101 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8102 | .start = md_seq_start, |
8103 | .next = md_seq_next, | |
8104 | .stop = md_seq_stop, | |
8105 | .show = md_seq_show, | |
8106 | }; | |
8107 | ||
8108 | static int md_seq_open(struct inode *inode, struct file *file) | |
8109 | { | |
f1514638 | 8110 | struct seq_file *seq; |
1da177e4 LT |
8111 | int error; |
8112 | ||
8113 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8114 | if (error) |
f1514638 KS |
8115 | return error; |
8116 | ||
8117 | seq = file->private_data; | |
8118 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8119 | return error; |
8120 | } | |
8121 | ||
e2f23b60 | 8122 | static int md_unloading; |
afc9a42b | 8123 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8124 | { |
f1514638 | 8125 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8126 | __poll_t mask; |
d7603b7e | 8127 | |
e2f23b60 | 8128 | if (md_unloading) |
a9a08845 | 8129 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8130 | poll_wait(filp, &md_event_waiters, wait); |
8131 | ||
8132 | /* always allow read */ | |
a9a08845 | 8133 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8134 | |
f1514638 | 8135 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8136 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8137 | return mask; |
8138 | } | |
8139 | ||
fa027c2a | 8140 | static const struct file_operations md_seq_fops = { |
e24650c2 | 8141 | .owner = THIS_MODULE, |
1da177e4 LT |
8142 | .open = md_seq_open, |
8143 | .read = seq_read, | |
8144 | .llseek = seq_lseek, | |
26e13043 | 8145 | .release = seq_release, |
d7603b7e | 8146 | .poll = mdstat_poll, |
1da177e4 LT |
8147 | }; |
8148 | ||
84fc4b56 | 8149 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8150 | { |
9d48739e N |
8151 | pr_debug("md: %s personality registered for level %d\n", |
8152 | p->name, p->level); | |
1da177e4 | 8153 | spin_lock(&pers_lock); |
2604b703 | 8154 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8155 | spin_unlock(&pers_lock); |
8156 | return 0; | |
8157 | } | |
6c144d31 | 8158 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8159 | |
84fc4b56 | 8160 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8161 | { |
9d48739e | 8162 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8163 | spin_lock(&pers_lock); |
2604b703 | 8164 | list_del_init(&p->list); |
1da177e4 LT |
8165 | spin_unlock(&pers_lock); |
8166 | return 0; | |
8167 | } | |
6c144d31 | 8168 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8169 | |
6022e75b N |
8170 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8171 | struct module *module) | |
edb39c9d | 8172 | { |
6022e75b | 8173 | int ret = 0; |
edb39c9d | 8174 | spin_lock(&pers_lock); |
6022e75b N |
8175 | if (md_cluster_ops != NULL) |
8176 | ret = -EALREADY; | |
8177 | else { | |
8178 | md_cluster_ops = ops; | |
8179 | md_cluster_mod = module; | |
8180 | } | |
edb39c9d | 8181 | spin_unlock(&pers_lock); |
6022e75b | 8182 | return ret; |
edb39c9d GR |
8183 | } |
8184 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8185 | ||
8186 | int unregister_md_cluster_operations(void) | |
8187 | { | |
8188 | spin_lock(&pers_lock); | |
8189 | md_cluster_ops = NULL; | |
8190 | spin_unlock(&pers_lock); | |
8191 | return 0; | |
8192 | } | |
8193 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8194 | ||
8195 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8196 | { | |
47a7b0d8 GJ |
8197 | if (!md_cluster_ops) |
8198 | request_module("md-cluster"); | |
edb39c9d | 8199 | spin_lock(&pers_lock); |
47a7b0d8 | 8200 | /* ensure module won't be unloaded */ |
edb39c9d | 8201 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8202 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8203 | spin_unlock(&pers_lock); |
8204 | return -ENOENT; | |
8205 | } | |
8206 | spin_unlock(&pers_lock); | |
8207 | ||
cf921cc1 | 8208 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
8209 | } |
8210 | ||
8211 | void md_cluster_stop(struct mddev *mddev) | |
8212 | { | |
c4ce867f GR |
8213 | if (!md_cluster_ops) |
8214 | return; | |
edb39c9d GR |
8215 | md_cluster_ops->leave(mddev); |
8216 | module_put(md_cluster_mod); | |
8217 | } | |
8218 | ||
fd01b88c | 8219 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8220 | { |
f72ffdd6 | 8221 | struct md_rdev *rdev; |
1da177e4 | 8222 | int idle; |
eea1bf38 | 8223 | int curr_events; |
1da177e4 LT |
8224 | |
8225 | idle = 1; | |
4b80991c N |
8226 | rcu_read_lock(); |
8227 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8228 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
59767fbd | 8229 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8230 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8231 | /* sync IO will cause sync_io to increase before the disk_stats |
8232 | * as sync_io is counted when a request starts, and | |
8233 | * disk_stats is counted when it completes. | |
8234 | * So resync activity will cause curr_events to be smaller than | |
8235 | * when there was no such activity. | |
8236 | * non-sync IO will cause disk_stat to increase without | |
8237 | * increasing sync_io so curr_events will (eventually) | |
8238 | * be larger than it was before. Once it becomes | |
8239 | * substantially larger, the test below will cause | |
8240 | * the array to appear non-idle, and resync will slow | |
8241 | * down. | |
8242 | * If there is a lot of outstanding resync activity when | |
8243 | * we set last_event to curr_events, then all that activity | |
8244 | * completing might cause the array to appear non-idle | |
8245 | * and resync will be slowed down even though there might | |
8246 | * not have been non-resync activity. This will only | |
8247 | * happen once though. 'last_events' will soon reflect | |
8248 | * the state where there is little or no outstanding | |
8249 | * resync requests, and further resync activity will | |
8250 | * always make curr_events less than last_events. | |
c0e48521 | 8251 | * |
1da177e4 | 8252 | */ |
eea1bf38 | 8253 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8254 | rdev->last_events = curr_events; |
8255 | idle = 0; | |
8256 | } | |
8257 | } | |
4b80991c | 8258 | rcu_read_unlock(); |
1da177e4 LT |
8259 | return idle; |
8260 | } | |
8261 | ||
fd01b88c | 8262 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8263 | { |
8264 | /* another "blocks" (512byte) blocks have been synced */ | |
8265 | atomic_sub(blocks, &mddev->recovery_active); | |
8266 | wake_up(&mddev->recovery_wait); | |
8267 | if (!ok) { | |
dfc70645 | 8268 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8269 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8270 | md_wakeup_thread(mddev->thread); |
8271 | // stop recovery, signal do_sync .... | |
8272 | } | |
8273 | } | |
6c144d31 | 8274 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8275 | |
06d91a5f N |
8276 | /* md_write_start(mddev, bi) |
8277 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8278 | * in superblock) before writing, schedule a superblock update |
8279 | * and wait for it to complete. | |
cc27b0c7 N |
8280 | * A return value of 'false' means that the write wasn't recorded |
8281 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8282 | */ |
cc27b0c7 | 8283 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8284 | { |
0fd62b86 | 8285 | int did_change = 0; |
4b6c1060 | 8286 | |
06d91a5f | 8287 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8288 | return true; |
06d91a5f | 8289 | |
f91de92e N |
8290 | BUG_ON(mddev->ro == 1); |
8291 | if (mddev->ro == 2) { | |
8292 | /* need to switch to read/write */ | |
8293 | mddev->ro = 0; | |
8294 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8295 | md_wakeup_thread(mddev->thread); | |
25156198 | 8296 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8297 | did_change = 1; |
f91de92e | 8298 | } |
4ad23a97 N |
8299 | rcu_read_lock(); |
8300 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8301 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8302 | if (mddev->safemode == 1) |
8303 | mddev->safemode = 0; | |
4ad23a97 | 8304 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8305 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8306 | spin_lock(&mddev->lock); |
3d310eb7 N |
8307 | if (mddev->in_sync) { |
8308 | mddev->in_sync = 0; | |
2953079c SL |
8309 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8310 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8311 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8312 | did_change = 1; |
3d310eb7 | 8313 | } |
85572d7c | 8314 | spin_unlock(&mddev->lock); |
06d91a5f | 8315 | } |
4ad23a97 | 8316 | rcu_read_unlock(); |
0fd62b86 | 8317 | if (did_change) |
00bcb4ac | 8318 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8319 | if (!mddev->has_superblocks) |
8320 | return true; | |
09a44cc1 | 8321 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8322 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8323 | mddev->suspended); | |
cc27b0c7 N |
8324 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8325 | percpu_ref_put(&mddev->writes_pending); | |
8326 | return false; | |
8327 | } | |
8328 | return true; | |
1da177e4 | 8329 | } |
6c144d31 | 8330 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8331 | |
49728050 N |
8332 | /* md_write_inc can only be called when md_write_start() has |
8333 | * already been called at least once of the current request. | |
8334 | * It increments the counter and is useful when a single request | |
8335 | * is split into several parts. Each part causes an increment and | |
8336 | * so needs a matching md_write_end(). | |
8337 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8338 | * a spinlocked region. | |
8339 | */ | |
8340 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8341 | { | |
8342 | if (bio_data_dir(bi) != WRITE) | |
8343 | return; | |
8344 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8345 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8346 | } |
8347 | EXPORT_SYMBOL(md_write_inc); | |
8348 | ||
fd01b88c | 8349 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8350 | { |
4ad23a97 N |
8351 | percpu_ref_put(&mddev->writes_pending); |
8352 | ||
8353 | if (mddev->safemode == 2) | |
8354 | md_wakeup_thread(mddev->thread); | |
8355 | else if (mddev->safemode_delay) | |
8356 | /* The roundup() ensures this only performs locking once | |
8357 | * every ->safemode_delay jiffies | |
8358 | */ | |
8359 | mod_timer(&mddev->safemode_timer, | |
8360 | roundup(jiffies, mddev->safemode_delay) + | |
8361 | mddev->safemode_delay); | |
1da177e4 | 8362 | } |
4ad23a97 | 8363 | |
6c144d31 | 8364 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8365 | |
2a2275d6 N |
8366 | /* md_allow_write(mddev) |
8367 | * Calling this ensures that the array is marked 'active' so that writes | |
8368 | * may proceed without blocking. It is important to call this before | |
8369 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8370 | * Must be called with mddev_lock held. | |
8371 | */ | |
2214c260 | 8372 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8373 | { |
8374 | if (!mddev->pers) | |
2214c260 | 8375 | return; |
2a2275d6 | 8376 | if (mddev->ro) |
2214c260 | 8377 | return; |
1a0fd497 | 8378 | if (!mddev->pers->sync_request) |
2214c260 | 8379 | return; |
2a2275d6 | 8380 | |
85572d7c | 8381 | spin_lock(&mddev->lock); |
2a2275d6 N |
8382 | if (mddev->in_sync) { |
8383 | mddev->in_sync = 0; | |
2953079c SL |
8384 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8385 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8386 | if (mddev->safemode_delay && |
8387 | mddev->safemode == 0) | |
8388 | mddev->safemode = 1; | |
85572d7c | 8389 | spin_unlock(&mddev->lock); |
2a2275d6 | 8390 | md_update_sb(mddev, 0); |
00bcb4ac | 8391 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8392 | /* wait for the dirty state to be recorded in the metadata */ |
8393 | wait_event(mddev->sb_wait, | |
2214c260 | 8394 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8395 | } else |
85572d7c | 8396 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8397 | } |
8398 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8399 | ||
1da177e4 LT |
8400 | #define SYNC_MARKS 10 |
8401 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8402 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8403 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8404 | { |
4ed8731d | 8405 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8406 | struct mddev *mddev2; |
e5b521ee | 8407 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8408 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8409 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8410 | unsigned long update_time; |
1da177e4 LT |
8411 | sector_t mark_cnt[SYNC_MARKS]; |
8412 | int last_mark,m; | |
8413 | struct list_head *tmp; | |
8414 | sector_t last_check; | |
57afd89f | 8415 | int skipped = 0; |
3cb03002 | 8416 | struct md_rdev *rdev; |
c4a39551 | 8417 | char *desc, *action = NULL; |
7c2c57c9 | 8418 | struct blk_plug plug; |
41a9a0dc | 8419 | int ret; |
1da177e4 LT |
8420 | |
8421 | /* just incase thread restarts... */ | |
d5d885fd SL |
8422 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8423 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8424 | return; |
3991b31e N |
8425 | if (mddev->ro) {/* never try to sync a read-only array */ |
8426 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8427 | return; |
3991b31e | 8428 | } |
1da177e4 | 8429 | |
41a9a0dc GJ |
8430 | if (mddev_is_clustered(mddev)) { |
8431 | ret = md_cluster_ops->resync_start(mddev); | |
8432 | if (ret) | |
8433 | goto skip; | |
8434 | ||
bb8bf15b | 8435 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8436 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8437 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8438 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8439 | && ((unsigned long long)mddev->curr_resync_completed | |
8440 | < (unsigned long long)mddev->resync_max_sectors)) | |
8441 | goto skip; | |
8442 | } | |
8443 | ||
61df9d91 | 8444 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8445 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8446 | desc = "data-check"; |
c4a39551 JB |
8447 | action = "check"; |
8448 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8449 | desc = "requested-resync"; |
c4a39551 JB |
8450 | action = "repair"; |
8451 | } else | |
61df9d91 N |
8452 | desc = "resync"; |
8453 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8454 | desc = "reshape"; | |
8455 | else | |
8456 | desc = "recovery"; | |
8457 | ||
c4a39551 JB |
8458 | mddev->last_sync_action = action ?: desc; |
8459 | ||
1da177e4 LT |
8460 | /* we overload curr_resync somewhat here. |
8461 | * 0 == not engaged in resync at all | |
8462 | * 2 == checking that there is no conflict with another sync | |
8463 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8464 | * commence |
1da177e4 LT |
8465 | * other == active in resync - this many blocks |
8466 | * | |
8467 | * Before starting a resync we must have set curr_resync to | |
8468 | * 2, and then checked that every "conflicting" array has curr_resync | |
8469 | * less than ours. When we find one that is the same or higher | |
8470 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8471 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8472 | * This will mean we have to start checking from the beginning again. | |
8473 | * | |
8474 | */ | |
8475 | ||
8476 | do { | |
c622ca54 | 8477 | int mddev2_minor = -1; |
1da177e4 LT |
8478 | mddev->curr_resync = 2; |
8479 | ||
8480 | try_again: | |
404e4b43 | 8481 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8482 | goto skip; |
29ac4aa3 | 8483 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8484 | if (mddev2 == mddev) |
8485 | continue; | |
90b08710 BS |
8486 | if (!mddev->parallel_resync |
8487 | && mddev2->curr_resync | |
8488 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8489 | DEFINE_WAIT(wq); |
8490 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8491 | /* arbitrarily yield */ | |
8492 | mddev->curr_resync = 1; | |
8493 | wake_up(&resync_wait); | |
8494 | } | |
8495 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8496 | /* no need to wait here, we can wait the next | |
8497 | * time 'round when curr_resync == 2 | |
8498 | */ | |
8499 | continue; | |
9744197c N |
8500 | /* We need to wait 'interruptible' so as not to |
8501 | * contribute to the load average, and not to | |
8502 | * be caught by 'softlockup' | |
8503 | */ | |
8504 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8505 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8506 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8507 | if (mddev2_minor != mddev2->md_minor) { |
8508 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8509 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8510 | desc, mdname(mddev), | |
8511 | mdname(mddev2)); | |
c622ca54 | 8512 | } |
1da177e4 | 8513 | mddev_put(mddev2); |
9744197c N |
8514 | if (signal_pending(current)) |
8515 | flush_signals(current); | |
1da177e4 LT |
8516 | schedule(); |
8517 | finish_wait(&resync_wait, &wq); | |
8518 | goto try_again; | |
8519 | } | |
8520 | finish_wait(&resync_wait, &wq); | |
8521 | } | |
8522 | } | |
8523 | } while (mddev->curr_resync < 2); | |
8524 | ||
5fd6c1dc | 8525 | j = 0; |
9d88883e | 8526 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8527 | /* resync follows the size requested by the personality, |
57afd89f | 8528 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8529 | */ |
8530 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8531 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8532 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8533 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8534 | j = mddev->resync_min; | |
8535 | else if (!mddev->bitmap) | |
5fd6c1dc | 8536 | j = mddev->recovery_cp; |
5e96ee65 | 8537 | |
cb9ee154 | 8538 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8539 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8540 | /* |
8541 | * If the original node aborts reshaping then we continue the | |
8542 | * reshaping, so set j again to avoid restart reshape from the | |
8543 | * first beginning | |
8544 | */ | |
8545 | if (mddev_is_clustered(mddev) && | |
8546 | mddev->reshape_position != MaxSector) | |
8547 | j = mddev->reshape_position; | |
8548 | } else { | |
1da177e4 | 8549 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8550 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8551 | j = MaxSector; |
4e59ca7d | 8552 | rcu_read_lock(); |
dafb20fa | 8553 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8554 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8555 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8556 | !test_bit(Faulty, &rdev->flags) && |
8557 | !test_bit(In_sync, &rdev->flags) && | |
8558 | rdev->recovery_offset < j) | |
8559 | j = rdev->recovery_offset; | |
4e59ca7d | 8560 | rcu_read_unlock(); |
133d4527 N |
8561 | |
8562 | /* If there is a bitmap, we need to make sure all | |
8563 | * writes that started before we added a spare | |
8564 | * complete before we start doing a recovery. | |
8565 | * Otherwise the write might complete and (via | |
8566 | * bitmap_endwrite) set a bit in the bitmap after the | |
8567 | * recovery has checked that bit and skipped that | |
8568 | * region. | |
8569 | */ | |
8570 | if (mddev->bitmap) { | |
8571 | mddev->pers->quiesce(mddev, 1); | |
8572 | mddev->pers->quiesce(mddev, 0); | |
8573 | } | |
5fd6c1dc | 8574 | } |
1da177e4 | 8575 | |
9d48739e N |
8576 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8577 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8578 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8579 | speed_max(mddev), desc); | |
1da177e4 | 8580 | |
eea1bf38 | 8581 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8582 | |
57afd89f | 8583 | io_sectors = 0; |
1da177e4 LT |
8584 | for (m = 0; m < SYNC_MARKS; m++) { |
8585 | mark[m] = jiffies; | |
57afd89f | 8586 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8587 | } |
8588 | last_mark = 0; | |
8589 | mddev->resync_mark = mark[last_mark]; | |
8590 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8591 | ||
8592 | /* | |
8593 | * Tune reconstruction: | |
8594 | */ | |
e5b521ee | 8595 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8596 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8597 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8598 | |
8599 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8600 | last_check = 0; |
8601 | ||
8602 | if (j>2) { | |
9d48739e N |
8603 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8604 | desc, mdname(mddev)); | |
1da177e4 | 8605 | mddev->curr_resync = j; |
72f36d59 N |
8606 | } else |
8607 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8608 | mddev->curr_resync_completed = j; |
72f36d59 N |
8609 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8610 | md_new_event(mddev); | |
54f89341 | 8611 | update_time = jiffies; |
1da177e4 | 8612 | |
7c2c57c9 | 8613 | blk_start_plug(&plug); |
1da177e4 | 8614 | while (j < max_sectors) { |
57afd89f | 8615 | sector_t sectors; |
1da177e4 | 8616 | |
57afd89f | 8617 | skipped = 0; |
97e4f42d | 8618 | |
7a91ee1f N |
8619 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8620 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8621 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8622 | > (max_sectors >> 4)) || | |
54f89341 | 8623 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8624 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8625 | >= mddev->resync_max - mddev->curr_resync_completed || |
8626 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8627 | )) { |
97e4f42d | 8628 | /* time to update curr_resync_completed */ |
97e4f42d N |
8629 | wait_event(mddev->recovery_wait, |
8630 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8631 | mddev->curr_resync_completed = j; |
35d78c66 | 8632 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8633 | j > mddev->recovery_cp) | |
8634 | mddev->recovery_cp = j; | |
54f89341 | 8635 | update_time = jiffies; |
2953079c | 8636 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8637 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8638 | } |
acb180b0 | 8639 | |
c91abf5a N |
8640 | while (j >= mddev->resync_max && |
8641 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8642 | /* As this condition is controlled by user-space, |
8643 | * we can block indefinitely, so use '_interruptible' | |
8644 | * to avoid triggering warnings. | |
8645 | */ | |
8646 | flush_signals(current); /* just in case */ | |
8647 | wait_event_interruptible(mddev->recovery_wait, | |
8648 | mddev->resync_max > j | |
c91abf5a N |
8649 | || test_bit(MD_RECOVERY_INTR, |
8650 | &mddev->recovery)); | |
e62e58a5 | 8651 | } |
acb180b0 | 8652 | |
c91abf5a N |
8653 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8654 | break; | |
acb180b0 | 8655 | |
09314799 | 8656 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8657 | if (sectors == 0) { |
dfc70645 | 8658 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8659 | break; |
1da177e4 | 8660 | } |
57afd89f N |
8661 | |
8662 | if (!skipped) { /* actual IO requested */ | |
8663 | io_sectors += sectors; | |
8664 | atomic_add(sectors, &mddev->recovery_active); | |
8665 | } | |
8666 | ||
e875ecea N |
8667 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8668 | break; | |
8669 | ||
1da177e4 | 8670 | j += sectors; |
5ed1df2e N |
8671 | if (j > max_sectors) |
8672 | /* when skipping, extra large numbers can be returned. */ | |
8673 | j = max_sectors; | |
72f36d59 N |
8674 | if (j > 2) |
8675 | mddev->curr_resync = j; | |
ff4e8d9a | 8676 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8677 | if (last_check == 0) |
e875ecea | 8678 | /* this is the earliest that rebuild will be |
d7603b7e N |
8679 | * visible in /proc/mdstat |
8680 | */ | |
8681 | md_new_event(mddev); | |
57afd89f N |
8682 | |
8683 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8684 | continue; |
8685 | ||
57afd89f | 8686 | last_check = io_sectors; |
1da177e4 LT |
8687 | repeat: |
8688 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8689 | /* step marks */ | |
8690 | int next = (last_mark+1) % SYNC_MARKS; | |
8691 | ||
8692 | mddev->resync_mark = mark[next]; | |
8693 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8694 | mark[next] = jiffies; | |
57afd89f | 8695 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8696 | last_mark = next; |
8697 | } | |
8698 | ||
c91abf5a N |
8699 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8700 | break; | |
1da177e4 LT |
8701 | |
8702 | /* | |
8703 | * this loop exits only if either when we are slower than | |
8704 | * the 'hard' speed limit, or the system was IO-idle for | |
8705 | * a jiffy. | |
8706 | * the system might be non-idle CPU-wise, but we only care | |
8707 | * about not overloading the IO subsystem. (things like an | |
8708 | * e2fsck being done on the RAID array should execute fast) | |
8709 | */ | |
1da177e4 LT |
8710 | cond_resched(); |
8711 | ||
ac7e50a3 XN |
8712 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8713 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8714 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8715 | |
88202a0c | 8716 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8717 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8718 | msleep(500); |
1da177e4 LT |
8719 | goto repeat; |
8720 | } | |
ac8fa419 N |
8721 | if (!is_mddev_idle(mddev, 0)) { |
8722 | /* | |
8723 | * Give other IO more of a chance. | |
8724 | * The faster the devices, the less we wait. | |
8725 | */ | |
8726 | wait_event(mddev->recovery_wait, | |
8727 | !atomic_read(&mddev->recovery_active)); | |
8728 | } | |
1da177e4 LT |
8729 | } |
8730 | } | |
9d48739e N |
8731 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8732 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8733 | ? "interrupted" : "done"); | |
1da177e4 LT |
8734 | /* |
8735 | * this also signals 'finished resyncing' to md_stop | |
8736 | */ | |
7c2c57c9 | 8737 | blk_finish_plug(&plug); |
1da177e4 LT |
8738 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8739 | ||
5ed1df2e N |
8740 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8741 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8742 | mddev->curr_resync > 3) { |
5ed1df2e N |
8743 | mddev->curr_resync_completed = mddev->curr_resync; |
8744 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8745 | } | |
09314799 | 8746 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8747 | |
dfc70645 | 8748 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8749 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8750 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8751 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8752 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8753 | pr_debug("md: checkpointing %s of %s.\n", |
8754 | desc, mdname(mddev)); | |
0a19caab | 8755 | if (test_bit(MD_RECOVERY_ERROR, |
8756 | &mddev->recovery)) | |
8757 | mddev->recovery_cp = | |
8758 | mddev->curr_resync_completed; | |
8759 | else | |
8760 | mddev->recovery_cp = | |
8761 | mddev->curr_resync; | |
5fd6c1dc N |
8762 | } |
8763 | } else | |
8764 | mddev->recovery_cp = MaxSector; | |
8765 | } else { | |
8766 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8767 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8768 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8769 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8770 | rcu_read_lock(); | |
8771 | rdev_for_each_rcu(rdev, mddev) | |
8772 | if (rdev->raid_disk >= 0 && | |
8773 | mddev->delta_disks >= 0 && | |
8774 | !test_bit(Journal, &rdev->flags) && | |
8775 | !test_bit(Faulty, &rdev->flags) && | |
8776 | !test_bit(In_sync, &rdev->flags) && | |
8777 | rdev->recovery_offset < mddev->curr_resync) | |
8778 | rdev->recovery_offset = mddev->curr_resync; | |
8779 | rcu_read_unlock(); | |
8780 | } | |
5fd6c1dc | 8781 | } |
1da177e4 | 8782 | } |
db91ff55 | 8783 | skip: |
bb8bf15b GJ |
8784 | /* set CHANGE_PENDING here since maybe another update is needed, |
8785 | * so other nodes are informed. It should be harmless for normal | |
8786 | * raid */ | |
2953079c SL |
8787 | set_mask_bits(&mddev->sb_flags, 0, |
8788 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8789 | |
8876391e BC |
8790 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8791 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8792 | mddev->delta_disks > 0 && | |
8793 | mddev->pers->finish_reshape && | |
8794 | mddev->pers->size && | |
8795 | mddev->queue) { | |
8796 | mddev_lock_nointr(mddev); | |
8797 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
8798 | mddev_unlock(mddev); | |
aefb2e5f GJ |
8799 | if (!mddev_is_clustered(mddev)) { |
8800 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
8801 | revalidate_disk(mddev->gendisk); | |
8802 | } | |
8876391e BC |
8803 | } |
8804 | ||
23da422b | 8805 | spin_lock(&mddev->lock); |
c07b70ad N |
8806 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8807 | /* We completed so min/max setting can be forgotten if used. */ | |
8808 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8809 | mddev->resync_min = 0; | |
8810 | mddev->resync_max = MaxSector; | |
8811 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8812 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8813 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8814 | mddev->curr_resync = 0; |
23da422b N |
8815 | spin_unlock(&mddev->lock); |
8816 | ||
1da177e4 | 8817 | wake_up(&resync_wait); |
1da177e4 | 8818 | md_wakeup_thread(mddev->thread); |
c6207277 | 8819 | return; |
1da177e4 | 8820 | } |
29269553 | 8821 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8822 | |
746d3207 N |
8823 | static int remove_and_add_spares(struct mddev *mddev, |
8824 | struct md_rdev *this) | |
b4c4c7b8 | 8825 | { |
3cb03002 | 8826 | struct md_rdev *rdev; |
b4c4c7b8 | 8827 | int spares = 0; |
f2a371c5 | 8828 | int removed = 0; |
d787be40 | 8829 | bool remove_some = false; |
b4c4c7b8 | 8830 | |
39772f0a N |
8831 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
8832 | /* Mustn't remove devices when resync thread is running */ | |
8833 | return 0; | |
8834 | ||
d787be40 N |
8835 | rdev_for_each(rdev, mddev) { |
8836 | if ((this == NULL || rdev == this) && | |
8837 | rdev->raid_disk >= 0 && | |
8838 | !test_bit(Blocked, &rdev->flags) && | |
8839 | test_bit(Faulty, &rdev->flags) && | |
8840 | atomic_read(&rdev->nr_pending)==0) { | |
8841 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8842 | * never get nr_pending incremented, | |
8843 | * never get Faulty cleared, and never get Blocked set. | |
8844 | * So we can synchronize_rcu now rather than once per device | |
8845 | */ | |
8846 | remove_some = true; | |
8847 | set_bit(RemoveSynchronized, &rdev->flags); | |
8848 | } | |
8849 | } | |
8850 | ||
8851 | if (remove_some) | |
8852 | synchronize_rcu(); | |
8853 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8854 | if ((this == NULL || rdev == this) && |
8855 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8856 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8857 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8858 | (!test_bit(In_sync, &rdev->flags) && |
8859 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8860 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8861 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8862 | mddev, rdev) == 0) { |
36fad858 | 8863 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 8864 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 8865 | rdev->raid_disk = -1; |
f2a371c5 | 8866 | removed++; |
b4c4c7b8 N |
8867 | } |
8868 | } | |
d787be40 N |
8869 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8870 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8871 | } | |
8872 | ||
90584fc9 JB |
8873 | if (removed && mddev->kobj.sd) |
8874 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8875 | |
2910ff17 | 8876 | if (this && removed) |
746d3207 N |
8877 | goto no_add; |
8878 | ||
dafb20fa | 8879 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8880 | if (this && this != rdev) |
8881 | continue; | |
dbb64f86 GR |
8882 | if (test_bit(Candidate, &rdev->flags)) |
8883 | continue; | |
7bfec5f3 N |
8884 | if (rdev->raid_disk >= 0 && |
8885 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8886 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8887 | !test_bit(Faulty, &rdev->flags)) |
8888 | spares++; | |
7ceb17e8 N |
8889 | if (rdev->raid_disk >= 0) |
8890 | continue; | |
8891 | if (test_bit(Faulty, &rdev->flags)) | |
8892 | continue; | |
f6b6ec5c SL |
8893 | if (!test_bit(Journal, &rdev->flags)) { |
8894 | if (mddev->ro && | |
8895 | ! (rdev->saved_raid_disk >= 0 && | |
8896 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8897 | continue; | |
7ceb17e8 | 8898 | |
f6b6ec5c SL |
8899 | rdev->recovery_offset = 0; |
8900 | } | |
7ceb17e8 N |
8901 | if (mddev->pers-> |
8902 | hot_add_disk(mddev, rdev) == 0) { | |
8903 | if (sysfs_link_rdev(mddev, rdev)) | |
8904 | /* failure here is OK */; | |
f6b6ec5c SL |
8905 | if (!test_bit(Journal, &rdev->flags)) |
8906 | spares++; | |
7ceb17e8 | 8907 | md_new_event(mddev); |
2953079c | 8908 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8909 | } |
b4c4c7b8 | 8910 | } |
746d3207 | 8911 | no_add: |
6dafab6b | 8912 | if (removed) |
2953079c | 8913 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8914 | return spares; |
8915 | } | |
7ebc0be7 | 8916 | |
ac05f256 N |
8917 | static void md_start_sync(struct work_struct *ws) |
8918 | { | |
8919 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8920 | |
ac05f256 N |
8921 | mddev->sync_thread = md_register_thread(md_do_sync, |
8922 | mddev, | |
8923 | "resync"); | |
8924 | if (!mddev->sync_thread) { | |
9d48739e N |
8925 | pr_warn("%s: could not start resync thread...\n", |
8926 | mdname(mddev)); | |
ac05f256 N |
8927 | /* leave the spares where they are, it shouldn't hurt */ |
8928 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8929 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8930 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8931 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8932 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8933 | wake_up(&resync_wait); |
ac05f256 N |
8934 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8935 | &mddev->recovery)) | |
8936 | if (mddev->sysfs_action) | |
8937 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8938 | } else | |
8939 | md_wakeup_thread(mddev->sync_thread); | |
8940 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8941 | md_new_event(mddev); | |
8942 | } | |
8943 | ||
1da177e4 LT |
8944 | /* |
8945 | * This routine is regularly called by all per-raid-array threads to | |
8946 | * deal with generic issues like resync and super-block update. | |
8947 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8948 | * need this as they never do any recovery or update the superblock. | |
8949 | * | |
8950 | * It does not do any resync itself, but rather "forks" off other threads | |
8951 | * to do that as needed. | |
8952 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8953 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8954 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8955 | * and wakeups up this thread which will reap the thread and finish up. |
8956 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8957 | * | |
8958 | * The overall approach is: | |
8959 | * 1/ if the superblock needs updating, update it. | |
8960 | * 2/ If a recovery thread is running, don't do anything else. | |
8961 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8962 | * 4/ If there are any faulty devices, remove them. | |
8963 | * 5/ If array is degraded, try to add spares devices | |
8964 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8965 | */ | |
fd01b88c | 8966 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8967 | { |
059421e0 N |
8968 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
8969 | /* Write superblock - thread that called mddev_suspend() | |
8970 | * holds reconfig_mutex for us. | |
8971 | */ | |
8972 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
8973 | smp_mb__after_atomic(); | |
8974 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
8975 | md_update_sb(mddev, 0); | |
8976 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
8977 | wake_up(&mddev->sb_wait); | |
8978 | } | |
8979 | ||
68866e42 JB |
8980 | if (mddev->suspended) |
8981 | return; | |
8982 | ||
5f40402d | 8983 | if (mddev->bitmap) |
e64e4018 | 8984 | md_bitmap_daemon_work(mddev); |
1da177e4 | 8985 | |
fca4d848 | 8986 | if (signal_pending(current)) { |
31a59e34 | 8987 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8988 | pr_debug("md: %s in immediate safe mode\n", |
8989 | mdname(mddev)); | |
fca4d848 N |
8990 | mddev->safemode = 2; |
8991 | } | |
8992 | flush_signals(current); | |
8993 | } | |
8994 | ||
c89a8eee N |
8995 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8996 | return; | |
1da177e4 | 8997 | if ( ! ( |
2953079c | 8998 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8999 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 9000 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 9001 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 9002 | (mddev->safemode == 2 |
fca4d848 | 9003 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
9004 | )) |
9005 | return; | |
fca4d848 | 9006 | |
df5b89b3 | 9007 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 9008 | int spares = 0; |
480523fe | 9009 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 9010 | |
afc1f55c | 9011 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
9012 | mddev->safemode = 0; |
9013 | ||
c89a8eee | 9014 | if (mddev->ro) { |
ab16bfc7 NB |
9015 | struct md_rdev *rdev; |
9016 | if (!mddev->external && mddev->in_sync) | |
9017 | /* 'Blocked' flag not needed as failed devices | |
9018 | * will be recorded if array switched to read/write. | |
9019 | * Leaving it set will prevent the device | |
9020 | * from being removed. | |
9021 | */ | |
9022 | rdev_for_each(rdev, mddev) | |
9023 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
9024 | /* On a read-only array we can: |
9025 | * - remove failed devices | |
9026 | * - add already-in_sync devices if the array itself | |
9027 | * is in-sync. | |
9028 | * As we only add devices that are already in-sync, | |
9029 | * we can activate the spares immediately. | |
c89a8eee | 9030 | */ |
7ceb17e8 | 9031 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
9032 | /* There is no thread, but we need to call |
9033 | * ->spare_active and clear saved_raid_disk | |
9034 | */ | |
2ac295a5 | 9035 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 9036 | md_reap_sync_thread(mddev); |
a4a3d26d | 9037 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9038 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9039 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9040 | goto unlock; |
9041 | } | |
9042 | ||
659b254f GJ |
9043 | if (mddev_is_clustered(mddev)) { |
9044 | struct md_rdev *rdev; | |
9045 | /* kick the device if another node issued a | |
9046 | * remove disk. | |
9047 | */ | |
9048 | rdev_for_each(rdev, mddev) { | |
9049 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
9050 | rdev->raid_disk < 0) | |
9051 | md_kick_rdev_from_array(rdev); | |
9052 | } | |
9053 | } | |
9054 | ||
480523fe | 9055 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9056 | spin_lock(&mddev->lock); |
6497709b | 9057 | set_in_sync(mddev); |
85572d7c | 9058 | spin_unlock(&mddev->lock); |
fca4d848 | 9059 | } |
fca4d848 | 9060 | |
2953079c | 9061 | if (mddev->sb_flags) |
850b2b42 | 9062 | md_update_sb(mddev, 0); |
06d91a5f | 9063 | |
1da177e4 LT |
9064 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9065 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9066 | /* resync/recovery still happening */ | |
9067 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9068 | goto unlock; | |
9069 | } | |
9070 | if (mddev->sync_thread) { | |
a91d5ac0 | 9071 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9072 | goto unlock; |
9073 | } | |
72a23c21 NB |
9074 | /* Set RUNNING before clearing NEEDED to avoid |
9075 | * any transients in the value of "sync_action". | |
9076 | */ | |
72f36d59 | 9077 | mddev->curr_resync_completed = 0; |
23da422b | 9078 | spin_lock(&mddev->lock); |
72a23c21 | 9079 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9080 | spin_unlock(&mddev->lock); |
24dd469d N |
9081 | /* Clear some bits that don't mean anything, but |
9082 | * might be left set | |
9083 | */ | |
24dd469d N |
9084 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9085 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9086 | |
ed209584 N |
9087 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9088 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9089 | goto not_running; |
1da177e4 LT |
9090 | /* no recovery is running. |
9091 | * remove any failed drives, then | |
9092 | * add spares if possible. | |
72f36d59 | 9093 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9094 | * the personality to fail the re-add. |
9095 | */ | |
1da177e4 | 9096 | |
b4c4c7b8 | 9097 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9098 | if (mddev->pers->check_reshape == NULL || |
9099 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9100 | /* Cannot proceed */ |
ac05f256 | 9101 | goto not_running; |
b4c4c7b8 | 9102 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9103 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9104 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9105 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9106 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9107 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9108 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9109 | } else if (mddev->recovery_cp < MaxSector) { |
9110 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9111 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9112 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9113 | /* nothing to be done ... */ | |
ac05f256 | 9114 | goto not_running; |
24dd469d | 9115 | |
1da177e4 | 9116 | if (mddev->pers->sync_request) { |
ef99bf48 | 9117 | if (spares) { |
a654b9d8 N |
9118 | /* We are adding a device or devices to an array |
9119 | * which has the bitmap stored on all devices. | |
9120 | * So make sure all bitmap pages get written | |
9121 | */ | |
e64e4018 | 9122 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9123 | } |
ac05f256 N |
9124 | INIT_WORK(&mddev->del_work, md_start_sync); |
9125 | queue_work(md_misc_wq, &mddev->del_work); | |
9126 | goto unlock; | |
1da177e4 | 9127 | } |
ac05f256 | 9128 | not_running: |
72a23c21 NB |
9129 | if (!mddev->sync_thread) { |
9130 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9131 | wake_up(&resync_wait); |
72a23c21 NB |
9132 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9133 | &mddev->recovery)) | |
0c3573f1 | 9134 | if (mddev->sysfs_action) |
00bcb4ac | 9135 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9136 | } |
ac05f256 N |
9137 | unlock: |
9138 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9139 | mddev_unlock(mddev); |
9140 | } | |
9141 | } | |
6c144d31 | 9142 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9143 | |
a91d5ac0 JB |
9144 | void md_reap_sync_thread(struct mddev *mddev) |
9145 | { | |
9146 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9147 | sector_t old_dev_sectors = mddev->dev_sectors; |
9148 | bool is_reshaped = false; | |
a91d5ac0 JB |
9149 | |
9150 | /* resync has finished, collect result */ | |
9151 | md_unregister_thread(&mddev->sync_thread); | |
9152 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9153 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9154 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9155 | /* success...*/ |
9156 | /* activate any spares */ | |
9157 | if (mddev->pers->spare_active(mddev)) { | |
9158 | sysfs_notify(&mddev->kobj, NULL, | |
9159 | "degraded"); | |
2953079c | 9160 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9161 | } |
9162 | } | |
9163 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9164 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9165 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9166 | if (mddev_is_clustered(mddev)) |
9167 | is_reshaped = true; | |
9168 | } | |
a91d5ac0 JB |
9169 | |
9170 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9171 | * information must be scrapped. |
a91d5ac0 | 9172 | */ |
f466722c N |
9173 | if (!mddev->degraded) |
9174 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9175 | rdev->saved_raid_disk = -1; |
9176 | ||
9177 | md_update_sb(mddev, 1); | |
2953079c | 9178 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9179 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9180 | * clustered raid */ | |
9181 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9182 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9183 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9184 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9185 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9186 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9187 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9188 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9189 | /* |
9190 | * We call md_cluster_ops->update_size here because sync_size could | |
9191 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9192 | * so it is time to update size across cluster. | |
9193 | */ | |
9194 | if (mddev_is_clustered(mddev) && is_reshaped | |
9195 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9196 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9197 | wake_up(&resync_wait); |
a91d5ac0 JB |
9198 | /* flag recovery needed just to double check */ |
9199 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9200 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9201 | md_new_event(mddev); | |
9202 | if (mddev->event_work.func) | |
9203 | queue_work(md_misc_wq, &mddev->event_work); | |
9204 | } | |
6c144d31 | 9205 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9206 | |
fd01b88c | 9207 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9208 | { |
00bcb4ac | 9209 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9210 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9211 | !test_bit(Blocked, &rdev->flags) && |
9212 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9213 | msecs_to_jiffies(5000)); |
9214 | rdev_dec_pending(rdev, mddev); | |
9215 | } | |
9216 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9217 | ||
c6563a8c N |
9218 | void md_finish_reshape(struct mddev *mddev) |
9219 | { | |
9220 | /* called be personality module when reshape completes. */ | |
9221 | struct md_rdev *rdev; | |
9222 | ||
9223 | rdev_for_each(rdev, mddev) { | |
9224 | if (rdev->data_offset > rdev->new_data_offset) | |
9225 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9226 | else | |
9227 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9228 | rdev->data_offset = rdev->new_data_offset; | |
9229 | } | |
9230 | } | |
9231 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9232 | |
fc974ee2 | 9233 | /* Bad block management */ |
2230dfe4 | 9234 | |
fc974ee2 | 9235 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9236 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9237 | int is_new) |
2230dfe4 | 9238 | { |
85ad1d13 | 9239 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9240 | int rv; |
9241 | if (is_new) | |
9242 | s += rdev->new_data_offset; | |
9243 | else | |
9244 | s += rdev->data_offset; | |
fc974ee2 VV |
9245 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9246 | if (rv == 0) { | |
2230dfe4 | 9247 | /* Make sure they get written out promptly */ |
35b785f7 TM |
9248 | if (test_bit(ExternalBbl, &rdev->flags)) |
9249 | sysfs_notify(&rdev->kobj, NULL, | |
9250 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 9251 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9252 | set_mask_bits(&mddev->sb_flags, 0, |
9253 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9254 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9255 | return 1; |
9256 | } else | |
9257 | return 0; | |
2230dfe4 N |
9258 | } |
9259 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9260 | ||
c6563a8c N |
9261 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9262 | int is_new) | |
2230dfe4 | 9263 | { |
35b785f7 | 9264 | int rv; |
c6563a8c N |
9265 | if (is_new) |
9266 | s += rdev->new_data_offset; | |
9267 | else | |
9268 | s += rdev->data_offset; | |
35b785f7 TM |
9269 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9270 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
9271 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
9272 | return rv; | |
2230dfe4 N |
9273 | } |
9274 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9275 | ||
75c96f85 AB |
9276 | static int md_notify_reboot(struct notifier_block *this, |
9277 | unsigned long code, void *x) | |
1da177e4 LT |
9278 | { |
9279 | struct list_head *tmp; | |
fd01b88c | 9280 | struct mddev *mddev; |
2dba6a91 | 9281 | int need_delay = 0; |
1da177e4 | 9282 | |
c744a65c N |
9283 | for_each_mddev(mddev, tmp) { |
9284 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9285 | if (mddev->pers) |
9286 | __md_stop_writes(mddev); | |
0f62fb22 N |
9287 | if (mddev->persistent) |
9288 | mddev->safemode = 2; | |
c744a65c | 9289 | mddev_unlock(mddev); |
2dba6a91 | 9290 | } |
c744a65c | 9291 | need_delay = 1; |
1da177e4 | 9292 | } |
c744a65c N |
9293 | /* |
9294 | * certain more exotic SCSI devices are known to be | |
9295 | * volatile wrt too early system reboots. While the | |
9296 | * right place to handle this issue is the given | |
9297 | * driver, we do want to have a safe RAID driver ... | |
9298 | */ | |
9299 | if (need_delay) | |
9300 | mdelay(1000*1); | |
9301 | ||
1da177e4 LT |
9302 | return NOTIFY_DONE; |
9303 | } | |
9304 | ||
75c96f85 | 9305 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9306 | .notifier_call = md_notify_reboot, |
9307 | .next = NULL, | |
9308 | .priority = INT_MAX, /* before any real devices */ | |
9309 | }; | |
9310 | ||
9311 | static void md_geninit(void) | |
9312 | { | |
36a4e1fe | 9313 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9314 | |
c7705f34 | 9315 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
9316 | } |
9317 | ||
75c96f85 | 9318 | static int __init md_init(void) |
1da177e4 | 9319 | { |
e804ac78 TH |
9320 | int ret = -ENOMEM; |
9321 | ||
ada609ee | 9322 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9323 | if (!md_wq) |
9324 | goto err_wq; | |
9325 | ||
9326 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9327 | if (!md_misc_wq) | |
9328 | goto err_misc_wq; | |
9329 | ||
9330 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
9331 | goto err_md; | |
9332 | ||
9333 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9334 | goto err_mdp; | |
9335 | mdp_major = ret; | |
9336 | ||
af5628f0 | 9337 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9338 | md_probe, NULL, NULL); |
9339 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9340 | md_probe, NULL, NULL); |
9341 | ||
1da177e4 | 9342 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9343 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9344 | |
9345 | md_geninit(); | |
d710e138 | 9346 | return 0; |
1da177e4 | 9347 | |
e804ac78 TH |
9348 | err_mdp: |
9349 | unregister_blkdev(MD_MAJOR, "md"); | |
9350 | err_md: | |
9351 | destroy_workqueue(md_misc_wq); | |
9352 | err_misc_wq: | |
9353 | destroy_workqueue(md_wq); | |
9354 | err_wq: | |
9355 | return ret; | |
9356 | } | |
1da177e4 | 9357 | |
70bcecdb | 9358 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9359 | { |
70bcecdb GR |
9360 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9361 | struct md_rdev *rdev2; | |
9362 | int role, ret; | |
9363 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9364 | |
818da59f GJ |
9365 | /* |
9366 | * If size is changed in another node then we need to | |
9367 | * do resize as well. | |
9368 | */ | |
9369 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9370 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9371 | if (ret) | |
9372 | pr_info("md-cluster: resize failed\n"); | |
9373 | else | |
e64e4018 | 9374 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9375 | } |
9376 | ||
70bcecdb GR |
9377 | /* Check for change of roles in the active devices */ |
9378 | rdev_for_each(rdev2, mddev) { | |
9379 | if (test_bit(Faulty, &rdev2->flags)) | |
9380 | continue; | |
9381 | ||
9382 | /* Check if the roles changed */ | |
9383 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9384 | |
9385 | if (test_bit(Candidate, &rdev2->flags)) { | |
9386 | if (role == 0xfffe) { | |
9387 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9388 | md_kick_rdev_from_array(rdev2); | |
9389 | continue; | |
9390 | } | |
9391 | else | |
9392 | clear_bit(Candidate, &rdev2->flags); | |
9393 | } | |
9394 | ||
70bcecdb | 9395 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9396 | /* |
9397 | * got activated except reshape is happening. | |
9398 | */ | |
9399 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9400 | !(le32_to_cpu(sb->feature_map) & | |
9401 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9402 | rdev2->saved_raid_disk = role; |
9403 | ret = remove_and_add_spares(mddev, rdev2); | |
9404 | pr_info("Activated spare: %s\n", | |
9d48739e | 9405 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9406 | /* wakeup mddev->thread here, so array could |
9407 | * perform resync with the new activated disk */ | |
9408 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9409 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9410 | } |
9411 | /* device faulty | |
9412 | * We just want to do the minimum to mark the disk | |
9413 | * as faulty. The recovery is performed by the | |
9414 | * one who initiated the error. | |
9415 | */ | |
9416 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9417 | md_error(mddev, rdev2); | |
9418 | clear_bit(Blocked, &rdev2->flags); | |
9419 | } | |
9420 | } | |
1d7e3e96 | 9421 | } |
70bcecdb | 9422 | |
28c1b9fd GR |
9423 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9424 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9425 | |
7564beda GJ |
9426 | /* |
9427 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9428 | * so it is time to check reshape. | |
9429 | */ | |
9430 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9431 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9432 | /* | |
9433 | * reshape is happening in the remote node, we need to | |
9434 | * update reshape_position and call start_reshape. | |
9435 | */ | |
ed4d0a4e | 9436 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9437 | if (mddev->pers->update_reshape_pos) |
9438 | mddev->pers->update_reshape_pos(mddev); | |
9439 | if (mddev->pers->start_reshape) | |
9440 | mddev->pers->start_reshape(mddev); | |
9441 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9442 | mddev->reshape_position != MaxSector && | |
9443 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9444 | /* reshape is just done in another node. */ | |
9445 | mddev->reshape_position = MaxSector; | |
9446 | if (mddev->pers->update_reshape_pos) | |
9447 | mddev->pers->update_reshape_pos(mddev); | |
9448 | } | |
9449 | ||
70bcecdb GR |
9450 | /* Finally set the event to be up to date */ |
9451 | mddev->events = le64_to_cpu(sb->events); | |
9452 | } | |
9453 | ||
9454 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9455 | { | |
9456 | int err; | |
9457 | struct page *swapout = rdev->sb_page; | |
9458 | struct mdp_superblock_1 *sb; | |
9459 | ||
9460 | /* Store the sb page of the rdev in the swapout temporary | |
9461 | * variable in case we err in the future | |
9462 | */ | |
9463 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9464 | err = alloc_disk_sb(rdev); |
9465 | if (err == 0) { | |
9466 | ClearPageUptodate(rdev->sb_page); | |
9467 | rdev->sb_loaded = 0; | |
9468 | err = super_types[mddev->major_version]. | |
9469 | load_super(rdev, NULL, mddev->minor_version); | |
9470 | } | |
70bcecdb GR |
9471 | if (err < 0) { |
9472 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9473 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9474 | if (rdev->sb_page) |
9475 | put_page(rdev->sb_page); | |
70bcecdb GR |
9476 | rdev->sb_page = swapout; |
9477 | rdev->sb_loaded = 1; | |
9478 | return err; | |
1d7e3e96 GR |
9479 | } |
9480 | ||
70bcecdb GR |
9481 | sb = page_address(rdev->sb_page); |
9482 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9483 | * is not set | |
9484 | */ | |
9485 | ||
9486 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9487 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9488 | ||
9489 | /* The other node finished recovery, call spare_active to set | |
9490 | * device In_sync and mddev->degraded | |
9491 | */ | |
9492 | if (rdev->recovery_offset == MaxSector && | |
9493 | !test_bit(In_sync, &rdev->flags) && | |
9494 | mddev->pers->spare_active(mddev)) | |
9495 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9496 | ||
9497 | put_page(swapout); | |
9498 | return 0; | |
9499 | } | |
9500 | ||
9501 | void md_reload_sb(struct mddev *mddev, int nr) | |
9502 | { | |
9503 | struct md_rdev *rdev; | |
9504 | int err; | |
9505 | ||
9506 | /* Find the rdev */ | |
9507 | rdev_for_each_rcu(rdev, mddev) { | |
9508 | if (rdev->desc_nr == nr) | |
9509 | break; | |
9510 | } | |
9511 | ||
9512 | if (!rdev || rdev->desc_nr != nr) { | |
9513 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9514 | return; | |
9515 | } | |
9516 | ||
9517 | err = read_rdev(mddev, rdev); | |
9518 | if (err < 0) | |
9519 | return; | |
9520 | ||
9521 | check_sb_changes(mddev, rdev); | |
9522 | ||
9523 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9524 | rdev_for_each_rcu(rdev, mddev) { |
9525 | if (!test_bit(Faulty, &rdev->flags)) | |
9526 | read_rdev(mddev, rdev); | |
9527 | } | |
1d7e3e96 GR |
9528 | } |
9529 | EXPORT_SYMBOL(md_reload_sb); | |
9530 | ||
1da177e4 LT |
9531 | #ifndef MODULE |
9532 | ||
9533 | /* | |
9534 | * Searches all registered partitions for autorun RAID arrays | |
9535 | * at boot time. | |
9536 | */ | |
4d936ec1 | 9537 | |
5b1f5bc3 | 9538 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9539 | static LIST_HEAD(all_detected_devices); |
9540 | struct detected_devices_node { | |
9541 | struct list_head list; | |
9542 | dev_t dev; | |
9543 | }; | |
1da177e4 LT |
9544 | |
9545 | void md_autodetect_dev(dev_t dev) | |
9546 | { | |
4d936ec1 ME |
9547 | struct detected_devices_node *node_detected_dev; |
9548 | ||
9549 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9550 | if (node_detected_dev) { | |
9551 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9552 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9553 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9554 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9555 | } |
1da177e4 LT |
9556 | } |
9557 | ||
1da177e4 LT |
9558 | static void autostart_arrays(int part) |
9559 | { | |
3cb03002 | 9560 | struct md_rdev *rdev; |
4d936ec1 ME |
9561 | struct detected_devices_node *node_detected_dev; |
9562 | dev_t dev; | |
9563 | int i_scanned, i_passed; | |
1da177e4 | 9564 | |
4d936ec1 ME |
9565 | i_scanned = 0; |
9566 | i_passed = 0; | |
1da177e4 | 9567 | |
9d48739e | 9568 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9569 | |
5b1f5bc3 | 9570 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9571 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9572 | i_scanned++; | |
9573 | node_detected_dev = list_entry(all_detected_devices.next, | |
9574 | struct detected_devices_node, list); | |
9575 | list_del(&node_detected_dev->list); | |
9576 | dev = node_detected_dev->dev; | |
9577 | kfree(node_detected_dev); | |
90bcf133 | 9578 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9579 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9580 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9581 | if (IS_ERR(rdev)) |
9582 | continue; | |
9583 | ||
403df478 | 9584 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9585 | continue; |
403df478 | 9586 | |
d0fae18f | 9587 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9588 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9589 | i_passed++; |
1da177e4 | 9590 | } |
5b1f5bc3 | 9591 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9592 | |
9d48739e | 9593 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9594 | |
9595 | autorun_devices(part); | |
9596 | } | |
9597 | ||
fdee8ae4 | 9598 | #endif /* !MODULE */ |
1da177e4 LT |
9599 | |
9600 | static __exit void md_exit(void) | |
9601 | { | |
fd01b88c | 9602 | struct mddev *mddev; |
1da177e4 | 9603 | struct list_head *tmp; |
e2f23b60 | 9604 | int delay = 1; |
8ab5e4c1 | 9605 | |
af5628f0 | 9606 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9607 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9608 | |
3dbd8c2e | 9609 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9610 | unregister_blkdev(mdp_major, "mdp"); |
9611 | unregister_reboot_notifier(&md_notifier); | |
9612 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9613 | |
9614 | /* We cannot unload the modules while some process is | |
9615 | * waiting for us in select() or poll() - wake them up | |
9616 | */ | |
9617 | md_unloading = 1; | |
9618 | while (waitqueue_active(&md_event_waiters)) { | |
9619 | /* not safe to leave yet */ | |
9620 | wake_up(&md_event_waiters); | |
9621 | msleep(delay); | |
9622 | delay += delay; | |
9623 | } | |
1da177e4 | 9624 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9625 | |
29ac4aa3 | 9626 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9627 | export_array(mddev); |
9356863c | 9628 | mddev->ctime = 0; |
d3374825 | 9629 | mddev->hold_active = 0; |
9356863c N |
9630 | /* |
9631 | * for_each_mddev() will call mddev_put() at the end of each | |
9632 | * iteration. As the mddev is now fully clear, this will | |
9633 | * schedule the mddev for destruction by a workqueue, and the | |
9634 | * destroy_workqueue() below will wait for that to complete. | |
9635 | */ | |
1da177e4 | 9636 | } |
e804ac78 TH |
9637 | destroy_workqueue(md_misc_wq); |
9638 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9639 | } |
9640 | ||
685784aa | 9641 | subsys_initcall(md_init); |
1da177e4 LT |
9642 | module_exit(md_exit) |
9643 | ||
e4dca7b7 | 9644 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e N |
9645 | { |
9646 | return sprintf(buffer, "%d", start_readonly); | |
9647 | } | |
e4dca7b7 | 9648 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9649 | { |
4c9309c0 | 9650 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9651 | } |
9652 | ||
80ca3a44 N |
9653 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9654 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9655 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9656 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9657 | |
1da177e4 | 9658 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9659 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9660 | MODULE_ALIAS("md"); |
72008652 | 9661 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |