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1da177e4 LT |
1 | /* |
2 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 3 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
4 | |
5 | completely rewritten, based on the MD driver code from Marc Zyngier | |
6 | ||
7 | Changes: | |
8 | ||
9 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
10 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
11 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
12 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
13 | - kmod support by: Cyrus Durgin | |
14 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
15 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
16 | ||
17 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
18 | RAID code (such as request based resynchronization): | |
19 | ||
20 | Neil Brown <neilb@cse.unsw.edu.au>. | |
21 | ||
32a7627c N |
22 | - persistent bitmap code |
23 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
24 | ||
1da177e4 LT |
25 | This program is free software; you can redistribute it and/or modify |
26 | it under the terms of the GNU General Public License as published by | |
27 | the Free Software Foundation; either version 2, or (at your option) | |
28 | any later version. | |
29 | ||
30 | You should have received a copy of the GNU General Public License | |
31 | (for example /usr/src/linux/COPYING); if not, write to the Free | |
32 | Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
9d48739e N |
33 | |
34 | Errors, Warnings, etc. | |
35 | Please use: | |
36 | pr_crit() for error conditions that risk data loss | |
37 | pr_err() for error conditions that are unexpected, like an IO error | |
38 | or internal inconsistency | |
39 | pr_warn() for error conditions that could have been predicated, like | |
40 | adding a device to an array when it has incompatible metadata | |
41 | pr_info() for every interesting, very rare events, like an array starting | |
42 | or stopping, or resync starting or stopping | |
43 | pr_debug() for everything else. | |
44 | ||
1da177e4 LT |
45 | */ |
46 | ||
3f07c014 | 47 | #include <linux/sched/signal.h> |
a6fb0934 | 48 | #include <linux/kthread.h> |
bff61975 | 49 | #include <linux/blkdev.h> |
fc974ee2 | 50 | #include <linux/badblocks.h> |
1da177e4 | 51 | #include <linux/sysctl.h> |
bff61975 | 52 | #include <linux/seq_file.h> |
ff01bb48 | 53 | #include <linux/fs.h> |
d7603b7e | 54 | #include <linux/poll.h> |
16f17b39 | 55 | #include <linux/ctype.h> |
e7d2860b | 56 | #include <linux/string.h> |
fb4d8c76 N |
57 | #include <linux/hdreg.h> |
58 | #include <linux/proc_fs.h> | |
59 | #include <linux/random.h> | |
056075c7 | 60 | #include <linux/module.h> |
fb4d8c76 | 61 | #include <linux/reboot.h> |
32a7627c | 62 | #include <linux/file.h> |
aa98aa31 | 63 | #include <linux/compat.h> |
25570727 | 64 | #include <linux/delay.h> |
bff61975 N |
65 | #include <linux/raid/md_p.h> |
66 | #include <linux/raid/md_u.h> | |
5a0e3ad6 | 67 | #include <linux/slab.h> |
4ad23a97 N |
68 | #include <linux/percpu-refcount.h> |
69 | ||
504634f6 | 70 | #include <trace/events/block.h> |
43b2e5d8 | 71 | #include "md.h" |
935fe098 | 72 | #include "md-bitmap.h" |
edb39c9d | 73 | #include "md-cluster.h" |
1da177e4 | 74 | |
1da177e4 | 75 | #ifndef MODULE |
d710e138 | 76 | static void autostart_arrays(int part); |
1da177e4 LT |
77 | #endif |
78 | ||
01f96c0a N |
79 | /* pers_list is a list of registered personalities protected |
80 | * by pers_lock. | |
81 | * pers_lock does extra service to protect accesses to | |
82 | * mddev->thread when the mutex cannot be held. | |
83 | */ | |
2604b703 | 84 | static LIST_HEAD(pers_list); |
1da177e4 LT |
85 | static DEFINE_SPINLOCK(pers_lock); |
86 | ||
28dec870 KO |
87 | static struct kobj_type md_ktype; |
88 | ||
edb39c9d | 89 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 90 | EXPORT_SYMBOL(md_cluster_ops); |
edb39c9d GR |
91 | struct module *md_cluster_mod; |
92 | EXPORT_SYMBOL(md_cluster_mod); | |
93 | ||
90b08710 | 94 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
95 | static struct workqueue_struct *md_wq; |
96 | static struct workqueue_struct *md_misc_wq; | |
90b08710 | 97 | |
746d3207 N |
98 | static int remove_and_add_spares(struct mddev *mddev, |
99 | struct md_rdev *this); | |
5aa61f42 | 100 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 101 | |
1e50915f RB |
102 | /* |
103 | * Default number of read corrections we'll attempt on an rdev | |
104 | * before ejecting it from the array. We divide the read error | |
105 | * count by 2 for every hour elapsed between read errors. | |
106 | */ | |
107 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
1da177e4 LT |
108 | /* |
109 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
110 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
111 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 112 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
113 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
114 | * speed limit - in case reconstruction slows down your system despite | |
115 | * idle IO detection. | |
116 | * | |
117 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 118 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
119 | */ |
120 | ||
121 | static int sysctl_speed_limit_min = 1000; | |
122 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 123 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
124 | { |
125 | return mddev->sync_speed_min ? | |
126 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
127 | } | |
128 | ||
fd01b88c | 129 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
130 | { |
131 | return mddev->sync_speed_max ? | |
132 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
133 | } | |
1da177e4 | 134 | |
5a409b4f XN |
135 | static void * flush_info_alloc(gfp_t gfp_flags, void *data) |
136 | { | |
137 | return kzalloc(sizeof(struct flush_info), gfp_flags); | |
138 | } | |
139 | static void flush_info_free(void *flush_info, void *data) | |
140 | { | |
141 | kfree(flush_info); | |
142 | } | |
143 | ||
144 | static void * flush_bio_alloc(gfp_t gfp_flags, void *data) | |
145 | { | |
146 | return kzalloc(sizeof(struct flush_bio), gfp_flags); | |
147 | } | |
148 | static void flush_bio_free(void *flush_bio, void *data) | |
149 | { | |
150 | kfree(flush_bio); | |
151 | } | |
152 | ||
1da177e4 LT |
153 | static struct ctl_table_header *raid_table_header; |
154 | ||
82592c38 | 155 | static struct ctl_table raid_table[] = { |
1da177e4 | 156 | { |
1da177e4 LT |
157 | .procname = "speed_limit_min", |
158 | .data = &sysctl_speed_limit_min, | |
159 | .maxlen = sizeof(int), | |
80ca3a44 | 160 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 161 | .proc_handler = proc_dointvec, |
1da177e4 LT |
162 | }, |
163 | { | |
1da177e4 LT |
164 | .procname = "speed_limit_max", |
165 | .data = &sysctl_speed_limit_max, | |
166 | .maxlen = sizeof(int), | |
80ca3a44 | 167 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 168 | .proc_handler = proc_dointvec, |
1da177e4 | 169 | }, |
894d2491 | 170 | { } |
1da177e4 LT |
171 | }; |
172 | ||
82592c38 | 173 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 174 | { |
1da177e4 LT |
175 | .procname = "raid", |
176 | .maxlen = 0, | |
80ca3a44 | 177 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
178 | .child = raid_table, |
179 | }, | |
894d2491 | 180 | { } |
1da177e4 LT |
181 | }; |
182 | ||
82592c38 | 183 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 184 | { |
1da177e4 LT |
185 | .procname = "dev", |
186 | .maxlen = 0, | |
187 | .mode = 0555, | |
188 | .child = raid_dir_table, | |
189 | }, | |
894d2491 | 190 | { } |
1da177e4 LT |
191 | }; |
192 | ||
83d5cde4 | 193 | static const struct block_device_operations md_fops; |
1da177e4 | 194 | |
f91de92e N |
195 | static int start_readonly; |
196 | ||
78b6350d N |
197 | /* |
198 | * The original mechanism for creating an md device is to create | |
199 | * a device node in /dev and to open it. This causes races with device-close. | |
200 | * The preferred method is to write to the "new_array" module parameter. | |
201 | * This can avoid races. | |
202 | * Setting create_on_open to false disables the original mechanism | |
203 | * so all the races disappear. | |
204 | */ | |
205 | static bool create_on_open = true; | |
206 | ||
a167f663 | 207 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 208 | struct mddev *mddev) |
a167f663 | 209 | { |
afeee514 | 210 | if (!mddev || !bioset_initialized(&mddev->bio_set)) |
a167f663 N |
211 | return bio_alloc(gfp_mask, nr_iovecs); |
212 | ||
6251691a | 213 | return bio_alloc_bioset(gfp_mask, nr_iovecs, &mddev->bio_set); |
a167f663 N |
214 | } |
215 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
216 | ||
5a85071c N |
217 | static struct bio *md_bio_alloc_sync(struct mddev *mddev) |
218 | { | |
afeee514 | 219 | if (!mddev || !bioset_initialized(&mddev->sync_set)) |
5a85071c N |
220 | return bio_alloc(GFP_NOIO, 1); |
221 | ||
afeee514 | 222 | return bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
5a85071c N |
223 | } |
224 | ||
d7603b7e N |
225 | /* |
226 | * We have a system wide 'event count' that is incremented | |
227 | * on any 'interesting' event, and readers of /proc/mdstat | |
228 | * can use 'poll' or 'select' to find out when the event | |
229 | * count increases. | |
230 | * | |
231 | * Events are: | |
232 | * start array, stop array, error, add device, remove device, | |
233 | * start build, activate spare | |
234 | */ | |
2989ddbd | 235 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 236 | static atomic_t md_event_count; |
fd01b88c | 237 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
238 | { |
239 | atomic_inc(&md_event_count); | |
240 | wake_up(&md_event_waiters); | |
241 | } | |
29269553 | 242 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 243 | |
1da177e4 LT |
244 | /* |
245 | * Enables to iterate over all existing md arrays | |
246 | * all_mddevs_lock protects this list. | |
247 | */ | |
248 | static LIST_HEAD(all_mddevs); | |
249 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
250 | ||
1da177e4 LT |
251 | /* |
252 | * iterates through all used mddevs in the system. | |
253 | * We take care to grab the all_mddevs_lock whenever navigating | |
254 | * the list, and to always hold a refcount when unlocked. | |
255 | * Any code which breaks out of this loop while own | |
256 | * a reference to the current mddev and must mddev_put it. | |
257 | */ | |
fd01b88c | 258 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 259 | \ |
f72ffdd6 | 260 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
261 | _tmp = all_mddevs.next; \ |
262 | _mddev = NULL;}); \ | |
263 | ({ if (_tmp != &all_mddevs) \ | |
264 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 265 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
266 | if (_mddev) mddev_put(_mddev); \ |
267 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
268 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 269 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 270 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
271 | ) |
272 | ||
409c57f3 N |
273 | /* Rather than calling directly into the personality make_request function, |
274 | * IO requests come here first so that we can check if the device is | |
275 | * being suspended pending a reconfiguration. | |
276 | * We hold a refcount over the call to ->make_request. By the time that | |
277 | * call has finished, the bio has been linked into some internal structure | |
278 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
279 | */ | |
b3143b9a N |
280 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
281 | { | |
282 | if (mddev->suspended) | |
283 | return true; | |
284 | if (bio_data_dir(bio) != WRITE) | |
285 | return false; | |
286 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
287 | return false; | |
288 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
289 | return false; | |
290 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
291 | return false; | |
292 | return true; | |
293 | } | |
294 | ||
393debc2 SL |
295 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
296 | { | |
297 | check_suspended: | |
298 | rcu_read_lock(); | |
b3143b9a | 299 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
300 | DEFINE_WAIT(__wait); |
301 | for (;;) { | |
302 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
303 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 304 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
305 | break; |
306 | rcu_read_unlock(); | |
307 | schedule(); | |
308 | rcu_read_lock(); | |
309 | } | |
310 | finish_wait(&mddev->sb_wait, &__wait); | |
311 | } | |
312 | atomic_inc(&mddev->active_io); | |
313 | rcu_read_unlock(); | |
314 | ||
315 | if (!mddev->pers->make_request(mddev, bio)) { | |
316 | atomic_dec(&mddev->active_io); | |
317 | wake_up(&mddev->sb_wait); | |
318 | goto check_suspended; | |
319 | } | |
320 | ||
321 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
322 | wake_up(&mddev->sb_wait); | |
323 | } | |
324 | EXPORT_SYMBOL(md_handle_request); | |
325 | ||
dece1635 | 326 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 327 | { |
49077326 | 328 | const int rw = bio_data_dir(bio); |
ddcf35d3 | 329 | const int sgrp = op_stat_group(bio_op(bio)); |
fd01b88c | 330 | struct mddev *mddev = q->queuedata; |
e91ece55 | 331 | unsigned int sectors; |
49077326 | 332 | |
af67c31f | 333 | blk_queue_split(q, &bio); |
54efd50b | 334 | |
274d8cbd | 335 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 336 | bio_io_error(bio); |
dece1635 | 337 | return BLK_QC_T_NONE; |
409c57f3 | 338 | } |
bbfa57c0 | 339 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 340 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 341 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 342 | bio_endio(bio); |
dece1635 | 343 | return BLK_QC_T_NONE; |
bbfa57c0 | 344 | } |
49077326 | 345 | |
e91ece55 CM |
346 | /* |
347 | * save the sectors now since our bio can | |
348 | * go away inside make_request | |
349 | */ | |
350 | sectors = bio_sectors(bio); | |
9c573de3 | 351 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 352 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
353 | |
354 | md_handle_request(mddev, bio); | |
49077326 | 355 | |
112f158f MS |
356 | part_stat_lock(); |
357 | part_stat_inc(&mddev->gendisk->part0, ios[sgrp]); | |
358 | part_stat_add(&mddev->gendisk->part0, sectors[sgrp], sectors); | |
74672d06 | 359 | part_stat_unlock(); |
49077326 | 360 | |
dece1635 | 361 | return BLK_QC_T_NONE; |
409c57f3 N |
362 | } |
363 | ||
9e35b99c N |
364 | /* mddev_suspend makes sure no new requests are submitted |
365 | * to the device, and that any requests that have been submitted | |
366 | * are completely handled. | |
afa0f557 N |
367 | * Once mddev_detach() is called and completes, the module will be |
368 | * completely unused. | |
9e35b99c | 369 | */ |
fd01b88c | 370 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 371 | { |
092398dc | 372 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 373 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
374 | if (mddev->suspended++) |
375 | return; | |
409c57f3 | 376 | synchronize_rcu(); |
cc27b0c7 | 377 | wake_up(&mddev->sb_wait); |
35bfc521 N |
378 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
379 | smp_mb__after_atomic(); | |
409c57f3 N |
380 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
381 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
382 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
383 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
384 | |
385 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 386 | } |
390ee602 | 387 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 388 | |
fd01b88c | 389 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 390 | { |
4d5324f7 | 391 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
392 | if (--mddev->suspended) |
393 | return; | |
409c57f3 N |
394 | wake_up(&mddev->sb_wait); |
395 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 396 | |
47525e59 | 397 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
398 | md_wakeup_thread(mddev->thread); |
399 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 400 | } |
390ee602 | 401 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 402 | |
fd01b88c | 403 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 404 | { |
5c675f83 N |
405 | struct md_personality *pers = mddev->pers; |
406 | int ret = 0; | |
407 | ||
408 | rcu_read_lock(); | |
409 | if (mddev->suspended) | |
410 | ret = 1; | |
411 | else if (pers && pers->congested) | |
412 | ret = pers->congested(mddev, bits); | |
413 | rcu_read_unlock(); | |
414 | return ret; | |
415 | } | |
416 | EXPORT_SYMBOL_GPL(mddev_congested); | |
417 | static int md_congested(void *data, int bits) | |
418 | { | |
419 | struct mddev *mddev = data; | |
420 | return mddev_congested(mddev, bits); | |
3fa841d7 | 421 | } |
3fa841d7 | 422 | |
a2826aa9 | 423 | /* |
e9c7469b | 424 | * Generic flush handling for md |
a2826aa9 | 425 | */ |
5a409b4f XN |
426 | static void submit_flushes(struct work_struct *ws) |
427 | { | |
428 | struct flush_info *fi = container_of(ws, struct flush_info, flush_work); | |
429 | struct mddev *mddev = fi->mddev; | |
430 | struct bio *bio = fi->bio; | |
431 | ||
432 | bio->bi_opf &= ~REQ_PREFLUSH; | |
433 | md_handle_request(mddev, bio); | |
434 | ||
435 | mempool_free(fi, mddev->flush_pool); | |
436 | } | |
a2826aa9 | 437 | |
5a409b4f | 438 | static void md_end_flush(struct bio *fbio) |
a2826aa9 | 439 | { |
5a409b4f XN |
440 | struct flush_bio *fb = fbio->bi_private; |
441 | struct md_rdev *rdev = fb->rdev; | |
442 | struct flush_info *fi = fb->fi; | |
443 | struct bio *bio = fi->bio; | |
444 | struct mddev *mddev = fi->mddev; | |
a2826aa9 N |
445 | |
446 | rdev_dec_pending(rdev, mddev); | |
447 | ||
5a409b4f | 448 | if (atomic_dec_and_test(&fi->flush_pending)) { |
af9b926d | 449 | if (bio->bi_iter.bi_size == 0) { |
5a409b4f XN |
450 | /* an empty barrier - all done */ |
451 | bio_endio(bio); | |
af9b926d XN |
452 | mempool_free(fi, mddev->flush_pool); |
453 | } else { | |
5a409b4f XN |
454 | INIT_WORK(&fi->flush_work, submit_flushes); |
455 | queue_work(md_wq, &fi->flush_work); | |
456 | } | |
a2826aa9 | 457 | } |
a2826aa9 | 458 | |
5a409b4f XN |
459 | mempool_free(fb, mddev->flush_bio_pool); |
460 | bio_put(fbio); | |
461 | } | |
a7a07e69 | 462 | |
5a409b4f | 463 | void md_flush_request(struct mddev *mddev, struct bio *bio) |
a2826aa9 | 464 | { |
3cb03002 | 465 | struct md_rdev *rdev; |
5a409b4f XN |
466 | struct flush_info *fi; |
467 | ||
468 | fi = mempool_alloc(mddev->flush_pool, GFP_NOIO); | |
469 | ||
470 | fi->bio = bio; | |
471 | fi->mddev = mddev; | |
472 | atomic_set(&fi->flush_pending, 1); | |
a2826aa9 N |
473 | |
474 | rcu_read_lock(); | |
dafb20fa | 475 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
476 | if (rdev->raid_disk >= 0 && |
477 | !test_bit(Faulty, &rdev->flags)) { | |
478 | /* Take two references, one is dropped | |
479 | * when request finishes, one after | |
480 | * we reclaim rcu_read_lock | |
481 | */ | |
482 | struct bio *bi; | |
5a409b4f | 483 | struct flush_bio *fb; |
a2826aa9 N |
484 | atomic_inc(&rdev->nr_pending); |
485 | atomic_inc(&rdev->nr_pending); | |
486 | rcu_read_unlock(); | |
5a409b4f XN |
487 | |
488 | fb = mempool_alloc(mddev->flush_bio_pool, GFP_NOIO); | |
489 | fb->fi = fi; | |
490 | fb->rdev = rdev; | |
491 | ||
b5e1b8ce | 492 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
74d46992 | 493 | bio_set_dev(bi, rdev->bdev); |
5a409b4f XN |
494 | bi->bi_end_io = md_end_flush; |
495 | bi->bi_private = fb; | |
70fd7614 | 496 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
5a409b4f XN |
497 | |
498 | atomic_inc(&fi->flush_pending); | |
4e49ea4a | 499 | submit_bio(bi); |
5a409b4f | 500 | |
a2826aa9 N |
501 | rcu_read_lock(); |
502 | rdev_dec_pending(rdev, mddev); | |
503 | } | |
504 | rcu_read_unlock(); | |
a2826aa9 | 505 | |
5a409b4f | 506 | if (atomic_dec_and_test(&fi->flush_pending)) { |
af9b926d | 507 | if (bio->bi_iter.bi_size == 0) { |
5a409b4f XN |
508 | /* an empty barrier - all done */ |
509 | bio_endio(bio); | |
af9b926d XN |
510 | mempool_free(fi, mddev->flush_pool); |
511 | } else { | |
5a409b4f XN |
512 | INIT_WORK(&fi->flush_work, submit_flushes); |
513 | queue_work(md_wq, &fi->flush_work); | |
514 | } | |
a2826aa9 | 515 | } |
a2826aa9 | 516 | } |
e9c7469b | 517 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 518 | |
fd01b88c | 519 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
520 | { |
521 | atomic_inc(&mddev->active); | |
522 | return mddev; | |
523 | } | |
524 | ||
5fd3a17e | 525 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 526 | |
fd01b88c | 527 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
528 | { |
529 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
530 | return; | |
d3374825 | 531 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
532 | mddev->ctime == 0 && !mddev->hold_active) { |
533 | /* Array is not configured at all, and not held active, | |
534 | * so destroy it */ | |
af8a2434 | 535 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
536 | |
537 | /* | |
538 | * Call queue_work inside the spinlock so that | |
539 | * flush_workqueue() after mddev_find will succeed in waiting | |
540 | * for the work to be done. | |
541 | */ | |
542 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
543 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
544 | } |
545 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
546 | } |
547 | ||
8376d3c1 | 548 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 549 | |
fd01b88c | 550 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 551 | { |
28dec870 | 552 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
553 | mutex_init(&mddev->open_mutex); |
554 | mutex_init(&mddev->reconfig_mutex); | |
555 | mutex_init(&mddev->bitmap_info.mutex); | |
556 | INIT_LIST_HEAD(&mddev->disks); | |
557 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 558 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
559 | atomic_set(&mddev->active, 1); |
560 | atomic_set(&mddev->openers, 0); | |
561 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 562 | spin_lock_init(&mddev->lock); |
fafd7fb0 N |
563 | init_waitqueue_head(&mddev->sb_wait); |
564 | init_waitqueue_head(&mddev->recovery_wait); | |
565 | mddev->reshape_position = MaxSector; | |
2c810cdd | 566 | mddev->reshape_backwards = 0; |
c4a39551 | 567 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
568 | mddev->resync_min = 0; |
569 | mddev->resync_max = MaxSector; | |
570 | mddev->level = LEVEL_NONE; | |
571 | } | |
390ee602 | 572 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 573 | |
f72ffdd6 | 574 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 575 | { |
fd01b88c | 576 | struct mddev *mddev, *new = NULL; |
1da177e4 | 577 | |
8f5f02c4 N |
578 | if (unit && MAJOR(unit) != MD_MAJOR) |
579 | unit &= ~((1<<MdpMinorShift)-1); | |
580 | ||
1da177e4 LT |
581 | retry: |
582 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
583 | |
584 | if (unit) { | |
585 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
586 | if (mddev->unit == unit) { | |
587 | mddev_get(mddev); | |
588 | spin_unlock(&all_mddevs_lock); | |
589 | kfree(new); | |
590 | return mddev; | |
591 | } | |
592 | ||
593 | if (new) { | |
594 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 595 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
596 | new->hold_active = UNTIL_IOCTL; |
597 | return new; | |
1da177e4 | 598 | } |
efeb53c0 N |
599 | } else if (new) { |
600 | /* find an unused unit number */ | |
601 | static int next_minor = 512; | |
602 | int start = next_minor; | |
603 | int is_free = 0; | |
604 | int dev = 0; | |
605 | while (!is_free) { | |
606 | dev = MKDEV(MD_MAJOR, next_minor); | |
607 | next_minor++; | |
608 | if (next_minor > MINORMASK) | |
609 | next_minor = 0; | |
610 | if (next_minor == start) { | |
611 | /* Oh dear, all in use. */ | |
612 | spin_unlock(&all_mddevs_lock); | |
613 | kfree(new); | |
614 | return NULL; | |
615 | } | |
f72ffdd6 | 616 | |
efeb53c0 N |
617 | is_free = 1; |
618 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
619 | if (mddev->unit == dev) { | |
620 | is_free = 0; | |
621 | break; | |
622 | } | |
623 | } | |
624 | new->unit = dev; | |
625 | new->md_minor = MINOR(dev); | |
626 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
627 | list_add(&new->all_mddevs, &all_mddevs); |
628 | spin_unlock(&all_mddevs_lock); | |
629 | return new; | |
630 | } | |
631 | spin_unlock(&all_mddevs_lock); | |
632 | ||
9ffae0cf | 633 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
634 | if (!new) |
635 | return NULL; | |
636 | ||
1da177e4 LT |
637 | new->unit = unit; |
638 | if (MAJOR(unit) == MD_MAJOR) | |
639 | new->md_minor = MINOR(unit); | |
640 | else | |
641 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
642 | ||
fafd7fb0 | 643 | mddev_init(new); |
1da177e4 | 644 | |
1da177e4 LT |
645 | goto retry; |
646 | } | |
647 | ||
b6eb127d N |
648 | static struct attribute_group md_redundancy_group; |
649 | ||
5c47daf6 | 650 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 651 | { |
a64c876f | 652 | if (mddev->to_remove) { |
b6eb127d N |
653 | /* These cannot be removed under reconfig_mutex as |
654 | * an access to the files will try to take reconfig_mutex | |
655 | * while holding the file unremovable, which leads to | |
656 | * a deadlock. | |
bb4f1e9d N |
657 | * So hold set sysfs_active while the remove in happeing, |
658 | * and anything else which might set ->to_remove or my | |
659 | * otherwise change the sysfs namespace will fail with | |
660 | * -EBUSY if sysfs_active is still set. | |
661 | * We set sysfs_active under reconfig_mutex and elsewhere | |
662 | * test it under the same mutex to ensure its correct value | |
663 | * is seen. | |
b6eb127d | 664 | */ |
a64c876f N |
665 | struct attribute_group *to_remove = mddev->to_remove; |
666 | mddev->to_remove = NULL; | |
bb4f1e9d | 667 | mddev->sysfs_active = 1; |
b6eb127d N |
668 | mutex_unlock(&mddev->reconfig_mutex); |
669 | ||
00bcb4ac N |
670 | if (mddev->kobj.sd) { |
671 | if (to_remove != &md_redundancy_group) | |
672 | sysfs_remove_group(&mddev->kobj, to_remove); | |
673 | if (mddev->pers == NULL || | |
674 | mddev->pers->sync_request == NULL) { | |
675 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
676 | if (mddev->sysfs_action) | |
677 | sysfs_put(mddev->sysfs_action); | |
678 | mddev->sysfs_action = NULL; | |
679 | } | |
a64c876f | 680 | } |
bb4f1e9d | 681 | mddev->sysfs_active = 0; |
b6eb127d N |
682 | } else |
683 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 684 | |
751e67ca CD |
685 | /* As we've dropped the mutex we need a spinlock to |
686 | * make sure the thread doesn't disappear | |
01f96c0a N |
687 | */ |
688 | spin_lock(&pers_lock); | |
005eca5e | 689 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 690 | wake_up(&mddev->sb_wait); |
01f96c0a | 691 | spin_unlock(&pers_lock); |
1da177e4 | 692 | } |
5c47daf6 | 693 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 694 | |
57d051dc | 695 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
696 | { |
697 | struct md_rdev *rdev; | |
698 | ||
699 | rdev_for_each_rcu(rdev, mddev) | |
700 | if (rdev->desc_nr == nr) | |
701 | return rdev; | |
702 | ||
703 | return NULL; | |
704 | } | |
57d051dc | 705 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
706 | |
707 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 708 | { |
3cb03002 | 709 | struct md_rdev *rdev; |
1da177e4 | 710 | |
dafb20fa | 711 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
712 | if (rdev->bdev->bd_dev == dev) |
713 | return rdev; | |
159ec1fc | 714 | |
1da177e4 LT |
715 | return NULL; |
716 | } | |
717 | ||
1532d9e8 | 718 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
719 | { |
720 | struct md_rdev *rdev; | |
721 | ||
722 | rdev_for_each_rcu(rdev, mddev) | |
723 | if (rdev->bdev->bd_dev == dev) | |
724 | return rdev; | |
725 | ||
726 | return NULL; | |
727 | } | |
1532d9e8 | 728 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 729 | |
84fc4b56 | 730 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 731 | { |
84fc4b56 | 732 | struct md_personality *pers; |
d9d166c2 N |
733 | list_for_each_entry(pers, &pers_list, list) { |
734 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 735 | return pers; |
d9d166c2 N |
736 | if (strcmp(pers->name, clevel)==0) |
737 | return pers; | |
738 | } | |
2604b703 N |
739 | return NULL; |
740 | } | |
741 | ||
b73df2d3 | 742 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 743 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 744 | { |
57b2caa3 | 745 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 746 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
747 | } |
748 | ||
f72ffdd6 | 749 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 750 | { |
1da177e4 | 751 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 752 | if (!rdev->sb_page) |
ebc24337 | 753 | return -ENOMEM; |
1da177e4 LT |
754 | return 0; |
755 | } | |
756 | ||
545c8795 | 757 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
758 | { |
759 | if (rdev->sb_page) { | |
2d1f3b5d | 760 | put_page(rdev->sb_page); |
1da177e4 LT |
761 | rdev->sb_loaded = 0; |
762 | rdev->sb_page = NULL; | |
0f420358 | 763 | rdev->sb_start = 0; |
dd8ac336 | 764 | rdev->sectors = 0; |
1da177e4 | 765 | } |
2699b672 N |
766 | if (rdev->bb_page) { |
767 | put_page(rdev->bb_page); | |
768 | rdev->bb_page = NULL; | |
769 | } | |
d3b407fb | 770 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 771 | } |
545c8795 | 772 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 773 | |
4246a0b6 | 774 | static void super_written(struct bio *bio) |
7bfa19f2 | 775 | { |
3cb03002 | 776 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 777 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 778 | |
4e4cbee9 CH |
779 | if (bio->bi_status) { |
780 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 781 | md_error(mddev, rdev); |
46533ff7 N |
782 | if (!test_bit(Faulty, &rdev->flags) |
783 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 784 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
785 | set_bit(LastDev, &rdev->flags); |
786 | } | |
787 | } else | |
788 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 789 | |
a9701a30 N |
790 | if (atomic_dec_and_test(&mddev->pending_writes)) |
791 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 792 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 793 | bio_put(bio); |
7bfa19f2 N |
794 | } |
795 | ||
fd01b88c | 796 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
797 | sector_t sector, int size, struct page *page) |
798 | { | |
799 | /* write first size bytes of page to sector of rdev | |
800 | * Increment mddev->pending_writes before returning | |
801 | * and decrement it on completion, waking up sb_wait | |
802 | * if zero is reached. | |
803 | * If an error occurred, call md_error | |
804 | */ | |
46533ff7 N |
805 | struct bio *bio; |
806 | int ff = 0; | |
807 | ||
4b6c1060 HM |
808 | if (!page) |
809 | return; | |
810 | ||
46533ff7 N |
811 | if (test_bit(Faulty, &rdev->flags)) |
812 | return; | |
813 | ||
5a85071c | 814 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 815 | |
ed3b98c7 SL |
816 | atomic_inc(&rdev->nr_pending); |
817 | ||
74d46992 | 818 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 819 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
820 | bio_add_page(bio, page, size, 0); |
821 | bio->bi_private = rdev; | |
822 | bio->bi_end_io = super_written; | |
46533ff7 N |
823 | |
824 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
825 | test_bit(FailFast, &rdev->flags) && | |
826 | !test_bit(LastDev, &rdev->flags)) | |
827 | ff = MD_FAILFAST; | |
5a8948f8 | 828 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 829 | |
7bfa19f2 | 830 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 831 | submit_bio(bio); |
a9701a30 N |
832 | } |
833 | ||
46533ff7 | 834 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 835 | { |
e9c7469b | 836 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 837 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 838 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
839 | return -EAGAIN; |
840 | return 0; | |
7bfa19f2 N |
841 | } |
842 | ||
3cb03002 | 843 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 844 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 845 | { |
5a85071c | 846 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
847 | int ret; |
848 | ||
74d46992 CH |
849 | if (metadata_op && rdev->meta_bdev) |
850 | bio_set_dev(bio, rdev->meta_bdev); | |
851 | else | |
852 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 853 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 854 | if (metadata_op) |
4f024f37 | 855 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
856 | else if (rdev->mddev->reshape_position != MaxSector && |
857 | (rdev->mddev->reshape_backwards == | |
858 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 859 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 860 | else |
4f024f37 | 861 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 862 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
863 | |
864 | submit_bio_wait(bio); | |
1da177e4 | 865 | |
4e4cbee9 | 866 | ret = !bio->bi_status; |
1da177e4 LT |
867 | bio_put(bio); |
868 | return ret; | |
869 | } | |
a8745db2 | 870 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 871 | |
f72ffdd6 | 872 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
873 | { |
874 | char b[BDEVNAME_SIZE]; | |
403df478 | 875 | |
1da177e4 LT |
876 | if (rdev->sb_loaded) |
877 | return 0; | |
878 | ||
796a5cf0 | 879 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
880 | goto fail; |
881 | rdev->sb_loaded = 1; | |
882 | return 0; | |
883 | ||
884 | fail: | |
9d48739e N |
885 | pr_err("md: disabled device %s, could not read superblock.\n", |
886 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
887 | return -EINVAL; |
888 | } | |
889 | ||
e6fd2093 | 890 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 891 | { |
f72ffdd6 | 892 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
893 | sb1->set_uuid1 == sb2->set_uuid1 && |
894 | sb1->set_uuid2 == sb2->set_uuid2 && | |
895 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
896 | } |
897 | ||
e6fd2093 | 898 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
899 | { |
900 | int ret; | |
901 | mdp_super_t *tmp1, *tmp2; | |
902 | ||
903 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
904 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
905 | ||
906 | if (!tmp1 || !tmp2) { | |
907 | ret = 0; | |
1da177e4 LT |
908 | goto abort; |
909 | } | |
910 | ||
911 | *tmp1 = *sb1; | |
912 | *tmp2 = *sb2; | |
913 | ||
914 | /* | |
915 | * nr_disks is not constant | |
916 | */ | |
917 | tmp1->nr_disks = 0; | |
918 | tmp2->nr_disks = 0; | |
919 | ||
ce0c8e05 | 920 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 921 | abort: |
990a8baf JJ |
922 | kfree(tmp1); |
923 | kfree(tmp2); | |
1da177e4 LT |
924 | return ret; |
925 | } | |
926 | ||
4d167f09 N |
927 | static u32 md_csum_fold(u32 csum) |
928 | { | |
929 | csum = (csum & 0xffff) + (csum >> 16); | |
930 | return (csum & 0xffff) + (csum >> 16); | |
931 | } | |
932 | ||
f72ffdd6 | 933 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 934 | { |
4d167f09 N |
935 | u64 newcsum = 0; |
936 | u32 *sb32 = (u32*)sb; | |
937 | int i; | |
1da177e4 LT |
938 | unsigned int disk_csum, csum; |
939 | ||
940 | disk_csum = sb->sb_csum; | |
941 | sb->sb_csum = 0; | |
4d167f09 N |
942 | |
943 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
944 | newcsum += sb32[i]; | |
945 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
946 | ||
4d167f09 N |
947 | #ifdef CONFIG_ALPHA |
948 | /* This used to use csum_partial, which was wrong for several | |
949 | * reasons including that different results are returned on | |
950 | * different architectures. It isn't critical that we get exactly | |
951 | * the same return value as before (we always csum_fold before | |
952 | * testing, and that removes any differences). However as we | |
953 | * know that csum_partial always returned a 16bit value on | |
954 | * alphas, do a fold to maximise conformity to previous behaviour. | |
955 | */ | |
956 | sb->sb_csum = md_csum_fold(disk_csum); | |
957 | #else | |
1da177e4 | 958 | sb->sb_csum = disk_csum; |
4d167f09 | 959 | #endif |
1da177e4 LT |
960 | return csum; |
961 | } | |
962 | ||
1da177e4 LT |
963 | /* |
964 | * Handle superblock details. | |
965 | * We want to be able to handle multiple superblock formats | |
966 | * so we have a common interface to them all, and an array of | |
967 | * different handlers. | |
968 | * We rely on user-space to write the initial superblock, and support | |
969 | * reading and updating of superblocks. | |
970 | * Interface methods are: | |
3cb03002 | 971 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
972 | * loads and validates a superblock on dev. |
973 | * if refdev != NULL, compare superblocks on both devices | |
974 | * Return: | |
975 | * 0 - dev has a superblock that is compatible with refdev | |
976 | * 1 - dev has a superblock that is compatible and newer than refdev | |
977 | * so dev should be used as the refdev in future | |
978 | * -EINVAL superblock incompatible or invalid | |
979 | * -othererror e.g. -EIO | |
980 | * | |
fd01b88c | 981 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
982 | * Verify that dev is acceptable into mddev. |
983 | * The first time, mddev->raid_disks will be 0, and data from | |
984 | * dev should be merged in. Subsequent calls check that dev | |
985 | * is new enough. Return 0 or -EINVAL | |
986 | * | |
fd01b88c | 987 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
988 | * Update the superblock for rdev with data in mddev |
989 | * This does not write to disc. | |
990 | * | |
991 | */ | |
992 | ||
993 | struct super_type { | |
0cd17fec CW |
994 | char *name; |
995 | struct module *owner; | |
c6563a8c N |
996 | int (*load_super)(struct md_rdev *rdev, |
997 | struct md_rdev *refdev, | |
0cd17fec | 998 | int minor_version); |
c6563a8c N |
999 | int (*validate_super)(struct mddev *mddev, |
1000 | struct md_rdev *rdev); | |
1001 | void (*sync_super)(struct mddev *mddev, | |
1002 | struct md_rdev *rdev); | |
3cb03002 | 1003 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1004 | sector_t num_sectors); |
c6563a8c N |
1005 | int (*allow_new_offset)(struct md_rdev *rdev, |
1006 | unsigned long long new_offset); | |
1da177e4 LT |
1007 | }; |
1008 | ||
0894cc30 AN |
1009 | /* |
1010 | * Check that the given mddev has no bitmap. | |
1011 | * | |
1012 | * This function is called from the run method of all personalities that do not | |
1013 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1014 | * has a bitmap. Otherwise, it returns 0. | |
1015 | * | |
1016 | */ | |
fd01b88c | 1017 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1018 | { |
c3d9714e | 1019 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1020 | return 0; |
9d48739e | 1021 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1022 | mdname(mddev), mddev->pers->name); |
1023 | return 1; | |
1024 | } | |
1025 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1026 | ||
1da177e4 | 1027 | /* |
f72ffdd6 | 1028 | * load_super for 0.90.0 |
1da177e4 | 1029 | */ |
3cb03002 | 1030 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1031 | { |
1032 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1033 | mdp_super_t *sb; | |
1034 | int ret; | |
1da177e4 LT |
1035 | |
1036 | /* | |
0f420358 | 1037 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1038 | * it's at the end of the disk. |
1039 | * | |
1040 | * It also happens to be a multiple of 4Kb. | |
1041 | */ | |
57b2caa3 | 1042 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1043 | |
0002b271 | 1044 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1045 | if (ret) |
1046 | return ret; | |
1da177e4 LT |
1047 | |
1048 | ret = -EINVAL; | |
1049 | ||
1050 | bdevname(rdev->bdev, b); | |
65a06f06 | 1051 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1052 | |
1053 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1054 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1055 | goto abort; |
1056 | } | |
1057 | ||
1058 | if (sb->major_version != 0 || | |
f6705578 N |
1059 | sb->minor_version < 90 || |
1060 | sb->minor_version > 91) { | |
9d48739e N |
1061 | pr_warn("Bad version number %d.%d on %s\n", |
1062 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1063 | goto abort; |
1064 | } | |
1065 | ||
1066 | if (sb->raid_disks <= 0) | |
1067 | goto abort; | |
1068 | ||
4d167f09 | 1069 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1070 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1071 | goto abort; |
1072 | } | |
1073 | ||
1074 | rdev->preferred_minor = sb->md_minor; | |
1075 | rdev->data_offset = 0; | |
c6563a8c | 1076 | rdev->new_data_offset = 0; |
0002b271 | 1077 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1078 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1079 | |
1080 | if (sb->level == LEVEL_MULTIPATH) | |
1081 | rdev->desc_nr = -1; | |
1082 | else | |
1083 | rdev->desc_nr = sb->this_disk.number; | |
1084 | ||
9a7b2b0f | 1085 | if (!refdev) { |
1da177e4 | 1086 | ret = 1; |
9a7b2b0f | 1087 | } else { |
1da177e4 | 1088 | __u64 ev1, ev2; |
65a06f06 | 1089 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1090 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1091 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1092 | b, bdevname(refdev->bdev,b2)); |
1093 | goto abort; | |
1094 | } | |
e6fd2093 | 1095 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1096 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1097 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1098 | goto abort; |
1099 | } | |
1100 | ev1 = md_event(sb); | |
1101 | ev2 = md_event(refsb); | |
1102 | if (ev1 > ev2) | |
1103 | ret = 1; | |
f72ffdd6 | 1104 | else |
1da177e4 LT |
1105 | ret = 0; |
1106 | } | |
8190e754 | 1107 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1108 | /* Limit to 4TB as metadata cannot record more than that. |
1109 | * (not needed for Linear and RAID0 as metadata doesn't | |
1110 | * record this size) | |
1111 | */ | |
3312c951 AB |
1112 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)rdev->sectors >= (2ULL << 32) && |
1113 | sb->level >= 1) | |
1114 | rdev->sectors = (sector_t)(2ULL << 32) - 2; | |
1da177e4 | 1115 | |
27a7b260 | 1116 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1117 | /* "this cannot possibly happen" ... */ |
1118 | ret = -EINVAL; | |
1119 | ||
1da177e4 LT |
1120 | abort: |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * validate_super for 0.90.0 | |
1126 | */ | |
fd01b88c | 1127 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1128 | { |
1129 | mdp_disk_t *desc; | |
65a06f06 | 1130 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1131 | __u64 ev1 = md_event(sb); |
1da177e4 | 1132 | |
41158c7e | 1133 | rdev->raid_disk = -1; |
c5d79adb N |
1134 | clear_bit(Faulty, &rdev->flags); |
1135 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1136 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1137 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1138 | |
1da177e4 LT |
1139 | if (mddev->raid_disks == 0) { |
1140 | mddev->major_version = 0; | |
1141 | mddev->minor_version = sb->minor_version; | |
1142 | mddev->patch_version = sb->patch_version; | |
e691063a | 1143 | mddev->external = 0; |
9d8f0363 | 1144 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1145 | mddev->ctime = sb->ctime; |
1146 | mddev->utime = sb->utime; | |
1147 | mddev->level = sb->level; | |
d9d166c2 | 1148 | mddev->clevel[0] = 0; |
1da177e4 LT |
1149 | mddev->layout = sb->layout; |
1150 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1151 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1152 | mddev->events = ev1; |
c3d9714e | 1153 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1154 | mddev->bitmap_info.space = 0; |
1155 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1156 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1157 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1158 | mddev->reshape_backwards = 0; |
1da177e4 | 1159 | |
f6705578 N |
1160 | if (mddev->minor_version >= 91) { |
1161 | mddev->reshape_position = sb->reshape_position; | |
1162 | mddev->delta_disks = sb->delta_disks; | |
1163 | mddev->new_level = sb->new_level; | |
1164 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1165 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1166 | if (mddev->delta_disks < 0) |
1167 | mddev->reshape_backwards = 1; | |
f6705578 N |
1168 | } else { |
1169 | mddev->reshape_position = MaxSector; | |
1170 | mddev->delta_disks = 0; | |
1171 | mddev->new_level = mddev->level; | |
1172 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1173 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1174 | } |
1175 | ||
1da177e4 LT |
1176 | if (sb->state & (1<<MD_SB_CLEAN)) |
1177 | mddev->recovery_cp = MaxSector; | |
1178 | else { | |
f72ffdd6 | 1179 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1180 | sb->events_lo == sb->cp_events_lo) { |
1181 | mddev->recovery_cp = sb->recovery_cp; | |
1182 | } else | |
1183 | mddev->recovery_cp = 0; | |
1184 | } | |
1185 | ||
1186 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1187 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1188 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1189 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1190 | ||
1191 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1192 | |
1193 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1194 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1195 | mddev->bitmap_info.offset = |
1196 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1197 | mddev->bitmap_info.space = |
c9ad020f | 1198 | mddev->bitmap_info.default_space; |
6409bb05 | 1199 | } |
a654b9d8 | 1200 | |
41158c7e | 1201 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1202 | /* Insist on good event counter while assembling, except |
1203 | * for spares (which don't need an event count) */ | |
1da177e4 | 1204 | ++ev1; |
be6800a7 N |
1205 | if (sb->disks[rdev->desc_nr].state & ( |
1206 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1207 | if (ev1 < mddev->events) |
be6800a7 | 1208 | return -EINVAL; |
41158c7e N |
1209 | } else if (mddev->bitmap) { |
1210 | /* if adding to array with a bitmap, then we can accept an | |
1211 | * older device ... but not too old. | |
1212 | */ | |
41158c7e N |
1213 | if (ev1 < mddev->bitmap->events_cleared) |
1214 | return 0; | |
8313b8e5 N |
1215 | if (ev1 < mddev->events) |
1216 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1217 | } else { |
1218 | if (ev1 < mddev->events) | |
1219 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1220 | return 0; | |
1221 | } | |
41158c7e | 1222 | |
1da177e4 | 1223 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1224 | desc = sb->disks + rdev->desc_nr; |
1225 | ||
1226 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1227 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1228 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1229 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1230 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1231 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1232 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1233 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1234 | /* active but not in sync implies recovery up to | |
1235 | * reshape position. We don't know exactly where | |
1236 | * that is, so set to zero for now */ | |
1237 | if (mddev->minor_version >= 91) { | |
1238 | rdev->recovery_offset = 0; | |
1239 | rdev->raid_disk = desc->raid_disk; | |
1240 | } | |
1da177e4 | 1241 | } |
8ddf9efe N |
1242 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1243 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1244 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1245 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1246 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1247 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1248 | return 0; |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * sync_super for 0.90.0 | |
1253 | */ | |
fd01b88c | 1254 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1255 | { |
1256 | mdp_super_t *sb; | |
3cb03002 | 1257 | struct md_rdev *rdev2; |
1da177e4 | 1258 | int next_spare = mddev->raid_disks; |
19133a42 | 1259 | |
1da177e4 LT |
1260 | /* make rdev->sb match mddev data.. |
1261 | * | |
1262 | * 1/ zero out disks | |
1263 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1264 | * 3/ any empty disks < next_spare become removed | |
1265 | * | |
1266 | * disks[0] gets initialised to REMOVED because | |
1267 | * we cannot be sure from other fields if it has | |
1268 | * been initialised or not. | |
1269 | */ | |
1270 | int i; | |
1271 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1272 | ||
61181565 N |
1273 | rdev->sb_size = MD_SB_BYTES; |
1274 | ||
65a06f06 | 1275 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1276 | |
1277 | memset(sb, 0, sizeof(*sb)); | |
1278 | ||
1279 | sb->md_magic = MD_SB_MAGIC; | |
1280 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1281 | sb->patch_version = mddev->patch_version; |
1282 | sb->gvalid_words = 0; /* ignored */ | |
1283 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1284 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1285 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1286 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1287 | ||
9ebc6ef1 | 1288 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1289 | sb->level = mddev->level; |
58c0fed4 | 1290 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1291 | sb->raid_disks = mddev->raid_disks; |
1292 | sb->md_minor = mddev->md_minor; | |
e691063a | 1293 | sb->not_persistent = 0; |
9ebc6ef1 | 1294 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1295 | sb->state = 0; |
1296 | sb->events_hi = (mddev->events>>32); | |
1297 | sb->events_lo = (u32)mddev->events; | |
1298 | ||
f6705578 N |
1299 | if (mddev->reshape_position == MaxSector) |
1300 | sb->minor_version = 90; | |
1301 | else { | |
1302 | sb->minor_version = 91; | |
1303 | sb->reshape_position = mddev->reshape_position; | |
1304 | sb->new_level = mddev->new_level; | |
1305 | sb->delta_disks = mddev->delta_disks; | |
1306 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1307 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1308 | } |
1309 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1310 | if (mddev->in_sync) |
1311 | { | |
1312 | sb->recovery_cp = mddev->recovery_cp; | |
1313 | sb->cp_events_hi = (mddev->events>>32); | |
1314 | sb->cp_events_lo = (u32)mddev->events; | |
1315 | if (mddev->recovery_cp == MaxSector) | |
1316 | sb->state = (1<< MD_SB_CLEAN); | |
1317 | } else | |
1318 | sb->recovery_cp = 0; | |
1319 | ||
1320 | sb->layout = mddev->layout; | |
9d8f0363 | 1321 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1322 | |
c3d9714e | 1323 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1324 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1325 | ||
1da177e4 | 1326 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1327 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1328 | mdp_disk_t *d; |
86e6ffdd | 1329 | int desc_nr; |
0261cd9f N |
1330 | int is_active = test_bit(In_sync, &rdev2->flags); |
1331 | ||
1332 | if (rdev2->raid_disk >= 0 && | |
1333 | sb->minor_version >= 91) | |
1334 | /* we have nowhere to store the recovery_offset, | |
1335 | * but if it is not below the reshape_position, | |
1336 | * we can piggy-back on that. | |
1337 | */ | |
1338 | is_active = 1; | |
1339 | if (rdev2->raid_disk < 0 || | |
1340 | test_bit(Faulty, &rdev2->flags)) | |
1341 | is_active = 0; | |
1342 | if (is_active) | |
86e6ffdd | 1343 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1344 | else |
86e6ffdd | 1345 | desc_nr = next_spare++; |
19133a42 | 1346 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1347 | d = &sb->disks[rdev2->desc_nr]; |
1348 | nr_disks++; | |
1349 | d->number = rdev2->desc_nr; | |
1350 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1351 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1352 | if (is_active) |
1da177e4 LT |
1353 | d->raid_disk = rdev2->raid_disk; |
1354 | else | |
1355 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1356 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1357 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1358 | else if (is_active) { |
1da177e4 | 1359 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1360 | if (test_bit(In_sync, &rdev2->flags)) |
1361 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1362 | active++; |
1363 | working++; | |
1364 | } else { | |
1365 | d->state = 0; | |
1366 | spare++; | |
1367 | working++; | |
1368 | } | |
8ddf9efe N |
1369 | if (test_bit(WriteMostly, &rdev2->flags)) |
1370 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1371 | if (test_bit(FailFast, &rdev2->flags)) |
1372 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1373 | } |
1da177e4 LT |
1374 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1375 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1376 | mdp_disk_t *d = &sb->disks[i]; | |
1377 | if (d->state == 0 && d->number == 0) { | |
1378 | d->number = i; | |
1379 | d->raid_disk = i; | |
1380 | d->state = (1<<MD_DISK_REMOVED); | |
1381 | d->state |= (1<<MD_DISK_FAULTY); | |
1382 | failed++; | |
1383 | } | |
1384 | } | |
1385 | sb->nr_disks = nr_disks; | |
1386 | sb->active_disks = active; | |
1387 | sb->working_disks = working; | |
1388 | sb->failed_disks = failed; | |
1389 | sb->spare_disks = spare; | |
1390 | ||
1391 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1392 | sb->sb_csum = calc_sb_csum(sb); | |
1393 | } | |
1394 | ||
0cd17fec CW |
1395 | /* |
1396 | * rdev_size_change for 0.90.0 | |
1397 | */ | |
1398 | static unsigned long long | |
3cb03002 | 1399 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1400 | { |
58c0fed4 | 1401 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1402 | return 0; /* component must fit device */ |
c3d9714e | 1403 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1404 | return 0; /* can't move bitmap */ |
57b2caa3 | 1405 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1406 | if (!num_sectors || num_sectors > rdev->sb_start) |
1407 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1408 | /* Limit to 4TB as metadata cannot record more than that. |
1409 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1410 | */ | |
3312c951 AB |
1411 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)num_sectors >= (2ULL << 32) && |
1412 | rdev->mddev->level >= 1) | |
1413 | num_sectors = (sector_t)(2ULL << 32) - 2; | |
46533ff7 N |
1414 | do { |
1415 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1416 | rdev->sb_page); |
46533ff7 | 1417 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1418 | return num_sectors; |
0cd17fec CW |
1419 | } |
1420 | ||
c6563a8c N |
1421 | static int |
1422 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1423 | { | |
1424 | /* non-zero offset changes not possible with v0.90 */ | |
1425 | return new_offset == 0; | |
1426 | } | |
0cd17fec | 1427 | |
1da177e4 LT |
1428 | /* |
1429 | * version 1 superblock | |
1430 | */ | |
1431 | ||
f72ffdd6 | 1432 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1433 | { |
1c05b4bc N |
1434 | __le32 disk_csum; |
1435 | u32 csum; | |
1da177e4 LT |
1436 | unsigned long long newcsum; |
1437 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1438 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1439 | |
1440 | disk_csum = sb->sb_csum; | |
1441 | sb->sb_csum = 0; | |
1442 | newcsum = 0; | |
1f3c9907 | 1443 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1444 | newcsum += le32_to_cpu(*isuper++); |
1445 | ||
1446 | if (size == 2) | |
1c05b4bc | 1447 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1448 | |
1449 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1450 | sb->sb_csum = disk_csum; | |
1451 | return cpu_to_le32(csum); | |
1452 | } | |
1453 | ||
3cb03002 | 1454 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1455 | { |
1456 | struct mdp_superblock_1 *sb; | |
1457 | int ret; | |
0f420358 | 1458 | sector_t sb_start; |
c6563a8c | 1459 | sector_t sectors; |
1da177e4 | 1460 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1461 | int bmask; |
1da177e4 LT |
1462 | |
1463 | /* | |
0f420358 | 1464 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1465 | * It is always aligned to a 4K boundary and |
1466 | * depeding on minor_version, it can be: | |
1467 | * 0: At least 8K, but less than 12K, from end of device | |
1468 | * 1: At start of device | |
1469 | * 2: 4K from start of device. | |
1470 | */ | |
1471 | switch(minor_version) { | |
1472 | case 0: | |
77304d2a | 1473 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1474 | sb_start -= 8*2; |
1475 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1476 | break; |
1477 | case 1: | |
0f420358 | 1478 | sb_start = 0; |
1da177e4 LT |
1479 | break; |
1480 | case 2: | |
0f420358 | 1481 | sb_start = 8; |
1da177e4 LT |
1482 | break; |
1483 | default: | |
1484 | return -EINVAL; | |
1485 | } | |
0f420358 | 1486 | rdev->sb_start = sb_start; |
1da177e4 | 1487 | |
0002b271 N |
1488 | /* superblock is rarely larger than 1K, but it can be larger, |
1489 | * and it is safe to read 4k, so we do that | |
1490 | */ | |
1491 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1492 | if (ret) return ret; |
1493 | ||
65a06f06 | 1494 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1495 | |
1496 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1497 | sb->major_version != cpu_to_le32(1) || | |
1498 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1499 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1500 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1501 | return -EINVAL; |
1502 | ||
1503 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1504 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1505 | bdevname(rdev->bdev,b)); |
1506 | return -EINVAL; | |
1507 | } | |
1508 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1509 | pr_warn("md: data_size too small on %s\n", |
1510 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1511 | return -EINVAL; |
1512 | } | |
c6563a8c N |
1513 | if (sb->pad0 || |
1514 | sb->pad3[0] || | |
1515 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1516 | /* Some padding is non-zero, might be a new feature */ | |
1517 | return -EINVAL; | |
e11e93fa | 1518 | |
1da177e4 LT |
1519 | rdev->preferred_minor = 0xffff; |
1520 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1521 | rdev->new_data_offset = rdev->data_offset; |
1522 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1523 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1524 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1525 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1526 | |
0002b271 | 1527 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1528 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1529 | if (rdev->sb_size & bmask) |
a1801f85 N |
1530 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1531 | ||
1532 | if (minor_version | |
0f420358 | 1533 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1534 | return -EINVAL; |
c6563a8c N |
1535 | if (minor_version |
1536 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1537 | return -EINVAL; | |
0002b271 | 1538 | |
31b65a0d N |
1539 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1540 | rdev->desc_nr = -1; | |
1541 | else | |
1542 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1543 | ||
2699b672 N |
1544 | if (!rdev->bb_page) { |
1545 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1546 | if (!rdev->bb_page) | |
1547 | return -ENOMEM; | |
1548 | } | |
1549 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1550 | rdev->badblocks.count == 0) { | |
1551 | /* need to load the bad block list. | |
1552 | * Currently we limit it to one page. | |
1553 | */ | |
1554 | s32 offset; | |
1555 | sector_t bb_sector; | |
1556 | u64 *bbp; | |
1557 | int i; | |
1558 | int sectors = le16_to_cpu(sb->bblog_size); | |
1559 | if (sectors > (PAGE_SIZE / 512)) | |
1560 | return -EINVAL; | |
1561 | offset = le32_to_cpu(sb->bblog_offset); | |
1562 | if (offset == 0) | |
1563 | return -EINVAL; | |
1564 | bb_sector = (long long)offset; | |
1565 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1566 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 N |
1567 | return -EIO; |
1568 | bbp = (u64 *)page_address(rdev->bb_page); | |
1569 | rdev->badblocks.shift = sb->bblog_shift; | |
1570 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1571 | u64 bb = le64_to_cpu(*bbp); | |
1572 | int count = bb & (0x3ff); | |
1573 | u64 sector = bb >> 10; | |
1574 | sector <<= sb->bblog_shift; | |
1575 | count <<= sb->bblog_shift; | |
1576 | if (bb + 1 == 0) | |
1577 | break; | |
fc974ee2 | 1578 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1579 | return -EINVAL; |
1580 | } | |
486adf72 N |
1581 | } else if (sb->bblog_offset != 0) |
1582 | rdev->badblocks.shift = 0; | |
2699b672 | 1583 | |
ddc08823 PB |
1584 | if ((le32_to_cpu(sb->feature_map) & |
1585 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1586 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1587 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1588 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1589 | } | |
1590 | ||
9a7b2b0f | 1591 | if (!refdev) { |
8ed75463 | 1592 | ret = 1; |
9a7b2b0f | 1593 | } else { |
1da177e4 | 1594 | __u64 ev1, ev2; |
65a06f06 | 1595 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1596 | |
1597 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1598 | sb->level != refsb->level || | |
1599 | sb->layout != refsb->layout || | |
1600 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1601 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1602 | bdevname(rdev->bdev,b), |
1603 | bdevname(refdev->bdev,b2)); | |
1604 | return -EINVAL; | |
1605 | } | |
1606 | ev1 = le64_to_cpu(sb->events); | |
1607 | ev2 = le64_to_cpu(refsb->events); | |
1608 | ||
1609 | if (ev1 > ev2) | |
8ed75463 N |
1610 | ret = 1; |
1611 | else | |
1612 | ret = 0; | |
1da177e4 | 1613 | } |
c6563a8c N |
1614 | if (minor_version) { |
1615 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1616 | sectors -= rdev->data_offset; | |
1617 | } else | |
1618 | sectors = rdev->sb_start; | |
1619 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1620 | return -EINVAL; |
dd8ac336 | 1621 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1622 | return ret; |
1da177e4 LT |
1623 | } |
1624 | ||
fd01b88c | 1625 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1626 | { |
65a06f06 | 1627 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1628 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1629 | |
41158c7e | 1630 | rdev->raid_disk = -1; |
c5d79adb N |
1631 | clear_bit(Faulty, &rdev->flags); |
1632 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1633 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1634 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1635 | |
1da177e4 LT |
1636 | if (mddev->raid_disks == 0) { |
1637 | mddev->major_version = 1; | |
1638 | mddev->patch_version = 0; | |
e691063a | 1639 | mddev->external = 0; |
9d8f0363 | 1640 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1641 | mddev->ctime = le64_to_cpu(sb->ctime); |
1642 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1643 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1644 | mddev->clevel[0] = 0; |
1da177e4 LT |
1645 | mddev->layout = le32_to_cpu(sb->layout); |
1646 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1647 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1648 | mddev->events = ev1; |
c3d9714e | 1649 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1650 | mddev->bitmap_info.space = 0; |
1651 | /* Default location for bitmap is 1K after superblock | |
1652 | * using 3K - total of 4K | |
1653 | */ | |
c3d9714e | 1654 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1655 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1656 | mddev->reshape_backwards = 0; |
1657 | ||
1da177e4 LT |
1658 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1659 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1660 | ||
1661 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1662 | |
71c0805c | 1663 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1664 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1665 | mddev->bitmap_info.offset = |
1666 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1667 | /* Metadata doesn't record how much space is available. |
1668 | * For 1.0, we assume we can use up to the superblock | |
1669 | * if before, else to 4K beyond superblock. | |
1670 | * For others, assume no change is possible. | |
1671 | */ | |
1672 | if (mddev->minor_version > 0) | |
1673 | mddev->bitmap_info.space = 0; | |
1674 | else if (mddev->bitmap_info.offset > 0) | |
1675 | mddev->bitmap_info.space = | |
1676 | 8 - mddev->bitmap_info.offset; | |
1677 | else | |
1678 | mddev->bitmap_info.space = | |
1679 | -mddev->bitmap_info.offset; | |
1680 | } | |
e11e93fa | 1681 | |
f6705578 N |
1682 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1683 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1684 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1685 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1686 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1687 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1688 | if (mddev->delta_disks < 0 || |
1689 | (mddev->delta_disks == 0 && | |
1690 | (le32_to_cpu(sb->feature_map) | |
1691 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1692 | mddev->reshape_backwards = 1; | |
f6705578 N |
1693 | } else { |
1694 | mddev->reshape_position = MaxSector; | |
1695 | mddev->delta_disks = 0; | |
1696 | mddev->new_level = mddev->level; | |
1697 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1698 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1699 | } |
1700 | ||
486b0f7b | 1701 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1702 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1703 | |
ddc08823 PB |
1704 | if (le32_to_cpu(sb->feature_map) & |
1705 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1706 | if (le32_to_cpu(sb->feature_map) & |
1707 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1708 | return -EINVAL; | |
ddc08823 PB |
1709 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1710 | (le32_to_cpu(sb->feature_map) & | |
1711 | MD_FEATURE_MULTIPLE_PPLS)) | |
1712 | return -EINVAL; | |
ea0213e0 AP |
1713 | set_bit(MD_HAS_PPL, &mddev->flags); |
1714 | } | |
41158c7e | 1715 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1716 | /* Insist of good event counter while assembling, except for |
1717 | * spares (which don't need an event count) */ | |
1da177e4 | 1718 | ++ev1; |
be6800a7 N |
1719 | if (rdev->desc_nr >= 0 && |
1720 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1721 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1722 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1723 | if (ev1 < mddev->events) |
1724 | return -EINVAL; | |
41158c7e N |
1725 | } else if (mddev->bitmap) { |
1726 | /* If adding to array with a bitmap, then we can accept an | |
1727 | * older device, but not too old. | |
1728 | */ | |
41158c7e N |
1729 | if (ev1 < mddev->bitmap->events_cleared) |
1730 | return 0; | |
8313b8e5 N |
1731 | if (ev1 < mddev->events) |
1732 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1733 | } else { |
1734 | if (ev1 < mddev->events) | |
1735 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1736 | return 0; | |
1737 | } | |
1da177e4 LT |
1738 | if (mddev->level != LEVEL_MULTIPATH) { |
1739 | int role; | |
3673f305 N |
1740 | if (rdev->desc_nr < 0 || |
1741 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1742 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1743 | rdev->desc_nr = -1; |
1744 | } else | |
1745 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1746 | switch(role) { |
c4d4c91b | 1747 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1748 | break; |
c4d4c91b | 1749 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1750 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1751 | break; |
bac624f3 SL |
1752 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1753 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1754 | /* journal device without journal feature */ | |
9d48739e | 1755 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1756 | return -EINVAL; |
1757 | } | |
1758 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1759 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1760 | rdev->raid_disk = 0; |
bac624f3 | 1761 | break; |
1da177e4 | 1762 | default: |
f466722c | 1763 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1764 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1765 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1766 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1767 | if (!(le32_to_cpu(sb->feature_map) & |
1768 | MD_FEATURE_RECOVERY_BITMAP)) | |
1769 | rdev->saved_raid_disk = -1; | |
1770 | } else | |
5fd6c1dc | 1771 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1772 | rdev->raid_disk = role; |
1773 | break; | |
1774 | } | |
8ddf9efe N |
1775 | if (sb->devflags & WriteMostly1) |
1776 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1777 | if (sb->devflags & FailFast1) |
1778 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1779 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1780 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1781 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1782 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1783 | |
1da177e4 LT |
1784 | return 0; |
1785 | } | |
1786 | ||
fd01b88c | 1787 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1788 | { |
1789 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1790 | struct md_rdev *rdev2; |
1da177e4 LT |
1791 | int max_dev, i; |
1792 | /* make rdev->sb match mddev and rdev data. */ | |
1793 | ||
65a06f06 | 1794 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1795 | |
1796 | sb->feature_map = 0; | |
1797 | sb->pad0 = 0; | |
5fd6c1dc | 1798 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1799 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1800 | ||
1801 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1802 | sb->events = cpu_to_le64(mddev->events); | |
1803 | if (mddev->in_sync) | |
1804 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1805 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1806 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1807 | else |
1808 | sb->resync_offset = cpu_to_le64(0); | |
1809 | ||
1c05b4bc | 1810 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1811 | |
f0ca340c | 1812 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1813 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1814 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1815 | sb->level = cpu_to_le32(mddev->level); |
1816 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1817 | if (test_bit(FailFast, &rdev->flags)) |
1818 | sb->devflags |= FailFast1; | |
1819 | else | |
1820 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1821 | |
aeb9b211 N |
1822 | if (test_bit(WriteMostly, &rdev->flags)) |
1823 | sb->devflags |= WriteMostly1; | |
1824 | else | |
1825 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1826 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1827 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1828 | |
c3d9714e N |
1829 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1830 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1831 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1832 | } |
5fd6c1dc | 1833 | |
f2076e7d | 1834 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1835 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1836 | sb->feature_map |= |
1837 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1838 | sb->recovery_offset = | |
1839 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1840 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1841 | sb->feature_map |= | |
1842 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1843 | } |
3069aa8d SL |
1844 | /* Note: recovery_offset and journal_tail share space */ |
1845 | if (test_bit(Journal, &rdev->flags)) | |
1846 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1847 | if (test_bit(Replacement, &rdev->flags)) |
1848 | sb->feature_map |= | |
1849 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1850 | |
f6705578 N |
1851 | if (mddev->reshape_position != MaxSector) { |
1852 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1853 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1854 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1855 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1856 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1857 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1858 | if (mddev->delta_disks == 0 && |
1859 | mddev->reshape_backwards) | |
1860 | sb->feature_map | |
1861 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1862 | if (rdev->new_data_offset != rdev->data_offset) { |
1863 | sb->feature_map | |
1864 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1865 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1866 | - rdev->data_offset)); | |
1867 | } | |
f6705578 | 1868 | } |
a654b9d8 | 1869 | |
3c462c88 GR |
1870 | if (mddev_is_clustered(mddev)) |
1871 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1872 | ||
2699b672 N |
1873 | if (rdev->badblocks.count == 0) |
1874 | /* Nothing to do for bad blocks*/ ; | |
1875 | else if (sb->bblog_offset == 0) | |
1876 | /* Cannot record bad blocks on this device */ | |
1877 | md_error(mddev, rdev); | |
1878 | else { | |
1879 | struct badblocks *bb = &rdev->badblocks; | |
1880 | u64 *bbp = (u64 *)page_address(rdev->bb_page); | |
1881 | u64 *p = bb->page; | |
1882 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1883 | if (bb->changed) { | |
1884 | unsigned seq; | |
1885 | ||
1886 | retry: | |
1887 | seq = read_seqbegin(&bb->lock); | |
1888 | ||
1889 | memset(bbp, 0xff, PAGE_SIZE); | |
1890 | ||
1891 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1892 | u64 internal_bb = p[i]; |
2699b672 N |
1893 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1894 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1895 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1896 | } |
d0962936 | 1897 | bb->changed = 0; |
2699b672 N |
1898 | if (read_seqretry(&bb->lock, seq)) |
1899 | goto retry; | |
1900 | ||
1901 | bb->sector = (rdev->sb_start + | |
1902 | (int)le32_to_cpu(sb->bblog_offset)); | |
1903 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1904 | } |
1905 | } | |
1906 | ||
1da177e4 | 1907 | max_dev = 0; |
dafb20fa | 1908 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1909 | if (rdev2->desc_nr+1 > max_dev) |
1910 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1911 | |
70471daf N |
1912 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
1913 | int bmask; | |
a778b73f | 1914 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
1915 | rdev->sb_size = max_dev * 2 + 256; |
1916 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
1917 | if (rdev->sb_size & bmask) | |
1918 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
1919 | } else |
1920 | max_dev = le32_to_cpu(sb->max_dev); | |
1921 | ||
1da177e4 | 1922 | for (i=0; i<max_dev;i++) |
8df72024 | 1923 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 1924 | |
a97b7896 SL |
1925 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
1926 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 1927 | |
ea0213e0 | 1928 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
1929 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
1930 | sb->feature_map |= | |
1931 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
1932 | else | |
1933 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
1934 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
1935 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
1936 | } | |
1937 | ||
dafb20fa | 1938 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1939 | i = rdev2->desc_nr; |
b2d444d7 | 1940 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 1941 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 1942 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 1943 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 1944 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 1945 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 1946 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 1947 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 1948 | else |
c4d4c91b | 1949 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
1950 | } |
1951 | ||
1da177e4 LT |
1952 | sb->sb_csum = calc_sb_1_csum(sb); |
1953 | } | |
1954 | ||
0cd17fec | 1955 | static unsigned long long |
3cb03002 | 1956 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
1957 | { |
1958 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 1959 | sector_t max_sectors; |
58c0fed4 | 1960 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1961 | return 0; /* component must fit device */ |
c6563a8c N |
1962 | if (rdev->data_offset != rdev->new_data_offset) |
1963 | return 0; /* too confusing */ | |
0f420358 | 1964 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 1965 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 1966 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
1967 | max_sectors -= rdev->data_offset; |
1968 | if (!num_sectors || num_sectors > max_sectors) | |
1969 | num_sectors = max_sectors; | |
c3d9714e | 1970 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
1971 | /* minor version 0 with bitmap we can't move */ |
1972 | return 0; | |
1973 | } else { | |
1974 | /* minor version 0; superblock after data */ | |
0f420358 | 1975 | sector_t sb_start; |
77304d2a | 1976 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 1977 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 1978 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
1979 | if (!num_sectors || num_sectors > max_sectors) |
1980 | num_sectors = max_sectors; | |
0f420358 | 1981 | rdev->sb_start = sb_start; |
0cd17fec | 1982 | } |
65a06f06 | 1983 | sb = page_address(rdev->sb_page); |
15f4a5fd | 1984 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 1985 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 1986 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
1987 | do { |
1988 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
1989 | rdev->sb_page); | |
1990 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 1991 | return num_sectors; |
c6563a8c N |
1992 | |
1993 | } | |
1994 | ||
1995 | static int | |
1996 | super_1_allow_new_offset(struct md_rdev *rdev, | |
1997 | unsigned long long new_offset) | |
1998 | { | |
1999 | /* All necessary checks on new >= old have been done */ | |
2000 | struct bitmap *bitmap; | |
2001 | if (new_offset >= rdev->data_offset) | |
2002 | return 1; | |
2003 | ||
2004 | /* with 1.0 metadata, there is no metadata to tread on | |
2005 | * so we can always move back */ | |
2006 | if (rdev->mddev->minor_version == 0) | |
2007 | return 1; | |
2008 | ||
2009 | /* otherwise we must be sure not to step on | |
2010 | * any metadata, so stay: | |
2011 | * 36K beyond start of superblock | |
2012 | * beyond end of badblocks | |
2013 | * beyond write-intent bitmap | |
2014 | */ | |
2015 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2016 | return 0; | |
2017 | bitmap = rdev->mddev->bitmap; | |
2018 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2019 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2020 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2021 | return 0; |
2022 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2023 | return 0; | |
2024 | ||
2025 | return 1; | |
0cd17fec | 2026 | } |
1da177e4 | 2027 | |
75c96f85 | 2028 | static struct super_type super_types[] = { |
1da177e4 LT |
2029 | [0] = { |
2030 | .name = "0.90.0", | |
2031 | .owner = THIS_MODULE, | |
0cd17fec CW |
2032 | .load_super = super_90_load, |
2033 | .validate_super = super_90_validate, | |
2034 | .sync_super = super_90_sync, | |
2035 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2036 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2037 | }, |
2038 | [1] = { | |
2039 | .name = "md-1", | |
2040 | .owner = THIS_MODULE, | |
0cd17fec CW |
2041 | .load_super = super_1_load, |
2042 | .validate_super = super_1_validate, | |
2043 | .sync_super = super_1_sync, | |
2044 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2045 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2046 | }, |
2047 | }; | |
1da177e4 | 2048 | |
fd01b88c | 2049 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2050 | { |
2051 | if (mddev->sync_super) { | |
2052 | mddev->sync_super(mddev, rdev); | |
2053 | return; | |
2054 | } | |
2055 | ||
2056 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2057 | ||
2058 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2059 | } | |
2060 | ||
fd01b88c | 2061 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2062 | { |
3cb03002 | 2063 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2064 | |
4b80991c | 2065 | rcu_read_lock(); |
0b020e85 SL |
2066 | rdev_for_each_rcu(rdev, mddev1) { |
2067 | if (test_bit(Faulty, &rdev->flags) || | |
2068 | test_bit(Journal, &rdev->flags) || | |
2069 | rdev->raid_disk == -1) | |
2070 | continue; | |
2071 | rdev_for_each_rcu(rdev2, mddev2) { | |
2072 | if (test_bit(Faulty, &rdev2->flags) || | |
2073 | test_bit(Journal, &rdev2->flags) || | |
2074 | rdev2->raid_disk == -1) | |
2075 | continue; | |
7dd5e7c3 | 2076 | if (rdev->bdev->bd_contains == |
4b80991c N |
2077 | rdev2->bdev->bd_contains) { |
2078 | rcu_read_unlock(); | |
7dd5e7c3 | 2079 | return 1; |
4b80991c | 2080 | } |
0b020e85 SL |
2081 | } |
2082 | } | |
4b80991c | 2083 | rcu_read_unlock(); |
1da177e4 LT |
2084 | return 0; |
2085 | } | |
2086 | ||
2087 | static LIST_HEAD(pending_raid_disks); | |
2088 | ||
ac5e7113 AN |
2089 | /* |
2090 | * Try to register data integrity profile for an mddev | |
2091 | * | |
2092 | * This is called when an array is started and after a disk has been kicked | |
2093 | * from the array. It only succeeds if all working and active component devices | |
2094 | * are integrity capable with matching profiles. | |
2095 | */ | |
fd01b88c | 2096 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2097 | { |
3cb03002 | 2098 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2099 | |
2100 | if (list_empty(&mddev->disks)) | |
2101 | return 0; /* nothing to do */ | |
629acb6a JB |
2102 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2103 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2104 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2105 | /* skip spares and non-functional disks */ |
2106 | if (test_bit(Faulty, &rdev->flags)) | |
2107 | continue; | |
2108 | if (rdev->raid_disk < 0) | |
2109 | continue; | |
ac5e7113 AN |
2110 | if (!reference) { |
2111 | /* Use the first rdev as the reference */ | |
2112 | reference = rdev; | |
2113 | continue; | |
2114 | } | |
2115 | /* does this rdev's profile match the reference profile? */ | |
2116 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2117 | rdev->bdev->bd_disk) < 0) | |
2118 | return -EINVAL; | |
2119 | } | |
89078d57 MP |
2120 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2121 | return 0; | |
ac5e7113 AN |
2122 | /* |
2123 | * All component devices are integrity capable and have matching | |
2124 | * profiles, register the common profile for the md device. | |
2125 | */ | |
25520d55 MP |
2126 | blk_integrity_register(mddev->gendisk, |
2127 | bdev_get_integrity(reference->bdev)); | |
2128 | ||
9d48739e | 2129 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2130 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2131 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2132 | mdname(mddev)); |
2133 | return -EINVAL; | |
2134 | } | |
ac5e7113 AN |
2135 | return 0; |
2136 | } | |
2137 | EXPORT_SYMBOL(md_integrity_register); | |
2138 | ||
1501efad DW |
2139 | /* |
2140 | * Attempt to add an rdev, but only if it is consistent with the current | |
2141 | * integrity profile | |
2142 | */ | |
2143 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2144 | { |
2863b9eb | 2145 | struct blk_integrity *bi_mddev; |
1501efad | 2146 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2147 | |
2148 | if (!mddev->gendisk) | |
1501efad | 2149 | return 0; |
2863b9eb | 2150 | |
2863b9eb | 2151 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2152 | |
ac5e7113 | 2153 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2154 | return 0; |
2155 | ||
2156 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2157 | pr_err("%s: incompatible integrity profile for %s\n", |
2158 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2159 | return -ENXIO; |
2160 | } | |
2161 | ||
2162 | return 0; | |
3f9d99c1 | 2163 | } |
ac5e7113 | 2164 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2165 | |
f72ffdd6 | 2166 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2167 | { |
7dd5e7c3 | 2168 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2169 | struct kobject *ko; |
5e55e2f5 | 2170 | int err; |
1da177e4 | 2171 | |
11e2ede0 DW |
2172 | /* prevent duplicates */ |
2173 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2174 | return -EEXIST; | |
2175 | ||
97b20ef7 N |
2176 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2177 | mddev->pers) | |
2178 | return -EROFS; | |
2179 | ||
dd8ac336 | 2180 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2181 | if (!test_bit(Journal, &rdev->flags) && |
2182 | rdev->sectors && | |
2183 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2184 | if (mddev->pers) { |
2185 | /* Cannot change size, so fail | |
2186 | * If mddev->level <= 0, then we don't care | |
2187 | * about aligning sizes (e.g. linear) | |
2188 | */ | |
2189 | if (mddev->level > 0) | |
2190 | return -ENOSPC; | |
2191 | } else | |
dd8ac336 | 2192 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2193 | } |
1da177e4 LT |
2194 | |
2195 | /* Verify rdev->desc_nr is unique. | |
2196 | * If it is -1, assign a free number, else | |
2197 | * check number is not in use | |
2198 | */ | |
4878e9eb | 2199 | rcu_read_lock(); |
1da177e4 LT |
2200 | if (rdev->desc_nr < 0) { |
2201 | int choice = 0; | |
4878e9eb N |
2202 | if (mddev->pers) |
2203 | choice = mddev->raid_disks; | |
57d051dc | 2204 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2205 | choice++; |
2206 | rdev->desc_nr = choice; | |
2207 | } else { | |
57d051dc | 2208 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2209 | rcu_read_unlock(); |
1da177e4 | 2210 | return -EBUSY; |
4878e9eb | 2211 | } |
1da177e4 | 2212 | } |
4878e9eb | 2213 | rcu_read_unlock(); |
f6b6ec5c SL |
2214 | if (!test_bit(Journal, &rdev->flags) && |
2215 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2216 | pr_warn("md: %s: array is limited to %d devices\n", |
2217 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2218 | return -EBUSY; |
2219 | } | |
19133a42 | 2220 | bdevname(rdev->bdev,b); |
90a9befb | 2221 | strreplace(b, '/', '!'); |
649316b2 | 2222 | |
1da177e4 | 2223 | rdev->mddev = mddev; |
9d48739e | 2224 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2225 | |
b2d6db58 | 2226 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2227 | goto fail; |
86e6ffdd | 2228 | |
0762b8bd | 2229 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2230 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2231 | /* failure here is OK */; | |
2232 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2233 | |
4b80991c | 2234 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2235 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2236 | |
2237 | /* May as well allow recovery to be retried once */ | |
5389042f | 2238 | mddev->recovery_disabled++; |
3f9d99c1 | 2239 | |
1da177e4 | 2240 | return 0; |
5e55e2f5 N |
2241 | |
2242 | fail: | |
9d48739e N |
2243 | pr_warn("md: failed to register dev-%s for %s\n", |
2244 | b, mdname(mddev)); | |
5e55e2f5 | 2245 | return err; |
1da177e4 LT |
2246 | } |
2247 | ||
177a99b2 | 2248 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2249 | { |
3cb03002 | 2250 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2251 | kobject_del(&rdev->kobj); |
177a99b2 | 2252 | kobject_put(&rdev->kobj); |
5792a285 N |
2253 | } |
2254 | ||
f72ffdd6 | 2255 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2256 | { |
2257 | char b[BDEVNAME_SIZE]; | |
403df478 | 2258 | |
49731baa | 2259 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2260 | list_del_rcu(&rdev->same_set); |
9d48739e | 2261 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
1da177e4 | 2262 | rdev->mddev = NULL; |
86e6ffdd | 2263 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2264 | sysfs_put(rdev->sysfs_state); |
2265 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2266 | rdev->badblocks.count = 0; |
5792a285 | 2267 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2268 | * writing to 'remove' to "dev/state". We also need |
2269 | * to delay it due to rcu usage. | |
5792a285 | 2270 | */ |
4b80991c | 2271 | synchronize_rcu(); |
177a99b2 N |
2272 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2273 | kobject_get(&rdev->kobj); | |
e804ac78 | 2274 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2275 | } |
2276 | ||
2277 | /* | |
2278 | * prevent the device from being mounted, repartitioned or | |
2279 | * otherwise reused by a RAID array (or any other kernel | |
2280 | * subsystem), by bd_claiming the device. | |
2281 | */ | |
3cb03002 | 2282 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2283 | { |
2284 | int err = 0; | |
2285 | struct block_device *bdev; | |
2286 | char b[BDEVNAME_SIZE]; | |
2287 | ||
d4d77629 | 2288 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2289 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2290 | if (IS_ERR(bdev)) { |
9d48739e | 2291 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2292 | return PTR_ERR(bdev); |
2293 | } | |
1da177e4 LT |
2294 | rdev->bdev = bdev; |
2295 | return err; | |
2296 | } | |
2297 | ||
3cb03002 | 2298 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2299 | { |
2300 | struct block_device *bdev = rdev->bdev; | |
2301 | rdev->bdev = NULL; | |
e525fd89 | 2302 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2303 | } |
2304 | ||
2305 | void md_autodetect_dev(dev_t dev); | |
2306 | ||
f72ffdd6 | 2307 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2308 | { |
2309 | char b[BDEVNAME_SIZE]; | |
403df478 | 2310 | |
9d48739e | 2311 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2312 | md_rdev_clear(rdev); |
1da177e4 | 2313 | #ifndef MODULE |
d0fae18f N |
2314 | if (test_bit(AutoDetected, &rdev->flags)) |
2315 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2316 | #endif |
2317 | unlock_rdev(rdev); | |
86e6ffdd | 2318 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2319 | } |
2320 | ||
fb56dfef | 2321 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2322 | { |
2323 | unbind_rdev_from_array(rdev); | |
2324 | export_rdev(rdev); | |
2325 | } | |
fb56dfef | 2326 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2327 | |
fd01b88c | 2328 | static void export_array(struct mddev *mddev) |
1da177e4 | 2329 | { |
0638bb0e | 2330 | struct md_rdev *rdev; |
1da177e4 | 2331 | |
0638bb0e N |
2332 | while (!list_empty(&mddev->disks)) { |
2333 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2334 | same_set); | |
fb56dfef | 2335 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2336 | } |
1da177e4 LT |
2337 | mddev->raid_disks = 0; |
2338 | mddev->major_version = 0; | |
2339 | } | |
2340 | ||
6497709b N |
2341 | static bool set_in_sync(struct mddev *mddev) |
2342 | { | |
efa4b77b | 2343 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2344 | if (!mddev->in_sync) { |
2345 | mddev->sync_checkers++; | |
2346 | spin_unlock(&mddev->lock); | |
2347 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2348 | spin_lock(&mddev->lock); | |
2349 | if (!mddev->in_sync && | |
2350 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2351 | mddev->in_sync = 1; |
4ad23a97 N |
2352 | /* |
2353 | * Ensure ->in_sync is visible before we clear | |
2354 | * ->sync_checkers. | |
2355 | */ | |
55cc39f3 | 2356 | smp_mb(); |
6497709b N |
2357 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2358 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2359 | } | |
4ad23a97 N |
2360 | if (--mddev->sync_checkers == 0) |
2361 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2362 | } |
2363 | if (mddev->safemode == 1) | |
2364 | mddev->safemode = 0; | |
2365 | return mddev->in_sync; | |
2366 | } | |
2367 | ||
f72ffdd6 | 2368 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2369 | { |
42543769 N |
2370 | /* Update each superblock (in-memory image), but |
2371 | * if we are allowed to, skip spares which already | |
2372 | * have the right event counter, or have one earlier | |
2373 | * (which would mean they aren't being marked as dirty | |
2374 | * with the rest of the array) | |
2375 | */ | |
3cb03002 | 2376 | struct md_rdev *rdev; |
dafb20fa | 2377 | rdev_for_each(rdev, mddev) { |
42543769 N |
2378 | if (rdev->sb_events == mddev->events || |
2379 | (nospares && | |
2380 | rdev->raid_disk < 0 && | |
42543769 N |
2381 | rdev->sb_events+1 == mddev->events)) { |
2382 | /* Don't update this superblock */ | |
2383 | rdev->sb_loaded = 2; | |
2384 | } else { | |
076f968b | 2385 | sync_super(mddev, rdev); |
42543769 N |
2386 | rdev->sb_loaded = 1; |
2387 | } | |
1da177e4 LT |
2388 | } |
2389 | } | |
2390 | ||
2aa82191 GR |
2391 | static bool does_sb_need_changing(struct mddev *mddev) |
2392 | { | |
2393 | struct md_rdev *rdev; | |
2394 | struct mdp_superblock_1 *sb; | |
2395 | int role; | |
2396 | ||
2397 | /* Find a good rdev */ | |
2398 | rdev_for_each(rdev, mddev) | |
2399 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2400 | break; | |
2401 | ||
2402 | /* No good device found. */ | |
2403 | if (!rdev) | |
2404 | return false; | |
2405 | ||
2406 | sb = page_address(rdev->sb_page); | |
2407 | /* Check if a device has become faulty or a spare become active */ | |
2408 | rdev_for_each(rdev, mddev) { | |
2409 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2410 | /* Device activated? */ | |
2411 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2412 | !test_bit(Faulty, &rdev->flags)) | |
2413 | return true; | |
2414 | /* Device turned faulty? */ | |
2415 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2416 | return true; | |
2417 | } | |
2418 | ||
2419 | /* Check if any mddev parameters have changed */ | |
2420 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2421 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2422 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2423 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2424 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2425 | return true; | |
2426 | ||
2427 | return false; | |
2428 | } | |
2429 | ||
1aee41f6 | 2430 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2431 | { |
3cb03002 | 2432 | struct md_rdev *rdev; |
06d91a5f | 2433 | int sync_req; |
42543769 | 2434 | int nospares = 0; |
2699b672 | 2435 | int any_badblocks_changed = 0; |
23b63f9f | 2436 | int ret = -1; |
1da177e4 | 2437 | |
d87f064f N |
2438 | if (mddev->ro) { |
2439 | if (force_change) | |
2953079c | 2440 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2441 | return; |
2442 | } | |
2aa82191 | 2443 | |
2c97cf13 | 2444 | repeat: |
2aa82191 | 2445 | if (mddev_is_clustered(mddev)) { |
2953079c | 2446 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2447 | force_change = 1; |
2953079c | 2448 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2449 | nospares = 1; |
23b63f9f | 2450 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2451 | /* Has someone else has updated the sb */ |
2452 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2453 | if (ret == 0) |
2454 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2455 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2456 | BIT(MD_SB_CHANGE_DEVS) | | |
2457 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2458 | return; |
2459 | } | |
2460 | } | |
2c97cf13 | 2461 | |
db0505d3 N |
2462 | /* |
2463 | * First make sure individual recovery_offsets are correct | |
2464 | * curr_resync_completed can only be used during recovery. | |
2465 | * During reshape/resync it might use array-addresses rather | |
2466 | * that device addresses. | |
2467 | */ | |
dafb20fa | 2468 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2469 | if (rdev->raid_disk >= 0 && |
2470 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2471 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2472 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2473 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2474 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2475 | !test_bit(In_sync, &rdev->flags) && |
2476 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2477 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2478 | ||
f72ffdd6 | 2479 | } |
bd52b746 | 2480 | if (!mddev->persistent) { |
2953079c SL |
2481 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2482 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2483 | if (!mddev->external) { |
2953079c | 2484 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2485 | rdev_for_each(rdev, mddev) { |
de393cde | 2486 | if (rdev->badblocks.changed) { |
d0962936 | 2487 | rdev->badblocks.changed = 0; |
fc974ee2 | 2488 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2489 | md_error(mddev, rdev); |
2490 | } | |
2491 | clear_bit(Blocked, &rdev->flags); | |
2492 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2493 | wake_up(&rdev->blocked_wait); | |
2494 | } | |
2495 | } | |
3a3a5ddb N |
2496 | wake_up(&mddev->sb_wait); |
2497 | return; | |
2498 | } | |
2499 | ||
85572d7c | 2500 | spin_lock(&mddev->lock); |
84692195 | 2501 | |
9ebc6ef1 | 2502 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2503 | |
2953079c | 2504 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2505 | force_change = 1; |
2953079c | 2506 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2507 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2508 | * though if events isn't the right even/odd, we will have to do | |
2509 | * spares after all | |
2510 | */ | |
2511 | nospares = 1; | |
2512 | if (force_change) | |
2513 | nospares = 0; | |
2514 | if (mddev->degraded) | |
84692195 N |
2515 | /* If the array is degraded, then skipping spares is both |
2516 | * dangerous and fairly pointless. | |
2517 | * Dangerous because a device that was removed from the array | |
2518 | * might have a event_count that still looks up-to-date, | |
2519 | * so it can be re-added without a resync. | |
2520 | * Pointless because if there are any spares to skip, | |
2521 | * then a recovery will happen and soon that array won't | |
2522 | * be degraded any more and the spare can go back to sleep then. | |
2523 | */ | |
850b2b42 | 2524 | nospares = 0; |
84692195 | 2525 | |
06d91a5f | 2526 | sync_req = mddev->in_sync; |
42543769 N |
2527 | |
2528 | /* If this is just a dirty<->clean transition, and the array is clean | |
2529 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2530 | if (nospares |
42543769 | 2531 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2532 | && mddev->can_decrease_events |
2533 | && mddev->events != 1) { | |
42543769 | 2534 | mddev->events--; |
a8707c08 N |
2535 | mddev->can_decrease_events = 0; |
2536 | } else { | |
42543769 N |
2537 | /* otherwise we have to go forward and ... */ |
2538 | mddev->events ++; | |
a8707c08 | 2539 | mddev->can_decrease_events = nospares; |
42543769 | 2540 | } |
1da177e4 | 2541 | |
403df478 N |
2542 | /* |
2543 | * This 64-bit counter should never wrap. | |
2544 | * Either we are in around ~1 trillion A.C., assuming | |
2545 | * 1 reboot per second, or we have a bug... | |
2546 | */ | |
2547 | WARN_ON(mddev->events == 0); | |
2699b672 | 2548 | |
dafb20fa | 2549 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2550 | if (rdev->badblocks.changed) |
2551 | any_badblocks_changed++; | |
de393cde N |
2552 | if (test_bit(Faulty, &rdev->flags)) |
2553 | set_bit(FaultRecorded, &rdev->flags); | |
2554 | } | |
2699b672 | 2555 | |
e691063a | 2556 | sync_sbs(mddev, nospares); |
85572d7c | 2557 | spin_unlock(&mddev->lock); |
1da177e4 | 2558 | |
36a4e1fe N |
2559 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2560 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2561 | |
504634f6 SL |
2562 | if (mddev->queue) |
2563 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2564 | rewrite: |
e64e4018 | 2565 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2566 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2567 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2568 | |
42543769 N |
2569 | if (rdev->sb_loaded != 1) |
2570 | continue; /* no noise on spare devices */ | |
1da177e4 | 2571 | |
f466722c | 2572 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2573 | md_super_write(mddev,rdev, |
0f420358 | 2574 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2575 | rdev->sb_page); |
36a4e1fe N |
2576 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2577 | bdevname(rdev->bdev, b), | |
2578 | (unsigned long long)rdev->sb_start); | |
42543769 | 2579 | rdev->sb_events = mddev->events; |
2699b672 N |
2580 | if (rdev->badblocks.size) { |
2581 | md_super_write(mddev, rdev, | |
2582 | rdev->badblocks.sector, | |
2583 | rdev->badblocks.size << 9, | |
2584 | rdev->bb_page); | |
2585 | rdev->badblocks.size = 0; | |
2586 | } | |
7bfa19f2 | 2587 | |
f466722c | 2588 | } else |
36a4e1fe N |
2589 | pr_debug("md: %s (skipping faulty)\n", |
2590 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2591 | |
7bfa19f2 | 2592 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2593 | /* only need to write one superblock... */ |
2594 | break; | |
2595 | } | |
46533ff7 N |
2596 | if (md_super_wait(mddev) < 0) |
2597 | goto rewrite; | |
2953079c | 2598 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2599 | |
2c97cf13 GJ |
2600 | if (mddev_is_clustered(mddev) && ret == 0) |
2601 | md_cluster_ops->metadata_update_finish(mddev); | |
2602 | ||
850b2b42 | 2603 | if (mddev->in_sync != sync_req || |
2953079c SL |
2604 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2605 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2606 | /* have to write it out again */ |
06d91a5f | 2607 | goto repeat; |
3d310eb7 | 2608 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2609 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2610 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2611 | |
dafb20fa | 2612 | rdev_for_each(rdev, mddev) { |
de393cde N |
2613 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2614 | clear_bit(Blocked, &rdev->flags); | |
2615 | ||
2616 | if (any_badblocks_changed) | |
fc974ee2 | 2617 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2618 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2619 | wake_up(&rdev->blocked_wait); | |
2620 | } | |
1da177e4 | 2621 | } |
1aee41f6 | 2622 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2623 | |
a6da4ef8 GR |
2624 | static int add_bound_rdev(struct md_rdev *rdev) |
2625 | { | |
2626 | struct mddev *mddev = rdev->mddev; | |
2627 | int err = 0; | |
87d4d916 | 2628 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2629 | |
87d4d916 | 2630 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2631 | /* If there is hot_add_disk but no hot_remove_disk |
2632 | * then added disks for geometry changes, | |
2633 | * and should be added immediately. | |
2634 | */ | |
2635 | super_types[mddev->major_version]. | |
2636 | validate_super(mddev, rdev); | |
87d4d916 SL |
2637 | if (add_journal) |
2638 | mddev_suspend(mddev); | |
a6da4ef8 | 2639 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2640 | if (add_journal) |
2641 | mddev_resume(mddev); | |
a6da4ef8 | 2642 | if (err) { |
db767672 | 2643 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2644 | return err; |
2645 | } | |
2646 | } | |
2647 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2648 | ||
2953079c | 2649 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2650 | if (mddev->degraded) |
2651 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2652 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2653 | md_new_event(mddev); | |
2654 | md_wakeup_thread(mddev->thread); | |
2655 | return 0; | |
2656 | } | |
1da177e4 | 2657 | |
7f6ce769 | 2658 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2659 | * We want to accept with case. For this we use cmd_match. |
2660 | */ | |
2661 | static int cmd_match(const char *cmd, const char *str) | |
2662 | { | |
2663 | /* See if cmd, written into a sysfs file, matches | |
2664 | * str. They must either be the same, or cmd can | |
2665 | * have a trailing newline | |
2666 | */ | |
2667 | while (*cmd && *str && *cmd == *str) { | |
2668 | cmd++; | |
2669 | str++; | |
2670 | } | |
2671 | if (*cmd == '\n') | |
2672 | cmd++; | |
2673 | if (*str || *cmd) | |
2674 | return 0; | |
2675 | return 1; | |
2676 | } | |
2677 | ||
86e6ffdd N |
2678 | struct rdev_sysfs_entry { |
2679 | struct attribute attr; | |
3cb03002 N |
2680 | ssize_t (*show)(struct md_rdev *, char *); |
2681 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2682 | }; |
2683 | ||
2684 | static ssize_t | |
3cb03002 | 2685 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2686 | { |
35b785f7 | 2687 | char *sep = ","; |
20a49ff6 | 2688 | size_t len = 0; |
6aa7de05 | 2689 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2690 | |
758bfc8a | 2691 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2692 | (!test_bit(ExternalBbl, &flags) && |
2693 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2694 | len += sprintf(page+len, "faulty%s", sep); |
2695 | if (test_bit(In_sync, &flags)) | |
2696 | len += sprintf(page+len, "in_sync%s", sep); | |
2697 | if (test_bit(Journal, &flags)) | |
2698 | len += sprintf(page+len, "journal%s", sep); | |
2699 | if (test_bit(WriteMostly, &flags)) | |
2700 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2701 | if (test_bit(Blocked, &flags) || |
52c64152 | 2702 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2703 | && !test_bit(Faulty, &flags))) |
2704 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2705 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2706 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2707 | !test_bit(In_sync, &flags)) |
2708 | len += sprintf(page+len, "spare%s", sep); | |
2709 | if (test_bit(WriteErrorSeen, &flags)) | |
2710 | len += sprintf(page+len, "write_error%s", sep); | |
2711 | if (test_bit(WantReplacement, &flags)) | |
2712 | len += sprintf(page+len, "want_replacement%s", sep); | |
2713 | if (test_bit(Replacement, &flags)) | |
2714 | len += sprintf(page+len, "replacement%s", sep); | |
2715 | if (test_bit(ExternalBbl, &flags)) | |
2716 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2717 | if (test_bit(FailFast, &flags)) |
2718 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2719 | |
2720 | if (len) | |
2721 | len -= strlen(sep); | |
2d78f8c4 | 2722 | |
86e6ffdd N |
2723 | return len+sprintf(page+len, "\n"); |
2724 | } | |
2725 | ||
45dc2de1 | 2726 | static ssize_t |
3cb03002 | 2727 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2728 | { |
2729 | /* can write | |
de393cde | 2730 | * faulty - simulates an error |
45dc2de1 | 2731 | * remove - disconnects the device |
f655675b N |
2732 | * writemostly - sets write_mostly |
2733 | * -writemostly - clears write_mostly | |
de393cde N |
2734 | * blocked - sets the Blocked flags |
2735 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2736 | * insync - sets Insync providing device isn't active |
f466722c N |
2737 | * -insync - clear Insync for a device with a slot assigned, |
2738 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2739 | * write_error - sets WriteErrorSeen |
2740 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2741 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2742 | */ |
2743 | int err = -EINVAL; | |
2744 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2745 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2746 | if (test_bit(Faulty, &rdev->flags)) |
2747 | err = 0; | |
2748 | else | |
2749 | err = -EBUSY; | |
45dc2de1 | 2750 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2751 | if (rdev->mddev->pers) { |
2752 | clear_bit(Blocked, &rdev->flags); | |
2753 | remove_and_add_spares(rdev->mddev, rdev); | |
2754 | } | |
45dc2de1 N |
2755 | if (rdev->raid_disk >= 0) |
2756 | err = -EBUSY; | |
2757 | else { | |
fd01b88c | 2758 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2759 | err = 0; |
a9720903 GJ |
2760 | if (mddev_is_clustered(mddev)) |
2761 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2762 | ||
2763 | if (err == 0) { | |
2764 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2765 | if (mddev->pers) { |
2953079c | 2766 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2767 | md_wakeup_thread(mddev->thread); |
2768 | } | |
a9720903 GJ |
2769 | md_new_event(mddev); |
2770 | } | |
45dc2de1 | 2771 | } |
f655675b N |
2772 | } else if (cmd_match(buf, "writemostly")) { |
2773 | set_bit(WriteMostly, &rdev->flags); | |
2774 | err = 0; | |
2775 | } else if (cmd_match(buf, "-writemostly")) { | |
2776 | clear_bit(WriteMostly, &rdev->flags); | |
6bfe0b49 DW |
2777 | err = 0; |
2778 | } else if (cmd_match(buf, "blocked")) { | |
2779 | set_bit(Blocked, &rdev->flags); | |
2780 | err = 0; | |
2781 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2782 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2783 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2784 | rdev->badblocks.unacked_exist) { |
de393cde N |
2785 | /* metadata handler doesn't understand badblocks, |
2786 | * so we need to fail the device | |
2787 | */ | |
2788 | md_error(rdev->mddev, rdev); | |
2789 | } | |
6bfe0b49 | 2790 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2791 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2792 | wake_up(&rdev->blocked_wait); |
2793 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2794 | md_wakeup_thread(rdev->mddev->thread); | |
2795 | ||
6d56e278 N |
2796 | err = 0; |
2797 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2798 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2799 | err = 0; |
688834e6 N |
2800 | } else if (cmd_match(buf, "failfast")) { |
2801 | set_bit(FailFast, &rdev->flags); | |
2802 | err = 0; | |
2803 | } else if (cmd_match(buf, "-failfast")) { | |
2804 | clear_bit(FailFast, &rdev->flags); | |
2805 | err = 0; | |
f2076e7d SL |
2806 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2807 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2808 | if (rdev->mddev->pers == NULL) { |
2809 | clear_bit(In_sync, &rdev->flags); | |
2810 | rdev->saved_raid_disk = rdev->raid_disk; | |
2811 | rdev->raid_disk = -1; | |
2812 | err = 0; | |
2813 | } | |
d7a9d443 N |
2814 | } else if (cmd_match(buf, "write_error")) { |
2815 | set_bit(WriteErrorSeen, &rdev->flags); | |
2816 | err = 0; | |
2817 | } else if (cmd_match(buf, "-write_error")) { | |
2818 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2819 | err = 0; | |
2d78f8c4 N |
2820 | } else if (cmd_match(buf, "want_replacement")) { |
2821 | /* Any non-spare device that is not a replacement can | |
2822 | * become want_replacement at any time, but we then need to | |
2823 | * check if recovery is needed. | |
2824 | */ | |
2825 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2826 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2827 | !test_bit(Replacement, &rdev->flags)) |
2828 | set_bit(WantReplacement, &rdev->flags); | |
2829 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2830 | md_wakeup_thread(rdev->mddev->thread); | |
2831 | err = 0; | |
2832 | } else if (cmd_match(buf, "-want_replacement")) { | |
2833 | /* Clearing 'want_replacement' is always allowed. | |
2834 | * Once replacements starts it is too late though. | |
2835 | */ | |
2836 | err = 0; | |
2837 | clear_bit(WantReplacement, &rdev->flags); | |
2838 | } else if (cmd_match(buf, "replacement")) { | |
2839 | /* Can only set a device as a replacement when array has not | |
2840 | * yet been started. Once running, replacement is automatic | |
2841 | * from spares, or by assigning 'slot'. | |
2842 | */ | |
2843 | if (rdev->mddev->pers) | |
2844 | err = -EBUSY; | |
2845 | else { | |
2846 | set_bit(Replacement, &rdev->flags); | |
2847 | err = 0; | |
2848 | } | |
2849 | } else if (cmd_match(buf, "-replacement")) { | |
2850 | /* Similarly, can only clear Replacement before start */ | |
2851 | if (rdev->mddev->pers) | |
2852 | err = -EBUSY; | |
2853 | else { | |
2854 | clear_bit(Replacement, &rdev->flags); | |
2855 | err = 0; | |
2856 | } | |
a6da4ef8 | 2857 | } else if (cmd_match(buf, "re-add")) { |
011abdc9 N |
2858 | if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && |
2859 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
2860 | /* clear_bit is performed _after_ all the devices |
2861 | * have their local Faulty bit cleared. If any writes | |
2862 | * happen in the meantime in the local node, they | |
2863 | * will land in the local bitmap, which will be synced | |
2864 | * by this node eventually | |
2865 | */ | |
2866 | if (!mddev_is_clustered(rdev->mddev) || | |
2867 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2868 | clear_bit(Faulty, &rdev->flags); | |
2869 | err = add_bound_rdev(rdev); | |
2870 | } | |
a6da4ef8 GR |
2871 | } else |
2872 | err = -EBUSY; | |
35b785f7 TM |
2873 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2874 | set_bit(ExternalBbl, &rdev->flags); | |
2875 | rdev->badblocks.shift = 0; | |
2876 | err = 0; | |
2877 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
2878 | clear_bit(ExternalBbl, &rdev->flags); | |
2879 | err = 0; | |
45dc2de1 | 2880 | } |
00bcb4ac N |
2881 | if (!err) |
2882 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2883 | return err ? err : len; |
2884 | } | |
80ca3a44 | 2885 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2886 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2887 | |
4dbcdc75 | 2888 | static ssize_t |
3cb03002 | 2889 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2890 | { |
2891 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2892 | } | |
2893 | ||
2894 | static ssize_t | |
3cb03002 | 2895 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2896 | { |
4c9309c0 AD |
2897 | unsigned int n; |
2898 | int rv; | |
2899 | ||
2900 | rv = kstrtouint(buf, 10, &n); | |
2901 | if (rv < 0) | |
2902 | return rv; | |
2903 | atomic_set(&rdev->corrected_errors, n); | |
2904 | return len; | |
4dbcdc75 N |
2905 | } |
2906 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 2907 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 2908 | |
014236d2 | 2909 | static ssize_t |
3cb03002 | 2910 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 2911 | { |
f2076e7d SL |
2912 | if (test_bit(Journal, &rdev->flags)) |
2913 | return sprintf(page, "journal\n"); | |
2914 | else if (rdev->raid_disk < 0) | |
014236d2 N |
2915 | return sprintf(page, "none\n"); |
2916 | else | |
2917 | return sprintf(page, "%d\n", rdev->raid_disk); | |
2918 | } | |
2919 | ||
2920 | static ssize_t | |
3cb03002 | 2921 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 2922 | { |
4c9309c0 | 2923 | int slot; |
c303da6d | 2924 | int err; |
4c9309c0 | 2925 | |
f2076e7d SL |
2926 | if (test_bit(Journal, &rdev->flags)) |
2927 | return -EBUSY; | |
014236d2 N |
2928 | if (strncmp(buf, "none", 4)==0) |
2929 | slot = -1; | |
4c9309c0 AD |
2930 | else { |
2931 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
2932 | if (err < 0) | |
2933 | return err; | |
2934 | } | |
6c2fce2e | 2935 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
2936 | /* Setting 'slot' on an active array requires also |
2937 | * updating the 'rd%d' link, and communicating | |
2938 | * with the personality with ->hot_*_disk. | |
2939 | * For now we only support removing | |
2940 | * failed/spare devices. This normally happens automatically, | |
2941 | * but not when the metadata is externally managed. | |
2942 | */ | |
c303da6d N |
2943 | if (rdev->raid_disk == -1) |
2944 | return -EEXIST; | |
2945 | /* personality does all needed checks */ | |
01393f3d | 2946 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 2947 | return -EINVAL; |
746d3207 N |
2948 | clear_bit(Blocked, &rdev->flags); |
2949 | remove_and_add_spares(rdev->mddev, rdev); | |
2950 | if (rdev->raid_disk >= 0) | |
2951 | return -EBUSY; | |
c303da6d N |
2952 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
2953 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 2954 | } else if (rdev->mddev->pers) { |
6c2fce2e | 2955 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 2956 | * if we ever get bitmaps working here. |
6c2fce2e | 2957 | */ |
cb01c549 | 2958 | int err; |
6c2fce2e NB |
2959 | |
2960 | if (rdev->raid_disk != -1) | |
2961 | return -EBUSY; | |
2962 | ||
c6751b2b N |
2963 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
2964 | return -EBUSY; | |
2965 | ||
6c2fce2e NB |
2966 | if (rdev->mddev->pers->hot_add_disk == NULL) |
2967 | return -EINVAL; | |
2968 | ||
ba1b41b6 N |
2969 | if (slot >= rdev->mddev->raid_disks && |
2970 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
2971 | return -ENOSPC; | |
2972 | ||
6c2fce2e NB |
2973 | rdev->raid_disk = slot; |
2974 | if (test_bit(In_sync, &rdev->flags)) | |
2975 | rdev->saved_raid_disk = slot; | |
2976 | else | |
2977 | rdev->saved_raid_disk = -1; | |
d30519fc | 2978 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 2979 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
2980 | err = rdev->mddev->pers-> |
2981 | hot_add_disk(rdev->mddev, rdev); | |
2982 | if (err) { | |
2983 | rdev->raid_disk = -1; | |
2984 | return err; | |
2985 | } else | |
2986 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2987 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
2988 | /* failure here is OK */; | |
6c2fce2e | 2989 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 2990 | } else { |
ba1b41b6 N |
2991 | if (slot >= rdev->mddev->raid_disks && |
2992 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
2993 | return -ENOSPC; |
2994 | rdev->raid_disk = slot; | |
2995 | /* assume it is working */ | |
c5d79adb N |
2996 | clear_bit(Faulty, &rdev->flags); |
2997 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 2998 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 2999 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3000 | } |
014236d2 N |
3001 | return len; |
3002 | } | |
3003 | ||
014236d2 | 3004 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3005 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3006 | |
93c8cad0 | 3007 | static ssize_t |
3cb03002 | 3008 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3009 | { |
6961ece4 | 3010 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3011 | } |
3012 | ||
3013 | static ssize_t | |
3cb03002 | 3014 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3015 | { |
c6563a8c | 3016 | unsigned long long offset; |
b29bebd6 | 3017 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3018 | return -EINVAL; |
8ed0a521 | 3019 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3020 | return -EBUSY; |
dd8ac336 | 3021 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3022 | /* Must set offset before size, so overlap checks |
3023 | * can be sane */ | |
3024 | return -EBUSY; | |
93c8cad0 | 3025 | rdev->data_offset = offset; |
25f7fd47 | 3026 | rdev->new_data_offset = offset; |
93c8cad0 N |
3027 | return len; |
3028 | } | |
3029 | ||
3030 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3031 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3032 | |
c6563a8c N |
3033 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3034 | { | |
3035 | return sprintf(page, "%llu\n", | |
3036 | (unsigned long long)rdev->new_data_offset); | |
3037 | } | |
3038 | ||
3039 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3040 | const char *buf, size_t len) | |
3041 | { | |
3042 | unsigned long long new_offset; | |
3043 | struct mddev *mddev = rdev->mddev; | |
3044 | ||
b29bebd6 | 3045 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3046 | return -EINVAL; |
3047 | ||
f851b60d N |
3048 | if (mddev->sync_thread || |
3049 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3050 | return -EBUSY; |
3051 | if (new_offset == rdev->data_offset) | |
3052 | /* reset is always permitted */ | |
3053 | ; | |
3054 | else if (new_offset > rdev->data_offset) { | |
3055 | /* must not push array size beyond rdev_sectors */ | |
3056 | if (new_offset - rdev->data_offset | |
3057 | + mddev->dev_sectors > rdev->sectors) | |
3058 | return -E2BIG; | |
3059 | } | |
3060 | /* Metadata worries about other space details. */ | |
3061 | ||
3062 | /* decreasing the offset is inconsistent with a backwards | |
3063 | * reshape. | |
3064 | */ | |
3065 | if (new_offset < rdev->data_offset && | |
3066 | mddev->reshape_backwards) | |
3067 | return -EINVAL; | |
3068 | /* Increasing offset is inconsistent with forwards | |
3069 | * reshape. reshape_direction should be set to | |
3070 | * 'backwards' first. | |
3071 | */ | |
3072 | if (new_offset > rdev->data_offset && | |
3073 | !mddev->reshape_backwards) | |
3074 | return -EINVAL; | |
3075 | ||
3076 | if (mddev->pers && mddev->persistent && | |
3077 | !super_types[mddev->major_version] | |
3078 | .allow_new_offset(rdev, new_offset)) | |
3079 | return -E2BIG; | |
3080 | rdev->new_data_offset = new_offset; | |
3081 | if (new_offset > rdev->data_offset) | |
3082 | mddev->reshape_backwards = 1; | |
3083 | else if (new_offset < rdev->data_offset) | |
3084 | mddev->reshape_backwards = 0; | |
3085 | ||
3086 | return len; | |
3087 | } | |
3088 | static struct rdev_sysfs_entry rdev_new_offset = | |
3089 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3090 | ||
83303b61 | 3091 | static ssize_t |
3cb03002 | 3092 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3093 | { |
dd8ac336 | 3094 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3095 | } |
3096 | ||
c5d79adb N |
3097 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3098 | { | |
3099 | /* check if two start/length pairs overlap */ | |
3100 | if (s1+l1 <= s2) | |
3101 | return 0; | |
3102 | if (s2+l2 <= s1) | |
3103 | return 0; | |
3104 | return 1; | |
3105 | } | |
3106 | ||
b522adcd DW |
3107 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3108 | { | |
3109 | unsigned long long blocks; | |
3110 | sector_t new; | |
3111 | ||
b29bebd6 | 3112 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3113 | return -EINVAL; |
3114 | ||
3115 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3116 | return -EINVAL; /* sector conversion overflow */ | |
3117 | ||
3118 | new = blocks * 2; | |
3119 | if (new != blocks * 2) | |
3120 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3121 | ||
3122 | *sectors = new; | |
3123 | return 0; | |
3124 | } | |
3125 | ||
83303b61 | 3126 | static ssize_t |
3cb03002 | 3127 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3128 | { |
fd01b88c | 3129 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3130 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3131 | sector_t sectors; |
27c529bb | 3132 | |
f2076e7d SL |
3133 | if (test_bit(Journal, &rdev->flags)) |
3134 | return -EBUSY; | |
b522adcd | 3135 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3136 | return -EINVAL; |
c6563a8c N |
3137 | if (rdev->data_offset != rdev->new_data_offset) |
3138 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3139 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3140 | if (my_mddev->persistent) { |
dd8ac336 AN |
3141 | sectors = super_types[my_mddev->major_version]. |
3142 | rdev_size_change(rdev, sectors); | |
3143 | if (!sectors) | |
0cd17fec | 3144 | return -EBUSY; |
dd8ac336 | 3145 | } else if (!sectors) |
77304d2a | 3146 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3147 | rdev->data_offset; |
a6468539 N |
3148 | if (!my_mddev->pers->resize) |
3149 | /* Cannot change size for RAID0 or Linear etc */ | |
3150 | return -EINVAL; | |
0cd17fec | 3151 | } |
dd8ac336 | 3152 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3153 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3154 | |
dd8ac336 AN |
3155 | rdev->sectors = sectors; |
3156 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3157 | /* Need to check that all other rdevs with the same |
3158 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3159 | * the rdev lists safely. | |
3160 | * This check does not provide a hard guarantee, it | |
3161 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3162 | */ |
fd01b88c | 3163 | struct mddev *mddev; |
c5d79adb | 3164 | int overlap = 0; |
159ec1fc | 3165 | struct list_head *tmp; |
c5d79adb | 3166 | |
8b1afc3d | 3167 | rcu_read_lock(); |
29ac4aa3 | 3168 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3169 | struct md_rdev *rdev2; |
c5d79adb | 3170 | |
dafb20fa | 3171 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3172 | if (rdev->bdev == rdev2->bdev && |
3173 | rdev != rdev2 && | |
3174 | overlaps(rdev->data_offset, rdev->sectors, | |
3175 | rdev2->data_offset, | |
3176 | rdev2->sectors)) { | |
c5d79adb N |
3177 | overlap = 1; |
3178 | break; | |
3179 | } | |
c5d79adb N |
3180 | if (overlap) { |
3181 | mddev_put(mddev); | |
3182 | break; | |
3183 | } | |
3184 | } | |
8b1afc3d | 3185 | rcu_read_unlock(); |
c5d79adb N |
3186 | if (overlap) { |
3187 | /* Someone else could have slipped in a size | |
3188 | * change here, but doing so is just silly. | |
dd8ac336 | 3189 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3190 | * safe, and trust userspace not to race with |
3191 | * itself | |
3192 | */ | |
dd8ac336 | 3193 | rdev->sectors = oldsectors; |
c5d79adb N |
3194 | return -EBUSY; |
3195 | } | |
3196 | } | |
83303b61 N |
3197 | return len; |
3198 | } | |
3199 | ||
3200 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3201 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3202 | |
3cb03002 | 3203 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3204 | { |
3205 | unsigned long long recovery_start = rdev->recovery_offset; | |
3206 | ||
3207 | if (test_bit(In_sync, &rdev->flags) || | |
3208 | recovery_start == MaxSector) | |
3209 | return sprintf(page, "none\n"); | |
3210 | ||
3211 | return sprintf(page, "%llu\n", recovery_start); | |
3212 | } | |
3213 | ||
3cb03002 | 3214 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3215 | { |
3216 | unsigned long long recovery_start; | |
3217 | ||
3218 | if (cmd_match(buf, "none")) | |
3219 | recovery_start = MaxSector; | |
b29bebd6 | 3220 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3221 | return -EINVAL; |
3222 | ||
3223 | if (rdev->mddev->pers && | |
3224 | rdev->raid_disk >= 0) | |
3225 | return -EBUSY; | |
3226 | ||
3227 | rdev->recovery_offset = recovery_start; | |
3228 | if (recovery_start == MaxSector) | |
3229 | set_bit(In_sync, &rdev->flags); | |
3230 | else | |
3231 | clear_bit(In_sync, &rdev->flags); | |
3232 | return len; | |
3233 | } | |
3234 | ||
3235 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3236 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3237 | ||
fc974ee2 VV |
3238 | /* sysfs access to bad-blocks list. |
3239 | * We present two files. | |
3240 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3241 | * are recorded as bad. The list is truncated to fit within | |
3242 | * the one-page limit of sysfs. | |
3243 | * Writing "sector length" to this file adds an acknowledged | |
3244 | * bad block list. | |
3245 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3246 | * been acknowledged. Writing to this file adds bad blocks | |
3247 | * without acknowledging them. This is largely for testing. | |
3248 | */ | |
3cb03002 | 3249 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3250 | { |
3251 | return badblocks_show(&rdev->badblocks, page, 0); | |
3252 | } | |
3cb03002 | 3253 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3254 | { |
de393cde N |
3255 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3256 | /* Maybe that ack was all we needed */ | |
3257 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3258 | wake_up(&rdev->blocked_wait); | |
3259 | return rv; | |
16c791a5 N |
3260 | } |
3261 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3262 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3263 | ||
3cb03002 | 3264 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3265 | { |
3266 | return badblocks_show(&rdev->badblocks, page, 1); | |
3267 | } | |
3cb03002 | 3268 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3269 | { |
3270 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3271 | } | |
3272 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3273 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3274 | ||
664aed04 AP |
3275 | static ssize_t |
3276 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3277 | { | |
3278 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3279 | } | |
3280 | ||
3281 | static ssize_t | |
3282 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3283 | { | |
3284 | unsigned long long sector; | |
3285 | ||
3286 | if (kstrtoull(buf, 10, §or) < 0) | |
3287 | return -EINVAL; | |
3288 | if (sector != (sector_t)sector) | |
3289 | return -EINVAL; | |
3290 | ||
3291 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3292 | rdev->raid_disk >= 0) | |
3293 | return -EBUSY; | |
3294 | ||
3295 | if (rdev->mddev->persistent) { | |
3296 | if (rdev->mddev->major_version == 0) | |
3297 | return -EINVAL; | |
3298 | if ((sector > rdev->sb_start && | |
3299 | sector - rdev->sb_start > S16_MAX) || | |
3300 | (sector < rdev->sb_start && | |
3301 | rdev->sb_start - sector > -S16_MIN)) | |
3302 | return -EINVAL; | |
3303 | rdev->ppl.offset = sector - rdev->sb_start; | |
3304 | } else if (!rdev->mddev->external) { | |
3305 | return -EBUSY; | |
3306 | } | |
3307 | rdev->ppl.sector = sector; | |
3308 | return len; | |
3309 | } | |
3310 | ||
3311 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3312 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3313 | ||
3314 | static ssize_t | |
3315 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3316 | { | |
3317 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3318 | } | |
3319 | ||
3320 | static ssize_t | |
3321 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3322 | { | |
3323 | unsigned int size; | |
3324 | ||
3325 | if (kstrtouint(buf, 10, &size) < 0) | |
3326 | return -EINVAL; | |
3327 | ||
3328 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3329 | rdev->raid_disk >= 0) | |
3330 | return -EBUSY; | |
3331 | ||
3332 | if (rdev->mddev->persistent) { | |
3333 | if (rdev->mddev->major_version == 0) | |
3334 | return -EINVAL; | |
3335 | if (size > U16_MAX) | |
3336 | return -EINVAL; | |
3337 | } else if (!rdev->mddev->external) { | |
3338 | return -EBUSY; | |
3339 | } | |
3340 | rdev->ppl.size = size; | |
3341 | return len; | |
3342 | } | |
3343 | ||
3344 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3345 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3346 | ||
86e6ffdd N |
3347 | static struct attribute *rdev_default_attrs[] = { |
3348 | &rdev_state.attr, | |
4dbcdc75 | 3349 | &rdev_errors.attr, |
014236d2 | 3350 | &rdev_slot.attr, |
93c8cad0 | 3351 | &rdev_offset.attr, |
c6563a8c | 3352 | &rdev_new_offset.attr, |
83303b61 | 3353 | &rdev_size.attr, |
06e3c817 | 3354 | &rdev_recovery_start.attr, |
16c791a5 N |
3355 | &rdev_bad_blocks.attr, |
3356 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3357 | &rdev_ppl_sector.attr, |
3358 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3359 | NULL, |
3360 | }; | |
3361 | static ssize_t | |
3362 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3363 | { | |
3364 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3365 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3366 | |
3367 | if (!entry->show) | |
3368 | return -EIO; | |
758bfc8a N |
3369 | if (!rdev->mddev) |
3370 | return -EBUSY; | |
3371 | return entry->show(rdev, page); | |
86e6ffdd N |
3372 | } |
3373 | ||
3374 | static ssize_t | |
3375 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3376 | const char *page, size_t length) | |
3377 | { | |
3378 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3379 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3380 | ssize_t rv; |
fd01b88c | 3381 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3382 | |
3383 | if (!entry->store) | |
3384 | return -EIO; | |
67463acb N |
3385 | if (!capable(CAP_SYS_ADMIN)) |
3386 | return -EACCES; | |
27c529bb | 3387 | rv = mddev ? mddev_lock(mddev): -EBUSY; |
ca388059 | 3388 | if (!rv) { |
27c529bb N |
3389 | if (rdev->mddev == NULL) |
3390 | rv = -EBUSY; | |
3391 | else | |
3392 | rv = entry->store(rdev, page, length); | |
6a51830e | 3393 | mddev_unlock(mddev); |
ca388059 N |
3394 | } |
3395 | return rv; | |
86e6ffdd N |
3396 | } |
3397 | ||
3398 | static void rdev_free(struct kobject *ko) | |
3399 | { | |
3cb03002 | 3400 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3401 | kfree(rdev); |
3402 | } | |
52cf25d0 | 3403 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3404 | .show = rdev_attr_show, |
3405 | .store = rdev_attr_store, | |
3406 | }; | |
3407 | static struct kobj_type rdev_ktype = { | |
3408 | .release = rdev_free, | |
3409 | .sysfs_ops = &rdev_sysfs_ops, | |
3410 | .default_attrs = rdev_default_attrs, | |
3411 | }; | |
3412 | ||
3cb03002 | 3413 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3414 | { |
3415 | rdev->desc_nr = -1; | |
3416 | rdev->saved_raid_disk = -1; | |
3417 | rdev->raid_disk = -1; | |
3418 | rdev->flags = 0; | |
3419 | rdev->data_offset = 0; | |
c6563a8c | 3420 | rdev->new_data_offset = 0; |
e8bb9a83 | 3421 | rdev->sb_events = 0; |
0e3ef49e | 3422 | rdev->last_read_error = 0; |
2699b672 N |
3423 | rdev->sb_loaded = 0; |
3424 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3425 | atomic_set(&rdev->nr_pending, 0); |
3426 | atomic_set(&rdev->read_errors, 0); | |
3427 | atomic_set(&rdev->corrected_errors, 0); | |
3428 | ||
3429 | INIT_LIST_HEAD(&rdev->same_set); | |
3430 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3431 | |
3432 | /* Add space to store bad block list. | |
3433 | * This reserves the space even on arrays where it cannot | |
3434 | * be used - I wonder if that matters | |
3435 | */ | |
fc974ee2 | 3436 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3437 | } |
3438 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3439 | /* |
3440 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3441 | * | |
3442 | * mark the device faulty if: | |
3443 | * | |
3444 | * - the device is nonexistent (zero size) | |
3445 | * - the device has no valid superblock | |
3446 | * | |
3447 | * a faulty rdev _never_ has rdev->sb set. | |
3448 | */ | |
3cb03002 | 3449 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3450 | { |
3451 | char b[BDEVNAME_SIZE]; | |
3452 | int err; | |
3cb03002 | 3453 | struct md_rdev *rdev; |
1da177e4 LT |
3454 | sector_t size; |
3455 | ||
9ffae0cf | 3456 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3457 | if (!rdev) |
1da177e4 | 3458 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3459 | |
2230dfe4 N |
3460 | err = md_rdev_init(rdev); |
3461 | if (err) | |
3462 | goto abort_free; | |
3463 | err = alloc_disk_sb(rdev); | |
3464 | if (err) | |
1da177e4 LT |
3465 | goto abort_free; |
3466 | ||
c5d79adb | 3467 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3468 | if (err) |
3469 | goto abort_free; | |
3470 | ||
f9cb074b | 3471 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3472 | |
77304d2a | 3473 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3474 | if (!size) { |
9d48739e | 3475 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3476 | bdevname(rdev->bdev,b)); |
3477 | err = -EINVAL; | |
3478 | goto abort_free; | |
3479 | } | |
3480 | ||
3481 | if (super_format >= 0) { | |
3482 | err = super_types[super_format]. | |
3483 | load_super(rdev, NULL, super_minor); | |
3484 | if (err == -EINVAL) { | |
9d48739e | 3485 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3486 | bdevname(rdev->bdev,b), |
9d48739e | 3487 | super_format, super_minor); |
1da177e4 LT |
3488 | goto abort_free; |
3489 | } | |
3490 | if (err < 0) { | |
9d48739e | 3491 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3492 | bdevname(rdev->bdev,b)); |
3493 | goto abort_free; | |
3494 | } | |
3495 | } | |
6bfe0b49 | 3496 | |
1da177e4 LT |
3497 | return rdev; |
3498 | ||
3499 | abort_free: | |
2699b672 N |
3500 | if (rdev->bdev) |
3501 | unlock_rdev(rdev); | |
545c8795 | 3502 | md_rdev_clear(rdev); |
1da177e4 LT |
3503 | kfree(rdev); |
3504 | return ERR_PTR(err); | |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | * Check a full RAID array for plausibility | |
3509 | */ | |
3510 | ||
f72ffdd6 | 3511 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3512 | { |
3513 | int i; | |
3cb03002 | 3514 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3515 | char b[BDEVNAME_SIZE]; |
3516 | ||
3517 | freshest = NULL; | |
dafb20fa | 3518 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3519 | switch (super_types[mddev->major_version]. |
3520 | load_super(rdev, freshest, mddev->minor_version)) { | |
3521 | case 1: | |
3522 | freshest = rdev; | |
3523 | break; | |
3524 | case 0: | |
3525 | break; | |
3526 | default: | |
9d48739e | 3527 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3528 | bdevname(rdev->bdev,b)); |
fb56dfef | 3529 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3530 | } |
3531 | ||
1da177e4 LT |
3532 | super_types[mddev->major_version]. |
3533 | validate_super(mddev, freshest); | |
3534 | ||
3535 | i = 0; | |
dafb20fa | 3536 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3537 | if (mddev->max_disks && |
3538 | (rdev->desc_nr >= mddev->max_disks || | |
3539 | i > mddev->max_disks)) { | |
9d48739e N |
3540 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3541 | mdname(mddev), bdevname(rdev->bdev, b), | |
3542 | mddev->max_disks); | |
fb56dfef | 3543 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3544 | continue; |
3545 | } | |
1aee41f6 | 3546 | if (rdev != freshest) { |
1da177e4 LT |
3547 | if (super_types[mddev->major_version]. |
3548 | validate_super(mddev, rdev)) { | |
9d48739e | 3549 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3550 | bdevname(rdev->bdev,b)); |
fb56dfef | 3551 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3552 | continue; |
3553 | } | |
1aee41f6 | 3554 | } |
1da177e4 LT |
3555 | if (mddev->level == LEVEL_MULTIPATH) { |
3556 | rdev->desc_nr = i++; | |
3557 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3558 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3559 | } else if (rdev->raid_disk >= |
3560 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3561 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3562 | rdev->raid_disk = -1; |
3563 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3564 | } |
3565 | } | |
1da177e4 LT |
3566 | } |
3567 | ||
72e02075 N |
3568 | /* Read a fixed-point number. |
3569 | * Numbers in sysfs attributes should be in "standard" units where | |
3570 | * possible, so time should be in seconds. | |
f72ffdd6 | 3571 | * However we internally use a a much smaller unit such as |
72e02075 N |
3572 | * milliseconds or jiffies. |
3573 | * This function takes a decimal number with a possible fractional | |
3574 | * component, and produces an integer which is the result of | |
3575 | * multiplying that number by 10^'scale'. | |
3576 | * all without any floating-point arithmetic. | |
3577 | */ | |
3578 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3579 | { | |
3580 | unsigned long result = 0; | |
3581 | long decimals = -1; | |
3582 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3583 | if (*cp == '.') | |
3584 | decimals = 0; | |
3585 | else if (decimals < scale) { | |
3586 | unsigned int value; | |
3587 | value = *cp - '0'; | |
3588 | result = result * 10 + value; | |
3589 | if (decimals >= 0) | |
3590 | decimals++; | |
3591 | } | |
3592 | cp++; | |
3593 | } | |
3594 | if (*cp == '\n') | |
3595 | cp++; | |
3596 | if (*cp) | |
3597 | return -EINVAL; | |
3598 | if (decimals < 0) | |
3599 | decimals = 0; | |
3600 | while (decimals < scale) { | |
3601 | result *= 10; | |
3602 | decimals ++; | |
3603 | } | |
3604 | *res = result; | |
3605 | return 0; | |
3606 | } | |
3607 | ||
16f17b39 | 3608 | static ssize_t |
fd01b88c | 3609 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3610 | { |
3611 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3612 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3613 | } | |
3614 | static ssize_t | |
fd01b88c | 3615 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3616 | { |
16f17b39 | 3617 | unsigned long msec; |
97ce0a7f | 3618 | |
28c1b9fd | 3619 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3620 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3621 | return -EINVAL; |
3622 | } | |
3623 | ||
72e02075 | 3624 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3625 | return -EINVAL; |
16f17b39 N |
3626 | if (msec == 0) |
3627 | mddev->safemode_delay = 0; | |
3628 | else { | |
19052c0e | 3629 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3630 | unsigned long new_delay = (msec*HZ)/1000; |
3631 | ||
3632 | if (new_delay == 0) | |
3633 | new_delay = 1; | |
3634 | mddev->safemode_delay = new_delay; | |
3635 | if (new_delay < old_delay || old_delay == 0) | |
3636 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3637 | } |
3638 | return len; | |
3639 | } | |
3640 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3641 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3642 | |
eae1701f | 3643 | static ssize_t |
fd01b88c | 3644 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3645 | { |
36d091f4 N |
3646 | struct md_personality *p; |
3647 | int ret; | |
3648 | spin_lock(&mddev->lock); | |
3649 | p = mddev->pers; | |
d9d166c2 | 3650 | if (p) |
36d091f4 | 3651 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3652 | else if (mddev->clevel[0]) |
36d091f4 | 3653 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3654 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3655 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3656 | else |
36d091f4 N |
3657 | ret = 0; |
3658 | spin_unlock(&mddev->lock); | |
3659 | return ret; | |
eae1701f N |
3660 | } |
3661 | ||
d9d166c2 | 3662 | static ssize_t |
fd01b88c | 3663 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3664 | { |
f2859af6 | 3665 | char clevel[16]; |
6791875e N |
3666 | ssize_t rv; |
3667 | size_t slen = len; | |
db721d32 | 3668 | struct md_personality *pers, *oldpers; |
f2859af6 | 3669 | long level; |
db721d32 | 3670 | void *priv, *oldpriv; |
3cb03002 | 3671 | struct md_rdev *rdev; |
245f46c2 | 3672 | |
6791875e N |
3673 | if (slen == 0 || slen >= sizeof(clevel)) |
3674 | return -EINVAL; | |
3675 | ||
3676 | rv = mddev_lock(mddev); | |
3677 | if (rv) | |
3678 | return rv; | |
3679 | ||
245f46c2 | 3680 | if (mddev->pers == NULL) { |
6791875e N |
3681 | strncpy(mddev->clevel, buf, slen); |
3682 | if (mddev->clevel[slen-1] == '\n') | |
3683 | slen--; | |
3684 | mddev->clevel[slen] = 0; | |
245f46c2 | 3685 | mddev->level = LEVEL_NONE; |
6791875e N |
3686 | rv = len; |
3687 | goto out_unlock; | |
245f46c2 | 3688 | } |
6791875e | 3689 | rv = -EROFS; |
bd8839e0 | 3690 | if (mddev->ro) |
6791875e | 3691 | goto out_unlock; |
245f46c2 N |
3692 | |
3693 | /* request to change the personality. Need to ensure: | |
3694 | * - array is not engaged in resync/recovery/reshape | |
3695 | * - old personality can be suspended | |
3696 | * - new personality will access other array. | |
3697 | */ | |
3698 | ||
6791875e | 3699 | rv = -EBUSY; |
bb4f1e9d | 3700 | if (mddev->sync_thread || |
f851b60d | 3701 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3702 | mddev->reshape_position != MaxSector || |
3703 | mddev->sysfs_active) | |
6791875e | 3704 | goto out_unlock; |
245f46c2 | 3705 | |
6791875e | 3706 | rv = -EINVAL; |
245f46c2 | 3707 | if (!mddev->pers->quiesce) { |
9d48739e N |
3708 | pr_warn("md: %s: %s does not support online personality change\n", |
3709 | mdname(mddev), mddev->pers->name); | |
6791875e | 3710 | goto out_unlock; |
245f46c2 N |
3711 | } |
3712 | ||
3713 | /* Now find the new personality */ | |
6791875e N |
3714 | strncpy(clevel, buf, slen); |
3715 | if (clevel[slen-1] == '\n') | |
3716 | slen--; | |
3717 | clevel[slen] = 0; | |
b29bebd6 | 3718 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3719 | level = LEVEL_NONE; |
245f46c2 | 3720 | |
f2859af6 DW |
3721 | if (request_module("md-%s", clevel) != 0) |
3722 | request_module("md-level-%s", clevel); | |
245f46c2 | 3723 | spin_lock(&pers_lock); |
f2859af6 | 3724 | pers = find_pers(level, clevel); |
245f46c2 N |
3725 | if (!pers || !try_module_get(pers->owner)) { |
3726 | spin_unlock(&pers_lock); | |
9d48739e | 3727 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3728 | rv = -EINVAL; |
3729 | goto out_unlock; | |
245f46c2 N |
3730 | } |
3731 | spin_unlock(&pers_lock); | |
3732 | ||
3733 | if (pers == mddev->pers) { | |
3734 | /* Nothing to do! */ | |
3735 | module_put(pers->owner); | |
6791875e N |
3736 | rv = len; |
3737 | goto out_unlock; | |
245f46c2 N |
3738 | } |
3739 | if (!pers->takeover) { | |
3740 | module_put(pers->owner); | |
9d48739e N |
3741 | pr_warn("md: %s: %s does not support personality takeover\n", |
3742 | mdname(mddev), clevel); | |
6791875e N |
3743 | rv = -EINVAL; |
3744 | goto out_unlock; | |
245f46c2 N |
3745 | } |
3746 | ||
dafb20fa | 3747 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3748 | rdev->new_raid_disk = rdev->raid_disk; |
3749 | ||
245f46c2 N |
3750 | /* ->takeover must set new_* and/or delta_disks |
3751 | * if it succeeds, and may set them when it fails. | |
3752 | */ | |
3753 | priv = pers->takeover(mddev); | |
3754 | if (IS_ERR(priv)) { | |
3755 | mddev->new_level = mddev->level; | |
3756 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3757 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3758 | mddev->raid_disks -= mddev->delta_disks; |
3759 | mddev->delta_disks = 0; | |
2c810cdd | 3760 | mddev->reshape_backwards = 0; |
245f46c2 | 3761 | module_put(pers->owner); |
9d48739e N |
3762 | pr_warn("md: %s: %s would not accept array\n", |
3763 | mdname(mddev), clevel); | |
6791875e N |
3764 | rv = PTR_ERR(priv); |
3765 | goto out_unlock; | |
245f46c2 N |
3766 | } |
3767 | ||
3768 | /* Looks like we have a winner */ | |
3769 | mddev_suspend(mddev); | |
5aa61f42 | 3770 | mddev_detach(mddev); |
36d091f4 N |
3771 | |
3772 | spin_lock(&mddev->lock); | |
db721d32 N |
3773 | oldpers = mddev->pers; |
3774 | oldpriv = mddev->private; | |
3775 | mddev->pers = pers; | |
3776 | mddev->private = priv; | |
3777 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3778 | mddev->level = mddev->new_level; | |
3779 | mddev->layout = mddev->new_layout; | |
3780 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3781 | mddev->delta_disks = 0; | |
3782 | mddev->reshape_backwards = 0; | |
3783 | mddev->degraded = 0; | |
36d091f4 | 3784 | spin_unlock(&mddev->lock); |
db721d32 N |
3785 | |
3786 | if (oldpers->sync_request == NULL && | |
3787 | mddev->external) { | |
3788 | /* We are converting from a no-redundancy array | |
3789 | * to a redundancy array and metadata is managed | |
3790 | * externally so we need to be sure that writes | |
3791 | * won't block due to a need to transition | |
3792 | * clean->dirty | |
3793 | * until external management is started. | |
3794 | */ | |
3795 | mddev->in_sync = 0; | |
3796 | mddev->safemode_delay = 0; | |
3797 | mddev->safemode = 0; | |
3798 | } | |
f72ffdd6 | 3799 | |
db721d32 N |
3800 | oldpers->free(mddev, oldpriv); |
3801 | ||
3802 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3803 | pers->sync_request != NULL) { |
3804 | /* need to add the md_redundancy_group */ | |
3805 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3806 | pr_warn("md: cannot register extra attributes for %s\n", |
3807 | mdname(mddev)); | |
388975cc | 3808 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3809 | } |
db721d32 | 3810 | if (oldpers->sync_request != NULL && |
a64c876f N |
3811 | pers->sync_request == NULL) { |
3812 | /* need to remove the md_redundancy_group */ | |
3813 | if (mddev->to_remove == NULL) | |
3814 | mddev->to_remove = &md_redundancy_group; | |
3815 | } | |
3816 | ||
4cb9da7d AO |
3817 | module_put(oldpers->owner); |
3818 | ||
dafb20fa | 3819 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3820 | if (rdev->raid_disk < 0) |
3821 | continue; | |
bf2cb0da | 3822 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3823 | rdev->new_raid_disk = -1; |
3824 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3825 | continue; | |
36fad858 | 3826 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3827 | } |
dafb20fa | 3828 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3829 | if (rdev->raid_disk < 0) |
3830 | continue; | |
3831 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3832 | continue; | |
3833 | rdev->raid_disk = rdev->new_raid_disk; | |
3834 | if (rdev->raid_disk < 0) | |
3a981b03 | 3835 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3836 | else { |
36fad858 | 3837 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3838 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3839 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3840 | } |
e93f68a1 N |
3841 | } |
3842 | ||
db721d32 | 3843 | if (pers->sync_request == NULL) { |
9af204cf TM |
3844 | /* this is now an array without redundancy, so |
3845 | * it must always be in_sync | |
3846 | */ | |
3847 | mddev->in_sync = 1; | |
3848 | del_timer_sync(&mddev->safemode_timer); | |
3849 | } | |
02e5f5c0 | 3850 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3851 | pers->run(mddev); |
2953079c | 3852 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3853 | mddev_resume(mddev); |
830778a1 N |
3854 | if (!mddev->thread) |
3855 | md_update_sb(mddev, 1); | |
5cac7861 | 3856 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3857 | md_new_event(mddev); |
6791875e N |
3858 | rv = len; |
3859 | out_unlock: | |
3860 | mddev_unlock(mddev); | |
d9d166c2 N |
3861 | return rv; |
3862 | } | |
3863 | ||
3864 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3865 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3866 | |
d4dbd025 | 3867 | static ssize_t |
fd01b88c | 3868 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3869 | { |
3870 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3871 | if (mddev->reshape_position != MaxSector && |
3872 | mddev->layout != mddev->new_layout) | |
3873 | return sprintf(page, "%d (%d)\n", | |
3874 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3875 | return sprintf(page, "%d\n", mddev->layout); |
3876 | } | |
3877 | ||
3878 | static ssize_t | |
fd01b88c | 3879 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3880 | { |
4c9309c0 | 3881 | unsigned int n; |
6791875e | 3882 | int err; |
d4dbd025 | 3883 | |
4c9309c0 AD |
3884 | err = kstrtouint(buf, 10, &n); |
3885 | if (err < 0) | |
3886 | return err; | |
6791875e N |
3887 | err = mddev_lock(mddev); |
3888 | if (err) | |
3889 | return err; | |
d4dbd025 | 3890 | |
b3546035 | 3891 | if (mddev->pers) { |
50ac168a | 3892 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3893 | err = -EBUSY; |
3894 | else if (mddev->ro) | |
3895 | err = -EROFS; | |
3896 | else { | |
3897 | mddev->new_layout = n; | |
3898 | err = mddev->pers->check_reshape(mddev); | |
3899 | if (err) | |
3900 | mddev->new_layout = mddev->layout; | |
597a711b | 3901 | } |
b3546035 | 3902 | } else { |
08a02ecd | 3903 | mddev->new_layout = n; |
b3546035 N |
3904 | if (mddev->reshape_position == MaxSector) |
3905 | mddev->layout = n; | |
3906 | } | |
6791875e N |
3907 | mddev_unlock(mddev); |
3908 | return err ?: len; | |
d4dbd025 N |
3909 | } |
3910 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 3911 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 3912 | |
eae1701f | 3913 | static ssize_t |
fd01b88c | 3914 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 3915 | { |
bb636547 N |
3916 | if (mddev->raid_disks == 0) |
3917 | return 0; | |
08a02ecd N |
3918 | if (mddev->reshape_position != MaxSector && |
3919 | mddev->delta_disks != 0) | |
3920 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
3921 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
3922 | return sprintf(page, "%d\n", mddev->raid_disks); |
3923 | } | |
3924 | ||
fd01b88c | 3925 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
3926 | |
3927 | static ssize_t | |
fd01b88c | 3928 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 3929 | { |
4c9309c0 | 3930 | unsigned int n; |
6791875e | 3931 | int err; |
da943b99 | 3932 | |
4c9309c0 AD |
3933 | err = kstrtouint(buf, 10, &n); |
3934 | if (err < 0) | |
3935 | return err; | |
da943b99 | 3936 | |
6791875e N |
3937 | err = mddev_lock(mddev); |
3938 | if (err) | |
3939 | return err; | |
da943b99 | 3940 | if (mddev->pers) |
6791875e | 3941 | err = update_raid_disks(mddev, n); |
08a02ecd | 3942 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 3943 | struct md_rdev *rdev; |
08a02ecd | 3944 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 3945 | |
6791875e | 3946 | err = -EINVAL; |
c6563a8c N |
3947 | rdev_for_each(rdev, mddev) { |
3948 | if (olddisks < n && | |
3949 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 3950 | goto out_unlock; |
c6563a8c N |
3951 | if (olddisks > n && |
3952 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 3953 | goto out_unlock; |
c6563a8c | 3954 | } |
6791875e | 3955 | err = 0; |
08a02ecd N |
3956 | mddev->delta_disks = n - olddisks; |
3957 | mddev->raid_disks = n; | |
2c810cdd | 3958 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 3959 | } else |
da943b99 | 3960 | mddev->raid_disks = n; |
6791875e N |
3961 | out_unlock: |
3962 | mddev_unlock(mddev); | |
3963 | return err ? err : len; | |
da943b99 N |
3964 | } |
3965 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 3966 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 3967 | |
3b34380a | 3968 | static ssize_t |
fd01b88c | 3969 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 3970 | { |
08a02ecd | 3971 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
3972 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
3973 | return sprintf(page, "%d (%d)\n", | |
3974 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
3975 | mddev->chunk_sectors << 9); |
3976 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
3977 | } |
3978 | ||
3979 | static ssize_t | |
fd01b88c | 3980 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 3981 | { |
4c9309c0 | 3982 | unsigned long n; |
6791875e | 3983 | int err; |
3b34380a | 3984 | |
4c9309c0 AD |
3985 | err = kstrtoul(buf, 10, &n); |
3986 | if (err < 0) | |
3987 | return err; | |
3b34380a | 3988 | |
6791875e N |
3989 | err = mddev_lock(mddev); |
3990 | if (err) | |
3991 | return err; | |
b3546035 | 3992 | if (mddev->pers) { |
50ac168a | 3993 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3994 | err = -EBUSY; |
3995 | else if (mddev->ro) | |
3996 | err = -EROFS; | |
3997 | else { | |
3998 | mddev->new_chunk_sectors = n >> 9; | |
3999 | err = mddev->pers->check_reshape(mddev); | |
4000 | if (err) | |
4001 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4002 | } |
b3546035 | 4003 | } else { |
664e7c41 | 4004 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4005 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4006 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4007 | } |
6791875e N |
4008 | mddev_unlock(mddev); |
4009 | return err ?: len; | |
3b34380a N |
4010 | } |
4011 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4012 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4013 | |
a94213b1 | 4014 | static ssize_t |
fd01b88c | 4015 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4016 | { |
d1a7c503 N |
4017 | if (mddev->recovery_cp == MaxSector) |
4018 | return sprintf(page, "none\n"); | |
a94213b1 N |
4019 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4020 | } | |
4021 | ||
4022 | static ssize_t | |
fd01b88c | 4023 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4024 | { |
4c9309c0 | 4025 | unsigned long long n; |
6791875e | 4026 | int err; |
4c9309c0 AD |
4027 | |
4028 | if (cmd_match(buf, "none")) | |
4029 | n = MaxSector; | |
4030 | else { | |
4031 | err = kstrtoull(buf, 10, &n); | |
4032 | if (err < 0) | |
4033 | return err; | |
4034 | if (n != (sector_t)n) | |
4035 | return -EINVAL; | |
4036 | } | |
a94213b1 | 4037 | |
6791875e N |
4038 | err = mddev_lock(mddev); |
4039 | if (err) | |
4040 | return err; | |
b098636c | 4041 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4042 | err = -EBUSY; |
a94213b1 | 4043 | |
6791875e N |
4044 | if (!err) { |
4045 | mddev->recovery_cp = n; | |
4046 | if (mddev->pers) | |
2953079c | 4047 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4048 | } |
4049 | mddev_unlock(mddev); | |
4050 | return err ?: len; | |
a94213b1 N |
4051 | } |
4052 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4053 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4054 | resync_start_show, resync_start_store); | |
a94213b1 | 4055 | |
9e653b63 N |
4056 | /* |
4057 | * The array state can be: | |
4058 | * | |
4059 | * clear | |
4060 | * No devices, no size, no level | |
4061 | * Equivalent to STOP_ARRAY ioctl | |
4062 | * inactive | |
4063 | * May have some settings, but array is not active | |
4064 | * all IO results in error | |
4065 | * When written, doesn't tear down array, but just stops it | |
4066 | * suspended (not supported yet) | |
4067 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4068 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4069 | * readonly |
4070 | * no resync can happen. no superblocks get written. | |
4071 | * write requests fail | |
4072 | * read-auto | |
4073 | * like readonly, but behaves like 'clean' on a write request. | |
4074 | * | |
4075 | * clean - no pending writes, but otherwise active. | |
4076 | * When written to inactive array, starts without resync | |
4077 | * If a write request arrives then | |
4078 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4079 | * if not known, block and switch to write-pending | |
4080 | * If written to an active array that has pending writes, then fails. | |
4081 | * active | |
4082 | * fully active: IO and resync can be happening. | |
4083 | * When written to inactive array, starts with resync | |
4084 | * | |
4085 | * write-pending | |
4086 | * clean, but writes are blocked waiting for 'active' to be written. | |
4087 | * | |
4088 | * active-idle | |
4089 | * like active, but no writes have been seen for a while (100msec). | |
4090 | * | |
4091 | */ | |
4092 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
4093 | write_pending, active_idle, bad_word}; | |
05381954 | 4094 | static char *array_states[] = { |
9e653b63 N |
4095 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
4096 | "write-pending", "active-idle", NULL }; | |
4097 | ||
4098 | static int match_word(const char *word, char **list) | |
4099 | { | |
4100 | int n; | |
4101 | for (n=0; list[n]; n++) | |
4102 | if (cmd_match(word, list[n])) | |
4103 | break; | |
4104 | return n; | |
4105 | } | |
4106 | ||
4107 | static ssize_t | |
fd01b88c | 4108 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4109 | { |
4110 | enum array_state st = inactive; | |
4111 | ||
4112 | if (mddev->pers) | |
4113 | switch(mddev->ro) { | |
4114 | case 1: | |
4115 | st = readonly; | |
4116 | break; | |
4117 | case 2: | |
4118 | st = read_auto; | |
4119 | break; | |
4120 | case 0: | |
55cc39f3 | 4121 | spin_lock(&mddev->lock); |
2953079c | 4122 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4123 | st = write_pending; |
16f88949 TM |
4124 | else if (mddev->in_sync) |
4125 | st = clean; | |
9e653b63 N |
4126 | else if (mddev->safemode) |
4127 | st = active_idle; | |
4128 | else | |
4129 | st = active; | |
55cc39f3 | 4130 | spin_unlock(&mddev->lock); |
9e653b63 N |
4131 | } |
4132 | else { | |
4133 | if (list_empty(&mddev->disks) && | |
4134 | mddev->raid_disks == 0 && | |
58c0fed4 | 4135 | mddev->dev_sectors == 0) |
9e653b63 N |
4136 | st = clear; |
4137 | else | |
4138 | st = inactive; | |
4139 | } | |
4140 | return sprintf(page, "%s\n", array_states[st]); | |
4141 | } | |
4142 | ||
f72ffdd6 N |
4143 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4144 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4145 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4146 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4147 | |
4148 | static ssize_t | |
fd01b88c | 4149 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4150 | { |
6497709b | 4151 | int err = 0; |
9e653b63 | 4152 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4153 | |
4154 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4155 | /* don't take reconfig_mutex when toggling between | |
4156 | * clean and active | |
4157 | */ | |
4158 | spin_lock(&mddev->lock); | |
4159 | if (st == active) { | |
4160 | restart_array(mddev); | |
2953079c | 4161 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4162 | md_wakeup_thread(mddev->thread); |
6791875e | 4163 | wake_up(&mddev->sb_wait); |
6791875e N |
4164 | } else /* st == clean */ { |
4165 | restart_array(mddev); | |
6497709b | 4166 | if (!set_in_sync(mddev)) |
6791875e N |
4167 | err = -EBUSY; |
4168 | } | |
573275b5 TM |
4169 | if (!err) |
4170 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4171 | spin_unlock(&mddev->lock); |
c008f1d3 | 4172 | return err ?: len; |
6791875e N |
4173 | } |
4174 | err = mddev_lock(mddev); | |
4175 | if (err) | |
4176 | return err; | |
4177 | err = -EINVAL; | |
9e653b63 N |
4178 | switch(st) { |
4179 | case bad_word: | |
4180 | break; | |
4181 | case clear: | |
4182 | /* stopping an active array */ | |
a05b7ea0 | 4183 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4184 | break; |
4185 | case inactive: | |
4186 | /* stopping an active array */ | |
90cf195d | 4187 | if (mddev->pers) |
a05b7ea0 | 4188 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4189 | else |
e691063a | 4190 | err = 0; /* already inactive */ |
9e653b63 N |
4191 | break; |
4192 | case suspended: | |
4193 | break; /* not supported yet */ | |
4194 | case readonly: | |
4195 | if (mddev->pers) | |
a05b7ea0 | 4196 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4197 | else { |
4198 | mddev->ro = 1; | |
648b629e | 4199 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4200 | err = do_md_run(mddev); |
4201 | } | |
4202 | break; | |
4203 | case read_auto: | |
9e653b63 | 4204 | if (mddev->pers) { |
80268ee9 | 4205 | if (mddev->ro == 0) |
a05b7ea0 | 4206 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4207 | else if (mddev->ro == 1) |
648b629e N |
4208 | err = restart_array(mddev); |
4209 | if (err == 0) { | |
4210 | mddev->ro = 2; | |
4211 | set_disk_ro(mddev->gendisk, 0); | |
4212 | } | |
9e653b63 N |
4213 | } else { |
4214 | mddev->ro = 2; | |
4215 | err = do_md_run(mddev); | |
4216 | } | |
4217 | break; | |
4218 | case clean: | |
4219 | if (mddev->pers) { | |
339421de SL |
4220 | err = restart_array(mddev); |
4221 | if (err) | |
4222 | break; | |
85572d7c | 4223 | spin_lock(&mddev->lock); |
6497709b | 4224 | if (!set_in_sync(mddev)) |
e691063a | 4225 | err = -EBUSY; |
85572d7c | 4226 | spin_unlock(&mddev->lock); |
5bf29597 N |
4227 | } else |
4228 | err = -EINVAL; | |
9e653b63 N |
4229 | break; |
4230 | case active: | |
4231 | if (mddev->pers) { | |
339421de SL |
4232 | err = restart_array(mddev); |
4233 | if (err) | |
4234 | break; | |
2953079c | 4235 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4236 | wake_up(&mddev->sb_wait); |
4237 | err = 0; | |
4238 | } else { | |
4239 | mddev->ro = 0; | |
648b629e | 4240 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4241 | err = do_md_run(mddev); |
4242 | } | |
4243 | break; | |
4244 | case write_pending: | |
4245 | case active_idle: | |
4246 | /* these cannot be set */ | |
4247 | break; | |
4248 | } | |
6791875e N |
4249 | |
4250 | if (!err) { | |
1d23f178 N |
4251 | if (mddev->hold_active == UNTIL_IOCTL) |
4252 | mddev->hold_active = 0; | |
00bcb4ac | 4253 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4254 | } |
6791875e N |
4255 | mddev_unlock(mddev); |
4256 | return err ?: len; | |
9e653b63 | 4257 | } |
80ca3a44 | 4258 | static struct md_sysfs_entry md_array_state = |
750f199e | 4259 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4260 | |
1e50915f | 4261 | static ssize_t |
fd01b88c | 4262 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4263 | return sprintf(page, "%d\n", |
4264 | atomic_read(&mddev->max_corr_read_errors)); | |
4265 | } | |
4266 | ||
4267 | static ssize_t | |
fd01b88c | 4268 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4269 | { |
4c9309c0 AD |
4270 | unsigned int n; |
4271 | int rv; | |
1e50915f | 4272 | |
4c9309c0 AD |
4273 | rv = kstrtouint(buf, 10, &n); |
4274 | if (rv < 0) | |
4275 | return rv; | |
4276 | atomic_set(&mddev->max_corr_read_errors, n); | |
4277 | return len; | |
1e50915f RB |
4278 | } |
4279 | ||
4280 | static struct md_sysfs_entry max_corr_read_errors = | |
4281 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4282 | max_corrected_read_errors_store); | |
4283 | ||
6d7ff738 | 4284 | static ssize_t |
fd01b88c | 4285 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4286 | { |
4287 | return -EINVAL; | |
4288 | } | |
4289 | ||
4290 | static ssize_t | |
fd01b88c | 4291 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4292 | { |
4293 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4294 | /* The new device is added to the array. | |
4295 | * If the array has a persistent superblock, we read the | |
4296 | * superblock to initialise info and check validity. | |
4297 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4298 | * which mainly checks size. | |
4299 | */ | |
4300 | char *e; | |
4301 | int major = simple_strtoul(buf, &e, 10); | |
4302 | int minor; | |
4303 | dev_t dev; | |
3cb03002 | 4304 | struct md_rdev *rdev; |
6d7ff738 N |
4305 | int err; |
4306 | ||
4307 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4308 | return -EINVAL; | |
4309 | minor = simple_strtoul(e+1, &e, 10); | |
4310 | if (*e && *e != '\n') | |
4311 | return -EINVAL; | |
4312 | dev = MKDEV(major, minor); | |
4313 | if (major != MAJOR(dev) || | |
4314 | minor != MINOR(dev)) | |
4315 | return -EOVERFLOW; | |
4316 | ||
6791875e N |
4317 | flush_workqueue(md_misc_wq); |
4318 | ||
4319 | err = mddev_lock(mddev); | |
4320 | if (err) | |
4321 | return err; | |
6d7ff738 N |
4322 | if (mddev->persistent) { |
4323 | rdev = md_import_device(dev, mddev->major_version, | |
4324 | mddev->minor_version); | |
4325 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4326 | struct md_rdev *rdev0 |
4327 | = list_entry(mddev->disks.next, | |
4328 | struct md_rdev, same_set); | |
6d7ff738 N |
4329 | err = super_types[mddev->major_version] |
4330 | .load_super(rdev, rdev0, mddev->minor_version); | |
4331 | if (err < 0) | |
4332 | goto out; | |
4333 | } | |
c5d79adb N |
4334 | } else if (mddev->external) |
4335 | rdev = md_import_device(dev, -2, -1); | |
4336 | else | |
6d7ff738 N |
4337 | rdev = md_import_device(dev, -1, -1); |
4338 | ||
9a8c0fa8 N |
4339 | if (IS_ERR(rdev)) { |
4340 | mddev_unlock(mddev); | |
6d7ff738 | 4341 | return PTR_ERR(rdev); |
9a8c0fa8 | 4342 | } |
6d7ff738 N |
4343 | err = bind_rdev_to_array(rdev, mddev); |
4344 | out: | |
4345 | if (err) | |
4346 | export_rdev(rdev); | |
6791875e | 4347 | mddev_unlock(mddev); |
5492c46e AO |
4348 | if (!err) |
4349 | md_new_event(mddev); | |
6d7ff738 N |
4350 | return err ? err : len; |
4351 | } | |
4352 | ||
4353 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4354 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4355 | |
9b1d1dac | 4356 | static ssize_t |
fd01b88c | 4357 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4358 | { |
4359 | char *end; | |
4360 | unsigned long chunk, end_chunk; | |
6791875e | 4361 | int err; |
9b1d1dac | 4362 | |
6791875e N |
4363 | err = mddev_lock(mddev); |
4364 | if (err) | |
4365 | return err; | |
9b1d1dac PC |
4366 | if (!mddev->bitmap) |
4367 | goto out; | |
4368 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4369 | while (*buf) { | |
4370 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4371 | if (buf == end) break; | |
4372 | if (*end == '-') { /* range */ | |
4373 | buf = end + 1; | |
4374 | end_chunk = simple_strtoul(buf, &end, 0); | |
4375 | if (buf == end) break; | |
4376 | } | |
4377 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4378 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4379 | buf = skip_spaces(end); |
9b1d1dac | 4380 | } |
e64e4018 | 4381 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4382 | out: |
6791875e | 4383 | mddev_unlock(mddev); |
9b1d1dac PC |
4384 | return len; |
4385 | } | |
4386 | ||
4387 | static struct md_sysfs_entry md_bitmap = | |
4388 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4389 | ||
a35b0d69 | 4390 | static ssize_t |
fd01b88c | 4391 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4392 | { |
58c0fed4 AN |
4393 | return sprintf(page, "%llu\n", |
4394 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4395 | } |
4396 | ||
fd01b88c | 4397 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4398 | |
4399 | static ssize_t | |
fd01b88c | 4400 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4401 | { |
4402 | /* If array is inactive, we can reduce the component size, but | |
4403 | * not increase it (except from 0). | |
4404 | * If array is active, we can try an on-line resize | |
4405 | */ | |
b522adcd DW |
4406 | sector_t sectors; |
4407 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4408 | |
58c0fed4 AN |
4409 | if (err < 0) |
4410 | return err; | |
6791875e N |
4411 | err = mddev_lock(mddev); |
4412 | if (err) | |
4413 | return err; | |
a35b0d69 | 4414 | if (mddev->pers) { |
58c0fed4 | 4415 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4416 | if (err == 0) |
4417 | md_update_sb(mddev, 1); | |
a35b0d69 | 4418 | } else { |
58c0fed4 AN |
4419 | if (mddev->dev_sectors == 0 || |
4420 | mddev->dev_sectors > sectors) | |
4421 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4422 | else |
4423 | err = -ENOSPC; | |
4424 | } | |
6791875e | 4425 | mddev_unlock(mddev); |
a35b0d69 N |
4426 | return err ? err : len; |
4427 | } | |
4428 | ||
4429 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4430 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4431 | |
83f0d77a | 4432 | /* Metadata version. |
e691063a N |
4433 | * This is one of |
4434 | * 'none' for arrays with no metadata (good luck...) | |
4435 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4436 | * or N.M for internally known formats |
4437 | */ | |
4438 | static ssize_t | |
fd01b88c | 4439 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4440 | { |
4441 | if (mddev->persistent) | |
4442 | return sprintf(page, "%d.%d\n", | |
4443 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4444 | else if (mddev->external) |
4445 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4446 | else |
4447 | return sprintf(page, "none\n"); | |
4448 | } | |
4449 | ||
4450 | static ssize_t | |
fd01b88c | 4451 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4452 | { |
4453 | int major, minor; | |
4454 | char *e; | |
6791875e | 4455 | int err; |
ea43ddd8 N |
4456 | /* Changing the details of 'external' metadata is |
4457 | * always permitted. Otherwise there must be | |
4458 | * no devices attached to the array. | |
4459 | */ | |
6791875e N |
4460 | |
4461 | err = mddev_lock(mddev); | |
4462 | if (err) | |
4463 | return err; | |
4464 | err = -EBUSY; | |
ea43ddd8 N |
4465 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4466 | ; | |
4467 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4468 | goto out_unlock; |
8bb93aac | 4469 | |
6791875e | 4470 | err = 0; |
8bb93aac N |
4471 | if (cmd_match(buf, "none")) { |
4472 | mddev->persistent = 0; | |
e691063a N |
4473 | mddev->external = 0; |
4474 | mddev->major_version = 0; | |
4475 | mddev->minor_version = 90; | |
6791875e | 4476 | goto out_unlock; |
e691063a N |
4477 | } |
4478 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4479 | size_t namelen = len-9; |
e691063a N |
4480 | if (namelen >= sizeof(mddev->metadata_type)) |
4481 | namelen = sizeof(mddev->metadata_type)-1; | |
4482 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4483 | mddev->metadata_type[namelen] = 0; | |
4484 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4485 | mddev->metadata_type[--namelen] = 0; | |
4486 | mddev->persistent = 0; | |
4487 | mddev->external = 1; | |
8bb93aac N |
4488 | mddev->major_version = 0; |
4489 | mddev->minor_version = 90; | |
6791875e | 4490 | goto out_unlock; |
8bb93aac N |
4491 | } |
4492 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4493 | err = -EINVAL; |
8bb93aac | 4494 | if (e==buf || *e != '.') |
6791875e | 4495 | goto out_unlock; |
8bb93aac N |
4496 | buf = e+1; |
4497 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4498 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4499 | goto out_unlock; |
4500 | err = -ENOENT; | |
50511da3 | 4501 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4502 | goto out_unlock; |
8bb93aac N |
4503 | mddev->major_version = major; |
4504 | mddev->minor_version = minor; | |
4505 | mddev->persistent = 1; | |
e691063a | 4506 | mddev->external = 0; |
6791875e N |
4507 | err = 0; |
4508 | out_unlock: | |
4509 | mddev_unlock(mddev); | |
4510 | return err ?: len; | |
8bb93aac N |
4511 | } |
4512 | ||
4513 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4514 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4515 | |
24dd469d | 4516 | static ssize_t |
fd01b88c | 4517 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4518 | { |
7eec314d | 4519 | char *type = "idle"; |
b7b17c9b N |
4520 | unsigned long recovery = mddev->recovery; |
4521 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4522 | type = "frozen"; |
b7b17c9b N |
4523 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4524 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4525 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4526 | type = "reshape"; |
b7b17c9b N |
4527 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4528 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4529 | type = "resync"; |
b7b17c9b | 4530 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4531 | type = "check"; |
4532 | else | |
4533 | type = "repair"; | |
b7b17c9b | 4534 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4535 | type = "recover"; |
985ca973 N |
4536 | else if (mddev->reshape_position != MaxSector) |
4537 | type = "reshape"; | |
24dd469d N |
4538 | } |
4539 | return sprintf(page, "%s\n", type); | |
4540 | } | |
4541 | ||
4542 | static ssize_t | |
fd01b88c | 4543 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4544 | { |
7eec314d N |
4545 | if (!mddev->pers || !mddev->pers->sync_request) |
4546 | return -EINVAL; | |
4547 | ||
b6a9ce68 N |
4548 | |
4549 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4550 | if (cmd_match(page, "frozen")) |
4551 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4552 | else | |
4553 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4554 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4555 | mddev_lock(mddev) == 0) { | |
4556 | flush_workqueue(md_misc_wq); | |
4557 | if (mddev->sync_thread) { | |
4558 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4559 | md_reap_sync_thread(mddev); |
6791875e | 4560 | } |
8e8e2518 | 4561 | mddev_unlock(mddev); |
7eec314d | 4562 | } |
312045ee | 4563 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4564 | return -EBUSY; |
72a23c21 | 4565 | else if (cmd_match(page, "resync")) |
56ccc112 | 4566 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4567 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4568 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4569 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4570 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4571 | int err; |
4572 | if (mddev->pers->start_reshape == NULL) | |
4573 | return -EINVAL; | |
6791875e N |
4574 | err = mddev_lock(mddev); |
4575 | if (!err) { | |
312045ee N |
4576 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4577 | err = -EBUSY; | |
4578 | else { | |
4579 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4580 | err = mddev->pers->start_reshape(mddev); | |
4581 | } | |
6791875e N |
4582 | mddev_unlock(mddev); |
4583 | } | |
16484bf5 N |
4584 | if (err) |
4585 | return err; | |
a99ac971 | 4586 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4587 | } else { |
bce74dac | 4588 | if (cmd_match(page, "check")) |
7eec314d | 4589 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4590 | else if (!cmd_match(page, "repair")) |
7eec314d | 4591 | return -EINVAL; |
56ccc112 | 4592 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4593 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4594 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4595 | } |
48c26ddc N |
4596 | if (mddev->ro == 2) { |
4597 | /* A write to sync_action is enough to justify | |
4598 | * canceling read-auto mode | |
4599 | */ | |
4600 | mddev->ro = 0; | |
4601 | md_wakeup_thread(mddev->sync_thread); | |
4602 | } | |
03c902e1 | 4603 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4604 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4605 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4606 | return len; |
4607 | } | |
4608 | ||
c4a39551 | 4609 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4610 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4611 | |
4612 | static ssize_t | |
4613 | last_sync_action_show(struct mddev *mddev, char *page) | |
4614 | { | |
4615 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4616 | } | |
4617 | ||
4618 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4619 | ||
9d88883e | 4620 | static ssize_t |
fd01b88c | 4621 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4622 | { |
4623 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4624 | (unsigned long long) |
4625 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4626 | } |
4627 | ||
80ca3a44 | 4628 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4629 | |
88202a0c | 4630 | static ssize_t |
fd01b88c | 4631 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4632 | { |
4633 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4634 | mddev->sync_speed_min ? "local": "system"); | |
4635 | } | |
4636 | ||
4637 | static ssize_t | |
fd01b88c | 4638 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4639 | { |
4c9309c0 AD |
4640 | unsigned int min; |
4641 | int rv; | |
4642 | ||
88202a0c | 4643 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4644 | min = 0; |
4645 | } else { | |
4646 | rv = kstrtouint(buf, 10, &min); | |
4647 | if (rv < 0) | |
4648 | return rv; | |
4649 | if (min == 0) | |
4650 | return -EINVAL; | |
88202a0c | 4651 | } |
88202a0c N |
4652 | mddev->sync_speed_min = min; |
4653 | return len; | |
4654 | } | |
4655 | ||
4656 | static struct md_sysfs_entry md_sync_min = | |
4657 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4658 | ||
4659 | static ssize_t | |
fd01b88c | 4660 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4661 | { |
4662 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4663 | mddev->sync_speed_max ? "local": "system"); | |
4664 | } | |
4665 | ||
4666 | static ssize_t | |
fd01b88c | 4667 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4668 | { |
4c9309c0 AD |
4669 | unsigned int max; |
4670 | int rv; | |
4671 | ||
88202a0c | 4672 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4673 | max = 0; |
4674 | } else { | |
4675 | rv = kstrtouint(buf, 10, &max); | |
4676 | if (rv < 0) | |
4677 | return rv; | |
4678 | if (max == 0) | |
4679 | return -EINVAL; | |
88202a0c | 4680 | } |
88202a0c N |
4681 | mddev->sync_speed_max = max; |
4682 | return len; | |
4683 | } | |
4684 | ||
4685 | static struct md_sysfs_entry md_sync_max = | |
4686 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4687 | ||
d7f3d291 | 4688 | static ssize_t |
fd01b88c | 4689 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4690 | { |
4691 | return sprintf(page, "%d\n", mddev->degraded); | |
4692 | } | |
4693 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4694 | |
90b08710 | 4695 | static ssize_t |
fd01b88c | 4696 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4697 | { |
4698 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4699 | } | |
4700 | ||
4701 | static ssize_t | |
fd01b88c | 4702 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4703 | { |
4704 | long n; | |
4705 | ||
b29bebd6 | 4706 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4707 | return -EINVAL; |
4708 | ||
4709 | if (n != 0 && n != 1) | |
4710 | return -EINVAL; | |
4711 | ||
4712 | mddev->parallel_resync = n; | |
4713 | ||
4714 | if (mddev->sync_thread) | |
4715 | wake_up(&resync_wait); | |
4716 | ||
4717 | return len; | |
4718 | } | |
4719 | ||
4720 | /* force parallel resync, even with shared block devices */ | |
4721 | static struct md_sysfs_entry md_sync_force_parallel = | |
4722 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4723 | sync_force_parallel_show, sync_force_parallel_store); | |
4724 | ||
88202a0c | 4725 | static ssize_t |
fd01b88c | 4726 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4727 | { |
4728 | unsigned long resync, dt, db; | |
d1a7c503 N |
4729 | if (mddev->curr_resync == 0) |
4730 | return sprintf(page, "none\n"); | |
9687a60c AN |
4731 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4732 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4733 | if (!dt) dt++; |
9687a60c AN |
4734 | db = resync - mddev->resync_mark_cnt; |
4735 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4736 | } |
4737 | ||
80ca3a44 | 4738 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4739 | |
4740 | static ssize_t | |
fd01b88c | 4741 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4742 | { |
13ae864b | 4743 | unsigned long long max_sectors, resync; |
88202a0c | 4744 | |
acb180b0 N |
4745 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4746 | return sprintf(page, "none\n"); | |
4747 | ||
72f36d59 N |
4748 | if (mddev->curr_resync == 1 || |
4749 | mddev->curr_resync == 2) | |
4750 | return sprintf(page, "delayed\n"); | |
4751 | ||
c804cdec N |
4752 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4753 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4754 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4755 | else |
58c0fed4 | 4756 | max_sectors = mddev->dev_sectors; |
88202a0c | 4757 | |
acb180b0 | 4758 | resync = mddev->curr_resync_completed; |
13ae864b | 4759 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4760 | } |
4761 | ||
750f199e N |
4762 | static struct md_sysfs_entry md_sync_completed = |
4763 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4764 | |
5e96ee65 | 4765 | static ssize_t |
fd01b88c | 4766 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4767 | { |
4768 | return sprintf(page, "%llu\n", | |
4769 | (unsigned long long)mddev->resync_min); | |
4770 | } | |
4771 | static ssize_t | |
fd01b88c | 4772 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4773 | { |
4774 | unsigned long long min; | |
23da422b | 4775 | int err; |
23da422b | 4776 | |
b29bebd6 | 4777 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4778 | return -EINVAL; |
23da422b N |
4779 | |
4780 | spin_lock(&mddev->lock); | |
4781 | err = -EINVAL; | |
5e96ee65 | 4782 | if (min > mddev->resync_max) |
23da422b N |
4783 | goto out_unlock; |
4784 | ||
4785 | err = -EBUSY; | |
5e96ee65 | 4786 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4787 | goto out_unlock; |
5e96ee65 | 4788 | |
50c37b13 N |
4789 | /* Round down to multiple of 4K for safety */ |
4790 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4791 | err = 0; |
5e96ee65 | 4792 | |
23da422b N |
4793 | out_unlock: |
4794 | spin_unlock(&mddev->lock); | |
4795 | return err ?: len; | |
5e96ee65 NB |
4796 | } |
4797 | ||
4798 | static struct md_sysfs_entry md_min_sync = | |
4799 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4800 | ||
c6207277 | 4801 | static ssize_t |
fd01b88c | 4802 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4803 | { |
4804 | if (mddev->resync_max == MaxSector) | |
4805 | return sprintf(page, "max\n"); | |
4806 | else | |
4807 | return sprintf(page, "%llu\n", | |
4808 | (unsigned long long)mddev->resync_max); | |
4809 | } | |
4810 | static ssize_t | |
fd01b88c | 4811 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4812 | { |
23da422b N |
4813 | int err; |
4814 | spin_lock(&mddev->lock); | |
c6207277 N |
4815 | if (strncmp(buf, "max", 3) == 0) |
4816 | mddev->resync_max = MaxSector; | |
4817 | else { | |
5e96ee65 | 4818 | unsigned long long max; |
23da422b N |
4819 | int chunk; |
4820 | ||
4821 | err = -EINVAL; | |
b29bebd6 | 4822 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4823 | goto out_unlock; |
5e96ee65 | 4824 | if (max < mddev->resync_min) |
23da422b N |
4825 | goto out_unlock; |
4826 | ||
4827 | err = -EBUSY; | |
c6207277 | 4828 | if (max < mddev->resync_max && |
4d484a4a | 4829 | mddev->ro == 0 && |
c6207277 | 4830 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4831 | goto out_unlock; |
c6207277 N |
4832 | |
4833 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4834 | chunk = mddev->chunk_sectors; |
4835 | if (chunk) { | |
2ac06c33 | 4836 | sector_t temp = max; |
23da422b N |
4837 | |
4838 | err = -EINVAL; | |
4839 | if (sector_div(temp, chunk)) | |
4840 | goto out_unlock; | |
c6207277 N |
4841 | } |
4842 | mddev->resync_max = max; | |
4843 | } | |
4844 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4845 | err = 0; |
4846 | out_unlock: | |
4847 | spin_unlock(&mddev->lock); | |
4848 | return err ?: len; | |
c6207277 N |
4849 | } |
4850 | ||
4851 | static struct md_sysfs_entry md_max_sync = | |
4852 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4853 | ||
e464eafd | 4854 | static ssize_t |
fd01b88c | 4855 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4856 | { |
4857 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4858 | } | |
4859 | ||
4860 | static ssize_t | |
fd01b88c | 4861 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4862 | { |
b03e0ccb | 4863 | unsigned long long new; |
6791875e | 4864 | int err; |
e464eafd | 4865 | |
4c9309c0 AD |
4866 | err = kstrtoull(buf, 10, &new); |
4867 | if (err < 0) | |
4868 | return err; | |
4869 | if (new != (sector_t)new) | |
e464eafd | 4870 | return -EINVAL; |
23ddff37 | 4871 | |
6791875e N |
4872 | err = mddev_lock(mddev); |
4873 | if (err) | |
4874 | return err; | |
4875 | err = -EINVAL; | |
4876 | if (mddev->pers == NULL || | |
4877 | mddev->pers->quiesce == NULL) | |
4878 | goto unlock; | |
b03e0ccb | 4879 | mddev_suspend(mddev); |
23ddff37 | 4880 | mddev->suspend_lo = new; |
b03e0ccb N |
4881 | mddev_resume(mddev); |
4882 | ||
6791875e N |
4883 | err = 0; |
4884 | unlock: | |
4885 | mddev_unlock(mddev); | |
4886 | return err ?: len; | |
e464eafd N |
4887 | } |
4888 | static struct md_sysfs_entry md_suspend_lo = | |
4889 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4890 | ||
e464eafd | 4891 | static ssize_t |
fd01b88c | 4892 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4893 | { |
4894 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4895 | } | |
4896 | ||
4897 | static ssize_t | |
fd01b88c | 4898 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4899 | { |
b03e0ccb | 4900 | unsigned long long new; |
6791875e | 4901 | int err; |
e464eafd | 4902 | |
4c9309c0 AD |
4903 | err = kstrtoull(buf, 10, &new); |
4904 | if (err < 0) | |
4905 | return err; | |
4906 | if (new != (sector_t)new) | |
e464eafd | 4907 | return -EINVAL; |
23ddff37 | 4908 | |
6791875e N |
4909 | err = mddev_lock(mddev); |
4910 | if (err) | |
4911 | return err; | |
4912 | err = -EINVAL; | |
b03e0ccb | 4913 | if (mddev->pers == NULL) |
6791875e | 4914 | goto unlock; |
b03e0ccb N |
4915 | |
4916 | mddev_suspend(mddev); | |
23ddff37 | 4917 | mddev->suspend_hi = new; |
b03e0ccb N |
4918 | mddev_resume(mddev); |
4919 | ||
6791875e N |
4920 | err = 0; |
4921 | unlock: | |
4922 | mddev_unlock(mddev); | |
4923 | return err ?: len; | |
e464eafd N |
4924 | } |
4925 | static struct md_sysfs_entry md_suspend_hi = | |
4926 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
4927 | ||
08a02ecd | 4928 | static ssize_t |
fd01b88c | 4929 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
4930 | { |
4931 | if (mddev->reshape_position != MaxSector) | |
4932 | return sprintf(page, "%llu\n", | |
4933 | (unsigned long long)mddev->reshape_position); | |
4934 | strcpy(page, "none\n"); | |
4935 | return 5; | |
4936 | } | |
4937 | ||
4938 | static ssize_t | |
fd01b88c | 4939 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 4940 | { |
c6563a8c | 4941 | struct md_rdev *rdev; |
4c9309c0 | 4942 | unsigned long long new; |
6791875e | 4943 | int err; |
6791875e | 4944 | |
4c9309c0 AD |
4945 | err = kstrtoull(buf, 10, &new); |
4946 | if (err < 0) | |
4947 | return err; | |
4948 | if (new != (sector_t)new) | |
08a02ecd | 4949 | return -EINVAL; |
6791875e N |
4950 | err = mddev_lock(mddev); |
4951 | if (err) | |
4952 | return err; | |
4953 | err = -EBUSY; | |
4954 | if (mddev->pers) | |
4955 | goto unlock; | |
08a02ecd N |
4956 | mddev->reshape_position = new; |
4957 | mddev->delta_disks = 0; | |
2c810cdd | 4958 | mddev->reshape_backwards = 0; |
08a02ecd N |
4959 | mddev->new_level = mddev->level; |
4960 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4961 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
4962 | rdev_for_each(rdev, mddev) |
4963 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
4964 | err = 0; |
4965 | unlock: | |
4966 | mddev_unlock(mddev); | |
4967 | return err ?: len; | |
08a02ecd N |
4968 | } |
4969 | ||
4970 | static struct md_sysfs_entry md_reshape_position = | |
4971 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
4972 | reshape_position_store); | |
4973 | ||
2c810cdd N |
4974 | static ssize_t |
4975 | reshape_direction_show(struct mddev *mddev, char *page) | |
4976 | { | |
4977 | return sprintf(page, "%s\n", | |
4978 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
4979 | } | |
4980 | ||
4981 | static ssize_t | |
4982 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
4983 | { | |
4984 | int backwards = 0; | |
6791875e N |
4985 | int err; |
4986 | ||
2c810cdd N |
4987 | if (cmd_match(buf, "forwards")) |
4988 | backwards = 0; | |
4989 | else if (cmd_match(buf, "backwards")) | |
4990 | backwards = 1; | |
4991 | else | |
4992 | return -EINVAL; | |
4993 | if (mddev->reshape_backwards == backwards) | |
4994 | return len; | |
4995 | ||
6791875e N |
4996 | err = mddev_lock(mddev); |
4997 | if (err) | |
4998 | return err; | |
2c810cdd N |
4999 | /* check if we are allowed to change */ |
5000 | if (mddev->delta_disks) | |
6791875e N |
5001 | err = -EBUSY; |
5002 | else if (mddev->persistent && | |
2c810cdd | 5003 | mddev->major_version == 0) |
6791875e N |
5004 | err = -EINVAL; |
5005 | else | |
5006 | mddev->reshape_backwards = backwards; | |
5007 | mddev_unlock(mddev); | |
5008 | return err ?: len; | |
2c810cdd N |
5009 | } |
5010 | ||
5011 | static struct md_sysfs_entry md_reshape_direction = | |
5012 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5013 | reshape_direction_store); | |
5014 | ||
b522adcd | 5015 | static ssize_t |
fd01b88c | 5016 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5017 | { |
5018 | if (mddev->external_size) | |
5019 | return sprintf(page, "%llu\n", | |
5020 | (unsigned long long)mddev->array_sectors/2); | |
5021 | else | |
5022 | return sprintf(page, "default\n"); | |
5023 | } | |
5024 | ||
5025 | static ssize_t | |
fd01b88c | 5026 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5027 | { |
5028 | sector_t sectors; | |
6791875e N |
5029 | int err; |
5030 | ||
5031 | err = mddev_lock(mddev); | |
5032 | if (err) | |
5033 | return err; | |
b522adcd | 5034 | |
ab5a98b1 | 5035 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5036 | if (mddev_is_clustered(mddev)) { |
5037 | mddev_unlock(mddev); | |
ab5a98b1 | 5038 | return -EINVAL; |
b670883b | 5039 | } |
ab5a98b1 | 5040 | |
b522adcd DW |
5041 | if (strncmp(buf, "default", 7) == 0) { |
5042 | if (mddev->pers) | |
5043 | sectors = mddev->pers->size(mddev, 0, 0); | |
5044 | else | |
5045 | sectors = mddev->array_sectors; | |
5046 | ||
5047 | mddev->external_size = 0; | |
5048 | } else { | |
5049 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5050 | err = -EINVAL; |
5051 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5052 | err = -E2BIG; | |
5053 | else | |
5054 | mddev->external_size = 1; | |
b522adcd DW |
5055 | } |
5056 | ||
6791875e N |
5057 | if (!err) { |
5058 | mddev->array_sectors = sectors; | |
5059 | if (mddev->pers) { | |
5060 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5061 | revalidate_disk(mddev->gendisk); | |
5062 | } | |
cbe6ef1d | 5063 | } |
6791875e N |
5064 | mddev_unlock(mddev); |
5065 | return err ?: len; | |
b522adcd DW |
5066 | } |
5067 | ||
5068 | static struct md_sysfs_entry md_array_size = | |
5069 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5070 | array_size_store); | |
e464eafd | 5071 | |
664aed04 AP |
5072 | static ssize_t |
5073 | consistency_policy_show(struct mddev *mddev, char *page) | |
5074 | { | |
5075 | int ret; | |
5076 | ||
5077 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5078 | ret = sprintf(page, "journal\n"); | |
5079 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5080 | ret = sprintf(page, "ppl\n"); | |
5081 | } else if (mddev->bitmap) { | |
5082 | ret = sprintf(page, "bitmap\n"); | |
5083 | } else if (mddev->pers) { | |
5084 | if (mddev->pers->sync_request) | |
5085 | ret = sprintf(page, "resync\n"); | |
5086 | else | |
5087 | ret = sprintf(page, "none\n"); | |
5088 | } else { | |
5089 | ret = sprintf(page, "unknown\n"); | |
5090 | } | |
5091 | ||
5092 | return ret; | |
5093 | } | |
5094 | ||
5095 | static ssize_t | |
5096 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5097 | { | |
ba903a3e AP |
5098 | int err = 0; |
5099 | ||
664aed04 | 5100 | if (mddev->pers) { |
ba903a3e AP |
5101 | if (mddev->pers->change_consistency_policy) |
5102 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5103 | else | |
5104 | err = -EBUSY; | |
664aed04 AP |
5105 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5106 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5107 | } else { |
ba903a3e | 5108 | err = -EINVAL; |
664aed04 | 5109 | } |
ba903a3e AP |
5110 | |
5111 | return err ? err : len; | |
664aed04 AP |
5112 | } |
5113 | ||
5114 | static struct md_sysfs_entry md_consistency_policy = | |
5115 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5116 | consistency_policy_store); | |
5117 | ||
eae1701f N |
5118 | static struct attribute *md_default_attrs[] = { |
5119 | &md_level.attr, | |
d4dbd025 | 5120 | &md_layout.attr, |
eae1701f | 5121 | &md_raid_disks.attr, |
3b34380a | 5122 | &md_chunk_size.attr, |
a35b0d69 | 5123 | &md_size.attr, |
a94213b1 | 5124 | &md_resync_start.attr, |
8bb93aac | 5125 | &md_metadata.attr, |
6d7ff738 | 5126 | &md_new_device.attr, |
16f17b39 | 5127 | &md_safe_delay.attr, |
9e653b63 | 5128 | &md_array_state.attr, |
08a02ecd | 5129 | &md_reshape_position.attr, |
2c810cdd | 5130 | &md_reshape_direction.attr, |
b522adcd | 5131 | &md_array_size.attr, |
1e50915f | 5132 | &max_corr_read_errors.attr, |
664aed04 | 5133 | &md_consistency_policy.attr, |
411036fa N |
5134 | NULL, |
5135 | }; | |
5136 | ||
5137 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5138 | &md_scan_mode.attr, |
c4a39551 | 5139 | &md_last_scan_mode.attr, |
9d88883e | 5140 | &md_mismatches.attr, |
88202a0c N |
5141 | &md_sync_min.attr, |
5142 | &md_sync_max.attr, | |
5143 | &md_sync_speed.attr, | |
90b08710 | 5144 | &md_sync_force_parallel.attr, |
88202a0c | 5145 | &md_sync_completed.attr, |
5e96ee65 | 5146 | &md_min_sync.attr, |
c6207277 | 5147 | &md_max_sync.attr, |
e464eafd N |
5148 | &md_suspend_lo.attr, |
5149 | &md_suspend_hi.attr, | |
9b1d1dac | 5150 | &md_bitmap.attr, |
d7f3d291 | 5151 | &md_degraded.attr, |
eae1701f N |
5152 | NULL, |
5153 | }; | |
411036fa N |
5154 | static struct attribute_group md_redundancy_group = { |
5155 | .name = NULL, | |
5156 | .attrs = md_redundancy_attrs, | |
5157 | }; | |
5158 | ||
eae1701f N |
5159 | static ssize_t |
5160 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5161 | { | |
5162 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5163 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5164 | ssize_t rv; |
eae1701f N |
5165 | |
5166 | if (!entry->show) | |
5167 | return -EIO; | |
af8a2434 N |
5168 | spin_lock(&all_mddevs_lock); |
5169 | if (list_empty(&mddev->all_mddevs)) { | |
5170 | spin_unlock(&all_mddevs_lock); | |
5171 | return -EBUSY; | |
5172 | } | |
5173 | mddev_get(mddev); | |
5174 | spin_unlock(&all_mddevs_lock); | |
5175 | ||
b7b17c9b | 5176 | rv = entry->show(mddev, page); |
af8a2434 | 5177 | mddev_put(mddev); |
96de1e66 | 5178 | return rv; |
eae1701f N |
5179 | } |
5180 | ||
5181 | static ssize_t | |
5182 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5183 | const char *page, size_t length) | |
5184 | { | |
5185 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5186 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5187 | ssize_t rv; |
eae1701f N |
5188 | |
5189 | if (!entry->store) | |
5190 | return -EIO; | |
67463acb N |
5191 | if (!capable(CAP_SYS_ADMIN)) |
5192 | return -EACCES; | |
af8a2434 N |
5193 | spin_lock(&all_mddevs_lock); |
5194 | if (list_empty(&mddev->all_mddevs)) { | |
5195 | spin_unlock(&all_mddevs_lock); | |
5196 | return -EBUSY; | |
5197 | } | |
5198 | mddev_get(mddev); | |
5199 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5200 | rv = entry->store(mddev, page, length); |
af8a2434 | 5201 | mddev_put(mddev); |
96de1e66 | 5202 | return rv; |
eae1701f N |
5203 | } |
5204 | ||
5205 | static void md_free(struct kobject *ko) | |
5206 | { | |
fd01b88c | 5207 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5208 | |
5209 | if (mddev->sysfs_state) | |
5210 | sysfs_put(mddev->sysfs_state); | |
5211 | ||
d8115c35 BVA |
5212 | if (mddev->gendisk) |
5213 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5214 | if (mddev->queue) |
5215 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5216 | if (mddev->gendisk) |
a21d1504 | 5217 | put_disk(mddev->gendisk); |
4ad23a97 | 5218 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5219 | |
28dec870 KO |
5220 | bioset_exit(&mddev->bio_set); |
5221 | bioset_exit(&mddev->sync_set); | |
eae1701f N |
5222 | kfree(mddev); |
5223 | } | |
5224 | ||
52cf25d0 | 5225 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5226 | .show = md_attr_show, |
5227 | .store = md_attr_store, | |
5228 | }; | |
5229 | static struct kobj_type md_ktype = { | |
5230 | .release = md_free, | |
5231 | .sysfs_ops = &md_sysfs_ops, | |
5232 | .default_attrs = md_default_attrs, | |
5233 | }; | |
5234 | ||
1da177e4 LT |
5235 | int mdp_major = 0; |
5236 | ||
5fd3a17e DW |
5237 | static void mddev_delayed_delete(struct work_struct *ws) |
5238 | { | |
fd01b88c | 5239 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5240 | |
43a70507 | 5241 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5242 | kobject_del(&mddev->kobj); |
5243 | kobject_put(&mddev->kobj); | |
5244 | } | |
5245 | ||
4ad23a97 N |
5246 | static void no_op(struct percpu_ref *r) {} |
5247 | ||
a415c0f1 N |
5248 | int mddev_init_writes_pending(struct mddev *mddev) |
5249 | { | |
5250 | if (mddev->writes_pending.percpu_count_ptr) | |
5251 | return 0; | |
5252 | if (percpu_ref_init(&mddev->writes_pending, no_op, 0, GFP_KERNEL) < 0) | |
5253 | return -ENOMEM; | |
5254 | /* We want to start with the refcount at zero */ | |
5255 | percpu_ref_put(&mddev->writes_pending); | |
5256 | return 0; | |
5257 | } | |
5258 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5259 | ||
efeb53c0 | 5260 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5261 | { |
039b7225 N |
5262 | /* |
5263 | * If dev is zero, name is the name of a device to allocate with | |
5264 | * an arbitrary minor number. It will be "md_???" | |
5265 | * If dev is non-zero it must be a device number with a MAJOR of | |
5266 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5267 | * the device is being created by opening a node in /dev. | |
5268 | * If "name" is not NULL, the device is being created by | |
5269 | * writing to /sys/module/md_mod/parameters/new_array. | |
5270 | */ | |
48c9c27b | 5271 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5272 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5273 | struct gendisk *disk; |
efeb53c0 N |
5274 | int partitioned; |
5275 | int shift; | |
5276 | int unit; | |
3830c62f | 5277 | int error; |
1da177e4 LT |
5278 | |
5279 | if (!mddev) | |
efeb53c0 N |
5280 | return -ENODEV; |
5281 | ||
5282 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5283 | shift = partitioned ? MdpMinorShift : 0; | |
5284 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5285 | |
e804ac78 TH |
5286 | /* wait for any previous instance of this device to be |
5287 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5288 | */ |
e804ac78 | 5289 | flush_workqueue(md_misc_wq); |
d3374825 | 5290 | |
48c9c27b | 5291 | mutex_lock(&disks_mutex); |
0909dc44 N |
5292 | error = -EEXIST; |
5293 | if (mddev->gendisk) | |
5294 | goto abort; | |
efeb53c0 | 5295 | |
039b7225 | 5296 | if (name && !dev) { |
efeb53c0 N |
5297 | /* Need to ensure that 'name' is not a duplicate. |
5298 | */ | |
fd01b88c | 5299 | struct mddev *mddev2; |
efeb53c0 N |
5300 | spin_lock(&all_mddevs_lock); |
5301 | ||
5302 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5303 | if (mddev2->gendisk && | |
5304 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5305 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5306 | goto abort; |
efeb53c0 N |
5307 | } |
5308 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5309 | } |
039b7225 N |
5310 | if (name && dev) |
5311 | /* | |
5312 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5313 | */ | |
5314 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5315 | |
0909dc44 | 5316 | error = -ENOMEM; |
8b765398 | 5317 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5318 | if (!mddev->queue) |
5319 | goto abort; | |
409c57f3 N |
5320 | mddev->queue->queuedata = mddev; |
5321 | ||
409c57f3 | 5322 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5323 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5324 | |
1da177e4 LT |
5325 | disk = alloc_disk(1 << shift); |
5326 | if (!disk) { | |
8b765398 N |
5327 | blk_cleanup_queue(mddev->queue); |
5328 | mddev->queue = NULL; | |
0909dc44 | 5329 | goto abort; |
1da177e4 | 5330 | } |
efeb53c0 | 5331 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5332 | disk->first_minor = unit << shift; |
efeb53c0 N |
5333 | if (name) |
5334 | strcpy(disk->disk_name, name); | |
5335 | else if (partitioned) | |
1da177e4 | 5336 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5337 | else |
1da177e4 | 5338 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5339 | disk->fops = &md_fops; |
5340 | disk->private_data = mddev; | |
5341 | disk->queue = mddev->queue; | |
56883a7e | 5342 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5343 | /* Allow extended partitions. This makes the |
d3374825 | 5344 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5345 | * remove it now. |
5346 | */ | |
5347 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5348 | mddev->gendisk = disk; |
b0140891 N |
5349 | /* As soon as we call add_disk(), another thread could get |
5350 | * through to md_open, so make sure it doesn't get too far | |
5351 | */ | |
5352 | mutex_lock(&mddev->open_mutex); | |
5353 | add_disk(disk); | |
5354 | ||
28dec870 | 5355 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5356 | if (error) { |
5357 | /* This isn't possible, but as kobject_init_and_add is marked | |
5358 | * __must_check, we must do something with the result | |
5359 | */ | |
9d48739e N |
5360 | pr_debug("md: cannot register %s/md - name in use\n", |
5361 | disk->disk_name); | |
0909dc44 N |
5362 | error = 0; |
5363 | } | |
00bcb4ac N |
5364 | if (mddev->kobj.sd && |
5365 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5366 | pr_debug("pointless warning\n"); |
b0140891 | 5367 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5368 | abort: |
5369 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5370 | if (!error && mddev->kobj.sd) { |
3830c62f | 5371 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5372 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5373 | } |
d3374825 | 5374 | mddev_put(mddev); |
0909dc44 | 5375 | return error; |
efeb53c0 N |
5376 | } |
5377 | ||
5378 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5379 | { | |
78b6350d N |
5380 | if (create_on_open) |
5381 | md_alloc(dev, NULL); | |
1da177e4 LT |
5382 | return NULL; |
5383 | } | |
5384 | ||
e4dca7b7 | 5385 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5386 | { |
039b7225 N |
5387 | /* |
5388 | * val must be "md_*" or "mdNNN". | |
5389 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5390 | * set the name to val. val must not already be an active name. |
039b7225 N |
5391 | * For "mdNNN" we allocate an array with the minor number NNN |
5392 | * which must not already be in use. | |
efeb53c0 N |
5393 | */ |
5394 | int len = strlen(val); | |
5395 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5396 | unsigned long devnum; |
efeb53c0 N |
5397 | |
5398 | while (len && val[len-1] == '\n') | |
5399 | len--; | |
5400 | if (len >= DISK_NAME_LEN) | |
5401 | return -E2BIG; | |
5402 | strlcpy(buf, val, len+1); | |
039b7225 N |
5403 | if (strncmp(buf, "md_", 3) == 0) |
5404 | return md_alloc(0, buf); | |
5405 | if (strncmp(buf, "md", 2) == 0 && | |
5406 | isdigit(buf[2]) && | |
5407 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5408 | devnum <= MINORMASK) | |
5409 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5410 | ||
5411 | return -EINVAL; | |
efeb53c0 N |
5412 | } |
5413 | ||
8376d3c1 | 5414 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5415 | { |
8376d3c1 | 5416 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5417 | |
4ad23a97 N |
5418 | mddev->safemode = 1; |
5419 | if (mddev->external) | |
5420 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5421 | ||
1da177e4 LT |
5422 | md_wakeup_thread(mddev->thread); |
5423 | } | |
5424 | ||
6ff8d8ec | 5425 | static int start_dirty_degraded; |
1da177e4 | 5426 | |
fd01b88c | 5427 | int md_run(struct mddev *mddev) |
1da177e4 | 5428 | { |
2604b703 | 5429 | int err; |
3cb03002 | 5430 | struct md_rdev *rdev; |
84fc4b56 | 5431 | struct md_personality *pers; |
1da177e4 | 5432 | |
a757e64c N |
5433 | if (list_empty(&mddev->disks)) |
5434 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5435 | return -EINVAL; |
1da177e4 LT |
5436 | |
5437 | if (mddev->pers) | |
5438 | return -EBUSY; | |
bb4f1e9d N |
5439 | /* Cannot run until previous stop completes properly */ |
5440 | if (mddev->sysfs_active) | |
5441 | return -EBUSY; | |
b6eb127d | 5442 | |
1da177e4 LT |
5443 | /* |
5444 | * Analyze all RAID superblock(s) | |
5445 | */ | |
1ec4a939 N |
5446 | if (!mddev->raid_disks) { |
5447 | if (!mddev->persistent) | |
5448 | return -EINVAL; | |
a757e64c | 5449 | analyze_sbs(mddev); |
1ec4a939 | 5450 | } |
1da177e4 | 5451 | |
d9d166c2 N |
5452 | if (mddev->level != LEVEL_NONE) |
5453 | request_module("md-level-%d", mddev->level); | |
5454 | else if (mddev->clevel[0]) | |
5455 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5456 | |
5457 | /* | |
5458 | * Drop all container device buffers, from now on | |
5459 | * the only valid external interface is through the md | |
5460 | * device. | |
1da177e4 | 5461 | */ |
4b6c1060 | 5462 | mddev->has_superblocks = false; |
dafb20fa | 5463 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5464 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5465 | continue; |
5466 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5467 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5468 | if (mddev->ro != 1 && |
5469 | (bdev_read_only(rdev->bdev) || | |
5470 | bdev_read_only(rdev->meta_bdev))) { | |
5471 | mddev->ro = 1; | |
5472 | if (mddev->gendisk) | |
5473 | set_disk_ro(mddev->gendisk, 1); | |
5474 | } | |
f0d76d70 | 5475 | |
4b6c1060 HM |
5476 | if (rdev->sb_page) |
5477 | mddev->has_superblocks = true; | |
5478 | ||
f0d76d70 N |
5479 | /* perform some consistency tests on the device. |
5480 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5481 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5482 | */ |
a6ff7e08 JB |
5483 | if (rdev->meta_bdev) { |
5484 | /* Nothing to check */; | |
5485 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5486 | if (mddev->dev_sectors && |
5487 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5488 | > rdev->sb_start) { |
9d48739e N |
5489 | pr_warn("md: %s: data overlaps metadata\n", |
5490 | mdname(mddev)); | |
f0d76d70 N |
5491 | return -EINVAL; |
5492 | } | |
5493 | } else { | |
0f420358 | 5494 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5495 | > rdev->data_offset) { |
9d48739e N |
5496 | pr_warn("md: %s: metadata overlaps data\n", |
5497 | mdname(mddev)); | |
f0d76d70 N |
5498 | return -EINVAL; |
5499 | } | |
5500 | } | |
00bcb4ac | 5501 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5502 | } |
5503 | ||
afeee514 KO |
5504 | if (!bioset_initialized(&mddev->bio_set)) { |
5505 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5506 | if (err) | |
5507 | return err; | |
10273170 | 5508 | } |
afeee514 KO |
5509 | if (!bioset_initialized(&mddev->sync_set)) { |
5510 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5511 | if (err) | |
28dec870 | 5512 | return err; |
5a85071c | 5513 | } |
5a409b4f XN |
5514 | if (mddev->flush_pool == NULL) { |
5515 | mddev->flush_pool = mempool_create(NR_FLUSH_INFOS, flush_info_alloc, | |
5516 | flush_info_free, mddev); | |
5517 | if (!mddev->flush_pool) { | |
5518 | err = -ENOMEM; | |
5519 | goto abort; | |
5520 | } | |
5521 | } | |
5522 | if (mddev->flush_bio_pool == NULL) { | |
5523 | mddev->flush_bio_pool = mempool_create(NR_FLUSH_BIOS, flush_bio_alloc, | |
5524 | flush_bio_free, mddev); | |
5525 | if (!mddev->flush_bio_pool) { | |
5526 | err = -ENOMEM; | |
5527 | goto abort; | |
5528 | } | |
5529 | } | |
a167f663 | 5530 | |
1da177e4 | 5531 | spin_lock(&pers_lock); |
d9d166c2 | 5532 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5533 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5534 | spin_unlock(&pers_lock); |
d9d166c2 | 5535 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5536 | pr_warn("md: personality for level %d is not loaded!\n", |
5537 | mddev->level); | |
d9d166c2 | 5538 | else |
9d48739e N |
5539 | pr_warn("md: personality for level %s is not loaded!\n", |
5540 | mddev->clevel); | |
bfc9dfdc SL |
5541 | err = -EINVAL; |
5542 | goto abort; | |
1da177e4 | 5543 | } |
1da177e4 | 5544 | spin_unlock(&pers_lock); |
34817e8c N |
5545 | if (mddev->level != pers->level) { |
5546 | mddev->level = pers->level; | |
5547 | mddev->new_level = pers->level; | |
5548 | } | |
d9d166c2 | 5549 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5550 | |
f6705578 | 5551 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5552 | pers->start_reshape == NULL) { |
f6705578 | 5553 | /* This personality cannot handle reshaping... */ |
f6705578 | 5554 | module_put(pers->owner); |
bfc9dfdc SL |
5555 | err = -EINVAL; |
5556 | goto abort; | |
f6705578 N |
5557 | } |
5558 | ||
7dd5e7c3 N |
5559 | if (pers->sync_request) { |
5560 | /* Warn if this is a potentially silly | |
5561 | * configuration. | |
5562 | */ | |
5563 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5564 | struct md_rdev *rdev2; |
7dd5e7c3 | 5565 | int warned = 0; |
159ec1fc | 5566 | |
dafb20fa N |
5567 | rdev_for_each(rdev, mddev) |
5568 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5569 | if (rdev < rdev2 && |
5570 | rdev->bdev->bd_contains == | |
5571 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5572 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5573 | mdname(mddev), | |
5574 | bdevname(rdev->bdev,b), | |
5575 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5576 | warned = 1; |
5577 | } | |
5578 | } | |
159ec1fc | 5579 | |
7dd5e7c3 | 5580 | if (warned) |
9d48739e | 5581 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5582 | } |
5583 | ||
657390d2 | 5584 | mddev->recovery = 0; |
58c0fed4 AN |
5585 | /* may be over-ridden by personality */ |
5586 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5587 | ||
6ff8d8ec | 5588 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5589 | |
0f9552b5 | 5590 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5591 | mddev->ro = 2; /* read-only, but switch on first write */ |
5592 | ||
36d091f4 | 5593 | err = pers->run(mddev); |
13e53df3 | 5594 | if (err) |
9d48739e | 5595 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5596 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5597 | WARN_ONCE(!mddev->external_size, |
5598 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5599 | __func__); | |
5600 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5601 | (unsigned long long)mddev->array_sectors / 2, | |
5602 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5603 | err = -EINVAL; |
b522adcd | 5604 | } |
36d091f4 | 5605 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5606 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5607 | struct bitmap *bitmap; |
5608 | ||
e64e4018 | 5609 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5610 | if (IS_ERR(bitmap)) { |
5611 | err = PTR_ERR(bitmap); | |
9d48739e N |
5612 | pr_warn("%s: failed to create bitmap (%d)\n", |
5613 | mdname(mddev), err); | |
f9209a32 GR |
5614 | } else |
5615 | mddev->bitmap = bitmap; | |
5616 | ||
b15c2e57 | 5617 | } |
1da177e4 | 5618 | if (err) { |
5aa61f42 | 5619 | mddev_detach(mddev); |
0c35bd47 N |
5620 | if (mddev->private) |
5621 | pers->free(mddev, mddev->private); | |
bd691922 | 5622 | mddev->private = NULL; |
36d091f4 | 5623 | module_put(pers->owner); |
e64e4018 | 5624 | md_bitmap_destroy(mddev); |
bfc9dfdc | 5625 | goto abort; |
1da177e4 | 5626 | } |
5c675f83 | 5627 | if (mddev->queue) { |
bb086a89 SL |
5628 | bool nonrot = true; |
5629 | ||
5630 | rdev_for_each(rdev, mddev) { | |
5631 | if (rdev->raid_disk >= 0 && | |
5632 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5633 | nonrot = false; | |
5634 | break; | |
5635 | } | |
5636 | } | |
5637 | if (mddev->degraded) | |
5638 | nonrot = false; | |
5639 | if (nonrot) | |
8b904b5b | 5640 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5641 | else |
8b904b5b | 5642 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
dc3b17cc JK |
5643 | mddev->queue->backing_dev_info->congested_data = mddev; |
5644 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5645 | } |
36d091f4 | 5646 | if (pers->sync_request) { |
00bcb4ac N |
5647 | if (mddev->kobj.sd && |
5648 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5649 | pr_warn("md: cannot register extra attributes for %s\n", |
5650 | mdname(mddev)); | |
00bcb4ac | 5651 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5652 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5653 | mddev->ro = 0; |
5654 | ||
1e50915f RB |
5655 | atomic_set(&mddev->max_corr_read_errors, |
5656 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5657 | mddev->safemode = 0; |
28c1b9fd GR |
5658 | if (mddev_is_clustered(mddev)) |
5659 | mddev->safemode_delay = 0; | |
5660 | else | |
5661 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5662 | mddev->in_sync = 1; |
0ca69886 | 5663 | smp_wmb(); |
36d091f4 N |
5664 | spin_lock(&mddev->lock); |
5665 | mddev->pers = pers; | |
36d091f4 | 5666 | spin_unlock(&mddev->lock); |
dafb20fa | 5667 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5668 | if (rdev->raid_disk >= 0) |
5669 | if (sysfs_link_rdev(mddev, rdev)) | |
00bcb4ac | 5670 | /* failure here is OK */; |
f72ffdd6 | 5671 | |
a4a3d26d N |
5672 | if (mddev->degraded && !mddev->ro) |
5673 | /* This ensures that recovering status is reported immediately | |
5674 | * via sysfs - until a lack of spares is confirmed. | |
5675 | */ | |
5676 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5677 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5678 | |
2953079c | 5679 | if (mddev->sb_flags) |
850b2b42 | 5680 | md_update_sb(mddev, 0); |
1da177e4 | 5681 | |
d7603b7e | 5682 | md_new_event(mddev); |
00bcb4ac N |
5683 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5684 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
a99ac971 | 5685 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
1da177e4 | 5686 | return 0; |
b126194c XN |
5687 | |
5688 | abort: | |
37b22c28 CX |
5689 | mempool_destroy(mddev->flush_bio_pool); |
5690 | mddev->flush_bio_pool = NULL; | |
5691 | mempool_destroy(mddev->flush_pool); | |
5692 | mddev->flush_pool = NULL; | |
b126194c XN |
5693 | |
5694 | return err; | |
1da177e4 | 5695 | } |
390ee602 | 5696 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5697 | |
fd01b88c | 5698 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5699 | { |
5700 | int err; | |
5701 | ||
5702 | err = md_run(mddev); | |
5703 | if (err) | |
5704 | goto out; | |
e64e4018 | 5705 | err = md_bitmap_load(mddev); |
69e51b44 | 5706 | if (err) { |
e64e4018 | 5707 | md_bitmap_destroy(mddev); |
69e51b44 N |
5708 | goto out; |
5709 | } | |
0fd018af | 5710 | |
28c1b9fd GR |
5711 | if (mddev_is_clustered(mddev)) |
5712 | md_allow_write(mddev); | |
5713 | ||
d5d885fd SL |
5714 | /* run start up tasks that require md_thread */ |
5715 | md_start(mddev); | |
5716 | ||
0fd018af JB |
5717 | md_wakeup_thread(mddev->thread); |
5718 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5719 | ||
fe60b014 N |
5720 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5721 | revalidate_disk(mddev->gendisk); | |
f0b4f7e2 | 5722 | mddev->changed = 1; |
fe60b014 N |
5723 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
5724 | out: | |
5725 | return err; | |
5726 | } | |
5727 | ||
d5d885fd SL |
5728 | int md_start(struct mddev *mddev) |
5729 | { | |
5730 | int ret = 0; | |
5731 | ||
5732 | if (mddev->pers->start) { | |
5733 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5734 | md_wakeup_thread(mddev->thread); | |
5735 | ret = mddev->pers->start(mddev); | |
5736 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5737 | md_wakeup_thread(mddev->sync_thread); | |
5738 | } | |
5739 | return ret; | |
5740 | } | |
5741 | EXPORT_SYMBOL_GPL(md_start); | |
5742 | ||
fd01b88c | 5743 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5744 | { |
5745 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
5746 | struct md_rdev *rdev; |
5747 | bool has_journal = false; | |
5748 | bool has_readonly = false; | |
1da177e4 | 5749 | |
80fab1d7 | 5750 | /* Complain if it has no devices */ |
1da177e4 | 5751 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5752 | return -ENXIO; |
5753 | if (!mddev->pers) | |
5754 | return -EINVAL; | |
5755 | if (!mddev->ro) | |
5756 | return -EBUSY; | |
339421de | 5757 | |
97b20ef7 N |
5758 | rcu_read_lock(); |
5759 | rdev_for_each_rcu(rdev, mddev) { | |
5760 | if (test_bit(Journal, &rdev->flags) && | |
5761 | !test_bit(Faulty, &rdev->flags)) | |
5762 | has_journal = true; | |
5763 | if (bdev_read_only(rdev->bdev)) | |
5764 | has_readonly = true; | |
5765 | } | |
5766 | rcu_read_unlock(); | |
5767 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 5768 | /* Don't restart rw with journal missing/faulty */ |
339421de | 5769 | return -EINVAL; |
97b20ef7 N |
5770 | if (has_readonly) |
5771 | return -EROFS; | |
339421de | 5772 | |
80fab1d7 AN |
5773 | mddev->safemode = 0; |
5774 | mddev->ro = 0; | |
5775 | set_disk_ro(disk, 0); | |
9d48739e | 5776 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5777 | /* Kick recovery or resync if necessary */ |
5778 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5779 | md_wakeup_thread(mddev->thread); | |
5780 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5781 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5782 | return 0; |
1da177e4 LT |
5783 | } |
5784 | ||
fd01b88c | 5785 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5786 | { |
5787 | mddev->array_sectors = 0; | |
5788 | mddev->external_size = 0; | |
5789 | mddev->dev_sectors = 0; | |
5790 | mddev->raid_disks = 0; | |
5791 | mddev->recovery_cp = 0; | |
5792 | mddev->resync_min = 0; | |
5793 | mddev->resync_max = MaxSector; | |
5794 | mddev->reshape_position = MaxSector; | |
5795 | mddev->external = 0; | |
5796 | mddev->persistent = 0; | |
5797 | mddev->level = LEVEL_NONE; | |
5798 | mddev->clevel[0] = 0; | |
5799 | mddev->flags = 0; | |
2953079c | 5800 | mddev->sb_flags = 0; |
6177b472 N |
5801 | mddev->ro = 0; |
5802 | mddev->metadata_type[0] = 0; | |
5803 | mddev->chunk_sectors = 0; | |
5804 | mddev->ctime = mddev->utime = 0; | |
5805 | mddev->layout = 0; | |
5806 | mddev->max_disks = 0; | |
5807 | mddev->events = 0; | |
a8707c08 | 5808 | mddev->can_decrease_events = 0; |
6177b472 | 5809 | mddev->delta_disks = 0; |
2c810cdd | 5810 | mddev->reshape_backwards = 0; |
6177b472 N |
5811 | mddev->new_level = LEVEL_NONE; |
5812 | mddev->new_layout = 0; | |
5813 | mddev->new_chunk_sectors = 0; | |
5814 | mddev->curr_resync = 0; | |
7f7583d4 | 5815 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5816 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5817 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5818 | mddev->recovery = 0; | |
5819 | mddev->in_sync = 0; | |
f0b4f7e2 | 5820 | mddev->changed = 0; |
6177b472 | 5821 | mddev->degraded = 0; |
6177b472 | 5822 | mddev->safemode = 0; |
bd691922 | 5823 | mddev->private = NULL; |
c20c33f0 | 5824 | mddev->cluster_info = NULL; |
6177b472 N |
5825 | mddev->bitmap_info.offset = 0; |
5826 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5827 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5828 | mddev->bitmap_info.chunksize = 0; |
5829 | mddev->bitmap_info.daemon_sleep = 0; | |
5830 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 5831 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
5832 | } |
5833 | ||
fd01b88c | 5834 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5835 | { |
6b6204ee | 5836 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5837 | flush_workqueue(md_misc_wq); |
a047e125 | 5838 | if (mddev->sync_thread) { |
a047e125 | 5839 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5840 | md_reap_sync_thread(mddev); |
a047e125 N |
5841 | } |
5842 | ||
5843 | del_timer_sync(&mddev->safemode_timer); | |
5844 | ||
034e33f5 SL |
5845 | if (mddev->pers && mddev->pers->quiesce) { |
5846 | mddev->pers->quiesce(mddev, 1); | |
5847 | mddev->pers->quiesce(mddev, 0); | |
5848 | } | |
e64e4018 | 5849 | md_bitmap_flush(mddev); |
a047e125 | 5850 | |
b6d428c6 | 5851 | if (mddev->ro == 0 && |
28c1b9fd | 5852 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 5853 | mddev->sb_flags)) { |
a047e125 | 5854 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5855 | if (!mddev_is_clustered(mddev)) |
5856 | mddev->in_sync = 1; | |
a047e125 N |
5857 | md_update_sb(mddev, 1); |
5858 | } | |
5859 | } | |
defad61a | 5860 | |
fd01b88c | 5861 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5862 | { |
29f097c4 | 5863 | mddev_lock_nointr(mddev); |
defad61a N |
5864 | __md_stop_writes(mddev); |
5865 | mddev_unlock(mddev); | |
5866 | } | |
390ee602 | 5867 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 5868 | |
5aa61f42 N |
5869 | static void mddev_detach(struct mddev *mddev) |
5870 | { | |
e64e4018 | 5871 | md_bitmap_wait_behind_writes(mddev); |
36d091f4 | 5872 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
5873 | mddev->pers->quiesce(mddev, 1); |
5874 | mddev->pers->quiesce(mddev, 0); | |
5875 | } | |
5876 | md_unregister_thread(&mddev->thread); | |
5877 | if (mddev->queue) | |
5878 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
5879 | } | |
5880 | ||
5eff3c43 | 5881 | static void __md_stop(struct mddev *mddev) |
6177b472 | 5882 | { |
36d091f4 | 5883 | struct md_personality *pers = mddev->pers; |
e64e4018 | 5884 | md_bitmap_destroy(mddev); |
5aa61f42 | 5885 | mddev_detach(mddev); |
ee5d004f N |
5886 | /* Ensure ->event_work is done */ |
5887 | flush_workqueue(md_misc_wq); | |
36d091f4 | 5888 | spin_lock(&mddev->lock); |
6177b472 | 5889 | mddev->pers = NULL; |
36d091f4 N |
5890 | spin_unlock(&mddev->lock); |
5891 | pers->free(mddev, mddev->private); | |
bd691922 | 5892 | mddev->private = NULL; |
36d091f4 N |
5893 | if (pers->sync_request && mddev->to_remove == NULL) |
5894 | mddev->to_remove = &md_redundancy_group; | |
5895 | module_put(pers->owner); | |
cca9cf90 | 5896 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
5a409b4f XN |
5897 | if (mddev->flush_bio_pool) { |
5898 | mempool_destroy(mddev->flush_bio_pool); | |
5899 | mddev->flush_bio_pool = NULL; | |
5900 | } | |
5901 | if (mddev->flush_pool) { | |
5902 | mempool_destroy(mddev->flush_pool); | |
5903 | mddev->flush_pool = NULL; | |
5904 | } | |
6aaa58c9 JW |
5905 | } |
5906 | ||
5907 | void md_stop(struct mddev *mddev) | |
5908 | { | |
5909 | /* stop the array and free an attached data structures. | |
5910 | * This is called from dm-raid | |
5911 | */ | |
5912 | __md_stop(mddev); | |
afeee514 KO |
5913 | bioset_exit(&mddev->bio_set); |
5914 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
5915 | } |
5916 | ||
390ee602 | 5917 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 5918 | |
a05b7ea0 | 5919 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
5920 | { |
5921 | int err = 0; | |
30b8feb7 N |
5922 | int did_freeze = 0; |
5923 | ||
5924 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5925 | did_freeze = 1; | |
5926 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5927 | md_wakeup_thread(mddev->thread); | |
5928 | } | |
f851b60d | 5929 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5930 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5931 | if (mddev->sync_thread) |
30b8feb7 N |
5932 | /* Thread might be blocked waiting for metadata update |
5933 | * which will now never happen */ | |
5934 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5935 | |
2953079c | 5936 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 5937 | return -EBUSY; |
30b8feb7 | 5938 | mddev_unlock(mddev); |
f851b60d N |
5939 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
5940 | &mddev->recovery)); | |
88724bfa | 5941 | wait_event(mddev->sb_wait, |
2953079c | 5942 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
5943 | mddev_lock_nointr(mddev); |
5944 | ||
a4bd82d0 | 5945 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5946 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 5947 | mddev->sync_thread || |
af8d8e6f | 5948 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5949 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
5950 | if (did_freeze) { |
5951 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5952 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5953 | md_wakeup_thread(mddev->thread); |
5954 | } | |
a4bd82d0 N |
5955 | err = -EBUSY; |
5956 | goto out; | |
5957 | } | |
5958 | if (mddev->pers) { | |
defad61a | 5959 | __md_stop_writes(mddev); |
a4bd82d0 N |
5960 | |
5961 | err = -ENXIO; | |
5962 | if (mddev->ro==1) | |
5963 | goto out; | |
5964 | mddev->ro = 1; | |
5965 | set_disk_ro(mddev->gendisk, 1); | |
5966 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
5967 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
5968 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 5969 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 5970 | err = 0; |
a4bd82d0 N |
5971 | } |
5972 | out: | |
5973 | mutex_unlock(&mddev->open_mutex); | |
5974 | return err; | |
5975 | } | |
5976 | ||
9e653b63 N |
5977 | /* mode: |
5978 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
5979 | * 2 - stop but do not disassemble array |
5980 | */ | |
f72ffdd6 | 5981 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 5982 | struct block_device *bdev) |
1da177e4 | 5983 | { |
1da177e4 | 5984 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 5985 | struct md_rdev *rdev; |
30b8feb7 N |
5986 | int did_freeze = 0; |
5987 | ||
5988 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5989 | did_freeze = 1; | |
5990 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5991 | md_wakeup_thread(mddev->thread); | |
5992 | } | |
f851b60d | 5993 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5994 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5995 | if (mddev->sync_thread) |
30b8feb7 N |
5996 | /* Thread might be blocked waiting for metadata update |
5997 | * which will now never happen */ | |
5998 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5999 | |
30b8feb7 | 6000 | mddev_unlock(mddev); |
f851b60d N |
6001 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6002 | !test_bit(MD_RECOVERY_RUNNING, | |
6003 | &mddev->recovery))); | |
30b8feb7 | 6004 | mddev_lock_nointr(mddev); |
1da177e4 | 6005 | |
c8c00a69 | 6006 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6007 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6008 | mddev->sysfs_active || |
6009 | mddev->sync_thread || | |
af8d8e6f | 6010 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6011 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6012 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6013 | if (did_freeze) { |
6014 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6015 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6016 | md_wakeup_thread(mddev->thread); |
6017 | } | |
260fa034 N |
6018 | return -EBUSY; |
6019 | } | |
6e17b027 | 6020 | if (mddev->pers) { |
a4bd82d0 N |
6021 | if (mddev->ro) |
6022 | set_disk_ro(disk, 0); | |
409c57f3 | 6023 | |
defad61a | 6024 | __md_stop_writes(mddev); |
5eff3c43 | 6025 | __md_stop(mddev); |
dc3b17cc | 6026 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 6027 | |
a4bd82d0 | 6028 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6029 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6030 | |
dafb20fa | 6031 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6032 | if (rdev->raid_disk >= 0) |
6033 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6034 | |
a4bd82d0 | 6035 | set_capacity(disk, 0); |
6e17b027 | 6036 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6037 | mddev->changed = 1; |
a4bd82d0 | 6038 | revalidate_disk(disk); |
0d4ca600 | 6039 | |
a4bd82d0 N |
6040 | if (mddev->ro) |
6041 | mddev->ro = 0; | |
6e17b027 N |
6042 | } else |
6043 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6044 | /* |
6045 | * Free resources if final stop | |
6046 | */ | |
9e653b63 | 6047 | if (mode == 0) { |
9d48739e | 6048 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6049 | |
c3d9714e | 6050 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6051 | struct file *f = mddev->bitmap_info.file; |
6052 | spin_lock(&mddev->lock); | |
c3d9714e | 6053 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6054 | spin_unlock(&mddev->lock); |
6055 | fput(f); | |
978f946b | 6056 | } |
c3d9714e | 6057 | mddev->bitmap_info.offset = 0; |
978f946b | 6058 | |
1da177e4 LT |
6059 | export_array(mddev); |
6060 | ||
6177b472 | 6061 | md_clean(mddev); |
efeb53c0 N |
6062 | if (mddev->hold_active == UNTIL_STOP) |
6063 | mddev->hold_active = 0; | |
a4bd82d0 | 6064 | } |
d7603b7e | 6065 | md_new_event(mddev); |
00bcb4ac | 6066 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6067 | return 0; |
1da177e4 LT |
6068 | } |
6069 | ||
fdee8ae4 | 6070 | #ifndef MODULE |
fd01b88c | 6071 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6072 | { |
3cb03002 | 6073 | struct md_rdev *rdev; |
1da177e4 LT |
6074 | int err; |
6075 | ||
a757e64c | 6076 | if (list_empty(&mddev->disks)) |
1da177e4 | 6077 | return; |
1da177e4 | 6078 | |
9d48739e | 6079 | pr_info("md: running: "); |
1da177e4 | 6080 | |
dafb20fa | 6081 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6082 | char b[BDEVNAME_SIZE]; |
9d48739e | 6083 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6084 | } |
9d48739e | 6085 | pr_cont("\n"); |
1da177e4 | 6086 | |
d710e138 | 6087 | err = do_md_run(mddev); |
1da177e4 | 6088 | if (err) { |
9d48739e | 6089 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6090 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6091 | } |
6092 | } | |
6093 | ||
6094 | /* | |
6095 | * lets try to run arrays based on all disks that have arrived | |
6096 | * until now. (those are in pending_raid_disks) | |
6097 | * | |
6098 | * the method: pick the first pending disk, collect all disks with | |
6099 | * the same UUID, remove all from the pending list and put them into | |
6100 | * the 'same_array' list. Then order this list based on superblock | |
6101 | * update time (freshest comes first), kick out 'old' disks and | |
6102 | * compare superblocks. If everything's fine then run it. | |
6103 | * | |
6104 | * If "unit" is allocated, then bump its reference count | |
6105 | */ | |
6106 | static void autorun_devices(int part) | |
6107 | { | |
3cb03002 | 6108 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6109 | struct mddev *mddev; |
1da177e4 LT |
6110 | char b[BDEVNAME_SIZE]; |
6111 | ||
9d48739e | 6112 | pr_info("md: autorun ...\n"); |
1da177e4 | 6113 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6114 | int unit; |
1da177e4 | 6115 | dev_t dev; |
ad01c9e3 | 6116 | LIST_HEAD(candidates); |
1da177e4 | 6117 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6118 | struct md_rdev, same_set); |
1da177e4 | 6119 | |
9d48739e | 6120 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6121 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6122 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6123 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6124 | pr_debug("md: adding %s ...\n", |
6125 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6126 | list_move(&rdev->same_set, &candidates); |
6127 | } | |
6128 | /* | |
6129 | * now we have a set of devices, with all of them having | |
6130 | * mostly sane superblocks. It's time to allocate the | |
6131 | * mddev. | |
6132 | */ | |
e8703fe1 N |
6133 | if (part) { |
6134 | dev = MKDEV(mdp_major, | |
6135 | rdev0->preferred_minor << MdpMinorShift); | |
6136 | unit = MINOR(dev) >> MdpMinorShift; | |
6137 | } else { | |
6138 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6139 | unit = MINOR(dev); | |
6140 | } | |
6141 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6142 | pr_warn("md: unit number in %s is bad: %d\n", |
6143 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6144 | break; |
6145 | } | |
1da177e4 LT |
6146 | |
6147 | md_probe(dev, NULL, NULL); | |
6148 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6149 | if (!mddev || !mddev->gendisk) { |
6150 | if (mddev) | |
6151 | mddev_put(mddev); | |
1da177e4 LT |
6152 | break; |
6153 | } | |
f72ffdd6 | 6154 | if (mddev_lock(mddev)) |
9d48739e | 6155 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6156 | else if (mddev->raid_disks || mddev->major_version |
6157 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6158 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6159 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6160 | mddev_unlock(mddev); | |
6161 | } else { | |
9d48739e | 6162 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6163 | mddev->persistent = 1; |
159ec1fc | 6164 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6165 | list_del_init(&rdev->same_set); |
6166 | if (bind_rdev_to_array(rdev, mddev)) | |
6167 | export_rdev(rdev); | |
6168 | } | |
6169 | autorun_array(mddev); | |
6170 | mddev_unlock(mddev); | |
6171 | } | |
6172 | /* on success, candidates will be empty, on error | |
6173 | * it won't... | |
6174 | */ | |
159ec1fc | 6175 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6176 | list_del_init(&rdev->same_set); |
1da177e4 | 6177 | export_rdev(rdev); |
4b80991c | 6178 | } |
1da177e4 LT |
6179 | mddev_put(mddev); |
6180 | } | |
9d48739e | 6181 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6182 | } |
fdee8ae4 | 6183 | #endif /* !MODULE */ |
1da177e4 | 6184 | |
f72ffdd6 | 6185 | static int get_version(void __user *arg) |
1da177e4 LT |
6186 | { |
6187 | mdu_version_t ver; | |
6188 | ||
6189 | ver.major = MD_MAJOR_VERSION; | |
6190 | ver.minor = MD_MINOR_VERSION; | |
6191 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6192 | ||
6193 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6194 | return -EFAULT; | |
6195 | ||
6196 | return 0; | |
6197 | } | |
6198 | ||
f72ffdd6 | 6199 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6200 | { |
6201 | mdu_array_info_t info; | |
a9f326eb | 6202 | int nr,working,insync,failed,spare; |
3cb03002 | 6203 | struct md_rdev *rdev; |
1da177e4 | 6204 | |
1ca69c4b N |
6205 | nr = working = insync = failed = spare = 0; |
6206 | rcu_read_lock(); | |
6207 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6208 | nr++; |
b2d444d7 | 6209 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6210 | failed++; |
6211 | else { | |
6212 | working++; | |
b2d444d7 | 6213 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6214 | insync++; |
b347af81 SL |
6215 | else if (test_bit(Journal, &rdev->flags)) |
6216 | /* TODO: add journal count to md_u.h */ | |
6217 | ; | |
1da177e4 LT |
6218 | else |
6219 | spare++; | |
6220 | } | |
6221 | } | |
1ca69c4b | 6222 | rcu_read_unlock(); |
1da177e4 LT |
6223 | |
6224 | info.major_version = mddev->major_version; | |
6225 | info.minor_version = mddev->minor_version; | |
6226 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6227 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6228 | info.level = mddev->level; |
58c0fed4 AN |
6229 | info.size = mddev->dev_sectors / 2; |
6230 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6231 | info.size = -1; |
1da177e4 LT |
6232 | info.nr_disks = nr; |
6233 | info.raid_disks = mddev->raid_disks; | |
6234 | info.md_minor = mddev->md_minor; | |
6235 | info.not_persistent= !mddev->persistent; | |
6236 | ||
9ebc6ef1 | 6237 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6238 | info.state = 0; |
6239 | if (mddev->in_sync) | |
6240 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6241 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6242 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6243 | if (mddev_is_clustered(mddev)) |
6244 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6245 | info.active_disks = insync; |
1da177e4 LT |
6246 | info.working_disks = working; |
6247 | info.failed_disks = failed; | |
6248 | info.spare_disks = spare; | |
6249 | ||
6250 | info.layout = mddev->layout; | |
9d8f0363 | 6251 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6252 | |
6253 | if (copy_to_user(arg, &info, sizeof(info))) | |
6254 | return -EFAULT; | |
6255 | ||
6256 | return 0; | |
6257 | } | |
6258 | ||
f72ffdd6 | 6259 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6260 | { |
6261 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6262 | char *ptr; |
4af1a041 | 6263 | int err; |
32a7627c | 6264 | |
b6878d9e | 6265 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6266 | if (!file) |
4af1a041 | 6267 | return -ENOMEM; |
32a7627c | 6268 | |
4af1a041 N |
6269 | err = 0; |
6270 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6271 | /* bitmap enabled */ |
6272 | if (mddev->bitmap_info.file) { | |
6273 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6274 | sizeof(file->pathname)); | |
6275 | if (IS_ERR(ptr)) | |
6276 | err = PTR_ERR(ptr); | |
6277 | else | |
6278 | memmove(file->pathname, ptr, | |
6279 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6280 | } | |
4af1a041 | 6281 | spin_unlock(&mddev->lock); |
32a7627c | 6282 | |
4af1a041 N |
6283 | if (err == 0 && |
6284 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6285 | err = -EFAULT; |
4af1a041 | 6286 | |
32a7627c N |
6287 | kfree(file); |
6288 | return err; | |
6289 | } | |
6290 | ||
f72ffdd6 | 6291 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6292 | { |
6293 | mdu_disk_info_t info; | |
3cb03002 | 6294 | struct md_rdev *rdev; |
1da177e4 LT |
6295 | |
6296 | if (copy_from_user(&info, arg, sizeof(info))) | |
6297 | return -EFAULT; | |
6298 | ||
1ca69c4b | 6299 | rcu_read_lock(); |
57d051dc | 6300 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6301 | if (rdev) { |
6302 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6303 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6304 | info.raid_disk = rdev->raid_disk; | |
6305 | info.state = 0; | |
b2d444d7 | 6306 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6307 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6308 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6309 | info.state |= (1<<MD_DISK_ACTIVE); |
6310 | info.state |= (1<<MD_DISK_SYNC); | |
6311 | } | |
9efdca16 | 6312 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6313 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6314 | if (test_bit(WriteMostly, &rdev->flags)) |
6315 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6316 | if (test_bit(FailFast, &rdev->flags)) |
6317 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6318 | } else { |
6319 | info.major = info.minor = 0; | |
6320 | info.raid_disk = -1; | |
6321 | info.state = (1<<MD_DISK_REMOVED); | |
6322 | } | |
1ca69c4b | 6323 | rcu_read_unlock(); |
1da177e4 LT |
6324 | |
6325 | if (copy_to_user(arg, &info, sizeof(info))) | |
6326 | return -EFAULT; | |
6327 | ||
6328 | return 0; | |
6329 | } | |
6330 | ||
f72ffdd6 | 6331 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6332 | { |
6333 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6334 | struct md_rdev *rdev; |
1da177e4 LT |
6335 | dev_t dev = MKDEV(info->major,info->minor); |
6336 | ||
1aee41f6 GR |
6337 | if (mddev_is_clustered(mddev) && |
6338 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6339 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6340 | mdname(mddev)); | |
1aee41f6 GR |
6341 | return -EINVAL; |
6342 | } | |
6343 | ||
1da177e4 LT |
6344 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6345 | return -EOVERFLOW; | |
6346 | ||
6347 | if (!mddev->raid_disks) { | |
6348 | int err; | |
6349 | /* expecting a device which has a superblock */ | |
6350 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6351 | if (IS_ERR(rdev)) { | |
9d48739e | 6352 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6353 | PTR_ERR(rdev)); |
6354 | return PTR_ERR(rdev); | |
6355 | } | |
6356 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6357 | struct md_rdev *rdev0 |
6358 | = list_entry(mddev->disks.next, | |
6359 | struct md_rdev, same_set); | |
a9f326eb | 6360 | err = super_types[mddev->major_version] |
1da177e4 LT |
6361 | .load_super(rdev, rdev0, mddev->minor_version); |
6362 | if (err < 0) { | |
9d48739e | 6363 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6364 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6365 | bdevname(rdev0->bdev,b2)); |
6366 | export_rdev(rdev); | |
6367 | return -EINVAL; | |
6368 | } | |
6369 | } | |
6370 | err = bind_rdev_to_array(rdev, mddev); | |
6371 | if (err) | |
6372 | export_rdev(rdev); | |
6373 | return err; | |
6374 | } | |
6375 | ||
6376 | /* | |
6377 | * add_new_disk can be used once the array is assembled | |
6378 | * to add "hot spares". They must already have a superblock | |
6379 | * written | |
6380 | */ | |
6381 | if (mddev->pers) { | |
6382 | int err; | |
6383 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6384 | pr_warn("%s: personality does not support diskops!\n", |
6385 | mdname(mddev)); | |
1da177e4 LT |
6386 | return -EINVAL; |
6387 | } | |
7b1e35f6 N |
6388 | if (mddev->persistent) |
6389 | rdev = md_import_device(dev, mddev->major_version, | |
6390 | mddev->minor_version); | |
6391 | else | |
6392 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6393 | if (IS_ERR(rdev)) { |
9d48739e | 6394 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6395 | PTR_ERR(rdev)); |
6396 | return PTR_ERR(rdev); | |
6397 | } | |
1a855a06 | 6398 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6399 | if (!mddev->persistent) { |
6400 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6401 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6402 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6403 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6404 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6405 | } else |
41158c7e | 6406 | rdev->raid_disk = -1; |
f466722c | 6407 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6408 | } else |
6409 | super_types[mddev->major_version]. | |
6410 | validate_super(mddev, rdev); | |
bedd86b7 | 6411 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6412 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6413 | /* This was a hot-add request, but events doesn't |
6414 | * match, so reject it. | |
6415 | */ | |
6416 | export_rdev(rdev); | |
6417 | return -EINVAL; | |
6418 | } | |
6419 | ||
b2d444d7 | 6420 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6421 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6422 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6423 | else |
6424 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6425 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6426 | set_bit(FailFast, &rdev->flags); | |
6427 | else | |
6428 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6429 | |
f6b6ec5c SL |
6430 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6431 | struct md_rdev *rdev2; | |
6432 | bool has_journal = false; | |
6433 | ||
6434 | /* make sure no existing journal disk */ | |
6435 | rdev_for_each(rdev2, mddev) { | |
6436 | if (test_bit(Journal, &rdev2->flags)) { | |
6437 | has_journal = true; | |
6438 | break; | |
6439 | } | |
6440 | } | |
230b55fa | 6441 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6442 | export_rdev(rdev); |
6443 | return -EBUSY; | |
6444 | } | |
bac624f3 | 6445 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6446 | } |
1aee41f6 GR |
6447 | /* |
6448 | * check whether the device shows up in other nodes | |
6449 | */ | |
6450 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6451 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6452 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6453 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6454 | /* --add initiated by this node */ |
dbb64f86 | 6455 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6456 | if (err) { |
1aee41f6 GR |
6457 | export_rdev(rdev); |
6458 | return err; | |
6459 | } | |
6460 | } | |
6461 | } | |
6462 | ||
1da177e4 LT |
6463 | rdev->raid_disk = -1; |
6464 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6465 | |
1da177e4 LT |
6466 | if (err) |
6467 | export_rdev(rdev); | |
dbb64f86 GR |
6468 | |
6469 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6470 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6471 | if (!err) { | |
6472 | err = md_cluster_ops->new_disk_ack(mddev, | |
6473 | err == 0); | |
6474 | if (err) | |
6475 | md_kick_rdev_from_array(rdev); | |
6476 | } | |
6477 | } else { | |
dbb64f86 GR |
6478 | if (err) |
6479 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6480 | else | |
6481 | err = add_bound_rdev(rdev); | |
6482 | } | |
6483 | ||
6484 | } else if (!err) | |
a6da4ef8 | 6485 | err = add_bound_rdev(rdev); |
dbb64f86 | 6486 | |
1da177e4 LT |
6487 | return err; |
6488 | } | |
6489 | ||
6490 | /* otherwise, add_new_disk is only allowed | |
6491 | * for major_version==0 superblocks | |
6492 | */ | |
6493 | if (mddev->major_version != 0) { | |
9d48739e | 6494 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6495 | return -EINVAL; |
6496 | } | |
6497 | ||
6498 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6499 | int err; | |
d710e138 | 6500 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6501 | if (IS_ERR(rdev)) { |
9d48739e | 6502 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6503 | PTR_ERR(rdev)); |
6504 | return PTR_ERR(rdev); | |
6505 | } | |
6506 | rdev->desc_nr = info->number; | |
6507 | if (info->raid_disk < mddev->raid_disks) | |
6508 | rdev->raid_disk = info->raid_disk; | |
6509 | else | |
6510 | rdev->raid_disk = -1; | |
6511 | ||
1da177e4 | 6512 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6513 | if (info->state & (1<<MD_DISK_SYNC)) |
6514 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6515 | |
8ddf9efe N |
6516 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6517 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6518 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6519 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6520 | |
1da177e4 | 6521 | if (!mddev->persistent) { |
9d48739e | 6522 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6523 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6524 | } else | |
57b2caa3 | 6525 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6526 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6527 | |
2bf071bf N |
6528 | err = bind_rdev_to_array(rdev, mddev); |
6529 | if (err) { | |
6530 | export_rdev(rdev); | |
6531 | return err; | |
6532 | } | |
1da177e4 LT |
6533 | } |
6534 | ||
6535 | return 0; | |
6536 | } | |
6537 | ||
f72ffdd6 | 6538 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6539 | { |
6540 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6541 | struct md_rdev *rdev; |
1da177e4 | 6542 | |
c42a0e26 YY |
6543 | if (!mddev->pers) |
6544 | return -ENODEV; | |
6545 | ||
1da177e4 LT |
6546 | rdev = find_rdev(mddev, dev); |
6547 | if (!rdev) | |
6548 | return -ENXIO; | |
6549 | ||
2910ff17 GR |
6550 | if (rdev->raid_disk < 0) |
6551 | goto kick_rdev; | |
293467aa | 6552 | |
3ea8929d N |
6553 | clear_bit(Blocked, &rdev->flags); |
6554 | remove_and_add_spares(mddev, rdev); | |
6555 | ||
1da177e4 LT |
6556 | if (rdev->raid_disk >= 0) |
6557 | goto busy; | |
6558 | ||
2910ff17 | 6559 | kick_rdev: |
54a88392 | 6560 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6561 | md_cluster_ops->remove_disk(mddev, rdev); |
6562 | ||
fb56dfef | 6563 | md_kick_rdev_from_array(rdev); |
2953079c | 6564 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6565 | if (mddev->thread) |
6566 | md_wakeup_thread(mddev->thread); | |
6567 | else | |
6568 | md_update_sb(mddev, 1); | |
d7603b7e | 6569 | md_new_event(mddev); |
1da177e4 LT |
6570 | |
6571 | return 0; | |
6572 | busy: | |
9d48739e N |
6573 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6574 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6575 | return -EBUSY; |
6576 | } | |
6577 | ||
f72ffdd6 | 6578 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6579 | { |
6580 | char b[BDEVNAME_SIZE]; | |
6581 | int err; | |
3cb03002 | 6582 | struct md_rdev *rdev; |
1da177e4 LT |
6583 | |
6584 | if (!mddev->pers) | |
6585 | return -ENODEV; | |
6586 | ||
6587 | if (mddev->major_version != 0) { | |
9d48739e | 6588 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6589 | mdname(mddev)); |
6590 | return -EINVAL; | |
6591 | } | |
6592 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6593 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6594 | mdname(mddev)); |
6595 | return -EINVAL; | |
6596 | } | |
6597 | ||
d710e138 | 6598 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6599 | if (IS_ERR(rdev)) { |
9d48739e | 6600 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6601 | PTR_ERR(rdev)); |
6602 | return -EINVAL; | |
6603 | } | |
6604 | ||
6605 | if (mddev->persistent) | |
57b2caa3 | 6606 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6607 | else |
77304d2a | 6608 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6609 | |
8190e754 | 6610 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6611 | |
b2d444d7 | 6612 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6613 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6614 | bdevname(rdev->bdev,b), mdname(mddev)); |
6615 | err = -EINVAL; | |
6616 | goto abort_export; | |
6617 | } | |
293467aa | 6618 | |
b2d444d7 | 6619 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6620 | rdev->desc_nr = -1; |
5842730d | 6621 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6622 | err = bind_rdev_to_array(rdev, mddev); |
6623 | if (err) | |
2aa82191 | 6624 | goto abort_export; |
1da177e4 LT |
6625 | |
6626 | /* | |
6627 | * The rest should better be atomic, we can have disk failures | |
6628 | * noticed in interrupt contexts ... | |
6629 | */ | |
6630 | ||
1da177e4 LT |
6631 | rdev->raid_disk = -1; |
6632 | ||
2953079c | 6633 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6634 | if (!mddev->thread) |
6635 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6636 | /* |
6637 | * Kick recovery, maybe this spare has to be added to the | |
6638 | * array immediately. | |
6639 | */ | |
6640 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6641 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6642 | md_new_event(mddev); |
1da177e4 LT |
6643 | return 0; |
6644 | ||
1da177e4 LT |
6645 | abort_export: |
6646 | export_rdev(rdev); | |
6647 | return err; | |
6648 | } | |
6649 | ||
fd01b88c | 6650 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6651 | { |
035328c2 | 6652 | int err = 0; |
32a7627c | 6653 | |
36fa3063 | 6654 | if (mddev->pers) { |
d66b1b39 | 6655 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6656 | return -EBUSY; |
6657 | if (mddev->recovery || mddev->sync_thread) | |
6658 | return -EBUSY; | |
6659 | /* we should be able to change the bitmap.. */ | |
6660 | } | |
32a7627c | 6661 | |
36fa3063 | 6662 | if (fd >= 0) { |
035328c2 | 6663 | struct inode *inode; |
1e594bb2 N |
6664 | struct file *f; |
6665 | ||
6666 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6667 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6668 | f = fget(fd); |
32a7627c | 6669 | |
1e594bb2 | 6670 | if (f == NULL) { |
9d48739e N |
6671 | pr_warn("%s: error: failed to get bitmap file\n", |
6672 | mdname(mddev)); | |
36fa3063 N |
6673 | return -EBADF; |
6674 | } | |
6675 | ||
1e594bb2 | 6676 | inode = f->f_mapping->host; |
035328c2 | 6677 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6678 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6679 | mdname(mddev)); | |
035328c2 | 6680 | err = -EBADF; |
1e594bb2 | 6681 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6682 | pr_warn("%s: error: bitmap file must open for write\n", |
6683 | mdname(mddev)); | |
035328c2 N |
6684 | err = -EBADF; |
6685 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6686 | pr_warn("%s: error: bitmap file is already in use\n", |
6687 | mdname(mddev)); | |
035328c2 N |
6688 | err = -EBUSY; |
6689 | } | |
6690 | if (err) { | |
1e594bb2 | 6691 | fput(f); |
36fa3063 N |
6692 | return err; |
6693 | } | |
1e594bb2 | 6694 | mddev->bitmap_info.file = f; |
c3d9714e | 6695 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6696 | } else if (mddev->bitmap == NULL) |
6697 | return -ENOENT; /* cannot remove what isn't there */ | |
6698 | err = 0; | |
6699 | if (mddev->pers) { | |
69e51b44 | 6700 | if (fd >= 0) { |
f9209a32 GR |
6701 | struct bitmap *bitmap; |
6702 | ||
e64e4018 | 6703 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 6704 | mddev_suspend(mddev); |
f9209a32 GR |
6705 | if (!IS_ERR(bitmap)) { |
6706 | mddev->bitmap = bitmap; | |
e64e4018 | 6707 | err = md_bitmap_load(mddev); |
ba599aca N |
6708 | } else |
6709 | err = PTR_ERR(bitmap); | |
52a0d49d | 6710 | if (err) { |
e64e4018 | 6711 | md_bitmap_destroy(mddev); |
52a0d49d N |
6712 | fd = -1; |
6713 | } | |
9e1cc0a5 | 6714 | mddev_resume(mddev); |
52a0d49d | 6715 | } else if (fd < 0) { |
9e1cc0a5 | 6716 | mddev_suspend(mddev); |
e64e4018 | 6717 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 6718 | mddev_resume(mddev); |
d7375ab3 | 6719 | } |
d7375ab3 N |
6720 | } |
6721 | if (fd < 0) { | |
4af1a041 N |
6722 | struct file *f = mddev->bitmap_info.file; |
6723 | if (f) { | |
6724 | spin_lock(&mddev->lock); | |
6725 | mddev->bitmap_info.file = NULL; | |
6726 | spin_unlock(&mddev->lock); | |
6727 | fput(f); | |
6728 | } | |
36fa3063 N |
6729 | } |
6730 | ||
32a7627c N |
6731 | return err; |
6732 | } | |
6733 | ||
1da177e4 LT |
6734 | /* |
6735 | * set_array_info is used two different ways | |
6736 | * The original usage is when creating a new array. | |
6737 | * In this usage, raid_disks is > 0 and it together with | |
6738 | * level, size, not_persistent,layout,chunksize determine the | |
6739 | * shape of the array. | |
6740 | * This will always create an array with a type-0.90.0 superblock. | |
6741 | * The newer usage is when assembling an array. | |
6742 | * In this case raid_disks will be 0, and the major_version field is | |
6743 | * use to determine which style super-blocks are to be found on the devices. | |
6744 | * The minor and patch _version numbers are also kept incase the | |
6745 | * super_block handler wishes to interpret them. | |
6746 | */ | |
f72ffdd6 | 6747 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6748 | { |
6749 | ||
6750 | if (info->raid_disks == 0) { | |
6751 | /* just setting version number for superblock loading */ | |
6752 | if (info->major_version < 0 || | |
50511da3 | 6753 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6754 | super_types[info->major_version].name == NULL) { |
6755 | /* maybe try to auto-load a module? */ | |
9d48739e | 6756 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6757 | info->major_version); |
6758 | return -EINVAL; | |
6759 | } | |
6760 | mddev->major_version = info->major_version; | |
6761 | mddev->minor_version = info->minor_version; | |
6762 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6763 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6764 | /* ensure mddev_put doesn't delete this now that there |
6765 | * is some minimal configuration. | |
6766 | */ | |
9ebc6ef1 | 6767 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6768 | return 0; |
6769 | } | |
6770 | mddev->major_version = MD_MAJOR_VERSION; | |
6771 | mddev->minor_version = MD_MINOR_VERSION; | |
6772 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6773 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6774 | |
6775 | mddev->level = info->level; | |
17115e03 | 6776 | mddev->clevel[0] = 0; |
58c0fed4 | 6777 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6778 | mddev->raid_disks = info->raid_disks; |
6779 | /* don't set md_minor, it is determined by which /dev/md* was | |
6780 | * openned | |
6781 | */ | |
6782 | if (info->state & (1<<MD_SB_CLEAN)) | |
6783 | mddev->recovery_cp = MaxSector; | |
6784 | else | |
6785 | mddev->recovery_cp = 0; | |
6786 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6787 | mddev->external = 0; |
1da177e4 LT |
6788 | |
6789 | mddev->layout = info->layout; | |
9d8f0363 | 6790 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 6791 | |
2953079c | 6792 | if (mddev->persistent) { |
1b3bae49 N |
6793 | mddev->max_disks = MD_SB_DISKS; |
6794 | mddev->flags = 0; | |
6795 | mddev->sb_flags = 0; | |
2953079c SL |
6796 | } |
6797 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6798 | |
c3d9714e | 6799 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6800 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6801 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6802 | |
f6705578 N |
6803 | mddev->reshape_position = MaxSector; |
6804 | ||
1da177e4 LT |
6805 | /* |
6806 | * Generate a 128 bit UUID | |
6807 | */ | |
6808 | get_random_bytes(mddev->uuid, 16); | |
6809 | ||
f6705578 | 6810 | mddev->new_level = mddev->level; |
664e7c41 | 6811 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6812 | mddev->new_layout = mddev->layout; |
6813 | mddev->delta_disks = 0; | |
2c810cdd | 6814 | mddev->reshape_backwards = 0; |
f6705578 | 6815 | |
1da177e4 LT |
6816 | return 0; |
6817 | } | |
6818 | ||
fd01b88c | 6819 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6820 | { |
efa4b77b | 6821 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
6822 | |
6823 | if (mddev->external_size) | |
6824 | return; | |
6825 | ||
1f403624 DW |
6826 | mddev->array_sectors = array_sectors; |
6827 | } | |
6828 | EXPORT_SYMBOL(md_set_array_sectors); | |
6829 | ||
fd01b88c | 6830 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6831 | { |
3cb03002 | 6832 | struct md_rdev *rdev; |
a35b0d69 | 6833 | int rv; |
d71f9f88 | 6834 | int fit = (num_sectors == 0); |
818da59f | 6835 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 6836 | |
a35b0d69 N |
6837 | if (mddev->pers->resize == NULL) |
6838 | return -EINVAL; | |
d71f9f88 AN |
6839 | /* The "num_sectors" is the number of sectors of each device that |
6840 | * is used. This can only make sense for arrays with redundancy. | |
6841 | * linear and raid0 always use whatever space is available. We can only | |
6842 | * consider changing this number if no resync or reconstruction is | |
6843 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6844 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6845 | * of each device. If num_sectors is zero, we find the largest size |
6846 | * that fits. | |
a35b0d69 | 6847 | */ |
f851b60d N |
6848 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6849 | mddev->sync_thread) | |
a35b0d69 | 6850 | return -EBUSY; |
bd8839e0 N |
6851 | if (mddev->ro) |
6852 | return -EROFS; | |
a4a6125a | 6853 | |
dafb20fa | 6854 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6855 | sector_t avail = rdev->sectors; |
01ab5662 | 6856 | |
d71f9f88 AN |
6857 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6858 | num_sectors = avail; | |
6859 | if (avail < num_sectors) | |
a35b0d69 N |
6860 | return -ENOSPC; |
6861 | } | |
d71f9f88 | 6862 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 6863 | if (!rv) { |
818da59f GJ |
6864 | if (mddev_is_clustered(mddev)) |
6865 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
6866 | else if (mddev->queue) { | |
c9483634 GJ |
6867 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6868 | revalidate_disk(mddev->gendisk); | |
6869 | } | |
6870 | } | |
a35b0d69 N |
6871 | return rv; |
6872 | } | |
6873 | ||
fd01b88c | 6874 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
6875 | { |
6876 | int rv; | |
c6563a8c | 6877 | struct md_rdev *rdev; |
da943b99 | 6878 | /* change the number of raid disks */ |
63c70c4f | 6879 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 6880 | return -EINVAL; |
bd8839e0 N |
6881 | if (mddev->ro) |
6882 | return -EROFS; | |
da943b99 | 6883 | if (raid_disks <= 0 || |
233fca36 | 6884 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 6885 | return -EINVAL; |
f851b60d N |
6886 | if (mddev->sync_thread || |
6887 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
6888 | mddev->reshape_position != MaxSector) | |
da943b99 | 6889 | return -EBUSY; |
c6563a8c N |
6890 | |
6891 | rdev_for_each(rdev, mddev) { | |
6892 | if (mddev->raid_disks < raid_disks && | |
6893 | rdev->data_offset < rdev->new_data_offset) | |
6894 | return -EINVAL; | |
6895 | if (mddev->raid_disks > raid_disks && | |
6896 | rdev->data_offset > rdev->new_data_offset) | |
6897 | return -EINVAL; | |
6898 | } | |
6899 | ||
63c70c4f | 6900 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
6901 | if (mddev->delta_disks < 0) |
6902 | mddev->reshape_backwards = 1; | |
6903 | else if (mddev->delta_disks > 0) | |
6904 | mddev->reshape_backwards = 0; | |
63c70c4f N |
6905 | |
6906 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 6907 | if (rv < 0) { |
de171cb9 | 6908 | mddev->delta_disks = 0; |
2c810cdd N |
6909 | mddev->reshape_backwards = 0; |
6910 | } | |
da943b99 N |
6911 | return rv; |
6912 | } | |
6913 | ||
1da177e4 LT |
6914 | /* |
6915 | * update_array_info is used to change the configuration of an | |
6916 | * on-line array. | |
6917 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
6918 | * fields in the info are checked against the array. | |
6919 | * Any differences that cannot be handled will cause an error. | |
6920 | * Normally, only one change can be managed at a time. | |
6921 | */ | |
fd01b88c | 6922 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6923 | { |
6924 | int rv = 0; | |
6925 | int cnt = 0; | |
36fa3063 N |
6926 | int state = 0; |
6927 | ||
6928 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 6929 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 6930 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
6931 | |
6932 | if (mddev->major_version != info->major_version || | |
6933 | mddev->minor_version != info->minor_version || | |
6934 | /* mddev->patch_version != info->patch_version || */ | |
6935 | mddev->ctime != info->ctime || | |
6936 | mddev->level != info->level || | |
6937 | /* mddev->layout != info->layout || */ | |
4e023612 | 6938 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 6939 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
6940 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
6941 | ((state^info->state) & 0xfffffe00) | |
6942 | ) | |
1da177e4 LT |
6943 | return -EINVAL; |
6944 | /* Check there is only one change */ | |
58c0fed4 AN |
6945 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
6946 | cnt++; | |
6947 | if (mddev->raid_disks != info->raid_disks) | |
6948 | cnt++; | |
6949 | if (mddev->layout != info->layout) | |
6950 | cnt++; | |
6951 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
6952 | cnt++; | |
6953 | if (cnt == 0) | |
6954 | return 0; | |
6955 | if (cnt > 1) | |
6956 | return -EINVAL; | |
1da177e4 LT |
6957 | |
6958 | if (mddev->layout != info->layout) { | |
6959 | /* Change layout | |
6960 | * we don't need to do anything at the md level, the | |
6961 | * personality will take care of it all. | |
6962 | */ | |
50ac168a | 6963 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 6964 | return -EINVAL; |
597a711b N |
6965 | else { |
6966 | mddev->new_layout = info->layout; | |
50ac168a | 6967 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
6968 | if (rv) |
6969 | mddev->new_layout = mddev->layout; | |
6970 | return rv; | |
6971 | } | |
1da177e4 | 6972 | } |
58c0fed4 | 6973 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 6974 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 6975 | |
da943b99 N |
6976 | if (mddev->raid_disks != info->raid_disks) |
6977 | rv = update_raid_disks(mddev, info->raid_disks); | |
6978 | ||
36fa3063 | 6979 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
6980 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
6981 | rv = -EINVAL; | |
6982 | goto err; | |
6983 | } | |
6984 | if (mddev->recovery || mddev->sync_thread) { | |
6985 | rv = -EBUSY; | |
6986 | goto err; | |
6987 | } | |
36fa3063 | 6988 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 6989 | struct bitmap *bitmap; |
36fa3063 | 6990 | /* add the bitmap */ |
293467aa GR |
6991 | if (mddev->bitmap) { |
6992 | rv = -EEXIST; | |
6993 | goto err; | |
6994 | } | |
6995 | if (mddev->bitmap_info.default_offset == 0) { | |
6996 | rv = -EINVAL; | |
6997 | goto err; | |
6998 | } | |
c3d9714e N |
6999 | mddev->bitmap_info.offset = |
7000 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7001 | mddev->bitmap_info.space = |
7002 | mddev->bitmap_info.default_space; | |
e64e4018 | 7003 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7004 | mddev_suspend(mddev); |
f9209a32 GR |
7005 | if (!IS_ERR(bitmap)) { |
7006 | mddev->bitmap = bitmap; | |
e64e4018 | 7007 | rv = md_bitmap_load(mddev); |
ba599aca N |
7008 | } else |
7009 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7010 | if (rv) |
e64e4018 | 7011 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7012 | mddev_resume(mddev); |
36fa3063 N |
7013 | } else { |
7014 | /* remove the bitmap */ | |
293467aa GR |
7015 | if (!mddev->bitmap) { |
7016 | rv = -ENOENT; | |
7017 | goto err; | |
7018 | } | |
7019 | if (mddev->bitmap->storage.file) { | |
7020 | rv = -EINVAL; | |
7021 | goto err; | |
7022 | } | |
f6a2dc64 GJ |
7023 | if (mddev->bitmap_info.nodes) { |
7024 | /* hold PW on all the bitmap lock */ | |
7025 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7026 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7027 | rv = -EPERM; |
7028 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7029 | goto err; | |
7030 | } | |
7031 | ||
7032 | mddev->bitmap_info.nodes = 0; | |
7033 | md_cluster_ops->leave(mddev); | |
7034 | } | |
9e1cc0a5 | 7035 | mddev_suspend(mddev); |
e64e4018 | 7036 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7037 | mddev_resume(mddev); |
c3d9714e | 7038 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7039 | } |
7040 | } | |
850b2b42 | 7041 | md_update_sb(mddev, 1); |
293467aa GR |
7042 | return rv; |
7043 | err: | |
1da177e4 LT |
7044 | return rv; |
7045 | } | |
7046 | ||
fd01b88c | 7047 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7048 | { |
3cb03002 | 7049 | struct md_rdev *rdev; |
1ca69c4b | 7050 | int err = 0; |
1da177e4 LT |
7051 | |
7052 | if (mddev->pers == NULL) | |
7053 | return -ENODEV; | |
7054 | ||
1ca69c4b | 7055 | rcu_read_lock(); |
1532d9e8 | 7056 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7057 | if (!rdev) |
1ca69c4b N |
7058 | err = -ENODEV; |
7059 | else { | |
7060 | md_error(mddev, rdev); | |
7061 | if (!test_bit(Faulty, &rdev->flags)) | |
7062 | err = -EBUSY; | |
7063 | } | |
7064 | rcu_read_unlock(); | |
7065 | return err; | |
1da177e4 LT |
7066 | } |
7067 | ||
2f9618ce AN |
7068 | /* |
7069 | * We have a problem here : there is no easy way to give a CHS | |
7070 | * virtual geometry. We currently pretend that we have a 2 heads | |
7071 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7072 | * dosfs just mad... ;-) | |
7073 | */ | |
a885c8c4 CH |
7074 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7075 | { | |
fd01b88c | 7076 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7077 | |
7078 | geo->heads = 2; | |
7079 | geo->sectors = 4; | |
49ce6cea | 7080 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7081 | return 0; |
7082 | } | |
7083 | ||
cb335f88 NS |
7084 | static inline bool md_ioctl_valid(unsigned int cmd) |
7085 | { | |
7086 | switch (cmd) { | |
7087 | case ADD_NEW_DISK: | |
7088 | case BLKROSET: | |
7089 | case GET_ARRAY_INFO: | |
7090 | case GET_BITMAP_FILE: | |
7091 | case GET_DISK_INFO: | |
7092 | case HOT_ADD_DISK: | |
7093 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7094 | case RAID_AUTORUN: |
7095 | case RAID_VERSION: | |
7096 | case RESTART_ARRAY_RW: | |
7097 | case RUN_ARRAY: | |
7098 | case SET_ARRAY_INFO: | |
7099 | case SET_BITMAP_FILE: | |
7100 | case SET_DISK_FAULTY: | |
7101 | case STOP_ARRAY: | |
7102 | case STOP_ARRAY_RO: | |
1aee41f6 | 7103 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7104 | return true; |
7105 | default: | |
7106 | return false; | |
7107 | } | |
7108 | } | |
7109 | ||
a39907fa | 7110 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7111 | unsigned int cmd, unsigned long arg) |
7112 | { | |
7113 | int err = 0; | |
7114 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7115 | struct mddev *mddev = NULL; |
e2218350 | 7116 | int ro; |
065e519e | 7117 | bool did_set_md_closing = false; |
1da177e4 | 7118 | |
cb335f88 NS |
7119 | if (!md_ioctl_valid(cmd)) |
7120 | return -ENOTTY; | |
7121 | ||
506c9e44 N |
7122 | switch (cmd) { |
7123 | case RAID_VERSION: | |
7124 | case GET_ARRAY_INFO: | |
7125 | case GET_DISK_INFO: | |
7126 | break; | |
7127 | default: | |
7128 | if (!capable(CAP_SYS_ADMIN)) | |
7129 | return -EACCES; | |
7130 | } | |
1da177e4 LT |
7131 | |
7132 | /* | |
7133 | * Commands dealing with the RAID driver but not any | |
7134 | * particular array: | |
7135 | */ | |
c02c0aeb N |
7136 | switch (cmd) { |
7137 | case RAID_VERSION: | |
7138 | err = get_version(argp); | |
3adc28d8 | 7139 | goto out; |
1da177e4 | 7140 | |
1da177e4 | 7141 | #ifndef MODULE |
c02c0aeb N |
7142 | case RAID_AUTORUN: |
7143 | err = 0; | |
7144 | autostart_arrays(arg); | |
3adc28d8 | 7145 | goto out; |
1da177e4 | 7146 | #endif |
c02c0aeb | 7147 | default:; |
1da177e4 LT |
7148 | } |
7149 | ||
7150 | /* | |
7151 | * Commands creating/starting a new array: | |
7152 | */ | |
7153 | ||
a39907fa | 7154 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7155 | |
7156 | if (!mddev) { | |
7157 | BUG(); | |
3adc28d8 | 7158 | goto out; |
1da177e4 LT |
7159 | } |
7160 | ||
1ca69c4b N |
7161 | /* Some actions do not requires the mutex */ |
7162 | switch (cmd) { | |
7163 | case GET_ARRAY_INFO: | |
7164 | if (!mddev->raid_disks && !mddev->external) | |
7165 | err = -ENODEV; | |
7166 | else | |
7167 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7168 | goto out; |
1ca69c4b N |
7169 | |
7170 | case GET_DISK_INFO: | |
7171 | if (!mddev->raid_disks && !mddev->external) | |
7172 | err = -ENODEV; | |
7173 | else | |
7174 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7175 | goto out; |
1ca69c4b N |
7176 | |
7177 | case SET_DISK_FAULTY: | |
7178 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7179 | goto out; |
4af1a041 N |
7180 | |
7181 | case GET_BITMAP_FILE: | |
7182 | err = get_bitmap_file(mddev, argp); | |
7183 | goto out; | |
7184 | ||
1ca69c4b N |
7185 | } |
7186 | ||
a7a3f08d N |
7187 | if (cmd == ADD_NEW_DISK) |
7188 | /* need to ensure md_delayed_delete() has completed */ | |
7189 | flush_workqueue(md_misc_wq); | |
7190 | ||
90f5f7ad HR |
7191 | if (cmd == HOT_REMOVE_DISK) |
7192 | /* need to ensure recovery thread has run */ | |
7193 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7194 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7195 | &mddev->recovery), |
90f5f7ad | 7196 | msecs_to_jiffies(5000)); |
260fa034 N |
7197 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7198 | /* Need to flush page cache, and ensure no-one else opens | |
7199 | * and writes | |
7200 | */ | |
7201 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7202 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7203 | mutex_unlock(&mddev->open_mutex); |
7204 | err = -EBUSY; | |
3adc28d8 | 7205 | goto out; |
260fa034 | 7206 | } |
065e519e | 7207 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7208 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7209 | did_set_md_closing = true; |
260fa034 N |
7210 | mutex_unlock(&mddev->open_mutex); |
7211 | sync_blockdev(bdev); | |
7212 | } | |
1da177e4 LT |
7213 | err = mddev_lock(mddev); |
7214 | if (err) { | |
9d48739e N |
7215 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7216 | err, cmd); | |
3adc28d8 | 7217 | goto out; |
1da177e4 LT |
7218 | } |
7219 | ||
c02c0aeb N |
7220 | if (cmd == SET_ARRAY_INFO) { |
7221 | mdu_array_info_t info; | |
7222 | if (!arg) | |
7223 | memset(&info, 0, sizeof(info)); | |
7224 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7225 | err = -EFAULT; | |
3adc28d8 | 7226 | goto unlock; |
c02c0aeb N |
7227 | } |
7228 | if (mddev->pers) { | |
7229 | err = update_array_info(mddev, &info); | |
7230 | if (err) { | |
9d48739e | 7231 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7232 | goto unlock; |
1da177e4 | 7233 | } |
3adc28d8 | 7234 | goto unlock; |
c02c0aeb N |
7235 | } |
7236 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7237 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7238 | err = -EBUSY; |
3adc28d8 | 7239 | goto unlock; |
c02c0aeb N |
7240 | } |
7241 | if (mddev->raid_disks) { | |
9d48739e | 7242 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7243 | err = -EBUSY; |
3adc28d8 | 7244 | goto unlock; |
c02c0aeb N |
7245 | } |
7246 | err = set_array_info(mddev, &info); | |
7247 | if (err) { | |
9d48739e | 7248 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7249 | goto unlock; |
c02c0aeb | 7250 | } |
3adc28d8 | 7251 | goto unlock; |
1da177e4 LT |
7252 | } |
7253 | ||
7254 | /* | |
7255 | * Commands querying/configuring an existing array: | |
7256 | */ | |
32a7627c | 7257 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7258 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7259 | if ((!mddev->raid_disks && !mddev->external) |
7260 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7261 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7262 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7263 | err = -ENODEV; |
3adc28d8 | 7264 | goto unlock; |
1da177e4 LT |
7265 | } |
7266 | ||
7267 | /* | |
7268 | * Commands even a read-only array can execute: | |
7269 | */ | |
c02c0aeb | 7270 | switch (cmd) { |
c02c0aeb N |
7271 | case RESTART_ARRAY_RW: |
7272 | err = restart_array(mddev); | |
3adc28d8 | 7273 | goto unlock; |
1da177e4 | 7274 | |
c02c0aeb N |
7275 | case STOP_ARRAY: |
7276 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7277 | goto unlock; |
1da177e4 | 7278 | |
c02c0aeb N |
7279 | case STOP_ARRAY_RO: |
7280 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7281 | goto unlock; |
1da177e4 | 7282 | |
3ea8929d N |
7283 | case HOT_REMOVE_DISK: |
7284 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7285 | goto unlock; |
3ea8929d | 7286 | |
7ceb17e8 N |
7287 | case ADD_NEW_DISK: |
7288 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7289 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7290 | * So require mddev->pers and MD_DISK_SYNC. |
7291 | */ | |
7292 | if (mddev->pers) { | |
7293 | mdu_disk_info_t info; | |
7294 | if (copy_from_user(&info, argp, sizeof(info))) | |
7295 | err = -EFAULT; | |
7296 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7297 | /* Need to clear read-only for this */ | |
7298 | break; | |
7299 | else | |
7300 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7301 | goto unlock; |
7ceb17e8 N |
7302 | } |
7303 | break; | |
7304 | ||
c02c0aeb N |
7305 | case BLKROSET: |
7306 | if (get_user(ro, (int __user *)(arg))) { | |
7307 | err = -EFAULT; | |
3adc28d8 | 7308 | goto unlock; |
c02c0aeb N |
7309 | } |
7310 | err = -EINVAL; | |
e2218350 | 7311 | |
c02c0aeb N |
7312 | /* if the bdev is going readonly the value of mddev->ro |
7313 | * does not matter, no writes are coming | |
7314 | */ | |
7315 | if (ro) | |
3adc28d8 | 7316 | goto unlock; |
e2218350 | 7317 | |
c02c0aeb N |
7318 | /* are we are already prepared for writes? */ |
7319 | if (mddev->ro != 1) | |
3adc28d8 | 7320 | goto unlock; |
e2218350 | 7321 | |
c02c0aeb N |
7322 | /* transitioning to readauto need only happen for |
7323 | * arrays that call md_write_start | |
7324 | */ | |
7325 | if (mddev->pers) { | |
7326 | err = restart_array(mddev); | |
7327 | if (err == 0) { | |
7328 | mddev->ro = 2; | |
7329 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7330 | } |
c02c0aeb | 7331 | } |
3adc28d8 | 7332 | goto unlock; |
1da177e4 LT |
7333 | } |
7334 | ||
7335 | /* | |
7336 | * The remaining ioctls are changing the state of the | |
f91de92e | 7337 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7338 | */ |
326eb17d | 7339 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7340 | if (mddev->ro == 2) { |
7341 | mddev->ro = 0; | |
00bcb4ac | 7342 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7343 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7344 | /* mddev_unlock will wake thread */ |
7345 | /* If a device failed while we were read-only, we | |
7346 | * need to make sure the metadata is updated now. | |
7347 | */ | |
2953079c | 7348 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7349 | mddev_unlock(mddev); |
7350 | wait_event(mddev->sb_wait, | |
2953079c SL |
7351 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7352 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7353 | mddev_lock_nointr(mddev); |
f3378b48 | 7354 | } |
f91de92e N |
7355 | } else { |
7356 | err = -EROFS; | |
3adc28d8 | 7357 | goto unlock; |
f91de92e | 7358 | } |
1da177e4 LT |
7359 | } |
7360 | ||
c02c0aeb N |
7361 | switch (cmd) { |
7362 | case ADD_NEW_DISK: | |
1da177e4 | 7363 | { |
c02c0aeb N |
7364 | mdu_disk_info_t info; |
7365 | if (copy_from_user(&info, argp, sizeof(info))) | |
7366 | err = -EFAULT; | |
7367 | else | |
7368 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7369 | goto unlock; |
c02c0aeb | 7370 | } |
1da177e4 | 7371 | |
1aee41f6 GR |
7372 | case CLUSTERED_DISK_NACK: |
7373 | if (mddev_is_clustered(mddev)) | |
7374 | md_cluster_ops->new_disk_ack(mddev, false); | |
7375 | else | |
7376 | err = -EINVAL; | |
7377 | goto unlock; | |
7378 | ||
c02c0aeb N |
7379 | case HOT_ADD_DISK: |
7380 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7381 | goto unlock; |
1da177e4 | 7382 | |
c02c0aeb N |
7383 | case RUN_ARRAY: |
7384 | err = do_md_run(mddev); | |
3adc28d8 | 7385 | goto unlock; |
1da177e4 | 7386 | |
c02c0aeb N |
7387 | case SET_BITMAP_FILE: |
7388 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7389 | goto unlock; |
32a7627c | 7390 | |
c02c0aeb N |
7391 | default: |
7392 | err = -EINVAL; | |
3adc28d8 | 7393 | goto unlock; |
1da177e4 LT |
7394 | } |
7395 | ||
3adc28d8 | 7396 | unlock: |
d3374825 N |
7397 | if (mddev->hold_active == UNTIL_IOCTL && |
7398 | err != -EINVAL) | |
7399 | mddev->hold_active = 0; | |
1da177e4 | 7400 | mddev_unlock(mddev); |
3adc28d8 | 7401 | out: |
065e519e N |
7402 | if(did_set_md_closing) |
7403 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7404 | return err; |
7405 | } | |
aa98aa31 AB |
7406 | #ifdef CONFIG_COMPAT |
7407 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7408 | unsigned int cmd, unsigned long arg) | |
7409 | { | |
7410 | switch (cmd) { | |
7411 | case HOT_REMOVE_DISK: | |
7412 | case HOT_ADD_DISK: | |
7413 | case SET_DISK_FAULTY: | |
7414 | case SET_BITMAP_FILE: | |
7415 | /* These take in integer arg, do not convert */ | |
7416 | break; | |
7417 | default: | |
7418 | arg = (unsigned long)compat_ptr(arg); | |
7419 | break; | |
7420 | } | |
7421 | ||
7422 | return md_ioctl(bdev, mode, cmd, arg); | |
7423 | } | |
7424 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7425 | |
a39907fa | 7426 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7427 | { |
7428 | /* | |
7429 | * Succeed if we can lock the mddev, which confirms that | |
7430 | * it isn't being stopped right now. | |
7431 | */ | |
fd01b88c | 7432 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7433 | int err; |
7434 | ||
0c098220 YL |
7435 | if (!mddev) |
7436 | return -ENODEV; | |
7437 | ||
d3374825 N |
7438 | if (mddev->gendisk != bdev->bd_disk) { |
7439 | /* we are racing with mddev_put which is discarding this | |
7440 | * bd_disk. | |
7441 | */ | |
7442 | mddev_put(mddev); | |
7443 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7444 | flush_workqueue(md_misc_wq); |
d3374825 N |
7445 | /* Then retry the open from the top */ |
7446 | return -ERESTARTSYS; | |
7447 | } | |
7448 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7449 | ||
c8c00a69 | 7450 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7451 | goto out; |
7452 | ||
af8d8e6f GJ |
7453 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7454 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7455 | err = -ENODEV; |
7456 | goto out; | |
af8d8e6f GJ |
7457 | } |
7458 | ||
1da177e4 | 7459 | err = 0; |
f2ea68cf | 7460 | atomic_inc(&mddev->openers); |
c8c00a69 | 7461 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7462 | |
f0b4f7e2 | 7463 | check_disk_change(bdev); |
1da177e4 | 7464 | out: |
e2342ca8 N |
7465 | if (err) |
7466 | mddev_put(mddev); | |
1da177e4 LT |
7467 | return err; |
7468 | } | |
7469 | ||
db2a144b | 7470 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7471 | { |
f72ffdd6 | 7472 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7473 | |
52e5f9d1 | 7474 | BUG_ON(!mddev); |
f2ea68cf | 7475 | atomic_dec(&mddev->openers); |
1da177e4 | 7476 | mddev_put(mddev); |
1da177e4 | 7477 | } |
f0b4f7e2 N |
7478 | |
7479 | static int md_media_changed(struct gendisk *disk) | |
7480 | { | |
fd01b88c | 7481 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7482 | |
7483 | return mddev->changed; | |
7484 | } | |
7485 | ||
7486 | static int md_revalidate(struct gendisk *disk) | |
7487 | { | |
fd01b88c | 7488 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7489 | |
7490 | mddev->changed = 0; | |
7491 | return 0; | |
7492 | } | |
83d5cde4 | 7493 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7494 | { |
7495 | .owner = THIS_MODULE, | |
a39907fa AV |
7496 | .open = md_open, |
7497 | .release = md_release, | |
b492b852 | 7498 | .ioctl = md_ioctl, |
aa98aa31 AB |
7499 | #ifdef CONFIG_COMPAT |
7500 | .compat_ioctl = md_compat_ioctl, | |
7501 | #endif | |
a885c8c4 | 7502 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7503 | .media_changed = md_media_changed, |
7504 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7505 | }; |
7506 | ||
f72ffdd6 | 7507 | static int md_thread(void *arg) |
1da177e4 | 7508 | { |
2b8bf345 | 7509 | struct md_thread *thread = arg; |
1da177e4 | 7510 | |
1da177e4 LT |
7511 | /* |
7512 | * md_thread is a 'system-thread', it's priority should be very | |
7513 | * high. We avoid resource deadlocks individually in each | |
7514 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7515 | * the very same RT priority as kswapd, thus we will never get | |
7516 | * into a priority inversion deadlock. | |
7517 | * | |
7518 | * we definitely have to have equal or higher priority than | |
7519 | * bdflush, otherwise bdflush will deadlock if there are too | |
7520 | * many dirty RAID5 blocks. | |
7521 | */ | |
1da177e4 | 7522 | |
6985c43f | 7523 | allow_signal(SIGKILL); |
a6fb0934 | 7524 | while (!kthread_should_stop()) { |
1da177e4 | 7525 | |
93588e22 N |
7526 | /* We need to wait INTERRUPTIBLE so that |
7527 | * we don't add to the load-average. | |
7528 | * That means we need to be sure no signals are | |
7529 | * pending | |
7530 | */ | |
7531 | if (signal_pending(current)) | |
7532 | flush_signals(current); | |
7533 | ||
7534 | wait_event_interruptible_timeout | |
7535 | (thread->wqueue, | |
7536 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7537 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7538 | thread->timeout); |
1da177e4 | 7539 | |
6c987910 | 7540 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7541 | if (kthread_should_park()) |
7542 | kthread_parkme(); | |
6c987910 | 7543 | if (!kthread_should_stop()) |
4ed8731d | 7544 | thread->run(thread); |
1da177e4 | 7545 | } |
a6fb0934 | 7546 | |
1da177e4 LT |
7547 | return 0; |
7548 | } | |
7549 | ||
2b8bf345 | 7550 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7551 | { |
7552 | if (thread) { | |
36a4e1fe | 7553 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7554 | set_bit(THREAD_WAKEUP, &thread->flags); |
7555 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7556 | } |
7557 | } | |
6c144d31 | 7558 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7559 | |
4ed8731d SL |
7560 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7561 | struct mddev *mddev, const char *name) | |
1da177e4 | 7562 | { |
2b8bf345 | 7563 | struct md_thread *thread; |
1da177e4 | 7564 | |
2b8bf345 | 7565 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7566 | if (!thread) |
7567 | return NULL; | |
7568 | ||
1da177e4 LT |
7569 | init_waitqueue_head(&thread->wqueue); |
7570 | ||
1da177e4 LT |
7571 | thread->run = run; |
7572 | thread->mddev = mddev; | |
32a7627c | 7573 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7574 | thread->tsk = kthread_run(md_thread, thread, |
7575 | "%s_%s", | |
7576 | mdname(thread->mddev), | |
0232605d | 7577 | name); |
a6fb0934 | 7578 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7579 | kfree(thread); |
7580 | return NULL; | |
7581 | } | |
1da177e4 LT |
7582 | return thread; |
7583 | } | |
6c144d31 | 7584 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7585 | |
2b8bf345 | 7586 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7587 | { |
2b8bf345 | 7588 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7589 | if (!thread) |
7590 | return; | |
36a4e1fe | 7591 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7592 | /* Locking ensures that mddev_unlock does not wake_up a |
7593 | * non-existent thread | |
7594 | */ | |
7595 | spin_lock(&pers_lock); | |
7596 | *threadp = NULL; | |
7597 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7598 | |
7599 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7600 | kfree(thread); |
7601 | } | |
6c144d31 | 7602 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7603 | |
fd01b88c | 7604 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7605 | { |
b2d444d7 | 7606 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7607 | return; |
6bfe0b49 | 7608 | |
de393cde | 7609 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7610 | return; |
7611 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7612 | if (mddev->degraded) |
7613 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7614 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7615 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7616 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7617 | md_wakeup_thread(mddev->thread); | |
768a418d | 7618 | if (mddev->event_work.func) |
e804ac78 | 7619 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7620 | md_new_event(mddev); |
1da177e4 | 7621 | } |
6c144d31 | 7622 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7623 | |
7624 | /* seq_file implementation /proc/mdstat */ | |
7625 | ||
7626 | static void status_unused(struct seq_file *seq) | |
7627 | { | |
7628 | int i = 0; | |
3cb03002 | 7629 | struct md_rdev *rdev; |
1da177e4 LT |
7630 | |
7631 | seq_printf(seq, "unused devices: "); | |
7632 | ||
159ec1fc | 7633 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7634 | char b[BDEVNAME_SIZE]; |
7635 | i++; | |
7636 | seq_printf(seq, "%s ", | |
7637 | bdevname(rdev->bdev,b)); | |
7638 | } | |
7639 | if (!i) | |
7640 | seq_printf(seq, "<none>"); | |
7641 | ||
7642 | seq_printf(seq, "\n"); | |
7643 | } | |
7644 | ||
f7851be7 | 7645 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7646 | { |
dd71cf6b N |
7647 | sector_t max_sectors, resync, res; |
7648 | unsigned long dt, db; | |
7649 | sector_t rt; | |
4588b42e N |
7650 | int scale; |
7651 | unsigned int per_milli; | |
1da177e4 | 7652 | |
c804cdec N |
7653 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7654 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7655 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7656 | else |
dd71cf6b | 7657 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7658 | |
f7851be7 N |
7659 | resync = mddev->curr_resync; |
7660 | if (resync <= 3) { | |
7661 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7662 | /* Still cleaning up */ | |
7663 | resync = max_sectors; | |
d2e2ec82 ND |
7664 | } else if (resync > max_sectors) |
7665 | resync = max_sectors; | |
7666 | else | |
f7851be7 N |
7667 | resync -= atomic_read(&mddev->recovery_active); |
7668 | ||
7669 | if (resync == 0) { | |
0357ba27 GJ |
7670 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
7671 | struct md_rdev *rdev; | |
7672 | ||
7673 | rdev_for_each(rdev, mddev) | |
7674 | if (rdev->raid_disk >= 0 && | |
7675 | !test_bit(Faulty, &rdev->flags) && | |
7676 | rdev->recovery_offset != MaxSector && | |
7677 | rdev->recovery_offset) { | |
7678 | seq_printf(seq, "\trecover=REMOTE"); | |
7679 | return 1; | |
7680 | } | |
7681 | if (mddev->reshape_position != MaxSector) | |
7682 | seq_printf(seq, "\treshape=REMOTE"); | |
7683 | else | |
7684 | seq_printf(seq, "\tresync=REMOTE"); | |
7685 | return 1; | |
7686 | } | |
f7851be7 N |
7687 | if (mddev->recovery_cp < MaxSector) { |
7688 | seq_printf(seq, "\tresync=PENDING"); | |
7689 | return 1; | |
7690 | } | |
7691 | return 0; | |
7692 | } | |
7693 | if (resync < 3) { | |
7694 | seq_printf(seq, "\tresync=DELAYED"); | |
7695 | return 1; | |
7696 | } | |
7697 | ||
403df478 | 7698 | WARN_ON(max_sectors == 0); |
4588b42e | 7699 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7700 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7701 | * u32, as those are the requirements for sector_div. |
7702 | * Thus 'scale' must be at least 10 | |
7703 | */ | |
7704 | scale = 10; | |
7705 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7706 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7707 | scale++; |
7708 | } | |
7709 | res = (resync>>scale)*1000; | |
dd71cf6b | 7710 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7711 | |
7712 | per_milli = res; | |
1da177e4 | 7713 | { |
4588b42e | 7714 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7715 | seq_printf(seq, "["); |
7716 | for (i = 0; i < x; i++) | |
7717 | seq_printf(seq, "="); | |
7718 | seq_printf(seq, ">"); | |
7719 | for (i = 0; i < y; i++) | |
7720 | seq_printf(seq, "."); | |
7721 | seq_printf(seq, "] "); | |
7722 | } | |
4588b42e | 7723 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7724 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7725 | "reshape" : | |
61df9d91 N |
7726 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7727 | "check" : | |
7728 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7729 | "resync" : "recovery"))), | |
7730 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7731 | (unsigned long long) resync/2, |
7732 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7733 | |
7734 | /* | |
1da177e4 LT |
7735 | * dt: time from mark until now |
7736 | * db: blocks written from mark until now | |
7737 | * rt: remaining time | |
dd71cf6b N |
7738 | * |
7739 | * rt is a sector_t, so could be 32bit or 64bit. | |
7740 | * So we divide before multiply in case it is 32bit and close | |
7741 | * to the limit. | |
25985edc | 7742 | * We scale the divisor (db) by 32 to avoid losing precision |
dd71cf6b N |
7743 | * near the end of resync when the number of remaining sectors |
7744 | * is close to 'db'. | |
7745 | * We then divide rt by 32 after multiplying by db to compensate. | |
7746 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7747 | */ |
7748 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7749 | if (!dt) dt++; | |
ff4e8d9a N |
7750 | db = (mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active)) |
7751 | - mddev->resync_mark_cnt; | |
1da177e4 | 7752 | |
dd71cf6b N |
7753 | rt = max_sectors - resync; /* number of remaining sectors */ |
7754 | sector_div(rt, db/32+1); | |
7755 | rt *= dt; | |
7756 | rt >>= 5; | |
7757 | ||
7758 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7759 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7760 | |
ff4e8d9a | 7761 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7762 | return 1; |
1da177e4 LT |
7763 | } |
7764 | ||
7765 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7766 | { | |
7767 | struct list_head *tmp; | |
7768 | loff_t l = *pos; | |
fd01b88c | 7769 | struct mddev *mddev; |
1da177e4 LT |
7770 | |
7771 | if (l >= 0x10000) | |
7772 | return NULL; | |
7773 | if (!l--) | |
7774 | /* header */ | |
7775 | return (void*)1; | |
7776 | ||
7777 | spin_lock(&all_mddevs_lock); | |
7778 | list_for_each(tmp,&all_mddevs) | |
7779 | if (!l--) { | |
fd01b88c | 7780 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7781 | mddev_get(mddev); |
7782 | spin_unlock(&all_mddevs_lock); | |
7783 | return mddev; | |
7784 | } | |
7785 | spin_unlock(&all_mddevs_lock); | |
7786 | if (!l--) | |
7787 | return (void*)2;/* tail */ | |
7788 | return NULL; | |
7789 | } | |
7790 | ||
7791 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7792 | { | |
7793 | struct list_head *tmp; | |
fd01b88c | 7794 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7795 | |
1da177e4 LT |
7796 | ++*pos; |
7797 | if (v == (void*)2) | |
7798 | return NULL; | |
7799 | ||
7800 | spin_lock(&all_mddevs_lock); | |
7801 | if (v == (void*)1) | |
7802 | tmp = all_mddevs.next; | |
7803 | else | |
7804 | tmp = mddev->all_mddevs.next; | |
7805 | if (tmp != &all_mddevs) | |
fd01b88c | 7806 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7807 | else { |
7808 | next_mddev = (void*)2; | |
7809 | *pos = 0x10000; | |
f72ffdd6 | 7810 | } |
1da177e4 LT |
7811 | spin_unlock(&all_mddevs_lock); |
7812 | ||
7813 | if (v != (void*)1) | |
7814 | mddev_put(mddev); | |
7815 | return next_mddev; | |
7816 | ||
7817 | } | |
7818 | ||
7819 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7820 | { | |
fd01b88c | 7821 | struct mddev *mddev = v; |
1da177e4 LT |
7822 | |
7823 | if (mddev && v != (void*)1 && v != (void*)2) | |
7824 | mddev_put(mddev); | |
7825 | } | |
7826 | ||
7827 | static int md_seq_show(struct seq_file *seq, void *v) | |
7828 | { | |
fd01b88c | 7829 | struct mddev *mddev = v; |
dd8ac336 | 7830 | sector_t sectors; |
3cb03002 | 7831 | struct md_rdev *rdev; |
1da177e4 LT |
7832 | |
7833 | if (v == (void*)1) { | |
84fc4b56 | 7834 | struct md_personality *pers; |
1da177e4 LT |
7835 | seq_printf(seq, "Personalities : "); |
7836 | spin_lock(&pers_lock); | |
2604b703 N |
7837 | list_for_each_entry(pers, &pers_list, list) |
7838 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7839 | |
7840 | spin_unlock(&pers_lock); | |
7841 | seq_printf(seq, "\n"); | |
f1514638 | 7842 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7843 | return 0; |
7844 | } | |
7845 | if (v == (void*)2) { | |
7846 | status_unused(seq); | |
7847 | return 0; | |
7848 | } | |
7849 | ||
36d091f4 | 7850 | spin_lock(&mddev->lock); |
1da177e4 LT |
7851 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7852 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7853 | mddev->pers ? "" : "in"); | |
7854 | if (mddev->pers) { | |
f91de92e | 7855 | if (mddev->ro==1) |
1da177e4 | 7856 | seq_printf(seq, " (read-only)"); |
f91de92e | 7857 | if (mddev->ro==2) |
52720ae7 | 7858 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7859 | seq_printf(seq, " %s", mddev->pers->name); |
7860 | } | |
7861 | ||
dd8ac336 | 7862 | sectors = 0; |
f97fcad3 N |
7863 | rcu_read_lock(); |
7864 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
7865 | char b[BDEVNAME_SIZE]; |
7866 | seq_printf(seq, " %s[%d]", | |
7867 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
7868 | if (test_bit(WriteMostly, &rdev->flags)) |
7869 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
7870 | if (test_bit(Journal, &rdev->flags)) |
7871 | seq_printf(seq, "(J)"); | |
b2d444d7 | 7872 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
7873 | seq_printf(seq, "(F)"); |
7874 | continue; | |
2d78f8c4 N |
7875 | } |
7876 | if (rdev->raid_disk < 0) | |
b325a32e | 7877 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
7878 | if (test_bit(Replacement, &rdev->flags)) |
7879 | seq_printf(seq, "(R)"); | |
dd8ac336 | 7880 | sectors += rdev->sectors; |
1da177e4 | 7881 | } |
f97fcad3 | 7882 | rcu_read_unlock(); |
1da177e4 LT |
7883 | |
7884 | if (!list_empty(&mddev->disks)) { | |
7885 | if (mddev->pers) | |
7886 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
7887 | (unsigned long long) |
7888 | mddev->array_sectors / 2); | |
1da177e4 LT |
7889 | else |
7890 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 7891 | (unsigned long long)sectors / 2); |
1da177e4 | 7892 | } |
1cd6bf19 N |
7893 | if (mddev->persistent) { |
7894 | if (mddev->major_version != 0 || | |
7895 | mddev->minor_version != 90) { | |
7896 | seq_printf(seq," super %d.%d", | |
7897 | mddev->major_version, | |
7898 | mddev->minor_version); | |
7899 | } | |
e691063a N |
7900 | } else if (mddev->external) |
7901 | seq_printf(seq, " super external:%s", | |
7902 | mddev->metadata_type); | |
7903 | else | |
1cd6bf19 | 7904 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
7905 | |
7906 | if (mddev->pers) { | |
d710e138 | 7907 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 7908 | seq_printf(seq, "\n "); |
8e1b39d6 | 7909 | if (mddev->pers->sync_request) { |
f7851be7 | 7910 | if (status_resync(seq, mddev)) |
8e1b39d6 | 7911 | seq_printf(seq, "\n "); |
8e1b39d6 | 7912 | } |
32a7627c N |
7913 | } else |
7914 | seq_printf(seq, "\n "); | |
7915 | ||
e64e4018 | 7916 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
7917 | |
7918 | seq_printf(seq, "\n"); | |
7919 | } | |
36d091f4 | 7920 | spin_unlock(&mddev->lock); |
f72ffdd6 | 7921 | |
1da177e4 LT |
7922 | return 0; |
7923 | } | |
7924 | ||
110518bc | 7925 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
7926 | .start = md_seq_start, |
7927 | .next = md_seq_next, | |
7928 | .stop = md_seq_stop, | |
7929 | .show = md_seq_show, | |
7930 | }; | |
7931 | ||
7932 | static int md_seq_open(struct inode *inode, struct file *file) | |
7933 | { | |
f1514638 | 7934 | struct seq_file *seq; |
1da177e4 LT |
7935 | int error; |
7936 | ||
7937 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 7938 | if (error) |
f1514638 KS |
7939 | return error; |
7940 | ||
7941 | seq = file->private_data; | |
7942 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
7943 | return error; |
7944 | } | |
7945 | ||
e2f23b60 | 7946 | static int md_unloading; |
afc9a42b | 7947 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 7948 | { |
f1514638 | 7949 | struct seq_file *seq = filp->private_data; |
afc9a42b | 7950 | __poll_t mask; |
d7603b7e | 7951 | |
e2f23b60 | 7952 | if (md_unloading) |
a9a08845 | 7953 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
7954 | poll_wait(filp, &md_event_waiters, wait); |
7955 | ||
7956 | /* always allow read */ | |
a9a08845 | 7957 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 7958 | |
f1514638 | 7959 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 7960 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
7961 | return mask; |
7962 | } | |
7963 | ||
fa027c2a | 7964 | static const struct file_operations md_seq_fops = { |
e24650c2 | 7965 | .owner = THIS_MODULE, |
1da177e4 LT |
7966 | .open = md_seq_open, |
7967 | .read = seq_read, | |
7968 | .llseek = seq_lseek, | |
26e13043 | 7969 | .release = seq_release, |
d7603b7e | 7970 | .poll = mdstat_poll, |
1da177e4 LT |
7971 | }; |
7972 | ||
84fc4b56 | 7973 | int register_md_personality(struct md_personality *p) |
1da177e4 | 7974 | { |
9d48739e N |
7975 | pr_debug("md: %s personality registered for level %d\n", |
7976 | p->name, p->level); | |
1da177e4 | 7977 | spin_lock(&pers_lock); |
2604b703 | 7978 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
7979 | spin_unlock(&pers_lock); |
7980 | return 0; | |
7981 | } | |
6c144d31 | 7982 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 7983 | |
84fc4b56 | 7984 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 7985 | { |
9d48739e | 7986 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 7987 | spin_lock(&pers_lock); |
2604b703 | 7988 | list_del_init(&p->list); |
1da177e4 LT |
7989 | spin_unlock(&pers_lock); |
7990 | return 0; | |
7991 | } | |
6c144d31 | 7992 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 7993 | |
6022e75b N |
7994 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
7995 | struct module *module) | |
edb39c9d | 7996 | { |
6022e75b | 7997 | int ret = 0; |
edb39c9d | 7998 | spin_lock(&pers_lock); |
6022e75b N |
7999 | if (md_cluster_ops != NULL) |
8000 | ret = -EALREADY; | |
8001 | else { | |
8002 | md_cluster_ops = ops; | |
8003 | md_cluster_mod = module; | |
8004 | } | |
edb39c9d | 8005 | spin_unlock(&pers_lock); |
6022e75b | 8006 | return ret; |
edb39c9d GR |
8007 | } |
8008 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8009 | ||
8010 | int unregister_md_cluster_operations(void) | |
8011 | { | |
8012 | spin_lock(&pers_lock); | |
8013 | md_cluster_ops = NULL; | |
8014 | spin_unlock(&pers_lock); | |
8015 | return 0; | |
8016 | } | |
8017 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8018 | ||
8019 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8020 | { | |
47a7b0d8 GJ |
8021 | if (!md_cluster_ops) |
8022 | request_module("md-cluster"); | |
edb39c9d | 8023 | spin_lock(&pers_lock); |
47a7b0d8 | 8024 | /* ensure module won't be unloaded */ |
edb39c9d | 8025 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8026 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8027 | spin_unlock(&pers_lock); |
8028 | return -ENOENT; | |
8029 | } | |
8030 | spin_unlock(&pers_lock); | |
8031 | ||
cf921cc1 | 8032 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
8033 | } |
8034 | ||
8035 | void md_cluster_stop(struct mddev *mddev) | |
8036 | { | |
c4ce867f GR |
8037 | if (!md_cluster_ops) |
8038 | return; | |
edb39c9d GR |
8039 | md_cluster_ops->leave(mddev); |
8040 | module_put(md_cluster_mod); | |
8041 | } | |
8042 | ||
fd01b88c | 8043 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8044 | { |
f72ffdd6 | 8045 | struct md_rdev *rdev; |
1da177e4 | 8046 | int idle; |
eea1bf38 | 8047 | int curr_events; |
1da177e4 LT |
8048 | |
8049 | idle = 1; | |
4b80991c N |
8050 | rcu_read_lock(); |
8051 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8052 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
59767fbd | 8053 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8054 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8055 | /* sync IO will cause sync_io to increase before the disk_stats |
8056 | * as sync_io is counted when a request starts, and | |
8057 | * disk_stats is counted when it completes. | |
8058 | * So resync activity will cause curr_events to be smaller than | |
8059 | * when there was no such activity. | |
8060 | * non-sync IO will cause disk_stat to increase without | |
8061 | * increasing sync_io so curr_events will (eventually) | |
8062 | * be larger than it was before. Once it becomes | |
8063 | * substantially larger, the test below will cause | |
8064 | * the array to appear non-idle, and resync will slow | |
8065 | * down. | |
8066 | * If there is a lot of outstanding resync activity when | |
8067 | * we set last_event to curr_events, then all that activity | |
8068 | * completing might cause the array to appear non-idle | |
8069 | * and resync will be slowed down even though there might | |
8070 | * not have been non-resync activity. This will only | |
8071 | * happen once though. 'last_events' will soon reflect | |
8072 | * the state where there is little or no outstanding | |
8073 | * resync requests, and further resync activity will | |
8074 | * always make curr_events less than last_events. | |
c0e48521 | 8075 | * |
1da177e4 | 8076 | */ |
eea1bf38 | 8077 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8078 | rdev->last_events = curr_events; |
8079 | idle = 0; | |
8080 | } | |
8081 | } | |
4b80991c | 8082 | rcu_read_unlock(); |
1da177e4 LT |
8083 | return idle; |
8084 | } | |
8085 | ||
fd01b88c | 8086 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8087 | { |
8088 | /* another "blocks" (512byte) blocks have been synced */ | |
8089 | atomic_sub(blocks, &mddev->recovery_active); | |
8090 | wake_up(&mddev->recovery_wait); | |
8091 | if (!ok) { | |
dfc70645 | 8092 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8093 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8094 | md_wakeup_thread(mddev->thread); |
8095 | // stop recovery, signal do_sync .... | |
8096 | } | |
8097 | } | |
6c144d31 | 8098 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8099 | |
06d91a5f N |
8100 | /* md_write_start(mddev, bi) |
8101 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8102 | * in superblock) before writing, schedule a superblock update |
8103 | * and wait for it to complete. | |
cc27b0c7 N |
8104 | * A return value of 'false' means that the write wasn't recorded |
8105 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8106 | */ |
cc27b0c7 | 8107 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8108 | { |
0fd62b86 | 8109 | int did_change = 0; |
4b6c1060 | 8110 | |
06d91a5f | 8111 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8112 | return true; |
06d91a5f | 8113 | |
f91de92e N |
8114 | BUG_ON(mddev->ro == 1); |
8115 | if (mddev->ro == 2) { | |
8116 | /* need to switch to read/write */ | |
8117 | mddev->ro = 0; | |
8118 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8119 | md_wakeup_thread(mddev->thread); | |
25156198 | 8120 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8121 | did_change = 1; |
f91de92e | 8122 | } |
4ad23a97 N |
8123 | rcu_read_lock(); |
8124 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8125 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8126 | if (mddev->safemode == 1) |
8127 | mddev->safemode = 0; | |
4ad23a97 | 8128 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8129 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8130 | spin_lock(&mddev->lock); |
3d310eb7 N |
8131 | if (mddev->in_sync) { |
8132 | mddev->in_sync = 0; | |
2953079c SL |
8133 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8134 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8135 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8136 | did_change = 1; |
3d310eb7 | 8137 | } |
85572d7c | 8138 | spin_unlock(&mddev->lock); |
06d91a5f | 8139 | } |
4ad23a97 | 8140 | rcu_read_unlock(); |
0fd62b86 | 8141 | if (did_change) |
00bcb4ac | 8142 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8143 | if (!mddev->has_superblocks) |
8144 | return true; | |
09a44cc1 | 8145 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8146 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8147 | mddev->suspended); | |
cc27b0c7 N |
8148 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8149 | percpu_ref_put(&mddev->writes_pending); | |
8150 | return false; | |
8151 | } | |
8152 | return true; | |
1da177e4 | 8153 | } |
6c144d31 | 8154 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8155 | |
49728050 N |
8156 | /* md_write_inc can only be called when md_write_start() has |
8157 | * already been called at least once of the current request. | |
8158 | * It increments the counter and is useful when a single request | |
8159 | * is split into several parts. Each part causes an increment and | |
8160 | * so needs a matching md_write_end(). | |
8161 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8162 | * a spinlocked region. | |
8163 | */ | |
8164 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8165 | { | |
8166 | if (bio_data_dir(bi) != WRITE) | |
8167 | return; | |
8168 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8169 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8170 | } |
8171 | EXPORT_SYMBOL(md_write_inc); | |
8172 | ||
fd01b88c | 8173 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8174 | { |
4ad23a97 N |
8175 | percpu_ref_put(&mddev->writes_pending); |
8176 | ||
8177 | if (mddev->safemode == 2) | |
8178 | md_wakeup_thread(mddev->thread); | |
8179 | else if (mddev->safemode_delay) | |
8180 | /* The roundup() ensures this only performs locking once | |
8181 | * every ->safemode_delay jiffies | |
8182 | */ | |
8183 | mod_timer(&mddev->safemode_timer, | |
8184 | roundup(jiffies, mddev->safemode_delay) + | |
8185 | mddev->safemode_delay); | |
1da177e4 | 8186 | } |
4ad23a97 | 8187 | |
6c144d31 | 8188 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8189 | |
2a2275d6 N |
8190 | /* md_allow_write(mddev) |
8191 | * Calling this ensures that the array is marked 'active' so that writes | |
8192 | * may proceed without blocking. It is important to call this before | |
8193 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8194 | * Must be called with mddev_lock held. | |
8195 | */ | |
2214c260 | 8196 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8197 | { |
8198 | if (!mddev->pers) | |
2214c260 | 8199 | return; |
2a2275d6 | 8200 | if (mddev->ro) |
2214c260 | 8201 | return; |
1a0fd497 | 8202 | if (!mddev->pers->sync_request) |
2214c260 | 8203 | return; |
2a2275d6 | 8204 | |
85572d7c | 8205 | spin_lock(&mddev->lock); |
2a2275d6 N |
8206 | if (mddev->in_sync) { |
8207 | mddev->in_sync = 0; | |
2953079c SL |
8208 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8209 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8210 | if (mddev->safemode_delay && |
8211 | mddev->safemode == 0) | |
8212 | mddev->safemode = 1; | |
85572d7c | 8213 | spin_unlock(&mddev->lock); |
2a2275d6 | 8214 | md_update_sb(mddev, 0); |
00bcb4ac | 8215 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8216 | /* wait for the dirty state to be recorded in the metadata */ |
8217 | wait_event(mddev->sb_wait, | |
2214c260 | 8218 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8219 | } else |
85572d7c | 8220 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8221 | } |
8222 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8223 | ||
1da177e4 LT |
8224 | #define SYNC_MARKS 10 |
8225 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8226 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8227 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8228 | { |
4ed8731d | 8229 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8230 | struct mddev *mddev2; |
1da177e4 LT |
8231 | unsigned int currspeed = 0, |
8232 | window; | |
ac7e50a3 | 8233 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8234 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8235 | unsigned long update_time; |
1da177e4 LT |
8236 | sector_t mark_cnt[SYNC_MARKS]; |
8237 | int last_mark,m; | |
8238 | struct list_head *tmp; | |
8239 | sector_t last_check; | |
57afd89f | 8240 | int skipped = 0; |
3cb03002 | 8241 | struct md_rdev *rdev; |
c4a39551 | 8242 | char *desc, *action = NULL; |
7c2c57c9 | 8243 | struct blk_plug plug; |
41a9a0dc | 8244 | int ret; |
1da177e4 LT |
8245 | |
8246 | /* just incase thread restarts... */ | |
d5d885fd SL |
8247 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8248 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8249 | return; |
3991b31e N |
8250 | if (mddev->ro) {/* never try to sync a read-only array */ |
8251 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8252 | return; |
3991b31e | 8253 | } |
1da177e4 | 8254 | |
41a9a0dc GJ |
8255 | if (mddev_is_clustered(mddev)) { |
8256 | ret = md_cluster_ops->resync_start(mddev); | |
8257 | if (ret) | |
8258 | goto skip; | |
8259 | ||
bb8bf15b | 8260 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8261 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8262 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8263 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8264 | && ((unsigned long long)mddev->curr_resync_completed | |
8265 | < (unsigned long long)mddev->resync_max_sectors)) | |
8266 | goto skip; | |
8267 | } | |
8268 | ||
61df9d91 | 8269 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8270 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8271 | desc = "data-check"; |
c4a39551 JB |
8272 | action = "check"; |
8273 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8274 | desc = "requested-resync"; |
c4a39551 JB |
8275 | action = "repair"; |
8276 | } else | |
61df9d91 N |
8277 | desc = "resync"; |
8278 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8279 | desc = "reshape"; | |
8280 | else | |
8281 | desc = "recovery"; | |
8282 | ||
c4a39551 JB |
8283 | mddev->last_sync_action = action ?: desc; |
8284 | ||
1da177e4 LT |
8285 | /* we overload curr_resync somewhat here. |
8286 | * 0 == not engaged in resync at all | |
8287 | * 2 == checking that there is no conflict with another sync | |
8288 | * 1 == like 2, but have yielded to allow conflicting resync to | |
8289 | * commense | |
8290 | * other == active in resync - this many blocks | |
8291 | * | |
8292 | * Before starting a resync we must have set curr_resync to | |
8293 | * 2, and then checked that every "conflicting" array has curr_resync | |
8294 | * less than ours. When we find one that is the same or higher | |
8295 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8296 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8297 | * This will mean we have to start checking from the beginning again. | |
8298 | * | |
8299 | */ | |
8300 | ||
8301 | do { | |
c622ca54 | 8302 | int mddev2_minor = -1; |
1da177e4 LT |
8303 | mddev->curr_resync = 2; |
8304 | ||
8305 | try_again: | |
404e4b43 | 8306 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8307 | goto skip; |
29ac4aa3 | 8308 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8309 | if (mddev2 == mddev) |
8310 | continue; | |
90b08710 BS |
8311 | if (!mddev->parallel_resync |
8312 | && mddev2->curr_resync | |
8313 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8314 | DEFINE_WAIT(wq); |
8315 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8316 | /* arbitrarily yield */ | |
8317 | mddev->curr_resync = 1; | |
8318 | wake_up(&resync_wait); | |
8319 | } | |
8320 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8321 | /* no need to wait here, we can wait the next | |
8322 | * time 'round when curr_resync == 2 | |
8323 | */ | |
8324 | continue; | |
9744197c N |
8325 | /* We need to wait 'interruptible' so as not to |
8326 | * contribute to the load average, and not to | |
8327 | * be caught by 'softlockup' | |
8328 | */ | |
8329 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8330 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8331 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8332 | if (mddev2_minor != mddev2->md_minor) { |
8333 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8334 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8335 | desc, mdname(mddev), | |
8336 | mdname(mddev2)); | |
c622ca54 | 8337 | } |
1da177e4 | 8338 | mddev_put(mddev2); |
9744197c N |
8339 | if (signal_pending(current)) |
8340 | flush_signals(current); | |
1da177e4 LT |
8341 | schedule(); |
8342 | finish_wait(&resync_wait, &wq); | |
8343 | goto try_again; | |
8344 | } | |
8345 | finish_wait(&resync_wait, &wq); | |
8346 | } | |
8347 | } | |
8348 | } while (mddev->curr_resync < 2); | |
8349 | ||
5fd6c1dc | 8350 | j = 0; |
9d88883e | 8351 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8352 | /* resync follows the size requested by the personality, |
57afd89f | 8353 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8354 | */ |
8355 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8356 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8357 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8358 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8359 | j = mddev->resync_min; | |
8360 | else if (!mddev->bitmap) | |
5fd6c1dc | 8361 | j = mddev->recovery_cp; |
5e96ee65 | 8362 | |
cb9ee154 | 8363 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8364 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8365 | /* |
8366 | * If the original node aborts reshaping then we continue the | |
8367 | * reshaping, so set j again to avoid restart reshape from the | |
8368 | * first beginning | |
8369 | */ | |
8370 | if (mddev_is_clustered(mddev) && | |
8371 | mddev->reshape_position != MaxSector) | |
8372 | j = mddev->reshape_position; | |
8373 | } else { | |
1da177e4 | 8374 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8375 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8376 | j = MaxSector; |
4e59ca7d | 8377 | rcu_read_lock(); |
dafb20fa | 8378 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8379 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8380 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8381 | !test_bit(Faulty, &rdev->flags) && |
8382 | !test_bit(In_sync, &rdev->flags) && | |
8383 | rdev->recovery_offset < j) | |
8384 | j = rdev->recovery_offset; | |
4e59ca7d | 8385 | rcu_read_unlock(); |
133d4527 N |
8386 | |
8387 | /* If there is a bitmap, we need to make sure all | |
8388 | * writes that started before we added a spare | |
8389 | * complete before we start doing a recovery. | |
8390 | * Otherwise the write might complete and (via | |
8391 | * bitmap_endwrite) set a bit in the bitmap after the | |
8392 | * recovery has checked that bit and skipped that | |
8393 | * region. | |
8394 | */ | |
8395 | if (mddev->bitmap) { | |
8396 | mddev->pers->quiesce(mddev, 1); | |
8397 | mddev->pers->quiesce(mddev, 0); | |
8398 | } | |
5fd6c1dc | 8399 | } |
1da177e4 | 8400 | |
9d48739e N |
8401 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8402 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8403 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8404 | speed_max(mddev), desc); | |
1da177e4 | 8405 | |
eea1bf38 | 8406 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8407 | |
57afd89f | 8408 | io_sectors = 0; |
1da177e4 LT |
8409 | for (m = 0; m < SYNC_MARKS; m++) { |
8410 | mark[m] = jiffies; | |
57afd89f | 8411 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8412 | } |
8413 | last_mark = 0; | |
8414 | mddev->resync_mark = mark[last_mark]; | |
8415 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8416 | ||
8417 | /* | |
8418 | * Tune reconstruction: | |
8419 | */ | |
8420 | window = 32*(PAGE_SIZE/512); | |
9d48739e N |
8421 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8422 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8423 | |
8424 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8425 | last_check = 0; |
8426 | ||
8427 | if (j>2) { | |
9d48739e N |
8428 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8429 | desc, mdname(mddev)); | |
1da177e4 | 8430 | mddev->curr_resync = j; |
72f36d59 N |
8431 | } else |
8432 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8433 | mddev->curr_resync_completed = j; |
72f36d59 N |
8434 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8435 | md_new_event(mddev); | |
54f89341 | 8436 | update_time = jiffies; |
1da177e4 | 8437 | |
7c2c57c9 | 8438 | blk_start_plug(&plug); |
1da177e4 | 8439 | while (j < max_sectors) { |
57afd89f | 8440 | sector_t sectors; |
1da177e4 | 8441 | |
57afd89f | 8442 | skipped = 0; |
97e4f42d | 8443 | |
7a91ee1f N |
8444 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8445 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8446 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8447 | > (max_sectors >> 4)) || | |
54f89341 | 8448 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8449 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8450 | >= mddev->resync_max - mddev->curr_resync_completed || |
8451 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8452 | )) { |
97e4f42d | 8453 | /* time to update curr_resync_completed */ |
97e4f42d N |
8454 | wait_event(mddev->recovery_wait, |
8455 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8456 | mddev->curr_resync_completed = j; |
35d78c66 | 8457 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8458 | j > mddev->recovery_cp) | |
8459 | mddev->recovery_cp = j; | |
54f89341 | 8460 | update_time = jiffies; |
2953079c | 8461 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8462 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8463 | } |
acb180b0 | 8464 | |
c91abf5a N |
8465 | while (j >= mddev->resync_max && |
8466 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8467 | /* As this condition is controlled by user-space, |
8468 | * we can block indefinitely, so use '_interruptible' | |
8469 | * to avoid triggering warnings. | |
8470 | */ | |
8471 | flush_signals(current); /* just in case */ | |
8472 | wait_event_interruptible(mddev->recovery_wait, | |
8473 | mddev->resync_max > j | |
c91abf5a N |
8474 | || test_bit(MD_RECOVERY_INTR, |
8475 | &mddev->recovery)); | |
e62e58a5 | 8476 | } |
acb180b0 | 8477 | |
c91abf5a N |
8478 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8479 | break; | |
acb180b0 | 8480 | |
09314799 | 8481 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8482 | if (sectors == 0) { |
dfc70645 | 8483 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8484 | break; |
1da177e4 | 8485 | } |
57afd89f N |
8486 | |
8487 | if (!skipped) { /* actual IO requested */ | |
8488 | io_sectors += sectors; | |
8489 | atomic_add(sectors, &mddev->recovery_active); | |
8490 | } | |
8491 | ||
e875ecea N |
8492 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8493 | break; | |
8494 | ||
1da177e4 | 8495 | j += sectors; |
5ed1df2e N |
8496 | if (j > max_sectors) |
8497 | /* when skipping, extra large numbers can be returned. */ | |
8498 | j = max_sectors; | |
72f36d59 N |
8499 | if (j > 2) |
8500 | mddev->curr_resync = j; | |
ff4e8d9a | 8501 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8502 | if (last_check == 0) |
e875ecea | 8503 | /* this is the earliest that rebuild will be |
d7603b7e N |
8504 | * visible in /proc/mdstat |
8505 | */ | |
8506 | md_new_event(mddev); | |
57afd89f N |
8507 | |
8508 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8509 | continue; |
8510 | ||
57afd89f | 8511 | last_check = io_sectors; |
1da177e4 LT |
8512 | repeat: |
8513 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8514 | /* step marks */ | |
8515 | int next = (last_mark+1) % SYNC_MARKS; | |
8516 | ||
8517 | mddev->resync_mark = mark[next]; | |
8518 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8519 | mark[next] = jiffies; | |
57afd89f | 8520 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8521 | last_mark = next; |
8522 | } | |
8523 | ||
c91abf5a N |
8524 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8525 | break; | |
1da177e4 LT |
8526 | |
8527 | /* | |
8528 | * this loop exits only if either when we are slower than | |
8529 | * the 'hard' speed limit, or the system was IO-idle for | |
8530 | * a jiffy. | |
8531 | * the system might be non-idle CPU-wise, but we only care | |
8532 | * about not overloading the IO subsystem. (things like an | |
8533 | * e2fsck being done on the RAID array should execute fast) | |
8534 | */ | |
1da177e4 LT |
8535 | cond_resched(); |
8536 | ||
ac7e50a3 XN |
8537 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8538 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8539 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8540 | |
88202a0c | 8541 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8542 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8543 | msleep(500); |
1da177e4 LT |
8544 | goto repeat; |
8545 | } | |
ac8fa419 N |
8546 | if (!is_mddev_idle(mddev, 0)) { |
8547 | /* | |
8548 | * Give other IO more of a chance. | |
8549 | * The faster the devices, the less we wait. | |
8550 | */ | |
8551 | wait_event(mddev->recovery_wait, | |
8552 | !atomic_read(&mddev->recovery_active)); | |
8553 | } | |
1da177e4 LT |
8554 | } |
8555 | } | |
9d48739e N |
8556 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8557 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8558 | ? "interrupted" : "done"); | |
1da177e4 LT |
8559 | /* |
8560 | * this also signals 'finished resyncing' to md_stop | |
8561 | */ | |
7c2c57c9 | 8562 | blk_finish_plug(&plug); |
1da177e4 LT |
8563 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8564 | ||
5ed1df2e N |
8565 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8566 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8567 | mddev->curr_resync > 3) { |
5ed1df2e N |
8568 | mddev->curr_resync_completed = mddev->curr_resync; |
8569 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8570 | } | |
09314799 | 8571 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8572 | |
dfc70645 | 8573 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8574 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8575 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8576 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8577 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8578 | pr_debug("md: checkpointing %s of %s.\n", |
8579 | desc, mdname(mddev)); | |
0a19caab | 8580 | if (test_bit(MD_RECOVERY_ERROR, |
8581 | &mddev->recovery)) | |
8582 | mddev->recovery_cp = | |
8583 | mddev->curr_resync_completed; | |
8584 | else | |
8585 | mddev->recovery_cp = | |
8586 | mddev->curr_resync; | |
5fd6c1dc N |
8587 | } |
8588 | } else | |
8589 | mddev->recovery_cp = MaxSector; | |
8590 | } else { | |
8591 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8592 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8593 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8594 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8595 | rcu_read_lock(); | |
8596 | rdev_for_each_rcu(rdev, mddev) | |
8597 | if (rdev->raid_disk >= 0 && | |
8598 | mddev->delta_disks >= 0 && | |
8599 | !test_bit(Journal, &rdev->flags) && | |
8600 | !test_bit(Faulty, &rdev->flags) && | |
8601 | !test_bit(In_sync, &rdev->flags) && | |
8602 | rdev->recovery_offset < mddev->curr_resync) | |
8603 | rdev->recovery_offset = mddev->curr_resync; | |
8604 | rcu_read_unlock(); | |
8605 | } | |
5fd6c1dc | 8606 | } |
1da177e4 | 8607 | } |
db91ff55 | 8608 | skip: |
bb8bf15b GJ |
8609 | /* set CHANGE_PENDING here since maybe another update is needed, |
8610 | * so other nodes are informed. It should be harmless for normal | |
8611 | * raid */ | |
2953079c SL |
8612 | set_mask_bits(&mddev->sb_flags, 0, |
8613 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8614 | |
8876391e BC |
8615 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8616 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8617 | mddev->delta_disks > 0 && | |
8618 | mddev->pers->finish_reshape && | |
8619 | mddev->pers->size && | |
8620 | mddev->queue) { | |
8621 | mddev_lock_nointr(mddev); | |
8622 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
8623 | mddev_unlock(mddev); | |
aefb2e5f GJ |
8624 | if (!mddev_is_clustered(mddev)) { |
8625 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
8626 | revalidate_disk(mddev->gendisk); | |
8627 | } | |
8876391e BC |
8628 | } |
8629 | ||
23da422b | 8630 | spin_lock(&mddev->lock); |
c07b70ad N |
8631 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8632 | /* We completed so min/max setting can be forgotten if used. */ | |
8633 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8634 | mddev->resync_min = 0; | |
8635 | mddev->resync_max = MaxSector; | |
8636 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8637 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8638 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8639 | mddev->curr_resync = 0; |
23da422b N |
8640 | spin_unlock(&mddev->lock); |
8641 | ||
1da177e4 | 8642 | wake_up(&resync_wait); |
1da177e4 | 8643 | md_wakeup_thread(mddev->thread); |
c6207277 | 8644 | return; |
1da177e4 | 8645 | } |
29269553 | 8646 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8647 | |
746d3207 N |
8648 | static int remove_and_add_spares(struct mddev *mddev, |
8649 | struct md_rdev *this) | |
b4c4c7b8 | 8650 | { |
3cb03002 | 8651 | struct md_rdev *rdev; |
b4c4c7b8 | 8652 | int spares = 0; |
f2a371c5 | 8653 | int removed = 0; |
d787be40 | 8654 | bool remove_some = false; |
b4c4c7b8 | 8655 | |
39772f0a N |
8656 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
8657 | /* Mustn't remove devices when resync thread is running */ | |
8658 | return 0; | |
8659 | ||
d787be40 N |
8660 | rdev_for_each(rdev, mddev) { |
8661 | if ((this == NULL || rdev == this) && | |
8662 | rdev->raid_disk >= 0 && | |
8663 | !test_bit(Blocked, &rdev->flags) && | |
8664 | test_bit(Faulty, &rdev->flags) && | |
8665 | atomic_read(&rdev->nr_pending)==0) { | |
8666 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8667 | * never get nr_pending incremented, | |
8668 | * never get Faulty cleared, and never get Blocked set. | |
8669 | * So we can synchronize_rcu now rather than once per device | |
8670 | */ | |
8671 | remove_some = true; | |
8672 | set_bit(RemoveSynchronized, &rdev->flags); | |
8673 | } | |
8674 | } | |
8675 | ||
8676 | if (remove_some) | |
8677 | synchronize_rcu(); | |
8678 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8679 | if ((this == NULL || rdev == this) && |
8680 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8681 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8682 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8683 | (!test_bit(In_sync, &rdev->flags) && |
8684 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8685 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8686 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8687 | mddev, rdev) == 0) { |
36fad858 | 8688 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 8689 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 8690 | rdev->raid_disk = -1; |
f2a371c5 | 8691 | removed++; |
b4c4c7b8 N |
8692 | } |
8693 | } | |
d787be40 N |
8694 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8695 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8696 | } | |
8697 | ||
90584fc9 JB |
8698 | if (removed && mddev->kobj.sd) |
8699 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8700 | |
2910ff17 | 8701 | if (this && removed) |
746d3207 N |
8702 | goto no_add; |
8703 | ||
dafb20fa | 8704 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8705 | if (this && this != rdev) |
8706 | continue; | |
dbb64f86 GR |
8707 | if (test_bit(Candidate, &rdev->flags)) |
8708 | continue; | |
7bfec5f3 N |
8709 | if (rdev->raid_disk >= 0 && |
8710 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8711 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8712 | !test_bit(Faulty, &rdev->flags)) |
8713 | spares++; | |
7ceb17e8 N |
8714 | if (rdev->raid_disk >= 0) |
8715 | continue; | |
8716 | if (test_bit(Faulty, &rdev->flags)) | |
8717 | continue; | |
f6b6ec5c SL |
8718 | if (!test_bit(Journal, &rdev->flags)) { |
8719 | if (mddev->ro && | |
8720 | ! (rdev->saved_raid_disk >= 0 && | |
8721 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8722 | continue; | |
7ceb17e8 | 8723 | |
f6b6ec5c SL |
8724 | rdev->recovery_offset = 0; |
8725 | } | |
7ceb17e8 N |
8726 | if (mddev->pers-> |
8727 | hot_add_disk(mddev, rdev) == 0) { | |
8728 | if (sysfs_link_rdev(mddev, rdev)) | |
8729 | /* failure here is OK */; | |
f6b6ec5c SL |
8730 | if (!test_bit(Journal, &rdev->flags)) |
8731 | spares++; | |
7ceb17e8 | 8732 | md_new_event(mddev); |
2953079c | 8733 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8734 | } |
b4c4c7b8 | 8735 | } |
746d3207 | 8736 | no_add: |
6dafab6b | 8737 | if (removed) |
2953079c | 8738 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8739 | return spares; |
8740 | } | |
7ebc0be7 | 8741 | |
ac05f256 N |
8742 | static void md_start_sync(struct work_struct *ws) |
8743 | { | |
8744 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8745 | |
ac05f256 N |
8746 | mddev->sync_thread = md_register_thread(md_do_sync, |
8747 | mddev, | |
8748 | "resync"); | |
8749 | if (!mddev->sync_thread) { | |
9d48739e N |
8750 | pr_warn("%s: could not start resync thread...\n", |
8751 | mdname(mddev)); | |
ac05f256 N |
8752 | /* leave the spares where they are, it shouldn't hurt */ |
8753 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8754 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8755 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8756 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8757 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8758 | wake_up(&resync_wait); |
ac05f256 N |
8759 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8760 | &mddev->recovery)) | |
8761 | if (mddev->sysfs_action) | |
8762 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8763 | } else | |
8764 | md_wakeup_thread(mddev->sync_thread); | |
8765 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8766 | md_new_event(mddev); | |
8767 | } | |
8768 | ||
1da177e4 LT |
8769 | /* |
8770 | * This routine is regularly called by all per-raid-array threads to | |
8771 | * deal with generic issues like resync and super-block update. | |
8772 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8773 | * need this as they never do any recovery or update the superblock. | |
8774 | * | |
8775 | * It does not do any resync itself, but rather "forks" off other threads | |
8776 | * to do that as needed. | |
8777 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8778 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8779 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8780 | * and wakeups up this thread which will reap the thread and finish up. |
8781 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8782 | * | |
8783 | * The overall approach is: | |
8784 | * 1/ if the superblock needs updating, update it. | |
8785 | * 2/ If a recovery thread is running, don't do anything else. | |
8786 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8787 | * 4/ If there are any faulty devices, remove them. | |
8788 | * 5/ If array is degraded, try to add spares devices | |
8789 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8790 | */ | |
fd01b88c | 8791 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8792 | { |
059421e0 N |
8793 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
8794 | /* Write superblock - thread that called mddev_suspend() | |
8795 | * holds reconfig_mutex for us. | |
8796 | */ | |
8797 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
8798 | smp_mb__after_atomic(); | |
8799 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
8800 | md_update_sb(mddev, 0); | |
8801 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
8802 | wake_up(&mddev->sb_wait); | |
8803 | } | |
8804 | ||
68866e42 JB |
8805 | if (mddev->suspended) |
8806 | return; | |
8807 | ||
5f40402d | 8808 | if (mddev->bitmap) |
e64e4018 | 8809 | md_bitmap_daemon_work(mddev); |
1da177e4 | 8810 | |
fca4d848 | 8811 | if (signal_pending(current)) { |
31a59e34 | 8812 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8813 | pr_debug("md: %s in immediate safe mode\n", |
8814 | mdname(mddev)); | |
fca4d848 N |
8815 | mddev->safemode = 2; |
8816 | } | |
8817 | flush_signals(current); | |
8818 | } | |
8819 | ||
c89a8eee N |
8820 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8821 | return; | |
1da177e4 | 8822 | if ( ! ( |
2953079c | 8823 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8824 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8825 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 8826 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 8827 | (mddev->safemode == 2 |
fca4d848 | 8828 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
8829 | )) |
8830 | return; | |
fca4d848 | 8831 | |
df5b89b3 | 8832 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8833 | int spares = 0; |
fca4d848 | 8834 | |
afc1f55c | 8835 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
8836 | mddev->safemode = 0; |
8837 | ||
c89a8eee | 8838 | if (mddev->ro) { |
ab16bfc7 NB |
8839 | struct md_rdev *rdev; |
8840 | if (!mddev->external && mddev->in_sync) | |
8841 | /* 'Blocked' flag not needed as failed devices | |
8842 | * will be recorded if array switched to read/write. | |
8843 | * Leaving it set will prevent the device | |
8844 | * from being removed. | |
8845 | */ | |
8846 | rdev_for_each(rdev, mddev) | |
8847 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8848 | /* On a read-only array we can: |
8849 | * - remove failed devices | |
8850 | * - add already-in_sync devices if the array itself | |
8851 | * is in-sync. | |
8852 | * As we only add devices that are already in-sync, | |
8853 | * we can activate the spares immediately. | |
c89a8eee | 8854 | */ |
7ceb17e8 | 8855 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8856 | /* There is no thread, but we need to call |
8857 | * ->spare_active and clear saved_raid_disk | |
8858 | */ | |
2ac295a5 | 8859 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8860 | md_reap_sync_thread(mddev); |
a4a3d26d | 8861 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 8862 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 8863 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
8864 | goto unlock; |
8865 | } | |
8866 | ||
659b254f GJ |
8867 | if (mddev_is_clustered(mddev)) { |
8868 | struct md_rdev *rdev; | |
8869 | /* kick the device if another node issued a | |
8870 | * remove disk. | |
8871 | */ | |
8872 | rdev_for_each(rdev, mddev) { | |
8873 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
8874 | rdev->raid_disk < 0) | |
8875 | md_kick_rdev_from_array(rdev); | |
8876 | } | |
8877 | } | |
8878 | ||
6497709b | 8879 | if (!mddev->external && !mddev->in_sync) { |
85572d7c | 8880 | spin_lock(&mddev->lock); |
6497709b | 8881 | set_in_sync(mddev); |
85572d7c | 8882 | spin_unlock(&mddev->lock); |
fca4d848 | 8883 | } |
fca4d848 | 8884 | |
2953079c | 8885 | if (mddev->sb_flags) |
850b2b42 | 8886 | md_update_sb(mddev, 0); |
06d91a5f | 8887 | |
1da177e4 LT |
8888 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
8889 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
8890 | /* resync/recovery still happening */ | |
8891 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8892 | goto unlock; | |
8893 | } | |
8894 | if (mddev->sync_thread) { | |
a91d5ac0 | 8895 | md_reap_sync_thread(mddev); |
1da177e4 LT |
8896 | goto unlock; |
8897 | } | |
72a23c21 NB |
8898 | /* Set RUNNING before clearing NEEDED to avoid |
8899 | * any transients in the value of "sync_action". | |
8900 | */ | |
72f36d59 | 8901 | mddev->curr_resync_completed = 0; |
23da422b | 8902 | spin_lock(&mddev->lock); |
72a23c21 | 8903 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 8904 | spin_unlock(&mddev->lock); |
24dd469d N |
8905 | /* Clear some bits that don't mean anything, but |
8906 | * might be left set | |
8907 | */ | |
24dd469d N |
8908 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8909 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 8910 | |
ed209584 N |
8911 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
8912 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 8913 | goto not_running; |
1da177e4 LT |
8914 | /* no recovery is running. |
8915 | * remove any failed drives, then | |
8916 | * add spares if possible. | |
72f36d59 | 8917 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
8918 | * the personality to fail the re-add. |
8919 | */ | |
1da177e4 | 8920 | |
b4c4c7b8 | 8921 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
8922 | if (mddev->pers->check_reshape == NULL || |
8923 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 8924 | /* Cannot proceed */ |
ac05f256 | 8925 | goto not_running; |
b4c4c7b8 | 8926 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 8927 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 8928 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
8929 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8930 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 8931 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 8932 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8933 | } else if (mddev->recovery_cp < MaxSector) { |
8934 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 8935 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8936 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
8937 | /* nothing to be done ... */ | |
ac05f256 | 8938 | goto not_running; |
24dd469d | 8939 | |
1da177e4 | 8940 | if (mddev->pers->sync_request) { |
ef99bf48 | 8941 | if (spares) { |
a654b9d8 N |
8942 | /* We are adding a device or devices to an array |
8943 | * which has the bitmap stored on all devices. | |
8944 | * So make sure all bitmap pages get written | |
8945 | */ | |
e64e4018 | 8946 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 8947 | } |
ac05f256 N |
8948 | INIT_WORK(&mddev->del_work, md_start_sync); |
8949 | queue_work(md_misc_wq, &mddev->del_work); | |
8950 | goto unlock; | |
1da177e4 | 8951 | } |
ac05f256 | 8952 | not_running: |
72a23c21 NB |
8953 | if (!mddev->sync_thread) { |
8954 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8955 | wake_up(&resync_wait); |
72a23c21 NB |
8956 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8957 | &mddev->recovery)) | |
0c3573f1 | 8958 | if (mddev->sysfs_action) |
00bcb4ac | 8959 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 8960 | } |
ac05f256 N |
8961 | unlock: |
8962 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
8963 | mddev_unlock(mddev); |
8964 | } | |
8965 | } | |
6c144d31 | 8966 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 8967 | |
a91d5ac0 JB |
8968 | void md_reap_sync_thread(struct mddev *mddev) |
8969 | { | |
8970 | struct md_rdev *rdev; | |
aefb2e5f GJ |
8971 | sector_t old_dev_sectors = mddev->dev_sectors; |
8972 | bool is_reshaped = false; | |
a91d5ac0 JB |
8973 | |
8974 | /* resync has finished, collect result */ | |
8975 | md_unregister_thread(&mddev->sync_thread); | |
8976 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8977 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
8978 | /* success...*/ | |
8979 | /* activate any spares */ | |
8980 | if (mddev->pers->spare_active(mddev)) { | |
8981 | sysfs_notify(&mddev->kobj, NULL, | |
8982 | "degraded"); | |
2953079c | 8983 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
8984 | } |
8985 | } | |
8986 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 8987 | mddev->pers->finish_reshape) { |
a91d5ac0 | 8988 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
8989 | if (mddev_is_clustered(mddev)) |
8990 | is_reshaped = true; | |
8991 | } | |
a91d5ac0 JB |
8992 | |
8993 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 8994 | * information must be scrapped. |
a91d5ac0 | 8995 | */ |
f466722c N |
8996 | if (!mddev->degraded) |
8997 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
8998 | rdev->saved_raid_disk = -1; |
8999 | ||
9000 | md_update_sb(mddev, 1); | |
2953079c | 9001 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9002 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9003 | * clustered raid */ | |
9004 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9005 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9006 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9007 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9008 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9009 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9010 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9011 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9012 | /* |
9013 | * We call md_cluster_ops->update_size here because sync_size could | |
9014 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9015 | * so it is time to update size across cluster. | |
9016 | */ | |
9017 | if (mddev_is_clustered(mddev) && is_reshaped | |
9018 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9019 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9020 | wake_up(&resync_wait); |
a91d5ac0 JB |
9021 | /* flag recovery needed just to double check */ |
9022 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9023 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9024 | md_new_event(mddev); | |
9025 | if (mddev->event_work.func) | |
9026 | queue_work(md_misc_wq, &mddev->event_work); | |
9027 | } | |
6c144d31 | 9028 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9029 | |
fd01b88c | 9030 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9031 | { |
00bcb4ac | 9032 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9033 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9034 | !test_bit(Blocked, &rdev->flags) && |
9035 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9036 | msecs_to_jiffies(5000)); |
9037 | rdev_dec_pending(rdev, mddev); | |
9038 | } | |
9039 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9040 | ||
c6563a8c N |
9041 | void md_finish_reshape(struct mddev *mddev) |
9042 | { | |
9043 | /* called be personality module when reshape completes. */ | |
9044 | struct md_rdev *rdev; | |
9045 | ||
9046 | rdev_for_each(rdev, mddev) { | |
9047 | if (rdev->data_offset > rdev->new_data_offset) | |
9048 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9049 | else | |
9050 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9051 | rdev->data_offset = rdev->new_data_offset; | |
9052 | } | |
9053 | } | |
9054 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9055 | |
fc974ee2 | 9056 | /* Bad block management */ |
2230dfe4 | 9057 | |
fc974ee2 | 9058 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9059 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9060 | int is_new) |
2230dfe4 | 9061 | { |
85ad1d13 | 9062 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9063 | int rv; |
9064 | if (is_new) | |
9065 | s += rdev->new_data_offset; | |
9066 | else | |
9067 | s += rdev->data_offset; | |
fc974ee2 VV |
9068 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9069 | if (rv == 0) { | |
2230dfe4 | 9070 | /* Make sure they get written out promptly */ |
35b785f7 TM |
9071 | if (test_bit(ExternalBbl, &rdev->flags)) |
9072 | sysfs_notify(&rdev->kobj, NULL, | |
9073 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 9074 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9075 | set_mask_bits(&mddev->sb_flags, 0, |
9076 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9077 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9078 | return 1; |
9079 | } else | |
9080 | return 0; | |
2230dfe4 N |
9081 | } |
9082 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9083 | ||
c6563a8c N |
9084 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9085 | int is_new) | |
2230dfe4 | 9086 | { |
35b785f7 | 9087 | int rv; |
c6563a8c N |
9088 | if (is_new) |
9089 | s += rdev->new_data_offset; | |
9090 | else | |
9091 | s += rdev->data_offset; | |
35b785f7 TM |
9092 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9093 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
9094 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
9095 | return rv; | |
2230dfe4 N |
9096 | } |
9097 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9098 | ||
75c96f85 AB |
9099 | static int md_notify_reboot(struct notifier_block *this, |
9100 | unsigned long code, void *x) | |
1da177e4 LT |
9101 | { |
9102 | struct list_head *tmp; | |
fd01b88c | 9103 | struct mddev *mddev; |
2dba6a91 | 9104 | int need_delay = 0; |
1da177e4 | 9105 | |
c744a65c N |
9106 | for_each_mddev(mddev, tmp) { |
9107 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9108 | if (mddev->pers) |
9109 | __md_stop_writes(mddev); | |
0f62fb22 N |
9110 | if (mddev->persistent) |
9111 | mddev->safemode = 2; | |
c744a65c | 9112 | mddev_unlock(mddev); |
2dba6a91 | 9113 | } |
c744a65c | 9114 | need_delay = 1; |
1da177e4 | 9115 | } |
c744a65c N |
9116 | /* |
9117 | * certain more exotic SCSI devices are known to be | |
9118 | * volatile wrt too early system reboots. While the | |
9119 | * right place to handle this issue is the given | |
9120 | * driver, we do want to have a safe RAID driver ... | |
9121 | */ | |
9122 | if (need_delay) | |
9123 | mdelay(1000*1); | |
9124 | ||
1da177e4 LT |
9125 | return NOTIFY_DONE; |
9126 | } | |
9127 | ||
75c96f85 | 9128 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9129 | .notifier_call = md_notify_reboot, |
9130 | .next = NULL, | |
9131 | .priority = INT_MAX, /* before any real devices */ | |
9132 | }; | |
9133 | ||
9134 | static void md_geninit(void) | |
9135 | { | |
36a4e1fe | 9136 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9137 | |
c7705f34 | 9138 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
9139 | } |
9140 | ||
75c96f85 | 9141 | static int __init md_init(void) |
1da177e4 | 9142 | { |
e804ac78 TH |
9143 | int ret = -ENOMEM; |
9144 | ||
ada609ee | 9145 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9146 | if (!md_wq) |
9147 | goto err_wq; | |
9148 | ||
9149 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9150 | if (!md_misc_wq) | |
9151 | goto err_misc_wq; | |
9152 | ||
9153 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
9154 | goto err_md; | |
9155 | ||
9156 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9157 | goto err_mdp; | |
9158 | mdp_major = ret; | |
9159 | ||
af5628f0 | 9160 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9161 | md_probe, NULL, NULL); |
9162 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9163 | md_probe, NULL, NULL); |
9164 | ||
1da177e4 | 9165 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9166 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9167 | |
9168 | md_geninit(); | |
d710e138 | 9169 | return 0; |
1da177e4 | 9170 | |
e804ac78 TH |
9171 | err_mdp: |
9172 | unregister_blkdev(MD_MAJOR, "md"); | |
9173 | err_md: | |
9174 | destroy_workqueue(md_misc_wq); | |
9175 | err_misc_wq: | |
9176 | destroy_workqueue(md_wq); | |
9177 | err_wq: | |
9178 | return ret; | |
9179 | } | |
1da177e4 | 9180 | |
70bcecdb | 9181 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9182 | { |
70bcecdb GR |
9183 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9184 | struct md_rdev *rdev2; | |
9185 | int role, ret; | |
9186 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9187 | |
818da59f GJ |
9188 | /* |
9189 | * If size is changed in another node then we need to | |
9190 | * do resize as well. | |
9191 | */ | |
9192 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9193 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9194 | if (ret) | |
9195 | pr_info("md-cluster: resize failed\n"); | |
9196 | else | |
e64e4018 | 9197 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9198 | } |
9199 | ||
70bcecdb GR |
9200 | /* Check for change of roles in the active devices */ |
9201 | rdev_for_each(rdev2, mddev) { | |
9202 | if (test_bit(Faulty, &rdev2->flags)) | |
9203 | continue; | |
9204 | ||
9205 | /* Check if the roles changed */ | |
9206 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9207 | |
9208 | if (test_bit(Candidate, &rdev2->flags)) { | |
9209 | if (role == 0xfffe) { | |
9210 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9211 | md_kick_rdev_from_array(rdev2); | |
9212 | continue; | |
9213 | } | |
9214 | else | |
9215 | clear_bit(Candidate, &rdev2->flags); | |
9216 | } | |
9217 | ||
70bcecdb | 9218 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9219 | /* |
9220 | * got activated except reshape is happening. | |
9221 | */ | |
9222 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9223 | !(le32_to_cpu(sb->feature_map) & | |
9224 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9225 | rdev2->saved_raid_disk = role; |
9226 | ret = remove_and_add_spares(mddev, rdev2); | |
9227 | pr_info("Activated spare: %s\n", | |
9d48739e | 9228 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9229 | /* wakeup mddev->thread here, so array could |
9230 | * perform resync with the new activated disk */ | |
9231 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9232 | md_wakeup_thread(mddev->thread); | |
9233 | ||
70bcecdb GR |
9234 | } |
9235 | /* device faulty | |
9236 | * We just want to do the minimum to mark the disk | |
9237 | * as faulty. The recovery is performed by the | |
9238 | * one who initiated the error. | |
9239 | */ | |
9240 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9241 | md_error(mddev, rdev2); | |
9242 | clear_bit(Blocked, &rdev2->flags); | |
9243 | } | |
9244 | } | |
1d7e3e96 | 9245 | } |
70bcecdb | 9246 | |
28c1b9fd GR |
9247 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9248 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9249 | |
7564beda GJ |
9250 | /* |
9251 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9252 | * so it is time to check reshape. | |
9253 | */ | |
9254 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9255 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9256 | /* | |
9257 | * reshape is happening in the remote node, we need to | |
9258 | * update reshape_position and call start_reshape. | |
9259 | */ | |
9260 | mddev->reshape_position = sb->reshape_position; | |
9261 | if (mddev->pers->update_reshape_pos) | |
9262 | mddev->pers->update_reshape_pos(mddev); | |
9263 | if (mddev->pers->start_reshape) | |
9264 | mddev->pers->start_reshape(mddev); | |
9265 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9266 | mddev->reshape_position != MaxSector && | |
9267 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9268 | /* reshape is just done in another node. */ | |
9269 | mddev->reshape_position = MaxSector; | |
9270 | if (mddev->pers->update_reshape_pos) | |
9271 | mddev->pers->update_reshape_pos(mddev); | |
9272 | } | |
9273 | ||
70bcecdb GR |
9274 | /* Finally set the event to be up to date */ |
9275 | mddev->events = le64_to_cpu(sb->events); | |
9276 | } | |
9277 | ||
9278 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9279 | { | |
9280 | int err; | |
9281 | struct page *swapout = rdev->sb_page; | |
9282 | struct mdp_superblock_1 *sb; | |
9283 | ||
9284 | /* Store the sb page of the rdev in the swapout temporary | |
9285 | * variable in case we err in the future | |
9286 | */ | |
9287 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9288 | err = alloc_disk_sb(rdev); |
9289 | if (err == 0) { | |
9290 | ClearPageUptodate(rdev->sb_page); | |
9291 | rdev->sb_loaded = 0; | |
9292 | err = super_types[mddev->major_version]. | |
9293 | load_super(rdev, NULL, mddev->minor_version); | |
9294 | } | |
70bcecdb GR |
9295 | if (err < 0) { |
9296 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9297 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9298 | if (rdev->sb_page) |
9299 | put_page(rdev->sb_page); | |
70bcecdb GR |
9300 | rdev->sb_page = swapout; |
9301 | rdev->sb_loaded = 1; | |
9302 | return err; | |
1d7e3e96 GR |
9303 | } |
9304 | ||
70bcecdb GR |
9305 | sb = page_address(rdev->sb_page); |
9306 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9307 | * is not set | |
9308 | */ | |
9309 | ||
9310 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9311 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9312 | ||
9313 | /* The other node finished recovery, call spare_active to set | |
9314 | * device In_sync and mddev->degraded | |
9315 | */ | |
9316 | if (rdev->recovery_offset == MaxSector && | |
9317 | !test_bit(In_sync, &rdev->flags) && | |
9318 | mddev->pers->spare_active(mddev)) | |
9319 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9320 | ||
9321 | put_page(swapout); | |
9322 | return 0; | |
9323 | } | |
9324 | ||
9325 | void md_reload_sb(struct mddev *mddev, int nr) | |
9326 | { | |
9327 | struct md_rdev *rdev; | |
9328 | int err; | |
9329 | ||
9330 | /* Find the rdev */ | |
9331 | rdev_for_each_rcu(rdev, mddev) { | |
9332 | if (rdev->desc_nr == nr) | |
9333 | break; | |
9334 | } | |
9335 | ||
9336 | if (!rdev || rdev->desc_nr != nr) { | |
9337 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9338 | return; | |
9339 | } | |
9340 | ||
9341 | err = read_rdev(mddev, rdev); | |
9342 | if (err < 0) | |
9343 | return; | |
9344 | ||
9345 | check_sb_changes(mddev, rdev); | |
9346 | ||
9347 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9348 | rdev_for_each_rcu(rdev, mddev) { |
9349 | if (!test_bit(Faulty, &rdev->flags)) | |
9350 | read_rdev(mddev, rdev); | |
9351 | } | |
1d7e3e96 GR |
9352 | } |
9353 | EXPORT_SYMBOL(md_reload_sb); | |
9354 | ||
1da177e4 LT |
9355 | #ifndef MODULE |
9356 | ||
9357 | /* | |
9358 | * Searches all registered partitions for autorun RAID arrays | |
9359 | * at boot time. | |
9360 | */ | |
4d936ec1 | 9361 | |
5b1f5bc3 | 9362 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9363 | static LIST_HEAD(all_detected_devices); |
9364 | struct detected_devices_node { | |
9365 | struct list_head list; | |
9366 | dev_t dev; | |
9367 | }; | |
1da177e4 LT |
9368 | |
9369 | void md_autodetect_dev(dev_t dev) | |
9370 | { | |
4d936ec1 ME |
9371 | struct detected_devices_node *node_detected_dev; |
9372 | ||
9373 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9374 | if (node_detected_dev) { | |
9375 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9376 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9377 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9378 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9379 | } |
1da177e4 LT |
9380 | } |
9381 | ||
1da177e4 LT |
9382 | static void autostart_arrays(int part) |
9383 | { | |
3cb03002 | 9384 | struct md_rdev *rdev; |
4d936ec1 ME |
9385 | struct detected_devices_node *node_detected_dev; |
9386 | dev_t dev; | |
9387 | int i_scanned, i_passed; | |
1da177e4 | 9388 | |
4d936ec1 ME |
9389 | i_scanned = 0; |
9390 | i_passed = 0; | |
1da177e4 | 9391 | |
9d48739e | 9392 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9393 | |
5b1f5bc3 | 9394 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9395 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9396 | i_scanned++; | |
9397 | node_detected_dev = list_entry(all_detected_devices.next, | |
9398 | struct detected_devices_node, list); | |
9399 | list_del(&node_detected_dev->list); | |
9400 | dev = node_detected_dev->dev; | |
9401 | kfree(node_detected_dev); | |
90bcf133 | 9402 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9403 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9404 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9405 | if (IS_ERR(rdev)) |
9406 | continue; | |
9407 | ||
403df478 | 9408 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9409 | continue; |
403df478 | 9410 | |
d0fae18f | 9411 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9412 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9413 | i_passed++; |
1da177e4 | 9414 | } |
5b1f5bc3 | 9415 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9416 | |
9d48739e | 9417 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9418 | |
9419 | autorun_devices(part); | |
9420 | } | |
9421 | ||
fdee8ae4 | 9422 | #endif /* !MODULE */ |
1da177e4 LT |
9423 | |
9424 | static __exit void md_exit(void) | |
9425 | { | |
fd01b88c | 9426 | struct mddev *mddev; |
1da177e4 | 9427 | struct list_head *tmp; |
e2f23b60 | 9428 | int delay = 1; |
8ab5e4c1 | 9429 | |
af5628f0 | 9430 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9431 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9432 | |
3dbd8c2e | 9433 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9434 | unregister_blkdev(mdp_major, "mdp"); |
9435 | unregister_reboot_notifier(&md_notifier); | |
9436 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9437 | |
9438 | /* We cannot unload the modules while some process is | |
9439 | * waiting for us in select() or poll() - wake them up | |
9440 | */ | |
9441 | md_unloading = 1; | |
9442 | while (waitqueue_active(&md_event_waiters)) { | |
9443 | /* not safe to leave yet */ | |
9444 | wake_up(&md_event_waiters); | |
9445 | msleep(delay); | |
9446 | delay += delay; | |
9447 | } | |
1da177e4 | 9448 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9449 | |
29ac4aa3 | 9450 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9451 | export_array(mddev); |
9356863c | 9452 | mddev->ctime = 0; |
d3374825 | 9453 | mddev->hold_active = 0; |
9356863c N |
9454 | /* |
9455 | * for_each_mddev() will call mddev_put() at the end of each | |
9456 | * iteration. As the mddev is now fully clear, this will | |
9457 | * schedule the mddev for destruction by a workqueue, and the | |
9458 | * destroy_workqueue() below will wait for that to complete. | |
9459 | */ | |
1da177e4 | 9460 | } |
e804ac78 TH |
9461 | destroy_workqueue(md_misc_wq); |
9462 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9463 | } |
9464 | ||
685784aa | 9465 | subsys_initcall(md_init); |
1da177e4 LT |
9466 | module_exit(md_exit) |
9467 | ||
e4dca7b7 | 9468 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e N |
9469 | { |
9470 | return sprintf(buffer, "%d", start_readonly); | |
9471 | } | |
e4dca7b7 | 9472 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9473 | { |
4c9309c0 | 9474 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9475 | } |
9476 | ||
80ca3a44 N |
9477 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9478 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9479 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9480 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9481 | |
1da177e4 | 9482 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9483 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9484 | MODULE_ALIAS("md"); |
72008652 | 9485 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |