Commit | Line | Data |
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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 N |
209 | { |
210 | struct bio *b; | |
a167f663 | 211 | |
afeee514 | 212 | if (!mddev || !bioset_initialized(&mddev->bio_set)) |
a167f663 N |
213 | return bio_alloc(gfp_mask, nr_iovecs); |
214 | ||
afeee514 | 215 | b = bio_alloc_bioset(gfp_mask, nr_iovecs, &mddev->bio_set); |
a167f663 N |
216 | if (!b) |
217 | return NULL; | |
a167f663 N |
218 | return b; |
219 | } | |
220 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
221 | ||
5a85071c N |
222 | static struct bio *md_bio_alloc_sync(struct mddev *mddev) |
223 | { | |
afeee514 | 224 | if (!mddev || !bioset_initialized(&mddev->sync_set)) |
5a85071c N |
225 | return bio_alloc(GFP_NOIO, 1); |
226 | ||
afeee514 | 227 | return bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
5a85071c N |
228 | } |
229 | ||
d7603b7e N |
230 | /* |
231 | * We have a system wide 'event count' that is incremented | |
232 | * on any 'interesting' event, and readers of /proc/mdstat | |
233 | * can use 'poll' or 'select' to find out when the event | |
234 | * count increases. | |
235 | * | |
236 | * Events are: | |
237 | * start array, stop array, error, add device, remove device, | |
238 | * start build, activate spare | |
239 | */ | |
2989ddbd | 240 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 241 | static atomic_t md_event_count; |
fd01b88c | 242 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
243 | { |
244 | atomic_inc(&md_event_count); | |
245 | wake_up(&md_event_waiters); | |
246 | } | |
29269553 | 247 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 248 | |
1da177e4 LT |
249 | /* |
250 | * Enables to iterate over all existing md arrays | |
251 | * all_mddevs_lock protects this list. | |
252 | */ | |
253 | static LIST_HEAD(all_mddevs); | |
254 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
255 | ||
1da177e4 LT |
256 | /* |
257 | * iterates through all used mddevs in the system. | |
258 | * We take care to grab the all_mddevs_lock whenever navigating | |
259 | * the list, and to always hold a refcount when unlocked. | |
260 | * Any code which breaks out of this loop while own | |
261 | * a reference to the current mddev and must mddev_put it. | |
262 | */ | |
fd01b88c | 263 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 264 | \ |
f72ffdd6 | 265 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
266 | _tmp = all_mddevs.next; \ |
267 | _mddev = NULL;}); \ | |
268 | ({ if (_tmp != &all_mddevs) \ | |
269 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 270 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
271 | if (_mddev) mddev_put(_mddev); \ |
272 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
273 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 274 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 275 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
276 | ) |
277 | ||
409c57f3 N |
278 | /* Rather than calling directly into the personality make_request function, |
279 | * IO requests come here first so that we can check if the device is | |
280 | * being suspended pending a reconfiguration. | |
281 | * We hold a refcount over the call to ->make_request. By the time that | |
282 | * call has finished, the bio has been linked into some internal structure | |
283 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
284 | */ | |
b3143b9a N |
285 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
286 | { | |
287 | if (mddev->suspended) | |
288 | return true; | |
289 | if (bio_data_dir(bio) != WRITE) | |
290 | return false; | |
291 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
292 | return false; | |
293 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
294 | return false; | |
295 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
296 | return false; | |
297 | return true; | |
298 | } | |
299 | ||
393debc2 SL |
300 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
301 | { | |
302 | check_suspended: | |
303 | rcu_read_lock(); | |
b3143b9a | 304 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
305 | DEFINE_WAIT(__wait); |
306 | for (;;) { | |
307 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
308 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 309 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
310 | break; |
311 | rcu_read_unlock(); | |
312 | schedule(); | |
313 | rcu_read_lock(); | |
314 | } | |
315 | finish_wait(&mddev->sb_wait, &__wait); | |
316 | } | |
317 | atomic_inc(&mddev->active_io); | |
318 | rcu_read_unlock(); | |
319 | ||
320 | if (!mddev->pers->make_request(mddev, bio)) { | |
321 | atomic_dec(&mddev->active_io); | |
322 | wake_up(&mddev->sb_wait); | |
323 | goto check_suspended; | |
324 | } | |
325 | ||
326 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
327 | wake_up(&mddev->sb_wait); | |
328 | } | |
329 | EXPORT_SYMBOL(md_handle_request); | |
330 | ||
dece1635 | 331 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 332 | { |
49077326 | 333 | const int rw = bio_data_dir(bio); |
ddcf35d3 | 334 | const int sgrp = op_stat_group(bio_op(bio)); |
fd01b88c | 335 | struct mddev *mddev = q->queuedata; |
e91ece55 | 336 | unsigned int sectors; |
74672d06 | 337 | int cpu; |
49077326 | 338 | |
af67c31f | 339 | blk_queue_split(q, &bio); |
54efd50b | 340 | |
274d8cbd | 341 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 342 | bio_io_error(bio); |
dece1635 | 343 | return BLK_QC_T_NONE; |
409c57f3 | 344 | } |
bbfa57c0 | 345 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 346 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 347 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 348 | bio_endio(bio); |
dece1635 | 349 | return BLK_QC_T_NONE; |
bbfa57c0 | 350 | } |
49077326 | 351 | |
e91ece55 CM |
352 | /* |
353 | * save the sectors now since our bio can | |
354 | * go away inside make_request | |
355 | */ | |
356 | sectors = bio_sectors(bio); | |
9c573de3 | 357 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 358 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
359 | |
360 | md_handle_request(mddev, bio); | |
49077326 | 361 | |
74672d06 | 362 | cpu = part_stat_lock(); |
ddcf35d3 MC |
363 | part_stat_inc(cpu, &mddev->gendisk->part0, ios[sgrp]); |
364 | part_stat_add(cpu, &mddev->gendisk->part0, sectors[sgrp], sectors); | |
74672d06 | 365 | part_stat_unlock(); |
49077326 | 366 | |
dece1635 | 367 | return BLK_QC_T_NONE; |
409c57f3 N |
368 | } |
369 | ||
9e35b99c N |
370 | /* mddev_suspend makes sure no new requests are submitted |
371 | * to the device, and that any requests that have been submitted | |
372 | * are completely handled. | |
afa0f557 N |
373 | * Once mddev_detach() is called and completes, the module will be |
374 | * completely unused. | |
9e35b99c | 375 | */ |
fd01b88c | 376 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 377 | { |
092398dc | 378 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 379 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
380 | if (mddev->suspended++) |
381 | return; | |
409c57f3 | 382 | synchronize_rcu(); |
cc27b0c7 | 383 | wake_up(&mddev->sb_wait); |
35bfc521 N |
384 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
385 | smp_mb__after_atomic(); | |
409c57f3 N |
386 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
387 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
388 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
389 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
390 | |
391 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 392 | } |
390ee602 | 393 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 394 | |
fd01b88c | 395 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 396 | { |
4d5324f7 | 397 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
398 | if (--mddev->suspended) |
399 | return; | |
409c57f3 N |
400 | wake_up(&mddev->sb_wait); |
401 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 402 | |
47525e59 | 403 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
404 | md_wakeup_thread(mddev->thread); |
405 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 406 | } |
390ee602 | 407 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 408 | |
fd01b88c | 409 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 410 | { |
5c675f83 N |
411 | struct md_personality *pers = mddev->pers; |
412 | int ret = 0; | |
413 | ||
414 | rcu_read_lock(); | |
415 | if (mddev->suspended) | |
416 | ret = 1; | |
417 | else if (pers && pers->congested) | |
418 | ret = pers->congested(mddev, bits); | |
419 | rcu_read_unlock(); | |
420 | return ret; | |
421 | } | |
422 | EXPORT_SYMBOL_GPL(mddev_congested); | |
423 | static int md_congested(void *data, int bits) | |
424 | { | |
425 | struct mddev *mddev = data; | |
426 | return mddev_congested(mddev, bits); | |
3fa841d7 | 427 | } |
3fa841d7 | 428 | |
a2826aa9 | 429 | /* |
e9c7469b | 430 | * Generic flush handling for md |
a2826aa9 | 431 | */ |
5a409b4f XN |
432 | static void submit_flushes(struct work_struct *ws) |
433 | { | |
434 | struct flush_info *fi = container_of(ws, struct flush_info, flush_work); | |
435 | struct mddev *mddev = fi->mddev; | |
436 | struct bio *bio = fi->bio; | |
437 | ||
438 | bio->bi_opf &= ~REQ_PREFLUSH; | |
439 | md_handle_request(mddev, bio); | |
440 | ||
441 | mempool_free(fi, mddev->flush_pool); | |
442 | } | |
a2826aa9 | 443 | |
5a409b4f | 444 | static void md_end_flush(struct bio *fbio) |
a2826aa9 | 445 | { |
5a409b4f XN |
446 | struct flush_bio *fb = fbio->bi_private; |
447 | struct md_rdev *rdev = fb->rdev; | |
448 | struct flush_info *fi = fb->fi; | |
449 | struct bio *bio = fi->bio; | |
450 | struct mddev *mddev = fi->mddev; | |
a2826aa9 N |
451 | |
452 | rdev_dec_pending(rdev, mddev); | |
453 | ||
5a409b4f XN |
454 | if (atomic_dec_and_test(&fi->flush_pending)) { |
455 | if (bio->bi_iter.bi_size == 0) | |
456 | /* an empty barrier - all done */ | |
457 | bio_endio(bio); | |
458 | else { | |
459 | INIT_WORK(&fi->flush_work, submit_flushes); | |
460 | queue_work(md_wq, &fi->flush_work); | |
461 | } | |
a2826aa9 | 462 | } |
a2826aa9 | 463 | |
5a409b4f XN |
464 | mempool_free(fb, mddev->flush_bio_pool); |
465 | bio_put(fbio); | |
466 | } | |
a7a07e69 | 467 | |
5a409b4f | 468 | void md_flush_request(struct mddev *mddev, struct bio *bio) |
a2826aa9 | 469 | { |
3cb03002 | 470 | struct md_rdev *rdev; |
5a409b4f XN |
471 | struct flush_info *fi; |
472 | ||
473 | fi = mempool_alloc(mddev->flush_pool, GFP_NOIO); | |
474 | ||
475 | fi->bio = bio; | |
476 | fi->mddev = mddev; | |
477 | atomic_set(&fi->flush_pending, 1); | |
a2826aa9 N |
478 | |
479 | rcu_read_lock(); | |
dafb20fa | 480 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
481 | if (rdev->raid_disk >= 0 && |
482 | !test_bit(Faulty, &rdev->flags)) { | |
483 | /* Take two references, one is dropped | |
484 | * when request finishes, one after | |
485 | * we reclaim rcu_read_lock | |
486 | */ | |
487 | struct bio *bi; | |
5a409b4f | 488 | struct flush_bio *fb; |
a2826aa9 N |
489 | atomic_inc(&rdev->nr_pending); |
490 | atomic_inc(&rdev->nr_pending); | |
491 | rcu_read_unlock(); | |
5a409b4f XN |
492 | |
493 | fb = mempool_alloc(mddev->flush_bio_pool, GFP_NOIO); | |
494 | fb->fi = fi; | |
495 | fb->rdev = rdev; | |
496 | ||
b5e1b8ce | 497 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
74d46992 | 498 | bio_set_dev(bi, rdev->bdev); |
5a409b4f XN |
499 | bi->bi_end_io = md_end_flush; |
500 | bi->bi_private = fb; | |
70fd7614 | 501 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
5a409b4f XN |
502 | |
503 | atomic_inc(&fi->flush_pending); | |
4e49ea4a | 504 | submit_bio(bi); |
5a409b4f | 505 | |
a2826aa9 N |
506 | rcu_read_lock(); |
507 | rdev_dec_pending(rdev, mddev); | |
508 | } | |
509 | rcu_read_unlock(); | |
a2826aa9 | 510 | |
5a409b4f XN |
511 | if (atomic_dec_and_test(&fi->flush_pending)) { |
512 | if (bio->bi_iter.bi_size == 0) | |
513 | /* an empty barrier - all done */ | |
514 | bio_endio(bio); | |
515 | else { | |
516 | INIT_WORK(&fi->flush_work, submit_flushes); | |
517 | queue_work(md_wq, &fi->flush_work); | |
518 | } | |
a2826aa9 | 519 | } |
a2826aa9 | 520 | } |
e9c7469b | 521 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 522 | |
fd01b88c | 523 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
524 | { |
525 | atomic_inc(&mddev->active); | |
526 | return mddev; | |
527 | } | |
528 | ||
5fd3a17e | 529 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 530 | |
fd01b88c | 531 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
532 | { |
533 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
534 | return; | |
d3374825 | 535 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
536 | mddev->ctime == 0 && !mddev->hold_active) { |
537 | /* Array is not configured at all, and not held active, | |
538 | * so destroy it */ | |
af8a2434 | 539 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
540 | |
541 | /* | |
542 | * Call queue_work inside the spinlock so that | |
543 | * flush_workqueue() after mddev_find will succeed in waiting | |
544 | * for the work to be done. | |
545 | */ | |
546 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
547 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
548 | } |
549 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
550 | } |
551 | ||
8376d3c1 | 552 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 553 | |
fd01b88c | 554 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 555 | { |
28dec870 | 556 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
557 | mutex_init(&mddev->open_mutex); |
558 | mutex_init(&mddev->reconfig_mutex); | |
559 | mutex_init(&mddev->bitmap_info.mutex); | |
560 | INIT_LIST_HEAD(&mddev->disks); | |
561 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 562 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
563 | atomic_set(&mddev->active, 1); |
564 | atomic_set(&mddev->openers, 0); | |
565 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 566 | spin_lock_init(&mddev->lock); |
fafd7fb0 N |
567 | init_waitqueue_head(&mddev->sb_wait); |
568 | init_waitqueue_head(&mddev->recovery_wait); | |
569 | mddev->reshape_position = MaxSector; | |
2c810cdd | 570 | mddev->reshape_backwards = 0; |
c4a39551 | 571 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
572 | mddev->resync_min = 0; |
573 | mddev->resync_max = MaxSector; | |
574 | mddev->level = LEVEL_NONE; | |
575 | } | |
390ee602 | 576 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 577 | |
f72ffdd6 | 578 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 579 | { |
fd01b88c | 580 | struct mddev *mddev, *new = NULL; |
1da177e4 | 581 | |
8f5f02c4 N |
582 | if (unit && MAJOR(unit) != MD_MAJOR) |
583 | unit &= ~((1<<MdpMinorShift)-1); | |
584 | ||
1da177e4 LT |
585 | retry: |
586 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
587 | |
588 | if (unit) { | |
589 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
590 | if (mddev->unit == unit) { | |
591 | mddev_get(mddev); | |
592 | spin_unlock(&all_mddevs_lock); | |
593 | kfree(new); | |
594 | return mddev; | |
595 | } | |
596 | ||
597 | if (new) { | |
598 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 599 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
600 | new->hold_active = UNTIL_IOCTL; |
601 | return new; | |
1da177e4 | 602 | } |
efeb53c0 N |
603 | } else if (new) { |
604 | /* find an unused unit number */ | |
605 | static int next_minor = 512; | |
606 | int start = next_minor; | |
607 | int is_free = 0; | |
608 | int dev = 0; | |
609 | while (!is_free) { | |
610 | dev = MKDEV(MD_MAJOR, next_minor); | |
611 | next_minor++; | |
612 | if (next_minor > MINORMASK) | |
613 | next_minor = 0; | |
614 | if (next_minor == start) { | |
615 | /* Oh dear, all in use. */ | |
616 | spin_unlock(&all_mddevs_lock); | |
617 | kfree(new); | |
618 | return NULL; | |
619 | } | |
f72ffdd6 | 620 | |
efeb53c0 N |
621 | is_free = 1; |
622 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
623 | if (mddev->unit == dev) { | |
624 | is_free = 0; | |
625 | break; | |
626 | } | |
627 | } | |
628 | new->unit = dev; | |
629 | new->md_minor = MINOR(dev); | |
630 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
631 | list_add(&new->all_mddevs, &all_mddevs); |
632 | spin_unlock(&all_mddevs_lock); | |
633 | return new; | |
634 | } | |
635 | spin_unlock(&all_mddevs_lock); | |
636 | ||
9ffae0cf | 637 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
638 | if (!new) |
639 | return NULL; | |
640 | ||
1da177e4 LT |
641 | new->unit = unit; |
642 | if (MAJOR(unit) == MD_MAJOR) | |
643 | new->md_minor = MINOR(unit); | |
644 | else | |
645 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
646 | ||
fafd7fb0 | 647 | mddev_init(new); |
1da177e4 | 648 | |
1da177e4 LT |
649 | goto retry; |
650 | } | |
651 | ||
b6eb127d N |
652 | static struct attribute_group md_redundancy_group; |
653 | ||
5c47daf6 | 654 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 655 | { |
a64c876f | 656 | if (mddev->to_remove) { |
b6eb127d N |
657 | /* These cannot be removed under reconfig_mutex as |
658 | * an access to the files will try to take reconfig_mutex | |
659 | * while holding the file unremovable, which leads to | |
660 | * a deadlock. | |
bb4f1e9d N |
661 | * So hold set sysfs_active while the remove in happeing, |
662 | * and anything else which might set ->to_remove or my | |
663 | * otherwise change the sysfs namespace will fail with | |
664 | * -EBUSY if sysfs_active is still set. | |
665 | * We set sysfs_active under reconfig_mutex and elsewhere | |
666 | * test it under the same mutex to ensure its correct value | |
667 | * is seen. | |
b6eb127d | 668 | */ |
a64c876f N |
669 | struct attribute_group *to_remove = mddev->to_remove; |
670 | mddev->to_remove = NULL; | |
bb4f1e9d | 671 | mddev->sysfs_active = 1; |
b6eb127d N |
672 | mutex_unlock(&mddev->reconfig_mutex); |
673 | ||
00bcb4ac N |
674 | if (mddev->kobj.sd) { |
675 | if (to_remove != &md_redundancy_group) | |
676 | sysfs_remove_group(&mddev->kobj, to_remove); | |
677 | if (mddev->pers == NULL || | |
678 | mddev->pers->sync_request == NULL) { | |
679 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
680 | if (mddev->sysfs_action) | |
681 | sysfs_put(mddev->sysfs_action); | |
682 | mddev->sysfs_action = NULL; | |
683 | } | |
a64c876f | 684 | } |
bb4f1e9d | 685 | mddev->sysfs_active = 0; |
b6eb127d N |
686 | } else |
687 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 688 | |
751e67ca CD |
689 | /* As we've dropped the mutex we need a spinlock to |
690 | * make sure the thread doesn't disappear | |
01f96c0a N |
691 | */ |
692 | spin_lock(&pers_lock); | |
005eca5e | 693 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 694 | wake_up(&mddev->sb_wait); |
01f96c0a | 695 | spin_unlock(&pers_lock); |
1da177e4 | 696 | } |
5c47daf6 | 697 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 698 | |
57d051dc | 699 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
700 | { |
701 | struct md_rdev *rdev; | |
702 | ||
703 | rdev_for_each_rcu(rdev, mddev) | |
704 | if (rdev->desc_nr == nr) | |
705 | return rdev; | |
706 | ||
707 | return NULL; | |
708 | } | |
57d051dc | 709 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
710 | |
711 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 712 | { |
3cb03002 | 713 | struct md_rdev *rdev; |
1da177e4 | 714 | |
dafb20fa | 715 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
716 | if (rdev->bdev->bd_dev == dev) |
717 | return rdev; | |
159ec1fc | 718 | |
1da177e4 LT |
719 | return NULL; |
720 | } | |
721 | ||
1532d9e8 | 722 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
723 | { |
724 | struct md_rdev *rdev; | |
725 | ||
726 | rdev_for_each_rcu(rdev, mddev) | |
727 | if (rdev->bdev->bd_dev == dev) | |
728 | return rdev; | |
729 | ||
730 | return NULL; | |
731 | } | |
1532d9e8 | 732 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 733 | |
84fc4b56 | 734 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 735 | { |
84fc4b56 | 736 | struct md_personality *pers; |
d9d166c2 N |
737 | list_for_each_entry(pers, &pers_list, list) { |
738 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 739 | return pers; |
d9d166c2 N |
740 | if (strcmp(pers->name, clevel)==0) |
741 | return pers; | |
742 | } | |
2604b703 N |
743 | return NULL; |
744 | } | |
745 | ||
b73df2d3 | 746 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 747 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 748 | { |
57b2caa3 | 749 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 750 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
751 | } |
752 | ||
f72ffdd6 | 753 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 754 | { |
1da177e4 | 755 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 756 | if (!rdev->sb_page) |
ebc24337 | 757 | return -ENOMEM; |
1da177e4 LT |
758 | return 0; |
759 | } | |
760 | ||
545c8795 | 761 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
762 | { |
763 | if (rdev->sb_page) { | |
2d1f3b5d | 764 | put_page(rdev->sb_page); |
1da177e4 LT |
765 | rdev->sb_loaded = 0; |
766 | rdev->sb_page = NULL; | |
0f420358 | 767 | rdev->sb_start = 0; |
dd8ac336 | 768 | rdev->sectors = 0; |
1da177e4 | 769 | } |
2699b672 N |
770 | if (rdev->bb_page) { |
771 | put_page(rdev->bb_page); | |
772 | rdev->bb_page = NULL; | |
773 | } | |
d3b407fb | 774 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 775 | } |
545c8795 | 776 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 777 | |
4246a0b6 | 778 | static void super_written(struct bio *bio) |
7bfa19f2 | 779 | { |
3cb03002 | 780 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 781 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 782 | |
4e4cbee9 CH |
783 | if (bio->bi_status) { |
784 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 785 | md_error(mddev, rdev); |
46533ff7 N |
786 | if (!test_bit(Faulty, &rdev->flags) |
787 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 788 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
789 | set_bit(LastDev, &rdev->flags); |
790 | } | |
791 | } else | |
792 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 793 | |
a9701a30 N |
794 | if (atomic_dec_and_test(&mddev->pending_writes)) |
795 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 796 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 797 | bio_put(bio); |
7bfa19f2 N |
798 | } |
799 | ||
fd01b88c | 800 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
801 | sector_t sector, int size, struct page *page) |
802 | { | |
803 | /* write first size bytes of page to sector of rdev | |
804 | * Increment mddev->pending_writes before returning | |
805 | * and decrement it on completion, waking up sb_wait | |
806 | * if zero is reached. | |
807 | * If an error occurred, call md_error | |
808 | */ | |
46533ff7 N |
809 | struct bio *bio; |
810 | int ff = 0; | |
811 | ||
4b6c1060 HM |
812 | if (!page) |
813 | return; | |
814 | ||
46533ff7 N |
815 | if (test_bit(Faulty, &rdev->flags)) |
816 | return; | |
817 | ||
5a85071c | 818 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 819 | |
ed3b98c7 SL |
820 | atomic_inc(&rdev->nr_pending); |
821 | ||
74d46992 | 822 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 823 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
824 | bio_add_page(bio, page, size, 0); |
825 | bio->bi_private = rdev; | |
826 | bio->bi_end_io = super_written; | |
46533ff7 N |
827 | |
828 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
829 | test_bit(FailFast, &rdev->flags) && | |
830 | !test_bit(LastDev, &rdev->flags)) | |
831 | ff = MD_FAILFAST; | |
5a8948f8 | 832 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 833 | |
7bfa19f2 | 834 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 835 | submit_bio(bio); |
a9701a30 N |
836 | } |
837 | ||
46533ff7 | 838 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 839 | { |
e9c7469b | 840 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 841 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 842 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
843 | return -EAGAIN; |
844 | return 0; | |
7bfa19f2 N |
845 | } |
846 | ||
3cb03002 | 847 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 848 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 849 | { |
5a85071c | 850 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
851 | int ret; |
852 | ||
74d46992 CH |
853 | if (metadata_op && rdev->meta_bdev) |
854 | bio_set_dev(bio, rdev->meta_bdev); | |
855 | else | |
856 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 857 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 858 | if (metadata_op) |
4f024f37 | 859 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
860 | else if (rdev->mddev->reshape_position != MaxSector && |
861 | (rdev->mddev->reshape_backwards == | |
862 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 863 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 864 | else |
4f024f37 | 865 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 866 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
867 | |
868 | submit_bio_wait(bio); | |
1da177e4 | 869 | |
4e4cbee9 | 870 | ret = !bio->bi_status; |
1da177e4 LT |
871 | bio_put(bio); |
872 | return ret; | |
873 | } | |
a8745db2 | 874 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 875 | |
f72ffdd6 | 876 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
877 | { |
878 | char b[BDEVNAME_SIZE]; | |
403df478 | 879 | |
1da177e4 LT |
880 | if (rdev->sb_loaded) |
881 | return 0; | |
882 | ||
796a5cf0 | 883 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
884 | goto fail; |
885 | rdev->sb_loaded = 1; | |
886 | return 0; | |
887 | ||
888 | fail: | |
9d48739e N |
889 | pr_err("md: disabled device %s, could not read superblock.\n", |
890 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
891 | return -EINVAL; |
892 | } | |
893 | ||
e6fd2093 | 894 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 895 | { |
f72ffdd6 | 896 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
897 | sb1->set_uuid1 == sb2->set_uuid1 && |
898 | sb1->set_uuid2 == sb2->set_uuid2 && | |
899 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
900 | } |
901 | ||
e6fd2093 | 902 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
903 | { |
904 | int ret; | |
905 | mdp_super_t *tmp1, *tmp2; | |
906 | ||
907 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
908 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
909 | ||
910 | if (!tmp1 || !tmp2) { | |
911 | ret = 0; | |
1da177e4 LT |
912 | goto abort; |
913 | } | |
914 | ||
915 | *tmp1 = *sb1; | |
916 | *tmp2 = *sb2; | |
917 | ||
918 | /* | |
919 | * nr_disks is not constant | |
920 | */ | |
921 | tmp1->nr_disks = 0; | |
922 | tmp2->nr_disks = 0; | |
923 | ||
ce0c8e05 | 924 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 925 | abort: |
990a8baf JJ |
926 | kfree(tmp1); |
927 | kfree(tmp2); | |
1da177e4 LT |
928 | return ret; |
929 | } | |
930 | ||
4d167f09 N |
931 | static u32 md_csum_fold(u32 csum) |
932 | { | |
933 | csum = (csum & 0xffff) + (csum >> 16); | |
934 | return (csum & 0xffff) + (csum >> 16); | |
935 | } | |
936 | ||
f72ffdd6 | 937 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 938 | { |
4d167f09 N |
939 | u64 newcsum = 0; |
940 | u32 *sb32 = (u32*)sb; | |
941 | int i; | |
1da177e4 LT |
942 | unsigned int disk_csum, csum; |
943 | ||
944 | disk_csum = sb->sb_csum; | |
945 | sb->sb_csum = 0; | |
4d167f09 N |
946 | |
947 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
948 | newcsum += sb32[i]; | |
949 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
950 | ||
4d167f09 N |
951 | #ifdef CONFIG_ALPHA |
952 | /* This used to use csum_partial, which was wrong for several | |
953 | * reasons including that different results are returned on | |
954 | * different architectures. It isn't critical that we get exactly | |
955 | * the same return value as before (we always csum_fold before | |
956 | * testing, and that removes any differences). However as we | |
957 | * know that csum_partial always returned a 16bit value on | |
958 | * alphas, do a fold to maximise conformity to previous behaviour. | |
959 | */ | |
960 | sb->sb_csum = md_csum_fold(disk_csum); | |
961 | #else | |
1da177e4 | 962 | sb->sb_csum = disk_csum; |
4d167f09 | 963 | #endif |
1da177e4 LT |
964 | return csum; |
965 | } | |
966 | ||
1da177e4 LT |
967 | /* |
968 | * Handle superblock details. | |
969 | * We want to be able to handle multiple superblock formats | |
970 | * so we have a common interface to them all, and an array of | |
971 | * different handlers. | |
972 | * We rely on user-space to write the initial superblock, and support | |
973 | * reading and updating of superblocks. | |
974 | * Interface methods are: | |
3cb03002 | 975 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
976 | * loads and validates a superblock on dev. |
977 | * if refdev != NULL, compare superblocks on both devices | |
978 | * Return: | |
979 | * 0 - dev has a superblock that is compatible with refdev | |
980 | * 1 - dev has a superblock that is compatible and newer than refdev | |
981 | * so dev should be used as the refdev in future | |
982 | * -EINVAL superblock incompatible or invalid | |
983 | * -othererror e.g. -EIO | |
984 | * | |
fd01b88c | 985 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
986 | * Verify that dev is acceptable into mddev. |
987 | * The first time, mddev->raid_disks will be 0, and data from | |
988 | * dev should be merged in. Subsequent calls check that dev | |
989 | * is new enough. Return 0 or -EINVAL | |
990 | * | |
fd01b88c | 991 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
992 | * Update the superblock for rdev with data in mddev |
993 | * This does not write to disc. | |
994 | * | |
995 | */ | |
996 | ||
997 | struct super_type { | |
0cd17fec CW |
998 | char *name; |
999 | struct module *owner; | |
c6563a8c N |
1000 | int (*load_super)(struct md_rdev *rdev, |
1001 | struct md_rdev *refdev, | |
0cd17fec | 1002 | int minor_version); |
c6563a8c N |
1003 | int (*validate_super)(struct mddev *mddev, |
1004 | struct md_rdev *rdev); | |
1005 | void (*sync_super)(struct mddev *mddev, | |
1006 | struct md_rdev *rdev); | |
3cb03002 | 1007 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1008 | sector_t num_sectors); |
c6563a8c N |
1009 | int (*allow_new_offset)(struct md_rdev *rdev, |
1010 | unsigned long long new_offset); | |
1da177e4 LT |
1011 | }; |
1012 | ||
0894cc30 AN |
1013 | /* |
1014 | * Check that the given mddev has no bitmap. | |
1015 | * | |
1016 | * This function is called from the run method of all personalities that do not | |
1017 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1018 | * has a bitmap. Otherwise, it returns 0. | |
1019 | * | |
1020 | */ | |
fd01b88c | 1021 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1022 | { |
c3d9714e | 1023 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1024 | return 0; |
9d48739e | 1025 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1026 | mdname(mddev), mddev->pers->name); |
1027 | return 1; | |
1028 | } | |
1029 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1030 | ||
1da177e4 | 1031 | /* |
f72ffdd6 | 1032 | * load_super for 0.90.0 |
1da177e4 | 1033 | */ |
3cb03002 | 1034 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1035 | { |
1036 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1037 | mdp_super_t *sb; | |
1038 | int ret; | |
1da177e4 LT |
1039 | |
1040 | /* | |
0f420358 | 1041 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1042 | * it's at the end of the disk. |
1043 | * | |
1044 | * It also happens to be a multiple of 4Kb. | |
1045 | */ | |
57b2caa3 | 1046 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1047 | |
0002b271 | 1048 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1049 | if (ret) |
1050 | return ret; | |
1da177e4 LT |
1051 | |
1052 | ret = -EINVAL; | |
1053 | ||
1054 | bdevname(rdev->bdev, b); | |
65a06f06 | 1055 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1056 | |
1057 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1058 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1059 | goto abort; |
1060 | } | |
1061 | ||
1062 | if (sb->major_version != 0 || | |
f6705578 N |
1063 | sb->minor_version < 90 || |
1064 | sb->minor_version > 91) { | |
9d48739e N |
1065 | pr_warn("Bad version number %d.%d on %s\n", |
1066 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1067 | goto abort; |
1068 | } | |
1069 | ||
1070 | if (sb->raid_disks <= 0) | |
1071 | goto abort; | |
1072 | ||
4d167f09 | 1073 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1074 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1075 | goto abort; |
1076 | } | |
1077 | ||
1078 | rdev->preferred_minor = sb->md_minor; | |
1079 | rdev->data_offset = 0; | |
c6563a8c | 1080 | rdev->new_data_offset = 0; |
0002b271 | 1081 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1082 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1083 | |
1084 | if (sb->level == LEVEL_MULTIPATH) | |
1085 | rdev->desc_nr = -1; | |
1086 | else | |
1087 | rdev->desc_nr = sb->this_disk.number; | |
1088 | ||
9a7b2b0f | 1089 | if (!refdev) { |
1da177e4 | 1090 | ret = 1; |
9a7b2b0f | 1091 | } else { |
1da177e4 | 1092 | __u64 ev1, ev2; |
65a06f06 | 1093 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1094 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1095 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1096 | b, bdevname(refdev->bdev,b2)); |
1097 | goto abort; | |
1098 | } | |
e6fd2093 | 1099 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1100 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1101 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1102 | goto abort; |
1103 | } | |
1104 | ev1 = md_event(sb); | |
1105 | ev2 = md_event(refsb); | |
1106 | if (ev1 > ev2) | |
1107 | ret = 1; | |
f72ffdd6 | 1108 | else |
1da177e4 LT |
1109 | ret = 0; |
1110 | } | |
8190e754 | 1111 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1112 | /* Limit to 4TB as metadata cannot record more than that. |
1113 | * (not needed for Linear and RAID0 as metadata doesn't | |
1114 | * record this size) | |
1115 | */ | |
3312c951 AB |
1116 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)rdev->sectors >= (2ULL << 32) && |
1117 | sb->level >= 1) | |
1118 | rdev->sectors = (sector_t)(2ULL << 32) - 2; | |
1da177e4 | 1119 | |
27a7b260 | 1120 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1121 | /* "this cannot possibly happen" ... */ |
1122 | ret = -EINVAL; | |
1123 | ||
1da177e4 LT |
1124 | abort: |
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * validate_super for 0.90.0 | |
1130 | */ | |
fd01b88c | 1131 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1132 | { |
1133 | mdp_disk_t *desc; | |
65a06f06 | 1134 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1135 | __u64 ev1 = md_event(sb); |
1da177e4 | 1136 | |
41158c7e | 1137 | rdev->raid_disk = -1; |
c5d79adb N |
1138 | clear_bit(Faulty, &rdev->flags); |
1139 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1140 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1141 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1142 | |
1da177e4 LT |
1143 | if (mddev->raid_disks == 0) { |
1144 | mddev->major_version = 0; | |
1145 | mddev->minor_version = sb->minor_version; | |
1146 | mddev->patch_version = sb->patch_version; | |
e691063a | 1147 | mddev->external = 0; |
9d8f0363 | 1148 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1149 | mddev->ctime = sb->ctime; |
1150 | mddev->utime = sb->utime; | |
1151 | mddev->level = sb->level; | |
d9d166c2 | 1152 | mddev->clevel[0] = 0; |
1da177e4 LT |
1153 | mddev->layout = sb->layout; |
1154 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1155 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1156 | mddev->events = ev1; |
c3d9714e | 1157 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1158 | mddev->bitmap_info.space = 0; |
1159 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1160 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1161 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1162 | mddev->reshape_backwards = 0; |
1da177e4 | 1163 | |
f6705578 N |
1164 | if (mddev->minor_version >= 91) { |
1165 | mddev->reshape_position = sb->reshape_position; | |
1166 | mddev->delta_disks = sb->delta_disks; | |
1167 | mddev->new_level = sb->new_level; | |
1168 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1169 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1170 | if (mddev->delta_disks < 0) |
1171 | mddev->reshape_backwards = 1; | |
f6705578 N |
1172 | } else { |
1173 | mddev->reshape_position = MaxSector; | |
1174 | mddev->delta_disks = 0; | |
1175 | mddev->new_level = mddev->level; | |
1176 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1177 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1178 | } |
1179 | ||
1da177e4 LT |
1180 | if (sb->state & (1<<MD_SB_CLEAN)) |
1181 | mddev->recovery_cp = MaxSector; | |
1182 | else { | |
f72ffdd6 | 1183 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1184 | sb->events_lo == sb->cp_events_lo) { |
1185 | mddev->recovery_cp = sb->recovery_cp; | |
1186 | } else | |
1187 | mddev->recovery_cp = 0; | |
1188 | } | |
1189 | ||
1190 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1191 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1192 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1193 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1194 | ||
1195 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1196 | |
1197 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1198 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1199 | mddev->bitmap_info.offset = |
1200 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1201 | mddev->bitmap_info.space = |
c9ad020f | 1202 | mddev->bitmap_info.default_space; |
6409bb05 | 1203 | } |
a654b9d8 | 1204 | |
41158c7e | 1205 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1206 | /* Insist on good event counter while assembling, except |
1207 | * for spares (which don't need an event count) */ | |
1da177e4 | 1208 | ++ev1; |
be6800a7 N |
1209 | if (sb->disks[rdev->desc_nr].state & ( |
1210 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1211 | if (ev1 < mddev->events) |
be6800a7 | 1212 | return -EINVAL; |
41158c7e N |
1213 | } else if (mddev->bitmap) { |
1214 | /* if adding to array with a bitmap, then we can accept an | |
1215 | * older device ... but not too old. | |
1216 | */ | |
41158c7e N |
1217 | if (ev1 < mddev->bitmap->events_cleared) |
1218 | return 0; | |
8313b8e5 N |
1219 | if (ev1 < mddev->events) |
1220 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1221 | } else { |
1222 | if (ev1 < mddev->events) | |
1223 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1224 | return 0; | |
1225 | } | |
41158c7e | 1226 | |
1da177e4 | 1227 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1228 | desc = sb->disks + rdev->desc_nr; |
1229 | ||
1230 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1231 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1232 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1233 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1234 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1235 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1236 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1237 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1238 | /* active but not in sync implies recovery up to | |
1239 | * reshape position. We don't know exactly where | |
1240 | * that is, so set to zero for now */ | |
1241 | if (mddev->minor_version >= 91) { | |
1242 | rdev->recovery_offset = 0; | |
1243 | rdev->raid_disk = desc->raid_disk; | |
1244 | } | |
1da177e4 | 1245 | } |
8ddf9efe N |
1246 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1247 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1248 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1249 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1250 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1251 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1252 | return 0; |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * sync_super for 0.90.0 | |
1257 | */ | |
fd01b88c | 1258 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1259 | { |
1260 | mdp_super_t *sb; | |
3cb03002 | 1261 | struct md_rdev *rdev2; |
1da177e4 | 1262 | int next_spare = mddev->raid_disks; |
19133a42 | 1263 | |
1da177e4 LT |
1264 | /* make rdev->sb match mddev data.. |
1265 | * | |
1266 | * 1/ zero out disks | |
1267 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1268 | * 3/ any empty disks < next_spare become removed | |
1269 | * | |
1270 | * disks[0] gets initialised to REMOVED because | |
1271 | * we cannot be sure from other fields if it has | |
1272 | * been initialised or not. | |
1273 | */ | |
1274 | int i; | |
1275 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1276 | ||
61181565 N |
1277 | rdev->sb_size = MD_SB_BYTES; |
1278 | ||
65a06f06 | 1279 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1280 | |
1281 | memset(sb, 0, sizeof(*sb)); | |
1282 | ||
1283 | sb->md_magic = MD_SB_MAGIC; | |
1284 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1285 | sb->patch_version = mddev->patch_version; |
1286 | sb->gvalid_words = 0; /* ignored */ | |
1287 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1288 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1289 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1290 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1291 | ||
9ebc6ef1 | 1292 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1293 | sb->level = mddev->level; |
58c0fed4 | 1294 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1295 | sb->raid_disks = mddev->raid_disks; |
1296 | sb->md_minor = mddev->md_minor; | |
e691063a | 1297 | sb->not_persistent = 0; |
9ebc6ef1 | 1298 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1299 | sb->state = 0; |
1300 | sb->events_hi = (mddev->events>>32); | |
1301 | sb->events_lo = (u32)mddev->events; | |
1302 | ||
f6705578 N |
1303 | if (mddev->reshape_position == MaxSector) |
1304 | sb->minor_version = 90; | |
1305 | else { | |
1306 | sb->minor_version = 91; | |
1307 | sb->reshape_position = mddev->reshape_position; | |
1308 | sb->new_level = mddev->new_level; | |
1309 | sb->delta_disks = mddev->delta_disks; | |
1310 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1311 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1312 | } |
1313 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1314 | if (mddev->in_sync) |
1315 | { | |
1316 | sb->recovery_cp = mddev->recovery_cp; | |
1317 | sb->cp_events_hi = (mddev->events>>32); | |
1318 | sb->cp_events_lo = (u32)mddev->events; | |
1319 | if (mddev->recovery_cp == MaxSector) | |
1320 | sb->state = (1<< MD_SB_CLEAN); | |
1321 | } else | |
1322 | sb->recovery_cp = 0; | |
1323 | ||
1324 | sb->layout = mddev->layout; | |
9d8f0363 | 1325 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1326 | |
c3d9714e | 1327 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1328 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1329 | ||
1da177e4 | 1330 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1331 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1332 | mdp_disk_t *d; |
86e6ffdd | 1333 | int desc_nr; |
0261cd9f N |
1334 | int is_active = test_bit(In_sync, &rdev2->flags); |
1335 | ||
1336 | if (rdev2->raid_disk >= 0 && | |
1337 | sb->minor_version >= 91) | |
1338 | /* we have nowhere to store the recovery_offset, | |
1339 | * but if it is not below the reshape_position, | |
1340 | * we can piggy-back on that. | |
1341 | */ | |
1342 | is_active = 1; | |
1343 | if (rdev2->raid_disk < 0 || | |
1344 | test_bit(Faulty, &rdev2->flags)) | |
1345 | is_active = 0; | |
1346 | if (is_active) | |
86e6ffdd | 1347 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1348 | else |
86e6ffdd | 1349 | desc_nr = next_spare++; |
19133a42 | 1350 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1351 | d = &sb->disks[rdev2->desc_nr]; |
1352 | nr_disks++; | |
1353 | d->number = rdev2->desc_nr; | |
1354 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1355 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1356 | if (is_active) |
1da177e4 LT |
1357 | d->raid_disk = rdev2->raid_disk; |
1358 | else | |
1359 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1360 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1361 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1362 | else if (is_active) { |
1da177e4 | 1363 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1364 | if (test_bit(In_sync, &rdev2->flags)) |
1365 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1366 | active++; |
1367 | working++; | |
1368 | } else { | |
1369 | d->state = 0; | |
1370 | spare++; | |
1371 | working++; | |
1372 | } | |
8ddf9efe N |
1373 | if (test_bit(WriteMostly, &rdev2->flags)) |
1374 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1375 | if (test_bit(FailFast, &rdev2->flags)) |
1376 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1377 | } |
1da177e4 LT |
1378 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1379 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1380 | mdp_disk_t *d = &sb->disks[i]; | |
1381 | if (d->state == 0 && d->number == 0) { | |
1382 | d->number = i; | |
1383 | d->raid_disk = i; | |
1384 | d->state = (1<<MD_DISK_REMOVED); | |
1385 | d->state |= (1<<MD_DISK_FAULTY); | |
1386 | failed++; | |
1387 | } | |
1388 | } | |
1389 | sb->nr_disks = nr_disks; | |
1390 | sb->active_disks = active; | |
1391 | sb->working_disks = working; | |
1392 | sb->failed_disks = failed; | |
1393 | sb->spare_disks = spare; | |
1394 | ||
1395 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1396 | sb->sb_csum = calc_sb_csum(sb); | |
1397 | } | |
1398 | ||
0cd17fec CW |
1399 | /* |
1400 | * rdev_size_change for 0.90.0 | |
1401 | */ | |
1402 | static unsigned long long | |
3cb03002 | 1403 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1404 | { |
58c0fed4 | 1405 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1406 | return 0; /* component must fit device */ |
c3d9714e | 1407 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1408 | return 0; /* can't move bitmap */ |
57b2caa3 | 1409 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1410 | if (!num_sectors || num_sectors > rdev->sb_start) |
1411 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1412 | /* Limit to 4TB as metadata cannot record more than that. |
1413 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1414 | */ | |
3312c951 AB |
1415 | if (IS_ENABLED(CONFIG_LBDAF) && (u64)num_sectors >= (2ULL << 32) && |
1416 | rdev->mddev->level >= 1) | |
1417 | num_sectors = (sector_t)(2ULL << 32) - 2; | |
46533ff7 N |
1418 | do { |
1419 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1420 | rdev->sb_page); |
46533ff7 | 1421 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1422 | return num_sectors; |
0cd17fec CW |
1423 | } |
1424 | ||
c6563a8c N |
1425 | static int |
1426 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1427 | { | |
1428 | /* non-zero offset changes not possible with v0.90 */ | |
1429 | return new_offset == 0; | |
1430 | } | |
0cd17fec | 1431 | |
1da177e4 LT |
1432 | /* |
1433 | * version 1 superblock | |
1434 | */ | |
1435 | ||
f72ffdd6 | 1436 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1437 | { |
1c05b4bc N |
1438 | __le32 disk_csum; |
1439 | u32 csum; | |
1da177e4 LT |
1440 | unsigned long long newcsum; |
1441 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1442 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1443 | |
1444 | disk_csum = sb->sb_csum; | |
1445 | sb->sb_csum = 0; | |
1446 | newcsum = 0; | |
1f3c9907 | 1447 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1448 | newcsum += le32_to_cpu(*isuper++); |
1449 | ||
1450 | if (size == 2) | |
1c05b4bc | 1451 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1452 | |
1453 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1454 | sb->sb_csum = disk_csum; | |
1455 | return cpu_to_le32(csum); | |
1456 | } | |
1457 | ||
3cb03002 | 1458 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1459 | { |
1460 | struct mdp_superblock_1 *sb; | |
1461 | int ret; | |
0f420358 | 1462 | sector_t sb_start; |
c6563a8c | 1463 | sector_t sectors; |
1da177e4 | 1464 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1465 | int bmask; |
1da177e4 LT |
1466 | |
1467 | /* | |
0f420358 | 1468 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1469 | * It is always aligned to a 4K boundary and |
1470 | * depeding on minor_version, it can be: | |
1471 | * 0: At least 8K, but less than 12K, from end of device | |
1472 | * 1: At start of device | |
1473 | * 2: 4K from start of device. | |
1474 | */ | |
1475 | switch(minor_version) { | |
1476 | case 0: | |
77304d2a | 1477 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1478 | sb_start -= 8*2; |
1479 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1480 | break; |
1481 | case 1: | |
0f420358 | 1482 | sb_start = 0; |
1da177e4 LT |
1483 | break; |
1484 | case 2: | |
0f420358 | 1485 | sb_start = 8; |
1da177e4 LT |
1486 | break; |
1487 | default: | |
1488 | return -EINVAL; | |
1489 | } | |
0f420358 | 1490 | rdev->sb_start = sb_start; |
1da177e4 | 1491 | |
0002b271 N |
1492 | /* superblock is rarely larger than 1K, but it can be larger, |
1493 | * and it is safe to read 4k, so we do that | |
1494 | */ | |
1495 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1496 | if (ret) return ret; |
1497 | ||
65a06f06 | 1498 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1499 | |
1500 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1501 | sb->major_version != cpu_to_le32(1) || | |
1502 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1503 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1504 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1505 | return -EINVAL; |
1506 | ||
1507 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1508 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1509 | bdevname(rdev->bdev,b)); |
1510 | return -EINVAL; | |
1511 | } | |
1512 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1513 | pr_warn("md: data_size too small on %s\n", |
1514 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1515 | return -EINVAL; |
1516 | } | |
c6563a8c N |
1517 | if (sb->pad0 || |
1518 | sb->pad3[0] || | |
1519 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1520 | /* Some padding is non-zero, might be a new feature */ | |
1521 | return -EINVAL; | |
e11e93fa | 1522 | |
1da177e4 LT |
1523 | rdev->preferred_minor = 0xffff; |
1524 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1525 | rdev->new_data_offset = rdev->data_offset; |
1526 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1527 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1528 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1529 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1530 | |
0002b271 | 1531 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1532 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1533 | if (rdev->sb_size & bmask) |
a1801f85 N |
1534 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1535 | ||
1536 | if (minor_version | |
0f420358 | 1537 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1538 | return -EINVAL; |
c6563a8c N |
1539 | if (minor_version |
1540 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1541 | return -EINVAL; | |
0002b271 | 1542 | |
31b65a0d N |
1543 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1544 | rdev->desc_nr = -1; | |
1545 | else | |
1546 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1547 | ||
2699b672 N |
1548 | if (!rdev->bb_page) { |
1549 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1550 | if (!rdev->bb_page) | |
1551 | return -ENOMEM; | |
1552 | } | |
1553 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1554 | rdev->badblocks.count == 0) { | |
1555 | /* need to load the bad block list. | |
1556 | * Currently we limit it to one page. | |
1557 | */ | |
1558 | s32 offset; | |
1559 | sector_t bb_sector; | |
1560 | u64 *bbp; | |
1561 | int i; | |
1562 | int sectors = le16_to_cpu(sb->bblog_size); | |
1563 | if (sectors > (PAGE_SIZE / 512)) | |
1564 | return -EINVAL; | |
1565 | offset = le32_to_cpu(sb->bblog_offset); | |
1566 | if (offset == 0) | |
1567 | return -EINVAL; | |
1568 | bb_sector = (long long)offset; | |
1569 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1570 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 N |
1571 | return -EIO; |
1572 | bbp = (u64 *)page_address(rdev->bb_page); | |
1573 | rdev->badblocks.shift = sb->bblog_shift; | |
1574 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1575 | u64 bb = le64_to_cpu(*bbp); | |
1576 | int count = bb & (0x3ff); | |
1577 | u64 sector = bb >> 10; | |
1578 | sector <<= sb->bblog_shift; | |
1579 | count <<= sb->bblog_shift; | |
1580 | if (bb + 1 == 0) | |
1581 | break; | |
fc974ee2 | 1582 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1583 | return -EINVAL; |
1584 | } | |
486adf72 N |
1585 | } else if (sb->bblog_offset != 0) |
1586 | rdev->badblocks.shift = 0; | |
2699b672 | 1587 | |
ddc08823 PB |
1588 | if ((le32_to_cpu(sb->feature_map) & |
1589 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1590 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1591 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1592 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1593 | } | |
1594 | ||
9a7b2b0f | 1595 | if (!refdev) { |
8ed75463 | 1596 | ret = 1; |
9a7b2b0f | 1597 | } else { |
1da177e4 | 1598 | __u64 ev1, ev2; |
65a06f06 | 1599 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1600 | |
1601 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1602 | sb->level != refsb->level || | |
1603 | sb->layout != refsb->layout || | |
1604 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1605 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1606 | bdevname(rdev->bdev,b), |
1607 | bdevname(refdev->bdev,b2)); | |
1608 | return -EINVAL; | |
1609 | } | |
1610 | ev1 = le64_to_cpu(sb->events); | |
1611 | ev2 = le64_to_cpu(refsb->events); | |
1612 | ||
1613 | if (ev1 > ev2) | |
8ed75463 N |
1614 | ret = 1; |
1615 | else | |
1616 | ret = 0; | |
1da177e4 | 1617 | } |
c6563a8c N |
1618 | if (minor_version) { |
1619 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1620 | sectors -= rdev->data_offset; | |
1621 | } else | |
1622 | sectors = rdev->sb_start; | |
1623 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1624 | return -EINVAL; |
dd8ac336 | 1625 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1626 | return ret; |
1da177e4 LT |
1627 | } |
1628 | ||
fd01b88c | 1629 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1630 | { |
65a06f06 | 1631 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1632 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1633 | |
41158c7e | 1634 | rdev->raid_disk = -1; |
c5d79adb N |
1635 | clear_bit(Faulty, &rdev->flags); |
1636 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1637 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1638 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1639 | |
1da177e4 LT |
1640 | if (mddev->raid_disks == 0) { |
1641 | mddev->major_version = 1; | |
1642 | mddev->patch_version = 0; | |
e691063a | 1643 | mddev->external = 0; |
9d8f0363 | 1644 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1645 | mddev->ctime = le64_to_cpu(sb->ctime); |
1646 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1647 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1648 | mddev->clevel[0] = 0; |
1da177e4 LT |
1649 | mddev->layout = le32_to_cpu(sb->layout); |
1650 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1651 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1652 | mddev->events = ev1; |
c3d9714e | 1653 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1654 | mddev->bitmap_info.space = 0; |
1655 | /* Default location for bitmap is 1K after superblock | |
1656 | * using 3K - total of 4K | |
1657 | */ | |
c3d9714e | 1658 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1659 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1660 | mddev->reshape_backwards = 0; |
1661 | ||
1da177e4 LT |
1662 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1663 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1664 | ||
1665 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1666 | |
71c0805c | 1667 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1668 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1669 | mddev->bitmap_info.offset = |
1670 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1671 | /* Metadata doesn't record how much space is available. |
1672 | * For 1.0, we assume we can use up to the superblock | |
1673 | * if before, else to 4K beyond superblock. | |
1674 | * For others, assume no change is possible. | |
1675 | */ | |
1676 | if (mddev->minor_version > 0) | |
1677 | mddev->bitmap_info.space = 0; | |
1678 | else if (mddev->bitmap_info.offset > 0) | |
1679 | mddev->bitmap_info.space = | |
1680 | 8 - mddev->bitmap_info.offset; | |
1681 | else | |
1682 | mddev->bitmap_info.space = | |
1683 | -mddev->bitmap_info.offset; | |
1684 | } | |
e11e93fa | 1685 | |
f6705578 N |
1686 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1687 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1688 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1689 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1690 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1691 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1692 | if (mddev->delta_disks < 0 || |
1693 | (mddev->delta_disks == 0 && | |
1694 | (le32_to_cpu(sb->feature_map) | |
1695 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1696 | mddev->reshape_backwards = 1; | |
f6705578 N |
1697 | } else { |
1698 | mddev->reshape_position = MaxSector; | |
1699 | mddev->delta_disks = 0; | |
1700 | mddev->new_level = mddev->level; | |
1701 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1702 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1703 | } |
1704 | ||
486b0f7b | 1705 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1706 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1707 | |
ddc08823 PB |
1708 | if (le32_to_cpu(sb->feature_map) & |
1709 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1710 | if (le32_to_cpu(sb->feature_map) & |
1711 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1712 | return -EINVAL; | |
ddc08823 PB |
1713 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1714 | (le32_to_cpu(sb->feature_map) & | |
1715 | MD_FEATURE_MULTIPLE_PPLS)) | |
1716 | return -EINVAL; | |
ea0213e0 AP |
1717 | set_bit(MD_HAS_PPL, &mddev->flags); |
1718 | } | |
41158c7e | 1719 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1720 | /* Insist of good event counter while assembling, except for |
1721 | * spares (which don't need an event count) */ | |
1da177e4 | 1722 | ++ev1; |
be6800a7 N |
1723 | if (rdev->desc_nr >= 0 && |
1724 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1725 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1726 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1727 | if (ev1 < mddev->events) |
1728 | return -EINVAL; | |
41158c7e N |
1729 | } else if (mddev->bitmap) { |
1730 | /* If adding to array with a bitmap, then we can accept an | |
1731 | * older device, but not too old. | |
1732 | */ | |
41158c7e N |
1733 | if (ev1 < mddev->bitmap->events_cleared) |
1734 | return 0; | |
8313b8e5 N |
1735 | if (ev1 < mddev->events) |
1736 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1737 | } else { |
1738 | if (ev1 < mddev->events) | |
1739 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1740 | return 0; | |
1741 | } | |
1da177e4 LT |
1742 | if (mddev->level != LEVEL_MULTIPATH) { |
1743 | int role; | |
3673f305 N |
1744 | if (rdev->desc_nr < 0 || |
1745 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1746 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1747 | rdev->desc_nr = -1; |
1748 | } else | |
1749 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1750 | switch(role) { |
c4d4c91b | 1751 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1752 | break; |
c4d4c91b | 1753 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1754 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1755 | break; |
bac624f3 SL |
1756 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1757 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1758 | /* journal device without journal feature */ | |
9d48739e | 1759 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1760 | return -EINVAL; |
1761 | } | |
1762 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1763 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1764 | rdev->raid_disk = 0; |
bac624f3 | 1765 | break; |
1da177e4 | 1766 | default: |
f466722c | 1767 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1768 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1769 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1770 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1771 | if (!(le32_to_cpu(sb->feature_map) & |
1772 | MD_FEATURE_RECOVERY_BITMAP)) | |
1773 | rdev->saved_raid_disk = -1; | |
1774 | } else | |
5fd6c1dc | 1775 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1776 | rdev->raid_disk = role; |
1777 | break; | |
1778 | } | |
8ddf9efe N |
1779 | if (sb->devflags & WriteMostly1) |
1780 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1781 | if (sb->devflags & FailFast1) |
1782 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1783 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1784 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1785 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1786 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1787 | |
1da177e4 LT |
1788 | return 0; |
1789 | } | |
1790 | ||
fd01b88c | 1791 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1792 | { |
1793 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1794 | struct md_rdev *rdev2; |
1da177e4 LT |
1795 | int max_dev, i; |
1796 | /* make rdev->sb match mddev and rdev data. */ | |
1797 | ||
65a06f06 | 1798 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1799 | |
1800 | sb->feature_map = 0; | |
1801 | sb->pad0 = 0; | |
5fd6c1dc | 1802 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1803 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1804 | ||
1805 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1806 | sb->events = cpu_to_le64(mddev->events); | |
1807 | if (mddev->in_sync) | |
1808 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1809 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1810 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1811 | else |
1812 | sb->resync_offset = cpu_to_le64(0); | |
1813 | ||
1c05b4bc | 1814 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1815 | |
f0ca340c | 1816 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1817 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1818 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1819 | sb->level = cpu_to_le32(mddev->level); |
1820 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1821 | if (test_bit(FailFast, &rdev->flags)) |
1822 | sb->devflags |= FailFast1; | |
1823 | else | |
1824 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1825 | |
aeb9b211 N |
1826 | if (test_bit(WriteMostly, &rdev->flags)) |
1827 | sb->devflags |= WriteMostly1; | |
1828 | else | |
1829 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1830 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1831 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1832 | |
c3d9714e N |
1833 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1834 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1835 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1836 | } |
5fd6c1dc | 1837 | |
f2076e7d | 1838 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1839 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1840 | sb->feature_map |= |
1841 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1842 | sb->recovery_offset = | |
1843 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1844 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1845 | sb->feature_map |= | |
1846 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1847 | } |
3069aa8d SL |
1848 | /* Note: recovery_offset and journal_tail share space */ |
1849 | if (test_bit(Journal, &rdev->flags)) | |
1850 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1851 | if (test_bit(Replacement, &rdev->flags)) |
1852 | sb->feature_map |= | |
1853 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1854 | |
f6705578 N |
1855 | if (mddev->reshape_position != MaxSector) { |
1856 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1857 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1858 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1859 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1860 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1861 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1862 | if (mddev->delta_disks == 0 && |
1863 | mddev->reshape_backwards) | |
1864 | sb->feature_map | |
1865 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1866 | if (rdev->new_data_offset != rdev->data_offset) { |
1867 | sb->feature_map | |
1868 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1869 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1870 | - rdev->data_offset)); | |
1871 | } | |
f6705578 | 1872 | } |
a654b9d8 | 1873 | |
3c462c88 GR |
1874 | if (mddev_is_clustered(mddev)) |
1875 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1876 | ||
2699b672 N |
1877 | if (rdev->badblocks.count == 0) |
1878 | /* Nothing to do for bad blocks*/ ; | |
1879 | else if (sb->bblog_offset == 0) | |
1880 | /* Cannot record bad blocks on this device */ | |
1881 | md_error(mddev, rdev); | |
1882 | else { | |
1883 | struct badblocks *bb = &rdev->badblocks; | |
1884 | u64 *bbp = (u64 *)page_address(rdev->bb_page); | |
1885 | u64 *p = bb->page; | |
1886 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1887 | if (bb->changed) { | |
1888 | unsigned seq; | |
1889 | ||
1890 | retry: | |
1891 | seq = read_seqbegin(&bb->lock); | |
1892 | ||
1893 | memset(bbp, 0xff, PAGE_SIZE); | |
1894 | ||
1895 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1896 | u64 internal_bb = p[i]; |
2699b672 N |
1897 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1898 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1899 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1900 | } |
d0962936 | 1901 | bb->changed = 0; |
2699b672 N |
1902 | if (read_seqretry(&bb->lock, seq)) |
1903 | goto retry; | |
1904 | ||
1905 | bb->sector = (rdev->sb_start + | |
1906 | (int)le32_to_cpu(sb->bblog_offset)); | |
1907 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1908 | } |
1909 | } | |
1910 | ||
1da177e4 | 1911 | max_dev = 0; |
dafb20fa | 1912 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1913 | if (rdev2->desc_nr+1 > max_dev) |
1914 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1915 | |
70471daf N |
1916 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
1917 | int bmask; | |
a778b73f | 1918 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
1919 | rdev->sb_size = max_dev * 2 + 256; |
1920 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
1921 | if (rdev->sb_size & bmask) | |
1922 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
1923 | } else |
1924 | max_dev = le32_to_cpu(sb->max_dev); | |
1925 | ||
1da177e4 | 1926 | for (i=0; i<max_dev;i++) |
8df72024 | 1927 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 1928 | |
a97b7896 SL |
1929 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
1930 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 1931 | |
ea0213e0 | 1932 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
1933 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
1934 | sb->feature_map |= | |
1935 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
1936 | else | |
1937 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
1938 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
1939 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
1940 | } | |
1941 | ||
dafb20fa | 1942 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1943 | i = rdev2->desc_nr; |
b2d444d7 | 1944 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 1945 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 1946 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 1947 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 1948 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 1949 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 1950 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 1951 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 1952 | else |
c4d4c91b | 1953 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
1954 | } |
1955 | ||
1da177e4 LT |
1956 | sb->sb_csum = calc_sb_1_csum(sb); |
1957 | } | |
1958 | ||
0cd17fec | 1959 | static unsigned long long |
3cb03002 | 1960 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
1961 | { |
1962 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 1963 | sector_t max_sectors; |
58c0fed4 | 1964 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1965 | return 0; /* component must fit device */ |
c6563a8c N |
1966 | if (rdev->data_offset != rdev->new_data_offset) |
1967 | return 0; /* too confusing */ | |
0f420358 | 1968 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 1969 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 1970 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
1971 | max_sectors -= rdev->data_offset; |
1972 | if (!num_sectors || num_sectors > max_sectors) | |
1973 | num_sectors = max_sectors; | |
c3d9714e | 1974 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
1975 | /* minor version 0 with bitmap we can't move */ |
1976 | return 0; | |
1977 | } else { | |
1978 | /* minor version 0; superblock after data */ | |
0f420358 | 1979 | sector_t sb_start; |
77304d2a | 1980 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 1981 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 1982 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
1983 | if (!num_sectors || num_sectors > max_sectors) |
1984 | num_sectors = max_sectors; | |
0f420358 | 1985 | rdev->sb_start = sb_start; |
0cd17fec | 1986 | } |
65a06f06 | 1987 | sb = page_address(rdev->sb_page); |
15f4a5fd | 1988 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 1989 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 1990 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
1991 | do { |
1992 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
1993 | rdev->sb_page); | |
1994 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 1995 | return num_sectors; |
c6563a8c N |
1996 | |
1997 | } | |
1998 | ||
1999 | static int | |
2000 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2001 | unsigned long long new_offset) | |
2002 | { | |
2003 | /* All necessary checks on new >= old have been done */ | |
2004 | struct bitmap *bitmap; | |
2005 | if (new_offset >= rdev->data_offset) | |
2006 | return 1; | |
2007 | ||
2008 | /* with 1.0 metadata, there is no metadata to tread on | |
2009 | * so we can always move back */ | |
2010 | if (rdev->mddev->minor_version == 0) | |
2011 | return 1; | |
2012 | ||
2013 | /* otherwise we must be sure not to step on | |
2014 | * any metadata, so stay: | |
2015 | * 36K beyond start of superblock | |
2016 | * beyond end of badblocks | |
2017 | * beyond write-intent bitmap | |
2018 | */ | |
2019 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2020 | return 0; | |
2021 | bitmap = rdev->mddev->bitmap; | |
2022 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2023 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2024 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2025 | return 0; |
2026 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2027 | return 0; | |
2028 | ||
2029 | return 1; | |
0cd17fec | 2030 | } |
1da177e4 | 2031 | |
75c96f85 | 2032 | static struct super_type super_types[] = { |
1da177e4 LT |
2033 | [0] = { |
2034 | .name = "0.90.0", | |
2035 | .owner = THIS_MODULE, | |
0cd17fec CW |
2036 | .load_super = super_90_load, |
2037 | .validate_super = super_90_validate, | |
2038 | .sync_super = super_90_sync, | |
2039 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2040 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2041 | }, |
2042 | [1] = { | |
2043 | .name = "md-1", | |
2044 | .owner = THIS_MODULE, | |
0cd17fec CW |
2045 | .load_super = super_1_load, |
2046 | .validate_super = super_1_validate, | |
2047 | .sync_super = super_1_sync, | |
2048 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2049 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2050 | }, |
2051 | }; | |
1da177e4 | 2052 | |
fd01b88c | 2053 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2054 | { |
2055 | if (mddev->sync_super) { | |
2056 | mddev->sync_super(mddev, rdev); | |
2057 | return; | |
2058 | } | |
2059 | ||
2060 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2061 | ||
2062 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2063 | } | |
2064 | ||
fd01b88c | 2065 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2066 | { |
3cb03002 | 2067 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2068 | |
4b80991c | 2069 | rcu_read_lock(); |
0b020e85 SL |
2070 | rdev_for_each_rcu(rdev, mddev1) { |
2071 | if (test_bit(Faulty, &rdev->flags) || | |
2072 | test_bit(Journal, &rdev->flags) || | |
2073 | rdev->raid_disk == -1) | |
2074 | continue; | |
2075 | rdev_for_each_rcu(rdev2, mddev2) { | |
2076 | if (test_bit(Faulty, &rdev2->flags) || | |
2077 | test_bit(Journal, &rdev2->flags) || | |
2078 | rdev2->raid_disk == -1) | |
2079 | continue; | |
7dd5e7c3 | 2080 | if (rdev->bdev->bd_contains == |
4b80991c N |
2081 | rdev2->bdev->bd_contains) { |
2082 | rcu_read_unlock(); | |
7dd5e7c3 | 2083 | return 1; |
4b80991c | 2084 | } |
0b020e85 SL |
2085 | } |
2086 | } | |
4b80991c | 2087 | rcu_read_unlock(); |
1da177e4 LT |
2088 | return 0; |
2089 | } | |
2090 | ||
2091 | static LIST_HEAD(pending_raid_disks); | |
2092 | ||
ac5e7113 AN |
2093 | /* |
2094 | * Try to register data integrity profile for an mddev | |
2095 | * | |
2096 | * This is called when an array is started and after a disk has been kicked | |
2097 | * from the array. It only succeeds if all working and active component devices | |
2098 | * are integrity capable with matching profiles. | |
2099 | */ | |
fd01b88c | 2100 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2101 | { |
3cb03002 | 2102 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2103 | |
2104 | if (list_empty(&mddev->disks)) | |
2105 | return 0; /* nothing to do */ | |
629acb6a JB |
2106 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2107 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2108 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2109 | /* skip spares and non-functional disks */ |
2110 | if (test_bit(Faulty, &rdev->flags)) | |
2111 | continue; | |
2112 | if (rdev->raid_disk < 0) | |
2113 | continue; | |
ac5e7113 AN |
2114 | if (!reference) { |
2115 | /* Use the first rdev as the reference */ | |
2116 | reference = rdev; | |
2117 | continue; | |
2118 | } | |
2119 | /* does this rdev's profile match the reference profile? */ | |
2120 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2121 | rdev->bdev->bd_disk) < 0) | |
2122 | return -EINVAL; | |
2123 | } | |
89078d57 MP |
2124 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2125 | return 0; | |
ac5e7113 AN |
2126 | /* |
2127 | * All component devices are integrity capable and have matching | |
2128 | * profiles, register the common profile for the md device. | |
2129 | */ | |
25520d55 MP |
2130 | blk_integrity_register(mddev->gendisk, |
2131 | bdev_get_integrity(reference->bdev)); | |
2132 | ||
9d48739e | 2133 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2134 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2135 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2136 | mdname(mddev)); |
2137 | return -EINVAL; | |
2138 | } | |
ac5e7113 AN |
2139 | return 0; |
2140 | } | |
2141 | EXPORT_SYMBOL(md_integrity_register); | |
2142 | ||
1501efad DW |
2143 | /* |
2144 | * Attempt to add an rdev, but only if it is consistent with the current | |
2145 | * integrity profile | |
2146 | */ | |
2147 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2148 | { |
2863b9eb JB |
2149 | struct blk_integrity *bi_rdev; |
2150 | struct blk_integrity *bi_mddev; | |
1501efad | 2151 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2152 | |
2153 | if (!mddev->gendisk) | |
1501efad | 2154 | return 0; |
2863b9eb JB |
2155 | |
2156 | bi_rdev = bdev_get_integrity(rdev->bdev); | |
2157 | bi_mddev = blk_get_integrity(mddev->gendisk); | |
3f9d99c1 | 2158 | |
ac5e7113 | 2159 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2160 | return 0; |
2161 | ||
2162 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2163 | pr_err("%s: incompatible integrity profile for %s\n", |
2164 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2165 | return -ENXIO; |
2166 | } | |
2167 | ||
2168 | return 0; | |
3f9d99c1 | 2169 | } |
ac5e7113 | 2170 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2171 | |
f72ffdd6 | 2172 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2173 | { |
7dd5e7c3 | 2174 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2175 | struct kobject *ko; |
5e55e2f5 | 2176 | int err; |
1da177e4 | 2177 | |
11e2ede0 DW |
2178 | /* prevent duplicates */ |
2179 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2180 | return -EEXIST; | |
2181 | ||
97b20ef7 N |
2182 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2183 | mddev->pers) | |
2184 | return -EROFS; | |
2185 | ||
dd8ac336 | 2186 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2187 | if (!test_bit(Journal, &rdev->flags) && |
2188 | rdev->sectors && | |
2189 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2190 | if (mddev->pers) { |
2191 | /* Cannot change size, so fail | |
2192 | * If mddev->level <= 0, then we don't care | |
2193 | * about aligning sizes (e.g. linear) | |
2194 | */ | |
2195 | if (mddev->level > 0) | |
2196 | return -ENOSPC; | |
2197 | } else | |
dd8ac336 | 2198 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2199 | } |
1da177e4 LT |
2200 | |
2201 | /* Verify rdev->desc_nr is unique. | |
2202 | * If it is -1, assign a free number, else | |
2203 | * check number is not in use | |
2204 | */ | |
4878e9eb | 2205 | rcu_read_lock(); |
1da177e4 LT |
2206 | if (rdev->desc_nr < 0) { |
2207 | int choice = 0; | |
4878e9eb N |
2208 | if (mddev->pers) |
2209 | choice = mddev->raid_disks; | |
57d051dc | 2210 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2211 | choice++; |
2212 | rdev->desc_nr = choice; | |
2213 | } else { | |
57d051dc | 2214 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2215 | rcu_read_unlock(); |
1da177e4 | 2216 | return -EBUSY; |
4878e9eb | 2217 | } |
1da177e4 | 2218 | } |
4878e9eb | 2219 | rcu_read_unlock(); |
f6b6ec5c SL |
2220 | if (!test_bit(Journal, &rdev->flags) && |
2221 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2222 | pr_warn("md: %s: array is limited to %d devices\n", |
2223 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2224 | return -EBUSY; |
2225 | } | |
19133a42 | 2226 | bdevname(rdev->bdev,b); |
90a9befb | 2227 | strreplace(b, '/', '!'); |
649316b2 | 2228 | |
1da177e4 | 2229 | rdev->mddev = mddev; |
9d48739e | 2230 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2231 | |
b2d6db58 | 2232 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2233 | goto fail; |
86e6ffdd | 2234 | |
0762b8bd | 2235 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2236 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2237 | /* failure here is OK */; | |
2238 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2239 | |
4b80991c | 2240 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2241 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2242 | |
2243 | /* May as well allow recovery to be retried once */ | |
5389042f | 2244 | mddev->recovery_disabled++; |
3f9d99c1 | 2245 | |
1da177e4 | 2246 | return 0; |
5e55e2f5 N |
2247 | |
2248 | fail: | |
9d48739e N |
2249 | pr_warn("md: failed to register dev-%s for %s\n", |
2250 | b, mdname(mddev)); | |
5e55e2f5 | 2251 | return err; |
1da177e4 LT |
2252 | } |
2253 | ||
177a99b2 | 2254 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2255 | { |
3cb03002 | 2256 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2257 | kobject_del(&rdev->kobj); |
177a99b2 | 2258 | kobject_put(&rdev->kobj); |
5792a285 N |
2259 | } |
2260 | ||
f72ffdd6 | 2261 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2262 | { |
2263 | char b[BDEVNAME_SIZE]; | |
403df478 | 2264 | |
49731baa | 2265 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2266 | list_del_rcu(&rdev->same_set); |
9d48739e | 2267 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
1da177e4 | 2268 | rdev->mddev = NULL; |
86e6ffdd | 2269 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2270 | sysfs_put(rdev->sysfs_state); |
2271 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2272 | rdev->badblocks.count = 0; |
5792a285 | 2273 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2274 | * writing to 'remove' to "dev/state". We also need |
2275 | * to delay it due to rcu usage. | |
5792a285 | 2276 | */ |
4b80991c | 2277 | synchronize_rcu(); |
177a99b2 N |
2278 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2279 | kobject_get(&rdev->kobj); | |
e804ac78 | 2280 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2281 | } |
2282 | ||
2283 | /* | |
2284 | * prevent the device from being mounted, repartitioned or | |
2285 | * otherwise reused by a RAID array (or any other kernel | |
2286 | * subsystem), by bd_claiming the device. | |
2287 | */ | |
3cb03002 | 2288 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2289 | { |
2290 | int err = 0; | |
2291 | struct block_device *bdev; | |
2292 | char b[BDEVNAME_SIZE]; | |
2293 | ||
d4d77629 | 2294 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2295 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2296 | if (IS_ERR(bdev)) { |
9d48739e | 2297 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2298 | return PTR_ERR(bdev); |
2299 | } | |
1da177e4 LT |
2300 | rdev->bdev = bdev; |
2301 | return err; | |
2302 | } | |
2303 | ||
3cb03002 | 2304 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2305 | { |
2306 | struct block_device *bdev = rdev->bdev; | |
2307 | rdev->bdev = NULL; | |
e525fd89 | 2308 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2309 | } |
2310 | ||
2311 | void md_autodetect_dev(dev_t dev); | |
2312 | ||
f72ffdd6 | 2313 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2314 | { |
2315 | char b[BDEVNAME_SIZE]; | |
403df478 | 2316 | |
9d48739e | 2317 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2318 | md_rdev_clear(rdev); |
1da177e4 | 2319 | #ifndef MODULE |
d0fae18f N |
2320 | if (test_bit(AutoDetected, &rdev->flags)) |
2321 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2322 | #endif |
2323 | unlock_rdev(rdev); | |
86e6ffdd | 2324 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2325 | } |
2326 | ||
fb56dfef | 2327 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2328 | { |
2329 | unbind_rdev_from_array(rdev); | |
2330 | export_rdev(rdev); | |
2331 | } | |
fb56dfef | 2332 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2333 | |
fd01b88c | 2334 | static void export_array(struct mddev *mddev) |
1da177e4 | 2335 | { |
0638bb0e | 2336 | struct md_rdev *rdev; |
1da177e4 | 2337 | |
0638bb0e N |
2338 | while (!list_empty(&mddev->disks)) { |
2339 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2340 | same_set); | |
fb56dfef | 2341 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2342 | } |
1da177e4 LT |
2343 | mddev->raid_disks = 0; |
2344 | mddev->major_version = 0; | |
2345 | } | |
2346 | ||
6497709b N |
2347 | static bool set_in_sync(struct mddev *mddev) |
2348 | { | |
efa4b77b | 2349 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2350 | if (!mddev->in_sync) { |
2351 | mddev->sync_checkers++; | |
2352 | spin_unlock(&mddev->lock); | |
2353 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2354 | spin_lock(&mddev->lock); | |
2355 | if (!mddev->in_sync && | |
2356 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2357 | mddev->in_sync = 1; |
4ad23a97 N |
2358 | /* |
2359 | * Ensure ->in_sync is visible before we clear | |
2360 | * ->sync_checkers. | |
2361 | */ | |
55cc39f3 | 2362 | smp_mb(); |
6497709b N |
2363 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2364 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2365 | } | |
4ad23a97 N |
2366 | if (--mddev->sync_checkers == 0) |
2367 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2368 | } |
2369 | if (mddev->safemode == 1) | |
2370 | mddev->safemode = 0; | |
2371 | return mddev->in_sync; | |
2372 | } | |
2373 | ||
f72ffdd6 | 2374 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2375 | { |
42543769 N |
2376 | /* Update each superblock (in-memory image), but |
2377 | * if we are allowed to, skip spares which already | |
2378 | * have the right event counter, or have one earlier | |
2379 | * (which would mean they aren't being marked as dirty | |
2380 | * with the rest of the array) | |
2381 | */ | |
3cb03002 | 2382 | struct md_rdev *rdev; |
dafb20fa | 2383 | rdev_for_each(rdev, mddev) { |
42543769 N |
2384 | if (rdev->sb_events == mddev->events || |
2385 | (nospares && | |
2386 | rdev->raid_disk < 0 && | |
42543769 N |
2387 | rdev->sb_events+1 == mddev->events)) { |
2388 | /* Don't update this superblock */ | |
2389 | rdev->sb_loaded = 2; | |
2390 | } else { | |
076f968b | 2391 | sync_super(mddev, rdev); |
42543769 N |
2392 | rdev->sb_loaded = 1; |
2393 | } | |
1da177e4 LT |
2394 | } |
2395 | } | |
2396 | ||
2aa82191 GR |
2397 | static bool does_sb_need_changing(struct mddev *mddev) |
2398 | { | |
2399 | struct md_rdev *rdev; | |
2400 | struct mdp_superblock_1 *sb; | |
2401 | int role; | |
2402 | ||
2403 | /* Find a good rdev */ | |
2404 | rdev_for_each(rdev, mddev) | |
2405 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2406 | break; | |
2407 | ||
2408 | /* No good device found. */ | |
2409 | if (!rdev) | |
2410 | return false; | |
2411 | ||
2412 | sb = page_address(rdev->sb_page); | |
2413 | /* Check if a device has become faulty or a spare become active */ | |
2414 | rdev_for_each(rdev, mddev) { | |
2415 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2416 | /* Device activated? */ | |
2417 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2418 | !test_bit(Faulty, &rdev->flags)) | |
2419 | return true; | |
2420 | /* Device turned faulty? */ | |
2421 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2422 | return true; | |
2423 | } | |
2424 | ||
2425 | /* Check if any mddev parameters have changed */ | |
2426 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2427 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2428 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2429 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2430 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2431 | return true; | |
2432 | ||
2433 | return false; | |
2434 | } | |
2435 | ||
1aee41f6 | 2436 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2437 | { |
3cb03002 | 2438 | struct md_rdev *rdev; |
06d91a5f | 2439 | int sync_req; |
42543769 | 2440 | int nospares = 0; |
2699b672 | 2441 | int any_badblocks_changed = 0; |
23b63f9f | 2442 | int ret = -1; |
1da177e4 | 2443 | |
d87f064f N |
2444 | if (mddev->ro) { |
2445 | if (force_change) | |
2953079c | 2446 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2447 | return; |
2448 | } | |
2aa82191 | 2449 | |
2c97cf13 | 2450 | repeat: |
2aa82191 | 2451 | if (mddev_is_clustered(mddev)) { |
2953079c | 2452 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2453 | force_change = 1; |
2953079c | 2454 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2455 | nospares = 1; |
23b63f9f | 2456 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2457 | /* Has someone else has updated the sb */ |
2458 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2459 | if (ret == 0) |
2460 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2461 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2462 | BIT(MD_SB_CHANGE_DEVS) | | |
2463 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2464 | return; |
2465 | } | |
2466 | } | |
2c97cf13 | 2467 | |
db0505d3 N |
2468 | /* |
2469 | * First make sure individual recovery_offsets are correct | |
2470 | * curr_resync_completed can only be used during recovery. | |
2471 | * During reshape/resync it might use array-addresses rather | |
2472 | * that device addresses. | |
2473 | */ | |
dafb20fa | 2474 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2475 | if (rdev->raid_disk >= 0 && |
2476 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2477 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2478 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2479 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2480 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2481 | !test_bit(In_sync, &rdev->flags) && |
2482 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2483 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2484 | ||
f72ffdd6 | 2485 | } |
bd52b746 | 2486 | if (!mddev->persistent) { |
2953079c SL |
2487 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2488 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2489 | if (!mddev->external) { |
2953079c | 2490 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2491 | rdev_for_each(rdev, mddev) { |
de393cde | 2492 | if (rdev->badblocks.changed) { |
d0962936 | 2493 | rdev->badblocks.changed = 0; |
fc974ee2 | 2494 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2495 | md_error(mddev, rdev); |
2496 | } | |
2497 | clear_bit(Blocked, &rdev->flags); | |
2498 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2499 | wake_up(&rdev->blocked_wait); | |
2500 | } | |
2501 | } | |
3a3a5ddb N |
2502 | wake_up(&mddev->sb_wait); |
2503 | return; | |
2504 | } | |
2505 | ||
85572d7c | 2506 | spin_lock(&mddev->lock); |
84692195 | 2507 | |
9ebc6ef1 | 2508 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2509 | |
2953079c | 2510 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2511 | force_change = 1; |
2953079c | 2512 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2513 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2514 | * though if events isn't the right even/odd, we will have to do | |
2515 | * spares after all | |
2516 | */ | |
2517 | nospares = 1; | |
2518 | if (force_change) | |
2519 | nospares = 0; | |
2520 | if (mddev->degraded) | |
84692195 N |
2521 | /* If the array is degraded, then skipping spares is both |
2522 | * dangerous and fairly pointless. | |
2523 | * Dangerous because a device that was removed from the array | |
2524 | * might have a event_count that still looks up-to-date, | |
2525 | * so it can be re-added without a resync. | |
2526 | * Pointless because if there are any spares to skip, | |
2527 | * then a recovery will happen and soon that array won't | |
2528 | * be degraded any more and the spare can go back to sleep then. | |
2529 | */ | |
850b2b42 | 2530 | nospares = 0; |
84692195 | 2531 | |
06d91a5f | 2532 | sync_req = mddev->in_sync; |
42543769 N |
2533 | |
2534 | /* If this is just a dirty<->clean transition, and the array is clean | |
2535 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2536 | if (nospares |
42543769 | 2537 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2538 | && mddev->can_decrease_events |
2539 | && mddev->events != 1) { | |
42543769 | 2540 | mddev->events--; |
a8707c08 N |
2541 | mddev->can_decrease_events = 0; |
2542 | } else { | |
42543769 N |
2543 | /* otherwise we have to go forward and ... */ |
2544 | mddev->events ++; | |
a8707c08 | 2545 | mddev->can_decrease_events = nospares; |
42543769 | 2546 | } |
1da177e4 | 2547 | |
403df478 N |
2548 | /* |
2549 | * This 64-bit counter should never wrap. | |
2550 | * Either we are in around ~1 trillion A.C., assuming | |
2551 | * 1 reboot per second, or we have a bug... | |
2552 | */ | |
2553 | WARN_ON(mddev->events == 0); | |
2699b672 | 2554 | |
dafb20fa | 2555 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2556 | if (rdev->badblocks.changed) |
2557 | any_badblocks_changed++; | |
de393cde N |
2558 | if (test_bit(Faulty, &rdev->flags)) |
2559 | set_bit(FaultRecorded, &rdev->flags); | |
2560 | } | |
2699b672 | 2561 | |
e691063a | 2562 | sync_sbs(mddev, nospares); |
85572d7c | 2563 | spin_unlock(&mddev->lock); |
1da177e4 | 2564 | |
36a4e1fe N |
2565 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2566 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2567 | |
504634f6 SL |
2568 | if (mddev->queue) |
2569 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2570 | rewrite: |
e64e4018 | 2571 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2572 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2573 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2574 | |
42543769 N |
2575 | if (rdev->sb_loaded != 1) |
2576 | continue; /* no noise on spare devices */ | |
1da177e4 | 2577 | |
f466722c | 2578 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2579 | md_super_write(mddev,rdev, |
0f420358 | 2580 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2581 | rdev->sb_page); |
36a4e1fe N |
2582 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2583 | bdevname(rdev->bdev, b), | |
2584 | (unsigned long long)rdev->sb_start); | |
42543769 | 2585 | rdev->sb_events = mddev->events; |
2699b672 N |
2586 | if (rdev->badblocks.size) { |
2587 | md_super_write(mddev, rdev, | |
2588 | rdev->badblocks.sector, | |
2589 | rdev->badblocks.size << 9, | |
2590 | rdev->bb_page); | |
2591 | rdev->badblocks.size = 0; | |
2592 | } | |
7bfa19f2 | 2593 | |
f466722c | 2594 | } else |
36a4e1fe N |
2595 | pr_debug("md: %s (skipping faulty)\n", |
2596 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2597 | |
7bfa19f2 | 2598 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2599 | /* only need to write one superblock... */ |
2600 | break; | |
2601 | } | |
46533ff7 N |
2602 | if (md_super_wait(mddev) < 0) |
2603 | goto rewrite; | |
2953079c | 2604 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2605 | |
2c97cf13 GJ |
2606 | if (mddev_is_clustered(mddev) && ret == 0) |
2607 | md_cluster_ops->metadata_update_finish(mddev); | |
2608 | ||
850b2b42 | 2609 | if (mddev->in_sync != sync_req || |
2953079c SL |
2610 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2611 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2612 | /* have to write it out again */ |
06d91a5f | 2613 | goto repeat; |
3d310eb7 | 2614 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2615 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2616 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2617 | |
dafb20fa | 2618 | rdev_for_each(rdev, mddev) { |
de393cde N |
2619 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2620 | clear_bit(Blocked, &rdev->flags); | |
2621 | ||
2622 | if (any_badblocks_changed) | |
fc974ee2 | 2623 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2624 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2625 | wake_up(&rdev->blocked_wait); | |
2626 | } | |
1da177e4 | 2627 | } |
1aee41f6 | 2628 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2629 | |
a6da4ef8 GR |
2630 | static int add_bound_rdev(struct md_rdev *rdev) |
2631 | { | |
2632 | struct mddev *mddev = rdev->mddev; | |
2633 | int err = 0; | |
87d4d916 | 2634 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2635 | |
87d4d916 | 2636 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2637 | /* If there is hot_add_disk but no hot_remove_disk |
2638 | * then added disks for geometry changes, | |
2639 | * and should be added immediately. | |
2640 | */ | |
2641 | super_types[mddev->major_version]. | |
2642 | validate_super(mddev, rdev); | |
87d4d916 SL |
2643 | if (add_journal) |
2644 | mddev_suspend(mddev); | |
a6da4ef8 | 2645 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2646 | if (add_journal) |
2647 | mddev_resume(mddev); | |
a6da4ef8 | 2648 | if (err) { |
db767672 | 2649 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2650 | return err; |
2651 | } | |
2652 | } | |
2653 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2654 | ||
2953079c | 2655 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2656 | if (mddev->degraded) |
2657 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2658 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2659 | md_new_event(mddev); | |
2660 | md_wakeup_thread(mddev->thread); | |
2661 | return 0; | |
2662 | } | |
1da177e4 | 2663 | |
7f6ce769 | 2664 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2665 | * We want to accept with case. For this we use cmd_match. |
2666 | */ | |
2667 | static int cmd_match(const char *cmd, const char *str) | |
2668 | { | |
2669 | /* See if cmd, written into a sysfs file, matches | |
2670 | * str. They must either be the same, or cmd can | |
2671 | * have a trailing newline | |
2672 | */ | |
2673 | while (*cmd && *str && *cmd == *str) { | |
2674 | cmd++; | |
2675 | str++; | |
2676 | } | |
2677 | if (*cmd == '\n') | |
2678 | cmd++; | |
2679 | if (*str || *cmd) | |
2680 | return 0; | |
2681 | return 1; | |
2682 | } | |
2683 | ||
86e6ffdd N |
2684 | struct rdev_sysfs_entry { |
2685 | struct attribute attr; | |
3cb03002 N |
2686 | ssize_t (*show)(struct md_rdev *, char *); |
2687 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2688 | }; |
2689 | ||
2690 | static ssize_t | |
3cb03002 | 2691 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2692 | { |
35b785f7 | 2693 | char *sep = ","; |
20a49ff6 | 2694 | size_t len = 0; |
6aa7de05 | 2695 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2696 | |
758bfc8a | 2697 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2698 | (!test_bit(ExternalBbl, &flags) && |
2699 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2700 | len += sprintf(page+len, "faulty%s", sep); |
2701 | if (test_bit(In_sync, &flags)) | |
2702 | len += sprintf(page+len, "in_sync%s", sep); | |
2703 | if (test_bit(Journal, &flags)) | |
2704 | len += sprintf(page+len, "journal%s", sep); | |
2705 | if (test_bit(WriteMostly, &flags)) | |
2706 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2707 | if (test_bit(Blocked, &flags) || |
52c64152 | 2708 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2709 | && !test_bit(Faulty, &flags))) |
2710 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2711 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2712 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2713 | !test_bit(In_sync, &flags)) |
2714 | len += sprintf(page+len, "spare%s", sep); | |
2715 | if (test_bit(WriteErrorSeen, &flags)) | |
2716 | len += sprintf(page+len, "write_error%s", sep); | |
2717 | if (test_bit(WantReplacement, &flags)) | |
2718 | len += sprintf(page+len, "want_replacement%s", sep); | |
2719 | if (test_bit(Replacement, &flags)) | |
2720 | len += sprintf(page+len, "replacement%s", sep); | |
2721 | if (test_bit(ExternalBbl, &flags)) | |
2722 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2723 | if (test_bit(FailFast, &flags)) |
2724 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2725 | |
2726 | if (len) | |
2727 | len -= strlen(sep); | |
2d78f8c4 | 2728 | |
86e6ffdd N |
2729 | return len+sprintf(page+len, "\n"); |
2730 | } | |
2731 | ||
45dc2de1 | 2732 | static ssize_t |
3cb03002 | 2733 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2734 | { |
2735 | /* can write | |
de393cde | 2736 | * faulty - simulates an error |
45dc2de1 | 2737 | * remove - disconnects the device |
f655675b N |
2738 | * writemostly - sets write_mostly |
2739 | * -writemostly - clears write_mostly | |
de393cde N |
2740 | * blocked - sets the Blocked flags |
2741 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2742 | * insync - sets Insync providing device isn't active |
f466722c N |
2743 | * -insync - clear Insync for a device with a slot assigned, |
2744 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2745 | * write_error - sets WriteErrorSeen |
2746 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2747 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2748 | */ |
2749 | int err = -EINVAL; | |
2750 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2751 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2752 | if (test_bit(Faulty, &rdev->flags)) |
2753 | err = 0; | |
2754 | else | |
2755 | err = -EBUSY; | |
45dc2de1 | 2756 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2757 | if (rdev->mddev->pers) { |
2758 | clear_bit(Blocked, &rdev->flags); | |
2759 | remove_and_add_spares(rdev->mddev, rdev); | |
2760 | } | |
45dc2de1 N |
2761 | if (rdev->raid_disk >= 0) |
2762 | err = -EBUSY; | |
2763 | else { | |
fd01b88c | 2764 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2765 | err = 0; |
a9720903 GJ |
2766 | if (mddev_is_clustered(mddev)) |
2767 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2768 | ||
2769 | if (err == 0) { | |
2770 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2771 | if (mddev->pers) { |
2953079c | 2772 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2773 | md_wakeup_thread(mddev->thread); |
2774 | } | |
a9720903 GJ |
2775 | md_new_event(mddev); |
2776 | } | |
45dc2de1 | 2777 | } |
f655675b N |
2778 | } else if (cmd_match(buf, "writemostly")) { |
2779 | set_bit(WriteMostly, &rdev->flags); | |
2780 | err = 0; | |
2781 | } else if (cmd_match(buf, "-writemostly")) { | |
2782 | clear_bit(WriteMostly, &rdev->flags); | |
6bfe0b49 DW |
2783 | err = 0; |
2784 | } else if (cmd_match(buf, "blocked")) { | |
2785 | set_bit(Blocked, &rdev->flags); | |
2786 | err = 0; | |
2787 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2788 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2789 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2790 | rdev->badblocks.unacked_exist) { |
de393cde N |
2791 | /* metadata handler doesn't understand badblocks, |
2792 | * so we need to fail the device | |
2793 | */ | |
2794 | md_error(rdev->mddev, rdev); | |
2795 | } | |
6bfe0b49 | 2796 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2797 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2798 | wake_up(&rdev->blocked_wait); |
2799 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2800 | md_wakeup_thread(rdev->mddev->thread); | |
2801 | ||
6d56e278 N |
2802 | err = 0; |
2803 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2804 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2805 | err = 0; |
688834e6 N |
2806 | } else if (cmd_match(buf, "failfast")) { |
2807 | set_bit(FailFast, &rdev->flags); | |
2808 | err = 0; | |
2809 | } else if (cmd_match(buf, "-failfast")) { | |
2810 | clear_bit(FailFast, &rdev->flags); | |
2811 | err = 0; | |
f2076e7d SL |
2812 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2813 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2814 | if (rdev->mddev->pers == NULL) { |
2815 | clear_bit(In_sync, &rdev->flags); | |
2816 | rdev->saved_raid_disk = rdev->raid_disk; | |
2817 | rdev->raid_disk = -1; | |
2818 | err = 0; | |
2819 | } | |
d7a9d443 N |
2820 | } else if (cmd_match(buf, "write_error")) { |
2821 | set_bit(WriteErrorSeen, &rdev->flags); | |
2822 | err = 0; | |
2823 | } else if (cmd_match(buf, "-write_error")) { | |
2824 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2825 | err = 0; | |
2d78f8c4 N |
2826 | } else if (cmd_match(buf, "want_replacement")) { |
2827 | /* Any non-spare device that is not a replacement can | |
2828 | * become want_replacement at any time, but we then need to | |
2829 | * check if recovery is needed. | |
2830 | */ | |
2831 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2832 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2833 | !test_bit(Replacement, &rdev->flags)) |
2834 | set_bit(WantReplacement, &rdev->flags); | |
2835 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2836 | md_wakeup_thread(rdev->mddev->thread); | |
2837 | err = 0; | |
2838 | } else if (cmd_match(buf, "-want_replacement")) { | |
2839 | /* Clearing 'want_replacement' is always allowed. | |
2840 | * Once replacements starts it is too late though. | |
2841 | */ | |
2842 | err = 0; | |
2843 | clear_bit(WantReplacement, &rdev->flags); | |
2844 | } else if (cmd_match(buf, "replacement")) { | |
2845 | /* Can only set a device as a replacement when array has not | |
2846 | * yet been started. Once running, replacement is automatic | |
2847 | * from spares, or by assigning 'slot'. | |
2848 | */ | |
2849 | if (rdev->mddev->pers) | |
2850 | err = -EBUSY; | |
2851 | else { | |
2852 | set_bit(Replacement, &rdev->flags); | |
2853 | err = 0; | |
2854 | } | |
2855 | } else if (cmd_match(buf, "-replacement")) { | |
2856 | /* Similarly, can only clear Replacement before start */ | |
2857 | if (rdev->mddev->pers) | |
2858 | err = -EBUSY; | |
2859 | else { | |
2860 | clear_bit(Replacement, &rdev->flags); | |
2861 | err = 0; | |
2862 | } | |
a6da4ef8 | 2863 | } else if (cmd_match(buf, "re-add")) { |
011abdc9 N |
2864 | if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && |
2865 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
2866 | /* clear_bit is performed _after_ all the devices |
2867 | * have their local Faulty bit cleared. If any writes | |
2868 | * happen in the meantime in the local node, they | |
2869 | * will land in the local bitmap, which will be synced | |
2870 | * by this node eventually | |
2871 | */ | |
2872 | if (!mddev_is_clustered(rdev->mddev) || | |
2873 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2874 | clear_bit(Faulty, &rdev->flags); | |
2875 | err = add_bound_rdev(rdev); | |
2876 | } | |
a6da4ef8 GR |
2877 | } else |
2878 | err = -EBUSY; | |
35b785f7 TM |
2879 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2880 | set_bit(ExternalBbl, &rdev->flags); | |
2881 | rdev->badblocks.shift = 0; | |
2882 | err = 0; | |
2883 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
2884 | clear_bit(ExternalBbl, &rdev->flags); | |
2885 | err = 0; | |
45dc2de1 | 2886 | } |
00bcb4ac N |
2887 | if (!err) |
2888 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2889 | return err ? err : len; |
2890 | } | |
80ca3a44 | 2891 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2892 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2893 | |
4dbcdc75 | 2894 | static ssize_t |
3cb03002 | 2895 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2896 | { |
2897 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2898 | } | |
2899 | ||
2900 | static ssize_t | |
3cb03002 | 2901 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2902 | { |
4c9309c0 AD |
2903 | unsigned int n; |
2904 | int rv; | |
2905 | ||
2906 | rv = kstrtouint(buf, 10, &n); | |
2907 | if (rv < 0) | |
2908 | return rv; | |
2909 | atomic_set(&rdev->corrected_errors, n); | |
2910 | return len; | |
4dbcdc75 N |
2911 | } |
2912 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 2913 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 2914 | |
014236d2 | 2915 | static ssize_t |
3cb03002 | 2916 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 2917 | { |
f2076e7d SL |
2918 | if (test_bit(Journal, &rdev->flags)) |
2919 | return sprintf(page, "journal\n"); | |
2920 | else if (rdev->raid_disk < 0) | |
014236d2 N |
2921 | return sprintf(page, "none\n"); |
2922 | else | |
2923 | return sprintf(page, "%d\n", rdev->raid_disk); | |
2924 | } | |
2925 | ||
2926 | static ssize_t | |
3cb03002 | 2927 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 2928 | { |
4c9309c0 | 2929 | int slot; |
c303da6d | 2930 | int err; |
4c9309c0 | 2931 | |
f2076e7d SL |
2932 | if (test_bit(Journal, &rdev->flags)) |
2933 | return -EBUSY; | |
014236d2 N |
2934 | if (strncmp(buf, "none", 4)==0) |
2935 | slot = -1; | |
4c9309c0 AD |
2936 | else { |
2937 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
2938 | if (err < 0) | |
2939 | return err; | |
2940 | } | |
6c2fce2e | 2941 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
2942 | /* Setting 'slot' on an active array requires also |
2943 | * updating the 'rd%d' link, and communicating | |
2944 | * with the personality with ->hot_*_disk. | |
2945 | * For now we only support removing | |
2946 | * failed/spare devices. This normally happens automatically, | |
2947 | * but not when the metadata is externally managed. | |
2948 | */ | |
c303da6d N |
2949 | if (rdev->raid_disk == -1) |
2950 | return -EEXIST; | |
2951 | /* personality does all needed checks */ | |
01393f3d | 2952 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 2953 | return -EINVAL; |
746d3207 N |
2954 | clear_bit(Blocked, &rdev->flags); |
2955 | remove_and_add_spares(rdev->mddev, rdev); | |
2956 | if (rdev->raid_disk >= 0) | |
2957 | return -EBUSY; | |
c303da6d N |
2958 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
2959 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 2960 | } else if (rdev->mddev->pers) { |
6c2fce2e | 2961 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 2962 | * if we ever get bitmaps working here. |
6c2fce2e | 2963 | */ |
cb01c549 | 2964 | int err; |
6c2fce2e NB |
2965 | |
2966 | if (rdev->raid_disk != -1) | |
2967 | return -EBUSY; | |
2968 | ||
c6751b2b N |
2969 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
2970 | return -EBUSY; | |
2971 | ||
6c2fce2e NB |
2972 | if (rdev->mddev->pers->hot_add_disk == NULL) |
2973 | return -EINVAL; | |
2974 | ||
ba1b41b6 N |
2975 | if (slot >= rdev->mddev->raid_disks && |
2976 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
2977 | return -ENOSPC; | |
2978 | ||
6c2fce2e NB |
2979 | rdev->raid_disk = slot; |
2980 | if (test_bit(In_sync, &rdev->flags)) | |
2981 | rdev->saved_raid_disk = slot; | |
2982 | else | |
2983 | rdev->saved_raid_disk = -1; | |
d30519fc | 2984 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 2985 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
2986 | err = rdev->mddev->pers-> |
2987 | hot_add_disk(rdev->mddev, rdev); | |
2988 | if (err) { | |
2989 | rdev->raid_disk = -1; | |
2990 | return err; | |
2991 | } else | |
2992 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2993 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
2994 | /* failure here is OK */; | |
6c2fce2e | 2995 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 2996 | } else { |
ba1b41b6 N |
2997 | if (slot >= rdev->mddev->raid_disks && |
2998 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
2999 | return -ENOSPC; |
3000 | rdev->raid_disk = slot; | |
3001 | /* assume it is working */ | |
c5d79adb N |
3002 | clear_bit(Faulty, &rdev->flags); |
3003 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3004 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3005 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3006 | } |
014236d2 N |
3007 | return len; |
3008 | } | |
3009 | ||
014236d2 | 3010 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3011 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3012 | |
93c8cad0 | 3013 | static ssize_t |
3cb03002 | 3014 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3015 | { |
6961ece4 | 3016 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3017 | } |
3018 | ||
3019 | static ssize_t | |
3cb03002 | 3020 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3021 | { |
c6563a8c | 3022 | unsigned long long offset; |
b29bebd6 | 3023 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3024 | return -EINVAL; |
8ed0a521 | 3025 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3026 | return -EBUSY; |
dd8ac336 | 3027 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3028 | /* Must set offset before size, so overlap checks |
3029 | * can be sane */ | |
3030 | return -EBUSY; | |
93c8cad0 | 3031 | rdev->data_offset = offset; |
25f7fd47 | 3032 | rdev->new_data_offset = offset; |
93c8cad0 N |
3033 | return len; |
3034 | } | |
3035 | ||
3036 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3037 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3038 | |
c6563a8c N |
3039 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3040 | { | |
3041 | return sprintf(page, "%llu\n", | |
3042 | (unsigned long long)rdev->new_data_offset); | |
3043 | } | |
3044 | ||
3045 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3046 | const char *buf, size_t len) | |
3047 | { | |
3048 | unsigned long long new_offset; | |
3049 | struct mddev *mddev = rdev->mddev; | |
3050 | ||
b29bebd6 | 3051 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3052 | return -EINVAL; |
3053 | ||
f851b60d N |
3054 | if (mddev->sync_thread || |
3055 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3056 | return -EBUSY; |
3057 | if (new_offset == rdev->data_offset) | |
3058 | /* reset is always permitted */ | |
3059 | ; | |
3060 | else if (new_offset > rdev->data_offset) { | |
3061 | /* must not push array size beyond rdev_sectors */ | |
3062 | if (new_offset - rdev->data_offset | |
3063 | + mddev->dev_sectors > rdev->sectors) | |
3064 | return -E2BIG; | |
3065 | } | |
3066 | /* Metadata worries about other space details. */ | |
3067 | ||
3068 | /* decreasing the offset is inconsistent with a backwards | |
3069 | * reshape. | |
3070 | */ | |
3071 | if (new_offset < rdev->data_offset && | |
3072 | mddev->reshape_backwards) | |
3073 | return -EINVAL; | |
3074 | /* Increasing offset is inconsistent with forwards | |
3075 | * reshape. reshape_direction should be set to | |
3076 | * 'backwards' first. | |
3077 | */ | |
3078 | if (new_offset > rdev->data_offset && | |
3079 | !mddev->reshape_backwards) | |
3080 | return -EINVAL; | |
3081 | ||
3082 | if (mddev->pers && mddev->persistent && | |
3083 | !super_types[mddev->major_version] | |
3084 | .allow_new_offset(rdev, new_offset)) | |
3085 | return -E2BIG; | |
3086 | rdev->new_data_offset = new_offset; | |
3087 | if (new_offset > rdev->data_offset) | |
3088 | mddev->reshape_backwards = 1; | |
3089 | else if (new_offset < rdev->data_offset) | |
3090 | mddev->reshape_backwards = 0; | |
3091 | ||
3092 | return len; | |
3093 | } | |
3094 | static struct rdev_sysfs_entry rdev_new_offset = | |
3095 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3096 | ||
83303b61 | 3097 | static ssize_t |
3cb03002 | 3098 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3099 | { |
dd8ac336 | 3100 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3101 | } |
3102 | ||
c5d79adb N |
3103 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3104 | { | |
3105 | /* check if two start/length pairs overlap */ | |
3106 | if (s1+l1 <= s2) | |
3107 | return 0; | |
3108 | if (s2+l2 <= s1) | |
3109 | return 0; | |
3110 | return 1; | |
3111 | } | |
3112 | ||
b522adcd DW |
3113 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3114 | { | |
3115 | unsigned long long blocks; | |
3116 | sector_t new; | |
3117 | ||
b29bebd6 | 3118 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3119 | return -EINVAL; |
3120 | ||
3121 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3122 | return -EINVAL; /* sector conversion overflow */ | |
3123 | ||
3124 | new = blocks * 2; | |
3125 | if (new != blocks * 2) | |
3126 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3127 | ||
3128 | *sectors = new; | |
3129 | return 0; | |
3130 | } | |
3131 | ||
83303b61 | 3132 | static ssize_t |
3cb03002 | 3133 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3134 | { |
fd01b88c | 3135 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3136 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3137 | sector_t sectors; |
27c529bb | 3138 | |
f2076e7d SL |
3139 | if (test_bit(Journal, &rdev->flags)) |
3140 | return -EBUSY; | |
b522adcd | 3141 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3142 | return -EINVAL; |
c6563a8c N |
3143 | if (rdev->data_offset != rdev->new_data_offset) |
3144 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3145 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3146 | if (my_mddev->persistent) { |
dd8ac336 AN |
3147 | sectors = super_types[my_mddev->major_version]. |
3148 | rdev_size_change(rdev, sectors); | |
3149 | if (!sectors) | |
0cd17fec | 3150 | return -EBUSY; |
dd8ac336 | 3151 | } else if (!sectors) |
77304d2a | 3152 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3153 | rdev->data_offset; |
a6468539 N |
3154 | if (!my_mddev->pers->resize) |
3155 | /* Cannot change size for RAID0 or Linear etc */ | |
3156 | return -EINVAL; | |
0cd17fec | 3157 | } |
dd8ac336 | 3158 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3159 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3160 | |
dd8ac336 AN |
3161 | rdev->sectors = sectors; |
3162 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3163 | /* Need to check that all other rdevs with the same |
3164 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3165 | * the rdev lists safely. | |
3166 | * This check does not provide a hard guarantee, it | |
3167 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3168 | */ |
fd01b88c | 3169 | struct mddev *mddev; |
c5d79adb | 3170 | int overlap = 0; |
159ec1fc | 3171 | struct list_head *tmp; |
c5d79adb | 3172 | |
8b1afc3d | 3173 | rcu_read_lock(); |
29ac4aa3 | 3174 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3175 | struct md_rdev *rdev2; |
c5d79adb | 3176 | |
dafb20fa | 3177 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3178 | if (rdev->bdev == rdev2->bdev && |
3179 | rdev != rdev2 && | |
3180 | overlaps(rdev->data_offset, rdev->sectors, | |
3181 | rdev2->data_offset, | |
3182 | rdev2->sectors)) { | |
c5d79adb N |
3183 | overlap = 1; |
3184 | break; | |
3185 | } | |
c5d79adb N |
3186 | if (overlap) { |
3187 | mddev_put(mddev); | |
3188 | break; | |
3189 | } | |
3190 | } | |
8b1afc3d | 3191 | rcu_read_unlock(); |
c5d79adb N |
3192 | if (overlap) { |
3193 | /* Someone else could have slipped in a size | |
3194 | * change here, but doing so is just silly. | |
dd8ac336 | 3195 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3196 | * safe, and trust userspace not to race with |
3197 | * itself | |
3198 | */ | |
dd8ac336 | 3199 | rdev->sectors = oldsectors; |
c5d79adb N |
3200 | return -EBUSY; |
3201 | } | |
3202 | } | |
83303b61 N |
3203 | return len; |
3204 | } | |
3205 | ||
3206 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3207 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3208 | |
3cb03002 | 3209 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3210 | { |
3211 | unsigned long long recovery_start = rdev->recovery_offset; | |
3212 | ||
3213 | if (test_bit(In_sync, &rdev->flags) || | |
3214 | recovery_start == MaxSector) | |
3215 | return sprintf(page, "none\n"); | |
3216 | ||
3217 | return sprintf(page, "%llu\n", recovery_start); | |
3218 | } | |
3219 | ||
3cb03002 | 3220 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3221 | { |
3222 | unsigned long long recovery_start; | |
3223 | ||
3224 | if (cmd_match(buf, "none")) | |
3225 | recovery_start = MaxSector; | |
b29bebd6 | 3226 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3227 | return -EINVAL; |
3228 | ||
3229 | if (rdev->mddev->pers && | |
3230 | rdev->raid_disk >= 0) | |
3231 | return -EBUSY; | |
3232 | ||
3233 | rdev->recovery_offset = recovery_start; | |
3234 | if (recovery_start == MaxSector) | |
3235 | set_bit(In_sync, &rdev->flags); | |
3236 | else | |
3237 | clear_bit(In_sync, &rdev->flags); | |
3238 | return len; | |
3239 | } | |
3240 | ||
3241 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3242 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3243 | ||
fc974ee2 VV |
3244 | /* sysfs access to bad-blocks list. |
3245 | * We present two files. | |
3246 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3247 | * are recorded as bad. The list is truncated to fit within | |
3248 | * the one-page limit of sysfs. | |
3249 | * Writing "sector length" to this file adds an acknowledged | |
3250 | * bad block list. | |
3251 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3252 | * been acknowledged. Writing to this file adds bad blocks | |
3253 | * without acknowledging them. This is largely for testing. | |
3254 | */ | |
3cb03002 | 3255 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3256 | { |
3257 | return badblocks_show(&rdev->badblocks, page, 0); | |
3258 | } | |
3cb03002 | 3259 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3260 | { |
de393cde N |
3261 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3262 | /* Maybe that ack was all we needed */ | |
3263 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3264 | wake_up(&rdev->blocked_wait); | |
3265 | return rv; | |
16c791a5 N |
3266 | } |
3267 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3268 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3269 | ||
3cb03002 | 3270 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3271 | { |
3272 | return badblocks_show(&rdev->badblocks, page, 1); | |
3273 | } | |
3cb03002 | 3274 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3275 | { |
3276 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3277 | } | |
3278 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3279 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3280 | ||
664aed04 AP |
3281 | static ssize_t |
3282 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3283 | { | |
3284 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3285 | } | |
3286 | ||
3287 | static ssize_t | |
3288 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3289 | { | |
3290 | unsigned long long sector; | |
3291 | ||
3292 | if (kstrtoull(buf, 10, §or) < 0) | |
3293 | return -EINVAL; | |
3294 | if (sector != (sector_t)sector) | |
3295 | return -EINVAL; | |
3296 | ||
3297 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3298 | rdev->raid_disk >= 0) | |
3299 | return -EBUSY; | |
3300 | ||
3301 | if (rdev->mddev->persistent) { | |
3302 | if (rdev->mddev->major_version == 0) | |
3303 | return -EINVAL; | |
3304 | if ((sector > rdev->sb_start && | |
3305 | sector - rdev->sb_start > S16_MAX) || | |
3306 | (sector < rdev->sb_start && | |
3307 | rdev->sb_start - sector > -S16_MIN)) | |
3308 | return -EINVAL; | |
3309 | rdev->ppl.offset = sector - rdev->sb_start; | |
3310 | } else if (!rdev->mddev->external) { | |
3311 | return -EBUSY; | |
3312 | } | |
3313 | rdev->ppl.sector = sector; | |
3314 | return len; | |
3315 | } | |
3316 | ||
3317 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3318 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3319 | ||
3320 | static ssize_t | |
3321 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3322 | { | |
3323 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3324 | } | |
3325 | ||
3326 | static ssize_t | |
3327 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3328 | { | |
3329 | unsigned int size; | |
3330 | ||
3331 | if (kstrtouint(buf, 10, &size) < 0) | |
3332 | return -EINVAL; | |
3333 | ||
3334 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3335 | rdev->raid_disk >= 0) | |
3336 | return -EBUSY; | |
3337 | ||
3338 | if (rdev->mddev->persistent) { | |
3339 | if (rdev->mddev->major_version == 0) | |
3340 | return -EINVAL; | |
3341 | if (size > U16_MAX) | |
3342 | return -EINVAL; | |
3343 | } else if (!rdev->mddev->external) { | |
3344 | return -EBUSY; | |
3345 | } | |
3346 | rdev->ppl.size = size; | |
3347 | return len; | |
3348 | } | |
3349 | ||
3350 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3351 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3352 | ||
86e6ffdd N |
3353 | static struct attribute *rdev_default_attrs[] = { |
3354 | &rdev_state.attr, | |
4dbcdc75 | 3355 | &rdev_errors.attr, |
014236d2 | 3356 | &rdev_slot.attr, |
93c8cad0 | 3357 | &rdev_offset.attr, |
c6563a8c | 3358 | &rdev_new_offset.attr, |
83303b61 | 3359 | &rdev_size.attr, |
06e3c817 | 3360 | &rdev_recovery_start.attr, |
16c791a5 N |
3361 | &rdev_bad_blocks.attr, |
3362 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3363 | &rdev_ppl_sector.attr, |
3364 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3365 | NULL, |
3366 | }; | |
3367 | static ssize_t | |
3368 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3369 | { | |
3370 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3371 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3372 | |
3373 | if (!entry->show) | |
3374 | return -EIO; | |
758bfc8a N |
3375 | if (!rdev->mddev) |
3376 | return -EBUSY; | |
3377 | return entry->show(rdev, page); | |
86e6ffdd N |
3378 | } |
3379 | ||
3380 | static ssize_t | |
3381 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3382 | const char *page, size_t length) | |
3383 | { | |
3384 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3385 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3386 | ssize_t rv; |
fd01b88c | 3387 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3388 | |
3389 | if (!entry->store) | |
3390 | return -EIO; | |
67463acb N |
3391 | if (!capable(CAP_SYS_ADMIN)) |
3392 | return -EACCES; | |
27c529bb | 3393 | rv = mddev ? mddev_lock(mddev): -EBUSY; |
ca388059 | 3394 | if (!rv) { |
27c529bb N |
3395 | if (rdev->mddev == NULL) |
3396 | rv = -EBUSY; | |
3397 | else | |
3398 | rv = entry->store(rdev, page, length); | |
6a51830e | 3399 | mddev_unlock(mddev); |
ca388059 N |
3400 | } |
3401 | return rv; | |
86e6ffdd N |
3402 | } |
3403 | ||
3404 | static void rdev_free(struct kobject *ko) | |
3405 | { | |
3cb03002 | 3406 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3407 | kfree(rdev); |
3408 | } | |
52cf25d0 | 3409 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3410 | .show = rdev_attr_show, |
3411 | .store = rdev_attr_store, | |
3412 | }; | |
3413 | static struct kobj_type rdev_ktype = { | |
3414 | .release = rdev_free, | |
3415 | .sysfs_ops = &rdev_sysfs_ops, | |
3416 | .default_attrs = rdev_default_attrs, | |
3417 | }; | |
3418 | ||
3cb03002 | 3419 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3420 | { |
3421 | rdev->desc_nr = -1; | |
3422 | rdev->saved_raid_disk = -1; | |
3423 | rdev->raid_disk = -1; | |
3424 | rdev->flags = 0; | |
3425 | rdev->data_offset = 0; | |
c6563a8c | 3426 | rdev->new_data_offset = 0; |
e8bb9a83 | 3427 | rdev->sb_events = 0; |
0e3ef49e | 3428 | rdev->last_read_error = 0; |
2699b672 N |
3429 | rdev->sb_loaded = 0; |
3430 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3431 | atomic_set(&rdev->nr_pending, 0); |
3432 | atomic_set(&rdev->read_errors, 0); | |
3433 | atomic_set(&rdev->corrected_errors, 0); | |
3434 | ||
3435 | INIT_LIST_HEAD(&rdev->same_set); | |
3436 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3437 | |
3438 | /* Add space to store bad block list. | |
3439 | * This reserves the space even on arrays where it cannot | |
3440 | * be used - I wonder if that matters | |
3441 | */ | |
fc974ee2 | 3442 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3443 | } |
3444 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3445 | /* |
3446 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3447 | * | |
3448 | * mark the device faulty if: | |
3449 | * | |
3450 | * - the device is nonexistent (zero size) | |
3451 | * - the device has no valid superblock | |
3452 | * | |
3453 | * a faulty rdev _never_ has rdev->sb set. | |
3454 | */ | |
3cb03002 | 3455 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3456 | { |
3457 | char b[BDEVNAME_SIZE]; | |
3458 | int err; | |
3cb03002 | 3459 | struct md_rdev *rdev; |
1da177e4 LT |
3460 | sector_t size; |
3461 | ||
9ffae0cf | 3462 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3463 | if (!rdev) |
1da177e4 | 3464 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3465 | |
2230dfe4 N |
3466 | err = md_rdev_init(rdev); |
3467 | if (err) | |
3468 | goto abort_free; | |
3469 | err = alloc_disk_sb(rdev); | |
3470 | if (err) | |
1da177e4 LT |
3471 | goto abort_free; |
3472 | ||
c5d79adb | 3473 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3474 | if (err) |
3475 | goto abort_free; | |
3476 | ||
f9cb074b | 3477 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3478 | |
77304d2a | 3479 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3480 | if (!size) { |
9d48739e | 3481 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3482 | bdevname(rdev->bdev,b)); |
3483 | err = -EINVAL; | |
3484 | goto abort_free; | |
3485 | } | |
3486 | ||
3487 | if (super_format >= 0) { | |
3488 | err = super_types[super_format]. | |
3489 | load_super(rdev, NULL, super_minor); | |
3490 | if (err == -EINVAL) { | |
9d48739e | 3491 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3492 | bdevname(rdev->bdev,b), |
9d48739e | 3493 | super_format, super_minor); |
1da177e4 LT |
3494 | goto abort_free; |
3495 | } | |
3496 | if (err < 0) { | |
9d48739e | 3497 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3498 | bdevname(rdev->bdev,b)); |
3499 | goto abort_free; | |
3500 | } | |
3501 | } | |
6bfe0b49 | 3502 | |
1da177e4 LT |
3503 | return rdev; |
3504 | ||
3505 | abort_free: | |
2699b672 N |
3506 | if (rdev->bdev) |
3507 | unlock_rdev(rdev); | |
545c8795 | 3508 | md_rdev_clear(rdev); |
1da177e4 LT |
3509 | kfree(rdev); |
3510 | return ERR_PTR(err); | |
3511 | } | |
3512 | ||
3513 | /* | |
3514 | * Check a full RAID array for plausibility | |
3515 | */ | |
3516 | ||
f72ffdd6 | 3517 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3518 | { |
3519 | int i; | |
3cb03002 | 3520 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3521 | char b[BDEVNAME_SIZE]; |
3522 | ||
3523 | freshest = NULL; | |
dafb20fa | 3524 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3525 | switch (super_types[mddev->major_version]. |
3526 | load_super(rdev, freshest, mddev->minor_version)) { | |
3527 | case 1: | |
3528 | freshest = rdev; | |
3529 | break; | |
3530 | case 0: | |
3531 | break; | |
3532 | default: | |
9d48739e | 3533 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3534 | bdevname(rdev->bdev,b)); |
fb56dfef | 3535 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3536 | } |
3537 | ||
1da177e4 LT |
3538 | super_types[mddev->major_version]. |
3539 | validate_super(mddev, freshest); | |
3540 | ||
3541 | i = 0; | |
dafb20fa | 3542 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3543 | if (mddev->max_disks && |
3544 | (rdev->desc_nr >= mddev->max_disks || | |
3545 | i > mddev->max_disks)) { | |
9d48739e N |
3546 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3547 | mdname(mddev), bdevname(rdev->bdev, b), | |
3548 | mddev->max_disks); | |
fb56dfef | 3549 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3550 | continue; |
3551 | } | |
1aee41f6 | 3552 | if (rdev != freshest) { |
1da177e4 LT |
3553 | if (super_types[mddev->major_version]. |
3554 | validate_super(mddev, rdev)) { | |
9d48739e | 3555 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3556 | bdevname(rdev->bdev,b)); |
fb56dfef | 3557 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3558 | continue; |
3559 | } | |
1aee41f6 | 3560 | } |
1da177e4 LT |
3561 | if (mddev->level == LEVEL_MULTIPATH) { |
3562 | rdev->desc_nr = i++; | |
3563 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3564 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3565 | } else if (rdev->raid_disk >= |
3566 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3567 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3568 | rdev->raid_disk = -1; |
3569 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3570 | } |
3571 | } | |
1da177e4 LT |
3572 | } |
3573 | ||
72e02075 N |
3574 | /* Read a fixed-point number. |
3575 | * Numbers in sysfs attributes should be in "standard" units where | |
3576 | * possible, so time should be in seconds. | |
f72ffdd6 | 3577 | * However we internally use a a much smaller unit such as |
72e02075 N |
3578 | * milliseconds or jiffies. |
3579 | * This function takes a decimal number with a possible fractional | |
3580 | * component, and produces an integer which is the result of | |
3581 | * multiplying that number by 10^'scale'. | |
3582 | * all without any floating-point arithmetic. | |
3583 | */ | |
3584 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3585 | { | |
3586 | unsigned long result = 0; | |
3587 | long decimals = -1; | |
3588 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3589 | if (*cp == '.') | |
3590 | decimals = 0; | |
3591 | else if (decimals < scale) { | |
3592 | unsigned int value; | |
3593 | value = *cp - '0'; | |
3594 | result = result * 10 + value; | |
3595 | if (decimals >= 0) | |
3596 | decimals++; | |
3597 | } | |
3598 | cp++; | |
3599 | } | |
3600 | if (*cp == '\n') | |
3601 | cp++; | |
3602 | if (*cp) | |
3603 | return -EINVAL; | |
3604 | if (decimals < 0) | |
3605 | decimals = 0; | |
3606 | while (decimals < scale) { | |
3607 | result *= 10; | |
3608 | decimals ++; | |
3609 | } | |
3610 | *res = result; | |
3611 | return 0; | |
3612 | } | |
3613 | ||
16f17b39 | 3614 | static ssize_t |
fd01b88c | 3615 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3616 | { |
3617 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3618 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3619 | } | |
3620 | static ssize_t | |
fd01b88c | 3621 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3622 | { |
16f17b39 | 3623 | unsigned long msec; |
97ce0a7f | 3624 | |
28c1b9fd | 3625 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3626 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3627 | return -EINVAL; |
3628 | } | |
3629 | ||
72e02075 | 3630 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3631 | return -EINVAL; |
16f17b39 N |
3632 | if (msec == 0) |
3633 | mddev->safemode_delay = 0; | |
3634 | else { | |
19052c0e | 3635 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3636 | unsigned long new_delay = (msec*HZ)/1000; |
3637 | ||
3638 | if (new_delay == 0) | |
3639 | new_delay = 1; | |
3640 | mddev->safemode_delay = new_delay; | |
3641 | if (new_delay < old_delay || old_delay == 0) | |
3642 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3643 | } |
3644 | return len; | |
3645 | } | |
3646 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3647 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3648 | |
eae1701f | 3649 | static ssize_t |
fd01b88c | 3650 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3651 | { |
36d091f4 N |
3652 | struct md_personality *p; |
3653 | int ret; | |
3654 | spin_lock(&mddev->lock); | |
3655 | p = mddev->pers; | |
d9d166c2 | 3656 | if (p) |
36d091f4 | 3657 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3658 | else if (mddev->clevel[0]) |
36d091f4 | 3659 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3660 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3661 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3662 | else |
36d091f4 N |
3663 | ret = 0; |
3664 | spin_unlock(&mddev->lock); | |
3665 | return ret; | |
eae1701f N |
3666 | } |
3667 | ||
d9d166c2 | 3668 | static ssize_t |
fd01b88c | 3669 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3670 | { |
f2859af6 | 3671 | char clevel[16]; |
6791875e N |
3672 | ssize_t rv; |
3673 | size_t slen = len; | |
db721d32 | 3674 | struct md_personality *pers, *oldpers; |
f2859af6 | 3675 | long level; |
db721d32 | 3676 | void *priv, *oldpriv; |
3cb03002 | 3677 | struct md_rdev *rdev; |
245f46c2 | 3678 | |
6791875e N |
3679 | if (slen == 0 || slen >= sizeof(clevel)) |
3680 | return -EINVAL; | |
3681 | ||
3682 | rv = mddev_lock(mddev); | |
3683 | if (rv) | |
3684 | return rv; | |
3685 | ||
245f46c2 | 3686 | if (mddev->pers == NULL) { |
6791875e N |
3687 | strncpy(mddev->clevel, buf, slen); |
3688 | if (mddev->clevel[slen-1] == '\n') | |
3689 | slen--; | |
3690 | mddev->clevel[slen] = 0; | |
245f46c2 | 3691 | mddev->level = LEVEL_NONE; |
6791875e N |
3692 | rv = len; |
3693 | goto out_unlock; | |
245f46c2 | 3694 | } |
6791875e | 3695 | rv = -EROFS; |
bd8839e0 | 3696 | if (mddev->ro) |
6791875e | 3697 | goto out_unlock; |
245f46c2 N |
3698 | |
3699 | /* request to change the personality. Need to ensure: | |
3700 | * - array is not engaged in resync/recovery/reshape | |
3701 | * - old personality can be suspended | |
3702 | * - new personality will access other array. | |
3703 | */ | |
3704 | ||
6791875e | 3705 | rv = -EBUSY; |
bb4f1e9d | 3706 | if (mddev->sync_thread || |
f851b60d | 3707 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3708 | mddev->reshape_position != MaxSector || |
3709 | mddev->sysfs_active) | |
6791875e | 3710 | goto out_unlock; |
245f46c2 | 3711 | |
6791875e | 3712 | rv = -EINVAL; |
245f46c2 | 3713 | if (!mddev->pers->quiesce) { |
9d48739e N |
3714 | pr_warn("md: %s: %s does not support online personality change\n", |
3715 | mdname(mddev), mddev->pers->name); | |
6791875e | 3716 | goto out_unlock; |
245f46c2 N |
3717 | } |
3718 | ||
3719 | /* Now find the new personality */ | |
6791875e N |
3720 | strncpy(clevel, buf, slen); |
3721 | if (clevel[slen-1] == '\n') | |
3722 | slen--; | |
3723 | clevel[slen] = 0; | |
b29bebd6 | 3724 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3725 | level = LEVEL_NONE; |
245f46c2 | 3726 | |
f2859af6 DW |
3727 | if (request_module("md-%s", clevel) != 0) |
3728 | request_module("md-level-%s", clevel); | |
245f46c2 | 3729 | spin_lock(&pers_lock); |
f2859af6 | 3730 | pers = find_pers(level, clevel); |
245f46c2 N |
3731 | if (!pers || !try_module_get(pers->owner)) { |
3732 | spin_unlock(&pers_lock); | |
9d48739e | 3733 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3734 | rv = -EINVAL; |
3735 | goto out_unlock; | |
245f46c2 N |
3736 | } |
3737 | spin_unlock(&pers_lock); | |
3738 | ||
3739 | if (pers == mddev->pers) { | |
3740 | /* Nothing to do! */ | |
3741 | module_put(pers->owner); | |
6791875e N |
3742 | rv = len; |
3743 | goto out_unlock; | |
245f46c2 N |
3744 | } |
3745 | if (!pers->takeover) { | |
3746 | module_put(pers->owner); | |
9d48739e N |
3747 | pr_warn("md: %s: %s does not support personality takeover\n", |
3748 | mdname(mddev), clevel); | |
6791875e N |
3749 | rv = -EINVAL; |
3750 | goto out_unlock; | |
245f46c2 N |
3751 | } |
3752 | ||
dafb20fa | 3753 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3754 | rdev->new_raid_disk = rdev->raid_disk; |
3755 | ||
245f46c2 N |
3756 | /* ->takeover must set new_* and/or delta_disks |
3757 | * if it succeeds, and may set them when it fails. | |
3758 | */ | |
3759 | priv = pers->takeover(mddev); | |
3760 | if (IS_ERR(priv)) { | |
3761 | mddev->new_level = mddev->level; | |
3762 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3763 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3764 | mddev->raid_disks -= mddev->delta_disks; |
3765 | mddev->delta_disks = 0; | |
2c810cdd | 3766 | mddev->reshape_backwards = 0; |
245f46c2 | 3767 | module_put(pers->owner); |
9d48739e N |
3768 | pr_warn("md: %s: %s would not accept array\n", |
3769 | mdname(mddev), clevel); | |
6791875e N |
3770 | rv = PTR_ERR(priv); |
3771 | goto out_unlock; | |
245f46c2 N |
3772 | } |
3773 | ||
3774 | /* Looks like we have a winner */ | |
3775 | mddev_suspend(mddev); | |
5aa61f42 | 3776 | mddev_detach(mddev); |
36d091f4 N |
3777 | |
3778 | spin_lock(&mddev->lock); | |
db721d32 N |
3779 | oldpers = mddev->pers; |
3780 | oldpriv = mddev->private; | |
3781 | mddev->pers = pers; | |
3782 | mddev->private = priv; | |
3783 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3784 | mddev->level = mddev->new_level; | |
3785 | mddev->layout = mddev->new_layout; | |
3786 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3787 | mddev->delta_disks = 0; | |
3788 | mddev->reshape_backwards = 0; | |
3789 | mddev->degraded = 0; | |
36d091f4 | 3790 | spin_unlock(&mddev->lock); |
db721d32 N |
3791 | |
3792 | if (oldpers->sync_request == NULL && | |
3793 | mddev->external) { | |
3794 | /* We are converting from a no-redundancy array | |
3795 | * to a redundancy array and metadata is managed | |
3796 | * externally so we need to be sure that writes | |
3797 | * won't block due to a need to transition | |
3798 | * clean->dirty | |
3799 | * until external management is started. | |
3800 | */ | |
3801 | mddev->in_sync = 0; | |
3802 | mddev->safemode_delay = 0; | |
3803 | mddev->safemode = 0; | |
3804 | } | |
f72ffdd6 | 3805 | |
db721d32 N |
3806 | oldpers->free(mddev, oldpriv); |
3807 | ||
3808 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3809 | pers->sync_request != NULL) { |
3810 | /* need to add the md_redundancy_group */ | |
3811 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3812 | pr_warn("md: cannot register extra attributes for %s\n", |
3813 | mdname(mddev)); | |
388975cc | 3814 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3815 | } |
db721d32 | 3816 | if (oldpers->sync_request != NULL && |
a64c876f N |
3817 | pers->sync_request == NULL) { |
3818 | /* need to remove the md_redundancy_group */ | |
3819 | if (mddev->to_remove == NULL) | |
3820 | mddev->to_remove = &md_redundancy_group; | |
3821 | } | |
3822 | ||
4cb9da7d AO |
3823 | module_put(oldpers->owner); |
3824 | ||
dafb20fa | 3825 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3826 | if (rdev->raid_disk < 0) |
3827 | continue; | |
bf2cb0da | 3828 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3829 | rdev->new_raid_disk = -1; |
3830 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3831 | continue; | |
36fad858 | 3832 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3833 | } |
dafb20fa | 3834 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3835 | if (rdev->raid_disk < 0) |
3836 | continue; | |
3837 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3838 | continue; | |
3839 | rdev->raid_disk = rdev->new_raid_disk; | |
3840 | if (rdev->raid_disk < 0) | |
3a981b03 | 3841 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3842 | else { |
36fad858 | 3843 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3844 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3845 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3846 | } |
e93f68a1 N |
3847 | } |
3848 | ||
db721d32 | 3849 | if (pers->sync_request == NULL) { |
9af204cf TM |
3850 | /* this is now an array without redundancy, so |
3851 | * it must always be in_sync | |
3852 | */ | |
3853 | mddev->in_sync = 1; | |
3854 | del_timer_sync(&mddev->safemode_timer); | |
3855 | } | |
02e5f5c0 | 3856 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3857 | pers->run(mddev); |
2953079c | 3858 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3859 | mddev_resume(mddev); |
830778a1 N |
3860 | if (!mddev->thread) |
3861 | md_update_sb(mddev, 1); | |
5cac7861 | 3862 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3863 | md_new_event(mddev); |
6791875e N |
3864 | rv = len; |
3865 | out_unlock: | |
3866 | mddev_unlock(mddev); | |
d9d166c2 N |
3867 | return rv; |
3868 | } | |
3869 | ||
3870 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3871 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3872 | |
d4dbd025 | 3873 | static ssize_t |
fd01b88c | 3874 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3875 | { |
3876 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3877 | if (mddev->reshape_position != MaxSector && |
3878 | mddev->layout != mddev->new_layout) | |
3879 | return sprintf(page, "%d (%d)\n", | |
3880 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3881 | return sprintf(page, "%d\n", mddev->layout); |
3882 | } | |
3883 | ||
3884 | static ssize_t | |
fd01b88c | 3885 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3886 | { |
4c9309c0 | 3887 | unsigned int n; |
6791875e | 3888 | int err; |
d4dbd025 | 3889 | |
4c9309c0 AD |
3890 | err = kstrtouint(buf, 10, &n); |
3891 | if (err < 0) | |
3892 | return err; | |
6791875e N |
3893 | err = mddev_lock(mddev); |
3894 | if (err) | |
3895 | return err; | |
d4dbd025 | 3896 | |
b3546035 | 3897 | if (mddev->pers) { |
50ac168a | 3898 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3899 | err = -EBUSY; |
3900 | else if (mddev->ro) | |
3901 | err = -EROFS; | |
3902 | else { | |
3903 | mddev->new_layout = n; | |
3904 | err = mddev->pers->check_reshape(mddev); | |
3905 | if (err) | |
3906 | mddev->new_layout = mddev->layout; | |
597a711b | 3907 | } |
b3546035 | 3908 | } else { |
08a02ecd | 3909 | mddev->new_layout = n; |
b3546035 N |
3910 | if (mddev->reshape_position == MaxSector) |
3911 | mddev->layout = n; | |
3912 | } | |
6791875e N |
3913 | mddev_unlock(mddev); |
3914 | return err ?: len; | |
d4dbd025 N |
3915 | } |
3916 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 3917 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 3918 | |
eae1701f | 3919 | static ssize_t |
fd01b88c | 3920 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 3921 | { |
bb636547 N |
3922 | if (mddev->raid_disks == 0) |
3923 | return 0; | |
08a02ecd N |
3924 | if (mddev->reshape_position != MaxSector && |
3925 | mddev->delta_disks != 0) | |
3926 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
3927 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
3928 | return sprintf(page, "%d\n", mddev->raid_disks); |
3929 | } | |
3930 | ||
fd01b88c | 3931 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
3932 | |
3933 | static ssize_t | |
fd01b88c | 3934 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 3935 | { |
4c9309c0 | 3936 | unsigned int n; |
6791875e | 3937 | int err; |
da943b99 | 3938 | |
4c9309c0 AD |
3939 | err = kstrtouint(buf, 10, &n); |
3940 | if (err < 0) | |
3941 | return err; | |
da943b99 | 3942 | |
6791875e N |
3943 | err = mddev_lock(mddev); |
3944 | if (err) | |
3945 | return err; | |
da943b99 | 3946 | if (mddev->pers) |
6791875e | 3947 | err = update_raid_disks(mddev, n); |
08a02ecd | 3948 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 3949 | struct md_rdev *rdev; |
08a02ecd | 3950 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 3951 | |
6791875e | 3952 | err = -EINVAL; |
c6563a8c N |
3953 | rdev_for_each(rdev, mddev) { |
3954 | if (olddisks < n && | |
3955 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 3956 | goto out_unlock; |
c6563a8c N |
3957 | if (olddisks > n && |
3958 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 3959 | goto out_unlock; |
c6563a8c | 3960 | } |
6791875e | 3961 | err = 0; |
08a02ecd N |
3962 | mddev->delta_disks = n - olddisks; |
3963 | mddev->raid_disks = n; | |
2c810cdd | 3964 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 3965 | } else |
da943b99 | 3966 | mddev->raid_disks = n; |
6791875e N |
3967 | out_unlock: |
3968 | mddev_unlock(mddev); | |
3969 | return err ? err : len; | |
da943b99 N |
3970 | } |
3971 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 3972 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 3973 | |
3b34380a | 3974 | static ssize_t |
fd01b88c | 3975 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 3976 | { |
08a02ecd | 3977 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
3978 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
3979 | return sprintf(page, "%d (%d)\n", | |
3980 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
3981 | mddev->chunk_sectors << 9); |
3982 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
3983 | } |
3984 | ||
3985 | static ssize_t | |
fd01b88c | 3986 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 3987 | { |
4c9309c0 | 3988 | unsigned long n; |
6791875e | 3989 | int err; |
3b34380a | 3990 | |
4c9309c0 AD |
3991 | err = kstrtoul(buf, 10, &n); |
3992 | if (err < 0) | |
3993 | return err; | |
3b34380a | 3994 | |
6791875e N |
3995 | err = mddev_lock(mddev); |
3996 | if (err) | |
3997 | return err; | |
b3546035 | 3998 | if (mddev->pers) { |
50ac168a | 3999 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4000 | err = -EBUSY; |
4001 | else if (mddev->ro) | |
4002 | err = -EROFS; | |
4003 | else { | |
4004 | mddev->new_chunk_sectors = n >> 9; | |
4005 | err = mddev->pers->check_reshape(mddev); | |
4006 | if (err) | |
4007 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4008 | } |
b3546035 | 4009 | } else { |
664e7c41 | 4010 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4011 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4012 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4013 | } |
6791875e N |
4014 | mddev_unlock(mddev); |
4015 | return err ?: len; | |
3b34380a N |
4016 | } |
4017 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4018 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4019 | |
a94213b1 | 4020 | static ssize_t |
fd01b88c | 4021 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4022 | { |
d1a7c503 N |
4023 | if (mddev->recovery_cp == MaxSector) |
4024 | return sprintf(page, "none\n"); | |
a94213b1 N |
4025 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4026 | } | |
4027 | ||
4028 | static ssize_t | |
fd01b88c | 4029 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4030 | { |
4c9309c0 | 4031 | unsigned long long n; |
6791875e | 4032 | int err; |
4c9309c0 AD |
4033 | |
4034 | if (cmd_match(buf, "none")) | |
4035 | n = MaxSector; | |
4036 | else { | |
4037 | err = kstrtoull(buf, 10, &n); | |
4038 | if (err < 0) | |
4039 | return err; | |
4040 | if (n != (sector_t)n) | |
4041 | return -EINVAL; | |
4042 | } | |
a94213b1 | 4043 | |
6791875e N |
4044 | err = mddev_lock(mddev); |
4045 | if (err) | |
4046 | return err; | |
b098636c | 4047 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4048 | err = -EBUSY; |
a94213b1 | 4049 | |
6791875e N |
4050 | if (!err) { |
4051 | mddev->recovery_cp = n; | |
4052 | if (mddev->pers) | |
2953079c | 4053 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4054 | } |
4055 | mddev_unlock(mddev); | |
4056 | return err ?: len; | |
a94213b1 N |
4057 | } |
4058 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4059 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4060 | resync_start_show, resync_start_store); | |
a94213b1 | 4061 | |
9e653b63 N |
4062 | /* |
4063 | * The array state can be: | |
4064 | * | |
4065 | * clear | |
4066 | * No devices, no size, no level | |
4067 | * Equivalent to STOP_ARRAY ioctl | |
4068 | * inactive | |
4069 | * May have some settings, but array is not active | |
4070 | * all IO results in error | |
4071 | * When written, doesn't tear down array, but just stops it | |
4072 | * suspended (not supported yet) | |
4073 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4074 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4075 | * readonly |
4076 | * no resync can happen. no superblocks get written. | |
4077 | * write requests fail | |
4078 | * read-auto | |
4079 | * like readonly, but behaves like 'clean' on a write request. | |
4080 | * | |
4081 | * clean - no pending writes, but otherwise active. | |
4082 | * When written to inactive array, starts without resync | |
4083 | * If a write request arrives then | |
4084 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4085 | * if not known, block and switch to write-pending | |
4086 | * If written to an active array that has pending writes, then fails. | |
4087 | * active | |
4088 | * fully active: IO and resync can be happening. | |
4089 | * When written to inactive array, starts with resync | |
4090 | * | |
4091 | * write-pending | |
4092 | * clean, but writes are blocked waiting for 'active' to be written. | |
4093 | * | |
4094 | * active-idle | |
4095 | * like active, but no writes have been seen for a while (100msec). | |
4096 | * | |
4097 | */ | |
4098 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
4099 | write_pending, active_idle, bad_word}; | |
05381954 | 4100 | static char *array_states[] = { |
9e653b63 N |
4101 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
4102 | "write-pending", "active-idle", NULL }; | |
4103 | ||
4104 | static int match_word(const char *word, char **list) | |
4105 | { | |
4106 | int n; | |
4107 | for (n=0; list[n]; n++) | |
4108 | if (cmd_match(word, list[n])) | |
4109 | break; | |
4110 | return n; | |
4111 | } | |
4112 | ||
4113 | static ssize_t | |
fd01b88c | 4114 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4115 | { |
4116 | enum array_state st = inactive; | |
4117 | ||
4118 | if (mddev->pers) | |
4119 | switch(mddev->ro) { | |
4120 | case 1: | |
4121 | st = readonly; | |
4122 | break; | |
4123 | case 2: | |
4124 | st = read_auto; | |
4125 | break; | |
4126 | case 0: | |
55cc39f3 | 4127 | spin_lock(&mddev->lock); |
2953079c | 4128 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4129 | st = write_pending; |
16f88949 TM |
4130 | else if (mddev->in_sync) |
4131 | st = clean; | |
9e653b63 N |
4132 | else if (mddev->safemode) |
4133 | st = active_idle; | |
4134 | else | |
4135 | st = active; | |
55cc39f3 | 4136 | spin_unlock(&mddev->lock); |
9e653b63 N |
4137 | } |
4138 | else { | |
4139 | if (list_empty(&mddev->disks) && | |
4140 | mddev->raid_disks == 0 && | |
58c0fed4 | 4141 | mddev->dev_sectors == 0) |
9e653b63 N |
4142 | st = clear; |
4143 | else | |
4144 | st = inactive; | |
4145 | } | |
4146 | return sprintf(page, "%s\n", array_states[st]); | |
4147 | } | |
4148 | ||
f72ffdd6 N |
4149 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4150 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4151 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4152 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4153 | |
4154 | static ssize_t | |
fd01b88c | 4155 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4156 | { |
6497709b | 4157 | int err = 0; |
9e653b63 | 4158 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4159 | |
4160 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4161 | /* don't take reconfig_mutex when toggling between | |
4162 | * clean and active | |
4163 | */ | |
4164 | spin_lock(&mddev->lock); | |
4165 | if (st == active) { | |
4166 | restart_array(mddev); | |
2953079c | 4167 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4168 | md_wakeup_thread(mddev->thread); |
6791875e | 4169 | wake_up(&mddev->sb_wait); |
6791875e N |
4170 | } else /* st == clean */ { |
4171 | restart_array(mddev); | |
6497709b | 4172 | if (!set_in_sync(mddev)) |
6791875e N |
4173 | err = -EBUSY; |
4174 | } | |
573275b5 TM |
4175 | if (!err) |
4176 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4177 | spin_unlock(&mddev->lock); |
c008f1d3 | 4178 | return err ?: len; |
6791875e N |
4179 | } |
4180 | err = mddev_lock(mddev); | |
4181 | if (err) | |
4182 | return err; | |
4183 | err = -EINVAL; | |
9e653b63 N |
4184 | switch(st) { |
4185 | case bad_word: | |
4186 | break; | |
4187 | case clear: | |
4188 | /* stopping an active array */ | |
a05b7ea0 | 4189 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4190 | break; |
4191 | case inactive: | |
4192 | /* stopping an active array */ | |
90cf195d | 4193 | if (mddev->pers) |
a05b7ea0 | 4194 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4195 | else |
e691063a | 4196 | err = 0; /* already inactive */ |
9e653b63 N |
4197 | break; |
4198 | case suspended: | |
4199 | break; /* not supported yet */ | |
4200 | case readonly: | |
4201 | if (mddev->pers) | |
a05b7ea0 | 4202 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4203 | else { |
4204 | mddev->ro = 1; | |
648b629e | 4205 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4206 | err = do_md_run(mddev); |
4207 | } | |
4208 | break; | |
4209 | case read_auto: | |
9e653b63 | 4210 | if (mddev->pers) { |
80268ee9 | 4211 | if (mddev->ro == 0) |
a05b7ea0 | 4212 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4213 | else if (mddev->ro == 1) |
648b629e N |
4214 | err = restart_array(mddev); |
4215 | if (err == 0) { | |
4216 | mddev->ro = 2; | |
4217 | set_disk_ro(mddev->gendisk, 0); | |
4218 | } | |
9e653b63 N |
4219 | } else { |
4220 | mddev->ro = 2; | |
4221 | err = do_md_run(mddev); | |
4222 | } | |
4223 | break; | |
4224 | case clean: | |
4225 | if (mddev->pers) { | |
339421de SL |
4226 | err = restart_array(mddev); |
4227 | if (err) | |
4228 | break; | |
85572d7c | 4229 | spin_lock(&mddev->lock); |
6497709b | 4230 | if (!set_in_sync(mddev)) |
e691063a | 4231 | err = -EBUSY; |
85572d7c | 4232 | spin_unlock(&mddev->lock); |
5bf29597 N |
4233 | } else |
4234 | err = -EINVAL; | |
9e653b63 N |
4235 | break; |
4236 | case active: | |
4237 | if (mddev->pers) { | |
339421de SL |
4238 | err = restart_array(mddev); |
4239 | if (err) | |
4240 | break; | |
2953079c | 4241 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4242 | wake_up(&mddev->sb_wait); |
4243 | err = 0; | |
4244 | } else { | |
4245 | mddev->ro = 0; | |
648b629e | 4246 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4247 | err = do_md_run(mddev); |
4248 | } | |
4249 | break; | |
4250 | case write_pending: | |
4251 | case active_idle: | |
4252 | /* these cannot be set */ | |
4253 | break; | |
4254 | } | |
6791875e N |
4255 | |
4256 | if (!err) { | |
1d23f178 N |
4257 | if (mddev->hold_active == UNTIL_IOCTL) |
4258 | mddev->hold_active = 0; | |
00bcb4ac | 4259 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4260 | } |
6791875e N |
4261 | mddev_unlock(mddev); |
4262 | return err ?: len; | |
9e653b63 | 4263 | } |
80ca3a44 | 4264 | static struct md_sysfs_entry md_array_state = |
750f199e | 4265 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4266 | |
1e50915f | 4267 | static ssize_t |
fd01b88c | 4268 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4269 | return sprintf(page, "%d\n", |
4270 | atomic_read(&mddev->max_corr_read_errors)); | |
4271 | } | |
4272 | ||
4273 | static ssize_t | |
fd01b88c | 4274 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4275 | { |
4c9309c0 AD |
4276 | unsigned int n; |
4277 | int rv; | |
1e50915f | 4278 | |
4c9309c0 AD |
4279 | rv = kstrtouint(buf, 10, &n); |
4280 | if (rv < 0) | |
4281 | return rv; | |
4282 | atomic_set(&mddev->max_corr_read_errors, n); | |
4283 | return len; | |
1e50915f RB |
4284 | } |
4285 | ||
4286 | static struct md_sysfs_entry max_corr_read_errors = | |
4287 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4288 | max_corrected_read_errors_store); | |
4289 | ||
6d7ff738 | 4290 | static ssize_t |
fd01b88c | 4291 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4292 | { |
4293 | return -EINVAL; | |
4294 | } | |
4295 | ||
4296 | static ssize_t | |
fd01b88c | 4297 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4298 | { |
4299 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4300 | /* The new device is added to the array. | |
4301 | * If the array has a persistent superblock, we read the | |
4302 | * superblock to initialise info and check validity. | |
4303 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4304 | * which mainly checks size. | |
4305 | */ | |
4306 | char *e; | |
4307 | int major = simple_strtoul(buf, &e, 10); | |
4308 | int minor; | |
4309 | dev_t dev; | |
3cb03002 | 4310 | struct md_rdev *rdev; |
6d7ff738 N |
4311 | int err; |
4312 | ||
4313 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4314 | return -EINVAL; | |
4315 | minor = simple_strtoul(e+1, &e, 10); | |
4316 | if (*e && *e != '\n') | |
4317 | return -EINVAL; | |
4318 | dev = MKDEV(major, minor); | |
4319 | if (major != MAJOR(dev) || | |
4320 | minor != MINOR(dev)) | |
4321 | return -EOVERFLOW; | |
4322 | ||
6791875e N |
4323 | flush_workqueue(md_misc_wq); |
4324 | ||
4325 | err = mddev_lock(mddev); | |
4326 | if (err) | |
4327 | return err; | |
6d7ff738 N |
4328 | if (mddev->persistent) { |
4329 | rdev = md_import_device(dev, mddev->major_version, | |
4330 | mddev->minor_version); | |
4331 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4332 | struct md_rdev *rdev0 |
4333 | = list_entry(mddev->disks.next, | |
4334 | struct md_rdev, same_set); | |
6d7ff738 N |
4335 | err = super_types[mddev->major_version] |
4336 | .load_super(rdev, rdev0, mddev->minor_version); | |
4337 | if (err < 0) | |
4338 | goto out; | |
4339 | } | |
c5d79adb N |
4340 | } else if (mddev->external) |
4341 | rdev = md_import_device(dev, -2, -1); | |
4342 | else | |
6d7ff738 N |
4343 | rdev = md_import_device(dev, -1, -1); |
4344 | ||
9a8c0fa8 N |
4345 | if (IS_ERR(rdev)) { |
4346 | mddev_unlock(mddev); | |
6d7ff738 | 4347 | return PTR_ERR(rdev); |
9a8c0fa8 | 4348 | } |
6d7ff738 N |
4349 | err = bind_rdev_to_array(rdev, mddev); |
4350 | out: | |
4351 | if (err) | |
4352 | export_rdev(rdev); | |
6791875e | 4353 | mddev_unlock(mddev); |
5492c46e AO |
4354 | if (!err) |
4355 | md_new_event(mddev); | |
6d7ff738 N |
4356 | return err ? err : len; |
4357 | } | |
4358 | ||
4359 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4360 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4361 | |
9b1d1dac | 4362 | static ssize_t |
fd01b88c | 4363 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4364 | { |
4365 | char *end; | |
4366 | unsigned long chunk, end_chunk; | |
6791875e | 4367 | int err; |
9b1d1dac | 4368 | |
6791875e N |
4369 | err = mddev_lock(mddev); |
4370 | if (err) | |
4371 | return err; | |
9b1d1dac PC |
4372 | if (!mddev->bitmap) |
4373 | goto out; | |
4374 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4375 | while (*buf) { | |
4376 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4377 | if (buf == end) break; | |
4378 | if (*end == '-') { /* range */ | |
4379 | buf = end + 1; | |
4380 | end_chunk = simple_strtoul(buf, &end, 0); | |
4381 | if (buf == end) break; | |
4382 | } | |
4383 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4384 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4385 | buf = skip_spaces(end); |
9b1d1dac | 4386 | } |
e64e4018 | 4387 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4388 | out: |
6791875e | 4389 | mddev_unlock(mddev); |
9b1d1dac PC |
4390 | return len; |
4391 | } | |
4392 | ||
4393 | static struct md_sysfs_entry md_bitmap = | |
4394 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4395 | ||
a35b0d69 | 4396 | static ssize_t |
fd01b88c | 4397 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4398 | { |
58c0fed4 AN |
4399 | return sprintf(page, "%llu\n", |
4400 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4401 | } |
4402 | ||
fd01b88c | 4403 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4404 | |
4405 | static ssize_t | |
fd01b88c | 4406 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4407 | { |
4408 | /* If array is inactive, we can reduce the component size, but | |
4409 | * not increase it (except from 0). | |
4410 | * If array is active, we can try an on-line resize | |
4411 | */ | |
b522adcd DW |
4412 | sector_t sectors; |
4413 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4414 | |
58c0fed4 AN |
4415 | if (err < 0) |
4416 | return err; | |
6791875e N |
4417 | err = mddev_lock(mddev); |
4418 | if (err) | |
4419 | return err; | |
a35b0d69 | 4420 | if (mddev->pers) { |
58c0fed4 | 4421 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4422 | if (err == 0) |
4423 | md_update_sb(mddev, 1); | |
a35b0d69 | 4424 | } else { |
58c0fed4 AN |
4425 | if (mddev->dev_sectors == 0 || |
4426 | mddev->dev_sectors > sectors) | |
4427 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4428 | else |
4429 | err = -ENOSPC; | |
4430 | } | |
6791875e | 4431 | mddev_unlock(mddev); |
a35b0d69 N |
4432 | return err ? err : len; |
4433 | } | |
4434 | ||
4435 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4436 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4437 | |
83f0d77a | 4438 | /* Metadata version. |
e691063a N |
4439 | * This is one of |
4440 | * 'none' for arrays with no metadata (good luck...) | |
4441 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4442 | * or N.M for internally known formats |
4443 | */ | |
4444 | static ssize_t | |
fd01b88c | 4445 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4446 | { |
4447 | if (mddev->persistent) | |
4448 | return sprintf(page, "%d.%d\n", | |
4449 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4450 | else if (mddev->external) |
4451 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4452 | else |
4453 | return sprintf(page, "none\n"); | |
4454 | } | |
4455 | ||
4456 | static ssize_t | |
fd01b88c | 4457 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4458 | { |
4459 | int major, minor; | |
4460 | char *e; | |
6791875e | 4461 | int err; |
ea43ddd8 N |
4462 | /* Changing the details of 'external' metadata is |
4463 | * always permitted. Otherwise there must be | |
4464 | * no devices attached to the array. | |
4465 | */ | |
6791875e N |
4466 | |
4467 | err = mddev_lock(mddev); | |
4468 | if (err) | |
4469 | return err; | |
4470 | err = -EBUSY; | |
ea43ddd8 N |
4471 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4472 | ; | |
4473 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4474 | goto out_unlock; |
8bb93aac | 4475 | |
6791875e | 4476 | err = 0; |
8bb93aac N |
4477 | if (cmd_match(buf, "none")) { |
4478 | mddev->persistent = 0; | |
e691063a N |
4479 | mddev->external = 0; |
4480 | mddev->major_version = 0; | |
4481 | mddev->minor_version = 90; | |
6791875e | 4482 | goto out_unlock; |
e691063a N |
4483 | } |
4484 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4485 | size_t namelen = len-9; |
e691063a N |
4486 | if (namelen >= sizeof(mddev->metadata_type)) |
4487 | namelen = sizeof(mddev->metadata_type)-1; | |
4488 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4489 | mddev->metadata_type[namelen] = 0; | |
4490 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4491 | mddev->metadata_type[--namelen] = 0; | |
4492 | mddev->persistent = 0; | |
4493 | mddev->external = 1; | |
8bb93aac N |
4494 | mddev->major_version = 0; |
4495 | mddev->minor_version = 90; | |
6791875e | 4496 | goto out_unlock; |
8bb93aac N |
4497 | } |
4498 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4499 | err = -EINVAL; |
8bb93aac | 4500 | if (e==buf || *e != '.') |
6791875e | 4501 | goto out_unlock; |
8bb93aac N |
4502 | buf = e+1; |
4503 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4504 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4505 | goto out_unlock; |
4506 | err = -ENOENT; | |
50511da3 | 4507 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4508 | goto out_unlock; |
8bb93aac N |
4509 | mddev->major_version = major; |
4510 | mddev->minor_version = minor; | |
4511 | mddev->persistent = 1; | |
e691063a | 4512 | mddev->external = 0; |
6791875e N |
4513 | err = 0; |
4514 | out_unlock: | |
4515 | mddev_unlock(mddev); | |
4516 | return err ?: len; | |
8bb93aac N |
4517 | } |
4518 | ||
4519 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4520 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4521 | |
24dd469d | 4522 | static ssize_t |
fd01b88c | 4523 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4524 | { |
7eec314d | 4525 | char *type = "idle"; |
b7b17c9b N |
4526 | unsigned long recovery = mddev->recovery; |
4527 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4528 | type = "frozen"; |
b7b17c9b N |
4529 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4530 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4531 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4532 | type = "reshape"; |
b7b17c9b N |
4533 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4534 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4535 | type = "resync"; |
b7b17c9b | 4536 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4537 | type = "check"; |
4538 | else | |
4539 | type = "repair"; | |
b7b17c9b | 4540 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4541 | type = "recover"; |
985ca973 N |
4542 | else if (mddev->reshape_position != MaxSector) |
4543 | type = "reshape"; | |
24dd469d N |
4544 | } |
4545 | return sprintf(page, "%s\n", type); | |
4546 | } | |
4547 | ||
4548 | static ssize_t | |
fd01b88c | 4549 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4550 | { |
7eec314d N |
4551 | if (!mddev->pers || !mddev->pers->sync_request) |
4552 | return -EINVAL; | |
4553 | ||
b6a9ce68 N |
4554 | |
4555 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4556 | if (cmd_match(page, "frozen")) |
4557 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4558 | else | |
4559 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4560 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4561 | mddev_lock(mddev) == 0) { | |
4562 | flush_workqueue(md_misc_wq); | |
4563 | if (mddev->sync_thread) { | |
4564 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4565 | md_reap_sync_thread(mddev); |
6791875e | 4566 | } |
8e8e2518 | 4567 | mddev_unlock(mddev); |
7eec314d | 4568 | } |
312045ee | 4569 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4570 | return -EBUSY; |
72a23c21 | 4571 | else if (cmd_match(page, "resync")) |
56ccc112 | 4572 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4573 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4574 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4575 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4576 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4577 | int err; |
4578 | if (mddev->pers->start_reshape == NULL) | |
4579 | return -EINVAL; | |
6791875e N |
4580 | err = mddev_lock(mddev); |
4581 | if (!err) { | |
312045ee N |
4582 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4583 | err = -EBUSY; | |
4584 | else { | |
4585 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4586 | err = mddev->pers->start_reshape(mddev); | |
4587 | } | |
6791875e N |
4588 | mddev_unlock(mddev); |
4589 | } | |
16484bf5 N |
4590 | if (err) |
4591 | return err; | |
a99ac971 | 4592 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4593 | } else { |
bce74dac | 4594 | if (cmd_match(page, "check")) |
7eec314d | 4595 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4596 | else if (!cmd_match(page, "repair")) |
7eec314d | 4597 | return -EINVAL; |
56ccc112 | 4598 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4599 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4600 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4601 | } |
48c26ddc N |
4602 | if (mddev->ro == 2) { |
4603 | /* A write to sync_action is enough to justify | |
4604 | * canceling read-auto mode | |
4605 | */ | |
4606 | mddev->ro = 0; | |
4607 | md_wakeup_thread(mddev->sync_thread); | |
4608 | } | |
03c902e1 | 4609 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4610 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4611 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4612 | return len; |
4613 | } | |
4614 | ||
c4a39551 | 4615 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4616 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4617 | |
4618 | static ssize_t | |
4619 | last_sync_action_show(struct mddev *mddev, char *page) | |
4620 | { | |
4621 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4622 | } | |
4623 | ||
4624 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4625 | ||
9d88883e | 4626 | static ssize_t |
fd01b88c | 4627 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4628 | { |
4629 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4630 | (unsigned long long) |
4631 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4632 | } |
4633 | ||
80ca3a44 | 4634 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4635 | |
88202a0c | 4636 | static ssize_t |
fd01b88c | 4637 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4638 | { |
4639 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4640 | mddev->sync_speed_min ? "local": "system"); | |
4641 | } | |
4642 | ||
4643 | static ssize_t | |
fd01b88c | 4644 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4645 | { |
4c9309c0 AD |
4646 | unsigned int min; |
4647 | int rv; | |
4648 | ||
88202a0c | 4649 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4650 | min = 0; |
4651 | } else { | |
4652 | rv = kstrtouint(buf, 10, &min); | |
4653 | if (rv < 0) | |
4654 | return rv; | |
4655 | if (min == 0) | |
4656 | return -EINVAL; | |
88202a0c | 4657 | } |
88202a0c N |
4658 | mddev->sync_speed_min = min; |
4659 | return len; | |
4660 | } | |
4661 | ||
4662 | static struct md_sysfs_entry md_sync_min = | |
4663 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4664 | ||
4665 | static ssize_t | |
fd01b88c | 4666 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4667 | { |
4668 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4669 | mddev->sync_speed_max ? "local": "system"); | |
4670 | } | |
4671 | ||
4672 | static ssize_t | |
fd01b88c | 4673 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4674 | { |
4c9309c0 AD |
4675 | unsigned int max; |
4676 | int rv; | |
4677 | ||
88202a0c | 4678 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4679 | max = 0; |
4680 | } else { | |
4681 | rv = kstrtouint(buf, 10, &max); | |
4682 | if (rv < 0) | |
4683 | return rv; | |
4684 | if (max == 0) | |
4685 | return -EINVAL; | |
88202a0c | 4686 | } |
88202a0c N |
4687 | mddev->sync_speed_max = max; |
4688 | return len; | |
4689 | } | |
4690 | ||
4691 | static struct md_sysfs_entry md_sync_max = | |
4692 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4693 | ||
d7f3d291 | 4694 | static ssize_t |
fd01b88c | 4695 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4696 | { |
4697 | return sprintf(page, "%d\n", mddev->degraded); | |
4698 | } | |
4699 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4700 | |
90b08710 | 4701 | static ssize_t |
fd01b88c | 4702 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4703 | { |
4704 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4705 | } | |
4706 | ||
4707 | static ssize_t | |
fd01b88c | 4708 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4709 | { |
4710 | long n; | |
4711 | ||
b29bebd6 | 4712 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4713 | return -EINVAL; |
4714 | ||
4715 | if (n != 0 && n != 1) | |
4716 | return -EINVAL; | |
4717 | ||
4718 | mddev->parallel_resync = n; | |
4719 | ||
4720 | if (mddev->sync_thread) | |
4721 | wake_up(&resync_wait); | |
4722 | ||
4723 | return len; | |
4724 | } | |
4725 | ||
4726 | /* force parallel resync, even with shared block devices */ | |
4727 | static struct md_sysfs_entry md_sync_force_parallel = | |
4728 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4729 | sync_force_parallel_show, sync_force_parallel_store); | |
4730 | ||
88202a0c | 4731 | static ssize_t |
fd01b88c | 4732 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4733 | { |
4734 | unsigned long resync, dt, db; | |
d1a7c503 N |
4735 | if (mddev->curr_resync == 0) |
4736 | return sprintf(page, "none\n"); | |
9687a60c AN |
4737 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4738 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4739 | if (!dt) dt++; |
9687a60c AN |
4740 | db = resync - mddev->resync_mark_cnt; |
4741 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4742 | } |
4743 | ||
80ca3a44 | 4744 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4745 | |
4746 | static ssize_t | |
fd01b88c | 4747 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4748 | { |
13ae864b | 4749 | unsigned long long max_sectors, resync; |
88202a0c | 4750 | |
acb180b0 N |
4751 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4752 | return sprintf(page, "none\n"); | |
4753 | ||
72f36d59 N |
4754 | if (mddev->curr_resync == 1 || |
4755 | mddev->curr_resync == 2) | |
4756 | return sprintf(page, "delayed\n"); | |
4757 | ||
c804cdec N |
4758 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4759 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4760 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4761 | else |
58c0fed4 | 4762 | max_sectors = mddev->dev_sectors; |
88202a0c | 4763 | |
acb180b0 | 4764 | resync = mddev->curr_resync_completed; |
13ae864b | 4765 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4766 | } |
4767 | ||
750f199e N |
4768 | static struct md_sysfs_entry md_sync_completed = |
4769 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4770 | |
5e96ee65 | 4771 | static ssize_t |
fd01b88c | 4772 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4773 | { |
4774 | return sprintf(page, "%llu\n", | |
4775 | (unsigned long long)mddev->resync_min); | |
4776 | } | |
4777 | static ssize_t | |
fd01b88c | 4778 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4779 | { |
4780 | unsigned long long min; | |
23da422b | 4781 | int err; |
23da422b | 4782 | |
b29bebd6 | 4783 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4784 | return -EINVAL; |
23da422b N |
4785 | |
4786 | spin_lock(&mddev->lock); | |
4787 | err = -EINVAL; | |
5e96ee65 | 4788 | if (min > mddev->resync_max) |
23da422b N |
4789 | goto out_unlock; |
4790 | ||
4791 | err = -EBUSY; | |
5e96ee65 | 4792 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4793 | goto out_unlock; |
5e96ee65 | 4794 | |
50c37b13 N |
4795 | /* Round down to multiple of 4K for safety */ |
4796 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4797 | err = 0; |
5e96ee65 | 4798 | |
23da422b N |
4799 | out_unlock: |
4800 | spin_unlock(&mddev->lock); | |
4801 | return err ?: len; | |
5e96ee65 NB |
4802 | } |
4803 | ||
4804 | static struct md_sysfs_entry md_min_sync = | |
4805 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4806 | ||
c6207277 | 4807 | static ssize_t |
fd01b88c | 4808 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4809 | { |
4810 | if (mddev->resync_max == MaxSector) | |
4811 | return sprintf(page, "max\n"); | |
4812 | else | |
4813 | return sprintf(page, "%llu\n", | |
4814 | (unsigned long long)mddev->resync_max); | |
4815 | } | |
4816 | static ssize_t | |
fd01b88c | 4817 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4818 | { |
23da422b N |
4819 | int err; |
4820 | spin_lock(&mddev->lock); | |
c6207277 N |
4821 | if (strncmp(buf, "max", 3) == 0) |
4822 | mddev->resync_max = MaxSector; | |
4823 | else { | |
5e96ee65 | 4824 | unsigned long long max; |
23da422b N |
4825 | int chunk; |
4826 | ||
4827 | err = -EINVAL; | |
b29bebd6 | 4828 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4829 | goto out_unlock; |
5e96ee65 | 4830 | if (max < mddev->resync_min) |
23da422b N |
4831 | goto out_unlock; |
4832 | ||
4833 | err = -EBUSY; | |
c6207277 | 4834 | if (max < mddev->resync_max && |
4d484a4a | 4835 | mddev->ro == 0 && |
c6207277 | 4836 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4837 | goto out_unlock; |
c6207277 N |
4838 | |
4839 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4840 | chunk = mddev->chunk_sectors; |
4841 | if (chunk) { | |
2ac06c33 | 4842 | sector_t temp = max; |
23da422b N |
4843 | |
4844 | err = -EINVAL; | |
4845 | if (sector_div(temp, chunk)) | |
4846 | goto out_unlock; | |
c6207277 N |
4847 | } |
4848 | mddev->resync_max = max; | |
4849 | } | |
4850 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4851 | err = 0; |
4852 | out_unlock: | |
4853 | spin_unlock(&mddev->lock); | |
4854 | return err ?: len; | |
c6207277 N |
4855 | } |
4856 | ||
4857 | static struct md_sysfs_entry md_max_sync = | |
4858 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4859 | ||
e464eafd | 4860 | static ssize_t |
fd01b88c | 4861 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4862 | { |
4863 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4864 | } | |
4865 | ||
4866 | static ssize_t | |
fd01b88c | 4867 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4868 | { |
b03e0ccb | 4869 | unsigned long long new; |
6791875e | 4870 | int err; |
e464eafd | 4871 | |
4c9309c0 AD |
4872 | err = kstrtoull(buf, 10, &new); |
4873 | if (err < 0) | |
4874 | return err; | |
4875 | if (new != (sector_t)new) | |
e464eafd | 4876 | return -EINVAL; |
23ddff37 | 4877 | |
6791875e N |
4878 | err = mddev_lock(mddev); |
4879 | if (err) | |
4880 | return err; | |
4881 | err = -EINVAL; | |
4882 | if (mddev->pers == NULL || | |
4883 | mddev->pers->quiesce == NULL) | |
4884 | goto unlock; | |
b03e0ccb | 4885 | mddev_suspend(mddev); |
23ddff37 | 4886 | mddev->suspend_lo = new; |
b03e0ccb N |
4887 | mddev_resume(mddev); |
4888 | ||
6791875e N |
4889 | err = 0; |
4890 | unlock: | |
4891 | mddev_unlock(mddev); | |
4892 | return err ?: len; | |
e464eafd N |
4893 | } |
4894 | static struct md_sysfs_entry md_suspend_lo = | |
4895 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4896 | ||
e464eafd | 4897 | static ssize_t |
fd01b88c | 4898 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4899 | { |
4900 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4901 | } | |
4902 | ||
4903 | static ssize_t | |
fd01b88c | 4904 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4905 | { |
b03e0ccb | 4906 | unsigned long long new; |
6791875e | 4907 | int err; |
e464eafd | 4908 | |
4c9309c0 AD |
4909 | err = kstrtoull(buf, 10, &new); |
4910 | if (err < 0) | |
4911 | return err; | |
4912 | if (new != (sector_t)new) | |
e464eafd | 4913 | return -EINVAL; |
23ddff37 | 4914 | |
6791875e N |
4915 | err = mddev_lock(mddev); |
4916 | if (err) | |
4917 | return err; | |
4918 | err = -EINVAL; | |
b03e0ccb | 4919 | if (mddev->pers == NULL) |
6791875e | 4920 | goto unlock; |
b03e0ccb N |
4921 | |
4922 | mddev_suspend(mddev); | |
23ddff37 | 4923 | mddev->suspend_hi = new; |
b03e0ccb N |
4924 | mddev_resume(mddev); |
4925 | ||
6791875e N |
4926 | err = 0; |
4927 | unlock: | |
4928 | mddev_unlock(mddev); | |
4929 | return err ?: len; | |
e464eafd N |
4930 | } |
4931 | static struct md_sysfs_entry md_suspend_hi = | |
4932 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
4933 | ||
08a02ecd | 4934 | static ssize_t |
fd01b88c | 4935 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
4936 | { |
4937 | if (mddev->reshape_position != MaxSector) | |
4938 | return sprintf(page, "%llu\n", | |
4939 | (unsigned long long)mddev->reshape_position); | |
4940 | strcpy(page, "none\n"); | |
4941 | return 5; | |
4942 | } | |
4943 | ||
4944 | static ssize_t | |
fd01b88c | 4945 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 4946 | { |
c6563a8c | 4947 | struct md_rdev *rdev; |
4c9309c0 | 4948 | unsigned long long new; |
6791875e | 4949 | int err; |
6791875e | 4950 | |
4c9309c0 AD |
4951 | err = kstrtoull(buf, 10, &new); |
4952 | if (err < 0) | |
4953 | return err; | |
4954 | if (new != (sector_t)new) | |
08a02ecd | 4955 | return -EINVAL; |
6791875e N |
4956 | err = mddev_lock(mddev); |
4957 | if (err) | |
4958 | return err; | |
4959 | err = -EBUSY; | |
4960 | if (mddev->pers) | |
4961 | goto unlock; | |
08a02ecd N |
4962 | mddev->reshape_position = new; |
4963 | mddev->delta_disks = 0; | |
2c810cdd | 4964 | mddev->reshape_backwards = 0; |
08a02ecd N |
4965 | mddev->new_level = mddev->level; |
4966 | mddev->new_layout = mddev->layout; | |
664e7c41 | 4967 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
4968 | rdev_for_each(rdev, mddev) |
4969 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
4970 | err = 0; |
4971 | unlock: | |
4972 | mddev_unlock(mddev); | |
4973 | return err ?: len; | |
08a02ecd N |
4974 | } |
4975 | ||
4976 | static struct md_sysfs_entry md_reshape_position = | |
4977 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
4978 | reshape_position_store); | |
4979 | ||
2c810cdd N |
4980 | static ssize_t |
4981 | reshape_direction_show(struct mddev *mddev, char *page) | |
4982 | { | |
4983 | return sprintf(page, "%s\n", | |
4984 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
4985 | } | |
4986 | ||
4987 | static ssize_t | |
4988 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
4989 | { | |
4990 | int backwards = 0; | |
6791875e N |
4991 | int err; |
4992 | ||
2c810cdd N |
4993 | if (cmd_match(buf, "forwards")) |
4994 | backwards = 0; | |
4995 | else if (cmd_match(buf, "backwards")) | |
4996 | backwards = 1; | |
4997 | else | |
4998 | return -EINVAL; | |
4999 | if (mddev->reshape_backwards == backwards) | |
5000 | return len; | |
5001 | ||
6791875e N |
5002 | err = mddev_lock(mddev); |
5003 | if (err) | |
5004 | return err; | |
2c810cdd N |
5005 | /* check if we are allowed to change */ |
5006 | if (mddev->delta_disks) | |
6791875e N |
5007 | err = -EBUSY; |
5008 | else if (mddev->persistent && | |
2c810cdd | 5009 | mddev->major_version == 0) |
6791875e N |
5010 | err = -EINVAL; |
5011 | else | |
5012 | mddev->reshape_backwards = backwards; | |
5013 | mddev_unlock(mddev); | |
5014 | return err ?: len; | |
2c810cdd N |
5015 | } |
5016 | ||
5017 | static struct md_sysfs_entry md_reshape_direction = | |
5018 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5019 | reshape_direction_store); | |
5020 | ||
b522adcd | 5021 | static ssize_t |
fd01b88c | 5022 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5023 | { |
5024 | if (mddev->external_size) | |
5025 | return sprintf(page, "%llu\n", | |
5026 | (unsigned long long)mddev->array_sectors/2); | |
5027 | else | |
5028 | return sprintf(page, "default\n"); | |
5029 | } | |
5030 | ||
5031 | static ssize_t | |
fd01b88c | 5032 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5033 | { |
5034 | sector_t sectors; | |
6791875e N |
5035 | int err; |
5036 | ||
5037 | err = mddev_lock(mddev); | |
5038 | if (err) | |
5039 | return err; | |
b522adcd | 5040 | |
ab5a98b1 | 5041 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5042 | if (mddev_is_clustered(mddev)) { |
5043 | mddev_unlock(mddev); | |
ab5a98b1 | 5044 | return -EINVAL; |
b670883b | 5045 | } |
ab5a98b1 | 5046 | |
b522adcd DW |
5047 | if (strncmp(buf, "default", 7) == 0) { |
5048 | if (mddev->pers) | |
5049 | sectors = mddev->pers->size(mddev, 0, 0); | |
5050 | else | |
5051 | sectors = mddev->array_sectors; | |
5052 | ||
5053 | mddev->external_size = 0; | |
5054 | } else { | |
5055 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5056 | err = -EINVAL; |
5057 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5058 | err = -E2BIG; | |
5059 | else | |
5060 | mddev->external_size = 1; | |
b522adcd DW |
5061 | } |
5062 | ||
6791875e N |
5063 | if (!err) { |
5064 | mddev->array_sectors = sectors; | |
5065 | if (mddev->pers) { | |
5066 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5067 | revalidate_disk(mddev->gendisk); | |
5068 | } | |
cbe6ef1d | 5069 | } |
6791875e N |
5070 | mddev_unlock(mddev); |
5071 | return err ?: len; | |
b522adcd DW |
5072 | } |
5073 | ||
5074 | static struct md_sysfs_entry md_array_size = | |
5075 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5076 | array_size_store); | |
e464eafd | 5077 | |
664aed04 AP |
5078 | static ssize_t |
5079 | consistency_policy_show(struct mddev *mddev, char *page) | |
5080 | { | |
5081 | int ret; | |
5082 | ||
5083 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5084 | ret = sprintf(page, "journal\n"); | |
5085 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5086 | ret = sprintf(page, "ppl\n"); | |
5087 | } else if (mddev->bitmap) { | |
5088 | ret = sprintf(page, "bitmap\n"); | |
5089 | } else if (mddev->pers) { | |
5090 | if (mddev->pers->sync_request) | |
5091 | ret = sprintf(page, "resync\n"); | |
5092 | else | |
5093 | ret = sprintf(page, "none\n"); | |
5094 | } else { | |
5095 | ret = sprintf(page, "unknown\n"); | |
5096 | } | |
5097 | ||
5098 | return ret; | |
5099 | } | |
5100 | ||
5101 | static ssize_t | |
5102 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5103 | { | |
ba903a3e AP |
5104 | int err = 0; |
5105 | ||
664aed04 | 5106 | if (mddev->pers) { |
ba903a3e AP |
5107 | if (mddev->pers->change_consistency_policy) |
5108 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5109 | else | |
5110 | err = -EBUSY; | |
664aed04 AP |
5111 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5112 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5113 | } else { |
ba903a3e | 5114 | err = -EINVAL; |
664aed04 | 5115 | } |
ba903a3e AP |
5116 | |
5117 | return err ? err : len; | |
664aed04 AP |
5118 | } |
5119 | ||
5120 | static struct md_sysfs_entry md_consistency_policy = | |
5121 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5122 | consistency_policy_store); | |
5123 | ||
eae1701f N |
5124 | static struct attribute *md_default_attrs[] = { |
5125 | &md_level.attr, | |
d4dbd025 | 5126 | &md_layout.attr, |
eae1701f | 5127 | &md_raid_disks.attr, |
3b34380a | 5128 | &md_chunk_size.attr, |
a35b0d69 | 5129 | &md_size.attr, |
a94213b1 | 5130 | &md_resync_start.attr, |
8bb93aac | 5131 | &md_metadata.attr, |
6d7ff738 | 5132 | &md_new_device.attr, |
16f17b39 | 5133 | &md_safe_delay.attr, |
9e653b63 | 5134 | &md_array_state.attr, |
08a02ecd | 5135 | &md_reshape_position.attr, |
2c810cdd | 5136 | &md_reshape_direction.attr, |
b522adcd | 5137 | &md_array_size.attr, |
1e50915f | 5138 | &max_corr_read_errors.attr, |
664aed04 | 5139 | &md_consistency_policy.attr, |
411036fa N |
5140 | NULL, |
5141 | }; | |
5142 | ||
5143 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5144 | &md_scan_mode.attr, |
c4a39551 | 5145 | &md_last_scan_mode.attr, |
9d88883e | 5146 | &md_mismatches.attr, |
88202a0c N |
5147 | &md_sync_min.attr, |
5148 | &md_sync_max.attr, | |
5149 | &md_sync_speed.attr, | |
90b08710 | 5150 | &md_sync_force_parallel.attr, |
88202a0c | 5151 | &md_sync_completed.attr, |
5e96ee65 | 5152 | &md_min_sync.attr, |
c6207277 | 5153 | &md_max_sync.attr, |
e464eafd N |
5154 | &md_suspend_lo.attr, |
5155 | &md_suspend_hi.attr, | |
9b1d1dac | 5156 | &md_bitmap.attr, |
d7f3d291 | 5157 | &md_degraded.attr, |
eae1701f N |
5158 | NULL, |
5159 | }; | |
411036fa N |
5160 | static struct attribute_group md_redundancy_group = { |
5161 | .name = NULL, | |
5162 | .attrs = md_redundancy_attrs, | |
5163 | }; | |
5164 | ||
eae1701f N |
5165 | static ssize_t |
5166 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5167 | { | |
5168 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5169 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5170 | ssize_t rv; |
eae1701f N |
5171 | |
5172 | if (!entry->show) | |
5173 | return -EIO; | |
af8a2434 N |
5174 | spin_lock(&all_mddevs_lock); |
5175 | if (list_empty(&mddev->all_mddevs)) { | |
5176 | spin_unlock(&all_mddevs_lock); | |
5177 | return -EBUSY; | |
5178 | } | |
5179 | mddev_get(mddev); | |
5180 | spin_unlock(&all_mddevs_lock); | |
5181 | ||
b7b17c9b | 5182 | rv = entry->show(mddev, page); |
af8a2434 | 5183 | mddev_put(mddev); |
96de1e66 | 5184 | return rv; |
eae1701f N |
5185 | } |
5186 | ||
5187 | static ssize_t | |
5188 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5189 | const char *page, size_t length) | |
5190 | { | |
5191 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5192 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5193 | ssize_t rv; |
eae1701f N |
5194 | |
5195 | if (!entry->store) | |
5196 | return -EIO; | |
67463acb N |
5197 | if (!capable(CAP_SYS_ADMIN)) |
5198 | return -EACCES; | |
af8a2434 N |
5199 | spin_lock(&all_mddevs_lock); |
5200 | if (list_empty(&mddev->all_mddevs)) { | |
5201 | spin_unlock(&all_mddevs_lock); | |
5202 | return -EBUSY; | |
5203 | } | |
5204 | mddev_get(mddev); | |
5205 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5206 | rv = entry->store(mddev, page, length); |
af8a2434 | 5207 | mddev_put(mddev); |
96de1e66 | 5208 | return rv; |
eae1701f N |
5209 | } |
5210 | ||
5211 | static void md_free(struct kobject *ko) | |
5212 | { | |
fd01b88c | 5213 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5214 | |
5215 | if (mddev->sysfs_state) | |
5216 | sysfs_put(mddev->sysfs_state); | |
5217 | ||
d8115c35 BVA |
5218 | if (mddev->gendisk) |
5219 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5220 | if (mddev->queue) |
5221 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5222 | if (mddev->gendisk) |
a21d1504 | 5223 | put_disk(mddev->gendisk); |
4ad23a97 | 5224 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5225 | |
28dec870 KO |
5226 | bioset_exit(&mddev->bio_set); |
5227 | bioset_exit(&mddev->sync_set); | |
eae1701f N |
5228 | kfree(mddev); |
5229 | } | |
5230 | ||
52cf25d0 | 5231 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5232 | .show = md_attr_show, |
5233 | .store = md_attr_store, | |
5234 | }; | |
5235 | static struct kobj_type md_ktype = { | |
5236 | .release = md_free, | |
5237 | .sysfs_ops = &md_sysfs_ops, | |
5238 | .default_attrs = md_default_attrs, | |
5239 | }; | |
5240 | ||
1da177e4 LT |
5241 | int mdp_major = 0; |
5242 | ||
5fd3a17e DW |
5243 | static void mddev_delayed_delete(struct work_struct *ws) |
5244 | { | |
fd01b88c | 5245 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5246 | |
43a70507 | 5247 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5248 | kobject_del(&mddev->kobj); |
5249 | kobject_put(&mddev->kobj); | |
5250 | } | |
5251 | ||
4ad23a97 N |
5252 | static void no_op(struct percpu_ref *r) {} |
5253 | ||
a415c0f1 N |
5254 | int mddev_init_writes_pending(struct mddev *mddev) |
5255 | { | |
5256 | if (mddev->writes_pending.percpu_count_ptr) | |
5257 | return 0; | |
5258 | if (percpu_ref_init(&mddev->writes_pending, no_op, 0, GFP_KERNEL) < 0) | |
5259 | return -ENOMEM; | |
5260 | /* We want to start with the refcount at zero */ | |
5261 | percpu_ref_put(&mddev->writes_pending); | |
5262 | return 0; | |
5263 | } | |
5264 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5265 | ||
efeb53c0 | 5266 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5267 | { |
039b7225 N |
5268 | /* |
5269 | * If dev is zero, name is the name of a device to allocate with | |
5270 | * an arbitrary minor number. It will be "md_???" | |
5271 | * If dev is non-zero it must be a device number with a MAJOR of | |
5272 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5273 | * the device is being created by opening a node in /dev. | |
5274 | * If "name" is not NULL, the device is being created by | |
5275 | * writing to /sys/module/md_mod/parameters/new_array. | |
5276 | */ | |
48c9c27b | 5277 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5278 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5279 | struct gendisk *disk; |
efeb53c0 N |
5280 | int partitioned; |
5281 | int shift; | |
5282 | int unit; | |
3830c62f | 5283 | int error; |
1da177e4 LT |
5284 | |
5285 | if (!mddev) | |
efeb53c0 N |
5286 | return -ENODEV; |
5287 | ||
5288 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5289 | shift = partitioned ? MdpMinorShift : 0; | |
5290 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5291 | |
e804ac78 TH |
5292 | /* wait for any previous instance of this device to be |
5293 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5294 | */ |
e804ac78 | 5295 | flush_workqueue(md_misc_wq); |
d3374825 | 5296 | |
48c9c27b | 5297 | mutex_lock(&disks_mutex); |
0909dc44 N |
5298 | error = -EEXIST; |
5299 | if (mddev->gendisk) | |
5300 | goto abort; | |
efeb53c0 | 5301 | |
039b7225 | 5302 | if (name && !dev) { |
efeb53c0 N |
5303 | /* Need to ensure that 'name' is not a duplicate. |
5304 | */ | |
fd01b88c | 5305 | struct mddev *mddev2; |
efeb53c0 N |
5306 | spin_lock(&all_mddevs_lock); |
5307 | ||
5308 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5309 | if (mddev2->gendisk && | |
5310 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5311 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5312 | goto abort; |
efeb53c0 N |
5313 | } |
5314 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5315 | } |
039b7225 N |
5316 | if (name && dev) |
5317 | /* | |
5318 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5319 | */ | |
5320 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5321 | |
0909dc44 | 5322 | error = -ENOMEM; |
8b765398 | 5323 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5324 | if (!mddev->queue) |
5325 | goto abort; | |
409c57f3 N |
5326 | mddev->queue->queuedata = mddev; |
5327 | ||
409c57f3 | 5328 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5329 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5330 | |
1da177e4 LT |
5331 | disk = alloc_disk(1 << shift); |
5332 | if (!disk) { | |
8b765398 N |
5333 | blk_cleanup_queue(mddev->queue); |
5334 | mddev->queue = NULL; | |
0909dc44 | 5335 | goto abort; |
1da177e4 | 5336 | } |
efeb53c0 | 5337 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5338 | disk->first_minor = unit << shift; |
efeb53c0 N |
5339 | if (name) |
5340 | strcpy(disk->disk_name, name); | |
5341 | else if (partitioned) | |
1da177e4 | 5342 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5343 | else |
1da177e4 | 5344 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5345 | disk->fops = &md_fops; |
5346 | disk->private_data = mddev; | |
5347 | disk->queue = mddev->queue; | |
56883a7e | 5348 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5349 | /* Allow extended partitions. This makes the |
d3374825 | 5350 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5351 | * remove it now. |
5352 | */ | |
5353 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5354 | mddev->gendisk = disk; |
b0140891 N |
5355 | /* As soon as we call add_disk(), another thread could get |
5356 | * through to md_open, so make sure it doesn't get too far | |
5357 | */ | |
5358 | mutex_lock(&mddev->open_mutex); | |
5359 | add_disk(disk); | |
5360 | ||
28dec870 | 5361 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5362 | if (error) { |
5363 | /* This isn't possible, but as kobject_init_and_add is marked | |
5364 | * __must_check, we must do something with the result | |
5365 | */ | |
9d48739e N |
5366 | pr_debug("md: cannot register %s/md - name in use\n", |
5367 | disk->disk_name); | |
0909dc44 N |
5368 | error = 0; |
5369 | } | |
00bcb4ac N |
5370 | if (mddev->kobj.sd && |
5371 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5372 | pr_debug("pointless warning\n"); |
b0140891 | 5373 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5374 | abort: |
5375 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5376 | if (!error && mddev->kobj.sd) { |
3830c62f | 5377 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5378 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5379 | } |
d3374825 | 5380 | mddev_put(mddev); |
0909dc44 | 5381 | return error; |
efeb53c0 N |
5382 | } |
5383 | ||
5384 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5385 | { | |
78b6350d N |
5386 | if (create_on_open) |
5387 | md_alloc(dev, NULL); | |
1da177e4 LT |
5388 | return NULL; |
5389 | } | |
5390 | ||
e4dca7b7 | 5391 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5392 | { |
039b7225 N |
5393 | /* |
5394 | * val must be "md_*" or "mdNNN". | |
5395 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5396 | * set the name to val. val must not already be an active name. |
039b7225 N |
5397 | * For "mdNNN" we allocate an array with the minor number NNN |
5398 | * which must not already be in use. | |
efeb53c0 N |
5399 | */ |
5400 | int len = strlen(val); | |
5401 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5402 | unsigned long devnum; |
efeb53c0 N |
5403 | |
5404 | while (len && val[len-1] == '\n') | |
5405 | len--; | |
5406 | if (len >= DISK_NAME_LEN) | |
5407 | return -E2BIG; | |
5408 | strlcpy(buf, val, len+1); | |
039b7225 N |
5409 | if (strncmp(buf, "md_", 3) == 0) |
5410 | return md_alloc(0, buf); | |
5411 | if (strncmp(buf, "md", 2) == 0 && | |
5412 | isdigit(buf[2]) && | |
5413 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5414 | devnum <= MINORMASK) | |
5415 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5416 | ||
5417 | return -EINVAL; | |
efeb53c0 N |
5418 | } |
5419 | ||
8376d3c1 | 5420 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5421 | { |
8376d3c1 | 5422 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5423 | |
4ad23a97 N |
5424 | mddev->safemode = 1; |
5425 | if (mddev->external) | |
5426 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5427 | ||
1da177e4 LT |
5428 | md_wakeup_thread(mddev->thread); |
5429 | } | |
5430 | ||
6ff8d8ec | 5431 | static int start_dirty_degraded; |
1da177e4 | 5432 | |
fd01b88c | 5433 | int md_run(struct mddev *mddev) |
1da177e4 | 5434 | { |
2604b703 | 5435 | int err; |
3cb03002 | 5436 | struct md_rdev *rdev; |
84fc4b56 | 5437 | struct md_personality *pers; |
1da177e4 | 5438 | |
a757e64c N |
5439 | if (list_empty(&mddev->disks)) |
5440 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5441 | return -EINVAL; |
1da177e4 LT |
5442 | |
5443 | if (mddev->pers) | |
5444 | return -EBUSY; | |
bb4f1e9d N |
5445 | /* Cannot run until previous stop completes properly */ |
5446 | if (mddev->sysfs_active) | |
5447 | return -EBUSY; | |
b6eb127d | 5448 | |
1da177e4 LT |
5449 | /* |
5450 | * Analyze all RAID superblock(s) | |
5451 | */ | |
1ec4a939 N |
5452 | if (!mddev->raid_disks) { |
5453 | if (!mddev->persistent) | |
5454 | return -EINVAL; | |
a757e64c | 5455 | analyze_sbs(mddev); |
1ec4a939 | 5456 | } |
1da177e4 | 5457 | |
d9d166c2 N |
5458 | if (mddev->level != LEVEL_NONE) |
5459 | request_module("md-level-%d", mddev->level); | |
5460 | else if (mddev->clevel[0]) | |
5461 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5462 | |
5463 | /* | |
5464 | * Drop all container device buffers, from now on | |
5465 | * the only valid external interface is through the md | |
5466 | * device. | |
1da177e4 | 5467 | */ |
4b6c1060 | 5468 | mddev->has_superblocks = false; |
dafb20fa | 5469 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5470 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5471 | continue; |
5472 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5473 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5474 | if (mddev->ro != 1 && |
5475 | (bdev_read_only(rdev->bdev) || | |
5476 | bdev_read_only(rdev->meta_bdev))) { | |
5477 | mddev->ro = 1; | |
5478 | if (mddev->gendisk) | |
5479 | set_disk_ro(mddev->gendisk, 1); | |
5480 | } | |
f0d76d70 | 5481 | |
4b6c1060 HM |
5482 | if (rdev->sb_page) |
5483 | mddev->has_superblocks = true; | |
5484 | ||
f0d76d70 N |
5485 | /* perform some consistency tests on the device. |
5486 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5487 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5488 | */ |
a6ff7e08 JB |
5489 | if (rdev->meta_bdev) { |
5490 | /* Nothing to check */; | |
5491 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5492 | if (mddev->dev_sectors && |
5493 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5494 | > rdev->sb_start) { |
9d48739e N |
5495 | pr_warn("md: %s: data overlaps metadata\n", |
5496 | mdname(mddev)); | |
f0d76d70 N |
5497 | return -EINVAL; |
5498 | } | |
5499 | } else { | |
0f420358 | 5500 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5501 | > rdev->data_offset) { |
9d48739e N |
5502 | pr_warn("md: %s: metadata overlaps data\n", |
5503 | mdname(mddev)); | |
f0d76d70 N |
5504 | return -EINVAL; |
5505 | } | |
5506 | } | |
00bcb4ac | 5507 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5508 | } |
5509 | ||
afeee514 KO |
5510 | if (!bioset_initialized(&mddev->bio_set)) { |
5511 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5512 | if (err) | |
5513 | return err; | |
10273170 | 5514 | } |
afeee514 KO |
5515 | if (!bioset_initialized(&mddev->sync_set)) { |
5516 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5517 | if (err) | |
28dec870 | 5518 | return err; |
5a85071c | 5519 | } |
5a409b4f XN |
5520 | if (mddev->flush_pool == NULL) { |
5521 | mddev->flush_pool = mempool_create(NR_FLUSH_INFOS, flush_info_alloc, | |
5522 | flush_info_free, mddev); | |
5523 | if (!mddev->flush_pool) { | |
5524 | err = -ENOMEM; | |
5525 | goto abort; | |
5526 | } | |
5527 | } | |
5528 | if (mddev->flush_bio_pool == NULL) { | |
5529 | mddev->flush_bio_pool = mempool_create(NR_FLUSH_BIOS, flush_bio_alloc, | |
5530 | flush_bio_free, mddev); | |
5531 | if (!mddev->flush_bio_pool) { | |
5532 | err = -ENOMEM; | |
5533 | goto abort; | |
5534 | } | |
5535 | } | |
a167f663 | 5536 | |
1da177e4 | 5537 | spin_lock(&pers_lock); |
d9d166c2 | 5538 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5539 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5540 | spin_unlock(&pers_lock); |
d9d166c2 | 5541 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5542 | pr_warn("md: personality for level %d is not loaded!\n", |
5543 | mddev->level); | |
d9d166c2 | 5544 | else |
9d48739e N |
5545 | pr_warn("md: personality for level %s is not loaded!\n", |
5546 | mddev->clevel); | |
bfc9dfdc SL |
5547 | err = -EINVAL; |
5548 | goto abort; | |
1da177e4 | 5549 | } |
1da177e4 | 5550 | spin_unlock(&pers_lock); |
34817e8c N |
5551 | if (mddev->level != pers->level) { |
5552 | mddev->level = pers->level; | |
5553 | mddev->new_level = pers->level; | |
5554 | } | |
d9d166c2 | 5555 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5556 | |
f6705578 | 5557 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5558 | pers->start_reshape == NULL) { |
f6705578 | 5559 | /* This personality cannot handle reshaping... */ |
f6705578 | 5560 | module_put(pers->owner); |
bfc9dfdc SL |
5561 | err = -EINVAL; |
5562 | goto abort; | |
f6705578 N |
5563 | } |
5564 | ||
7dd5e7c3 N |
5565 | if (pers->sync_request) { |
5566 | /* Warn if this is a potentially silly | |
5567 | * configuration. | |
5568 | */ | |
5569 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5570 | struct md_rdev *rdev2; |
7dd5e7c3 | 5571 | int warned = 0; |
159ec1fc | 5572 | |
dafb20fa N |
5573 | rdev_for_each(rdev, mddev) |
5574 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5575 | if (rdev < rdev2 && |
5576 | rdev->bdev->bd_contains == | |
5577 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5578 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5579 | mdname(mddev), | |
5580 | bdevname(rdev->bdev,b), | |
5581 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5582 | warned = 1; |
5583 | } | |
5584 | } | |
159ec1fc | 5585 | |
7dd5e7c3 | 5586 | if (warned) |
9d48739e | 5587 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5588 | } |
5589 | ||
657390d2 | 5590 | mddev->recovery = 0; |
58c0fed4 AN |
5591 | /* may be over-ridden by personality */ |
5592 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5593 | ||
6ff8d8ec | 5594 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5595 | |
0f9552b5 | 5596 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5597 | mddev->ro = 2; /* read-only, but switch on first write */ |
5598 | ||
36d091f4 | 5599 | err = pers->run(mddev); |
13e53df3 | 5600 | if (err) |
9d48739e | 5601 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5602 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5603 | WARN_ONCE(!mddev->external_size, |
5604 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5605 | __func__); | |
5606 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5607 | (unsigned long long)mddev->array_sectors / 2, | |
5608 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5609 | err = -EINVAL; |
b522adcd | 5610 | } |
36d091f4 | 5611 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5612 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5613 | struct bitmap *bitmap; |
5614 | ||
e64e4018 | 5615 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5616 | if (IS_ERR(bitmap)) { |
5617 | err = PTR_ERR(bitmap); | |
9d48739e N |
5618 | pr_warn("%s: failed to create bitmap (%d)\n", |
5619 | mdname(mddev), err); | |
f9209a32 GR |
5620 | } else |
5621 | mddev->bitmap = bitmap; | |
5622 | ||
b15c2e57 | 5623 | } |
1da177e4 | 5624 | if (err) { |
5aa61f42 | 5625 | mddev_detach(mddev); |
0c35bd47 N |
5626 | if (mddev->private) |
5627 | pers->free(mddev, mddev->private); | |
bd691922 | 5628 | mddev->private = NULL; |
36d091f4 | 5629 | module_put(pers->owner); |
e64e4018 | 5630 | md_bitmap_destroy(mddev); |
bfc9dfdc | 5631 | goto abort; |
1da177e4 | 5632 | } |
5c675f83 | 5633 | if (mddev->queue) { |
bb086a89 SL |
5634 | bool nonrot = true; |
5635 | ||
5636 | rdev_for_each(rdev, mddev) { | |
5637 | if (rdev->raid_disk >= 0 && | |
5638 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5639 | nonrot = false; | |
5640 | break; | |
5641 | } | |
5642 | } | |
5643 | if (mddev->degraded) | |
5644 | nonrot = false; | |
5645 | if (nonrot) | |
8b904b5b | 5646 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5647 | else |
8b904b5b | 5648 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
dc3b17cc JK |
5649 | mddev->queue->backing_dev_info->congested_data = mddev; |
5650 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5651 | } |
36d091f4 | 5652 | if (pers->sync_request) { |
00bcb4ac N |
5653 | if (mddev->kobj.sd && |
5654 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5655 | pr_warn("md: cannot register extra attributes for %s\n", |
5656 | mdname(mddev)); | |
00bcb4ac | 5657 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5658 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5659 | mddev->ro = 0; |
5660 | ||
1e50915f RB |
5661 | atomic_set(&mddev->max_corr_read_errors, |
5662 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5663 | mddev->safemode = 0; |
28c1b9fd GR |
5664 | if (mddev_is_clustered(mddev)) |
5665 | mddev->safemode_delay = 0; | |
5666 | else | |
5667 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5668 | mddev->in_sync = 1; |
0ca69886 | 5669 | smp_wmb(); |
36d091f4 N |
5670 | spin_lock(&mddev->lock); |
5671 | mddev->pers = pers; | |
36d091f4 | 5672 | spin_unlock(&mddev->lock); |
dafb20fa | 5673 | rdev_for_each(rdev, mddev) |
36fad858 NK |
5674 | if (rdev->raid_disk >= 0) |
5675 | if (sysfs_link_rdev(mddev, rdev)) | |
00bcb4ac | 5676 | /* failure here is OK */; |
f72ffdd6 | 5677 | |
a4a3d26d N |
5678 | if (mddev->degraded && !mddev->ro) |
5679 | /* This ensures that recovering status is reported immediately | |
5680 | * via sysfs - until a lack of spares is confirmed. | |
5681 | */ | |
5682 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5683 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5684 | |
2953079c | 5685 | if (mddev->sb_flags) |
850b2b42 | 5686 | md_update_sb(mddev, 0); |
1da177e4 | 5687 | |
d7603b7e | 5688 | md_new_event(mddev); |
00bcb4ac N |
5689 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5690 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
a99ac971 | 5691 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
1da177e4 | 5692 | return 0; |
b126194c XN |
5693 | |
5694 | abort: | |
5a409b4f XN |
5695 | if (mddev->flush_bio_pool) { |
5696 | mempool_destroy(mddev->flush_bio_pool); | |
5697 | mddev->flush_bio_pool = NULL; | |
5698 | } | |
5699 | if (mddev->flush_pool){ | |
5700 | mempool_destroy(mddev->flush_pool); | |
5701 | mddev->flush_pool = NULL; | |
5702 | } | |
b126194c XN |
5703 | |
5704 | return err; | |
1da177e4 | 5705 | } |
390ee602 | 5706 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5707 | |
fd01b88c | 5708 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5709 | { |
5710 | int err; | |
5711 | ||
5712 | err = md_run(mddev); | |
5713 | if (err) | |
5714 | goto out; | |
e64e4018 | 5715 | err = md_bitmap_load(mddev); |
69e51b44 | 5716 | if (err) { |
e64e4018 | 5717 | md_bitmap_destroy(mddev); |
69e51b44 N |
5718 | goto out; |
5719 | } | |
0fd018af | 5720 | |
28c1b9fd GR |
5721 | if (mddev_is_clustered(mddev)) |
5722 | md_allow_write(mddev); | |
5723 | ||
d5d885fd SL |
5724 | /* run start up tasks that require md_thread */ |
5725 | md_start(mddev); | |
5726 | ||
0fd018af JB |
5727 | md_wakeup_thread(mddev->thread); |
5728 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5729 | ||
fe60b014 N |
5730 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5731 | revalidate_disk(mddev->gendisk); | |
f0b4f7e2 | 5732 | mddev->changed = 1; |
fe60b014 N |
5733 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
5734 | out: | |
5735 | return err; | |
5736 | } | |
5737 | ||
d5d885fd SL |
5738 | int md_start(struct mddev *mddev) |
5739 | { | |
5740 | int ret = 0; | |
5741 | ||
5742 | if (mddev->pers->start) { | |
5743 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5744 | md_wakeup_thread(mddev->thread); | |
5745 | ret = mddev->pers->start(mddev); | |
5746 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5747 | md_wakeup_thread(mddev->sync_thread); | |
5748 | } | |
5749 | return ret; | |
5750 | } | |
5751 | EXPORT_SYMBOL_GPL(md_start); | |
5752 | ||
fd01b88c | 5753 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5754 | { |
5755 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
5756 | struct md_rdev *rdev; |
5757 | bool has_journal = false; | |
5758 | bool has_readonly = false; | |
1da177e4 | 5759 | |
80fab1d7 | 5760 | /* Complain if it has no devices */ |
1da177e4 | 5761 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5762 | return -ENXIO; |
5763 | if (!mddev->pers) | |
5764 | return -EINVAL; | |
5765 | if (!mddev->ro) | |
5766 | return -EBUSY; | |
339421de | 5767 | |
97b20ef7 N |
5768 | rcu_read_lock(); |
5769 | rdev_for_each_rcu(rdev, mddev) { | |
5770 | if (test_bit(Journal, &rdev->flags) && | |
5771 | !test_bit(Faulty, &rdev->flags)) | |
5772 | has_journal = true; | |
5773 | if (bdev_read_only(rdev->bdev)) | |
5774 | has_readonly = true; | |
5775 | } | |
5776 | rcu_read_unlock(); | |
5777 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 5778 | /* Don't restart rw with journal missing/faulty */ |
339421de | 5779 | return -EINVAL; |
97b20ef7 N |
5780 | if (has_readonly) |
5781 | return -EROFS; | |
339421de | 5782 | |
80fab1d7 AN |
5783 | mddev->safemode = 0; |
5784 | mddev->ro = 0; | |
5785 | set_disk_ro(disk, 0); | |
9d48739e | 5786 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5787 | /* Kick recovery or resync if necessary */ |
5788 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5789 | md_wakeup_thread(mddev->thread); | |
5790 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5791 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5792 | return 0; |
1da177e4 LT |
5793 | } |
5794 | ||
fd01b88c | 5795 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5796 | { |
5797 | mddev->array_sectors = 0; | |
5798 | mddev->external_size = 0; | |
5799 | mddev->dev_sectors = 0; | |
5800 | mddev->raid_disks = 0; | |
5801 | mddev->recovery_cp = 0; | |
5802 | mddev->resync_min = 0; | |
5803 | mddev->resync_max = MaxSector; | |
5804 | mddev->reshape_position = MaxSector; | |
5805 | mddev->external = 0; | |
5806 | mddev->persistent = 0; | |
5807 | mddev->level = LEVEL_NONE; | |
5808 | mddev->clevel[0] = 0; | |
5809 | mddev->flags = 0; | |
2953079c | 5810 | mddev->sb_flags = 0; |
6177b472 N |
5811 | mddev->ro = 0; |
5812 | mddev->metadata_type[0] = 0; | |
5813 | mddev->chunk_sectors = 0; | |
5814 | mddev->ctime = mddev->utime = 0; | |
5815 | mddev->layout = 0; | |
5816 | mddev->max_disks = 0; | |
5817 | mddev->events = 0; | |
a8707c08 | 5818 | mddev->can_decrease_events = 0; |
6177b472 | 5819 | mddev->delta_disks = 0; |
2c810cdd | 5820 | mddev->reshape_backwards = 0; |
6177b472 N |
5821 | mddev->new_level = LEVEL_NONE; |
5822 | mddev->new_layout = 0; | |
5823 | mddev->new_chunk_sectors = 0; | |
5824 | mddev->curr_resync = 0; | |
7f7583d4 | 5825 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5826 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5827 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5828 | mddev->recovery = 0; | |
5829 | mddev->in_sync = 0; | |
f0b4f7e2 | 5830 | mddev->changed = 0; |
6177b472 | 5831 | mddev->degraded = 0; |
6177b472 | 5832 | mddev->safemode = 0; |
bd691922 | 5833 | mddev->private = NULL; |
c20c33f0 | 5834 | mddev->cluster_info = NULL; |
6177b472 N |
5835 | mddev->bitmap_info.offset = 0; |
5836 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5837 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5838 | mddev->bitmap_info.chunksize = 0; |
5839 | mddev->bitmap_info.daemon_sleep = 0; | |
5840 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 5841 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
5842 | } |
5843 | ||
fd01b88c | 5844 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5845 | { |
6b6204ee | 5846 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5847 | flush_workqueue(md_misc_wq); |
a047e125 | 5848 | if (mddev->sync_thread) { |
a047e125 | 5849 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5850 | md_reap_sync_thread(mddev); |
a047e125 N |
5851 | } |
5852 | ||
5853 | del_timer_sync(&mddev->safemode_timer); | |
5854 | ||
034e33f5 SL |
5855 | if (mddev->pers && mddev->pers->quiesce) { |
5856 | mddev->pers->quiesce(mddev, 1); | |
5857 | mddev->pers->quiesce(mddev, 0); | |
5858 | } | |
e64e4018 | 5859 | md_bitmap_flush(mddev); |
a047e125 | 5860 | |
b6d428c6 | 5861 | if (mddev->ro == 0 && |
28c1b9fd | 5862 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 5863 | mddev->sb_flags)) { |
a047e125 | 5864 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5865 | if (!mddev_is_clustered(mddev)) |
5866 | mddev->in_sync = 1; | |
a047e125 N |
5867 | md_update_sb(mddev, 1); |
5868 | } | |
5869 | } | |
defad61a | 5870 | |
fd01b88c | 5871 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5872 | { |
29f097c4 | 5873 | mddev_lock_nointr(mddev); |
defad61a N |
5874 | __md_stop_writes(mddev); |
5875 | mddev_unlock(mddev); | |
5876 | } | |
390ee602 | 5877 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 5878 | |
5aa61f42 N |
5879 | static void mddev_detach(struct mddev *mddev) |
5880 | { | |
e64e4018 | 5881 | md_bitmap_wait_behind_writes(mddev); |
36d091f4 | 5882 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
5883 | mddev->pers->quiesce(mddev, 1); |
5884 | mddev->pers->quiesce(mddev, 0); | |
5885 | } | |
5886 | md_unregister_thread(&mddev->thread); | |
5887 | if (mddev->queue) | |
5888 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
5889 | } | |
5890 | ||
5eff3c43 | 5891 | static void __md_stop(struct mddev *mddev) |
6177b472 | 5892 | { |
36d091f4 | 5893 | struct md_personality *pers = mddev->pers; |
e64e4018 | 5894 | md_bitmap_destroy(mddev); |
5aa61f42 | 5895 | mddev_detach(mddev); |
ee5d004f N |
5896 | /* Ensure ->event_work is done */ |
5897 | flush_workqueue(md_misc_wq); | |
36d091f4 | 5898 | spin_lock(&mddev->lock); |
6177b472 | 5899 | mddev->pers = NULL; |
36d091f4 N |
5900 | spin_unlock(&mddev->lock); |
5901 | pers->free(mddev, mddev->private); | |
bd691922 | 5902 | mddev->private = NULL; |
36d091f4 N |
5903 | if (pers->sync_request && mddev->to_remove == NULL) |
5904 | mddev->to_remove = &md_redundancy_group; | |
5905 | module_put(pers->owner); | |
cca9cf90 | 5906 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6177b472 | 5907 | } |
5eff3c43 N |
5908 | |
5909 | void md_stop(struct mddev *mddev) | |
5910 | { | |
5911 | /* stop the array and free an attached data structures. | |
5912 | * This is called from dm-raid | |
5913 | */ | |
5914 | __md_stop(mddev); | |
5a409b4f XN |
5915 | if (mddev->flush_bio_pool) { |
5916 | mempool_destroy(mddev->flush_bio_pool); | |
5917 | mddev->flush_bio_pool = NULL; | |
5918 | } | |
5919 | if (mddev->flush_pool) { | |
5920 | mempool_destroy(mddev->flush_pool); | |
5921 | mddev->flush_pool = NULL; | |
5922 | } | |
afeee514 KO |
5923 | bioset_exit(&mddev->bio_set); |
5924 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
5925 | } |
5926 | ||
390ee602 | 5927 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 5928 | |
a05b7ea0 | 5929 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
5930 | { |
5931 | int err = 0; | |
30b8feb7 N |
5932 | int did_freeze = 0; |
5933 | ||
5934 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5935 | did_freeze = 1; | |
5936 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
5937 | md_wakeup_thread(mddev->thread); | |
5938 | } | |
f851b60d | 5939 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 5940 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 5941 | if (mddev->sync_thread) |
30b8feb7 N |
5942 | /* Thread might be blocked waiting for metadata update |
5943 | * which will now never happen */ | |
5944 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 5945 | |
2953079c | 5946 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 5947 | return -EBUSY; |
30b8feb7 | 5948 | mddev_unlock(mddev); |
f851b60d N |
5949 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
5950 | &mddev->recovery)); | |
88724bfa | 5951 | wait_event(mddev->sb_wait, |
2953079c | 5952 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
5953 | mddev_lock_nointr(mddev); |
5954 | ||
a4bd82d0 | 5955 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 5956 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 5957 | mddev->sync_thread || |
af8d8e6f | 5958 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 5959 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
5960 | if (did_freeze) { |
5961 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 5962 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
5963 | md_wakeup_thread(mddev->thread); |
5964 | } | |
a4bd82d0 N |
5965 | err = -EBUSY; |
5966 | goto out; | |
5967 | } | |
5968 | if (mddev->pers) { | |
defad61a | 5969 | __md_stop_writes(mddev); |
a4bd82d0 N |
5970 | |
5971 | err = -ENXIO; | |
5972 | if (mddev->ro==1) | |
5973 | goto out; | |
5974 | mddev->ro = 1; | |
5975 | set_disk_ro(mddev->gendisk, 1); | |
5976 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
5977 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
5978 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 5979 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 5980 | err = 0; |
a4bd82d0 N |
5981 | } |
5982 | out: | |
5983 | mutex_unlock(&mddev->open_mutex); | |
5984 | return err; | |
5985 | } | |
5986 | ||
9e653b63 N |
5987 | /* mode: |
5988 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
5989 | * 2 - stop but do not disassemble array |
5990 | */ | |
f72ffdd6 | 5991 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 5992 | struct block_device *bdev) |
1da177e4 | 5993 | { |
1da177e4 | 5994 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 5995 | struct md_rdev *rdev; |
30b8feb7 N |
5996 | int did_freeze = 0; |
5997 | ||
5998 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
5999 | did_freeze = 1; | |
6000 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6001 | md_wakeup_thread(mddev->thread); | |
6002 | } | |
f851b60d | 6003 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6004 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6005 | if (mddev->sync_thread) |
30b8feb7 N |
6006 | /* Thread might be blocked waiting for metadata update |
6007 | * which will now never happen */ | |
6008 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6009 | |
30b8feb7 | 6010 | mddev_unlock(mddev); |
f851b60d N |
6011 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6012 | !test_bit(MD_RECOVERY_RUNNING, | |
6013 | &mddev->recovery))); | |
30b8feb7 | 6014 | mddev_lock_nointr(mddev); |
1da177e4 | 6015 | |
c8c00a69 | 6016 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6017 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6018 | mddev->sysfs_active || |
6019 | mddev->sync_thread || | |
af8d8e6f | 6020 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6021 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6022 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6023 | if (did_freeze) { |
6024 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6025 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6026 | md_wakeup_thread(mddev->thread); |
6027 | } | |
260fa034 N |
6028 | return -EBUSY; |
6029 | } | |
6e17b027 | 6030 | if (mddev->pers) { |
a4bd82d0 N |
6031 | if (mddev->ro) |
6032 | set_disk_ro(disk, 0); | |
409c57f3 | 6033 | |
defad61a | 6034 | __md_stop_writes(mddev); |
5eff3c43 | 6035 | __md_stop(mddev); |
dc3b17cc | 6036 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 6037 | |
a4bd82d0 | 6038 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6039 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6040 | |
dafb20fa | 6041 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6042 | if (rdev->raid_disk >= 0) |
6043 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6044 | |
a4bd82d0 | 6045 | set_capacity(disk, 0); |
6e17b027 | 6046 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6047 | mddev->changed = 1; |
a4bd82d0 | 6048 | revalidate_disk(disk); |
0d4ca600 | 6049 | |
a4bd82d0 N |
6050 | if (mddev->ro) |
6051 | mddev->ro = 0; | |
6e17b027 N |
6052 | } else |
6053 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6054 | /* |
6055 | * Free resources if final stop | |
6056 | */ | |
9e653b63 | 6057 | if (mode == 0) { |
9d48739e | 6058 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6059 | |
c3d9714e | 6060 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6061 | struct file *f = mddev->bitmap_info.file; |
6062 | spin_lock(&mddev->lock); | |
c3d9714e | 6063 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6064 | spin_unlock(&mddev->lock); |
6065 | fput(f); | |
978f946b | 6066 | } |
c3d9714e | 6067 | mddev->bitmap_info.offset = 0; |
978f946b | 6068 | |
1da177e4 LT |
6069 | export_array(mddev); |
6070 | ||
6177b472 | 6071 | md_clean(mddev); |
efeb53c0 N |
6072 | if (mddev->hold_active == UNTIL_STOP) |
6073 | mddev->hold_active = 0; | |
a4bd82d0 | 6074 | } |
d7603b7e | 6075 | md_new_event(mddev); |
00bcb4ac | 6076 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6077 | return 0; |
1da177e4 LT |
6078 | } |
6079 | ||
fdee8ae4 | 6080 | #ifndef MODULE |
fd01b88c | 6081 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6082 | { |
3cb03002 | 6083 | struct md_rdev *rdev; |
1da177e4 LT |
6084 | int err; |
6085 | ||
a757e64c | 6086 | if (list_empty(&mddev->disks)) |
1da177e4 | 6087 | return; |
1da177e4 | 6088 | |
9d48739e | 6089 | pr_info("md: running: "); |
1da177e4 | 6090 | |
dafb20fa | 6091 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6092 | char b[BDEVNAME_SIZE]; |
9d48739e | 6093 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6094 | } |
9d48739e | 6095 | pr_cont("\n"); |
1da177e4 | 6096 | |
d710e138 | 6097 | err = do_md_run(mddev); |
1da177e4 | 6098 | if (err) { |
9d48739e | 6099 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6100 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6101 | } |
6102 | } | |
6103 | ||
6104 | /* | |
6105 | * lets try to run arrays based on all disks that have arrived | |
6106 | * until now. (those are in pending_raid_disks) | |
6107 | * | |
6108 | * the method: pick the first pending disk, collect all disks with | |
6109 | * the same UUID, remove all from the pending list and put them into | |
6110 | * the 'same_array' list. Then order this list based on superblock | |
6111 | * update time (freshest comes first), kick out 'old' disks and | |
6112 | * compare superblocks. If everything's fine then run it. | |
6113 | * | |
6114 | * If "unit" is allocated, then bump its reference count | |
6115 | */ | |
6116 | static void autorun_devices(int part) | |
6117 | { | |
3cb03002 | 6118 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6119 | struct mddev *mddev; |
1da177e4 LT |
6120 | char b[BDEVNAME_SIZE]; |
6121 | ||
9d48739e | 6122 | pr_info("md: autorun ...\n"); |
1da177e4 | 6123 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6124 | int unit; |
1da177e4 | 6125 | dev_t dev; |
ad01c9e3 | 6126 | LIST_HEAD(candidates); |
1da177e4 | 6127 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6128 | struct md_rdev, same_set); |
1da177e4 | 6129 | |
9d48739e | 6130 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6131 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6132 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6133 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6134 | pr_debug("md: adding %s ...\n", |
6135 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6136 | list_move(&rdev->same_set, &candidates); |
6137 | } | |
6138 | /* | |
6139 | * now we have a set of devices, with all of them having | |
6140 | * mostly sane superblocks. It's time to allocate the | |
6141 | * mddev. | |
6142 | */ | |
e8703fe1 N |
6143 | if (part) { |
6144 | dev = MKDEV(mdp_major, | |
6145 | rdev0->preferred_minor << MdpMinorShift); | |
6146 | unit = MINOR(dev) >> MdpMinorShift; | |
6147 | } else { | |
6148 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6149 | unit = MINOR(dev); | |
6150 | } | |
6151 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6152 | pr_warn("md: unit number in %s is bad: %d\n", |
6153 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6154 | break; |
6155 | } | |
1da177e4 LT |
6156 | |
6157 | md_probe(dev, NULL, NULL); | |
6158 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6159 | if (!mddev || !mddev->gendisk) { |
6160 | if (mddev) | |
6161 | mddev_put(mddev); | |
1da177e4 LT |
6162 | break; |
6163 | } | |
f72ffdd6 | 6164 | if (mddev_lock(mddev)) |
9d48739e | 6165 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6166 | else if (mddev->raid_disks || mddev->major_version |
6167 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6168 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6169 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6170 | mddev_unlock(mddev); | |
6171 | } else { | |
9d48739e | 6172 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6173 | mddev->persistent = 1; |
159ec1fc | 6174 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6175 | list_del_init(&rdev->same_set); |
6176 | if (bind_rdev_to_array(rdev, mddev)) | |
6177 | export_rdev(rdev); | |
6178 | } | |
6179 | autorun_array(mddev); | |
6180 | mddev_unlock(mddev); | |
6181 | } | |
6182 | /* on success, candidates will be empty, on error | |
6183 | * it won't... | |
6184 | */ | |
159ec1fc | 6185 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6186 | list_del_init(&rdev->same_set); |
1da177e4 | 6187 | export_rdev(rdev); |
4b80991c | 6188 | } |
1da177e4 LT |
6189 | mddev_put(mddev); |
6190 | } | |
9d48739e | 6191 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6192 | } |
fdee8ae4 | 6193 | #endif /* !MODULE */ |
1da177e4 | 6194 | |
f72ffdd6 | 6195 | static int get_version(void __user *arg) |
1da177e4 LT |
6196 | { |
6197 | mdu_version_t ver; | |
6198 | ||
6199 | ver.major = MD_MAJOR_VERSION; | |
6200 | ver.minor = MD_MINOR_VERSION; | |
6201 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6202 | ||
6203 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6204 | return -EFAULT; | |
6205 | ||
6206 | return 0; | |
6207 | } | |
6208 | ||
f72ffdd6 | 6209 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6210 | { |
6211 | mdu_array_info_t info; | |
a9f326eb | 6212 | int nr,working,insync,failed,spare; |
3cb03002 | 6213 | struct md_rdev *rdev; |
1da177e4 | 6214 | |
1ca69c4b N |
6215 | nr = working = insync = failed = spare = 0; |
6216 | rcu_read_lock(); | |
6217 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6218 | nr++; |
b2d444d7 | 6219 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6220 | failed++; |
6221 | else { | |
6222 | working++; | |
b2d444d7 | 6223 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6224 | insync++; |
b347af81 SL |
6225 | else if (test_bit(Journal, &rdev->flags)) |
6226 | /* TODO: add journal count to md_u.h */ | |
6227 | ; | |
1da177e4 LT |
6228 | else |
6229 | spare++; | |
6230 | } | |
6231 | } | |
1ca69c4b | 6232 | rcu_read_unlock(); |
1da177e4 LT |
6233 | |
6234 | info.major_version = mddev->major_version; | |
6235 | info.minor_version = mddev->minor_version; | |
6236 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6237 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6238 | info.level = mddev->level; |
58c0fed4 AN |
6239 | info.size = mddev->dev_sectors / 2; |
6240 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6241 | info.size = -1; |
1da177e4 LT |
6242 | info.nr_disks = nr; |
6243 | info.raid_disks = mddev->raid_disks; | |
6244 | info.md_minor = mddev->md_minor; | |
6245 | info.not_persistent= !mddev->persistent; | |
6246 | ||
9ebc6ef1 | 6247 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6248 | info.state = 0; |
6249 | if (mddev->in_sync) | |
6250 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6251 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6252 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6253 | if (mddev_is_clustered(mddev)) |
6254 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6255 | info.active_disks = insync; |
1da177e4 LT |
6256 | info.working_disks = working; |
6257 | info.failed_disks = failed; | |
6258 | info.spare_disks = spare; | |
6259 | ||
6260 | info.layout = mddev->layout; | |
9d8f0363 | 6261 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6262 | |
6263 | if (copy_to_user(arg, &info, sizeof(info))) | |
6264 | return -EFAULT; | |
6265 | ||
6266 | return 0; | |
6267 | } | |
6268 | ||
f72ffdd6 | 6269 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6270 | { |
6271 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6272 | char *ptr; |
4af1a041 | 6273 | int err; |
32a7627c | 6274 | |
b6878d9e | 6275 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6276 | if (!file) |
4af1a041 | 6277 | return -ENOMEM; |
32a7627c | 6278 | |
4af1a041 N |
6279 | err = 0; |
6280 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6281 | /* bitmap enabled */ |
6282 | if (mddev->bitmap_info.file) { | |
6283 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6284 | sizeof(file->pathname)); | |
6285 | if (IS_ERR(ptr)) | |
6286 | err = PTR_ERR(ptr); | |
6287 | else | |
6288 | memmove(file->pathname, ptr, | |
6289 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6290 | } | |
4af1a041 | 6291 | spin_unlock(&mddev->lock); |
32a7627c | 6292 | |
4af1a041 N |
6293 | if (err == 0 && |
6294 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6295 | err = -EFAULT; |
4af1a041 | 6296 | |
32a7627c N |
6297 | kfree(file); |
6298 | return err; | |
6299 | } | |
6300 | ||
f72ffdd6 | 6301 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6302 | { |
6303 | mdu_disk_info_t info; | |
3cb03002 | 6304 | struct md_rdev *rdev; |
1da177e4 LT |
6305 | |
6306 | if (copy_from_user(&info, arg, sizeof(info))) | |
6307 | return -EFAULT; | |
6308 | ||
1ca69c4b | 6309 | rcu_read_lock(); |
57d051dc | 6310 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6311 | if (rdev) { |
6312 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6313 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6314 | info.raid_disk = rdev->raid_disk; | |
6315 | info.state = 0; | |
b2d444d7 | 6316 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6317 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6318 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6319 | info.state |= (1<<MD_DISK_ACTIVE); |
6320 | info.state |= (1<<MD_DISK_SYNC); | |
6321 | } | |
9efdca16 | 6322 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6323 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6324 | if (test_bit(WriteMostly, &rdev->flags)) |
6325 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6326 | if (test_bit(FailFast, &rdev->flags)) |
6327 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6328 | } else { |
6329 | info.major = info.minor = 0; | |
6330 | info.raid_disk = -1; | |
6331 | info.state = (1<<MD_DISK_REMOVED); | |
6332 | } | |
1ca69c4b | 6333 | rcu_read_unlock(); |
1da177e4 LT |
6334 | |
6335 | if (copy_to_user(arg, &info, sizeof(info))) | |
6336 | return -EFAULT; | |
6337 | ||
6338 | return 0; | |
6339 | } | |
6340 | ||
f72ffdd6 | 6341 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6342 | { |
6343 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6344 | struct md_rdev *rdev; |
1da177e4 LT |
6345 | dev_t dev = MKDEV(info->major,info->minor); |
6346 | ||
1aee41f6 GR |
6347 | if (mddev_is_clustered(mddev) && |
6348 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6349 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6350 | mdname(mddev)); | |
1aee41f6 GR |
6351 | return -EINVAL; |
6352 | } | |
6353 | ||
1da177e4 LT |
6354 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6355 | return -EOVERFLOW; | |
6356 | ||
6357 | if (!mddev->raid_disks) { | |
6358 | int err; | |
6359 | /* expecting a device which has a superblock */ | |
6360 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6361 | if (IS_ERR(rdev)) { | |
9d48739e | 6362 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6363 | PTR_ERR(rdev)); |
6364 | return PTR_ERR(rdev); | |
6365 | } | |
6366 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6367 | struct md_rdev *rdev0 |
6368 | = list_entry(mddev->disks.next, | |
6369 | struct md_rdev, same_set); | |
a9f326eb | 6370 | err = super_types[mddev->major_version] |
1da177e4 LT |
6371 | .load_super(rdev, rdev0, mddev->minor_version); |
6372 | if (err < 0) { | |
9d48739e | 6373 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6374 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6375 | bdevname(rdev0->bdev,b2)); |
6376 | export_rdev(rdev); | |
6377 | return -EINVAL; | |
6378 | } | |
6379 | } | |
6380 | err = bind_rdev_to_array(rdev, mddev); | |
6381 | if (err) | |
6382 | export_rdev(rdev); | |
6383 | return err; | |
6384 | } | |
6385 | ||
6386 | /* | |
6387 | * add_new_disk can be used once the array is assembled | |
6388 | * to add "hot spares". They must already have a superblock | |
6389 | * written | |
6390 | */ | |
6391 | if (mddev->pers) { | |
6392 | int err; | |
6393 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6394 | pr_warn("%s: personality does not support diskops!\n", |
6395 | mdname(mddev)); | |
1da177e4 LT |
6396 | return -EINVAL; |
6397 | } | |
7b1e35f6 N |
6398 | if (mddev->persistent) |
6399 | rdev = md_import_device(dev, mddev->major_version, | |
6400 | mddev->minor_version); | |
6401 | else | |
6402 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6403 | if (IS_ERR(rdev)) { |
9d48739e | 6404 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6405 | PTR_ERR(rdev)); |
6406 | return PTR_ERR(rdev); | |
6407 | } | |
1a855a06 | 6408 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6409 | if (!mddev->persistent) { |
6410 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6411 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6412 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6413 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6414 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6415 | } else |
41158c7e | 6416 | rdev->raid_disk = -1; |
f466722c | 6417 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6418 | } else |
6419 | super_types[mddev->major_version]. | |
6420 | validate_super(mddev, rdev); | |
bedd86b7 | 6421 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6422 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6423 | /* This was a hot-add request, but events doesn't |
6424 | * match, so reject it. | |
6425 | */ | |
6426 | export_rdev(rdev); | |
6427 | return -EINVAL; | |
6428 | } | |
6429 | ||
b2d444d7 | 6430 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6431 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6432 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6433 | else |
6434 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6435 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6436 | set_bit(FailFast, &rdev->flags); | |
6437 | else | |
6438 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6439 | |
f6b6ec5c SL |
6440 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6441 | struct md_rdev *rdev2; | |
6442 | bool has_journal = false; | |
6443 | ||
6444 | /* make sure no existing journal disk */ | |
6445 | rdev_for_each(rdev2, mddev) { | |
6446 | if (test_bit(Journal, &rdev2->flags)) { | |
6447 | has_journal = true; | |
6448 | break; | |
6449 | } | |
6450 | } | |
230b55fa | 6451 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6452 | export_rdev(rdev); |
6453 | return -EBUSY; | |
6454 | } | |
bac624f3 | 6455 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6456 | } |
1aee41f6 GR |
6457 | /* |
6458 | * check whether the device shows up in other nodes | |
6459 | */ | |
6460 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6461 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6462 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6463 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6464 | /* --add initiated by this node */ |
dbb64f86 | 6465 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6466 | if (err) { |
1aee41f6 GR |
6467 | export_rdev(rdev); |
6468 | return err; | |
6469 | } | |
6470 | } | |
6471 | } | |
6472 | ||
1da177e4 LT |
6473 | rdev->raid_disk = -1; |
6474 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6475 | |
1da177e4 LT |
6476 | if (err) |
6477 | export_rdev(rdev); | |
dbb64f86 GR |
6478 | |
6479 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6480 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6481 | if (!err) { | |
6482 | err = md_cluster_ops->new_disk_ack(mddev, | |
6483 | err == 0); | |
6484 | if (err) | |
6485 | md_kick_rdev_from_array(rdev); | |
6486 | } | |
6487 | } else { | |
dbb64f86 GR |
6488 | if (err) |
6489 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6490 | else | |
6491 | err = add_bound_rdev(rdev); | |
6492 | } | |
6493 | ||
6494 | } else if (!err) | |
a6da4ef8 | 6495 | err = add_bound_rdev(rdev); |
dbb64f86 | 6496 | |
1da177e4 LT |
6497 | return err; |
6498 | } | |
6499 | ||
6500 | /* otherwise, add_new_disk is only allowed | |
6501 | * for major_version==0 superblocks | |
6502 | */ | |
6503 | if (mddev->major_version != 0) { | |
9d48739e | 6504 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6505 | return -EINVAL; |
6506 | } | |
6507 | ||
6508 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6509 | int err; | |
d710e138 | 6510 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6511 | if (IS_ERR(rdev)) { |
9d48739e | 6512 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6513 | PTR_ERR(rdev)); |
6514 | return PTR_ERR(rdev); | |
6515 | } | |
6516 | rdev->desc_nr = info->number; | |
6517 | if (info->raid_disk < mddev->raid_disks) | |
6518 | rdev->raid_disk = info->raid_disk; | |
6519 | else | |
6520 | rdev->raid_disk = -1; | |
6521 | ||
1da177e4 | 6522 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6523 | if (info->state & (1<<MD_DISK_SYNC)) |
6524 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6525 | |
8ddf9efe N |
6526 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6527 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6528 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6529 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6530 | |
1da177e4 | 6531 | if (!mddev->persistent) { |
9d48739e | 6532 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6533 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6534 | } else | |
57b2caa3 | 6535 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6536 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6537 | |
2bf071bf N |
6538 | err = bind_rdev_to_array(rdev, mddev); |
6539 | if (err) { | |
6540 | export_rdev(rdev); | |
6541 | return err; | |
6542 | } | |
1da177e4 LT |
6543 | } |
6544 | ||
6545 | return 0; | |
6546 | } | |
6547 | ||
f72ffdd6 | 6548 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6549 | { |
6550 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6551 | struct md_rdev *rdev; |
1da177e4 | 6552 | |
c42a0e26 YY |
6553 | if (!mddev->pers) |
6554 | return -ENODEV; | |
6555 | ||
1da177e4 LT |
6556 | rdev = find_rdev(mddev, dev); |
6557 | if (!rdev) | |
6558 | return -ENXIO; | |
6559 | ||
2910ff17 GR |
6560 | if (rdev->raid_disk < 0) |
6561 | goto kick_rdev; | |
293467aa | 6562 | |
3ea8929d N |
6563 | clear_bit(Blocked, &rdev->flags); |
6564 | remove_and_add_spares(mddev, rdev); | |
6565 | ||
1da177e4 LT |
6566 | if (rdev->raid_disk >= 0) |
6567 | goto busy; | |
6568 | ||
2910ff17 | 6569 | kick_rdev: |
54a88392 | 6570 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6571 | md_cluster_ops->remove_disk(mddev, rdev); |
6572 | ||
fb56dfef | 6573 | md_kick_rdev_from_array(rdev); |
2953079c | 6574 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6575 | if (mddev->thread) |
6576 | md_wakeup_thread(mddev->thread); | |
6577 | else | |
6578 | md_update_sb(mddev, 1); | |
d7603b7e | 6579 | md_new_event(mddev); |
1da177e4 LT |
6580 | |
6581 | return 0; | |
6582 | busy: | |
9d48739e N |
6583 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6584 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6585 | return -EBUSY; |
6586 | } | |
6587 | ||
f72ffdd6 | 6588 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6589 | { |
6590 | char b[BDEVNAME_SIZE]; | |
6591 | int err; | |
3cb03002 | 6592 | struct md_rdev *rdev; |
1da177e4 LT |
6593 | |
6594 | if (!mddev->pers) | |
6595 | return -ENODEV; | |
6596 | ||
6597 | if (mddev->major_version != 0) { | |
9d48739e | 6598 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6599 | mdname(mddev)); |
6600 | return -EINVAL; | |
6601 | } | |
6602 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6603 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6604 | mdname(mddev)); |
6605 | return -EINVAL; | |
6606 | } | |
6607 | ||
d710e138 | 6608 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6609 | if (IS_ERR(rdev)) { |
9d48739e | 6610 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6611 | PTR_ERR(rdev)); |
6612 | return -EINVAL; | |
6613 | } | |
6614 | ||
6615 | if (mddev->persistent) | |
57b2caa3 | 6616 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6617 | else |
77304d2a | 6618 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6619 | |
8190e754 | 6620 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6621 | |
b2d444d7 | 6622 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6623 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6624 | bdevname(rdev->bdev,b), mdname(mddev)); |
6625 | err = -EINVAL; | |
6626 | goto abort_export; | |
6627 | } | |
293467aa | 6628 | |
b2d444d7 | 6629 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6630 | rdev->desc_nr = -1; |
5842730d | 6631 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6632 | err = bind_rdev_to_array(rdev, mddev); |
6633 | if (err) | |
2aa82191 | 6634 | goto abort_export; |
1da177e4 LT |
6635 | |
6636 | /* | |
6637 | * The rest should better be atomic, we can have disk failures | |
6638 | * noticed in interrupt contexts ... | |
6639 | */ | |
6640 | ||
1da177e4 LT |
6641 | rdev->raid_disk = -1; |
6642 | ||
2953079c | 6643 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6644 | if (!mddev->thread) |
6645 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6646 | /* |
6647 | * Kick recovery, maybe this spare has to be added to the | |
6648 | * array immediately. | |
6649 | */ | |
6650 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6651 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6652 | md_new_event(mddev); |
1da177e4 LT |
6653 | return 0; |
6654 | ||
1da177e4 LT |
6655 | abort_export: |
6656 | export_rdev(rdev); | |
6657 | return err; | |
6658 | } | |
6659 | ||
fd01b88c | 6660 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6661 | { |
035328c2 | 6662 | int err = 0; |
32a7627c | 6663 | |
36fa3063 | 6664 | if (mddev->pers) { |
d66b1b39 | 6665 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6666 | return -EBUSY; |
6667 | if (mddev->recovery || mddev->sync_thread) | |
6668 | return -EBUSY; | |
6669 | /* we should be able to change the bitmap.. */ | |
6670 | } | |
32a7627c | 6671 | |
36fa3063 | 6672 | if (fd >= 0) { |
035328c2 | 6673 | struct inode *inode; |
1e594bb2 N |
6674 | struct file *f; |
6675 | ||
6676 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6677 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6678 | f = fget(fd); |
32a7627c | 6679 | |
1e594bb2 | 6680 | if (f == NULL) { |
9d48739e N |
6681 | pr_warn("%s: error: failed to get bitmap file\n", |
6682 | mdname(mddev)); | |
36fa3063 N |
6683 | return -EBADF; |
6684 | } | |
6685 | ||
1e594bb2 | 6686 | inode = f->f_mapping->host; |
035328c2 | 6687 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6688 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6689 | mdname(mddev)); | |
035328c2 | 6690 | err = -EBADF; |
1e594bb2 | 6691 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6692 | pr_warn("%s: error: bitmap file must open for write\n", |
6693 | mdname(mddev)); | |
035328c2 N |
6694 | err = -EBADF; |
6695 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6696 | pr_warn("%s: error: bitmap file is already in use\n", |
6697 | mdname(mddev)); | |
035328c2 N |
6698 | err = -EBUSY; |
6699 | } | |
6700 | if (err) { | |
1e594bb2 | 6701 | fput(f); |
36fa3063 N |
6702 | return err; |
6703 | } | |
1e594bb2 | 6704 | mddev->bitmap_info.file = f; |
c3d9714e | 6705 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6706 | } else if (mddev->bitmap == NULL) |
6707 | return -ENOENT; /* cannot remove what isn't there */ | |
6708 | err = 0; | |
6709 | if (mddev->pers) { | |
69e51b44 | 6710 | if (fd >= 0) { |
f9209a32 GR |
6711 | struct bitmap *bitmap; |
6712 | ||
e64e4018 | 6713 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 6714 | mddev_suspend(mddev); |
f9209a32 GR |
6715 | if (!IS_ERR(bitmap)) { |
6716 | mddev->bitmap = bitmap; | |
e64e4018 | 6717 | err = md_bitmap_load(mddev); |
ba599aca N |
6718 | } else |
6719 | err = PTR_ERR(bitmap); | |
52a0d49d | 6720 | if (err) { |
e64e4018 | 6721 | md_bitmap_destroy(mddev); |
52a0d49d N |
6722 | fd = -1; |
6723 | } | |
9e1cc0a5 | 6724 | mddev_resume(mddev); |
52a0d49d | 6725 | } else if (fd < 0) { |
9e1cc0a5 | 6726 | mddev_suspend(mddev); |
e64e4018 | 6727 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 6728 | mddev_resume(mddev); |
d7375ab3 | 6729 | } |
d7375ab3 N |
6730 | } |
6731 | if (fd < 0) { | |
4af1a041 N |
6732 | struct file *f = mddev->bitmap_info.file; |
6733 | if (f) { | |
6734 | spin_lock(&mddev->lock); | |
6735 | mddev->bitmap_info.file = NULL; | |
6736 | spin_unlock(&mddev->lock); | |
6737 | fput(f); | |
6738 | } | |
36fa3063 N |
6739 | } |
6740 | ||
32a7627c N |
6741 | return err; |
6742 | } | |
6743 | ||
1da177e4 LT |
6744 | /* |
6745 | * set_array_info is used two different ways | |
6746 | * The original usage is when creating a new array. | |
6747 | * In this usage, raid_disks is > 0 and it together with | |
6748 | * level, size, not_persistent,layout,chunksize determine the | |
6749 | * shape of the array. | |
6750 | * This will always create an array with a type-0.90.0 superblock. | |
6751 | * The newer usage is when assembling an array. | |
6752 | * In this case raid_disks will be 0, and the major_version field is | |
6753 | * use to determine which style super-blocks are to be found on the devices. | |
6754 | * The minor and patch _version numbers are also kept incase the | |
6755 | * super_block handler wishes to interpret them. | |
6756 | */ | |
f72ffdd6 | 6757 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6758 | { |
6759 | ||
6760 | if (info->raid_disks == 0) { | |
6761 | /* just setting version number for superblock loading */ | |
6762 | if (info->major_version < 0 || | |
50511da3 | 6763 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6764 | super_types[info->major_version].name == NULL) { |
6765 | /* maybe try to auto-load a module? */ | |
9d48739e | 6766 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6767 | info->major_version); |
6768 | return -EINVAL; | |
6769 | } | |
6770 | mddev->major_version = info->major_version; | |
6771 | mddev->minor_version = info->minor_version; | |
6772 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6773 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6774 | /* ensure mddev_put doesn't delete this now that there |
6775 | * is some minimal configuration. | |
6776 | */ | |
9ebc6ef1 | 6777 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6778 | return 0; |
6779 | } | |
6780 | mddev->major_version = MD_MAJOR_VERSION; | |
6781 | mddev->minor_version = MD_MINOR_VERSION; | |
6782 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6783 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6784 | |
6785 | mddev->level = info->level; | |
17115e03 | 6786 | mddev->clevel[0] = 0; |
58c0fed4 | 6787 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6788 | mddev->raid_disks = info->raid_disks; |
6789 | /* don't set md_minor, it is determined by which /dev/md* was | |
6790 | * openned | |
6791 | */ | |
6792 | if (info->state & (1<<MD_SB_CLEAN)) | |
6793 | mddev->recovery_cp = MaxSector; | |
6794 | else | |
6795 | mddev->recovery_cp = 0; | |
6796 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6797 | mddev->external = 0; |
1da177e4 LT |
6798 | |
6799 | mddev->layout = info->layout; | |
9d8f0363 | 6800 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 6801 | |
2953079c | 6802 | if (mddev->persistent) { |
1b3bae49 N |
6803 | mddev->max_disks = MD_SB_DISKS; |
6804 | mddev->flags = 0; | |
6805 | mddev->sb_flags = 0; | |
2953079c SL |
6806 | } |
6807 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6808 | |
c3d9714e | 6809 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6810 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6811 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6812 | |
f6705578 N |
6813 | mddev->reshape_position = MaxSector; |
6814 | ||
1da177e4 LT |
6815 | /* |
6816 | * Generate a 128 bit UUID | |
6817 | */ | |
6818 | get_random_bytes(mddev->uuid, 16); | |
6819 | ||
f6705578 | 6820 | mddev->new_level = mddev->level; |
664e7c41 | 6821 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6822 | mddev->new_layout = mddev->layout; |
6823 | mddev->delta_disks = 0; | |
2c810cdd | 6824 | mddev->reshape_backwards = 0; |
f6705578 | 6825 | |
1da177e4 LT |
6826 | return 0; |
6827 | } | |
6828 | ||
fd01b88c | 6829 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6830 | { |
efa4b77b | 6831 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
6832 | |
6833 | if (mddev->external_size) | |
6834 | return; | |
6835 | ||
1f403624 DW |
6836 | mddev->array_sectors = array_sectors; |
6837 | } | |
6838 | EXPORT_SYMBOL(md_set_array_sectors); | |
6839 | ||
fd01b88c | 6840 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6841 | { |
3cb03002 | 6842 | struct md_rdev *rdev; |
a35b0d69 | 6843 | int rv; |
d71f9f88 | 6844 | int fit = (num_sectors == 0); |
818da59f | 6845 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 6846 | |
a35b0d69 N |
6847 | if (mddev->pers->resize == NULL) |
6848 | return -EINVAL; | |
d71f9f88 AN |
6849 | /* The "num_sectors" is the number of sectors of each device that |
6850 | * is used. This can only make sense for arrays with redundancy. | |
6851 | * linear and raid0 always use whatever space is available. We can only | |
6852 | * consider changing this number if no resync or reconstruction is | |
6853 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6854 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6855 | * of each device. If num_sectors is zero, we find the largest size |
6856 | * that fits. | |
a35b0d69 | 6857 | */ |
f851b60d N |
6858 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6859 | mddev->sync_thread) | |
a35b0d69 | 6860 | return -EBUSY; |
bd8839e0 N |
6861 | if (mddev->ro) |
6862 | return -EROFS; | |
a4a6125a | 6863 | |
dafb20fa | 6864 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6865 | sector_t avail = rdev->sectors; |
01ab5662 | 6866 | |
d71f9f88 AN |
6867 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6868 | num_sectors = avail; | |
6869 | if (avail < num_sectors) | |
a35b0d69 N |
6870 | return -ENOSPC; |
6871 | } | |
d71f9f88 | 6872 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 6873 | if (!rv) { |
818da59f GJ |
6874 | if (mddev_is_clustered(mddev)) |
6875 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
6876 | else if (mddev->queue) { | |
c9483634 GJ |
6877 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6878 | revalidate_disk(mddev->gendisk); | |
6879 | } | |
6880 | } | |
a35b0d69 N |
6881 | return rv; |
6882 | } | |
6883 | ||
fd01b88c | 6884 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
6885 | { |
6886 | int rv; | |
c6563a8c | 6887 | struct md_rdev *rdev; |
da943b99 | 6888 | /* change the number of raid disks */ |
63c70c4f | 6889 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 6890 | return -EINVAL; |
bd8839e0 N |
6891 | if (mddev->ro) |
6892 | return -EROFS; | |
da943b99 | 6893 | if (raid_disks <= 0 || |
233fca36 | 6894 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 6895 | return -EINVAL; |
f851b60d N |
6896 | if (mddev->sync_thread || |
6897 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
6898 | mddev->reshape_position != MaxSector) | |
da943b99 | 6899 | return -EBUSY; |
c6563a8c N |
6900 | |
6901 | rdev_for_each(rdev, mddev) { | |
6902 | if (mddev->raid_disks < raid_disks && | |
6903 | rdev->data_offset < rdev->new_data_offset) | |
6904 | return -EINVAL; | |
6905 | if (mddev->raid_disks > raid_disks && | |
6906 | rdev->data_offset > rdev->new_data_offset) | |
6907 | return -EINVAL; | |
6908 | } | |
6909 | ||
63c70c4f | 6910 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
6911 | if (mddev->delta_disks < 0) |
6912 | mddev->reshape_backwards = 1; | |
6913 | else if (mddev->delta_disks > 0) | |
6914 | mddev->reshape_backwards = 0; | |
63c70c4f N |
6915 | |
6916 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 6917 | if (rv < 0) { |
de171cb9 | 6918 | mddev->delta_disks = 0; |
2c810cdd N |
6919 | mddev->reshape_backwards = 0; |
6920 | } | |
da943b99 N |
6921 | return rv; |
6922 | } | |
6923 | ||
1da177e4 LT |
6924 | /* |
6925 | * update_array_info is used to change the configuration of an | |
6926 | * on-line array. | |
6927 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
6928 | * fields in the info are checked against the array. | |
6929 | * Any differences that cannot be handled will cause an error. | |
6930 | * Normally, only one change can be managed at a time. | |
6931 | */ | |
fd01b88c | 6932 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6933 | { |
6934 | int rv = 0; | |
6935 | int cnt = 0; | |
36fa3063 N |
6936 | int state = 0; |
6937 | ||
6938 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 6939 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 6940 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
6941 | |
6942 | if (mddev->major_version != info->major_version || | |
6943 | mddev->minor_version != info->minor_version || | |
6944 | /* mddev->patch_version != info->patch_version || */ | |
6945 | mddev->ctime != info->ctime || | |
6946 | mddev->level != info->level || | |
6947 | /* mddev->layout != info->layout || */ | |
4e023612 | 6948 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 6949 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
6950 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
6951 | ((state^info->state) & 0xfffffe00) | |
6952 | ) | |
1da177e4 LT |
6953 | return -EINVAL; |
6954 | /* Check there is only one change */ | |
58c0fed4 AN |
6955 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
6956 | cnt++; | |
6957 | if (mddev->raid_disks != info->raid_disks) | |
6958 | cnt++; | |
6959 | if (mddev->layout != info->layout) | |
6960 | cnt++; | |
6961 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
6962 | cnt++; | |
6963 | if (cnt == 0) | |
6964 | return 0; | |
6965 | if (cnt > 1) | |
6966 | return -EINVAL; | |
1da177e4 LT |
6967 | |
6968 | if (mddev->layout != info->layout) { | |
6969 | /* Change layout | |
6970 | * we don't need to do anything at the md level, the | |
6971 | * personality will take care of it all. | |
6972 | */ | |
50ac168a | 6973 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 6974 | return -EINVAL; |
597a711b N |
6975 | else { |
6976 | mddev->new_layout = info->layout; | |
50ac168a | 6977 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
6978 | if (rv) |
6979 | mddev->new_layout = mddev->layout; | |
6980 | return rv; | |
6981 | } | |
1da177e4 | 6982 | } |
58c0fed4 | 6983 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 6984 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 6985 | |
da943b99 N |
6986 | if (mddev->raid_disks != info->raid_disks) |
6987 | rv = update_raid_disks(mddev, info->raid_disks); | |
6988 | ||
36fa3063 | 6989 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
6990 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
6991 | rv = -EINVAL; | |
6992 | goto err; | |
6993 | } | |
6994 | if (mddev->recovery || mddev->sync_thread) { | |
6995 | rv = -EBUSY; | |
6996 | goto err; | |
6997 | } | |
36fa3063 | 6998 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 6999 | struct bitmap *bitmap; |
36fa3063 | 7000 | /* add the bitmap */ |
293467aa GR |
7001 | if (mddev->bitmap) { |
7002 | rv = -EEXIST; | |
7003 | goto err; | |
7004 | } | |
7005 | if (mddev->bitmap_info.default_offset == 0) { | |
7006 | rv = -EINVAL; | |
7007 | goto err; | |
7008 | } | |
c3d9714e N |
7009 | mddev->bitmap_info.offset = |
7010 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7011 | mddev->bitmap_info.space = |
7012 | mddev->bitmap_info.default_space; | |
e64e4018 | 7013 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7014 | mddev_suspend(mddev); |
f9209a32 GR |
7015 | if (!IS_ERR(bitmap)) { |
7016 | mddev->bitmap = bitmap; | |
e64e4018 | 7017 | rv = md_bitmap_load(mddev); |
ba599aca N |
7018 | } else |
7019 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7020 | if (rv) |
e64e4018 | 7021 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7022 | mddev_resume(mddev); |
36fa3063 N |
7023 | } else { |
7024 | /* remove the bitmap */ | |
293467aa GR |
7025 | if (!mddev->bitmap) { |
7026 | rv = -ENOENT; | |
7027 | goto err; | |
7028 | } | |
7029 | if (mddev->bitmap->storage.file) { | |
7030 | rv = -EINVAL; | |
7031 | goto err; | |
7032 | } | |
f6a2dc64 GJ |
7033 | if (mddev->bitmap_info.nodes) { |
7034 | /* hold PW on all the bitmap lock */ | |
7035 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7036 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7037 | rv = -EPERM; |
7038 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7039 | goto err; | |
7040 | } | |
7041 | ||
7042 | mddev->bitmap_info.nodes = 0; | |
7043 | md_cluster_ops->leave(mddev); | |
7044 | } | |
9e1cc0a5 | 7045 | mddev_suspend(mddev); |
e64e4018 | 7046 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7047 | mddev_resume(mddev); |
c3d9714e | 7048 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7049 | } |
7050 | } | |
850b2b42 | 7051 | md_update_sb(mddev, 1); |
293467aa GR |
7052 | return rv; |
7053 | err: | |
1da177e4 LT |
7054 | return rv; |
7055 | } | |
7056 | ||
fd01b88c | 7057 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7058 | { |
3cb03002 | 7059 | struct md_rdev *rdev; |
1ca69c4b | 7060 | int err = 0; |
1da177e4 LT |
7061 | |
7062 | if (mddev->pers == NULL) | |
7063 | return -ENODEV; | |
7064 | ||
1ca69c4b | 7065 | rcu_read_lock(); |
1532d9e8 | 7066 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7067 | if (!rdev) |
1ca69c4b N |
7068 | err = -ENODEV; |
7069 | else { | |
7070 | md_error(mddev, rdev); | |
7071 | if (!test_bit(Faulty, &rdev->flags)) | |
7072 | err = -EBUSY; | |
7073 | } | |
7074 | rcu_read_unlock(); | |
7075 | return err; | |
1da177e4 LT |
7076 | } |
7077 | ||
2f9618ce AN |
7078 | /* |
7079 | * We have a problem here : there is no easy way to give a CHS | |
7080 | * virtual geometry. We currently pretend that we have a 2 heads | |
7081 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7082 | * dosfs just mad... ;-) | |
7083 | */ | |
a885c8c4 CH |
7084 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7085 | { | |
fd01b88c | 7086 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7087 | |
7088 | geo->heads = 2; | |
7089 | geo->sectors = 4; | |
49ce6cea | 7090 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7091 | return 0; |
7092 | } | |
7093 | ||
cb335f88 NS |
7094 | static inline bool md_ioctl_valid(unsigned int cmd) |
7095 | { | |
7096 | switch (cmd) { | |
7097 | case ADD_NEW_DISK: | |
7098 | case BLKROSET: | |
7099 | case GET_ARRAY_INFO: | |
7100 | case GET_BITMAP_FILE: | |
7101 | case GET_DISK_INFO: | |
7102 | case HOT_ADD_DISK: | |
7103 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7104 | case RAID_AUTORUN: |
7105 | case RAID_VERSION: | |
7106 | case RESTART_ARRAY_RW: | |
7107 | case RUN_ARRAY: | |
7108 | case SET_ARRAY_INFO: | |
7109 | case SET_BITMAP_FILE: | |
7110 | case SET_DISK_FAULTY: | |
7111 | case STOP_ARRAY: | |
7112 | case STOP_ARRAY_RO: | |
1aee41f6 | 7113 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7114 | return true; |
7115 | default: | |
7116 | return false; | |
7117 | } | |
7118 | } | |
7119 | ||
a39907fa | 7120 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7121 | unsigned int cmd, unsigned long arg) |
7122 | { | |
7123 | int err = 0; | |
7124 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7125 | struct mddev *mddev = NULL; |
e2218350 | 7126 | int ro; |
065e519e | 7127 | bool did_set_md_closing = false; |
1da177e4 | 7128 | |
cb335f88 NS |
7129 | if (!md_ioctl_valid(cmd)) |
7130 | return -ENOTTY; | |
7131 | ||
506c9e44 N |
7132 | switch (cmd) { |
7133 | case RAID_VERSION: | |
7134 | case GET_ARRAY_INFO: | |
7135 | case GET_DISK_INFO: | |
7136 | break; | |
7137 | default: | |
7138 | if (!capable(CAP_SYS_ADMIN)) | |
7139 | return -EACCES; | |
7140 | } | |
1da177e4 LT |
7141 | |
7142 | /* | |
7143 | * Commands dealing with the RAID driver but not any | |
7144 | * particular array: | |
7145 | */ | |
c02c0aeb N |
7146 | switch (cmd) { |
7147 | case RAID_VERSION: | |
7148 | err = get_version(argp); | |
3adc28d8 | 7149 | goto out; |
1da177e4 | 7150 | |
1da177e4 | 7151 | #ifndef MODULE |
c02c0aeb N |
7152 | case RAID_AUTORUN: |
7153 | err = 0; | |
7154 | autostart_arrays(arg); | |
3adc28d8 | 7155 | goto out; |
1da177e4 | 7156 | #endif |
c02c0aeb | 7157 | default:; |
1da177e4 LT |
7158 | } |
7159 | ||
7160 | /* | |
7161 | * Commands creating/starting a new array: | |
7162 | */ | |
7163 | ||
a39907fa | 7164 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7165 | |
7166 | if (!mddev) { | |
7167 | BUG(); | |
3adc28d8 | 7168 | goto out; |
1da177e4 LT |
7169 | } |
7170 | ||
1ca69c4b N |
7171 | /* Some actions do not requires the mutex */ |
7172 | switch (cmd) { | |
7173 | case GET_ARRAY_INFO: | |
7174 | if (!mddev->raid_disks && !mddev->external) | |
7175 | err = -ENODEV; | |
7176 | else | |
7177 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7178 | goto out; |
1ca69c4b N |
7179 | |
7180 | case GET_DISK_INFO: | |
7181 | if (!mddev->raid_disks && !mddev->external) | |
7182 | err = -ENODEV; | |
7183 | else | |
7184 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7185 | goto out; |
1ca69c4b N |
7186 | |
7187 | case SET_DISK_FAULTY: | |
7188 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7189 | goto out; |
4af1a041 N |
7190 | |
7191 | case GET_BITMAP_FILE: | |
7192 | err = get_bitmap_file(mddev, argp); | |
7193 | goto out; | |
7194 | ||
1ca69c4b N |
7195 | } |
7196 | ||
a7a3f08d N |
7197 | if (cmd == ADD_NEW_DISK) |
7198 | /* need to ensure md_delayed_delete() has completed */ | |
7199 | flush_workqueue(md_misc_wq); | |
7200 | ||
90f5f7ad HR |
7201 | if (cmd == HOT_REMOVE_DISK) |
7202 | /* need to ensure recovery thread has run */ | |
7203 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7204 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7205 | &mddev->recovery), |
90f5f7ad | 7206 | msecs_to_jiffies(5000)); |
260fa034 N |
7207 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7208 | /* Need to flush page cache, and ensure no-one else opens | |
7209 | * and writes | |
7210 | */ | |
7211 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7212 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7213 | mutex_unlock(&mddev->open_mutex); |
7214 | err = -EBUSY; | |
3adc28d8 | 7215 | goto out; |
260fa034 | 7216 | } |
065e519e | 7217 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7218 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7219 | did_set_md_closing = true; |
260fa034 N |
7220 | mutex_unlock(&mddev->open_mutex); |
7221 | sync_blockdev(bdev); | |
7222 | } | |
1da177e4 LT |
7223 | err = mddev_lock(mddev); |
7224 | if (err) { | |
9d48739e N |
7225 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7226 | err, cmd); | |
3adc28d8 | 7227 | goto out; |
1da177e4 LT |
7228 | } |
7229 | ||
c02c0aeb N |
7230 | if (cmd == SET_ARRAY_INFO) { |
7231 | mdu_array_info_t info; | |
7232 | if (!arg) | |
7233 | memset(&info, 0, sizeof(info)); | |
7234 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7235 | err = -EFAULT; | |
3adc28d8 | 7236 | goto unlock; |
c02c0aeb N |
7237 | } |
7238 | if (mddev->pers) { | |
7239 | err = update_array_info(mddev, &info); | |
7240 | if (err) { | |
9d48739e | 7241 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7242 | goto unlock; |
1da177e4 | 7243 | } |
3adc28d8 | 7244 | goto unlock; |
c02c0aeb N |
7245 | } |
7246 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7247 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7248 | err = -EBUSY; |
3adc28d8 | 7249 | goto unlock; |
c02c0aeb N |
7250 | } |
7251 | if (mddev->raid_disks) { | |
9d48739e | 7252 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7253 | err = -EBUSY; |
3adc28d8 | 7254 | goto unlock; |
c02c0aeb N |
7255 | } |
7256 | err = set_array_info(mddev, &info); | |
7257 | if (err) { | |
9d48739e | 7258 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7259 | goto unlock; |
c02c0aeb | 7260 | } |
3adc28d8 | 7261 | goto unlock; |
1da177e4 LT |
7262 | } |
7263 | ||
7264 | /* | |
7265 | * Commands querying/configuring an existing array: | |
7266 | */ | |
32a7627c | 7267 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7268 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7269 | if ((!mddev->raid_disks && !mddev->external) |
7270 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7271 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7272 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7273 | err = -ENODEV; |
3adc28d8 | 7274 | goto unlock; |
1da177e4 LT |
7275 | } |
7276 | ||
7277 | /* | |
7278 | * Commands even a read-only array can execute: | |
7279 | */ | |
c02c0aeb | 7280 | switch (cmd) { |
c02c0aeb N |
7281 | case RESTART_ARRAY_RW: |
7282 | err = restart_array(mddev); | |
3adc28d8 | 7283 | goto unlock; |
1da177e4 | 7284 | |
c02c0aeb N |
7285 | case STOP_ARRAY: |
7286 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7287 | goto unlock; |
1da177e4 | 7288 | |
c02c0aeb N |
7289 | case STOP_ARRAY_RO: |
7290 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7291 | goto unlock; |
1da177e4 | 7292 | |
3ea8929d N |
7293 | case HOT_REMOVE_DISK: |
7294 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7295 | goto unlock; |
3ea8929d | 7296 | |
7ceb17e8 N |
7297 | case ADD_NEW_DISK: |
7298 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7299 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7300 | * So require mddev->pers and MD_DISK_SYNC. |
7301 | */ | |
7302 | if (mddev->pers) { | |
7303 | mdu_disk_info_t info; | |
7304 | if (copy_from_user(&info, argp, sizeof(info))) | |
7305 | err = -EFAULT; | |
7306 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7307 | /* Need to clear read-only for this */ | |
7308 | break; | |
7309 | else | |
7310 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7311 | goto unlock; |
7ceb17e8 N |
7312 | } |
7313 | break; | |
7314 | ||
c02c0aeb N |
7315 | case BLKROSET: |
7316 | if (get_user(ro, (int __user *)(arg))) { | |
7317 | err = -EFAULT; | |
3adc28d8 | 7318 | goto unlock; |
c02c0aeb N |
7319 | } |
7320 | err = -EINVAL; | |
e2218350 | 7321 | |
c02c0aeb N |
7322 | /* if the bdev is going readonly the value of mddev->ro |
7323 | * does not matter, no writes are coming | |
7324 | */ | |
7325 | if (ro) | |
3adc28d8 | 7326 | goto unlock; |
e2218350 | 7327 | |
c02c0aeb N |
7328 | /* are we are already prepared for writes? */ |
7329 | if (mddev->ro != 1) | |
3adc28d8 | 7330 | goto unlock; |
e2218350 | 7331 | |
c02c0aeb N |
7332 | /* transitioning to readauto need only happen for |
7333 | * arrays that call md_write_start | |
7334 | */ | |
7335 | if (mddev->pers) { | |
7336 | err = restart_array(mddev); | |
7337 | if (err == 0) { | |
7338 | mddev->ro = 2; | |
7339 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7340 | } |
c02c0aeb | 7341 | } |
3adc28d8 | 7342 | goto unlock; |
1da177e4 LT |
7343 | } |
7344 | ||
7345 | /* | |
7346 | * The remaining ioctls are changing the state of the | |
f91de92e | 7347 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7348 | */ |
326eb17d | 7349 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7350 | if (mddev->ro == 2) { |
7351 | mddev->ro = 0; | |
00bcb4ac | 7352 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7353 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7354 | /* mddev_unlock will wake thread */ |
7355 | /* If a device failed while we were read-only, we | |
7356 | * need to make sure the metadata is updated now. | |
7357 | */ | |
2953079c | 7358 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7359 | mddev_unlock(mddev); |
7360 | wait_event(mddev->sb_wait, | |
2953079c SL |
7361 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7362 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7363 | mddev_lock_nointr(mddev); |
f3378b48 | 7364 | } |
f91de92e N |
7365 | } else { |
7366 | err = -EROFS; | |
3adc28d8 | 7367 | goto unlock; |
f91de92e | 7368 | } |
1da177e4 LT |
7369 | } |
7370 | ||
c02c0aeb N |
7371 | switch (cmd) { |
7372 | case ADD_NEW_DISK: | |
1da177e4 | 7373 | { |
c02c0aeb N |
7374 | mdu_disk_info_t info; |
7375 | if (copy_from_user(&info, argp, sizeof(info))) | |
7376 | err = -EFAULT; | |
7377 | else | |
7378 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7379 | goto unlock; |
c02c0aeb | 7380 | } |
1da177e4 | 7381 | |
1aee41f6 GR |
7382 | case CLUSTERED_DISK_NACK: |
7383 | if (mddev_is_clustered(mddev)) | |
7384 | md_cluster_ops->new_disk_ack(mddev, false); | |
7385 | else | |
7386 | err = -EINVAL; | |
7387 | goto unlock; | |
7388 | ||
c02c0aeb N |
7389 | case HOT_ADD_DISK: |
7390 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7391 | goto unlock; |
1da177e4 | 7392 | |
c02c0aeb N |
7393 | case RUN_ARRAY: |
7394 | err = do_md_run(mddev); | |
3adc28d8 | 7395 | goto unlock; |
1da177e4 | 7396 | |
c02c0aeb N |
7397 | case SET_BITMAP_FILE: |
7398 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7399 | goto unlock; |
32a7627c | 7400 | |
c02c0aeb N |
7401 | default: |
7402 | err = -EINVAL; | |
3adc28d8 | 7403 | goto unlock; |
1da177e4 LT |
7404 | } |
7405 | ||
3adc28d8 | 7406 | unlock: |
d3374825 N |
7407 | if (mddev->hold_active == UNTIL_IOCTL && |
7408 | err != -EINVAL) | |
7409 | mddev->hold_active = 0; | |
1da177e4 | 7410 | mddev_unlock(mddev); |
3adc28d8 | 7411 | out: |
065e519e N |
7412 | if(did_set_md_closing) |
7413 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7414 | return err; |
7415 | } | |
aa98aa31 AB |
7416 | #ifdef CONFIG_COMPAT |
7417 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7418 | unsigned int cmd, unsigned long arg) | |
7419 | { | |
7420 | switch (cmd) { | |
7421 | case HOT_REMOVE_DISK: | |
7422 | case HOT_ADD_DISK: | |
7423 | case SET_DISK_FAULTY: | |
7424 | case SET_BITMAP_FILE: | |
7425 | /* These take in integer arg, do not convert */ | |
7426 | break; | |
7427 | default: | |
7428 | arg = (unsigned long)compat_ptr(arg); | |
7429 | break; | |
7430 | } | |
7431 | ||
7432 | return md_ioctl(bdev, mode, cmd, arg); | |
7433 | } | |
7434 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7435 | |
a39907fa | 7436 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7437 | { |
7438 | /* | |
7439 | * Succeed if we can lock the mddev, which confirms that | |
7440 | * it isn't being stopped right now. | |
7441 | */ | |
fd01b88c | 7442 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7443 | int err; |
7444 | ||
0c098220 YL |
7445 | if (!mddev) |
7446 | return -ENODEV; | |
7447 | ||
d3374825 N |
7448 | if (mddev->gendisk != bdev->bd_disk) { |
7449 | /* we are racing with mddev_put which is discarding this | |
7450 | * bd_disk. | |
7451 | */ | |
7452 | mddev_put(mddev); | |
7453 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7454 | flush_workqueue(md_misc_wq); |
d3374825 N |
7455 | /* Then retry the open from the top */ |
7456 | return -ERESTARTSYS; | |
7457 | } | |
7458 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7459 | ||
c8c00a69 | 7460 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7461 | goto out; |
7462 | ||
af8d8e6f GJ |
7463 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7464 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7465 | err = -ENODEV; |
7466 | goto out; | |
af8d8e6f GJ |
7467 | } |
7468 | ||
1da177e4 | 7469 | err = 0; |
f2ea68cf | 7470 | atomic_inc(&mddev->openers); |
c8c00a69 | 7471 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7472 | |
f0b4f7e2 | 7473 | check_disk_change(bdev); |
1da177e4 | 7474 | out: |
e2342ca8 N |
7475 | if (err) |
7476 | mddev_put(mddev); | |
1da177e4 LT |
7477 | return err; |
7478 | } | |
7479 | ||
db2a144b | 7480 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7481 | { |
f72ffdd6 | 7482 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7483 | |
52e5f9d1 | 7484 | BUG_ON(!mddev); |
f2ea68cf | 7485 | atomic_dec(&mddev->openers); |
1da177e4 | 7486 | mddev_put(mddev); |
1da177e4 | 7487 | } |
f0b4f7e2 N |
7488 | |
7489 | static int md_media_changed(struct gendisk *disk) | |
7490 | { | |
fd01b88c | 7491 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7492 | |
7493 | return mddev->changed; | |
7494 | } | |
7495 | ||
7496 | static int md_revalidate(struct gendisk *disk) | |
7497 | { | |
fd01b88c | 7498 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7499 | |
7500 | mddev->changed = 0; | |
7501 | return 0; | |
7502 | } | |
83d5cde4 | 7503 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7504 | { |
7505 | .owner = THIS_MODULE, | |
a39907fa AV |
7506 | .open = md_open, |
7507 | .release = md_release, | |
b492b852 | 7508 | .ioctl = md_ioctl, |
aa98aa31 AB |
7509 | #ifdef CONFIG_COMPAT |
7510 | .compat_ioctl = md_compat_ioctl, | |
7511 | #endif | |
a885c8c4 | 7512 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7513 | .media_changed = md_media_changed, |
7514 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7515 | }; |
7516 | ||
f72ffdd6 | 7517 | static int md_thread(void *arg) |
1da177e4 | 7518 | { |
2b8bf345 | 7519 | struct md_thread *thread = arg; |
1da177e4 | 7520 | |
1da177e4 LT |
7521 | /* |
7522 | * md_thread is a 'system-thread', it's priority should be very | |
7523 | * high. We avoid resource deadlocks individually in each | |
7524 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7525 | * the very same RT priority as kswapd, thus we will never get | |
7526 | * into a priority inversion deadlock. | |
7527 | * | |
7528 | * we definitely have to have equal or higher priority than | |
7529 | * bdflush, otherwise bdflush will deadlock if there are too | |
7530 | * many dirty RAID5 blocks. | |
7531 | */ | |
1da177e4 | 7532 | |
6985c43f | 7533 | allow_signal(SIGKILL); |
a6fb0934 | 7534 | while (!kthread_should_stop()) { |
1da177e4 | 7535 | |
93588e22 N |
7536 | /* We need to wait INTERRUPTIBLE so that |
7537 | * we don't add to the load-average. | |
7538 | * That means we need to be sure no signals are | |
7539 | * pending | |
7540 | */ | |
7541 | if (signal_pending(current)) | |
7542 | flush_signals(current); | |
7543 | ||
7544 | wait_event_interruptible_timeout | |
7545 | (thread->wqueue, | |
7546 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7547 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7548 | thread->timeout); |
1da177e4 | 7549 | |
6c987910 | 7550 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7551 | if (kthread_should_park()) |
7552 | kthread_parkme(); | |
6c987910 | 7553 | if (!kthread_should_stop()) |
4ed8731d | 7554 | thread->run(thread); |
1da177e4 | 7555 | } |
a6fb0934 | 7556 | |
1da177e4 LT |
7557 | return 0; |
7558 | } | |
7559 | ||
2b8bf345 | 7560 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7561 | { |
7562 | if (thread) { | |
36a4e1fe | 7563 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7564 | set_bit(THREAD_WAKEUP, &thread->flags); |
7565 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7566 | } |
7567 | } | |
6c144d31 | 7568 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7569 | |
4ed8731d SL |
7570 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7571 | struct mddev *mddev, const char *name) | |
1da177e4 | 7572 | { |
2b8bf345 | 7573 | struct md_thread *thread; |
1da177e4 | 7574 | |
2b8bf345 | 7575 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7576 | if (!thread) |
7577 | return NULL; | |
7578 | ||
1da177e4 LT |
7579 | init_waitqueue_head(&thread->wqueue); |
7580 | ||
1da177e4 LT |
7581 | thread->run = run; |
7582 | thread->mddev = mddev; | |
32a7627c | 7583 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7584 | thread->tsk = kthread_run(md_thread, thread, |
7585 | "%s_%s", | |
7586 | mdname(thread->mddev), | |
0232605d | 7587 | name); |
a6fb0934 | 7588 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7589 | kfree(thread); |
7590 | return NULL; | |
7591 | } | |
1da177e4 LT |
7592 | return thread; |
7593 | } | |
6c144d31 | 7594 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7595 | |
2b8bf345 | 7596 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7597 | { |
2b8bf345 | 7598 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7599 | if (!thread) |
7600 | return; | |
36a4e1fe | 7601 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7602 | /* Locking ensures that mddev_unlock does not wake_up a |
7603 | * non-existent thread | |
7604 | */ | |
7605 | spin_lock(&pers_lock); | |
7606 | *threadp = NULL; | |
7607 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7608 | |
7609 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7610 | kfree(thread); |
7611 | } | |
6c144d31 | 7612 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7613 | |
fd01b88c | 7614 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7615 | { |
b2d444d7 | 7616 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7617 | return; |
6bfe0b49 | 7618 | |
de393cde | 7619 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7620 | return; |
7621 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7622 | if (mddev->degraded) |
7623 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7624 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7625 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7626 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7627 | md_wakeup_thread(mddev->thread); | |
768a418d | 7628 | if (mddev->event_work.func) |
e804ac78 | 7629 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7630 | md_new_event(mddev); |
1da177e4 | 7631 | } |
6c144d31 | 7632 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7633 | |
7634 | /* seq_file implementation /proc/mdstat */ | |
7635 | ||
7636 | static void status_unused(struct seq_file *seq) | |
7637 | { | |
7638 | int i = 0; | |
3cb03002 | 7639 | struct md_rdev *rdev; |
1da177e4 LT |
7640 | |
7641 | seq_printf(seq, "unused devices: "); | |
7642 | ||
159ec1fc | 7643 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7644 | char b[BDEVNAME_SIZE]; |
7645 | i++; | |
7646 | seq_printf(seq, "%s ", | |
7647 | bdevname(rdev->bdev,b)); | |
7648 | } | |
7649 | if (!i) | |
7650 | seq_printf(seq, "<none>"); | |
7651 | ||
7652 | seq_printf(seq, "\n"); | |
7653 | } | |
7654 | ||
f7851be7 | 7655 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7656 | { |
dd71cf6b N |
7657 | sector_t max_sectors, resync, res; |
7658 | unsigned long dt, db; | |
7659 | sector_t rt; | |
4588b42e N |
7660 | int scale; |
7661 | unsigned int per_milli; | |
1da177e4 | 7662 | |
c804cdec N |
7663 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7664 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7665 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7666 | else |
dd71cf6b | 7667 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7668 | |
f7851be7 N |
7669 | resync = mddev->curr_resync; |
7670 | if (resync <= 3) { | |
7671 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7672 | /* Still cleaning up */ | |
7673 | resync = max_sectors; | |
d2e2ec82 ND |
7674 | } else if (resync > max_sectors) |
7675 | resync = max_sectors; | |
7676 | else | |
f7851be7 N |
7677 | resync -= atomic_read(&mddev->recovery_active); |
7678 | ||
7679 | if (resync == 0) { | |
0357ba27 GJ |
7680 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
7681 | struct md_rdev *rdev; | |
7682 | ||
7683 | rdev_for_each(rdev, mddev) | |
7684 | if (rdev->raid_disk >= 0 && | |
7685 | !test_bit(Faulty, &rdev->flags) && | |
7686 | rdev->recovery_offset != MaxSector && | |
7687 | rdev->recovery_offset) { | |
7688 | seq_printf(seq, "\trecover=REMOTE"); | |
7689 | return 1; | |
7690 | } | |
7691 | if (mddev->reshape_position != MaxSector) | |
7692 | seq_printf(seq, "\treshape=REMOTE"); | |
7693 | else | |
7694 | seq_printf(seq, "\tresync=REMOTE"); | |
7695 | return 1; | |
7696 | } | |
f7851be7 N |
7697 | if (mddev->recovery_cp < MaxSector) { |
7698 | seq_printf(seq, "\tresync=PENDING"); | |
7699 | return 1; | |
7700 | } | |
7701 | return 0; | |
7702 | } | |
7703 | if (resync < 3) { | |
7704 | seq_printf(seq, "\tresync=DELAYED"); | |
7705 | return 1; | |
7706 | } | |
7707 | ||
403df478 | 7708 | WARN_ON(max_sectors == 0); |
4588b42e | 7709 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7710 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7711 | * u32, as those are the requirements for sector_div. |
7712 | * Thus 'scale' must be at least 10 | |
7713 | */ | |
7714 | scale = 10; | |
7715 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7716 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7717 | scale++; |
7718 | } | |
7719 | res = (resync>>scale)*1000; | |
dd71cf6b | 7720 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7721 | |
7722 | per_milli = res; | |
1da177e4 | 7723 | { |
4588b42e | 7724 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7725 | seq_printf(seq, "["); |
7726 | for (i = 0; i < x; i++) | |
7727 | seq_printf(seq, "="); | |
7728 | seq_printf(seq, ">"); | |
7729 | for (i = 0; i < y; i++) | |
7730 | seq_printf(seq, "."); | |
7731 | seq_printf(seq, "] "); | |
7732 | } | |
4588b42e | 7733 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7734 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7735 | "reshape" : | |
61df9d91 N |
7736 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7737 | "check" : | |
7738 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7739 | "resync" : "recovery"))), | |
7740 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7741 | (unsigned long long) resync/2, |
7742 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7743 | |
7744 | /* | |
1da177e4 LT |
7745 | * dt: time from mark until now |
7746 | * db: blocks written from mark until now | |
7747 | * rt: remaining time | |
dd71cf6b N |
7748 | * |
7749 | * rt is a sector_t, so could be 32bit or 64bit. | |
7750 | * So we divide before multiply in case it is 32bit and close | |
7751 | * to the limit. | |
25985edc | 7752 | * We scale the divisor (db) by 32 to avoid losing precision |
dd71cf6b N |
7753 | * near the end of resync when the number of remaining sectors |
7754 | * is close to 'db'. | |
7755 | * We then divide rt by 32 after multiplying by db to compensate. | |
7756 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7757 | */ |
7758 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7759 | if (!dt) dt++; | |
ff4e8d9a N |
7760 | db = (mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active)) |
7761 | - mddev->resync_mark_cnt; | |
1da177e4 | 7762 | |
dd71cf6b N |
7763 | rt = max_sectors - resync; /* number of remaining sectors */ |
7764 | sector_div(rt, db/32+1); | |
7765 | rt *= dt; | |
7766 | rt >>= 5; | |
7767 | ||
7768 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7769 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7770 | |
ff4e8d9a | 7771 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7772 | return 1; |
1da177e4 LT |
7773 | } |
7774 | ||
7775 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7776 | { | |
7777 | struct list_head *tmp; | |
7778 | loff_t l = *pos; | |
fd01b88c | 7779 | struct mddev *mddev; |
1da177e4 LT |
7780 | |
7781 | if (l >= 0x10000) | |
7782 | return NULL; | |
7783 | if (!l--) | |
7784 | /* header */ | |
7785 | return (void*)1; | |
7786 | ||
7787 | spin_lock(&all_mddevs_lock); | |
7788 | list_for_each(tmp,&all_mddevs) | |
7789 | if (!l--) { | |
fd01b88c | 7790 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7791 | mddev_get(mddev); |
7792 | spin_unlock(&all_mddevs_lock); | |
7793 | return mddev; | |
7794 | } | |
7795 | spin_unlock(&all_mddevs_lock); | |
7796 | if (!l--) | |
7797 | return (void*)2;/* tail */ | |
7798 | return NULL; | |
7799 | } | |
7800 | ||
7801 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7802 | { | |
7803 | struct list_head *tmp; | |
fd01b88c | 7804 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7805 | |
1da177e4 LT |
7806 | ++*pos; |
7807 | if (v == (void*)2) | |
7808 | return NULL; | |
7809 | ||
7810 | spin_lock(&all_mddevs_lock); | |
7811 | if (v == (void*)1) | |
7812 | tmp = all_mddevs.next; | |
7813 | else | |
7814 | tmp = mddev->all_mddevs.next; | |
7815 | if (tmp != &all_mddevs) | |
fd01b88c | 7816 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7817 | else { |
7818 | next_mddev = (void*)2; | |
7819 | *pos = 0x10000; | |
f72ffdd6 | 7820 | } |
1da177e4 LT |
7821 | spin_unlock(&all_mddevs_lock); |
7822 | ||
7823 | if (v != (void*)1) | |
7824 | mddev_put(mddev); | |
7825 | return next_mddev; | |
7826 | ||
7827 | } | |
7828 | ||
7829 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7830 | { | |
fd01b88c | 7831 | struct mddev *mddev = v; |
1da177e4 LT |
7832 | |
7833 | if (mddev && v != (void*)1 && v != (void*)2) | |
7834 | mddev_put(mddev); | |
7835 | } | |
7836 | ||
7837 | static int md_seq_show(struct seq_file *seq, void *v) | |
7838 | { | |
fd01b88c | 7839 | struct mddev *mddev = v; |
dd8ac336 | 7840 | sector_t sectors; |
3cb03002 | 7841 | struct md_rdev *rdev; |
1da177e4 LT |
7842 | |
7843 | if (v == (void*)1) { | |
84fc4b56 | 7844 | struct md_personality *pers; |
1da177e4 LT |
7845 | seq_printf(seq, "Personalities : "); |
7846 | spin_lock(&pers_lock); | |
2604b703 N |
7847 | list_for_each_entry(pers, &pers_list, list) |
7848 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7849 | |
7850 | spin_unlock(&pers_lock); | |
7851 | seq_printf(seq, "\n"); | |
f1514638 | 7852 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7853 | return 0; |
7854 | } | |
7855 | if (v == (void*)2) { | |
7856 | status_unused(seq); | |
7857 | return 0; | |
7858 | } | |
7859 | ||
36d091f4 | 7860 | spin_lock(&mddev->lock); |
1da177e4 LT |
7861 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7862 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7863 | mddev->pers ? "" : "in"); | |
7864 | if (mddev->pers) { | |
f91de92e | 7865 | if (mddev->ro==1) |
1da177e4 | 7866 | seq_printf(seq, " (read-only)"); |
f91de92e | 7867 | if (mddev->ro==2) |
52720ae7 | 7868 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7869 | seq_printf(seq, " %s", mddev->pers->name); |
7870 | } | |
7871 | ||
dd8ac336 | 7872 | sectors = 0; |
f97fcad3 N |
7873 | rcu_read_lock(); |
7874 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
7875 | char b[BDEVNAME_SIZE]; |
7876 | seq_printf(seq, " %s[%d]", | |
7877 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
7878 | if (test_bit(WriteMostly, &rdev->flags)) |
7879 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
7880 | if (test_bit(Journal, &rdev->flags)) |
7881 | seq_printf(seq, "(J)"); | |
b2d444d7 | 7882 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
7883 | seq_printf(seq, "(F)"); |
7884 | continue; | |
2d78f8c4 N |
7885 | } |
7886 | if (rdev->raid_disk < 0) | |
b325a32e | 7887 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
7888 | if (test_bit(Replacement, &rdev->flags)) |
7889 | seq_printf(seq, "(R)"); | |
dd8ac336 | 7890 | sectors += rdev->sectors; |
1da177e4 | 7891 | } |
f97fcad3 | 7892 | rcu_read_unlock(); |
1da177e4 LT |
7893 | |
7894 | if (!list_empty(&mddev->disks)) { | |
7895 | if (mddev->pers) | |
7896 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
7897 | (unsigned long long) |
7898 | mddev->array_sectors / 2); | |
1da177e4 LT |
7899 | else |
7900 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 7901 | (unsigned long long)sectors / 2); |
1da177e4 | 7902 | } |
1cd6bf19 N |
7903 | if (mddev->persistent) { |
7904 | if (mddev->major_version != 0 || | |
7905 | mddev->minor_version != 90) { | |
7906 | seq_printf(seq," super %d.%d", | |
7907 | mddev->major_version, | |
7908 | mddev->minor_version); | |
7909 | } | |
e691063a N |
7910 | } else if (mddev->external) |
7911 | seq_printf(seq, " super external:%s", | |
7912 | mddev->metadata_type); | |
7913 | else | |
1cd6bf19 | 7914 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
7915 | |
7916 | if (mddev->pers) { | |
d710e138 | 7917 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 7918 | seq_printf(seq, "\n "); |
8e1b39d6 | 7919 | if (mddev->pers->sync_request) { |
f7851be7 | 7920 | if (status_resync(seq, mddev)) |
8e1b39d6 | 7921 | seq_printf(seq, "\n "); |
8e1b39d6 | 7922 | } |
32a7627c N |
7923 | } else |
7924 | seq_printf(seq, "\n "); | |
7925 | ||
e64e4018 | 7926 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
7927 | |
7928 | seq_printf(seq, "\n"); | |
7929 | } | |
36d091f4 | 7930 | spin_unlock(&mddev->lock); |
f72ffdd6 | 7931 | |
1da177e4 LT |
7932 | return 0; |
7933 | } | |
7934 | ||
110518bc | 7935 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
7936 | .start = md_seq_start, |
7937 | .next = md_seq_next, | |
7938 | .stop = md_seq_stop, | |
7939 | .show = md_seq_show, | |
7940 | }; | |
7941 | ||
7942 | static int md_seq_open(struct inode *inode, struct file *file) | |
7943 | { | |
f1514638 | 7944 | struct seq_file *seq; |
1da177e4 LT |
7945 | int error; |
7946 | ||
7947 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 7948 | if (error) |
f1514638 KS |
7949 | return error; |
7950 | ||
7951 | seq = file->private_data; | |
7952 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
7953 | return error; |
7954 | } | |
7955 | ||
e2f23b60 | 7956 | static int md_unloading; |
afc9a42b | 7957 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 7958 | { |
f1514638 | 7959 | struct seq_file *seq = filp->private_data; |
afc9a42b | 7960 | __poll_t mask; |
d7603b7e | 7961 | |
e2f23b60 | 7962 | if (md_unloading) |
a9a08845 | 7963 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
7964 | poll_wait(filp, &md_event_waiters, wait); |
7965 | ||
7966 | /* always allow read */ | |
a9a08845 | 7967 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 7968 | |
f1514638 | 7969 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 7970 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
7971 | return mask; |
7972 | } | |
7973 | ||
fa027c2a | 7974 | static const struct file_operations md_seq_fops = { |
e24650c2 | 7975 | .owner = THIS_MODULE, |
1da177e4 LT |
7976 | .open = md_seq_open, |
7977 | .read = seq_read, | |
7978 | .llseek = seq_lseek, | |
26e13043 | 7979 | .release = seq_release, |
d7603b7e | 7980 | .poll = mdstat_poll, |
1da177e4 LT |
7981 | }; |
7982 | ||
84fc4b56 | 7983 | int register_md_personality(struct md_personality *p) |
1da177e4 | 7984 | { |
9d48739e N |
7985 | pr_debug("md: %s personality registered for level %d\n", |
7986 | p->name, p->level); | |
1da177e4 | 7987 | spin_lock(&pers_lock); |
2604b703 | 7988 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
7989 | spin_unlock(&pers_lock); |
7990 | return 0; | |
7991 | } | |
6c144d31 | 7992 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 7993 | |
84fc4b56 | 7994 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 7995 | { |
9d48739e | 7996 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 7997 | spin_lock(&pers_lock); |
2604b703 | 7998 | list_del_init(&p->list); |
1da177e4 LT |
7999 | spin_unlock(&pers_lock); |
8000 | return 0; | |
8001 | } | |
6c144d31 | 8002 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8003 | |
6022e75b N |
8004 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8005 | struct module *module) | |
edb39c9d | 8006 | { |
6022e75b | 8007 | int ret = 0; |
edb39c9d | 8008 | spin_lock(&pers_lock); |
6022e75b N |
8009 | if (md_cluster_ops != NULL) |
8010 | ret = -EALREADY; | |
8011 | else { | |
8012 | md_cluster_ops = ops; | |
8013 | md_cluster_mod = module; | |
8014 | } | |
edb39c9d | 8015 | spin_unlock(&pers_lock); |
6022e75b | 8016 | return ret; |
edb39c9d GR |
8017 | } |
8018 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8019 | ||
8020 | int unregister_md_cluster_operations(void) | |
8021 | { | |
8022 | spin_lock(&pers_lock); | |
8023 | md_cluster_ops = NULL; | |
8024 | spin_unlock(&pers_lock); | |
8025 | return 0; | |
8026 | } | |
8027 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8028 | ||
8029 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8030 | { | |
47a7b0d8 GJ |
8031 | if (!md_cluster_ops) |
8032 | request_module("md-cluster"); | |
edb39c9d | 8033 | spin_lock(&pers_lock); |
47a7b0d8 | 8034 | /* ensure module won't be unloaded */ |
edb39c9d | 8035 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8036 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8037 | spin_unlock(&pers_lock); |
8038 | return -ENOENT; | |
8039 | } | |
8040 | spin_unlock(&pers_lock); | |
8041 | ||
cf921cc1 | 8042 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
8043 | } |
8044 | ||
8045 | void md_cluster_stop(struct mddev *mddev) | |
8046 | { | |
c4ce867f GR |
8047 | if (!md_cluster_ops) |
8048 | return; | |
edb39c9d GR |
8049 | md_cluster_ops->leave(mddev); |
8050 | module_put(md_cluster_mod); | |
8051 | } | |
8052 | ||
fd01b88c | 8053 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8054 | { |
f72ffdd6 | 8055 | struct md_rdev *rdev; |
1da177e4 | 8056 | int idle; |
eea1bf38 | 8057 | int curr_events; |
1da177e4 LT |
8058 | |
8059 | idle = 1; | |
4b80991c N |
8060 | rcu_read_lock(); |
8061 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8062 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
59767fbd | 8063 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8064 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8065 | /* sync IO will cause sync_io to increase before the disk_stats |
8066 | * as sync_io is counted when a request starts, and | |
8067 | * disk_stats is counted when it completes. | |
8068 | * So resync activity will cause curr_events to be smaller than | |
8069 | * when there was no such activity. | |
8070 | * non-sync IO will cause disk_stat to increase without | |
8071 | * increasing sync_io so curr_events will (eventually) | |
8072 | * be larger than it was before. Once it becomes | |
8073 | * substantially larger, the test below will cause | |
8074 | * the array to appear non-idle, and resync will slow | |
8075 | * down. | |
8076 | * If there is a lot of outstanding resync activity when | |
8077 | * we set last_event to curr_events, then all that activity | |
8078 | * completing might cause the array to appear non-idle | |
8079 | * and resync will be slowed down even though there might | |
8080 | * not have been non-resync activity. This will only | |
8081 | * happen once though. 'last_events' will soon reflect | |
8082 | * the state where there is little or no outstanding | |
8083 | * resync requests, and further resync activity will | |
8084 | * always make curr_events less than last_events. | |
c0e48521 | 8085 | * |
1da177e4 | 8086 | */ |
eea1bf38 | 8087 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8088 | rdev->last_events = curr_events; |
8089 | idle = 0; | |
8090 | } | |
8091 | } | |
4b80991c | 8092 | rcu_read_unlock(); |
1da177e4 LT |
8093 | return idle; |
8094 | } | |
8095 | ||
fd01b88c | 8096 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8097 | { |
8098 | /* another "blocks" (512byte) blocks have been synced */ | |
8099 | atomic_sub(blocks, &mddev->recovery_active); | |
8100 | wake_up(&mddev->recovery_wait); | |
8101 | if (!ok) { | |
dfc70645 | 8102 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8103 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8104 | md_wakeup_thread(mddev->thread); |
8105 | // stop recovery, signal do_sync .... | |
8106 | } | |
8107 | } | |
6c144d31 | 8108 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8109 | |
06d91a5f N |
8110 | /* md_write_start(mddev, bi) |
8111 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8112 | * in superblock) before writing, schedule a superblock update |
8113 | * and wait for it to complete. | |
cc27b0c7 N |
8114 | * A return value of 'false' means that the write wasn't recorded |
8115 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8116 | */ |
cc27b0c7 | 8117 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8118 | { |
0fd62b86 | 8119 | int did_change = 0; |
4b6c1060 | 8120 | |
06d91a5f | 8121 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8122 | return true; |
06d91a5f | 8123 | |
f91de92e N |
8124 | BUG_ON(mddev->ro == 1); |
8125 | if (mddev->ro == 2) { | |
8126 | /* need to switch to read/write */ | |
8127 | mddev->ro = 0; | |
8128 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8129 | md_wakeup_thread(mddev->thread); | |
25156198 | 8130 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8131 | did_change = 1; |
f91de92e | 8132 | } |
4ad23a97 N |
8133 | rcu_read_lock(); |
8134 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8135 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8136 | if (mddev->safemode == 1) |
8137 | mddev->safemode = 0; | |
4ad23a97 | 8138 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8139 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8140 | spin_lock(&mddev->lock); |
3d310eb7 N |
8141 | if (mddev->in_sync) { |
8142 | mddev->in_sync = 0; | |
2953079c SL |
8143 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8144 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8145 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8146 | did_change = 1; |
3d310eb7 | 8147 | } |
85572d7c | 8148 | spin_unlock(&mddev->lock); |
06d91a5f | 8149 | } |
4ad23a97 | 8150 | rcu_read_unlock(); |
0fd62b86 | 8151 | if (did_change) |
00bcb4ac | 8152 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8153 | if (!mddev->has_superblocks) |
8154 | return true; | |
09a44cc1 | 8155 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8156 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8157 | mddev->suspended); | |
cc27b0c7 N |
8158 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8159 | percpu_ref_put(&mddev->writes_pending); | |
8160 | return false; | |
8161 | } | |
8162 | return true; | |
1da177e4 | 8163 | } |
6c144d31 | 8164 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8165 | |
49728050 N |
8166 | /* md_write_inc can only be called when md_write_start() has |
8167 | * already been called at least once of the current request. | |
8168 | * It increments the counter and is useful when a single request | |
8169 | * is split into several parts. Each part causes an increment and | |
8170 | * so needs a matching md_write_end(). | |
8171 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8172 | * a spinlocked region. | |
8173 | */ | |
8174 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8175 | { | |
8176 | if (bio_data_dir(bi) != WRITE) | |
8177 | return; | |
8178 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8179 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8180 | } |
8181 | EXPORT_SYMBOL(md_write_inc); | |
8182 | ||
fd01b88c | 8183 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8184 | { |
4ad23a97 N |
8185 | percpu_ref_put(&mddev->writes_pending); |
8186 | ||
8187 | if (mddev->safemode == 2) | |
8188 | md_wakeup_thread(mddev->thread); | |
8189 | else if (mddev->safemode_delay) | |
8190 | /* The roundup() ensures this only performs locking once | |
8191 | * every ->safemode_delay jiffies | |
8192 | */ | |
8193 | mod_timer(&mddev->safemode_timer, | |
8194 | roundup(jiffies, mddev->safemode_delay) + | |
8195 | mddev->safemode_delay); | |
1da177e4 | 8196 | } |
4ad23a97 | 8197 | |
6c144d31 | 8198 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8199 | |
2a2275d6 N |
8200 | /* md_allow_write(mddev) |
8201 | * Calling this ensures that the array is marked 'active' so that writes | |
8202 | * may proceed without blocking. It is important to call this before | |
8203 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8204 | * Must be called with mddev_lock held. | |
8205 | */ | |
2214c260 | 8206 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8207 | { |
8208 | if (!mddev->pers) | |
2214c260 | 8209 | return; |
2a2275d6 | 8210 | if (mddev->ro) |
2214c260 | 8211 | return; |
1a0fd497 | 8212 | if (!mddev->pers->sync_request) |
2214c260 | 8213 | return; |
2a2275d6 | 8214 | |
85572d7c | 8215 | spin_lock(&mddev->lock); |
2a2275d6 N |
8216 | if (mddev->in_sync) { |
8217 | mddev->in_sync = 0; | |
2953079c SL |
8218 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8219 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8220 | if (mddev->safemode_delay && |
8221 | mddev->safemode == 0) | |
8222 | mddev->safemode = 1; | |
85572d7c | 8223 | spin_unlock(&mddev->lock); |
2a2275d6 | 8224 | md_update_sb(mddev, 0); |
00bcb4ac | 8225 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8226 | /* wait for the dirty state to be recorded in the metadata */ |
8227 | wait_event(mddev->sb_wait, | |
2214c260 | 8228 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8229 | } else |
85572d7c | 8230 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8231 | } |
8232 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8233 | ||
1da177e4 LT |
8234 | #define SYNC_MARKS 10 |
8235 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8236 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8237 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8238 | { |
4ed8731d | 8239 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8240 | struct mddev *mddev2; |
1da177e4 LT |
8241 | unsigned int currspeed = 0, |
8242 | window; | |
ac7e50a3 | 8243 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8244 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8245 | unsigned long update_time; |
1da177e4 LT |
8246 | sector_t mark_cnt[SYNC_MARKS]; |
8247 | int last_mark,m; | |
8248 | struct list_head *tmp; | |
8249 | sector_t last_check; | |
57afd89f | 8250 | int skipped = 0; |
3cb03002 | 8251 | struct md_rdev *rdev; |
c4a39551 | 8252 | char *desc, *action = NULL; |
7c2c57c9 | 8253 | struct blk_plug plug; |
41a9a0dc | 8254 | int ret; |
1da177e4 LT |
8255 | |
8256 | /* just incase thread restarts... */ | |
d5d885fd SL |
8257 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8258 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8259 | return; |
3991b31e N |
8260 | if (mddev->ro) {/* never try to sync a read-only array */ |
8261 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8262 | return; |
3991b31e | 8263 | } |
1da177e4 | 8264 | |
41a9a0dc GJ |
8265 | if (mddev_is_clustered(mddev)) { |
8266 | ret = md_cluster_ops->resync_start(mddev); | |
8267 | if (ret) | |
8268 | goto skip; | |
8269 | ||
bb8bf15b | 8270 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8271 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8272 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8273 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8274 | && ((unsigned long long)mddev->curr_resync_completed | |
8275 | < (unsigned long long)mddev->resync_max_sectors)) | |
8276 | goto skip; | |
8277 | } | |
8278 | ||
61df9d91 | 8279 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8280 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8281 | desc = "data-check"; |
c4a39551 JB |
8282 | action = "check"; |
8283 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8284 | desc = "requested-resync"; |
c4a39551 JB |
8285 | action = "repair"; |
8286 | } else | |
61df9d91 N |
8287 | desc = "resync"; |
8288 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8289 | desc = "reshape"; | |
8290 | else | |
8291 | desc = "recovery"; | |
8292 | ||
c4a39551 JB |
8293 | mddev->last_sync_action = action ?: desc; |
8294 | ||
1da177e4 LT |
8295 | /* we overload curr_resync somewhat here. |
8296 | * 0 == not engaged in resync at all | |
8297 | * 2 == checking that there is no conflict with another sync | |
8298 | * 1 == like 2, but have yielded to allow conflicting resync to | |
8299 | * commense | |
8300 | * other == active in resync - this many blocks | |
8301 | * | |
8302 | * Before starting a resync we must have set curr_resync to | |
8303 | * 2, and then checked that every "conflicting" array has curr_resync | |
8304 | * less than ours. When we find one that is the same or higher | |
8305 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8306 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8307 | * This will mean we have to start checking from the beginning again. | |
8308 | * | |
8309 | */ | |
8310 | ||
8311 | do { | |
c622ca54 | 8312 | int mddev2_minor = -1; |
1da177e4 LT |
8313 | mddev->curr_resync = 2; |
8314 | ||
8315 | try_again: | |
404e4b43 | 8316 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8317 | goto skip; |
29ac4aa3 | 8318 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8319 | if (mddev2 == mddev) |
8320 | continue; | |
90b08710 BS |
8321 | if (!mddev->parallel_resync |
8322 | && mddev2->curr_resync | |
8323 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8324 | DEFINE_WAIT(wq); |
8325 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8326 | /* arbitrarily yield */ | |
8327 | mddev->curr_resync = 1; | |
8328 | wake_up(&resync_wait); | |
8329 | } | |
8330 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8331 | /* no need to wait here, we can wait the next | |
8332 | * time 'round when curr_resync == 2 | |
8333 | */ | |
8334 | continue; | |
9744197c N |
8335 | /* We need to wait 'interruptible' so as not to |
8336 | * contribute to the load average, and not to | |
8337 | * be caught by 'softlockup' | |
8338 | */ | |
8339 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8340 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8341 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8342 | if (mddev2_minor != mddev2->md_minor) { |
8343 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8344 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8345 | desc, mdname(mddev), | |
8346 | mdname(mddev2)); | |
c622ca54 | 8347 | } |
1da177e4 | 8348 | mddev_put(mddev2); |
9744197c N |
8349 | if (signal_pending(current)) |
8350 | flush_signals(current); | |
1da177e4 LT |
8351 | schedule(); |
8352 | finish_wait(&resync_wait, &wq); | |
8353 | goto try_again; | |
8354 | } | |
8355 | finish_wait(&resync_wait, &wq); | |
8356 | } | |
8357 | } | |
8358 | } while (mddev->curr_resync < 2); | |
8359 | ||
5fd6c1dc | 8360 | j = 0; |
9d88883e | 8361 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8362 | /* resync follows the size requested by the personality, |
57afd89f | 8363 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8364 | */ |
8365 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8366 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8367 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8368 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8369 | j = mddev->resync_min; | |
8370 | else if (!mddev->bitmap) | |
5fd6c1dc | 8371 | j = mddev->recovery_cp; |
5e96ee65 | 8372 | |
ccfcc3c1 | 8373 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) |
c804cdec | 8374 | max_sectors = mddev->resync_max_sectors; |
5fd6c1dc | 8375 | else { |
1da177e4 | 8376 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8377 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8378 | j = MaxSector; |
4e59ca7d | 8379 | rcu_read_lock(); |
dafb20fa | 8380 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8381 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8382 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8383 | !test_bit(Faulty, &rdev->flags) && |
8384 | !test_bit(In_sync, &rdev->flags) && | |
8385 | rdev->recovery_offset < j) | |
8386 | j = rdev->recovery_offset; | |
4e59ca7d | 8387 | rcu_read_unlock(); |
133d4527 N |
8388 | |
8389 | /* If there is a bitmap, we need to make sure all | |
8390 | * writes that started before we added a spare | |
8391 | * complete before we start doing a recovery. | |
8392 | * Otherwise the write might complete and (via | |
8393 | * bitmap_endwrite) set a bit in the bitmap after the | |
8394 | * recovery has checked that bit and skipped that | |
8395 | * region. | |
8396 | */ | |
8397 | if (mddev->bitmap) { | |
8398 | mddev->pers->quiesce(mddev, 1); | |
8399 | mddev->pers->quiesce(mddev, 0); | |
8400 | } | |
5fd6c1dc | 8401 | } |
1da177e4 | 8402 | |
9d48739e N |
8403 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8404 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8405 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8406 | speed_max(mddev), desc); | |
1da177e4 | 8407 | |
eea1bf38 | 8408 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8409 | |
57afd89f | 8410 | io_sectors = 0; |
1da177e4 LT |
8411 | for (m = 0; m < SYNC_MARKS; m++) { |
8412 | mark[m] = jiffies; | |
57afd89f | 8413 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8414 | } |
8415 | last_mark = 0; | |
8416 | mddev->resync_mark = mark[last_mark]; | |
8417 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8418 | ||
8419 | /* | |
8420 | * Tune reconstruction: | |
8421 | */ | |
8422 | window = 32*(PAGE_SIZE/512); | |
9d48739e N |
8423 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8424 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8425 | |
8426 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8427 | last_check = 0; |
8428 | ||
8429 | if (j>2) { | |
9d48739e N |
8430 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8431 | desc, mdname(mddev)); | |
1da177e4 | 8432 | mddev->curr_resync = j; |
72f36d59 N |
8433 | } else |
8434 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8435 | mddev->curr_resync_completed = j; |
72f36d59 N |
8436 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8437 | md_new_event(mddev); | |
54f89341 | 8438 | update_time = jiffies; |
1da177e4 | 8439 | |
7c2c57c9 | 8440 | blk_start_plug(&plug); |
1da177e4 | 8441 | while (j < max_sectors) { |
57afd89f | 8442 | sector_t sectors; |
1da177e4 | 8443 | |
57afd89f | 8444 | skipped = 0; |
97e4f42d | 8445 | |
7a91ee1f N |
8446 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8447 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8448 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8449 | > (max_sectors >> 4)) || | |
54f89341 | 8450 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8451 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8452 | >= mddev->resync_max - mddev->curr_resync_completed || |
8453 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8454 | )) { |
97e4f42d | 8455 | /* time to update curr_resync_completed */ |
97e4f42d N |
8456 | wait_event(mddev->recovery_wait, |
8457 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8458 | mddev->curr_resync_completed = j; |
35d78c66 | 8459 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8460 | j > mddev->recovery_cp) | |
8461 | mddev->recovery_cp = j; | |
54f89341 | 8462 | update_time = jiffies; |
2953079c | 8463 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8464 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8465 | } |
acb180b0 | 8466 | |
c91abf5a N |
8467 | while (j >= mddev->resync_max && |
8468 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8469 | /* As this condition is controlled by user-space, |
8470 | * we can block indefinitely, so use '_interruptible' | |
8471 | * to avoid triggering warnings. | |
8472 | */ | |
8473 | flush_signals(current); /* just in case */ | |
8474 | wait_event_interruptible(mddev->recovery_wait, | |
8475 | mddev->resync_max > j | |
c91abf5a N |
8476 | || test_bit(MD_RECOVERY_INTR, |
8477 | &mddev->recovery)); | |
e62e58a5 | 8478 | } |
acb180b0 | 8479 | |
c91abf5a N |
8480 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8481 | break; | |
acb180b0 | 8482 | |
09314799 | 8483 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8484 | if (sectors == 0) { |
dfc70645 | 8485 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8486 | break; |
1da177e4 | 8487 | } |
57afd89f N |
8488 | |
8489 | if (!skipped) { /* actual IO requested */ | |
8490 | io_sectors += sectors; | |
8491 | atomic_add(sectors, &mddev->recovery_active); | |
8492 | } | |
8493 | ||
e875ecea N |
8494 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8495 | break; | |
8496 | ||
1da177e4 | 8497 | j += sectors; |
5ed1df2e N |
8498 | if (j > max_sectors) |
8499 | /* when skipping, extra large numbers can be returned. */ | |
8500 | j = max_sectors; | |
72f36d59 N |
8501 | if (j > 2) |
8502 | mddev->curr_resync = j; | |
ff4e8d9a | 8503 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8504 | if (last_check == 0) |
e875ecea | 8505 | /* this is the earliest that rebuild will be |
d7603b7e N |
8506 | * visible in /proc/mdstat |
8507 | */ | |
8508 | md_new_event(mddev); | |
57afd89f N |
8509 | |
8510 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8511 | continue; |
8512 | ||
57afd89f | 8513 | last_check = io_sectors; |
1da177e4 LT |
8514 | repeat: |
8515 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8516 | /* step marks */ | |
8517 | int next = (last_mark+1) % SYNC_MARKS; | |
8518 | ||
8519 | mddev->resync_mark = mark[next]; | |
8520 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8521 | mark[next] = jiffies; | |
57afd89f | 8522 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8523 | last_mark = next; |
8524 | } | |
8525 | ||
c91abf5a N |
8526 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8527 | break; | |
1da177e4 LT |
8528 | |
8529 | /* | |
8530 | * this loop exits only if either when we are slower than | |
8531 | * the 'hard' speed limit, or the system was IO-idle for | |
8532 | * a jiffy. | |
8533 | * the system might be non-idle CPU-wise, but we only care | |
8534 | * about not overloading the IO subsystem. (things like an | |
8535 | * e2fsck being done on the RAID array should execute fast) | |
8536 | */ | |
1da177e4 LT |
8537 | cond_resched(); |
8538 | ||
ac7e50a3 XN |
8539 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8540 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8541 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8542 | |
88202a0c | 8543 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8544 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8545 | msleep(500); |
1da177e4 LT |
8546 | goto repeat; |
8547 | } | |
ac8fa419 N |
8548 | if (!is_mddev_idle(mddev, 0)) { |
8549 | /* | |
8550 | * Give other IO more of a chance. | |
8551 | * The faster the devices, the less we wait. | |
8552 | */ | |
8553 | wait_event(mddev->recovery_wait, | |
8554 | !atomic_read(&mddev->recovery_active)); | |
8555 | } | |
1da177e4 LT |
8556 | } |
8557 | } | |
9d48739e N |
8558 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8559 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8560 | ? "interrupted" : "done"); | |
1da177e4 LT |
8561 | /* |
8562 | * this also signals 'finished resyncing' to md_stop | |
8563 | */ | |
7c2c57c9 | 8564 | blk_finish_plug(&plug); |
1da177e4 LT |
8565 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8566 | ||
5ed1df2e N |
8567 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8568 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8569 | mddev->curr_resync > 3) { |
5ed1df2e N |
8570 | mddev->curr_resync_completed = mddev->curr_resync; |
8571 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8572 | } | |
09314799 | 8573 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8574 | |
dfc70645 | 8575 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8576 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8577 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8578 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8579 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8580 | pr_debug("md: checkpointing %s of %s.\n", |
8581 | desc, mdname(mddev)); | |
0a19caab | 8582 | if (test_bit(MD_RECOVERY_ERROR, |
8583 | &mddev->recovery)) | |
8584 | mddev->recovery_cp = | |
8585 | mddev->curr_resync_completed; | |
8586 | else | |
8587 | mddev->recovery_cp = | |
8588 | mddev->curr_resync; | |
5fd6c1dc N |
8589 | } |
8590 | } else | |
8591 | mddev->recovery_cp = MaxSector; | |
8592 | } else { | |
8593 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8594 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8595 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8596 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8597 | rcu_read_lock(); | |
8598 | rdev_for_each_rcu(rdev, mddev) | |
8599 | if (rdev->raid_disk >= 0 && | |
8600 | mddev->delta_disks >= 0 && | |
8601 | !test_bit(Journal, &rdev->flags) && | |
8602 | !test_bit(Faulty, &rdev->flags) && | |
8603 | !test_bit(In_sync, &rdev->flags) && | |
8604 | rdev->recovery_offset < mddev->curr_resync) | |
8605 | rdev->recovery_offset = mddev->curr_resync; | |
8606 | rcu_read_unlock(); | |
8607 | } | |
5fd6c1dc | 8608 | } |
1da177e4 | 8609 | } |
db91ff55 | 8610 | skip: |
bb8bf15b GJ |
8611 | /* set CHANGE_PENDING here since maybe another update is needed, |
8612 | * so other nodes are informed. It should be harmless for normal | |
8613 | * raid */ | |
2953079c SL |
8614 | set_mask_bits(&mddev->sb_flags, 0, |
8615 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8616 | |
8876391e BC |
8617 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8618 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8619 | mddev->delta_disks > 0 && | |
8620 | mddev->pers->finish_reshape && | |
8621 | mddev->pers->size && | |
8622 | mddev->queue) { | |
8623 | mddev_lock_nointr(mddev); | |
8624 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
8625 | mddev_unlock(mddev); | |
aefb2e5f GJ |
8626 | if (!mddev_is_clustered(mddev)) { |
8627 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
8628 | revalidate_disk(mddev->gendisk); | |
8629 | } | |
8876391e BC |
8630 | } |
8631 | ||
23da422b | 8632 | spin_lock(&mddev->lock); |
c07b70ad N |
8633 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8634 | /* We completed so min/max setting can be forgotten if used. */ | |
8635 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8636 | mddev->resync_min = 0; | |
8637 | mddev->resync_max = MaxSector; | |
8638 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8639 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8640 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8641 | mddev->curr_resync = 0; |
23da422b N |
8642 | spin_unlock(&mddev->lock); |
8643 | ||
1da177e4 | 8644 | wake_up(&resync_wait); |
1da177e4 | 8645 | md_wakeup_thread(mddev->thread); |
c6207277 | 8646 | return; |
1da177e4 | 8647 | } |
29269553 | 8648 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8649 | |
746d3207 N |
8650 | static int remove_and_add_spares(struct mddev *mddev, |
8651 | struct md_rdev *this) | |
b4c4c7b8 | 8652 | { |
3cb03002 | 8653 | struct md_rdev *rdev; |
b4c4c7b8 | 8654 | int spares = 0; |
f2a371c5 | 8655 | int removed = 0; |
d787be40 | 8656 | bool remove_some = false; |
b4c4c7b8 | 8657 | |
39772f0a N |
8658 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
8659 | /* Mustn't remove devices when resync thread is running */ | |
8660 | return 0; | |
8661 | ||
d787be40 N |
8662 | rdev_for_each(rdev, mddev) { |
8663 | if ((this == NULL || rdev == this) && | |
8664 | rdev->raid_disk >= 0 && | |
8665 | !test_bit(Blocked, &rdev->flags) && | |
8666 | test_bit(Faulty, &rdev->flags) && | |
8667 | atomic_read(&rdev->nr_pending)==0) { | |
8668 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8669 | * never get nr_pending incremented, | |
8670 | * never get Faulty cleared, and never get Blocked set. | |
8671 | * So we can synchronize_rcu now rather than once per device | |
8672 | */ | |
8673 | remove_some = true; | |
8674 | set_bit(RemoveSynchronized, &rdev->flags); | |
8675 | } | |
8676 | } | |
8677 | ||
8678 | if (remove_some) | |
8679 | synchronize_rcu(); | |
8680 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8681 | if ((this == NULL || rdev == this) && |
8682 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8683 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8684 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8685 | (!test_bit(In_sync, &rdev->flags) && |
8686 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8687 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8688 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8689 | mddev, rdev) == 0) { |
36fad858 | 8690 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 8691 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 8692 | rdev->raid_disk = -1; |
f2a371c5 | 8693 | removed++; |
b4c4c7b8 N |
8694 | } |
8695 | } | |
d787be40 N |
8696 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8697 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8698 | } | |
8699 | ||
90584fc9 JB |
8700 | if (removed && mddev->kobj.sd) |
8701 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8702 | |
2910ff17 | 8703 | if (this && removed) |
746d3207 N |
8704 | goto no_add; |
8705 | ||
dafb20fa | 8706 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8707 | if (this && this != rdev) |
8708 | continue; | |
dbb64f86 GR |
8709 | if (test_bit(Candidate, &rdev->flags)) |
8710 | continue; | |
7bfec5f3 N |
8711 | if (rdev->raid_disk >= 0 && |
8712 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8713 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8714 | !test_bit(Faulty, &rdev->flags)) |
8715 | spares++; | |
7ceb17e8 N |
8716 | if (rdev->raid_disk >= 0) |
8717 | continue; | |
8718 | if (test_bit(Faulty, &rdev->flags)) | |
8719 | continue; | |
f6b6ec5c SL |
8720 | if (!test_bit(Journal, &rdev->flags)) { |
8721 | if (mddev->ro && | |
8722 | ! (rdev->saved_raid_disk >= 0 && | |
8723 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8724 | continue; | |
7ceb17e8 | 8725 | |
f6b6ec5c SL |
8726 | rdev->recovery_offset = 0; |
8727 | } | |
7ceb17e8 N |
8728 | if (mddev->pers-> |
8729 | hot_add_disk(mddev, rdev) == 0) { | |
8730 | if (sysfs_link_rdev(mddev, rdev)) | |
8731 | /* failure here is OK */; | |
f6b6ec5c SL |
8732 | if (!test_bit(Journal, &rdev->flags)) |
8733 | spares++; | |
7ceb17e8 | 8734 | md_new_event(mddev); |
2953079c | 8735 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8736 | } |
b4c4c7b8 | 8737 | } |
746d3207 | 8738 | no_add: |
6dafab6b | 8739 | if (removed) |
2953079c | 8740 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8741 | return spares; |
8742 | } | |
7ebc0be7 | 8743 | |
ac05f256 N |
8744 | static void md_start_sync(struct work_struct *ws) |
8745 | { | |
8746 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8747 | |
ac05f256 N |
8748 | mddev->sync_thread = md_register_thread(md_do_sync, |
8749 | mddev, | |
8750 | "resync"); | |
8751 | if (!mddev->sync_thread) { | |
9d48739e N |
8752 | pr_warn("%s: could not start resync thread...\n", |
8753 | mdname(mddev)); | |
ac05f256 N |
8754 | /* leave the spares where they are, it shouldn't hurt */ |
8755 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8756 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8757 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8758 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8759 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8760 | wake_up(&resync_wait); |
ac05f256 N |
8761 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8762 | &mddev->recovery)) | |
8763 | if (mddev->sysfs_action) | |
8764 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8765 | } else | |
8766 | md_wakeup_thread(mddev->sync_thread); | |
8767 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8768 | md_new_event(mddev); | |
8769 | } | |
8770 | ||
1da177e4 LT |
8771 | /* |
8772 | * This routine is regularly called by all per-raid-array threads to | |
8773 | * deal with generic issues like resync and super-block update. | |
8774 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8775 | * need this as they never do any recovery or update the superblock. | |
8776 | * | |
8777 | * It does not do any resync itself, but rather "forks" off other threads | |
8778 | * to do that as needed. | |
8779 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8780 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8781 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8782 | * and wakeups up this thread which will reap the thread and finish up. |
8783 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8784 | * | |
8785 | * The overall approach is: | |
8786 | * 1/ if the superblock needs updating, update it. | |
8787 | * 2/ If a recovery thread is running, don't do anything else. | |
8788 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8789 | * 4/ If there are any faulty devices, remove them. | |
8790 | * 5/ If array is degraded, try to add spares devices | |
8791 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8792 | */ | |
fd01b88c | 8793 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8794 | { |
059421e0 N |
8795 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
8796 | /* Write superblock - thread that called mddev_suspend() | |
8797 | * holds reconfig_mutex for us. | |
8798 | */ | |
8799 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
8800 | smp_mb__after_atomic(); | |
8801 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
8802 | md_update_sb(mddev, 0); | |
8803 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
8804 | wake_up(&mddev->sb_wait); | |
8805 | } | |
8806 | ||
68866e42 JB |
8807 | if (mddev->suspended) |
8808 | return; | |
8809 | ||
5f40402d | 8810 | if (mddev->bitmap) |
e64e4018 | 8811 | md_bitmap_daemon_work(mddev); |
1da177e4 | 8812 | |
fca4d848 | 8813 | if (signal_pending(current)) { |
31a59e34 | 8814 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8815 | pr_debug("md: %s in immediate safe mode\n", |
8816 | mdname(mddev)); | |
fca4d848 N |
8817 | mddev->safemode = 2; |
8818 | } | |
8819 | flush_signals(current); | |
8820 | } | |
8821 | ||
c89a8eee N |
8822 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8823 | return; | |
1da177e4 | 8824 | if ( ! ( |
2953079c | 8825 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8826 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8827 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 8828 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 8829 | (mddev->safemode == 2 |
fca4d848 | 8830 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
8831 | )) |
8832 | return; | |
fca4d848 | 8833 | |
df5b89b3 | 8834 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8835 | int spares = 0; |
fca4d848 | 8836 | |
afc1f55c | 8837 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
8838 | mddev->safemode = 0; |
8839 | ||
c89a8eee | 8840 | if (mddev->ro) { |
ab16bfc7 NB |
8841 | struct md_rdev *rdev; |
8842 | if (!mddev->external && mddev->in_sync) | |
8843 | /* 'Blocked' flag not needed as failed devices | |
8844 | * will be recorded if array switched to read/write. | |
8845 | * Leaving it set will prevent the device | |
8846 | * from being removed. | |
8847 | */ | |
8848 | rdev_for_each(rdev, mddev) | |
8849 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8850 | /* On a read-only array we can: |
8851 | * - remove failed devices | |
8852 | * - add already-in_sync devices if the array itself | |
8853 | * is in-sync. | |
8854 | * As we only add devices that are already in-sync, | |
8855 | * we can activate the spares immediately. | |
c89a8eee | 8856 | */ |
7ceb17e8 | 8857 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8858 | /* There is no thread, but we need to call |
8859 | * ->spare_active and clear saved_raid_disk | |
8860 | */ | |
2ac295a5 | 8861 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8862 | md_reap_sync_thread(mddev); |
a4a3d26d | 8863 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 8864 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 8865 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
8866 | goto unlock; |
8867 | } | |
8868 | ||
659b254f GJ |
8869 | if (mddev_is_clustered(mddev)) { |
8870 | struct md_rdev *rdev; | |
8871 | /* kick the device if another node issued a | |
8872 | * remove disk. | |
8873 | */ | |
8874 | rdev_for_each(rdev, mddev) { | |
8875 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
8876 | rdev->raid_disk < 0) | |
8877 | md_kick_rdev_from_array(rdev); | |
8878 | } | |
8879 | } | |
8880 | ||
6497709b | 8881 | if (!mddev->external && !mddev->in_sync) { |
85572d7c | 8882 | spin_lock(&mddev->lock); |
6497709b | 8883 | set_in_sync(mddev); |
85572d7c | 8884 | spin_unlock(&mddev->lock); |
fca4d848 | 8885 | } |
fca4d848 | 8886 | |
2953079c | 8887 | if (mddev->sb_flags) |
850b2b42 | 8888 | md_update_sb(mddev, 0); |
06d91a5f | 8889 | |
1da177e4 LT |
8890 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
8891 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
8892 | /* resync/recovery still happening */ | |
8893 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8894 | goto unlock; | |
8895 | } | |
8896 | if (mddev->sync_thread) { | |
a91d5ac0 | 8897 | md_reap_sync_thread(mddev); |
1da177e4 LT |
8898 | goto unlock; |
8899 | } | |
72a23c21 NB |
8900 | /* Set RUNNING before clearing NEEDED to avoid |
8901 | * any transients in the value of "sync_action". | |
8902 | */ | |
72f36d59 | 8903 | mddev->curr_resync_completed = 0; |
23da422b | 8904 | spin_lock(&mddev->lock); |
72a23c21 | 8905 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 8906 | spin_unlock(&mddev->lock); |
24dd469d N |
8907 | /* Clear some bits that don't mean anything, but |
8908 | * might be left set | |
8909 | */ | |
24dd469d N |
8910 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8911 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 8912 | |
ed209584 N |
8913 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
8914 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 8915 | goto not_running; |
1da177e4 LT |
8916 | /* no recovery is running. |
8917 | * remove any failed drives, then | |
8918 | * add spares if possible. | |
72f36d59 | 8919 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
8920 | * the personality to fail the re-add. |
8921 | */ | |
1da177e4 | 8922 | |
b4c4c7b8 | 8923 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
8924 | if (mddev->pers->check_reshape == NULL || |
8925 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 8926 | /* Cannot proceed */ |
ac05f256 | 8927 | goto not_running; |
b4c4c7b8 | 8928 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 8929 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 8930 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
8931 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
8932 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 8933 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 8934 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8935 | } else if (mddev->recovery_cp < MaxSector) { |
8936 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 8937 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
8938 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
8939 | /* nothing to be done ... */ | |
ac05f256 | 8940 | goto not_running; |
24dd469d | 8941 | |
1da177e4 | 8942 | if (mddev->pers->sync_request) { |
ef99bf48 | 8943 | if (spares) { |
a654b9d8 N |
8944 | /* We are adding a device or devices to an array |
8945 | * which has the bitmap stored on all devices. | |
8946 | * So make sure all bitmap pages get written | |
8947 | */ | |
e64e4018 | 8948 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 8949 | } |
ac05f256 N |
8950 | INIT_WORK(&mddev->del_work, md_start_sync); |
8951 | queue_work(md_misc_wq, &mddev->del_work); | |
8952 | goto unlock; | |
1da177e4 | 8953 | } |
ac05f256 | 8954 | not_running: |
72a23c21 NB |
8955 | if (!mddev->sync_thread) { |
8956 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8957 | wake_up(&resync_wait); |
72a23c21 NB |
8958 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8959 | &mddev->recovery)) | |
0c3573f1 | 8960 | if (mddev->sysfs_action) |
00bcb4ac | 8961 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 8962 | } |
ac05f256 N |
8963 | unlock: |
8964 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
8965 | mddev_unlock(mddev); |
8966 | } | |
8967 | } | |
6c144d31 | 8968 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 8969 | |
a91d5ac0 JB |
8970 | void md_reap_sync_thread(struct mddev *mddev) |
8971 | { | |
8972 | struct md_rdev *rdev; | |
aefb2e5f GJ |
8973 | sector_t old_dev_sectors = mddev->dev_sectors; |
8974 | bool is_reshaped = false; | |
a91d5ac0 JB |
8975 | |
8976 | /* resync has finished, collect result */ | |
8977 | md_unregister_thread(&mddev->sync_thread); | |
8978 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8979 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
8980 | /* success...*/ | |
8981 | /* activate any spares */ | |
8982 | if (mddev->pers->spare_active(mddev)) { | |
8983 | sysfs_notify(&mddev->kobj, NULL, | |
8984 | "degraded"); | |
2953079c | 8985 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
8986 | } |
8987 | } | |
8988 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 8989 | mddev->pers->finish_reshape) { |
a91d5ac0 | 8990 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
8991 | if (mddev_is_clustered(mddev)) |
8992 | is_reshaped = true; | |
8993 | } | |
a91d5ac0 JB |
8994 | |
8995 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 8996 | * information must be scrapped. |
a91d5ac0 | 8997 | */ |
f466722c N |
8998 | if (!mddev->degraded) |
8999 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9000 | rdev->saved_raid_disk = -1; |
9001 | ||
9002 | md_update_sb(mddev, 1); | |
2953079c | 9003 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9004 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9005 | * clustered raid */ | |
9006 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9007 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9008 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9009 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9010 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9011 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9012 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9013 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9014 | /* |
9015 | * We call md_cluster_ops->update_size here because sync_size could | |
9016 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9017 | * so it is time to update size across cluster. | |
9018 | */ | |
9019 | if (mddev_is_clustered(mddev) && is_reshaped | |
9020 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9021 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9022 | wake_up(&resync_wait); |
a91d5ac0 JB |
9023 | /* flag recovery needed just to double check */ |
9024 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9025 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9026 | md_new_event(mddev); | |
9027 | if (mddev->event_work.func) | |
9028 | queue_work(md_misc_wq, &mddev->event_work); | |
9029 | } | |
6c144d31 | 9030 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9031 | |
fd01b88c | 9032 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9033 | { |
00bcb4ac | 9034 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9035 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9036 | !test_bit(Blocked, &rdev->flags) && |
9037 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9038 | msecs_to_jiffies(5000)); |
9039 | rdev_dec_pending(rdev, mddev); | |
9040 | } | |
9041 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9042 | ||
c6563a8c N |
9043 | void md_finish_reshape(struct mddev *mddev) |
9044 | { | |
9045 | /* called be personality module when reshape completes. */ | |
9046 | struct md_rdev *rdev; | |
9047 | ||
9048 | rdev_for_each(rdev, mddev) { | |
9049 | if (rdev->data_offset > rdev->new_data_offset) | |
9050 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9051 | else | |
9052 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9053 | rdev->data_offset = rdev->new_data_offset; | |
9054 | } | |
9055 | } | |
9056 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9057 | |
fc974ee2 | 9058 | /* Bad block management */ |
2230dfe4 | 9059 | |
fc974ee2 | 9060 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9061 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9062 | int is_new) |
2230dfe4 | 9063 | { |
85ad1d13 | 9064 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9065 | int rv; |
9066 | if (is_new) | |
9067 | s += rdev->new_data_offset; | |
9068 | else | |
9069 | s += rdev->data_offset; | |
fc974ee2 VV |
9070 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9071 | if (rv == 0) { | |
2230dfe4 | 9072 | /* Make sure they get written out promptly */ |
35b785f7 TM |
9073 | if (test_bit(ExternalBbl, &rdev->flags)) |
9074 | sysfs_notify(&rdev->kobj, NULL, | |
9075 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 9076 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9077 | set_mask_bits(&mddev->sb_flags, 0, |
9078 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9079 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9080 | return 1; |
9081 | } else | |
9082 | return 0; | |
2230dfe4 N |
9083 | } |
9084 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9085 | ||
c6563a8c N |
9086 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9087 | int is_new) | |
2230dfe4 | 9088 | { |
35b785f7 | 9089 | int rv; |
c6563a8c N |
9090 | if (is_new) |
9091 | s += rdev->new_data_offset; | |
9092 | else | |
9093 | s += rdev->data_offset; | |
35b785f7 TM |
9094 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9095 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
9096 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
9097 | return rv; | |
2230dfe4 N |
9098 | } |
9099 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9100 | ||
75c96f85 AB |
9101 | static int md_notify_reboot(struct notifier_block *this, |
9102 | unsigned long code, void *x) | |
1da177e4 LT |
9103 | { |
9104 | struct list_head *tmp; | |
fd01b88c | 9105 | struct mddev *mddev; |
2dba6a91 | 9106 | int need_delay = 0; |
1da177e4 | 9107 | |
c744a65c N |
9108 | for_each_mddev(mddev, tmp) { |
9109 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9110 | if (mddev->pers) |
9111 | __md_stop_writes(mddev); | |
0f62fb22 N |
9112 | if (mddev->persistent) |
9113 | mddev->safemode = 2; | |
c744a65c | 9114 | mddev_unlock(mddev); |
2dba6a91 | 9115 | } |
c744a65c | 9116 | need_delay = 1; |
1da177e4 | 9117 | } |
c744a65c N |
9118 | /* |
9119 | * certain more exotic SCSI devices are known to be | |
9120 | * volatile wrt too early system reboots. While the | |
9121 | * right place to handle this issue is the given | |
9122 | * driver, we do want to have a safe RAID driver ... | |
9123 | */ | |
9124 | if (need_delay) | |
9125 | mdelay(1000*1); | |
9126 | ||
1da177e4 LT |
9127 | return NOTIFY_DONE; |
9128 | } | |
9129 | ||
75c96f85 | 9130 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9131 | .notifier_call = md_notify_reboot, |
9132 | .next = NULL, | |
9133 | .priority = INT_MAX, /* before any real devices */ | |
9134 | }; | |
9135 | ||
9136 | static void md_geninit(void) | |
9137 | { | |
36a4e1fe | 9138 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9139 | |
c7705f34 | 9140 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
9141 | } |
9142 | ||
75c96f85 | 9143 | static int __init md_init(void) |
1da177e4 | 9144 | { |
e804ac78 TH |
9145 | int ret = -ENOMEM; |
9146 | ||
ada609ee | 9147 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9148 | if (!md_wq) |
9149 | goto err_wq; | |
9150 | ||
9151 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9152 | if (!md_misc_wq) | |
9153 | goto err_misc_wq; | |
9154 | ||
9155 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
9156 | goto err_md; | |
9157 | ||
9158 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9159 | goto err_mdp; | |
9160 | mdp_major = ret; | |
9161 | ||
af5628f0 | 9162 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9163 | md_probe, NULL, NULL); |
9164 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9165 | md_probe, NULL, NULL); |
9166 | ||
1da177e4 | 9167 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9168 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9169 | |
9170 | md_geninit(); | |
d710e138 | 9171 | return 0; |
1da177e4 | 9172 | |
e804ac78 TH |
9173 | err_mdp: |
9174 | unregister_blkdev(MD_MAJOR, "md"); | |
9175 | err_md: | |
9176 | destroy_workqueue(md_misc_wq); | |
9177 | err_misc_wq: | |
9178 | destroy_workqueue(md_wq); | |
9179 | err_wq: | |
9180 | return ret; | |
9181 | } | |
1da177e4 | 9182 | |
70bcecdb | 9183 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9184 | { |
70bcecdb GR |
9185 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9186 | struct md_rdev *rdev2; | |
9187 | int role, ret; | |
9188 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9189 | |
818da59f GJ |
9190 | /* |
9191 | * If size is changed in another node then we need to | |
9192 | * do resize as well. | |
9193 | */ | |
9194 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9195 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9196 | if (ret) | |
9197 | pr_info("md-cluster: resize failed\n"); | |
9198 | else | |
e64e4018 | 9199 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9200 | } |
9201 | ||
70bcecdb GR |
9202 | /* Check for change of roles in the active devices */ |
9203 | rdev_for_each(rdev2, mddev) { | |
9204 | if (test_bit(Faulty, &rdev2->flags)) | |
9205 | continue; | |
9206 | ||
9207 | /* Check if the roles changed */ | |
9208 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9209 | |
9210 | if (test_bit(Candidate, &rdev2->flags)) { | |
9211 | if (role == 0xfffe) { | |
9212 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9213 | md_kick_rdev_from_array(rdev2); | |
9214 | continue; | |
9215 | } | |
9216 | else | |
9217 | clear_bit(Candidate, &rdev2->flags); | |
9218 | } | |
9219 | ||
70bcecdb GR |
9220 | if (role != rdev2->raid_disk) { |
9221 | /* got activated */ | |
9222 | if (rdev2->raid_disk == -1 && role != 0xffff) { | |
9223 | rdev2->saved_raid_disk = role; | |
9224 | ret = remove_and_add_spares(mddev, rdev2); | |
9225 | pr_info("Activated spare: %s\n", | |
9d48739e | 9226 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9227 | /* wakeup mddev->thread here, so array could |
9228 | * perform resync with the new activated disk */ | |
9229 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9230 | md_wakeup_thread(mddev->thread); | |
9231 | ||
70bcecdb GR |
9232 | } |
9233 | /* device faulty | |
9234 | * We just want to do the minimum to mark the disk | |
9235 | * as faulty. The recovery is performed by the | |
9236 | * one who initiated the error. | |
9237 | */ | |
9238 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9239 | md_error(mddev, rdev2); | |
9240 | clear_bit(Blocked, &rdev2->flags); | |
9241 | } | |
9242 | } | |
1d7e3e96 | 9243 | } |
70bcecdb | 9244 | |
28c1b9fd GR |
9245 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9246 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9247 | |
7564beda GJ |
9248 | /* |
9249 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9250 | * so it is time to check reshape. | |
9251 | */ | |
9252 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9253 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9254 | /* | |
9255 | * reshape is happening in the remote node, we need to | |
9256 | * update reshape_position and call start_reshape. | |
9257 | */ | |
9258 | mddev->reshape_position = sb->reshape_position; | |
9259 | if (mddev->pers->update_reshape_pos) | |
9260 | mddev->pers->update_reshape_pos(mddev); | |
9261 | if (mddev->pers->start_reshape) | |
9262 | mddev->pers->start_reshape(mddev); | |
9263 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9264 | mddev->reshape_position != MaxSector && | |
9265 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9266 | /* reshape is just done in another node. */ | |
9267 | mddev->reshape_position = MaxSector; | |
9268 | if (mddev->pers->update_reshape_pos) | |
9269 | mddev->pers->update_reshape_pos(mddev); | |
9270 | } | |
9271 | ||
70bcecdb GR |
9272 | /* Finally set the event to be up to date */ |
9273 | mddev->events = le64_to_cpu(sb->events); | |
9274 | } | |
9275 | ||
9276 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9277 | { | |
9278 | int err; | |
9279 | struct page *swapout = rdev->sb_page; | |
9280 | struct mdp_superblock_1 *sb; | |
9281 | ||
9282 | /* Store the sb page of the rdev in the swapout temporary | |
9283 | * variable in case we err in the future | |
9284 | */ | |
9285 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9286 | err = alloc_disk_sb(rdev); |
9287 | if (err == 0) { | |
9288 | ClearPageUptodate(rdev->sb_page); | |
9289 | rdev->sb_loaded = 0; | |
9290 | err = super_types[mddev->major_version]. | |
9291 | load_super(rdev, NULL, mddev->minor_version); | |
9292 | } | |
70bcecdb GR |
9293 | if (err < 0) { |
9294 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9295 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9296 | if (rdev->sb_page) |
9297 | put_page(rdev->sb_page); | |
70bcecdb GR |
9298 | rdev->sb_page = swapout; |
9299 | rdev->sb_loaded = 1; | |
9300 | return err; | |
1d7e3e96 GR |
9301 | } |
9302 | ||
70bcecdb GR |
9303 | sb = page_address(rdev->sb_page); |
9304 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9305 | * is not set | |
9306 | */ | |
9307 | ||
9308 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9309 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9310 | ||
9311 | /* The other node finished recovery, call spare_active to set | |
9312 | * device In_sync and mddev->degraded | |
9313 | */ | |
9314 | if (rdev->recovery_offset == MaxSector && | |
9315 | !test_bit(In_sync, &rdev->flags) && | |
9316 | mddev->pers->spare_active(mddev)) | |
9317 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9318 | ||
9319 | put_page(swapout); | |
9320 | return 0; | |
9321 | } | |
9322 | ||
9323 | void md_reload_sb(struct mddev *mddev, int nr) | |
9324 | { | |
9325 | struct md_rdev *rdev; | |
9326 | int err; | |
9327 | ||
9328 | /* Find the rdev */ | |
9329 | rdev_for_each_rcu(rdev, mddev) { | |
9330 | if (rdev->desc_nr == nr) | |
9331 | break; | |
9332 | } | |
9333 | ||
9334 | if (!rdev || rdev->desc_nr != nr) { | |
9335 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9336 | return; | |
9337 | } | |
9338 | ||
9339 | err = read_rdev(mddev, rdev); | |
9340 | if (err < 0) | |
9341 | return; | |
9342 | ||
9343 | check_sb_changes(mddev, rdev); | |
9344 | ||
9345 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9346 | rdev_for_each_rcu(rdev, mddev) { |
9347 | if (!test_bit(Faulty, &rdev->flags)) | |
9348 | read_rdev(mddev, rdev); | |
9349 | } | |
1d7e3e96 GR |
9350 | } |
9351 | EXPORT_SYMBOL(md_reload_sb); | |
9352 | ||
1da177e4 LT |
9353 | #ifndef MODULE |
9354 | ||
9355 | /* | |
9356 | * Searches all registered partitions for autorun RAID arrays | |
9357 | * at boot time. | |
9358 | */ | |
4d936ec1 | 9359 | |
5b1f5bc3 | 9360 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9361 | static LIST_HEAD(all_detected_devices); |
9362 | struct detected_devices_node { | |
9363 | struct list_head list; | |
9364 | dev_t dev; | |
9365 | }; | |
1da177e4 LT |
9366 | |
9367 | void md_autodetect_dev(dev_t dev) | |
9368 | { | |
4d936ec1 ME |
9369 | struct detected_devices_node *node_detected_dev; |
9370 | ||
9371 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9372 | if (node_detected_dev) { | |
9373 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9374 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9375 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9376 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9377 | } |
1da177e4 LT |
9378 | } |
9379 | ||
1da177e4 LT |
9380 | static void autostart_arrays(int part) |
9381 | { | |
3cb03002 | 9382 | struct md_rdev *rdev; |
4d936ec1 ME |
9383 | struct detected_devices_node *node_detected_dev; |
9384 | dev_t dev; | |
9385 | int i_scanned, i_passed; | |
1da177e4 | 9386 | |
4d936ec1 ME |
9387 | i_scanned = 0; |
9388 | i_passed = 0; | |
1da177e4 | 9389 | |
9d48739e | 9390 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9391 | |
5b1f5bc3 | 9392 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9393 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9394 | i_scanned++; | |
9395 | node_detected_dev = list_entry(all_detected_devices.next, | |
9396 | struct detected_devices_node, list); | |
9397 | list_del(&node_detected_dev->list); | |
9398 | dev = node_detected_dev->dev; | |
9399 | kfree(node_detected_dev); | |
90bcf133 | 9400 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9401 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9402 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9403 | if (IS_ERR(rdev)) |
9404 | continue; | |
9405 | ||
403df478 | 9406 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9407 | continue; |
403df478 | 9408 | |
d0fae18f | 9409 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9410 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9411 | i_passed++; |
1da177e4 | 9412 | } |
5b1f5bc3 | 9413 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9414 | |
9d48739e | 9415 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9416 | |
9417 | autorun_devices(part); | |
9418 | } | |
9419 | ||
fdee8ae4 | 9420 | #endif /* !MODULE */ |
1da177e4 LT |
9421 | |
9422 | static __exit void md_exit(void) | |
9423 | { | |
fd01b88c | 9424 | struct mddev *mddev; |
1da177e4 | 9425 | struct list_head *tmp; |
e2f23b60 | 9426 | int delay = 1; |
8ab5e4c1 | 9427 | |
af5628f0 | 9428 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9429 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9430 | |
3dbd8c2e | 9431 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9432 | unregister_blkdev(mdp_major, "mdp"); |
9433 | unregister_reboot_notifier(&md_notifier); | |
9434 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9435 | |
9436 | /* We cannot unload the modules while some process is | |
9437 | * waiting for us in select() or poll() - wake them up | |
9438 | */ | |
9439 | md_unloading = 1; | |
9440 | while (waitqueue_active(&md_event_waiters)) { | |
9441 | /* not safe to leave yet */ | |
9442 | wake_up(&md_event_waiters); | |
9443 | msleep(delay); | |
9444 | delay += delay; | |
9445 | } | |
1da177e4 | 9446 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9447 | |
29ac4aa3 | 9448 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9449 | export_array(mddev); |
9356863c | 9450 | mddev->ctime = 0; |
d3374825 | 9451 | mddev->hold_active = 0; |
9356863c N |
9452 | /* |
9453 | * for_each_mddev() will call mddev_put() at the end of each | |
9454 | * iteration. As the mddev is now fully clear, this will | |
9455 | * schedule the mddev for destruction by a workqueue, and the | |
9456 | * destroy_workqueue() below will wait for that to complete. | |
9457 | */ | |
1da177e4 | 9458 | } |
e804ac78 TH |
9459 | destroy_workqueue(md_misc_wq); |
9460 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9461 | } |
9462 | ||
685784aa | 9463 | subsys_initcall(md_init); |
1da177e4 LT |
9464 | module_exit(md_exit) |
9465 | ||
e4dca7b7 | 9466 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e N |
9467 | { |
9468 | return sprintf(buffer, "%d", start_readonly); | |
9469 | } | |
e4dca7b7 | 9470 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9471 | { |
4c9309c0 | 9472 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9473 | } |
9474 | ||
80ca3a44 N |
9475 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9476 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9477 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9478 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9479 | |
1da177e4 | 9480 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9481 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9482 | MODULE_ALIAS("md"); |
72008652 | 9483 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |