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af1a8899 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | md.c : Multiple Devices driver for Linux | |
f72ffdd6 | 4 | Copyright (C) 1998, 1999, 2000 Ingo Molnar |
1da177e4 LT |
5 | |
6 | completely rewritten, based on the MD driver code from Marc Zyngier | |
7 | ||
8 | Changes: | |
9 | ||
10 | - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar | |
11 | - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com> | |
12 | - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net> | |
13 | - kerneld support by Boris Tobotras <boris@xtalk.msk.su> | |
14 | - kmod support by: Cyrus Durgin | |
15 | - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com> | |
16 | - Devfs support by Richard Gooch <rgooch@atnf.csiro.au> | |
17 | ||
18 | - lots of fixes and improvements to the RAID1/RAID5 and generic | |
19 | RAID code (such as request based resynchronization): | |
20 | ||
21 | Neil Brown <neilb@cse.unsw.edu.au>. | |
22 | ||
32a7627c N |
23 | - persistent bitmap code |
24 | Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc. | |
25 | ||
9d48739e N |
26 | |
27 | Errors, Warnings, etc. | |
28 | Please use: | |
29 | pr_crit() for error conditions that risk data loss | |
30 | pr_err() for error conditions that are unexpected, like an IO error | |
31 | or internal inconsistency | |
32 | pr_warn() for error conditions that could have been predicated, like | |
33 | adding a device to an array when it has incompatible metadata | |
34 | pr_info() for every interesting, very rare events, like an array starting | |
35 | or stopping, or resync starting or stopping | |
36 | pr_debug() for everything else. | |
37 | ||
1da177e4 LT |
38 | */ |
39 | ||
963c555e | 40 | #include <linux/sched/mm.h> |
3f07c014 | 41 | #include <linux/sched/signal.h> |
a6fb0934 | 42 | #include <linux/kthread.h> |
bff61975 | 43 | #include <linux/blkdev.h> |
fc974ee2 | 44 | #include <linux/badblocks.h> |
1da177e4 | 45 | #include <linux/sysctl.h> |
bff61975 | 46 | #include <linux/seq_file.h> |
ff01bb48 | 47 | #include <linux/fs.h> |
d7603b7e | 48 | #include <linux/poll.h> |
16f17b39 | 49 | #include <linux/ctype.h> |
e7d2860b | 50 | #include <linux/string.h> |
fb4d8c76 N |
51 | #include <linux/hdreg.h> |
52 | #include <linux/proc_fs.h> | |
53 | #include <linux/random.h> | |
056075c7 | 54 | #include <linux/module.h> |
fb4d8c76 | 55 | #include <linux/reboot.h> |
32a7627c | 56 | #include <linux/file.h> |
aa98aa31 | 57 | #include <linux/compat.h> |
25570727 | 58 | #include <linux/delay.h> |
bff61975 N |
59 | #include <linux/raid/md_p.h> |
60 | #include <linux/raid/md_u.h> | |
5a0e3ad6 | 61 | #include <linux/slab.h> |
4ad23a97 N |
62 | #include <linux/percpu-refcount.h> |
63 | ||
504634f6 | 64 | #include <trace/events/block.h> |
43b2e5d8 | 65 | #include "md.h" |
935fe098 | 66 | #include "md-bitmap.h" |
edb39c9d | 67 | #include "md-cluster.h" |
1da177e4 | 68 | |
1da177e4 | 69 | #ifndef MODULE |
d710e138 | 70 | static void autostart_arrays(int part); |
1da177e4 LT |
71 | #endif |
72 | ||
01f96c0a N |
73 | /* pers_list is a list of registered personalities protected |
74 | * by pers_lock. | |
75 | * pers_lock does extra service to protect accesses to | |
76 | * mddev->thread when the mutex cannot be held. | |
77 | */ | |
2604b703 | 78 | static LIST_HEAD(pers_list); |
1da177e4 LT |
79 | static DEFINE_SPINLOCK(pers_lock); |
80 | ||
28dec870 KO |
81 | static struct kobj_type md_ktype; |
82 | ||
edb39c9d | 83 | struct md_cluster_operations *md_cluster_ops; |
589a1c49 | 84 | EXPORT_SYMBOL(md_cluster_ops); |
2b598ee5 | 85 | static struct module *md_cluster_mod; |
edb39c9d | 86 | |
90b08710 | 87 | static DECLARE_WAIT_QUEUE_HEAD(resync_wait); |
e804ac78 TH |
88 | static struct workqueue_struct *md_wq; |
89 | static struct workqueue_struct *md_misc_wq; | |
90b08710 | 90 | |
746d3207 N |
91 | static int remove_and_add_spares(struct mddev *mddev, |
92 | struct md_rdev *this); | |
5aa61f42 | 93 | static void mddev_detach(struct mddev *mddev); |
746d3207 | 94 | |
1e50915f RB |
95 | /* |
96 | * Default number of read corrections we'll attempt on an rdev | |
97 | * before ejecting it from the array. We divide the read error | |
98 | * count by 2 for every hour elapsed between read errors. | |
99 | */ | |
100 | #define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20 | |
1da177e4 LT |
101 | /* |
102 | * Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit' | |
103 | * is 1000 KB/sec, so the extra system load does not show up that much. | |
104 | * Increase it if you want to have more _guaranteed_ speed. Note that | |
338cec32 | 105 | * the RAID driver will use the maximum available bandwidth if the IO |
1da177e4 LT |
106 | * subsystem is idle. There is also an 'absolute maximum' reconstruction |
107 | * speed limit - in case reconstruction slows down your system despite | |
108 | * idle IO detection. | |
109 | * | |
110 | * you can change it via /proc/sys/dev/raid/speed_limit_min and _max. | |
88202a0c | 111 | * or /sys/block/mdX/md/sync_speed_{min,max} |
1da177e4 LT |
112 | */ |
113 | ||
114 | static int sysctl_speed_limit_min = 1000; | |
115 | static int sysctl_speed_limit_max = 200000; | |
fd01b88c | 116 | static inline int speed_min(struct mddev *mddev) |
88202a0c N |
117 | { |
118 | return mddev->sync_speed_min ? | |
119 | mddev->sync_speed_min : sysctl_speed_limit_min; | |
120 | } | |
121 | ||
fd01b88c | 122 | static inline int speed_max(struct mddev *mddev) |
88202a0c N |
123 | { |
124 | return mddev->sync_speed_max ? | |
125 | mddev->sync_speed_max : sysctl_speed_limit_max; | |
126 | } | |
1da177e4 | 127 | |
3e148a32 GJ |
128 | static int rdev_init_wb(struct md_rdev *rdev) |
129 | { | |
130 | if (rdev->bdev->bd_queue->nr_hw_queues == 1) | |
131 | return 0; | |
132 | ||
133 | spin_lock_init(&rdev->wb_list_lock); | |
134 | INIT_LIST_HEAD(&rdev->wb_list); | |
135 | init_waitqueue_head(&rdev->wb_io_wait); | |
136 | set_bit(WBCollisionCheck, &rdev->flags); | |
137 | ||
138 | return 1; | |
139 | } | |
140 | ||
963c555e GJ |
141 | /* |
142 | * Create wb_info_pool if rdev is the first multi-queue device flaged | |
143 | * with writemostly, also write-behind mode is enabled. | |
144 | */ | |
145 | void mddev_create_wb_pool(struct mddev *mddev, struct md_rdev *rdev, | |
146 | bool is_suspend) | |
147 | { | |
148 | if (mddev->bitmap_info.max_write_behind == 0) | |
149 | return; | |
150 | ||
151 | if (!test_bit(WriteMostly, &rdev->flags) || !rdev_init_wb(rdev)) | |
152 | return; | |
153 | ||
154 | if (mddev->wb_info_pool == NULL) { | |
155 | unsigned int noio_flag; | |
156 | ||
157 | if (!is_suspend) | |
158 | mddev_suspend(mddev); | |
159 | noio_flag = memalloc_noio_save(); | |
160 | mddev->wb_info_pool = mempool_create_kmalloc_pool(NR_WB_INFOS, | |
161 | sizeof(struct wb_info)); | |
162 | memalloc_noio_restore(noio_flag); | |
163 | if (!mddev->wb_info_pool) | |
164 | pr_err("can't alloc memory pool for writemostly\n"); | |
165 | if (!is_suspend) | |
166 | mddev_resume(mddev); | |
167 | } | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(mddev_create_wb_pool); | |
170 | ||
171 | /* | |
172 | * destroy wb_info_pool if rdev is the last device flaged with WBCollisionCheck. | |
173 | */ | |
174 | static void mddev_destroy_wb_pool(struct mddev *mddev, struct md_rdev *rdev) | |
175 | { | |
176 | if (!test_and_clear_bit(WBCollisionCheck, &rdev->flags)) | |
177 | return; | |
178 | ||
179 | if (mddev->wb_info_pool) { | |
180 | struct md_rdev *temp; | |
181 | int num = 0; | |
182 | ||
183 | /* | |
184 | * Check if other rdevs need wb_info_pool. | |
185 | */ | |
186 | rdev_for_each(temp, mddev) | |
187 | if (temp != rdev && | |
188 | test_bit(WBCollisionCheck, &temp->flags)) | |
189 | num++; | |
190 | if (!num) { | |
191 | mddev_suspend(rdev->mddev); | |
192 | mempool_destroy(mddev->wb_info_pool); | |
193 | mddev->wb_info_pool = NULL; | |
194 | mddev_resume(rdev->mddev); | |
195 | } | |
196 | } | |
197 | } | |
198 | ||
1da177e4 LT |
199 | static struct ctl_table_header *raid_table_header; |
200 | ||
82592c38 | 201 | static struct ctl_table raid_table[] = { |
1da177e4 | 202 | { |
1da177e4 LT |
203 | .procname = "speed_limit_min", |
204 | .data = &sysctl_speed_limit_min, | |
205 | .maxlen = sizeof(int), | |
80ca3a44 | 206 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 207 | .proc_handler = proc_dointvec, |
1da177e4 LT |
208 | }, |
209 | { | |
1da177e4 LT |
210 | .procname = "speed_limit_max", |
211 | .data = &sysctl_speed_limit_max, | |
212 | .maxlen = sizeof(int), | |
80ca3a44 | 213 | .mode = S_IRUGO|S_IWUSR, |
6d456111 | 214 | .proc_handler = proc_dointvec, |
1da177e4 | 215 | }, |
894d2491 | 216 | { } |
1da177e4 LT |
217 | }; |
218 | ||
82592c38 | 219 | static struct ctl_table raid_dir_table[] = { |
1da177e4 | 220 | { |
1da177e4 LT |
221 | .procname = "raid", |
222 | .maxlen = 0, | |
80ca3a44 | 223 | .mode = S_IRUGO|S_IXUGO, |
1da177e4 LT |
224 | .child = raid_table, |
225 | }, | |
894d2491 | 226 | { } |
1da177e4 LT |
227 | }; |
228 | ||
82592c38 | 229 | static struct ctl_table raid_root_table[] = { |
1da177e4 | 230 | { |
1da177e4 LT |
231 | .procname = "dev", |
232 | .maxlen = 0, | |
233 | .mode = 0555, | |
234 | .child = raid_dir_table, | |
235 | }, | |
894d2491 | 236 | { } |
1da177e4 LT |
237 | }; |
238 | ||
83d5cde4 | 239 | static const struct block_device_operations md_fops; |
1da177e4 | 240 | |
f91de92e N |
241 | static int start_readonly; |
242 | ||
78b6350d N |
243 | /* |
244 | * The original mechanism for creating an md device is to create | |
245 | * a device node in /dev and to open it. This causes races with device-close. | |
246 | * The preferred method is to write to the "new_array" module parameter. | |
247 | * This can avoid races. | |
248 | * Setting create_on_open to false disables the original mechanism | |
249 | * so all the races disappear. | |
250 | */ | |
251 | static bool create_on_open = true; | |
252 | ||
a167f663 | 253 | struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c | 254 | struct mddev *mddev) |
a167f663 | 255 | { |
afeee514 | 256 | if (!mddev || !bioset_initialized(&mddev->bio_set)) |
a167f663 N |
257 | return bio_alloc(gfp_mask, nr_iovecs); |
258 | ||
6251691a | 259 | return bio_alloc_bioset(gfp_mask, nr_iovecs, &mddev->bio_set); |
a167f663 N |
260 | } |
261 | EXPORT_SYMBOL_GPL(bio_alloc_mddev); | |
262 | ||
5a85071c N |
263 | static struct bio *md_bio_alloc_sync(struct mddev *mddev) |
264 | { | |
afeee514 | 265 | if (!mddev || !bioset_initialized(&mddev->sync_set)) |
5a85071c N |
266 | return bio_alloc(GFP_NOIO, 1); |
267 | ||
afeee514 | 268 | return bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set); |
5a85071c N |
269 | } |
270 | ||
d7603b7e N |
271 | /* |
272 | * We have a system wide 'event count' that is incremented | |
273 | * on any 'interesting' event, and readers of /proc/mdstat | |
274 | * can use 'poll' or 'select' to find out when the event | |
275 | * count increases. | |
276 | * | |
277 | * Events are: | |
278 | * start array, stop array, error, add device, remove device, | |
279 | * start build, activate spare | |
280 | */ | |
2989ddbd | 281 | static DECLARE_WAIT_QUEUE_HEAD(md_event_waiters); |
d7603b7e | 282 | static atomic_t md_event_count; |
fd01b88c | 283 | void md_new_event(struct mddev *mddev) |
d7603b7e N |
284 | { |
285 | atomic_inc(&md_event_count); | |
286 | wake_up(&md_event_waiters); | |
287 | } | |
29269553 | 288 | EXPORT_SYMBOL_GPL(md_new_event); |
d7603b7e | 289 | |
1da177e4 LT |
290 | /* |
291 | * Enables to iterate over all existing md arrays | |
292 | * all_mddevs_lock protects this list. | |
293 | */ | |
294 | static LIST_HEAD(all_mddevs); | |
295 | static DEFINE_SPINLOCK(all_mddevs_lock); | |
296 | ||
1da177e4 LT |
297 | /* |
298 | * iterates through all used mddevs in the system. | |
299 | * We take care to grab the all_mddevs_lock whenever navigating | |
300 | * the list, and to always hold a refcount when unlocked. | |
301 | * Any code which breaks out of this loop while own | |
302 | * a reference to the current mddev and must mddev_put it. | |
303 | */ | |
fd01b88c | 304 | #define for_each_mddev(_mddev,_tmp) \ |
1da177e4 | 305 | \ |
f72ffdd6 | 306 | for (({ spin_lock(&all_mddevs_lock); \ |
fd01b88c N |
307 | _tmp = all_mddevs.next; \ |
308 | _mddev = NULL;}); \ | |
309 | ({ if (_tmp != &all_mddevs) \ | |
310 | mddev_get(list_entry(_tmp, struct mddev, all_mddevs));\ | |
1da177e4 | 311 | spin_unlock(&all_mddevs_lock); \ |
fd01b88c N |
312 | if (_mddev) mddev_put(_mddev); \ |
313 | _mddev = list_entry(_tmp, struct mddev, all_mddevs); \ | |
314 | _tmp != &all_mddevs;}); \ | |
1da177e4 | 315 | ({ spin_lock(&all_mddevs_lock); \ |
fd01b88c | 316 | _tmp = _tmp->next;}) \ |
1da177e4 LT |
317 | ) |
318 | ||
409c57f3 N |
319 | /* Rather than calling directly into the personality make_request function, |
320 | * IO requests come here first so that we can check if the device is | |
321 | * being suspended pending a reconfiguration. | |
322 | * We hold a refcount over the call to ->make_request. By the time that | |
323 | * call has finished, the bio has been linked into some internal structure | |
324 | * and so is visible to ->quiesce(), so we don't need the refcount any more. | |
325 | */ | |
b3143b9a N |
326 | static bool is_suspended(struct mddev *mddev, struct bio *bio) |
327 | { | |
328 | if (mddev->suspended) | |
329 | return true; | |
330 | if (bio_data_dir(bio) != WRITE) | |
331 | return false; | |
332 | if (mddev->suspend_lo >= mddev->suspend_hi) | |
333 | return false; | |
334 | if (bio->bi_iter.bi_sector >= mddev->suspend_hi) | |
335 | return false; | |
336 | if (bio_end_sector(bio) < mddev->suspend_lo) | |
337 | return false; | |
338 | return true; | |
339 | } | |
340 | ||
393debc2 SL |
341 | void md_handle_request(struct mddev *mddev, struct bio *bio) |
342 | { | |
343 | check_suspended: | |
344 | rcu_read_lock(); | |
b3143b9a | 345 | if (is_suspended(mddev, bio)) { |
393debc2 SL |
346 | DEFINE_WAIT(__wait); |
347 | for (;;) { | |
348 | prepare_to_wait(&mddev->sb_wait, &__wait, | |
349 | TASK_UNINTERRUPTIBLE); | |
b3143b9a | 350 | if (!is_suspended(mddev, bio)) |
393debc2 SL |
351 | break; |
352 | rcu_read_unlock(); | |
353 | schedule(); | |
354 | rcu_read_lock(); | |
355 | } | |
356 | finish_wait(&mddev->sb_wait, &__wait); | |
357 | } | |
358 | atomic_inc(&mddev->active_io); | |
359 | rcu_read_unlock(); | |
360 | ||
361 | if (!mddev->pers->make_request(mddev, bio)) { | |
362 | atomic_dec(&mddev->active_io); | |
363 | wake_up(&mddev->sb_wait); | |
364 | goto check_suspended; | |
365 | } | |
366 | ||
367 | if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) | |
368 | wake_up(&mddev->sb_wait); | |
369 | } | |
370 | EXPORT_SYMBOL(md_handle_request); | |
371 | ||
dece1635 | 372 | static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 | 373 | { |
49077326 | 374 | const int rw = bio_data_dir(bio); |
ddcf35d3 | 375 | const int sgrp = op_stat_group(bio_op(bio)); |
fd01b88c | 376 | struct mddev *mddev = q->queuedata; |
e91ece55 | 377 | unsigned int sectors; |
49077326 | 378 | |
62f7b198 GP |
379 | if (unlikely(test_bit(MD_BROKEN, &mddev->flags)) && (rw == WRITE)) { |
380 | bio_io_error(bio); | |
381 | return BLK_QC_T_NONE; | |
382 | } | |
383 | ||
af67c31f | 384 | blk_queue_split(q, &bio); |
54efd50b | 385 | |
274d8cbd | 386 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 387 | bio_io_error(bio); |
dece1635 | 388 | return BLK_QC_T_NONE; |
409c57f3 | 389 | } |
bbfa57c0 | 390 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 391 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 392 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 393 | bio_endio(bio); |
dece1635 | 394 | return BLK_QC_T_NONE; |
bbfa57c0 | 395 | } |
49077326 | 396 | |
e91ece55 CM |
397 | /* |
398 | * save the sectors now since our bio can | |
399 | * go away inside make_request | |
400 | */ | |
401 | sectors = bio_sectors(bio); | |
9c573de3 | 402 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 403 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
404 | |
405 | md_handle_request(mddev, bio); | |
49077326 | 406 | |
112f158f MS |
407 | part_stat_lock(); |
408 | part_stat_inc(&mddev->gendisk->part0, ios[sgrp]); | |
409 | part_stat_add(&mddev->gendisk->part0, sectors[sgrp], sectors); | |
74672d06 | 410 | part_stat_unlock(); |
49077326 | 411 | |
dece1635 | 412 | return BLK_QC_T_NONE; |
409c57f3 N |
413 | } |
414 | ||
9e35b99c N |
415 | /* mddev_suspend makes sure no new requests are submitted |
416 | * to the device, and that any requests that have been submitted | |
417 | * are completely handled. | |
afa0f557 N |
418 | * Once mddev_detach() is called and completes, the module will be |
419 | * completely unused. | |
9e35b99c | 420 | */ |
fd01b88c | 421 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 422 | { |
092398dc | 423 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 424 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
425 | if (mddev->suspended++) |
426 | return; | |
409c57f3 | 427 | synchronize_rcu(); |
cc27b0c7 | 428 | wake_up(&mddev->sb_wait); |
35bfc521 N |
429 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
430 | smp_mb__after_atomic(); | |
409c57f3 N |
431 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
432 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
433 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
434 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
435 | |
436 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 437 | } |
390ee602 | 438 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 439 | |
fd01b88c | 440 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 441 | { |
4d5324f7 | 442 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
443 | if (--mddev->suspended) |
444 | return; | |
409c57f3 N |
445 | wake_up(&mddev->sb_wait); |
446 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 447 | |
47525e59 | 448 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
449 | md_wakeup_thread(mddev->thread); |
450 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 451 | } |
390ee602 | 452 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 453 | |
fd01b88c | 454 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 455 | { |
5c675f83 N |
456 | struct md_personality *pers = mddev->pers; |
457 | int ret = 0; | |
458 | ||
459 | rcu_read_lock(); | |
460 | if (mddev->suspended) | |
461 | ret = 1; | |
462 | else if (pers && pers->congested) | |
463 | ret = pers->congested(mddev, bits); | |
464 | rcu_read_unlock(); | |
465 | return ret; | |
466 | } | |
467 | EXPORT_SYMBOL_GPL(mddev_congested); | |
468 | static int md_congested(void *data, int bits) | |
469 | { | |
470 | struct mddev *mddev = data; | |
471 | return mddev_congested(mddev, bits); | |
3fa841d7 | 472 | } |
3fa841d7 | 473 | |
a2826aa9 | 474 | /* |
e9c7469b | 475 | * Generic flush handling for md |
a2826aa9 N |
476 | */ |
477 | ||
4bc034d3 | 478 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 479 | { |
4bc034d3 N |
480 | struct md_rdev *rdev = bio->bi_private; |
481 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
482 | |
483 | rdev_dec_pending(rdev, mddev); | |
484 | ||
4bc034d3 N |
485 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
486 | /* The pre-request flush has finished */ | |
487 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 488 | } |
4bc034d3 | 489 | bio_put(bio); |
5a409b4f | 490 | } |
a7a07e69 | 491 | |
4bc034d3 N |
492 | static void md_submit_flush_data(struct work_struct *ws); |
493 | ||
494 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 495 | { |
4bc034d3 | 496 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 497 | struct md_rdev *rdev; |
a2826aa9 | 498 | |
2bc13b83 | 499 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
500 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
501 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 502 | rcu_read_lock(); |
dafb20fa | 503 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
504 | if (rdev->raid_disk >= 0 && |
505 | !test_bit(Faulty, &rdev->flags)) { | |
506 | /* Take two references, one is dropped | |
507 | * when request finishes, one after | |
508 | * we reclaim rcu_read_lock | |
509 | */ | |
510 | struct bio *bi; | |
511 | atomic_inc(&rdev->nr_pending); | |
512 | atomic_inc(&rdev->nr_pending); | |
513 | rcu_read_unlock(); | |
b5e1b8ce | 514 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
5a409b4f | 515 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
516 | bi->bi_private = rdev; |
517 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 518 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 519 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 520 | submit_bio(bi); |
a2826aa9 N |
521 | rcu_read_lock(); |
522 | rdev_dec_pending(rdev, mddev); | |
523 | } | |
524 | rcu_read_unlock(); | |
4bc034d3 N |
525 | if (atomic_dec_and_test(&mddev->flush_pending)) |
526 | queue_work(md_wq, &mddev->flush_work); | |
527 | } | |
a2826aa9 | 528 | |
4bc034d3 N |
529 | static void md_submit_flush_data(struct work_struct *ws) |
530 | { | |
531 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
532 | struct bio *bio = mddev->flush_bio; | |
533 | ||
534 | /* | |
535 | * must reset flush_bio before calling into md_handle_request to avoid a | |
536 | * deadlock, because other bios passed md_handle_request suspend check | |
537 | * could wait for this and below md_handle_request could wait for those | |
538 | * bios because of suspend check | |
539 | */ | |
2bc13b83 | 540 | mddev->last_flush = mddev->start_flush; |
4bc034d3 N |
541 | mddev->flush_bio = NULL; |
542 | wake_up(&mddev->sb_wait); | |
543 | ||
544 | if (bio->bi_iter.bi_size == 0) { | |
545 | /* an empty barrier - all done */ | |
546 | bio_endio(bio); | |
547 | } else { | |
548 | bio->bi_opf &= ~REQ_PREFLUSH; | |
549 | md_handle_request(mddev, bio); | |
a2826aa9 | 550 | } |
a2826aa9 | 551 | } |
4bc034d3 | 552 | |
775d7831 DJ |
553 | /* |
554 | * Manages consolidation of flushes and submitting any flushes needed for | |
555 | * a bio with REQ_PREFLUSH. Returns true if the bio is finished or is | |
556 | * being finished in another context. Returns false if the flushing is | |
557 | * complete but still needs the I/O portion of the bio to be processed. | |
558 | */ | |
559 | bool md_flush_request(struct mddev *mddev, struct bio *bio) | |
4bc034d3 | 560 | { |
2bc13b83 | 561 | ktime_t start = ktime_get_boottime(); |
4bc034d3 N |
562 | spin_lock_irq(&mddev->lock); |
563 | wait_event_lock_irq(mddev->sb_wait, | |
2bc13b83 N |
564 | !mddev->flush_bio || |
565 | ktime_after(mddev->last_flush, start), | |
4bc034d3 | 566 | mddev->lock); |
2bc13b83 N |
567 | if (!ktime_after(mddev->last_flush, start)) { |
568 | WARN_ON(mddev->flush_bio); | |
569 | mddev->flush_bio = bio; | |
570 | bio = NULL; | |
571 | } | |
4bc034d3 N |
572 | spin_unlock_irq(&mddev->lock); |
573 | ||
2bc13b83 N |
574 | if (!bio) { |
575 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
576 | queue_work(md_wq, &mddev->flush_work); | |
577 | } else { | |
578 | /* flush was performed for some other bio while we waited. */ | |
579 | if (bio->bi_iter.bi_size == 0) | |
580 | /* an empty barrier - all done */ | |
581 | bio_endio(bio); | |
582 | else { | |
583 | bio->bi_opf &= ~REQ_PREFLUSH; | |
775d7831 | 584 | return false; |
2bc13b83 N |
585 | } |
586 | } | |
775d7831 | 587 | return true; |
4bc034d3 | 588 | } |
e9c7469b | 589 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 590 | |
fd01b88c | 591 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
592 | { |
593 | atomic_inc(&mddev->active); | |
594 | return mddev; | |
595 | } | |
596 | ||
5fd3a17e | 597 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 598 | |
fd01b88c | 599 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
600 | { |
601 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
602 | return; | |
d3374825 | 603 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
604 | mddev->ctime == 0 && !mddev->hold_active) { |
605 | /* Array is not configured at all, and not held active, | |
606 | * so destroy it */ | |
af8a2434 | 607 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
608 | |
609 | /* | |
610 | * Call queue_work inside the spinlock so that | |
611 | * flush_workqueue() after mddev_find will succeed in waiting | |
612 | * for the work to be done. | |
613 | */ | |
614 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
615 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
616 | } |
617 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
618 | } |
619 | ||
8376d3c1 | 620 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 621 | |
fd01b88c | 622 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 623 | { |
28dec870 | 624 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
625 | mutex_init(&mddev->open_mutex); |
626 | mutex_init(&mddev->reconfig_mutex); | |
627 | mutex_init(&mddev->bitmap_info.mutex); | |
628 | INIT_LIST_HEAD(&mddev->disks); | |
629 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 630 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
631 | atomic_set(&mddev->active, 1); |
632 | atomic_set(&mddev->openers, 0); | |
633 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 634 | spin_lock_init(&mddev->lock); |
4bc034d3 | 635 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
636 | init_waitqueue_head(&mddev->sb_wait); |
637 | init_waitqueue_head(&mddev->recovery_wait); | |
638 | mddev->reshape_position = MaxSector; | |
2c810cdd | 639 | mddev->reshape_backwards = 0; |
c4a39551 | 640 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
641 | mddev->resync_min = 0; |
642 | mddev->resync_max = MaxSector; | |
643 | mddev->level = LEVEL_NONE; | |
644 | } | |
390ee602 | 645 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 646 | |
f72ffdd6 | 647 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 648 | { |
fd01b88c | 649 | struct mddev *mddev, *new = NULL; |
1da177e4 | 650 | |
8f5f02c4 N |
651 | if (unit && MAJOR(unit) != MD_MAJOR) |
652 | unit &= ~((1<<MdpMinorShift)-1); | |
653 | ||
1da177e4 LT |
654 | retry: |
655 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
656 | |
657 | if (unit) { | |
658 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
659 | if (mddev->unit == unit) { | |
660 | mddev_get(mddev); | |
661 | spin_unlock(&all_mddevs_lock); | |
662 | kfree(new); | |
663 | return mddev; | |
664 | } | |
665 | ||
666 | if (new) { | |
667 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 668 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
669 | new->hold_active = UNTIL_IOCTL; |
670 | return new; | |
1da177e4 | 671 | } |
efeb53c0 N |
672 | } else if (new) { |
673 | /* find an unused unit number */ | |
674 | static int next_minor = 512; | |
675 | int start = next_minor; | |
676 | int is_free = 0; | |
677 | int dev = 0; | |
678 | while (!is_free) { | |
679 | dev = MKDEV(MD_MAJOR, next_minor); | |
680 | next_minor++; | |
681 | if (next_minor > MINORMASK) | |
682 | next_minor = 0; | |
683 | if (next_minor == start) { | |
684 | /* Oh dear, all in use. */ | |
685 | spin_unlock(&all_mddevs_lock); | |
686 | kfree(new); | |
687 | return NULL; | |
688 | } | |
f72ffdd6 | 689 | |
efeb53c0 N |
690 | is_free = 1; |
691 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
692 | if (mddev->unit == dev) { | |
693 | is_free = 0; | |
694 | break; | |
695 | } | |
696 | } | |
697 | new->unit = dev; | |
698 | new->md_minor = MINOR(dev); | |
699 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
700 | list_add(&new->all_mddevs, &all_mddevs); |
701 | spin_unlock(&all_mddevs_lock); | |
702 | return new; | |
703 | } | |
704 | spin_unlock(&all_mddevs_lock); | |
705 | ||
9ffae0cf | 706 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
707 | if (!new) |
708 | return NULL; | |
709 | ||
1da177e4 LT |
710 | new->unit = unit; |
711 | if (MAJOR(unit) == MD_MAJOR) | |
712 | new->md_minor = MINOR(unit); | |
713 | else | |
714 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
715 | ||
fafd7fb0 | 716 | mddev_init(new); |
1da177e4 | 717 | |
1da177e4 LT |
718 | goto retry; |
719 | } | |
720 | ||
b6eb127d N |
721 | static struct attribute_group md_redundancy_group; |
722 | ||
5c47daf6 | 723 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 724 | { |
a64c876f | 725 | if (mddev->to_remove) { |
b6eb127d N |
726 | /* These cannot be removed under reconfig_mutex as |
727 | * an access to the files will try to take reconfig_mutex | |
728 | * while holding the file unremovable, which leads to | |
729 | * a deadlock. | |
bb4f1e9d N |
730 | * So hold set sysfs_active while the remove in happeing, |
731 | * and anything else which might set ->to_remove or my | |
732 | * otherwise change the sysfs namespace will fail with | |
733 | * -EBUSY if sysfs_active is still set. | |
734 | * We set sysfs_active under reconfig_mutex and elsewhere | |
735 | * test it under the same mutex to ensure its correct value | |
736 | * is seen. | |
b6eb127d | 737 | */ |
a64c876f N |
738 | struct attribute_group *to_remove = mddev->to_remove; |
739 | mddev->to_remove = NULL; | |
bb4f1e9d | 740 | mddev->sysfs_active = 1; |
b6eb127d N |
741 | mutex_unlock(&mddev->reconfig_mutex); |
742 | ||
00bcb4ac N |
743 | if (mddev->kobj.sd) { |
744 | if (to_remove != &md_redundancy_group) | |
745 | sysfs_remove_group(&mddev->kobj, to_remove); | |
746 | if (mddev->pers == NULL || | |
747 | mddev->pers->sync_request == NULL) { | |
748 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
749 | if (mddev->sysfs_action) | |
750 | sysfs_put(mddev->sysfs_action); | |
751 | mddev->sysfs_action = NULL; | |
752 | } | |
a64c876f | 753 | } |
bb4f1e9d | 754 | mddev->sysfs_active = 0; |
b6eb127d N |
755 | } else |
756 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 757 | |
751e67ca CD |
758 | /* As we've dropped the mutex we need a spinlock to |
759 | * make sure the thread doesn't disappear | |
01f96c0a N |
760 | */ |
761 | spin_lock(&pers_lock); | |
005eca5e | 762 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 763 | wake_up(&mddev->sb_wait); |
01f96c0a | 764 | spin_unlock(&pers_lock); |
1da177e4 | 765 | } |
5c47daf6 | 766 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 767 | |
57d051dc | 768 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
769 | { |
770 | struct md_rdev *rdev; | |
771 | ||
772 | rdev_for_each_rcu(rdev, mddev) | |
773 | if (rdev->desc_nr == nr) | |
774 | return rdev; | |
775 | ||
776 | return NULL; | |
777 | } | |
57d051dc | 778 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
779 | |
780 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 781 | { |
3cb03002 | 782 | struct md_rdev *rdev; |
1da177e4 | 783 | |
dafb20fa | 784 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
785 | if (rdev->bdev->bd_dev == dev) |
786 | return rdev; | |
159ec1fc | 787 | |
1da177e4 LT |
788 | return NULL; |
789 | } | |
790 | ||
1532d9e8 | 791 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
792 | { |
793 | struct md_rdev *rdev; | |
794 | ||
795 | rdev_for_each_rcu(rdev, mddev) | |
796 | if (rdev->bdev->bd_dev == dev) | |
797 | return rdev; | |
798 | ||
799 | return NULL; | |
800 | } | |
1532d9e8 | 801 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 802 | |
84fc4b56 | 803 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 804 | { |
84fc4b56 | 805 | struct md_personality *pers; |
d9d166c2 N |
806 | list_for_each_entry(pers, &pers_list, list) { |
807 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 808 | return pers; |
d9d166c2 N |
809 | if (strcmp(pers->name, clevel)==0) |
810 | return pers; | |
811 | } | |
2604b703 N |
812 | return NULL; |
813 | } | |
814 | ||
b73df2d3 | 815 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 816 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 817 | { |
57b2caa3 | 818 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 819 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
820 | } |
821 | ||
f72ffdd6 | 822 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 823 | { |
1da177e4 | 824 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 825 | if (!rdev->sb_page) |
ebc24337 | 826 | return -ENOMEM; |
1da177e4 LT |
827 | return 0; |
828 | } | |
829 | ||
545c8795 | 830 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
831 | { |
832 | if (rdev->sb_page) { | |
2d1f3b5d | 833 | put_page(rdev->sb_page); |
1da177e4 LT |
834 | rdev->sb_loaded = 0; |
835 | rdev->sb_page = NULL; | |
0f420358 | 836 | rdev->sb_start = 0; |
dd8ac336 | 837 | rdev->sectors = 0; |
1da177e4 | 838 | } |
2699b672 N |
839 | if (rdev->bb_page) { |
840 | put_page(rdev->bb_page); | |
841 | rdev->bb_page = NULL; | |
842 | } | |
d3b407fb | 843 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 844 | } |
545c8795 | 845 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 846 | |
4246a0b6 | 847 | static void super_written(struct bio *bio) |
7bfa19f2 | 848 | { |
3cb03002 | 849 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 850 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 851 | |
4e4cbee9 CH |
852 | if (bio->bi_status) { |
853 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 854 | md_error(mddev, rdev); |
46533ff7 N |
855 | if (!test_bit(Faulty, &rdev->flags) |
856 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 857 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
858 | set_bit(LastDev, &rdev->flags); |
859 | } | |
860 | } else | |
861 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 862 | |
a9701a30 N |
863 | if (atomic_dec_and_test(&mddev->pending_writes)) |
864 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 865 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 866 | bio_put(bio); |
7bfa19f2 N |
867 | } |
868 | ||
fd01b88c | 869 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
870 | sector_t sector, int size, struct page *page) |
871 | { | |
872 | /* write first size bytes of page to sector of rdev | |
873 | * Increment mddev->pending_writes before returning | |
874 | * and decrement it on completion, waking up sb_wait | |
875 | * if zero is reached. | |
876 | * If an error occurred, call md_error | |
877 | */ | |
46533ff7 N |
878 | struct bio *bio; |
879 | int ff = 0; | |
880 | ||
4b6c1060 HM |
881 | if (!page) |
882 | return; | |
883 | ||
46533ff7 N |
884 | if (test_bit(Faulty, &rdev->flags)) |
885 | return; | |
886 | ||
5a85071c | 887 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 888 | |
ed3b98c7 SL |
889 | atomic_inc(&rdev->nr_pending); |
890 | ||
74d46992 | 891 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 892 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
893 | bio_add_page(bio, page, size, 0); |
894 | bio->bi_private = rdev; | |
895 | bio->bi_end_io = super_written; | |
46533ff7 N |
896 | |
897 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
898 | test_bit(FailFast, &rdev->flags) && | |
899 | !test_bit(LastDev, &rdev->flags)) | |
900 | ff = MD_FAILFAST; | |
5a8948f8 | 901 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 902 | |
7bfa19f2 | 903 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 904 | submit_bio(bio); |
a9701a30 N |
905 | } |
906 | ||
46533ff7 | 907 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 908 | { |
e9c7469b | 909 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 910 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 911 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
912 | return -EAGAIN; |
913 | return 0; | |
7bfa19f2 N |
914 | } |
915 | ||
3cb03002 | 916 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 917 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 918 | { |
5a85071c | 919 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
920 | int ret; |
921 | ||
74d46992 CH |
922 | if (metadata_op && rdev->meta_bdev) |
923 | bio_set_dev(bio, rdev->meta_bdev); | |
924 | else | |
925 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 926 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 927 | if (metadata_op) |
4f024f37 | 928 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
929 | else if (rdev->mddev->reshape_position != MaxSector && |
930 | (rdev->mddev->reshape_backwards == | |
931 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 932 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 933 | else |
4f024f37 | 934 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 935 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
936 | |
937 | submit_bio_wait(bio); | |
1da177e4 | 938 | |
4e4cbee9 | 939 | ret = !bio->bi_status; |
1da177e4 LT |
940 | bio_put(bio); |
941 | return ret; | |
942 | } | |
a8745db2 | 943 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 944 | |
f72ffdd6 | 945 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
946 | { |
947 | char b[BDEVNAME_SIZE]; | |
403df478 | 948 | |
1da177e4 LT |
949 | if (rdev->sb_loaded) |
950 | return 0; | |
951 | ||
796a5cf0 | 952 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
953 | goto fail; |
954 | rdev->sb_loaded = 1; | |
955 | return 0; | |
956 | ||
957 | fail: | |
9d48739e N |
958 | pr_err("md: disabled device %s, could not read superblock.\n", |
959 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
960 | return -EINVAL; |
961 | } | |
962 | ||
e6fd2093 | 963 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 964 | { |
f72ffdd6 | 965 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
966 | sb1->set_uuid1 == sb2->set_uuid1 && |
967 | sb1->set_uuid2 == sb2->set_uuid2 && | |
968 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
969 | } |
970 | ||
e6fd2093 | 971 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
972 | { |
973 | int ret; | |
974 | mdp_super_t *tmp1, *tmp2; | |
975 | ||
976 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
977 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
978 | ||
979 | if (!tmp1 || !tmp2) { | |
980 | ret = 0; | |
1da177e4 LT |
981 | goto abort; |
982 | } | |
983 | ||
984 | *tmp1 = *sb1; | |
985 | *tmp2 = *sb2; | |
986 | ||
987 | /* | |
988 | * nr_disks is not constant | |
989 | */ | |
990 | tmp1->nr_disks = 0; | |
991 | tmp2->nr_disks = 0; | |
992 | ||
ce0c8e05 | 993 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 994 | abort: |
990a8baf JJ |
995 | kfree(tmp1); |
996 | kfree(tmp2); | |
1da177e4 LT |
997 | return ret; |
998 | } | |
999 | ||
4d167f09 N |
1000 | static u32 md_csum_fold(u32 csum) |
1001 | { | |
1002 | csum = (csum & 0xffff) + (csum >> 16); | |
1003 | return (csum & 0xffff) + (csum >> 16); | |
1004 | } | |
1005 | ||
f72ffdd6 | 1006 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 1007 | { |
4d167f09 N |
1008 | u64 newcsum = 0; |
1009 | u32 *sb32 = (u32*)sb; | |
1010 | int i; | |
1da177e4 LT |
1011 | unsigned int disk_csum, csum; |
1012 | ||
1013 | disk_csum = sb->sb_csum; | |
1014 | sb->sb_csum = 0; | |
4d167f09 N |
1015 | |
1016 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1017 | newcsum += sb32[i]; | |
1018 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1019 | ||
4d167f09 N |
1020 | #ifdef CONFIG_ALPHA |
1021 | /* This used to use csum_partial, which was wrong for several | |
1022 | * reasons including that different results are returned on | |
1023 | * different architectures. It isn't critical that we get exactly | |
1024 | * the same return value as before (we always csum_fold before | |
1025 | * testing, and that removes any differences). However as we | |
1026 | * know that csum_partial always returned a 16bit value on | |
1027 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1028 | */ | |
1029 | sb->sb_csum = md_csum_fold(disk_csum); | |
1030 | #else | |
1da177e4 | 1031 | sb->sb_csum = disk_csum; |
4d167f09 | 1032 | #endif |
1da177e4 LT |
1033 | return csum; |
1034 | } | |
1035 | ||
1da177e4 LT |
1036 | /* |
1037 | * Handle superblock details. | |
1038 | * We want to be able to handle multiple superblock formats | |
1039 | * so we have a common interface to them all, and an array of | |
1040 | * different handlers. | |
1041 | * We rely on user-space to write the initial superblock, and support | |
1042 | * reading and updating of superblocks. | |
1043 | * Interface methods are: | |
3cb03002 | 1044 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1045 | * loads and validates a superblock on dev. |
1046 | * if refdev != NULL, compare superblocks on both devices | |
1047 | * Return: | |
1048 | * 0 - dev has a superblock that is compatible with refdev | |
1049 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1050 | * so dev should be used as the refdev in future | |
1051 | * -EINVAL superblock incompatible or invalid | |
1052 | * -othererror e.g. -EIO | |
1053 | * | |
fd01b88c | 1054 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1055 | * Verify that dev is acceptable into mddev. |
1056 | * The first time, mddev->raid_disks will be 0, and data from | |
1057 | * dev should be merged in. Subsequent calls check that dev | |
1058 | * is new enough. Return 0 or -EINVAL | |
1059 | * | |
fd01b88c | 1060 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1061 | * Update the superblock for rdev with data in mddev |
1062 | * This does not write to disc. | |
1063 | * | |
1064 | */ | |
1065 | ||
1066 | struct super_type { | |
0cd17fec CW |
1067 | char *name; |
1068 | struct module *owner; | |
c6563a8c N |
1069 | int (*load_super)(struct md_rdev *rdev, |
1070 | struct md_rdev *refdev, | |
0cd17fec | 1071 | int minor_version); |
c6563a8c N |
1072 | int (*validate_super)(struct mddev *mddev, |
1073 | struct md_rdev *rdev); | |
1074 | void (*sync_super)(struct mddev *mddev, | |
1075 | struct md_rdev *rdev); | |
3cb03002 | 1076 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1077 | sector_t num_sectors); |
c6563a8c N |
1078 | int (*allow_new_offset)(struct md_rdev *rdev, |
1079 | unsigned long long new_offset); | |
1da177e4 LT |
1080 | }; |
1081 | ||
0894cc30 AN |
1082 | /* |
1083 | * Check that the given mddev has no bitmap. | |
1084 | * | |
1085 | * This function is called from the run method of all personalities that do not | |
1086 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1087 | * has a bitmap. Otherwise, it returns 0. | |
1088 | * | |
1089 | */ | |
fd01b88c | 1090 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1091 | { |
c3d9714e | 1092 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1093 | return 0; |
9d48739e | 1094 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1095 | mdname(mddev), mddev->pers->name); |
1096 | return 1; | |
1097 | } | |
1098 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1099 | ||
1da177e4 | 1100 | /* |
f72ffdd6 | 1101 | * load_super for 0.90.0 |
1da177e4 | 1102 | */ |
3cb03002 | 1103 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1104 | { |
1105 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1106 | mdp_super_t *sb; | |
1107 | int ret; | |
1da177e4 LT |
1108 | |
1109 | /* | |
0f420358 | 1110 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1111 | * it's at the end of the disk. |
1112 | * | |
1113 | * It also happens to be a multiple of 4Kb. | |
1114 | */ | |
57b2caa3 | 1115 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1116 | |
0002b271 | 1117 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1118 | if (ret) |
1119 | return ret; | |
1da177e4 LT |
1120 | |
1121 | ret = -EINVAL; | |
1122 | ||
1123 | bdevname(rdev->bdev, b); | |
65a06f06 | 1124 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1125 | |
1126 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1127 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1128 | goto abort; |
1129 | } | |
1130 | ||
1131 | if (sb->major_version != 0 || | |
f6705578 N |
1132 | sb->minor_version < 90 || |
1133 | sb->minor_version > 91) { | |
9d48739e N |
1134 | pr_warn("Bad version number %d.%d on %s\n", |
1135 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1136 | goto abort; |
1137 | } | |
1138 | ||
1139 | if (sb->raid_disks <= 0) | |
1140 | goto abort; | |
1141 | ||
4d167f09 | 1142 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1143 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1144 | goto abort; |
1145 | } | |
1146 | ||
1147 | rdev->preferred_minor = sb->md_minor; | |
1148 | rdev->data_offset = 0; | |
c6563a8c | 1149 | rdev->new_data_offset = 0; |
0002b271 | 1150 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1151 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1152 | |
1153 | if (sb->level == LEVEL_MULTIPATH) | |
1154 | rdev->desc_nr = -1; | |
1155 | else | |
1156 | rdev->desc_nr = sb->this_disk.number; | |
1157 | ||
9a7b2b0f | 1158 | if (!refdev) { |
1da177e4 | 1159 | ret = 1; |
9a7b2b0f | 1160 | } else { |
1da177e4 | 1161 | __u64 ev1, ev2; |
65a06f06 | 1162 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1163 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1164 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1165 | b, bdevname(refdev->bdev,b2)); |
1166 | goto abort; | |
1167 | } | |
e6fd2093 | 1168 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1169 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1170 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1171 | goto abort; |
1172 | } | |
1173 | ev1 = md_event(sb); | |
1174 | ev2 = md_event(refsb); | |
1175 | if (ev1 > ev2) | |
1176 | ret = 1; | |
f72ffdd6 | 1177 | else |
1da177e4 LT |
1178 | ret = 0; |
1179 | } | |
8190e754 | 1180 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1181 | /* Limit to 4TB as metadata cannot record more than that. |
1182 | * (not needed for Linear and RAID0 as metadata doesn't | |
1183 | * record this size) | |
1184 | */ | |
72deb455 | 1185 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1186 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1187 | |
27a7b260 | 1188 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1189 | /* "this cannot possibly happen" ... */ |
1190 | ret = -EINVAL; | |
1191 | ||
1da177e4 LT |
1192 | abort: |
1193 | return ret; | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * validate_super for 0.90.0 | |
1198 | */ | |
fd01b88c | 1199 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1200 | { |
1201 | mdp_disk_t *desc; | |
65a06f06 | 1202 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1203 | __u64 ev1 = md_event(sb); |
1da177e4 | 1204 | |
41158c7e | 1205 | rdev->raid_disk = -1; |
c5d79adb N |
1206 | clear_bit(Faulty, &rdev->flags); |
1207 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1208 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1209 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1210 | |
1da177e4 LT |
1211 | if (mddev->raid_disks == 0) { |
1212 | mddev->major_version = 0; | |
1213 | mddev->minor_version = sb->minor_version; | |
1214 | mddev->patch_version = sb->patch_version; | |
e691063a | 1215 | mddev->external = 0; |
9d8f0363 | 1216 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1217 | mddev->ctime = sb->ctime; |
1218 | mddev->utime = sb->utime; | |
1219 | mddev->level = sb->level; | |
d9d166c2 | 1220 | mddev->clevel[0] = 0; |
1da177e4 LT |
1221 | mddev->layout = sb->layout; |
1222 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1223 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1224 | mddev->events = ev1; |
c3d9714e | 1225 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1226 | mddev->bitmap_info.space = 0; |
1227 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1228 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1229 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1230 | mddev->reshape_backwards = 0; |
1da177e4 | 1231 | |
f6705578 N |
1232 | if (mddev->minor_version >= 91) { |
1233 | mddev->reshape_position = sb->reshape_position; | |
1234 | mddev->delta_disks = sb->delta_disks; | |
1235 | mddev->new_level = sb->new_level; | |
1236 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1237 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1238 | if (mddev->delta_disks < 0) |
1239 | mddev->reshape_backwards = 1; | |
f6705578 N |
1240 | } else { |
1241 | mddev->reshape_position = MaxSector; | |
1242 | mddev->delta_disks = 0; | |
1243 | mddev->new_level = mddev->level; | |
1244 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1245 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 | 1246 | } |
33f2c35a N |
1247 | if (mddev->level == 0) |
1248 | mddev->layout = -1; | |
f6705578 | 1249 | |
1da177e4 LT |
1250 | if (sb->state & (1<<MD_SB_CLEAN)) |
1251 | mddev->recovery_cp = MaxSector; | |
1252 | else { | |
f72ffdd6 | 1253 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1254 | sb->events_lo == sb->cp_events_lo) { |
1255 | mddev->recovery_cp = sb->recovery_cp; | |
1256 | } else | |
1257 | mddev->recovery_cp = 0; | |
1258 | } | |
1259 | ||
1260 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1261 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1262 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1263 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1264 | ||
1265 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1266 | |
1267 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1268 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1269 | mddev->bitmap_info.offset = |
1270 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1271 | mddev->bitmap_info.space = |
c9ad020f | 1272 | mddev->bitmap_info.default_space; |
6409bb05 | 1273 | } |
a654b9d8 | 1274 | |
41158c7e | 1275 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1276 | /* Insist on good event counter while assembling, except |
1277 | * for spares (which don't need an event count) */ | |
1da177e4 | 1278 | ++ev1; |
be6800a7 N |
1279 | if (sb->disks[rdev->desc_nr].state & ( |
1280 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1281 | if (ev1 < mddev->events) |
be6800a7 | 1282 | return -EINVAL; |
41158c7e N |
1283 | } else if (mddev->bitmap) { |
1284 | /* if adding to array with a bitmap, then we can accept an | |
1285 | * older device ... but not too old. | |
1286 | */ | |
41158c7e N |
1287 | if (ev1 < mddev->bitmap->events_cleared) |
1288 | return 0; | |
8313b8e5 N |
1289 | if (ev1 < mddev->events) |
1290 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1291 | } else { |
1292 | if (ev1 < mddev->events) | |
1293 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1294 | return 0; | |
1295 | } | |
41158c7e | 1296 | |
1da177e4 | 1297 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1298 | desc = sb->disks + rdev->desc_nr; |
1299 | ||
1300 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1301 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1302 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1303 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1304 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1305 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1306 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1307 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1308 | /* active but not in sync implies recovery up to | |
1309 | * reshape position. We don't know exactly where | |
1310 | * that is, so set to zero for now */ | |
1311 | if (mddev->minor_version >= 91) { | |
1312 | rdev->recovery_offset = 0; | |
1313 | rdev->raid_disk = desc->raid_disk; | |
1314 | } | |
1da177e4 | 1315 | } |
8ddf9efe N |
1316 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1317 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1318 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1319 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1320 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1321 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1322 | return 0; |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * sync_super for 0.90.0 | |
1327 | */ | |
fd01b88c | 1328 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1329 | { |
1330 | mdp_super_t *sb; | |
3cb03002 | 1331 | struct md_rdev *rdev2; |
1da177e4 | 1332 | int next_spare = mddev->raid_disks; |
19133a42 | 1333 | |
1da177e4 LT |
1334 | /* make rdev->sb match mddev data.. |
1335 | * | |
1336 | * 1/ zero out disks | |
1337 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1338 | * 3/ any empty disks < next_spare become removed | |
1339 | * | |
1340 | * disks[0] gets initialised to REMOVED because | |
1341 | * we cannot be sure from other fields if it has | |
1342 | * been initialised or not. | |
1343 | */ | |
1344 | int i; | |
1345 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1346 | ||
61181565 N |
1347 | rdev->sb_size = MD_SB_BYTES; |
1348 | ||
65a06f06 | 1349 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1350 | |
1351 | memset(sb, 0, sizeof(*sb)); | |
1352 | ||
1353 | sb->md_magic = MD_SB_MAGIC; | |
1354 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1355 | sb->patch_version = mddev->patch_version; |
1356 | sb->gvalid_words = 0; /* ignored */ | |
1357 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1358 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1359 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1360 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1361 | ||
9ebc6ef1 | 1362 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1363 | sb->level = mddev->level; |
58c0fed4 | 1364 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1365 | sb->raid_disks = mddev->raid_disks; |
1366 | sb->md_minor = mddev->md_minor; | |
e691063a | 1367 | sb->not_persistent = 0; |
9ebc6ef1 | 1368 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1369 | sb->state = 0; |
1370 | sb->events_hi = (mddev->events>>32); | |
1371 | sb->events_lo = (u32)mddev->events; | |
1372 | ||
f6705578 N |
1373 | if (mddev->reshape_position == MaxSector) |
1374 | sb->minor_version = 90; | |
1375 | else { | |
1376 | sb->minor_version = 91; | |
1377 | sb->reshape_position = mddev->reshape_position; | |
1378 | sb->new_level = mddev->new_level; | |
1379 | sb->delta_disks = mddev->delta_disks; | |
1380 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1381 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1382 | } |
1383 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1384 | if (mddev->in_sync) |
1385 | { | |
1386 | sb->recovery_cp = mddev->recovery_cp; | |
1387 | sb->cp_events_hi = (mddev->events>>32); | |
1388 | sb->cp_events_lo = (u32)mddev->events; | |
1389 | if (mddev->recovery_cp == MaxSector) | |
1390 | sb->state = (1<< MD_SB_CLEAN); | |
1391 | } else | |
1392 | sb->recovery_cp = 0; | |
1393 | ||
1394 | sb->layout = mddev->layout; | |
9d8f0363 | 1395 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1396 | |
c3d9714e | 1397 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1398 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1399 | ||
1da177e4 | 1400 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1401 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1402 | mdp_disk_t *d; |
86e6ffdd | 1403 | int desc_nr; |
0261cd9f N |
1404 | int is_active = test_bit(In_sync, &rdev2->flags); |
1405 | ||
1406 | if (rdev2->raid_disk >= 0 && | |
1407 | sb->minor_version >= 91) | |
1408 | /* we have nowhere to store the recovery_offset, | |
1409 | * but if it is not below the reshape_position, | |
1410 | * we can piggy-back on that. | |
1411 | */ | |
1412 | is_active = 1; | |
1413 | if (rdev2->raid_disk < 0 || | |
1414 | test_bit(Faulty, &rdev2->flags)) | |
1415 | is_active = 0; | |
1416 | if (is_active) | |
86e6ffdd | 1417 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1418 | else |
86e6ffdd | 1419 | desc_nr = next_spare++; |
19133a42 | 1420 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1421 | d = &sb->disks[rdev2->desc_nr]; |
1422 | nr_disks++; | |
1423 | d->number = rdev2->desc_nr; | |
1424 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1425 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1426 | if (is_active) |
1da177e4 LT |
1427 | d->raid_disk = rdev2->raid_disk; |
1428 | else | |
1429 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1430 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1431 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1432 | else if (is_active) { |
1da177e4 | 1433 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1434 | if (test_bit(In_sync, &rdev2->flags)) |
1435 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1436 | active++; |
1437 | working++; | |
1438 | } else { | |
1439 | d->state = 0; | |
1440 | spare++; | |
1441 | working++; | |
1442 | } | |
8ddf9efe N |
1443 | if (test_bit(WriteMostly, &rdev2->flags)) |
1444 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1445 | if (test_bit(FailFast, &rdev2->flags)) |
1446 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1447 | } |
1da177e4 LT |
1448 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1449 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1450 | mdp_disk_t *d = &sb->disks[i]; | |
1451 | if (d->state == 0 && d->number == 0) { | |
1452 | d->number = i; | |
1453 | d->raid_disk = i; | |
1454 | d->state = (1<<MD_DISK_REMOVED); | |
1455 | d->state |= (1<<MD_DISK_FAULTY); | |
1456 | failed++; | |
1457 | } | |
1458 | } | |
1459 | sb->nr_disks = nr_disks; | |
1460 | sb->active_disks = active; | |
1461 | sb->working_disks = working; | |
1462 | sb->failed_disks = failed; | |
1463 | sb->spare_disks = spare; | |
1464 | ||
1465 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1466 | sb->sb_csum = calc_sb_csum(sb); | |
1467 | } | |
1468 | ||
0cd17fec CW |
1469 | /* |
1470 | * rdev_size_change for 0.90.0 | |
1471 | */ | |
1472 | static unsigned long long | |
3cb03002 | 1473 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1474 | { |
58c0fed4 | 1475 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1476 | return 0; /* component must fit device */ |
c3d9714e | 1477 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1478 | return 0; /* can't move bitmap */ |
57b2caa3 | 1479 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1480 | if (!num_sectors || num_sectors > rdev->sb_start) |
1481 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1482 | /* Limit to 4TB as metadata cannot record more than that. |
1483 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1484 | */ | |
72deb455 | 1485 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1486 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1487 | do { |
1488 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1489 | rdev->sb_page); |
46533ff7 | 1490 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1491 | return num_sectors; |
0cd17fec CW |
1492 | } |
1493 | ||
c6563a8c N |
1494 | static int |
1495 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1496 | { | |
1497 | /* non-zero offset changes not possible with v0.90 */ | |
1498 | return new_offset == 0; | |
1499 | } | |
0cd17fec | 1500 | |
1da177e4 LT |
1501 | /* |
1502 | * version 1 superblock | |
1503 | */ | |
1504 | ||
f72ffdd6 | 1505 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1506 | { |
1c05b4bc N |
1507 | __le32 disk_csum; |
1508 | u32 csum; | |
1da177e4 LT |
1509 | unsigned long long newcsum; |
1510 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1511 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1512 | |
1513 | disk_csum = sb->sb_csum; | |
1514 | sb->sb_csum = 0; | |
1515 | newcsum = 0; | |
1f3c9907 | 1516 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1517 | newcsum += le32_to_cpu(*isuper++); |
1518 | ||
1519 | if (size == 2) | |
1c05b4bc | 1520 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1521 | |
1522 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1523 | sb->sb_csum = disk_csum; | |
1524 | return cpu_to_le32(csum); | |
1525 | } | |
1526 | ||
3cb03002 | 1527 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1528 | { |
1529 | struct mdp_superblock_1 *sb; | |
1530 | int ret; | |
0f420358 | 1531 | sector_t sb_start; |
c6563a8c | 1532 | sector_t sectors; |
1da177e4 | 1533 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1534 | int bmask; |
1da177e4 LT |
1535 | |
1536 | /* | |
0f420358 | 1537 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1538 | * It is always aligned to a 4K boundary and |
1539 | * depeding on minor_version, it can be: | |
1540 | * 0: At least 8K, but less than 12K, from end of device | |
1541 | * 1: At start of device | |
1542 | * 2: 4K from start of device. | |
1543 | */ | |
1544 | switch(minor_version) { | |
1545 | case 0: | |
77304d2a | 1546 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1547 | sb_start -= 8*2; |
1548 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1549 | break; |
1550 | case 1: | |
0f420358 | 1551 | sb_start = 0; |
1da177e4 LT |
1552 | break; |
1553 | case 2: | |
0f420358 | 1554 | sb_start = 8; |
1da177e4 LT |
1555 | break; |
1556 | default: | |
1557 | return -EINVAL; | |
1558 | } | |
0f420358 | 1559 | rdev->sb_start = sb_start; |
1da177e4 | 1560 | |
0002b271 N |
1561 | /* superblock is rarely larger than 1K, but it can be larger, |
1562 | * and it is safe to read 4k, so we do that | |
1563 | */ | |
1564 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1565 | if (ret) return ret; |
1566 | ||
65a06f06 | 1567 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1568 | |
1569 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1570 | sb->major_version != cpu_to_le32(1) || | |
1571 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1572 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1573 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1574 | return -EINVAL; |
1575 | ||
1576 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1577 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1578 | bdevname(rdev->bdev,b)); |
1579 | return -EINVAL; | |
1580 | } | |
1581 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1582 | pr_warn("md: data_size too small on %s\n", |
1583 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1584 | return -EINVAL; |
1585 | } | |
c6563a8c N |
1586 | if (sb->pad0 || |
1587 | sb->pad3[0] || | |
1588 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1589 | /* Some padding is non-zero, might be a new feature */ | |
1590 | return -EINVAL; | |
e11e93fa | 1591 | |
1da177e4 LT |
1592 | rdev->preferred_minor = 0xffff; |
1593 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1594 | rdev->new_data_offset = rdev->data_offset; |
1595 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1596 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1597 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1598 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1599 | |
0002b271 | 1600 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1601 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1602 | if (rdev->sb_size & bmask) |
a1801f85 N |
1603 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1604 | ||
1605 | if (minor_version | |
0f420358 | 1606 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1607 | return -EINVAL; |
c6563a8c N |
1608 | if (minor_version |
1609 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1610 | return -EINVAL; | |
0002b271 | 1611 | |
31b65a0d N |
1612 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1613 | rdev->desc_nr = -1; | |
1614 | else | |
1615 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1616 | ||
2699b672 N |
1617 | if (!rdev->bb_page) { |
1618 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1619 | if (!rdev->bb_page) | |
1620 | return -ENOMEM; | |
1621 | } | |
1622 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1623 | rdev->badblocks.count == 0) { | |
1624 | /* need to load the bad block list. | |
1625 | * Currently we limit it to one page. | |
1626 | */ | |
1627 | s32 offset; | |
1628 | sector_t bb_sector; | |
00485d09 | 1629 | __le64 *bbp; |
2699b672 N |
1630 | int i; |
1631 | int sectors = le16_to_cpu(sb->bblog_size); | |
1632 | if (sectors > (PAGE_SIZE / 512)) | |
1633 | return -EINVAL; | |
1634 | offset = le32_to_cpu(sb->bblog_offset); | |
1635 | if (offset == 0) | |
1636 | return -EINVAL; | |
1637 | bb_sector = (long long)offset; | |
1638 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1639 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1640 | return -EIO; |
00485d09 | 1641 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1642 | rdev->badblocks.shift = sb->bblog_shift; |
1643 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1644 | u64 bb = le64_to_cpu(*bbp); | |
1645 | int count = bb & (0x3ff); | |
1646 | u64 sector = bb >> 10; | |
1647 | sector <<= sb->bblog_shift; | |
1648 | count <<= sb->bblog_shift; | |
1649 | if (bb + 1 == 0) | |
1650 | break; | |
fc974ee2 | 1651 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1652 | return -EINVAL; |
1653 | } | |
486adf72 N |
1654 | } else if (sb->bblog_offset != 0) |
1655 | rdev->badblocks.shift = 0; | |
2699b672 | 1656 | |
ddc08823 PB |
1657 | if ((le32_to_cpu(sb->feature_map) & |
1658 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1659 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1660 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1661 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1662 | } | |
1663 | ||
33f2c35a N |
1664 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT) && |
1665 | sb->level != 0) | |
1666 | return -EINVAL; | |
1667 | ||
9a7b2b0f | 1668 | if (!refdev) { |
8ed75463 | 1669 | ret = 1; |
9a7b2b0f | 1670 | } else { |
1da177e4 | 1671 | __u64 ev1, ev2; |
65a06f06 | 1672 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1673 | |
1674 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1675 | sb->level != refsb->level || | |
1676 | sb->layout != refsb->layout || | |
1677 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1678 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1679 | bdevname(rdev->bdev,b), |
1680 | bdevname(refdev->bdev,b2)); | |
1681 | return -EINVAL; | |
1682 | } | |
1683 | ev1 = le64_to_cpu(sb->events); | |
1684 | ev2 = le64_to_cpu(refsb->events); | |
1685 | ||
1686 | if (ev1 > ev2) | |
8ed75463 N |
1687 | ret = 1; |
1688 | else | |
1689 | ret = 0; | |
1da177e4 | 1690 | } |
c6563a8c N |
1691 | if (minor_version) { |
1692 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1693 | sectors -= rdev->data_offset; | |
1694 | } else | |
1695 | sectors = rdev->sb_start; | |
1696 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1697 | return -EINVAL; |
dd8ac336 | 1698 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1699 | return ret; |
1da177e4 LT |
1700 | } |
1701 | ||
fd01b88c | 1702 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1703 | { |
65a06f06 | 1704 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1705 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1706 | |
41158c7e | 1707 | rdev->raid_disk = -1; |
c5d79adb N |
1708 | clear_bit(Faulty, &rdev->flags); |
1709 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1710 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1711 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1712 | |
1da177e4 LT |
1713 | if (mddev->raid_disks == 0) { |
1714 | mddev->major_version = 1; | |
1715 | mddev->patch_version = 0; | |
e691063a | 1716 | mddev->external = 0; |
9d8f0363 | 1717 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1718 | mddev->ctime = le64_to_cpu(sb->ctime); |
1719 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1720 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1721 | mddev->clevel[0] = 0; |
1da177e4 LT |
1722 | mddev->layout = le32_to_cpu(sb->layout); |
1723 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1724 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1725 | mddev->events = ev1; |
c3d9714e | 1726 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1727 | mddev->bitmap_info.space = 0; |
1728 | /* Default location for bitmap is 1K after superblock | |
1729 | * using 3K - total of 4K | |
1730 | */ | |
c3d9714e | 1731 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1732 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1733 | mddev->reshape_backwards = 0; |
1734 | ||
1da177e4 LT |
1735 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1736 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1737 | ||
1738 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1739 | |
71c0805c | 1740 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1741 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1742 | mddev->bitmap_info.offset = |
1743 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1744 | /* Metadata doesn't record how much space is available. |
1745 | * For 1.0, we assume we can use up to the superblock | |
1746 | * if before, else to 4K beyond superblock. | |
1747 | * For others, assume no change is possible. | |
1748 | */ | |
1749 | if (mddev->minor_version > 0) | |
1750 | mddev->bitmap_info.space = 0; | |
1751 | else if (mddev->bitmap_info.offset > 0) | |
1752 | mddev->bitmap_info.space = | |
1753 | 8 - mddev->bitmap_info.offset; | |
1754 | else | |
1755 | mddev->bitmap_info.space = | |
1756 | -mddev->bitmap_info.offset; | |
1757 | } | |
e11e93fa | 1758 | |
f6705578 N |
1759 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1760 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1761 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1762 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1763 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1764 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1765 | if (mddev->delta_disks < 0 || |
1766 | (mddev->delta_disks == 0 && | |
1767 | (le32_to_cpu(sb->feature_map) | |
1768 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1769 | mddev->reshape_backwards = 1; | |
f6705578 N |
1770 | } else { |
1771 | mddev->reshape_position = MaxSector; | |
1772 | mddev->delta_disks = 0; | |
1773 | mddev->new_level = mddev->level; | |
1774 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1775 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1776 | } |
1777 | ||
33f2c35a N |
1778 | if (mddev->level == 0 && |
1779 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RAID0_LAYOUT)) | |
1780 | mddev->layout = -1; | |
1781 | ||
486b0f7b | 1782 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1783 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1784 | |
ddc08823 PB |
1785 | if (le32_to_cpu(sb->feature_map) & |
1786 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1787 | if (le32_to_cpu(sb->feature_map) & |
1788 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1789 | return -EINVAL; | |
ddc08823 PB |
1790 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1791 | (le32_to_cpu(sb->feature_map) & | |
1792 | MD_FEATURE_MULTIPLE_PPLS)) | |
1793 | return -EINVAL; | |
ea0213e0 AP |
1794 | set_bit(MD_HAS_PPL, &mddev->flags); |
1795 | } | |
41158c7e | 1796 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1797 | /* Insist of good event counter while assembling, except for |
1798 | * spares (which don't need an event count) */ | |
1da177e4 | 1799 | ++ev1; |
be6800a7 N |
1800 | if (rdev->desc_nr >= 0 && |
1801 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1802 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1803 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1804 | if (ev1 < mddev->events) |
1805 | return -EINVAL; | |
41158c7e N |
1806 | } else if (mddev->bitmap) { |
1807 | /* If adding to array with a bitmap, then we can accept an | |
1808 | * older device, but not too old. | |
1809 | */ | |
41158c7e N |
1810 | if (ev1 < mddev->bitmap->events_cleared) |
1811 | return 0; | |
8313b8e5 N |
1812 | if (ev1 < mddev->events) |
1813 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1814 | } else { |
1815 | if (ev1 < mddev->events) | |
1816 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1817 | return 0; | |
1818 | } | |
1da177e4 LT |
1819 | if (mddev->level != LEVEL_MULTIPATH) { |
1820 | int role; | |
3673f305 N |
1821 | if (rdev->desc_nr < 0 || |
1822 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1823 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1824 | rdev->desc_nr = -1; |
1825 | } else | |
1826 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1827 | switch(role) { |
c4d4c91b | 1828 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1829 | break; |
c4d4c91b | 1830 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1831 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1832 | break; |
bac624f3 SL |
1833 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1834 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1835 | /* journal device without journal feature */ | |
9d48739e | 1836 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1837 | return -EINVAL; |
1838 | } | |
1839 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1840 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1841 | rdev->raid_disk = 0; |
bac624f3 | 1842 | break; |
1da177e4 | 1843 | default: |
f466722c | 1844 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1845 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1846 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1847 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1848 | if (!(le32_to_cpu(sb->feature_map) & |
1849 | MD_FEATURE_RECOVERY_BITMAP)) | |
1850 | rdev->saved_raid_disk = -1; | |
062f5b2a GJ |
1851 | } else { |
1852 | /* | |
1853 | * If the array is FROZEN, then the device can't | |
1854 | * be in_sync with rest of array. | |
1855 | */ | |
1856 | if (!test_bit(MD_RECOVERY_FROZEN, | |
1857 | &mddev->recovery)) | |
1858 | set_bit(In_sync, &rdev->flags); | |
1859 | } | |
1da177e4 LT |
1860 | rdev->raid_disk = role; |
1861 | break; | |
1862 | } | |
8ddf9efe N |
1863 | if (sb->devflags & WriteMostly1) |
1864 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1865 | if (sb->devflags & FailFast1) |
1866 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1867 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1868 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1869 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1870 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1871 | |
1da177e4 LT |
1872 | return 0; |
1873 | } | |
1874 | ||
fd01b88c | 1875 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1876 | { |
1877 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1878 | struct md_rdev *rdev2; |
1da177e4 LT |
1879 | int max_dev, i; |
1880 | /* make rdev->sb match mddev and rdev data. */ | |
1881 | ||
65a06f06 | 1882 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1883 | |
1884 | sb->feature_map = 0; | |
1885 | sb->pad0 = 0; | |
5fd6c1dc | 1886 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1887 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1888 | ||
1889 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1890 | sb->events = cpu_to_le64(mddev->events); | |
1891 | if (mddev->in_sync) | |
1892 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1893 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1894 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1895 | else |
1896 | sb->resync_offset = cpu_to_le64(0); | |
1897 | ||
1c05b4bc | 1898 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1899 | |
f0ca340c | 1900 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1901 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1902 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1903 | sb->level = cpu_to_le32(mddev->level); |
1904 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1905 | if (test_bit(FailFast, &rdev->flags)) |
1906 | sb->devflags |= FailFast1; | |
1907 | else | |
1908 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1909 | |
aeb9b211 N |
1910 | if (test_bit(WriteMostly, &rdev->flags)) |
1911 | sb->devflags |= WriteMostly1; | |
1912 | else | |
1913 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1914 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1915 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1916 | |
c3d9714e N |
1917 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1918 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1919 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1920 | } |
5fd6c1dc | 1921 | |
f2076e7d | 1922 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1923 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1924 | sb->feature_map |= |
1925 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1926 | sb->recovery_offset = | |
1927 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1928 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1929 | sb->feature_map |= | |
1930 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1931 | } |
3069aa8d SL |
1932 | /* Note: recovery_offset and journal_tail share space */ |
1933 | if (test_bit(Journal, &rdev->flags)) | |
1934 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1935 | if (test_bit(Replacement, &rdev->flags)) |
1936 | sb->feature_map |= | |
1937 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1938 | |
f6705578 N |
1939 | if (mddev->reshape_position != MaxSector) { |
1940 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1941 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1942 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1943 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1944 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1945 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1946 | if (mddev->delta_disks == 0 && |
1947 | mddev->reshape_backwards) | |
1948 | sb->feature_map | |
1949 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1950 | if (rdev->new_data_offset != rdev->data_offset) { |
1951 | sb->feature_map | |
1952 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1953 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1954 | - rdev->data_offset)); | |
1955 | } | |
f6705578 | 1956 | } |
a654b9d8 | 1957 | |
3c462c88 GR |
1958 | if (mddev_is_clustered(mddev)) |
1959 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1960 | ||
2699b672 N |
1961 | if (rdev->badblocks.count == 0) |
1962 | /* Nothing to do for bad blocks*/ ; | |
1963 | else if (sb->bblog_offset == 0) | |
1964 | /* Cannot record bad blocks on this device */ | |
1965 | md_error(mddev, rdev); | |
1966 | else { | |
1967 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 1968 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1969 | u64 *p = bb->page; |
1970 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1971 | if (bb->changed) { | |
1972 | unsigned seq; | |
1973 | ||
1974 | retry: | |
1975 | seq = read_seqbegin(&bb->lock); | |
1976 | ||
1977 | memset(bbp, 0xff, PAGE_SIZE); | |
1978 | ||
1979 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1980 | u64 internal_bb = p[i]; |
2699b672 N |
1981 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1982 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1983 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1984 | } |
d0962936 | 1985 | bb->changed = 0; |
2699b672 N |
1986 | if (read_seqretry(&bb->lock, seq)) |
1987 | goto retry; | |
1988 | ||
1989 | bb->sector = (rdev->sb_start + | |
1990 | (int)le32_to_cpu(sb->bblog_offset)); | |
1991 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1992 | } |
1993 | } | |
1994 | ||
1da177e4 | 1995 | max_dev = 0; |
dafb20fa | 1996 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1997 | if (rdev2->desc_nr+1 > max_dev) |
1998 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1999 | |
70471daf N |
2000 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
2001 | int bmask; | |
a778b73f | 2002 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
2003 | rdev->sb_size = max_dev * 2 + 256; |
2004 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
2005 | if (rdev->sb_size & bmask) | |
2006 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
2007 | } else |
2008 | max_dev = le32_to_cpu(sb->max_dev); | |
2009 | ||
1da177e4 | 2010 | for (i=0; i<max_dev;i++) |
8df72024 | 2011 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 2012 | |
a97b7896 SL |
2013 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
2014 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 2015 | |
ea0213e0 | 2016 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
2017 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
2018 | sb->feature_map |= | |
2019 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
2020 | else | |
2021 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
2022 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
2023 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
2024 | } | |
2025 | ||
dafb20fa | 2026 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 2027 | i = rdev2->desc_nr; |
b2d444d7 | 2028 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2029 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2030 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2031 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2032 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2033 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2034 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2035 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2036 | else |
c4d4c91b | 2037 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2038 | } |
2039 | ||
1da177e4 LT |
2040 | sb->sb_csum = calc_sb_1_csum(sb); |
2041 | } | |
2042 | ||
0cd17fec | 2043 | static unsigned long long |
3cb03002 | 2044 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2045 | { |
2046 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2047 | sector_t max_sectors; |
58c0fed4 | 2048 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2049 | return 0; /* component must fit device */ |
c6563a8c N |
2050 | if (rdev->data_offset != rdev->new_data_offset) |
2051 | return 0; /* too confusing */ | |
0f420358 | 2052 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2053 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2054 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2055 | max_sectors -= rdev->data_offset; |
2056 | if (!num_sectors || num_sectors > max_sectors) | |
2057 | num_sectors = max_sectors; | |
c3d9714e | 2058 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2059 | /* minor version 0 with bitmap we can't move */ |
2060 | return 0; | |
2061 | } else { | |
2062 | /* minor version 0; superblock after data */ | |
0f420358 | 2063 | sector_t sb_start; |
77304d2a | 2064 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 2065 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 2066 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
2067 | if (!num_sectors || num_sectors > max_sectors) |
2068 | num_sectors = max_sectors; | |
0f420358 | 2069 | rdev->sb_start = sb_start; |
0cd17fec | 2070 | } |
65a06f06 | 2071 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2072 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2073 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2074 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2075 | do { |
2076 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2077 | rdev->sb_page); | |
2078 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2079 | return num_sectors; |
c6563a8c N |
2080 | |
2081 | } | |
2082 | ||
2083 | static int | |
2084 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2085 | unsigned long long new_offset) | |
2086 | { | |
2087 | /* All necessary checks on new >= old have been done */ | |
2088 | struct bitmap *bitmap; | |
2089 | if (new_offset >= rdev->data_offset) | |
2090 | return 1; | |
2091 | ||
2092 | /* with 1.0 metadata, there is no metadata to tread on | |
2093 | * so we can always move back */ | |
2094 | if (rdev->mddev->minor_version == 0) | |
2095 | return 1; | |
2096 | ||
2097 | /* otherwise we must be sure not to step on | |
2098 | * any metadata, so stay: | |
2099 | * 36K beyond start of superblock | |
2100 | * beyond end of badblocks | |
2101 | * beyond write-intent bitmap | |
2102 | */ | |
2103 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2104 | return 0; | |
2105 | bitmap = rdev->mddev->bitmap; | |
2106 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2107 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2108 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2109 | return 0; |
2110 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2111 | return 0; | |
2112 | ||
2113 | return 1; | |
0cd17fec | 2114 | } |
1da177e4 | 2115 | |
75c96f85 | 2116 | static struct super_type super_types[] = { |
1da177e4 LT |
2117 | [0] = { |
2118 | .name = "0.90.0", | |
2119 | .owner = THIS_MODULE, | |
0cd17fec CW |
2120 | .load_super = super_90_load, |
2121 | .validate_super = super_90_validate, | |
2122 | .sync_super = super_90_sync, | |
2123 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2124 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2125 | }, |
2126 | [1] = { | |
2127 | .name = "md-1", | |
2128 | .owner = THIS_MODULE, | |
0cd17fec CW |
2129 | .load_super = super_1_load, |
2130 | .validate_super = super_1_validate, | |
2131 | .sync_super = super_1_sync, | |
2132 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2133 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2134 | }, |
2135 | }; | |
1da177e4 | 2136 | |
fd01b88c | 2137 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2138 | { |
2139 | if (mddev->sync_super) { | |
2140 | mddev->sync_super(mddev, rdev); | |
2141 | return; | |
2142 | } | |
2143 | ||
2144 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2145 | ||
2146 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2147 | } | |
2148 | ||
fd01b88c | 2149 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2150 | { |
3cb03002 | 2151 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2152 | |
4b80991c | 2153 | rcu_read_lock(); |
0b020e85 SL |
2154 | rdev_for_each_rcu(rdev, mddev1) { |
2155 | if (test_bit(Faulty, &rdev->flags) || | |
2156 | test_bit(Journal, &rdev->flags) || | |
2157 | rdev->raid_disk == -1) | |
2158 | continue; | |
2159 | rdev_for_each_rcu(rdev2, mddev2) { | |
2160 | if (test_bit(Faulty, &rdev2->flags) || | |
2161 | test_bit(Journal, &rdev2->flags) || | |
2162 | rdev2->raid_disk == -1) | |
2163 | continue; | |
7dd5e7c3 | 2164 | if (rdev->bdev->bd_contains == |
4b80991c N |
2165 | rdev2->bdev->bd_contains) { |
2166 | rcu_read_unlock(); | |
7dd5e7c3 | 2167 | return 1; |
4b80991c | 2168 | } |
0b020e85 SL |
2169 | } |
2170 | } | |
4b80991c | 2171 | rcu_read_unlock(); |
1da177e4 LT |
2172 | return 0; |
2173 | } | |
2174 | ||
2175 | static LIST_HEAD(pending_raid_disks); | |
2176 | ||
ac5e7113 AN |
2177 | /* |
2178 | * Try to register data integrity profile for an mddev | |
2179 | * | |
2180 | * This is called when an array is started and after a disk has been kicked | |
2181 | * from the array. It only succeeds if all working and active component devices | |
2182 | * are integrity capable with matching profiles. | |
2183 | */ | |
fd01b88c | 2184 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2185 | { |
3cb03002 | 2186 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2187 | |
2188 | if (list_empty(&mddev->disks)) | |
2189 | return 0; /* nothing to do */ | |
629acb6a JB |
2190 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2191 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2192 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2193 | /* skip spares and non-functional disks */ |
2194 | if (test_bit(Faulty, &rdev->flags)) | |
2195 | continue; | |
2196 | if (rdev->raid_disk < 0) | |
2197 | continue; | |
ac5e7113 AN |
2198 | if (!reference) { |
2199 | /* Use the first rdev as the reference */ | |
2200 | reference = rdev; | |
2201 | continue; | |
2202 | } | |
2203 | /* does this rdev's profile match the reference profile? */ | |
2204 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2205 | rdev->bdev->bd_disk) < 0) | |
2206 | return -EINVAL; | |
2207 | } | |
89078d57 MP |
2208 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2209 | return 0; | |
ac5e7113 AN |
2210 | /* |
2211 | * All component devices are integrity capable and have matching | |
2212 | * profiles, register the common profile for the md device. | |
2213 | */ | |
25520d55 MP |
2214 | blk_integrity_register(mddev->gendisk, |
2215 | bdev_get_integrity(reference->bdev)); | |
2216 | ||
9d48739e | 2217 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2218 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2219 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2220 | mdname(mddev)); |
2221 | return -EINVAL; | |
2222 | } | |
ac5e7113 AN |
2223 | return 0; |
2224 | } | |
2225 | EXPORT_SYMBOL(md_integrity_register); | |
2226 | ||
1501efad DW |
2227 | /* |
2228 | * Attempt to add an rdev, but only if it is consistent with the current | |
2229 | * integrity profile | |
2230 | */ | |
2231 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2232 | { |
2863b9eb | 2233 | struct blk_integrity *bi_mddev; |
1501efad | 2234 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2235 | |
2236 | if (!mddev->gendisk) | |
1501efad | 2237 | return 0; |
2863b9eb | 2238 | |
2863b9eb | 2239 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2240 | |
ac5e7113 | 2241 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2242 | return 0; |
2243 | ||
2244 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2245 | pr_err("%s: incompatible integrity profile for %s\n", |
2246 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2247 | return -ENXIO; |
2248 | } | |
2249 | ||
2250 | return 0; | |
3f9d99c1 | 2251 | } |
ac5e7113 | 2252 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2253 | |
f72ffdd6 | 2254 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2255 | { |
7dd5e7c3 | 2256 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2257 | struct kobject *ko; |
5e55e2f5 | 2258 | int err; |
1da177e4 | 2259 | |
11e2ede0 DW |
2260 | /* prevent duplicates */ |
2261 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2262 | return -EEXIST; | |
2263 | ||
97b20ef7 N |
2264 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2265 | mddev->pers) | |
2266 | return -EROFS; | |
2267 | ||
dd8ac336 | 2268 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2269 | if (!test_bit(Journal, &rdev->flags) && |
2270 | rdev->sectors && | |
2271 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2272 | if (mddev->pers) { |
2273 | /* Cannot change size, so fail | |
2274 | * If mddev->level <= 0, then we don't care | |
2275 | * about aligning sizes (e.g. linear) | |
2276 | */ | |
2277 | if (mddev->level > 0) | |
2278 | return -ENOSPC; | |
2279 | } else | |
dd8ac336 | 2280 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2281 | } |
1da177e4 LT |
2282 | |
2283 | /* Verify rdev->desc_nr is unique. | |
2284 | * If it is -1, assign a free number, else | |
2285 | * check number is not in use | |
2286 | */ | |
4878e9eb | 2287 | rcu_read_lock(); |
1da177e4 LT |
2288 | if (rdev->desc_nr < 0) { |
2289 | int choice = 0; | |
4878e9eb N |
2290 | if (mddev->pers) |
2291 | choice = mddev->raid_disks; | |
57d051dc | 2292 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2293 | choice++; |
2294 | rdev->desc_nr = choice; | |
2295 | } else { | |
57d051dc | 2296 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2297 | rcu_read_unlock(); |
1da177e4 | 2298 | return -EBUSY; |
4878e9eb | 2299 | } |
1da177e4 | 2300 | } |
4878e9eb | 2301 | rcu_read_unlock(); |
f6b6ec5c SL |
2302 | if (!test_bit(Journal, &rdev->flags) && |
2303 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2304 | pr_warn("md: %s: array is limited to %d devices\n", |
2305 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2306 | return -EBUSY; |
2307 | } | |
19133a42 | 2308 | bdevname(rdev->bdev,b); |
90a9befb | 2309 | strreplace(b, '/', '!'); |
649316b2 | 2310 | |
1da177e4 | 2311 | rdev->mddev = mddev; |
9d48739e | 2312 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2313 | |
963c555e GJ |
2314 | if (mddev->raid_disks) |
2315 | mddev_create_wb_pool(mddev, rdev, false); | |
2316 | ||
b2d6db58 | 2317 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2318 | goto fail; |
86e6ffdd | 2319 | |
0762b8bd | 2320 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2321 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2322 | /* failure here is OK */; | |
2323 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2324 | |
4b80991c | 2325 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2326 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2327 | |
2328 | /* May as well allow recovery to be retried once */ | |
5389042f | 2329 | mddev->recovery_disabled++; |
3f9d99c1 | 2330 | |
1da177e4 | 2331 | return 0; |
5e55e2f5 N |
2332 | |
2333 | fail: | |
9d48739e N |
2334 | pr_warn("md: failed to register dev-%s for %s\n", |
2335 | b, mdname(mddev)); | |
5e55e2f5 | 2336 | return err; |
1da177e4 LT |
2337 | } |
2338 | ||
177a99b2 | 2339 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2340 | { |
3cb03002 | 2341 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2342 | kobject_del(&rdev->kobj); |
177a99b2 | 2343 | kobject_put(&rdev->kobj); |
5792a285 N |
2344 | } |
2345 | ||
f72ffdd6 | 2346 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2347 | { |
2348 | char b[BDEVNAME_SIZE]; | |
403df478 | 2349 | |
49731baa | 2350 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2351 | list_del_rcu(&rdev->same_set); |
9d48739e | 2352 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
963c555e | 2353 | mddev_destroy_wb_pool(rdev->mddev, rdev); |
1da177e4 | 2354 | rdev->mddev = NULL; |
86e6ffdd | 2355 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2356 | sysfs_put(rdev->sysfs_state); |
2357 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2358 | rdev->badblocks.count = 0; |
5792a285 | 2359 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2360 | * writing to 'remove' to "dev/state". We also need |
2361 | * to delay it due to rcu usage. | |
5792a285 | 2362 | */ |
4b80991c | 2363 | synchronize_rcu(); |
177a99b2 N |
2364 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2365 | kobject_get(&rdev->kobj); | |
e804ac78 | 2366 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2367 | } |
2368 | ||
2369 | /* | |
2370 | * prevent the device from being mounted, repartitioned or | |
2371 | * otherwise reused by a RAID array (or any other kernel | |
2372 | * subsystem), by bd_claiming the device. | |
2373 | */ | |
3cb03002 | 2374 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2375 | { |
2376 | int err = 0; | |
2377 | struct block_device *bdev; | |
2378 | char b[BDEVNAME_SIZE]; | |
2379 | ||
d4d77629 | 2380 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2381 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2382 | if (IS_ERR(bdev)) { |
9d48739e | 2383 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2384 | return PTR_ERR(bdev); |
2385 | } | |
1da177e4 LT |
2386 | rdev->bdev = bdev; |
2387 | return err; | |
2388 | } | |
2389 | ||
3cb03002 | 2390 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2391 | { |
2392 | struct block_device *bdev = rdev->bdev; | |
2393 | rdev->bdev = NULL; | |
e525fd89 | 2394 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2395 | } |
2396 | ||
2397 | void md_autodetect_dev(dev_t dev); | |
2398 | ||
f72ffdd6 | 2399 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2400 | { |
2401 | char b[BDEVNAME_SIZE]; | |
403df478 | 2402 | |
9d48739e | 2403 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2404 | md_rdev_clear(rdev); |
1da177e4 | 2405 | #ifndef MODULE |
d0fae18f N |
2406 | if (test_bit(AutoDetected, &rdev->flags)) |
2407 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2408 | #endif |
2409 | unlock_rdev(rdev); | |
86e6ffdd | 2410 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2411 | } |
2412 | ||
fb56dfef | 2413 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2414 | { |
2415 | unbind_rdev_from_array(rdev); | |
2416 | export_rdev(rdev); | |
2417 | } | |
fb56dfef | 2418 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2419 | |
fd01b88c | 2420 | static void export_array(struct mddev *mddev) |
1da177e4 | 2421 | { |
0638bb0e | 2422 | struct md_rdev *rdev; |
1da177e4 | 2423 | |
0638bb0e N |
2424 | while (!list_empty(&mddev->disks)) { |
2425 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2426 | same_set); | |
fb56dfef | 2427 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2428 | } |
1da177e4 LT |
2429 | mddev->raid_disks = 0; |
2430 | mddev->major_version = 0; | |
2431 | } | |
2432 | ||
6497709b N |
2433 | static bool set_in_sync(struct mddev *mddev) |
2434 | { | |
efa4b77b | 2435 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2436 | if (!mddev->in_sync) { |
2437 | mddev->sync_checkers++; | |
2438 | spin_unlock(&mddev->lock); | |
2439 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2440 | spin_lock(&mddev->lock); | |
2441 | if (!mddev->in_sync && | |
2442 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2443 | mddev->in_sync = 1; |
4ad23a97 N |
2444 | /* |
2445 | * Ensure ->in_sync is visible before we clear | |
2446 | * ->sync_checkers. | |
2447 | */ | |
55cc39f3 | 2448 | smp_mb(); |
6497709b N |
2449 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2450 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2451 | } | |
4ad23a97 N |
2452 | if (--mddev->sync_checkers == 0) |
2453 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2454 | } |
2455 | if (mddev->safemode == 1) | |
2456 | mddev->safemode = 0; | |
2457 | return mddev->in_sync; | |
2458 | } | |
2459 | ||
f72ffdd6 | 2460 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2461 | { |
42543769 N |
2462 | /* Update each superblock (in-memory image), but |
2463 | * if we are allowed to, skip spares which already | |
2464 | * have the right event counter, or have one earlier | |
2465 | * (which would mean they aren't being marked as dirty | |
2466 | * with the rest of the array) | |
2467 | */ | |
3cb03002 | 2468 | struct md_rdev *rdev; |
dafb20fa | 2469 | rdev_for_each(rdev, mddev) { |
42543769 N |
2470 | if (rdev->sb_events == mddev->events || |
2471 | (nospares && | |
2472 | rdev->raid_disk < 0 && | |
42543769 N |
2473 | rdev->sb_events+1 == mddev->events)) { |
2474 | /* Don't update this superblock */ | |
2475 | rdev->sb_loaded = 2; | |
2476 | } else { | |
076f968b | 2477 | sync_super(mddev, rdev); |
42543769 N |
2478 | rdev->sb_loaded = 1; |
2479 | } | |
1da177e4 LT |
2480 | } |
2481 | } | |
2482 | ||
2aa82191 GR |
2483 | static bool does_sb_need_changing(struct mddev *mddev) |
2484 | { | |
2485 | struct md_rdev *rdev; | |
2486 | struct mdp_superblock_1 *sb; | |
2487 | int role; | |
2488 | ||
2489 | /* Find a good rdev */ | |
2490 | rdev_for_each(rdev, mddev) | |
2491 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2492 | break; | |
2493 | ||
2494 | /* No good device found. */ | |
2495 | if (!rdev) | |
2496 | return false; | |
2497 | ||
2498 | sb = page_address(rdev->sb_page); | |
2499 | /* Check if a device has become faulty or a spare become active */ | |
2500 | rdev_for_each(rdev, mddev) { | |
2501 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2502 | /* Device activated? */ | |
2503 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2504 | !test_bit(Faulty, &rdev->flags)) | |
2505 | return true; | |
2506 | /* Device turned faulty? */ | |
2507 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2508 | return true; | |
2509 | } | |
2510 | ||
2511 | /* Check if any mddev parameters have changed */ | |
2512 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2513 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2514 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2515 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2516 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2517 | return true; | |
2518 | ||
2519 | return false; | |
2520 | } | |
2521 | ||
1aee41f6 | 2522 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2523 | { |
3cb03002 | 2524 | struct md_rdev *rdev; |
06d91a5f | 2525 | int sync_req; |
42543769 | 2526 | int nospares = 0; |
2699b672 | 2527 | int any_badblocks_changed = 0; |
23b63f9f | 2528 | int ret = -1; |
1da177e4 | 2529 | |
d87f064f N |
2530 | if (mddev->ro) { |
2531 | if (force_change) | |
2953079c | 2532 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2533 | return; |
2534 | } | |
2aa82191 | 2535 | |
2c97cf13 | 2536 | repeat: |
2aa82191 | 2537 | if (mddev_is_clustered(mddev)) { |
2953079c | 2538 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2539 | force_change = 1; |
2953079c | 2540 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2541 | nospares = 1; |
23b63f9f | 2542 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2543 | /* Has someone else has updated the sb */ |
2544 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2545 | if (ret == 0) |
2546 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2547 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2548 | BIT(MD_SB_CHANGE_DEVS) | | |
2549 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2550 | return; |
2551 | } | |
2552 | } | |
2c97cf13 | 2553 | |
db0505d3 N |
2554 | /* |
2555 | * First make sure individual recovery_offsets are correct | |
2556 | * curr_resync_completed can only be used during recovery. | |
2557 | * During reshape/resync it might use array-addresses rather | |
2558 | * that device addresses. | |
2559 | */ | |
dafb20fa | 2560 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2561 | if (rdev->raid_disk >= 0 && |
2562 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2563 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2564 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2565 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2566 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2567 | !test_bit(In_sync, &rdev->flags) && |
2568 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2569 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2570 | ||
f72ffdd6 | 2571 | } |
bd52b746 | 2572 | if (!mddev->persistent) { |
2953079c SL |
2573 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2574 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2575 | if (!mddev->external) { |
2953079c | 2576 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2577 | rdev_for_each(rdev, mddev) { |
de393cde | 2578 | if (rdev->badblocks.changed) { |
d0962936 | 2579 | rdev->badblocks.changed = 0; |
fc974ee2 | 2580 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2581 | md_error(mddev, rdev); |
2582 | } | |
2583 | clear_bit(Blocked, &rdev->flags); | |
2584 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2585 | wake_up(&rdev->blocked_wait); | |
2586 | } | |
2587 | } | |
3a3a5ddb N |
2588 | wake_up(&mddev->sb_wait); |
2589 | return; | |
2590 | } | |
2591 | ||
85572d7c | 2592 | spin_lock(&mddev->lock); |
84692195 | 2593 | |
9ebc6ef1 | 2594 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2595 | |
2953079c | 2596 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2597 | force_change = 1; |
2953079c | 2598 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2599 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2600 | * though if events isn't the right even/odd, we will have to do | |
2601 | * spares after all | |
2602 | */ | |
2603 | nospares = 1; | |
2604 | if (force_change) | |
2605 | nospares = 0; | |
2606 | if (mddev->degraded) | |
84692195 N |
2607 | /* If the array is degraded, then skipping spares is both |
2608 | * dangerous and fairly pointless. | |
2609 | * Dangerous because a device that was removed from the array | |
2610 | * might have a event_count that still looks up-to-date, | |
2611 | * so it can be re-added without a resync. | |
2612 | * Pointless because if there are any spares to skip, | |
2613 | * then a recovery will happen and soon that array won't | |
2614 | * be degraded any more and the spare can go back to sleep then. | |
2615 | */ | |
850b2b42 | 2616 | nospares = 0; |
84692195 | 2617 | |
06d91a5f | 2618 | sync_req = mddev->in_sync; |
42543769 N |
2619 | |
2620 | /* If this is just a dirty<->clean transition, and the array is clean | |
2621 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2622 | if (nospares |
42543769 | 2623 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2624 | && mddev->can_decrease_events |
2625 | && mddev->events != 1) { | |
42543769 | 2626 | mddev->events--; |
a8707c08 N |
2627 | mddev->can_decrease_events = 0; |
2628 | } else { | |
42543769 N |
2629 | /* otherwise we have to go forward and ... */ |
2630 | mddev->events ++; | |
a8707c08 | 2631 | mddev->can_decrease_events = nospares; |
42543769 | 2632 | } |
1da177e4 | 2633 | |
403df478 N |
2634 | /* |
2635 | * This 64-bit counter should never wrap. | |
2636 | * Either we are in around ~1 trillion A.C., assuming | |
2637 | * 1 reboot per second, or we have a bug... | |
2638 | */ | |
2639 | WARN_ON(mddev->events == 0); | |
2699b672 | 2640 | |
dafb20fa | 2641 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2642 | if (rdev->badblocks.changed) |
2643 | any_badblocks_changed++; | |
de393cde N |
2644 | if (test_bit(Faulty, &rdev->flags)) |
2645 | set_bit(FaultRecorded, &rdev->flags); | |
2646 | } | |
2699b672 | 2647 | |
e691063a | 2648 | sync_sbs(mddev, nospares); |
85572d7c | 2649 | spin_unlock(&mddev->lock); |
1da177e4 | 2650 | |
36a4e1fe N |
2651 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2652 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2653 | |
504634f6 SL |
2654 | if (mddev->queue) |
2655 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2656 | rewrite: |
e64e4018 | 2657 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2658 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2659 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2660 | |
42543769 N |
2661 | if (rdev->sb_loaded != 1) |
2662 | continue; /* no noise on spare devices */ | |
1da177e4 | 2663 | |
f466722c | 2664 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2665 | md_super_write(mddev,rdev, |
0f420358 | 2666 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2667 | rdev->sb_page); |
36a4e1fe N |
2668 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2669 | bdevname(rdev->bdev, b), | |
2670 | (unsigned long long)rdev->sb_start); | |
42543769 | 2671 | rdev->sb_events = mddev->events; |
2699b672 N |
2672 | if (rdev->badblocks.size) { |
2673 | md_super_write(mddev, rdev, | |
2674 | rdev->badblocks.sector, | |
2675 | rdev->badblocks.size << 9, | |
2676 | rdev->bb_page); | |
2677 | rdev->badblocks.size = 0; | |
2678 | } | |
7bfa19f2 | 2679 | |
f466722c | 2680 | } else |
36a4e1fe N |
2681 | pr_debug("md: %s (skipping faulty)\n", |
2682 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2683 | |
7bfa19f2 | 2684 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2685 | /* only need to write one superblock... */ |
2686 | break; | |
2687 | } | |
46533ff7 N |
2688 | if (md_super_wait(mddev) < 0) |
2689 | goto rewrite; | |
2953079c | 2690 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2691 | |
2c97cf13 GJ |
2692 | if (mddev_is_clustered(mddev) && ret == 0) |
2693 | md_cluster_ops->metadata_update_finish(mddev); | |
2694 | ||
850b2b42 | 2695 | if (mddev->in_sync != sync_req || |
2953079c SL |
2696 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2697 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2698 | /* have to write it out again */ |
06d91a5f | 2699 | goto repeat; |
3d310eb7 | 2700 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2701 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2702 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2703 | |
dafb20fa | 2704 | rdev_for_each(rdev, mddev) { |
de393cde N |
2705 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2706 | clear_bit(Blocked, &rdev->flags); | |
2707 | ||
2708 | if (any_badblocks_changed) | |
fc974ee2 | 2709 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2710 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2711 | wake_up(&rdev->blocked_wait); | |
2712 | } | |
1da177e4 | 2713 | } |
1aee41f6 | 2714 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2715 | |
a6da4ef8 GR |
2716 | static int add_bound_rdev(struct md_rdev *rdev) |
2717 | { | |
2718 | struct mddev *mddev = rdev->mddev; | |
2719 | int err = 0; | |
87d4d916 | 2720 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2721 | |
87d4d916 | 2722 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2723 | /* If there is hot_add_disk but no hot_remove_disk |
2724 | * then added disks for geometry changes, | |
2725 | * and should be added immediately. | |
2726 | */ | |
2727 | super_types[mddev->major_version]. | |
2728 | validate_super(mddev, rdev); | |
87d4d916 SL |
2729 | if (add_journal) |
2730 | mddev_suspend(mddev); | |
a6da4ef8 | 2731 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2732 | if (add_journal) |
2733 | mddev_resume(mddev); | |
a6da4ef8 | 2734 | if (err) { |
db767672 | 2735 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2736 | return err; |
2737 | } | |
2738 | } | |
2739 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2740 | ||
2953079c | 2741 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2742 | if (mddev->degraded) |
2743 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2744 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2745 | md_new_event(mddev); | |
2746 | md_wakeup_thread(mddev->thread); | |
2747 | return 0; | |
2748 | } | |
1da177e4 | 2749 | |
7f6ce769 | 2750 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2751 | * We want to accept with case. For this we use cmd_match. |
2752 | */ | |
2753 | static int cmd_match(const char *cmd, const char *str) | |
2754 | { | |
2755 | /* See if cmd, written into a sysfs file, matches | |
2756 | * str. They must either be the same, or cmd can | |
2757 | * have a trailing newline | |
2758 | */ | |
2759 | while (*cmd && *str && *cmd == *str) { | |
2760 | cmd++; | |
2761 | str++; | |
2762 | } | |
2763 | if (*cmd == '\n') | |
2764 | cmd++; | |
2765 | if (*str || *cmd) | |
2766 | return 0; | |
2767 | return 1; | |
2768 | } | |
2769 | ||
86e6ffdd N |
2770 | struct rdev_sysfs_entry { |
2771 | struct attribute attr; | |
3cb03002 N |
2772 | ssize_t (*show)(struct md_rdev *, char *); |
2773 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2774 | }; |
2775 | ||
2776 | static ssize_t | |
3cb03002 | 2777 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2778 | { |
35b785f7 | 2779 | char *sep = ","; |
20a49ff6 | 2780 | size_t len = 0; |
6aa7de05 | 2781 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2782 | |
758bfc8a | 2783 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2784 | (!test_bit(ExternalBbl, &flags) && |
2785 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2786 | len += sprintf(page+len, "faulty%s", sep); |
2787 | if (test_bit(In_sync, &flags)) | |
2788 | len += sprintf(page+len, "in_sync%s", sep); | |
2789 | if (test_bit(Journal, &flags)) | |
2790 | len += sprintf(page+len, "journal%s", sep); | |
2791 | if (test_bit(WriteMostly, &flags)) | |
2792 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2793 | if (test_bit(Blocked, &flags) || |
52c64152 | 2794 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2795 | && !test_bit(Faulty, &flags))) |
2796 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2797 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2798 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2799 | !test_bit(In_sync, &flags)) |
2800 | len += sprintf(page+len, "spare%s", sep); | |
2801 | if (test_bit(WriteErrorSeen, &flags)) | |
2802 | len += sprintf(page+len, "write_error%s", sep); | |
2803 | if (test_bit(WantReplacement, &flags)) | |
2804 | len += sprintf(page+len, "want_replacement%s", sep); | |
2805 | if (test_bit(Replacement, &flags)) | |
2806 | len += sprintf(page+len, "replacement%s", sep); | |
2807 | if (test_bit(ExternalBbl, &flags)) | |
2808 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2809 | if (test_bit(FailFast, &flags)) |
2810 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2811 | |
2812 | if (len) | |
2813 | len -= strlen(sep); | |
2d78f8c4 | 2814 | |
86e6ffdd N |
2815 | return len+sprintf(page+len, "\n"); |
2816 | } | |
2817 | ||
45dc2de1 | 2818 | static ssize_t |
3cb03002 | 2819 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2820 | { |
2821 | /* can write | |
de393cde | 2822 | * faulty - simulates an error |
45dc2de1 | 2823 | * remove - disconnects the device |
f655675b N |
2824 | * writemostly - sets write_mostly |
2825 | * -writemostly - clears write_mostly | |
de393cde N |
2826 | * blocked - sets the Blocked flags |
2827 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2828 | * insync - sets Insync providing device isn't active |
f466722c N |
2829 | * -insync - clear Insync for a device with a slot assigned, |
2830 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2831 | * write_error - sets WriteErrorSeen |
2832 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2833 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2834 | */ |
2835 | int err = -EINVAL; | |
2836 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2837 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2838 | if (test_bit(Faulty, &rdev->flags)) |
2839 | err = 0; | |
2840 | else | |
2841 | err = -EBUSY; | |
45dc2de1 | 2842 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2843 | if (rdev->mddev->pers) { |
2844 | clear_bit(Blocked, &rdev->flags); | |
2845 | remove_and_add_spares(rdev->mddev, rdev); | |
2846 | } | |
45dc2de1 N |
2847 | if (rdev->raid_disk >= 0) |
2848 | err = -EBUSY; | |
2849 | else { | |
fd01b88c | 2850 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2851 | err = 0; |
a9720903 GJ |
2852 | if (mddev_is_clustered(mddev)) |
2853 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2854 | ||
2855 | if (err == 0) { | |
2856 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2857 | if (mddev->pers) { |
2953079c | 2858 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2859 | md_wakeup_thread(mddev->thread); |
2860 | } | |
a9720903 GJ |
2861 | md_new_event(mddev); |
2862 | } | |
45dc2de1 | 2863 | } |
f655675b N |
2864 | } else if (cmd_match(buf, "writemostly")) { |
2865 | set_bit(WriteMostly, &rdev->flags); | |
963c555e | 2866 | mddev_create_wb_pool(rdev->mddev, rdev, false); |
f655675b N |
2867 | err = 0; |
2868 | } else if (cmd_match(buf, "-writemostly")) { | |
963c555e | 2869 | mddev_destroy_wb_pool(rdev->mddev, rdev); |
f655675b | 2870 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
2871 | err = 0; |
2872 | } else if (cmd_match(buf, "blocked")) { | |
2873 | set_bit(Blocked, &rdev->flags); | |
2874 | err = 0; | |
2875 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2876 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2877 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2878 | rdev->badblocks.unacked_exist) { |
de393cde N |
2879 | /* metadata handler doesn't understand badblocks, |
2880 | * so we need to fail the device | |
2881 | */ | |
2882 | md_error(rdev->mddev, rdev); | |
2883 | } | |
6bfe0b49 | 2884 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2885 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2886 | wake_up(&rdev->blocked_wait); |
2887 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2888 | md_wakeup_thread(rdev->mddev->thread); | |
2889 | ||
6d56e278 N |
2890 | err = 0; |
2891 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2892 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2893 | err = 0; |
688834e6 N |
2894 | } else if (cmd_match(buf, "failfast")) { |
2895 | set_bit(FailFast, &rdev->flags); | |
2896 | err = 0; | |
2897 | } else if (cmd_match(buf, "-failfast")) { | |
2898 | clear_bit(FailFast, &rdev->flags); | |
2899 | err = 0; | |
f2076e7d SL |
2900 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2901 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2902 | if (rdev->mddev->pers == NULL) { |
2903 | clear_bit(In_sync, &rdev->flags); | |
2904 | rdev->saved_raid_disk = rdev->raid_disk; | |
2905 | rdev->raid_disk = -1; | |
2906 | err = 0; | |
2907 | } | |
d7a9d443 N |
2908 | } else if (cmd_match(buf, "write_error")) { |
2909 | set_bit(WriteErrorSeen, &rdev->flags); | |
2910 | err = 0; | |
2911 | } else if (cmd_match(buf, "-write_error")) { | |
2912 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2913 | err = 0; | |
2d78f8c4 N |
2914 | } else if (cmd_match(buf, "want_replacement")) { |
2915 | /* Any non-spare device that is not a replacement can | |
2916 | * become want_replacement at any time, but we then need to | |
2917 | * check if recovery is needed. | |
2918 | */ | |
2919 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2920 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2921 | !test_bit(Replacement, &rdev->flags)) |
2922 | set_bit(WantReplacement, &rdev->flags); | |
2923 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2924 | md_wakeup_thread(rdev->mddev->thread); | |
2925 | err = 0; | |
2926 | } else if (cmd_match(buf, "-want_replacement")) { | |
2927 | /* Clearing 'want_replacement' is always allowed. | |
2928 | * Once replacements starts it is too late though. | |
2929 | */ | |
2930 | err = 0; | |
2931 | clear_bit(WantReplacement, &rdev->flags); | |
2932 | } else if (cmd_match(buf, "replacement")) { | |
2933 | /* Can only set a device as a replacement when array has not | |
2934 | * yet been started. Once running, replacement is automatic | |
2935 | * from spares, or by assigning 'slot'. | |
2936 | */ | |
2937 | if (rdev->mddev->pers) | |
2938 | err = -EBUSY; | |
2939 | else { | |
2940 | set_bit(Replacement, &rdev->flags); | |
2941 | err = 0; | |
2942 | } | |
2943 | } else if (cmd_match(buf, "-replacement")) { | |
2944 | /* Similarly, can only clear Replacement before start */ | |
2945 | if (rdev->mddev->pers) | |
2946 | err = -EBUSY; | |
2947 | else { | |
2948 | clear_bit(Replacement, &rdev->flags); | |
2949 | err = 0; | |
2950 | } | |
a6da4ef8 | 2951 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
2952 | if (!rdev->mddev->pers) |
2953 | err = -EINVAL; | |
2954 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
2955 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
2956 | /* clear_bit is performed _after_ all the devices |
2957 | * have their local Faulty bit cleared. If any writes | |
2958 | * happen in the meantime in the local node, they | |
2959 | * will land in the local bitmap, which will be synced | |
2960 | * by this node eventually | |
2961 | */ | |
2962 | if (!mddev_is_clustered(rdev->mddev) || | |
2963 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2964 | clear_bit(Faulty, &rdev->flags); | |
2965 | err = add_bound_rdev(rdev); | |
2966 | } | |
a6da4ef8 GR |
2967 | } else |
2968 | err = -EBUSY; | |
35b785f7 TM |
2969 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2970 | set_bit(ExternalBbl, &rdev->flags); | |
2971 | rdev->badblocks.shift = 0; | |
2972 | err = 0; | |
2973 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
2974 | clear_bit(ExternalBbl, &rdev->flags); | |
2975 | err = 0; | |
45dc2de1 | 2976 | } |
00bcb4ac N |
2977 | if (!err) |
2978 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2979 | return err ? err : len; |
2980 | } | |
80ca3a44 | 2981 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2982 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2983 | |
4dbcdc75 | 2984 | static ssize_t |
3cb03002 | 2985 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2986 | { |
2987 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2988 | } | |
2989 | ||
2990 | static ssize_t | |
3cb03002 | 2991 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2992 | { |
4c9309c0 AD |
2993 | unsigned int n; |
2994 | int rv; | |
2995 | ||
2996 | rv = kstrtouint(buf, 10, &n); | |
2997 | if (rv < 0) | |
2998 | return rv; | |
2999 | atomic_set(&rdev->corrected_errors, n); | |
3000 | return len; | |
4dbcdc75 N |
3001 | } |
3002 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 3003 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 3004 | |
014236d2 | 3005 | static ssize_t |
3cb03002 | 3006 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 3007 | { |
f2076e7d SL |
3008 | if (test_bit(Journal, &rdev->flags)) |
3009 | return sprintf(page, "journal\n"); | |
3010 | else if (rdev->raid_disk < 0) | |
014236d2 N |
3011 | return sprintf(page, "none\n"); |
3012 | else | |
3013 | return sprintf(page, "%d\n", rdev->raid_disk); | |
3014 | } | |
3015 | ||
3016 | static ssize_t | |
3cb03002 | 3017 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 3018 | { |
4c9309c0 | 3019 | int slot; |
c303da6d | 3020 | int err; |
4c9309c0 | 3021 | |
f2076e7d SL |
3022 | if (test_bit(Journal, &rdev->flags)) |
3023 | return -EBUSY; | |
014236d2 N |
3024 | if (strncmp(buf, "none", 4)==0) |
3025 | slot = -1; | |
4c9309c0 AD |
3026 | else { |
3027 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
3028 | if (err < 0) | |
3029 | return err; | |
3030 | } | |
6c2fce2e | 3031 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3032 | /* Setting 'slot' on an active array requires also |
3033 | * updating the 'rd%d' link, and communicating | |
3034 | * with the personality with ->hot_*_disk. | |
3035 | * For now we only support removing | |
3036 | * failed/spare devices. This normally happens automatically, | |
3037 | * but not when the metadata is externally managed. | |
3038 | */ | |
c303da6d N |
3039 | if (rdev->raid_disk == -1) |
3040 | return -EEXIST; | |
3041 | /* personality does all needed checks */ | |
01393f3d | 3042 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3043 | return -EINVAL; |
746d3207 N |
3044 | clear_bit(Blocked, &rdev->flags); |
3045 | remove_and_add_spares(rdev->mddev, rdev); | |
3046 | if (rdev->raid_disk >= 0) | |
3047 | return -EBUSY; | |
c303da6d N |
3048 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3049 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3050 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3051 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3052 | * if we ever get bitmaps working here. |
6c2fce2e | 3053 | */ |
cb01c549 | 3054 | int err; |
6c2fce2e NB |
3055 | |
3056 | if (rdev->raid_disk != -1) | |
3057 | return -EBUSY; | |
3058 | ||
c6751b2b N |
3059 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3060 | return -EBUSY; | |
3061 | ||
6c2fce2e NB |
3062 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3063 | return -EINVAL; | |
3064 | ||
ba1b41b6 N |
3065 | if (slot >= rdev->mddev->raid_disks && |
3066 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3067 | return -ENOSPC; | |
3068 | ||
6c2fce2e NB |
3069 | rdev->raid_disk = slot; |
3070 | if (test_bit(In_sync, &rdev->flags)) | |
3071 | rdev->saved_raid_disk = slot; | |
3072 | else | |
3073 | rdev->saved_raid_disk = -1; | |
d30519fc | 3074 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3075 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
3076 | err = rdev->mddev->pers-> |
3077 | hot_add_disk(rdev->mddev, rdev); | |
3078 | if (err) { | |
3079 | rdev->raid_disk = -1; | |
3080 | return err; | |
3081 | } else | |
3082 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
3083 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
3084 | /* failure here is OK */; | |
6c2fce2e | 3085 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3086 | } else { |
ba1b41b6 N |
3087 | if (slot >= rdev->mddev->raid_disks && |
3088 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3089 | return -ENOSPC; |
3090 | rdev->raid_disk = slot; | |
3091 | /* assume it is working */ | |
c5d79adb N |
3092 | clear_bit(Faulty, &rdev->flags); |
3093 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3094 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3095 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3096 | } |
014236d2 N |
3097 | return len; |
3098 | } | |
3099 | ||
014236d2 | 3100 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3101 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3102 | |
93c8cad0 | 3103 | static ssize_t |
3cb03002 | 3104 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3105 | { |
6961ece4 | 3106 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3107 | } |
3108 | ||
3109 | static ssize_t | |
3cb03002 | 3110 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3111 | { |
c6563a8c | 3112 | unsigned long long offset; |
b29bebd6 | 3113 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3114 | return -EINVAL; |
8ed0a521 | 3115 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3116 | return -EBUSY; |
dd8ac336 | 3117 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3118 | /* Must set offset before size, so overlap checks |
3119 | * can be sane */ | |
3120 | return -EBUSY; | |
93c8cad0 | 3121 | rdev->data_offset = offset; |
25f7fd47 | 3122 | rdev->new_data_offset = offset; |
93c8cad0 N |
3123 | return len; |
3124 | } | |
3125 | ||
3126 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3127 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3128 | |
c6563a8c N |
3129 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3130 | { | |
3131 | return sprintf(page, "%llu\n", | |
3132 | (unsigned long long)rdev->new_data_offset); | |
3133 | } | |
3134 | ||
3135 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3136 | const char *buf, size_t len) | |
3137 | { | |
3138 | unsigned long long new_offset; | |
3139 | struct mddev *mddev = rdev->mddev; | |
3140 | ||
b29bebd6 | 3141 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3142 | return -EINVAL; |
3143 | ||
f851b60d N |
3144 | if (mddev->sync_thread || |
3145 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3146 | return -EBUSY; |
3147 | if (new_offset == rdev->data_offset) | |
3148 | /* reset is always permitted */ | |
3149 | ; | |
3150 | else if (new_offset > rdev->data_offset) { | |
3151 | /* must not push array size beyond rdev_sectors */ | |
3152 | if (new_offset - rdev->data_offset | |
3153 | + mddev->dev_sectors > rdev->sectors) | |
3154 | return -E2BIG; | |
3155 | } | |
3156 | /* Metadata worries about other space details. */ | |
3157 | ||
3158 | /* decreasing the offset is inconsistent with a backwards | |
3159 | * reshape. | |
3160 | */ | |
3161 | if (new_offset < rdev->data_offset && | |
3162 | mddev->reshape_backwards) | |
3163 | return -EINVAL; | |
3164 | /* Increasing offset is inconsistent with forwards | |
3165 | * reshape. reshape_direction should be set to | |
3166 | * 'backwards' first. | |
3167 | */ | |
3168 | if (new_offset > rdev->data_offset && | |
3169 | !mddev->reshape_backwards) | |
3170 | return -EINVAL; | |
3171 | ||
3172 | if (mddev->pers && mddev->persistent && | |
3173 | !super_types[mddev->major_version] | |
3174 | .allow_new_offset(rdev, new_offset)) | |
3175 | return -E2BIG; | |
3176 | rdev->new_data_offset = new_offset; | |
3177 | if (new_offset > rdev->data_offset) | |
3178 | mddev->reshape_backwards = 1; | |
3179 | else if (new_offset < rdev->data_offset) | |
3180 | mddev->reshape_backwards = 0; | |
3181 | ||
3182 | return len; | |
3183 | } | |
3184 | static struct rdev_sysfs_entry rdev_new_offset = | |
3185 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3186 | ||
83303b61 | 3187 | static ssize_t |
3cb03002 | 3188 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3189 | { |
dd8ac336 | 3190 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3191 | } |
3192 | ||
c5d79adb N |
3193 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3194 | { | |
3195 | /* check if two start/length pairs overlap */ | |
3196 | if (s1+l1 <= s2) | |
3197 | return 0; | |
3198 | if (s2+l2 <= s1) | |
3199 | return 0; | |
3200 | return 1; | |
3201 | } | |
3202 | ||
b522adcd DW |
3203 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3204 | { | |
3205 | unsigned long long blocks; | |
3206 | sector_t new; | |
3207 | ||
b29bebd6 | 3208 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3209 | return -EINVAL; |
3210 | ||
3211 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3212 | return -EINVAL; /* sector conversion overflow */ | |
3213 | ||
3214 | new = blocks * 2; | |
3215 | if (new != blocks * 2) | |
3216 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3217 | ||
3218 | *sectors = new; | |
3219 | return 0; | |
3220 | } | |
3221 | ||
83303b61 | 3222 | static ssize_t |
3cb03002 | 3223 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3224 | { |
fd01b88c | 3225 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3226 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3227 | sector_t sectors; |
27c529bb | 3228 | |
f2076e7d SL |
3229 | if (test_bit(Journal, &rdev->flags)) |
3230 | return -EBUSY; | |
b522adcd | 3231 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3232 | return -EINVAL; |
c6563a8c N |
3233 | if (rdev->data_offset != rdev->new_data_offset) |
3234 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3235 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3236 | if (my_mddev->persistent) { |
dd8ac336 AN |
3237 | sectors = super_types[my_mddev->major_version]. |
3238 | rdev_size_change(rdev, sectors); | |
3239 | if (!sectors) | |
0cd17fec | 3240 | return -EBUSY; |
dd8ac336 | 3241 | } else if (!sectors) |
77304d2a | 3242 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3243 | rdev->data_offset; |
a6468539 N |
3244 | if (!my_mddev->pers->resize) |
3245 | /* Cannot change size for RAID0 or Linear etc */ | |
3246 | return -EINVAL; | |
0cd17fec | 3247 | } |
dd8ac336 | 3248 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3249 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3250 | |
dd8ac336 AN |
3251 | rdev->sectors = sectors; |
3252 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3253 | /* Need to check that all other rdevs with the same |
3254 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3255 | * the rdev lists safely. | |
3256 | * This check does not provide a hard guarantee, it | |
3257 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3258 | */ |
fd01b88c | 3259 | struct mddev *mddev; |
c5d79adb | 3260 | int overlap = 0; |
159ec1fc | 3261 | struct list_head *tmp; |
c5d79adb | 3262 | |
8b1afc3d | 3263 | rcu_read_lock(); |
29ac4aa3 | 3264 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3265 | struct md_rdev *rdev2; |
c5d79adb | 3266 | |
dafb20fa | 3267 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3268 | if (rdev->bdev == rdev2->bdev && |
3269 | rdev != rdev2 && | |
3270 | overlaps(rdev->data_offset, rdev->sectors, | |
3271 | rdev2->data_offset, | |
3272 | rdev2->sectors)) { | |
c5d79adb N |
3273 | overlap = 1; |
3274 | break; | |
3275 | } | |
c5d79adb N |
3276 | if (overlap) { |
3277 | mddev_put(mddev); | |
3278 | break; | |
3279 | } | |
3280 | } | |
8b1afc3d | 3281 | rcu_read_unlock(); |
c5d79adb N |
3282 | if (overlap) { |
3283 | /* Someone else could have slipped in a size | |
3284 | * change here, but doing so is just silly. | |
dd8ac336 | 3285 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3286 | * safe, and trust userspace not to race with |
3287 | * itself | |
3288 | */ | |
dd8ac336 | 3289 | rdev->sectors = oldsectors; |
c5d79adb N |
3290 | return -EBUSY; |
3291 | } | |
3292 | } | |
83303b61 N |
3293 | return len; |
3294 | } | |
3295 | ||
3296 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3297 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3298 | |
3cb03002 | 3299 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3300 | { |
3301 | unsigned long long recovery_start = rdev->recovery_offset; | |
3302 | ||
3303 | if (test_bit(In_sync, &rdev->flags) || | |
3304 | recovery_start == MaxSector) | |
3305 | return sprintf(page, "none\n"); | |
3306 | ||
3307 | return sprintf(page, "%llu\n", recovery_start); | |
3308 | } | |
3309 | ||
3cb03002 | 3310 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3311 | { |
3312 | unsigned long long recovery_start; | |
3313 | ||
3314 | if (cmd_match(buf, "none")) | |
3315 | recovery_start = MaxSector; | |
b29bebd6 | 3316 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3317 | return -EINVAL; |
3318 | ||
3319 | if (rdev->mddev->pers && | |
3320 | rdev->raid_disk >= 0) | |
3321 | return -EBUSY; | |
3322 | ||
3323 | rdev->recovery_offset = recovery_start; | |
3324 | if (recovery_start == MaxSector) | |
3325 | set_bit(In_sync, &rdev->flags); | |
3326 | else | |
3327 | clear_bit(In_sync, &rdev->flags); | |
3328 | return len; | |
3329 | } | |
3330 | ||
3331 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3332 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3333 | ||
fc974ee2 VV |
3334 | /* sysfs access to bad-blocks list. |
3335 | * We present two files. | |
3336 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3337 | * are recorded as bad. The list is truncated to fit within | |
3338 | * the one-page limit of sysfs. | |
3339 | * Writing "sector length" to this file adds an acknowledged | |
3340 | * bad block list. | |
3341 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3342 | * been acknowledged. Writing to this file adds bad blocks | |
3343 | * without acknowledging them. This is largely for testing. | |
3344 | */ | |
3cb03002 | 3345 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3346 | { |
3347 | return badblocks_show(&rdev->badblocks, page, 0); | |
3348 | } | |
3cb03002 | 3349 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3350 | { |
de393cde N |
3351 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3352 | /* Maybe that ack was all we needed */ | |
3353 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3354 | wake_up(&rdev->blocked_wait); | |
3355 | return rv; | |
16c791a5 N |
3356 | } |
3357 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3358 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3359 | ||
3cb03002 | 3360 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3361 | { |
3362 | return badblocks_show(&rdev->badblocks, page, 1); | |
3363 | } | |
3cb03002 | 3364 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3365 | { |
3366 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3367 | } | |
3368 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3369 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3370 | ||
664aed04 AP |
3371 | static ssize_t |
3372 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3373 | { | |
3374 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3375 | } | |
3376 | ||
3377 | static ssize_t | |
3378 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3379 | { | |
3380 | unsigned long long sector; | |
3381 | ||
3382 | if (kstrtoull(buf, 10, §or) < 0) | |
3383 | return -EINVAL; | |
3384 | if (sector != (sector_t)sector) | |
3385 | return -EINVAL; | |
3386 | ||
3387 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3388 | rdev->raid_disk >= 0) | |
3389 | return -EBUSY; | |
3390 | ||
3391 | if (rdev->mddev->persistent) { | |
3392 | if (rdev->mddev->major_version == 0) | |
3393 | return -EINVAL; | |
3394 | if ((sector > rdev->sb_start && | |
3395 | sector - rdev->sb_start > S16_MAX) || | |
3396 | (sector < rdev->sb_start && | |
3397 | rdev->sb_start - sector > -S16_MIN)) | |
3398 | return -EINVAL; | |
3399 | rdev->ppl.offset = sector - rdev->sb_start; | |
3400 | } else if (!rdev->mddev->external) { | |
3401 | return -EBUSY; | |
3402 | } | |
3403 | rdev->ppl.sector = sector; | |
3404 | return len; | |
3405 | } | |
3406 | ||
3407 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3408 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3409 | ||
3410 | static ssize_t | |
3411 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3412 | { | |
3413 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3414 | } | |
3415 | ||
3416 | static ssize_t | |
3417 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3418 | { | |
3419 | unsigned int size; | |
3420 | ||
3421 | if (kstrtouint(buf, 10, &size) < 0) | |
3422 | return -EINVAL; | |
3423 | ||
3424 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3425 | rdev->raid_disk >= 0) | |
3426 | return -EBUSY; | |
3427 | ||
3428 | if (rdev->mddev->persistent) { | |
3429 | if (rdev->mddev->major_version == 0) | |
3430 | return -EINVAL; | |
3431 | if (size > U16_MAX) | |
3432 | return -EINVAL; | |
3433 | } else if (!rdev->mddev->external) { | |
3434 | return -EBUSY; | |
3435 | } | |
3436 | rdev->ppl.size = size; | |
3437 | return len; | |
3438 | } | |
3439 | ||
3440 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3441 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3442 | ||
86e6ffdd N |
3443 | static struct attribute *rdev_default_attrs[] = { |
3444 | &rdev_state.attr, | |
4dbcdc75 | 3445 | &rdev_errors.attr, |
014236d2 | 3446 | &rdev_slot.attr, |
93c8cad0 | 3447 | &rdev_offset.attr, |
c6563a8c | 3448 | &rdev_new_offset.attr, |
83303b61 | 3449 | &rdev_size.attr, |
06e3c817 | 3450 | &rdev_recovery_start.attr, |
16c791a5 N |
3451 | &rdev_bad_blocks.attr, |
3452 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3453 | &rdev_ppl_sector.attr, |
3454 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3455 | NULL, |
3456 | }; | |
3457 | static ssize_t | |
3458 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3459 | { | |
3460 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3461 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3462 | |
3463 | if (!entry->show) | |
3464 | return -EIO; | |
758bfc8a | 3465 | if (!rdev->mddev) |
168b305b | 3466 | return -ENODEV; |
758bfc8a | 3467 | return entry->show(rdev, page); |
86e6ffdd N |
3468 | } |
3469 | ||
3470 | static ssize_t | |
3471 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3472 | const char *page, size_t length) | |
3473 | { | |
3474 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3475 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3476 | ssize_t rv; |
fd01b88c | 3477 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3478 | |
3479 | if (!entry->store) | |
3480 | return -EIO; | |
67463acb N |
3481 | if (!capable(CAP_SYS_ADMIN)) |
3482 | return -EACCES; | |
c42d3240 | 3483 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3484 | if (!rv) { |
27c529bb | 3485 | if (rdev->mddev == NULL) |
c42d3240 | 3486 | rv = -ENODEV; |
27c529bb N |
3487 | else |
3488 | rv = entry->store(rdev, page, length); | |
6a51830e | 3489 | mddev_unlock(mddev); |
ca388059 N |
3490 | } |
3491 | return rv; | |
86e6ffdd N |
3492 | } |
3493 | ||
3494 | static void rdev_free(struct kobject *ko) | |
3495 | { | |
3cb03002 | 3496 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3497 | kfree(rdev); |
3498 | } | |
52cf25d0 | 3499 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3500 | .show = rdev_attr_show, |
3501 | .store = rdev_attr_store, | |
3502 | }; | |
3503 | static struct kobj_type rdev_ktype = { | |
3504 | .release = rdev_free, | |
3505 | .sysfs_ops = &rdev_sysfs_ops, | |
3506 | .default_attrs = rdev_default_attrs, | |
3507 | }; | |
3508 | ||
3cb03002 | 3509 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3510 | { |
3511 | rdev->desc_nr = -1; | |
3512 | rdev->saved_raid_disk = -1; | |
3513 | rdev->raid_disk = -1; | |
3514 | rdev->flags = 0; | |
3515 | rdev->data_offset = 0; | |
c6563a8c | 3516 | rdev->new_data_offset = 0; |
e8bb9a83 | 3517 | rdev->sb_events = 0; |
0e3ef49e | 3518 | rdev->last_read_error = 0; |
2699b672 N |
3519 | rdev->sb_loaded = 0; |
3520 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3521 | atomic_set(&rdev->nr_pending, 0); |
3522 | atomic_set(&rdev->read_errors, 0); | |
3523 | atomic_set(&rdev->corrected_errors, 0); | |
3524 | ||
3525 | INIT_LIST_HEAD(&rdev->same_set); | |
3526 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3527 | |
3528 | /* Add space to store bad block list. | |
3529 | * This reserves the space even on arrays where it cannot | |
3530 | * be used - I wonder if that matters | |
3531 | */ | |
fc974ee2 | 3532 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3533 | } |
3534 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3535 | /* |
3536 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3537 | * | |
3538 | * mark the device faulty if: | |
3539 | * | |
3540 | * - the device is nonexistent (zero size) | |
3541 | * - the device has no valid superblock | |
3542 | * | |
3543 | * a faulty rdev _never_ has rdev->sb set. | |
3544 | */ | |
3cb03002 | 3545 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3546 | { |
3547 | char b[BDEVNAME_SIZE]; | |
3548 | int err; | |
3cb03002 | 3549 | struct md_rdev *rdev; |
1da177e4 LT |
3550 | sector_t size; |
3551 | ||
9ffae0cf | 3552 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3553 | if (!rdev) |
1da177e4 | 3554 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3555 | |
2230dfe4 N |
3556 | err = md_rdev_init(rdev); |
3557 | if (err) | |
3558 | goto abort_free; | |
3559 | err = alloc_disk_sb(rdev); | |
3560 | if (err) | |
1da177e4 LT |
3561 | goto abort_free; |
3562 | ||
c5d79adb | 3563 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3564 | if (err) |
3565 | goto abort_free; | |
3566 | ||
f9cb074b | 3567 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3568 | |
77304d2a | 3569 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3570 | if (!size) { |
9d48739e | 3571 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3572 | bdevname(rdev->bdev,b)); |
3573 | err = -EINVAL; | |
3574 | goto abort_free; | |
3575 | } | |
3576 | ||
3577 | if (super_format >= 0) { | |
3578 | err = super_types[super_format]. | |
3579 | load_super(rdev, NULL, super_minor); | |
3580 | if (err == -EINVAL) { | |
9d48739e | 3581 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3582 | bdevname(rdev->bdev,b), |
9d48739e | 3583 | super_format, super_minor); |
1da177e4 LT |
3584 | goto abort_free; |
3585 | } | |
3586 | if (err < 0) { | |
9d48739e | 3587 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3588 | bdevname(rdev->bdev,b)); |
3589 | goto abort_free; | |
3590 | } | |
3591 | } | |
6bfe0b49 | 3592 | |
1da177e4 LT |
3593 | return rdev; |
3594 | ||
3595 | abort_free: | |
2699b672 N |
3596 | if (rdev->bdev) |
3597 | unlock_rdev(rdev); | |
545c8795 | 3598 | md_rdev_clear(rdev); |
1da177e4 LT |
3599 | kfree(rdev); |
3600 | return ERR_PTR(err); | |
3601 | } | |
3602 | ||
3603 | /* | |
3604 | * Check a full RAID array for plausibility | |
3605 | */ | |
3606 | ||
f72ffdd6 | 3607 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3608 | { |
3609 | int i; | |
3cb03002 | 3610 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3611 | char b[BDEVNAME_SIZE]; |
3612 | ||
3613 | freshest = NULL; | |
dafb20fa | 3614 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3615 | switch (super_types[mddev->major_version]. |
3616 | load_super(rdev, freshest, mddev->minor_version)) { | |
3617 | case 1: | |
3618 | freshest = rdev; | |
3619 | break; | |
3620 | case 0: | |
3621 | break; | |
3622 | default: | |
9d48739e | 3623 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3624 | bdevname(rdev->bdev,b)); |
fb56dfef | 3625 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3626 | } |
3627 | ||
1da177e4 LT |
3628 | super_types[mddev->major_version]. |
3629 | validate_super(mddev, freshest); | |
3630 | ||
3631 | i = 0; | |
dafb20fa | 3632 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3633 | if (mddev->max_disks && |
3634 | (rdev->desc_nr >= mddev->max_disks || | |
3635 | i > mddev->max_disks)) { | |
9d48739e N |
3636 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3637 | mdname(mddev), bdevname(rdev->bdev, b), | |
3638 | mddev->max_disks); | |
fb56dfef | 3639 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3640 | continue; |
3641 | } | |
1aee41f6 | 3642 | if (rdev != freshest) { |
1da177e4 LT |
3643 | if (super_types[mddev->major_version]. |
3644 | validate_super(mddev, rdev)) { | |
9d48739e | 3645 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3646 | bdevname(rdev->bdev,b)); |
fb56dfef | 3647 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3648 | continue; |
3649 | } | |
1aee41f6 | 3650 | } |
1da177e4 LT |
3651 | if (mddev->level == LEVEL_MULTIPATH) { |
3652 | rdev->desc_nr = i++; | |
3653 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3654 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3655 | } else if (rdev->raid_disk >= |
3656 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3657 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3658 | rdev->raid_disk = -1; |
3659 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3660 | } |
3661 | } | |
1da177e4 LT |
3662 | } |
3663 | ||
72e02075 N |
3664 | /* Read a fixed-point number. |
3665 | * Numbers in sysfs attributes should be in "standard" units where | |
3666 | * possible, so time should be in seconds. | |
f72ffdd6 | 3667 | * However we internally use a a much smaller unit such as |
72e02075 N |
3668 | * milliseconds or jiffies. |
3669 | * This function takes a decimal number with a possible fractional | |
3670 | * component, and produces an integer which is the result of | |
3671 | * multiplying that number by 10^'scale'. | |
3672 | * all without any floating-point arithmetic. | |
3673 | */ | |
3674 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3675 | { | |
3676 | unsigned long result = 0; | |
3677 | long decimals = -1; | |
3678 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3679 | if (*cp == '.') | |
3680 | decimals = 0; | |
3681 | else if (decimals < scale) { | |
3682 | unsigned int value; | |
3683 | value = *cp - '0'; | |
3684 | result = result * 10 + value; | |
3685 | if (decimals >= 0) | |
3686 | decimals++; | |
3687 | } | |
3688 | cp++; | |
3689 | } | |
3690 | if (*cp == '\n') | |
3691 | cp++; | |
3692 | if (*cp) | |
3693 | return -EINVAL; | |
3694 | if (decimals < 0) | |
3695 | decimals = 0; | |
cf891607 | 3696 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3697 | return 0; |
3698 | } | |
3699 | ||
16f17b39 | 3700 | static ssize_t |
fd01b88c | 3701 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3702 | { |
3703 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3704 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3705 | } | |
3706 | static ssize_t | |
fd01b88c | 3707 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3708 | { |
16f17b39 | 3709 | unsigned long msec; |
97ce0a7f | 3710 | |
28c1b9fd | 3711 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3712 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3713 | return -EINVAL; |
3714 | } | |
3715 | ||
72e02075 | 3716 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3717 | return -EINVAL; |
16f17b39 N |
3718 | if (msec == 0) |
3719 | mddev->safemode_delay = 0; | |
3720 | else { | |
19052c0e | 3721 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3722 | unsigned long new_delay = (msec*HZ)/1000; |
3723 | ||
3724 | if (new_delay == 0) | |
3725 | new_delay = 1; | |
3726 | mddev->safemode_delay = new_delay; | |
3727 | if (new_delay < old_delay || old_delay == 0) | |
3728 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3729 | } |
3730 | return len; | |
3731 | } | |
3732 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3733 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3734 | |
eae1701f | 3735 | static ssize_t |
fd01b88c | 3736 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3737 | { |
36d091f4 N |
3738 | struct md_personality *p; |
3739 | int ret; | |
3740 | spin_lock(&mddev->lock); | |
3741 | p = mddev->pers; | |
d9d166c2 | 3742 | if (p) |
36d091f4 | 3743 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3744 | else if (mddev->clevel[0]) |
36d091f4 | 3745 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3746 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3747 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3748 | else |
36d091f4 N |
3749 | ret = 0; |
3750 | spin_unlock(&mddev->lock); | |
3751 | return ret; | |
eae1701f N |
3752 | } |
3753 | ||
d9d166c2 | 3754 | static ssize_t |
fd01b88c | 3755 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3756 | { |
f2859af6 | 3757 | char clevel[16]; |
6791875e N |
3758 | ssize_t rv; |
3759 | size_t slen = len; | |
db721d32 | 3760 | struct md_personality *pers, *oldpers; |
f2859af6 | 3761 | long level; |
db721d32 | 3762 | void *priv, *oldpriv; |
3cb03002 | 3763 | struct md_rdev *rdev; |
245f46c2 | 3764 | |
6791875e N |
3765 | if (slen == 0 || slen >= sizeof(clevel)) |
3766 | return -EINVAL; | |
3767 | ||
3768 | rv = mddev_lock(mddev); | |
3769 | if (rv) | |
3770 | return rv; | |
3771 | ||
245f46c2 | 3772 | if (mddev->pers == NULL) { |
6791875e N |
3773 | strncpy(mddev->clevel, buf, slen); |
3774 | if (mddev->clevel[slen-1] == '\n') | |
3775 | slen--; | |
3776 | mddev->clevel[slen] = 0; | |
245f46c2 | 3777 | mddev->level = LEVEL_NONE; |
6791875e N |
3778 | rv = len; |
3779 | goto out_unlock; | |
245f46c2 | 3780 | } |
6791875e | 3781 | rv = -EROFS; |
bd8839e0 | 3782 | if (mddev->ro) |
6791875e | 3783 | goto out_unlock; |
245f46c2 N |
3784 | |
3785 | /* request to change the personality. Need to ensure: | |
3786 | * - array is not engaged in resync/recovery/reshape | |
3787 | * - old personality can be suspended | |
3788 | * - new personality will access other array. | |
3789 | */ | |
3790 | ||
6791875e | 3791 | rv = -EBUSY; |
bb4f1e9d | 3792 | if (mddev->sync_thread || |
f851b60d | 3793 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3794 | mddev->reshape_position != MaxSector || |
3795 | mddev->sysfs_active) | |
6791875e | 3796 | goto out_unlock; |
245f46c2 | 3797 | |
6791875e | 3798 | rv = -EINVAL; |
245f46c2 | 3799 | if (!mddev->pers->quiesce) { |
9d48739e N |
3800 | pr_warn("md: %s: %s does not support online personality change\n", |
3801 | mdname(mddev), mddev->pers->name); | |
6791875e | 3802 | goto out_unlock; |
245f46c2 N |
3803 | } |
3804 | ||
3805 | /* Now find the new personality */ | |
6791875e N |
3806 | strncpy(clevel, buf, slen); |
3807 | if (clevel[slen-1] == '\n') | |
3808 | slen--; | |
3809 | clevel[slen] = 0; | |
b29bebd6 | 3810 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3811 | level = LEVEL_NONE; |
245f46c2 | 3812 | |
f2859af6 DW |
3813 | if (request_module("md-%s", clevel) != 0) |
3814 | request_module("md-level-%s", clevel); | |
245f46c2 | 3815 | spin_lock(&pers_lock); |
f2859af6 | 3816 | pers = find_pers(level, clevel); |
245f46c2 N |
3817 | if (!pers || !try_module_get(pers->owner)) { |
3818 | spin_unlock(&pers_lock); | |
9d48739e | 3819 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3820 | rv = -EINVAL; |
3821 | goto out_unlock; | |
245f46c2 N |
3822 | } |
3823 | spin_unlock(&pers_lock); | |
3824 | ||
3825 | if (pers == mddev->pers) { | |
3826 | /* Nothing to do! */ | |
3827 | module_put(pers->owner); | |
6791875e N |
3828 | rv = len; |
3829 | goto out_unlock; | |
245f46c2 N |
3830 | } |
3831 | if (!pers->takeover) { | |
3832 | module_put(pers->owner); | |
9d48739e N |
3833 | pr_warn("md: %s: %s does not support personality takeover\n", |
3834 | mdname(mddev), clevel); | |
6791875e N |
3835 | rv = -EINVAL; |
3836 | goto out_unlock; | |
245f46c2 N |
3837 | } |
3838 | ||
dafb20fa | 3839 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3840 | rdev->new_raid_disk = rdev->raid_disk; |
3841 | ||
245f46c2 N |
3842 | /* ->takeover must set new_* and/or delta_disks |
3843 | * if it succeeds, and may set them when it fails. | |
3844 | */ | |
3845 | priv = pers->takeover(mddev); | |
3846 | if (IS_ERR(priv)) { | |
3847 | mddev->new_level = mddev->level; | |
3848 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3849 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3850 | mddev->raid_disks -= mddev->delta_disks; |
3851 | mddev->delta_disks = 0; | |
2c810cdd | 3852 | mddev->reshape_backwards = 0; |
245f46c2 | 3853 | module_put(pers->owner); |
9d48739e N |
3854 | pr_warn("md: %s: %s would not accept array\n", |
3855 | mdname(mddev), clevel); | |
6791875e N |
3856 | rv = PTR_ERR(priv); |
3857 | goto out_unlock; | |
245f46c2 N |
3858 | } |
3859 | ||
3860 | /* Looks like we have a winner */ | |
3861 | mddev_suspend(mddev); | |
5aa61f42 | 3862 | mddev_detach(mddev); |
36d091f4 N |
3863 | |
3864 | spin_lock(&mddev->lock); | |
db721d32 N |
3865 | oldpers = mddev->pers; |
3866 | oldpriv = mddev->private; | |
3867 | mddev->pers = pers; | |
3868 | mddev->private = priv; | |
3869 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3870 | mddev->level = mddev->new_level; | |
3871 | mddev->layout = mddev->new_layout; | |
3872 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3873 | mddev->delta_disks = 0; | |
3874 | mddev->reshape_backwards = 0; | |
3875 | mddev->degraded = 0; | |
36d091f4 | 3876 | spin_unlock(&mddev->lock); |
db721d32 N |
3877 | |
3878 | if (oldpers->sync_request == NULL && | |
3879 | mddev->external) { | |
3880 | /* We are converting from a no-redundancy array | |
3881 | * to a redundancy array and metadata is managed | |
3882 | * externally so we need to be sure that writes | |
3883 | * won't block due to a need to transition | |
3884 | * clean->dirty | |
3885 | * until external management is started. | |
3886 | */ | |
3887 | mddev->in_sync = 0; | |
3888 | mddev->safemode_delay = 0; | |
3889 | mddev->safemode = 0; | |
3890 | } | |
f72ffdd6 | 3891 | |
db721d32 N |
3892 | oldpers->free(mddev, oldpriv); |
3893 | ||
3894 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3895 | pers->sync_request != NULL) { |
3896 | /* need to add the md_redundancy_group */ | |
3897 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3898 | pr_warn("md: cannot register extra attributes for %s\n", |
3899 | mdname(mddev)); | |
388975cc | 3900 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3901 | } |
db721d32 | 3902 | if (oldpers->sync_request != NULL && |
a64c876f N |
3903 | pers->sync_request == NULL) { |
3904 | /* need to remove the md_redundancy_group */ | |
3905 | if (mddev->to_remove == NULL) | |
3906 | mddev->to_remove = &md_redundancy_group; | |
3907 | } | |
3908 | ||
4cb9da7d AO |
3909 | module_put(oldpers->owner); |
3910 | ||
dafb20fa | 3911 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3912 | if (rdev->raid_disk < 0) |
3913 | continue; | |
bf2cb0da | 3914 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3915 | rdev->new_raid_disk = -1; |
3916 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3917 | continue; | |
36fad858 | 3918 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3919 | } |
dafb20fa | 3920 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3921 | if (rdev->raid_disk < 0) |
3922 | continue; | |
3923 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3924 | continue; | |
3925 | rdev->raid_disk = rdev->new_raid_disk; | |
3926 | if (rdev->raid_disk < 0) | |
3a981b03 | 3927 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3928 | else { |
36fad858 | 3929 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3930 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3931 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3932 | } |
e93f68a1 N |
3933 | } |
3934 | ||
db721d32 | 3935 | if (pers->sync_request == NULL) { |
9af204cf TM |
3936 | /* this is now an array without redundancy, so |
3937 | * it must always be in_sync | |
3938 | */ | |
3939 | mddev->in_sync = 1; | |
3940 | del_timer_sync(&mddev->safemode_timer); | |
3941 | } | |
02e5f5c0 | 3942 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3943 | pers->run(mddev); |
2953079c | 3944 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3945 | mddev_resume(mddev); |
830778a1 N |
3946 | if (!mddev->thread) |
3947 | md_update_sb(mddev, 1); | |
5cac7861 | 3948 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3949 | md_new_event(mddev); |
6791875e N |
3950 | rv = len; |
3951 | out_unlock: | |
3952 | mddev_unlock(mddev); | |
d9d166c2 N |
3953 | return rv; |
3954 | } | |
3955 | ||
3956 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3957 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3958 | |
d4dbd025 | 3959 | static ssize_t |
fd01b88c | 3960 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3961 | { |
3962 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3963 | if (mddev->reshape_position != MaxSector && |
3964 | mddev->layout != mddev->new_layout) | |
3965 | return sprintf(page, "%d (%d)\n", | |
3966 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3967 | return sprintf(page, "%d\n", mddev->layout); |
3968 | } | |
3969 | ||
3970 | static ssize_t | |
fd01b88c | 3971 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3972 | { |
4c9309c0 | 3973 | unsigned int n; |
6791875e | 3974 | int err; |
d4dbd025 | 3975 | |
4c9309c0 AD |
3976 | err = kstrtouint(buf, 10, &n); |
3977 | if (err < 0) | |
3978 | return err; | |
6791875e N |
3979 | err = mddev_lock(mddev); |
3980 | if (err) | |
3981 | return err; | |
d4dbd025 | 3982 | |
b3546035 | 3983 | if (mddev->pers) { |
50ac168a | 3984 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3985 | err = -EBUSY; |
3986 | else if (mddev->ro) | |
3987 | err = -EROFS; | |
3988 | else { | |
3989 | mddev->new_layout = n; | |
3990 | err = mddev->pers->check_reshape(mddev); | |
3991 | if (err) | |
3992 | mddev->new_layout = mddev->layout; | |
597a711b | 3993 | } |
b3546035 | 3994 | } else { |
08a02ecd | 3995 | mddev->new_layout = n; |
b3546035 N |
3996 | if (mddev->reshape_position == MaxSector) |
3997 | mddev->layout = n; | |
3998 | } | |
6791875e N |
3999 | mddev_unlock(mddev); |
4000 | return err ?: len; | |
d4dbd025 N |
4001 | } |
4002 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 4003 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 4004 | |
eae1701f | 4005 | static ssize_t |
fd01b88c | 4006 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 4007 | { |
bb636547 N |
4008 | if (mddev->raid_disks == 0) |
4009 | return 0; | |
08a02ecd N |
4010 | if (mddev->reshape_position != MaxSector && |
4011 | mddev->delta_disks != 0) | |
4012 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
4013 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
4014 | return sprintf(page, "%d\n", mddev->raid_disks); |
4015 | } | |
4016 | ||
fd01b88c | 4017 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
4018 | |
4019 | static ssize_t | |
fd01b88c | 4020 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 4021 | { |
4c9309c0 | 4022 | unsigned int n; |
6791875e | 4023 | int err; |
da943b99 | 4024 | |
4c9309c0 AD |
4025 | err = kstrtouint(buf, 10, &n); |
4026 | if (err < 0) | |
4027 | return err; | |
da943b99 | 4028 | |
6791875e N |
4029 | err = mddev_lock(mddev); |
4030 | if (err) | |
4031 | return err; | |
da943b99 | 4032 | if (mddev->pers) |
6791875e | 4033 | err = update_raid_disks(mddev, n); |
08a02ecd | 4034 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4035 | struct md_rdev *rdev; |
08a02ecd | 4036 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4037 | |
6791875e | 4038 | err = -EINVAL; |
c6563a8c N |
4039 | rdev_for_each(rdev, mddev) { |
4040 | if (olddisks < n && | |
4041 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4042 | goto out_unlock; |
c6563a8c N |
4043 | if (olddisks > n && |
4044 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4045 | goto out_unlock; |
c6563a8c | 4046 | } |
6791875e | 4047 | err = 0; |
08a02ecd N |
4048 | mddev->delta_disks = n - olddisks; |
4049 | mddev->raid_disks = n; | |
2c810cdd | 4050 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4051 | } else |
da943b99 | 4052 | mddev->raid_disks = n; |
6791875e N |
4053 | out_unlock: |
4054 | mddev_unlock(mddev); | |
4055 | return err ? err : len; | |
da943b99 N |
4056 | } |
4057 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4058 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4059 | |
3b34380a | 4060 | static ssize_t |
fd01b88c | 4061 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4062 | { |
08a02ecd | 4063 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4064 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4065 | return sprintf(page, "%d (%d)\n", | |
4066 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4067 | mddev->chunk_sectors << 9); |
4068 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4069 | } |
4070 | ||
4071 | static ssize_t | |
fd01b88c | 4072 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4073 | { |
4c9309c0 | 4074 | unsigned long n; |
6791875e | 4075 | int err; |
3b34380a | 4076 | |
4c9309c0 AD |
4077 | err = kstrtoul(buf, 10, &n); |
4078 | if (err < 0) | |
4079 | return err; | |
3b34380a | 4080 | |
6791875e N |
4081 | err = mddev_lock(mddev); |
4082 | if (err) | |
4083 | return err; | |
b3546035 | 4084 | if (mddev->pers) { |
50ac168a | 4085 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4086 | err = -EBUSY; |
4087 | else if (mddev->ro) | |
4088 | err = -EROFS; | |
4089 | else { | |
4090 | mddev->new_chunk_sectors = n >> 9; | |
4091 | err = mddev->pers->check_reshape(mddev); | |
4092 | if (err) | |
4093 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4094 | } |
b3546035 | 4095 | } else { |
664e7c41 | 4096 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4097 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4098 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4099 | } |
6791875e N |
4100 | mddev_unlock(mddev); |
4101 | return err ?: len; | |
3b34380a N |
4102 | } |
4103 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4104 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4105 | |
a94213b1 | 4106 | static ssize_t |
fd01b88c | 4107 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4108 | { |
d1a7c503 N |
4109 | if (mddev->recovery_cp == MaxSector) |
4110 | return sprintf(page, "none\n"); | |
a94213b1 N |
4111 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4112 | } | |
4113 | ||
4114 | static ssize_t | |
fd01b88c | 4115 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4116 | { |
4c9309c0 | 4117 | unsigned long long n; |
6791875e | 4118 | int err; |
4c9309c0 AD |
4119 | |
4120 | if (cmd_match(buf, "none")) | |
4121 | n = MaxSector; | |
4122 | else { | |
4123 | err = kstrtoull(buf, 10, &n); | |
4124 | if (err < 0) | |
4125 | return err; | |
4126 | if (n != (sector_t)n) | |
4127 | return -EINVAL; | |
4128 | } | |
a94213b1 | 4129 | |
6791875e N |
4130 | err = mddev_lock(mddev); |
4131 | if (err) | |
4132 | return err; | |
b098636c | 4133 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4134 | err = -EBUSY; |
a94213b1 | 4135 | |
6791875e N |
4136 | if (!err) { |
4137 | mddev->recovery_cp = n; | |
4138 | if (mddev->pers) | |
2953079c | 4139 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4140 | } |
4141 | mddev_unlock(mddev); | |
4142 | return err ?: len; | |
a94213b1 N |
4143 | } |
4144 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4145 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4146 | resync_start_show, resync_start_store); | |
a94213b1 | 4147 | |
9e653b63 N |
4148 | /* |
4149 | * The array state can be: | |
4150 | * | |
4151 | * clear | |
4152 | * No devices, no size, no level | |
4153 | * Equivalent to STOP_ARRAY ioctl | |
4154 | * inactive | |
4155 | * May have some settings, but array is not active | |
4156 | * all IO results in error | |
4157 | * When written, doesn't tear down array, but just stops it | |
4158 | * suspended (not supported yet) | |
4159 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4160 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4161 | * readonly |
4162 | * no resync can happen. no superblocks get written. | |
4163 | * write requests fail | |
4164 | * read-auto | |
4165 | * like readonly, but behaves like 'clean' on a write request. | |
4166 | * | |
4167 | * clean - no pending writes, but otherwise active. | |
4168 | * When written to inactive array, starts without resync | |
4169 | * If a write request arrives then | |
4170 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4171 | * if not known, block and switch to write-pending | |
4172 | * If written to an active array that has pending writes, then fails. | |
4173 | * active | |
4174 | * fully active: IO and resync can be happening. | |
4175 | * When written to inactive array, starts with resync | |
4176 | * | |
4177 | * write-pending | |
4178 | * clean, but writes are blocked waiting for 'active' to be written. | |
4179 | * | |
4180 | * active-idle | |
4181 | * like active, but no writes have been seen for a while (100msec). | |
4182 | * | |
62f7b198 GP |
4183 | * broken |
4184 | * RAID0/LINEAR-only: same as clean, but array is missing a member. | |
4185 | * It's useful because RAID0/LINEAR mounted-arrays aren't stopped | |
4186 | * when a member is gone, so this state will at least alert the | |
4187 | * user that something is wrong. | |
9e653b63 N |
4188 | */ |
4189 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
62f7b198 | 4190 | write_pending, active_idle, broken, bad_word}; |
05381954 | 4191 | static char *array_states[] = { |
9e653b63 | 4192 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
62f7b198 | 4193 | "write-pending", "active-idle", "broken", NULL }; |
9e653b63 N |
4194 | |
4195 | static int match_word(const char *word, char **list) | |
4196 | { | |
4197 | int n; | |
4198 | for (n=0; list[n]; n++) | |
4199 | if (cmd_match(word, list[n])) | |
4200 | break; | |
4201 | return n; | |
4202 | } | |
4203 | ||
4204 | static ssize_t | |
fd01b88c | 4205 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4206 | { |
4207 | enum array_state st = inactive; | |
4208 | ||
62f7b198 | 4209 | if (mddev->pers && !test_bit(MD_NOT_READY, &mddev->flags)) { |
9e653b63 N |
4210 | switch(mddev->ro) { |
4211 | case 1: | |
4212 | st = readonly; | |
4213 | break; | |
4214 | case 2: | |
4215 | st = read_auto; | |
4216 | break; | |
4217 | case 0: | |
55cc39f3 | 4218 | spin_lock(&mddev->lock); |
2953079c | 4219 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4220 | st = write_pending; |
16f88949 TM |
4221 | else if (mddev->in_sync) |
4222 | st = clean; | |
9e653b63 N |
4223 | else if (mddev->safemode) |
4224 | st = active_idle; | |
4225 | else | |
4226 | st = active; | |
55cc39f3 | 4227 | spin_unlock(&mddev->lock); |
9e653b63 | 4228 | } |
62f7b198 GP |
4229 | |
4230 | if (test_bit(MD_BROKEN, &mddev->flags) && st == clean) | |
4231 | st = broken; | |
4232 | } else { | |
9e653b63 N |
4233 | if (list_empty(&mddev->disks) && |
4234 | mddev->raid_disks == 0 && | |
58c0fed4 | 4235 | mddev->dev_sectors == 0) |
9e653b63 N |
4236 | st = clear; |
4237 | else | |
4238 | st = inactive; | |
4239 | } | |
4240 | return sprintf(page, "%s\n", array_states[st]); | |
4241 | } | |
4242 | ||
f72ffdd6 N |
4243 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4244 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4245 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4246 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4247 | |
4248 | static ssize_t | |
fd01b88c | 4249 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4250 | { |
6497709b | 4251 | int err = 0; |
9e653b63 | 4252 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4253 | |
4254 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4255 | /* don't take reconfig_mutex when toggling between | |
4256 | * clean and active | |
4257 | */ | |
4258 | spin_lock(&mddev->lock); | |
4259 | if (st == active) { | |
4260 | restart_array(mddev); | |
2953079c | 4261 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4262 | md_wakeup_thread(mddev->thread); |
6791875e | 4263 | wake_up(&mddev->sb_wait); |
6791875e N |
4264 | } else /* st == clean */ { |
4265 | restart_array(mddev); | |
6497709b | 4266 | if (!set_in_sync(mddev)) |
6791875e N |
4267 | err = -EBUSY; |
4268 | } | |
573275b5 TM |
4269 | if (!err) |
4270 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4271 | spin_unlock(&mddev->lock); |
c008f1d3 | 4272 | return err ?: len; |
6791875e N |
4273 | } |
4274 | err = mddev_lock(mddev); | |
4275 | if (err) | |
4276 | return err; | |
4277 | err = -EINVAL; | |
9e653b63 N |
4278 | switch(st) { |
4279 | case bad_word: | |
4280 | break; | |
4281 | case clear: | |
4282 | /* stopping an active array */ | |
a05b7ea0 | 4283 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4284 | break; |
4285 | case inactive: | |
4286 | /* stopping an active array */ | |
90cf195d | 4287 | if (mddev->pers) |
a05b7ea0 | 4288 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4289 | else |
e691063a | 4290 | err = 0; /* already inactive */ |
9e653b63 N |
4291 | break; |
4292 | case suspended: | |
4293 | break; /* not supported yet */ | |
4294 | case readonly: | |
4295 | if (mddev->pers) | |
a05b7ea0 | 4296 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4297 | else { |
4298 | mddev->ro = 1; | |
648b629e | 4299 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4300 | err = do_md_run(mddev); |
4301 | } | |
4302 | break; | |
4303 | case read_auto: | |
9e653b63 | 4304 | if (mddev->pers) { |
80268ee9 | 4305 | if (mddev->ro == 0) |
a05b7ea0 | 4306 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4307 | else if (mddev->ro == 1) |
648b629e N |
4308 | err = restart_array(mddev); |
4309 | if (err == 0) { | |
4310 | mddev->ro = 2; | |
4311 | set_disk_ro(mddev->gendisk, 0); | |
4312 | } | |
9e653b63 N |
4313 | } else { |
4314 | mddev->ro = 2; | |
4315 | err = do_md_run(mddev); | |
4316 | } | |
4317 | break; | |
4318 | case clean: | |
4319 | if (mddev->pers) { | |
339421de SL |
4320 | err = restart_array(mddev); |
4321 | if (err) | |
4322 | break; | |
85572d7c | 4323 | spin_lock(&mddev->lock); |
6497709b | 4324 | if (!set_in_sync(mddev)) |
e691063a | 4325 | err = -EBUSY; |
85572d7c | 4326 | spin_unlock(&mddev->lock); |
5bf29597 N |
4327 | } else |
4328 | err = -EINVAL; | |
9e653b63 N |
4329 | break; |
4330 | case active: | |
4331 | if (mddev->pers) { | |
339421de SL |
4332 | err = restart_array(mddev); |
4333 | if (err) | |
4334 | break; | |
2953079c | 4335 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4336 | wake_up(&mddev->sb_wait); |
4337 | err = 0; | |
4338 | } else { | |
4339 | mddev->ro = 0; | |
648b629e | 4340 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4341 | err = do_md_run(mddev); |
4342 | } | |
4343 | break; | |
4344 | case write_pending: | |
4345 | case active_idle: | |
62f7b198 | 4346 | case broken: |
9e653b63 N |
4347 | /* these cannot be set */ |
4348 | break; | |
4349 | } | |
6791875e N |
4350 | |
4351 | if (!err) { | |
1d23f178 N |
4352 | if (mddev->hold_active == UNTIL_IOCTL) |
4353 | mddev->hold_active = 0; | |
00bcb4ac | 4354 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4355 | } |
6791875e N |
4356 | mddev_unlock(mddev); |
4357 | return err ?: len; | |
9e653b63 | 4358 | } |
80ca3a44 | 4359 | static struct md_sysfs_entry md_array_state = |
750f199e | 4360 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4361 | |
1e50915f | 4362 | static ssize_t |
fd01b88c | 4363 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4364 | return sprintf(page, "%d\n", |
4365 | atomic_read(&mddev->max_corr_read_errors)); | |
4366 | } | |
4367 | ||
4368 | static ssize_t | |
fd01b88c | 4369 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4370 | { |
4c9309c0 AD |
4371 | unsigned int n; |
4372 | int rv; | |
1e50915f | 4373 | |
4c9309c0 AD |
4374 | rv = kstrtouint(buf, 10, &n); |
4375 | if (rv < 0) | |
4376 | return rv; | |
4377 | atomic_set(&mddev->max_corr_read_errors, n); | |
4378 | return len; | |
1e50915f RB |
4379 | } |
4380 | ||
4381 | static struct md_sysfs_entry max_corr_read_errors = | |
4382 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4383 | max_corrected_read_errors_store); | |
4384 | ||
6d7ff738 | 4385 | static ssize_t |
fd01b88c | 4386 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4387 | { |
4388 | return -EINVAL; | |
4389 | } | |
4390 | ||
4391 | static ssize_t | |
fd01b88c | 4392 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4393 | { |
4394 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4395 | /* The new device is added to the array. | |
4396 | * If the array has a persistent superblock, we read the | |
4397 | * superblock to initialise info and check validity. | |
4398 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4399 | * which mainly checks size. | |
4400 | */ | |
4401 | char *e; | |
4402 | int major = simple_strtoul(buf, &e, 10); | |
4403 | int minor; | |
4404 | dev_t dev; | |
3cb03002 | 4405 | struct md_rdev *rdev; |
6d7ff738 N |
4406 | int err; |
4407 | ||
4408 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4409 | return -EINVAL; | |
4410 | minor = simple_strtoul(e+1, &e, 10); | |
4411 | if (*e && *e != '\n') | |
4412 | return -EINVAL; | |
4413 | dev = MKDEV(major, minor); | |
4414 | if (major != MAJOR(dev) || | |
4415 | minor != MINOR(dev)) | |
4416 | return -EOVERFLOW; | |
4417 | ||
6791875e N |
4418 | flush_workqueue(md_misc_wq); |
4419 | ||
4420 | err = mddev_lock(mddev); | |
4421 | if (err) | |
4422 | return err; | |
6d7ff738 N |
4423 | if (mddev->persistent) { |
4424 | rdev = md_import_device(dev, mddev->major_version, | |
4425 | mddev->minor_version); | |
4426 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4427 | struct md_rdev *rdev0 |
4428 | = list_entry(mddev->disks.next, | |
4429 | struct md_rdev, same_set); | |
6d7ff738 N |
4430 | err = super_types[mddev->major_version] |
4431 | .load_super(rdev, rdev0, mddev->minor_version); | |
4432 | if (err < 0) | |
4433 | goto out; | |
4434 | } | |
c5d79adb N |
4435 | } else if (mddev->external) |
4436 | rdev = md_import_device(dev, -2, -1); | |
4437 | else | |
6d7ff738 N |
4438 | rdev = md_import_device(dev, -1, -1); |
4439 | ||
9a8c0fa8 N |
4440 | if (IS_ERR(rdev)) { |
4441 | mddev_unlock(mddev); | |
6d7ff738 | 4442 | return PTR_ERR(rdev); |
9a8c0fa8 | 4443 | } |
6d7ff738 N |
4444 | err = bind_rdev_to_array(rdev, mddev); |
4445 | out: | |
4446 | if (err) | |
4447 | export_rdev(rdev); | |
6791875e | 4448 | mddev_unlock(mddev); |
5492c46e AO |
4449 | if (!err) |
4450 | md_new_event(mddev); | |
6d7ff738 N |
4451 | return err ? err : len; |
4452 | } | |
4453 | ||
4454 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4455 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4456 | |
9b1d1dac | 4457 | static ssize_t |
fd01b88c | 4458 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4459 | { |
4460 | char *end; | |
4461 | unsigned long chunk, end_chunk; | |
6791875e | 4462 | int err; |
9b1d1dac | 4463 | |
6791875e N |
4464 | err = mddev_lock(mddev); |
4465 | if (err) | |
4466 | return err; | |
9b1d1dac PC |
4467 | if (!mddev->bitmap) |
4468 | goto out; | |
4469 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4470 | while (*buf) { | |
4471 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4472 | if (buf == end) break; | |
4473 | if (*end == '-') { /* range */ | |
4474 | buf = end + 1; | |
4475 | end_chunk = simple_strtoul(buf, &end, 0); | |
4476 | if (buf == end) break; | |
4477 | } | |
4478 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4479 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4480 | buf = skip_spaces(end); |
9b1d1dac | 4481 | } |
e64e4018 | 4482 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4483 | out: |
6791875e | 4484 | mddev_unlock(mddev); |
9b1d1dac PC |
4485 | return len; |
4486 | } | |
4487 | ||
4488 | static struct md_sysfs_entry md_bitmap = | |
4489 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4490 | ||
a35b0d69 | 4491 | static ssize_t |
fd01b88c | 4492 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4493 | { |
58c0fed4 AN |
4494 | return sprintf(page, "%llu\n", |
4495 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4496 | } |
4497 | ||
fd01b88c | 4498 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4499 | |
4500 | static ssize_t | |
fd01b88c | 4501 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4502 | { |
4503 | /* If array is inactive, we can reduce the component size, but | |
4504 | * not increase it (except from 0). | |
4505 | * If array is active, we can try an on-line resize | |
4506 | */ | |
b522adcd DW |
4507 | sector_t sectors; |
4508 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4509 | |
58c0fed4 AN |
4510 | if (err < 0) |
4511 | return err; | |
6791875e N |
4512 | err = mddev_lock(mddev); |
4513 | if (err) | |
4514 | return err; | |
a35b0d69 | 4515 | if (mddev->pers) { |
58c0fed4 | 4516 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4517 | if (err == 0) |
4518 | md_update_sb(mddev, 1); | |
a35b0d69 | 4519 | } else { |
58c0fed4 AN |
4520 | if (mddev->dev_sectors == 0 || |
4521 | mddev->dev_sectors > sectors) | |
4522 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4523 | else |
4524 | err = -ENOSPC; | |
4525 | } | |
6791875e | 4526 | mddev_unlock(mddev); |
a35b0d69 N |
4527 | return err ? err : len; |
4528 | } | |
4529 | ||
4530 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4531 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4532 | |
83f0d77a | 4533 | /* Metadata version. |
e691063a N |
4534 | * This is one of |
4535 | * 'none' for arrays with no metadata (good luck...) | |
4536 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4537 | * or N.M for internally known formats |
4538 | */ | |
4539 | static ssize_t | |
fd01b88c | 4540 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4541 | { |
4542 | if (mddev->persistent) | |
4543 | return sprintf(page, "%d.%d\n", | |
4544 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4545 | else if (mddev->external) |
4546 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4547 | else |
4548 | return sprintf(page, "none\n"); | |
4549 | } | |
4550 | ||
4551 | static ssize_t | |
fd01b88c | 4552 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4553 | { |
4554 | int major, minor; | |
4555 | char *e; | |
6791875e | 4556 | int err; |
ea43ddd8 N |
4557 | /* Changing the details of 'external' metadata is |
4558 | * always permitted. Otherwise there must be | |
4559 | * no devices attached to the array. | |
4560 | */ | |
6791875e N |
4561 | |
4562 | err = mddev_lock(mddev); | |
4563 | if (err) | |
4564 | return err; | |
4565 | err = -EBUSY; | |
ea43ddd8 N |
4566 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4567 | ; | |
4568 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4569 | goto out_unlock; |
8bb93aac | 4570 | |
6791875e | 4571 | err = 0; |
8bb93aac N |
4572 | if (cmd_match(buf, "none")) { |
4573 | mddev->persistent = 0; | |
e691063a N |
4574 | mddev->external = 0; |
4575 | mddev->major_version = 0; | |
4576 | mddev->minor_version = 90; | |
6791875e | 4577 | goto out_unlock; |
e691063a N |
4578 | } |
4579 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4580 | size_t namelen = len-9; |
e691063a N |
4581 | if (namelen >= sizeof(mddev->metadata_type)) |
4582 | namelen = sizeof(mddev->metadata_type)-1; | |
4583 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4584 | mddev->metadata_type[namelen] = 0; | |
4585 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4586 | mddev->metadata_type[--namelen] = 0; | |
4587 | mddev->persistent = 0; | |
4588 | mddev->external = 1; | |
8bb93aac N |
4589 | mddev->major_version = 0; |
4590 | mddev->minor_version = 90; | |
6791875e | 4591 | goto out_unlock; |
8bb93aac N |
4592 | } |
4593 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4594 | err = -EINVAL; |
8bb93aac | 4595 | if (e==buf || *e != '.') |
6791875e | 4596 | goto out_unlock; |
8bb93aac N |
4597 | buf = e+1; |
4598 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4599 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4600 | goto out_unlock; |
4601 | err = -ENOENT; | |
50511da3 | 4602 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4603 | goto out_unlock; |
8bb93aac N |
4604 | mddev->major_version = major; |
4605 | mddev->minor_version = minor; | |
4606 | mddev->persistent = 1; | |
e691063a | 4607 | mddev->external = 0; |
6791875e N |
4608 | err = 0; |
4609 | out_unlock: | |
4610 | mddev_unlock(mddev); | |
4611 | return err ?: len; | |
8bb93aac N |
4612 | } |
4613 | ||
4614 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4615 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4616 | |
24dd469d | 4617 | static ssize_t |
fd01b88c | 4618 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4619 | { |
7eec314d | 4620 | char *type = "idle"; |
b7b17c9b N |
4621 | unsigned long recovery = mddev->recovery; |
4622 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4623 | type = "frozen"; |
b7b17c9b N |
4624 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4625 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4626 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4627 | type = "reshape"; |
b7b17c9b N |
4628 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4629 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4630 | type = "resync"; |
b7b17c9b | 4631 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4632 | type = "check"; |
4633 | else | |
4634 | type = "repair"; | |
b7b17c9b | 4635 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4636 | type = "recover"; |
985ca973 N |
4637 | else if (mddev->reshape_position != MaxSector) |
4638 | type = "reshape"; | |
24dd469d N |
4639 | } |
4640 | return sprintf(page, "%s\n", type); | |
4641 | } | |
4642 | ||
4643 | static ssize_t | |
fd01b88c | 4644 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4645 | { |
7eec314d N |
4646 | if (!mddev->pers || !mddev->pers->sync_request) |
4647 | return -EINVAL; | |
4648 | ||
b6a9ce68 N |
4649 | |
4650 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4651 | if (cmd_match(page, "frozen")) |
4652 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4653 | else | |
4654 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4655 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4656 | mddev_lock(mddev) == 0) { | |
4657 | flush_workqueue(md_misc_wq); | |
4658 | if (mddev->sync_thread) { | |
4659 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4660 | md_reap_sync_thread(mddev); |
6791875e | 4661 | } |
8e8e2518 | 4662 | mddev_unlock(mddev); |
7eec314d | 4663 | } |
312045ee | 4664 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4665 | return -EBUSY; |
72a23c21 | 4666 | else if (cmd_match(page, "resync")) |
56ccc112 | 4667 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4668 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4669 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4670 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4671 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4672 | int err; |
4673 | if (mddev->pers->start_reshape == NULL) | |
4674 | return -EINVAL; | |
6791875e N |
4675 | err = mddev_lock(mddev); |
4676 | if (!err) { | |
312045ee N |
4677 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4678 | err = -EBUSY; | |
4679 | else { | |
4680 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4681 | err = mddev->pers->start_reshape(mddev); | |
4682 | } | |
6791875e N |
4683 | mddev_unlock(mddev); |
4684 | } | |
16484bf5 N |
4685 | if (err) |
4686 | return err; | |
a99ac971 | 4687 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4688 | } else { |
bce74dac | 4689 | if (cmd_match(page, "check")) |
7eec314d | 4690 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4691 | else if (!cmd_match(page, "repair")) |
7eec314d | 4692 | return -EINVAL; |
56ccc112 | 4693 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4694 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4695 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4696 | } |
48c26ddc N |
4697 | if (mddev->ro == 2) { |
4698 | /* A write to sync_action is enough to justify | |
4699 | * canceling read-auto mode | |
4700 | */ | |
4701 | mddev->ro = 0; | |
4702 | md_wakeup_thread(mddev->sync_thread); | |
4703 | } | |
03c902e1 | 4704 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4705 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4706 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4707 | return len; |
4708 | } | |
4709 | ||
c4a39551 | 4710 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4711 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4712 | |
4713 | static ssize_t | |
4714 | last_sync_action_show(struct mddev *mddev, char *page) | |
4715 | { | |
4716 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4717 | } | |
4718 | ||
4719 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4720 | ||
9d88883e | 4721 | static ssize_t |
fd01b88c | 4722 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4723 | { |
4724 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4725 | (unsigned long long) |
4726 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4727 | } |
4728 | ||
80ca3a44 | 4729 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4730 | |
88202a0c | 4731 | static ssize_t |
fd01b88c | 4732 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4733 | { |
4734 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4735 | mddev->sync_speed_min ? "local": "system"); | |
4736 | } | |
4737 | ||
4738 | static ssize_t | |
fd01b88c | 4739 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4740 | { |
4c9309c0 AD |
4741 | unsigned int min; |
4742 | int rv; | |
4743 | ||
88202a0c | 4744 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4745 | min = 0; |
4746 | } else { | |
4747 | rv = kstrtouint(buf, 10, &min); | |
4748 | if (rv < 0) | |
4749 | return rv; | |
4750 | if (min == 0) | |
4751 | return -EINVAL; | |
88202a0c | 4752 | } |
88202a0c N |
4753 | mddev->sync_speed_min = min; |
4754 | return len; | |
4755 | } | |
4756 | ||
4757 | static struct md_sysfs_entry md_sync_min = | |
4758 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4759 | ||
4760 | static ssize_t | |
fd01b88c | 4761 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4762 | { |
4763 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4764 | mddev->sync_speed_max ? "local": "system"); | |
4765 | } | |
4766 | ||
4767 | static ssize_t | |
fd01b88c | 4768 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4769 | { |
4c9309c0 AD |
4770 | unsigned int max; |
4771 | int rv; | |
4772 | ||
88202a0c | 4773 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4774 | max = 0; |
4775 | } else { | |
4776 | rv = kstrtouint(buf, 10, &max); | |
4777 | if (rv < 0) | |
4778 | return rv; | |
4779 | if (max == 0) | |
4780 | return -EINVAL; | |
88202a0c | 4781 | } |
88202a0c N |
4782 | mddev->sync_speed_max = max; |
4783 | return len; | |
4784 | } | |
4785 | ||
4786 | static struct md_sysfs_entry md_sync_max = | |
4787 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4788 | ||
d7f3d291 | 4789 | static ssize_t |
fd01b88c | 4790 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4791 | { |
4792 | return sprintf(page, "%d\n", mddev->degraded); | |
4793 | } | |
4794 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4795 | |
90b08710 | 4796 | static ssize_t |
fd01b88c | 4797 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4798 | { |
4799 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4800 | } | |
4801 | ||
4802 | static ssize_t | |
fd01b88c | 4803 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4804 | { |
4805 | long n; | |
4806 | ||
b29bebd6 | 4807 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4808 | return -EINVAL; |
4809 | ||
4810 | if (n != 0 && n != 1) | |
4811 | return -EINVAL; | |
4812 | ||
4813 | mddev->parallel_resync = n; | |
4814 | ||
4815 | if (mddev->sync_thread) | |
4816 | wake_up(&resync_wait); | |
4817 | ||
4818 | return len; | |
4819 | } | |
4820 | ||
4821 | /* force parallel resync, even with shared block devices */ | |
4822 | static struct md_sysfs_entry md_sync_force_parallel = | |
4823 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4824 | sync_force_parallel_show, sync_force_parallel_store); | |
4825 | ||
88202a0c | 4826 | static ssize_t |
fd01b88c | 4827 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4828 | { |
4829 | unsigned long resync, dt, db; | |
d1a7c503 N |
4830 | if (mddev->curr_resync == 0) |
4831 | return sprintf(page, "none\n"); | |
9687a60c AN |
4832 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4833 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4834 | if (!dt) dt++; |
9687a60c AN |
4835 | db = resync - mddev->resync_mark_cnt; |
4836 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4837 | } |
4838 | ||
80ca3a44 | 4839 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4840 | |
4841 | static ssize_t | |
fd01b88c | 4842 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4843 | { |
13ae864b | 4844 | unsigned long long max_sectors, resync; |
88202a0c | 4845 | |
acb180b0 N |
4846 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4847 | return sprintf(page, "none\n"); | |
4848 | ||
72f36d59 N |
4849 | if (mddev->curr_resync == 1 || |
4850 | mddev->curr_resync == 2) | |
4851 | return sprintf(page, "delayed\n"); | |
4852 | ||
c804cdec N |
4853 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4854 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4855 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4856 | else |
58c0fed4 | 4857 | max_sectors = mddev->dev_sectors; |
88202a0c | 4858 | |
acb180b0 | 4859 | resync = mddev->curr_resync_completed; |
13ae864b | 4860 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4861 | } |
4862 | ||
750f199e N |
4863 | static struct md_sysfs_entry md_sync_completed = |
4864 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4865 | |
5e96ee65 | 4866 | static ssize_t |
fd01b88c | 4867 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4868 | { |
4869 | return sprintf(page, "%llu\n", | |
4870 | (unsigned long long)mddev->resync_min); | |
4871 | } | |
4872 | static ssize_t | |
fd01b88c | 4873 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4874 | { |
4875 | unsigned long long min; | |
23da422b | 4876 | int err; |
23da422b | 4877 | |
b29bebd6 | 4878 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4879 | return -EINVAL; |
23da422b N |
4880 | |
4881 | spin_lock(&mddev->lock); | |
4882 | err = -EINVAL; | |
5e96ee65 | 4883 | if (min > mddev->resync_max) |
23da422b N |
4884 | goto out_unlock; |
4885 | ||
4886 | err = -EBUSY; | |
5e96ee65 | 4887 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4888 | goto out_unlock; |
5e96ee65 | 4889 | |
50c37b13 N |
4890 | /* Round down to multiple of 4K for safety */ |
4891 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4892 | err = 0; |
5e96ee65 | 4893 | |
23da422b N |
4894 | out_unlock: |
4895 | spin_unlock(&mddev->lock); | |
4896 | return err ?: len; | |
5e96ee65 NB |
4897 | } |
4898 | ||
4899 | static struct md_sysfs_entry md_min_sync = | |
4900 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4901 | ||
c6207277 | 4902 | static ssize_t |
fd01b88c | 4903 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4904 | { |
4905 | if (mddev->resync_max == MaxSector) | |
4906 | return sprintf(page, "max\n"); | |
4907 | else | |
4908 | return sprintf(page, "%llu\n", | |
4909 | (unsigned long long)mddev->resync_max); | |
4910 | } | |
4911 | static ssize_t | |
fd01b88c | 4912 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4913 | { |
23da422b N |
4914 | int err; |
4915 | spin_lock(&mddev->lock); | |
c6207277 N |
4916 | if (strncmp(buf, "max", 3) == 0) |
4917 | mddev->resync_max = MaxSector; | |
4918 | else { | |
5e96ee65 | 4919 | unsigned long long max; |
23da422b N |
4920 | int chunk; |
4921 | ||
4922 | err = -EINVAL; | |
b29bebd6 | 4923 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4924 | goto out_unlock; |
5e96ee65 | 4925 | if (max < mddev->resync_min) |
23da422b N |
4926 | goto out_unlock; |
4927 | ||
4928 | err = -EBUSY; | |
c6207277 | 4929 | if (max < mddev->resync_max && |
4d484a4a | 4930 | mddev->ro == 0 && |
c6207277 | 4931 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4932 | goto out_unlock; |
c6207277 N |
4933 | |
4934 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4935 | chunk = mddev->chunk_sectors; |
4936 | if (chunk) { | |
2ac06c33 | 4937 | sector_t temp = max; |
23da422b N |
4938 | |
4939 | err = -EINVAL; | |
4940 | if (sector_div(temp, chunk)) | |
4941 | goto out_unlock; | |
c6207277 N |
4942 | } |
4943 | mddev->resync_max = max; | |
4944 | } | |
4945 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4946 | err = 0; |
4947 | out_unlock: | |
4948 | spin_unlock(&mddev->lock); | |
4949 | return err ?: len; | |
c6207277 N |
4950 | } |
4951 | ||
4952 | static struct md_sysfs_entry md_max_sync = | |
4953 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4954 | ||
e464eafd | 4955 | static ssize_t |
fd01b88c | 4956 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4957 | { |
4958 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4959 | } | |
4960 | ||
4961 | static ssize_t | |
fd01b88c | 4962 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4963 | { |
b03e0ccb | 4964 | unsigned long long new; |
6791875e | 4965 | int err; |
e464eafd | 4966 | |
4c9309c0 AD |
4967 | err = kstrtoull(buf, 10, &new); |
4968 | if (err < 0) | |
4969 | return err; | |
4970 | if (new != (sector_t)new) | |
e464eafd | 4971 | return -EINVAL; |
23ddff37 | 4972 | |
6791875e N |
4973 | err = mddev_lock(mddev); |
4974 | if (err) | |
4975 | return err; | |
4976 | err = -EINVAL; | |
4977 | if (mddev->pers == NULL || | |
4978 | mddev->pers->quiesce == NULL) | |
4979 | goto unlock; | |
b03e0ccb | 4980 | mddev_suspend(mddev); |
23ddff37 | 4981 | mddev->suspend_lo = new; |
b03e0ccb N |
4982 | mddev_resume(mddev); |
4983 | ||
6791875e N |
4984 | err = 0; |
4985 | unlock: | |
4986 | mddev_unlock(mddev); | |
4987 | return err ?: len; | |
e464eafd N |
4988 | } |
4989 | static struct md_sysfs_entry md_suspend_lo = | |
4990 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4991 | ||
e464eafd | 4992 | static ssize_t |
fd01b88c | 4993 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4994 | { |
4995 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4996 | } | |
4997 | ||
4998 | static ssize_t | |
fd01b88c | 4999 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 5000 | { |
b03e0ccb | 5001 | unsigned long long new; |
6791875e | 5002 | int err; |
e464eafd | 5003 | |
4c9309c0 AD |
5004 | err = kstrtoull(buf, 10, &new); |
5005 | if (err < 0) | |
5006 | return err; | |
5007 | if (new != (sector_t)new) | |
e464eafd | 5008 | return -EINVAL; |
23ddff37 | 5009 | |
6791875e N |
5010 | err = mddev_lock(mddev); |
5011 | if (err) | |
5012 | return err; | |
5013 | err = -EINVAL; | |
b03e0ccb | 5014 | if (mddev->pers == NULL) |
6791875e | 5015 | goto unlock; |
b03e0ccb N |
5016 | |
5017 | mddev_suspend(mddev); | |
23ddff37 | 5018 | mddev->suspend_hi = new; |
b03e0ccb N |
5019 | mddev_resume(mddev); |
5020 | ||
6791875e N |
5021 | err = 0; |
5022 | unlock: | |
5023 | mddev_unlock(mddev); | |
5024 | return err ?: len; | |
e464eafd N |
5025 | } |
5026 | static struct md_sysfs_entry md_suspend_hi = | |
5027 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
5028 | ||
08a02ecd | 5029 | static ssize_t |
fd01b88c | 5030 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
5031 | { |
5032 | if (mddev->reshape_position != MaxSector) | |
5033 | return sprintf(page, "%llu\n", | |
5034 | (unsigned long long)mddev->reshape_position); | |
5035 | strcpy(page, "none\n"); | |
5036 | return 5; | |
5037 | } | |
5038 | ||
5039 | static ssize_t | |
fd01b88c | 5040 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5041 | { |
c6563a8c | 5042 | struct md_rdev *rdev; |
4c9309c0 | 5043 | unsigned long long new; |
6791875e | 5044 | int err; |
6791875e | 5045 | |
4c9309c0 AD |
5046 | err = kstrtoull(buf, 10, &new); |
5047 | if (err < 0) | |
5048 | return err; | |
5049 | if (new != (sector_t)new) | |
08a02ecd | 5050 | return -EINVAL; |
6791875e N |
5051 | err = mddev_lock(mddev); |
5052 | if (err) | |
5053 | return err; | |
5054 | err = -EBUSY; | |
5055 | if (mddev->pers) | |
5056 | goto unlock; | |
08a02ecd N |
5057 | mddev->reshape_position = new; |
5058 | mddev->delta_disks = 0; | |
2c810cdd | 5059 | mddev->reshape_backwards = 0; |
08a02ecd N |
5060 | mddev->new_level = mddev->level; |
5061 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5062 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5063 | rdev_for_each(rdev, mddev) |
5064 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5065 | err = 0; |
5066 | unlock: | |
5067 | mddev_unlock(mddev); | |
5068 | return err ?: len; | |
08a02ecd N |
5069 | } |
5070 | ||
5071 | static struct md_sysfs_entry md_reshape_position = | |
5072 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5073 | reshape_position_store); | |
5074 | ||
2c810cdd N |
5075 | static ssize_t |
5076 | reshape_direction_show(struct mddev *mddev, char *page) | |
5077 | { | |
5078 | return sprintf(page, "%s\n", | |
5079 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5080 | } | |
5081 | ||
5082 | static ssize_t | |
5083 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5084 | { | |
5085 | int backwards = 0; | |
6791875e N |
5086 | int err; |
5087 | ||
2c810cdd N |
5088 | if (cmd_match(buf, "forwards")) |
5089 | backwards = 0; | |
5090 | else if (cmd_match(buf, "backwards")) | |
5091 | backwards = 1; | |
5092 | else | |
5093 | return -EINVAL; | |
5094 | if (mddev->reshape_backwards == backwards) | |
5095 | return len; | |
5096 | ||
6791875e N |
5097 | err = mddev_lock(mddev); |
5098 | if (err) | |
5099 | return err; | |
2c810cdd N |
5100 | /* check if we are allowed to change */ |
5101 | if (mddev->delta_disks) | |
6791875e N |
5102 | err = -EBUSY; |
5103 | else if (mddev->persistent && | |
2c810cdd | 5104 | mddev->major_version == 0) |
6791875e N |
5105 | err = -EINVAL; |
5106 | else | |
5107 | mddev->reshape_backwards = backwards; | |
5108 | mddev_unlock(mddev); | |
5109 | return err ?: len; | |
2c810cdd N |
5110 | } |
5111 | ||
5112 | static struct md_sysfs_entry md_reshape_direction = | |
5113 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5114 | reshape_direction_store); | |
5115 | ||
b522adcd | 5116 | static ssize_t |
fd01b88c | 5117 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5118 | { |
5119 | if (mddev->external_size) | |
5120 | return sprintf(page, "%llu\n", | |
5121 | (unsigned long long)mddev->array_sectors/2); | |
5122 | else | |
5123 | return sprintf(page, "default\n"); | |
5124 | } | |
5125 | ||
5126 | static ssize_t | |
fd01b88c | 5127 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5128 | { |
5129 | sector_t sectors; | |
6791875e N |
5130 | int err; |
5131 | ||
5132 | err = mddev_lock(mddev); | |
5133 | if (err) | |
5134 | return err; | |
b522adcd | 5135 | |
ab5a98b1 | 5136 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5137 | if (mddev_is_clustered(mddev)) { |
5138 | mddev_unlock(mddev); | |
ab5a98b1 | 5139 | return -EINVAL; |
b670883b | 5140 | } |
ab5a98b1 | 5141 | |
b522adcd DW |
5142 | if (strncmp(buf, "default", 7) == 0) { |
5143 | if (mddev->pers) | |
5144 | sectors = mddev->pers->size(mddev, 0, 0); | |
5145 | else | |
5146 | sectors = mddev->array_sectors; | |
5147 | ||
5148 | mddev->external_size = 0; | |
5149 | } else { | |
5150 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5151 | err = -EINVAL; |
5152 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5153 | err = -E2BIG; | |
5154 | else | |
5155 | mddev->external_size = 1; | |
b522adcd DW |
5156 | } |
5157 | ||
6791875e N |
5158 | if (!err) { |
5159 | mddev->array_sectors = sectors; | |
5160 | if (mddev->pers) { | |
5161 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5162 | revalidate_disk(mddev->gendisk); | |
5163 | } | |
cbe6ef1d | 5164 | } |
6791875e N |
5165 | mddev_unlock(mddev); |
5166 | return err ?: len; | |
b522adcd DW |
5167 | } |
5168 | ||
5169 | static struct md_sysfs_entry md_array_size = | |
5170 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5171 | array_size_store); | |
e464eafd | 5172 | |
664aed04 AP |
5173 | static ssize_t |
5174 | consistency_policy_show(struct mddev *mddev, char *page) | |
5175 | { | |
5176 | int ret; | |
5177 | ||
5178 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5179 | ret = sprintf(page, "journal\n"); | |
5180 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5181 | ret = sprintf(page, "ppl\n"); | |
5182 | } else if (mddev->bitmap) { | |
5183 | ret = sprintf(page, "bitmap\n"); | |
5184 | } else if (mddev->pers) { | |
5185 | if (mddev->pers->sync_request) | |
5186 | ret = sprintf(page, "resync\n"); | |
5187 | else | |
5188 | ret = sprintf(page, "none\n"); | |
5189 | } else { | |
5190 | ret = sprintf(page, "unknown\n"); | |
5191 | } | |
5192 | ||
5193 | return ret; | |
5194 | } | |
5195 | ||
5196 | static ssize_t | |
5197 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5198 | { | |
ba903a3e AP |
5199 | int err = 0; |
5200 | ||
664aed04 | 5201 | if (mddev->pers) { |
ba903a3e AP |
5202 | if (mddev->pers->change_consistency_policy) |
5203 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5204 | else | |
5205 | err = -EBUSY; | |
664aed04 AP |
5206 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5207 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5208 | } else { |
ba903a3e | 5209 | err = -EINVAL; |
664aed04 | 5210 | } |
ba903a3e AP |
5211 | |
5212 | return err ? err : len; | |
664aed04 AP |
5213 | } |
5214 | ||
5215 | static struct md_sysfs_entry md_consistency_policy = | |
5216 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5217 | consistency_policy_store); | |
5218 | ||
9a567843 GJ |
5219 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5220 | { | |
5221 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5222 | } | |
5223 | ||
5224 | /* | |
5225 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5226 | * from RAID1/RAID10. | |
5227 | */ | |
5228 | static ssize_t | |
5229 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5230 | { | |
5231 | int ret; | |
5232 | bool value; | |
5233 | ||
5234 | ret = kstrtobool(buf, &value); | |
5235 | if (ret) | |
5236 | return ret; | |
5237 | ||
5238 | if (value != mddev->fail_last_dev) | |
5239 | mddev->fail_last_dev = value; | |
5240 | ||
5241 | return len; | |
5242 | } | |
5243 | static struct md_sysfs_entry md_fail_last_dev = | |
5244 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5245 | fail_last_dev_store); | |
5246 | ||
eae1701f N |
5247 | static struct attribute *md_default_attrs[] = { |
5248 | &md_level.attr, | |
d4dbd025 | 5249 | &md_layout.attr, |
eae1701f | 5250 | &md_raid_disks.attr, |
3b34380a | 5251 | &md_chunk_size.attr, |
a35b0d69 | 5252 | &md_size.attr, |
a94213b1 | 5253 | &md_resync_start.attr, |
8bb93aac | 5254 | &md_metadata.attr, |
6d7ff738 | 5255 | &md_new_device.attr, |
16f17b39 | 5256 | &md_safe_delay.attr, |
9e653b63 | 5257 | &md_array_state.attr, |
08a02ecd | 5258 | &md_reshape_position.attr, |
2c810cdd | 5259 | &md_reshape_direction.attr, |
b522adcd | 5260 | &md_array_size.attr, |
1e50915f | 5261 | &max_corr_read_errors.attr, |
664aed04 | 5262 | &md_consistency_policy.attr, |
9a567843 | 5263 | &md_fail_last_dev.attr, |
411036fa N |
5264 | NULL, |
5265 | }; | |
5266 | ||
5267 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5268 | &md_scan_mode.attr, |
c4a39551 | 5269 | &md_last_scan_mode.attr, |
9d88883e | 5270 | &md_mismatches.attr, |
88202a0c N |
5271 | &md_sync_min.attr, |
5272 | &md_sync_max.attr, | |
5273 | &md_sync_speed.attr, | |
90b08710 | 5274 | &md_sync_force_parallel.attr, |
88202a0c | 5275 | &md_sync_completed.attr, |
5e96ee65 | 5276 | &md_min_sync.attr, |
c6207277 | 5277 | &md_max_sync.attr, |
e464eafd N |
5278 | &md_suspend_lo.attr, |
5279 | &md_suspend_hi.attr, | |
9b1d1dac | 5280 | &md_bitmap.attr, |
d7f3d291 | 5281 | &md_degraded.attr, |
eae1701f N |
5282 | NULL, |
5283 | }; | |
411036fa N |
5284 | static struct attribute_group md_redundancy_group = { |
5285 | .name = NULL, | |
5286 | .attrs = md_redundancy_attrs, | |
5287 | }; | |
5288 | ||
eae1701f N |
5289 | static ssize_t |
5290 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5291 | { | |
5292 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5293 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5294 | ssize_t rv; |
eae1701f N |
5295 | |
5296 | if (!entry->show) | |
5297 | return -EIO; | |
af8a2434 N |
5298 | spin_lock(&all_mddevs_lock); |
5299 | if (list_empty(&mddev->all_mddevs)) { | |
5300 | spin_unlock(&all_mddevs_lock); | |
5301 | return -EBUSY; | |
5302 | } | |
5303 | mddev_get(mddev); | |
5304 | spin_unlock(&all_mddevs_lock); | |
5305 | ||
b7b17c9b | 5306 | rv = entry->show(mddev, page); |
af8a2434 | 5307 | mddev_put(mddev); |
96de1e66 | 5308 | return rv; |
eae1701f N |
5309 | } |
5310 | ||
5311 | static ssize_t | |
5312 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5313 | const char *page, size_t length) | |
5314 | { | |
5315 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5316 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5317 | ssize_t rv; |
eae1701f N |
5318 | |
5319 | if (!entry->store) | |
5320 | return -EIO; | |
67463acb N |
5321 | if (!capable(CAP_SYS_ADMIN)) |
5322 | return -EACCES; | |
af8a2434 N |
5323 | spin_lock(&all_mddevs_lock); |
5324 | if (list_empty(&mddev->all_mddevs)) { | |
5325 | spin_unlock(&all_mddevs_lock); | |
5326 | return -EBUSY; | |
5327 | } | |
5328 | mddev_get(mddev); | |
5329 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5330 | rv = entry->store(mddev, page, length); |
af8a2434 | 5331 | mddev_put(mddev); |
96de1e66 | 5332 | return rv; |
eae1701f N |
5333 | } |
5334 | ||
5335 | static void md_free(struct kobject *ko) | |
5336 | { | |
fd01b88c | 5337 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5338 | |
5339 | if (mddev->sysfs_state) | |
5340 | sysfs_put(mddev->sysfs_state); | |
5341 | ||
d8115c35 BVA |
5342 | if (mddev->gendisk) |
5343 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5344 | if (mddev->queue) |
5345 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5346 | if (mddev->gendisk) |
a21d1504 | 5347 | put_disk(mddev->gendisk); |
4ad23a97 | 5348 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5349 | |
28dec870 KO |
5350 | bioset_exit(&mddev->bio_set); |
5351 | bioset_exit(&mddev->sync_set); | |
eae1701f N |
5352 | kfree(mddev); |
5353 | } | |
5354 | ||
52cf25d0 | 5355 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5356 | .show = md_attr_show, |
5357 | .store = md_attr_store, | |
5358 | }; | |
5359 | static struct kobj_type md_ktype = { | |
5360 | .release = md_free, | |
5361 | .sysfs_ops = &md_sysfs_ops, | |
5362 | .default_attrs = md_default_attrs, | |
5363 | }; | |
5364 | ||
1da177e4 LT |
5365 | int mdp_major = 0; |
5366 | ||
5fd3a17e DW |
5367 | static void mddev_delayed_delete(struct work_struct *ws) |
5368 | { | |
fd01b88c | 5369 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5370 | |
43a70507 | 5371 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5372 | kobject_del(&mddev->kobj); |
5373 | kobject_put(&mddev->kobj); | |
5374 | } | |
5375 | ||
4ad23a97 N |
5376 | static void no_op(struct percpu_ref *r) {} |
5377 | ||
a415c0f1 N |
5378 | int mddev_init_writes_pending(struct mddev *mddev) |
5379 | { | |
5380 | if (mddev->writes_pending.percpu_count_ptr) | |
5381 | return 0; | |
ddde2af7 RG |
5382 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5383 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5384 | return -ENOMEM; |
5385 | /* We want to start with the refcount at zero */ | |
5386 | percpu_ref_put(&mddev->writes_pending); | |
5387 | return 0; | |
5388 | } | |
5389 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5390 | ||
efeb53c0 | 5391 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5392 | { |
039b7225 N |
5393 | /* |
5394 | * If dev is zero, name is the name of a device to allocate with | |
5395 | * an arbitrary minor number. It will be "md_???" | |
5396 | * If dev is non-zero it must be a device number with a MAJOR of | |
5397 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5398 | * the device is being created by opening a node in /dev. | |
5399 | * If "name" is not NULL, the device is being created by | |
5400 | * writing to /sys/module/md_mod/parameters/new_array. | |
5401 | */ | |
48c9c27b | 5402 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5403 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5404 | struct gendisk *disk; |
efeb53c0 N |
5405 | int partitioned; |
5406 | int shift; | |
5407 | int unit; | |
3830c62f | 5408 | int error; |
1da177e4 LT |
5409 | |
5410 | if (!mddev) | |
efeb53c0 N |
5411 | return -ENODEV; |
5412 | ||
5413 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5414 | shift = partitioned ? MdpMinorShift : 0; | |
5415 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5416 | |
e804ac78 TH |
5417 | /* wait for any previous instance of this device to be |
5418 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5419 | */ |
e804ac78 | 5420 | flush_workqueue(md_misc_wq); |
d3374825 | 5421 | |
48c9c27b | 5422 | mutex_lock(&disks_mutex); |
0909dc44 N |
5423 | error = -EEXIST; |
5424 | if (mddev->gendisk) | |
5425 | goto abort; | |
efeb53c0 | 5426 | |
039b7225 | 5427 | if (name && !dev) { |
efeb53c0 N |
5428 | /* Need to ensure that 'name' is not a duplicate. |
5429 | */ | |
fd01b88c | 5430 | struct mddev *mddev2; |
efeb53c0 N |
5431 | spin_lock(&all_mddevs_lock); |
5432 | ||
5433 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5434 | if (mddev2->gendisk && | |
5435 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5436 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5437 | goto abort; |
efeb53c0 N |
5438 | } |
5439 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5440 | } |
039b7225 N |
5441 | if (name && dev) |
5442 | /* | |
5443 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5444 | */ | |
5445 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5446 | |
0909dc44 | 5447 | error = -ENOMEM; |
8b765398 | 5448 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5449 | if (!mddev->queue) |
5450 | goto abort; | |
409c57f3 N |
5451 | mddev->queue->queuedata = mddev; |
5452 | ||
409c57f3 | 5453 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5454 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5455 | |
1da177e4 LT |
5456 | disk = alloc_disk(1 << shift); |
5457 | if (!disk) { | |
8b765398 N |
5458 | blk_cleanup_queue(mddev->queue); |
5459 | mddev->queue = NULL; | |
0909dc44 | 5460 | goto abort; |
1da177e4 | 5461 | } |
efeb53c0 | 5462 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5463 | disk->first_minor = unit << shift; |
efeb53c0 N |
5464 | if (name) |
5465 | strcpy(disk->disk_name, name); | |
5466 | else if (partitioned) | |
1da177e4 | 5467 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5468 | else |
1da177e4 | 5469 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5470 | disk->fops = &md_fops; |
5471 | disk->private_data = mddev; | |
5472 | disk->queue = mddev->queue; | |
56883a7e | 5473 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5474 | /* Allow extended partitions. This makes the |
d3374825 | 5475 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5476 | * remove it now. |
5477 | */ | |
5478 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5479 | mddev->gendisk = disk; |
b0140891 N |
5480 | /* As soon as we call add_disk(), another thread could get |
5481 | * through to md_open, so make sure it doesn't get too far | |
5482 | */ | |
5483 | mutex_lock(&mddev->open_mutex); | |
5484 | add_disk(disk); | |
5485 | ||
28dec870 | 5486 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5487 | if (error) { |
5488 | /* This isn't possible, but as kobject_init_and_add is marked | |
5489 | * __must_check, we must do something with the result | |
5490 | */ | |
9d48739e N |
5491 | pr_debug("md: cannot register %s/md - name in use\n", |
5492 | disk->disk_name); | |
0909dc44 N |
5493 | error = 0; |
5494 | } | |
00bcb4ac N |
5495 | if (mddev->kobj.sd && |
5496 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5497 | pr_debug("pointless warning\n"); |
b0140891 | 5498 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5499 | abort: |
5500 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5501 | if (!error && mddev->kobj.sd) { |
3830c62f | 5502 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5503 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5504 | } |
d3374825 | 5505 | mddev_put(mddev); |
0909dc44 | 5506 | return error; |
efeb53c0 N |
5507 | } |
5508 | ||
5509 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5510 | { | |
78b6350d N |
5511 | if (create_on_open) |
5512 | md_alloc(dev, NULL); | |
1da177e4 LT |
5513 | return NULL; |
5514 | } | |
5515 | ||
e4dca7b7 | 5516 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5517 | { |
039b7225 N |
5518 | /* |
5519 | * val must be "md_*" or "mdNNN". | |
5520 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5521 | * set the name to val. val must not already be an active name. |
039b7225 N |
5522 | * For "mdNNN" we allocate an array with the minor number NNN |
5523 | * which must not already be in use. | |
efeb53c0 N |
5524 | */ |
5525 | int len = strlen(val); | |
5526 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5527 | unsigned long devnum; |
efeb53c0 N |
5528 | |
5529 | while (len && val[len-1] == '\n') | |
5530 | len--; | |
5531 | if (len >= DISK_NAME_LEN) | |
5532 | return -E2BIG; | |
5533 | strlcpy(buf, val, len+1); | |
039b7225 N |
5534 | if (strncmp(buf, "md_", 3) == 0) |
5535 | return md_alloc(0, buf); | |
5536 | if (strncmp(buf, "md", 2) == 0 && | |
5537 | isdigit(buf[2]) && | |
5538 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5539 | devnum <= MINORMASK) | |
5540 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5541 | ||
5542 | return -EINVAL; | |
efeb53c0 N |
5543 | } |
5544 | ||
8376d3c1 | 5545 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5546 | { |
8376d3c1 | 5547 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5548 | |
4ad23a97 N |
5549 | mddev->safemode = 1; |
5550 | if (mddev->external) | |
5551 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5552 | ||
1da177e4 LT |
5553 | md_wakeup_thread(mddev->thread); |
5554 | } | |
5555 | ||
6ff8d8ec | 5556 | static int start_dirty_degraded; |
1da177e4 | 5557 | |
fd01b88c | 5558 | int md_run(struct mddev *mddev) |
1da177e4 | 5559 | { |
2604b703 | 5560 | int err; |
3cb03002 | 5561 | struct md_rdev *rdev; |
84fc4b56 | 5562 | struct md_personality *pers; |
1da177e4 | 5563 | |
a757e64c N |
5564 | if (list_empty(&mddev->disks)) |
5565 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5566 | return -EINVAL; |
1da177e4 LT |
5567 | |
5568 | if (mddev->pers) | |
5569 | return -EBUSY; | |
bb4f1e9d N |
5570 | /* Cannot run until previous stop completes properly */ |
5571 | if (mddev->sysfs_active) | |
5572 | return -EBUSY; | |
b6eb127d | 5573 | |
1da177e4 LT |
5574 | /* |
5575 | * Analyze all RAID superblock(s) | |
5576 | */ | |
1ec4a939 N |
5577 | if (!mddev->raid_disks) { |
5578 | if (!mddev->persistent) | |
5579 | return -EINVAL; | |
a757e64c | 5580 | analyze_sbs(mddev); |
1ec4a939 | 5581 | } |
1da177e4 | 5582 | |
d9d166c2 N |
5583 | if (mddev->level != LEVEL_NONE) |
5584 | request_module("md-level-%d", mddev->level); | |
5585 | else if (mddev->clevel[0]) | |
5586 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5587 | |
5588 | /* | |
5589 | * Drop all container device buffers, from now on | |
5590 | * the only valid external interface is through the md | |
5591 | * device. | |
1da177e4 | 5592 | */ |
4b6c1060 | 5593 | mddev->has_superblocks = false; |
dafb20fa | 5594 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5595 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5596 | continue; |
5597 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5598 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5599 | if (mddev->ro != 1 && |
5600 | (bdev_read_only(rdev->bdev) || | |
5601 | bdev_read_only(rdev->meta_bdev))) { | |
5602 | mddev->ro = 1; | |
5603 | if (mddev->gendisk) | |
5604 | set_disk_ro(mddev->gendisk, 1); | |
5605 | } | |
f0d76d70 | 5606 | |
4b6c1060 HM |
5607 | if (rdev->sb_page) |
5608 | mddev->has_superblocks = true; | |
5609 | ||
f0d76d70 N |
5610 | /* perform some consistency tests on the device. |
5611 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5612 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5613 | */ |
a6ff7e08 JB |
5614 | if (rdev->meta_bdev) { |
5615 | /* Nothing to check */; | |
5616 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5617 | if (mddev->dev_sectors && |
5618 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5619 | > rdev->sb_start) { |
9d48739e N |
5620 | pr_warn("md: %s: data overlaps metadata\n", |
5621 | mdname(mddev)); | |
f0d76d70 N |
5622 | return -EINVAL; |
5623 | } | |
5624 | } else { | |
0f420358 | 5625 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5626 | > rdev->data_offset) { |
9d48739e N |
5627 | pr_warn("md: %s: metadata overlaps data\n", |
5628 | mdname(mddev)); | |
f0d76d70 N |
5629 | return -EINVAL; |
5630 | } | |
5631 | } | |
00bcb4ac | 5632 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5633 | } |
5634 | ||
afeee514 KO |
5635 | if (!bioset_initialized(&mddev->bio_set)) { |
5636 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5637 | if (err) | |
5638 | return err; | |
10273170 | 5639 | } |
afeee514 KO |
5640 | if (!bioset_initialized(&mddev->sync_set)) { |
5641 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5642 | if (err) | |
28dec870 | 5643 | return err; |
5a85071c | 5644 | } |
a167f663 | 5645 | |
1da177e4 | 5646 | spin_lock(&pers_lock); |
d9d166c2 | 5647 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5648 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5649 | spin_unlock(&pers_lock); |
d9d166c2 | 5650 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5651 | pr_warn("md: personality for level %d is not loaded!\n", |
5652 | mddev->level); | |
d9d166c2 | 5653 | else |
9d48739e N |
5654 | pr_warn("md: personality for level %s is not loaded!\n", |
5655 | mddev->clevel); | |
bfc9dfdc SL |
5656 | err = -EINVAL; |
5657 | goto abort; | |
1da177e4 | 5658 | } |
1da177e4 | 5659 | spin_unlock(&pers_lock); |
34817e8c N |
5660 | if (mddev->level != pers->level) { |
5661 | mddev->level = pers->level; | |
5662 | mddev->new_level = pers->level; | |
5663 | } | |
d9d166c2 | 5664 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5665 | |
f6705578 | 5666 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5667 | pers->start_reshape == NULL) { |
f6705578 | 5668 | /* This personality cannot handle reshaping... */ |
f6705578 | 5669 | module_put(pers->owner); |
bfc9dfdc SL |
5670 | err = -EINVAL; |
5671 | goto abort; | |
f6705578 N |
5672 | } |
5673 | ||
7dd5e7c3 N |
5674 | if (pers->sync_request) { |
5675 | /* Warn if this is a potentially silly | |
5676 | * configuration. | |
5677 | */ | |
5678 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5679 | struct md_rdev *rdev2; |
7dd5e7c3 | 5680 | int warned = 0; |
159ec1fc | 5681 | |
dafb20fa N |
5682 | rdev_for_each(rdev, mddev) |
5683 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5684 | if (rdev < rdev2 && |
5685 | rdev->bdev->bd_contains == | |
5686 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5687 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5688 | mdname(mddev), | |
5689 | bdevname(rdev->bdev,b), | |
5690 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5691 | warned = 1; |
5692 | } | |
5693 | } | |
159ec1fc | 5694 | |
7dd5e7c3 | 5695 | if (warned) |
9d48739e | 5696 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5697 | } |
5698 | ||
657390d2 | 5699 | mddev->recovery = 0; |
58c0fed4 AN |
5700 | /* may be over-ridden by personality */ |
5701 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5702 | ||
6ff8d8ec | 5703 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5704 | |
0f9552b5 | 5705 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5706 | mddev->ro = 2; /* read-only, but switch on first write */ |
5707 | ||
36d091f4 | 5708 | err = pers->run(mddev); |
13e53df3 | 5709 | if (err) |
9d48739e | 5710 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5711 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5712 | WARN_ONCE(!mddev->external_size, |
5713 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5714 | __func__); | |
5715 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5716 | (unsigned long long)mddev->array_sectors / 2, | |
5717 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5718 | err = -EINVAL; |
b522adcd | 5719 | } |
36d091f4 | 5720 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5721 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5722 | struct bitmap *bitmap; |
5723 | ||
e64e4018 | 5724 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5725 | if (IS_ERR(bitmap)) { |
5726 | err = PTR_ERR(bitmap); | |
9d48739e N |
5727 | pr_warn("%s: failed to create bitmap (%d)\n", |
5728 | mdname(mddev), err); | |
f9209a32 GR |
5729 | } else |
5730 | mddev->bitmap = bitmap; | |
5731 | ||
b15c2e57 | 5732 | } |
d494549a GJ |
5733 | if (err) |
5734 | goto bitmap_abort; | |
3e148a32 GJ |
5735 | |
5736 | if (mddev->bitmap_info.max_write_behind > 0) { | |
5737 | bool creat_pool = false; | |
5738 | ||
5739 | rdev_for_each(rdev, mddev) { | |
5740 | if (test_bit(WriteMostly, &rdev->flags) && | |
5741 | rdev_init_wb(rdev)) | |
5742 | creat_pool = true; | |
5743 | } | |
5744 | if (creat_pool && mddev->wb_info_pool == NULL) { | |
5745 | mddev->wb_info_pool = | |
5746 | mempool_create_kmalloc_pool(NR_WB_INFOS, | |
5747 | sizeof(struct wb_info)); | |
5748 | if (!mddev->wb_info_pool) { | |
5749 | err = -ENOMEM; | |
d494549a | 5750 | goto bitmap_abort; |
3e148a32 GJ |
5751 | } |
5752 | } | |
5753 | } | |
5754 | ||
5c675f83 | 5755 | if (mddev->queue) { |
bb086a89 SL |
5756 | bool nonrot = true; |
5757 | ||
5758 | rdev_for_each(rdev, mddev) { | |
5759 | if (rdev->raid_disk >= 0 && | |
5760 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5761 | nonrot = false; | |
5762 | break; | |
5763 | } | |
5764 | } | |
5765 | if (mddev->degraded) | |
5766 | nonrot = false; | |
5767 | if (nonrot) | |
8b904b5b | 5768 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5769 | else |
8b904b5b | 5770 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
dc3b17cc JK |
5771 | mddev->queue->backing_dev_info->congested_data = mddev; |
5772 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5773 | } |
36d091f4 | 5774 | if (pers->sync_request) { |
00bcb4ac N |
5775 | if (mddev->kobj.sd && |
5776 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5777 | pr_warn("md: cannot register extra attributes for %s\n", |
5778 | mdname(mddev)); | |
00bcb4ac | 5779 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5780 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5781 | mddev->ro = 0; |
5782 | ||
1e50915f RB |
5783 | atomic_set(&mddev->max_corr_read_errors, |
5784 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5785 | mddev->safemode = 0; |
28c1b9fd GR |
5786 | if (mddev_is_clustered(mddev)) |
5787 | mddev->safemode_delay = 0; | |
5788 | else | |
5789 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5790 | mddev->in_sync = 1; |
0ca69886 | 5791 | smp_wmb(); |
36d091f4 N |
5792 | spin_lock(&mddev->lock); |
5793 | mddev->pers = pers; | |
36d091f4 | 5794 | spin_unlock(&mddev->lock); |
dafb20fa | 5795 | rdev_for_each(rdev, mddev) |
36fad858 | 5796 | if (rdev->raid_disk >= 0) |
e5b521ee | 5797 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 5798 | |
a4a3d26d N |
5799 | if (mddev->degraded && !mddev->ro) |
5800 | /* This ensures that recovering status is reported immediately | |
5801 | * via sysfs - until a lack of spares is confirmed. | |
5802 | */ | |
5803 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5804 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5805 | |
2953079c | 5806 | if (mddev->sb_flags) |
850b2b42 | 5807 | md_update_sb(mddev, 0); |
1da177e4 | 5808 | |
d7603b7e | 5809 | md_new_event(mddev); |
1da177e4 | 5810 | return 0; |
b126194c | 5811 | |
d494549a GJ |
5812 | bitmap_abort: |
5813 | mddev_detach(mddev); | |
5814 | if (mddev->private) | |
5815 | pers->free(mddev, mddev->private); | |
5816 | mddev->private = NULL; | |
5817 | module_put(pers->owner); | |
5818 | md_bitmap_destroy(mddev); | |
b126194c | 5819 | abort: |
4bc034d3 N |
5820 | bioset_exit(&mddev->bio_set); |
5821 | bioset_exit(&mddev->sync_set); | |
b126194c | 5822 | return err; |
1da177e4 | 5823 | } |
390ee602 | 5824 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5825 | |
fd01b88c | 5826 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5827 | { |
5828 | int err; | |
5829 | ||
9d4b45d6 | 5830 | set_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
5831 | err = md_run(mddev); |
5832 | if (err) | |
5833 | goto out; | |
e64e4018 | 5834 | err = md_bitmap_load(mddev); |
69e51b44 | 5835 | if (err) { |
e64e4018 | 5836 | md_bitmap_destroy(mddev); |
69e51b44 N |
5837 | goto out; |
5838 | } | |
0fd018af | 5839 | |
28c1b9fd GR |
5840 | if (mddev_is_clustered(mddev)) |
5841 | md_allow_write(mddev); | |
5842 | ||
d5d885fd SL |
5843 | /* run start up tasks that require md_thread */ |
5844 | md_start(mddev); | |
5845 | ||
0fd018af JB |
5846 | md_wakeup_thread(mddev->thread); |
5847 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5848 | ||
fe60b014 N |
5849 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5850 | revalidate_disk(mddev->gendisk); | |
9d4b45d6 | 5851 | clear_bit(MD_NOT_READY, &mddev->flags); |
f0b4f7e2 | 5852 | mddev->changed = 1; |
fe60b014 | 5853 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
9d4b45d6 N |
5854 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5855 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
5856 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
fe60b014 | 5857 | out: |
9d4b45d6 | 5858 | clear_bit(MD_NOT_READY, &mddev->flags); |
fe60b014 N |
5859 | return err; |
5860 | } | |
5861 | ||
d5d885fd SL |
5862 | int md_start(struct mddev *mddev) |
5863 | { | |
5864 | int ret = 0; | |
5865 | ||
5866 | if (mddev->pers->start) { | |
5867 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5868 | md_wakeup_thread(mddev->thread); | |
5869 | ret = mddev->pers->start(mddev); | |
5870 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5871 | md_wakeup_thread(mddev->sync_thread); | |
5872 | } | |
5873 | return ret; | |
5874 | } | |
5875 | EXPORT_SYMBOL_GPL(md_start); | |
5876 | ||
fd01b88c | 5877 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5878 | { |
5879 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
5880 | struct md_rdev *rdev; |
5881 | bool has_journal = false; | |
5882 | bool has_readonly = false; | |
1da177e4 | 5883 | |
80fab1d7 | 5884 | /* Complain if it has no devices */ |
1da177e4 | 5885 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5886 | return -ENXIO; |
5887 | if (!mddev->pers) | |
5888 | return -EINVAL; | |
5889 | if (!mddev->ro) | |
5890 | return -EBUSY; | |
339421de | 5891 | |
97b20ef7 N |
5892 | rcu_read_lock(); |
5893 | rdev_for_each_rcu(rdev, mddev) { | |
5894 | if (test_bit(Journal, &rdev->flags) && | |
5895 | !test_bit(Faulty, &rdev->flags)) | |
5896 | has_journal = true; | |
5897 | if (bdev_read_only(rdev->bdev)) | |
5898 | has_readonly = true; | |
5899 | } | |
5900 | rcu_read_unlock(); | |
5901 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 5902 | /* Don't restart rw with journal missing/faulty */ |
339421de | 5903 | return -EINVAL; |
97b20ef7 N |
5904 | if (has_readonly) |
5905 | return -EROFS; | |
339421de | 5906 | |
80fab1d7 AN |
5907 | mddev->safemode = 0; |
5908 | mddev->ro = 0; | |
5909 | set_disk_ro(disk, 0); | |
9d48739e | 5910 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5911 | /* Kick recovery or resync if necessary */ |
5912 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5913 | md_wakeup_thread(mddev->thread); | |
5914 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5915 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5916 | return 0; |
1da177e4 LT |
5917 | } |
5918 | ||
fd01b88c | 5919 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5920 | { |
5921 | mddev->array_sectors = 0; | |
5922 | mddev->external_size = 0; | |
5923 | mddev->dev_sectors = 0; | |
5924 | mddev->raid_disks = 0; | |
5925 | mddev->recovery_cp = 0; | |
5926 | mddev->resync_min = 0; | |
5927 | mddev->resync_max = MaxSector; | |
5928 | mddev->reshape_position = MaxSector; | |
5929 | mddev->external = 0; | |
5930 | mddev->persistent = 0; | |
5931 | mddev->level = LEVEL_NONE; | |
5932 | mddev->clevel[0] = 0; | |
5933 | mddev->flags = 0; | |
2953079c | 5934 | mddev->sb_flags = 0; |
6177b472 N |
5935 | mddev->ro = 0; |
5936 | mddev->metadata_type[0] = 0; | |
5937 | mddev->chunk_sectors = 0; | |
5938 | mddev->ctime = mddev->utime = 0; | |
5939 | mddev->layout = 0; | |
5940 | mddev->max_disks = 0; | |
5941 | mddev->events = 0; | |
a8707c08 | 5942 | mddev->can_decrease_events = 0; |
6177b472 | 5943 | mddev->delta_disks = 0; |
2c810cdd | 5944 | mddev->reshape_backwards = 0; |
6177b472 N |
5945 | mddev->new_level = LEVEL_NONE; |
5946 | mddev->new_layout = 0; | |
5947 | mddev->new_chunk_sectors = 0; | |
5948 | mddev->curr_resync = 0; | |
7f7583d4 | 5949 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5950 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5951 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5952 | mddev->recovery = 0; | |
5953 | mddev->in_sync = 0; | |
f0b4f7e2 | 5954 | mddev->changed = 0; |
6177b472 | 5955 | mddev->degraded = 0; |
6177b472 | 5956 | mddev->safemode = 0; |
bd691922 | 5957 | mddev->private = NULL; |
c20c33f0 | 5958 | mddev->cluster_info = NULL; |
6177b472 N |
5959 | mddev->bitmap_info.offset = 0; |
5960 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5961 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5962 | mddev->bitmap_info.chunksize = 0; |
5963 | mddev->bitmap_info.daemon_sleep = 0; | |
5964 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 5965 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
5966 | } |
5967 | ||
fd01b88c | 5968 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5969 | { |
6b6204ee | 5970 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5971 | flush_workqueue(md_misc_wq); |
a047e125 | 5972 | if (mddev->sync_thread) { |
a047e125 | 5973 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5974 | md_reap_sync_thread(mddev); |
a047e125 N |
5975 | } |
5976 | ||
5977 | del_timer_sync(&mddev->safemode_timer); | |
5978 | ||
034e33f5 SL |
5979 | if (mddev->pers && mddev->pers->quiesce) { |
5980 | mddev->pers->quiesce(mddev, 1); | |
5981 | mddev->pers->quiesce(mddev, 0); | |
5982 | } | |
e64e4018 | 5983 | md_bitmap_flush(mddev); |
a047e125 | 5984 | |
b6d428c6 | 5985 | if (mddev->ro == 0 && |
28c1b9fd | 5986 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 5987 | mddev->sb_flags)) { |
a047e125 | 5988 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5989 | if (!mddev_is_clustered(mddev)) |
5990 | mddev->in_sync = 1; | |
a047e125 N |
5991 | md_update_sb(mddev, 1); |
5992 | } | |
3e148a32 GJ |
5993 | mempool_destroy(mddev->wb_info_pool); |
5994 | mddev->wb_info_pool = NULL; | |
a047e125 | 5995 | } |
defad61a | 5996 | |
fd01b88c | 5997 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5998 | { |
29f097c4 | 5999 | mddev_lock_nointr(mddev); |
defad61a N |
6000 | __md_stop_writes(mddev); |
6001 | mddev_unlock(mddev); | |
6002 | } | |
390ee602 | 6003 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 6004 | |
5aa61f42 N |
6005 | static void mddev_detach(struct mddev *mddev) |
6006 | { | |
e64e4018 | 6007 | md_bitmap_wait_behind_writes(mddev); |
36d091f4 | 6008 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
6009 | mddev->pers->quiesce(mddev, 1); |
6010 | mddev->pers->quiesce(mddev, 0); | |
6011 | } | |
6012 | md_unregister_thread(&mddev->thread); | |
6013 | if (mddev->queue) | |
6014 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
6015 | } | |
6016 | ||
5eff3c43 | 6017 | static void __md_stop(struct mddev *mddev) |
6177b472 | 6018 | { |
36d091f4 | 6019 | struct md_personality *pers = mddev->pers; |
e64e4018 | 6020 | md_bitmap_destroy(mddev); |
5aa61f42 | 6021 | mddev_detach(mddev); |
ee5d004f N |
6022 | /* Ensure ->event_work is done */ |
6023 | flush_workqueue(md_misc_wq); | |
36d091f4 | 6024 | spin_lock(&mddev->lock); |
6177b472 | 6025 | mddev->pers = NULL; |
36d091f4 N |
6026 | spin_unlock(&mddev->lock); |
6027 | pers->free(mddev, mddev->private); | |
bd691922 | 6028 | mddev->private = NULL; |
36d091f4 N |
6029 | if (pers->sync_request && mddev->to_remove == NULL) |
6030 | mddev->to_remove = &md_redundancy_group; | |
6031 | module_put(pers->owner); | |
cca9cf90 | 6032 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
6033 | } |
6034 | ||
6035 | void md_stop(struct mddev *mddev) | |
6036 | { | |
6037 | /* stop the array and free an attached data structures. | |
6038 | * This is called from dm-raid | |
6039 | */ | |
6040 | __md_stop(mddev); | |
afeee514 KO |
6041 | bioset_exit(&mddev->bio_set); |
6042 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6043 | } |
6044 | ||
390ee602 | 6045 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6046 | |
a05b7ea0 | 6047 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6048 | { |
6049 | int err = 0; | |
30b8feb7 N |
6050 | int did_freeze = 0; |
6051 | ||
6052 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6053 | did_freeze = 1; | |
6054 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6055 | md_wakeup_thread(mddev->thread); | |
6056 | } | |
f851b60d | 6057 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6058 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6059 | if (mddev->sync_thread) |
30b8feb7 N |
6060 | /* Thread might be blocked waiting for metadata update |
6061 | * which will now never happen */ | |
6062 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6063 | |
2953079c | 6064 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6065 | return -EBUSY; |
30b8feb7 | 6066 | mddev_unlock(mddev); |
f851b60d N |
6067 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6068 | &mddev->recovery)); | |
88724bfa | 6069 | wait_event(mddev->sb_wait, |
2953079c | 6070 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6071 | mddev_lock_nointr(mddev); |
6072 | ||
a4bd82d0 | 6073 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6074 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6075 | mddev->sync_thread || |
af8d8e6f | 6076 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6077 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6078 | if (did_freeze) { |
6079 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6080 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6081 | md_wakeup_thread(mddev->thread); |
6082 | } | |
a4bd82d0 N |
6083 | err = -EBUSY; |
6084 | goto out; | |
6085 | } | |
6086 | if (mddev->pers) { | |
defad61a | 6087 | __md_stop_writes(mddev); |
a4bd82d0 N |
6088 | |
6089 | err = -ENXIO; | |
6090 | if (mddev->ro==1) | |
6091 | goto out; | |
6092 | mddev->ro = 1; | |
6093 | set_disk_ro(mddev->gendisk, 1); | |
6094 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6095 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6096 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6097 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6098 | err = 0; |
a4bd82d0 N |
6099 | } |
6100 | out: | |
6101 | mutex_unlock(&mddev->open_mutex); | |
6102 | return err; | |
6103 | } | |
6104 | ||
9e653b63 N |
6105 | /* mode: |
6106 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6107 | * 2 - stop but do not disassemble array |
6108 | */ | |
f72ffdd6 | 6109 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6110 | struct block_device *bdev) |
1da177e4 | 6111 | { |
1da177e4 | 6112 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6113 | struct md_rdev *rdev; |
30b8feb7 N |
6114 | int did_freeze = 0; |
6115 | ||
6116 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6117 | did_freeze = 1; | |
6118 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6119 | md_wakeup_thread(mddev->thread); | |
6120 | } | |
f851b60d | 6121 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6122 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6123 | if (mddev->sync_thread) |
30b8feb7 N |
6124 | /* Thread might be blocked waiting for metadata update |
6125 | * which will now never happen */ | |
6126 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6127 | |
30b8feb7 | 6128 | mddev_unlock(mddev); |
f851b60d N |
6129 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6130 | !test_bit(MD_RECOVERY_RUNNING, | |
6131 | &mddev->recovery))); | |
30b8feb7 | 6132 | mddev_lock_nointr(mddev); |
1da177e4 | 6133 | |
c8c00a69 | 6134 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6135 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6136 | mddev->sysfs_active || |
6137 | mddev->sync_thread || | |
af8d8e6f | 6138 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6139 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6140 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6141 | if (did_freeze) { |
6142 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6143 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6144 | md_wakeup_thread(mddev->thread); |
6145 | } | |
260fa034 N |
6146 | return -EBUSY; |
6147 | } | |
6e17b027 | 6148 | if (mddev->pers) { |
a4bd82d0 N |
6149 | if (mddev->ro) |
6150 | set_disk_ro(disk, 0); | |
409c57f3 | 6151 | |
defad61a | 6152 | __md_stop_writes(mddev); |
5eff3c43 | 6153 | __md_stop(mddev); |
dc3b17cc | 6154 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 6155 | |
a4bd82d0 | 6156 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6157 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6158 | |
dafb20fa | 6159 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6160 | if (rdev->raid_disk >= 0) |
6161 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6162 | |
a4bd82d0 | 6163 | set_capacity(disk, 0); |
6e17b027 | 6164 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6165 | mddev->changed = 1; |
a4bd82d0 | 6166 | revalidate_disk(disk); |
0d4ca600 | 6167 | |
a4bd82d0 N |
6168 | if (mddev->ro) |
6169 | mddev->ro = 0; | |
6e17b027 N |
6170 | } else |
6171 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6172 | /* |
6173 | * Free resources if final stop | |
6174 | */ | |
9e653b63 | 6175 | if (mode == 0) { |
9d48739e | 6176 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6177 | |
c3d9714e | 6178 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6179 | struct file *f = mddev->bitmap_info.file; |
6180 | spin_lock(&mddev->lock); | |
c3d9714e | 6181 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6182 | spin_unlock(&mddev->lock); |
6183 | fput(f); | |
978f946b | 6184 | } |
c3d9714e | 6185 | mddev->bitmap_info.offset = 0; |
978f946b | 6186 | |
1da177e4 LT |
6187 | export_array(mddev); |
6188 | ||
6177b472 | 6189 | md_clean(mddev); |
efeb53c0 N |
6190 | if (mddev->hold_active == UNTIL_STOP) |
6191 | mddev->hold_active = 0; | |
a4bd82d0 | 6192 | } |
d7603b7e | 6193 | md_new_event(mddev); |
00bcb4ac | 6194 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6195 | return 0; |
1da177e4 LT |
6196 | } |
6197 | ||
fdee8ae4 | 6198 | #ifndef MODULE |
fd01b88c | 6199 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6200 | { |
3cb03002 | 6201 | struct md_rdev *rdev; |
1da177e4 LT |
6202 | int err; |
6203 | ||
a757e64c | 6204 | if (list_empty(&mddev->disks)) |
1da177e4 | 6205 | return; |
1da177e4 | 6206 | |
9d48739e | 6207 | pr_info("md: running: "); |
1da177e4 | 6208 | |
dafb20fa | 6209 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6210 | char b[BDEVNAME_SIZE]; |
9d48739e | 6211 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6212 | } |
9d48739e | 6213 | pr_cont("\n"); |
1da177e4 | 6214 | |
d710e138 | 6215 | err = do_md_run(mddev); |
1da177e4 | 6216 | if (err) { |
9d48739e | 6217 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6218 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6219 | } |
6220 | } | |
6221 | ||
6222 | /* | |
6223 | * lets try to run arrays based on all disks that have arrived | |
6224 | * until now. (those are in pending_raid_disks) | |
6225 | * | |
6226 | * the method: pick the first pending disk, collect all disks with | |
6227 | * the same UUID, remove all from the pending list and put them into | |
6228 | * the 'same_array' list. Then order this list based on superblock | |
6229 | * update time (freshest comes first), kick out 'old' disks and | |
6230 | * compare superblocks. If everything's fine then run it. | |
6231 | * | |
6232 | * If "unit" is allocated, then bump its reference count | |
6233 | */ | |
6234 | static void autorun_devices(int part) | |
6235 | { | |
3cb03002 | 6236 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6237 | struct mddev *mddev; |
1da177e4 LT |
6238 | char b[BDEVNAME_SIZE]; |
6239 | ||
9d48739e | 6240 | pr_info("md: autorun ...\n"); |
1da177e4 | 6241 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6242 | int unit; |
1da177e4 | 6243 | dev_t dev; |
ad01c9e3 | 6244 | LIST_HEAD(candidates); |
1da177e4 | 6245 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6246 | struct md_rdev, same_set); |
1da177e4 | 6247 | |
9d48739e | 6248 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6249 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6250 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6251 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6252 | pr_debug("md: adding %s ...\n", |
6253 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6254 | list_move(&rdev->same_set, &candidates); |
6255 | } | |
6256 | /* | |
6257 | * now we have a set of devices, with all of them having | |
6258 | * mostly sane superblocks. It's time to allocate the | |
6259 | * mddev. | |
6260 | */ | |
e8703fe1 N |
6261 | if (part) { |
6262 | dev = MKDEV(mdp_major, | |
6263 | rdev0->preferred_minor << MdpMinorShift); | |
6264 | unit = MINOR(dev) >> MdpMinorShift; | |
6265 | } else { | |
6266 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6267 | unit = MINOR(dev); | |
6268 | } | |
6269 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6270 | pr_warn("md: unit number in %s is bad: %d\n", |
6271 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6272 | break; |
6273 | } | |
1da177e4 LT |
6274 | |
6275 | md_probe(dev, NULL, NULL); | |
6276 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6277 | if (!mddev || !mddev->gendisk) { |
6278 | if (mddev) | |
6279 | mddev_put(mddev); | |
1da177e4 LT |
6280 | break; |
6281 | } | |
f72ffdd6 | 6282 | if (mddev_lock(mddev)) |
9d48739e | 6283 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6284 | else if (mddev->raid_disks || mddev->major_version |
6285 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6286 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6287 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6288 | mddev_unlock(mddev); | |
6289 | } else { | |
9d48739e | 6290 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6291 | mddev->persistent = 1; |
159ec1fc | 6292 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6293 | list_del_init(&rdev->same_set); |
6294 | if (bind_rdev_to_array(rdev, mddev)) | |
6295 | export_rdev(rdev); | |
6296 | } | |
6297 | autorun_array(mddev); | |
6298 | mddev_unlock(mddev); | |
6299 | } | |
6300 | /* on success, candidates will be empty, on error | |
6301 | * it won't... | |
6302 | */ | |
159ec1fc | 6303 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6304 | list_del_init(&rdev->same_set); |
1da177e4 | 6305 | export_rdev(rdev); |
4b80991c | 6306 | } |
1da177e4 LT |
6307 | mddev_put(mddev); |
6308 | } | |
9d48739e | 6309 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6310 | } |
fdee8ae4 | 6311 | #endif /* !MODULE */ |
1da177e4 | 6312 | |
f72ffdd6 | 6313 | static int get_version(void __user *arg) |
1da177e4 LT |
6314 | { |
6315 | mdu_version_t ver; | |
6316 | ||
6317 | ver.major = MD_MAJOR_VERSION; | |
6318 | ver.minor = MD_MINOR_VERSION; | |
6319 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6320 | ||
6321 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6322 | return -EFAULT; | |
6323 | ||
6324 | return 0; | |
6325 | } | |
6326 | ||
f72ffdd6 | 6327 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6328 | { |
6329 | mdu_array_info_t info; | |
a9f326eb | 6330 | int nr,working,insync,failed,spare; |
3cb03002 | 6331 | struct md_rdev *rdev; |
1da177e4 | 6332 | |
1ca69c4b N |
6333 | nr = working = insync = failed = spare = 0; |
6334 | rcu_read_lock(); | |
6335 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6336 | nr++; |
b2d444d7 | 6337 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6338 | failed++; |
6339 | else { | |
6340 | working++; | |
b2d444d7 | 6341 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6342 | insync++; |
b347af81 SL |
6343 | else if (test_bit(Journal, &rdev->flags)) |
6344 | /* TODO: add journal count to md_u.h */ | |
6345 | ; | |
1da177e4 LT |
6346 | else |
6347 | spare++; | |
6348 | } | |
6349 | } | |
1ca69c4b | 6350 | rcu_read_unlock(); |
1da177e4 LT |
6351 | |
6352 | info.major_version = mddev->major_version; | |
6353 | info.minor_version = mddev->minor_version; | |
6354 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6355 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6356 | info.level = mddev->level; |
58c0fed4 AN |
6357 | info.size = mddev->dev_sectors / 2; |
6358 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6359 | info.size = -1; |
1da177e4 LT |
6360 | info.nr_disks = nr; |
6361 | info.raid_disks = mddev->raid_disks; | |
6362 | info.md_minor = mddev->md_minor; | |
6363 | info.not_persistent= !mddev->persistent; | |
6364 | ||
9ebc6ef1 | 6365 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6366 | info.state = 0; |
6367 | if (mddev->in_sync) | |
6368 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6369 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6370 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6371 | if (mddev_is_clustered(mddev)) |
6372 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6373 | info.active_disks = insync; |
1da177e4 LT |
6374 | info.working_disks = working; |
6375 | info.failed_disks = failed; | |
6376 | info.spare_disks = spare; | |
6377 | ||
6378 | info.layout = mddev->layout; | |
9d8f0363 | 6379 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6380 | |
6381 | if (copy_to_user(arg, &info, sizeof(info))) | |
6382 | return -EFAULT; | |
6383 | ||
6384 | return 0; | |
6385 | } | |
6386 | ||
f72ffdd6 | 6387 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6388 | { |
6389 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6390 | char *ptr; |
4af1a041 | 6391 | int err; |
32a7627c | 6392 | |
b6878d9e | 6393 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6394 | if (!file) |
4af1a041 | 6395 | return -ENOMEM; |
32a7627c | 6396 | |
4af1a041 N |
6397 | err = 0; |
6398 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6399 | /* bitmap enabled */ |
6400 | if (mddev->bitmap_info.file) { | |
6401 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6402 | sizeof(file->pathname)); | |
6403 | if (IS_ERR(ptr)) | |
6404 | err = PTR_ERR(ptr); | |
6405 | else | |
6406 | memmove(file->pathname, ptr, | |
6407 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6408 | } | |
4af1a041 | 6409 | spin_unlock(&mddev->lock); |
32a7627c | 6410 | |
4af1a041 N |
6411 | if (err == 0 && |
6412 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6413 | err = -EFAULT; |
4af1a041 | 6414 | |
32a7627c N |
6415 | kfree(file); |
6416 | return err; | |
6417 | } | |
6418 | ||
f72ffdd6 | 6419 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6420 | { |
6421 | mdu_disk_info_t info; | |
3cb03002 | 6422 | struct md_rdev *rdev; |
1da177e4 LT |
6423 | |
6424 | if (copy_from_user(&info, arg, sizeof(info))) | |
6425 | return -EFAULT; | |
6426 | ||
1ca69c4b | 6427 | rcu_read_lock(); |
57d051dc | 6428 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6429 | if (rdev) { |
6430 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6431 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6432 | info.raid_disk = rdev->raid_disk; | |
6433 | info.state = 0; | |
b2d444d7 | 6434 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6435 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6436 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6437 | info.state |= (1<<MD_DISK_ACTIVE); |
6438 | info.state |= (1<<MD_DISK_SYNC); | |
6439 | } | |
9efdca16 | 6440 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6441 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6442 | if (test_bit(WriteMostly, &rdev->flags)) |
6443 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6444 | if (test_bit(FailFast, &rdev->flags)) |
6445 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6446 | } else { |
6447 | info.major = info.minor = 0; | |
6448 | info.raid_disk = -1; | |
6449 | info.state = (1<<MD_DISK_REMOVED); | |
6450 | } | |
1ca69c4b | 6451 | rcu_read_unlock(); |
1da177e4 LT |
6452 | |
6453 | if (copy_to_user(arg, &info, sizeof(info))) | |
6454 | return -EFAULT; | |
6455 | ||
6456 | return 0; | |
6457 | } | |
6458 | ||
f72ffdd6 | 6459 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6460 | { |
6461 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6462 | struct md_rdev *rdev; |
1da177e4 LT |
6463 | dev_t dev = MKDEV(info->major,info->minor); |
6464 | ||
1aee41f6 GR |
6465 | if (mddev_is_clustered(mddev) && |
6466 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6467 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6468 | mdname(mddev)); | |
1aee41f6 GR |
6469 | return -EINVAL; |
6470 | } | |
6471 | ||
1da177e4 LT |
6472 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6473 | return -EOVERFLOW; | |
6474 | ||
6475 | if (!mddev->raid_disks) { | |
6476 | int err; | |
6477 | /* expecting a device which has a superblock */ | |
6478 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6479 | if (IS_ERR(rdev)) { | |
9d48739e | 6480 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6481 | PTR_ERR(rdev)); |
6482 | return PTR_ERR(rdev); | |
6483 | } | |
6484 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6485 | struct md_rdev *rdev0 |
6486 | = list_entry(mddev->disks.next, | |
6487 | struct md_rdev, same_set); | |
a9f326eb | 6488 | err = super_types[mddev->major_version] |
1da177e4 LT |
6489 | .load_super(rdev, rdev0, mddev->minor_version); |
6490 | if (err < 0) { | |
9d48739e | 6491 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6492 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6493 | bdevname(rdev0->bdev,b2)); |
6494 | export_rdev(rdev); | |
6495 | return -EINVAL; | |
6496 | } | |
6497 | } | |
6498 | err = bind_rdev_to_array(rdev, mddev); | |
6499 | if (err) | |
6500 | export_rdev(rdev); | |
6501 | return err; | |
6502 | } | |
6503 | ||
6504 | /* | |
6505 | * add_new_disk can be used once the array is assembled | |
6506 | * to add "hot spares". They must already have a superblock | |
6507 | * written | |
6508 | */ | |
6509 | if (mddev->pers) { | |
6510 | int err; | |
6511 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6512 | pr_warn("%s: personality does not support diskops!\n", |
6513 | mdname(mddev)); | |
1da177e4 LT |
6514 | return -EINVAL; |
6515 | } | |
7b1e35f6 N |
6516 | if (mddev->persistent) |
6517 | rdev = md_import_device(dev, mddev->major_version, | |
6518 | mddev->minor_version); | |
6519 | else | |
6520 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6521 | if (IS_ERR(rdev)) { |
9d48739e | 6522 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6523 | PTR_ERR(rdev)); |
6524 | return PTR_ERR(rdev); | |
6525 | } | |
1a855a06 | 6526 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6527 | if (!mddev->persistent) { |
6528 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6529 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6530 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6531 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6532 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6533 | } else |
41158c7e | 6534 | rdev->raid_disk = -1; |
f466722c | 6535 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6536 | } else |
6537 | super_types[mddev->major_version]. | |
6538 | validate_super(mddev, rdev); | |
bedd86b7 | 6539 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6540 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6541 | /* This was a hot-add request, but events doesn't |
6542 | * match, so reject it. | |
6543 | */ | |
6544 | export_rdev(rdev); | |
6545 | return -EINVAL; | |
6546 | } | |
6547 | ||
b2d444d7 | 6548 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6549 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6550 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6551 | else |
6552 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6553 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6554 | set_bit(FailFast, &rdev->flags); | |
6555 | else | |
6556 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6557 | |
f6b6ec5c SL |
6558 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6559 | struct md_rdev *rdev2; | |
6560 | bool has_journal = false; | |
6561 | ||
6562 | /* make sure no existing journal disk */ | |
6563 | rdev_for_each(rdev2, mddev) { | |
6564 | if (test_bit(Journal, &rdev2->flags)) { | |
6565 | has_journal = true; | |
6566 | break; | |
6567 | } | |
6568 | } | |
230b55fa | 6569 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6570 | export_rdev(rdev); |
6571 | return -EBUSY; | |
6572 | } | |
bac624f3 | 6573 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6574 | } |
1aee41f6 GR |
6575 | /* |
6576 | * check whether the device shows up in other nodes | |
6577 | */ | |
6578 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6579 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6580 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6581 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6582 | /* --add initiated by this node */ |
dbb64f86 | 6583 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6584 | if (err) { |
1aee41f6 GR |
6585 | export_rdev(rdev); |
6586 | return err; | |
6587 | } | |
6588 | } | |
6589 | } | |
6590 | ||
1da177e4 LT |
6591 | rdev->raid_disk = -1; |
6592 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6593 | |
1da177e4 LT |
6594 | if (err) |
6595 | export_rdev(rdev); | |
dbb64f86 GR |
6596 | |
6597 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6598 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6599 | if (!err) { | |
6600 | err = md_cluster_ops->new_disk_ack(mddev, | |
6601 | err == 0); | |
6602 | if (err) | |
6603 | md_kick_rdev_from_array(rdev); | |
6604 | } | |
6605 | } else { | |
dbb64f86 GR |
6606 | if (err) |
6607 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6608 | else | |
6609 | err = add_bound_rdev(rdev); | |
6610 | } | |
6611 | ||
6612 | } else if (!err) | |
a6da4ef8 | 6613 | err = add_bound_rdev(rdev); |
dbb64f86 | 6614 | |
1da177e4 LT |
6615 | return err; |
6616 | } | |
6617 | ||
6618 | /* otherwise, add_new_disk is only allowed | |
6619 | * for major_version==0 superblocks | |
6620 | */ | |
6621 | if (mddev->major_version != 0) { | |
9d48739e | 6622 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6623 | return -EINVAL; |
6624 | } | |
6625 | ||
6626 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6627 | int err; | |
d710e138 | 6628 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6629 | if (IS_ERR(rdev)) { |
9d48739e | 6630 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6631 | PTR_ERR(rdev)); |
6632 | return PTR_ERR(rdev); | |
6633 | } | |
6634 | rdev->desc_nr = info->number; | |
6635 | if (info->raid_disk < mddev->raid_disks) | |
6636 | rdev->raid_disk = info->raid_disk; | |
6637 | else | |
6638 | rdev->raid_disk = -1; | |
6639 | ||
1da177e4 | 6640 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6641 | if (info->state & (1<<MD_DISK_SYNC)) |
6642 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6643 | |
8ddf9efe N |
6644 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6645 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6646 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6647 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6648 | |
1da177e4 | 6649 | if (!mddev->persistent) { |
9d48739e | 6650 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6651 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6652 | } else | |
57b2caa3 | 6653 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6654 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6655 | |
2bf071bf N |
6656 | err = bind_rdev_to_array(rdev, mddev); |
6657 | if (err) { | |
6658 | export_rdev(rdev); | |
6659 | return err; | |
6660 | } | |
1da177e4 LT |
6661 | } |
6662 | ||
6663 | return 0; | |
6664 | } | |
6665 | ||
f72ffdd6 | 6666 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6667 | { |
6668 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6669 | struct md_rdev *rdev; |
1da177e4 | 6670 | |
c42a0e26 YY |
6671 | if (!mddev->pers) |
6672 | return -ENODEV; | |
6673 | ||
1da177e4 LT |
6674 | rdev = find_rdev(mddev, dev); |
6675 | if (!rdev) | |
6676 | return -ENXIO; | |
6677 | ||
2910ff17 GR |
6678 | if (rdev->raid_disk < 0) |
6679 | goto kick_rdev; | |
293467aa | 6680 | |
3ea8929d N |
6681 | clear_bit(Blocked, &rdev->flags); |
6682 | remove_and_add_spares(mddev, rdev); | |
6683 | ||
1da177e4 LT |
6684 | if (rdev->raid_disk >= 0) |
6685 | goto busy; | |
6686 | ||
2910ff17 | 6687 | kick_rdev: |
54a88392 | 6688 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6689 | md_cluster_ops->remove_disk(mddev, rdev); |
6690 | ||
fb56dfef | 6691 | md_kick_rdev_from_array(rdev); |
2953079c | 6692 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6693 | if (mddev->thread) |
6694 | md_wakeup_thread(mddev->thread); | |
6695 | else | |
6696 | md_update_sb(mddev, 1); | |
d7603b7e | 6697 | md_new_event(mddev); |
1da177e4 LT |
6698 | |
6699 | return 0; | |
6700 | busy: | |
9d48739e N |
6701 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6702 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6703 | return -EBUSY; |
6704 | } | |
6705 | ||
f72ffdd6 | 6706 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6707 | { |
6708 | char b[BDEVNAME_SIZE]; | |
6709 | int err; | |
3cb03002 | 6710 | struct md_rdev *rdev; |
1da177e4 LT |
6711 | |
6712 | if (!mddev->pers) | |
6713 | return -ENODEV; | |
6714 | ||
6715 | if (mddev->major_version != 0) { | |
9d48739e | 6716 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6717 | mdname(mddev)); |
6718 | return -EINVAL; | |
6719 | } | |
6720 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6721 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6722 | mdname(mddev)); |
6723 | return -EINVAL; | |
6724 | } | |
6725 | ||
d710e138 | 6726 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6727 | if (IS_ERR(rdev)) { |
9d48739e | 6728 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6729 | PTR_ERR(rdev)); |
6730 | return -EINVAL; | |
6731 | } | |
6732 | ||
6733 | if (mddev->persistent) | |
57b2caa3 | 6734 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6735 | else |
77304d2a | 6736 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6737 | |
8190e754 | 6738 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6739 | |
b2d444d7 | 6740 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6741 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6742 | bdevname(rdev->bdev,b), mdname(mddev)); |
6743 | err = -EINVAL; | |
6744 | goto abort_export; | |
6745 | } | |
293467aa | 6746 | |
b2d444d7 | 6747 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6748 | rdev->desc_nr = -1; |
5842730d | 6749 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6750 | err = bind_rdev_to_array(rdev, mddev); |
6751 | if (err) | |
2aa82191 | 6752 | goto abort_export; |
1da177e4 LT |
6753 | |
6754 | /* | |
6755 | * The rest should better be atomic, we can have disk failures | |
6756 | * noticed in interrupt contexts ... | |
6757 | */ | |
6758 | ||
1da177e4 LT |
6759 | rdev->raid_disk = -1; |
6760 | ||
2953079c | 6761 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6762 | if (!mddev->thread) |
6763 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6764 | /* |
6765 | * Kick recovery, maybe this spare has to be added to the | |
6766 | * array immediately. | |
6767 | */ | |
6768 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6769 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6770 | md_new_event(mddev); |
1da177e4 LT |
6771 | return 0; |
6772 | ||
1da177e4 LT |
6773 | abort_export: |
6774 | export_rdev(rdev); | |
6775 | return err; | |
6776 | } | |
6777 | ||
fd01b88c | 6778 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6779 | { |
035328c2 | 6780 | int err = 0; |
32a7627c | 6781 | |
36fa3063 | 6782 | if (mddev->pers) { |
d66b1b39 | 6783 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6784 | return -EBUSY; |
6785 | if (mddev->recovery || mddev->sync_thread) | |
6786 | return -EBUSY; | |
6787 | /* we should be able to change the bitmap.. */ | |
6788 | } | |
32a7627c | 6789 | |
36fa3063 | 6790 | if (fd >= 0) { |
035328c2 | 6791 | struct inode *inode; |
1e594bb2 N |
6792 | struct file *f; |
6793 | ||
6794 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6795 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6796 | f = fget(fd); |
32a7627c | 6797 | |
1e594bb2 | 6798 | if (f == NULL) { |
9d48739e N |
6799 | pr_warn("%s: error: failed to get bitmap file\n", |
6800 | mdname(mddev)); | |
36fa3063 N |
6801 | return -EBADF; |
6802 | } | |
6803 | ||
1e594bb2 | 6804 | inode = f->f_mapping->host; |
035328c2 | 6805 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6806 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6807 | mdname(mddev)); | |
035328c2 | 6808 | err = -EBADF; |
1e594bb2 | 6809 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6810 | pr_warn("%s: error: bitmap file must open for write\n", |
6811 | mdname(mddev)); | |
035328c2 N |
6812 | err = -EBADF; |
6813 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6814 | pr_warn("%s: error: bitmap file is already in use\n", |
6815 | mdname(mddev)); | |
035328c2 N |
6816 | err = -EBUSY; |
6817 | } | |
6818 | if (err) { | |
1e594bb2 | 6819 | fput(f); |
36fa3063 N |
6820 | return err; |
6821 | } | |
1e594bb2 | 6822 | mddev->bitmap_info.file = f; |
c3d9714e | 6823 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6824 | } else if (mddev->bitmap == NULL) |
6825 | return -ENOENT; /* cannot remove what isn't there */ | |
6826 | err = 0; | |
6827 | if (mddev->pers) { | |
69e51b44 | 6828 | if (fd >= 0) { |
f9209a32 GR |
6829 | struct bitmap *bitmap; |
6830 | ||
e64e4018 | 6831 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 6832 | mddev_suspend(mddev); |
f9209a32 GR |
6833 | if (!IS_ERR(bitmap)) { |
6834 | mddev->bitmap = bitmap; | |
e64e4018 | 6835 | err = md_bitmap_load(mddev); |
ba599aca N |
6836 | } else |
6837 | err = PTR_ERR(bitmap); | |
52a0d49d | 6838 | if (err) { |
e64e4018 | 6839 | md_bitmap_destroy(mddev); |
52a0d49d N |
6840 | fd = -1; |
6841 | } | |
9e1cc0a5 | 6842 | mddev_resume(mddev); |
52a0d49d | 6843 | } else if (fd < 0) { |
9e1cc0a5 | 6844 | mddev_suspend(mddev); |
e64e4018 | 6845 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 6846 | mddev_resume(mddev); |
d7375ab3 | 6847 | } |
d7375ab3 N |
6848 | } |
6849 | if (fd < 0) { | |
4af1a041 N |
6850 | struct file *f = mddev->bitmap_info.file; |
6851 | if (f) { | |
6852 | spin_lock(&mddev->lock); | |
6853 | mddev->bitmap_info.file = NULL; | |
6854 | spin_unlock(&mddev->lock); | |
6855 | fput(f); | |
6856 | } | |
36fa3063 N |
6857 | } |
6858 | ||
32a7627c N |
6859 | return err; |
6860 | } | |
6861 | ||
1da177e4 LT |
6862 | /* |
6863 | * set_array_info is used two different ways | |
6864 | * The original usage is when creating a new array. | |
6865 | * In this usage, raid_disks is > 0 and it together with | |
6866 | * level, size, not_persistent,layout,chunksize determine the | |
6867 | * shape of the array. | |
6868 | * This will always create an array with a type-0.90.0 superblock. | |
6869 | * The newer usage is when assembling an array. | |
6870 | * In this case raid_disks will be 0, and the major_version field is | |
6871 | * use to determine which style super-blocks are to be found on the devices. | |
6872 | * The minor and patch _version numbers are also kept incase the | |
6873 | * super_block handler wishes to interpret them. | |
6874 | */ | |
f72ffdd6 | 6875 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6876 | { |
6877 | ||
6878 | if (info->raid_disks == 0) { | |
6879 | /* just setting version number for superblock loading */ | |
6880 | if (info->major_version < 0 || | |
50511da3 | 6881 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6882 | super_types[info->major_version].name == NULL) { |
6883 | /* maybe try to auto-load a module? */ | |
9d48739e | 6884 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6885 | info->major_version); |
6886 | return -EINVAL; | |
6887 | } | |
6888 | mddev->major_version = info->major_version; | |
6889 | mddev->minor_version = info->minor_version; | |
6890 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6891 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6892 | /* ensure mddev_put doesn't delete this now that there |
6893 | * is some minimal configuration. | |
6894 | */ | |
9ebc6ef1 | 6895 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6896 | return 0; |
6897 | } | |
6898 | mddev->major_version = MD_MAJOR_VERSION; | |
6899 | mddev->minor_version = MD_MINOR_VERSION; | |
6900 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6901 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6902 | |
6903 | mddev->level = info->level; | |
17115e03 | 6904 | mddev->clevel[0] = 0; |
58c0fed4 | 6905 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6906 | mddev->raid_disks = info->raid_disks; |
6907 | /* don't set md_minor, it is determined by which /dev/md* was | |
6908 | * openned | |
6909 | */ | |
6910 | if (info->state & (1<<MD_SB_CLEAN)) | |
6911 | mddev->recovery_cp = MaxSector; | |
6912 | else | |
6913 | mddev->recovery_cp = 0; | |
6914 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6915 | mddev->external = 0; |
1da177e4 LT |
6916 | |
6917 | mddev->layout = info->layout; | |
33f2c35a N |
6918 | if (mddev->level == 0) |
6919 | /* Cannot trust RAID0 layout info here */ | |
6920 | mddev->layout = -1; | |
9d8f0363 | 6921 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 6922 | |
2953079c | 6923 | if (mddev->persistent) { |
1b3bae49 N |
6924 | mddev->max_disks = MD_SB_DISKS; |
6925 | mddev->flags = 0; | |
6926 | mddev->sb_flags = 0; | |
2953079c SL |
6927 | } |
6928 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6929 | |
c3d9714e | 6930 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6931 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6932 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6933 | |
f6705578 N |
6934 | mddev->reshape_position = MaxSector; |
6935 | ||
1da177e4 LT |
6936 | /* |
6937 | * Generate a 128 bit UUID | |
6938 | */ | |
6939 | get_random_bytes(mddev->uuid, 16); | |
6940 | ||
f6705578 | 6941 | mddev->new_level = mddev->level; |
664e7c41 | 6942 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6943 | mddev->new_layout = mddev->layout; |
6944 | mddev->delta_disks = 0; | |
2c810cdd | 6945 | mddev->reshape_backwards = 0; |
f6705578 | 6946 | |
1da177e4 LT |
6947 | return 0; |
6948 | } | |
6949 | ||
fd01b88c | 6950 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6951 | { |
efa4b77b | 6952 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
6953 | |
6954 | if (mddev->external_size) | |
6955 | return; | |
6956 | ||
1f403624 DW |
6957 | mddev->array_sectors = array_sectors; |
6958 | } | |
6959 | EXPORT_SYMBOL(md_set_array_sectors); | |
6960 | ||
fd01b88c | 6961 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6962 | { |
3cb03002 | 6963 | struct md_rdev *rdev; |
a35b0d69 | 6964 | int rv; |
d71f9f88 | 6965 | int fit = (num_sectors == 0); |
818da59f | 6966 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 6967 | |
a35b0d69 N |
6968 | if (mddev->pers->resize == NULL) |
6969 | return -EINVAL; | |
d71f9f88 AN |
6970 | /* The "num_sectors" is the number of sectors of each device that |
6971 | * is used. This can only make sense for arrays with redundancy. | |
6972 | * linear and raid0 always use whatever space is available. We can only | |
6973 | * consider changing this number if no resync or reconstruction is | |
6974 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6975 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6976 | * of each device. If num_sectors is zero, we find the largest size |
6977 | * that fits. | |
a35b0d69 | 6978 | */ |
f851b60d N |
6979 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6980 | mddev->sync_thread) | |
a35b0d69 | 6981 | return -EBUSY; |
bd8839e0 N |
6982 | if (mddev->ro) |
6983 | return -EROFS; | |
a4a6125a | 6984 | |
dafb20fa | 6985 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6986 | sector_t avail = rdev->sectors; |
01ab5662 | 6987 | |
d71f9f88 AN |
6988 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6989 | num_sectors = avail; | |
6990 | if (avail < num_sectors) | |
a35b0d69 N |
6991 | return -ENOSPC; |
6992 | } | |
d71f9f88 | 6993 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 6994 | if (!rv) { |
818da59f GJ |
6995 | if (mddev_is_clustered(mddev)) |
6996 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
6997 | else if (mddev->queue) { | |
c9483634 GJ |
6998 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6999 | revalidate_disk(mddev->gendisk); | |
7000 | } | |
7001 | } | |
a35b0d69 N |
7002 | return rv; |
7003 | } | |
7004 | ||
fd01b88c | 7005 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
7006 | { |
7007 | int rv; | |
c6563a8c | 7008 | struct md_rdev *rdev; |
da943b99 | 7009 | /* change the number of raid disks */ |
63c70c4f | 7010 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 7011 | return -EINVAL; |
bd8839e0 N |
7012 | if (mddev->ro) |
7013 | return -EROFS; | |
da943b99 | 7014 | if (raid_disks <= 0 || |
233fca36 | 7015 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 7016 | return -EINVAL; |
f851b60d N |
7017 | if (mddev->sync_thread || |
7018 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
7019 | mddev->reshape_position != MaxSector) | |
da943b99 | 7020 | return -EBUSY; |
c6563a8c N |
7021 | |
7022 | rdev_for_each(rdev, mddev) { | |
7023 | if (mddev->raid_disks < raid_disks && | |
7024 | rdev->data_offset < rdev->new_data_offset) | |
7025 | return -EINVAL; | |
7026 | if (mddev->raid_disks > raid_disks && | |
7027 | rdev->data_offset > rdev->new_data_offset) | |
7028 | return -EINVAL; | |
7029 | } | |
7030 | ||
63c70c4f | 7031 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
7032 | if (mddev->delta_disks < 0) |
7033 | mddev->reshape_backwards = 1; | |
7034 | else if (mddev->delta_disks > 0) | |
7035 | mddev->reshape_backwards = 0; | |
63c70c4f N |
7036 | |
7037 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 7038 | if (rv < 0) { |
de171cb9 | 7039 | mddev->delta_disks = 0; |
2c810cdd N |
7040 | mddev->reshape_backwards = 0; |
7041 | } | |
da943b99 N |
7042 | return rv; |
7043 | } | |
7044 | ||
1da177e4 LT |
7045 | /* |
7046 | * update_array_info is used to change the configuration of an | |
7047 | * on-line array. | |
7048 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7049 | * fields in the info are checked against the array. | |
7050 | * Any differences that cannot be handled will cause an error. | |
7051 | * Normally, only one change can be managed at a time. | |
7052 | */ | |
fd01b88c | 7053 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7054 | { |
7055 | int rv = 0; | |
7056 | int cnt = 0; | |
36fa3063 N |
7057 | int state = 0; |
7058 | ||
7059 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7060 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7061 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7062 | |
7063 | if (mddev->major_version != info->major_version || | |
7064 | mddev->minor_version != info->minor_version || | |
7065 | /* mddev->patch_version != info->patch_version || */ | |
7066 | mddev->ctime != info->ctime || | |
7067 | mddev->level != info->level || | |
7068 | /* mddev->layout != info->layout || */ | |
4e023612 | 7069 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7070 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7071 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7072 | ((state^info->state) & 0xfffffe00) | |
7073 | ) | |
1da177e4 LT |
7074 | return -EINVAL; |
7075 | /* Check there is only one change */ | |
58c0fed4 AN |
7076 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7077 | cnt++; | |
7078 | if (mddev->raid_disks != info->raid_disks) | |
7079 | cnt++; | |
7080 | if (mddev->layout != info->layout) | |
7081 | cnt++; | |
7082 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7083 | cnt++; | |
7084 | if (cnt == 0) | |
7085 | return 0; | |
7086 | if (cnt > 1) | |
7087 | return -EINVAL; | |
1da177e4 LT |
7088 | |
7089 | if (mddev->layout != info->layout) { | |
7090 | /* Change layout | |
7091 | * we don't need to do anything at the md level, the | |
7092 | * personality will take care of it all. | |
7093 | */ | |
50ac168a | 7094 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7095 | return -EINVAL; |
597a711b N |
7096 | else { |
7097 | mddev->new_layout = info->layout; | |
50ac168a | 7098 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7099 | if (rv) |
7100 | mddev->new_layout = mddev->layout; | |
7101 | return rv; | |
7102 | } | |
1da177e4 | 7103 | } |
58c0fed4 | 7104 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7105 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7106 | |
da943b99 N |
7107 | if (mddev->raid_disks != info->raid_disks) |
7108 | rv = update_raid_disks(mddev, info->raid_disks); | |
7109 | ||
36fa3063 | 7110 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7111 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7112 | rv = -EINVAL; | |
7113 | goto err; | |
7114 | } | |
7115 | if (mddev->recovery || mddev->sync_thread) { | |
7116 | rv = -EBUSY; | |
7117 | goto err; | |
7118 | } | |
36fa3063 | 7119 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7120 | struct bitmap *bitmap; |
36fa3063 | 7121 | /* add the bitmap */ |
293467aa GR |
7122 | if (mddev->bitmap) { |
7123 | rv = -EEXIST; | |
7124 | goto err; | |
7125 | } | |
7126 | if (mddev->bitmap_info.default_offset == 0) { | |
7127 | rv = -EINVAL; | |
7128 | goto err; | |
7129 | } | |
c3d9714e N |
7130 | mddev->bitmap_info.offset = |
7131 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7132 | mddev->bitmap_info.space = |
7133 | mddev->bitmap_info.default_space; | |
e64e4018 | 7134 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7135 | mddev_suspend(mddev); |
f9209a32 GR |
7136 | if (!IS_ERR(bitmap)) { |
7137 | mddev->bitmap = bitmap; | |
e64e4018 | 7138 | rv = md_bitmap_load(mddev); |
ba599aca N |
7139 | } else |
7140 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7141 | if (rv) |
e64e4018 | 7142 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7143 | mddev_resume(mddev); |
36fa3063 N |
7144 | } else { |
7145 | /* remove the bitmap */ | |
293467aa GR |
7146 | if (!mddev->bitmap) { |
7147 | rv = -ENOENT; | |
7148 | goto err; | |
7149 | } | |
7150 | if (mddev->bitmap->storage.file) { | |
7151 | rv = -EINVAL; | |
7152 | goto err; | |
7153 | } | |
f6a2dc64 GJ |
7154 | if (mddev->bitmap_info.nodes) { |
7155 | /* hold PW on all the bitmap lock */ | |
7156 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7157 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7158 | rv = -EPERM; |
7159 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7160 | goto err; | |
7161 | } | |
7162 | ||
7163 | mddev->bitmap_info.nodes = 0; | |
7164 | md_cluster_ops->leave(mddev); | |
7165 | } | |
9e1cc0a5 | 7166 | mddev_suspend(mddev); |
e64e4018 | 7167 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7168 | mddev_resume(mddev); |
c3d9714e | 7169 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7170 | } |
7171 | } | |
850b2b42 | 7172 | md_update_sb(mddev, 1); |
293467aa GR |
7173 | return rv; |
7174 | err: | |
1da177e4 LT |
7175 | return rv; |
7176 | } | |
7177 | ||
fd01b88c | 7178 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7179 | { |
3cb03002 | 7180 | struct md_rdev *rdev; |
1ca69c4b | 7181 | int err = 0; |
1da177e4 LT |
7182 | |
7183 | if (mddev->pers == NULL) | |
7184 | return -ENODEV; | |
7185 | ||
1ca69c4b | 7186 | rcu_read_lock(); |
1532d9e8 | 7187 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7188 | if (!rdev) |
1ca69c4b N |
7189 | err = -ENODEV; |
7190 | else { | |
7191 | md_error(mddev, rdev); | |
7192 | if (!test_bit(Faulty, &rdev->flags)) | |
7193 | err = -EBUSY; | |
7194 | } | |
7195 | rcu_read_unlock(); | |
7196 | return err; | |
1da177e4 LT |
7197 | } |
7198 | ||
2f9618ce AN |
7199 | /* |
7200 | * We have a problem here : there is no easy way to give a CHS | |
7201 | * virtual geometry. We currently pretend that we have a 2 heads | |
7202 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7203 | * dosfs just mad... ;-) | |
7204 | */ | |
a885c8c4 CH |
7205 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7206 | { | |
fd01b88c | 7207 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7208 | |
7209 | geo->heads = 2; | |
7210 | geo->sectors = 4; | |
49ce6cea | 7211 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7212 | return 0; |
7213 | } | |
7214 | ||
cb335f88 NS |
7215 | static inline bool md_ioctl_valid(unsigned int cmd) |
7216 | { | |
7217 | switch (cmd) { | |
7218 | case ADD_NEW_DISK: | |
7219 | case BLKROSET: | |
7220 | case GET_ARRAY_INFO: | |
7221 | case GET_BITMAP_FILE: | |
7222 | case GET_DISK_INFO: | |
7223 | case HOT_ADD_DISK: | |
7224 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7225 | case RAID_AUTORUN: |
7226 | case RAID_VERSION: | |
7227 | case RESTART_ARRAY_RW: | |
7228 | case RUN_ARRAY: | |
7229 | case SET_ARRAY_INFO: | |
7230 | case SET_BITMAP_FILE: | |
7231 | case SET_DISK_FAULTY: | |
7232 | case STOP_ARRAY: | |
7233 | case STOP_ARRAY_RO: | |
1aee41f6 | 7234 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7235 | return true; |
7236 | default: | |
7237 | return false; | |
7238 | } | |
7239 | } | |
7240 | ||
a39907fa | 7241 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7242 | unsigned int cmd, unsigned long arg) |
7243 | { | |
7244 | int err = 0; | |
7245 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7246 | struct mddev *mddev = NULL; |
e2218350 | 7247 | int ro; |
065e519e | 7248 | bool did_set_md_closing = false; |
1da177e4 | 7249 | |
cb335f88 NS |
7250 | if (!md_ioctl_valid(cmd)) |
7251 | return -ENOTTY; | |
7252 | ||
506c9e44 N |
7253 | switch (cmd) { |
7254 | case RAID_VERSION: | |
7255 | case GET_ARRAY_INFO: | |
7256 | case GET_DISK_INFO: | |
7257 | break; | |
7258 | default: | |
7259 | if (!capable(CAP_SYS_ADMIN)) | |
7260 | return -EACCES; | |
7261 | } | |
1da177e4 LT |
7262 | |
7263 | /* | |
7264 | * Commands dealing with the RAID driver but not any | |
7265 | * particular array: | |
7266 | */ | |
c02c0aeb N |
7267 | switch (cmd) { |
7268 | case RAID_VERSION: | |
7269 | err = get_version(argp); | |
3adc28d8 | 7270 | goto out; |
1da177e4 | 7271 | |
1da177e4 | 7272 | #ifndef MODULE |
c02c0aeb N |
7273 | case RAID_AUTORUN: |
7274 | err = 0; | |
7275 | autostart_arrays(arg); | |
3adc28d8 | 7276 | goto out; |
1da177e4 | 7277 | #endif |
c02c0aeb | 7278 | default:; |
1da177e4 LT |
7279 | } |
7280 | ||
7281 | /* | |
7282 | * Commands creating/starting a new array: | |
7283 | */ | |
7284 | ||
a39907fa | 7285 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7286 | |
7287 | if (!mddev) { | |
7288 | BUG(); | |
3adc28d8 | 7289 | goto out; |
1da177e4 LT |
7290 | } |
7291 | ||
1ca69c4b N |
7292 | /* Some actions do not requires the mutex */ |
7293 | switch (cmd) { | |
7294 | case GET_ARRAY_INFO: | |
7295 | if (!mddev->raid_disks && !mddev->external) | |
7296 | err = -ENODEV; | |
7297 | else | |
7298 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7299 | goto out; |
1ca69c4b N |
7300 | |
7301 | case GET_DISK_INFO: | |
7302 | if (!mddev->raid_disks && !mddev->external) | |
7303 | err = -ENODEV; | |
7304 | else | |
7305 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7306 | goto out; |
1ca69c4b N |
7307 | |
7308 | case SET_DISK_FAULTY: | |
7309 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7310 | goto out; |
4af1a041 N |
7311 | |
7312 | case GET_BITMAP_FILE: | |
7313 | err = get_bitmap_file(mddev, argp); | |
7314 | goto out; | |
7315 | ||
1ca69c4b N |
7316 | } |
7317 | ||
a7a3f08d N |
7318 | if (cmd == ADD_NEW_DISK) |
7319 | /* need to ensure md_delayed_delete() has completed */ | |
7320 | flush_workqueue(md_misc_wq); | |
7321 | ||
90f5f7ad HR |
7322 | if (cmd == HOT_REMOVE_DISK) |
7323 | /* need to ensure recovery thread has run */ | |
7324 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7325 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7326 | &mddev->recovery), |
90f5f7ad | 7327 | msecs_to_jiffies(5000)); |
260fa034 N |
7328 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7329 | /* Need to flush page cache, and ensure no-one else opens | |
7330 | * and writes | |
7331 | */ | |
7332 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7333 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7334 | mutex_unlock(&mddev->open_mutex); |
7335 | err = -EBUSY; | |
3adc28d8 | 7336 | goto out; |
260fa034 | 7337 | } |
065e519e | 7338 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7339 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7340 | did_set_md_closing = true; |
260fa034 N |
7341 | mutex_unlock(&mddev->open_mutex); |
7342 | sync_blockdev(bdev); | |
7343 | } | |
1da177e4 LT |
7344 | err = mddev_lock(mddev); |
7345 | if (err) { | |
9d48739e N |
7346 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7347 | err, cmd); | |
3adc28d8 | 7348 | goto out; |
1da177e4 LT |
7349 | } |
7350 | ||
c02c0aeb N |
7351 | if (cmd == SET_ARRAY_INFO) { |
7352 | mdu_array_info_t info; | |
7353 | if (!arg) | |
7354 | memset(&info, 0, sizeof(info)); | |
7355 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7356 | err = -EFAULT; | |
3adc28d8 | 7357 | goto unlock; |
c02c0aeb N |
7358 | } |
7359 | if (mddev->pers) { | |
7360 | err = update_array_info(mddev, &info); | |
7361 | if (err) { | |
9d48739e | 7362 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7363 | goto unlock; |
1da177e4 | 7364 | } |
3adc28d8 | 7365 | goto unlock; |
c02c0aeb N |
7366 | } |
7367 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7368 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7369 | err = -EBUSY; |
3adc28d8 | 7370 | goto unlock; |
c02c0aeb N |
7371 | } |
7372 | if (mddev->raid_disks) { | |
9d48739e | 7373 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7374 | err = -EBUSY; |
3adc28d8 | 7375 | goto unlock; |
c02c0aeb N |
7376 | } |
7377 | err = set_array_info(mddev, &info); | |
7378 | if (err) { | |
9d48739e | 7379 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7380 | goto unlock; |
c02c0aeb | 7381 | } |
3adc28d8 | 7382 | goto unlock; |
1da177e4 LT |
7383 | } |
7384 | ||
7385 | /* | |
7386 | * Commands querying/configuring an existing array: | |
7387 | */ | |
32a7627c | 7388 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7389 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7390 | if ((!mddev->raid_disks && !mddev->external) |
7391 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7392 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7393 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7394 | err = -ENODEV; |
3adc28d8 | 7395 | goto unlock; |
1da177e4 LT |
7396 | } |
7397 | ||
7398 | /* | |
7399 | * Commands even a read-only array can execute: | |
7400 | */ | |
c02c0aeb | 7401 | switch (cmd) { |
c02c0aeb N |
7402 | case RESTART_ARRAY_RW: |
7403 | err = restart_array(mddev); | |
3adc28d8 | 7404 | goto unlock; |
1da177e4 | 7405 | |
c02c0aeb N |
7406 | case STOP_ARRAY: |
7407 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7408 | goto unlock; |
1da177e4 | 7409 | |
c02c0aeb N |
7410 | case STOP_ARRAY_RO: |
7411 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7412 | goto unlock; |
1da177e4 | 7413 | |
3ea8929d N |
7414 | case HOT_REMOVE_DISK: |
7415 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7416 | goto unlock; |
3ea8929d | 7417 | |
7ceb17e8 N |
7418 | case ADD_NEW_DISK: |
7419 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7420 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7421 | * So require mddev->pers and MD_DISK_SYNC. |
7422 | */ | |
7423 | if (mddev->pers) { | |
7424 | mdu_disk_info_t info; | |
7425 | if (copy_from_user(&info, argp, sizeof(info))) | |
7426 | err = -EFAULT; | |
7427 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7428 | /* Need to clear read-only for this */ | |
7429 | break; | |
7430 | else | |
7431 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7432 | goto unlock; |
7ceb17e8 N |
7433 | } |
7434 | break; | |
7435 | ||
c02c0aeb N |
7436 | case BLKROSET: |
7437 | if (get_user(ro, (int __user *)(arg))) { | |
7438 | err = -EFAULT; | |
3adc28d8 | 7439 | goto unlock; |
c02c0aeb N |
7440 | } |
7441 | err = -EINVAL; | |
e2218350 | 7442 | |
c02c0aeb N |
7443 | /* if the bdev is going readonly the value of mddev->ro |
7444 | * does not matter, no writes are coming | |
7445 | */ | |
7446 | if (ro) | |
3adc28d8 | 7447 | goto unlock; |
e2218350 | 7448 | |
c02c0aeb N |
7449 | /* are we are already prepared for writes? */ |
7450 | if (mddev->ro != 1) | |
3adc28d8 | 7451 | goto unlock; |
e2218350 | 7452 | |
c02c0aeb N |
7453 | /* transitioning to readauto need only happen for |
7454 | * arrays that call md_write_start | |
7455 | */ | |
7456 | if (mddev->pers) { | |
7457 | err = restart_array(mddev); | |
7458 | if (err == 0) { | |
7459 | mddev->ro = 2; | |
7460 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7461 | } |
c02c0aeb | 7462 | } |
3adc28d8 | 7463 | goto unlock; |
1da177e4 LT |
7464 | } |
7465 | ||
7466 | /* | |
7467 | * The remaining ioctls are changing the state of the | |
f91de92e | 7468 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7469 | */ |
326eb17d | 7470 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7471 | if (mddev->ro == 2) { |
7472 | mddev->ro = 0; | |
00bcb4ac | 7473 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7474 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7475 | /* mddev_unlock will wake thread */ |
7476 | /* If a device failed while we were read-only, we | |
7477 | * need to make sure the metadata is updated now. | |
7478 | */ | |
2953079c | 7479 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7480 | mddev_unlock(mddev); |
7481 | wait_event(mddev->sb_wait, | |
2953079c SL |
7482 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7483 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7484 | mddev_lock_nointr(mddev); |
f3378b48 | 7485 | } |
f91de92e N |
7486 | } else { |
7487 | err = -EROFS; | |
3adc28d8 | 7488 | goto unlock; |
f91de92e | 7489 | } |
1da177e4 LT |
7490 | } |
7491 | ||
c02c0aeb N |
7492 | switch (cmd) { |
7493 | case ADD_NEW_DISK: | |
1da177e4 | 7494 | { |
c02c0aeb N |
7495 | mdu_disk_info_t info; |
7496 | if (copy_from_user(&info, argp, sizeof(info))) | |
7497 | err = -EFAULT; | |
7498 | else | |
7499 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7500 | goto unlock; |
c02c0aeb | 7501 | } |
1da177e4 | 7502 | |
1aee41f6 GR |
7503 | case CLUSTERED_DISK_NACK: |
7504 | if (mddev_is_clustered(mddev)) | |
7505 | md_cluster_ops->new_disk_ack(mddev, false); | |
7506 | else | |
7507 | err = -EINVAL; | |
7508 | goto unlock; | |
7509 | ||
c02c0aeb N |
7510 | case HOT_ADD_DISK: |
7511 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7512 | goto unlock; |
1da177e4 | 7513 | |
c02c0aeb N |
7514 | case RUN_ARRAY: |
7515 | err = do_md_run(mddev); | |
3adc28d8 | 7516 | goto unlock; |
1da177e4 | 7517 | |
c02c0aeb N |
7518 | case SET_BITMAP_FILE: |
7519 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7520 | goto unlock; |
32a7627c | 7521 | |
c02c0aeb N |
7522 | default: |
7523 | err = -EINVAL; | |
3adc28d8 | 7524 | goto unlock; |
1da177e4 LT |
7525 | } |
7526 | ||
3adc28d8 | 7527 | unlock: |
d3374825 N |
7528 | if (mddev->hold_active == UNTIL_IOCTL && |
7529 | err != -EINVAL) | |
7530 | mddev->hold_active = 0; | |
1da177e4 | 7531 | mddev_unlock(mddev); |
3adc28d8 | 7532 | out: |
065e519e N |
7533 | if(did_set_md_closing) |
7534 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7535 | return err; |
7536 | } | |
aa98aa31 AB |
7537 | #ifdef CONFIG_COMPAT |
7538 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7539 | unsigned int cmd, unsigned long arg) | |
7540 | { | |
7541 | switch (cmd) { | |
7542 | case HOT_REMOVE_DISK: | |
7543 | case HOT_ADD_DISK: | |
7544 | case SET_DISK_FAULTY: | |
7545 | case SET_BITMAP_FILE: | |
7546 | /* These take in integer arg, do not convert */ | |
7547 | break; | |
7548 | default: | |
7549 | arg = (unsigned long)compat_ptr(arg); | |
7550 | break; | |
7551 | } | |
7552 | ||
7553 | return md_ioctl(bdev, mode, cmd, arg); | |
7554 | } | |
7555 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7556 | |
a39907fa | 7557 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7558 | { |
7559 | /* | |
7560 | * Succeed if we can lock the mddev, which confirms that | |
7561 | * it isn't being stopped right now. | |
7562 | */ | |
fd01b88c | 7563 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7564 | int err; |
7565 | ||
0c098220 YL |
7566 | if (!mddev) |
7567 | return -ENODEV; | |
7568 | ||
d3374825 N |
7569 | if (mddev->gendisk != bdev->bd_disk) { |
7570 | /* we are racing with mddev_put which is discarding this | |
7571 | * bd_disk. | |
7572 | */ | |
7573 | mddev_put(mddev); | |
7574 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7575 | flush_workqueue(md_misc_wq); |
d3374825 N |
7576 | /* Then retry the open from the top */ |
7577 | return -ERESTARTSYS; | |
7578 | } | |
7579 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7580 | ||
c8c00a69 | 7581 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7582 | goto out; |
7583 | ||
af8d8e6f GJ |
7584 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7585 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7586 | err = -ENODEV; |
7587 | goto out; | |
af8d8e6f GJ |
7588 | } |
7589 | ||
1da177e4 | 7590 | err = 0; |
f2ea68cf | 7591 | atomic_inc(&mddev->openers); |
c8c00a69 | 7592 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7593 | |
f0b4f7e2 | 7594 | check_disk_change(bdev); |
1da177e4 | 7595 | out: |
e2342ca8 N |
7596 | if (err) |
7597 | mddev_put(mddev); | |
1da177e4 LT |
7598 | return err; |
7599 | } | |
7600 | ||
db2a144b | 7601 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7602 | { |
f72ffdd6 | 7603 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7604 | |
52e5f9d1 | 7605 | BUG_ON(!mddev); |
f2ea68cf | 7606 | atomic_dec(&mddev->openers); |
1da177e4 | 7607 | mddev_put(mddev); |
1da177e4 | 7608 | } |
f0b4f7e2 N |
7609 | |
7610 | static int md_media_changed(struct gendisk *disk) | |
7611 | { | |
fd01b88c | 7612 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7613 | |
7614 | return mddev->changed; | |
7615 | } | |
7616 | ||
7617 | static int md_revalidate(struct gendisk *disk) | |
7618 | { | |
fd01b88c | 7619 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7620 | |
7621 | mddev->changed = 0; | |
7622 | return 0; | |
7623 | } | |
83d5cde4 | 7624 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7625 | { |
7626 | .owner = THIS_MODULE, | |
a39907fa AV |
7627 | .open = md_open, |
7628 | .release = md_release, | |
b492b852 | 7629 | .ioctl = md_ioctl, |
aa98aa31 AB |
7630 | #ifdef CONFIG_COMPAT |
7631 | .compat_ioctl = md_compat_ioctl, | |
7632 | #endif | |
a885c8c4 | 7633 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7634 | .media_changed = md_media_changed, |
7635 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7636 | }; |
7637 | ||
f72ffdd6 | 7638 | static int md_thread(void *arg) |
1da177e4 | 7639 | { |
2b8bf345 | 7640 | struct md_thread *thread = arg; |
1da177e4 | 7641 | |
1da177e4 LT |
7642 | /* |
7643 | * md_thread is a 'system-thread', it's priority should be very | |
7644 | * high. We avoid resource deadlocks individually in each | |
7645 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7646 | * the very same RT priority as kswapd, thus we will never get | |
7647 | * into a priority inversion deadlock. | |
7648 | * | |
7649 | * we definitely have to have equal or higher priority than | |
7650 | * bdflush, otherwise bdflush will deadlock if there are too | |
7651 | * many dirty RAID5 blocks. | |
7652 | */ | |
1da177e4 | 7653 | |
6985c43f | 7654 | allow_signal(SIGKILL); |
a6fb0934 | 7655 | while (!kthread_should_stop()) { |
1da177e4 | 7656 | |
93588e22 N |
7657 | /* We need to wait INTERRUPTIBLE so that |
7658 | * we don't add to the load-average. | |
7659 | * That means we need to be sure no signals are | |
7660 | * pending | |
7661 | */ | |
7662 | if (signal_pending(current)) | |
7663 | flush_signals(current); | |
7664 | ||
7665 | wait_event_interruptible_timeout | |
7666 | (thread->wqueue, | |
7667 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7668 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7669 | thread->timeout); |
1da177e4 | 7670 | |
6c987910 | 7671 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7672 | if (kthread_should_park()) |
7673 | kthread_parkme(); | |
6c987910 | 7674 | if (!kthread_should_stop()) |
4ed8731d | 7675 | thread->run(thread); |
1da177e4 | 7676 | } |
a6fb0934 | 7677 | |
1da177e4 LT |
7678 | return 0; |
7679 | } | |
7680 | ||
2b8bf345 | 7681 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7682 | { |
7683 | if (thread) { | |
36a4e1fe | 7684 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7685 | set_bit(THREAD_WAKEUP, &thread->flags); |
7686 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7687 | } |
7688 | } | |
6c144d31 | 7689 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7690 | |
4ed8731d SL |
7691 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7692 | struct mddev *mddev, const char *name) | |
1da177e4 | 7693 | { |
2b8bf345 | 7694 | struct md_thread *thread; |
1da177e4 | 7695 | |
2b8bf345 | 7696 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7697 | if (!thread) |
7698 | return NULL; | |
7699 | ||
1da177e4 LT |
7700 | init_waitqueue_head(&thread->wqueue); |
7701 | ||
1da177e4 LT |
7702 | thread->run = run; |
7703 | thread->mddev = mddev; | |
32a7627c | 7704 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7705 | thread->tsk = kthread_run(md_thread, thread, |
7706 | "%s_%s", | |
7707 | mdname(thread->mddev), | |
0232605d | 7708 | name); |
a6fb0934 | 7709 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7710 | kfree(thread); |
7711 | return NULL; | |
7712 | } | |
1da177e4 LT |
7713 | return thread; |
7714 | } | |
6c144d31 | 7715 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7716 | |
2b8bf345 | 7717 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7718 | { |
2b8bf345 | 7719 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7720 | if (!thread) |
7721 | return; | |
36a4e1fe | 7722 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7723 | /* Locking ensures that mddev_unlock does not wake_up a |
7724 | * non-existent thread | |
7725 | */ | |
7726 | spin_lock(&pers_lock); | |
7727 | *threadp = NULL; | |
7728 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7729 | |
7730 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7731 | kfree(thread); |
7732 | } | |
6c144d31 | 7733 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7734 | |
fd01b88c | 7735 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7736 | { |
b2d444d7 | 7737 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7738 | return; |
6bfe0b49 | 7739 | |
de393cde | 7740 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7741 | return; |
7742 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7743 | if (mddev->degraded) |
7744 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7745 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7746 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7747 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7748 | md_wakeup_thread(mddev->thread); | |
768a418d | 7749 | if (mddev->event_work.func) |
e804ac78 | 7750 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7751 | md_new_event(mddev); |
1da177e4 | 7752 | } |
6c144d31 | 7753 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7754 | |
7755 | /* seq_file implementation /proc/mdstat */ | |
7756 | ||
7757 | static void status_unused(struct seq_file *seq) | |
7758 | { | |
7759 | int i = 0; | |
3cb03002 | 7760 | struct md_rdev *rdev; |
1da177e4 LT |
7761 | |
7762 | seq_printf(seq, "unused devices: "); | |
7763 | ||
159ec1fc | 7764 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7765 | char b[BDEVNAME_SIZE]; |
7766 | i++; | |
7767 | seq_printf(seq, "%s ", | |
7768 | bdevname(rdev->bdev,b)); | |
7769 | } | |
7770 | if (!i) | |
7771 | seq_printf(seq, "<none>"); | |
7772 | ||
7773 | seq_printf(seq, "\n"); | |
7774 | } | |
7775 | ||
f7851be7 | 7776 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7777 | { |
dd71cf6b | 7778 | sector_t max_sectors, resync, res; |
9642fa73 MT |
7779 | unsigned long dt, db = 0; |
7780 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
7781 | int scale, recovery_active; | |
4588b42e | 7782 | unsigned int per_milli; |
1da177e4 | 7783 | |
c804cdec N |
7784 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7785 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7786 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7787 | else |
dd71cf6b | 7788 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7789 | |
f7851be7 N |
7790 | resync = mddev->curr_resync; |
7791 | if (resync <= 3) { | |
7792 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7793 | /* Still cleaning up */ | |
7794 | resync = max_sectors; | |
d2e2ec82 ND |
7795 | } else if (resync > max_sectors) |
7796 | resync = max_sectors; | |
7797 | else | |
f7851be7 N |
7798 | resync -= atomic_read(&mddev->recovery_active); |
7799 | ||
7800 | if (resync == 0) { | |
0357ba27 GJ |
7801 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
7802 | struct md_rdev *rdev; | |
7803 | ||
7804 | rdev_for_each(rdev, mddev) | |
7805 | if (rdev->raid_disk >= 0 && | |
7806 | !test_bit(Faulty, &rdev->flags) && | |
7807 | rdev->recovery_offset != MaxSector && | |
7808 | rdev->recovery_offset) { | |
7809 | seq_printf(seq, "\trecover=REMOTE"); | |
7810 | return 1; | |
7811 | } | |
7812 | if (mddev->reshape_position != MaxSector) | |
7813 | seq_printf(seq, "\treshape=REMOTE"); | |
7814 | else | |
7815 | seq_printf(seq, "\tresync=REMOTE"); | |
7816 | return 1; | |
7817 | } | |
f7851be7 N |
7818 | if (mddev->recovery_cp < MaxSector) { |
7819 | seq_printf(seq, "\tresync=PENDING"); | |
7820 | return 1; | |
7821 | } | |
7822 | return 0; | |
7823 | } | |
7824 | if (resync < 3) { | |
7825 | seq_printf(seq, "\tresync=DELAYED"); | |
7826 | return 1; | |
7827 | } | |
7828 | ||
403df478 | 7829 | WARN_ON(max_sectors == 0); |
4588b42e | 7830 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7831 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7832 | * u32, as those are the requirements for sector_div. |
7833 | * Thus 'scale' must be at least 10 | |
7834 | */ | |
7835 | scale = 10; | |
7836 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7837 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7838 | scale++; |
7839 | } | |
7840 | res = (resync>>scale)*1000; | |
dd71cf6b | 7841 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7842 | |
7843 | per_milli = res; | |
1da177e4 | 7844 | { |
4588b42e | 7845 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7846 | seq_printf(seq, "["); |
7847 | for (i = 0; i < x; i++) | |
7848 | seq_printf(seq, "="); | |
7849 | seq_printf(seq, ">"); | |
7850 | for (i = 0; i < y; i++) | |
7851 | seq_printf(seq, "."); | |
7852 | seq_printf(seq, "] "); | |
7853 | } | |
4588b42e | 7854 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7855 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7856 | "reshape" : | |
61df9d91 N |
7857 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7858 | "check" : | |
7859 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7860 | "resync" : "recovery"))), | |
7861 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7862 | (unsigned long long) resync/2, |
7863 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7864 | |
7865 | /* | |
1da177e4 LT |
7866 | * dt: time from mark until now |
7867 | * db: blocks written from mark until now | |
7868 | * rt: remaining time | |
dd71cf6b | 7869 | * |
9642fa73 MT |
7870 | * rt is a sector_t, which is always 64bit now. We are keeping |
7871 | * the original algorithm, but it is not really necessary. | |
7872 | * | |
7873 | * Original algorithm: | |
7874 | * So we divide before multiply in case it is 32bit and close | |
7875 | * to the limit. | |
7876 | * We scale the divisor (db) by 32 to avoid losing precision | |
7877 | * near the end of resync when the number of remaining sectors | |
7878 | * is close to 'db'. | |
7879 | * We then divide rt by 32 after multiplying by db to compensate. | |
7880 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7881 | */ |
7882 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7883 | if (!dt) dt++; | |
9642fa73 MT |
7884 | |
7885 | curr_mark_cnt = mddev->curr_mark_cnt; | |
7886 | recovery_active = atomic_read(&mddev->recovery_active); | |
7887 | resync_mark_cnt = mddev->resync_mark_cnt; | |
7888 | ||
7889 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
7890 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 7891 | |
dd71cf6b | 7892 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 7893 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
7894 | rt *= dt; |
7895 | rt >>= 5; | |
7896 | ||
7897 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7898 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7899 | |
ff4e8d9a | 7900 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7901 | return 1; |
1da177e4 LT |
7902 | } |
7903 | ||
7904 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7905 | { | |
7906 | struct list_head *tmp; | |
7907 | loff_t l = *pos; | |
fd01b88c | 7908 | struct mddev *mddev; |
1da177e4 LT |
7909 | |
7910 | if (l >= 0x10000) | |
7911 | return NULL; | |
7912 | if (!l--) | |
7913 | /* header */ | |
7914 | return (void*)1; | |
7915 | ||
7916 | spin_lock(&all_mddevs_lock); | |
7917 | list_for_each(tmp,&all_mddevs) | |
7918 | if (!l--) { | |
fd01b88c | 7919 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7920 | mddev_get(mddev); |
7921 | spin_unlock(&all_mddevs_lock); | |
7922 | return mddev; | |
7923 | } | |
7924 | spin_unlock(&all_mddevs_lock); | |
7925 | if (!l--) | |
7926 | return (void*)2;/* tail */ | |
7927 | return NULL; | |
7928 | } | |
7929 | ||
7930 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7931 | { | |
7932 | struct list_head *tmp; | |
fd01b88c | 7933 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7934 | |
1da177e4 LT |
7935 | ++*pos; |
7936 | if (v == (void*)2) | |
7937 | return NULL; | |
7938 | ||
7939 | spin_lock(&all_mddevs_lock); | |
7940 | if (v == (void*)1) | |
7941 | tmp = all_mddevs.next; | |
7942 | else | |
7943 | tmp = mddev->all_mddevs.next; | |
7944 | if (tmp != &all_mddevs) | |
fd01b88c | 7945 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7946 | else { |
7947 | next_mddev = (void*)2; | |
7948 | *pos = 0x10000; | |
f72ffdd6 | 7949 | } |
1da177e4 LT |
7950 | spin_unlock(&all_mddevs_lock); |
7951 | ||
7952 | if (v != (void*)1) | |
7953 | mddev_put(mddev); | |
7954 | return next_mddev; | |
7955 | ||
7956 | } | |
7957 | ||
7958 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7959 | { | |
fd01b88c | 7960 | struct mddev *mddev = v; |
1da177e4 LT |
7961 | |
7962 | if (mddev && v != (void*)1 && v != (void*)2) | |
7963 | mddev_put(mddev); | |
7964 | } | |
7965 | ||
7966 | static int md_seq_show(struct seq_file *seq, void *v) | |
7967 | { | |
fd01b88c | 7968 | struct mddev *mddev = v; |
dd8ac336 | 7969 | sector_t sectors; |
3cb03002 | 7970 | struct md_rdev *rdev; |
1da177e4 LT |
7971 | |
7972 | if (v == (void*)1) { | |
84fc4b56 | 7973 | struct md_personality *pers; |
1da177e4 LT |
7974 | seq_printf(seq, "Personalities : "); |
7975 | spin_lock(&pers_lock); | |
2604b703 N |
7976 | list_for_each_entry(pers, &pers_list, list) |
7977 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7978 | |
7979 | spin_unlock(&pers_lock); | |
7980 | seq_printf(seq, "\n"); | |
f1514638 | 7981 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7982 | return 0; |
7983 | } | |
7984 | if (v == (void*)2) { | |
7985 | status_unused(seq); | |
7986 | return 0; | |
7987 | } | |
7988 | ||
36d091f4 | 7989 | spin_lock(&mddev->lock); |
1da177e4 LT |
7990 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7991 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7992 | mddev->pers ? "" : "in"); | |
7993 | if (mddev->pers) { | |
f91de92e | 7994 | if (mddev->ro==1) |
1da177e4 | 7995 | seq_printf(seq, " (read-only)"); |
f91de92e | 7996 | if (mddev->ro==2) |
52720ae7 | 7997 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7998 | seq_printf(seq, " %s", mddev->pers->name); |
7999 | } | |
8000 | ||
dd8ac336 | 8001 | sectors = 0; |
f97fcad3 N |
8002 | rcu_read_lock(); |
8003 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
8004 | char b[BDEVNAME_SIZE]; |
8005 | seq_printf(seq, " %s[%d]", | |
8006 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
8007 | if (test_bit(WriteMostly, &rdev->flags)) |
8008 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
8009 | if (test_bit(Journal, &rdev->flags)) |
8010 | seq_printf(seq, "(J)"); | |
b2d444d7 | 8011 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
8012 | seq_printf(seq, "(F)"); |
8013 | continue; | |
2d78f8c4 N |
8014 | } |
8015 | if (rdev->raid_disk < 0) | |
b325a32e | 8016 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
8017 | if (test_bit(Replacement, &rdev->flags)) |
8018 | seq_printf(seq, "(R)"); | |
dd8ac336 | 8019 | sectors += rdev->sectors; |
1da177e4 | 8020 | } |
f97fcad3 | 8021 | rcu_read_unlock(); |
1da177e4 LT |
8022 | |
8023 | if (!list_empty(&mddev->disks)) { | |
8024 | if (mddev->pers) | |
8025 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
8026 | (unsigned long long) |
8027 | mddev->array_sectors / 2); | |
1da177e4 LT |
8028 | else |
8029 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 8030 | (unsigned long long)sectors / 2); |
1da177e4 | 8031 | } |
1cd6bf19 N |
8032 | if (mddev->persistent) { |
8033 | if (mddev->major_version != 0 || | |
8034 | mddev->minor_version != 90) { | |
8035 | seq_printf(seq," super %d.%d", | |
8036 | mddev->major_version, | |
8037 | mddev->minor_version); | |
8038 | } | |
e691063a N |
8039 | } else if (mddev->external) |
8040 | seq_printf(seq, " super external:%s", | |
8041 | mddev->metadata_type); | |
8042 | else | |
1cd6bf19 | 8043 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8044 | |
8045 | if (mddev->pers) { | |
d710e138 | 8046 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8047 | seq_printf(seq, "\n "); |
8e1b39d6 | 8048 | if (mddev->pers->sync_request) { |
f7851be7 | 8049 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8050 | seq_printf(seq, "\n "); |
8e1b39d6 | 8051 | } |
32a7627c N |
8052 | } else |
8053 | seq_printf(seq, "\n "); | |
8054 | ||
e64e4018 | 8055 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8056 | |
8057 | seq_printf(seq, "\n"); | |
8058 | } | |
36d091f4 | 8059 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8060 | |
1da177e4 LT |
8061 | return 0; |
8062 | } | |
8063 | ||
110518bc | 8064 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8065 | .start = md_seq_start, |
8066 | .next = md_seq_next, | |
8067 | .stop = md_seq_stop, | |
8068 | .show = md_seq_show, | |
8069 | }; | |
8070 | ||
8071 | static int md_seq_open(struct inode *inode, struct file *file) | |
8072 | { | |
f1514638 | 8073 | struct seq_file *seq; |
1da177e4 LT |
8074 | int error; |
8075 | ||
8076 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8077 | if (error) |
f1514638 KS |
8078 | return error; |
8079 | ||
8080 | seq = file->private_data; | |
8081 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8082 | return error; |
8083 | } | |
8084 | ||
e2f23b60 | 8085 | static int md_unloading; |
afc9a42b | 8086 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8087 | { |
f1514638 | 8088 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8089 | __poll_t mask; |
d7603b7e | 8090 | |
e2f23b60 | 8091 | if (md_unloading) |
a9a08845 | 8092 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8093 | poll_wait(filp, &md_event_waiters, wait); |
8094 | ||
8095 | /* always allow read */ | |
a9a08845 | 8096 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8097 | |
f1514638 | 8098 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8099 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8100 | return mask; |
8101 | } | |
8102 | ||
fa027c2a | 8103 | static const struct file_operations md_seq_fops = { |
e24650c2 | 8104 | .owner = THIS_MODULE, |
1da177e4 LT |
8105 | .open = md_seq_open, |
8106 | .read = seq_read, | |
8107 | .llseek = seq_lseek, | |
26e13043 | 8108 | .release = seq_release, |
d7603b7e | 8109 | .poll = mdstat_poll, |
1da177e4 LT |
8110 | }; |
8111 | ||
84fc4b56 | 8112 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8113 | { |
9d48739e N |
8114 | pr_debug("md: %s personality registered for level %d\n", |
8115 | p->name, p->level); | |
1da177e4 | 8116 | spin_lock(&pers_lock); |
2604b703 | 8117 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8118 | spin_unlock(&pers_lock); |
8119 | return 0; | |
8120 | } | |
6c144d31 | 8121 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8122 | |
84fc4b56 | 8123 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8124 | { |
9d48739e | 8125 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8126 | spin_lock(&pers_lock); |
2604b703 | 8127 | list_del_init(&p->list); |
1da177e4 LT |
8128 | spin_unlock(&pers_lock); |
8129 | return 0; | |
8130 | } | |
6c144d31 | 8131 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8132 | |
6022e75b N |
8133 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8134 | struct module *module) | |
edb39c9d | 8135 | { |
6022e75b | 8136 | int ret = 0; |
edb39c9d | 8137 | spin_lock(&pers_lock); |
6022e75b N |
8138 | if (md_cluster_ops != NULL) |
8139 | ret = -EALREADY; | |
8140 | else { | |
8141 | md_cluster_ops = ops; | |
8142 | md_cluster_mod = module; | |
8143 | } | |
edb39c9d | 8144 | spin_unlock(&pers_lock); |
6022e75b | 8145 | return ret; |
edb39c9d GR |
8146 | } |
8147 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8148 | ||
8149 | int unregister_md_cluster_operations(void) | |
8150 | { | |
8151 | spin_lock(&pers_lock); | |
8152 | md_cluster_ops = NULL; | |
8153 | spin_unlock(&pers_lock); | |
8154 | return 0; | |
8155 | } | |
8156 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8157 | ||
8158 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8159 | { | |
47a7b0d8 GJ |
8160 | if (!md_cluster_ops) |
8161 | request_module("md-cluster"); | |
edb39c9d | 8162 | spin_lock(&pers_lock); |
47a7b0d8 | 8163 | /* ensure module won't be unloaded */ |
edb39c9d | 8164 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8165 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8166 | spin_unlock(&pers_lock); |
8167 | return -ENOENT; | |
8168 | } | |
8169 | spin_unlock(&pers_lock); | |
8170 | ||
cf921cc1 | 8171 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
8172 | } |
8173 | ||
8174 | void md_cluster_stop(struct mddev *mddev) | |
8175 | { | |
c4ce867f GR |
8176 | if (!md_cluster_ops) |
8177 | return; | |
edb39c9d GR |
8178 | md_cluster_ops->leave(mddev); |
8179 | module_put(md_cluster_mod); | |
8180 | } | |
8181 | ||
fd01b88c | 8182 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8183 | { |
f72ffdd6 | 8184 | struct md_rdev *rdev; |
1da177e4 | 8185 | int idle; |
eea1bf38 | 8186 | int curr_events; |
1da177e4 LT |
8187 | |
8188 | idle = 1; | |
4b80991c N |
8189 | rcu_read_lock(); |
8190 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8191 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
59767fbd | 8192 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8193 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8194 | /* sync IO will cause sync_io to increase before the disk_stats |
8195 | * as sync_io is counted when a request starts, and | |
8196 | * disk_stats is counted when it completes. | |
8197 | * So resync activity will cause curr_events to be smaller than | |
8198 | * when there was no such activity. | |
8199 | * non-sync IO will cause disk_stat to increase without | |
8200 | * increasing sync_io so curr_events will (eventually) | |
8201 | * be larger than it was before. Once it becomes | |
8202 | * substantially larger, the test below will cause | |
8203 | * the array to appear non-idle, and resync will slow | |
8204 | * down. | |
8205 | * If there is a lot of outstanding resync activity when | |
8206 | * we set last_event to curr_events, then all that activity | |
8207 | * completing might cause the array to appear non-idle | |
8208 | * and resync will be slowed down even though there might | |
8209 | * not have been non-resync activity. This will only | |
8210 | * happen once though. 'last_events' will soon reflect | |
8211 | * the state where there is little or no outstanding | |
8212 | * resync requests, and further resync activity will | |
8213 | * always make curr_events less than last_events. | |
c0e48521 | 8214 | * |
1da177e4 | 8215 | */ |
eea1bf38 | 8216 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8217 | rdev->last_events = curr_events; |
8218 | idle = 0; | |
8219 | } | |
8220 | } | |
4b80991c | 8221 | rcu_read_unlock(); |
1da177e4 LT |
8222 | return idle; |
8223 | } | |
8224 | ||
fd01b88c | 8225 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8226 | { |
8227 | /* another "blocks" (512byte) blocks have been synced */ | |
8228 | atomic_sub(blocks, &mddev->recovery_active); | |
8229 | wake_up(&mddev->recovery_wait); | |
8230 | if (!ok) { | |
dfc70645 | 8231 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8232 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8233 | md_wakeup_thread(mddev->thread); |
8234 | // stop recovery, signal do_sync .... | |
8235 | } | |
8236 | } | |
6c144d31 | 8237 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8238 | |
06d91a5f N |
8239 | /* md_write_start(mddev, bi) |
8240 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8241 | * in superblock) before writing, schedule a superblock update |
8242 | * and wait for it to complete. | |
cc27b0c7 N |
8243 | * A return value of 'false' means that the write wasn't recorded |
8244 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8245 | */ |
cc27b0c7 | 8246 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8247 | { |
0fd62b86 | 8248 | int did_change = 0; |
4b6c1060 | 8249 | |
06d91a5f | 8250 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8251 | return true; |
06d91a5f | 8252 | |
f91de92e N |
8253 | BUG_ON(mddev->ro == 1); |
8254 | if (mddev->ro == 2) { | |
8255 | /* need to switch to read/write */ | |
8256 | mddev->ro = 0; | |
8257 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8258 | md_wakeup_thread(mddev->thread); | |
25156198 | 8259 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8260 | did_change = 1; |
f91de92e | 8261 | } |
4ad23a97 N |
8262 | rcu_read_lock(); |
8263 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8264 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8265 | if (mddev->safemode == 1) |
8266 | mddev->safemode = 0; | |
4ad23a97 | 8267 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8268 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8269 | spin_lock(&mddev->lock); |
3d310eb7 N |
8270 | if (mddev->in_sync) { |
8271 | mddev->in_sync = 0; | |
2953079c SL |
8272 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8273 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8274 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8275 | did_change = 1; |
3d310eb7 | 8276 | } |
85572d7c | 8277 | spin_unlock(&mddev->lock); |
06d91a5f | 8278 | } |
4ad23a97 | 8279 | rcu_read_unlock(); |
0fd62b86 | 8280 | if (did_change) |
00bcb4ac | 8281 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8282 | if (!mddev->has_superblocks) |
8283 | return true; | |
09a44cc1 | 8284 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8285 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8286 | mddev->suspended); | |
cc27b0c7 N |
8287 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8288 | percpu_ref_put(&mddev->writes_pending); | |
8289 | return false; | |
8290 | } | |
8291 | return true; | |
1da177e4 | 8292 | } |
6c144d31 | 8293 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8294 | |
49728050 N |
8295 | /* md_write_inc can only be called when md_write_start() has |
8296 | * already been called at least once of the current request. | |
8297 | * It increments the counter and is useful when a single request | |
8298 | * is split into several parts. Each part causes an increment and | |
8299 | * so needs a matching md_write_end(). | |
8300 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8301 | * a spinlocked region. | |
8302 | */ | |
8303 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8304 | { | |
8305 | if (bio_data_dir(bi) != WRITE) | |
8306 | return; | |
8307 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8308 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8309 | } |
8310 | EXPORT_SYMBOL(md_write_inc); | |
8311 | ||
fd01b88c | 8312 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8313 | { |
4ad23a97 N |
8314 | percpu_ref_put(&mddev->writes_pending); |
8315 | ||
8316 | if (mddev->safemode == 2) | |
8317 | md_wakeup_thread(mddev->thread); | |
8318 | else if (mddev->safemode_delay) | |
8319 | /* The roundup() ensures this only performs locking once | |
8320 | * every ->safemode_delay jiffies | |
8321 | */ | |
8322 | mod_timer(&mddev->safemode_timer, | |
8323 | roundup(jiffies, mddev->safemode_delay) + | |
8324 | mddev->safemode_delay); | |
1da177e4 | 8325 | } |
4ad23a97 | 8326 | |
6c144d31 | 8327 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8328 | |
2a2275d6 N |
8329 | /* md_allow_write(mddev) |
8330 | * Calling this ensures that the array is marked 'active' so that writes | |
8331 | * may proceed without blocking. It is important to call this before | |
8332 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8333 | * Must be called with mddev_lock held. | |
8334 | */ | |
2214c260 | 8335 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8336 | { |
8337 | if (!mddev->pers) | |
2214c260 | 8338 | return; |
2a2275d6 | 8339 | if (mddev->ro) |
2214c260 | 8340 | return; |
1a0fd497 | 8341 | if (!mddev->pers->sync_request) |
2214c260 | 8342 | return; |
2a2275d6 | 8343 | |
85572d7c | 8344 | spin_lock(&mddev->lock); |
2a2275d6 N |
8345 | if (mddev->in_sync) { |
8346 | mddev->in_sync = 0; | |
2953079c SL |
8347 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8348 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8349 | if (mddev->safemode_delay && |
8350 | mddev->safemode == 0) | |
8351 | mddev->safemode = 1; | |
85572d7c | 8352 | spin_unlock(&mddev->lock); |
2a2275d6 | 8353 | md_update_sb(mddev, 0); |
00bcb4ac | 8354 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8355 | /* wait for the dirty state to be recorded in the metadata */ |
8356 | wait_event(mddev->sb_wait, | |
2214c260 | 8357 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8358 | } else |
85572d7c | 8359 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8360 | } |
8361 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8362 | ||
1da177e4 LT |
8363 | #define SYNC_MARKS 10 |
8364 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8365 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8366 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8367 | { |
4ed8731d | 8368 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8369 | struct mddev *mddev2; |
e5b521ee | 8370 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8371 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8372 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8373 | unsigned long update_time; |
1da177e4 LT |
8374 | sector_t mark_cnt[SYNC_MARKS]; |
8375 | int last_mark,m; | |
8376 | struct list_head *tmp; | |
8377 | sector_t last_check; | |
57afd89f | 8378 | int skipped = 0; |
3cb03002 | 8379 | struct md_rdev *rdev; |
c4a39551 | 8380 | char *desc, *action = NULL; |
7c2c57c9 | 8381 | struct blk_plug plug; |
41a9a0dc | 8382 | int ret; |
1da177e4 LT |
8383 | |
8384 | /* just incase thread restarts... */ | |
d5d885fd SL |
8385 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8386 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8387 | return; |
3991b31e N |
8388 | if (mddev->ro) {/* never try to sync a read-only array */ |
8389 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8390 | return; |
3991b31e | 8391 | } |
1da177e4 | 8392 | |
41a9a0dc GJ |
8393 | if (mddev_is_clustered(mddev)) { |
8394 | ret = md_cluster_ops->resync_start(mddev); | |
8395 | if (ret) | |
8396 | goto skip; | |
8397 | ||
bb8bf15b | 8398 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8399 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8400 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8401 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8402 | && ((unsigned long long)mddev->curr_resync_completed | |
8403 | < (unsigned long long)mddev->resync_max_sectors)) | |
8404 | goto skip; | |
8405 | } | |
8406 | ||
61df9d91 | 8407 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8408 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8409 | desc = "data-check"; |
c4a39551 JB |
8410 | action = "check"; |
8411 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8412 | desc = "requested-resync"; |
c4a39551 JB |
8413 | action = "repair"; |
8414 | } else | |
61df9d91 N |
8415 | desc = "resync"; |
8416 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8417 | desc = "reshape"; | |
8418 | else | |
8419 | desc = "recovery"; | |
8420 | ||
c4a39551 JB |
8421 | mddev->last_sync_action = action ?: desc; |
8422 | ||
1da177e4 LT |
8423 | /* we overload curr_resync somewhat here. |
8424 | * 0 == not engaged in resync at all | |
8425 | * 2 == checking that there is no conflict with another sync | |
8426 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8427 | * commence |
1da177e4 LT |
8428 | * other == active in resync - this many blocks |
8429 | * | |
8430 | * Before starting a resync we must have set curr_resync to | |
8431 | * 2, and then checked that every "conflicting" array has curr_resync | |
8432 | * less than ours. When we find one that is the same or higher | |
8433 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8434 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8435 | * This will mean we have to start checking from the beginning again. | |
8436 | * | |
8437 | */ | |
8438 | ||
8439 | do { | |
c622ca54 | 8440 | int mddev2_minor = -1; |
1da177e4 LT |
8441 | mddev->curr_resync = 2; |
8442 | ||
8443 | try_again: | |
404e4b43 | 8444 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8445 | goto skip; |
29ac4aa3 | 8446 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8447 | if (mddev2 == mddev) |
8448 | continue; | |
90b08710 BS |
8449 | if (!mddev->parallel_resync |
8450 | && mddev2->curr_resync | |
8451 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8452 | DEFINE_WAIT(wq); |
8453 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8454 | /* arbitrarily yield */ | |
8455 | mddev->curr_resync = 1; | |
8456 | wake_up(&resync_wait); | |
8457 | } | |
8458 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8459 | /* no need to wait here, we can wait the next | |
8460 | * time 'round when curr_resync == 2 | |
8461 | */ | |
8462 | continue; | |
9744197c N |
8463 | /* We need to wait 'interruptible' so as not to |
8464 | * contribute to the load average, and not to | |
8465 | * be caught by 'softlockup' | |
8466 | */ | |
8467 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8468 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8469 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8470 | if (mddev2_minor != mddev2->md_minor) { |
8471 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8472 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8473 | desc, mdname(mddev), | |
8474 | mdname(mddev2)); | |
c622ca54 | 8475 | } |
1da177e4 | 8476 | mddev_put(mddev2); |
9744197c N |
8477 | if (signal_pending(current)) |
8478 | flush_signals(current); | |
1da177e4 LT |
8479 | schedule(); |
8480 | finish_wait(&resync_wait, &wq); | |
8481 | goto try_again; | |
8482 | } | |
8483 | finish_wait(&resync_wait, &wq); | |
8484 | } | |
8485 | } | |
8486 | } while (mddev->curr_resync < 2); | |
8487 | ||
5fd6c1dc | 8488 | j = 0; |
9d88883e | 8489 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8490 | /* resync follows the size requested by the personality, |
57afd89f | 8491 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8492 | */ |
8493 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8494 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8495 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8496 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8497 | j = mddev->resync_min; | |
8498 | else if (!mddev->bitmap) | |
5fd6c1dc | 8499 | j = mddev->recovery_cp; |
5e96ee65 | 8500 | |
cb9ee154 | 8501 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8502 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8503 | /* |
8504 | * If the original node aborts reshaping then we continue the | |
8505 | * reshaping, so set j again to avoid restart reshape from the | |
8506 | * first beginning | |
8507 | */ | |
8508 | if (mddev_is_clustered(mddev) && | |
8509 | mddev->reshape_position != MaxSector) | |
8510 | j = mddev->reshape_position; | |
8511 | } else { | |
1da177e4 | 8512 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8513 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8514 | j = MaxSector; |
4e59ca7d | 8515 | rcu_read_lock(); |
dafb20fa | 8516 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8517 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8518 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8519 | !test_bit(Faulty, &rdev->flags) && |
8520 | !test_bit(In_sync, &rdev->flags) && | |
8521 | rdev->recovery_offset < j) | |
8522 | j = rdev->recovery_offset; | |
4e59ca7d | 8523 | rcu_read_unlock(); |
133d4527 N |
8524 | |
8525 | /* If there is a bitmap, we need to make sure all | |
8526 | * writes that started before we added a spare | |
8527 | * complete before we start doing a recovery. | |
8528 | * Otherwise the write might complete and (via | |
8529 | * bitmap_endwrite) set a bit in the bitmap after the | |
8530 | * recovery has checked that bit and skipped that | |
8531 | * region. | |
8532 | */ | |
8533 | if (mddev->bitmap) { | |
8534 | mddev->pers->quiesce(mddev, 1); | |
8535 | mddev->pers->quiesce(mddev, 0); | |
8536 | } | |
5fd6c1dc | 8537 | } |
1da177e4 | 8538 | |
9d48739e N |
8539 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8540 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8541 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8542 | speed_max(mddev), desc); | |
1da177e4 | 8543 | |
eea1bf38 | 8544 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8545 | |
57afd89f | 8546 | io_sectors = 0; |
1da177e4 LT |
8547 | for (m = 0; m < SYNC_MARKS; m++) { |
8548 | mark[m] = jiffies; | |
57afd89f | 8549 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8550 | } |
8551 | last_mark = 0; | |
8552 | mddev->resync_mark = mark[last_mark]; | |
8553 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8554 | ||
8555 | /* | |
8556 | * Tune reconstruction: | |
8557 | */ | |
e5b521ee | 8558 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8559 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8560 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8561 | |
8562 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8563 | last_check = 0; |
8564 | ||
8565 | if (j>2) { | |
9d48739e N |
8566 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8567 | desc, mdname(mddev)); | |
1da177e4 | 8568 | mddev->curr_resync = j; |
72f36d59 N |
8569 | } else |
8570 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8571 | mddev->curr_resync_completed = j; |
72f36d59 N |
8572 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8573 | md_new_event(mddev); | |
54f89341 | 8574 | update_time = jiffies; |
1da177e4 | 8575 | |
7c2c57c9 | 8576 | blk_start_plug(&plug); |
1da177e4 | 8577 | while (j < max_sectors) { |
57afd89f | 8578 | sector_t sectors; |
1da177e4 | 8579 | |
57afd89f | 8580 | skipped = 0; |
97e4f42d | 8581 | |
7a91ee1f N |
8582 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8583 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8584 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8585 | > (max_sectors >> 4)) || | |
54f89341 | 8586 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8587 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8588 | >= mddev->resync_max - mddev->curr_resync_completed || |
8589 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8590 | )) { |
97e4f42d | 8591 | /* time to update curr_resync_completed */ |
97e4f42d N |
8592 | wait_event(mddev->recovery_wait, |
8593 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8594 | mddev->curr_resync_completed = j; |
35d78c66 | 8595 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8596 | j > mddev->recovery_cp) | |
8597 | mddev->recovery_cp = j; | |
54f89341 | 8598 | update_time = jiffies; |
2953079c | 8599 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8600 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8601 | } |
acb180b0 | 8602 | |
c91abf5a N |
8603 | while (j >= mddev->resync_max && |
8604 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8605 | /* As this condition is controlled by user-space, |
8606 | * we can block indefinitely, so use '_interruptible' | |
8607 | * to avoid triggering warnings. | |
8608 | */ | |
8609 | flush_signals(current); /* just in case */ | |
8610 | wait_event_interruptible(mddev->recovery_wait, | |
8611 | mddev->resync_max > j | |
c91abf5a N |
8612 | || test_bit(MD_RECOVERY_INTR, |
8613 | &mddev->recovery)); | |
e62e58a5 | 8614 | } |
acb180b0 | 8615 | |
c91abf5a N |
8616 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8617 | break; | |
acb180b0 | 8618 | |
09314799 | 8619 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8620 | if (sectors == 0) { |
dfc70645 | 8621 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8622 | break; |
1da177e4 | 8623 | } |
57afd89f N |
8624 | |
8625 | if (!skipped) { /* actual IO requested */ | |
8626 | io_sectors += sectors; | |
8627 | atomic_add(sectors, &mddev->recovery_active); | |
8628 | } | |
8629 | ||
e875ecea N |
8630 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8631 | break; | |
8632 | ||
1da177e4 | 8633 | j += sectors; |
5ed1df2e N |
8634 | if (j > max_sectors) |
8635 | /* when skipping, extra large numbers can be returned. */ | |
8636 | j = max_sectors; | |
72f36d59 N |
8637 | if (j > 2) |
8638 | mddev->curr_resync = j; | |
ff4e8d9a | 8639 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8640 | if (last_check == 0) |
e875ecea | 8641 | /* this is the earliest that rebuild will be |
d7603b7e N |
8642 | * visible in /proc/mdstat |
8643 | */ | |
8644 | md_new_event(mddev); | |
57afd89f N |
8645 | |
8646 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8647 | continue; |
8648 | ||
57afd89f | 8649 | last_check = io_sectors; |
1da177e4 LT |
8650 | repeat: |
8651 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8652 | /* step marks */ | |
8653 | int next = (last_mark+1) % SYNC_MARKS; | |
8654 | ||
8655 | mddev->resync_mark = mark[next]; | |
8656 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8657 | mark[next] = jiffies; | |
57afd89f | 8658 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8659 | last_mark = next; |
8660 | } | |
8661 | ||
c91abf5a N |
8662 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8663 | break; | |
1da177e4 LT |
8664 | |
8665 | /* | |
8666 | * this loop exits only if either when we are slower than | |
8667 | * the 'hard' speed limit, or the system was IO-idle for | |
8668 | * a jiffy. | |
8669 | * the system might be non-idle CPU-wise, but we only care | |
8670 | * about not overloading the IO subsystem. (things like an | |
8671 | * e2fsck being done on the RAID array should execute fast) | |
8672 | */ | |
1da177e4 LT |
8673 | cond_resched(); |
8674 | ||
ac7e50a3 XN |
8675 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8676 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8677 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8678 | |
88202a0c | 8679 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8680 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8681 | msleep(500); |
1da177e4 LT |
8682 | goto repeat; |
8683 | } | |
ac8fa419 N |
8684 | if (!is_mddev_idle(mddev, 0)) { |
8685 | /* | |
8686 | * Give other IO more of a chance. | |
8687 | * The faster the devices, the less we wait. | |
8688 | */ | |
8689 | wait_event(mddev->recovery_wait, | |
8690 | !atomic_read(&mddev->recovery_active)); | |
8691 | } | |
1da177e4 LT |
8692 | } |
8693 | } | |
9d48739e N |
8694 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8695 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8696 | ? "interrupted" : "done"); | |
1da177e4 LT |
8697 | /* |
8698 | * this also signals 'finished resyncing' to md_stop | |
8699 | */ | |
7c2c57c9 | 8700 | blk_finish_plug(&plug); |
1da177e4 LT |
8701 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8702 | ||
5ed1df2e N |
8703 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8704 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8705 | mddev->curr_resync > 3) { |
5ed1df2e N |
8706 | mddev->curr_resync_completed = mddev->curr_resync; |
8707 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8708 | } | |
09314799 | 8709 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8710 | |
dfc70645 | 8711 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8712 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8713 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8714 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8715 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8716 | pr_debug("md: checkpointing %s of %s.\n", |
8717 | desc, mdname(mddev)); | |
0a19caab | 8718 | if (test_bit(MD_RECOVERY_ERROR, |
8719 | &mddev->recovery)) | |
8720 | mddev->recovery_cp = | |
8721 | mddev->curr_resync_completed; | |
8722 | else | |
8723 | mddev->recovery_cp = | |
8724 | mddev->curr_resync; | |
5fd6c1dc N |
8725 | } |
8726 | } else | |
8727 | mddev->recovery_cp = MaxSector; | |
8728 | } else { | |
8729 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8730 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8731 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8732 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8733 | rcu_read_lock(); | |
8734 | rdev_for_each_rcu(rdev, mddev) | |
8735 | if (rdev->raid_disk >= 0 && | |
8736 | mddev->delta_disks >= 0 && | |
8737 | !test_bit(Journal, &rdev->flags) && | |
8738 | !test_bit(Faulty, &rdev->flags) && | |
8739 | !test_bit(In_sync, &rdev->flags) && | |
8740 | rdev->recovery_offset < mddev->curr_resync) | |
8741 | rdev->recovery_offset = mddev->curr_resync; | |
8742 | rcu_read_unlock(); | |
8743 | } | |
5fd6c1dc | 8744 | } |
1da177e4 | 8745 | } |
db91ff55 | 8746 | skip: |
bb8bf15b GJ |
8747 | /* set CHANGE_PENDING here since maybe another update is needed, |
8748 | * so other nodes are informed. It should be harmless for normal | |
8749 | * raid */ | |
2953079c SL |
8750 | set_mask_bits(&mddev->sb_flags, 0, |
8751 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8752 | |
8876391e BC |
8753 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8754 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8755 | mddev->delta_disks > 0 && | |
8756 | mddev->pers->finish_reshape && | |
8757 | mddev->pers->size && | |
8758 | mddev->queue) { | |
8759 | mddev_lock_nointr(mddev); | |
8760 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
8761 | mddev_unlock(mddev); | |
aefb2e5f GJ |
8762 | if (!mddev_is_clustered(mddev)) { |
8763 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
8764 | revalidate_disk(mddev->gendisk); | |
8765 | } | |
8876391e BC |
8766 | } |
8767 | ||
23da422b | 8768 | spin_lock(&mddev->lock); |
c07b70ad N |
8769 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8770 | /* We completed so min/max setting can be forgotten if used. */ | |
8771 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8772 | mddev->resync_min = 0; | |
8773 | mddev->resync_max = MaxSector; | |
8774 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8775 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8776 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8777 | mddev->curr_resync = 0; |
23da422b N |
8778 | spin_unlock(&mddev->lock); |
8779 | ||
1da177e4 | 8780 | wake_up(&resync_wait); |
1da177e4 | 8781 | md_wakeup_thread(mddev->thread); |
c6207277 | 8782 | return; |
1da177e4 | 8783 | } |
29269553 | 8784 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8785 | |
746d3207 N |
8786 | static int remove_and_add_spares(struct mddev *mddev, |
8787 | struct md_rdev *this) | |
b4c4c7b8 | 8788 | { |
3cb03002 | 8789 | struct md_rdev *rdev; |
b4c4c7b8 | 8790 | int spares = 0; |
f2a371c5 | 8791 | int removed = 0; |
d787be40 | 8792 | bool remove_some = false; |
b4c4c7b8 | 8793 | |
39772f0a N |
8794 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
8795 | /* Mustn't remove devices when resync thread is running */ | |
8796 | return 0; | |
8797 | ||
d787be40 N |
8798 | rdev_for_each(rdev, mddev) { |
8799 | if ((this == NULL || rdev == this) && | |
8800 | rdev->raid_disk >= 0 && | |
8801 | !test_bit(Blocked, &rdev->flags) && | |
8802 | test_bit(Faulty, &rdev->flags) && | |
8803 | atomic_read(&rdev->nr_pending)==0) { | |
8804 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8805 | * never get nr_pending incremented, | |
8806 | * never get Faulty cleared, and never get Blocked set. | |
8807 | * So we can synchronize_rcu now rather than once per device | |
8808 | */ | |
8809 | remove_some = true; | |
8810 | set_bit(RemoveSynchronized, &rdev->flags); | |
8811 | } | |
8812 | } | |
8813 | ||
8814 | if (remove_some) | |
8815 | synchronize_rcu(); | |
8816 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8817 | if ((this == NULL || rdev == this) && |
8818 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8819 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8820 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8821 | (!test_bit(In_sync, &rdev->flags) && |
8822 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8823 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8824 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8825 | mddev, rdev) == 0) { |
36fad858 | 8826 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 8827 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 8828 | rdev->raid_disk = -1; |
f2a371c5 | 8829 | removed++; |
b4c4c7b8 N |
8830 | } |
8831 | } | |
d787be40 N |
8832 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8833 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8834 | } | |
8835 | ||
90584fc9 JB |
8836 | if (removed && mddev->kobj.sd) |
8837 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8838 | |
2910ff17 | 8839 | if (this && removed) |
746d3207 N |
8840 | goto no_add; |
8841 | ||
dafb20fa | 8842 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8843 | if (this && this != rdev) |
8844 | continue; | |
dbb64f86 GR |
8845 | if (test_bit(Candidate, &rdev->flags)) |
8846 | continue; | |
7bfec5f3 N |
8847 | if (rdev->raid_disk >= 0 && |
8848 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8849 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8850 | !test_bit(Faulty, &rdev->flags)) |
8851 | spares++; | |
7ceb17e8 N |
8852 | if (rdev->raid_disk >= 0) |
8853 | continue; | |
8854 | if (test_bit(Faulty, &rdev->flags)) | |
8855 | continue; | |
f6b6ec5c SL |
8856 | if (!test_bit(Journal, &rdev->flags)) { |
8857 | if (mddev->ro && | |
8858 | ! (rdev->saved_raid_disk >= 0 && | |
8859 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8860 | continue; | |
7ceb17e8 | 8861 | |
f6b6ec5c SL |
8862 | rdev->recovery_offset = 0; |
8863 | } | |
7ceb17e8 N |
8864 | if (mddev->pers-> |
8865 | hot_add_disk(mddev, rdev) == 0) { | |
8866 | if (sysfs_link_rdev(mddev, rdev)) | |
8867 | /* failure here is OK */; | |
f6b6ec5c SL |
8868 | if (!test_bit(Journal, &rdev->flags)) |
8869 | spares++; | |
7ceb17e8 | 8870 | md_new_event(mddev); |
2953079c | 8871 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8872 | } |
b4c4c7b8 | 8873 | } |
746d3207 | 8874 | no_add: |
6dafab6b | 8875 | if (removed) |
2953079c | 8876 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8877 | return spares; |
8878 | } | |
7ebc0be7 | 8879 | |
ac05f256 N |
8880 | static void md_start_sync(struct work_struct *ws) |
8881 | { | |
8882 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8883 | |
ac05f256 N |
8884 | mddev->sync_thread = md_register_thread(md_do_sync, |
8885 | mddev, | |
8886 | "resync"); | |
8887 | if (!mddev->sync_thread) { | |
9d48739e N |
8888 | pr_warn("%s: could not start resync thread...\n", |
8889 | mdname(mddev)); | |
ac05f256 N |
8890 | /* leave the spares where they are, it shouldn't hurt */ |
8891 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8892 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8893 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8894 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8895 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8896 | wake_up(&resync_wait); |
ac05f256 N |
8897 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8898 | &mddev->recovery)) | |
8899 | if (mddev->sysfs_action) | |
8900 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8901 | } else | |
8902 | md_wakeup_thread(mddev->sync_thread); | |
8903 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8904 | md_new_event(mddev); | |
8905 | } | |
8906 | ||
1da177e4 LT |
8907 | /* |
8908 | * This routine is regularly called by all per-raid-array threads to | |
8909 | * deal with generic issues like resync and super-block update. | |
8910 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8911 | * need this as they never do any recovery or update the superblock. | |
8912 | * | |
8913 | * It does not do any resync itself, but rather "forks" off other threads | |
8914 | * to do that as needed. | |
8915 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8916 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8917 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8918 | * and wakeups up this thread which will reap the thread and finish up. |
8919 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8920 | * | |
8921 | * The overall approach is: | |
8922 | * 1/ if the superblock needs updating, update it. | |
8923 | * 2/ If a recovery thread is running, don't do anything else. | |
8924 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8925 | * 4/ If there are any faulty devices, remove them. | |
8926 | * 5/ If array is degraded, try to add spares devices | |
8927 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8928 | */ | |
fd01b88c | 8929 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8930 | { |
059421e0 N |
8931 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
8932 | /* Write superblock - thread that called mddev_suspend() | |
8933 | * holds reconfig_mutex for us. | |
8934 | */ | |
8935 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
8936 | smp_mb__after_atomic(); | |
8937 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
8938 | md_update_sb(mddev, 0); | |
8939 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
8940 | wake_up(&mddev->sb_wait); | |
8941 | } | |
8942 | ||
68866e42 JB |
8943 | if (mddev->suspended) |
8944 | return; | |
8945 | ||
5f40402d | 8946 | if (mddev->bitmap) |
e64e4018 | 8947 | md_bitmap_daemon_work(mddev); |
1da177e4 | 8948 | |
fca4d848 | 8949 | if (signal_pending(current)) { |
31a59e34 | 8950 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8951 | pr_debug("md: %s in immediate safe mode\n", |
8952 | mdname(mddev)); | |
fca4d848 N |
8953 | mddev->safemode = 2; |
8954 | } | |
8955 | flush_signals(current); | |
8956 | } | |
8957 | ||
c89a8eee N |
8958 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8959 | return; | |
1da177e4 | 8960 | if ( ! ( |
2953079c | 8961 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8962 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8963 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 8964 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 8965 | (mddev->safemode == 2 |
fca4d848 | 8966 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
8967 | )) |
8968 | return; | |
fca4d848 | 8969 | |
df5b89b3 | 8970 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8971 | int spares = 0; |
480523fe | 8972 | bool try_set_sync = mddev->safemode != 0; |
fca4d848 | 8973 | |
afc1f55c | 8974 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
8975 | mddev->safemode = 0; |
8976 | ||
c89a8eee | 8977 | if (mddev->ro) { |
ab16bfc7 NB |
8978 | struct md_rdev *rdev; |
8979 | if (!mddev->external && mddev->in_sync) | |
8980 | /* 'Blocked' flag not needed as failed devices | |
8981 | * will be recorded if array switched to read/write. | |
8982 | * Leaving it set will prevent the device | |
8983 | * from being removed. | |
8984 | */ | |
8985 | rdev_for_each(rdev, mddev) | |
8986 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8987 | /* On a read-only array we can: |
8988 | * - remove failed devices | |
8989 | * - add already-in_sync devices if the array itself | |
8990 | * is in-sync. | |
8991 | * As we only add devices that are already in-sync, | |
8992 | * we can activate the spares immediately. | |
c89a8eee | 8993 | */ |
7ceb17e8 | 8994 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8995 | /* There is no thread, but we need to call |
8996 | * ->spare_active and clear saved_raid_disk | |
8997 | */ | |
2ac295a5 | 8998 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8999 | md_reap_sync_thread(mddev); |
a4a3d26d | 9000 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 9001 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 9002 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
9003 | goto unlock; |
9004 | } | |
9005 | ||
659b254f GJ |
9006 | if (mddev_is_clustered(mddev)) { |
9007 | struct md_rdev *rdev; | |
9008 | /* kick the device if another node issued a | |
9009 | * remove disk. | |
9010 | */ | |
9011 | rdev_for_each(rdev, mddev) { | |
9012 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
9013 | rdev->raid_disk < 0) | |
9014 | md_kick_rdev_from_array(rdev); | |
9015 | } | |
9016 | } | |
9017 | ||
480523fe | 9018 | if (try_set_sync && !mddev->external && !mddev->in_sync) { |
85572d7c | 9019 | spin_lock(&mddev->lock); |
6497709b | 9020 | set_in_sync(mddev); |
85572d7c | 9021 | spin_unlock(&mddev->lock); |
fca4d848 | 9022 | } |
fca4d848 | 9023 | |
2953079c | 9024 | if (mddev->sb_flags) |
850b2b42 | 9025 | md_update_sb(mddev, 0); |
06d91a5f | 9026 | |
1da177e4 LT |
9027 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
9028 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
9029 | /* resync/recovery still happening */ | |
9030 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9031 | goto unlock; | |
9032 | } | |
9033 | if (mddev->sync_thread) { | |
a91d5ac0 | 9034 | md_reap_sync_thread(mddev); |
1da177e4 LT |
9035 | goto unlock; |
9036 | } | |
72a23c21 NB |
9037 | /* Set RUNNING before clearing NEEDED to avoid |
9038 | * any transients in the value of "sync_action". | |
9039 | */ | |
72f36d59 | 9040 | mddev->curr_resync_completed = 0; |
23da422b | 9041 | spin_lock(&mddev->lock); |
72a23c21 | 9042 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 9043 | spin_unlock(&mddev->lock); |
24dd469d N |
9044 | /* Clear some bits that don't mean anything, but |
9045 | * might be left set | |
9046 | */ | |
24dd469d N |
9047 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9048 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9049 | |
ed209584 N |
9050 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9051 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9052 | goto not_running; |
1da177e4 LT |
9053 | /* no recovery is running. |
9054 | * remove any failed drives, then | |
9055 | * add spares if possible. | |
72f36d59 | 9056 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9057 | * the personality to fail the re-add. |
9058 | */ | |
1da177e4 | 9059 | |
b4c4c7b8 | 9060 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9061 | if (mddev->pers->check_reshape == NULL || |
9062 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9063 | /* Cannot proceed */ |
ac05f256 | 9064 | goto not_running; |
b4c4c7b8 | 9065 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9066 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9067 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9068 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9069 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9070 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9071 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9072 | } else if (mddev->recovery_cp < MaxSector) { |
9073 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9074 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9075 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9076 | /* nothing to be done ... */ | |
ac05f256 | 9077 | goto not_running; |
24dd469d | 9078 | |
1da177e4 | 9079 | if (mddev->pers->sync_request) { |
ef99bf48 | 9080 | if (spares) { |
a654b9d8 N |
9081 | /* We are adding a device or devices to an array |
9082 | * which has the bitmap stored on all devices. | |
9083 | * So make sure all bitmap pages get written | |
9084 | */ | |
e64e4018 | 9085 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9086 | } |
ac05f256 N |
9087 | INIT_WORK(&mddev->del_work, md_start_sync); |
9088 | queue_work(md_misc_wq, &mddev->del_work); | |
9089 | goto unlock; | |
1da177e4 | 9090 | } |
ac05f256 | 9091 | not_running: |
72a23c21 NB |
9092 | if (!mddev->sync_thread) { |
9093 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9094 | wake_up(&resync_wait); |
72a23c21 NB |
9095 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9096 | &mddev->recovery)) | |
0c3573f1 | 9097 | if (mddev->sysfs_action) |
00bcb4ac | 9098 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9099 | } |
ac05f256 N |
9100 | unlock: |
9101 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9102 | mddev_unlock(mddev); |
9103 | } | |
9104 | } | |
6c144d31 | 9105 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9106 | |
a91d5ac0 JB |
9107 | void md_reap_sync_thread(struct mddev *mddev) |
9108 | { | |
9109 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9110 | sector_t old_dev_sectors = mddev->dev_sectors; |
9111 | bool is_reshaped = false; | |
a91d5ac0 JB |
9112 | |
9113 | /* resync has finished, collect result */ | |
9114 | md_unregister_thread(&mddev->sync_thread); | |
9115 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
0d8ed0e9 GJ |
9116 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) && |
9117 | mddev->degraded != mddev->raid_disks) { | |
a91d5ac0 JB |
9118 | /* success...*/ |
9119 | /* activate any spares */ | |
9120 | if (mddev->pers->spare_active(mddev)) { | |
9121 | sysfs_notify(&mddev->kobj, NULL, | |
9122 | "degraded"); | |
2953079c | 9123 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9124 | } |
9125 | } | |
9126 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9127 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9128 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9129 | if (mddev_is_clustered(mddev)) |
9130 | is_reshaped = true; | |
9131 | } | |
a91d5ac0 JB |
9132 | |
9133 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9134 | * information must be scrapped. |
a91d5ac0 | 9135 | */ |
f466722c N |
9136 | if (!mddev->degraded) |
9137 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9138 | rdev->saved_raid_disk = -1; |
9139 | ||
9140 | md_update_sb(mddev, 1); | |
2953079c | 9141 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9142 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9143 | * clustered raid */ | |
9144 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9145 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9146 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9147 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9148 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9149 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9150 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9151 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9152 | /* |
9153 | * We call md_cluster_ops->update_size here because sync_size could | |
9154 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9155 | * so it is time to update size across cluster. | |
9156 | */ | |
9157 | if (mddev_is_clustered(mddev) && is_reshaped | |
9158 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9159 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9160 | wake_up(&resync_wait); |
a91d5ac0 JB |
9161 | /* flag recovery needed just to double check */ |
9162 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9163 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9164 | md_new_event(mddev); | |
9165 | if (mddev->event_work.func) | |
9166 | queue_work(md_misc_wq, &mddev->event_work); | |
9167 | } | |
6c144d31 | 9168 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9169 | |
fd01b88c | 9170 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9171 | { |
00bcb4ac | 9172 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9173 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9174 | !test_bit(Blocked, &rdev->flags) && |
9175 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9176 | msecs_to_jiffies(5000)); |
9177 | rdev_dec_pending(rdev, mddev); | |
9178 | } | |
9179 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9180 | ||
c6563a8c N |
9181 | void md_finish_reshape(struct mddev *mddev) |
9182 | { | |
9183 | /* called be personality module when reshape completes. */ | |
9184 | struct md_rdev *rdev; | |
9185 | ||
9186 | rdev_for_each(rdev, mddev) { | |
9187 | if (rdev->data_offset > rdev->new_data_offset) | |
9188 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9189 | else | |
9190 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9191 | rdev->data_offset = rdev->new_data_offset; | |
9192 | } | |
9193 | } | |
9194 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9195 | |
fc974ee2 | 9196 | /* Bad block management */ |
2230dfe4 | 9197 | |
fc974ee2 | 9198 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9199 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9200 | int is_new) |
2230dfe4 | 9201 | { |
85ad1d13 | 9202 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9203 | int rv; |
9204 | if (is_new) | |
9205 | s += rdev->new_data_offset; | |
9206 | else | |
9207 | s += rdev->data_offset; | |
fc974ee2 VV |
9208 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9209 | if (rv == 0) { | |
2230dfe4 | 9210 | /* Make sure they get written out promptly */ |
35b785f7 TM |
9211 | if (test_bit(ExternalBbl, &rdev->flags)) |
9212 | sysfs_notify(&rdev->kobj, NULL, | |
9213 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 9214 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9215 | set_mask_bits(&mddev->sb_flags, 0, |
9216 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9217 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9218 | return 1; |
9219 | } else | |
9220 | return 0; | |
2230dfe4 N |
9221 | } |
9222 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9223 | ||
c6563a8c N |
9224 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9225 | int is_new) | |
2230dfe4 | 9226 | { |
35b785f7 | 9227 | int rv; |
c6563a8c N |
9228 | if (is_new) |
9229 | s += rdev->new_data_offset; | |
9230 | else | |
9231 | s += rdev->data_offset; | |
35b785f7 TM |
9232 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9233 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
9234 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
9235 | return rv; | |
2230dfe4 N |
9236 | } |
9237 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9238 | ||
75c96f85 AB |
9239 | static int md_notify_reboot(struct notifier_block *this, |
9240 | unsigned long code, void *x) | |
1da177e4 LT |
9241 | { |
9242 | struct list_head *tmp; | |
fd01b88c | 9243 | struct mddev *mddev; |
2dba6a91 | 9244 | int need_delay = 0; |
1da177e4 | 9245 | |
c744a65c N |
9246 | for_each_mddev(mddev, tmp) { |
9247 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9248 | if (mddev->pers) |
9249 | __md_stop_writes(mddev); | |
0f62fb22 N |
9250 | if (mddev->persistent) |
9251 | mddev->safemode = 2; | |
c744a65c | 9252 | mddev_unlock(mddev); |
2dba6a91 | 9253 | } |
c744a65c | 9254 | need_delay = 1; |
1da177e4 | 9255 | } |
c744a65c N |
9256 | /* |
9257 | * certain more exotic SCSI devices are known to be | |
9258 | * volatile wrt too early system reboots. While the | |
9259 | * right place to handle this issue is the given | |
9260 | * driver, we do want to have a safe RAID driver ... | |
9261 | */ | |
9262 | if (need_delay) | |
9263 | mdelay(1000*1); | |
9264 | ||
1da177e4 LT |
9265 | return NOTIFY_DONE; |
9266 | } | |
9267 | ||
75c96f85 | 9268 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9269 | .notifier_call = md_notify_reboot, |
9270 | .next = NULL, | |
9271 | .priority = INT_MAX, /* before any real devices */ | |
9272 | }; | |
9273 | ||
9274 | static void md_geninit(void) | |
9275 | { | |
36a4e1fe | 9276 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9277 | |
c7705f34 | 9278 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
9279 | } |
9280 | ||
75c96f85 | 9281 | static int __init md_init(void) |
1da177e4 | 9282 | { |
e804ac78 TH |
9283 | int ret = -ENOMEM; |
9284 | ||
ada609ee | 9285 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9286 | if (!md_wq) |
9287 | goto err_wq; | |
9288 | ||
9289 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9290 | if (!md_misc_wq) | |
9291 | goto err_misc_wq; | |
9292 | ||
9293 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
9294 | goto err_md; | |
9295 | ||
9296 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9297 | goto err_mdp; | |
9298 | mdp_major = ret; | |
9299 | ||
af5628f0 | 9300 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9301 | md_probe, NULL, NULL); |
9302 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9303 | md_probe, NULL, NULL); |
9304 | ||
1da177e4 | 9305 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9306 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9307 | |
9308 | md_geninit(); | |
d710e138 | 9309 | return 0; |
1da177e4 | 9310 | |
e804ac78 TH |
9311 | err_mdp: |
9312 | unregister_blkdev(MD_MAJOR, "md"); | |
9313 | err_md: | |
9314 | destroy_workqueue(md_misc_wq); | |
9315 | err_misc_wq: | |
9316 | destroy_workqueue(md_wq); | |
9317 | err_wq: | |
9318 | return ret; | |
9319 | } | |
1da177e4 | 9320 | |
70bcecdb | 9321 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9322 | { |
70bcecdb GR |
9323 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9324 | struct md_rdev *rdev2; | |
9325 | int role, ret; | |
9326 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9327 | |
818da59f GJ |
9328 | /* |
9329 | * If size is changed in another node then we need to | |
9330 | * do resize as well. | |
9331 | */ | |
9332 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9333 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9334 | if (ret) | |
9335 | pr_info("md-cluster: resize failed\n"); | |
9336 | else | |
e64e4018 | 9337 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9338 | } |
9339 | ||
70bcecdb GR |
9340 | /* Check for change of roles in the active devices */ |
9341 | rdev_for_each(rdev2, mddev) { | |
9342 | if (test_bit(Faulty, &rdev2->flags)) | |
9343 | continue; | |
9344 | ||
9345 | /* Check if the roles changed */ | |
9346 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9347 | |
9348 | if (test_bit(Candidate, &rdev2->flags)) { | |
9349 | if (role == 0xfffe) { | |
9350 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9351 | md_kick_rdev_from_array(rdev2); | |
9352 | continue; | |
9353 | } | |
9354 | else | |
9355 | clear_bit(Candidate, &rdev2->flags); | |
9356 | } | |
9357 | ||
70bcecdb | 9358 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9359 | /* |
9360 | * got activated except reshape is happening. | |
9361 | */ | |
9362 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9363 | !(le32_to_cpu(sb->feature_map) & | |
9364 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9365 | rdev2->saved_raid_disk = role; |
9366 | ret = remove_and_add_spares(mddev, rdev2); | |
9367 | pr_info("Activated spare: %s\n", | |
9d48739e | 9368 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9369 | /* wakeup mddev->thread here, so array could |
9370 | * perform resync with the new activated disk */ | |
9371 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9372 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9373 | } |
9374 | /* device faulty | |
9375 | * We just want to do the minimum to mark the disk | |
9376 | * as faulty. The recovery is performed by the | |
9377 | * one who initiated the error. | |
9378 | */ | |
9379 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9380 | md_error(mddev, rdev2); | |
9381 | clear_bit(Blocked, &rdev2->flags); | |
9382 | } | |
9383 | } | |
1d7e3e96 | 9384 | } |
70bcecdb | 9385 | |
28c1b9fd GR |
9386 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9387 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9388 | |
7564beda GJ |
9389 | /* |
9390 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9391 | * so it is time to check reshape. | |
9392 | */ | |
9393 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9394 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9395 | /* | |
9396 | * reshape is happening in the remote node, we need to | |
9397 | * update reshape_position and call start_reshape. | |
9398 | */ | |
ed4d0a4e | 9399 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9400 | if (mddev->pers->update_reshape_pos) |
9401 | mddev->pers->update_reshape_pos(mddev); | |
9402 | if (mddev->pers->start_reshape) | |
9403 | mddev->pers->start_reshape(mddev); | |
9404 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9405 | mddev->reshape_position != MaxSector && | |
9406 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9407 | /* reshape is just done in another node. */ | |
9408 | mddev->reshape_position = MaxSector; | |
9409 | if (mddev->pers->update_reshape_pos) | |
9410 | mddev->pers->update_reshape_pos(mddev); | |
9411 | } | |
9412 | ||
70bcecdb GR |
9413 | /* Finally set the event to be up to date */ |
9414 | mddev->events = le64_to_cpu(sb->events); | |
9415 | } | |
9416 | ||
9417 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9418 | { | |
9419 | int err; | |
9420 | struct page *swapout = rdev->sb_page; | |
9421 | struct mdp_superblock_1 *sb; | |
9422 | ||
9423 | /* Store the sb page of the rdev in the swapout temporary | |
9424 | * variable in case we err in the future | |
9425 | */ | |
9426 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9427 | err = alloc_disk_sb(rdev); |
9428 | if (err == 0) { | |
9429 | ClearPageUptodate(rdev->sb_page); | |
9430 | rdev->sb_loaded = 0; | |
9431 | err = super_types[mddev->major_version]. | |
9432 | load_super(rdev, NULL, mddev->minor_version); | |
9433 | } | |
70bcecdb GR |
9434 | if (err < 0) { |
9435 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9436 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9437 | if (rdev->sb_page) |
9438 | put_page(rdev->sb_page); | |
70bcecdb GR |
9439 | rdev->sb_page = swapout; |
9440 | rdev->sb_loaded = 1; | |
9441 | return err; | |
1d7e3e96 GR |
9442 | } |
9443 | ||
70bcecdb GR |
9444 | sb = page_address(rdev->sb_page); |
9445 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9446 | * is not set | |
9447 | */ | |
9448 | ||
9449 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9450 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9451 | ||
9452 | /* The other node finished recovery, call spare_active to set | |
9453 | * device In_sync and mddev->degraded | |
9454 | */ | |
9455 | if (rdev->recovery_offset == MaxSector && | |
9456 | !test_bit(In_sync, &rdev->flags) && | |
9457 | mddev->pers->spare_active(mddev)) | |
9458 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9459 | ||
9460 | put_page(swapout); | |
9461 | return 0; | |
9462 | } | |
9463 | ||
9464 | void md_reload_sb(struct mddev *mddev, int nr) | |
9465 | { | |
9466 | struct md_rdev *rdev; | |
9467 | int err; | |
9468 | ||
9469 | /* Find the rdev */ | |
9470 | rdev_for_each_rcu(rdev, mddev) { | |
9471 | if (rdev->desc_nr == nr) | |
9472 | break; | |
9473 | } | |
9474 | ||
9475 | if (!rdev || rdev->desc_nr != nr) { | |
9476 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9477 | return; | |
9478 | } | |
9479 | ||
9480 | err = read_rdev(mddev, rdev); | |
9481 | if (err < 0) | |
9482 | return; | |
9483 | ||
9484 | check_sb_changes(mddev, rdev); | |
9485 | ||
9486 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9487 | rdev_for_each_rcu(rdev, mddev) { |
9488 | if (!test_bit(Faulty, &rdev->flags)) | |
9489 | read_rdev(mddev, rdev); | |
9490 | } | |
1d7e3e96 GR |
9491 | } |
9492 | EXPORT_SYMBOL(md_reload_sb); | |
9493 | ||
1da177e4 LT |
9494 | #ifndef MODULE |
9495 | ||
9496 | /* | |
9497 | * Searches all registered partitions for autorun RAID arrays | |
9498 | * at boot time. | |
9499 | */ | |
4d936ec1 | 9500 | |
5b1f5bc3 | 9501 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9502 | static LIST_HEAD(all_detected_devices); |
9503 | struct detected_devices_node { | |
9504 | struct list_head list; | |
9505 | dev_t dev; | |
9506 | }; | |
1da177e4 LT |
9507 | |
9508 | void md_autodetect_dev(dev_t dev) | |
9509 | { | |
4d936ec1 ME |
9510 | struct detected_devices_node *node_detected_dev; |
9511 | ||
9512 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9513 | if (node_detected_dev) { | |
9514 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9515 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9516 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9517 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9518 | } |
1da177e4 LT |
9519 | } |
9520 | ||
1da177e4 LT |
9521 | static void autostart_arrays(int part) |
9522 | { | |
3cb03002 | 9523 | struct md_rdev *rdev; |
4d936ec1 ME |
9524 | struct detected_devices_node *node_detected_dev; |
9525 | dev_t dev; | |
9526 | int i_scanned, i_passed; | |
1da177e4 | 9527 | |
4d936ec1 ME |
9528 | i_scanned = 0; |
9529 | i_passed = 0; | |
1da177e4 | 9530 | |
9d48739e | 9531 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9532 | |
5b1f5bc3 | 9533 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9534 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9535 | i_scanned++; | |
9536 | node_detected_dev = list_entry(all_detected_devices.next, | |
9537 | struct detected_devices_node, list); | |
9538 | list_del(&node_detected_dev->list); | |
9539 | dev = node_detected_dev->dev; | |
9540 | kfree(node_detected_dev); | |
90bcf133 | 9541 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9542 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9543 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9544 | if (IS_ERR(rdev)) |
9545 | continue; | |
9546 | ||
403df478 | 9547 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9548 | continue; |
403df478 | 9549 | |
d0fae18f | 9550 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9551 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9552 | i_passed++; |
1da177e4 | 9553 | } |
5b1f5bc3 | 9554 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9555 | |
9d48739e | 9556 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9557 | |
9558 | autorun_devices(part); | |
9559 | } | |
9560 | ||
fdee8ae4 | 9561 | #endif /* !MODULE */ |
1da177e4 LT |
9562 | |
9563 | static __exit void md_exit(void) | |
9564 | { | |
fd01b88c | 9565 | struct mddev *mddev; |
1da177e4 | 9566 | struct list_head *tmp; |
e2f23b60 | 9567 | int delay = 1; |
8ab5e4c1 | 9568 | |
af5628f0 | 9569 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9570 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9571 | |
3dbd8c2e | 9572 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9573 | unregister_blkdev(mdp_major, "mdp"); |
9574 | unregister_reboot_notifier(&md_notifier); | |
9575 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9576 | |
9577 | /* We cannot unload the modules while some process is | |
9578 | * waiting for us in select() or poll() - wake them up | |
9579 | */ | |
9580 | md_unloading = 1; | |
9581 | while (waitqueue_active(&md_event_waiters)) { | |
9582 | /* not safe to leave yet */ | |
9583 | wake_up(&md_event_waiters); | |
9584 | msleep(delay); | |
9585 | delay += delay; | |
9586 | } | |
1da177e4 | 9587 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9588 | |
29ac4aa3 | 9589 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9590 | export_array(mddev); |
9356863c | 9591 | mddev->ctime = 0; |
d3374825 | 9592 | mddev->hold_active = 0; |
9356863c N |
9593 | /* |
9594 | * for_each_mddev() will call mddev_put() at the end of each | |
9595 | * iteration. As the mddev is now fully clear, this will | |
9596 | * schedule the mddev for destruction by a workqueue, and the | |
9597 | * destroy_workqueue() below will wait for that to complete. | |
9598 | */ | |
1da177e4 | 9599 | } |
e804ac78 TH |
9600 | destroy_workqueue(md_misc_wq); |
9601 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9602 | } |
9603 | ||
685784aa | 9604 | subsys_initcall(md_init); |
1da177e4 LT |
9605 | module_exit(md_exit) |
9606 | ||
e4dca7b7 | 9607 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e N |
9608 | { |
9609 | return sprintf(buffer, "%d", start_readonly); | |
9610 | } | |
e4dca7b7 | 9611 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9612 | { |
4c9309c0 | 9613 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9614 | } |
9615 | ||
80ca3a44 N |
9616 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9617 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9618 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9619 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9620 | |
1da177e4 | 9621 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9622 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9623 | MODULE_ALIAS("md"); |
72008652 | 9624 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |