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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 | |
af67c31f | 379 | blk_queue_split(q, &bio); |
54efd50b | 380 | |
274d8cbd | 381 | if (mddev == NULL || mddev->pers == NULL) { |
409c57f3 | 382 | bio_io_error(bio); |
dece1635 | 383 | return BLK_QC_T_NONE; |
409c57f3 | 384 | } |
bbfa57c0 | 385 | if (mddev->ro == 1 && unlikely(rw == WRITE)) { |
4246a0b6 | 386 | if (bio_sectors(bio) != 0) |
4e4cbee9 | 387 | bio->bi_status = BLK_STS_IOERR; |
4246a0b6 | 388 | bio_endio(bio); |
dece1635 | 389 | return BLK_QC_T_NONE; |
bbfa57c0 | 390 | } |
49077326 | 391 | |
e91ece55 CM |
392 | /* |
393 | * save the sectors now since our bio can | |
394 | * go away inside make_request | |
395 | */ | |
396 | sectors = bio_sectors(bio); | |
9c573de3 | 397 | /* bio could be mergeable after passing to underlayer */ |
1eff9d32 | 398 | bio->bi_opf &= ~REQ_NOMERGE; |
393debc2 SL |
399 | |
400 | md_handle_request(mddev, bio); | |
49077326 | 401 | |
112f158f MS |
402 | part_stat_lock(); |
403 | part_stat_inc(&mddev->gendisk->part0, ios[sgrp]); | |
404 | part_stat_add(&mddev->gendisk->part0, sectors[sgrp], sectors); | |
74672d06 | 405 | part_stat_unlock(); |
49077326 | 406 | |
dece1635 | 407 | return BLK_QC_T_NONE; |
409c57f3 N |
408 | } |
409 | ||
9e35b99c N |
410 | /* mddev_suspend makes sure no new requests are submitted |
411 | * to the device, and that any requests that have been submitted | |
412 | * are completely handled. | |
afa0f557 N |
413 | * Once mddev_detach() is called and completes, the module will be |
414 | * completely unused. | |
9e35b99c | 415 | */ |
fd01b88c | 416 | void mddev_suspend(struct mddev *mddev) |
409c57f3 | 417 | { |
092398dc | 418 | WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk); |
4d5324f7 | 419 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
420 | if (mddev->suspended++) |
421 | return; | |
409c57f3 | 422 | synchronize_rcu(); |
cc27b0c7 | 423 | wake_up(&mddev->sb_wait); |
35bfc521 N |
424 | set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags); |
425 | smp_mb__after_atomic(); | |
409c57f3 N |
426 | wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); |
427 | mddev->pers->quiesce(mddev, 1); | |
35bfc521 N |
428 | clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags); |
429 | wait_event(mddev->sb_wait, !test_bit(MD_UPDATING_SB, &mddev->flags)); | |
0d9f4f13 JB |
430 | |
431 | del_timer_sync(&mddev->safemode_timer); | |
409c57f3 | 432 | } |
390ee602 | 433 | EXPORT_SYMBOL_GPL(mddev_suspend); |
409c57f3 | 434 | |
fd01b88c | 435 | void mddev_resume(struct mddev *mddev) |
409c57f3 | 436 | { |
4d5324f7 | 437 | lockdep_assert_held(&mddev->reconfig_mutex); |
0dc10e50 MP |
438 | if (--mddev->suspended) |
439 | return; | |
409c57f3 N |
440 | wake_up(&mddev->sb_wait); |
441 | mddev->pers->quiesce(mddev, 0); | |
0fd018af | 442 | |
47525e59 | 443 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
0fd018af JB |
444 | md_wakeup_thread(mddev->thread); |
445 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
1da177e4 | 446 | } |
390ee602 | 447 | EXPORT_SYMBOL_GPL(mddev_resume); |
1da177e4 | 448 | |
fd01b88c | 449 | int mddev_congested(struct mddev *mddev, int bits) |
3fa841d7 | 450 | { |
5c675f83 N |
451 | struct md_personality *pers = mddev->pers; |
452 | int ret = 0; | |
453 | ||
454 | rcu_read_lock(); | |
455 | if (mddev->suspended) | |
456 | ret = 1; | |
457 | else if (pers && pers->congested) | |
458 | ret = pers->congested(mddev, bits); | |
459 | rcu_read_unlock(); | |
460 | return ret; | |
461 | } | |
462 | EXPORT_SYMBOL_GPL(mddev_congested); | |
463 | static int md_congested(void *data, int bits) | |
464 | { | |
465 | struct mddev *mddev = data; | |
466 | return mddev_congested(mddev, bits); | |
3fa841d7 | 467 | } |
3fa841d7 | 468 | |
a2826aa9 | 469 | /* |
e9c7469b | 470 | * Generic flush handling for md |
a2826aa9 N |
471 | */ |
472 | ||
4bc034d3 | 473 | static void md_end_flush(struct bio *bio) |
a2826aa9 | 474 | { |
4bc034d3 N |
475 | struct md_rdev *rdev = bio->bi_private; |
476 | struct mddev *mddev = rdev->mddev; | |
a2826aa9 N |
477 | |
478 | rdev_dec_pending(rdev, mddev); | |
479 | ||
4bc034d3 N |
480 | if (atomic_dec_and_test(&mddev->flush_pending)) { |
481 | /* The pre-request flush has finished */ | |
482 | queue_work(md_wq, &mddev->flush_work); | |
a2826aa9 | 483 | } |
4bc034d3 | 484 | bio_put(bio); |
5a409b4f | 485 | } |
a7a07e69 | 486 | |
4bc034d3 N |
487 | static void md_submit_flush_data(struct work_struct *ws); |
488 | ||
489 | static void submit_flushes(struct work_struct *ws) | |
a2826aa9 | 490 | { |
4bc034d3 | 491 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); |
3cb03002 | 492 | struct md_rdev *rdev; |
a2826aa9 | 493 | |
2bc13b83 | 494 | mddev->start_flush = ktime_get_boottime(); |
4bc034d3 N |
495 | INIT_WORK(&mddev->flush_work, md_submit_flush_data); |
496 | atomic_set(&mddev->flush_pending, 1); | |
a2826aa9 | 497 | rcu_read_lock(); |
dafb20fa | 498 | rdev_for_each_rcu(rdev, mddev) |
a2826aa9 N |
499 | if (rdev->raid_disk >= 0 && |
500 | !test_bit(Faulty, &rdev->flags)) { | |
501 | /* Take two references, one is dropped | |
502 | * when request finishes, one after | |
503 | * we reclaim rcu_read_lock | |
504 | */ | |
505 | struct bio *bi; | |
506 | atomic_inc(&rdev->nr_pending); | |
507 | atomic_inc(&rdev->nr_pending); | |
508 | rcu_read_unlock(); | |
b5e1b8ce | 509 | bi = bio_alloc_mddev(GFP_NOIO, 0, mddev); |
5a409b4f | 510 | bi->bi_end_io = md_end_flush; |
4bc034d3 N |
511 | bi->bi_private = rdev; |
512 | bio_set_dev(bi, rdev->bdev); | |
70fd7614 | 513 | bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; |
4bc034d3 | 514 | atomic_inc(&mddev->flush_pending); |
4e49ea4a | 515 | submit_bio(bi); |
a2826aa9 N |
516 | rcu_read_lock(); |
517 | rdev_dec_pending(rdev, mddev); | |
518 | } | |
519 | rcu_read_unlock(); | |
4bc034d3 N |
520 | if (atomic_dec_and_test(&mddev->flush_pending)) |
521 | queue_work(md_wq, &mddev->flush_work); | |
522 | } | |
a2826aa9 | 523 | |
4bc034d3 N |
524 | static void md_submit_flush_data(struct work_struct *ws) |
525 | { | |
526 | struct mddev *mddev = container_of(ws, struct mddev, flush_work); | |
527 | struct bio *bio = mddev->flush_bio; | |
528 | ||
529 | /* | |
530 | * must reset flush_bio before calling into md_handle_request to avoid a | |
531 | * deadlock, because other bios passed md_handle_request suspend check | |
532 | * could wait for this and below md_handle_request could wait for those | |
533 | * bios because of suspend check | |
534 | */ | |
2bc13b83 | 535 | mddev->last_flush = mddev->start_flush; |
4bc034d3 N |
536 | mddev->flush_bio = NULL; |
537 | wake_up(&mddev->sb_wait); | |
538 | ||
539 | if (bio->bi_iter.bi_size == 0) { | |
540 | /* an empty barrier - all done */ | |
541 | bio_endio(bio); | |
542 | } else { | |
543 | bio->bi_opf &= ~REQ_PREFLUSH; | |
544 | md_handle_request(mddev, bio); | |
a2826aa9 | 545 | } |
a2826aa9 | 546 | } |
4bc034d3 N |
547 | |
548 | void md_flush_request(struct mddev *mddev, struct bio *bio) | |
549 | { | |
2bc13b83 | 550 | ktime_t start = ktime_get_boottime(); |
4bc034d3 N |
551 | spin_lock_irq(&mddev->lock); |
552 | wait_event_lock_irq(mddev->sb_wait, | |
2bc13b83 N |
553 | !mddev->flush_bio || |
554 | ktime_after(mddev->last_flush, start), | |
4bc034d3 | 555 | mddev->lock); |
2bc13b83 N |
556 | if (!ktime_after(mddev->last_flush, start)) { |
557 | WARN_ON(mddev->flush_bio); | |
558 | mddev->flush_bio = bio; | |
559 | bio = NULL; | |
560 | } | |
4bc034d3 N |
561 | spin_unlock_irq(&mddev->lock); |
562 | ||
2bc13b83 N |
563 | if (!bio) { |
564 | INIT_WORK(&mddev->flush_work, submit_flushes); | |
565 | queue_work(md_wq, &mddev->flush_work); | |
566 | } else { | |
567 | /* flush was performed for some other bio while we waited. */ | |
568 | if (bio->bi_iter.bi_size == 0) | |
569 | /* an empty barrier - all done */ | |
570 | bio_endio(bio); | |
571 | else { | |
572 | bio->bi_opf &= ~REQ_PREFLUSH; | |
573 | mddev->pers->make_request(mddev, bio); | |
574 | } | |
575 | } | |
4bc034d3 | 576 | } |
e9c7469b | 577 | EXPORT_SYMBOL(md_flush_request); |
409c57f3 | 578 | |
fd01b88c | 579 | static inline struct mddev *mddev_get(struct mddev *mddev) |
1da177e4 LT |
580 | { |
581 | atomic_inc(&mddev->active); | |
582 | return mddev; | |
583 | } | |
584 | ||
5fd3a17e | 585 | static void mddev_delayed_delete(struct work_struct *ws); |
d3374825 | 586 | |
fd01b88c | 587 | static void mddev_put(struct mddev *mddev) |
1da177e4 LT |
588 | { |
589 | if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) | |
590 | return; | |
d3374825 | 591 | if (!mddev->raid_disks && list_empty(&mddev->disks) && |
cbd19983 N |
592 | mddev->ctime == 0 && !mddev->hold_active) { |
593 | /* Array is not configured at all, and not held active, | |
594 | * so destroy it */ | |
af8a2434 | 595 | list_del_init(&mddev->all_mddevs); |
28dec870 KO |
596 | |
597 | /* | |
598 | * Call queue_work inside the spinlock so that | |
599 | * flush_workqueue() after mddev_find will succeed in waiting | |
600 | * for the work to be done. | |
601 | */ | |
602 | INIT_WORK(&mddev->del_work, mddev_delayed_delete); | |
603 | queue_work(md_misc_wq, &mddev->del_work); | |
d3374825 N |
604 | } |
605 | spin_unlock(&all_mddevs_lock); | |
1da177e4 LT |
606 | } |
607 | ||
8376d3c1 | 608 | static void md_safemode_timeout(struct timer_list *t); |
25b2edfa | 609 | |
fd01b88c | 610 | void mddev_init(struct mddev *mddev) |
fafd7fb0 | 611 | { |
28dec870 | 612 | kobject_init(&mddev->kobj, &md_ktype); |
fafd7fb0 N |
613 | mutex_init(&mddev->open_mutex); |
614 | mutex_init(&mddev->reconfig_mutex); | |
615 | mutex_init(&mddev->bitmap_info.mutex); | |
616 | INIT_LIST_HEAD(&mddev->disks); | |
617 | INIT_LIST_HEAD(&mddev->all_mddevs); | |
8376d3c1 | 618 | timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0); |
fafd7fb0 N |
619 | atomic_set(&mddev->active, 1); |
620 | atomic_set(&mddev->openers, 0); | |
621 | atomic_set(&mddev->active_io, 0); | |
85572d7c | 622 | spin_lock_init(&mddev->lock); |
4bc034d3 | 623 | atomic_set(&mddev->flush_pending, 0); |
fafd7fb0 N |
624 | init_waitqueue_head(&mddev->sb_wait); |
625 | init_waitqueue_head(&mddev->recovery_wait); | |
626 | mddev->reshape_position = MaxSector; | |
2c810cdd | 627 | mddev->reshape_backwards = 0; |
c4a39551 | 628 | mddev->last_sync_action = "none"; |
fafd7fb0 N |
629 | mddev->resync_min = 0; |
630 | mddev->resync_max = MaxSector; | |
631 | mddev->level = LEVEL_NONE; | |
632 | } | |
390ee602 | 633 | EXPORT_SYMBOL_GPL(mddev_init); |
fafd7fb0 | 634 | |
f72ffdd6 | 635 | static struct mddev *mddev_find(dev_t unit) |
1da177e4 | 636 | { |
fd01b88c | 637 | struct mddev *mddev, *new = NULL; |
1da177e4 | 638 | |
8f5f02c4 N |
639 | if (unit && MAJOR(unit) != MD_MAJOR) |
640 | unit &= ~((1<<MdpMinorShift)-1); | |
641 | ||
1da177e4 LT |
642 | retry: |
643 | spin_lock(&all_mddevs_lock); | |
efeb53c0 N |
644 | |
645 | if (unit) { | |
646 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
647 | if (mddev->unit == unit) { | |
648 | mddev_get(mddev); | |
649 | spin_unlock(&all_mddevs_lock); | |
650 | kfree(new); | |
651 | return mddev; | |
652 | } | |
653 | ||
654 | if (new) { | |
655 | list_add(&new->all_mddevs, &all_mddevs); | |
1da177e4 | 656 | spin_unlock(&all_mddevs_lock); |
efeb53c0 N |
657 | new->hold_active = UNTIL_IOCTL; |
658 | return new; | |
1da177e4 | 659 | } |
efeb53c0 N |
660 | } else if (new) { |
661 | /* find an unused unit number */ | |
662 | static int next_minor = 512; | |
663 | int start = next_minor; | |
664 | int is_free = 0; | |
665 | int dev = 0; | |
666 | while (!is_free) { | |
667 | dev = MKDEV(MD_MAJOR, next_minor); | |
668 | next_minor++; | |
669 | if (next_minor > MINORMASK) | |
670 | next_minor = 0; | |
671 | if (next_minor == start) { | |
672 | /* Oh dear, all in use. */ | |
673 | spin_unlock(&all_mddevs_lock); | |
674 | kfree(new); | |
675 | return NULL; | |
676 | } | |
f72ffdd6 | 677 | |
efeb53c0 N |
678 | is_free = 1; |
679 | list_for_each_entry(mddev, &all_mddevs, all_mddevs) | |
680 | if (mddev->unit == dev) { | |
681 | is_free = 0; | |
682 | break; | |
683 | } | |
684 | } | |
685 | new->unit = dev; | |
686 | new->md_minor = MINOR(dev); | |
687 | new->hold_active = UNTIL_STOP; | |
1da177e4 LT |
688 | list_add(&new->all_mddevs, &all_mddevs); |
689 | spin_unlock(&all_mddevs_lock); | |
690 | return new; | |
691 | } | |
692 | spin_unlock(&all_mddevs_lock); | |
693 | ||
9ffae0cf | 694 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
695 | if (!new) |
696 | return NULL; | |
697 | ||
1da177e4 LT |
698 | new->unit = unit; |
699 | if (MAJOR(unit) == MD_MAJOR) | |
700 | new->md_minor = MINOR(unit); | |
701 | else | |
702 | new->md_minor = MINOR(unit) >> MdpMinorShift; | |
703 | ||
fafd7fb0 | 704 | mddev_init(new); |
1da177e4 | 705 | |
1da177e4 LT |
706 | goto retry; |
707 | } | |
708 | ||
b6eb127d N |
709 | static struct attribute_group md_redundancy_group; |
710 | ||
5c47daf6 | 711 | void mddev_unlock(struct mddev *mddev) |
1da177e4 | 712 | { |
a64c876f | 713 | if (mddev->to_remove) { |
b6eb127d N |
714 | /* These cannot be removed under reconfig_mutex as |
715 | * an access to the files will try to take reconfig_mutex | |
716 | * while holding the file unremovable, which leads to | |
717 | * a deadlock. | |
bb4f1e9d N |
718 | * So hold set sysfs_active while the remove in happeing, |
719 | * and anything else which might set ->to_remove or my | |
720 | * otherwise change the sysfs namespace will fail with | |
721 | * -EBUSY if sysfs_active is still set. | |
722 | * We set sysfs_active under reconfig_mutex and elsewhere | |
723 | * test it under the same mutex to ensure its correct value | |
724 | * is seen. | |
b6eb127d | 725 | */ |
a64c876f N |
726 | struct attribute_group *to_remove = mddev->to_remove; |
727 | mddev->to_remove = NULL; | |
bb4f1e9d | 728 | mddev->sysfs_active = 1; |
b6eb127d N |
729 | mutex_unlock(&mddev->reconfig_mutex); |
730 | ||
00bcb4ac N |
731 | if (mddev->kobj.sd) { |
732 | if (to_remove != &md_redundancy_group) | |
733 | sysfs_remove_group(&mddev->kobj, to_remove); | |
734 | if (mddev->pers == NULL || | |
735 | mddev->pers->sync_request == NULL) { | |
736 | sysfs_remove_group(&mddev->kobj, &md_redundancy_group); | |
737 | if (mddev->sysfs_action) | |
738 | sysfs_put(mddev->sysfs_action); | |
739 | mddev->sysfs_action = NULL; | |
740 | } | |
a64c876f | 741 | } |
bb4f1e9d | 742 | mddev->sysfs_active = 0; |
b6eb127d N |
743 | } else |
744 | mutex_unlock(&mddev->reconfig_mutex); | |
1da177e4 | 745 | |
751e67ca CD |
746 | /* As we've dropped the mutex we need a spinlock to |
747 | * make sure the thread doesn't disappear | |
01f96c0a N |
748 | */ |
749 | spin_lock(&pers_lock); | |
005eca5e | 750 | md_wakeup_thread(mddev->thread); |
4d5324f7 | 751 | wake_up(&mddev->sb_wait); |
01f96c0a | 752 | spin_unlock(&pers_lock); |
1da177e4 | 753 | } |
5c47daf6 | 754 | EXPORT_SYMBOL_GPL(mddev_unlock); |
1da177e4 | 755 | |
57d051dc | 756 | struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr) |
1ca69c4b N |
757 | { |
758 | struct md_rdev *rdev; | |
759 | ||
760 | rdev_for_each_rcu(rdev, mddev) | |
761 | if (rdev->desc_nr == nr) | |
762 | return rdev; | |
763 | ||
764 | return NULL; | |
765 | } | |
57d051dc | 766 | EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu); |
1ca69c4b N |
767 | |
768 | static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev) | |
1da177e4 | 769 | { |
3cb03002 | 770 | struct md_rdev *rdev; |
1da177e4 | 771 | |
dafb20fa | 772 | rdev_for_each(rdev, mddev) |
1da177e4 LT |
773 | if (rdev->bdev->bd_dev == dev) |
774 | return rdev; | |
159ec1fc | 775 | |
1da177e4 LT |
776 | return NULL; |
777 | } | |
778 | ||
1532d9e8 | 779 | struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev) |
1ca69c4b N |
780 | { |
781 | struct md_rdev *rdev; | |
782 | ||
783 | rdev_for_each_rcu(rdev, mddev) | |
784 | if (rdev->bdev->bd_dev == dev) | |
785 | return rdev; | |
786 | ||
787 | return NULL; | |
788 | } | |
1532d9e8 | 789 | EXPORT_SYMBOL_GPL(md_find_rdev_rcu); |
1ca69c4b | 790 | |
84fc4b56 | 791 | static struct md_personality *find_pers(int level, char *clevel) |
2604b703 | 792 | { |
84fc4b56 | 793 | struct md_personality *pers; |
d9d166c2 N |
794 | list_for_each_entry(pers, &pers_list, list) { |
795 | if (level != LEVEL_NONE && pers->level == level) | |
2604b703 | 796 | return pers; |
d9d166c2 N |
797 | if (strcmp(pers->name, clevel)==0) |
798 | return pers; | |
799 | } | |
2604b703 N |
800 | return NULL; |
801 | } | |
802 | ||
b73df2d3 | 803 | /* return the offset of the super block in 512byte sectors */ |
3cb03002 | 804 | static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) |
1da177e4 | 805 | { |
57b2caa3 | 806 | sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; |
b73df2d3 | 807 | return MD_NEW_SIZE_SECTORS(num_sectors); |
1da177e4 LT |
808 | } |
809 | ||
f72ffdd6 | 810 | static int alloc_disk_sb(struct md_rdev *rdev) |
1da177e4 | 811 | { |
1da177e4 | 812 | rdev->sb_page = alloc_page(GFP_KERNEL); |
7f0f0d87 | 813 | if (!rdev->sb_page) |
ebc24337 | 814 | return -ENOMEM; |
1da177e4 LT |
815 | return 0; |
816 | } | |
817 | ||
545c8795 | 818 | void md_rdev_clear(struct md_rdev *rdev) |
1da177e4 LT |
819 | { |
820 | if (rdev->sb_page) { | |
2d1f3b5d | 821 | put_page(rdev->sb_page); |
1da177e4 LT |
822 | rdev->sb_loaded = 0; |
823 | rdev->sb_page = NULL; | |
0f420358 | 824 | rdev->sb_start = 0; |
dd8ac336 | 825 | rdev->sectors = 0; |
1da177e4 | 826 | } |
2699b672 N |
827 | if (rdev->bb_page) { |
828 | put_page(rdev->bb_page); | |
829 | rdev->bb_page = NULL; | |
830 | } | |
d3b407fb | 831 | badblocks_exit(&rdev->badblocks); |
1da177e4 | 832 | } |
545c8795 | 833 | EXPORT_SYMBOL_GPL(md_rdev_clear); |
1da177e4 | 834 | |
4246a0b6 | 835 | static void super_written(struct bio *bio) |
7bfa19f2 | 836 | { |
3cb03002 | 837 | struct md_rdev *rdev = bio->bi_private; |
fd01b88c | 838 | struct mddev *mddev = rdev->mddev; |
7bfa19f2 | 839 | |
4e4cbee9 CH |
840 | if (bio->bi_status) { |
841 | pr_err("md: super_written gets error=%d\n", bio->bi_status); | |
a9701a30 | 842 | md_error(mddev, rdev); |
46533ff7 N |
843 | if (!test_bit(Faulty, &rdev->flags) |
844 | && (bio->bi_opf & MD_FAILFAST)) { | |
2953079c | 845 | set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags); |
46533ff7 N |
846 | set_bit(LastDev, &rdev->flags); |
847 | } | |
848 | } else | |
849 | clear_bit(LastDev, &rdev->flags); | |
7bfa19f2 | 850 | |
a9701a30 N |
851 | if (atomic_dec_and_test(&mddev->pending_writes)) |
852 | wake_up(&mddev->sb_wait); | |
ed3b98c7 | 853 | rdev_dec_pending(rdev, mddev); |
f8b58edf | 854 | bio_put(bio); |
7bfa19f2 N |
855 | } |
856 | ||
fd01b88c | 857 | void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
7bfa19f2 N |
858 | sector_t sector, int size, struct page *page) |
859 | { | |
860 | /* write first size bytes of page to sector of rdev | |
861 | * Increment mddev->pending_writes before returning | |
862 | * and decrement it on completion, waking up sb_wait | |
863 | * if zero is reached. | |
864 | * If an error occurred, call md_error | |
865 | */ | |
46533ff7 N |
866 | struct bio *bio; |
867 | int ff = 0; | |
868 | ||
4b6c1060 HM |
869 | if (!page) |
870 | return; | |
871 | ||
46533ff7 N |
872 | if (test_bit(Faulty, &rdev->flags)) |
873 | return; | |
874 | ||
5a85071c | 875 | bio = md_bio_alloc_sync(mddev); |
7bfa19f2 | 876 | |
ed3b98c7 SL |
877 | atomic_inc(&rdev->nr_pending); |
878 | ||
74d46992 | 879 | bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev); |
4f024f37 | 880 | bio->bi_iter.bi_sector = sector; |
7bfa19f2 N |
881 | bio_add_page(bio, page, size, 0); |
882 | bio->bi_private = rdev; | |
883 | bio->bi_end_io = super_written; | |
46533ff7 N |
884 | |
885 | if (test_bit(MD_FAILFAST_SUPPORTED, &mddev->flags) && | |
886 | test_bit(FailFast, &rdev->flags) && | |
887 | !test_bit(LastDev, &rdev->flags)) | |
888 | ff = MD_FAILFAST; | |
5a8948f8 | 889 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA | ff; |
a9701a30 | 890 | |
7bfa19f2 | 891 | atomic_inc(&mddev->pending_writes); |
4e49ea4a | 892 | submit_bio(bio); |
a9701a30 N |
893 | } |
894 | ||
46533ff7 | 895 | int md_super_wait(struct mddev *mddev) |
a9701a30 | 896 | { |
e9c7469b | 897 | /* wait for all superblock writes that were scheduled to complete */ |
1967cd56 | 898 | wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0); |
2953079c | 899 | if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags)) |
46533ff7 N |
900 | return -EAGAIN; |
901 | return 0; | |
7bfa19f2 N |
902 | } |
903 | ||
3cb03002 | 904 | int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf0 | 905 | struct page *page, int op, int op_flags, bool metadata_op) |
1da177e4 | 906 | { |
5a85071c | 907 | struct bio *bio = md_bio_alloc_sync(rdev->mddev); |
1da177e4 LT |
908 | int ret; |
909 | ||
74d46992 CH |
910 | if (metadata_op && rdev->meta_bdev) |
911 | bio_set_dev(bio, rdev->meta_bdev); | |
912 | else | |
913 | bio_set_dev(bio, rdev->bdev); | |
796a5cf0 | 914 | bio_set_op_attrs(bio, op, op_flags); |
ccebd4c4 | 915 | if (metadata_op) |
4f024f37 | 916 | bio->bi_iter.bi_sector = sector + rdev->sb_start; |
1fdd6fc9 N |
917 | else if (rdev->mddev->reshape_position != MaxSector && |
918 | (rdev->mddev->reshape_backwards == | |
919 | (sector >= rdev->mddev->reshape_position))) | |
4f024f37 | 920 | bio->bi_iter.bi_sector = sector + rdev->new_data_offset; |
ccebd4c4 | 921 | else |
4f024f37 | 922 | bio->bi_iter.bi_sector = sector + rdev->data_offset; |
1da177e4 | 923 | bio_add_page(bio, page, size, 0); |
4e49ea4a MC |
924 | |
925 | submit_bio_wait(bio); | |
1da177e4 | 926 | |
4e4cbee9 | 927 | ret = !bio->bi_status; |
1da177e4 LT |
928 | bio_put(bio); |
929 | return ret; | |
930 | } | |
a8745db2 | 931 | EXPORT_SYMBOL_GPL(sync_page_io); |
1da177e4 | 932 | |
f72ffdd6 | 933 | static int read_disk_sb(struct md_rdev *rdev, int size) |
1da177e4 LT |
934 | { |
935 | char b[BDEVNAME_SIZE]; | |
403df478 | 936 | |
1da177e4 LT |
937 | if (rdev->sb_loaded) |
938 | return 0; | |
939 | ||
796a5cf0 | 940 | if (!sync_page_io(rdev, 0, size, rdev->sb_page, REQ_OP_READ, 0, true)) |
1da177e4 LT |
941 | goto fail; |
942 | rdev->sb_loaded = 1; | |
943 | return 0; | |
944 | ||
945 | fail: | |
9d48739e N |
946 | pr_err("md: disabled device %s, could not read superblock.\n", |
947 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
948 | return -EINVAL; |
949 | } | |
950 | ||
e6fd2093 | 951 | static int md_uuid_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 | 952 | { |
f72ffdd6 | 953 | return sb1->set_uuid0 == sb2->set_uuid0 && |
05710466 AN |
954 | sb1->set_uuid1 == sb2->set_uuid1 && |
955 | sb1->set_uuid2 == sb2->set_uuid2 && | |
956 | sb1->set_uuid3 == sb2->set_uuid3; | |
1da177e4 LT |
957 | } |
958 | ||
e6fd2093 | 959 | static int md_sb_equal(mdp_super_t *sb1, mdp_super_t *sb2) |
1da177e4 LT |
960 | { |
961 | int ret; | |
962 | mdp_super_t *tmp1, *tmp2; | |
963 | ||
964 | tmp1 = kmalloc(sizeof(*tmp1),GFP_KERNEL); | |
965 | tmp2 = kmalloc(sizeof(*tmp2),GFP_KERNEL); | |
966 | ||
967 | if (!tmp1 || !tmp2) { | |
968 | ret = 0; | |
1da177e4 LT |
969 | goto abort; |
970 | } | |
971 | ||
972 | *tmp1 = *sb1; | |
973 | *tmp2 = *sb2; | |
974 | ||
975 | /* | |
976 | * nr_disks is not constant | |
977 | */ | |
978 | tmp1->nr_disks = 0; | |
979 | tmp2->nr_disks = 0; | |
980 | ||
ce0c8e05 | 981 | ret = (memcmp(tmp1, tmp2, MD_SB_GENERIC_CONSTANT_WORDS * 4) == 0); |
1da177e4 | 982 | abort: |
990a8baf JJ |
983 | kfree(tmp1); |
984 | kfree(tmp2); | |
1da177e4 LT |
985 | return ret; |
986 | } | |
987 | ||
4d167f09 N |
988 | static u32 md_csum_fold(u32 csum) |
989 | { | |
990 | csum = (csum & 0xffff) + (csum >> 16); | |
991 | return (csum & 0xffff) + (csum >> 16); | |
992 | } | |
993 | ||
f72ffdd6 | 994 | static unsigned int calc_sb_csum(mdp_super_t *sb) |
1da177e4 | 995 | { |
4d167f09 N |
996 | u64 newcsum = 0; |
997 | u32 *sb32 = (u32*)sb; | |
998 | int i; | |
1da177e4 LT |
999 | unsigned int disk_csum, csum; |
1000 | ||
1001 | disk_csum = sb->sb_csum; | |
1002 | sb->sb_csum = 0; | |
4d167f09 N |
1003 | |
1004 | for (i = 0; i < MD_SB_BYTES/4 ; i++) | |
1005 | newcsum += sb32[i]; | |
1006 | csum = (newcsum & 0xffffffff) + (newcsum>>32); | |
1007 | ||
4d167f09 N |
1008 | #ifdef CONFIG_ALPHA |
1009 | /* This used to use csum_partial, which was wrong for several | |
1010 | * reasons including that different results are returned on | |
1011 | * different architectures. It isn't critical that we get exactly | |
1012 | * the same return value as before (we always csum_fold before | |
1013 | * testing, and that removes any differences). However as we | |
1014 | * know that csum_partial always returned a 16bit value on | |
1015 | * alphas, do a fold to maximise conformity to previous behaviour. | |
1016 | */ | |
1017 | sb->sb_csum = md_csum_fold(disk_csum); | |
1018 | #else | |
1da177e4 | 1019 | sb->sb_csum = disk_csum; |
4d167f09 | 1020 | #endif |
1da177e4 LT |
1021 | return csum; |
1022 | } | |
1023 | ||
1da177e4 LT |
1024 | /* |
1025 | * Handle superblock details. | |
1026 | * We want to be able to handle multiple superblock formats | |
1027 | * so we have a common interface to them all, and an array of | |
1028 | * different handlers. | |
1029 | * We rely on user-space to write the initial superblock, and support | |
1030 | * reading and updating of superblocks. | |
1031 | * Interface methods are: | |
3cb03002 | 1032 | * int load_super(struct md_rdev *dev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1033 | * loads and validates a superblock on dev. |
1034 | * if refdev != NULL, compare superblocks on both devices | |
1035 | * Return: | |
1036 | * 0 - dev has a superblock that is compatible with refdev | |
1037 | * 1 - dev has a superblock that is compatible and newer than refdev | |
1038 | * so dev should be used as the refdev in future | |
1039 | * -EINVAL superblock incompatible or invalid | |
1040 | * -othererror e.g. -EIO | |
1041 | * | |
fd01b88c | 1042 | * int validate_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1043 | * Verify that dev is acceptable into mddev. |
1044 | * The first time, mddev->raid_disks will be 0, and data from | |
1045 | * dev should be merged in. Subsequent calls check that dev | |
1046 | * is new enough. Return 0 or -EINVAL | |
1047 | * | |
fd01b88c | 1048 | * void sync_super(struct mddev *mddev, struct md_rdev *dev) |
1da177e4 LT |
1049 | * Update the superblock for rdev with data in mddev |
1050 | * This does not write to disc. | |
1051 | * | |
1052 | */ | |
1053 | ||
1054 | struct super_type { | |
0cd17fec CW |
1055 | char *name; |
1056 | struct module *owner; | |
c6563a8c N |
1057 | int (*load_super)(struct md_rdev *rdev, |
1058 | struct md_rdev *refdev, | |
0cd17fec | 1059 | int minor_version); |
c6563a8c N |
1060 | int (*validate_super)(struct mddev *mddev, |
1061 | struct md_rdev *rdev); | |
1062 | void (*sync_super)(struct mddev *mddev, | |
1063 | struct md_rdev *rdev); | |
3cb03002 | 1064 | unsigned long long (*rdev_size_change)(struct md_rdev *rdev, |
15f4a5fd | 1065 | sector_t num_sectors); |
c6563a8c N |
1066 | int (*allow_new_offset)(struct md_rdev *rdev, |
1067 | unsigned long long new_offset); | |
1da177e4 LT |
1068 | }; |
1069 | ||
0894cc30 AN |
1070 | /* |
1071 | * Check that the given mddev has no bitmap. | |
1072 | * | |
1073 | * This function is called from the run method of all personalities that do not | |
1074 | * support bitmaps. It prints an error message and returns non-zero if mddev | |
1075 | * has a bitmap. Otherwise, it returns 0. | |
1076 | * | |
1077 | */ | |
fd01b88c | 1078 | int md_check_no_bitmap(struct mddev *mddev) |
0894cc30 | 1079 | { |
c3d9714e | 1080 | if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset) |
0894cc30 | 1081 | return 0; |
9d48739e | 1082 | pr_warn("%s: bitmaps are not supported for %s\n", |
0894cc30 AN |
1083 | mdname(mddev), mddev->pers->name); |
1084 | return 1; | |
1085 | } | |
1086 | EXPORT_SYMBOL(md_check_no_bitmap); | |
1087 | ||
1da177e4 | 1088 | /* |
f72ffdd6 | 1089 | * load_super for 0.90.0 |
1da177e4 | 1090 | */ |
3cb03002 | 1091 | static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1092 | { |
1093 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
1094 | mdp_super_t *sb; | |
1095 | int ret; | |
1da177e4 LT |
1096 | |
1097 | /* | |
0f420358 | 1098 | * Calculate the position of the superblock (512byte sectors), |
1da177e4 LT |
1099 | * it's at the end of the disk. |
1100 | * | |
1101 | * It also happens to be a multiple of 4Kb. | |
1102 | */ | |
57b2caa3 | 1103 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 1104 | |
0002b271 | 1105 | ret = read_disk_sb(rdev, MD_SB_BYTES); |
9d48739e N |
1106 | if (ret) |
1107 | return ret; | |
1da177e4 LT |
1108 | |
1109 | ret = -EINVAL; | |
1110 | ||
1111 | bdevname(rdev->bdev, b); | |
65a06f06 | 1112 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1113 | |
1114 | if (sb->md_magic != MD_SB_MAGIC) { | |
9d48739e | 1115 | pr_warn("md: invalid raid superblock magic on %s\n", b); |
1da177e4 LT |
1116 | goto abort; |
1117 | } | |
1118 | ||
1119 | if (sb->major_version != 0 || | |
f6705578 N |
1120 | sb->minor_version < 90 || |
1121 | sb->minor_version > 91) { | |
9d48739e N |
1122 | pr_warn("Bad version number %d.%d on %s\n", |
1123 | sb->major_version, sb->minor_version, b); | |
1da177e4 LT |
1124 | goto abort; |
1125 | } | |
1126 | ||
1127 | if (sb->raid_disks <= 0) | |
1128 | goto abort; | |
1129 | ||
4d167f09 | 1130 | if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) { |
9d48739e | 1131 | pr_warn("md: invalid superblock checksum on %s\n", b); |
1da177e4 LT |
1132 | goto abort; |
1133 | } | |
1134 | ||
1135 | rdev->preferred_minor = sb->md_minor; | |
1136 | rdev->data_offset = 0; | |
c6563a8c | 1137 | rdev->new_data_offset = 0; |
0002b271 | 1138 | rdev->sb_size = MD_SB_BYTES; |
9f2f3830 | 1139 | rdev->badblocks.shift = -1; |
1da177e4 LT |
1140 | |
1141 | if (sb->level == LEVEL_MULTIPATH) | |
1142 | rdev->desc_nr = -1; | |
1143 | else | |
1144 | rdev->desc_nr = sb->this_disk.number; | |
1145 | ||
9a7b2b0f | 1146 | if (!refdev) { |
1da177e4 | 1147 | ret = 1; |
9a7b2b0f | 1148 | } else { |
1da177e4 | 1149 | __u64 ev1, ev2; |
65a06f06 | 1150 | mdp_super_t *refsb = page_address(refdev->sb_page); |
e6fd2093 | 1151 | if (!md_uuid_equal(refsb, sb)) { |
9d48739e | 1152 | pr_warn("md: %s has different UUID to %s\n", |
1da177e4 LT |
1153 | b, bdevname(refdev->bdev,b2)); |
1154 | goto abort; | |
1155 | } | |
e6fd2093 | 1156 | if (!md_sb_equal(refsb, sb)) { |
9d48739e N |
1157 | pr_warn("md: %s has same UUID but different superblock to %s\n", |
1158 | b, bdevname(refdev->bdev, b2)); | |
1da177e4 LT |
1159 | goto abort; |
1160 | } | |
1161 | ev1 = md_event(sb); | |
1162 | ev2 = md_event(refsb); | |
1163 | if (ev1 > ev2) | |
1164 | ret = 1; | |
f72ffdd6 | 1165 | else |
1da177e4 LT |
1166 | ret = 0; |
1167 | } | |
8190e754 | 1168 | rdev->sectors = rdev->sb_start; |
667a5313 N |
1169 | /* Limit to 4TB as metadata cannot record more than that. |
1170 | * (not needed for Linear and RAID0 as metadata doesn't | |
1171 | * record this size) | |
1172 | */ | |
72deb455 | 1173 | if ((u64)rdev->sectors >= (2ULL << 32) && sb->level >= 1) |
3312c951 | 1174 | rdev->sectors = (sector_t)(2ULL << 32) - 2; |
1da177e4 | 1175 | |
27a7b260 | 1176 | if (rdev->sectors < ((sector_t)sb->size) * 2 && sb->level >= 1) |
2bf071bf N |
1177 | /* "this cannot possibly happen" ... */ |
1178 | ret = -EINVAL; | |
1179 | ||
1da177e4 LT |
1180 | abort: |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * validate_super for 0.90.0 | |
1186 | */ | |
fd01b88c | 1187 | static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1188 | { |
1189 | mdp_disk_t *desc; | |
65a06f06 | 1190 | mdp_super_t *sb = page_address(rdev->sb_page); |
07d84d10 | 1191 | __u64 ev1 = md_event(sb); |
1da177e4 | 1192 | |
41158c7e | 1193 | rdev->raid_disk = -1; |
c5d79adb N |
1194 | clear_bit(Faulty, &rdev->flags); |
1195 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1196 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1197 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1198 | |
1da177e4 LT |
1199 | if (mddev->raid_disks == 0) { |
1200 | mddev->major_version = 0; | |
1201 | mddev->minor_version = sb->minor_version; | |
1202 | mddev->patch_version = sb->patch_version; | |
e691063a | 1203 | mddev->external = 0; |
9d8f0363 | 1204 | mddev->chunk_sectors = sb->chunk_size >> 9; |
1da177e4 LT |
1205 | mddev->ctime = sb->ctime; |
1206 | mddev->utime = sb->utime; | |
1207 | mddev->level = sb->level; | |
d9d166c2 | 1208 | mddev->clevel[0] = 0; |
1da177e4 LT |
1209 | mddev->layout = sb->layout; |
1210 | mddev->raid_disks = sb->raid_disks; | |
27a7b260 | 1211 | mddev->dev_sectors = ((sector_t)sb->size) * 2; |
07d84d10 | 1212 | mddev->events = ev1; |
c3d9714e | 1213 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1214 | mddev->bitmap_info.space = 0; |
1215 | /* bitmap can use 60 K after the 4K superblocks */ | |
c3d9714e | 1216 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 1217 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
2c810cdd | 1218 | mddev->reshape_backwards = 0; |
1da177e4 | 1219 | |
f6705578 N |
1220 | if (mddev->minor_version >= 91) { |
1221 | mddev->reshape_position = sb->reshape_position; | |
1222 | mddev->delta_disks = sb->delta_disks; | |
1223 | mddev->new_level = sb->new_level; | |
1224 | mddev->new_layout = sb->new_layout; | |
664e7c41 | 1225 | mddev->new_chunk_sectors = sb->new_chunk >> 9; |
2c810cdd N |
1226 | if (mddev->delta_disks < 0) |
1227 | mddev->reshape_backwards = 1; | |
f6705578 N |
1228 | } else { |
1229 | mddev->reshape_position = MaxSector; | |
1230 | mddev->delta_disks = 0; | |
1231 | mddev->new_level = mddev->level; | |
1232 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1233 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1234 | } |
1235 | ||
1da177e4 LT |
1236 | if (sb->state & (1<<MD_SB_CLEAN)) |
1237 | mddev->recovery_cp = MaxSector; | |
1238 | else { | |
f72ffdd6 | 1239 | if (sb->events_hi == sb->cp_events_hi && |
1da177e4 LT |
1240 | sb->events_lo == sb->cp_events_lo) { |
1241 | mddev->recovery_cp = sb->recovery_cp; | |
1242 | } else | |
1243 | mddev->recovery_cp = 0; | |
1244 | } | |
1245 | ||
1246 | memcpy(mddev->uuid+0, &sb->set_uuid0, 4); | |
1247 | memcpy(mddev->uuid+4, &sb->set_uuid1, 4); | |
1248 | memcpy(mddev->uuid+8, &sb->set_uuid2, 4); | |
1249 | memcpy(mddev->uuid+12,&sb->set_uuid3, 4); | |
1250 | ||
1251 | mddev->max_disks = MD_SB_DISKS; | |
a654b9d8 N |
1252 | |
1253 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT) && | |
6409bb05 | 1254 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1255 | mddev->bitmap_info.offset = |
1256 | mddev->bitmap_info.default_offset; | |
6409bb05 | 1257 | mddev->bitmap_info.space = |
c9ad020f | 1258 | mddev->bitmap_info.default_space; |
6409bb05 | 1259 | } |
a654b9d8 | 1260 | |
41158c7e | 1261 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1262 | /* Insist on good event counter while assembling, except |
1263 | * for spares (which don't need an event count) */ | |
1da177e4 | 1264 | ++ev1; |
be6800a7 N |
1265 | if (sb->disks[rdev->desc_nr].state & ( |
1266 | (1<<MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE))) | |
f72ffdd6 | 1267 | if (ev1 < mddev->events) |
be6800a7 | 1268 | return -EINVAL; |
41158c7e N |
1269 | } else if (mddev->bitmap) { |
1270 | /* if adding to array with a bitmap, then we can accept an | |
1271 | * older device ... but not too old. | |
1272 | */ | |
41158c7e N |
1273 | if (ev1 < mddev->bitmap->events_cleared) |
1274 | return 0; | |
8313b8e5 N |
1275 | if (ev1 < mddev->events) |
1276 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1277 | } else { |
1278 | if (ev1 < mddev->events) | |
1279 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1280 | return 0; | |
1281 | } | |
41158c7e | 1282 | |
1da177e4 | 1283 | if (mddev->level != LEVEL_MULTIPATH) { |
1da177e4 LT |
1284 | desc = sb->disks + rdev->desc_nr; |
1285 | ||
1286 | if (desc->state & (1<<MD_DISK_FAULTY)) | |
b2d444d7 | 1287 | set_bit(Faulty, &rdev->flags); |
7c7546cc N |
1288 | else if (desc->state & (1<<MD_DISK_SYNC) /* && |
1289 | desc->raid_disk < mddev->raid_disks */) { | |
b2d444d7 | 1290 | set_bit(In_sync, &rdev->flags); |
1da177e4 | 1291 | rdev->raid_disk = desc->raid_disk; |
f466722c | 1292 | rdev->saved_raid_disk = desc->raid_disk; |
0261cd9f N |
1293 | } else if (desc->state & (1<<MD_DISK_ACTIVE)) { |
1294 | /* active but not in sync implies recovery up to | |
1295 | * reshape position. We don't know exactly where | |
1296 | * that is, so set to zero for now */ | |
1297 | if (mddev->minor_version >= 91) { | |
1298 | rdev->recovery_offset = 0; | |
1299 | rdev->raid_disk = desc->raid_disk; | |
1300 | } | |
1da177e4 | 1301 | } |
8ddf9efe N |
1302 | if (desc->state & (1<<MD_DISK_WRITEMOSTLY)) |
1303 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1304 | if (desc->state & (1<<MD_DISK_FAILFAST)) |
1305 | set_bit(FailFast, &rdev->flags); | |
41158c7e | 1306 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1307 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1308 | return 0; |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * sync_super for 0.90.0 | |
1313 | */ | |
fd01b88c | 1314 | static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1315 | { |
1316 | mdp_super_t *sb; | |
3cb03002 | 1317 | struct md_rdev *rdev2; |
1da177e4 | 1318 | int next_spare = mddev->raid_disks; |
19133a42 | 1319 | |
1da177e4 LT |
1320 | /* make rdev->sb match mddev data.. |
1321 | * | |
1322 | * 1/ zero out disks | |
1323 | * 2/ Add info for each disk, keeping track of highest desc_nr (next_spare); | |
1324 | * 3/ any empty disks < next_spare become removed | |
1325 | * | |
1326 | * disks[0] gets initialised to REMOVED because | |
1327 | * we cannot be sure from other fields if it has | |
1328 | * been initialised or not. | |
1329 | */ | |
1330 | int i; | |
1331 | int active=0, working=0,failed=0,spare=0,nr_disks=0; | |
1332 | ||
61181565 N |
1333 | rdev->sb_size = MD_SB_BYTES; |
1334 | ||
65a06f06 | 1335 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1336 | |
1337 | memset(sb, 0, sizeof(*sb)); | |
1338 | ||
1339 | sb->md_magic = MD_SB_MAGIC; | |
1340 | sb->major_version = mddev->major_version; | |
1da177e4 LT |
1341 | sb->patch_version = mddev->patch_version; |
1342 | sb->gvalid_words = 0; /* ignored */ | |
1343 | memcpy(&sb->set_uuid0, mddev->uuid+0, 4); | |
1344 | memcpy(&sb->set_uuid1, mddev->uuid+4, 4); | |
1345 | memcpy(&sb->set_uuid2, mddev->uuid+8, 4); | |
1346 | memcpy(&sb->set_uuid3, mddev->uuid+12,4); | |
1347 | ||
9ebc6ef1 | 1348 | sb->ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 1349 | sb->level = mddev->level; |
58c0fed4 | 1350 | sb->size = mddev->dev_sectors / 2; |
1da177e4 LT |
1351 | sb->raid_disks = mddev->raid_disks; |
1352 | sb->md_minor = mddev->md_minor; | |
e691063a | 1353 | sb->not_persistent = 0; |
9ebc6ef1 | 1354 | sb->utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
1355 | sb->state = 0; |
1356 | sb->events_hi = (mddev->events>>32); | |
1357 | sb->events_lo = (u32)mddev->events; | |
1358 | ||
f6705578 N |
1359 | if (mddev->reshape_position == MaxSector) |
1360 | sb->minor_version = 90; | |
1361 | else { | |
1362 | sb->minor_version = 91; | |
1363 | sb->reshape_position = mddev->reshape_position; | |
1364 | sb->new_level = mddev->new_level; | |
1365 | sb->delta_disks = mddev->delta_disks; | |
1366 | sb->new_layout = mddev->new_layout; | |
664e7c41 | 1367 | sb->new_chunk = mddev->new_chunk_sectors << 9; |
f6705578 N |
1368 | } |
1369 | mddev->minor_version = sb->minor_version; | |
1da177e4 LT |
1370 | if (mddev->in_sync) |
1371 | { | |
1372 | sb->recovery_cp = mddev->recovery_cp; | |
1373 | sb->cp_events_hi = (mddev->events>>32); | |
1374 | sb->cp_events_lo = (u32)mddev->events; | |
1375 | if (mddev->recovery_cp == MaxSector) | |
1376 | sb->state = (1<< MD_SB_CLEAN); | |
1377 | } else | |
1378 | sb->recovery_cp = 0; | |
1379 | ||
1380 | sb->layout = mddev->layout; | |
9d8f0363 | 1381 | sb->chunk_size = mddev->chunk_sectors << 9; |
1da177e4 | 1382 | |
c3d9714e | 1383 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) |
a654b9d8 N |
1384 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
1385 | ||
1da177e4 | 1386 | sb->disks[0].state = (1<<MD_DISK_REMOVED); |
dafb20fa | 1387 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1388 | mdp_disk_t *d; |
86e6ffdd | 1389 | int desc_nr; |
0261cd9f N |
1390 | int is_active = test_bit(In_sync, &rdev2->flags); |
1391 | ||
1392 | if (rdev2->raid_disk >= 0 && | |
1393 | sb->minor_version >= 91) | |
1394 | /* we have nowhere to store the recovery_offset, | |
1395 | * but if it is not below the reshape_position, | |
1396 | * we can piggy-back on that. | |
1397 | */ | |
1398 | is_active = 1; | |
1399 | if (rdev2->raid_disk < 0 || | |
1400 | test_bit(Faulty, &rdev2->flags)) | |
1401 | is_active = 0; | |
1402 | if (is_active) | |
86e6ffdd | 1403 | desc_nr = rdev2->raid_disk; |
1da177e4 | 1404 | else |
86e6ffdd | 1405 | desc_nr = next_spare++; |
19133a42 | 1406 | rdev2->desc_nr = desc_nr; |
1da177e4 LT |
1407 | d = &sb->disks[rdev2->desc_nr]; |
1408 | nr_disks++; | |
1409 | d->number = rdev2->desc_nr; | |
1410 | d->major = MAJOR(rdev2->bdev->bd_dev); | |
1411 | d->minor = MINOR(rdev2->bdev->bd_dev); | |
0261cd9f | 1412 | if (is_active) |
1da177e4 LT |
1413 | d->raid_disk = rdev2->raid_disk; |
1414 | else | |
1415 | d->raid_disk = rdev2->desc_nr; /* compatibility */ | |
1be7892f | 1416 | if (test_bit(Faulty, &rdev2->flags)) |
1da177e4 | 1417 | d->state = (1<<MD_DISK_FAULTY); |
0261cd9f | 1418 | else if (is_active) { |
1da177e4 | 1419 | d->state = (1<<MD_DISK_ACTIVE); |
0261cd9f N |
1420 | if (test_bit(In_sync, &rdev2->flags)) |
1421 | d->state |= (1<<MD_DISK_SYNC); | |
1da177e4 LT |
1422 | active++; |
1423 | working++; | |
1424 | } else { | |
1425 | d->state = 0; | |
1426 | spare++; | |
1427 | working++; | |
1428 | } | |
8ddf9efe N |
1429 | if (test_bit(WriteMostly, &rdev2->flags)) |
1430 | d->state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
1431 | if (test_bit(FailFast, &rdev2->flags)) |
1432 | d->state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 | 1433 | } |
1da177e4 LT |
1434 | /* now set the "removed" and "faulty" bits on any missing devices */ |
1435 | for (i=0 ; i < mddev->raid_disks ; i++) { | |
1436 | mdp_disk_t *d = &sb->disks[i]; | |
1437 | if (d->state == 0 && d->number == 0) { | |
1438 | d->number = i; | |
1439 | d->raid_disk = i; | |
1440 | d->state = (1<<MD_DISK_REMOVED); | |
1441 | d->state |= (1<<MD_DISK_FAULTY); | |
1442 | failed++; | |
1443 | } | |
1444 | } | |
1445 | sb->nr_disks = nr_disks; | |
1446 | sb->active_disks = active; | |
1447 | sb->working_disks = working; | |
1448 | sb->failed_disks = failed; | |
1449 | sb->spare_disks = spare; | |
1450 | ||
1451 | sb->this_disk = sb->disks[rdev->desc_nr]; | |
1452 | sb->sb_csum = calc_sb_csum(sb); | |
1453 | } | |
1454 | ||
0cd17fec CW |
1455 | /* |
1456 | * rdev_size_change for 0.90.0 | |
1457 | */ | |
1458 | static unsigned long long | |
3cb03002 | 1459 | super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec | 1460 | { |
58c0fed4 | 1461 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 1462 | return 0; /* component must fit device */ |
c3d9714e | 1463 | if (rdev->mddev->bitmap_info.offset) |
0cd17fec | 1464 | return 0; /* can't move bitmap */ |
57b2caa3 | 1465 | rdev->sb_start = calc_dev_sboffset(rdev); |
15f4a5fd AN |
1466 | if (!num_sectors || num_sectors > rdev->sb_start) |
1467 | num_sectors = rdev->sb_start; | |
27a7b260 N |
1468 | /* Limit to 4TB as metadata cannot record more than that. |
1469 | * 4TB == 2^32 KB, or 2*2^32 sectors. | |
1470 | */ | |
72deb455 | 1471 | if ((u64)num_sectors >= (2ULL << 32) && rdev->mddev->level >= 1) |
3312c951 | 1472 | num_sectors = (sector_t)(2ULL << 32) - 2; |
46533ff7 N |
1473 | do { |
1474 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
0cd17fec | 1475 | rdev->sb_page); |
46533ff7 | 1476 | } while (md_super_wait(rdev->mddev) < 0); |
c26a44ed | 1477 | return num_sectors; |
0cd17fec CW |
1478 | } |
1479 | ||
c6563a8c N |
1480 | static int |
1481 | super_90_allow_new_offset(struct md_rdev *rdev, unsigned long long new_offset) | |
1482 | { | |
1483 | /* non-zero offset changes not possible with v0.90 */ | |
1484 | return new_offset == 0; | |
1485 | } | |
0cd17fec | 1486 | |
1da177e4 LT |
1487 | /* |
1488 | * version 1 superblock | |
1489 | */ | |
1490 | ||
f72ffdd6 | 1491 | static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) |
1da177e4 | 1492 | { |
1c05b4bc N |
1493 | __le32 disk_csum; |
1494 | u32 csum; | |
1da177e4 LT |
1495 | unsigned long long newcsum; |
1496 | int size = 256 + le32_to_cpu(sb->max_dev)*2; | |
1c05b4bc | 1497 | __le32 *isuper = (__le32*)sb; |
1da177e4 LT |
1498 | |
1499 | disk_csum = sb->sb_csum; | |
1500 | sb->sb_csum = 0; | |
1501 | newcsum = 0; | |
1f3c9907 | 1502 | for (; size >= 4; size -= 4) |
1da177e4 LT |
1503 | newcsum += le32_to_cpu(*isuper++); |
1504 | ||
1505 | if (size == 2) | |
1c05b4bc | 1506 | newcsum += le16_to_cpu(*(__le16*) isuper); |
1da177e4 LT |
1507 | |
1508 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
1509 | sb->sb_csum = disk_csum; | |
1510 | return cpu_to_le32(csum); | |
1511 | } | |
1512 | ||
3cb03002 | 1513 | static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) |
1da177e4 LT |
1514 | { |
1515 | struct mdp_superblock_1 *sb; | |
1516 | int ret; | |
0f420358 | 1517 | sector_t sb_start; |
c6563a8c | 1518 | sector_t sectors; |
1da177e4 | 1519 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; |
0002b271 | 1520 | int bmask; |
1da177e4 LT |
1521 | |
1522 | /* | |
0f420358 | 1523 | * Calculate the position of the superblock in 512byte sectors. |
1da177e4 LT |
1524 | * It is always aligned to a 4K boundary and |
1525 | * depeding on minor_version, it can be: | |
1526 | * 0: At least 8K, but less than 12K, from end of device | |
1527 | * 1: At start of device | |
1528 | * 2: 4K from start of device. | |
1529 | */ | |
1530 | switch(minor_version) { | |
1531 | case 0: | |
77304d2a | 1532 | sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; |
0f420358 AN |
1533 | sb_start -= 8*2; |
1534 | sb_start &= ~(sector_t)(4*2-1); | |
1da177e4 LT |
1535 | break; |
1536 | case 1: | |
0f420358 | 1537 | sb_start = 0; |
1da177e4 LT |
1538 | break; |
1539 | case 2: | |
0f420358 | 1540 | sb_start = 8; |
1da177e4 LT |
1541 | break; |
1542 | default: | |
1543 | return -EINVAL; | |
1544 | } | |
0f420358 | 1545 | rdev->sb_start = sb_start; |
1da177e4 | 1546 | |
0002b271 N |
1547 | /* superblock is rarely larger than 1K, but it can be larger, |
1548 | * and it is safe to read 4k, so we do that | |
1549 | */ | |
1550 | ret = read_disk_sb(rdev, 4096); | |
1da177e4 LT |
1551 | if (ret) return ret; |
1552 | ||
65a06f06 | 1553 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1554 | |
1555 | if (sb->magic != cpu_to_le32(MD_SB_MAGIC) || | |
1556 | sb->major_version != cpu_to_le32(1) || | |
1557 | le32_to_cpu(sb->max_dev) > (4096-256)/2 || | |
0f420358 | 1558 | le64_to_cpu(sb->super_offset) != rdev->sb_start || |
71c0805c | 1559 | (le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0) |
1da177e4 LT |
1560 | return -EINVAL; |
1561 | ||
1562 | if (calc_sb_1_csum(sb) != sb->sb_csum) { | |
9d48739e | 1563 | pr_warn("md: invalid superblock checksum on %s\n", |
1da177e4 LT |
1564 | bdevname(rdev->bdev,b)); |
1565 | return -EINVAL; | |
1566 | } | |
1567 | if (le64_to_cpu(sb->data_size) < 10) { | |
9d48739e N |
1568 | pr_warn("md: data_size too small on %s\n", |
1569 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
1570 | return -EINVAL; |
1571 | } | |
c6563a8c N |
1572 | if (sb->pad0 || |
1573 | sb->pad3[0] || | |
1574 | memcmp(sb->pad3, sb->pad3+1, sizeof(sb->pad3) - sizeof(sb->pad3[1]))) | |
1575 | /* Some padding is non-zero, might be a new feature */ | |
1576 | return -EINVAL; | |
e11e93fa | 1577 | |
1da177e4 LT |
1578 | rdev->preferred_minor = 0xffff; |
1579 | rdev->data_offset = le64_to_cpu(sb->data_offset); | |
c6563a8c N |
1580 | rdev->new_data_offset = rdev->data_offset; |
1581 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE) && | |
1582 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
1583 | rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); | |
4dbcdc75 | 1584 | atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); |
1da177e4 | 1585 | |
0002b271 | 1586 | rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; |
e1defc4f | 1587 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; |
0002b271 | 1588 | if (rdev->sb_size & bmask) |
a1801f85 N |
1589 | rdev->sb_size = (rdev->sb_size | bmask) + 1; |
1590 | ||
1591 | if (minor_version | |
0f420358 | 1592 | && rdev->data_offset < sb_start + (rdev->sb_size/512)) |
a1801f85 | 1593 | return -EINVAL; |
c6563a8c N |
1594 | if (minor_version |
1595 | && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) | |
1596 | return -EINVAL; | |
0002b271 | 1597 | |
31b65a0d N |
1598 | if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) |
1599 | rdev->desc_nr = -1; | |
1600 | else | |
1601 | rdev->desc_nr = le32_to_cpu(sb->dev_number); | |
1602 | ||
2699b672 N |
1603 | if (!rdev->bb_page) { |
1604 | rdev->bb_page = alloc_page(GFP_KERNEL); | |
1605 | if (!rdev->bb_page) | |
1606 | return -ENOMEM; | |
1607 | } | |
1608 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) && | |
1609 | rdev->badblocks.count == 0) { | |
1610 | /* need to load the bad block list. | |
1611 | * Currently we limit it to one page. | |
1612 | */ | |
1613 | s32 offset; | |
1614 | sector_t bb_sector; | |
00485d09 | 1615 | __le64 *bbp; |
2699b672 N |
1616 | int i; |
1617 | int sectors = le16_to_cpu(sb->bblog_size); | |
1618 | if (sectors > (PAGE_SIZE / 512)) | |
1619 | return -EINVAL; | |
1620 | offset = le32_to_cpu(sb->bblog_offset); | |
1621 | if (offset == 0) | |
1622 | return -EINVAL; | |
1623 | bb_sector = (long long)offset; | |
1624 | if (!sync_page_io(rdev, bb_sector, sectors << 9, | |
796a5cf0 | 1625 | rdev->bb_page, REQ_OP_READ, 0, true)) |
2699b672 | 1626 | return -EIO; |
00485d09 | 1627 | bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1628 | rdev->badblocks.shift = sb->bblog_shift; |
1629 | for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) { | |
1630 | u64 bb = le64_to_cpu(*bbp); | |
1631 | int count = bb & (0x3ff); | |
1632 | u64 sector = bb >> 10; | |
1633 | sector <<= sb->bblog_shift; | |
1634 | count <<= sb->bblog_shift; | |
1635 | if (bb + 1 == 0) | |
1636 | break; | |
fc974ee2 | 1637 | if (badblocks_set(&rdev->badblocks, sector, count, 1)) |
2699b672 N |
1638 | return -EINVAL; |
1639 | } | |
486adf72 N |
1640 | } else if (sb->bblog_offset != 0) |
1641 | rdev->badblocks.shift = 0; | |
2699b672 | 1642 | |
ddc08823 PB |
1643 | if ((le32_to_cpu(sb->feature_map) & |
1644 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS))) { | |
ea0213e0 AP |
1645 | rdev->ppl.offset = (__s16)le16_to_cpu(sb->ppl.offset); |
1646 | rdev->ppl.size = le16_to_cpu(sb->ppl.size); | |
1647 | rdev->ppl.sector = rdev->sb_start + rdev->ppl.offset; | |
1648 | } | |
1649 | ||
9a7b2b0f | 1650 | if (!refdev) { |
8ed75463 | 1651 | ret = 1; |
9a7b2b0f | 1652 | } else { |
1da177e4 | 1653 | __u64 ev1, ev2; |
65a06f06 | 1654 | struct mdp_superblock_1 *refsb = page_address(refdev->sb_page); |
1da177e4 LT |
1655 | |
1656 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16) != 0 || | |
1657 | sb->level != refsb->level || | |
1658 | sb->layout != refsb->layout || | |
1659 | sb->chunksize != refsb->chunksize) { | |
9d48739e | 1660 | pr_warn("md: %s has strangely different superblock to %s\n", |
1da177e4 LT |
1661 | bdevname(rdev->bdev,b), |
1662 | bdevname(refdev->bdev,b2)); | |
1663 | return -EINVAL; | |
1664 | } | |
1665 | ev1 = le64_to_cpu(sb->events); | |
1666 | ev2 = le64_to_cpu(refsb->events); | |
1667 | ||
1668 | if (ev1 > ev2) | |
8ed75463 N |
1669 | ret = 1; |
1670 | else | |
1671 | ret = 0; | |
1da177e4 | 1672 | } |
c6563a8c N |
1673 | if (minor_version) { |
1674 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); | |
1675 | sectors -= rdev->data_offset; | |
1676 | } else | |
1677 | sectors = rdev->sb_start; | |
1678 | if (sectors < le64_to_cpu(sb->data_size)) | |
1da177e4 | 1679 | return -EINVAL; |
dd8ac336 | 1680 | rdev->sectors = le64_to_cpu(sb->data_size); |
8ed75463 | 1681 | return ret; |
1da177e4 LT |
1682 | } |
1683 | ||
fd01b88c | 1684 | static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 1685 | { |
65a06f06 | 1686 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
07d84d10 | 1687 | __u64 ev1 = le64_to_cpu(sb->events); |
1da177e4 | 1688 | |
41158c7e | 1689 | rdev->raid_disk = -1; |
c5d79adb N |
1690 | clear_bit(Faulty, &rdev->flags); |
1691 | clear_bit(In_sync, &rdev->flags); | |
8313b8e5 | 1692 | clear_bit(Bitmap_sync, &rdev->flags); |
c5d79adb | 1693 | clear_bit(WriteMostly, &rdev->flags); |
c5d79adb | 1694 | |
1da177e4 LT |
1695 | if (mddev->raid_disks == 0) { |
1696 | mddev->major_version = 1; | |
1697 | mddev->patch_version = 0; | |
e691063a | 1698 | mddev->external = 0; |
9d8f0363 | 1699 | mddev->chunk_sectors = le32_to_cpu(sb->chunksize); |
9ebc6ef1 DD |
1700 | mddev->ctime = le64_to_cpu(sb->ctime); |
1701 | mddev->utime = le64_to_cpu(sb->utime); | |
1da177e4 | 1702 | mddev->level = le32_to_cpu(sb->level); |
d9d166c2 | 1703 | mddev->clevel[0] = 0; |
1da177e4 LT |
1704 | mddev->layout = le32_to_cpu(sb->layout); |
1705 | mddev->raid_disks = le32_to_cpu(sb->raid_disks); | |
58c0fed4 | 1706 | mddev->dev_sectors = le64_to_cpu(sb->size); |
07d84d10 | 1707 | mddev->events = ev1; |
c3d9714e | 1708 | mddev->bitmap_info.offset = 0; |
6409bb05 N |
1709 | mddev->bitmap_info.space = 0; |
1710 | /* Default location for bitmap is 1K after superblock | |
1711 | * using 3K - total of 4K | |
1712 | */ | |
c3d9714e | 1713 | mddev->bitmap_info.default_offset = 1024 >> 9; |
6409bb05 | 1714 | mddev->bitmap_info.default_space = (4096-1024) >> 9; |
2c810cdd N |
1715 | mddev->reshape_backwards = 0; |
1716 | ||
1da177e4 LT |
1717 | mddev->recovery_cp = le64_to_cpu(sb->resync_offset); |
1718 | memcpy(mddev->uuid, sb->set_uuid, 16); | |
1719 | ||
1720 | mddev->max_disks = (4096-256)/2; | |
a654b9d8 | 1721 | |
71c0805c | 1722 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) && |
6409bb05 | 1723 | mddev->bitmap_info.file == NULL) { |
c3d9714e N |
1724 | mddev->bitmap_info.offset = |
1725 | (__s32)le32_to_cpu(sb->bitmap_offset); | |
6409bb05 N |
1726 | /* Metadata doesn't record how much space is available. |
1727 | * For 1.0, we assume we can use up to the superblock | |
1728 | * if before, else to 4K beyond superblock. | |
1729 | * For others, assume no change is possible. | |
1730 | */ | |
1731 | if (mddev->minor_version > 0) | |
1732 | mddev->bitmap_info.space = 0; | |
1733 | else if (mddev->bitmap_info.offset > 0) | |
1734 | mddev->bitmap_info.space = | |
1735 | 8 - mddev->bitmap_info.offset; | |
1736 | else | |
1737 | mddev->bitmap_info.space = | |
1738 | -mddev->bitmap_info.offset; | |
1739 | } | |
e11e93fa | 1740 | |
f6705578 N |
1741 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { |
1742 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); | |
1743 | mddev->delta_disks = le32_to_cpu(sb->delta_disks); | |
1744 | mddev->new_level = le32_to_cpu(sb->new_level); | |
1745 | mddev->new_layout = le32_to_cpu(sb->new_layout); | |
664e7c41 | 1746 | mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk); |
2c810cdd N |
1747 | if (mddev->delta_disks < 0 || |
1748 | (mddev->delta_disks == 0 && | |
1749 | (le32_to_cpu(sb->feature_map) | |
1750 | & MD_FEATURE_RESHAPE_BACKWARDS))) | |
1751 | mddev->reshape_backwards = 1; | |
f6705578 N |
1752 | } else { |
1753 | mddev->reshape_position = MaxSector; | |
1754 | mddev->delta_disks = 0; | |
1755 | mddev->new_level = mddev->level; | |
1756 | mddev->new_layout = mddev->layout; | |
664e7c41 | 1757 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
1758 | } |
1759 | ||
486b0f7b | 1760 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL) |
a62ab49e | 1761 | set_bit(MD_HAS_JOURNAL, &mddev->flags); |
ea0213e0 | 1762 | |
ddc08823 PB |
1763 | if (le32_to_cpu(sb->feature_map) & |
1764 | (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)) { | |
ea0213e0 AP |
1765 | if (le32_to_cpu(sb->feature_map) & |
1766 | (MD_FEATURE_BITMAP_OFFSET | MD_FEATURE_JOURNAL)) | |
1767 | return -EINVAL; | |
ddc08823 PB |
1768 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_PPL) && |
1769 | (le32_to_cpu(sb->feature_map) & | |
1770 | MD_FEATURE_MULTIPLE_PPLS)) | |
1771 | return -EINVAL; | |
ea0213e0 AP |
1772 | set_bit(MD_HAS_PPL, &mddev->flags); |
1773 | } | |
41158c7e | 1774 | } else if (mddev->pers == NULL) { |
be6800a7 N |
1775 | /* Insist of good event counter while assembling, except for |
1776 | * spares (which don't need an event count) */ | |
1da177e4 | 1777 | ++ev1; |
be6800a7 N |
1778 | if (rdev->desc_nr >= 0 && |
1779 | rdev->desc_nr < le32_to_cpu(sb->max_dev) && | |
a3dfbdaa SL |
1780 | (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || |
1781 | le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) | |
be6800a7 N |
1782 | if (ev1 < mddev->events) |
1783 | return -EINVAL; | |
41158c7e N |
1784 | } else if (mddev->bitmap) { |
1785 | /* If adding to array with a bitmap, then we can accept an | |
1786 | * older device, but not too old. | |
1787 | */ | |
41158c7e N |
1788 | if (ev1 < mddev->bitmap->events_cleared) |
1789 | return 0; | |
8313b8e5 N |
1790 | if (ev1 < mddev->events) |
1791 | set_bit(Bitmap_sync, &rdev->flags); | |
07d84d10 N |
1792 | } else { |
1793 | if (ev1 < mddev->events) | |
1794 | /* just a hot-add of a new device, leave raid_disk at -1 */ | |
1795 | return 0; | |
1796 | } | |
1da177e4 LT |
1797 | if (mddev->level != LEVEL_MULTIPATH) { |
1798 | int role; | |
3673f305 N |
1799 | if (rdev->desc_nr < 0 || |
1800 | rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { | |
c4d4c91b | 1801 | role = MD_DISK_ROLE_SPARE; |
3673f305 N |
1802 | rdev->desc_nr = -1; |
1803 | } else | |
1804 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
1da177e4 | 1805 | switch(role) { |
c4d4c91b | 1806 | case MD_DISK_ROLE_SPARE: /* spare */ |
1da177e4 | 1807 | break; |
c4d4c91b | 1808 | case MD_DISK_ROLE_FAULTY: /* faulty */ |
b2d444d7 | 1809 | set_bit(Faulty, &rdev->flags); |
1da177e4 | 1810 | break; |
bac624f3 SL |
1811 | case MD_DISK_ROLE_JOURNAL: /* journal device */ |
1812 | if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { | |
1813 | /* journal device without journal feature */ | |
9d48739e | 1814 | pr_warn("md: journal device provided without journal feature, ignoring the device\n"); |
bac624f3 SL |
1815 | return -EINVAL; |
1816 | } | |
1817 | set_bit(Journal, &rdev->flags); | |
3069aa8d | 1818 | rdev->journal_tail = le64_to_cpu(sb->journal_tail); |
9b15603d | 1819 | rdev->raid_disk = 0; |
bac624f3 | 1820 | break; |
1da177e4 | 1821 | default: |
f466722c | 1822 | rdev->saved_raid_disk = role; |
5fd6c1dc | 1823 | if ((le32_to_cpu(sb->feature_map) & |
f466722c | 1824 | MD_FEATURE_RECOVERY_OFFSET)) { |
5fd6c1dc | 1825 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); |
f466722c N |
1826 | if (!(le32_to_cpu(sb->feature_map) & |
1827 | MD_FEATURE_RECOVERY_BITMAP)) | |
1828 | rdev->saved_raid_disk = -1; | |
1829 | } else | |
5fd6c1dc | 1830 | set_bit(In_sync, &rdev->flags); |
1da177e4 LT |
1831 | rdev->raid_disk = role; |
1832 | break; | |
1833 | } | |
8ddf9efe N |
1834 | if (sb->devflags & WriteMostly1) |
1835 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
1836 | if (sb->devflags & FailFast1) |
1837 | set_bit(FailFast, &rdev->flags); | |
2d78f8c4 N |
1838 | if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) |
1839 | set_bit(Replacement, &rdev->flags); | |
41158c7e | 1840 | } else /* MULTIPATH are always insync */ |
b2d444d7 | 1841 | set_bit(In_sync, &rdev->flags); |
41158c7e | 1842 | |
1da177e4 LT |
1843 | return 0; |
1844 | } | |
1845 | ||
fd01b88c | 1846 | static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 LT |
1847 | { |
1848 | struct mdp_superblock_1 *sb; | |
3cb03002 | 1849 | struct md_rdev *rdev2; |
1da177e4 LT |
1850 | int max_dev, i; |
1851 | /* make rdev->sb match mddev and rdev data. */ | |
1852 | ||
65a06f06 | 1853 | sb = page_address(rdev->sb_page); |
1da177e4 LT |
1854 | |
1855 | sb->feature_map = 0; | |
1856 | sb->pad0 = 0; | |
5fd6c1dc | 1857 | sb->recovery_offset = cpu_to_le64(0); |
1da177e4 LT |
1858 | memset(sb->pad3, 0, sizeof(sb->pad3)); |
1859 | ||
1860 | sb->utime = cpu_to_le64((__u64)mddev->utime); | |
1861 | sb->events = cpu_to_le64(mddev->events); | |
1862 | if (mddev->in_sync) | |
1863 | sb->resync_offset = cpu_to_le64(mddev->recovery_cp); | |
bd18f646 SL |
1864 | else if (test_bit(MD_JOURNAL_CLEAN, &mddev->flags)) |
1865 | sb->resync_offset = cpu_to_le64(MaxSector); | |
1da177e4 LT |
1866 | else |
1867 | sb->resync_offset = cpu_to_le64(0); | |
1868 | ||
1c05b4bc | 1869 | sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors)); |
4dbcdc75 | 1870 | |
f0ca340c | 1871 | sb->raid_disks = cpu_to_le32(mddev->raid_disks); |
58c0fed4 | 1872 | sb->size = cpu_to_le64(mddev->dev_sectors); |
9d8f0363 | 1873 | sb->chunksize = cpu_to_le32(mddev->chunk_sectors); |
62e1e389 N |
1874 | sb->level = cpu_to_le32(mddev->level); |
1875 | sb->layout = cpu_to_le32(mddev->layout); | |
688834e6 N |
1876 | if (test_bit(FailFast, &rdev->flags)) |
1877 | sb->devflags |= FailFast1; | |
1878 | else | |
1879 | sb->devflags &= ~FailFast1; | |
f0ca340c | 1880 | |
aeb9b211 N |
1881 | if (test_bit(WriteMostly, &rdev->flags)) |
1882 | sb->devflags |= WriteMostly1; | |
1883 | else | |
1884 | sb->devflags &= ~WriteMostly1; | |
c6563a8c N |
1885 | sb->data_offset = cpu_to_le64(rdev->data_offset); |
1886 | sb->data_size = cpu_to_le64(rdev->sectors); | |
aeb9b211 | 1887 | |
c3d9714e N |
1888 | if (mddev->bitmap && mddev->bitmap_info.file == NULL) { |
1889 | sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); | |
71c0805c | 1890 | sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
a654b9d8 | 1891 | } |
5fd6c1dc | 1892 | |
f2076e7d | 1893 | if (rdev->raid_disk >= 0 && !test_bit(Journal, &rdev->flags) && |
97e4f42d | 1894 | !test_bit(In_sync, &rdev->flags)) { |
93be75ff N |
1895 | sb->feature_map |= |
1896 | cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET); | |
1897 | sb->recovery_offset = | |
1898 | cpu_to_le64(rdev->recovery_offset); | |
f466722c N |
1899 | if (rdev->saved_raid_disk >= 0 && mddev->bitmap) |
1900 | sb->feature_map |= | |
1901 | cpu_to_le32(MD_FEATURE_RECOVERY_BITMAP); | |
5fd6c1dc | 1902 | } |
3069aa8d SL |
1903 | /* Note: recovery_offset and journal_tail share space */ |
1904 | if (test_bit(Journal, &rdev->flags)) | |
1905 | sb->journal_tail = cpu_to_le64(rdev->journal_tail); | |
2d78f8c4 N |
1906 | if (test_bit(Replacement, &rdev->flags)) |
1907 | sb->feature_map |= | |
1908 | cpu_to_le32(MD_FEATURE_REPLACEMENT); | |
5fd6c1dc | 1909 | |
f6705578 N |
1910 | if (mddev->reshape_position != MaxSector) { |
1911 | sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1912 | sb->reshape_position = cpu_to_le64(mddev->reshape_position); | |
1913 | sb->new_layout = cpu_to_le32(mddev->new_layout); | |
1914 | sb->delta_disks = cpu_to_le32(mddev->delta_disks); | |
1915 | sb->new_level = cpu_to_le32(mddev->new_level); | |
664e7c41 | 1916 | sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors); |
2c810cdd N |
1917 | if (mddev->delta_disks == 0 && |
1918 | mddev->reshape_backwards) | |
1919 | sb->feature_map | |
1920 | |= cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
c6563a8c N |
1921 | if (rdev->new_data_offset != rdev->data_offset) { |
1922 | sb->feature_map | |
1923 | |= cpu_to_le32(MD_FEATURE_NEW_OFFSET); | |
1924 | sb->new_offset = cpu_to_le32((__u32)(rdev->new_data_offset | |
1925 | - rdev->data_offset)); | |
1926 | } | |
f6705578 | 1927 | } |
a654b9d8 | 1928 | |
3c462c88 GR |
1929 | if (mddev_is_clustered(mddev)) |
1930 | sb->feature_map |= cpu_to_le32(MD_FEATURE_CLUSTERED); | |
1931 | ||
2699b672 N |
1932 | if (rdev->badblocks.count == 0) |
1933 | /* Nothing to do for bad blocks*/ ; | |
1934 | else if (sb->bblog_offset == 0) | |
1935 | /* Cannot record bad blocks on this device */ | |
1936 | md_error(mddev, rdev); | |
1937 | else { | |
1938 | struct badblocks *bb = &rdev->badblocks; | |
ae50640b | 1939 | __le64 *bbp = (__le64 *)page_address(rdev->bb_page); |
2699b672 N |
1940 | u64 *p = bb->page; |
1941 | sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1942 | if (bb->changed) { | |
1943 | unsigned seq; | |
1944 | ||
1945 | retry: | |
1946 | seq = read_seqbegin(&bb->lock); | |
1947 | ||
1948 | memset(bbp, 0xff, PAGE_SIZE); | |
1949 | ||
1950 | for (i = 0 ; i < bb->count ; i++) { | |
35f9ac2d | 1951 | u64 internal_bb = p[i]; |
2699b672 N |
1952 | u64 store_bb = ((BB_OFFSET(internal_bb) << 10) |
1953 | | BB_LEN(internal_bb)); | |
35f9ac2d | 1954 | bbp[i] = cpu_to_le64(store_bb); |
2699b672 | 1955 | } |
d0962936 | 1956 | bb->changed = 0; |
2699b672 N |
1957 | if (read_seqretry(&bb->lock, seq)) |
1958 | goto retry; | |
1959 | ||
1960 | bb->sector = (rdev->sb_start + | |
1961 | (int)le32_to_cpu(sb->bblog_offset)); | |
1962 | bb->size = le16_to_cpu(sb->bblog_size); | |
2699b672 N |
1963 | } |
1964 | } | |
1965 | ||
1da177e4 | 1966 | max_dev = 0; |
dafb20fa | 1967 | rdev_for_each(rdev2, mddev) |
1da177e4 LT |
1968 | if (rdev2->desc_nr+1 > max_dev) |
1969 | max_dev = rdev2->desc_nr+1; | |
a778b73f | 1970 | |
70471daf N |
1971 | if (max_dev > le32_to_cpu(sb->max_dev)) { |
1972 | int bmask; | |
a778b73f | 1973 | sb->max_dev = cpu_to_le32(max_dev); |
70471daf N |
1974 | rdev->sb_size = max_dev * 2 + 256; |
1975 | bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; | |
1976 | if (rdev->sb_size & bmask) | |
1977 | rdev->sb_size = (rdev->sb_size | bmask) + 1; | |
ddcf3522 N |
1978 | } else |
1979 | max_dev = le32_to_cpu(sb->max_dev); | |
1980 | ||
1da177e4 | 1981 | for (i=0; i<max_dev;i++) |
8df72024 | 1982 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
f72ffdd6 | 1983 | |
a97b7896 SL |
1984 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) |
1985 | sb->feature_map |= cpu_to_le32(MD_FEATURE_JOURNAL); | |
f72ffdd6 | 1986 | |
ea0213e0 | 1987 | if (test_bit(MD_HAS_PPL, &mddev->flags)) { |
ddc08823 PB |
1988 | if (test_bit(MD_HAS_MULTIPLE_PPLS, &mddev->flags)) |
1989 | sb->feature_map |= | |
1990 | cpu_to_le32(MD_FEATURE_MULTIPLE_PPLS); | |
1991 | else | |
1992 | sb->feature_map |= cpu_to_le32(MD_FEATURE_PPL); | |
ea0213e0 AP |
1993 | sb->ppl.offset = cpu_to_le16(rdev->ppl.offset); |
1994 | sb->ppl.size = cpu_to_le16(rdev->ppl.size); | |
1995 | } | |
1996 | ||
dafb20fa | 1997 | rdev_for_each(rdev2, mddev) { |
1da177e4 | 1998 | i = rdev2->desc_nr; |
b2d444d7 | 1999 | if (test_bit(Faulty, &rdev2->flags)) |
c4d4c91b | 2000 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY); |
b2d444d7 | 2001 | else if (test_bit(In_sync, &rdev2->flags)) |
1da177e4 | 2002 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
a97b7896 | 2003 | else if (test_bit(Journal, &rdev2->flags)) |
bac624f3 | 2004 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_JOURNAL); |
93be75ff | 2005 | else if (rdev2->raid_disk >= 0) |
5fd6c1dc | 2006 | sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk); |
1da177e4 | 2007 | else |
c4d4c91b | 2008 | sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE); |
1da177e4 LT |
2009 | } |
2010 | ||
1da177e4 LT |
2011 | sb->sb_csum = calc_sb_1_csum(sb); |
2012 | } | |
2013 | ||
0cd17fec | 2014 | static unsigned long long |
3cb03002 | 2015 | super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) |
0cd17fec CW |
2016 | { |
2017 | struct mdp_superblock_1 *sb; | |
15f4a5fd | 2018 | sector_t max_sectors; |
58c0fed4 | 2019 | if (num_sectors && num_sectors < rdev->mddev->dev_sectors) |
0cd17fec | 2020 | return 0; /* component must fit device */ |
c6563a8c N |
2021 | if (rdev->data_offset != rdev->new_data_offset) |
2022 | return 0; /* too confusing */ | |
0f420358 | 2023 | if (rdev->sb_start < rdev->data_offset) { |
0cd17fec | 2024 | /* minor versions 1 and 2; superblock before data */ |
77304d2a | 2025 | max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; |
15f4a5fd AN |
2026 | max_sectors -= rdev->data_offset; |
2027 | if (!num_sectors || num_sectors > max_sectors) | |
2028 | num_sectors = max_sectors; | |
c3d9714e | 2029 | } else if (rdev->mddev->bitmap_info.offset) { |
0cd17fec CW |
2030 | /* minor version 0 with bitmap we can't move */ |
2031 | return 0; | |
2032 | } else { | |
2033 | /* minor version 0; superblock after data */ | |
0f420358 | 2034 | sector_t sb_start; |
77304d2a | 2035 | sb_start = (i_size_read(rdev->bdev->bd_inode) >> 9) - 8*2; |
0f420358 | 2036 | sb_start &= ~(sector_t)(4*2 - 1); |
dd8ac336 | 2037 | max_sectors = rdev->sectors + sb_start - rdev->sb_start; |
15f4a5fd AN |
2038 | if (!num_sectors || num_sectors > max_sectors) |
2039 | num_sectors = max_sectors; | |
0f420358 | 2040 | rdev->sb_start = sb_start; |
0cd17fec | 2041 | } |
65a06f06 | 2042 | sb = page_address(rdev->sb_page); |
15f4a5fd | 2043 | sb->data_size = cpu_to_le64(num_sectors); |
3fb632e4 | 2044 | sb->super_offset = cpu_to_le64(rdev->sb_start); |
0cd17fec | 2045 | sb->sb_csum = calc_sb_1_csum(sb); |
46533ff7 N |
2046 | do { |
2047 | md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size, | |
2048 | rdev->sb_page); | |
2049 | } while (md_super_wait(rdev->mddev) < 0); | |
c26a44ed | 2050 | return num_sectors; |
c6563a8c N |
2051 | |
2052 | } | |
2053 | ||
2054 | static int | |
2055 | super_1_allow_new_offset(struct md_rdev *rdev, | |
2056 | unsigned long long new_offset) | |
2057 | { | |
2058 | /* All necessary checks on new >= old have been done */ | |
2059 | struct bitmap *bitmap; | |
2060 | if (new_offset >= rdev->data_offset) | |
2061 | return 1; | |
2062 | ||
2063 | /* with 1.0 metadata, there is no metadata to tread on | |
2064 | * so we can always move back */ | |
2065 | if (rdev->mddev->minor_version == 0) | |
2066 | return 1; | |
2067 | ||
2068 | /* otherwise we must be sure not to step on | |
2069 | * any metadata, so stay: | |
2070 | * 36K beyond start of superblock | |
2071 | * beyond end of badblocks | |
2072 | * beyond write-intent bitmap | |
2073 | */ | |
2074 | if (rdev->sb_start + (32+4)*2 > new_offset) | |
2075 | return 0; | |
2076 | bitmap = rdev->mddev->bitmap; | |
2077 | if (bitmap && !rdev->mddev->bitmap_info.file && | |
2078 | rdev->sb_start + rdev->mddev->bitmap_info.offset + | |
1ec885cd | 2079 | bitmap->storage.file_pages * (PAGE_SIZE>>9) > new_offset) |
c6563a8c N |
2080 | return 0; |
2081 | if (rdev->badblocks.sector + rdev->badblocks.size > new_offset) | |
2082 | return 0; | |
2083 | ||
2084 | return 1; | |
0cd17fec | 2085 | } |
1da177e4 | 2086 | |
75c96f85 | 2087 | static struct super_type super_types[] = { |
1da177e4 LT |
2088 | [0] = { |
2089 | .name = "0.90.0", | |
2090 | .owner = THIS_MODULE, | |
0cd17fec CW |
2091 | .load_super = super_90_load, |
2092 | .validate_super = super_90_validate, | |
2093 | .sync_super = super_90_sync, | |
2094 | .rdev_size_change = super_90_rdev_size_change, | |
c6563a8c | 2095 | .allow_new_offset = super_90_allow_new_offset, |
1da177e4 LT |
2096 | }, |
2097 | [1] = { | |
2098 | .name = "md-1", | |
2099 | .owner = THIS_MODULE, | |
0cd17fec CW |
2100 | .load_super = super_1_load, |
2101 | .validate_super = super_1_validate, | |
2102 | .sync_super = super_1_sync, | |
2103 | .rdev_size_change = super_1_rdev_size_change, | |
c6563a8c | 2104 | .allow_new_offset = super_1_allow_new_offset, |
1da177e4 LT |
2105 | }, |
2106 | }; | |
1da177e4 | 2107 | |
fd01b88c | 2108 | static void sync_super(struct mddev *mddev, struct md_rdev *rdev) |
076f968b JB |
2109 | { |
2110 | if (mddev->sync_super) { | |
2111 | mddev->sync_super(mddev, rdev); | |
2112 | return; | |
2113 | } | |
2114 | ||
2115 | BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types)); | |
2116 | ||
2117 | super_types[mddev->major_version].sync_super(mddev, rdev); | |
2118 | } | |
2119 | ||
fd01b88c | 2120 | static int match_mddev_units(struct mddev *mddev1, struct mddev *mddev2) |
1da177e4 | 2121 | { |
3cb03002 | 2122 | struct md_rdev *rdev, *rdev2; |
1da177e4 | 2123 | |
4b80991c | 2124 | rcu_read_lock(); |
0b020e85 SL |
2125 | rdev_for_each_rcu(rdev, mddev1) { |
2126 | if (test_bit(Faulty, &rdev->flags) || | |
2127 | test_bit(Journal, &rdev->flags) || | |
2128 | rdev->raid_disk == -1) | |
2129 | continue; | |
2130 | rdev_for_each_rcu(rdev2, mddev2) { | |
2131 | if (test_bit(Faulty, &rdev2->flags) || | |
2132 | test_bit(Journal, &rdev2->flags) || | |
2133 | rdev2->raid_disk == -1) | |
2134 | continue; | |
7dd5e7c3 | 2135 | if (rdev->bdev->bd_contains == |
4b80991c N |
2136 | rdev2->bdev->bd_contains) { |
2137 | rcu_read_unlock(); | |
7dd5e7c3 | 2138 | return 1; |
4b80991c | 2139 | } |
0b020e85 SL |
2140 | } |
2141 | } | |
4b80991c | 2142 | rcu_read_unlock(); |
1da177e4 LT |
2143 | return 0; |
2144 | } | |
2145 | ||
2146 | static LIST_HEAD(pending_raid_disks); | |
2147 | ||
ac5e7113 AN |
2148 | /* |
2149 | * Try to register data integrity profile for an mddev | |
2150 | * | |
2151 | * This is called when an array is started and after a disk has been kicked | |
2152 | * from the array. It only succeeds if all working and active component devices | |
2153 | * are integrity capable with matching profiles. | |
2154 | */ | |
fd01b88c | 2155 | int md_integrity_register(struct mddev *mddev) |
ac5e7113 | 2156 | { |
3cb03002 | 2157 | struct md_rdev *rdev, *reference = NULL; |
ac5e7113 AN |
2158 | |
2159 | if (list_empty(&mddev->disks)) | |
2160 | return 0; /* nothing to do */ | |
629acb6a JB |
2161 | if (!mddev->gendisk || blk_get_integrity(mddev->gendisk)) |
2162 | return 0; /* shouldn't register, or already is */ | |
dafb20fa | 2163 | rdev_for_each(rdev, mddev) { |
ac5e7113 AN |
2164 | /* skip spares and non-functional disks */ |
2165 | if (test_bit(Faulty, &rdev->flags)) | |
2166 | continue; | |
2167 | if (rdev->raid_disk < 0) | |
2168 | continue; | |
ac5e7113 AN |
2169 | if (!reference) { |
2170 | /* Use the first rdev as the reference */ | |
2171 | reference = rdev; | |
2172 | continue; | |
2173 | } | |
2174 | /* does this rdev's profile match the reference profile? */ | |
2175 | if (blk_integrity_compare(reference->bdev->bd_disk, | |
2176 | rdev->bdev->bd_disk) < 0) | |
2177 | return -EINVAL; | |
2178 | } | |
89078d57 MP |
2179 | if (!reference || !bdev_get_integrity(reference->bdev)) |
2180 | return 0; | |
ac5e7113 AN |
2181 | /* |
2182 | * All component devices are integrity capable and have matching | |
2183 | * profiles, register the common profile for the md device. | |
2184 | */ | |
25520d55 MP |
2185 | blk_integrity_register(mddev->gendisk, |
2186 | bdev_get_integrity(reference->bdev)); | |
2187 | ||
9d48739e | 2188 | pr_debug("md: data integrity enabled on %s\n", mdname(mddev)); |
afeee514 | 2189 | if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE)) { |
9d48739e | 2190 | pr_err("md: failed to create integrity pool for %s\n", |
a91a2785 MP |
2191 | mdname(mddev)); |
2192 | return -EINVAL; | |
2193 | } | |
ac5e7113 AN |
2194 | return 0; |
2195 | } | |
2196 | EXPORT_SYMBOL(md_integrity_register); | |
2197 | ||
1501efad DW |
2198 | /* |
2199 | * Attempt to add an rdev, but only if it is consistent with the current | |
2200 | * integrity profile | |
2201 | */ | |
2202 | int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev) | |
3f9d99c1 | 2203 | { |
2863b9eb | 2204 | struct blk_integrity *bi_mddev; |
1501efad | 2205 | char name[BDEVNAME_SIZE]; |
2863b9eb JB |
2206 | |
2207 | if (!mddev->gendisk) | |
1501efad | 2208 | return 0; |
2863b9eb | 2209 | |
2863b9eb | 2210 | bi_mddev = blk_get_integrity(mddev->gendisk); |
3f9d99c1 | 2211 | |
ac5e7113 | 2212 | if (!bi_mddev) /* nothing to do */ |
1501efad DW |
2213 | return 0; |
2214 | ||
2215 | if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) { | |
9d48739e N |
2216 | pr_err("%s: incompatible integrity profile for %s\n", |
2217 | mdname(mddev), bdevname(rdev->bdev, name)); | |
1501efad DW |
2218 | return -ENXIO; |
2219 | } | |
2220 | ||
2221 | return 0; | |
3f9d99c1 | 2222 | } |
ac5e7113 | 2223 | EXPORT_SYMBOL(md_integrity_add_rdev); |
3f9d99c1 | 2224 | |
f72ffdd6 | 2225 | static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) |
1da177e4 | 2226 | { |
7dd5e7c3 | 2227 | char b[BDEVNAME_SIZE]; |
f637b9f9 | 2228 | struct kobject *ko; |
5e55e2f5 | 2229 | int err; |
1da177e4 | 2230 | |
11e2ede0 DW |
2231 | /* prevent duplicates */ |
2232 | if (find_rdev(mddev, rdev->bdev->bd_dev)) | |
2233 | return -EEXIST; | |
2234 | ||
97b20ef7 N |
2235 | if ((bdev_read_only(rdev->bdev) || bdev_read_only(rdev->meta_bdev)) && |
2236 | mddev->pers) | |
2237 | return -EROFS; | |
2238 | ||
dd8ac336 | 2239 | /* make sure rdev->sectors exceeds mddev->dev_sectors */ |
f6b6ec5c SL |
2240 | if (!test_bit(Journal, &rdev->flags) && |
2241 | rdev->sectors && | |
2242 | (mddev->dev_sectors == 0 || rdev->sectors < mddev->dev_sectors)) { | |
a778b73f N |
2243 | if (mddev->pers) { |
2244 | /* Cannot change size, so fail | |
2245 | * If mddev->level <= 0, then we don't care | |
2246 | * about aligning sizes (e.g. linear) | |
2247 | */ | |
2248 | if (mddev->level > 0) | |
2249 | return -ENOSPC; | |
2250 | } else | |
dd8ac336 | 2251 | mddev->dev_sectors = rdev->sectors; |
2bf071bf | 2252 | } |
1da177e4 LT |
2253 | |
2254 | /* Verify rdev->desc_nr is unique. | |
2255 | * If it is -1, assign a free number, else | |
2256 | * check number is not in use | |
2257 | */ | |
4878e9eb | 2258 | rcu_read_lock(); |
1da177e4 LT |
2259 | if (rdev->desc_nr < 0) { |
2260 | int choice = 0; | |
4878e9eb N |
2261 | if (mddev->pers) |
2262 | choice = mddev->raid_disks; | |
57d051dc | 2263 | while (md_find_rdev_nr_rcu(mddev, choice)) |
1da177e4 LT |
2264 | choice++; |
2265 | rdev->desc_nr = choice; | |
2266 | } else { | |
57d051dc | 2267 | if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) { |
4878e9eb | 2268 | rcu_read_unlock(); |
1da177e4 | 2269 | return -EBUSY; |
4878e9eb | 2270 | } |
1da177e4 | 2271 | } |
4878e9eb | 2272 | rcu_read_unlock(); |
f6b6ec5c SL |
2273 | if (!test_bit(Journal, &rdev->flags) && |
2274 | mddev->max_disks && rdev->desc_nr >= mddev->max_disks) { | |
9d48739e N |
2275 | pr_warn("md: %s: array is limited to %d devices\n", |
2276 | mdname(mddev), mddev->max_disks); | |
de01dfad N |
2277 | return -EBUSY; |
2278 | } | |
19133a42 | 2279 | bdevname(rdev->bdev,b); |
90a9befb | 2280 | strreplace(b, '/', '!'); |
649316b2 | 2281 | |
1da177e4 | 2282 | rdev->mddev = mddev; |
9d48739e | 2283 | pr_debug("md: bind<%s>\n", b); |
86e6ffdd | 2284 | |
963c555e GJ |
2285 | if (mddev->raid_disks) |
2286 | mddev_create_wb_pool(mddev, rdev, false); | |
2287 | ||
b2d6db58 | 2288 | if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) |
5e55e2f5 | 2289 | goto fail; |
86e6ffdd | 2290 | |
0762b8bd | 2291 | ko = &part_to_dev(rdev->bdev->bd_part)->kobj; |
00bcb4ac N |
2292 | if (sysfs_create_link(&rdev->kobj, ko, "block")) |
2293 | /* failure here is OK */; | |
2294 | rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); | |
3c0ee63a | 2295 | |
4b80991c | 2296 | list_add_rcu(&rdev->same_set, &mddev->disks); |
e09b457b | 2297 | bd_link_disk_holder(rdev->bdev, mddev->gendisk); |
4044ba58 N |
2298 | |
2299 | /* May as well allow recovery to be retried once */ | |
5389042f | 2300 | mddev->recovery_disabled++; |
3f9d99c1 | 2301 | |
1da177e4 | 2302 | return 0; |
5e55e2f5 N |
2303 | |
2304 | fail: | |
9d48739e N |
2305 | pr_warn("md: failed to register dev-%s for %s\n", |
2306 | b, mdname(mddev)); | |
5e55e2f5 | 2307 | return err; |
1da177e4 LT |
2308 | } |
2309 | ||
177a99b2 | 2310 | static void md_delayed_delete(struct work_struct *ws) |
5792a285 | 2311 | { |
3cb03002 | 2312 | struct md_rdev *rdev = container_of(ws, struct md_rdev, del_work); |
5792a285 | 2313 | kobject_del(&rdev->kobj); |
177a99b2 | 2314 | kobject_put(&rdev->kobj); |
5792a285 N |
2315 | } |
2316 | ||
f72ffdd6 | 2317 | static void unbind_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2318 | { |
2319 | char b[BDEVNAME_SIZE]; | |
403df478 | 2320 | |
49731baa | 2321 | bd_unlink_disk_holder(rdev->bdev, rdev->mddev->gendisk); |
4b80991c | 2322 | list_del_rcu(&rdev->same_set); |
9d48739e | 2323 | pr_debug("md: unbind<%s>\n", bdevname(rdev->bdev,b)); |
963c555e | 2324 | mddev_destroy_wb_pool(rdev->mddev, rdev); |
1da177e4 | 2325 | rdev->mddev = NULL; |
86e6ffdd | 2326 | sysfs_remove_link(&rdev->kobj, "block"); |
3c0ee63a N |
2327 | sysfs_put(rdev->sysfs_state); |
2328 | rdev->sysfs_state = NULL; | |
2230dfe4 | 2329 | rdev->badblocks.count = 0; |
5792a285 | 2330 | /* We need to delay this, otherwise we can deadlock when |
4b80991c N |
2331 | * writing to 'remove' to "dev/state". We also need |
2332 | * to delay it due to rcu usage. | |
5792a285 | 2333 | */ |
4b80991c | 2334 | synchronize_rcu(); |
177a99b2 N |
2335 | INIT_WORK(&rdev->del_work, md_delayed_delete); |
2336 | kobject_get(&rdev->kobj); | |
e804ac78 | 2337 | queue_work(md_misc_wq, &rdev->del_work); |
1da177e4 LT |
2338 | } |
2339 | ||
2340 | /* | |
2341 | * prevent the device from being mounted, repartitioned or | |
2342 | * otherwise reused by a RAID array (or any other kernel | |
2343 | * subsystem), by bd_claiming the device. | |
2344 | */ | |
3cb03002 | 2345 | static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared) |
1da177e4 LT |
2346 | { |
2347 | int err = 0; | |
2348 | struct block_device *bdev; | |
2349 | char b[BDEVNAME_SIZE]; | |
2350 | ||
d4d77629 | 2351 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
3cb03002 | 2352 | shared ? (struct md_rdev *)lock_rdev : rdev); |
1da177e4 | 2353 | if (IS_ERR(bdev)) { |
9d48739e | 2354 | pr_warn("md: could not open %s.\n", __bdevname(dev, b)); |
1da177e4 LT |
2355 | return PTR_ERR(bdev); |
2356 | } | |
1da177e4 LT |
2357 | rdev->bdev = bdev; |
2358 | return err; | |
2359 | } | |
2360 | ||
3cb03002 | 2361 | static void unlock_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2362 | { |
2363 | struct block_device *bdev = rdev->bdev; | |
2364 | rdev->bdev = NULL; | |
e525fd89 | 2365 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
2366 | } |
2367 | ||
2368 | void md_autodetect_dev(dev_t dev); | |
2369 | ||
f72ffdd6 | 2370 | static void export_rdev(struct md_rdev *rdev) |
1da177e4 LT |
2371 | { |
2372 | char b[BDEVNAME_SIZE]; | |
403df478 | 2373 | |
9d48739e | 2374 | pr_debug("md: export_rdev(%s)\n", bdevname(rdev->bdev,b)); |
545c8795 | 2375 | md_rdev_clear(rdev); |
1da177e4 | 2376 | #ifndef MODULE |
d0fae18f N |
2377 | if (test_bit(AutoDetected, &rdev->flags)) |
2378 | md_autodetect_dev(rdev->bdev->bd_dev); | |
1da177e4 LT |
2379 | #endif |
2380 | unlock_rdev(rdev); | |
86e6ffdd | 2381 | kobject_put(&rdev->kobj); |
1da177e4 LT |
2382 | } |
2383 | ||
fb56dfef | 2384 | void md_kick_rdev_from_array(struct md_rdev *rdev) |
1da177e4 LT |
2385 | { |
2386 | unbind_rdev_from_array(rdev); | |
2387 | export_rdev(rdev); | |
2388 | } | |
fb56dfef | 2389 | EXPORT_SYMBOL_GPL(md_kick_rdev_from_array); |
1da177e4 | 2390 | |
fd01b88c | 2391 | static void export_array(struct mddev *mddev) |
1da177e4 | 2392 | { |
0638bb0e | 2393 | struct md_rdev *rdev; |
1da177e4 | 2394 | |
0638bb0e N |
2395 | while (!list_empty(&mddev->disks)) { |
2396 | rdev = list_first_entry(&mddev->disks, struct md_rdev, | |
2397 | same_set); | |
fb56dfef | 2398 | md_kick_rdev_from_array(rdev); |
1da177e4 | 2399 | } |
1da177e4 LT |
2400 | mddev->raid_disks = 0; |
2401 | mddev->major_version = 0; | |
2402 | } | |
2403 | ||
6497709b N |
2404 | static bool set_in_sync(struct mddev *mddev) |
2405 | { | |
efa4b77b | 2406 | lockdep_assert_held(&mddev->lock); |
4ad23a97 N |
2407 | if (!mddev->in_sync) { |
2408 | mddev->sync_checkers++; | |
2409 | spin_unlock(&mddev->lock); | |
2410 | percpu_ref_switch_to_atomic_sync(&mddev->writes_pending); | |
2411 | spin_lock(&mddev->lock); | |
2412 | if (!mddev->in_sync && | |
2413 | percpu_ref_is_zero(&mddev->writes_pending)) { | |
6497709b | 2414 | mddev->in_sync = 1; |
4ad23a97 N |
2415 | /* |
2416 | * Ensure ->in_sync is visible before we clear | |
2417 | * ->sync_checkers. | |
2418 | */ | |
55cc39f3 | 2419 | smp_mb(); |
6497709b N |
2420 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2421 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
2422 | } | |
4ad23a97 N |
2423 | if (--mddev->sync_checkers == 0) |
2424 | percpu_ref_switch_to_percpu(&mddev->writes_pending); | |
6497709b N |
2425 | } |
2426 | if (mddev->safemode == 1) | |
2427 | mddev->safemode = 0; | |
2428 | return mddev->in_sync; | |
2429 | } | |
2430 | ||
f72ffdd6 | 2431 | static void sync_sbs(struct mddev *mddev, int nospares) |
1da177e4 | 2432 | { |
42543769 N |
2433 | /* Update each superblock (in-memory image), but |
2434 | * if we are allowed to, skip spares which already | |
2435 | * have the right event counter, or have one earlier | |
2436 | * (which would mean they aren't being marked as dirty | |
2437 | * with the rest of the array) | |
2438 | */ | |
3cb03002 | 2439 | struct md_rdev *rdev; |
dafb20fa | 2440 | rdev_for_each(rdev, mddev) { |
42543769 N |
2441 | if (rdev->sb_events == mddev->events || |
2442 | (nospares && | |
2443 | rdev->raid_disk < 0 && | |
42543769 N |
2444 | rdev->sb_events+1 == mddev->events)) { |
2445 | /* Don't update this superblock */ | |
2446 | rdev->sb_loaded = 2; | |
2447 | } else { | |
076f968b | 2448 | sync_super(mddev, rdev); |
42543769 N |
2449 | rdev->sb_loaded = 1; |
2450 | } | |
1da177e4 LT |
2451 | } |
2452 | } | |
2453 | ||
2aa82191 GR |
2454 | static bool does_sb_need_changing(struct mddev *mddev) |
2455 | { | |
2456 | struct md_rdev *rdev; | |
2457 | struct mdp_superblock_1 *sb; | |
2458 | int role; | |
2459 | ||
2460 | /* Find a good rdev */ | |
2461 | rdev_for_each(rdev, mddev) | |
2462 | if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) | |
2463 | break; | |
2464 | ||
2465 | /* No good device found. */ | |
2466 | if (!rdev) | |
2467 | return false; | |
2468 | ||
2469 | sb = page_address(rdev->sb_page); | |
2470 | /* Check if a device has become faulty or a spare become active */ | |
2471 | rdev_for_each(rdev, mddev) { | |
2472 | role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); | |
2473 | /* Device activated? */ | |
2474 | if (role == 0xffff && rdev->raid_disk >=0 && | |
2475 | !test_bit(Faulty, &rdev->flags)) | |
2476 | return true; | |
2477 | /* Device turned faulty? */ | |
2478 | if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) | |
2479 | return true; | |
2480 | } | |
2481 | ||
2482 | /* Check if any mddev parameters have changed */ | |
2483 | if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || | |
2484 | (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || | |
13459213 | 2485 | (mddev->layout != le32_to_cpu(sb->layout)) || |
2aa82191 GR |
2486 | (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || |
2487 | (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) | |
2488 | return true; | |
2489 | ||
2490 | return false; | |
2491 | } | |
2492 | ||
1aee41f6 | 2493 | void md_update_sb(struct mddev *mddev, int force_change) |
1da177e4 | 2494 | { |
3cb03002 | 2495 | struct md_rdev *rdev; |
06d91a5f | 2496 | int sync_req; |
42543769 | 2497 | int nospares = 0; |
2699b672 | 2498 | int any_badblocks_changed = 0; |
23b63f9f | 2499 | int ret = -1; |
1da177e4 | 2500 | |
d87f064f N |
2501 | if (mddev->ro) { |
2502 | if (force_change) | |
2953079c | 2503 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
d87f064f N |
2504 | return; |
2505 | } | |
2aa82191 | 2506 | |
2c97cf13 | 2507 | repeat: |
2aa82191 | 2508 | if (mddev_is_clustered(mddev)) { |
2953079c | 2509 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
2aa82191 | 2510 | force_change = 1; |
2953079c | 2511 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
85ad1d13 | 2512 | nospares = 1; |
23b63f9f | 2513 | ret = md_cluster_ops->metadata_update_start(mddev); |
2aa82191 GR |
2514 | /* Has someone else has updated the sb */ |
2515 | if (!does_sb_need_changing(mddev)) { | |
23b63f9f GJ |
2516 | if (ret == 0) |
2517 | md_cluster_ops->metadata_update_cancel(mddev); | |
2953079c SL |
2518 | bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2519 | BIT(MD_SB_CHANGE_DEVS) | | |
2520 | BIT(MD_SB_CHANGE_CLEAN)); | |
2aa82191 GR |
2521 | return; |
2522 | } | |
2523 | } | |
2c97cf13 | 2524 | |
db0505d3 N |
2525 | /* |
2526 | * First make sure individual recovery_offsets are correct | |
2527 | * curr_resync_completed can only be used during recovery. | |
2528 | * During reshape/resync it might use array-addresses rather | |
2529 | * that device addresses. | |
2530 | */ | |
dafb20fa | 2531 | rdev_for_each(rdev, mddev) { |
3a3a5ddb N |
2532 | if (rdev->raid_disk >= 0 && |
2533 | mddev->delta_disks >= 0 && | |
db0505d3 N |
2534 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
2535 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery) && | |
2536 | !test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
f2076e7d | 2537 | !test_bit(Journal, &rdev->flags) && |
3a3a5ddb N |
2538 | !test_bit(In_sync, &rdev->flags) && |
2539 | mddev->curr_resync_completed > rdev->recovery_offset) | |
2540 | rdev->recovery_offset = mddev->curr_resync_completed; | |
2541 | ||
f72ffdd6 | 2542 | } |
bd52b746 | 2543 | if (!mddev->persistent) { |
2953079c SL |
2544 | clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
2545 | clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
de393cde | 2546 | if (!mddev->external) { |
2953079c | 2547 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
dafb20fa | 2548 | rdev_for_each(rdev, mddev) { |
de393cde | 2549 | if (rdev->badblocks.changed) { |
d0962936 | 2550 | rdev->badblocks.changed = 0; |
fc974ee2 | 2551 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2552 | md_error(mddev, rdev); |
2553 | } | |
2554 | clear_bit(Blocked, &rdev->flags); | |
2555 | clear_bit(BlockedBadBlocks, &rdev->flags); | |
2556 | wake_up(&rdev->blocked_wait); | |
2557 | } | |
2558 | } | |
3a3a5ddb N |
2559 | wake_up(&mddev->sb_wait); |
2560 | return; | |
2561 | } | |
2562 | ||
85572d7c | 2563 | spin_lock(&mddev->lock); |
84692195 | 2564 | |
9ebc6ef1 | 2565 | mddev->utime = ktime_get_real_seconds(); |
3a3a5ddb | 2566 | |
2953079c | 2567 | if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) |
850b2b42 | 2568 | force_change = 1; |
2953079c | 2569 | if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags)) |
850b2b42 N |
2570 | /* just a clean<-> dirty transition, possibly leave spares alone, |
2571 | * though if events isn't the right even/odd, we will have to do | |
2572 | * spares after all | |
2573 | */ | |
2574 | nospares = 1; | |
2575 | if (force_change) | |
2576 | nospares = 0; | |
2577 | if (mddev->degraded) | |
84692195 N |
2578 | /* If the array is degraded, then skipping spares is both |
2579 | * dangerous and fairly pointless. | |
2580 | * Dangerous because a device that was removed from the array | |
2581 | * might have a event_count that still looks up-to-date, | |
2582 | * so it can be re-added without a resync. | |
2583 | * Pointless because if there are any spares to skip, | |
2584 | * then a recovery will happen and soon that array won't | |
2585 | * be degraded any more and the spare can go back to sleep then. | |
2586 | */ | |
850b2b42 | 2587 | nospares = 0; |
84692195 | 2588 | |
06d91a5f | 2589 | sync_req = mddev->in_sync; |
42543769 N |
2590 | |
2591 | /* If this is just a dirty<->clean transition, and the array is clean | |
2592 | * and 'events' is odd, we can roll back to the previous clean state */ | |
850b2b42 | 2593 | if (nospares |
42543769 | 2594 | && (mddev->in_sync && mddev->recovery_cp == MaxSector) |
a8707c08 N |
2595 | && mddev->can_decrease_events |
2596 | && mddev->events != 1) { | |
42543769 | 2597 | mddev->events--; |
a8707c08 N |
2598 | mddev->can_decrease_events = 0; |
2599 | } else { | |
42543769 N |
2600 | /* otherwise we have to go forward and ... */ |
2601 | mddev->events ++; | |
a8707c08 | 2602 | mddev->can_decrease_events = nospares; |
42543769 | 2603 | } |
1da177e4 | 2604 | |
403df478 N |
2605 | /* |
2606 | * This 64-bit counter should never wrap. | |
2607 | * Either we are in around ~1 trillion A.C., assuming | |
2608 | * 1 reboot per second, or we have a bug... | |
2609 | */ | |
2610 | WARN_ON(mddev->events == 0); | |
2699b672 | 2611 | |
dafb20fa | 2612 | rdev_for_each(rdev, mddev) { |
2699b672 N |
2613 | if (rdev->badblocks.changed) |
2614 | any_badblocks_changed++; | |
de393cde N |
2615 | if (test_bit(Faulty, &rdev->flags)) |
2616 | set_bit(FaultRecorded, &rdev->flags); | |
2617 | } | |
2699b672 | 2618 | |
e691063a | 2619 | sync_sbs(mddev, nospares); |
85572d7c | 2620 | spin_unlock(&mddev->lock); |
1da177e4 | 2621 | |
36a4e1fe N |
2622 | pr_debug("md: updating %s RAID superblock on device (in sync %d)\n", |
2623 | mdname(mddev), mddev->in_sync); | |
1da177e4 | 2624 | |
504634f6 SL |
2625 | if (mddev->queue) |
2626 | blk_add_trace_msg(mddev->queue, "md md_update_sb"); | |
46533ff7 | 2627 | rewrite: |
e64e4018 | 2628 | md_bitmap_update_sb(mddev->bitmap); |
dafb20fa | 2629 | rdev_for_each(rdev, mddev) { |
1da177e4 | 2630 | char b[BDEVNAME_SIZE]; |
36a4e1fe | 2631 | |
42543769 N |
2632 | if (rdev->sb_loaded != 1) |
2633 | continue; /* no noise on spare devices */ | |
1da177e4 | 2634 | |
f466722c | 2635 | if (!test_bit(Faulty, &rdev->flags)) { |
7bfa19f2 | 2636 | md_super_write(mddev,rdev, |
0f420358 | 2637 | rdev->sb_start, rdev->sb_size, |
7bfa19f2 | 2638 | rdev->sb_page); |
36a4e1fe N |
2639 | pr_debug("md: (write) %s's sb offset: %llu\n", |
2640 | bdevname(rdev->bdev, b), | |
2641 | (unsigned long long)rdev->sb_start); | |
42543769 | 2642 | rdev->sb_events = mddev->events; |
2699b672 N |
2643 | if (rdev->badblocks.size) { |
2644 | md_super_write(mddev, rdev, | |
2645 | rdev->badblocks.sector, | |
2646 | rdev->badblocks.size << 9, | |
2647 | rdev->bb_page); | |
2648 | rdev->badblocks.size = 0; | |
2649 | } | |
7bfa19f2 | 2650 | |
f466722c | 2651 | } else |
36a4e1fe N |
2652 | pr_debug("md: %s (skipping faulty)\n", |
2653 | bdevname(rdev->bdev, b)); | |
d70ed2e4 | 2654 | |
7bfa19f2 | 2655 | if (mddev->level == LEVEL_MULTIPATH) |
1da177e4 LT |
2656 | /* only need to write one superblock... */ |
2657 | break; | |
2658 | } | |
46533ff7 N |
2659 | if (md_super_wait(mddev) < 0) |
2660 | goto rewrite; | |
2953079c | 2661 | /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */ |
7bfa19f2 | 2662 | |
2c97cf13 GJ |
2663 | if (mddev_is_clustered(mddev) && ret == 0) |
2664 | md_cluster_ops->metadata_update_finish(mddev); | |
2665 | ||
850b2b42 | 2666 | if (mddev->in_sync != sync_req || |
2953079c SL |
2667 | !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING), |
2668 | BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN))) | |
06d91a5f | 2669 | /* have to write it out again */ |
06d91a5f | 2670 | goto repeat; |
3d310eb7 | 2671 | wake_up(&mddev->sb_wait); |
acb180b0 N |
2672 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
2673 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
06d91a5f | 2674 | |
dafb20fa | 2675 | rdev_for_each(rdev, mddev) { |
de393cde N |
2676 | if (test_and_clear_bit(FaultRecorded, &rdev->flags)) |
2677 | clear_bit(Blocked, &rdev->flags); | |
2678 | ||
2679 | if (any_badblocks_changed) | |
fc974ee2 | 2680 | ack_all_badblocks(&rdev->badblocks); |
de393cde N |
2681 | clear_bit(BlockedBadBlocks, &rdev->flags); |
2682 | wake_up(&rdev->blocked_wait); | |
2683 | } | |
1da177e4 | 2684 | } |
1aee41f6 | 2685 | EXPORT_SYMBOL(md_update_sb); |
1da177e4 | 2686 | |
a6da4ef8 GR |
2687 | static int add_bound_rdev(struct md_rdev *rdev) |
2688 | { | |
2689 | struct mddev *mddev = rdev->mddev; | |
2690 | int err = 0; | |
87d4d916 | 2691 | bool add_journal = test_bit(Journal, &rdev->flags); |
a6da4ef8 | 2692 | |
87d4d916 | 2693 | if (!mddev->pers->hot_remove_disk || add_journal) { |
a6da4ef8 GR |
2694 | /* If there is hot_add_disk but no hot_remove_disk |
2695 | * then added disks for geometry changes, | |
2696 | * and should be added immediately. | |
2697 | */ | |
2698 | super_types[mddev->major_version]. | |
2699 | validate_super(mddev, rdev); | |
87d4d916 SL |
2700 | if (add_journal) |
2701 | mddev_suspend(mddev); | |
a6da4ef8 | 2702 | err = mddev->pers->hot_add_disk(mddev, rdev); |
87d4d916 SL |
2703 | if (add_journal) |
2704 | mddev_resume(mddev); | |
a6da4ef8 | 2705 | if (err) { |
db767672 | 2706 | md_kick_rdev_from_array(rdev); |
a6da4ef8 GR |
2707 | return err; |
2708 | } | |
2709 | } | |
2710 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
2711 | ||
2953079c | 2712 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a6da4ef8 GR |
2713 | if (mddev->degraded) |
2714 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
2715 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
2716 | md_new_event(mddev); | |
2717 | md_wakeup_thread(mddev->thread); | |
2718 | return 0; | |
2719 | } | |
1da177e4 | 2720 | |
7f6ce769 | 2721 | /* words written to sysfs files may, or may not, be \n terminated. |
bce74dac N |
2722 | * We want to accept with case. For this we use cmd_match. |
2723 | */ | |
2724 | static int cmd_match(const char *cmd, const char *str) | |
2725 | { | |
2726 | /* See if cmd, written into a sysfs file, matches | |
2727 | * str. They must either be the same, or cmd can | |
2728 | * have a trailing newline | |
2729 | */ | |
2730 | while (*cmd && *str && *cmd == *str) { | |
2731 | cmd++; | |
2732 | str++; | |
2733 | } | |
2734 | if (*cmd == '\n') | |
2735 | cmd++; | |
2736 | if (*str || *cmd) | |
2737 | return 0; | |
2738 | return 1; | |
2739 | } | |
2740 | ||
86e6ffdd N |
2741 | struct rdev_sysfs_entry { |
2742 | struct attribute attr; | |
3cb03002 N |
2743 | ssize_t (*show)(struct md_rdev *, char *); |
2744 | ssize_t (*store)(struct md_rdev *, const char *, size_t); | |
86e6ffdd N |
2745 | }; |
2746 | ||
2747 | static ssize_t | |
3cb03002 | 2748 | state_show(struct md_rdev *rdev, char *page) |
86e6ffdd | 2749 | { |
35b785f7 | 2750 | char *sep = ","; |
20a49ff6 | 2751 | size_t len = 0; |
6aa7de05 | 2752 | unsigned long flags = READ_ONCE(rdev->flags); |
86e6ffdd | 2753 | |
758bfc8a | 2754 | if (test_bit(Faulty, &flags) || |
dcbcb486 TM |
2755 | (!test_bit(ExternalBbl, &flags) && |
2756 | rdev->badblocks.unacked_exist)) | |
35b785f7 TM |
2757 | len += sprintf(page+len, "faulty%s", sep); |
2758 | if (test_bit(In_sync, &flags)) | |
2759 | len += sprintf(page+len, "in_sync%s", sep); | |
2760 | if (test_bit(Journal, &flags)) | |
2761 | len += sprintf(page+len, "journal%s", sep); | |
2762 | if (test_bit(WriteMostly, &flags)) | |
2763 | len += sprintf(page+len, "write_mostly%s", sep); | |
758bfc8a | 2764 | if (test_bit(Blocked, &flags) || |
52c64152 | 2765 | (rdev->badblocks.unacked_exist |
35b785f7 TM |
2766 | && !test_bit(Faulty, &flags))) |
2767 | len += sprintf(page+len, "blocked%s", sep); | |
758bfc8a | 2768 | if (!test_bit(Faulty, &flags) && |
f2076e7d | 2769 | !test_bit(Journal, &flags) && |
35b785f7 TM |
2770 | !test_bit(In_sync, &flags)) |
2771 | len += sprintf(page+len, "spare%s", sep); | |
2772 | if (test_bit(WriteErrorSeen, &flags)) | |
2773 | len += sprintf(page+len, "write_error%s", sep); | |
2774 | if (test_bit(WantReplacement, &flags)) | |
2775 | len += sprintf(page+len, "want_replacement%s", sep); | |
2776 | if (test_bit(Replacement, &flags)) | |
2777 | len += sprintf(page+len, "replacement%s", sep); | |
2778 | if (test_bit(ExternalBbl, &flags)) | |
2779 | len += sprintf(page+len, "external_bbl%s", sep); | |
688834e6 N |
2780 | if (test_bit(FailFast, &flags)) |
2781 | len += sprintf(page+len, "failfast%s", sep); | |
35b785f7 TM |
2782 | |
2783 | if (len) | |
2784 | len -= strlen(sep); | |
2d78f8c4 | 2785 | |
86e6ffdd N |
2786 | return len+sprintf(page+len, "\n"); |
2787 | } | |
2788 | ||
45dc2de1 | 2789 | static ssize_t |
3cb03002 | 2790 | state_store(struct md_rdev *rdev, const char *buf, size_t len) |
45dc2de1 N |
2791 | { |
2792 | /* can write | |
de393cde | 2793 | * faulty - simulates an error |
45dc2de1 | 2794 | * remove - disconnects the device |
f655675b N |
2795 | * writemostly - sets write_mostly |
2796 | * -writemostly - clears write_mostly | |
de393cde N |
2797 | * blocked - sets the Blocked flags |
2798 | * -blocked - clears the Blocked and possibly simulates an error | |
6d56e278 | 2799 | * insync - sets Insync providing device isn't active |
f466722c N |
2800 | * -insync - clear Insync for a device with a slot assigned, |
2801 | * so that it gets rebuilt based on bitmap | |
d7a9d443 N |
2802 | * write_error - sets WriteErrorSeen |
2803 | * -write_error - clears WriteErrorSeen | |
688834e6 | 2804 | * {,-}failfast - set/clear FailFast |
45dc2de1 N |
2805 | */ |
2806 | int err = -EINVAL; | |
2807 | if (cmd_match(buf, "faulty") && rdev->mddev->pers) { | |
2808 | md_error(rdev->mddev, rdev); | |
5ef56c8f N |
2809 | if (test_bit(Faulty, &rdev->flags)) |
2810 | err = 0; | |
2811 | else | |
2812 | err = -EBUSY; | |
45dc2de1 | 2813 | } else if (cmd_match(buf, "remove")) { |
5d881783 SL |
2814 | if (rdev->mddev->pers) { |
2815 | clear_bit(Blocked, &rdev->flags); | |
2816 | remove_and_add_spares(rdev->mddev, rdev); | |
2817 | } | |
45dc2de1 N |
2818 | if (rdev->raid_disk >= 0) |
2819 | err = -EBUSY; | |
2820 | else { | |
fd01b88c | 2821 | struct mddev *mddev = rdev->mddev; |
45dc2de1 | 2822 | err = 0; |
a9720903 GJ |
2823 | if (mddev_is_clustered(mddev)) |
2824 | err = md_cluster_ops->remove_disk(mddev, rdev); | |
2825 | ||
2826 | if (err == 0) { | |
2827 | md_kick_rdev_from_array(rdev); | |
060b0689 | 2828 | if (mddev->pers) { |
2953079c | 2829 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
2830 | md_wakeup_thread(mddev->thread); |
2831 | } | |
a9720903 GJ |
2832 | md_new_event(mddev); |
2833 | } | |
45dc2de1 | 2834 | } |
f655675b N |
2835 | } else if (cmd_match(buf, "writemostly")) { |
2836 | set_bit(WriteMostly, &rdev->flags); | |
963c555e | 2837 | mddev_create_wb_pool(rdev->mddev, rdev, false); |
f655675b N |
2838 | err = 0; |
2839 | } else if (cmd_match(buf, "-writemostly")) { | |
963c555e | 2840 | mddev_destroy_wb_pool(rdev->mddev, rdev); |
f655675b | 2841 | clear_bit(WriteMostly, &rdev->flags); |
6bfe0b49 DW |
2842 | err = 0; |
2843 | } else if (cmd_match(buf, "blocked")) { | |
2844 | set_bit(Blocked, &rdev->flags); | |
2845 | err = 0; | |
2846 | } else if (cmd_match(buf, "-blocked")) { | |
de393cde | 2847 | if (!test_bit(Faulty, &rdev->flags) && |
dcbcb486 | 2848 | !test_bit(ExternalBbl, &rdev->flags) && |
7da64a0a | 2849 | rdev->badblocks.unacked_exist) { |
de393cde N |
2850 | /* metadata handler doesn't understand badblocks, |
2851 | * so we need to fail the device | |
2852 | */ | |
2853 | md_error(rdev->mddev, rdev); | |
2854 | } | |
6bfe0b49 | 2855 | clear_bit(Blocked, &rdev->flags); |
de393cde | 2856 | clear_bit(BlockedBadBlocks, &rdev->flags); |
6bfe0b49 DW |
2857 | wake_up(&rdev->blocked_wait); |
2858 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2859 | md_wakeup_thread(rdev->mddev->thread); | |
2860 | ||
6d56e278 N |
2861 | err = 0; |
2862 | } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) { | |
2863 | set_bit(In_sync, &rdev->flags); | |
f655675b | 2864 | err = 0; |
688834e6 N |
2865 | } else if (cmd_match(buf, "failfast")) { |
2866 | set_bit(FailFast, &rdev->flags); | |
2867 | err = 0; | |
2868 | } else if (cmd_match(buf, "-failfast")) { | |
2869 | clear_bit(FailFast, &rdev->flags); | |
2870 | err = 0; | |
f2076e7d SL |
2871 | } else if (cmd_match(buf, "-insync") && rdev->raid_disk >= 0 && |
2872 | !test_bit(Journal, &rdev->flags)) { | |
e1960f8c N |
2873 | if (rdev->mddev->pers == NULL) { |
2874 | clear_bit(In_sync, &rdev->flags); | |
2875 | rdev->saved_raid_disk = rdev->raid_disk; | |
2876 | rdev->raid_disk = -1; | |
2877 | err = 0; | |
2878 | } | |
d7a9d443 N |
2879 | } else if (cmd_match(buf, "write_error")) { |
2880 | set_bit(WriteErrorSeen, &rdev->flags); | |
2881 | err = 0; | |
2882 | } else if (cmd_match(buf, "-write_error")) { | |
2883 | clear_bit(WriteErrorSeen, &rdev->flags); | |
2884 | err = 0; | |
2d78f8c4 N |
2885 | } else if (cmd_match(buf, "want_replacement")) { |
2886 | /* Any non-spare device that is not a replacement can | |
2887 | * become want_replacement at any time, but we then need to | |
2888 | * check if recovery is needed. | |
2889 | */ | |
2890 | if (rdev->raid_disk >= 0 && | |
f2076e7d | 2891 | !test_bit(Journal, &rdev->flags) && |
2d78f8c4 N |
2892 | !test_bit(Replacement, &rdev->flags)) |
2893 | set_bit(WantReplacement, &rdev->flags); | |
2894 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); | |
2895 | md_wakeup_thread(rdev->mddev->thread); | |
2896 | err = 0; | |
2897 | } else if (cmd_match(buf, "-want_replacement")) { | |
2898 | /* Clearing 'want_replacement' is always allowed. | |
2899 | * Once replacements starts it is too late though. | |
2900 | */ | |
2901 | err = 0; | |
2902 | clear_bit(WantReplacement, &rdev->flags); | |
2903 | } else if (cmd_match(buf, "replacement")) { | |
2904 | /* Can only set a device as a replacement when array has not | |
2905 | * yet been started. Once running, replacement is automatic | |
2906 | * from spares, or by assigning 'slot'. | |
2907 | */ | |
2908 | if (rdev->mddev->pers) | |
2909 | err = -EBUSY; | |
2910 | else { | |
2911 | set_bit(Replacement, &rdev->flags); | |
2912 | err = 0; | |
2913 | } | |
2914 | } else if (cmd_match(buf, "-replacement")) { | |
2915 | /* Similarly, can only clear Replacement before start */ | |
2916 | if (rdev->mddev->pers) | |
2917 | err = -EBUSY; | |
2918 | else { | |
2919 | clear_bit(Replacement, &rdev->flags); | |
2920 | err = 0; | |
2921 | } | |
a6da4ef8 | 2922 | } else if (cmd_match(buf, "re-add")) { |
ee37e621 YY |
2923 | if (!rdev->mddev->pers) |
2924 | err = -EINVAL; | |
2925 | else if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1) && | |
2926 | rdev->saved_raid_disk >= 0) { | |
97f6cd39 GR |
2927 | /* clear_bit is performed _after_ all the devices |
2928 | * have their local Faulty bit cleared. If any writes | |
2929 | * happen in the meantime in the local node, they | |
2930 | * will land in the local bitmap, which will be synced | |
2931 | * by this node eventually | |
2932 | */ | |
2933 | if (!mddev_is_clustered(rdev->mddev) || | |
2934 | (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) { | |
2935 | clear_bit(Faulty, &rdev->flags); | |
2936 | err = add_bound_rdev(rdev); | |
2937 | } | |
a6da4ef8 GR |
2938 | } else |
2939 | err = -EBUSY; | |
35b785f7 TM |
2940 | } else if (cmd_match(buf, "external_bbl") && (rdev->mddev->external)) { |
2941 | set_bit(ExternalBbl, &rdev->flags); | |
2942 | rdev->badblocks.shift = 0; | |
2943 | err = 0; | |
2944 | } else if (cmd_match(buf, "-external_bbl") && (rdev->mddev->external)) { | |
2945 | clear_bit(ExternalBbl, &rdev->flags); | |
2946 | err = 0; | |
45dc2de1 | 2947 | } |
00bcb4ac N |
2948 | if (!err) |
2949 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
45dc2de1 N |
2950 | return err ? err : len; |
2951 | } | |
80ca3a44 | 2952 | static struct rdev_sysfs_entry rdev_state = |
750f199e | 2953 | __ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store); |
86e6ffdd | 2954 | |
4dbcdc75 | 2955 | static ssize_t |
3cb03002 | 2956 | errors_show(struct md_rdev *rdev, char *page) |
4dbcdc75 N |
2957 | { |
2958 | return sprintf(page, "%d\n", atomic_read(&rdev->corrected_errors)); | |
2959 | } | |
2960 | ||
2961 | static ssize_t | |
3cb03002 | 2962 | errors_store(struct md_rdev *rdev, const char *buf, size_t len) |
4dbcdc75 | 2963 | { |
4c9309c0 AD |
2964 | unsigned int n; |
2965 | int rv; | |
2966 | ||
2967 | rv = kstrtouint(buf, 10, &n); | |
2968 | if (rv < 0) | |
2969 | return rv; | |
2970 | atomic_set(&rdev->corrected_errors, n); | |
2971 | return len; | |
4dbcdc75 N |
2972 | } |
2973 | static struct rdev_sysfs_entry rdev_errors = | |
80ca3a44 | 2974 | __ATTR(errors, S_IRUGO|S_IWUSR, errors_show, errors_store); |
4dbcdc75 | 2975 | |
014236d2 | 2976 | static ssize_t |
3cb03002 | 2977 | slot_show(struct md_rdev *rdev, char *page) |
014236d2 | 2978 | { |
f2076e7d SL |
2979 | if (test_bit(Journal, &rdev->flags)) |
2980 | return sprintf(page, "journal\n"); | |
2981 | else if (rdev->raid_disk < 0) | |
014236d2 N |
2982 | return sprintf(page, "none\n"); |
2983 | else | |
2984 | return sprintf(page, "%d\n", rdev->raid_disk); | |
2985 | } | |
2986 | ||
2987 | static ssize_t | |
3cb03002 | 2988 | slot_store(struct md_rdev *rdev, const char *buf, size_t len) |
014236d2 | 2989 | { |
4c9309c0 | 2990 | int slot; |
c303da6d | 2991 | int err; |
4c9309c0 | 2992 | |
f2076e7d SL |
2993 | if (test_bit(Journal, &rdev->flags)) |
2994 | return -EBUSY; | |
014236d2 N |
2995 | if (strncmp(buf, "none", 4)==0) |
2996 | slot = -1; | |
4c9309c0 AD |
2997 | else { |
2998 | err = kstrtouint(buf, 10, (unsigned int *)&slot); | |
2999 | if (err < 0) | |
3000 | return err; | |
3001 | } | |
6c2fce2e | 3002 | if (rdev->mddev->pers && slot == -1) { |
c303da6d N |
3003 | /* Setting 'slot' on an active array requires also |
3004 | * updating the 'rd%d' link, and communicating | |
3005 | * with the personality with ->hot_*_disk. | |
3006 | * For now we only support removing | |
3007 | * failed/spare devices. This normally happens automatically, | |
3008 | * but not when the metadata is externally managed. | |
3009 | */ | |
c303da6d N |
3010 | if (rdev->raid_disk == -1) |
3011 | return -EEXIST; | |
3012 | /* personality does all needed checks */ | |
01393f3d | 3013 | if (rdev->mddev->pers->hot_remove_disk == NULL) |
c303da6d | 3014 | return -EINVAL; |
746d3207 N |
3015 | clear_bit(Blocked, &rdev->flags); |
3016 | remove_and_add_spares(rdev->mddev, rdev); | |
3017 | if (rdev->raid_disk >= 0) | |
3018 | return -EBUSY; | |
c303da6d N |
3019 | set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); |
3020 | md_wakeup_thread(rdev->mddev->thread); | |
6c2fce2e | 3021 | } else if (rdev->mddev->pers) { |
6c2fce2e | 3022 | /* Activating a spare .. or possibly reactivating |
6d56e278 | 3023 | * if we ever get bitmaps working here. |
6c2fce2e | 3024 | */ |
cb01c549 | 3025 | int err; |
6c2fce2e NB |
3026 | |
3027 | if (rdev->raid_disk != -1) | |
3028 | return -EBUSY; | |
3029 | ||
c6751b2b N |
3030 | if (test_bit(MD_RECOVERY_RUNNING, &rdev->mddev->recovery)) |
3031 | return -EBUSY; | |
3032 | ||
6c2fce2e NB |
3033 | if (rdev->mddev->pers->hot_add_disk == NULL) |
3034 | return -EINVAL; | |
3035 | ||
ba1b41b6 N |
3036 | if (slot >= rdev->mddev->raid_disks && |
3037 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
3038 | return -ENOSPC; | |
3039 | ||
6c2fce2e NB |
3040 | rdev->raid_disk = slot; |
3041 | if (test_bit(In_sync, &rdev->flags)) | |
3042 | rdev->saved_raid_disk = slot; | |
3043 | else | |
3044 | rdev->saved_raid_disk = -1; | |
d30519fc | 3045 | clear_bit(In_sync, &rdev->flags); |
8313b8e5 | 3046 | clear_bit(Bitmap_sync, &rdev->flags); |
cb01c549 GR |
3047 | err = rdev->mddev->pers-> |
3048 | hot_add_disk(rdev->mddev, rdev); | |
3049 | if (err) { | |
3050 | rdev->raid_disk = -1; | |
3051 | return err; | |
3052 | } else | |
3053 | sysfs_notify_dirent_safe(rdev->sysfs_state); | |
3054 | if (sysfs_link_rdev(rdev->mddev, rdev)) | |
3055 | /* failure here is OK */; | |
6c2fce2e | 3056 | /* don't wakeup anyone, leave that to userspace. */ |
c303da6d | 3057 | } else { |
ba1b41b6 N |
3058 | if (slot >= rdev->mddev->raid_disks && |
3059 | slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) | |
c303da6d N |
3060 | return -ENOSPC; |
3061 | rdev->raid_disk = slot; | |
3062 | /* assume it is working */ | |
c5d79adb N |
3063 | clear_bit(Faulty, &rdev->flags); |
3064 | clear_bit(WriteMostly, &rdev->flags); | |
c303da6d | 3065 | set_bit(In_sync, &rdev->flags); |
00bcb4ac | 3066 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
c303da6d | 3067 | } |
014236d2 N |
3068 | return len; |
3069 | } | |
3070 | ||
014236d2 | 3071 | static struct rdev_sysfs_entry rdev_slot = |
80ca3a44 | 3072 | __ATTR(slot, S_IRUGO|S_IWUSR, slot_show, slot_store); |
014236d2 | 3073 | |
93c8cad0 | 3074 | static ssize_t |
3cb03002 | 3075 | offset_show(struct md_rdev *rdev, char *page) |
93c8cad0 | 3076 | { |
6961ece4 | 3077 | return sprintf(page, "%llu\n", (unsigned long long)rdev->data_offset); |
93c8cad0 N |
3078 | } |
3079 | ||
3080 | static ssize_t | |
3cb03002 | 3081 | offset_store(struct md_rdev *rdev, const char *buf, size_t len) |
93c8cad0 | 3082 | { |
c6563a8c | 3083 | unsigned long long offset; |
b29bebd6 | 3084 | if (kstrtoull(buf, 10, &offset) < 0) |
93c8cad0 | 3085 | return -EINVAL; |
8ed0a521 | 3086 | if (rdev->mddev->pers && rdev->raid_disk >= 0) |
93c8cad0 | 3087 | return -EBUSY; |
dd8ac336 | 3088 | if (rdev->sectors && rdev->mddev->external) |
c5d79adb N |
3089 | /* Must set offset before size, so overlap checks |
3090 | * can be sane */ | |
3091 | return -EBUSY; | |
93c8cad0 | 3092 | rdev->data_offset = offset; |
25f7fd47 | 3093 | rdev->new_data_offset = offset; |
93c8cad0 N |
3094 | return len; |
3095 | } | |
3096 | ||
3097 | static struct rdev_sysfs_entry rdev_offset = | |
80ca3a44 | 3098 | __ATTR(offset, S_IRUGO|S_IWUSR, offset_show, offset_store); |
93c8cad0 | 3099 | |
c6563a8c N |
3100 | static ssize_t new_offset_show(struct md_rdev *rdev, char *page) |
3101 | { | |
3102 | return sprintf(page, "%llu\n", | |
3103 | (unsigned long long)rdev->new_data_offset); | |
3104 | } | |
3105 | ||
3106 | static ssize_t new_offset_store(struct md_rdev *rdev, | |
3107 | const char *buf, size_t len) | |
3108 | { | |
3109 | unsigned long long new_offset; | |
3110 | struct mddev *mddev = rdev->mddev; | |
3111 | ||
b29bebd6 | 3112 | if (kstrtoull(buf, 10, &new_offset) < 0) |
c6563a8c N |
3113 | return -EINVAL; |
3114 | ||
f851b60d N |
3115 | if (mddev->sync_thread || |
3116 | test_bit(MD_RECOVERY_RUNNING,&mddev->recovery)) | |
c6563a8c N |
3117 | return -EBUSY; |
3118 | if (new_offset == rdev->data_offset) | |
3119 | /* reset is always permitted */ | |
3120 | ; | |
3121 | else if (new_offset > rdev->data_offset) { | |
3122 | /* must not push array size beyond rdev_sectors */ | |
3123 | if (new_offset - rdev->data_offset | |
3124 | + mddev->dev_sectors > rdev->sectors) | |
3125 | return -E2BIG; | |
3126 | } | |
3127 | /* Metadata worries about other space details. */ | |
3128 | ||
3129 | /* decreasing the offset is inconsistent with a backwards | |
3130 | * reshape. | |
3131 | */ | |
3132 | if (new_offset < rdev->data_offset && | |
3133 | mddev->reshape_backwards) | |
3134 | return -EINVAL; | |
3135 | /* Increasing offset is inconsistent with forwards | |
3136 | * reshape. reshape_direction should be set to | |
3137 | * 'backwards' first. | |
3138 | */ | |
3139 | if (new_offset > rdev->data_offset && | |
3140 | !mddev->reshape_backwards) | |
3141 | return -EINVAL; | |
3142 | ||
3143 | if (mddev->pers && mddev->persistent && | |
3144 | !super_types[mddev->major_version] | |
3145 | .allow_new_offset(rdev, new_offset)) | |
3146 | return -E2BIG; | |
3147 | rdev->new_data_offset = new_offset; | |
3148 | if (new_offset > rdev->data_offset) | |
3149 | mddev->reshape_backwards = 1; | |
3150 | else if (new_offset < rdev->data_offset) | |
3151 | mddev->reshape_backwards = 0; | |
3152 | ||
3153 | return len; | |
3154 | } | |
3155 | static struct rdev_sysfs_entry rdev_new_offset = | |
3156 | __ATTR(new_offset, S_IRUGO|S_IWUSR, new_offset_show, new_offset_store); | |
3157 | ||
83303b61 | 3158 | static ssize_t |
3cb03002 | 3159 | rdev_size_show(struct md_rdev *rdev, char *page) |
83303b61 | 3160 | { |
dd8ac336 | 3161 | return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2); |
83303b61 N |
3162 | } |
3163 | ||
c5d79adb N |
3164 | static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2) |
3165 | { | |
3166 | /* check if two start/length pairs overlap */ | |
3167 | if (s1+l1 <= s2) | |
3168 | return 0; | |
3169 | if (s2+l2 <= s1) | |
3170 | return 0; | |
3171 | return 1; | |
3172 | } | |
3173 | ||
b522adcd DW |
3174 | static int strict_blocks_to_sectors(const char *buf, sector_t *sectors) |
3175 | { | |
3176 | unsigned long long blocks; | |
3177 | sector_t new; | |
3178 | ||
b29bebd6 | 3179 | if (kstrtoull(buf, 10, &blocks) < 0) |
b522adcd DW |
3180 | return -EINVAL; |
3181 | ||
3182 | if (blocks & 1ULL << (8 * sizeof(blocks) - 1)) | |
3183 | return -EINVAL; /* sector conversion overflow */ | |
3184 | ||
3185 | new = blocks * 2; | |
3186 | if (new != blocks * 2) | |
3187 | return -EINVAL; /* unsigned long long to sector_t overflow */ | |
3188 | ||
3189 | *sectors = new; | |
3190 | return 0; | |
3191 | } | |
3192 | ||
83303b61 | 3193 | static ssize_t |
3cb03002 | 3194 | rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) |
83303b61 | 3195 | { |
fd01b88c | 3196 | struct mddev *my_mddev = rdev->mddev; |
dd8ac336 | 3197 | sector_t oldsectors = rdev->sectors; |
b522adcd | 3198 | sector_t sectors; |
27c529bb | 3199 | |
f2076e7d SL |
3200 | if (test_bit(Journal, &rdev->flags)) |
3201 | return -EBUSY; | |
b522adcd | 3202 | if (strict_blocks_to_sectors(buf, §ors) < 0) |
d7027458 | 3203 | return -EINVAL; |
c6563a8c N |
3204 | if (rdev->data_offset != rdev->new_data_offset) |
3205 | return -EINVAL; /* too confusing */ | |
0cd17fec | 3206 | if (my_mddev->pers && rdev->raid_disk >= 0) { |
d7027458 | 3207 | if (my_mddev->persistent) { |
dd8ac336 AN |
3208 | sectors = super_types[my_mddev->major_version]. |
3209 | rdev_size_change(rdev, sectors); | |
3210 | if (!sectors) | |
0cd17fec | 3211 | return -EBUSY; |
dd8ac336 | 3212 | } else if (!sectors) |
77304d2a | 3213 | sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - |
dd8ac336 | 3214 | rdev->data_offset; |
a6468539 N |
3215 | if (!my_mddev->pers->resize) |
3216 | /* Cannot change size for RAID0 or Linear etc */ | |
3217 | return -EINVAL; | |
0cd17fec | 3218 | } |
dd8ac336 | 3219 | if (sectors < my_mddev->dev_sectors) |
7d3c6f87 | 3220 | return -EINVAL; /* component must fit device */ |
0cd17fec | 3221 | |
dd8ac336 AN |
3222 | rdev->sectors = sectors; |
3223 | if (sectors > oldsectors && my_mddev->external) { | |
8b1afc3d N |
3224 | /* Need to check that all other rdevs with the same |
3225 | * ->bdev do not overlap. 'rcu' is sufficient to walk | |
3226 | * the rdev lists safely. | |
3227 | * This check does not provide a hard guarantee, it | |
3228 | * just helps avoid dangerous mistakes. | |
c5d79adb | 3229 | */ |
fd01b88c | 3230 | struct mddev *mddev; |
c5d79adb | 3231 | int overlap = 0; |
159ec1fc | 3232 | struct list_head *tmp; |
c5d79adb | 3233 | |
8b1afc3d | 3234 | rcu_read_lock(); |
29ac4aa3 | 3235 | for_each_mddev(mddev, tmp) { |
3cb03002 | 3236 | struct md_rdev *rdev2; |
c5d79adb | 3237 | |
dafb20fa | 3238 | rdev_for_each(rdev2, mddev) |
f21e9ff7 N |
3239 | if (rdev->bdev == rdev2->bdev && |
3240 | rdev != rdev2 && | |
3241 | overlaps(rdev->data_offset, rdev->sectors, | |
3242 | rdev2->data_offset, | |
3243 | rdev2->sectors)) { | |
c5d79adb N |
3244 | overlap = 1; |
3245 | break; | |
3246 | } | |
c5d79adb N |
3247 | if (overlap) { |
3248 | mddev_put(mddev); | |
3249 | break; | |
3250 | } | |
3251 | } | |
8b1afc3d | 3252 | rcu_read_unlock(); |
c5d79adb N |
3253 | if (overlap) { |
3254 | /* Someone else could have slipped in a size | |
3255 | * change here, but doing so is just silly. | |
dd8ac336 | 3256 | * We put oldsectors back because we *know* it is |
c5d79adb N |
3257 | * safe, and trust userspace not to race with |
3258 | * itself | |
3259 | */ | |
dd8ac336 | 3260 | rdev->sectors = oldsectors; |
c5d79adb N |
3261 | return -EBUSY; |
3262 | } | |
3263 | } | |
83303b61 N |
3264 | return len; |
3265 | } | |
3266 | ||
3267 | static struct rdev_sysfs_entry rdev_size = | |
80ca3a44 | 3268 | __ATTR(size, S_IRUGO|S_IWUSR, rdev_size_show, rdev_size_store); |
83303b61 | 3269 | |
3cb03002 | 3270 | static ssize_t recovery_start_show(struct md_rdev *rdev, char *page) |
06e3c817 DW |
3271 | { |
3272 | unsigned long long recovery_start = rdev->recovery_offset; | |
3273 | ||
3274 | if (test_bit(In_sync, &rdev->flags) || | |
3275 | recovery_start == MaxSector) | |
3276 | return sprintf(page, "none\n"); | |
3277 | ||
3278 | return sprintf(page, "%llu\n", recovery_start); | |
3279 | } | |
3280 | ||
3cb03002 | 3281 | static ssize_t recovery_start_store(struct md_rdev *rdev, const char *buf, size_t len) |
06e3c817 DW |
3282 | { |
3283 | unsigned long long recovery_start; | |
3284 | ||
3285 | if (cmd_match(buf, "none")) | |
3286 | recovery_start = MaxSector; | |
b29bebd6 | 3287 | else if (kstrtoull(buf, 10, &recovery_start)) |
06e3c817 DW |
3288 | return -EINVAL; |
3289 | ||
3290 | if (rdev->mddev->pers && | |
3291 | rdev->raid_disk >= 0) | |
3292 | return -EBUSY; | |
3293 | ||
3294 | rdev->recovery_offset = recovery_start; | |
3295 | if (recovery_start == MaxSector) | |
3296 | set_bit(In_sync, &rdev->flags); | |
3297 | else | |
3298 | clear_bit(In_sync, &rdev->flags); | |
3299 | return len; | |
3300 | } | |
3301 | ||
3302 | static struct rdev_sysfs_entry rdev_recovery_start = | |
3303 | __ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store); | |
3304 | ||
fc974ee2 VV |
3305 | /* sysfs access to bad-blocks list. |
3306 | * We present two files. | |
3307 | * 'bad-blocks' lists sector numbers and lengths of ranges that | |
3308 | * are recorded as bad. The list is truncated to fit within | |
3309 | * the one-page limit of sysfs. | |
3310 | * Writing "sector length" to this file adds an acknowledged | |
3311 | * bad block list. | |
3312 | * 'unacknowledged-bad-blocks' lists bad blocks that have not yet | |
3313 | * been acknowledged. Writing to this file adds bad blocks | |
3314 | * without acknowledging them. This is largely for testing. | |
3315 | */ | |
3cb03002 | 3316 | static ssize_t bb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3317 | { |
3318 | return badblocks_show(&rdev->badblocks, page, 0); | |
3319 | } | |
3cb03002 | 3320 | static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 | 3321 | { |
de393cde N |
3322 | int rv = badblocks_store(&rdev->badblocks, page, len, 0); |
3323 | /* Maybe that ack was all we needed */ | |
3324 | if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags)) | |
3325 | wake_up(&rdev->blocked_wait); | |
3326 | return rv; | |
16c791a5 N |
3327 | } |
3328 | static struct rdev_sysfs_entry rdev_bad_blocks = | |
3329 | __ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store); | |
3330 | ||
3cb03002 | 3331 | static ssize_t ubb_show(struct md_rdev *rdev, char *page) |
16c791a5 N |
3332 | { |
3333 | return badblocks_show(&rdev->badblocks, page, 1); | |
3334 | } | |
3cb03002 | 3335 | static ssize_t ubb_store(struct md_rdev *rdev, const char *page, size_t len) |
16c791a5 N |
3336 | { |
3337 | return badblocks_store(&rdev->badblocks, page, len, 1); | |
3338 | } | |
3339 | static struct rdev_sysfs_entry rdev_unack_bad_blocks = | |
3340 | __ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store); | |
3341 | ||
664aed04 AP |
3342 | static ssize_t |
3343 | ppl_sector_show(struct md_rdev *rdev, char *page) | |
3344 | { | |
3345 | return sprintf(page, "%llu\n", (unsigned long long)rdev->ppl.sector); | |
3346 | } | |
3347 | ||
3348 | static ssize_t | |
3349 | ppl_sector_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3350 | { | |
3351 | unsigned long long sector; | |
3352 | ||
3353 | if (kstrtoull(buf, 10, §or) < 0) | |
3354 | return -EINVAL; | |
3355 | if (sector != (sector_t)sector) | |
3356 | return -EINVAL; | |
3357 | ||
3358 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3359 | rdev->raid_disk >= 0) | |
3360 | return -EBUSY; | |
3361 | ||
3362 | if (rdev->mddev->persistent) { | |
3363 | if (rdev->mddev->major_version == 0) | |
3364 | return -EINVAL; | |
3365 | if ((sector > rdev->sb_start && | |
3366 | sector - rdev->sb_start > S16_MAX) || | |
3367 | (sector < rdev->sb_start && | |
3368 | rdev->sb_start - sector > -S16_MIN)) | |
3369 | return -EINVAL; | |
3370 | rdev->ppl.offset = sector - rdev->sb_start; | |
3371 | } else if (!rdev->mddev->external) { | |
3372 | return -EBUSY; | |
3373 | } | |
3374 | rdev->ppl.sector = sector; | |
3375 | return len; | |
3376 | } | |
3377 | ||
3378 | static struct rdev_sysfs_entry rdev_ppl_sector = | |
3379 | __ATTR(ppl_sector, S_IRUGO|S_IWUSR, ppl_sector_show, ppl_sector_store); | |
3380 | ||
3381 | static ssize_t | |
3382 | ppl_size_show(struct md_rdev *rdev, char *page) | |
3383 | { | |
3384 | return sprintf(page, "%u\n", rdev->ppl.size); | |
3385 | } | |
3386 | ||
3387 | static ssize_t | |
3388 | ppl_size_store(struct md_rdev *rdev, const char *buf, size_t len) | |
3389 | { | |
3390 | unsigned int size; | |
3391 | ||
3392 | if (kstrtouint(buf, 10, &size) < 0) | |
3393 | return -EINVAL; | |
3394 | ||
3395 | if (rdev->mddev->pers && test_bit(MD_HAS_PPL, &rdev->mddev->flags) && | |
3396 | rdev->raid_disk >= 0) | |
3397 | return -EBUSY; | |
3398 | ||
3399 | if (rdev->mddev->persistent) { | |
3400 | if (rdev->mddev->major_version == 0) | |
3401 | return -EINVAL; | |
3402 | if (size > U16_MAX) | |
3403 | return -EINVAL; | |
3404 | } else if (!rdev->mddev->external) { | |
3405 | return -EBUSY; | |
3406 | } | |
3407 | rdev->ppl.size = size; | |
3408 | return len; | |
3409 | } | |
3410 | ||
3411 | static struct rdev_sysfs_entry rdev_ppl_size = | |
3412 | __ATTR(ppl_size, S_IRUGO|S_IWUSR, ppl_size_show, ppl_size_store); | |
3413 | ||
86e6ffdd N |
3414 | static struct attribute *rdev_default_attrs[] = { |
3415 | &rdev_state.attr, | |
4dbcdc75 | 3416 | &rdev_errors.attr, |
014236d2 | 3417 | &rdev_slot.attr, |
93c8cad0 | 3418 | &rdev_offset.attr, |
c6563a8c | 3419 | &rdev_new_offset.attr, |
83303b61 | 3420 | &rdev_size.attr, |
06e3c817 | 3421 | &rdev_recovery_start.attr, |
16c791a5 N |
3422 | &rdev_bad_blocks.attr, |
3423 | &rdev_unack_bad_blocks.attr, | |
664aed04 AP |
3424 | &rdev_ppl_sector.attr, |
3425 | &rdev_ppl_size.attr, | |
86e6ffdd N |
3426 | NULL, |
3427 | }; | |
3428 | static ssize_t | |
3429 | rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
3430 | { | |
3431 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3432 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
86e6ffdd N |
3433 | |
3434 | if (!entry->show) | |
3435 | return -EIO; | |
758bfc8a | 3436 | if (!rdev->mddev) |
168b305b | 3437 | return -ENODEV; |
758bfc8a | 3438 | return entry->show(rdev, page); |
86e6ffdd N |
3439 | } |
3440 | ||
3441 | static ssize_t | |
3442 | rdev_attr_store(struct kobject *kobj, struct attribute *attr, | |
3443 | const char *page, size_t length) | |
3444 | { | |
3445 | struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); | |
3cb03002 | 3446 | struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); |
27c529bb | 3447 | ssize_t rv; |
fd01b88c | 3448 | struct mddev *mddev = rdev->mddev; |
86e6ffdd N |
3449 | |
3450 | if (!entry->store) | |
3451 | return -EIO; | |
67463acb N |
3452 | if (!capable(CAP_SYS_ADMIN)) |
3453 | return -EACCES; | |
c42d3240 | 3454 | rv = mddev ? mddev_lock(mddev) : -ENODEV; |
ca388059 | 3455 | if (!rv) { |
27c529bb | 3456 | if (rdev->mddev == NULL) |
c42d3240 | 3457 | rv = -ENODEV; |
27c529bb N |
3458 | else |
3459 | rv = entry->store(rdev, page, length); | |
6a51830e | 3460 | mddev_unlock(mddev); |
ca388059 N |
3461 | } |
3462 | return rv; | |
86e6ffdd N |
3463 | } |
3464 | ||
3465 | static void rdev_free(struct kobject *ko) | |
3466 | { | |
3cb03002 | 3467 | struct md_rdev *rdev = container_of(ko, struct md_rdev, kobj); |
86e6ffdd N |
3468 | kfree(rdev); |
3469 | } | |
52cf25d0 | 3470 | static const struct sysfs_ops rdev_sysfs_ops = { |
86e6ffdd N |
3471 | .show = rdev_attr_show, |
3472 | .store = rdev_attr_store, | |
3473 | }; | |
3474 | static struct kobj_type rdev_ktype = { | |
3475 | .release = rdev_free, | |
3476 | .sysfs_ops = &rdev_sysfs_ops, | |
3477 | .default_attrs = rdev_default_attrs, | |
3478 | }; | |
3479 | ||
3cb03002 | 3480 | int md_rdev_init(struct md_rdev *rdev) |
e8bb9a83 N |
3481 | { |
3482 | rdev->desc_nr = -1; | |
3483 | rdev->saved_raid_disk = -1; | |
3484 | rdev->raid_disk = -1; | |
3485 | rdev->flags = 0; | |
3486 | rdev->data_offset = 0; | |
c6563a8c | 3487 | rdev->new_data_offset = 0; |
e8bb9a83 | 3488 | rdev->sb_events = 0; |
0e3ef49e | 3489 | rdev->last_read_error = 0; |
2699b672 N |
3490 | rdev->sb_loaded = 0; |
3491 | rdev->bb_page = NULL; | |
e8bb9a83 N |
3492 | atomic_set(&rdev->nr_pending, 0); |
3493 | atomic_set(&rdev->read_errors, 0); | |
3494 | atomic_set(&rdev->corrected_errors, 0); | |
3495 | ||
3496 | INIT_LIST_HEAD(&rdev->same_set); | |
3497 | init_waitqueue_head(&rdev->blocked_wait); | |
2230dfe4 N |
3498 | |
3499 | /* Add space to store bad block list. | |
3500 | * This reserves the space even on arrays where it cannot | |
3501 | * be used - I wonder if that matters | |
3502 | */ | |
fc974ee2 | 3503 | return badblocks_init(&rdev->badblocks, 0); |
e8bb9a83 N |
3504 | } |
3505 | EXPORT_SYMBOL_GPL(md_rdev_init); | |
1da177e4 LT |
3506 | /* |
3507 | * Import a device. If 'super_format' >= 0, then sanity check the superblock | |
3508 | * | |
3509 | * mark the device faulty if: | |
3510 | * | |
3511 | * - the device is nonexistent (zero size) | |
3512 | * - the device has no valid superblock | |
3513 | * | |
3514 | * a faulty rdev _never_ has rdev->sb set. | |
3515 | */ | |
3cb03002 | 3516 | static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) |
1da177e4 LT |
3517 | { |
3518 | char b[BDEVNAME_SIZE]; | |
3519 | int err; | |
3cb03002 | 3520 | struct md_rdev *rdev; |
1da177e4 LT |
3521 | sector_t size; |
3522 | ||
9ffae0cf | 3523 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
9d48739e | 3524 | if (!rdev) |
1da177e4 | 3525 | return ERR_PTR(-ENOMEM); |
1da177e4 | 3526 | |
2230dfe4 N |
3527 | err = md_rdev_init(rdev); |
3528 | if (err) | |
3529 | goto abort_free; | |
3530 | err = alloc_disk_sb(rdev); | |
3531 | if (err) | |
1da177e4 LT |
3532 | goto abort_free; |
3533 | ||
c5d79adb | 3534 | err = lock_rdev(rdev, newdev, super_format == -2); |
1da177e4 LT |
3535 | if (err) |
3536 | goto abort_free; | |
3537 | ||
f9cb074b | 3538 | kobject_init(&rdev->kobj, &rdev_ktype); |
86e6ffdd | 3539 | |
77304d2a | 3540 | size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; |
1da177e4 | 3541 | if (!size) { |
9d48739e | 3542 | pr_warn("md: %s has zero or unknown size, marking faulty!\n", |
1da177e4 LT |
3543 | bdevname(rdev->bdev,b)); |
3544 | err = -EINVAL; | |
3545 | goto abort_free; | |
3546 | } | |
3547 | ||
3548 | if (super_format >= 0) { | |
3549 | err = super_types[super_format]. | |
3550 | load_super(rdev, NULL, super_minor); | |
3551 | if (err == -EINVAL) { | |
9d48739e | 3552 | pr_warn("md: %s does not have a valid v%d.%d superblock, not importing!\n", |
df968c4e | 3553 | bdevname(rdev->bdev,b), |
9d48739e | 3554 | super_format, super_minor); |
1da177e4 LT |
3555 | goto abort_free; |
3556 | } | |
3557 | if (err < 0) { | |
9d48739e | 3558 | pr_warn("md: could not read %s's sb, not importing!\n", |
1da177e4 LT |
3559 | bdevname(rdev->bdev,b)); |
3560 | goto abort_free; | |
3561 | } | |
3562 | } | |
6bfe0b49 | 3563 | |
1da177e4 LT |
3564 | return rdev; |
3565 | ||
3566 | abort_free: | |
2699b672 N |
3567 | if (rdev->bdev) |
3568 | unlock_rdev(rdev); | |
545c8795 | 3569 | md_rdev_clear(rdev); |
1da177e4 LT |
3570 | kfree(rdev); |
3571 | return ERR_PTR(err); | |
3572 | } | |
3573 | ||
3574 | /* | |
3575 | * Check a full RAID array for plausibility | |
3576 | */ | |
3577 | ||
f72ffdd6 | 3578 | static void analyze_sbs(struct mddev *mddev) |
1da177e4 LT |
3579 | { |
3580 | int i; | |
3cb03002 | 3581 | struct md_rdev *rdev, *freshest, *tmp; |
1da177e4 LT |
3582 | char b[BDEVNAME_SIZE]; |
3583 | ||
3584 | freshest = NULL; | |
dafb20fa | 3585 | rdev_for_each_safe(rdev, tmp, mddev) |
1da177e4 LT |
3586 | switch (super_types[mddev->major_version]. |
3587 | load_super(rdev, freshest, mddev->minor_version)) { | |
3588 | case 1: | |
3589 | freshest = rdev; | |
3590 | break; | |
3591 | case 0: | |
3592 | break; | |
3593 | default: | |
9d48739e | 3594 | pr_warn("md: fatal superblock inconsistency in %s -- removing from array\n", |
1da177e4 | 3595 | bdevname(rdev->bdev,b)); |
fb56dfef | 3596 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3597 | } |
3598 | ||
1da177e4 LT |
3599 | super_types[mddev->major_version]. |
3600 | validate_super(mddev, freshest); | |
3601 | ||
3602 | i = 0; | |
dafb20fa | 3603 | rdev_for_each_safe(rdev, tmp, mddev) { |
233fca36 N |
3604 | if (mddev->max_disks && |
3605 | (rdev->desc_nr >= mddev->max_disks || | |
3606 | i > mddev->max_disks)) { | |
9d48739e N |
3607 | pr_warn("md: %s: %s: only %d devices permitted\n", |
3608 | mdname(mddev), bdevname(rdev->bdev, b), | |
3609 | mddev->max_disks); | |
fb56dfef | 3610 | md_kick_rdev_from_array(rdev); |
de01dfad N |
3611 | continue; |
3612 | } | |
1aee41f6 | 3613 | if (rdev != freshest) { |
1da177e4 LT |
3614 | if (super_types[mddev->major_version]. |
3615 | validate_super(mddev, rdev)) { | |
9d48739e | 3616 | pr_warn("md: kicking non-fresh %s from array!\n", |
1da177e4 | 3617 | bdevname(rdev->bdev,b)); |
fb56dfef | 3618 | md_kick_rdev_from_array(rdev); |
1da177e4 LT |
3619 | continue; |
3620 | } | |
1aee41f6 | 3621 | } |
1da177e4 LT |
3622 | if (mddev->level == LEVEL_MULTIPATH) { |
3623 | rdev->desc_nr = i++; | |
3624 | rdev->raid_disk = rdev->desc_nr; | |
b2d444d7 | 3625 | set_bit(In_sync, &rdev->flags); |
f2076e7d SL |
3626 | } else if (rdev->raid_disk >= |
3627 | (mddev->raid_disks - min(0, mddev->delta_disks)) && | |
3628 | !test_bit(Journal, &rdev->flags)) { | |
a778b73f N |
3629 | rdev->raid_disk = -1; |
3630 | clear_bit(In_sync, &rdev->flags); | |
1da177e4 LT |
3631 | } |
3632 | } | |
1da177e4 LT |
3633 | } |
3634 | ||
72e02075 N |
3635 | /* Read a fixed-point number. |
3636 | * Numbers in sysfs attributes should be in "standard" units where | |
3637 | * possible, so time should be in seconds. | |
f72ffdd6 | 3638 | * However we internally use a a much smaller unit such as |
72e02075 N |
3639 | * milliseconds or jiffies. |
3640 | * This function takes a decimal number with a possible fractional | |
3641 | * component, and produces an integer which is the result of | |
3642 | * multiplying that number by 10^'scale'. | |
3643 | * all without any floating-point arithmetic. | |
3644 | */ | |
3645 | int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale) | |
3646 | { | |
3647 | unsigned long result = 0; | |
3648 | long decimals = -1; | |
3649 | while (isdigit(*cp) || (*cp == '.' && decimals < 0)) { | |
3650 | if (*cp == '.') | |
3651 | decimals = 0; | |
3652 | else if (decimals < scale) { | |
3653 | unsigned int value; | |
3654 | value = *cp - '0'; | |
3655 | result = result * 10 + value; | |
3656 | if (decimals >= 0) | |
3657 | decimals++; | |
3658 | } | |
3659 | cp++; | |
3660 | } | |
3661 | if (*cp == '\n') | |
3662 | cp++; | |
3663 | if (*cp) | |
3664 | return -EINVAL; | |
3665 | if (decimals < 0) | |
3666 | decimals = 0; | |
cf891607 | 3667 | *res = result * int_pow(10, scale - decimals); |
72e02075 N |
3668 | return 0; |
3669 | } | |
3670 | ||
16f17b39 | 3671 | static ssize_t |
fd01b88c | 3672 | safe_delay_show(struct mddev *mddev, char *page) |
16f17b39 N |
3673 | { |
3674 | int msec = (mddev->safemode_delay*1000)/HZ; | |
3675 | return sprintf(page, "%d.%03d\n", msec/1000, msec%1000); | |
3676 | } | |
3677 | static ssize_t | |
fd01b88c | 3678 | safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len) |
16f17b39 | 3679 | { |
16f17b39 | 3680 | unsigned long msec; |
97ce0a7f | 3681 | |
28c1b9fd | 3682 | if (mddev_is_clustered(mddev)) { |
9d48739e | 3683 | pr_warn("md: Safemode is disabled for clustered mode\n"); |
28c1b9fd GR |
3684 | return -EINVAL; |
3685 | } | |
3686 | ||
72e02075 | 3687 | if (strict_strtoul_scaled(cbuf, &msec, 3) < 0) |
16f17b39 | 3688 | return -EINVAL; |
16f17b39 N |
3689 | if (msec == 0) |
3690 | mddev->safemode_delay = 0; | |
3691 | else { | |
19052c0e | 3692 | unsigned long old_delay = mddev->safemode_delay; |
1b30e66f N |
3693 | unsigned long new_delay = (msec*HZ)/1000; |
3694 | ||
3695 | if (new_delay == 0) | |
3696 | new_delay = 1; | |
3697 | mddev->safemode_delay = new_delay; | |
3698 | if (new_delay < old_delay || old_delay == 0) | |
3699 | mod_timer(&mddev->safemode_timer, jiffies+1); | |
16f17b39 N |
3700 | } |
3701 | return len; | |
3702 | } | |
3703 | static struct md_sysfs_entry md_safe_delay = | |
80ca3a44 | 3704 | __ATTR(safe_mode_delay, S_IRUGO|S_IWUSR,safe_delay_show, safe_delay_store); |
16f17b39 | 3705 | |
eae1701f | 3706 | static ssize_t |
fd01b88c | 3707 | level_show(struct mddev *mddev, char *page) |
eae1701f | 3708 | { |
36d091f4 N |
3709 | struct md_personality *p; |
3710 | int ret; | |
3711 | spin_lock(&mddev->lock); | |
3712 | p = mddev->pers; | |
d9d166c2 | 3713 | if (p) |
36d091f4 | 3714 | ret = sprintf(page, "%s\n", p->name); |
d9d166c2 | 3715 | else if (mddev->clevel[0]) |
36d091f4 | 3716 | ret = sprintf(page, "%s\n", mddev->clevel); |
d9d166c2 | 3717 | else if (mddev->level != LEVEL_NONE) |
36d091f4 | 3718 | ret = sprintf(page, "%d\n", mddev->level); |
d9d166c2 | 3719 | else |
36d091f4 N |
3720 | ret = 0; |
3721 | spin_unlock(&mddev->lock); | |
3722 | return ret; | |
eae1701f N |
3723 | } |
3724 | ||
d9d166c2 | 3725 | static ssize_t |
fd01b88c | 3726 | level_store(struct mddev *mddev, const char *buf, size_t len) |
d9d166c2 | 3727 | { |
f2859af6 | 3728 | char clevel[16]; |
6791875e N |
3729 | ssize_t rv; |
3730 | size_t slen = len; | |
db721d32 | 3731 | struct md_personality *pers, *oldpers; |
f2859af6 | 3732 | long level; |
db721d32 | 3733 | void *priv, *oldpriv; |
3cb03002 | 3734 | struct md_rdev *rdev; |
245f46c2 | 3735 | |
6791875e N |
3736 | if (slen == 0 || slen >= sizeof(clevel)) |
3737 | return -EINVAL; | |
3738 | ||
3739 | rv = mddev_lock(mddev); | |
3740 | if (rv) | |
3741 | return rv; | |
3742 | ||
245f46c2 | 3743 | if (mddev->pers == NULL) { |
6791875e N |
3744 | strncpy(mddev->clevel, buf, slen); |
3745 | if (mddev->clevel[slen-1] == '\n') | |
3746 | slen--; | |
3747 | mddev->clevel[slen] = 0; | |
245f46c2 | 3748 | mddev->level = LEVEL_NONE; |
6791875e N |
3749 | rv = len; |
3750 | goto out_unlock; | |
245f46c2 | 3751 | } |
6791875e | 3752 | rv = -EROFS; |
bd8839e0 | 3753 | if (mddev->ro) |
6791875e | 3754 | goto out_unlock; |
245f46c2 N |
3755 | |
3756 | /* request to change the personality. Need to ensure: | |
3757 | * - array is not engaged in resync/recovery/reshape | |
3758 | * - old personality can be suspended | |
3759 | * - new personality will access other array. | |
3760 | */ | |
3761 | ||
6791875e | 3762 | rv = -EBUSY; |
bb4f1e9d | 3763 | if (mddev->sync_thread || |
f851b60d | 3764 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
bb4f1e9d N |
3765 | mddev->reshape_position != MaxSector || |
3766 | mddev->sysfs_active) | |
6791875e | 3767 | goto out_unlock; |
245f46c2 | 3768 | |
6791875e | 3769 | rv = -EINVAL; |
245f46c2 | 3770 | if (!mddev->pers->quiesce) { |
9d48739e N |
3771 | pr_warn("md: %s: %s does not support online personality change\n", |
3772 | mdname(mddev), mddev->pers->name); | |
6791875e | 3773 | goto out_unlock; |
245f46c2 N |
3774 | } |
3775 | ||
3776 | /* Now find the new personality */ | |
6791875e N |
3777 | strncpy(clevel, buf, slen); |
3778 | if (clevel[slen-1] == '\n') | |
3779 | slen--; | |
3780 | clevel[slen] = 0; | |
b29bebd6 | 3781 | if (kstrtol(clevel, 10, &level)) |
f2859af6 | 3782 | level = LEVEL_NONE; |
245f46c2 | 3783 | |
f2859af6 DW |
3784 | if (request_module("md-%s", clevel) != 0) |
3785 | request_module("md-level-%s", clevel); | |
245f46c2 | 3786 | spin_lock(&pers_lock); |
f2859af6 | 3787 | pers = find_pers(level, clevel); |
245f46c2 N |
3788 | if (!pers || !try_module_get(pers->owner)) { |
3789 | spin_unlock(&pers_lock); | |
9d48739e | 3790 | pr_warn("md: personality %s not loaded\n", clevel); |
6791875e N |
3791 | rv = -EINVAL; |
3792 | goto out_unlock; | |
245f46c2 N |
3793 | } |
3794 | spin_unlock(&pers_lock); | |
3795 | ||
3796 | if (pers == mddev->pers) { | |
3797 | /* Nothing to do! */ | |
3798 | module_put(pers->owner); | |
6791875e N |
3799 | rv = len; |
3800 | goto out_unlock; | |
245f46c2 N |
3801 | } |
3802 | if (!pers->takeover) { | |
3803 | module_put(pers->owner); | |
9d48739e N |
3804 | pr_warn("md: %s: %s does not support personality takeover\n", |
3805 | mdname(mddev), clevel); | |
6791875e N |
3806 | rv = -EINVAL; |
3807 | goto out_unlock; | |
245f46c2 N |
3808 | } |
3809 | ||
dafb20fa | 3810 | rdev_for_each(rdev, mddev) |
e93f68a1 N |
3811 | rdev->new_raid_disk = rdev->raid_disk; |
3812 | ||
245f46c2 N |
3813 | /* ->takeover must set new_* and/or delta_disks |
3814 | * if it succeeds, and may set them when it fails. | |
3815 | */ | |
3816 | priv = pers->takeover(mddev); | |
3817 | if (IS_ERR(priv)) { | |
3818 | mddev->new_level = mddev->level; | |
3819 | mddev->new_layout = mddev->layout; | |
664e7c41 | 3820 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
245f46c2 N |
3821 | mddev->raid_disks -= mddev->delta_disks; |
3822 | mddev->delta_disks = 0; | |
2c810cdd | 3823 | mddev->reshape_backwards = 0; |
245f46c2 | 3824 | module_put(pers->owner); |
9d48739e N |
3825 | pr_warn("md: %s: %s would not accept array\n", |
3826 | mdname(mddev), clevel); | |
6791875e N |
3827 | rv = PTR_ERR(priv); |
3828 | goto out_unlock; | |
245f46c2 N |
3829 | } |
3830 | ||
3831 | /* Looks like we have a winner */ | |
3832 | mddev_suspend(mddev); | |
5aa61f42 | 3833 | mddev_detach(mddev); |
36d091f4 N |
3834 | |
3835 | spin_lock(&mddev->lock); | |
db721d32 N |
3836 | oldpers = mddev->pers; |
3837 | oldpriv = mddev->private; | |
3838 | mddev->pers = pers; | |
3839 | mddev->private = priv; | |
3840 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); | |
3841 | mddev->level = mddev->new_level; | |
3842 | mddev->layout = mddev->new_layout; | |
3843 | mddev->chunk_sectors = mddev->new_chunk_sectors; | |
3844 | mddev->delta_disks = 0; | |
3845 | mddev->reshape_backwards = 0; | |
3846 | mddev->degraded = 0; | |
36d091f4 | 3847 | spin_unlock(&mddev->lock); |
db721d32 N |
3848 | |
3849 | if (oldpers->sync_request == NULL && | |
3850 | mddev->external) { | |
3851 | /* We are converting from a no-redundancy array | |
3852 | * to a redundancy array and metadata is managed | |
3853 | * externally so we need to be sure that writes | |
3854 | * won't block due to a need to transition | |
3855 | * clean->dirty | |
3856 | * until external management is started. | |
3857 | */ | |
3858 | mddev->in_sync = 0; | |
3859 | mddev->safemode_delay = 0; | |
3860 | mddev->safemode = 0; | |
3861 | } | |
f72ffdd6 | 3862 | |
db721d32 N |
3863 | oldpers->free(mddev, oldpriv); |
3864 | ||
3865 | if (oldpers->sync_request == NULL && | |
a64c876f N |
3866 | pers->sync_request != NULL) { |
3867 | /* need to add the md_redundancy_group */ | |
3868 | if (sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
3869 | pr_warn("md: cannot register extra attributes for %s\n", |
3870 | mdname(mddev)); | |
388975cc | 3871 | mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action"); |
f72ffdd6 | 3872 | } |
db721d32 | 3873 | if (oldpers->sync_request != NULL && |
a64c876f N |
3874 | pers->sync_request == NULL) { |
3875 | /* need to remove the md_redundancy_group */ | |
3876 | if (mddev->to_remove == NULL) | |
3877 | mddev->to_remove = &md_redundancy_group; | |
3878 | } | |
3879 | ||
4cb9da7d AO |
3880 | module_put(oldpers->owner); |
3881 | ||
dafb20fa | 3882 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3883 | if (rdev->raid_disk < 0) |
3884 | continue; | |
bf2cb0da | 3885 | if (rdev->new_raid_disk >= mddev->raid_disks) |
e93f68a1 N |
3886 | rdev->new_raid_disk = -1; |
3887 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3888 | continue; | |
36fad858 | 3889 | sysfs_unlink_rdev(mddev, rdev); |
e93f68a1 | 3890 | } |
dafb20fa | 3891 | rdev_for_each(rdev, mddev) { |
e93f68a1 N |
3892 | if (rdev->raid_disk < 0) |
3893 | continue; | |
3894 | if (rdev->new_raid_disk == rdev->raid_disk) | |
3895 | continue; | |
3896 | rdev->raid_disk = rdev->new_raid_disk; | |
3897 | if (rdev->raid_disk < 0) | |
3a981b03 | 3898 | clear_bit(In_sync, &rdev->flags); |
e93f68a1 | 3899 | else { |
36fad858 | 3900 | if (sysfs_link_rdev(mddev, rdev)) |
9d48739e N |
3901 | pr_warn("md: cannot register rd%d for %s after level change\n", |
3902 | rdev->raid_disk, mdname(mddev)); | |
3a981b03 | 3903 | } |
e93f68a1 N |
3904 | } |
3905 | ||
db721d32 | 3906 | if (pers->sync_request == NULL) { |
9af204cf TM |
3907 | /* this is now an array without redundancy, so |
3908 | * it must always be in_sync | |
3909 | */ | |
3910 | mddev->in_sync = 1; | |
3911 | del_timer_sync(&mddev->safemode_timer); | |
3912 | } | |
02e5f5c0 | 3913 | blk_set_stacking_limits(&mddev->queue->limits); |
245f46c2 | 3914 | pers->run(mddev); |
2953079c | 3915 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
47525e59 | 3916 | mddev_resume(mddev); |
830778a1 N |
3917 | if (!mddev->thread) |
3918 | md_update_sb(mddev, 1); | |
5cac7861 | 3919 | sysfs_notify(&mddev->kobj, NULL, "level"); |
bb7f8d22 | 3920 | md_new_event(mddev); |
6791875e N |
3921 | rv = len; |
3922 | out_unlock: | |
3923 | mddev_unlock(mddev); | |
d9d166c2 N |
3924 | return rv; |
3925 | } | |
3926 | ||
3927 | static struct md_sysfs_entry md_level = | |
80ca3a44 | 3928 | __ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); |
eae1701f | 3929 | |
d4dbd025 | 3930 | static ssize_t |
fd01b88c | 3931 | layout_show(struct mddev *mddev, char *page) |
d4dbd025 N |
3932 | { |
3933 | /* just a number, not meaningful for all levels */ | |
08a02ecd N |
3934 | if (mddev->reshape_position != MaxSector && |
3935 | mddev->layout != mddev->new_layout) | |
3936 | return sprintf(page, "%d (%d)\n", | |
3937 | mddev->new_layout, mddev->layout); | |
d4dbd025 N |
3938 | return sprintf(page, "%d\n", mddev->layout); |
3939 | } | |
3940 | ||
3941 | static ssize_t | |
fd01b88c | 3942 | layout_store(struct mddev *mddev, const char *buf, size_t len) |
d4dbd025 | 3943 | { |
4c9309c0 | 3944 | unsigned int n; |
6791875e | 3945 | int err; |
d4dbd025 | 3946 | |
4c9309c0 AD |
3947 | err = kstrtouint(buf, 10, &n); |
3948 | if (err < 0) | |
3949 | return err; | |
6791875e N |
3950 | err = mddev_lock(mddev); |
3951 | if (err) | |
3952 | return err; | |
d4dbd025 | 3953 | |
b3546035 | 3954 | if (mddev->pers) { |
50ac168a | 3955 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
3956 | err = -EBUSY; |
3957 | else if (mddev->ro) | |
3958 | err = -EROFS; | |
3959 | else { | |
3960 | mddev->new_layout = n; | |
3961 | err = mddev->pers->check_reshape(mddev); | |
3962 | if (err) | |
3963 | mddev->new_layout = mddev->layout; | |
597a711b | 3964 | } |
b3546035 | 3965 | } else { |
08a02ecd | 3966 | mddev->new_layout = n; |
b3546035 N |
3967 | if (mddev->reshape_position == MaxSector) |
3968 | mddev->layout = n; | |
3969 | } | |
6791875e N |
3970 | mddev_unlock(mddev); |
3971 | return err ?: len; | |
d4dbd025 N |
3972 | } |
3973 | static struct md_sysfs_entry md_layout = | |
80ca3a44 | 3974 | __ATTR(layout, S_IRUGO|S_IWUSR, layout_show, layout_store); |
d4dbd025 | 3975 | |
eae1701f | 3976 | static ssize_t |
fd01b88c | 3977 | raid_disks_show(struct mddev *mddev, char *page) |
eae1701f | 3978 | { |
bb636547 N |
3979 | if (mddev->raid_disks == 0) |
3980 | return 0; | |
08a02ecd N |
3981 | if (mddev->reshape_position != MaxSector && |
3982 | mddev->delta_disks != 0) | |
3983 | return sprintf(page, "%d (%d)\n", mddev->raid_disks, | |
3984 | mddev->raid_disks - mddev->delta_disks); | |
eae1701f N |
3985 | return sprintf(page, "%d\n", mddev->raid_disks); |
3986 | } | |
3987 | ||
fd01b88c | 3988 | static int update_raid_disks(struct mddev *mddev, int raid_disks); |
da943b99 N |
3989 | |
3990 | static ssize_t | |
fd01b88c | 3991 | raid_disks_store(struct mddev *mddev, const char *buf, size_t len) |
da943b99 | 3992 | { |
4c9309c0 | 3993 | unsigned int n; |
6791875e | 3994 | int err; |
da943b99 | 3995 | |
4c9309c0 AD |
3996 | err = kstrtouint(buf, 10, &n); |
3997 | if (err < 0) | |
3998 | return err; | |
da943b99 | 3999 | |
6791875e N |
4000 | err = mddev_lock(mddev); |
4001 | if (err) | |
4002 | return err; | |
da943b99 | 4003 | if (mddev->pers) |
6791875e | 4004 | err = update_raid_disks(mddev, n); |
08a02ecd | 4005 | else if (mddev->reshape_position != MaxSector) { |
c6563a8c | 4006 | struct md_rdev *rdev; |
08a02ecd | 4007 | int olddisks = mddev->raid_disks - mddev->delta_disks; |
c6563a8c | 4008 | |
6791875e | 4009 | err = -EINVAL; |
c6563a8c N |
4010 | rdev_for_each(rdev, mddev) { |
4011 | if (olddisks < n && | |
4012 | rdev->data_offset < rdev->new_data_offset) | |
6791875e | 4013 | goto out_unlock; |
c6563a8c N |
4014 | if (olddisks > n && |
4015 | rdev->data_offset > rdev->new_data_offset) | |
6791875e | 4016 | goto out_unlock; |
c6563a8c | 4017 | } |
6791875e | 4018 | err = 0; |
08a02ecd N |
4019 | mddev->delta_disks = n - olddisks; |
4020 | mddev->raid_disks = n; | |
2c810cdd | 4021 | mddev->reshape_backwards = (mddev->delta_disks < 0); |
08a02ecd | 4022 | } else |
da943b99 | 4023 | mddev->raid_disks = n; |
6791875e N |
4024 | out_unlock: |
4025 | mddev_unlock(mddev); | |
4026 | return err ? err : len; | |
da943b99 N |
4027 | } |
4028 | static struct md_sysfs_entry md_raid_disks = | |
80ca3a44 | 4029 | __ATTR(raid_disks, S_IRUGO|S_IWUSR, raid_disks_show, raid_disks_store); |
eae1701f | 4030 | |
3b34380a | 4031 | static ssize_t |
fd01b88c | 4032 | chunk_size_show(struct mddev *mddev, char *page) |
3b34380a | 4033 | { |
08a02ecd | 4034 | if (mddev->reshape_position != MaxSector && |
664e7c41 AN |
4035 | mddev->chunk_sectors != mddev->new_chunk_sectors) |
4036 | return sprintf(page, "%d (%d)\n", | |
4037 | mddev->new_chunk_sectors << 9, | |
9d8f0363 AN |
4038 | mddev->chunk_sectors << 9); |
4039 | return sprintf(page, "%d\n", mddev->chunk_sectors << 9); | |
3b34380a N |
4040 | } |
4041 | ||
4042 | static ssize_t | |
fd01b88c | 4043 | chunk_size_store(struct mddev *mddev, const char *buf, size_t len) |
3b34380a | 4044 | { |
4c9309c0 | 4045 | unsigned long n; |
6791875e | 4046 | int err; |
3b34380a | 4047 | |
4c9309c0 AD |
4048 | err = kstrtoul(buf, 10, &n); |
4049 | if (err < 0) | |
4050 | return err; | |
3b34380a | 4051 | |
6791875e N |
4052 | err = mddev_lock(mddev); |
4053 | if (err) | |
4054 | return err; | |
b3546035 | 4055 | if (mddev->pers) { |
50ac168a | 4056 | if (mddev->pers->check_reshape == NULL) |
6791875e N |
4057 | err = -EBUSY; |
4058 | else if (mddev->ro) | |
4059 | err = -EROFS; | |
4060 | else { | |
4061 | mddev->new_chunk_sectors = n >> 9; | |
4062 | err = mddev->pers->check_reshape(mddev); | |
4063 | if (err) | |
4064 | mddev->new_chunk_sectors = mddev->chunk_sectors; | |
597a711b | 4065 | } |
b3546035 | 4066 | } else { |
664e7c41 | 4067 | mddev->new_chunk_sectors = n >> 9; |
b3546035 | 4068 | if (mddev->reshape_position == MaxSector) |
9d8f0363 | 4069 | mddev->chunk_sectors = n >> 9; |
b3546035 | 4070 | } |
6791875e N |
4071 | mddev_unlock(mddev); |
4072 | return err ?: len; | |
3b34380a N |
4073 | } |
4074 | static struct md_sysfs_entry md_chunk_size = | |
80ca3a44 | 4075 | __ATTR(chunk_size, S_IRUGO|S_IWUSR, chunk_size_show, chunk_size_store); |
3b34380a | 4076 | |
a94213b1 | 4077 | static ssize_t |
fd01b88c | 4078 | resync_start_show(struct mddev *mddev, char *page) |
a94213b1 | 4079 | { |
d1a7c503 N |
4080 | if (mddev->recovery_cp == MaxSector) |
4081 | return sprintf(page, "none\n"); | |
a94213b1 N |
4082 | return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp); |
4083 | } | |
4084 | ||
4085 | static ssize_t | |
fd01b88c | 4086 | resync_start_store(struct mddev *mddev, const char *buf, size_t len) |
a94213b1 | 4087 | { |
4c9309c0 | 4088 | unsigned long long n; |
6791875e | 4089 | int err; |
4c9309c0 AD |
4090 | |
4091 | if (cmd_match(buf, "none")) | |
4092 | n = MaxSector; | |
4093 | else { | |
4094 | err = kstrtoull(buf, 10, &n); | |
4095 | if (err < 0) | |
4096 | return err; | |
4097 | if (n != (sector_t)n) | |
4098 | return -EINVAL; | |
4099 | } | |
a94213b1 | 4100 | |
6791875e N |
4101 | err = mddev_lock(mddev); |
4102 | if (err) | |
4103 | return err; | |
b098636c | 4104 | if (mddev->pers && !test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) |
6791875e | 4105 | err = -EBUSY; |
a94213b1 | 4106 | |
6791875e N |
4107 | if (!err) { |
4108 | mddev->recovery_cp = n; | |
4109 | if (mddev->pers) | |
2953079c | 4110 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
6791875e N |
4111 | } |
4112 | mddev_unlock(mddev); | |
4113 | return err ?: len; | |
a94213b1 N |
4114 | } |
4115 | static struct md_sysfs_entry md_resync_start = | |
750f199e N |
4116 | __ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR, |
4117 | resync_start_show, resync_start_store); | |
a94213b1 | 4118 | |
9e653b63 N |
4119 | /* |
4120 | * The array state can be: | |
4121 | * | |
4122 | * clear | |
4123 | * No devices, no size, no level | |
4124 | * Equivalent to STOP_ARRAY ioctl | |
4125 | * inactive | |
4126 | * May have some settings, but array is not active | |
4127 | * all IO results in error | |
4128 | * When written, doesn't tear down array, but just stops it | |
4129 | * suspended (not supported yet) | |
4130 | * All IO requests will block. The array can be reconfigured. | |
910d8cb3 | 4131 | * Writing this, if accepted, will block until array is quiescent |
9e653b63 N |
4132 | * readonly |
4133 | * no resync can happen. no superblocks get written. | |
4134 | * write requests fail | |
4135 | * read-auto | |
4136 | * like readonly, but behaves like 'clean' on a write request. | |
4137 | * | |
4138 | * clean - no pending writes, but otherwise active. | |
4139 | * When written to inactive array, starts without resync | |
4140 | * If a write request arrives then | |
4141 | * if metadata is known, mark 'dirty' and switch to 'active'. | |
4142 | * if not known, block and switch to write-pending | |
4143 | * If written to an active array that has pending writes, then fails. | |
4144 | * active | |
4145 | * fully active: IO and resync can be happening. | |
4146 | * When written to inactive array, starts with resync | |
4147 | * | |
4148 | * write-pending | |
4149 | * clean, but writes are blocked waiting for 'active' to be written. | |
4150 | * | |
4151 | * active-idle | |
4152 | * like active, but no writes have been seen for a while (100msec). | |
4153 | * | |
4154 | */ | |
4155 | enum array_state { clear, inactive, suspended, readonly, read_auto, clean, active, | |
4156 | write_pending, active_idle, bad_word}; | |
05381954 | 4157 | static char *array_states[] = { |
9e653b63 N |
4158 | "clear", "inactive", "suspended", "readonly", "read-auto", "clean", "active", |
4159 | "write-pending", "active-idle", NULL }; | |
4160 | ||
4161 | static int match_word(const char *word, char **list) | |
4162 | { | |
4163 | int n; | |
4164 | for (n=0; list[n]; n++) | |
4165 | if (cmd_match(word, list[n])) | |
4166 | break; | |
4167 | return n; | |
4168 | } | |
4169 | ||
4170 | static ssize_t | |
fd01b88c | 4171 | array_state_show(struct mddev *mddev, char *page) |
9e653b63 N |
4172 | { |
4173 | enum array_state st = inactive; | |
4174 | ||
4175 | if (mddev->pers) | |
4176 | switch(mddev->ro) { | |
4177 | case 1: | |
4178 | st = readonly; | |
4179 | break; | |
4180 | case 2: | |
4181 | st = read_auto; | |
4182 | break; | |
4183 | case 0: | |
55cc39f3 | 4184 | spin_lock(&mddev->lock); |
2953079c | 4185 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
e691063a | 4186 | st = write_pending; |
16f88949 TM |
4187 | else if (mddev->in_sync) |
4188 | st = clean; | |
9e653b63 N |
4189 | else if (mddev->safemode) |
4190 | st = active_idle; | |
4191 | else | |
4192 | st = active; | |
55cc39f3 | 4193 | spin_unlock(&mddev->lock); |
9e653b63 N |
4194 | } |
4195 | else { | |
4196 | if (list_empty(&mddev->disks) && | |
4197 | mddev->raid_disks == 0 && | |
58c0fed4 | 4198 | mddev->dev_sectors == 0) |
9e653b63 N |
4199 | st = clear; |
4200 | else | |
4201 | st = inactive; | |
4202 | } | |
4203 | return sprintf(page, "%s\n", array_states[st]); | |
4204 | } | |
4205 | ||
f72ffdd6 N |
4206 | static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); |
4207 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); | |
4208 | static int do_md_run(struct mddev *mddev); | |
fd01b88c | 4209 | static int restart_array(struct mddev *mddev); |
9e653b63 N |
4210 | |
4211 | static ssize_t | |
fd01b88c | 4212 | array_state_store(struct mddev *mddev, const char *buf, size_t len) |
9e653b63 | 4213 | { |
6497709b | 4214 | int err = 0; |
9e653b63 | 4215 | enum array_state st = match_word(buf, array_states); |
6791875e N |
4216 | |
4217 | if (mddev->pers && (st == active || st == clean) && mddev->ro != 1) { | |
4218 | /* don't take reconfig_mutex when toggling between | |
4219 | * clean and active | |
4220 | */ | |
4221 | spin_lock(&mddev->lock); | |
4222 | if (st == active) { | |
4223 | restart_array(mddev); | |
2953079c | 4224 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
91a6c4ad | 4225 | md_wakeup_thread(mddev->thread); |
6791875e | 4226 | wake_up(&mddev->sb_wait); |
6791875e N |
4227 | } else /* st == clean */ { |
4228 | restart_array(mddev); | |
6497709b | 4229 | if (!set_in_sync(mddev)) |
6791875e N |
4230 | err = -EBUSY; |
4231 | } | |
573275b5 TM |
4232 | if (!err) |
4233 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
6791875e | 4234 | spin_unlock(&mddev->lock); |
c008f1d3 | 4235 | return err ?: len; |
6791875e N |
4236 | } |
4237 | err = mddev_lock(mddev); | |
4238 | if (err) | |
4239 | return err; | |
4240 | err = -EINVAL; | |
9e653b63 N |
4241 | switch(st) { |
4242 | case bad_word: | |
4243 | break; | |
4244 | case clear: | |
4245 | /* stopping an active array */ | |
a05b7ea0 | 4246 | err = do_md_stop(mddev, 0, NULL); |
9e653b63 N |
4247 | break; |
4248 | case inactive: | |
4249 | /* stopping an active array */ | |
90cf195d | 4250 | if (mddev->pers) |
a05b7ea0 | 4251 | err = do_md_stop(mddev, 2, NULL); |
90cf195d | 4252 | else |
e691063a | 4253 | err = 0; /* already inactive */ |
9e653b63 N |
4254 | break; |
4255 | case suspended: | |
4256 | break; /* not supported yet */ | |
4257 | case readonly: | |
4258 | if (mddev->pers) | |
a05b7ea0 | 4259 | err = md_set_readonly(mddev, NULL); |
9e653b63 N |
4260 | else { |
4261 | mddev->ro = 1; | |
648b629e | 4262 | set_disk_ro(mddev->gendisk, 1); |
9e653b63 N |
4263 | err = do_md_run(mddev); |
4264 | } | |
4265 | break; | |
4266 | case read_auto: | |
9e653b63 | 4267 | if (mddev->pers) { |
80268ee9 | 4268 | if (mddev->ro == 0) |
a05b7ea0 | 4269 | err = md_set_readonly(mddev, NULL); |
80268ee9 | 4270 | else if (mddev->ro == 1) |
648b629e N |
4271 | err = restart_array(mddev); |
4272 | if (err == 0) { | |
4273 | mddev->ro = 2; | |
4274 | set_disk_ro(mddev->gendisk, 0); | |
4275 | } | |
9e653b63 N |
4276 | } else { |
4277 | mddev->ro = 2; | |
4278 | err = do_md_run(mddev); | |
4279 | } | |
4280 | break; | |
4281 | case clean: | |
4282 | if (mddev->pers) { | |
339421de SL |
4283 | err = restart_array(mddev); |
4284 | if (err) | |
4285 | break; | |
85572d7c | 4286 | spin_lock(&mddev->lock); |
6497709b | 4287 | if (!set_in_sync(mddev)) |
e691063a | 4288 | err = -EBUSY; |
85572d7c | 4289 | spin_unlock(&mddev->lock); |
5bf29597 N |
4290 | } else |
4291 | err = -EINVAL; | |
9e653b63 N |
4292 | break; |
4293 | case active: | |
4294 | if (mddev->pers) { | |
339421de SL |
4295 | err = restart_array(mddev); |
4296 | if (err) | |
4297 | break; | |
2953079c | 4298 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
9e653b63 N |
4299 | wake_up(&mddev->sb_wait); |
4300 | err = 0; | |
4301 | } else { | |
4302 | mddev->ro = 0; | |
648b629e | 4303 | set_disk_ro(mddev->gendisk, 0); |
9e653b63 N |
4304 | err = do_md_run(mddev); |
4305 | } | |
4306 | break; | |
4307 | case write_pending: | |
4308 | case active_idle: | |
4309 | /* these cannot be set */ | |
4310 | break; | |
4311 | } | |
6791875e N |
4312 | |
4313 | if (!err) { | |
1d23f178 N |
4314 | if (mddev->hold_active == UNTIL_IOCTL) |
4315 | mddev->hold_active = 0; | |
00bcb4ac | 4316 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 4317 | } |
6791875e N |
4318 | mddev_unlock(mddev); |
4319 | return err ?: len; | |
9e653b63 | 4320 | } |
80ca3a44 | 4321 | static struct md_sysfs_entry md_array_state = |
750f199e | 4322 | __ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store); |
9e653b63 | 4323 | |
1e50915f | 4324 | static ssize_t |
fd01b88c | 4325 | max_corrected_read_errors_show(struct mddev *mddev, char *page) { |
1e50915f RB |
4326 | return sprintf(page, "%d\n", |
4327 | atomic_read(&mddev->max_corr_read_errors)); | |
4328 | } | |
4329 | ||
4330 | static ssize_t | |
fd01b88c | 4331 | max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len) |
1e50915f | 4332 | { |
4c9309c0 AD |
4333 | unsigned int n; |
4334 | int rv; | |
1e50915f | 4335 | |
4c9309c0 AD |
4336 | rv = kstrtouint(buf, 10, &n); |
4337 | if (rv < 0) | |
4338 | return rv; | |
4339 | atomic_set(&mddev->max_corr_read_errors, n); | |
4340 | return len; | |
1e50915f RB |
4341 | } |
4342 | ||
4343 | static struct md_sysfs_entry max_corr_read_errors = | |
4344 | __ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show, | |
4345 | max_corrected_read_errors_store); | |
4346 | ||
6d7ff738 | 4347 | static ssize_t |
fd01b88c | 4348 | null_show(struct mddev *mddev, char *page) |
6d7ff738 N |
4349 | { |
4350 | return -EINVAL; | |
4351 | } | |
4352 | ||
4353 | static ssize_t | |
fd01b88c | 4354 | new_dev_store(struct mddev *mddev, const char *buf, size_t len) |
6d7ff738 N |
4355 | { |
4356 | /* buf must be %d:%d\n? giving major and minor numbers */ | |
4357 | /* The new device is added to the array. | |
4358 | * If the array has a persistent superblock, we read the | |
4359 | * superblock to initialise info and check validity. | |
4360 | * Otherwise, only checking done is that in bind_rdev_to_array, | |
4361 | * which mainly checks size. | |
4362 | */ | |
4363 | char *e; | |
4364 | int major = simple_strtoul(buf, &e, 10); | |
4365 | int minor; | |
4366 | dev_t dev; | |
3cb03002 | 4367 | struct md_rdev *rdev; |
6d7ff738 N |
4368 | int err; |
4369 | ||
4370 | if (!*buf || *e != ':' || !e[1] || e[1] == '\n') | |
4371 | return -EINVAL; | |
4372 | minor = simple_strtoul(e+1, &e, 10); | |
4373 | if (*e && *e != '\n') | |
4374 | return -EINVAL; | |
4375 | dev = MKDEV(major, minor); | |
4376 | if (major != MAJOR(dev) || | |
4377 | minor != MINOR(dev)) | |
4378 | return -EOVERFLOW; | |
4379 | ||
6791875e N |
4380 | flush_workqueue(md_misc_wq); |
4381 | ||
4382 | err = mddev_lock(mddev); | |
4383 | if (err) | |
4384 | return err; | |
6d7ff738 N |
4385 | if (mddev->persistent) { |
4386 | rdev = md_import_device(dev, mddev->major_version, | |
4387 | mddev->minor_version); | |
4388 | if (!IS_ERR(rdev) && !list_empty(&mddev->disks)) { | |
3cb03002 N |
4389 | struct md_rdev *rdev0 |
4390 | = list_entry(mddev->disks.next, | |
4391 | struct md_rdev, same_set); | |
6d7ff738 N |
4392 | err = super_types[mddev->major_version] |
4393 | .load_super(rdev, rdev0, mddev->minor_version); | |
4394 | if (err < 0) | |
4395 | goto out; | |
4396 | } | |
c5d79adb N |
4397 | } else if (mddev->external) |
4398 | rdev = md_import_device(dev, -2, -1); | |
4399 | else | |
6d7ff738 N |
4400 | rdev = md_import_device(dev, -1, -1); |
4401 | ||
9a8c0fa8 N |
4402 | if (IS_ERR(rdev)) { |
4403 | mddev_unlock(mddev); | |
6d7ff738 | 4404 | return PTR_ERR(rdev); |
9a8c0fa8 | 4405 | } |
6d7ff738 N |
4406 | err = bind_rdev_to_array(rdev, mddev); |
4407 | out: | |
4408 | if (err) | |
4409 | export_rdev(rdev); | |
6791875e | 4410 | mddev_unlock(mddev); |
5492c46e AO |
4411 | if (!err) |
4412 | md_new_event(mddev); | |
6d7ff738 N |
4413 | return err ? err : len; |
4414 | } | |
4415 | ||
4416 | static struct md_sysfs_entry md_new_device = | |
80ca3a44 | 4417 | __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); |
3b34380a | 4418 | |
9b1d1dac | 4419 | static ssize_t |
fd01b88c | 4420 | bitmap_store(struct mddev *mddev, const char *buf, size_t len) |
9b1d1dac PC |
4421 | { |
4422 | char *end; | |
4423 | unsigned long chunk, end_chunk; | |
6791875e | 4424 | int err; |
9b1d1dac | 4425 | |
6791875e N |
4426 | err = mddev_lock(mddev); |
4427 | if (err) | |
4428 | return err; | |
9b1d1dac PC |
4429 | if (!mddev->bitmap) |
4430 | goto out; | |
4431 | /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ | |
4432 | while (*buf) { | |
4433 | chunk = end_chunk = simple_strtoul(buf, &end, 0); | |
4434 | if (buf == end) break; | |
4435 | if (*end == '-') { /* range */ | |
4436 | buf = end + 1; | |
4437 | end_chunk = simple_strtoul(buf, &end, 0); | |
4438 | if (buf == end) break; | |
4439 | } | |
4440 | if (*end && !isspace(*end)) break; | |
e64e4018 | 4441 | md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); |
e7d2860b | 4442 | buf = skip_spaces(end); |
9b1d1dac | 4443 | } |
e64e4018 | 4444 | md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ |
9b1d1dac | 4445 | out: |
6791875e | 4446 | mddev_unlock(mddev); |
9b1d1dac PC |
4447 | return len; |
4448 | } | |
4449 | ||
4450 | static struct md_sysfs_entry md_bitmap = | |
4451 | __ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); | |
4452 | ||
a35b0d69 | 4453 | static ssize_t |
fd01b88c | 4454 | size_show(struct mddev *mddev, char *page) |
a35b0d69 | 4455 | { |
58c0fed4 AN |
4456 | return sprintf(page, "%llu\n", |
4457 | (unsigned long long)mddev->dev_sectors / 2); | |
a35b0d69 N |
4458 | } |
4459 | ||
fd01b88c | 4460 | static int update_size(struct mddev *mddev, sector_t num_sectors); |
a35b0d69 N |
4461 | |
4462 | static ssize_t | |
fd01b88c | 4463 | size_store(struct mddev *mddev, const char *buf, size_t len) |
a35b0d69 N |
4464 | { |
4465 | /* If array is inactive, we can reduce the component size, but | |
4466 | * not increase it (except from 0). | |
4467 | * If array is active, we can try an on-line resize | |
4468 | */ | |
b522adcd DW |
4469 | sector_t sectors; |
4470 | int err = strict_blocks_to_sectors(buf, §ors); | |
a35b0d69 | 4471 | |
58c0fed4 AN |
4472 | if (err < 0) |
4473 | return err; | |
6791875e N |
4474 | err = mddev_lock(mddev); |
4475 | if (err) | |
4476 | return err; | |
a35b0d69 | 4477 | if (mddev->pers) { |
58c0fed4 | 4478 | err = update_size(mddev, sectors); |
4ba1e788 XN |
4479 | if (err == 0) |
4480 | md_update_sb(mddev, 1); | |
a35b0d69 | 4481 | } else { |
58c0fed4 AN |
4482 | if (mddev->dev_sectors == 0 || |
4483 | mddev->dev_sectors > sectors) | |
4484 | mddev->dev_sectors = sectors; | |
a35b0d69 N |
4485 | else |
4486 | err = -ENOSPC; | |
4487 | } | |
6791875e | 4488 | mddev_unlock(mddev); |
a35b0d69 N |
4489 | return err ? err : len; |
4490 | } | |
4491 | ||
4492 | static struct md_sysfs_entry md_size = | |
80ca3a44 | 4493 | __ATTR(component_size, S_IRUGO|S_IWUSR, size_show, size_store); |
a35b0d69 | 4494 | |
83f0d77a | 4495 | /* Metadata version. |
e691063a N |
4496 | * This is one of |
4497 | * 'none' for arrays with no metadata (good luck...) | |
4498 | * 'external' for arrays with externally managed metadata, | |
8bb93aac N |
4499 | * or N.M for internally known formats |
4500 | */ | |
4501 | static ssize_t | |
fd01b88c | 4502 | metadata_show(struct mddev *mddev, char *page) |
8bb93aac N |
4503 | { |
4504 | if (mddev->persistent) | |
4505 | return sprintf(page, "%d.%d\n", | |
4506 | mddev->major_version, mddev->minor_version); | |
e691063a N |
4507 | else if (mddev->external) |
4508 | return sprintf(page, "external:%s\n", mddev->metadata_type); | |
8bb93aac N |
4509 | else |
4510 | return sprintf(page, "none\n"); | |
4511 | } | |
4512 | ||
4513 | static ssize_t | |
fd01b88c | 4514 | metadata_store(struct mddev *mddev, const char *buf, size_t len) |
8bb93aac N |
4515 | { |
4516 | int major, minor; | |
4517 | char *e; | |
6791875e | 4518 | int err; |
ea43ddd8 N |
4519 | /* Changing the details of 'external' metadata is |
4520 | * always permitted. Otherwise there must be | |
4521 | * no devices attached to the array. | |
4522 | */ | |
6791875e N |
4523 | |
4524 | err = mddev_lock(mddev); | |
4525 | if (err) | |
4526 | return err; | |
4527 | err = -EBUSY; | |
ea43ddd8 N |
4528 | if (mddev->external && strncmp(buf, "external:", 9) == 0) |
4529 | ; | |
4530 | else if (!list_empty(&mddev->disks)) | |
6791875e | 4531 | goto out_unlock; |
8bb93aac | 4532 | |
6791875e | 4533 | err = 0; |
8bb93aac N |
4534 | if (cmd_match(buf, "none")) { |
4535 | mddev->persistent = 0; | |
e691063a N |
4536 | mddev->external = 0; |
4537 | mddev->major_version = 0; | |
4538 | mddev->minor_version = 90; | |
6791875e | 4539 | goto out_unlock; |
e691063a N |
4540 | } |
4541 | if (strncmp(buf, "external:", 9) == 0) { | |
20a49ff6 | 4542 | size_t namelen = len-9; |
e691063a N |
4543 | if (namelen >= sizeof(mddev->metadata_type)) |
4544 | namelen = sizeof(mddev->metadata_type)-1; | |
4545 | strncpy(mddev->metadata_type, buf+9, namelen); | |
4546 | mddev->metadata_type[namelen] = 0; | |
4547 | if (namelen && mddev->metadata_type[namelen-1] == '\n') | |
4548 | mddev->metadata_type[--namelen] = 0; | |
4549 | mddev->persistent = 0; | |
4550 | mddev->external = 1; | |
8bb93aac N |
4551 | mddev->major_version = 0; |
4552 | mddev->minor_version = 90; | |
6791875e | 4553 | goto out_unlock; |
8bb93aac N |
4554 | } |
4555 | major = simple_strtoul(buf, &e, 10); | |
6791875e | 4556 | err = -EINVAL; |
8bb93aac | 4557 | if (e==buf || *e != '.') |
6791875e | 4558 | goto out_unlock; |
8bb93aac N |
4559 | buf = e+1; |
4560 | minor = simple_strtoul(buf, &e, 10); | |
3f9d7b0d | 4561 | if (e==buf || (*e && *e != '\n') ) |
6791875e N |
4562 | goto out_unlock; |
4563 | err = -ENOENT; | |
50511da3 | 4564 | if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL) |
6791875e | 4565 | goto out_unlock; |
8bb93aac N |
4566 | mddev->major_version = major; |
4567 | mddev->minor_version = minor; | |
4568 | mddev->persistent = 1; | |
e691063a | 4569 | mddev->external = 0; |
6791875e N |
4570 | err = 0; |
4571 | out_unlock: | |
4572 | mddev_unlock(mddev); | |
4573 | return err ?: len; | |
8bb93aac N |
4574 | } |
4575 | ||
4576 | static struct md_sysfs_entry md_metadata = | |
750f199e | 4577 | __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store); |
8bb93aac | 4578 | |
24dd469d | 4579 | static ssize_t |
fd01b88c | 4580 | action_show(struct mddev *mddev, char *page) |
24dd469d | 4581 | { |
7eec314d | 4582 | char *type = "idle"; |
b7b17c9b N |
4583 | unsigned long recovery = mddev->recovery; |
4584 | if (test_bit(MD_RECOVERY_FROZEN, &recovery)) | |
b6a9ce68 | 4585 | type = "frozen"; |
b7b17c9b N |
4586 | else if (test_bit(MD_RECOVERY_RUNNING, &recovery) || |
4587 | (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) { | |
4588 | if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) | |
ccfcc3c1 | 4589 | type = "reshape"; |
b7b17c9b N |
4590 | else if (test_bit(MD_RECOVERY_SYNC, &recovery)) { |
4591 | if (!test_bit(MD_RECOVERY_REQUESTED, &recovery)) | |
24dd469d | 4592 | type = "resync"; |
b7b17c9b | 4593 | else if (test_bit(MD_RECOVERY_CHECK, &recovery)) |
24dd469d N |
4594 | type = "check"; |
4595 | else | |
4596 | type = "repair"; | |
b7b17c9b | 4597 | } else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) |
24dd469d | 4598 | type = "recover"; |
985ca973 N |
4599 | else if (mddev->reshape_position != MaxSector) |
4600 | type = "reshape"; | |
24dd469d N |
4601 | } |
4602 | return sprintf(page, "%s\n", type); | |
4603 | } | |
4604 | ||
4605 | static ssize_t | |
fd01b88c | 4606 | action_store(struct mddev *mddev, const char *page, size_t len) |
24dd469d | 4607 | { |
7eec314d N |
4608 | if (!mddev->pers || !mddev->pers->sync_request) |
4609 | return -EINVAL; | |
4610 | ||
b6a9ce68 N |
4611 | |
4612 | if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { | |
56ccc112 N |
4613 | if (cmd_match(page, "frozen")) |
4614 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4615 | else | |
4616 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
8e8e2518 N |
4617 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
4618 | mddev_lock(mddev) == 0) { | |
4619 | flush_workqueue(md_misc_wq); | |
4620 | if (mddev->sync_thread) { | |
4621 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
6791875e | 4622 | md_reap_sync_thread(mddev); |
6791875e | 4623 | } |
8e8e2518 | 4624 | mddev_unlock(mddev); |
7eec314d | 4625 | } |
312045ee | 4626 | } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
24dd469d | 4627 | return -EBUSY; |
72a23c21 | 4628 | else if (cmd_match(page, "resync")) |
56ccc112 | 4629 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4630 | else if (cmd_match(page, "recover")) { |
56ccc112 | 4631 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
72a23c21 | 4632 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
72a23c21 | 4633 | } else if (cmd_match(page, "reshape")) { |
16484bf5 N |
4634 | int err; |
4635 | if (mddev->pers->start_reshape == NULL) | |
4636 | return -EINVAL; | |
6791875e N |
4637 | err = mddev_lock(mddev); |
4638 | if (!err) { | |
312045ee N |
4639 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4640 | err = -EBUSY; | |
4641 | else { | |
4642 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
4643 | err = mddev->pers->start_reshape(mddev); | |
4644 | } | |
6791875e N |
4645 | mddev_unlock(mddev); |
4646 | } | |
16484bf5 N |
4647 | if (err) |
4648 | return err; | |
a99ac971 | 4649 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
16484bf5 | 4650 | } else { |
bce74dac | 4651 | if (cmd_match(page, "check")) |
7eec314d | 4652 | set_bit(MD_RECOVERY_CHECK, &mddev->recovery); |
2adc7d47 | 4653 | else if (!cmd_match(page, "repair")) |
7eec314d | 4654 | return -EINVAL; |
56ccc112 | 4655 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
7eec314d N |
4656 | set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
4657 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
7eec314d | 4658 | } |
48c26ddc N |
4659 | if (mddev->ro == 2) { |
4660 | /* A write to sync_action is enough to justify | |
4661 | * canceling read-auto mode | |
4662 | */ | |
4663 | mddev->ro = 0; | |
4664 | md_wakeup_thread(mddev->sync_thread); | |
4665 | } | |
03c902e1 | 4666 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
24dd469d | 4667 | md_wakeup_thread(mddev->thread); |
00bcb4ac | 4668 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
24dd469d N |
4669 | return len; |
4670 | } | |
4671 | ||
c4a39551 | 4672 | static struct md_sysfs_entry md_scan_mode = |
750f199e | 4673 | __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); |
c4a39551 JB |
4674 | |
4675 | static ssize_t | |
4676 | last_sync_action_show(struct mddev *mddev, char *page) | |
4677 | { | |
4678 | return sprintf(page, "%s\n", mddev->last_sync_action); | |
4679 | } | |
4680 | ||
4681 | static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action); | |
4682 | ||
9d88883e | 4683 | static ssize_t |
fd01b88c | 4684 | mismatch_cnt_show(struct mddev *mddev, char *page) |
9d88883e N |
4685 | { |
4686 | return sprintf(page, "%llu\n", | |
7f7583d4 JM |
4687 | (unsigned long long) |
4688 | atomic64_read(&mddev->resync_mismatches)); | |
9d88883e N |
4689 | } |
4690 | ||
80ca3a44 | 4691 | static struct md_sysfs_entry md_mismatches = __ATTR_RO(mismatch_cnt); |
9d88883e | 4692 | |
88202a0c | 4693 | static ssize_t |
fd01b88c | 4694 | sync_min_show(struct mddev *mddev, char *page) |
88202a0c N |
4695 | { |
4696 | return sprintf(page, "%d (%s)\n", speed_min(mddev), | |
4697 | mddev->sync_speed_min ? "local": "system"); | |
4698 | } | |
4699 | ||
4700 | static ssize_t | |
fd01b88c | 4701 | sync_min_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4702 | { |
4c9309c0 AD |
4703 | unsigned int min; |
4704 | int rv; | |
4705 | ||
88202a0c | 4706 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4707 | min = 0; |
4708 | } else { | |
4709 | rv = kstrtouint(buf, 10, &min); | |
4710 | if (rv < 0) | |
4711 | return rv; | |
4712 | if (min == 0) | |
4713 | return -EINVAL; | |
88202a0c | 4714 | } |
88202a0c N |
4715 | mddev->sync_speed_min = min; |
4716 | return len; | |
4717 | } | |
4718 | ||
4719 | static struct md_sysfs_entry md_sync_min = | |
4720 | __ATTR(sync_speed_min, S_IRUGO|S_IWUSR, sync_min_show, sync_min_store); | |
4721 | ||
4722 | static ssize_t | |
fd01b88c | 4723 | sync_max_show(struct mddev *mddev, char *page) |
88202a0c N |
4724 | { |
4725 | return sprintf(page, "%d (%s)\n", speed_max(mddev), | |
4726 | mddev->sync_speed_max ? "local": "system"); | |
4727 | } | |
4728 | ||
4729 | static ssize_t | |
fd01b88c | 4730 | sync_max_store(struct mddev *mddev, const char *buf, size_t len) |
88202a0c | 4731 | { |
4c9309c0 AD |
4732 | unsigned int max; |
4733 | int rv; | |
4734 | ||
88202a0c | 4735 | if (strncmp(buf, "system", 6)==0) { |
4c9309c0 AD |
4736 | max = 0; |
4737 | } else { | |
4738 | rv = kstrtouint(buf, 10, &max); | |
4739 | if (rv < 0) | |
4740 | return rv; | |
4741 | if (max == 0) | |
4742 | return -EINVAL; | |
88202a0c | 4743 | } |
88202a0c N |
4744 | mddev->sync_speed_max = max; |
4745 | return len; | |
4746 | } | |
4747 | ||
4748 | static struct md_sysfs_entry md_sync_max = | |
4749 | __ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); | |
4750 | ||
d7f3d291 | 4751 | static ssize_t |
fd01b88c | 4752 | degraded_show(struct mddev *mddev, char *page) |
d7f3d291 IP |
4753 | { |
4754 | return sprintf(page, "%d\n", mddev->degraded); | |
4755 | } | |
4756 | static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded); | |
88202a0c | 4757 | |
90b08710 | 4758 | static ssize_t |
fd01b88c | 4759 | sync_force_parallel_show(struct mddev *mddev, char *page) |
90b08710 BS |
4760 | { |
4761 | return sprintf(page, "%d\n", mddev->parallel_resync); | |
4762 | } | |
4763 | ||
4764 | static ssize_t | |
fd01b88c | 4765 | sync_force_parallel_store(struct mddev *mddev, const char *buf, size_t len) |
90b08710 BS |
4766 | { |
4767 | long n; | |
4768 | ||
b29bebd6 | 4769 | if (kstrtol(buf, 10, &n)) |
90b08710 BS |
4770 | return -EINVAL; |
4771 | ||
4772 | if (n != 0 && n != 1) | |
4773 | return -EINVAL; | |
4774 | ||
4775 | mddev->parallel_resync = n; | |
4776 | ||
4777 | if (mddev->sync_thread) | |
4778 | wake_up(&resync_wait); | |
4779 | ||
4780 | return len; | |
4781 | } | |
4782 | ||
4783 | /* force parallel resync, even with shared block devices */ | |
4784 | static struct md_sysfs_entry md_sync_force_parallel = | |
4785 | __ATTR(sync_force_parallel, S_IRUGO|S_IWUSR, | |
4786 | sync_force_parallel_show, sync_force_parallel_store); | |
4787 | ||
88202a0c | 4788 | static ssize_t |
fd01b88c | 4789 | sync_speed_show(struct mddev *mddev, char *page) |
88202a0c N |
4790 | { |
4791 | unsigned long resync, dt, db; | |
d1a7c503 N |
4792 | if (mddev->curr_resync == 0) |
4793 | return sprintf(page, "none\n"); | |
9687a60c AN |
4794 | resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active); |
4795 | dt = (jiffies - mddev->resync_mark) / HZ; | |
88202a0c | 4796 | if (!dt) dt++; |
9687a60c AN |
4797 | db = resync - mddev->resync_mark_cnt; |
4798 | return sprintf(page, "%lu\n", db/dt/2); /* K/sec */ | |
88202a0c N |
4799 | } |
4800 | ||
80ca3a44 | 4801 | static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed); |
88202a0c N |
4802 | |
4803 | static ssize_t | |
fd01b88c | 4804 | sync_completed_show(struct mddev *mddev, char *page) |
88202a0c | 4805 | { |
13ae864b | 4806 | unsigned long long max_sectors, resync; |
88202a0c | 4807 | |
acb180b0 N |
4808 | if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
4809 | return sprintf(page, "none\n"); | |
4810 | ||
72f36d59 N |
4811 | if (mddev->curr_resync == 1 || |
4812 | mddev->curr_resync == 2) | |
4813 | return sprintf(page, "delayed\n"); | |
4814 | ||
c804cdec N |
4815 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
4816 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
58c0fed4 | 4817 | max_sectors = mddev->resync_max_sectors; |
88202a0c | 4818 | else |
58c0fed4 | 4819 | max_sectors = mddev->dev_sectors; |
88202a0c | 4820 | |
acb180b0 | 4821 | resync = mddev->curr_resync_completed; |
13ae864b | 4822 | return sprintf(page, "%llu / %llu\n", resync, max_sectors); |
88202a0c N |
4823 | } |
4824 | ||
750f199e N |
4825 | static struct md_sysfs_entry md_sync_completed = |
4826 | __ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL); | |
88202a0c | 4827 | |
5e96ee65 | 4828 | static ssize_t |
fd01b88c | 4829 | min_sync_show(struct mddev *mddev, char *page) |
5e96ee65 NB |
4830 | { |
4831 | return sprintf(page, "%llu\n", | |
4832 | (unsigned long long)mddev->resync_min); | |
4833 | } | |
4834 | static ssize_t | |
fd01b88c | 4835 | min_sync_store(struct mddev *mddev, const char *buf, size_t len) |
5e96ee65 NB |
4836 | { |
4837 | unsigned long long min; | |
23da422b | 4838 | int err; |
23da422b | 4839 | |
b29bebd6 | 4840 | if (kstrtoull(buf, 10, &min)) |
5e96ee65 | 4841 | return -EINVAL; |
23da422b N |
4842 | |
4843 | spin_lock(&mddev->lock); | |
4844 | err = -EINVAL; | |
5e96ee65 | 4845 | if (min > mddev->resync_max) |
23da422b N |
4846 | goto out_unlock; |
4847 | ||
4848 | err = -EBUSY; | |
5e96ee65 | 4849 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4850 | goto out_unlock; |
5e96ee65 | 4851 | |
50c37b13 N |
4852 | /* Round down to multiple of 4K for safety */ |
4853 | mddev->resync_min = round_down(min, 8); | |
23da422b | 4854 | err = 0; |
5e96ee65 | 4855 | |
23da422b N |
4856 | out_unlock: |
4857 | spin_unlock(&mddev->lock); | |
4858 | return err ?: len; | |
5e96ee65 NB |
4859 | } |
4860 | ||
4861 | static struct md_sysfs_entry md_min_sync = | |
4862 | __ATTR(sync_min, S_IRUGO|S_IWUSR, min_sync_show, min_sync_store); | |
4863 | ||
c6207277 | 4864 | static ssize_t |
fd01b88c | 4865 | max_sync_show(struct mddev *mddev, char *page) |
c6207277 N |
4866 | { |
4867 | if (mddev->resync_max == MaxSector) | |
4868 | return sprintf(page, "max\n"); | |
4869 | else | |
4870 | return sprintf(page, "%llu\n", | |
4871 | (unsigned long long)mddev->resync_max); | |
4872 | } | |
4873 | static ssize_t | |
fd01b88c | 4874 | max_sync_store(struct mddev *mddev, const char *buf, size_t len) |
c6207277 | 4875 | { |
23da422b N |
4876 | int err; |
4877 | spin_lock(&mddev->lock); | |
c6207277 N |
4878 | if (strncmp(buf, "max", 3) == 0) |
4879 | mddev->resync_max = MaxSector; | |
4880 | else { | |
5e96ee65 | 4881 | unsigned long long max; |
23da422b N |
4882 | int chunk; |
4883 | ||
4884 | err = -EINVAL; | |
b29bebd6 | 4885 | if (kstrtoull(buf, 10, &max)) |
23da422b | 4886 | goto out_unlock; |
5e96ee65 | 4887 | if (max < mddev->resync_min) |
23da422b N |
4888 | goto out_unlock; |
4889 | ||
4890 | err = -EBUSY; | |
c6207277 | 4891 | if (max < mddev->resync_max && |
4d484a4a | 4892 | mddev->ro == 0 && |
c6207277 | 4893 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
23da422b | 4894 | goto out_unlock; |
c6207277 N |
4895 | |
4896 | /* Must be a multiple of chunk_size */ | |
23da422b N |
4897 | chunk = mddev->chunk_sectors; |
4898 | if (chunk) { | |
2ac06c33 | 4899 | sector_t temp = max; |
23da422b N |
4900 | |
4901 | err = -EINVAL; | |
4902 | if (sector_div(temp, chunk)) | |
4903 | goto out_unlock; | |
c6207277 N |
4904 | } |
4905 | mddev->resync_max = max; | |
4906 | } | |
4907 | wake_up(&mddev->recovery_wait); | |
23da422b N |
4908 | err = 0; |
4909 | out_unlock: | |
4910 | spin_unlock(&mddev->lock); | |
4911 | return err ?: len; | |
c6207277 N |
4912 | } |
4913 | ||
4914 | static struct md_sysfs_entry md_max_sync = | |
4915 | __ATTR(sync_max, S_IRUGO|S_IWUSR, max_sync_show, max_sync_store); | |
4916 | ||
e464eafd | 4917 | static ssize_t |
fd01b88c | 4918 | suspend_lo_show(struct mddev *mddev, char *page) |
e464eafd N |
4919 | { |
4920 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_lo); | |
4921 | } | |
4922 | ||
4923 | static ssize_t | |
fd01b88c | 4924 | suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4925 | { |
b03e0ccb | 4926 | unsigned long long new; |
6791875e | 4927 | int err; |
e464eafd | 4928 | |
4c9309c0 AD |
4929 | err = kstrtoull(buf, 10, &new); |
4930 | if (err < 0) | |
4931 | return err; | |
4932 | if (new != (sector_t)new) | |
e464eafd | 4933 | return -EINVAL; |
23ddff37 | 4934 | |
6791875e N |
4935 | err = mddev_lock(mddev); |
4936 | if (err) | |
4937 | return err; | |
4938 | err = -EINVAL; | |
4939 | if (mddev->pers == NULL || | |
4940 | mddev->pers->quiesce == NULL) | |
4941 | goto unlock; | |
b03e0ccb | 4942 | mddev_suspend(mddev); |
23ddff37 | 4943 | mddev->suspend_lo = new; |
b03e0ccb N |
4944 | mddev_resume(mddev); |
4945 | ||
6791875e N |
4946 | err = 0; |
4947 | unlock: | |
4948 | mddev_unlock(mddev); | |
4949 | return err ?: len; | |
e464eafd N |
4950 | } |
4951 | static struct md_sysfs_entry md_suspend_lo = | |
4952 | __ATTR(suspend_lo, S_IRUGO|S_IWUSR, suspend_lo_show, suspend_lo_store); | |
4953 | ||
e464eafd | 4954 | static ssize_t |
fd01b88c | 4955 | suspend_hi_show(struct mddev *mddev, char *page) |
e464eafd N |
4956 | { |
4957 | return sprintf(page, "%llu\n", (unsigned long long)mddev->suspend_hi); | |
4958 | } | |
4959 | ||
4960 | static ssize_t | |
fd01b88c | 4961 | suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) |
e464eafd | 4962 | { |
b03e0ccb | 4963 | unsigned long long new; |
6791875e | 4964 | int err; |
e464eafd | 4965 | |
4c9309c0 AD |
4966 | err = kstrtoull(buf, 10, &new); |
4967 | if (err < 0) | |
4968 | return err; | |
4969 | if (new != (sector_t)new) | |
e464eafd | 4970 | return -EINVAL; |
23ddff37 | 4971 | |
6791875e N |
4972 | err = mddev_lock(mddev); |
4973 | if (err) | |
4974 | return err; | |
4975 | err = -EINVAL; | |
b03e0ccb | 4976 | if (mddev->pers == NULL) |
6791875e | 4977 | goto unlock; |
b03e0ccb N |
4978 | |
4979 | mddev_suspend(mddev); | |
23ddff37 | 4980 | mddev->suspend_hi = new; |
b03e0ccb N |
4981 | mddev_resume(mddev); |
4982 | ||
6791875e N |
4983 | err = 0; |
4984 | unlock: | |
4985 | mddev_unlock(mddev); | |
4986 | return err ?: len; | |
e464eafd N |
4987 | } |
4988 | static struct md_sysfs_entry md_suspend_hi = | |
4989 | __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store); | |
4990 | ||
08a02ecd | 4991 | static ssize_t |
fd01b88c | 4992 | reshape_position_show(struct mddev *mddev, char *page) |
08a02ecd N |
4993 | { |
4994 | if (mddev->reshape_position != MaxSector) | |
4995 | return sprintf(page, "%llu\n", | |
4996 | (unsigned long long)mddev->reshape_position); | |
4997 | strcpy(page, "none\n"); | |
4998 | return 5; | |
4999 | } | |
5000 | ||
5001 | static ssize_t | |
fd01b88c | 5002 | reshape_position_store(struct mddev *mddev, const char *buf, size_t len) |
08a02ecd | 5003 | { |
c6563a8c | 5004 | struct md_rdev *rdev; |
4c9309c0 | 5005 | unsigned long long new; |
6791875e | 5006 | int err; |
6791875e | 5007 | |
4c9309c0 AD |
5008 | err = kstrtoull(buf, 10, &new); |
5009 | if (err < 0) | |
5010 | return err; | |
5011 | if (new != (sector_t)new) | |
08a02ecd | 5012 | return -EINVAL; |
6791875e N |
5013 | err = mddev_lock(mddev); |
5014 | if (err) | |
5015 | return err; | |
5016 | err = -EBUSY; | |
5017 | if (mddev->pers) | |
5018 | goto unlock; | |
08a02ecd N |
5019 | mddev->reshape_position = new; |
5020 | mddev->delta_disks = 0; | |
2c810cdd | 5021 | mddev->reshape_backwards = 0; |
08a02ecd N |
5022 | mddev->new_level = mddev->level; |
5023 | mddev->new_layout = mddev->layout; | |
664e7c41 | 5024 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
c6563a8c N |
5025 | rdev_for_each(rdev, mddev) |
5026 | rdev->new_data_offset = rdev->data_offset; | |
6791875e N |
5027 | err = 0; |
5028 | unlock: | |
5029 | mddev_unlock(mddev); | |
5030 | return err ?: len; | |
08a02ecd N |
5031 | } |
5032 | ||
5033 | static struct md_sysfs_entry md_reshape_position = | |
5034 | __ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show, | |
5035 | reshape_position_store); | |
5036 | ||
2c810cdd N |
5037 | static ssize_t |
5038 | reshape_direction_show(struct mddev *mddev, char *page) | |
5039 | { | |
5040 | return sprintf(page, "%s\n", | |
5041 | mddev->reshape_backwards ? "backwards" : "forwards"); | |
5042 | } | |
5043 | ||
5044 | static ssize_t | |
5045 | reshape_direction_store(struct mddev *mddev, const char *buf, size_t len) | |
5046 | { | |
5047 | int backwards = 0; | |
6791875e N |
5048 | int err; |
5049 | ||
2c810cdd N |
5050 | if (cmd_match(buf, "forwards")) |
5051 | backwards = 0; | |
5052 | else if (cmd_match(buf, "backwards")) | |
5053 | backwards = 1; | |
5054 | else | |
5055 | return -EINVAL; | |
5056 | if (mddev->reshape_backwards == backwards) | |
5057 | return len; | |
5058 | ||
6791875e N |
5059 | err = mddev_lock(mddev); |
5060 | if (err) | |
5061 | return err; | |
2c810cdd N |
5062 | /* check if we are allowed to change */ |
5063 | if (mddev->delta_disks) | |
6791875e N |
5064 | err = -EBUSY; |
5065 | else if (mddev->persistent && | |
2c810cdd | 5066 | mddev->major_version == 0) |
6791875e N |
5067 | err = -EINVAL; |
5068 | else | |
5069 | mddev->reshape_backwards = backwards; | |
5070 | mddev_unlock(mddev); | |
5071 | return err ?: len; | |
2c810cdd N |
5072 | } |
5073 | ||
5074 | static struct md_sysfs_entry md_reshape_direction = | |
5075 | __ATTR(reshape_direction, S_IRUGO|S_IWUSR, reshape_direction_show, | |
5076 | reshape_direction_store); | |
5077 | ||
b522adcd | 5078 | static ssize_t |
fd01b88c | 5079 | array_size_show(struct mddev *mddev, char *page) |
b522adcd DW |
5080 | { |
5081 | if (mddev->external_size) | |
5082 | return sprintf(page, "%llu\n", | |
5083 | (unsigned long long)mddev->array_sectors/2); | |
5084 | else | |
5085 | return sprintf(page, "default\n"); | |
5086 | } | |
5087 | ||
5088 | static ssize_t | |
fd01b88c | 5089 | array_size_store(struct mddev *mddev, const char *buf, size_t len) |
b522adcd DW |
5090 | { |
5091 | sector_t sectors; | |
6791875e N |
5092 | int err; |
5093 | ||
5094 | err = mddev_lock(mddev); | |
5095 | if (err) | |
5096 | return err; | |
b522adcd | 5097 | |
ab5a98b1 | 5098 | /* cluster raid doesn't support change array_sectors */ |
b670883b ZL |
5099 | if (mddev_is_clustered(mddev)) { |
5100 | mddev_unlock(mddev); | |
ab5a98b1 | 5101 | return -EINVAL; |
b670883b | 5102 | } |
ab5a98b1 | 5103 | |
b522adcd DW |
5104 | if (strncmp(buf, "default", 7) == 0) { |
5105 | if (mddev->pers) | |
5106 | sectors = mddev->pers->size(mddev, 0, 0); | |
5107 | else | |
5108 | sectors = mddev->array_sectors; | |
5109 | ||
5110 | mddev->external_size = 0; | |
5111 | } else { | |
5112 | if (strict_blocks_to_sectors(buf, §ors) < 0) | |
6791875e N |
5113 | err = -EINVAL; |
5114 | else if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors) | |
5115 | err = -E2BIG; | |
5116 | else | |
5117 | mddev->external_size = 1; | |
b522adcd DW |
5118 | } |
5119 | ||
6791875e N |
5120 | if (!err) { |
5121 | mddev->array_sectors = sectors; | |
5122 | if (mddev->pers) { | |
5123 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
5124 | revalidate_disk(mddev->gendisk); | |
5125 | } | |
cbe6ef1d | 5126 | } |
6791875e N |
5127 | mddev_unlock(mddev); |
5128 | return err ?: len; | |
b522adcd DW |
5129 | } |
5130 | ||
5131 | static struct md_sysfs_entry md_array_size = | |
5132 | __ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show, | |
5133 | array_size_store); | |
e464eafd | 5134 | |
664aed04 AP |
5135 | static ssize_t |
5136 | consistency_policy_show(struct mddev *mddev, char *page) | |
5137 | { | |
5138 | int ret; | |
5139 | ||
5140 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { | |
5141 | ret = sprintf(page, "journal\n"); | |
5142 | } else if (test_bit(MD_HAS_PPL, &mddev->flags)) { | |
5143 | ret = sprintf(page, "ppl\n"); | |
5144 | } else if (mddev->bitmap) { | |
5145 | ret = sprintf(page, "bitmap\n"); | |
5146 | } else if (mddev->pers) { | |
5147 | if (mddev->pers->sync_request) | |
5148 | ret = sprintf(page, "resync\n"); | |
5149 | else | |
5150 | ret = sprintf(page, "none\n"); | |
5151 | } else { | |
5152 | ret = sprintf(page, "unknown\n"); | |
5153 | } | |
5154 | ||
5155 | return ret; | |
5156 | } | |
5157 | ||
5158 | static ssize_t | |
5159 | consistency_policy_store(struct mddev *mddev, const char *buf, size_t len) | |
5160 | { | |
ba903a3e AP |
5161 | int err = 0; |
5162 | ||
664aed04 | 5163 | if (mddev->pers) { |
ba903a3e AP |
5164 | if (mddev->pers->change_consistency_policy) |
5165 | err = mddev->pers->change_consistency_policy(mddev, buf); | |
5166 | else | |
5167 | err = -EBUSY; | |
664aed04 AP |
5168 | } else if (mddev->external && strncmp(buf, "ppl", 3) == 0) { |
5169 | set_bit(MD_HAS_PPL, &mddev->flags); | |
664aed04 | 5170 | } else { |
ba903a3e | 5171 | err = -EINVAL; |
664aed04 | 5172 | } |
ba903a3e AP |
5173 | |
5174 | return err ? err : len; | |
664aed04 AP |
5175 | } |
5176 | ||
5177 | static struct md_sysfs_entry md_consistency_policy = | |
5178 | __ATTR(consistency_policy, S_IRUGO | S_IWUSR, consistency_policy_show, | |
5179 | consistency_policy_store); | |
5180 | ||
9a567843 GJ |
5181 | static ssize_t fail_last_dev_show(struct mddev *mddev, char *page) |
5182 | { | |
5183 | return sprintf(page, "%d\n", mddev->fail_last_dev); | |
5184 | } | |
5185 | ||
5186 | /* | |
5187 | * Setting fail_last_dev to true to allow last device to be forcibly removed | |
5188 | * from RAID1/RAID10. | |
5189 | */ | |
5190 | static ssize_t | |
5191 | fail_last_dev_store(struct mddev *mddev, const char *buf, size_t len) | |
5192 | { | |
5193 | int ret; | |
5194 | bool value; | |
5195 | ||
5196 | ret = kstrtobool(buf, &value); | |
5197 | if (ret) | |
5198 | return ret; | |
5199 | ||
5200 | if (value != mddev->fail_last_dev) | |
5201 | mddev->fail_last_dev = value; | |
5202 | ||
5203 | return len; | |
5204 | } | |
5205 | static struct md_sysfs_entry md_fail_last_dev = | |
5206 | __ATTR(fail_last_dev, S_IRUGO | S_IWUSR, fail_last_dev_show, | |
5207 | fail_last_dev_store); | |
5208 | ||
eae1701f N |
5209 | static struct attribute *md_default_attrs[] = { |
5210 | &md_level.attr, | |
d4dbd025 | 5211 | &md_layout.attr, |
eae1701f | 5212 | &md_raid_disks.attr, |
3b34380a | 5213 | &md_chunk_size.attr, |
a35b0d69 | 5214 | &md_size.attr, |
a94213b1 | 5215 | &md_resync_start.attr, |
8bb93aac | 5216 | &md_metadata.attr, |
6d7ff738 | 5217 | &md_new_device.attr, |
16f17b39 | 5218 | &md_safe_delay.attr, |
9e653b63 | 5219 | &md_array_state.attr, |
08a02ecd | 5220 | &md_reshape_position.attr, |
2c810cdd | 5221 | &md_reshape_direction.attr, |
b522adcd | 5222 | &md_array_size.attr, |
1e50915f | 5223 | &max_corr_read_errors.attr, |
664aed04 | 5224 | &md_consistency_policy.attr, |
9a567843 | 5225 | &md_fail_last_dev.attr, |
411036fa N |
5226 | NULL, |
5227 | }; | |
5228 | ||
5229 | static struct attribute *md_redundancy_attrs[] = { | |
24dd469d | 5230 | &md_scan_mode.attr, |
c4a39551 | 5231 | &md_last_scan_mode.attr, |
9d88883e | 5232 | &md_mismatches.attr, |
88202a0c N |
5233 | &md_sync_min.attr, |
5234 | &md_sync_max.attr, | |
5235 | &md_sync_speed.attr, | |
90b08710 | 5236 | &md_sync_force_parallel.attr, |
88202a0c | 5237 | &md_sync_completed.attr, |
5e96ee65 | 5238 | &md_min_sync.attr, |
c6207277 | 5239 | &md_max_sync.attr, |
e464eafd N |
5240 | &md_suspend_lo.attr, |
5241 | &md_suspend_hi.attr, | |
9b1d1dac | 5242 | &md_bitmap.attr, |
d7f3d291 | 5243 | &md_degraded.attr, |
eae1701f N |
5244 | NULL, |
5245 | }; | |
411036fa N |
5246 | static struct attribute_group md_redundancy_group = { |
5247 | .name = NULL, | |
5248 | .attrs = md_redundancy_attrs, | |
5249 | }; | |
5250 | ||
eae1701f N |
5251 | static ssize_t |
5252 | md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) | |
5253 | { | |
5254 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5255 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5256 | ssize_t rv; |
eae1701f N |
5257 | |
5258 | if (!entry->show) | |
5259 | return -EIO; | |
af8a2434 N |
5260 | spin_lock(&all_mddevs_lock); |
5261 | if (list_empty(&mddev->all_mddevs)) { | |
5262 | spin_unlock(&all_mddevs_lock); | |
5263 | return -EBUSY; | |
5264 | } | |
5265 | mddev_get(mddev); | |
5266 | spin_unlock(&all_mddevs_lock); | |
5267 | ||
b7b17c9b | 5268 | rv = entry->show(mddev, page); |
af8a2434 | 5269 | mddev_put(mddev); |
96de1e66 | 5270 | return rv; |
eae1701f N |
5271 | } |
5272 | ||
5273 | static ssize_t | |
5274 | md_attr_store(struct kobject *kobj, struct attribute *attr, | |
5275 | const char *page, size_t length) | |
5276 | { | |
5277 | struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); | |
fd01b88c | 5278 | struct mddev *mddev = container_of(kobj, struct mddev, kobj); |
96de1e66 | 5279 | ssize_t rv; |
eae1701f N |
5280 | |
5281 | if (!entry->store) | |
5282 | return -EIO; | |
67463acb N |
5283 | if (!capable(CAP_SYS_ADMIN)) |
5284 | return -EACCES; | |
af8a2434 N |
5285 | spin_lock(&all_mddevs_lock); |
5286 | if (list_empty(&mddev->all_mddevs)) { | |
5287 | spin_unlock(&all_mddevs_lock); | |
5288 | return -EBUSY; | |
5289 | } | |
5290 | mddev_get(mddev); | |
5291 | spin_unlock(&all_mddevs_lock); | |
6791875e | 5292 | rv = entry->store(mddev, page, length); |
af8a2434 | 5293 | mddev_put(mddev); |
96de1e66 | 5294 | return rv; |
eae1701f N |
5295 | } |
5296 | ||
5297 | static void md_free(struct kobject *ko) | |
5298 | { | |
fd01b88c | 5299 | struct mddev *mddev = container_of(ko, struct mddev, kobj); |
a21d1504 N |
5300 | |
5301 | if (mddev->sysfs_state) | |
5302 | sysfs_put(mddev->sysfs_state); | |
5303 | ||
d8115c35 BVA |
5304 | if (mddev->gendisk) |
5305 | del_gendisk(mddev->gendisk); | |
6cd18e71 N |
5306 | if (mddev->queue) |
5307 | blk_cleanup_queue(mddev->queue); | |
d8115c35 | 5308 | if (mddev->gendisk) |
a21d1504 | 5309 | put_disk(mddev->gendisk); |
4ad23a97 | 5310 | percpu_ref_exit(&mddev->writes_pending); |
a21d1504 | 5311 | |
28dec870 KO |
5312 | bioset_exit(&mddev->bio_set); |
5313 | bioset_exit(&mddev->sync_set); | |
eae1701f N |
5314 | kfree(mddev); |
5315 | } | |
5316 | ||
52cf25d0 | 5317 | static const struct sysfs_ops md_sysfs_ops = { |
eae1701f N |
5318 | .show = md_attr_show, |
5319 | .store = md_attr_store, | |
5320 | }; | |
5321 | static struct kobj_type md_ktype = { | |
5322 | .release = md_free, | |
5323 | .sysfs_ops = &md_sysfs_ops, | |
5324 | .default_attrs = md_default_attrs, | |
5325 | }; | |
5326 | ||
1da177e4 LT |
5327 | int mdp_major = 0; |
5328 | ||
5fd3a17e DW |
5329 | static void mddev_delayed_delete(struct work_struct *ws) |
5330 | { | |
fd01b88c | 5331 | struct mddev *mddev = container_of(ws, struct mddev, del_work); |
5fd3a17e | 5332 | |
43a70507 | 5333 | sysfs_remove_group(&mddev->kobj, &md_bitmap_group); |
5fd3a17e DW |
5334 | kobject_del(&mddev->kobj); |
5335 | kobject_put(&mddev->kobj); | |
5336 | } | |
5337 | ||
4ad23a97 N |
5338 | static void no_op(struct percpu_ref *r) {} |
5339 | ||
a415c0f1 N |
5340 | int mddev_init_writes_pending(struct mddev *mddev) |
5341 | { | |
5342 | if (mddev->writes_pending.percpu_count_ptr) | |
5343 | return 0; | |
ddde2af7 RG |
5344 | if (percpu_ref_init(&mddev->writes_pending, no_op, |
5345 | PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) | |
a415c0f1 N |
5346 | return -ENOMEM; |
5347 | /* We want to start with the refcount at zero */ | |
5348 | percpu_ref_put(&mddev->writes_pending); | |
5349 | return 0; | |
5350 | } | |
5351 | EXPORT_SYMBOL_GPL(mddev_init_writes_pending); | |
5352 | ||
efeb53c0 | 5353 | static int md_alloc(dev_t dev, char *name) |
1da177e4 | 5354 | { |
039b7225 N |
5355 | /* |
5356 | * If dev is zero, name is the name of a device to allocate with | |
5357 | * an arbitrary minor number. It will be "md_???" | |
5358 | * If dev is non-zero it must be a device number with a MAJOR of | |
5359 | * MD_MAJOR or mdp_major. In this case, if "name" is NULL, then | |
5360 | * the device is being created by opening a node in /dev. | |
5361 | * If "name" is not NULL, the device is being created by | |
5362 | * writing to /sys/module/md_mod/parameters/new_array. | |
5363 | */ | |
48c9c27b | 5364 | static DEFINE_MUTEX(disks_mutex); |
fd01b88c | 5365 | struct mddev *mddev = mddev_find(dev); |
1da177e4 | 5366 | struct gendisk *disk; |
efeb53c0 N |
5367 | int partitioned; |
5368 | int shift; | |
5369 | int unit; | |
3830c62f | 5370 | int error; |
1da177e4 LT |
5371 | |
5372 | if (!mddev) | |
efeb53c0 N |
5373 | return -ENODEV; |
5374 | ||
5375 | partitioned = (MAJOR(mddev->unit) != MD_MAJOR); | |
5376 | shift = partitioned ? MdpMinorShift : 0; | |
5377 | unit = MINOR(mddev->unit) >> shift; | |
1da177e4 | 5378 | |
e804ac78 TH |
5379 | /* wait for any previous instance of this device to be |
5380 | * completely removed (mddev_delayed_delete). | |
d3374825 | 5381 | */ |
e804ac78 | 5382 | flush_workqueue(md_misc_wq); |
d3374825 | 5383 | |
48c9c27b | 5384 | mutex_lock(&disks_mutex); |
0909dc44 N |
5385 | error = -EEXIST; |
5386 | if (mddev->gendisk) | |
5387 | goto abort; | |
efeb53c0 | 5388 | |
039b7225 | 5389 | if (name && !dev) { |
efeb53c0 N |
5390 | /* Need to ensure that 'name' is not a duplicate. |
5391 | */ | |
fd01b88c | 5392 | struct mddev *mddev2; |
efeb53c0 N |
5393 | spin_lock(&all_mddevs_lock); |
5394 | ||
5395 | list_for_each_entry(mddev2, &all_mddevs, all_mddevs) | |
5396 | if (mddev2->gendisk && | |
5397 | strcmp(mddev2->gendisk->disk_name, name) == 0) { | |
5398 | spin_unlock(&all_mddevs_lock); | |
0909dc44 | 5399 | goto abort; |
efeb53c0 N |
5400 | } |
5401 | spin_unlock(&all_mddevs_lock); | |
1da177e4 | 5402 | } |
039b7225 N |
5403 | if (name && dev) |
5404 | /* | |
5405 | * Creating /dev/mdNNN via "newarray", so adjust hold_active. | |
5406 | */ | |
5407 | mddev->hold_active = UNTIL_STOP; | |
8b765398 | 5408 | |
0909dc44 | 5409 | error = -ENOMEM; |
8b765398 | 5410 | mddev->queue = blk_alloc_queue(GFP_KERNEL); |
0909dc44 N |
5411 | if (!mddev->queue) |
5412 | goto abort; | |
409c57f3 N |
5413 | mddev->queue->queuedata = mddev; |
5414 | ||
409c57f3 | 5415 | blk_queue_make_request(mddev->queue, md_make_request); |
b1bd055d | 5416 | blk_set_stacking_limits(&mddev->queue->limits); |
8b765398 | 5417 | |
1da177e4 LT |
5418 | disk = alloc_disk(1 << shift); |
5419 | if (!disk) { | |
8b765398 N |
5420 | blk_cleanup_queue(mddev->queue); |
5421 | mddev->queue = NULL; | |
0909dc44 | 5422 | goto abort; |
1da177e4 | 5423 | } |
efeb53c0 | 5424 | disk->major = MAJOR(mddev->unit); |
1da177e4 | 5425 | disk->first_minor = unit << shift; |
efeb53c0 N |
5426 | if (name) |
5427 | strcpy(disk->disk_name, name); | |
5428 | else if (partitioned) | |
1da177e4 | 5429 | sprintf(disk->disk_name, "md_d%d", unit); |
ce7b0f46 | 5430 | else |
1da177e4 | 5431 | sprintf(disk->disk_name, "md%d", unit); |
1da177e4 LT |
5432 | disk->fops = &md_fops; |
5433 | disk->private_data = mddev; | |
5434 | disk->queue = mddev->queue; | |
56883a7e | 5435 | blk_queue_write_cache(mddev->queue, true, true); |
92850bbd | 5436 | /* Allow extended partitions. This makes the |
d3374825 | 5437 | * 'mdp' device redundant, but we can't really |
92850bbd N |
5438 | * remove it now. |
5439 | */ | |
5440 | disk->flags |= GENHD_FL_EXT_DEVT; | |
1da177e4 | 5441 | mddev->gendisk = disk; |
b0140891 N |
5442 | /* As soon as we call add_disk(), another thread could get |
5443 | * through to md_open, so make sure it doesn't get too far | |
5444 | */ | |
5445 | mutex_lock(&mddev->open_mutex); | |
5446 | add_disk(disk); | |
5447 | ||
28dec870 | 5448 | error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); |
0909dc44 N |
5449 | if (error) { |
5450 | /* This isn't possible, but as kobject_init_and_add is marked | |
5451 | * __must_check, we must do something with the result | |
5452 | */ | |
9d48739e N |
5453 | pr_debug("md: cannot register %s/md - name in use\n", |
5454 | disk->disk_name); | |
0909dc44 N |
5455 | error = 0; |
5456 | } | |
00bcb4ac N |
5457 | if (mddev->kobj.sd && |
5458 | sysfs_create_group(&mddev->kobj, &md_bitmap_group)) | |
9d48739e | 5459 | pr_debug("pointless warning\n"); |
b0140891 | 5460 | mutex_unlock(&mddev->open_mutex); |
0909dc44 N |
5461 | abort: |
5462 | mutex_unlock(&disks_mutex); | |
00bcb4ac | 5463 | if (!error && mddev->kobj.sd) { |
3830c62f | 5464 | kobject_uevent(&mddev->kobj, KOBJ_ADD); |
00bcb4ac | 5465 | mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); |
b62b7590 | 5466 | } |
d3374825 | 5467 | mddev_put(mddev); |
0909dc44 | 5468 | return error; |
efeb53c0 N |
5469 | } |
5470 | ||
5471 | static struct kobject *md_probe(dev_t dev, int *part, void *data) | |
5472 | { | |
78b6350d N |
5473 | if (create_on_open) |
5474 | md_alloc(dev, NULL); | |
1da177e4 LT |
5475 | return NULL; |
5476 | } | |
5477 | ||
e4dca7b7 | 5478 | static int add_named_array(const char *val, const struct kernel_param *kp) |
efeb53c0 | 5479 | { |
039b7225 N |
5480 | /* |
5481 | * val must be "md_*" or "mdNNN". | |
5482 | * For "md_*" we allocate an array with a large free minor number, and | |
efeb53c0 | 5483 | * set the name to val. val must not already be an active name. |
039b7225 N |
5484 | * For "mdNNN" we allocate an array with the minor number NNN |
5485 | * which must not already be in use. | |
efeb53c0 N |
5486 | */ |
5487 | int len = strlen(val); | |
5488 | char buf[DISK_NAME_LEN]; | |
039b7225 | 5489 | unsigned long devnum; |
efeb53c0 N |
5490 | |
5491 | while (len && val[len-1] == '\n') | |
5492 | len--; | |
5493 | if (len >= DISK_NAME_LEN) | |
5494 | return -E2BIG; | |
5495 | strlcpy(buf, val, len+1); | |
039b7225 N |
5496 | if (strncmp(buf, "md_", 3) == 0) |
5497 | return md_alloc(0, buf); | |
5498 | if (strncmp(buf, "md", 2) == 0 && | |
5499 | isdigit(buf[2]) && | |
5500 | kstrtoul(buf+2, 10, &devnum) == 0 && | |
5501 | devnum <= MINORMASK) | |
5502 | return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); | |
5503 | ||
5504 | return -EINVAL; | |
efeb53c0 N |
5505 | } |
5506 | ||
8376d3c1 | 5507 | static void md_safemode_timeout(struct timer_list *t) |
1da177e4 | 5508 | { |
8376d3c1 | 5509 | struct mddev *mddev = from_timer(mddev, t, safemode_timer); |
1da177e4 | 5510 | |
4ad23a97 N |
5511 | mddev->safemode = 1; |
5512 | if (mddev->external) | |
5513 | sysfs_notify_dirent_safe(mddev->sysfs_state); | |
5514 | ||
1da177e4 LT |
5515 | md_wakeup_thread(mddev->thread); |
5516 | } | |
5517 | ||
6ff8d8ec | 5518 | static int start_dirty_degraded; |
1da177e4 | 5519 | |
fd01b88c | 5520 | int md_run(struct mddev *mddev) |
1da177e4 | 5521 | { |
2604b703 | 5522 | int err; |
3cb03002 | 5523 | struct md_rdev *rdev; |
84fc4b56 | 5524 | struct md_personality *pers; |
1da177e4 | 5525 | |
a757e64c N |
5526 | if (list_empty(&mddev->disks)) |
5527 | /* cannot run an array with no devices.. */ | |
1da177e4 | 5528 | return -EINVAL; |
1da177e4 LT |
5529 | |
5530 | if (mddev->pers) | |
5531 | return -EBUSY; | |
bb4f1e9d N |
5532 | /* Cannot run until previous stop completes properly */ |
5533 | if (mddev->sysfs_active) | |
5534 | return -EBUSY; | |
b6eb127d | 5535 | |
1da177e4 LT |
5536 | /* |
5537 | * Analyze all RAID superblock(s) | |
5538 | */ | |
1ec4a939 N |
5539 | if (!mddev->raid_disks) { |
5540 | if (!mddev->persistent) | |
5541 | return -EINVAL; | |
a757e64c | 5542 | analyze_sbs(mddev); |
1ec4a939 | 5543 | } |
1da177e4 | 5544 | |
d9d166c2 N |
5545 | if (mddev->level != LEVEL_NONE) |
5546 | request_module("md-level-%d", mddev->level); | |
5547 | else if (mddev->clevel[0]) | |
5548 | request_module("md-%s", mddev->clevel); | |
1da177e4 LT |
5549 | |
5550 | /* | |
5551 | * Drop all container device buffers, from now on | |
5552 | * the only valid external interface is through the md | |
5553 | * device. | |
1da177e4 | 5554 | */ |
4b6c1060 | 5555 | mddev->has_superblocks = false; |
dafb20fa | 5556 | rdev_for_each(rdev, mddev) { |
b2d444d7 | 5557 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
5558 | continue; |
5559 | sync_blockdev(rdev->bdev); | |
f98393a6 | 5560 | invalidate_bdev(rdev->bdev); |
97b20ef7 N |
5561 | if (mddev->ro != 1 && |
5562 | (bdev_read_only(rdev->bdev) || | |
5563 | bdev_read_only(rdev->meta_bdev))) { | |
5564 | mddev->ro = 1; | |
5565 | if (mddev->gendisk) | |
5566 | set_disk_ro(mddev->gendisk, 1); | |
5567 | } | |
f0d76d70 | 5568 | |
4b6c1060 HM |
5569 | if (rdev->sb_page) |
5570 | mddev->has_superblocks = true; | |
5571 | ||
f0d76d70 N |
5572 | /* perform some consistency tests on the device. |
5573 | * We don't want the data to overlap the metadata, | |
58c0fed4 | 5574 | * Internal Bitmap issues have been handled elsewhere. |
f0d76d70 | 5575 | */ |
a6ff7e08 JB |
5576 | if (rdev->meta_bdev) { |
5577 | /* Nothing to check */; | |
5578 | } else if (rdev->data_offset < rdev->sb_start) { | |
58c0fed4 AN |
5579 | if (mddev->dev_sectors && |
5580 | rdev->data_offset + mddev->dev_sectors | |
0f420358 | 5581 | > rdev->sb_start) { |
9d48739e N |
5582 | pr_warn("md: %s: data overlaps metadata\n", |
5583 | mdname(mddev)); | |
f0d76d70 N |
5584 | return -EINVAL; |
5585 | } | |
5586 | } else { | |
0f420358 | 5587 | if (rdev->sb_start + rdev->sb_size/512 |
f0d76d70 | 5588 | > rdev->data_offset) { |
9d48739e N |
5589 | pr_warn("md: %s: metadata overlaps data\n", |
5590 | mdname(mddev)); | |
f0d76d70 N |
5591 | return -EINVAL; |
5592 | } | |
5593 | } | |
00bcb4ac | 5594 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
5595 | } |
5596 | ||
afeee514 KO |
5597 | if (!bioset_initialized(&mddev->bio_set)) { |
5598 | err = bioset_init(&mddev->bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5599 | if (err) | |
5600 | return err; | |
10273170 | 5601 | } |
afeee514 KO |
5602 | if (!bioset_initialized(&mddev->sync_set)) { |
5603 | err = bioset_init(&mddev->sync_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS); | |
5604 | if (err) | |
28dec870 | 5605 | return err; |
5a85071c | 5606 | } |
a167f663 | 5607 | |
1da177e4 | 5608 | spin_lock(&pers_lock); |
d9d166c2 | 5609 | pers = find_pers(mddev->level, mddev->clevel); |
2604b703 | 5610 | if (!pers || !try_module_get(pers->owner)) { |
1da177e4 | 5611 | spin_unlock(&pers_lock); |
d9d166c2 | 5612 | if (mddev->level != LEVEL_NONE) |
9d48739e N |
5613 | pr_warn("md: personality for level %d is not loaded!\n", |
5614 | mddev->level); | |
d9d166c2 | 5615 | else |
9d48739e N |
5616 | pr_warn("md: personality for level %s is not loaded!\n", |
5617 | mddev->clevel); | |
bfc9dfdc SL |
5618 | err = -EINVAL; |
5619 | goto abort; | |
1da177e4 | 5620 | } |
1da177e4 | 5621 | spin_unlock(&pers_lock); |
34817e8c N |
5622 | if (mddev->level != pers->level) { |
5623 | mddev->level = pers->level; | |
5624 | mddev->new_level = pers->level; | |
5625 | } | |
d9d166c2 | 5626 | strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel)); |
1da177e4 | 5627 | |
f6705578 | 5628 | if (mddev->reshape_position != MaxSector && |
63c70c4f | 5629 | pers->start_reshape == NULL) { |
f6705578 | 5630 | /* This personality cannot handle reshaping... */ |
f6705578 | 5631 | module_put(pers->owner); |
bfc9dfdc SL |
5632 | err = -EINVAL; |
5633 | goto abort; | |
f6705578 N |
5634 | } |
5635 | ||
7dd5e7c3 N |
5636 | if (pers->sync_request) { |
5637 | /* Warn if this is a potentially silly | |
5638 | * configuration. | |
5639 | */ | |
5640 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 5641 | struct md_rdev *rdev2; |
7dd5e7c3 | 5642 | int warned = 0; |
159ec1fc | 5643 | |
dafb20fa N |
5644 | rdev_for_each(rdev, mddev) |
5645 | rdev_for_each(rdev2, mddev) { | |
7dd5e7c3 N |
5646 | if (rdev < rdev2 && |
5647 | rdev->bdev->bd_contains == | |
5648 | rdev2->bdev->bd_contains) { | |
9d48739e N |
5649 | pr_warn("%s: WARNING: %s appears to be on the same physical disk as %s.\n", |
5650 | mdname(mddev), | |
5651 | bdevname(rdev->bdev,b), | |
5652 | bdevname(rdev2->bdev,b2)); | |
7dd5e7c3 N |
5653 | warned = 1; |
5654 | } | |
5655 | } | |
159ec1fc | 5656 | |
7dd5e7c3 | 5657 | if (warned) |
9d48739e | 5658 | pr_warn("True protection against single-disk failure might be compromised.\n"); |
7dd5e7c3 N |
5659 | } |
5660 | ||
657390d2 | 5661 | mddev->recovery = 0; |
58c0fed4 AN |
5662 | /* may be over-ridden by personality */ |
5663 | mddev->resync_max_sectors = mddev->dev_sectors; | |
5664 | ||
6ff8d8ec | 5665 | mddev->ok_start_degraded = start_dirty_degraded; |
1da177e4 | 5666 | |
0f9552b5 | 5667 | if (start_readonly && mddev->ro == 0) |
f91de92e N |
5668 | mddev->ro = 2; /* read-only, but switch on first write */ |
5669 | ||
36d091f4 | 5670 | err = pers->run(mddev); |
13e53df3 | 5671 | if (err) |
9d48739e | 5672 | pr_warn("md: pers->run() failed ...\n"); |
36d091f4 | 5673 | else if (pers->size(mddev, 0, 0) < mddev->array_sectors) { |
9d48739e N |
5674 | WARN_ONCE(!mddev->external_size, |
5675 | "%s: default size too small, but 'external_size' not in effect?\n", | |
5676 | __func__); | |
5677 | pr_warn("md: invalid array_size %llu > default size %llu\n", | |
5678 | (unsigned long long)mddev->array_sectors / 2, | |
5679 | (unsigned long long)pers->size(mddev, 0, 0) / 2); | |
b522adcd | 5680 | err = -EINVAL; |
b522adcd | 5681 | } |
36d091f4 | 5682 | if (err == 0 && pers->sync_request && |
ef99bf48 | 5683 | (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { |
f9209a32 GR |
5684 | struct bitmap *bitmap; |
5685 | ||
e64e4018 | 5686 | bitmap = md_bitmap_create(mddev, -1); |
f9209a32 GR |
5687 | if (IS_ERR(bitmap)) { |
5688 | err = PTR_ERR(bitmap); | |
9d48739e N |
5689 | pr_warn("%s: failed to create bitmap (%d)\n", |
5690 | mdname(mddev), err); | |
f9209a32 GR |
5691 | } else |
5692 | mddev->bitmap = bitmap; | |
5693 | ||
b15c2e57 | 5694 | } |
d494549a GJ |
5695 | if (err) |
5696 | goto bitmap_abort; | |
3e148a32 GJ |
5697 | |
5698 | if (mddev->bitmap_info.max_write_behind > 0) { | |
5699 | bool creat_pool = false; | |
5700 | ||
5701 | rdev_for_each(rdev, mddev) { | |
5702 | if (test_bit(WriteMostly, &rdev->flags) && | |
5703 | rdev_init_wb(rdev)) | |
5704 | creat_pool = true; | |
5705 | } | |
5706 | if (creat_pool && mddev->wb_info_pool == NULL) { | |
5707 | mddev->wb_info_pool = | |
5708 | mempool_create_kmalloc_pool(NR_WB_INFOS, | |
5709 | sizeof(struct wb_info)); | |
5710 | if (!mddev->wb_info_pool) { | |
5711 | err = -ENOMEM; | |
d494549a | 5712 | goto bitmap_abort; |
3e148a32 GJ |
5713 | } |
5714 | } | |
5715 | } | |
5716 | ||
5c675f83 | 5717 | if (mddev->queue) { |
bb086a89 SL |
5718 | bool nonrot = true; |
5719 | ||
5720 | rdev_for_each(rdev, mddev) { | |
5721 | if (rdev->raid_disk >= 0 && | |
5722 | !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) { | |
5723 | nonrot = false; | |
5724 | break; | |
5725 | } | |
5726 | } | |
5727 | if (mddev->degraded) | |
5728 | nonrot = false; | |
5729 | if (nonrot) | |
8b904b5b | 5730 | blk_queue_flag_set(QUEUE_FLAG_NONROT, mddev->queue); |
bb086a89 | 5731 | else |
8b904b5b | 5732 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, mddev->queue); |
dc3b17cc JK |
5733 | mddev->queue->backing_dev_info->congested_data = mddev; |
5734 | mddev->queue->backing_dev_info->congested_fn = md_congested; | |
5c675f83 | 5735 | } |
36d091f4 | 5736 | if (pers->sync_request) { |
00bcb4ac N |
5737 | if (mddev->kobj.sd && |
5738 | sysfs_create_group(&mddev->kobj, &md_redundancy_group)) | |
9d48739e N |
5739 | pr_warn("md: cannot register extra attributes for %s\n", |
5740 | mdname(mddev)); | |
00bcb4ac | 5741 | mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action"); |
5e55e2f5 | 5742 | } else if (mddev->ro == 2) /* auto-readonly not meaningful */ |
fd9d49ca N |
5743 | mddev->ro = 0; |
5744 | ||
1e50915f RB |
5745 | atomic_set(&mddev->max_corr_read_errors, |
5746 | MD_DEFAULT_MAX_CORRECTED_READ_ERRORS); | |
1da177e4 | 5747 | mddev->safemode = 0; |
28c1b9fd GR |
5748 | if (mddev_is_clustered(mddev)) |
5749 | mddev->safemode_delay = 0; | |
5750 | else | |
5751 | mddev->safemode_delay = (200 * HZ)/1000 +1; /* 200 msec delay */ | |
1da177e4 | 5752 | mddev->in_sync = 1; |
0ca69886 | 5753 | smp_wmb(); |
36d091f4 N |
5754 | spin_lock(&mddev->lock); |
5755 | mddev->pers = pers; | |
36d091f4 | 5756 | spin_unlock(&mddev->lock); |
dafb20fa | 5757 | rdev_for_each(rdev, mddev) |
36fad858 | 5758 | if (rdev->raid_disk >= 0) |
e5b521ee | 5759 | sysfs_link_rdev(mddev, rdev); /* failure here is OK */ |
f72ffdd6 | 5760 | |
a4a3d26d N |
5761 | if (mddev->degraded && !mddev->ro) |
5762 | /* This ensures that recovering status is reported immediately | |
5763 | * via sysfs - until a lack of spares is confirmed. | |
5764 | */ | |
5765 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
1da177e4 | 5766 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f72ffdd6 | 5767 | |
2953079c | 5768 | if (mddev->sb_flags) |
850b2b42 | 5769 | md_update_sb(mddev, 0); |
1da177e4 | 5770 | |
d7603b7e | 5771 | md_new_event(mddev); |
00bcb4ac N |
5772 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
5773 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
a99ac971 | 5774 | sysfs_notify(&mddev->kobj, NULL, "degraded"); |
1da177e4 | 5775 | return 0; |
b126194c | 5776 | |
d494549a GJ |
5777 | bitmap_abort: |
5778 | mddev_detach(mddev); | |
5779 | if (mddev->private) | |
5780 | pers->free(mddev, mddev->private); | |
5781 | mddev->private = NULL; | |
5782 | module_put(pers->owner); | |
5783 | md_bitmap_destroy(mddev); | |
b126194c | 5784 | abort: |
4bc034d3 N |
5785 | bioset_exit(&mddev->bio_set); |
5786 | bioset_exit(&mddev->sync_set); | |
b126194c | 5787 | return err; |
1da177e4 | 5788 | } |
390ee602 | 5789 | EXPORT_SYMBOL_GPL(md_run); |
1da177e4 | 5790 | |
fd01b88c | 5791 | static int do_md_run(struct mddev *mddev) |
fe60b014 N |
5792 | { |
5793 | int err; | |
5794 | ||
5795 | err = md_run(mddev); | |
5796 | if (err) | |
5797 | goto out; | |
e64e4018 | 5798 | err = md_bitmap_load(mddev); |
69e51b44 | 5799 | if (err) { |
e64e4018 | 5800 | md_bitmap_destroy(mddev); |
69e51b44 N |
5801 | goto out; |
5802 | } | |
0fd018af | 5803 | |
28c1b9fd GR |
5804 | if (mddev_is_clustered(mddev)) |
5805 | md_allow_write(mddev); | |
5806 | ||
d5d885fd SL |
5807 | /* run start up tasks that require md_thread */ |
5808 | md_start(mddev); | |
5809 | ||
0fd018af JB |
5810 | md_wakeup_thread(mddev->thread); |
5811 | md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */ | |
5812 | ||
fe60b014 N |
5813 | set_capacity(mddev->gendisk, mddev->array_sectors); |
5814 | revalidate_disk(mddev->gendisk); | |
f0b4f7e2 | 5815 | mddev->changed = 1; |
fe60b014 N |
5816 | kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); |
5817 | out: | |
5818 | return err; | |
5819 | } | |
5820 | ||
d5d885fd SL |
5821 | int md_start(struct mddev *mddev) |
5822 | { | |
5823 | int ret = 0; | |
5824 | ||
5825 | if (mddev->pers->start) { | |
5826 | set_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5827 | md_wakeup_thread(mddev->thread); | |
5828 | ret = mddev->pers->start(mddev); | |
5829 | clear_bit(MD_RECOVERY_WAIT, &mddev->recovery); | |
5830 | md_wakeup_thread(mddev->sync_thread); | |
5831 | } | |
5832 | return ret; | |
5833 | } | |
5834 | EXPORT_SYMBOL_GPL(md_start); | |
5835 | ||
fd01b88c | 5836 | static int restart_array(struct mddev *mddev) |
1da177e4 LT |
5837 | { |
5838 | struct gendisk *disk = mddev->gendisk; | |
97b20ef7 N |
5839 | struct md_rdev *rdev; |
5840 | bool has_journal = false; | |
5841 | bool has_readonly = false; | |
1da177e4 | 5842 | |
80fab1d7 | 5843 | /* Complain if it has no devices */ |
1da177e4 | 5844 | if (list_empty(&mddev->disks)) |
80fab1d7 AN |
5845 | return -ENXIO; |
5846 | if (!mddev->pers) | |
5847 | return -EINVAL; | |
5848 | if (!mddev->ro) | |
5849 | return -EBUSY; | |
339421de | 5850 | |
97b20ef7 N |
5851 | rcu_read_lock(); |
5852 | rdev_for_each_rcu(rdev, mddev) { | |
5853 | if (test_bit(Journal, &rdev->flags) && | |
5854 | !test_bit(Faulty, &rdev->flags)) | |
5855 | has_journal = true; | |
5856 | if (bdev_read_only(rdev->bdev)) | |
5857 | has_readonly = true; | |
5858 | } | |
5859 | rcu_read_unlock(); | |
5860 | if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !has_journal) | |
339421de | 5861 | /* Don't restart rw with journal missing/faulty */ |
339421de | 5862 | return -EINVAL; |
97b20ef7 N |
5863 | if (has_readonly) |
5864 | return -EROFS; | |
339421de | 5865 | |
80fab1d7 AN |
5866 | mddev->safemode = 0; |
5867 | mddev->ro = 0; | |
5868 | set_disk_ro(disk, 0); | |
9d48739e | 5869 | pr_debug("md: %s switched to read-write mode.\n", mdname(mddev)); |
80fab1d7 AN |
5870 | /* Kick recovery or resync if necessary */ |
5871 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
5872 | md_wakeup_thread(mddev->thread); | |
5873 | md_wakeup_thread(mddev->sync_thread); | |
00bcb4ac | 5874 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
80fab1d7 | 5875 | return 0; |
1da177e4 LT |
5876 | } |
5877 | ||
fd01b88c | 5878 | static void md_clean(struct mddev *mddev) |
6177b472 N |
5879 | { |
5880 | mddev->array_sectors = 0; | |
5881 | mddev->external_size = 0; | |
5882 | mddev->dev_sectors = 0; | |
5883 | mddev->raid_disks = 0; | |
5884 | mddev->recovery_cp = 0; | |
5885 | mddev->resync_min = 0; | |
5886 | mddev->resync_max = MaxSector; | |
5887 | mddev->reshape_position = MaxSector; | |
5888 | mddev->external = 0; | |
5889 | mddev->persistent = 0; | |
5890 | mddev->level = LEVEL_NONE; | |
5891 | mddev->clevel[0] = 0; | |
5892 | mddev->flags = 0; | |
2953079c | 5893 | mddev->sb_flags = 0; |
6177b472 N |
5894 | mddev->ro = 0; |
5895 | mddev->metadata_type[0] = 0; | |
5896 | mddev->chunk_sectors = 0; | |
5897 | mddev->ctime = mddev->utime = 0; | |
5898 | mddev->layout = 0; | |
5899 | mddev->max_disks = 0; | |
5900 | mddev->events = 0; | |
a8707c08 | 5901 | mddev->can_decrease_events = 0; |
6177b472 | 5902 | mddev->delta_disks = 0; |
2c810cdd | 5903 | mddev->reshape_backwards = 0; |
6177b472 N |
5904 | mddev->new_level = LEVEL_NONE; |
5905 | mddev->new_layout = 0; | |
5906 | mddev->new_chunk_sectors = 0; | |
5907 | mddev->curr_resync = 0; | |
7f7583d4 | 5908 | atomic64_set(&mddev->resync_mismatches, 0); |
6177b472 N |
5909 | mddev->suspend_lo = mddev->suspend_hi = 0; |
5910 | mddev->sync_speed_min = mddev->sync_speed_max = 0; | |
5911 | mddev->recovery = 0; | |
5912 | mddev->in_sync = 0; | |
f0b4f7e2 | 5913 | mddev->changed = 0; |
6177b472 | 5914 | mddev->degraded = 0; |
6177b472 | 5915 | mddev->safemode = 0; |
bd691922 | 5916 | mddev->private = NULL; |
c20c33f0 | 5917 | mddev->cluster_info = NULL; |
6177b472 N |
5918 | mddev->bitmap_info.offset = 0; |
5919 | mddev->bitmap_info.default_offset = 0; | |
6409bb05 | 5920 | mddev->bitmap_info.default_space = 0; |
6177b472 N |
5921 | mddev->bitmap_info.chunksize = 0; |
5922 | mddev->bitmap_info.daemon_sleep = 0; | |
5923 | mddev->bitmap_info.max_write_behind = 0; | |
c20c33f0 | 5924 | mddev->bitmap_info.nodes = 0; |
6177b472 N |
5925 | } |
5926 | ||
fd01b88c | 5927 | static void __md_stop_writes(struct mddev *mddev) |
a047e125 | 5928 | { |
6b6204ee | 5929 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
f851b60d | 5930 | flush_workqueue(md_misc_wq); |
a047e125 | 5931 | if (mddev->sync_thread) { |
a047e125 | 5932 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
a91d5ac0 | 5933 | md_reap_sync_thread(mddev); |
a047e125 N |
5934 | } |
5935 | ||
5936 | del_timer_sync(&mddev->safemode_timer); | |
5937 | ||
034e33f5 SL |
5938 | if (mddev->pers && mddev->pers->quiesce) { |
5939 | mddev->pers->quiesce(mddev, 1); | |
5940 | mddev->pers->quiesce(mddev, 0); | |
5941 | } | |
e64e4018 | 5942 | md_bitmap_flush(mddev); |
a047e125 | 5943 | |
b6d428c6 | 5944 | if (mddev->ro == 0 && |
28c1b9fd | 5945 | ((!mddev->in_sync && !mddev_is_clustered(mddev)) || |
2953079c | 5946 | mddev->sb_flags)) { |
a047e125 | 5947 | /* mark array as shutdown cleanly */ |
28c1b9fd GR |
5948 | if (!mddev_is_clustered(mddev)) |
5949 | mddev->in_sync = 1; | |
a047e125 N |
5950 | md_update_sb(mddev, 1); |
5951 | } | |
3e148a32 GJ |
5952 | mempool_destroy(mddev->wb_info_pool); |
5953 | mddev->wb_info_pool = NULL; | |
a047e125 | 5954 | } |
defad61a | 5955 | |
fd01b88c | 5956 | void md_stop_writes(struct mddev *mddev) |
defad61a | 5957 | { |
29f097c4 | 5958 | mddev_lock_nointr(mddev); |
defad61a N |
5959 | __md_stop_writes(mddev); |
5960 | mddev_unlock(mddev); | |
5961 | } | |
390ee602 | 5962 | EXPORT_SYMBOL_GPL(md_stop_writes); |
a047e125 | 5963 | |
5aa61f42 N |
5964 | static void mddev_detach(struct mddev *mddev) |
5965 | { | |
e64e4018 | 5966 | md_bitmap_wait_behind_writes(mddev); |
36d091f4 | 5967 | if (mddev->pers && mddev->pers->quiesce) { |
5aa61f42 N |
5968 | mddev->pers->quiesce(mddev, 1); |
5969 | mddev->pers->quiesce(mddev, 0); | |
5970 | } | |
5971 | md_unregister_thread(&mddev->thread); | |
5972 | if (mddev->queue) | |
5973 | blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ | |
5974 | } | |
5975 | ||
5eff3c43 | 5976 | static void __md_stop(struct mddev *mddev) |
6177b472 | 5977 | { |
36d091f4 | 5978 | struct md_personality *pers = mddev->pers; |
e64e4018 | 5979 | md_bitmap_destroy(mddev); |
5aa61f42 | 5980 | mddev_detach(mddev); |
ee5d004f N |
5981 | /* Ensure ->event_work is done */ |
5982 | flush_workqueue(md_misc_wq); | |
36d091f4 | 5983 | spin_lock(&mddev->lock); |
6177b472 | 5984 | mddev->pers = NULL; |
36d091f4 N |
5985 | spin_unlock(&mddev->lock); |
5986 | pers->free(mddev, mddev->private); | |
bd691922 | 5987 | mddev->private = NULL; |
36d091f4 N |
5988 | if (pers->sync_request && mddev->to_remove == NULL) |
5989 | mddev->to_remove = &md_redundancy_group; | |
5990 | module_put(pers->owner); | |
cca9cf90 | 5991 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); |
6aaa58c9 JW |
5992 | } |
5993 | ||
5994 | void md_stop(struct mddev *mddev) | |
5995 | { | |
5996 | /* stop the array and free an attached data structures. | |
5997 | * This is called from dm-raid | |
5998 | */ | |
5999 | __md_stop(mddev); | |
afeee514 KO |
6000 | bioset_exit(&mddev->bio_set); |
6001 | bioset_exit(&mddev->sync_set); | |
5eff3c43 N |
6002 | } |
6003 | ||
390ee602 | 6004 | EXPORT_SYMBOL_GPL(md_stop); |
6177b472 | 6005 | |
a05b7ea0 | 6006 | static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) |
a4bd82d0 N |
6007 | { |
6008 | int err = 0; | |
30b8feb7 N |
6009 | int did_freeze = 0; |
6010 | ||
6011 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6012 | did_freeze = 1; | |
6013 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6014 | md_wakeup_thread(mddev->thread); | |
6015 | } | |
f851b60d | 6016 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6017 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6018 | if (mddev->sync_thread) |
30b8feb7 N |
6019 | /* Thread might be blocked waiting for metadata update |
6020 | * which will now never happen */ | |
6021 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6022 | |
2953079c | 6023 | if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) |
88724bfa | 6024 | return -EBUSY; |
30b8feb7 | 6025 | mddev_unlock(mddev); |
f851b60d N |
6026 | wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, |
6027 | &mddev->recovery)); | |
88724bfa | 6028 | wait_event(mddev->sb_wait, |
2953079c | 6029 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
30b8feb7 N |
6030 | mddev_lock_nointr(mddev); |
6031 | ||
a4bd82d0 | 6032 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6033 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 | 6034 | mddev->sync_thread || |
af8d8e6f | 6035 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6036 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
30b8feb7 N |
6037 | if (did_freeze) { |
6038 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6039 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6040 | md_wakeup_thread(mddev->thread); |
6041 | } | |
a4bd82d0 N |
6042 | err = -EBUSY; |
6043 | goto out; | |
6044 | } | |
6045 | if (mddev->pers) { | |
defad61a | 6046 | __md_stop_writes(mddev); |
a4bd82d0 N |
6047 | |
6048 | err = -ENXIO; | |
6049 | if (mddev->ro==1) | |
6050 | goto out; | |
6051 | mddev->ro = 1; | |
6052 | set_disk_ro(mddev->gendisk, 1); | |
6053 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d N |
6054 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
6055 | md_wakeup_thread(mddev->thread); | |
00bcb4ac | 6056 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
30b8feb7 | 6057 | err = 0; |
a4bd82d0 N |
6058 | } |
6059 | out: | |
6060 | mutex_unlock(&mddev->open_mutex); | |
6061 | return err; | |
6062 | } | |
6063 | ||
9e653b63 N |
6064 | /* mode: |
6065 | * 0 - completely stop and dis-assemble array | |
9e653b63 N |
6066 | * 2 - stop but do not disassemble array |
6067 | */ | |
f72ffdd6 | 6068 | static int do_md_stop(struct mddev *mddev, int mode, |
a05b7ea0 | 6069 | struct block_device *bdev) |
1da177e4 | 6070 | { |
1da177e4 | 6071 | struct gendisk *disk = mddev->gendisk; |
3cb03002 | 6072 | struct md_rdev *rdev; |
30b8feb7 N |
6073 | int did_freeze = 0; |
6074 | ||
6075 | if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { | |
6076 | did_freeze = 1; | |
6077 | set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
6078 | md_wakeup_thread(mddev->thread); | |
6079 | } | |
f851b60d | 6080 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
30b8feb7 | 6081 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
f851b60d | 6082 | if (mddev->sync_thread) |
30b8feb7 N |
6083 | /* Thread might be blocked waiting for metadata update |
6084 | * which will now never happen */ | |
6085 | wake_up_process(mddev->sync_thread->tsk); | |
f851b60d | 6086 | |
30b8feb7 | 6087 | mddev_unlock(mddev); |
f851b60d N |
6088 | wait_event(resync_wait, (mddev->sync_thread == NULL && |
6089 | !test_bit(MD_RECOVERY_RUNNING, | |
6090 | &mddev->recovery))); | |
30b8feb7 | 6091 | mddev_lock_nointr(mddev); |
1da177e4 | 6092 | |
c8c00a69 | 6093 | mutex_lock(&mddev->open_mutex); |
9ba3b7f5 | 6094 | if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || |
30b8feb7 N |
6095 | mddev->sysfs_active || |
6096 | mddev->sync_thread || | |
af8d8e6f | 6097 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { |
9d48739e | 6098 | pr_warn("md: %s still in use.\n",mdname(mddev)); |
6e17b027 | 6099 | mutex_unlock(&mddev->open_mutex); |
30b8feb7 N |
6100 | if (did_freeze) { |
6101 | clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); | |
45eaf45d | 6102 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
30b8feb7 N |
6103 | md_wakeup_thread(mddev->thread); |
6104 | } | |
260fa034 N |
6105 | return -EBUSY; |
6106 | } | |
6e17b027 | 6107 | if (mddev->pers) { |
a4bd82d0 N |
6108 | if (mddev->ro) |
6109 | set_disk_ro(disk, 0); | |
409c57f3 | 6110 | |
defad61a | 6111 | __md_stop_writes(mddev); |
5eff3c43 | 6112 | __md_stop(mddev); |
dc3b17cc | 6113 | mddev->queue->backing_dev_info->congested_fn = NULL; |
6177b472 | 6114 | |
a4bd82d0 | 6115 | /* tell userspace to handle 'inactive' */ |
00bcb4ac | 6116 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0d4ca600 | 6117 | |
dafb20fa | 6118 | rdev_for_each(rdev, mddev) |
36fad858 NK |
6119 | if (rdev->raid_disk >= 0) |
6120 | sysfs_unlink_rdev(mddev, rdev); | |
c4647292 | 6121 | |
a4bd82d0 | 6122 | set_capacity(disk, 0); |
6e17b027 | 6123 | mutex_unlock(&mddev->open_mutex); |
f0b4f7e2 | 6124 | mddev->changed = 1; |
a4bd82d0 | 6125 | revalidate_disk(disk); |
0d4ca600 | 6126 | |
a4bd82d0 N |
6127 | if (mddev->ro) |
6128 | mddev->ro = 0; | |
6e17b027 N |
6129 | } else |
6130 | mutex_unlock(&mddev->open_mutex); | |
1da177e4 LT |
6131 | /* |
6132 | * Free resources if final stop | |
6133 | */ | |
9e653b63 | 6134 | if (mode == 0) { |
9d48739e | 6135 | pr_info("md: %s stopped.\n", mdname(mddev)); |
1da177e4 | 6136 | |
c3d9714e | 6137 | if (mddev->bitmap_info.file) { |
4af1a041 N |
6138 | struct file *f = mddev->bitmap_info.file; |
6139 | spin_lock(&mddev->lock); | |
c3d9714e | 6140 | mddev->bitmap_info.file = NULL; |
4af1a041 N |
6141 | spin_unlock(&mddev->lock); |
6142 | fput(f); | |
978f946b | 6143 | } |
c3d9714e | 6144 | mddev->bitmap_info.offset = 0; |
978f946b | 6145 | |
1da177e4 LT |
6146 | export_array(mddev); |
6147 | ||
6177b472 | 6148 | md_clean(mddev); |
efeb53c0 N |
6149 | if (mddev->hold_active == UNTIL_STOP) |
6150 | mddev->hold_active = 0; | |
a4bd82d0 | 6151 | } |
d7603b7e | 6152 | md_new_event(mddev); |
00bcb4ac | 6153 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
6e17b027 | 6154 | return 0; |
1da177e4 LT |
6155 | } |
6156 | ||
fdee8ae4 | 6157 | #ifndef MODULE |
fd01b88c | 6158 | static void autorun_array(struct mddev *mddev) |
1da177e4 | 6159 | { |
3cb03002 | 6160 | struct md_rdev *rdev; |
1da177e4 LT |
6161 | int err; |
6162 | ||
a757e64c | 6163 | if (list_empty(&mddev->disks)) |
1da177e4 | 6164 | return; |
1da177e4 | 6165 | |
9d48739e | 6166 | pr_info("md: running: "); |
1da177e4 | 6167 | |
dafb20fa | 6168 | rdev_for_each(rdev, mddev) { |
1da177e4 | 6169 | char b[BDEVNAME_SIZE]; |
9d48739e | 6170 | pr_cont("<%s>", bdevname(rdev->bdev,b)); |
1da177e4 | 6171 | } |
9d48739e | 6172 | pr_cont("\n"); |
1da177e4 | 6173 | |
d710e138 | 6174 | err = do_md_run(mddev); |
1da177e4 | 6175 | if (err) { |
9d48739e | 6176 | pr_warn("md: do_md_run() returned %d\n", err); |
a05b7ea0 | 6177 | do_md_stop(mddev, 0, NULL); |
1da177e4 LT |
6178 | } |
6179 | } | |
6180 | ||
6181 | /* | |
6182 | * lets try to run arrays based on all disks that have arrived | |
6183 | * until now. (those are in pending_raid_disks) | |
6184 | * | |
6185 | * the method: pick the first pending disk, collect all disks with | |
6186 | * the same UUID, remove all from the pending list and put them into | |
6187 | * the 'same_array' list. Then order this list based on superblock | |
6188 | * update time (freshest comes first), kick out 'old' disks and | |
6189 | * compare superblocks. If everything's fine then run it. | |
6190 | * | |
6191 | * If "unit" is allocated, then bump its reference count | |
6192 | */ | |
6193 | static void autorun_devices(int part) | |
6194 | { | |
3cb03002 | 6195 | struct md_rdev *rdev0, *rdev, *tmp; |
fd01b88c | 6196 | struct mddev *mddev; |
1da177e4 LT |
6197 | char b[BDEVNAME_SIZE]; |
6198 | ||
9d48739e | 6199 | pr_info("md: autorun ...\n"); |
1da177e4 | 6200 | while (!list_empty(&pending_raid_disks)) { |
e8703fe1 | 6201 | int unit; |
1da177e4 | 6202 | dev_t dev; |
ad01c9e3 | 6203 | LIST_HEAD(candidates); |
1da177e4 | 6204 | rdev0 = list_entry(pending_raid_disks.next, |
3cb03002 | 6205 | struct md_rdev, same_set); |
1da177e4 | 6206 | |
9d48739e | 6207 | pr_debug("md: considering %s ...\n", bdevname(rdev0->bdev,b)); |
1da177e4 | 6208 | INIT_LIST_HEAD(&candidates); |
159ec1fc | 6209 | rdev_for_each_list(rdev, tmp, &pending_raid_disks) |
1da177e4 | 6210 | if (super_90_load(rdev, rdev0, 0) >= 0) { |
9d48739e N |
6211 | pr_debug("md: adding %s ...\n", |
6212 | bdevname(rdev->bdev,b)); | |
1da177e4 LT |
6213 | list_move(&rdev->same_set, &candidates); |
6214 | } | |
6215 | /* | |
6216 | * now we have a set of devices, with all of them having | |
6217 | * mostly sane superblocks. It's time to allocate the | |
6218 | * mddev. | |
6219 | */ | |
e8703fe1 N |
6220 | if (part) { |
6221 | dev = MKDEV(mdp_major, | |
6222 | rdev0->preferred_minor << MdpMinorShift); | |
6223 | unit = MINOR(dev) >> MdpMinorShift; | |
6224 | } else { | |
6225 | dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); | |
6226 | unit = MINOR(dev); | |
6227 | } | |
6228 | if (rdev0->preferred_minor != unit) { | |
9d48739e N |
6229 | pr_warn("md: unit number in %s is bad: %d\n", |
6230 | bdevname(rdev0->bdev, b), rdev0->preferred_minor); | |
1da177e4 LT |
6231 | break; |
6232 | } | |
1da177e4 LT |
6233 | |
6234 | md_probe(dev, NULL, NULL); | |
6235 | mddev = mddev_find(dev); | |
9bbbca3a NB |
6236 | if (!mddev || !mddev->gendisk) { |
6237 | if (mddev) | |
6238 | mddev_put(mddev); | |
1da177e4 LT |
6239 | break; |
6240 | } | |
f72ffdd6 | 6241 | if (mddev_lock(mddev)) |
9d48739e | 6242 | pr_warn("md: %s locked, cannot run\n", mdname(mddev)); |
1da177e4 LT |
6243 | else if (mddev->raid_disks || mddev->major_version |
6244 | || !list_empty(&mddev->disks)) { | |
9d48739e | 6245 | pr_warn("md: %s already running, cannot run %s\n", |
1da177e4 LT |
6246 | mdname(mddev), bdevname(rdev0->bdev,b)); |
6247 | mddev_unlock(mddev); | |
6248 | } else { | |
9d48739e | 6249 | pr_debug("md: created %s\n", mdname(mddev)); |
1ec4a939 | 6250 | mddev->persistent = 1; |
159ec1fc | 6251 | rdev_for_each_list(rdev, tmp, &candidates) { |
1da177e4 LT |
6252 | list_del_init(&rdev->same_set); |
6253 | if (bind_rdev_to_array(rdev, mddev)) | |
6254 | export_rdev(rdev); | |
6255 | } | |
6256 | autorun_array(mddev); | |
6257 | mddev_unlock(mddev); | |
6258 | } | |
6259 | /* on success, candidates will be empty, on error | |
6260 | * it won't... | |
6261 | */ | |
159ec1fc | 6262 | rdev_for_each_list(rdev, tmp, &candidates) { |
4b80991c | 6263 | list_del_init(&rdev->same_set); |
1da177e4 | 6264 | export_rdev(rdev); |
4b80991c | 6265 | } |
1da177e4 LT |
6266 | mddev_put(mddev); |
6267 | } | |
9d48739e | 6268 | pr_info("md: ... autorun DONE.\n"); |
1da177e4 | 6269 | } |
fdee8ae4 | 6270 | #endif /* !MODULE */ |
1da177e4 | 6271 | |
f72ffdd6 | 6272 | static int get_version(void __user *arg) |
1da177e4 LT |
6273 | { |
6274 | mdu_version_t ver; | |
6275 | ||
6276 | ver.major = MD_MAJOR_VERSION; | |
6277 | ver.minor = MD_MINOR_VERSION; | |
6278 | ver.patchlevel = MD_PATCHLEVEL_VERSION; | |
6279 | ||
6280 | if (copy_to_user(arg, &ver, sizeof(ver))) | |
6281 | return -EFAULT; | |
6282 | ||
6283 | return 0; | |
6284 | } | |
6285 | ||
f72ffdd6 | 6286 | static int get_array_info(struct mddev *mddev, void __user *arg) |
1da177e4 LT |
6287 | { |
6288 | mdu_array_info_t info; | |
a9f326eb | 6289 | int nr,working,insync,failed,spare; |
3cb03002 | 6290 | struct md_rdev *rdev; |
1da177e4 | 6291 | |
1ca69c4b N |
6292 | nr = working = insync = failed = spare = 0; |
6293 | rcu_read_lock(); | |
6294 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 6295 | nr++; |
b2d444d7 | 6296 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 LT |
6297 | failed++; |
6298 | else { | |
6299 | working++; | |
b2d444d7 | 6300 | if (test_bit(In_sync, &rdev->flags)) |
f72ffdd6 | 6301 | insync++; |
b347af81 SL |
6302 | else if (test_bit(Journal, &rdev->flags)) |
6303 | /* TODO: add journal count to md_u.h */ | |
6304 | ; | |
1da177e4 LT |
6305 | else |
6306 | spare++; | |
6307 | } | |
6308 | } | |
1ca69c4b | 6309 | rcu_read_unlock(); |
1da177e4 LT |
6310 | |
6311 | info.major_version = mddev->major_version; | |
6312 | info.minor_version = mddev->minor_version; | |
6313 | info.patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6314 | info.ctime = clamp_t(time64_t, mddev->ctime, 0, U32_MAX); |
1da177e4 | 6315 | info.level = mddev->level; |
58c0fed4 AN |
6316 | info.size = mddev->dev_sectors / 2; |
6317 | if (info.size != mddev->dev_sectors / 2) /* overflow */ | |
284ae7ca | 6318 | info.size = -1; |
1da177e4 LT |
6319 | info.nr_disks = nr; |
6320 | info.raid_disks = mddev->raid_disks; | |
6321 | info.md_minor = mddev->md_minor; | |
6322 | info.not_persistent= !mddev->persistent; | |
6323 | ||
9ebc6ef1 | 6324 | info.utime = clamp_t(time64_t, mddev->utime, 0, U32_MAX); |
1da177e4 LT |
6325 | info.state = 0; |
6326 | if (mddev->in_sync) | |
6327 | info.state = (1<<MD_SB_CLEAN); | |
c3d9714e | 6328 | if (mddev->bitmap && mddev->bitmap_info.offset) |
9bd35920 | 6329 | info.state |= (1<<MD_SB_BITMAP_PRESENT); |
ca8895d9 GR |
6330 | if (mddev_is_clustered(mddev)) |
6331 | info.state |= (1<<MD_SB_CLUSTERED); | |
a9f326eb | 6332 | info.active_disks = insync; |
1da177e4 LT |
6333 | info.working_disks = working; |
6334 | info.failed_disks = failed; | |
6335 | info.spare_disks = spare; | |
6336 | ||
6337 | info.layout = mddev->layout; | |
9d8f0363 | 6338 | info.chunk_size = mddev->chunk_sectors << 9; |
1da177e4 LT |
6339 | |
6340 | if (copy_to_user(arg, &info, sizeof(info))) | |
6341 | return -EFAULT; | |
6342 | ||
6343 | return 0; | |
6344 | } | |
6345 | ||
f72ffdd6 | 6346 | static int get_bitmap_file(struct mddev *mddev, void __user * arg) |
32a7627c N |
6347 | { |
6348 | mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */ | |
f4ad3d38 | 6349 | char *ptr; |
4af1a041 | 6350 | int err; |
32a7627c | 6351 | |
b6878d9e | 6352 | file = kzalloc(sizeof(*file), GFP_NOIO); |
32a7627c | 6353 | if (!file) |
4af1a041 | 6354 | return -ENOMEM; |
32a7627c | 6355 | |
4af1a041 N |
6356 | err = 0; |
6357 | spin_lock(&mddev->lock); | |
25eafe1a BR |
6358 | /* bitmap enabled */ |
6359 | if (mddev->bitmap_info.file) { | |
6360 | ptr = file_path(mddev->bitmap_info.file, file->pathname, | |
6361 | sizeof(file->pathname)); | |
6362 | if (IS_ERR(ptr)) | |
6363 | err = PTR_ERR(ptr); | |
6364 | else | |
6365 | memmove(file->pathname, ptr, | |
6366 | sizeof(file->pathname)-(ptr-file->pathname)); | |
6367 | } | |
4af1a041 | 6368 | spin_unlock(&mddev->lock); |
32a7627c | 6369 | |
4af1a041 N |
6370 | if (err == 0 && |
6371 | copy_to_user(arg, file, sizeof(*file))) | |
32a7627c | 6372 | err = -EFAULT; |
4af1a041 | 6373 | |
32a7627c N |
6374 | kfree(file); |
6375 | return err; | |
6376 | } | |
6377 | ||
f72ffdd6 | 6378 | static int get_disk_info(struct mddev *mddev, void __user * arg) |
1da177e4 LT |
6379 | { |
6380 | mdu_disk_info_t info; | |
3cb03002 | 6381 | struct md_rdev *rdev; |
1da177e4 LT |
6382 | |
6383 | if (copy_from_user(&info, arg, sizeof(info))) | |
6384 | return -EFAULT; | |
6385 | ||
1ca69c4b | 6386 | rcu_read_lock(); |
57d051dc | 6387 | rdev = md_find_rdev_nr_rcu(mddev, info.number); |
1da177e4 LT |
6388 | if (rdev) { |
6389 | info.major = MAJOR(rdev->bdev->bd_dev); | |
6390 | info.minor = MINOR(rdev->bdev->bd_dev); | |
6391 | info.raid_disk = rdev->raid_disk; | |
6392 | info.state = 0; | |
b2d444d7 | 6393 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 6394 | info.state |= (1<<MD_DISK_FAULTY); |
b2d444d7 | 6395 | else if (test_bit(In_sync, &rdev->flags)) { |
1da177e4 LT |
6396 | info.state |= (1<<MD_DISK_ACTIVE); |
6397 | info.state |= (1<<MD_DISK_SYNC); | |
6398 | } | |
9efdca16 | 6399 | if (test_bit(Journal, &rdev->flags)) |
bac624f3 | 6400 | info.state |= (1<<MD_DISK_JOURNAL); |
8ddf9efe N |
6401 | if (test_bit(WriteMostly, &rdev->flags)) |
6402 | info.state |= (1<<MD_DISK_WRITEMOSTLY); | |
688834e6 N |
6403 | if (test_bit(FailFast, &rdev->flags)) |
6404 | info.state |= (1<<MD_DISK_FAILFAST); | |
1da177e4 LT |
6405 | } else { |
6406 | info.major = info.minor = 0; | |
6407 | info.raid_disk = -1; | |
6408 | info.state = (1<<MD_DISK_REMOVED); | |
6409 | } | |
1ca69c4b | 6410 | rcu_read_unlock(); |
1da177e4 LT |
6411 | |
6412 | if (copy_to_user(arg, &info, sizeof(info))) | |
6413 | return -EFAULT; | |
6414 | ||
6415 | return 0; | |
6416 | } | |
6417 | ||
f72ffdd6 | 6418 | static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) |
1da177e4 LT |
6419 | { |
6420 | char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; | |
3cb03002 | 6421 | struct md_rdev *rdev; |
1da177e4 LT |
6422 | dev_t dev = MKDEV(info->major,info->minor); |
6423 | ||
1aee41f6 GR |
6424 | if (mddev_is_clustered(mddev) && |
6425 | !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) { | |
9d48739e N |
6426 | pr_warn("%s: Cannot add to clustered mddev.\n", |
6427 | mdname(mddev)); | |
1aee41f6 GR |
6428 | return -EINVAL; |
6429 | } | |
6430 | ||
1da177e4 LT |
6431 | if (info->major != MAJOR(dev) || info->minor != MINOR(dev)) |
6432 | return -EOVERFLOW; | |
6433 | ||
6434 | if (!mddev->raid_disks) { | |
6435 | int err; | |
6436 | /* expecting a device which has a superblock */ | |
6437 | rdev = md_import_device(dev, mddev->major_version, mddev->minor_version); | |
6438 | if (IS_ERR(rdev)) { | |
9d48739e | 6439 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6440 | PTR_ERR(rdev)); |
6441 | return PTR_ERR(rdev); | |
6442 | } | |
6443 | if (!list_empty(&mddev->disks)) { | |
3cb03002 N |
6444 | struct md_rdev *rdev0 |
6445 | = list_entry(mddev->disks.next, | |
6446 | struct md_rdev, same_set); | |
a9f326eb | 6447 | err = super_types[mddev->major_version] |
1da177e4 LT |
6448 | .load_super(rdev, rdev0, mddev->minor_version); |
6449 | if (err < 0) { | |
9d48739e | 6450 | pr_warn("md: %s has different UUID to %s\n", |
f72ffdd6 | 6451 | bdevname(rdev->bdev,b), |
1da177e4 LT |
6452 | bdevname(rdev0->bdev,b2)); |
6453 | export_rdev(rdev); | |
6454 | return -EINVAL; | |
6455 | } | |
6456 | } | |
6457 | err = bind_rdev_to_array(rdev, mddev); | |
6458 | if (err) | |
6459 | export_rdev(rdev); | |
6460 | return err; | |
6461 | } | |
6462 | ||
6463 | /* | |
6464 | * add_new_disk can be used once the array is assembled | |
6465 | * to add "hot spares". They must already have a superblock | |
6466 | * written | |
6467 | */ | |
6468 | if (mddev->pers) { | |
6469 | int err; | |
6470 | if (!mddev->pers->hot_add_disk) { | |
9d48739e N |
6471 | pr_warn("%s: personality does not support diskops!\n", |
6472 | mdname(mddev)); | |
1da177e4 LT |
6473 | return -EINVAL; |
6474 | } | |
7b1e35f6 N |
6475 | if (mddev->persistent) |
6476 | rdev = md_import_device(dev, mddev->major_version, | |
6477 | mddev->minor_version); | |
6478 | else | |
6479 | rdev = md_import_device(dev, -1, -1); | |
1da177e4 | 6480 | if (IS_ERR(rdev)) { |
9d48739e | 6481 | pr_warn("md: md_import_device returned %ld\n", |
1da177e4 LT |
6482 | PTR_ERR(rdev)); |
6483 | return PTR_ERR(rdev); | |
6484 | } | |
1a855a06 | 6485 | /* set saved_raid_disk if appropriate */ |
41158c7e N |
6486 | if (!mddev->persistent) { |
6487 | if (info->state & (1<<MD_DISK_SYNC) && | |
bf572541 | 6488 | info->raid_disk < mddev->raid_disks) { |
41158c7e | 6489 | rdev->raid_disk = info->raid_disk; |
bf572541 | 6490 | set_bit(In_sync, &rdev->flags); |
8313b8e5 | 6491 | clear_bit(Bitmap_sync, &rdev->flags); |
bf572541 | 6492 | } else |
41158c7e | 6493 | rdev->raid_disk = -1; |
f466722c | 6494 | rdev->saved_raid_disk = rdev->raid_disk; |
41158c7e N |
6495 | } else |
6496 | super_types[mddev->major_version]. | |
6497 | validate_super(mddev, rdev); | |
bedd86b7 | 6498 | if ((info->state & (1<<MD_DISK_SYNC)) && |
f4563091 | 6499 | rdev->raid_disk != info->raid_disk) { |
bedd86b7 N |
6500 | /* This was a hot-add request, but events doesn't |
6501 | * match, so reject it. | |
6502 | */ | |
6503 | export_rdev(rdev); | |
6504 | return -EINVAL; | |
6505 | } | |
6506 | ||
b2d444d7 | 6507 | clear_bit(In_sync, &rdev->flags); /* just to be sure */ |
8ddf9efe N |
6508 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6509 | set_bit(WriteMostly, &rdev->flags); | |
575a80fa N |
6510 | else |
6511 | clear_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6512 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6513 | set_bit(FailFast, &rdev->flags); | |
6514 | else | |
6515 | clear_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6516 | |
f6b6ec5c SL |
6517 | if (info->state & (1<<MD_DISK_JOURNAL)) { |
6518 | struct md_rdev *rdev2; | |
6519 | bool has_journal = false; | |
6520 | ||
6521 | /* make sure no existing journal disk */ | |
6522 | rdev_for_each(rdev2, mddev) { | |
6523 | if (test_bit(Journal, &rdev2->flags)) { | |
6524 | has_journal = true; | |
6525 | break; | |
6526 | } | |
6527 | } | |
230b55fa | 6528 | if (has_journal || mddev->bitmap) { |
f6b6ec5c SL |
6529 | export_rdev(rdev); |
6530 | return -EBUSY; | |
6531 | } | |
bac624f3 | 6532 | set_bit(Journal, &rdev->flags); |
f6b6ec5c | 6533 | } |
1aee41f6 GR |
6534 | /* |
6535 | * check whether the device shows up in other nodes | |
6536 | */ | |
6537 | if (mddev_is_clustered(mddev)) { | |
dbb64f86 | 6538 | if (info->state & (1 << MD_DISK_CANDIDATE)) |
1aee41f6 | 6539 | set_bit(Candidate, &rdev->flags); |
dbb64f86 | 6540 | else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) { |
1aee41f6 | 6541 | /* --add initiated by this node */ |
dbb64f86 | 6542 | err = md_cluster_ops->add_new_disk(mddev, rdev); |
1aee41f6 | 6543 | if (err) { |
1aee41f6 GR |
6544 | export_rdev(rdev); |
6545 | return err; | |
6546 | } | |
6547 | } | |
6548 | } | |
6549 | ||
1da177e4 LT |
6550 | rdev->raid_disk = -1; |
6551 | err = bind_rdev_to_array(rdev, mddev); | |
dbb64f86 | 6552 | |
1da177e4 LT |
6553 | if (err) |
6554 | export_rdev(rdev); | |
dbb64f86 GR |
6555 | |
6556 | if (mddev_is_clustered(mddev)) { | |
e566aef1 GJ |
6557 | if (info->state & (1 << MD_DISK_CANDIDATE)) { |
6558 | if (!err) { | |
6559 | err = md_cluster_ops->new_disk_ack(mddev, | |
6560 | err == 0); | |
6561 | if (err) | |
6562 | md_kick_rdev_from_array(rdev); | |
6563 | } | |
6564 | } else { | |
dbb64f86 GR |
6565 | if (err) |
6566 | md_cluster_ops->add_new_disk_cancel(mddev); | |
6567 | else | |
6568 | err = add_bound_rdev(rdev); | |
6569 | } | |
6570 | ||
6571 | } else if (!err) | |
a6da4ef8 | 6572 | err = add_bound_rdev(rdev); |
dbb64f86 | 6573 | |
1da177e4 LT |
6574 | return err; |
6575 | } | |
6576 | ||
6577 | /* otherwise, add_new_disk is only allowed | |
6578 | * for major_version==0 superblocks | |
6579 | */ | |
6580 | if (mddev->major_version != 0) { | |
9d48739e | 6581 | pr_warn("%s: ADD_NEW_DISK not supported\n", mdname(mddev)); |
1da177e4 LT |
6582 | return -EINVAL; |
6583 | } | |
6584 | ||
6585 | if (!(info->state & (1<<MD_DISK_FAULTY))) { | |
6586 | int err; | |
d710e138 | 6587 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6588 | if (IS_ERR(rdev)) { |
9d48739e | 6589 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6590 | PTR_ERR(rdev)); |
6591 | return PTR_ERR(rdev); | |
6592 | } | |
6593 | rdev->desc_nr = info->number; | |
6594 | if (info->raid_disk < mddev->raid_disks) | |
6595 | rdev->raid_disk = info->raid_disk; | |
6596 | else | |
6597 | rdev->raid_disk = -1; | |
6598 | ||
1da177e4 | 6599 | if (rdev->raid_disk < mddev->raid_disks) |
b2d444d7 N |
6600 | if (info->state & (1<<MD_DISK_SYNC)) |
6601 | set_bit(In_sync, &rdev->flags); | |
1da177e4 | 6602 | |
8ddf9efe N |
6603 | if (info->state & (1<<MD_DISK_WRITEMOSTLY)) |
6604 | set_bit(WriteMostly, &rdev->flags); | |
688834e6 N |
6605 | if (info->state & (1<<MD_DISK_FAILFAST)) |
6606 | set_bit(FailFast, &rdev->flags); | |
8ddf9efe | 6607 | |
1da177e4 | 6608 | if (!mddev->persistent) { |
9d48739e | 6609 | pr_debug("md: nonpersistent superblock ...\n"); |
77304d2a MS |
6610 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
6611 | } else | |
57b2caa3 | 6612 | rdev->sb_start = calc_dev_sboffset(rdev); |
8190e754 | 6613 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6614 | |
2bf071bf N |
6615 | err = bind_rdev_to_array(rdev, mddev); |
6616 | if (err) { | |
6617 | export_rdev(rdev); | |
6618 | return err; | |
6619 | } | |
1da177e4 LT |
6620 | } |
6621 | ||
6622 | return 0; | |
6623 | } | |
6624 | ||
f72ffdd6 | 6625 | static int hot_remove_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6626 | { |
6627 | char b[BDEVNAME_SIZE]; | |
3cb03002 | 6628 | struct md_rdev *rdev; |
1da177e4 | 6629 | |
c42a0e26 YY |
6630 | if (!mddev->pers) |
6631 | return -ENODEV; | |
6632 | ||
1da177e4 LT |
6633 | rdev = find_rdev(mddev, dev); |
6634 | if (!rdev) | |
6635 | return -ENXIO; | |
6636 | ||
2910ff17 GR |
6637 | if (rdev->raid_disk < 0) |
6638 | goto kick_rdev; | |
293467aa | 6639 | |
3ea8929d N |
6640 | clear_bit(Blocked, &rdev->flags); |
6641 | remove_and_add_spares(mddev, rdev); | |
6642 | ||
1da177e4 LT |
6643 | if (rdev->raid_disk >= 0) |
6644 | goto busy; | |
6645 | ||
2910ff17 | 6646 | kick_rdev: |
54a88392 | 6647 | if (mddev_is_clustered(mddev)) |
88bcfef7 GR |
6648 | md_cluster_ops->remove_disk(mddev, rdev); |
6649 | ||
fb56dfef | 6650 | md_kick_rdev_from_array(rdev); |
2953079c | 6651 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6652 | if (mddev->thread) |
6653 | md_wakeup_thread(mddev->thread); | |
6654 | else | |
6655 | md_update_sb(mddev, 1); | |
d7603b7e | 6656 | md_new_event(mddev); |
1da177e4 LT |
6657 | |
6658 | return 0; | |
6659 | busy: | |
9d48739e N |
6660 | pr_debug("md: cannot remove active disk %s from %s ...\n", |
6661 | bdevname(rdev->bdev,b), mdname(mddev)); | |
1da177e4 LT |
6662 | return -EBUSY; |
6663 | } | |
6664 | ||
f72ffdd6 | 6665 | static int hot_add_disk(struct mddev *mddev, dev_t dev) |
1da177e4 LT |
6666 | { |
6667 | char b[BDEVNAME_SIZE]; | |
6668 | int err; | |
3cb03002 | 6669 | struct md_rdev *rdev; |
1da177e4 LT |
6670 | |
6671 | if (!mddev->pers) | |
6672 | return -ENODEV; | |
6673 | ||
6674 | if (mddev->major_version != 0) { | |
9d48739e | 6675 | pr_warn("%s: HOT_ADD may only be used with version-0 superblocks.\n", |
1da177e4 LT |
6676 | mdname(mddev)); |
6677 | return -EINVAL; | |
6678 | } | |
6679 | if (!mddev->pers->hot_add_disk) { | |
9d48739e | 6680 | pr_warn("%s: personality does not support diskops!\n", |
1da177e4 LT |
6681 | mdname(mddev)); |
6682 | return -EINVAL; | |
6683 | } | |
6684 | ||
d710e138 | 6685 | rdev = md_import_device(dev, -1, 0); |
1da177e4 | 6686 | if (IS_ERR(rdev)) { |
9d48739e | 6687 | pr_warn("md: error, md_import_device() returned %ld\n", |
1da177e4 LT |
6688 | PTR_ERR(rdev)); |
6689 | return -EINVAL; | |
6690 | } | |
6691 | ||
6692 | if (mddev->persistent) | |
57b2caa3 | 6693 | rdev->sb_start = calc_dev_sboffset(rdev); |
1da177e4 | 6694 | else |
77304d2a | 6695 | rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; |
1da177e4 | 6696 | |
8190e754 | 6697 | rdev->sectors = rdev->sb_start; |
1da177e4 | 6698 | |
b2d444d7 | 6699 | if (test_bit(Faulty, &rdev->flags)) { |
9d48739e | 6700 | pr_warn("md: can not hot-add faulty %s disk to %s!\n", |
1da177e4 LT |
6701 | bdevname(rdev->bdev,b), mdname(mddev)); |
6702 | err = -EINVAL; | |
6703 | goto abort_export; | |
6704 | } | |
293467aa | 6705 | |
b2d444d7 | 6706 | clear_bit(In_sync, &rdev->flags); |
1da177e4 | 6707 | rdev->desc_nr = -1; |
5842730d | 6708 | rdev->saved_raid_disk = -1; |
2bf071bf N |
6709 | err = bind_rdev_to_array(rdev, mddev); |
6710 | if (err) | |
2aa82191 | 6711 | goto abort_export; |
1da177e4 LT |
6712 | |
6713 | /* | |
6714 | * The rest should better be atomic, we can have disk failures | |
6715 | * noticed in interrupt contexts ... | |
6716 | */ | |
6717 | ||
1da177e4 LT |
6718 | rdev->raid_disk = -1; |
6719 | ||
2953079c | 6720 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
060b0689 N |
6721 | if (!mddev->thread) |
6722 | md_update_sb(mddev, 1); | |
1da177e4 LT |
6723 | /* |
6724 | * Kick recovery, maybe this spare has to be added to the | |
6725 | * array immediately. | |
6726 | */ | |
6727 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
6728 | md_wakeup_thread(mddev->thread); | |
d7603b7e | 6729 | md_new_event(mddev); |
1da177e4 LT |
6730 | return 0; |
6731 | ||
1da177e4 LT |
6732 | abort_export: |
6733 | export_rdev(rdev); | |
6734 | return err; | |
6735 | } | |
6736 | ||
fd01b88c | 6737 | static int set_bitmap_file(struct mddev *mddev, int fd) |
32a7627c | 6738 | { |
035328c2 | 6739 | int err = 0; |
32a7627c | 6740 | |
36fa3063 | 6741 | if (mddev->pers) { |
d66b1b39 | 6742 | if (!mddev->pers->quiesce || !mddev->thread) |
36fa3063 N |
6743 | return -EBUSY; |
6744 | if (mddev->recovery || mddev->sync_thread) | |
6745 | return -EBUSY; | |
6746 | /* we should be able to change the bitmap.. */ | |
6747 | } | |
32a7627c | 6748 | |
36fa3063 | 6749 | if (fd >= 0) { |
035328c2 | 6750 | struct inode *inode; |
1e594bb2 N |
6751 | struct file *f; |
6752 | ||
6753 | if (mddev->bitmap || mddev->bitmap_info.file) | |
36fa3063 | 6754 | return -EEXIST; /* cannot add when bitmap is present */ |
1e594bb2 | 6755 | f = fget(fd); |
32a7627c | 6756 | |
1e594bb2 | 6757 | if (f == NULL) { |
9d48739e N |
6758 | pr_warn("%s: error: failed to get bitmap file\n", |
6759 | mdname(mddev)); | |
36fa3063 N |
6760 | return -EBADF; |
6761 | } | |
6762 | ||
1e594bb2 | 6763 | inode = f->f_mapping->host; |
035328c2 | 6764 | if (!S_ISREG(inode->i_mode)) { |
9d48739e N |
6765 | pr_warn("%s: error: bitmap file must be a regular file\n", |
6766 | mdname(mddev)); | |
035328c2 | 6767 | err = -EBADF; |
1e594bb2 | 6768 | } else if (!(f->f_mode & FMODE_WRITE)) { |
9d48739e N |
6769 | pr_warn("%s: error: bitmap file must open for write\n", |
6770 | mdname(mddev)); | |
035328c2 N |
6771 | err = -EBADF; |
6772 | } else if (atomic_read(&inode->i_writecount) != 1) { | |
9d48739e N |
6773 | pr_warn("%s: error: bitmap file is already in use\n", |
6774 | mdname(mddev)); | |
035328c2 N |
6775 | err = -EBUSY; |
6776 | } | |
6777 | if (err) { | |
1e594bb2 | 6778 | fput(f); |
36fa3063 N |
6779 | return err; |
6780 | } | |
1e594bb2 | 6781 | mddev->bitmap_info.file = f; |
c3d9714e | 6782 | mddev->bitmap_info.offset = 0; /* file overrides offset */ |
36fa3063 N |
6783 | } else if (mddev->bitmap == NULL) |
6784 | return -ENOENT; /* cannot remove what isn't there */ | |
6785 | err = 0; | |
6786 | if (mddev->pers) { | |
69e51b44 | 6787 | if (fd >= 0) { |
f9209a32 GR |
6788 | struct bitmap *bitmap; |
6789 | ||
e64e4018 | 6790 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 6791 | mddev_suspend(mddev); |
f9209a32 GR |
6792 | if (!IS_ERR(bitmap)) { |
6793 | mddev->bitmap = bitmap; | |
e64e4018 | 6794 | err = md_bitmap_load(mddev); |
ba599aca N |
6795 | } else |
6796 | err = PTR_ERR(bitmap); | |
52a0d49d | 6797 | if (err) { |
e64e4018 | 6798 | md_bitmap_destroy(mddev); |
52a0d49d N |
6799 | fd = -1; |
6800 | } | |
9e1cc0a5 | 6801 | mddev_resume(mddev); |
52a0d49d | 6802 | } else if (fd < 0) { |
9e1cc0a5 | 6803 | mddev_suspend(mddev); |
e64e4018 | 6804 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 6805 | mddev_resume(mddev); |
d7375ab3 | 6806 | } |
d7375ab3 N |
6807 | } |
6808 | if (fd < 0) { | |
4af1a041 N |
6809 | struct file *f = mddev->bitmap_info.file; |
6810 | if (f) { | |
6811 | spin_lock(&mddev->lock); | |
6812 | mddev->bitmap_info.file = NULL; | |
6813 | spin_unlock(&mddev->lock); | |
6814 | fput(f); | |
6815 | } | |
36fa3063 N |
6816 | } |
6817 | ||
32a7627c N |
6818 | return err; |
6819 | } | |
6820 | ||
1da177e4 LT |
6821 | /* |
6822 | * set_array_info is used two different ways | |
6823 | * The original usage is when creating a new array. | |
6824 | * In this usage, raid_disks is > 0 and it together with | |
6825 | * level, size, not_persistent,layout,chunksize determine the | |
6826 | * shape of the array. | |
6827 | * This will always create an array with a type-0.90.0 superblock. | |
6828 | * The newer usage is when assembling an array. | |
6829 | * In this case raid_disks will be 0, and the major_version field is | |
6830 | * use to determine which style super-blocks are to be found on the devices. | |
6831 | * The minor and patch _version numbers are also kept incase the | |
6832 | * super_block handler wishes to interpret them. | |
6833 | */ | |
f72ffdd6 | 6834 | static int set_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
6835 | { |
6836 | ||
6837 | if (info->raid_disks == 0) { | |
6838 | /* just setting version number for superblock loading */ | |
6839 | if (info->major_version < 0 || | |
50511da3 | 6840 | info->major_version >= ARRAY_SIZE(super_types) || |
1da177e4 LT |
6841 | super_types[info->major_version].name == NULL) { |
6842 | /* maybe try to auto-load a module? */ | |
9d48739e | 6843 | pr_warn("md: superblock version %d not known\n", |
1da177e4 LT |
6844 | info->major_version); |
6845 | return -EINVAL; | |
6846 | } | |
6847 | mddev->major_version = info->major_version; | |
6848 | mddev->minor_version = info->minor_version; | |
6849 | mddev->patch_version = info->patch_version; | |
3f9d7b0d | 6850 | mddev->persistent = !info->not_persistent; |
cbd19983 N |
6851 | /* ensure mddev_put doesn't delete this now that there |
6852 | * is some minimal configuration. | |
6853 | */ | |
9ebc6ef1 | 6854 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6855 | return 0; |
6856 | } | |
6857 | mddev->major_version = MD_MAJOR_VERSION; | |
6858 | mddev->minor_version = MD_MINOR_VERSION; | |
6859 | mddev->patch_version = MD_PATCHLEVEL_VERSION; | |
9ebc6ef1 | 6860 | mddev->ctime = ktime_get_real_seconds(); |
1da177e4 LT |
6861 | |
6862 | mddev->level = info->level; | |
17115e03 | 6863 | mddev->clevel[0] = 0; |
58c0fed4 | 6864 | mddev->dev_sectors = 2 * (sector_t)info->size; |
1da177e4 LT |
6865 | mddev->raid_disks = info->raid_disks; |
6866 | /* don't set md_minor, it is determined by which /dev/md* was | |
6867 | * openned | |
6868 | */ | |
6869 | if (info->state & (1<<MD_SB_CLEAN)) | |
6870 | mddev->recovery_cp = MaxSector; | |
6871 | else | |
6872 | mddev->recovery_cp = 0; | |
6873 | mddev->persistent = ! info->not_persistent; | |
e691063a | 6874 | mddev->external = 0; |
1da177e4 LT |
6875 | |
6876 | mddev->layout = info->layout; | |
9d8f0363 | 6877 | mddev->chunk_sectors = info->chunk_size >> 9; |
1da177e4 | 6878 | |
2953079c | 6879 | if (mddev->persistent) { |
1b3bae49 N |
6880 | mddev->max_disks = MD_SB_DISKS; |
6881 | mddev->flags = 0; | |
6882 | mddev->sb_flags = 0; | |
2953079c SL |
6883 | } |
6884 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); | |
1da177e4 | 6885 | |
c3d9714e | 6886 | mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9; |
6409bb05 | 6887 | mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9); |
c3d9714e | 6888 | mddev->bitmap_info.offset = 0; |
b2a2703c | 6889 | |
f6705578 N |
6890 | mddev->reshape_position = MaxSector; |
6891 | ||
1da177e4 LT |
6892 | /* |
6893 | * Generate a 128 bit UUID | |
6894 | */ | |
6895 | get_random_bytes(mddev->uuid, 16); | |
6896 | ||
f6705578 | 6897 | mddev->new_level = mddev->level; |
664e7c41 | 6898 | mddev->new_chunk_sectors = mddev->chunk_sectors; |
f6705578 N |
6899 | mddev->new_layout = mddev->layout; |
6900 | mddev->delta_disks = 0; | |
2c810cdd | 6901 | mddev->reshape_backwards = 0; |
f6705578 | 6902 | |
1da177e4 LT |
6903 | return 0; |
6904 | } | |
6905 | ||
fd01b88c | 6906 | void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors) |
1f403624 | 6907 | { |
efa4b77b | 6908 | lockdep_assert_held(&mddev->reconfig_mutex); |
b522adcd DW |
6909 | |
6910 | if (mddev->external_size) | |
6911 | return; | |
6912 | ||
1f403624 DW |
6913 | mddev->array_sectors = array_sectors; |
6914 | } | |
6915 | EXPORT_SYMBOL(md_set_array_sectors); | |
6916 | ||
fd01b88c | 6917 | static int update_size(struct mddev *mddev, sector_t num_sectors) |
a35b0d69 | 6918 | { |
3cb03002 | 6919 | struct md_rdev *rdev; |
a35b0d69 | 6920 | int rv; |
d71f9f88 | 6921 | int fit = (num_sectors == 0); |
818da59f | 6922 | sector_t old_dev_sectors = mddev->dev_sectors; |
ab5a98b1 | 6923 | |
a35b0d69 N |
6924 | if (mddev->pers->resize == NULL) |
6925 | return -EINVAL; | |
d71f9f88 AN |
6926 | /* The "num_sectors" is the number of sectors of each device that |
6927 | * is used. This can only make sense for arrays with redundancy. | |
6928 | * linear and raid0 always use whatever space is available. We can only | |
6929 | * consider changing this number if no resync or reconstruction is | |
6930 | * happening, and if the new size is acceptable. It must fit before the | |
0f420358 | 6931 | * sb_start or, if that is <data_offset, it must fit before the size |
d71f9f88 AN |
6932 | * of each device. If num_sectors is zero, we find the largest size |
6933 | * that fits. | |
a35b0d69 | 6934 | */ |
f851b60d N |
6935 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || |
6936 | mddev->sync_thread) | |
a35b0d69 | 6937 | return -EBUSY; |
bd8839e0 N |
6938 | if (mddev->ro) |
6939 | return -EROFS; | |
a4a6125a | 6940 | |
dafb20fa | 6941 | rdev_for_each(rdev, mddev) { |
dd8ac336 | 6942 | sector_t avail = rdev->sectors; |
01ab5662 | 6943 | |
d71f9f88 AN |
6944 | if (fit && (num_sectors == 0 || num_sectors > avail)) |
6945 | num_sectors = avail; | |
6946 | if (avail < num_sectors) | |
a35b0d69 N |
6947 | return -ENOSPC; |
6948 | } | |
d71f9f88 | 6949 | rv = mddev->pers->resize(mddev, num_sectors); |
c9483634 | 6950 | if (!rv) { |
818da59f GJ |
6951 | if (mddev_is_clustered(mddev)) |
6952 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
6953 | else if (mddev->queue) { | |
c9483634 GJ |
6954 | set_capacity(mddev->gendisk, mddev->array_sectors); |
6955 | revalidate_disk(mddev->gendisk); | |
6956 | } | |
6957 | } | |
a35b0d69 N |
6958 | return rv; |
6959 | } | |
6960 | ||
fd01b88c | 6961 | static int update_raid_disks(struct mddev *mddev, int raid_disks) |
da943b99 N |
6962 | { |
6963 | int rv; | |
c6563a8c | 6964 | struct md_rdev *rdev; |
da943b99 | 6965 | /* change the number of raid disks */ |
63c70c4f | 6966 | if (mddev->pers->check_reshape == NULL) |
da943b99 | 6967 | return -EINVAL; |
bd8839e0 N |
6968 | if (mddev->ro) |
6969 | return -EROFS; | |
da943b99 | 6970 | if (raid_disks <= 0 || |
233fca36 | 6971 | (mddev->max_disks && raid_disks >= mddev->max_disks)) |
da943b99 | 6972 | return -EINVAL; |
f851b60d N |
6973 | if (mddev->sync_thread || |
6974 | test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || | |
6975 | mddev->reshape_position != MaxSector) | |
da943b99 | 6976 | return -EBUSY; |
c6563a8c N |
6977 | |
6978 | rdev_for_each(rdev, mddev) { | |
6979 | if (mddev->raid_disks < raid_disks && | |
6980 | rdev->data_offset < rdev->new_data_offset) | |
6981 | return -EINVAL; | |
6982 | if (mddev->raid_disks > raid_disks && | |
6983 | rdev->data_offset > rdev->new_data_offset) | |
6984 | return -EINVAL; | |
6985 | } | |
6986 | ||
63c70c4f | 6987 | mddev->delta_disks = raid_disks - mddev->raid_disks; |
2c810cdd N |
6988 | if (mddev->delta_disks < 0) |
6989 | mddev->reshape_backwards = 1; | |
6990 | else if (mddev->delta_disks > 0) | |
6991 | mddev->reshape_backwards = 0; | |
63c70c4f N |
6992 | |
6993 | rv = mddev->pers->check_reshape(mddev); | |
2c810cdd | 6994 | if (rv < 0) { |
de171cb9 | 6995 | mddev->delta_disks = 0; |
2c810cdd N |
6996 | mddev->reshape_backwards = 0; |
6997 | } | |
da943b99 N |
6998 | return rv; |
6999 | } | |
7000 | ||
1da177e4 LT |
7001 | /* |
7002 | * update_array_info is used to change the configuration of an | |
7003 | * on-line array. | |
7004 | * The version, ctime,level,size,raid_disks,not_persistent, layout,chunk_size | |
7005 | * fields in the info are checked against the array. | |
7006 | * Any differences that cannot be handled will cause an error. | |
7007 | * Normally, only one change can be managed at a time. | |
7008 | */ | |
fd01b88c | 7009 | static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) |
1da177e4 LT |
7010 | { |
7011 | int rv = 0; | |
7012 | int cnt = 0; | |
36fa3063 N |
7013 | int state = 0; |
7014 | ||
7015 | /* calculate expected state,ignoring low bits */ | |
c3d9714e | 7016 | if (mddev->bitmap && mddev->bitmap_info.offset) |
36fa3063 | 7017 | state |= (1 << MD_SB_BITMAP_PRESENT); |
1da177e4 LT |
7018 | |
7019 | if (mddev->major_version != info->major_version || | |
7020 | mddev->minor_version != info->minor_version || | |
7021 | /* mddev->patch_version != info->patch_version || */ | |
7022 | mddev->ctime != info->ctime || | |
7023 | mddev->level != info->level || | |
7024 | /* mddev->layout != info->layout || */ | |
4e023612 | 7025 | mddev->persistent != !info->not_persistent || |
9d8f0363 | 7026 | mddev->chunk_sectors != info->chunk_size >> 9 || |
36fa3063 N |
7027 | /* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */ |
7028 | ((state^info->state) & 0xfffffe00) | |
7029 | ) | |
1da177e4 LT |
7030 | return -EINVAL; |
7031 | /* Check there is only one change */ | |
58c0fed4 AN |
7032 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
7033 | cnt++; | |
7034 | if (mddev->raid_disks != info->raid_disks) | |
7035 | cnt++; | |
7036 | if (mddev->layout != info->layout) | |
7037 | cnt++; | |
7038 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) | |
7039 | cnt++; | |
7040 | if (cnt == 0) | |
7041 | return 0; | |
7042 | if (cnt > 1) | |
7043 | return -EINVAL; | |
1da177e4 LT |
7044 | |
7045 | if (mddev->layout != info->layout) { | |
7046 | /* Change layout | |
7047 | * we don't need to do anything at the md level, the | |
7048 | * personality will take care of it all. | |
7049 | */ | |
50ac168a | 7050 | if (mddev->pers->check_reshape == NULL) |
1da177e4 | 7051 | return -EINVAL; |
597a711b N |
7052 | else { |
7053 | mddev->new_layout = info->layout; | |
50ac168a | 7054 | rv = mddev->pers->check_reshape(mddev); |
597a711b N |
7055 | if (rv) |
7056 | mddev->new_layout = mddev->layout; | |
7057 | return rv; | |
7058 | } | |
1da177e4 | 7059 | } |
58c0fed4 | 7060 | if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) |
d71f9f88 | 7061 | rv = update_size(mddev, (sector_t)info->size * 2); |
a35b0d69 | 7062 | |
da943b99 N |
7063 | if (mddev->raid_disks != info->raid_disks) |
7064 | rv = update_raid_disks(mddev, info->raid_disks); | |
7065 | ||
36fa3063 | 7066 | if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) { |
293467aa GR |
7067 | if (mddev->pers->quiesce == NULL || mddev->thread == NULL) { |
7068 | rv = -EINVAL; | |
7069 | goto err; | |
7070 | } | |
7071 | if (mddev->recovery || mddev->sync_thread) { | |
7072 | rv = -EBUSY; | |
7073 | goto err; | |
7074 | } | |
36fa3063 | 7075 | if (info->state & (1<<MD_SB_BITMAP_PRESENT)) { |
f9209a32 | 7076 | struct bitmap *bitmap; |
36fa3063 | 7077 | /* add the bitmap */ |
293467aa GR |
7078 | if (mddev->bitmap) { |
7079 | rv = -EEXIST; | |
7080 | goto err; | |
7081 | } | |
7082 | if (mddev->bitmap_info.default_offset == 0) { | |
7083 | rv = -EINVAL; | |
7084 | goto err; | |
7085 | } | |
c3d9714e N |
7086 | mddev->bitmap_info.offset = |
7087 | mddev->bitmap_info.default_offset; | |
6409bb05 N |
7088 | mddev->bitmap_info.space = |
7089 | mddev->bitmap_info.default_space; | |
e64e4018 | 7090 | bitmap = md_bitmap_create(mddev, -1); |
9e1cc0a5 | 7091 | mddev_suspend(mddev); |
f9209a32 GR |
7092 | if (!IS_ERR(bitmap)) { |
7093 | mddev->bitmap = bitmap; | |
e64e4018 | 7094 | rv = md_bitmap_load(mddev); |
ba599aca N |
7095 | } else |
7096 | rv = PTR_ERR(bitmap); | |
36fa3063 | 7097 | if (rv) |
e64e4018 | 7098 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7099 | mddev_resume(mddev); |
36fa3063 N |
7100 | } else { |
7101 | /* remove the bitmap */ | |
293467aa GR |
7102 | if (!mddev->bitmap) { |
7103 | rv = -ENOENT; | |
7104 | goto err; | |
7105 | } | |
7106 | if (mddev->bitmap->storage.file) { | |
7107 | rv = -EINVAL; | |
7108 | goto err; | |
7109 | } | |
f6a2dc64 GJ |
7110 | if (mddev->bitmap_info.nodes) { |
7111 | /* hold PW on all the bitmap lock */ | |
7112 | if (md_cluster_ops->lock_all_bitmaps(mddev) <= 0) { | |
9d48739e | 7113 | pr_warn("md: can't change bitmap to none since the array is in use by more than one node\n"); |
f6a2dc64 GJ |
7114 | rv = -EPERM; |
7115 | md_cluster_ops->unlock_all_bitmaps(mddev); | |
7116 | goto err; | |
7117 | } | |
7118 | ||
7119 | mddev->bitmap_info.nodes = 0; | |
7120 | md_cluster_ops->leave(mddev); | |
7121 | } | |
9e1cc0a5 | 7122 | mddev_suspend(mddev); |
e64e4018 | 7123 | md_bitmap_destroy(mddev); |
9e1cc0a5 | 7124 | mddev_resume(mddev); |
c3d9714e | 7125 | mddev->bitmap_info.offset = 0; |
36fa3063 N |
7126 | } |
7127 | } | |
850b2b42 | 7128 | md_update_sb(mddev, 1); |
293467aa GR |
7129 | return rv; |
7130 | err: | |
1da177e4 LT |
7131 | return rv; |
7132 | } | |
7133 | ||
fd01b88c | 7134 | static int set_disk_faulty(struct mddev *mddev, dev_t dev) |
1da177e4 | 7135 | { |
3cb03002 | 7136 | struct md_rdev *rdev; |
1ca69c4b | 7137 | int err = 0; |
1da177e4 LT |
7138 | |
7139 | if (mddev->pers == NULL) | |
7140 | return -ENODEV; | |
7141 | ||
1ca69c4b | 7142 | rcu_read_lock(); |
1532d9e8 | 7143 | rdev = md_find_rdev_rcu(mddev, dev); |
1da177e4 | 7144 | if (!rdev) |
1ca69c4b N |
7145 | err = -ENODEV; |
7146 | else { | |
7147 | md_error(mddev, rdev); | |
7148 | if (!test_bit(Faulty, &rdev->flags)) | |
7149 | err = -EBUSY; | |
7150 | } | |
7151 | rcu_read_unlock(); | |
7152 | return err; | |
1da177e4 LT |
7153 | } |
7154 | ||
2f9618ce AN |
7155 | /* |
7156 | * We have a problem here : there is no easy way to give a CHS | |
7157 | * virtual geometry. We currently pretend that we have a 2 heads | |
7158 | * 4 sectors (with a BIG number of cylinders...). This drives | |
7159 | * dosfs just mad... ;-) | |
7160 | */ | |
a885c8c4 CH |
7161 | static int md_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
7162 | { | |
fd01b88c | 7163 | struct mddev *mddev = bdev->bd_disk->private_data; |
a885c8c4 CH |
7164 | |
7165 | geo->heads = 2; | |
7166 | geo->sectors = 4; | |
49ce6cea | 7167 | geo->cylinders = mddev->array_sectors / 8; |
a885c8c4 CH |
7168 | return 0; |
7169 | } | |
7170 | ||
cb335f88 NS |
7171 | static inline bool md_ioctl_valid(unsigned int cmd) |
7172 | { | |
7173 | switch (cmd) { | |
7174 | case ADD_NEW_DISK: | |
7175 | case BLKROSET: | |
7176 | case GET_ARRAY_INFO: | |
7177 | case GET_BITMAP_FILE: | |
7178 | case GET_DISK_INFO: | |
7179 | case HOT_ADD_DISK: | |
7180 | case HOT_REMOVE_DISK: | |
cb335f88 NS |
7181 | case RAID_AUTORUN: |
7182 | case RAID_VERSION: | |
7183 | case RESTART_ARRAY_RW: | |
7184 | case RUN_ARRAY: | |
7185 | case SET_ARRAY_INFO: | |
7186 | case SET_BITMAP_FILE: | |
7187 | case SET_DISK_FAULTY: | |
7188 | case STOP_ARRAY: | |
7189 | case STOP_ARRAY_RO: | |
1aee41f6 | 7190 | case CLUSTERED_DISK_NACK: |
cb335f88 NS |
7191 | return true; |
7192 | default: | |
7193 | return false; | |
7194 | } | |
7195 | } | |
7196 | ||
a39907fa | 7197 | static int md_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
7198 | unsigned int cmd, unsigned long arg) |
7199 | { | |
7200 | int err = 0; | |
7201 | void __user *argp = (void __user *)arg; | |
fd01b88c | 7202 | struct mddev *mddev = NULL; |
e2218350 | 7203 | int ro; |
065e519e | 7204 | bool did_set_md_closing = false; |
1da177e4 | 7205 | |
cb335f88 NS |
7206 | if (!md_ioctl_valid(cmd)) |
7207 | return -ENOTTY; | |
7208 | ||
506c9e44 N |
7209 | switch (cmd) { |
7210 | case RAID_VERSION: | |
7211 | case GET_ARRAY_INFO: | |
7212 | case GET_DISK_INFO: | |
7213 | break; | |
7214 | default: | |
7215 | if (!capable(CAP_SYS_ADMIN)) | |
7216 | return -EACCES; | |
7217 | } | |
1da177e4 LT |
7218 | |
7219 | /* | |
7220 | * Commands dealing with the RAID driver but not any | |
7221 | * particular array: | |
7222 | */ | |
c02c0aeb N |
7223 | switch (cmd) { |
7224 | case RAID_VERSION: | |
7225 | err = get_version(argp); | |
3adc28d8 | 7226 | goto out; |
1da177e4 | 7227 | |
1da177e4 | 7228 | #ifndef MODULE |
c02c0aeb N |
7229 | case RAID_AUTORUN: |
7230 | err = 0; | |
7231 | autostart_arrays(arg); | |
3adc28d8 | 7232 | goto out; |
1da177e4 | 7233 | #endif |
c02c0aeb | 7234 | default:; |
1da177e4 LT |
7235 | } |
7236 | ||
7237 | /* | |
7238 | * Commands creating/starting a new array: | |
7239 | */ | |
7240 | ||
a39907fa | 7241 | mddev = bdev->bd_disk->private_data; |
1da177e4 LT |
7242 | |
7243 | if (!mddev) { | |
7244 | BUG(); | |
3adc28d8 | 7245 | goto out; |
1da177e4 LT |
7246 | } |
7247 | ||
1ca69c4b N |
7248 | /* Some actions do not requires the mutex */ |
7249 | switch (cmd) { | |
7250 | case GET_ARRAY_INFO: | |
7251 | if (!mddev->raid_disks && !mddev->external) | |
7252 | err = -ENODEV; | |
7253 | else | |
7254 | err = get_array_info(mddev, argp); | |
3adc28d8 | 7255 | goto out; |
1ca69c4b N |
7256 | |
7257 | case GET_DISK_INFO: | |
7258 | if (!mddev->raid_disks && !mddev->external) | |
7259 | err = -ENODEV; | |
7260 | else | |
7261 | err = get_disk_info(mddev, argp); | |
3adc28d8 | 7262 | goto out; |
1ca69c4b N |
7263 | |
7264 | case SET_DISK_FAULTY: | |
7265 | err = set_disk_faulty(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7266 | goto out; |
4af1a041 N |
7267 | |
7268 | case GET_BITMAP_FILE: | |
7269 | err = get_bitmap_file(mddev, argp); | |
7270 | goto out; | |
7271 | ||
1ca69c4b N |
7272 | } |
7273 | ||
a7a3f08d N |
7274 | if (cmd == ADD_NEW_DISK) |
7275 | /* need to ensure md_delayed_delete() has completed */ | |
7276 | flush_workqueue(md_misc_wq); | |
7277 | ||
90f5f7ad HR |
7278 | if (cmd == HOT_REMOVE_DISK) |
7279 | /* need to ensure recovery thread has run */ | |
7280 | wait_event_interruptible_timeout(mddev->sb_wait, | |
7281 | !test_bit(MD_RECOVERY_NEEDED, | |
82a301cb | 7282 | &mddev->recovery), |
90f5f7ad | 7283 | msecs_to_jiffies(5000)); |
260fa034 N |
7284 | if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) { |
7285 | /* Need to flush page cache, and ensure no-one else opens | |
7286 | * and writes | |
7287 | */ | |
7288 | mutex_lock(&mddev->open_mutex); | |
9ba3b7f5 | 7289 | if (mddev->pers && atomic_read(&mddev->openers) > 1) { |
260fa034 N |
7290 | mutex_unlock(&mddev->open_mutex); |
7291 | err = -EBUSY; | |
3adc28d8 | 7292 | goto out; |
260fa034 | 7293 | } |
065e519e | 7294 | WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); |
af8d8e6f | 7295 | set_bit(MD_CLOSING, &mddev->flags); |
065e519e | 7296 | did_set_md_closing = true; |
260fa034 N |
7297 | mutex_unlock(&mddev->open_mutex); |
7298 | sync_blockdev(bdev); | |
7299 | } | |
1da177e4 LT |
7300 | err = mddev_lock(mddev); |
7301 | if (err) { | |
9d48739e N |
7302 | pr_debug("md: ioctl lock interrupted, reason %d, cmd %d\n", |
7303 | err, cmd); | |
3adc28d8 | 7304 | goto out; |
1da177e4 LT |
7305 | } |
7306 | ||
c02c0aeb N |
7307 | if (cmd == SET_ARRAY_INFO) { |
7308 | mdu_array_info_t info; | |
7309 | if (!arg) | |
7310 | memset(&info, 0, sizeof(info)); | |
7311 | else if (copy_from_user(&info, argp, sizeof(info))) { | |
7312 | err = -EFAULT; | |
3adc28d8 | 7313 | goto unlock; |
c02c0aeb N |
7314 | } |
7315 | if (mddev->pers) { | |
7316 | err = update_array_info(mddev, &info); | |
7317 | if (err) { | |
9d48739e | 7318 | pr_warn("md: couldn't update array info. %d\n", err); |
3adc28d8 | 7319 | goto unlock; |
1da177e4 | 7320 | } |
3adc28d8 | 7321 | goto unlock; |
c02c0aeb N |
7322 | } |
7323 | if (!list_empty(&mddev->disks)) { | |
9d48739e | 7324 | pr_warn("md: array %s already has disks!\n", mdname(mddev)); |
c02c0aeb | 7325 | err = -EBUSY; |
3adc28d8 | 7326 | goto unlock; |
c02c0aeb N |
7327 | } |
7328 | if (mddev->raid_disks) { | |
9d48739e | 7329 | pr_warn("md: array %s already initialised!\n", mdname(mddev)); |
c02c0aeb | 7330 | err = -EBUSY; |
3adc28d8 | 7331 | goto unlock; |
c02c0aeb N |
7332 | } |
7333 | err = set_array_info(mddev, &info); | |
7334 | if (err) { | |
9d48739e | 7335 | pr_warn("md: couldn't set array info. %d\n", err); |
3adc28d8 | 7336 | goto unlock; |
c02c0aeb | 7337 | } |
3adc28d8 | 7338 | goto unlock; |
1da177e4 LT |
7339 | } |
7340 | ||
7341 | /* | |
7342 | * Commands querying/configuring an existing array: | |
7343 | */ | |
32a7627c | 7344 | /* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY, |
3f9d7b0d | 7345 | * RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */ |
a17184a9 N |
7346 | if ((!mddev->raid_disks && !mddev->external) |
7347 | && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY | |
7348 | && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE | |
7349 | && cmd != GET_BITMAP_FILE) { | |
1da177e4 | 7350 | err = -ENODEV; |
3adc28d8 | 7351 | goto unlock; |
1da177e4 LT |
7352 | } |
7353 | ||
7354 | /* | |
7355 | * Commands even a read-only array can execute: | |
7356 | */ | |
c02c0aeb | 7357 | switch (cmd) { |
c02c0aeb N |
7358 | case RESTART_ARRAY_RW: |
7359 | err = restart_array(mddev); | |
3adc28d8 | 7360 | goto unlock; |
1da177e4 | 7361 | |
c02c0aeb N |
7362 | case STOP_ARRAY: |
7363 | err = do_md_stop(mddev, 0, bdev); | |
3adc28d8 | 7364 | goto unlock; |
1da177e4 | 7365 | |
c02c0aeb N |
7366 | case STOP_ARRAY_RO: |
7367 | err = md_set_readonly(mddev, bdev); | |
3adc28d8 | 7368 | goto unlock; |
1da177e4 | 7369 | |
3ea8929d N |
7370 | case HOT_REMOVE_DISK: |
7371 | err = hot_remove_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7372 | goto unlock; |
3ea8929d | 7373 | |
7ceb17e8 N |
7374 | case ADD_NEW_DISK: |
7375 | /* We can support ADD_NEW_DISK on read-only arrays | |
466ad292 | 7376 | * only if we are re-adding a preexisting device. |
7ceb17e8 N |
7377 | * So require mddev->pers and MD_DISK_SYNC. |
7378 | */ | |
7379 | if (mddev->pers) { | |
7380 | mdu_disk_info_t info; | |
7381 | if (copy_from_user(&info, argp, sizeof(info))) | |
7382 | err = -EFAULT; | |
7383 | else if (!(info.state & (1<<MD_DISK_SYNC))) | |
7384 | /* Need to clear read-only for this */ | |
7385 | break; | |
7386 | else | |
7387 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7388 | goto unlock; |
7ceb17e8 N |
7389 | } |
7390 | break; | |
7391 | ||
c02c0aeb N |
7392 | case BLKROSET: |
7393 | if (get_user(ro, (int __user *)(arg))) { | |
7394 | err = -EFAULT; | |
3adc28d8 | 7395 | goto unlock; |
c02c0aeb N |
7396 | } |
7397 | err = -EINVAL; | |
e2218350 | 7398 | |
c02c0aeb N |
7399 | /* if the bdev is going readonly the value of mddev->ro |
7400 | * does not matter, no writes are coming | |
7401 | */ | |
7402 | if (ro) | |
3adc28d8 | 7403 | goto unlock; |
e2218350 | 7404 | |
c02c0aeb N |
7405 | /* are we are already prepared for writes? */ |
7406 | if (mddev->ro != 1) | |
3adc28d8 | 7407 | goto unlock; |
e2218350 | 7408 | |
c02c0aeb N |
7409 | /* transitioning to readauto need only happen for |
7410 | * arrays that call md_write_start | |
7411 | */ | |
7412 | if (mddev->pers) { | |
7413 | err = restart_array(mddev); | |
7414 | if (err == 0) { | |
7415 | mddev->ro = 2; | |
7416 | set_disk_ro(mddev->gendisk, 0); | |
e2218350 | 7417 | } |
c02c0aeb | 7418 | } |
3adc28d8 | 7419 | goto unlock; |
1da177e4 LT |
7420 | } |
7421 | ||
7422 | /* | |
7423 | * The remaining ioctls are changing the state of the | |
f91de92e | 7424 | * superblock, so we do not allow them on read-only arrays. |
1da177e4 | 7425 | */ |
326eb17d | 7426 | if (mddev->ro && mddev->pers) { |
f91de92e N |
7427 | if (mddev->ro == 2) { |
7428 | mddev->ro = 0; | |
00bcb4ac | 7429 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
0fd62b86 | 7430 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
f3378b48 N |
7431 | /* mddev_unlock will wake thread */ |
7432 | /* If a device failed while we were read-only, we | |
7433 | * need to make sure the metadata is updated now. | |
7434 | */ | |
2953079c | 7435 | if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) { |
f3378b48 N |
7436 | mddev_unlock(mddev); |
7437 | wait_event(mddev->sb_wait, | |
2953079c SL |
7438 | !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) && |
7439 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); | |
29f097c4 | 7440 | mddev_lock_nointr(mddev); |
f3378b48 | 7441 | } |
f91de92e N |
7442 | } else { |
7443 | err = -EROFS; | |
3adc28d8 | 7444 | goto unlock; |
f91de92e | 7445 | } |
1da177e4 LT |
7446 | } |
7447 | ||
c02c0aeb N |
7448 | switch (cmd) { |
7449 | case ADD_NEW_DISK: | |
1da177e4 | 7450 | { |
c02c0aeb N |
7451 | mdu_disk_info_t info; |
7452 | if (copy_from_user(&info, argp, sizeof(info))) | |
7453 | err = -EFAULT; | |
7454 | else | |
7455 | err = add_new_disk(mddev, &info); | |
3adc28d8 | 7456 | goto unlock; |
c02c0aeb | 7457 | } |
1da177e4 | 7458 | |
1aee41f6 GR |
7459 | case CLUSTERED_DISK_NACK: |
7460 | if (mddev_is_clustered(mddev)) | |
7461 | md_cluster_ops->new_disk_ack(mddev, false); | |
7462 | else | |
7463 | err = -EINVAL; | |
7464 | goto unlock; | |
7465 | ||
c02c0aeb N |
7466 | case HOT_ADD_DISK: |
7467 | err = hot_add_disk(mddev, new_decode_dev(arg)); | |
3adc28d8 | 7468 | goto unlock; |
1da177e4 | 7469 | |
c02c0aeb N |
7470 | case RUN_ARRAY: |
7471 | err = do_md_run(mddev); | |
3adc28d8 | 7472 | goto unlock; |
1da177e4 | 7473 | |
c02c0aeb N |
7474 | case SET_BITMAP_FILE: |
7475 | err = set_bitmap_file(mddev, (int)arg); | |
3adc28d8 | 7476 | goto unlock; |
32a7627c | 7477 | |
c02c0aeb N |
7478 | default: |
7479 | err = -EINVAL; | |
3adc28d8 | 7480 | goto unlock; |
1da177e4 LT |
7481 | } |
7482 | ||
3adc28d8 | 7483 | unlock: |
d3374825 N |
7484 | if (mddev->hold_active == UNTIL_IOCTL && |
7485 | err != -EINVAL) | |
7486 | mddev->hold_active = 0; | |
1da177e4 | 7487 | mddev_unlock(mddev); |
3adc28d8 | 7488 | out: |
065e519e N |
7489 | if(did_set_md_closing) |
7490 | clear_bit(MD_CLOSING, &mddev->flags); | |
1da177e4 LT |
7491 | return err; |
7492 | } | |
aa98aa31 AB |
7493 | #ifdef CONFIG_COMPAT |
7494 | static int md_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
7495 | unsigned int cmd, unsigned long arg) | |
7496 | { | |
7497 | switch (cmd) { | |
7498 | case HOT_REMOVE_DISK: | |
7499 | case HOT_ADD_DISK: | |
7500 | case SET_DISK_FAULTY: | |
7501 | case SET_BITMAP_FILE: | |
7502 | /* These take in integer arg, do not convert */ | |
7503 | break; | |
7504 | default: | |
7505 | arg = (unsigned long)compat_ptr(arg); | |
7506 | break; | |
7507 | } | |
7508 | ||
7509 | return md_ioctl(bdev, mode, cmd, arg); | |
7510 | } | |
7511 | #endif /* CONFIG_COMPAT */ | |
1da177e4 | 7512 | |
a39907fa | 7513 | static int md_open(struct block_device *bdev, fmode_t mode) |
1da177e4 LT |
7514 | { |
7515 | /* | |
7516 | * Succeed if we can lock the mddev, which confirms that | |
7517 | * it isn't being stopped right now. | |
7518 | */ | |
fd01b88c | 7519 | struct mddev *mddev = mddev_find(bdev->bd_dev); |
1da177e4 LT |
7520 | int err; |
7521 | ||
0c098220 YL |
7522 | if (!mddev) |
7523 | return -ENODEV; | |
7524 | ||
d3374825 N |
7525 | if (mddev->gendisk != bdev->bd_disk) { |
7526 | /* we are racing with mddev_put which is discarding this | |
7527 | * bd_disk. | |
7528 | */ | |
7529 | mddev_put(mddev); | |
7530 | /* Wait until bdev->bd_disk is definitely gone */ | |
e804ac78 | 7531 | flush_workqueue(md_misc_wq); |
d3374825 N |
7532 | /* Then retry the open from the top */ |
7533 | return -ERESTARTSYS; | |
7534 | } | |
7535 | BUG_ON(mddev != bdev->bd_disk->private_data); | |
7536 | ||
c8c00a69 | 7537 | if ((err = mutex_lock_interruptible(&mddev->open_mutex))) |
1da177e4 LT |
7538 | goto out; |
7539 | ||
af8d8e6f GJ |
7540 | if (test_bit(MD_CLOSING, &mddev->flags)) { |
7541 | mutex_unlock(&mddev->open_mutex); | |
e2342ca8 N |
7542 | err = -ENODEV; |
7543 | goto out; | |
af8d8e6f GJ |
7544 | } |
7545 | ||
1da177e4 | 7546 | err = 0; |
f2ea68cf | 7547 | atomic_inc(&mddev->openers); |
c8c00a69 | 7548 | mutex_unlock(&mddev->open_mutex); |
1da177e4 | 7549 | |
f0b4f7e2 | 7550 | check_disk_change(bdev); |
1da177e4 | 7551 | out: |
e2342ca8 N |
7552 | if (err) |
7553 | mddev_put(mddev); | |
1da177e4 LT |
7554 | return err; |
7555 | } | |
7556 | ||
db2a144b | 7557 | static void md_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 7558 | { |
f72ffdd6 | 7559 | struct mddev *mddev = disk->private_data; |
1da177e4 | 7560 | |
52e5f9d1 | 7561 | BUG_ON(!mddev); |
f2ea68cf | 7562 | atomic_dec(&mddev->openers); |
1da177e4 | 7563 | mddev_put(mddev); |
1da177e4 | 7564 | } |
f0b4f7e2 N |
7565 | |
7566 | static int md_media_changed(struct gendisk *disk) | |
7567 | { | |
fd01b88c | 7568 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7569 | |
7570 | return mddev->changed; | |
7571 | } | |
7572 | ||
7573 | static int md_revalidate(struct gendisk *disk) | |
7574 | { | |
fd01b88c | 7575 | struct mddev *mddev = disk->private_data; |
f0b4f7e2 N |
7576 | |
7577 | mddev->changed = 0; | |
7578 | return 0; | |
7579 | } | |
83d5cde4 | 7580 | static const struct block_device_operations md_fops = |
1da177e4 LT |
7581 | { |
7582 | .owner = THIS_MODULE, | |
a39907fa AV |
7583 | .open = md_open, |
7584 | .release = md_release, | |
b492b852 | 7585 | .ioctl = md_ioctl, |
aa98aa31 AB |
7586 | #ifdef CONFIG_COMPAT |
7587 | .compat_ioctl = md_compat_ioctl, | |
7588 | #endif | |
a885c8c4 | 7589 | .getgeo = md_getgeo, |
f0b4f7e2 N |
7590 | .media_changed = md_media_changed, |
7591 | .revalidate_disk= md_revalidate, | |
1da177e4 LT |
7592 | }; |
7593 | ||
f72ffdd6 | 7594 | static int md_thread(void *arg) |
1da177e4 | 7595 | { |
2b8bf345 | 7596 | struct md_thread *thread = arg; |
1da177e4 | 7597 | |
1da177e4 LT |
7598 | /* |
7599 | * md_thread is a 'system-thread', it's priority should be very | |
7600 | * high. We avoid resource deadlocks individually in each | |
7601 | * raid personality. (RAID5 does preallocation) We also use RR and | |
7602 | * the very same RT priority as kswapd, thus we will never get | |
7603 | * into a priority inversion deadlock. | |
7604 | * | |
7605 | * we definitely have to have equal or higher priority than | |
7606 | * bdflush, otherwise bdflush will deadlock if there are too | |
7607 | * many dirty RAID5 blocks. | |
7608 | */ | |
1da177e4 | 7609 | |
6985c43f | 7610 | allow_signal(SIGKILL); |
a6fb0934 | 7611 | while (!kthread_should_stop()) { |
1da177e4 | 7612 | |
93588e22 N |
7613 | /* We need to wait INTERRUPTIBLE so that |
7614 | * we don't add to the load-average. | |
7615 | * That means we need to be sure no signals are | |
7616 | * pending | |
7617 | */ | |
7618 | if (signal_pending(current)) | |
7619 | flush_signals(current); | |
7620 | ||
7621 | wait_event_interruptible_timeout | |
7622 | (thread->wqueue, | |
7623 | test_bit(THREAD_WAKEUP, &thread->flags) | |
ce1ccd07 | 7624 | || kthread_should_stop() || kthread_should_park(), |
93588e22 | 7625 | thread->timeout); |
1da177e4 | 7626 | |
6c987910 | 7627 | clear_bit(THREAD_WAKEUP, &thread->flags); |
ce1ccd07 SL |
7628 | if (kthread_should_park()) |
7629 | kthread_parkme(); | |
6c987910 | 7630 | if (!kthread_should_stop()) |
4ed8731d | 7631 | thread->run(thread); |
1da177e4 | 7632 | } |
a6fb0934 | 7633 | |
1da177e4 LT |
7634 | return 0; |
7635 | } | |
7636 | ||
2b8bf345 | 7637 | void md_wakeup_thread(struct md_thread *thread) |
1da177e4 LT |
7638 | { |
7639 | if (thread) { | |
36a4e1fe | 7640 | pr_debug("md: waking up MD thread %s.\n", thread->tsk->comm); |
d1d90147 GJ |
7641 | set_bit(THREAD_WAKEUP, &thread->flags); |
7642 | wake_up(&thread->wqueue); | |
1da177e4 LT |
7643 | } |
7644 | } | |
6c144d31 | 7645 | EXPORT_SYMBOL(md_wakeup_thread); |
1da177e4 | 7646 | |
4ed8731d SL |
7647 | struct md_thread *md_register_thread(void (*run) (struct md_thread *), |
7648 | struct mddev *mddev, const char *name) | |
1da177e4 | 7649 | { |
2b8bf345 | 7650 | struct md_thread *thread; |
1da177e4 | 7651 | |
2b8bf345 | 7652 | thread = kzalloc(sizeof(struct md_thread), GFP_KERNEL); |
1da177e4 LT |
7653 | if (!thread) |
7654 | return NULL; | |
7655 | ||
1da177e4 LT |
7656 | init_waitqueue_head(&thread->wqueue); |
7657 | ||
1da177e4 LT |
7658 | thread->run = run; |
7659 | thread->mddev = mddev; | |
32a7627c | 7660 | thread->timeout = MAX_SCHEDULE_TIMEOUT; |
0da3c619 N |
7661 | thread->tsk = kthread_run(md_thread, thread, |
7662 | "%s_%s", | |
7663 | mdname(thread->mddev), | |
0232605d | 7664 | name); |
a6fb0934 | 7665 | if (IS_ERR(thread->tsk)) { |
1da177e4 LT |
7666 | kfree(thread); |
7667 | return NULL; | |
7668 | } | |
1da177e4 LT |
7669 | return thread; |
7670 | } | |
6c144d31 | 7671 | EXPORT_SYMBOL(md_register_thread); |
1da177e4 | 7672 | |
2b8bf345 | 7673 | void md_unregister_thread(struct md_thread **threadp) |
1da177e4 | 7674 | { |
2b8bf345 | 7675 | struct md_thread *thread = *threadp; |
e0cf8f04 N |
7676 | if (!thread) |
7677 | return; | |
36a4e1fe | 7678 | pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); |
01f96c0a N |
7679 | /* Locking ensures that mddev_unlock does not wake_up a |
7680 | * non-existent thread | |
7681 | */ | |
7682 | spin_lock(&pers_lock); | |
7683 | *threadp = NULL; | |
7684 | spin_unlock(&pers_lock); | |
a6fb0934 N |
7685 | |
7686 | kthread_stop(thread->tsk); | |
1da177e4 LT |
7687 | kfree(thread); |
7688 | } | |
6c144d31 | 7689 | EXPORT_SYMBOL(md_unregister_thread); |
1da177e4 | 7690 | |
fd01b88c | 7691 | void md_error(struct mddev *mddev, struct md_rdev *rdev) |
1da177e4 | 7692 | { |
b2d444d7 | 7693 | if (!rdev || test_bit(Faulty, &rdev->flags)) |
1da177e4 | 7694 | return; |
6bfe0b49 | 7695 | |
de393cde | 7696 | if (!mddev->pers || !mddev->pers->error_handler) |
1da177e4 LT |
7697 | return; |
7698 | mddev->pers->error_handler(mddev,rdev); | |
72a23c21 NB |
7699 | if (mddev->degraded) |
7700 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); | |
00bcb4ac | 7701 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
1da177e4 LT |
7702 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
7703 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
7704 | md_wakeup_thread(mddev->thread); | |
768a418d | 7705 | if (mddev->event_work.func) |
e804ac78 | 7706 | queue_work(md_misc_wq, &mddev->event_work); |
bb9ef716 | 7707 | md_new_event(mddev); |
1da177e4 | 7708 | } |
6c144d31 | 7709 | EXPORT_SYMBOL(md_error); |
1da177e4 LT |
7710 | |
7711 | /* seq_file implementation /proc/mdstat */ | |
7712 | ||
7713 | static void status_unused(struct seq_file *seq) | |
7714 | { | |
7715 | int i = 0; | |
3cb03002 | 7716 | struct md_rdev *rdev; |
1da177e4 LT |
7717 | |
7718 | seq_printf(seq, "unused devices: "); | |
7719 | ||
159ec1fc | 7720 | list_for_each_entry(rdev, &pending_raid_disks, same_set) { |
1da177e4 LT |
7721 | char b[BDEVNAME_SIZE]; |
7722 | i++; | |
7723 | seq_printf(seq, "%s ", | |
7724 | bdevname(rdev->bdev,b)); | |
7725 | } | |
7726 | if (!i) | |
7727 | seq_printf(seq, "<none>"); | |
7728 | ||
7729 | seq_printf(seq, "\n"); | |
7730 | } | |
7731 | ||
f7851be7 | 7732 | static int status_resync(struct seq_file *seq, struct mddev *mddev) |
1da177e4 | 7733 | { |
dd71cf6b | 7734 | sector_t max_sectors, resync, res; |
9642fa73 MT |
7735 | unsigned long dt, db = 0; |
7736 | sector_t rt, curr_mark_cnt, resync_mark_cnt; | |
7737 | int scale, recovery_active; | |
4588b42e | 7738 | unsigned int per_milli; |
1da177e4 | 7739 | |
c804cdec N |
7740 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
7741 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
dd71cf6b | 7742 | max_sectors = mddev->resync_max_sectors; |
1da177e4 | 7743 | else |
dd71cf6b | 7744 | max_sectors = mddev->dev_sectors; |
1da177e4 | 7745 | |
f7851be7 N |
7746 | resync = mddev->curr_resync; |
7747 | if (resync <= 3) { | |
7748 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) | |
7749 | /* Still cleaning up */ | |
7750 | resync = max_sectors; | |
d2e2ec82 ND |
7751 | } else if (resync > max_sectors) |
7752 | resync = max_sectors; | |
7753 | else | |
f7851be7 N |
7754 | resync -= atomic_read(&mddev->recovery_active); |
7755 | ||
7756 | if (resync == 0) { | |
0357ba27 GJ |
7757 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) { |
7758 | struct md_rdev *rdev; | |
7759 | ||
7760 | rdev_for_each(rdev, mddev) | |
7761 | if (rdev->raid_disk >= 0 && | |
7762 | !test_bit(Faulty, &rdev->flags) && | |
7763 | rdev->recovery_offset != MaxSector && | |
7764 | rdev->recovery_offset) { | |
7765 | seq_printf(seq, "\trecover=REMOTE"); | |
7766 | return 1; | |
7767 | } | |
7768 | if (mddev->reshape_position != MaxSector) | |
7769 | seq_printf(seq, "\treshape=REMOTE"); | |
7770 | else | |
7771 | seq_printf(seq, "\tresync=REMOTE"); | |
7772 | return 1; | |
7773 | } | |
f7851be7 N |
7774 | if (mddev->recovery_cp < MaxSector) { |
7775 | seq_printf(seq, "\tresync=PENDING"); | |
7776 | return 1; | |
7777 | } | |
7778 | return 0; | |
7779 | } | |
7780 | if (resync < 3) { | |
7781 | seq_printf(seq, "\tresync=DELAYED"); | |
7782 | return 1; | |
7783 | } | |
7784 | ||
403df478 | 7785 | WARN_ON(max_sectors == 0); |
4588b42e | 7786 | /* Pick 'scale' such that (resync>>scale)*1000 will fit |
dd71cf6b | 7787 | * in a sector_t, and (max_sectors>>scale) will fit in a |
4588b42e N |
7788 | * u32, as those are the requirements for sector_div. |
7789 | * Thus 'scale' must be at least 10 | |
7790 | */ | |
7791 | scale = 10; | |
7792 | if (sizeof(sector_t) > sizeof(unsigned long)) { | |
dd71cf6b | 7793 | while ( max_sectors/2 > (1ULL<<(scale+32))) |
4588b42e N |
7794 | scale++; |
7795 | } | |
7796 | res = (resync>>scale)*1000; | |
dd71cf6b | 7797 | sector_div(res, (u32)((max_sectors>>scale)+1)); |
4588b42e N |
7798 | |
7799 | per_milli = res; | |
1da177e4 | 7800 | { |
4588b42e | 7801 | int i, x = per_milli/50, y = 20-x; |
1da177e4 LT |
7802 | seq_printf(seq, "["); |
7803 | for (i = 0; i < x; i++) | |
7804 | seq_printf(seq, "="); | |
7805 | seq_printf(seq, ">"); | |
7806 | for (i = 0; i < y; i++) | |
7807 | seq_printf(seq, "."); | |
7808 | seq_printf(seq, "] "); | |
7809 | } | |
4588b42e | 7810 | seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", |
ccfcc3c1 N |
7811 | (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? |
7812 | "reshape" : | |
61df9d91 N |
7813 | (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? |
7814 | "check" : | |
7815 | (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? | |
7816 | "resync" : "recovery"))), | |
7817 | per_milli/10, per_milli % 10, | |
dd71cf6b N |
7818 | (unsigned long long) resync/2, |
7819 | (unsigned long long) max_sectors/2); | |
1da177e4 LT |
7820 | |
7821 | /* | |
1da177e4 LT |
7822 | * dt: time from mark until now |
7823 | * db: blocks written from mark until now | |
7824 | * rt: remaining time | |
dd71cf6b | 7825 | * |
9642fa73 MT |
7826 | * rt is a sector_t, which is always 64bit now. We are keeping |
7827 | * the original algorithm, but it is not really necessary. | |
7828 | * | |
7829 | * Original algorithm: | |
7830 | * So we divide before multiply in case it is 32bit and close | |
7831 | * to the limit. | |
7832 | * We scale the divisor (db) by 32 to avoid losing precision | |
7833 | * near the end of resync when the number of remaining sectors | |
7834 | * is close to 'db'. | |
7835 | * We then divide rt by 32 after multiplying by db to compensate. | |
7836 | * The '+1' avoids division by zero if db is very small. | |
1da177e4 LT |
7837 | */ |
7838 | dt = ((jiffies - mddev->resync_mark) / HZ); | |
7839 | if (!dt) dt++; | |
9642fa73 MT |
7840 | |
7841 | curr_mark_cnt = mddev->curr_mark_cnt; | |
7842 | recovery_active = atomic_read(&mddev->recovery_active); | |
7843 | resync_mark_cnt = mddev->resync_mark_cnt; | |
7844 | ||
7845 | if (curr_mark_cnt >= (recovery_active + resync_mark_cnt)) | |
7846 | db = curr_mark_cnt - (recovery_active + resync_mark_cnt); | |
1da177e4 | 7847 | |
dd71cf6b | 7848 | rt = max_sectors - resync; /* number of remaining sectors */ |
9642fa73 | 7849 | rt = div64_u64(rt, db/32+1); |
dd71cf6b N |
7850 | rt *= dt; |
7851 | rt >>= 5; | |
7852 | ||
7853 | seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60, | |
7854 | ((unsigned long)rt % 60)/6); | |
1da177e4 | 7855 | |
ff4e8d9a | 7856 | seq_printf(seq, " speed=%ldK/sec", db/2/dt); |
f7851be7 | 7857 | return 1; |
1da177e4 LT |
7858 | } |
7859 | ||
7860 | static void *md_seq_start(struct seq_file *seq, loff_t *pos) | |
7861 | { | |
7862 | struct list_head *tmp; | |
7863 | loff_t l = *pos; | |
fd01b88c | 7864 | struct mddev *mddev; |
1da177e4 LT |
7865 | |
7866 | if (l >= 0x10000) | |
7867 | return NULL; | |
7868 | if (!l--) | |
7869 | /* header */ | |
7870 | return (void*)1; | |
7871 | ||
7872 | spin_lock(&all_mddevs_lock); | |
7873 | list_for_each(tmp,&all_mddevs) | |
7874 | if (!l--) { | |
fd01b88c | 7875 | mddev = list_entry(tmp, struct mddev, all_mddevs); |
1da177e4 LT |
7876 | mddev_get(mddev); |
7877 | spin_unlock(&all_mddevs_lock); | |
7878 | return mddev; | |
7879 | } | |
7880 | spin_unlock(&all_mddevs_lock); | |
7881 | if (!l--) | |
7882 | return (void*)2;/* tail */ | |
7883 | return NULL; | |
7884 | } | |
7885 | ||
7886 | static void *md_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
7887 | { | |
7888 | struct list_head *tmp; | |
fd01b88c | 7889 | struct mddev *next_mddev, *mddev = v; |
f72ffdd6 | 7890 | |
1da177e4 LT |
7891 | ++*pos; |
7892 | if (v == (void*)2) | |
7893 | return NULL; | |
7894 | ||
7895 | spin_lock(&all_mddevs_lock); | |
7896 | if (v == (void*)1) | |
7897 | tmp = all_mddevs.next; | |
7898 | else | |
7899 | tmp = mddev->all_mddevs.next; | |
7900 | if (tmp != &all_mddevs) | |
fd01b88c | 7901 | next_mddev = mddev_get(list_entry(tmp,struct mddev,all_mddevs)); |
1da177e4 LT |
7902 | else { |
7903 | next_mddev = (void*)2; | |
7904 | *pos = 0x10000; | |
f72ffdd6 | 7905 | } |
1da177e4 LT |
7906 | spin_unlock(&all_mddevs_lock); |
7907 | ||
7908 | if (v != (void*)1) | |
7909 | mddev_put(mddev); | |
7910 | return next_mddev; | |
7911 | ||
7912 | } | |
7913 | ||
7914 | static void md_seq_stop(struct seq_file *seq, void *v) | |
7915 | { | |
fd01b88c | 7916 | struct mddev *mddev = v; |
1da177e4 LT |
7917 | |
7918 | if (mddev && v != (void*)1 && v != (void*)2) | |
7919 | mddev_put(mddev); | |
7920 | } | |
7921 | ||
7922 | static int md_seq_show(struct seq_file *seq, void *v) | |
7923 | { | |
fd01b88c | 7924 | struct mddev *mddev = v; |
dd8ac336 | 7925 | sector_t sectors; |
3cb03002 | 7926 | struct md_rdev *rdev; |
1da177e4 LT |
7927 | |
7928 | if (v == (void*)1) { | |
84fc4b56 | 7929 | struct md_personality *pers; |
1da177e4 LT |
7930 | seq_printf(seq, "Personalities : "); |
7931 | spin_lock(&pers_lock); | |
2604b703 N |
7932 | list_for_each_entry(pers, &pers_list, list) |
7933 | seq_printf(seq, "[%s] ", pers->name); | |
1da177e4 LT |
7934 | |
7935 | spin_unlock(&pers_lock); | |
7936 | seq_printf(seq, "\n"); | |
f1514638 | 7937 | seq->poll_event = atomic_read(&md_event_count); |
1da177e4 LT |
7938 | return 0; |
7939 | } | |
7940 | if (v == (void*)2) { | |
7941 | status_unused(seq); | |
7942 | return 0; | |
7943 | } | |
7944 | ||
36d091f4 | 7945 | spin_lock(&mddev->lock); |
1da177e4 LT |
7946 | if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { |
7947 | seq_printf(seq, "%s : %sactive", mdname(mddev), | |
7948 | mddev->pers ? "" : "in"); | |
7949 | if (mddev->pers) { | |
f91de92e | 7950 | if (mddev->ro==1) |
1da177e4 | 7951 | seq_printf(seq, " (read-only)"); |
f91de92e | 7952 | if (mddev->ro==2) |
52720ae7 | 7953 | seq_printf(seq, " (auto-read-only)"); |
1da177e4 LT |
7954 | seq_printf(seq, " %s", mddev->pers->name); |
7955 | } | |
7956 | ||
dd8ac336 | 7957 | sectors = 0; |
f97fcad3 N |
7958 | rcu_read_lock(); |
7959 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 LT |
7960 | char b[BDEVNAME_SIZE]; |
7961 | seq_printf(seq, " %s[%d]", | |
7962 | bdevname(rdev->bdev,b), rdev->desc_nr); | |
8ddf9efe N |
7963 | if (test_bit(WriteMostly, &rdev->flags)) |
7964 | seq_printf(seq, "(W)"); | |
9efdca16 SL |
7965 | if (test_bit(Journal, &rdev->flags)) |
7966 | seq_printf(seq, "(J)"); | |
b2d444d7 | 7967 | if (test_bit(Faulty, &rdev->flags)) { |
1da177e4 LT |
7968 | seq_printf(seq, "(F)"); |
7969 | continue; | |
2d78f8c4 N |
7970 | } |
7971 | if (rdev->raid_disk < 0) | |
b325a32e | 7972 | seq_printf(seq, "(S)"); /* spare */ |
2d78f8c4 N |
7973 | if (test_bit(Replacement, &rdev->flags)) |
7974 | seq_printf(seq, "(R)"); | |
dd8ac336 | 7975 | sectors += rdev->sectors; |
1da177e4 | 7976 | } |
f97fcad3 | 7977 | rcu_read_unlock(); |
1da177e4 LT |
7978 | |
7979 | if (!list_empty(&mddev->disks)) { | |
7980 | if (mddev->pers) | |
7981 | seq_printf(seq, "\n %llu blocks", | |
f233ea5c AN |
7982 | (unsigned long long) |
7983 | mddev->array_sectors / 2); | |
1da177e4 LT |
7984 | else |
7985 | seq_printf(seq, "\n %llu blocks", | |
dd8ac336 | 7986 | (unsigned long long)sectors / 2); |
1da177e4 | 7987 | } |
1cd6bf19 N |
7988 | if (mddev->persistent) { |
7989 | if (mddev->major_version != 0 || | |
7990 | mddev->minor_version != 90) { | |
7991 | seq_printf(seq," super %d.%d", | |
7992 | mddev->major_version, | |
7993 | mddev->minor_version); | |
7994 | } | |
e691063a N |
7995 | } else if (mddev->external) |
7996 | seq_printf(seq, " super external:%s", | |
7997 | mddev->metadata_type); | |
7998 | else | |
1cd6bf19 | 7999 | seq_printf(seq, " super non-persistent"); |
1da177e4 LT |
8000 | |
8001 | if (mddev->pers) { | |
d710e138 | 8002 | mddev->pers->status(seq, mddev); |
f72ffdd6 | 8003 | seq_printf(seq, "\n "); |
8e1b39d6 | 8004 | if (mddev->pers->sync_request) { |
f7851be7 | 8005 | if (status_resync(seq, mddev)) |
8e1b39d6 | 8006 | seq_printf(seq, "\n "); |
8e1b39d6 | 8007 | } |
32a7627c N |
8008 | } else |
8009 | seq_printf(seq, "\n "); | |
8010 | ||
e64e4018 | 8011 | md_bitmap_status(seq, mddev->bitmap); |
1da177e4 LT |
8012 | |
8013 | seq_printf(seq, "\n"); | |
8014 | } | |
36d091f4 | 8015 | spin_unlock(&mddev->lock); |
f72ffdd6 | 8016 | |
1da177e4 LT |
8017 | return 0; |
8018 | } | |
8019 | ||
110518bc | 8020 | static const struct seq_operations md_seq_ops = { |
1da177e4 LT |
8021 | .start = md_seq_start, |
8022 | .next = md_seq_next, | |
8023 | .stop = md_seq_stop, | |
8024 | .show = md_seq_show, | |
8025 | }; | |
8026 | ||
8027 | static int md_seq_open(struct inode *inode, struct file *file) | |
8028 | { | |
f1514638 | 8029 | struct seq_file *seq; |
1da177e4 LT |
8030 | int error; |
8031 | ||
8032 | error = seq_open(file, &md_seq_ops); | |
d7603b7e | 8033 | if (error) |
f1514638 KS |
8034 | return error; |
8035 | ||
8036 | seq = file->private_data; | |
8037 | seq->poll_event = atomic_read(&md_event_count); | |
1da177e4 LT |
8038 | return error; |
8039 | } | |
8040 | ||
e2f23b60 | 8041 | static int md_unloading; |
afc9a42b | 8042 | static __poll_t mdstat_poll(struct file *filp, poll_table *wait) |
d7603b7e | 8043 | { |
f1514638 | 8044 | struct seq_file *seq = filp->private_data; |
afc9a42b | 8045 | __poll_t mask; |
d7603b7e | 8046 | |
e2f23b60 | 8047 | if (md_unloading) |
a9a08845 | 8048 | return EPOLLIN|EPOLLRDNORM|EPOLLERR|EPOLLPRI; |
d7603b7e N |
8049 | poll_wait(filp, &md_event_waiters, wait); |
8050 | ||
8051 | /* always allow read */ | |
a9a08845 | 8052 | mask = EPOLLIN | EPOLLRDNORM; |
d7603b7e | 8053 | |
f1514638 | 8054 | if (seq->poll_event != atomic_read(&md_event_count)) |
a9a08845 | 8055 | mask |= EPOLLERR | EPOLLPRI; |
d7603b7e N |
8056 | return mask; |
8057 | } | |
8058 | ||
fa027c2a | 8059 | static const struct file_operations md_seq_fops = { |
e24650c2 | 8060 | .owner = THIS_MODULE, |
1da177e4 LT |
8061 | .open = md_seq_open, |
8062 | .read = seq_read, | |
8063 | .llseek = seq_lseek, | |
26e13043 | 8064 | .release = seq_release, |
d7603b7e | 8065 | .poll = mdstat_poll, |
1da177e4 LT |
8066 | }; |
8067 | ||
84fc4b56 | 8068 | int register_md_personality(struct md_personality *p) |
1da177e4 | 8069 | { |
9d48739e N |
8070 | pr_debug("md: %s personality registered for level %d\n", |
8071 | p->name, p->level); | |
1da177e4 | 8072 | spin_lock(&pers_lock); |
2604b703 | 8073 | list_add_tail(&p->list, &pers_list); |
1da177e4 LT |
8074 | spin_unlock(&pers_lock); |
8075 | return 0; | |
8076 | } | |
6c144d31 | 8077 | EXPORT_SYMBOL(register_md_personality); |
1da177e4 | 8078 | |
84fc4b56 | 8079 | int unregister_md_personality(struct md_personality *p) |
1da177e4 | 8080 | { |
9d48739e | 8081 | pr_debug("md: %s personality unregistered\n", p->name); |
1da177e4 | 8082 | spin_lock(&pers_lock); |
2604b703 | 8083 | list_del_init(&p->list); |
1da177e4 LT |
8084 | spin_unlock(&pers_lock); |
8085 | return 0; | |
8086 | } | |
6c144d31 | 8087 | EXPORT_SYMBOL(unregister_md_personality); |
1da177e4 | 8088 | |
6022e75b N |
8089 | int register_md_cluster_operations(struct md_cluster_operations *ops, |
8090 | struct module *module) | |
edb39c9d | 8091 | { |
6022e75b | 8092 | int ret = 0; |
edb39c9d | 8093 | spin_lock(&pers_lock); |
6022e75b N |
8094 | if (md_cluster_ops != NULL) |
8095 | ret = -EALREADY; | |
8096 | else { | |
8097 | md_cluster_ops = ops; | |
8098 | md_cluster_mod = module; | |
8099 | } | |
edb39c9d | 8100 | spin_unlock(&pers_lock); |
6022e75b | 8101 | return ret; |
edb39c9d GR |
8102 | } |
8103 | EXPORT_SYMBOL(register_md_cluster_operations); | |
8104 | ||
8105 | int unregister_md_cluster_operations(void) | |
8106 | { | |
8107 | spin_lock(&pers_lock); | |
8108 | md_cluster_ops = NULL; | |
8109 | spin_unlock(&pers_lock); | |
8110 | return 0; | |
8111 | } | |
8112 | EXPORT_SYMBOL(unregister_md_cluster_operations); | |
8113 | ||
8114 | int md_setup_cluster(struct mddev *mddev, int nodes) | |
8115 | { | |
47a7b0d8 GJ |
8116 | if (!md_cluster_ops) |
8117 | request_module("md-cluster"); | |
edb39c9d | 8118 | spin_lock(&pers_lock); |
47a7b0d8 | 8119 | /* ensure module won't be unloaded */ |
edb39c9d | 8120 | if (!md_cluster_ops || !try_module_get(md_cluster_mod)) { |
9d48739e | 8121 | pr_warn("can't find md-cluster module or get it's reference.\n"); |
edb39c9d GR |
8122 | spin_unlock(&pers_lock); |
8123 | return -ENOENT; | |
8124 | } | |
8125 | spin_unlock(&pers_lock); | |
8126 | ||
cf921cc1 | 8127 | return md_cluster_ops->join(mddev, nodes); |
edb39c9d GR |
8128 | } |
8129 | ||
8130 | void md_cluster_stop(struct mddev *mddev) | |
8131 | { | |
c4ce867f GR |
8132 | if (!md_cluster_ops) |
8133 | return; | |
edb39c9d GR |
8134 | md_cluster_ops->leave(mddev); |
8135 | module_put(md_cluster_mod); | |
8136 | } | |
8137 | ||
fd01b88c | 8138 | static int is_mddev_idle(struct mddev *mddev, int init) |
1da177e4 | 8139 | { |
f72ffdd6 | 8140 | struct md_rdev *rdev; |
1da177e4 | 8141 | int idle; |
eea1bf38 | 8142 | int curr_events; |
1da177e4 LT |
8143 | |
8144 | idle = 1; | |
4b80991c N |
8145 | rcu_read_lock(); |
8146 | rdev_for_each_rcu(rdev, mddev) { | |
1da177e4 | 8147 | struct gendisk *disk = rdev->bdev->bd_contains->bd_disk; |
59767fbd | 8148 | curr_events = (int)part_stat_read_accum(&disk->part0, sectors) - |
eea1bf38 | 8149 | atomic_read(&disk->sync_io); |
713f6ab1 N |
8150 | /* sync IO will cause sync_io to increase before the disk_stats |
8151 | * as sync_io is counted when a request starts, and | |
8152 | * disk_stats is counted when it completes. | |
8153 | * So resync activity will cause curr_events to be smaller than | |
8154 | * when there was no such activity. | |
8155 | * non-sync IO will cause disk_stat to increase without | |
8156 | * increasing sync_io so curr_events will (eventually) | |
8157 | * be larger than it was before. Once it becomes | |
8158 | * substantially larger, the test below will cause | |
8159 | * the array to appear non-idle, and resync will slow | |
8160 | * down. | |
8161 | * If there is a lot of outstanding resync activity when | |
8162 | * we set last_event to curr_events, then all that activity | |
8163 | * completing might cause the array to appear non-idle | |
8164 | * and resync will be slowed down even though there might | |
8165 | * not have been non-resync activity. This will only | |
8166 | * happen once though. 'last_events' will soon reflect | |
8167 | * the state where there is little or no outstanding | |
8168 | * resync requests, and further resync activity will | |
8169 | * always make curr_events less than last_events. | |
c0e48521 | 8170 | * |
1da177e4 | 8171 | */ |
eea1bf38 | 8172 | if (init || curr_events - rdev->last_events > 64) { |
1da177e4 LT |
8173 | rdev->last_events = curr_events; |
8174 | idle = 0; | |
8175 | } | |
8176 | } | |
4b80991c | 8177 | rcu_read_unlock(); |
1da177e4 LT |
8178 | return idle; |
8179 | } | |
8180 | ||
fd01b88c | 8181 | void md_done_sync(struct mddev *mddev, int blocks, int ok) |
1da177e4 LT |
8182 | { |
8183 | /* another "blocks" (512byte) blocks have been synced */ | |
8184 | atomic_sub(blocks, &mddev->recovery_active); | |
8185 | wake_up(&mddev->recovery_wait); | |
8186 | if (!ok) { | |
dfc70645 | 8187 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
0a19caab | 8188 | set_bit(MD_RECOVERY_ERROR, &mddev->recovery); |
1da177e4 LT |
8189 | md_wakeup_thread(mddev->thread); |
8190 | // stop recovery, signal do_sync .... | |
8191 | } | |
8192 | } | |
6c144d31 | 8193 | EXPORT_SYMBOL(md_done_sync); |
1da177e4 | 8194 | |
06d91a5f N |
8195 | /* md_write_start(mddev, bi) |
8196 | * If we need to update some array metadata (e.g. 'active' flag | |
3d310eb7 N |
8197 | * in superblock) before writing, schedule a superblock update |
8198 | * and wait for it to complete. | |
cc27b0c7 N |
8199 | * A return value of 'false' means that the write wasn't recorded |
8200 | * and cannot proceed as the array is being suspend. | |
06d91a5f | 8201 | */ |
cc27b0c7 | 8202 | bool md_write_start(struct mddev *mddev, struct bio *bi) |
1da177e4 | 8203 | { |
0fd62b86 | 8204 | int did_change = 0; |
4b6c1060 | 8205 | |
06d91a5f | 8206 | if (bio_data_dir(bi) != WRITE) |
cc27b0c7 | 8207 | return true; |
06d91a5f | 8208 | |
f91de92e N |
8209 | BUG_ON(mddev->ro == 1); |
8210 | if (mddev->ro == 2) { | |
8211 | /* need to switch to read/write */ | |
8212 | mddev->ro = 0; | |
8213 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8214 | md_wakeup_thread(mddev->thread); | |
25156198 | 8215 | md_wakeup_thread(mddev->sync_thread); |
0fd62b86 | 8216 | did_change = 1; |
f91de92e | 8217 | } |
4ad23a97 N |
8218 | rcu_read_lock(); |
8219 | percpu_ref_get(&mddev->writes_pending); | |
55cc39f3 | 8220 | smp_mb(); /* Match smp_mb in set_in_sync() */ |
31a59e34 N |
8221 | if (mddev->safemode == 1) |
8222 | mddev->safemode = 0; | |
4ad23a97 | 8223 | /* sync_checkers is always 0 when writes_pending is in per-cpu mode */ |
81fe48e9 | 8224 | if (mddev->in_sync || mddev->sync_checkers) { |
85572d7c | 8225 | spin_lock(&mddev->lock); |
3d310eb7 N |
8226 | if (mddev->in_sync) { |
8227 | mddev->in_sync = 0; | |
2953079c SL |
8228 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8229 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
3d310eb7 | 8230 | md_wakeup_thread(mddev->thread); |
0fd62b86 | 8231 | did_change = 1; |
3d310eb7 | 8232 | } |
85572d7c | 8233 | spin_unlock(&mddev->lock); |
06d91a5f | 8234 | } |
4ad23a97 | 8235 | rcu_read_unlock(); |
0fd62b86 | 8236 | if (did_change) |
00bcb4ac | 8237 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
4b6c1060 HM |
8238 | if (!mddev->has_superblocks) |
8239 | return true; | |
09a44cc1 | 8240 | wait_event(mddev->sb_wait, |
d47c8ad2 N |
8241 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) || |
8242 | mddev->suspended); | |
cc27b0c7 N |
8243 | if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) { |
8244 | percpu_ref_put(&mddev->writes_pending); | |
8245 | return false; | |
8246 | } | |
8247 | return true; | |
1da177e4 | 8248 | } |
6c144d31 | 8249 | EXPORT_SYMBOL(md_write_start); |
1da177e4 | 8250 | |
49728050 N |
8251 | /* md_write_inc can only be called when md_write_start() has |
8252 | * already been called at least once of the current request. | |
8253 | * It increments the counter and is useful when a single request | |
8254 | * is split into several parts. Each part causes an increment and | |
8255 | * so needs a matching md_write_end(). | |
8256 | * Unlike md_write_start(), it is safe to call md_write_inc() inside | |
8257 | * a spinlocked region. | |
8258 | */ | |
8259 | void md_write_inc(struct mddev *mddev, struct bio *bi) | |
8260 | { | |
8261 | if (bio_data_dir(bi) != WRITE) | |
8262 | return; | |
8263 | WARN_ON_ONCE(mddev->in_sync || mddev->ro); | |
4ad23a97 | 8264 | percpu_ref_get(&mddev->writes_pending); |
49728050 N |
8265 | } |
8266 | EXPORT_SYMBOL(md_write_inc); | |
8267 | ||
fd01b88c | 8268 | void md_write_end(struct mddev *mddev) |
1da177e4 | 8269 | { |
4ad23a97 N |
8270 | percpu_ref_put(&mddev->writes_pending); |
8271 | ||
8272 | if (mddev->safemode == 2) | |
8273 | md_wakeup_thread(mddev->thread); | |
8274 | else if (mddev->safemode_delay) | |
8275 | /* The roundup() ensures this only performs locking once | |
8276 | * every ->safemode_delay jiffies | |
8277 | */ | |
8278 | mod_timer(&mddev->safemode_timer, | |
8279 | roundup(jiffies, mddev->safemode_delay) + | |
8280 | mddev->safemode_delay); | |
1da177e4 | 8281 | } |
4ad23a97 | 8282 | |
6c144d31 | 8283 | EXPORT_SYMBOL(md_write_end); |
1da177e4 | 8284 | |
2a2275d6 N |
8285 | /* md_allow_write(mddev) |
8286 | * Calling this ensures that the array is marked 'active' so that writes | |
8287 | * may proceed without blocking. It is important to call this before | |
8288 | * attempting a GFP_KERNEL allocation while holding the mddev lock. | |
8289 | * Must be called with mddev_lock held. | |
8290 | */ | |
2214c260 | 8291 | void md_allow_write(struct mddev *mddev) |
2a2275d6 N |
8292 | { |
8293 | if (!mddev->pers) | |
2214c260 | 8294 | return; |
2a2275d6 | 8295 | if (mddev->ro) |
2214c260 | 8296 | return; |
1a0fd497 | 8297 | if (!mddev->pers->sync_request) |
2214c260 | 8298 | return; |
2a2275d6 | 8299 | |
85572d7c | 8300 | spin_lock(&mddev->lock); |
2a2275d6 N |
8301 | if (mddev->in_sync) { |
8302 | mddev->in_sync = 0; | |
2953079c SL |
8303 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
8304 | set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); | |
2a2275d6 N |
8305 | if (mddev->safemode_delay && |
8306 | mddev->safemode == 0) | |
8307 | mddev->safemode = 1; | |
85572d7c | 8308 | spin_unlock(&mddev->lock); |
2a2275d6 | 8309 | md_update_sb(mddev, 0); |
00bcb4ac | 8310 | sysfs_notify_dirent_safe(mddev->sysfs_state); |
2214c260 AP |
8311 | /* wait for the dirty state to be recorded in the metadata */ |
8312 | wait_event(mddev->sb_wait, | |
2214c260 | 8313 | !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); |
2a2275d6 | 8314 | } else |
85572d7c | 8315 | spin_unlock(&mddev->lock); |
2a2275d6 N |
8316 | } |
8317 | EXPORT_SYMBOL_GPL(md_allow_write); | |
8318 | ||
1da177e4 LT |
8319 | #define SYNC_MARKS 10 |
8320 | #define SYNC_MARK_STEP (3*HZ) | |
54f89341 | 8321 | #define UPDATE_FREQUENCY (5*60*HZ) |
4ed8731d | 8322 | void md_do_sync(struct md_thread *thread) |
1da177e4 | 8323 | { |
4ed8731d | 8324 | struct mddev *mddev = thread->mddev; |
fd01b88c | 8325 | struct mddev *mddev2; |
e5b521ee | 8326 | unsigned int currspeed = 0, window; |
ac7e50a3 | 8327 | sector_t max_sectors,j, io_sectors, recovery_done; |
1da177e4 | 8328 | unsigned long mark[SYNC_MARKS]; |
54f89341 | 8329 | unsigned long update_time; |
1da177e4 LT |
8330 | sector_t mark_cnt[SYNC_MARKS]; |
8331 | int last_mark,m; | |
8332 | struct list_head *tmp; | |
8333 | sector_t last_check; | |
57afd89f | 8334 | int skipped = 0; |
3cb03002 | 8335 | struct md_rdev *rdev; |
c4a39551 | 8336 | char *desc, *action = NULL; |
7c2c57c9 | 8337 | struct blk_plug plug; |
41a9a0dc | 8338 | int ret; |
1da177e4 LT |
8339 | |
8340 | /* just incase thread restarts... */ | |
d5d885fd SL |
8341 | if (test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
8342 | test_bit(MD_RECOVERY_WAIT, &mddev->recovery)) | |
1da177e4 | 8343 | return; |
3991b31e N |
8344 | if (mddev->ro) {/* never try to sync a read-only array */ |
8345 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); | |
5fd6c1dc | 8346 | return; |
3991b31e | 8347 | } |
1da177e4 | 8348 | |
41a9a0dc GJ |
8349 | if (mddev_is_clustered(mddev)) { |
8350 | ret = md_cluster_ops->resync_start(mddev); | |
8351 | if (ret) | |
8352 | goto skip; | |
8353 | ||
bb8bf15b | 8354 | set_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags); |
41a9a0dc GJ |
8355 | if (!(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) || |
8356 | test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) || | |
8357 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) | |
8358 | && ((unsigned long long)mddev->curr_resync_completed | |
8359 | < (unsigned long long)mddev->resync_max_sectors)) | |
8360 | goto skip; | |
8361 | } | |
8362 | ||
61df9d91 | 8363 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
c4a39551 | 8364 | if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |
61df9d91 | 8365 | desc = "data-check"; |
c4a39551 JB |
8366 | action = "check"; |
8367 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
61df9d91 | 8368 | desc = "requested-resync"; |
c4a39551 JB |
8369 | action = "repair"; |
8370 | } else | |
61df9d91 N |
8371 | desc = "resync"; |
8372 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) | |
8373 | desc = "reshape"; | |
8374 | else | |
8375 | desc = "recovery"; | |
8376 | ||
c4a39551 JB |
8377 | mddev->last_sync_action = action ?: desc; |
8378 | ||
1da177e4 LT |
8379 | /* we overload curr_resync somewhat here. |
8380 | * 0 == not engaged in resync at all | |
8381 | * 2 == checking that there is no conflict with another sync | |
8382 | * 1 == like 2, but have yielded to allow conflicting resync to | |
e5b521ee | 8383 | * commence |
1da177e4 LT |
8384 | * other == active in resync - this many blocks |
8385 | * | |
8386 | * Before starting a resync we must have set curr_resync to | |
8387 | * 2, and then checked that every "conflicting" array has curr_resync | |
8388 | * less than ours. When we find one that is the same or higher | |
8389 | * we wait on resync_wait. To avoid deadlock, we reduce curr_resync | |
8390 | * to 1 if we choose to yield (based arbitrarily on address of mddev structure). | |
8391 | * This will mean we have to start checking from the beginning again. | |
8392 | * | |
8393 | */ | |
8394 | ||
8395 | do { | |
c622ca54 | 8396 | int mddev2_minor = -1; |
1da177e4 LT |
8397 | mddev->curr_resync = 2; |
8398 | ||
8399 | try_again: | |
404e4b43 | 8400 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
1da177e4 | 8401 | goto skip; |
29ac4aa3 | 8402 | for_each_mddev(mddev2, tmp) { |
1da177e4 LT |
8403 | if (mddev2 == mddev) |
8404 | continue; | |
90b08710 BS |
8405 | if (!mddev->parallel_resync |
8406 | && mddev2->curr_resync | |
8407 | && match_mddev_units(mddev, mddev2)) { | |
1da177e4 LT |
8408 | DEFINE_WAIT(wq); |
8409 | if (mddev < mddev2 && mddev->curr_resync == 2) { | |
8410 | /* arbitrarily yield */ | |
8411 | mddev->curr_resync = 1; | |
8412 | wake_up(&resync_wait); | |
8413 | } | |
8414 | if (mddev > mddev2 && mddev->curr_resync == 1) | |
8415 | /* no need to wait here, we can wait the next | |
8416 | * time 'round when curr_resync == 2 | |
8417 | */ | |
8418 | continue; | |
9744197c N |
8419 | /* We need to wait 'interruptible' so as not to |
8420 | * contribute to the load average, and not to | |
8421 | * be caught by 'softlockup' | |
8422 | */ | |
8423 | prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE); | |
c91abf5a | 8424 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && |
8712e553 | 8425 | mddev2->curr_resync >= mddev->curr_resync) { |
c622ca54 AP |
8426 | if (mddev2_minor != mddev2->md_minor) { |
8427 | mddev2_minor = mddev2->md_minor; | |
9d48739e N |
8428 | pr_info("md: delaying %s of %s until %s has finished (they share one or more physical units)\n", |
8429 | desc, mdname(mddev), | |
8430 | mdname(mddev2)); | |
c622ca54 | 8431 | } |
1da177e4 | 8432 | mddev_put(mddev2); |
9744197c N |
8433 | if (signal_pending(current)) |
8434 | flush_signals(current); | |
1da177e4 LT |
8435 | schedule(); |
8436 | finish_wait(&resync_wait, &wq); | |
8437 | goto try_again; | |
8438 | } | |
8439 | finish_wait(&resync_wait, &wq); | |
8440 | } | |
8441 | } | |
8442 | } while (mddev->curr_resync < 2); | |
8443 | ||
5fd6c1dc | 8444 | j = 0; |
9d88883e | 8445 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
1da177e4 | 8446 | /* resync follows the size requested by the personality, |
57afd89f | 8447 | * which defaults to physical size, but can be virtual size |
1da177e4 LT |
8448 | */ |
8449 | max_sectors = mddev->resync_max_sectors; | |
7f7583d4 | 8450 | atomic64_set(&mddev->resync_mismatches, 0); |
5fd6c1dc | 8451 | /* we don't use the checkpoint if there's a bitmap */ |
5e96ee65 NB |
8452 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) |
8453 | j = mddev->resync_min; | |
8454 | else if (!mddev->bitmap) | |
5fd6c1dc | 8455 | j = mddev->recovery_cp; |
5e96ee65 | 8456 | |
cb9ee154 | 8457 | } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) { |
c804cdec | 8458 | max_sectors = mddev->resync_max_sectors; |
cb9ee154 GJ |
8459 | /* |
8460 | * If the original node aborts reshaping then we continue the | |
8461 | * reshaping, so set j again to avoid restart reshape from the | |
8462 | * first beginning | |
8463 | */ | |
8464 | if (mddev_is_clustered(mddev) && | |
8465 | mddev->reshape_position != MaxSector) | |
8466 | j = mddev->reshape_position; | |
8467 | } else { | |
1da177e4 | 8468 | /* recovery follows the physical size of devices */ |
58c0fed4 | 8469 | max_sectors = mddev->dev_sectors; |
5fd6c1dc | 8470 | j = MaxSector; |
4e59ca7d | 8471 | rcu_read_lock(); |
dafb20fa | 8472 | rdev_for_each_rcu(rdev, mddev) |
5fd6c1dc | 8473 | if (rdev->raid_disk >= 0 && |
f2076e7d | 8474 | !test_bit(Journal, &rdev->flags) && |
5fd6c1dc N |
8475 | !test_bit(Faulty, &rdev->flags) && |
8476 | !test_bit(In_sync, &rdev->flags) && | |
8477 | rdev->recovery_offset < j) | |
8478 | j = rdev->recovery_offset; | |
4e59ca7d | 8479 | rcu_read_unlock(); |
133d4527 N |
8480 | |
8481 | /* If there is a bitmap, we need to make sure all | |
8482 | * writes that started before we added a spare | |
8483 | * complete before we start doing a recovery. | |
8484 | * Otherwise the write might complete and (via | |
8485 | * bitmap_endwrite) set a bit in the bitmap after the | |
8486 | * recovery has checked that bit and skipped that | |
8487 | * region. | |
8488 | */ | |
8489 | if (mddev->bitmap) { | |
8490 | mddev->pers->quiesce(mddev, 1); | |
8491 | mddev->pers->quiesce(mddev, 0); | |
8492 | } | |
5fd6c1dc | 8493 | } |
1da177e4 | 8494 | |
9d48739e N |
8495 | pr_info("md: %s of RAID array %s\n", desc, mdname(mddev)); |
8496 | pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev)); | |
8497 | pr_debug("md: using maximum available idle IO bandwidth (but not more than %d KB/sec) for %s.\n", | |
8498 | speed_max(mddev), desc); | |
1da177e4 | 8499 | |
eea1bf38 | 8500 | is_mddev_idle(mddev, 1); /* this initializes IO event counters */ |
5fd6c1dc | 8501 | |
57afd89f | 8502 | io_sectors = 0; |
1da177e4 LT |
8503 | for (m = 0; m < SYNC_MARKS; m++) { |
8504 | mark[m] = jiffies; | |
57afd89f | 8505 | mark_cnt[m] = io_sectors; |
1da177e4 LT |
8506 | } |
8507 | last_mark = 0; | |
8508 | mddev->resync_mark = mark[last_mark]; | |
8509 | mddev->resync_mark_cnt = mark_cnt[last_mark]; | |
8510 | ||
8511 | /* | |
8512 | * Tune reconstruction: | |
8513 | */ | |
e5b521ee | 8514 | window = 32 * (PAGE_SIZE / 512); |
9d48739e N |
8515 | pr_debug("md: using %dk window, over a total of %lluk.\n", |
8516 | window/2, (unsigned long long)max_sectors/2); | |
1da177e4 LT |
8517 | |
8518 | atomic_set(&mddev->recovery_active, 0); | |
1da177e4 LT |
8519 | last_check = 0; |
8520 | ||
8521 | if (j>2) { | |
9d48739e N |
8522 | pr_debug("md: resuming %s of %s from checkpoint.\n", |
8523 | desc, mdname(mddev)); | |
1da177e4 | 8524 | mddev->curr_resync = j; |
72f36d59 N |
8525 | } else |
8526 | mddev->curr_resync = 3; /* no longer delayed */ | |
75d3da43 | 8527 | mddev->curr_resync_completed = j; |
72f36d59 N |
8528 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
8529 | md_new_event(mddev); | |
54f89341 | 8530 | update_time = jiffies; |
1da177e4 | 8531 | |
7c2c57c9 | 8532 | blk_start_plug(&plug); |
1da177e4 | 8533 | while (j < max_sectors) { |
57afd89f | 8534 | sector_t sectors; |
1da177e4 | 8535 | |
57afd89f | 8536 | skipped = 0; |
97e4f42d | 8537 | |
7a91ee1f N |
8538 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8539 | ((mddev->curr_resync > mddev->curr_resync_completed && | |
8540 | (mddev->curr_resync - mddev->curr_resync_completed) | |
8541 | > (max_sectors >> 4)) || | |
54f89341 | 8542 | time_after_eq(jiffies, update_time + UPDATE_FREQUENCY) || |
7a91ee1f | 8543 | (j - mddev->curr_resync_completed)*2 |
c5e19d90 N |
8544 | >= mddev->resync_max - mddev->curr_resync_completed || |
8545 | mddev->curr_resync_completed > mddev->resync_max | |
7a91ee1f | 8546 | )) { |
97e4f42d | 8547 | /* time to update curr_resync_completed */ |
97e4f42d N |
8548 | wait_event(mddev->recovery_wait, |
8549 | atomic_read(&mddev->recovery_active) == 0); | |
75d3da43 | 8550 | mddev->curr_resync_completed = j; |
35d78c66 | 8551 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && |
8552 | j > mddev->recovery_cp) | |
8553 | mddev->recovery_cp = j; | |
54f89341 | 8554 | update_time = jiffies; |
2953079c | 8555 | set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags); |
acb180b0 | 8556 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); |
97e4f42d | 8557 | } |
acb180b0 | 8558 | |
c91abf5a N |
8559 | while (j >= mddev->resync_max && |
8560 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
e62e58a5 N |
8561 | /* As this condition is controlled by user-space, |
8562 | * we can block indefinitely, so use '_interruptible' | |
8563 | * to avoid triggering warnings. | |
8564 | */ | |
8565 | flush_signals(current); /* just in case */ | |
8566 | wait_event_interruptible(mddev->recovery_wait, | |
8567 | mddev->resync_max > j | |
c91abf5a N |
8568 | || test_bit(MD_RECOVERY_INTR, |
8569 | &mddev->recovery)); | |
e62e58a5 | 8570 | } |
acb180b0 | 8571 | |
c91abf5a N |
8572 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8573 | break; | |
acb180b0 | 8574 | |
09314799 | 8575 | sectors = mddev->pers->sync_request(mddev, j, &skipped); |
57afd89f | 8576 | if (sectors == 0) { |
dfc70645 | 8577 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
c91abf5a | 8578 | break; |
1da177e4 | 8579 | } |
57afd89f N |
8580 | |
8581 | if (!skipped) { /* actual IO requested */ | |
8582 | io_sectors += sectors; | |
8583 | atomic_add(sectors, &mddev->recovery_active); | |
8584 | } | |
8585 | ||
e875ecea N |
8586 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8587 | break; | |
8588 | ||
1da177e4 | 8589 | j += sectors; |
5ed1df2e N |
8590 | if (j > max_sectors) |
8591 | /* when skipping, extra large numbers can be returned. */ | |
8592 | j = max_sectors; | |
72f36d59 N |
8593 | if (j > 2) |
8594 | mddev->curr_resync = j; | |
ff4e8d9a | 8595 | mddev->curr_mark_cnt = io_sectors; |
d7603b7e | 8596 | if (last_check == 0) |
e875ecea | 8597 | /* this is the earliest that rebuild will be |
d7603b7e N |
8598 | * visible in /proc/mdstat |
8599 | */ | |
8600 | md_new_event(mddev); | |
57afd89f N |
8601 | |
8602 | if (last_check + window > io_sectors || j == max_sectors) | |
1da177e4 LT |
8603 | continue; |
8604 | ||
57afd89f | 8605 | last_check = io_sectors; |
1da177e4 LT |
8606 | repeat: |
8607 | if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) { | |
8608 | /* step marks */ | |
8609 | int next = (last_mark+1) % SYNC_MARKS; | |
8610 | ||
8611 | mddev->resync_mark = mark[next]; | |
8612 | mddev->resync_mark_cnt = mark_cnt[next]; | |
8613 | mark[next] = jiffies; | |
57afd89f | 8614 | mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active); |
1da177e4 LT |
8615 | last_mark = next; |
8616 | } | |
8617 | ||
c91abf5a N |
8618 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) |
8619 | break; | |
1da177e4 LT |
8620 | |
8621 | /* | |
8622 | * this loop exits only if either when we are slower than | |
8623 | * the 'hard' speed limit, or the system was IO-idle for | |
8624 | * a jiffy. | |
8625 | * the system might be non-idle CPU-wise, but we only care | |
8626 | * about not overloading the IO subsystem. (things like an | |
8627 | * e2fsck being done on the RAID array should execute fast) | |
8628 | */ | |
1da177e4 LT |
8629 | cond_resched(); |
8630 | ||
ac7e50a3 XN |
8631 | recovery_done = io_sectors - atomic_read(&mddev->recovery_active); |
8632 | currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2 | |
57afd89f | 8633 | /((jiffies-mddev->resync_mark)/HZ +1) +1; |
1da177e4 | 8634 | |
88202a0c | 8635 | if (currspeed > speed_min(mddev)) { |
ac8fa419 | 8636 | if (currspeed > speed_max(mddev)) { |
c0e48521 | 8637 | msleep(500); |
1da177e4 LT |
8638 | goto repeat; |
8639 | } | |
ac8fa419 N |
8640 | if (!is_mddev_idle(mddev, 0)) { |
8641 | /* | |
8642 | * Give other IO more of a chance. | |
8643 | * The faster the devices, the less we wait. | |
8644 | */ | |
8645 | wait_event(mddev->recovery_wait, | |
8646 | !atomic_read(&mddev->recovery_active)); | |
8647 | } | |
1da177e4 LT |
8648 | } |
8649 | } | |
9d48739e N |
8650 | pr_info("md: %s: %s %s.\n",mdname(mddev), desc, |
8651 | test_bit(MD_RECOVERY_INTR, &mddev->recovery) | |
8652 | ? "interrupted" : "done"); | |
1da177e4 LT |
8653 | /* |
8654 | * this also signals 'finished resyncing' to md_stop | |
8655 | */ | |
7c2c57c9 | 8656 | blk_finish_plug(&plug); |
1da177e4 LT |
8657 | wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); |
8658 | ||
5ed1df2e N |
8659 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8660 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
1217e1d1 | 8661 | mddev->curr_resync > 3) { |
5ed1df2e N |
8662 | mddev->curr_resync_completed = mddev->curr_resync; |
8663 | sysfs_notify(&mddev->kobj, NULL, "sync_completed"); | |
8664 | } | |
09314799 | 8665 | mddev->pers->sync_request(mddev, max_sectors, &skipped); |
1da177e4 | 8666 | |
dfc70645 | 8667 | if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && |
1217e1d1 | 8668 | mddev->curr_resync > 3) { |
5fd6c1dc N |
8669 | if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { |
8670 | if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { | |
8671 | if (mddev->curr_resync >= mddev->recovery_cp) { | |
9d48739e N |
8672 | pr_debug("md: checkpointing %s of %s.\n", |
8673 | desc, mdname(mddev)); | |
0a19caab | 8674 | if (test_bit(MD_RECOVERY_ERROR, |
8675 | &mddev->recovery)) | |
8676 | mddev->recovery_cp = | |
8677 | mddev->curr_resync_completed; | |
8678 | else | |
8679 | mddev->recovery_cp = | |
8680 | mddev->curr_resync; | |
5fd6c1dc N |
8681 | } |
8682 | } else | |
8683 | mddev->recovery_cp = MaxSector; | |
8684 | } else { | |
8685 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) | |
8686 | mddev->curr_resync = MaxSector; | |
db0505d3 N |
8687 | if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8688 | test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) { | |
8689 | rcu_read_lock(); | |
8690 | rdev_for_each_rcu(rdev, mddev) | |
8691 | if (rdev->raid_disk >= 0 && | |
8692 | mddev->delta_disks >= 0 && | |
8693 | !test_bit(Journal, &rdev->flags) && | |
8694 | !test_bit(Faulty, &rdev->flags) && | |
8695 | !test_bit(In_sync, &rdev->flags) && | |
8696 | rdev->recovery_offset < mddev->curr_resync) | |
8697 | rdev->recovery_offset = mddev->curr_resync; | |
8698 | rcu_read_unlock(); | |
8699 | } | |
5fd6c1dc | 8700 | } |
1da177e4 | 8701 | } |
db91ff55 | 8702 | skip: |
bb8bf15b GJ |
8703 | /* set CHANGE_PENDING here since maybe another update is needed, |
8704 | * so other nodes are informed. It should be harmless for normal | |
8705 | * raid */ | |
2953079c SL |
8706 | set_mask_bits(&mddev->sb_flags, 0, |
8707 | BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS)); | |
c186b128 | 8708 | |
8876391e BC |
8709 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && |
8710 | !test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
8711 | mddev->delta_disks > 0 && | |
8712 | mddev->pers->finish_reshape && | |
8713 | mddev->pers->size && | |
8714 | mddev->queue) { | |
8715 | mddev_lock_nointr(mddev); | |
8716 | md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0)); | |
8717 | mddev_unlock(mddev); | |
aefb2e5f GJ |
8718 | if (!mddev_is_clustered(mddev)) { |
8719 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
8720 | revalidate_disk(mddev->gendisk); | |
8721 | } | |
8876391e BC |
8722 | } |
8723 | ||
23da422b | 8724 | spin_lock(&mddev->lock); |
c07b70ad N |
8725 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { |
8726 | /* We completed so min/max setting can be forgotten if used. */ | |
8727 | if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8728 | mddev->resync_min = 0; | |
8729 | mddev->resync_max = MaxSector; | |
8730 | } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) | |
8731 | mddev->resync_min = mddev->curr_resync_completed; | |
f7851be7 | 8732 | set_bit(MD_RECOVERY_DONE, &mddev->recovery); |
1da177e4 | 8733 | mddev->curr_resync = 0; |
23da422b N |
8734 | spin_unlock(&mddev->lock); |
8735 | ||
1da177e4 | 8736 | wake_up(&resync_wait); |
1da177e4 | 8737 | md_wakeup_thread(mddev->thread); |
c6207277 | 8738 | return; |
1da177e4 | 8739 | } |
29269553 | 8740 | EXPORT_SYMBOL_GPL(md_do_sync); |
1da177e4 | 8741 | |
746d3207 N |
8742 | static int remove_and_add_spares(struct mddev *mddev, |
8743 | struct md_rdev *this) | |
b4c4c7b8 | 8744 | { |
3cb03002 | 8745 | struct md_rdev *rdev; |
b4c4c7b8 | 8746 | int spares = 0; |
f2a371c5 | 8747 | int removed = 0; |
d787be40 | 8748 | bool remove_some = false; |
b4c4c7b8 | 8749 | |
39772f0a N |
8750 | if (this && test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) |
8751 | /* Mustn't remove devices when resync thread is running */ | |
8752 | return 0; | |
8753 | ||
d787be40 N |
8754 | rdev_for_each(rdev, mddev) { |
8755 | if ((this == NULL || rdev == this) && | |
8756 | rdev->raid_disk >= 0 && | |
8757 | !test_bit(Blocked, &rdev->flags) && | |
8758 | test_bit(Faulty, &rdev->flags) && | |
8759 | atomic_read(&rdev->nr_pending)==0) { | |
8760 | /* Faulty non-Blocked devices with nr_pending == 0 | |
8761 | * never get nr_pending incremented, | |
8762 | * never get Faulty cleared, and never get Blocked set. | |
8763 | * So we can synchronize_rcu now rather than once per device | |
8764 | */ | |
8765 | remove_some = true; | |
8766 | set_bit(RemoveSynchronized, &rdev->flags); | |
8767 | } | |
8768 | } | |
8769 | ||
8770 | if (remove_some) | |
8771 | synchronize_rcu(); | |
8772 | rdev_for_each(rdev, mddev) { | |
746d3207 N |
8773 | if ((this == NULL || rdev == this) && |
8774 | rdev->raid_disk >= 0 && | |
6bfe0b49 | 8775 | !test_bit(Blocked, &rdev->flags) && |
d787be40 | 8776 | ((test_bit(RemoveSynchronized, &rdev->flags) || |
f2076e7d SL |
8777 | (!test_bit(In_sync, &rdev->flags) && |
8778 | !test_bit(Journal, &rdev->flags))) && | |
d787be40 | 8779 | atomic_read(&rdev->nr_pending)==0)) { |
b4c4c7b8 | 8780 | if (mddev->pers->hot_remove_disk( |
b8321b68 | 8781 | mddev, rdev) == 0) { |
36fad858 | 8782 | sysfs_unlink_rdev(mddev, rdev); |
011abdc9 | 8783 | rdev->saved_raid_disk = rdev->raid_disk; |
b4c4c7b8 | 8784 | rdev->raid_disk = -1; |
f2a371c5 | 8785 | removed++; |
b4c4c7b8 N |
8786 | } |
8787 | } | |
d787be40 N |
8788 | if (remove_some && test_bit(RemoveSynchronized, &rdev->flags)) |
8789 | clear_bit(RemoveSynchronized, &rdev->flags); | |
8790 | } | |
8791 | ||
90584fc9 JB |
8792 | if (removed && mddev->kobj.sd) |
8793 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
b4c4c7b8 | 8794 | |
2910ff17 | 8795 | if (this && removed) |
746d3207 N |
8796 | goto no_add; |
8797 | ||
dafb20fa | 8798 | rdev_for_each(rdev, mddev) { |
2910ff17 GR |
8799 | if (this && this != rdev) |
8800 | continue; | |
dbb64f86 GR |
8801 | if (test_bit(Candidate, &rdev->flags)) |
8802 | continue; | |
7bfec5f3 N |
8803 | if (rdev->raid_disk >= 0 && |
8804 | !test_bit(In_sync, &rdev->flags) && | |
f2076e7d | 8805 | !test_bit(Journal, &rdev->flags) && |
7bfec5f3 N |
8806 | !test_bit(Faulty, &rdev->flags)) |
8807 | spares++; | |
7ceb17e8 N |
8808 | if (rdev->raid_disk >= 0) |
8809 | continue; | |
8810 | if (test_bit(Faulty, &rdev->flags)) | |
8811 | continue; | |
f6b6ec5c SL |
8812 | if (!test_bit(Journal, &rdev->flags)) { |
8813 | if (mddev->ro && | |
8814 | ! (rdev->saved_raid_disk >= 0 && | |
8815 | !test_bit(Bitmap_sync, &rdev->flags))) | |
8816 | continue; | |
7ceb17e8 | 8817 | |
f6b6ec5c SL |
8818 | rdev->recovery_offset = 0; |
8819 | } | |
7ceb17e8 N |
8820 | if (mddev->pers-> |
8821 | hot_add_disk(mddev, rdev) == 0) { | |
8822 | if (sysfs_link_rdev(mddev, rdev)) | |
8823 | /* failure here is OK */; | |
f6b6ec5c SL |
8824 | if (!test_bit(Journal, &rdev->flags)) |
8825 | spares++; | |
7ceb17e8 | 8826 | md_new_event(mddev); |
2953079c | 8827 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
dfc70645 | 8828 | } |
b4c4c7b8 | 8829 | } |
746d3207 | 8830 | no_add: |
6dafab6b | 8831 | if (removed) |
2953079c | 8832 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
b4c4c7b8 N |
8833 | return spares; |
8834 | } | |
7ebc0be7 | 8835 | |
ac05f256 N |
8836 | static void md_start_sync(struct work_struct *ws) |
8837 | { | |
8838 | struct mddev *mddev = container_of(ws, struct mddev, del_work); | |
c186b128 | 8839 | |
ac05f256 N |
8840 | mddev->sync_thread = md_register_thread(md_do_sync, |
8841 | mddev, | |
8842 | "resync"); | |
8843 | if (!mddev->sync_thread) { | |
9d48739e N |
8844 | pr_warn("%s: could not start resync thread...\n", |
8845 | mdname(mddev)); | |
ac05f256 N |
8846 | /* leave the spares where they are, it shouldn't hurt */ |
8847 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
8848 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
8849 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
8850 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
8851 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 8852 | wake_up(&resync_wait); |
ac05f256 N |
8853 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
8854 | &mddev->recovery)) | |
8855 | if (mddev->sysfs_action) | |
8856 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8857 | } else | |
8858 | md_wakeup_thread(mddev->sync_thread); | |
8859 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
8860 | md_new_event(mddev); | |
8861 | } | |
8862 | ||
1da177e4 LT |
8863 | /* |
8864 | * This routine is regularly called by all per-raid-array threads to | |
8865 | * deal with generic issues like resync and super-block update. | |
8866 | * Raid personalities that don't have a thread (linear/raid0) do not | |
8867 | * need this as they never do any recovery or update the superblock. | |
8868 | * | |
8869 | * It does not do any resync itself, but rather "forks" off other threads | |
8870 | * to do that as needed. | |
8871 | * When it is determined that resync is needed, we set MD_RECOVERY_RUNNING in | |
8872 | * "->recovery" and create a thread at ->sync_thread. | |
dfc70645 | 8873 | * When the thread finishes it sets MD_RECOVERY_DONE |
1da177e4 LT |
8874 | * and wakeups up this thread which will reap the thread and finish up. |
8875 | * This thread also removes any faulty devices (with nr_pending == 0). | |
8876 | * | |
8877 | * The overall approach is: | |
8878 | * 1/ if the superblock needs updating, update it. | |
8879 | * 2/ If a recovery thread is running, don't do anything else. | |
8880 | * 3/ If recovery has finished, clean up, possibly marking spares active. | |
8881 | * 4/ If there are any faulty devices, remove them. | |
8882 | * 5/ If array is degraded, try to add spares devices | |
8883 | * 6/ If array has spares or is not in-sync, start a resync thread. | |
8884 | */ | |
fd01b88c | 8885 | void md_check_recovery(struct mddev *mddev) |
1da177e4 | 8886 | { |
059421e0 N |
8887 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags) && mddev->sb_flags) { |
8888 | /* Write superblock - thread that called mddev_suspend() | |
8889 | * holds reconfig_mutex for us. | |
8890 | */ | |
8891 | set_bit(MD_UPDATING_SB, &mddev->flags); | |
8892 | smp_mb__after_atomic(); | |
8893 | if (test_bit(MD_ALLOW_SB_UPDATE, &mddev->flags)) | |
8894 | md_update_sb(mddev, 0); | |
8895 | clear_bit_unlock(MD_UPDATING_SB, &mddev->flags); | |
8896 | wake_up(&mddev->sb_wait); | |
8897 | } | |
8898 | ||
68866e42 JB |
8899 | if (mddev->suspended) |
8900 | return; | |
8901 | ||
5f40402d | 8902 | if (mddev->bitmap) |
e64e4018 | 8903 | md_bitmap_daemon_work(mddev); |
1da177e4 | 8904 | |
fca4d848 | 8905 | if (signal_pending(current)) { |
31a59e34 | 8906 | if (mddev->pers->sync_request && !mddev->external) { |
9d48739e N |
8907 | pr_debug("md: %s in immediate safe mode\n", |
8908 | mdname(mddev)); | |
fca4d848 N |
8909 | mddev->safemode = 2; |
8910 | } | |
8911 | flush_signals(current); | |
8912 | } | |
8913 | ||
c89a8eee N |
8914 | if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) |
8915 | return; | |
1da177e4 | 8916 | if ( ! ( |
2953079c | 8917 | (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) || |
1da177e4 | 8918 | test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
fca4d848 | 8919 | test_bit(MD_RECOVERY_DONE, &mddev->recovery) || |
31a59e34 | 8920 | (mddev->external == 0 && mddev->safemode == 1) || |
4ad23a97 | 8921 | (mddev->safemode == 2 |
fca4d848 | 8922 | && !mddev->in_sync && mddev->recovery_cp == MaxSector) |
1da177e4 LT |
8923 | )) |
8924 | return; | |
fca4d848 | 8925 | |
df5b89b3 | 8926 | if (mddev_trylock(mddev)) { |
b4c4c7b8 | 8927 | int spares = 0; |
fca4d848 | 8928 | |
afc1f55c | 8929 | if (!mddev->external && mddev->safemode == 1) |
33182d15 N |
8930 | mddev->safemode = 0; |
8931 | ||
c89a8eee | 8932 | if (mddev->ro) { |
ab16bfc7 NB |
8933 | struct md_rdev *rdev; |
8934 | if (!mddev->external && mddev->in_sync) | |
8935 | /* 'Blocked' flag not needed as failed devices | |
8936 | * will be recorded if array switched to read/write. | |
8937 | * Leaving it set will prevent the device | |
8938 | * from being removed. | |
8939 | */ | |
8940 | rdev_for_each(rdev, mddev) | |
8941 | clear_bit(Blocked, &rdev->flags); | |
7ceb17e8 N |
8942 | /* On a read-only array we can: |
8943 | * - remove failed devices | |
8944 | * - add already-in_sync devices if the array itself | |
8945 | * is in-sync. | |
8946 | * As we only add devices that are already in-sync, | |
8947 | * we can activate the spares immediately. | |
c89a8eee | 8948 | */ |
7ceb17e8 | 8949 | remove_and_add_spares(mddev, NULL); |
8313b8e5 N |
8950 | /* There is no thread, but we need to call |
8951 | * ->spare_active and clear saved_raid_disk | |
8952 | */ | |
2ac295a5 | 8953 | set_bit(MD_RECOVERY_INTR, &mddev->recovery); |
8313b8e5 | 8954 | md_reap_sync_thread(mddev); |
a4a3d26d | 8955 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
8313b8e5 | 8956 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
2953079c | 8957 | clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); |
c89a8eee N |
8958 | goto unlock; |
8959 | } | |
8960 | ||
659b254f GJ |
8961 | if (mddev_is_clustered(mddev)) { |
8962 | struct md_rdev *rdev; | |
8963 | /* kick the device if another node issued a | |
8964 | * remove disk. | |
8965 | */ | |
8966 | rdev_for_each(rdev, mddev) { | |
8967 | if (test_and_clear_bit(ClusterRemove, &rdev->flags) && | |
8968 | rdev->raid_disk < 0) | |
8969 | md_kick_rdev_from_array(rdev); | |
8970 | } | |
8971 | } | |
8972 | ||
6497709b | 8973 | if (!mddev->external && !mddev->in_sync) { |
85572d7c | 8974 | spin_lock(&mddev->lock); |
6497709b | 8975 | set_in_sync(mddev); |
85572d7c | 8976 | spin_unlock(&mddev->lock); |
fca4d848 | 8977 | } |
fca4d848 | 8978 | |
2953079c | 8979 | if (mddev->sb_flags) |
850b2b42 | 8980 | md_update_sb(mddev, 0); |
06d91a5f | 8981 | |
1da177e4 LT |
8982 | if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && |
8983 | !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { | |
8984 | /* resync/recovery still happening */ | |
8985 | clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
8986 | goto unlock; | |
8987 | } | |
8988 | if (mddev->sync_thread) { | |
a91d5ac0 | 8989 | md_reap_sync_thread(mddev); |
1da177e4 LT |
8990 | goto unlock; |
8991 | } | |
72a23c21 NB |
8992 | /* Set RUNNING before clearing NEEDED to avoid |
8993 | * any transients in the value of "sync_action". | |
8994 | */ | |
72f36d59 | 8995 | mddev->curr_resync_completed = 0; |
23da422b | 8996 | spin_lock(&mddev->lock); |
72a23c21 | 8997 | set_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
23da422b | 8998 | spin_unlock(&mddev->lock); |
24dd469d N |
8999 | /* Clear some bits that don't mean anything, but |
9000 | * might be left set | |
9001 | */ | |
24dd469d N |
9002 | clear_bit(MD_RECOVERY_INTR, &mddev->recovery); |
9003 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); | |
1da177e4 | 9004 | |
ed209584 N |
9005 | if (!test_and_clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || |
9006 | test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) | |
ac05f256 | 9007 | goto not_running; |
1da177e4 LT |
9008 | /* no recovery is running. |
9009 | * remove any failed drives, then | |
9010 | * add spares if possible. | |
72f36d59 | 9011 | * Spares are also removed and re-added, to allow |
1da177e4 LT |
9012 | * the personality to fail the re-add. |
9013 | */ | |
1da177e4 | 9014 | |
b4c4c7b8 | 9015 | if (mddev->reshape_position != MaxSector) { |
50ac168a N |
9016 | if (mddev->pers->check_reshape == NULL || |
9017 | mddev->pers->check_reshape(mddev) != 0) | |
b4c4c7b8 | 9018 | /* Cannot proceed */ |
ac05f256 | 9019 | goto not_running; |
b4c4c7b8 | 9020 | set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); |
72a23c21 | 9021 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
746d3207 | 9022 | } else if ((spares = remove_and_add_spares(mddev, NULL))) { |
24dd469d N |
9023 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9024 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
56ac36d7 | 9025 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); |
72a23c21 | 9026 | set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9027 | } else if (mddev->recovery_cp < MaxSector) { |
9028 | set_bit(MD_RECOVERY_SYNC, &mddev->recovery); | |
72a23c21 | 9029 | clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); |
24dd469d N |
9030 | } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) |
9031 | /* nothing to be done ... */ | |
ac05f256 | 9032 | goto not_running; |
24dd469d | 9033 | |
1da177e4 | 9034 | if (mddev->pers->sync_request) { |
ef99bf48 | 9035 | if (spares) { |
a654b9d8 N |
9036 | /* We are adding a device or devices to an array |
9037 | * which has the bitmap stored on all devices. | |
9038 | * So make sure all bitmap pages get written | |
9039 | */ | |
e64e4018 | 9040 | md_bitmap_write_all(mddev->bitmap); |
a654b9d8 | 9041 | } |
ac05f256 N |
9042 | INIT_WORK(&mddev->del_work, md_start_sync); |
9043 | queue_work(md_misc_wq, &mddev->del_work); | |
9044 | goto unlock; | |
1da177e4 | 9045 | } |
ac05f256 | 9046 | not_running: |
72a23c21 NB |
9047 | if (!mddev->sync_thread) { |
9048 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); | |
f851b60d | 9049 | wake_up(&resync_wait); |
72a23c21 NB |
9050 | if (test_and_clear_bit(MD_RECOVERY_RECOVER, |
9051 | &mddev->recovery)) | |
0c3573f1 | 9052 | if (mddev->sysfs_action) |
00bcb4ac | 9053 | sysfs_notify_dirent_safe(mddev->sysfs_action); |
72a23c21 | 9054 | } |
ac05f256 N |
9055 | unlock: |
9056 | wake_up(&mddev->sb_wait); | |
1da177e4 LT |
9057 | mddev_unlock(mddev); |
9058 | } | |
9059 | } | |
6c144d31 | 9060 | EXPORT_SYMBOL(md_check_recovery); |
1da177e4 | 9061 | |
a91d5ac0 JB |
9062 | void md_reap_sync_thread(struct mddev *mddev) |
9063 | { | |
9064 | struct md_rdev *rdev; | |
aefb2e5f GJ |
9065 | sector_t old_dev_sectors = mddev->dev_sectors; |
9066 | bool is_reshaped = false; | |
a91d5ac0 JB |
9067 | |
9068 | /* resync has finished, collect result */ | |
9069 | md_unregister_thread(&mddev->sync_thread); | |
9070 | if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) && | |
9071 | !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) { | |
9072 | /* success...*/ | |
9073 | /* activate any spares */ | |
9074 | if (mddev->pers->spare_active(mddev)) { | |
9075 | sysfs_notify(&mddev->kobj, NULL, | |
9076 | "degraded"); | |
2953079c | 9077 | set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); |
a91d5ac0 JB |
9078 | } |
9079 | } | |
9080 | if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && | |
aefb2e5f | 9081 | mddev->pers->finish_reshape) { |
a91d5ac0 | 9082 | mddev->pers->finish_reshape(mddev); |
aefb2e5f GJ |
9083 | if (mddev_is_clustered(mddev)) |
9084 | is_reshaped = true; | |
9085 | } | |
a91d5ac0 JB |
9086 | |
9087 | /* If array is no-longer degraded, then any saved_raid_disk | |
f466722c | 9088 | * information must be scrapped. |
a91d5ac0 | 9089 | */ |
f466722c N |
9090 | if (!mddev->degraded) |
9091 | rdev_for_each(rdev, mddev) | |
a91d5ac0 JB |
9092 | rdev->saved_raid_disk = -1; |
9093 | ||
9094 | md_update_sb(mddev, 1); | |
2953079c | 9095 | /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can |
bb8bf15b GJ |
9096 | * call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by |
9097 | * clustered raid */ | |
9098 | if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags)) | |
9099 | md_cluster_ops->resync_finish(mddev); | |
a91d5ac0 | 9100 | clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); |
ea358cd0 | 9101 | clear_bit(MD_RECOVERY_DONE, &mddev->recovery); |
a91d5ac0 JB |
9102 | clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
9103 | clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); | |
9104 | clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); | |
9105 | clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); | |
aefb2e5f GJ |
9106 | /* |
9107 | * We call md_cluster_ops->update_size here because sync_size could | |
9108 | * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, | |
9109 | * so it is time to update size across cluster. | |
9110 | */ | |
9111 | if (mddev_is_clustered(mddev) && is_reshaped | |
9112 | && !test_bit(MD_CLOSING, &mddev->flags)) | |
9113 | md_cluster_ops->update_size(mddev, old_dev_sectors); | |
f851b60d | 9114 | wake_up(&resync_wait); |
a91d5ac0 JB |
9115 | /* flag recovery needed just to double check */ |
9116 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9117 | sysfs_notify_dirent_safe(mddev->sysfs_action); | |
9118 | md_new_event(mddev); | |
9119 | if (mddev->event_work.func) | |
9120 | queue_work(md_misc_wq, &mddev->event_work); | |
9121 | } | |
6c144d31 | 9122 | EXPORT_SYMBOL(md_reap_sync_thread); |
a91d5ac0 | 9123 | |
fd01b88c | 9124 | void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev) |
6bfe0b49 | 9125 | { |
00bcb4ac | 9126 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
6bfe0b49 | 9127 | wait_event_timeout(rdev->blocked_wait, |
de393cde N |
9128 | !test_bit(Blocked, &rdev->flags) && |
9129 | !test_bit(BlockedBadBlocks, &rdev->flags), | |
6bfe0b49 DW |
9130 | msecs_to_jiffies(5000)); |
9131 | rdev_dec_pending(rdev, mddev); | |
9132 | } | |
9133 | EXPORT_SYMBOL(md_wait_for_blocked_rdev); | |
9134 | ||
c6563a8c N |
9135 | void md_finish_reshape(struct mddev *mddev) |
9136 | { | |
9137 | /* called be personality module when reshape completes. */ | |
9138 | struct md_rdev *rdev; | |
9139 | ||
9140 | rdev_for_each(rdev, mddev) { | |
9141 | if (rdev->data_offset > rdev->new_data_offset) | |
9142 | rdev->sectors += rdev->data_offset - rdev->new_data_offset; | |
9143 | else | |
9144 | rdev->sectors -= rdev->new_data_offset - rdev->data_offset; | |
9145 | rdev->data_offset = rdev->new_data_offset; | |
9146 | } | |
9147 | } | |
9148 | EXPORT_SYMBOL(md_finish_reshape); | |
2230dfe4 | 9149 | |
fc974ee2 | 9150 | /* Bad block management */ |
2230dfe4 | 9151 | |
fc974ee2 | 9152 | /* Returns 1 on success, 0 on failure */ |
3cb03002 | 9153 | int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
c6563a8c | 9154 | int is_new) |
2230dfe4 | 9155 | { |
85ad1d13 | 9156 | struct mddev *mddev = rdev->mddev; |
c6563a8c N |
9157 | int rv; |
9158 | if (is_new) | |
9159 | s += rdev->new_data_offset; | |
9160 | else | |
9161 | s += rdev->data_offset; | |
fc974ee2 VV |
9162 | rv = badblocks_set(&rdev->badblocks, s, sectors, 0); |
9163 | if (rv == 0) { | |
2230dfe4 | 9164 | /* Make sure they get written out promptly */ |
35b785f7 TM |
9165 | if (test_bit(ExternalBbl, &rdev->flags)) |
9166 | sysfs_notify(&rdev->kobj, NULL, | |
9167 | "unacknowledged_bad_blocks"); | |
8bd2f0a0 | 9168 | sysfs_notify_dirent_safe(rdev->sysfs_state); |
2953079c SL |
9169 | set_mask_bits(&mddev->sb_flags, 0, |
9170 | BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING)); | |
2230dfe4 | 9171 | md_wakeup_thread(rdev->mddev->thread); |
fc974ee2 VV |
9172 | return 1; |
9173 | } else | |
9174 | return 0; | |
2230dfe4 N |
9175 | } |
9176 | EXPORT_SYMBOL_GPL(rdev_set_badblocks); | |
9177 | ||
c6563a8c N |
9178 | int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
9179 | int is_new) | |
2230dfe4 | 9180 | { |
35b785f7 | 9181 | int rv; |
c6563a8c N |
9182 | if (is_new) |
9183 | s += rdev->new_data_offset; | |
9184 | else | |
9185 | s += rdev->data_offset; | |
35b785f7 TM |
9186 | rv = badblocks_clear(&rdev->badblocks, s, sectors); |
9187 | if ((rv == 0) && test_bit(ExternalBbl, &rdev->flags)) | |
9188 | sysfs_notify(&rdev->kobj, NULL, "bad_blocks"); | |
9189 | return rv; | |
2230dfe4 N |
9190 | } |
9191 | EXPORT_SYMBOL_GPL(rdev_clear_badblocks); | |
9192 | ||
75c96f85 AB |
9193 | static int md_notify_reboot(struct notifier_block *this, |
9194 | unsigned long code, void *x) | |
1da177e4 LT |
9195 | { |
9196 | struct list_head *tmp; | |
fd01b88c | 9197 | struct mddev *mddev; |
2dba6a91 | 9198 | int need_delay = 0; |
1da177e4 | 9199 | |
c744a65c N |
9200 | for_each_mddev(mddev, tmp) { |
9201 | if (mddev_trylock(mddev)) { | |
30b8aa91 N |
9202 | if (mddev->pers) |
9203 | __md_stop_writes(mddev); | |
0f62fb22 N |
9204 | if (mddev->persistent) |
9205 | mddev->safemode = 2; | |
c744a65c | 9206 | mddev_unlock(mddev); |
2dba6a91 | 9207 | } |
c744a65c | 9208 | need_delay = 1; |
1da177e4 | 9209 | } |
c744a65c N |
9210 | /* |
9211 | * certain more exotic SCSI devices are known to be | |
9212 | * volatile wrt too early system reboots. While the | |
9213 | * right place to handle this issue is the given | |
9214 | * driver, we do want to have a safe RAID driver ... | |
9215 | */ | |
9216 | if (need_delay) | |
9217 | mdelay(1000*1); | |
9218 | ||
1da177e4 LT |
9219 | return NOTIFY_DONE; |
9220 | } | |
9221 | ||
75c96f85 | 9222 | static struct notifier_block md_notifier = { |
1da177e4 LT |
9223 | .notifier_call = md_notify_reboot, |
9224 | .next = NULL, | |
9225 | .priority = INT_MAX, /* before any real devices */ | |
9226 | }; | |
9227 | ||
9228 | static void md_geninit(void) | |
9229 | { | |
36a4e1fe | 9230 | pr_debug("md: sizeof(mdp_super_t) = %d\n", (int)sizeof(mdp_super_t)); |
1da177e4 | 9231 | |
c7705f34 | 9232 | proc_create("mdstat", S_IRUGO, NULL, &md_seq_fops); |
1da177e4 LT |
9233 | } |
9234 | ||
75c96f85 | 9235 | static int __init md_init(void) |
1da177e4 | 9236 | { |
e804ac78 TH |
9237 | int ret = -ENOMEM; |
9238 | ||
ada609ee | 9239 | md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0); |
e804ac78 TH |
9240 | if (!md_wq) |
9241 | goto err_wq; | |
9242 | ||
9243 | md_misc_wq = alloc_workqueue("md_misc", 0, 0); | |
9244 | if (!md_misc_wq) | |
9245 | goto err_misc_wq; | |
9246 | ||
9247 | if ((ret = register_blkdev(MD_MAJOR, "md")) < 0) | |
9248 | goto err_md; | |
9249 | ||
9250 | if ((ret = register_blkdev(0, "mdp")) < 0) | |
9251 | goto err_mdp; | |
9252 | mdp_major = ret; | |
9253 | ||
af5628f0 | 9254 | blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE, |
e8703fe1 N |
9255 | md_probe, NULL, NULL); |
9256 | blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, | |
1da177e4 LT |
9257 | md_probe, NULL, NULL); |
9258 | ||
1da177e4 | 9259 | register_reboot_notifier(&md_notifier); |
0b4d4147 | 9260 | raid_table_header = register_sysctl_table(raid_root_table); |
1da177e4 LT |
9261 | |
9262 | md_geninit(); | |
d710e138 | 9263 | return 0; |
1da177e4 | 9264 | |
e804ac78 TH |
9265 | err_mdp: |
9266 | unregister_blkdev(MD_MAJOR, "md"); | |
9267 | err_md: | |
9268 | destroy_workqueue(md_misc_wq); | |
9269 | err_misc_wq: | |
9270 | destroy_workqueue(md_wq); | |
9271 | err_wq: | |
9272 | return ret; | |
9273 | } | |
1da177e4 | 9274 | |
70bcecdb | 9275 | static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) |
1d7e3e96 | 9276 | { |
70bcecdb GR |
9277 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); |
9278 | struct md_rdev *rdev2; | |
9279 | int role, ret; | |
9280 | char b[BDEVNAME_SIZE]; | |
1d7e3e96 | 9281 | |
818da59f GJ |
9282 | /* |
9283 | * If size is changed in another node then we need to | |
9284 | * do resize as well. | |
9285 | */ | |
9286 | if (mddev->dev_sectors != le64_to_cpu(sb->size)) { | |
9287 | ret = mddev->pers->resize(mddev, le64_to_cpu(sb->size)); | |
9288 | if (ret) | |
9289 | pr_info("md-cluster: resize failed\n"); | |
9290 | else | |
e64e4018 | 9291 | md_bitmap_update_sb(mddev->bitmap); |
818da59f GJ |
9292 | } |
9293 | ||
70bcecdb GR |
9294 | /* Check for change of roles in the active devices */ |
9295 | rdev_for_each(rdev2, mddev) { | |
9296 | if (test_bit(Faulty, &rdev2->flags)) | |
9297 | continue; | |
9298 | ||
9299 | /* Check if the roles changed */ | |
9300 | role = le16_to_cpu(sb->dev_roles[rdev2->desc_nr]); | |
dbb64f86 GR |
9301 | |
9302 | if (test_bit(Candidate, &rdev2->flags)) { | |
9303 | if (role == 0xfffe) { | |
9304 | pr_info("md: Removing Candidate device %s because add failed\n", bdevname(rdev2->bdev,b)); | |
9305 | md_kick_rdev_from_array(rdev2); | |
9306 | continue; | |
9307 | } | |
9308 | else | |
9309 | clear_bit(Candidate, &rdev2->flags); | |
9310 | } | |
9311 | ||
70bcecdb | 9312 | if (role != rdev2->raid_disk) { |
ca1e98e0 GJ |
9313 | /* |
9314 | * got activated except reshape is happening. | |
9315 | */ | |
9316 | if (rdev2->raid_disk == -1 && role != 0xffff && | |
9317 | !(le32_to_cpu(sb->feature_map) & | |
9318 | MD_FEATURE_RESHAPE_ACTIVE)) { | |
70bcecdb GR |
9319 | rdev2->saved_raid_disk = role; |
9320 | ret = remove_and_add_spares(mddev, rdev2); | |
9321 | pr_info("Activated spare: %s\n", | |
9d48739e | 9322 | bdevname(rdev2->bdev,b)); |
a578183e GJ |
9323 | /* wakeup mddev->thread here, so array could |
9324 | * perform resync with the new activated disk */ | |
9325 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
9326 | md_wakeup_thread(mddev->thread); | |
70bcecdb GR |
9327 | } |
9328 | /* device faulty | |
9329 | * We just want to do the minimum to mark the disk | |
9330 | * as faulty. The recovery is performed by the | |
9331 | * one who initiated the error. | |
9332 | */ | |
9333 | if ((role == 0xfffe) || (role == 0xfffd)) { | |
9334 | md_error(mddev, rdev2); | |
9335 | clear_bit(Blocked, &rdev2->flags); | |
9336 | } | |
9337 | } | |
1d7e3e96 | 9338 | } |
70bcecdb | 9339 | |
28c1b9fd GR |
9340 | if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) |
9341 | update_raid_disks(mddev, le32_to_cpu(sb->raid_disks)); | |
70bcecdb | 9342 | |
7564beda GJ |
9343 | /* |
9344 | * Since mddev->delta_disks has already updated in update_raid_disks, | |
9345 | * so it is time to check reshape. | |
9346 | */ | |
9347 | if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9348 | (le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9349 | /* | |
9350 | * reshape is happening in the remote node, we need to | |
9351 | * update reshape_position and call start_reshape. | |
9352 | */ | |
ed4d0a4e | 9353 | mddev->reshape_position = le64_to_cpu(sb->reshape_position); |
7564beda GJ |
9354 | if (mddev->pers->update_reshape_pos) |
9355 | mddev->pers->update_reshape_pos(mddev); | |
9356 | if (mddev->pers->start_reshape) | |
9357 | mddev->pers->start_reshape(mddev); | |
9358 | } else if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) && | |
9359 | mddev->reshape_position != MaxSector && | |
9360 | !(le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) { | |
9361 | /* reshape is just done in another node. */ | |
9362 | mddev->reshape_position = MaxSector; | |
9363 | if (mddev->pers->update_reshape_pos) | |
9364 | mddev->pers->update_reshape_pos(mddev); | |
9365 | } | |
9366 | ||
70bcecdb GR |
9367 | /* Finally set the event to be up to date */ |
9368 | mddev->events = le64_to_cpu(sb->events); | |
9369 | } | |
9370 | ||
9371 | static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) | |
9372 | { | |
9373 | int err; | |
9374 | struct page *swapout = rdev->sb_page; | |
9375 | struct mdp_superblock_1 *sb; | |
9376 | ||
9377 | /* Store the sb page of the rdev in the swapout temporary | |
9378 | * variable in case we err in the future | |
9379 | */ | |
9380 | rdev->sb_page = NULL; | |
7f0f0d87 N |
9381 | err = alloc_disk_sb(rdev); |
9382 | if (err == 0) { | |
9383 | ClearPageUptodate(rdev->sb_page); | |
9384 | rdev->sb_loaded = 0; | |
9385 | err = super_types[mddev->major_version]. | |
9386 | load_super(rdev, NULL, mddev->minor_version); | |
9387 | } | |
70bcecdb GR |
9388 | if (err < 0) { |
9389 | pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n", | |
9390 | __func__, __LINE__, rdev->desc_nr, err); | |
7f0f0d87 N |
9391 | if (rdev->sb_page) |
9392 | put_page(rdev->sb_page); | |
70bcecdb GR |
9393 | rdev->sb_page = swapout; |
9394 | rdev->sb_loaded = 1; | |
9395 | return err; | |
1d7e3e96 GR |
9396 | } |
9397 | ||
70bcecdb GR |
9398 | sb = page_address(rdev->sb_page); |
9399 | /* Read the offset unconditionally, even if MD_FEATURE_RECOVERY_OFFSET | |
9400 | * is not set | |
9401 | */ | |
9402 | ||
9403 | if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)) | |
9404 | rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); | |
9405 | ||
9406 | /* The other node finished recovery, call spare_active to set | |
9407 | * device In_sync and mddev->degraded | |
9408 | */ | |
9409 | if (rdev->recovery_offset == MaxSector && | |
9410 | !test_bit(In_sync, &rdev->flags) && | |
9411 | mddev->pers->spare_active(mddev)) | |
9412 | sysfs_notify(&mddev->kobj, NULL, "degraded"); | |
9413 | ||
9414 | put_page(swapout); | |
9415 | return 0; | |
9416 | } | |
9417 | ||
9418 | void md_reload_sb(struct mddev *mddev, int nr) | |
9419 | { | |
9420 | struct md_rdev *rdev; | |
9421 | int err; | |
9422 | ||
9423 | /* Find the rdev */ | |
9424 | rdev_for_each_rcu(rdev, mddev) { | |
9425 | if (rdev->desc_nr == nr) | |
9426 | break; | |
9427 | } | |
9428 | ||
9429 | if (!rdev || rdev->desc_nr != nr) { | |
9430 | pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr); | |
9431 | return; | |
9432 | } | |
9433 | ||
9434 | err = read_rdev(mddev, rdev); | |
9435 | if (err < 0) | |
9436 | return; | |
9437 | ||
9438 | check_sb_changes(mddev, rdev); | |
9439 | ||
9440 | /* Read all rdev's to update recovery_offset */ | |
0ea9924a GJ |
9441 | rdev_for_each_rcu(rdev, mddev) { |
9442 | if (!test_bit(Faulty, &rdev->flags)) | |
9443 | read_rdev(mddev, rdev); | |
9444 | } | |
1d7e3e96 GR |
9445 | } |
9446 | EXPORT_SYMBOL(md_reload_sb); | |
9447 | ||
1da177e4 LT |
9448 | #ifndef MODULE |
9449 | ||
9450 | /* | |
9451 | * Searches all registered partitions for autorun RAID arrays | |
9452 | * at boot time. | |
9453 | */ | |
4d936ec1 | 9454 | |
5b1f5bc3 | 9455 | static DEFINE_MUTEX(detected_devices_mutex); |
4d936ec1 ME |
9456 | static LIST_HEAD(all_detected_devices); |
9457 | struct detected_devices_node { | |
9458 | struct list_head list; | |
9459 | dev_t dev; | |
9460 | }; | |
1da177e4 LT |
9461 | |
9462 | void md_autodetect_dev(dev_t dev) | |
9463 | { | |
4d936ec1 ME |
9464 | struct detected_devices_node *node_detected_dev; |
9465 | ||
9466 | node_detected_dev = kzalloc(sizeof(*node_detected_dev), GFP_KERNEL); | |
9467 | if (node_detected_dev) { | |
9468 | node_detected_dev->dev = dev; | |
5b1f5bc3 | 9469 | mutex_lock(&detected_devices_mutex); |
4d936ec1 | 9470 | list_add_tail(&node_detected_dev->list, &all_detected_devices); |
5b1f5bc3 | 9471 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9472 | } |
1da177e4 LT |
9473 | } |
9474 | ||
1da177e4 LT |
9475 | static void autostart_arrays(int part) |
9476 | { | |
3cb03002 | 9477 | struct md_rdev *rdev; |
4d936ec1 ME |
9478 | struct detected_devices_node *node_detected_dev; |
9479 | dev_t dev; | |
9480 | int i_scanned, i_passed; | |
1da177e4 | 9481 | |
4d936ec1 ME |
9482 | i_scanned = 0; |
9483 | i_passed = 0; | |
1da177e4 | 9484 | |
9d48739e | 9485 | pr_info("md: Autodetecting RAID arrays.\n"); |
1da177e4 | 9486 | |
5b1f5bc3 | 9487 | mutex_lock(&detected_devices_mutex); |
4d936ec1 ME |
9488 | while (!list_empty(&all_detected_devices) && i_scanned < INT_MAX) { |
9489 | i_scanned++; | |
9490 | node_detected_dev = list_entry(all_detected_devices.next, | |
9491 | struct detected_devices_node, list); | |
9492 | list_del(&node_detected_dev->list); | |
9493 | dev = node_detected_dev->dev; | |
9494 | kfree(node_detected_dev); | |
90bcf133 | 9495 | mutex_unlock(&detected_devices_mutex); |
df968c4e | 9496 | rdev = md_import_device(dev,0, 90); |
90bcf133 | 9497 | mutex_lock(&detected_devices_mutex); |
1da177e4 LT |
9498 | if (IS_ERR(rdev)) |
9499 | continue; | |
9500 | ||
403df478 | 9501 | if (test_bit(Faulty, &rdev->flags)) |
1da177e4 | 9502 | continue; |
403df478 | 9503 | |
d0fae18f | 9504 | set_bit(AutoDetected, &rdev->flags); |
1da177e4 | 9505 | list_add(&rdev->same_set, &pending_raid_disks); |
4d936ec1 | 9506 | i_passed++; |
1da177e4 | 9507 | } |
5b1f5bc3 | 9508 | mutex_unlock(&detected_devices_mutex); |
4d936ec1 | 9509 | |
9d48739e | 9510 | pr_debug("md: Scanned %d and added %d devices.\n", i_scanned, i_passed); |
1da177e4 LT |
9511 | |
9512 | autorun_devices(part); | |
9513 | } | |
9514 | ||
fdee8ae4 | 9515 | #endif /* !MODULE */ |
1da177e4 LT |
9516 | |
9517 | static __exit void md_exit(void) | |
9518 | { | |
fd01b88c | 9519 | struct mddev *mddev; |
1da177e4 | 9520 | struct list_head *tmp; |
e2f23b60 | 9521 | int delay = 1; |
8ab5e4c1 | 9522 | |
af5628f0 | 9523 | blk_unregister_region(MKDEV(MD_MAJOR,0), 512); |
e8703fe1 | 9524 | blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); |
1da177e4 | 9525 | |
3dbd8c2e | 9526 | unregister_blkdev(MD_MAJOR,"md"); |
1da177e4 LT |
9527 | unregister_blkdev(mdp_major, "mdp"); |
9528 | unregister_reboot_notifier(&md_notifier); | |
9529 | unregister_sysctl_table(raid_table_header); | |
e2f23b60 N |
9530 | |
9531 | /* We cannot unload the modules while some process is | |
9532 | * waiting for us in select() or poll() - wake them up | |
9533 | */ | |
9534 | md_unloading = 1; | |
9535 | while (waitqueue_active(&md_event_waiters)) { | |
9536 | /* not safe to leave yet */ | |
9537 | wake_up(&md_event_waiters); | |
9538 | msleep(delay); | |
9539 | delay += delay; | |
9540 | } | |
1da177e4 | 9541 | remove_proc_entry("mdstat", NULL); |
e2f23b60 | 9542 | |
29ac4aa3 | 9543 | for_each_mddev(mddev, tmp) { |
1da177e4 | 9544 | export_array(mddev); |
9356863c | 9545 | mddev->ctime = 0; |
d3374825 | 9546 | mddev->hold_active = 0; |
9356863c N |
9547 | /* |
9548 | * for_each_mddev() will call mddev_put() at the end of each | |
9549 | * iteration. As the mddev is now fully clear, this will | |
9550 | * schedule the mddev for destruction by a workqueue, and the | |
9551 | * destroy_workqueue() below will wait for that to complete. | |
9552 | */ | |
1da177e4 | 9553 | } |
e804ac78 TH |
9554 | destroy_workqueue(md_misc_wq); |
9555 | destroy_workqueue(md_wq); | |
1da177e4 LT |
9556 | } |
9557 | ||
685784aa | 9558 | subsys_initcall(md_init); |
1da177e4 LT |
9559 | module_exit(md_exit) |
9560 | ||
e4dca7b7 | 9561 | static int get_ro(char *buffer, const struct kernel_param *kp) |
f91de92e N |
9562 | { |
9563 | return sprintf(buffer, "%d", start_readonly); | |
9564 | } | |
e4dca7b7 | 9565 | static int set_ro(const char *val, const struct kernel_param *kp) |
f91de92e | 9566 | { |
4c9309c0 | 9567 | return kstrtouint(val, 10, (unsigned int *)&start_readonly); |
f91de92e N |
9568 | } |
9569 | ||
80ca3a44 N |
9570 | module_param_call(start_ro, set_ro, get_ro, NULL, S_IRUSR|S_IWUSR); |
9571 | module_param(start_dirty_degraded, int, S_IRUGO|S_IWUSR); | |
efeb53c0 | 9572 | module_param_call(new_array, add_named_array, NULL, NULL, S_IWUSR); |
78b6350d | 9573 | module_param(create_on_open, bool, S_IRUSR|S_IWUSR); |
f91de92e | 9574 | |
1da177e4 | 9575 | MODULE_LICENSE("GPL"); |
0efb9e61 | 9576 | MODULE_DESCRIPTION("MD RAID framework"); |
aa1595e9 | 9577 | MODULE_ALIAS("md"); |
72008652 | 9578 | MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR); |