Commit | Line | Data |
---|---|---|
8e854e9c GR |
1 | /* |
2 | * Copyright (C) 2015, SUSE | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2, or (at your option) | |
7 | * any later version. | |
8 | * | |
9 | */ | |
10 | ||
11 | ||
12 | #include <linux/module.h> | |
7bcda714 | 13 | #include <linux/kthread.h> |
47741b7c GR |
14 | #include <linux/dlm.h> |
15 | #include <linux/sched.h> | |
1aee41f6 | 16 | #include <linux/raid/md_p.h> |
47741b7c | 17 | #include "md.h" |
935fe098 | 18 | #include "md-bitmap.h" |
edb39c9d | 19 | #include "md-cluster.h" |
47741b7c GR |
20 | |
21 | #define LVB_SIZE 64 | |
1aee41f6 | 22 | #define NEW_DEV_TIMEOUT 5000 |
47741b7c GR |
23 | |
24 | struct dlm_lock_resource { | |
25 | dlm_lockspace_t *ls; | |
26 | struct dlm_lksb lksb; | |
27 | char *name; /* lock name. */ | |
28 | uint32_t flags; /* flags to pass to dlm_lock() */ | |
fccb60a4 GJ |
29 | wait_queue_head_t sync_locking; /* wait queue for synchronized locking */ |
30 | bool sync_locking_done; | |
c4ce867f GR |
31 | void (*bast)(void *arg, int mode); /* blocking AST function pointer*/ |
32 | struct mddev *mddev; /* pointing back to mddev. */ | |
dbb64f86 | 33 | int mode; |
c4ce867f GR |
34 | }; |
35 | ||
96ae923a GR |
36 | struct suspend_info { |
37 | int slot; | |
38 | sector_t lo; | |
39 | sector_t hi; | |
40 | struct list_head list; | |
41 | }; | |
42 | ||
43 | struct resync_info { | |
44 | __le64 lo; | |
45 | __le64 hi; | |
46 | }; | |
47 | ||
fa8259da GR |
48 | /* md_cluster_info flags */ |
49 | #define MD_CLUSTER_WAITING_FOR_NEWDISK 1 | |
90382ed9 | 50 | #define MD_CLUSTER_SUSPEND_READ_BALANCING 2 |
eece075c | 51 | #define MD_CLUSTER_BEGIN_JOIN_CLUSTER 3 |
fa8259da | 52 | |
8b9277c8 GJ |
53 | /* Lock the send communication. This is done through |
54 | * bit manipulation as opposed to a mutex in order to | |
55 | * accomodate lock and hold. See next comment. | |
56 | */ | |
57 | #define MD_CLUSTER_SEND_LOCK 4 | |
e19508fa GJ |
58 | /* If cluster operations (such as adding a disk) must lock the |
59 | * communication channel, so as to perform extra operations | |
60 | * (update metadata) and no other operation is allowed on the | |
61 | * MD. Token needs to be locked and held until the operation | |
62 | * completes witha md_update_sb(), which would eventually release | |
63 | * the lock. | |
8b9277c8 GJ |
64 | */ |
65 | #define MD_CLUSTER_SEND_LOCKED_ALREADY 5 | |
51e453ae GJ |
66 | /* We should receive message after node joined cluster and |
67 | * set up all the related infos such as bitmap and personality */ | |
68 | #define MD_CLUSTER_ALREADY_IN_CLUSTER 6 | |
69 | #define MD_CLUSTER_PENDING_RECV_EVENT 7 | |
0ba95977 | 70 | #define MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD 8 |
fa8259da | 71 | |
c4ce867f | 72 | struct md_cluster_info { |
0ba95977 | 73 | struct mddev *mddev; /* the md device which md_cluster_info belongs to */ |
c4ce867f GR |
74 | /* dlm lock space and resources for clustered raid. */ |
75 | dlm_lockspace_t *lockspace; | |
cf921cc1 GR |
76 | int slot_number; |
77 | struct completion completion; | |
8b9277c8 | 78 | struct mutex recv_mutex; |
54519c5f | 79 | struct dlm_lock_resource *bitmap_lockres; |
f6a2dc64 | 80 | struct dlm_lock_resource **other_bitmap_lockres; |
c186b128 | 81 | struct dlm_lock_resource *resync_lockres; |
96ae923a GR |
82 | struct list_head suspend_list; |
83 | spinlock_t suspend_lock; | |
e94987db GR |
84 | struct md_thread *recovery_thread; |
85 | unsigned long recovery_map; | |
4664680c GR |
86 | /* communication loc resources */ |
87 | struct dlm_lock_resource *ack_lockres; | |
88 | struct dlm_lock_resource *message_lockres; | |
89 | struct dlm_lock_resource *token_lockres; | |
1aee41f6 | 90 | struct dlm_lock_resource *no_new_dev_lockres; |
4664680c | 91 | struct md_thread *recv_thread; |
1aee41f6 | 92 | struct completion newdisk_completion; |
8b9277c8 | 93 | wait_queue_head_t wait; |
fa8259da | 94 | unsigned long state; |
18c9ff7f GJ |
95 | /* record the region in RESYNCING message */ |
96 | sector_t sync_low; | |
97 | sector_t sync_hi; | |
4664680c GR |
98 | }; |
99 | ||
100 | enum msg_type { | |
101 | METADATA_UPDATED = 0, | |
102 | RESYNCING, | |
1aee41f6 | 103 | NEWDISK, |
88bcfef7 | 104 | REMOVE, |
97f6cd39 | 105 | RE_ADD, |
dc737d7c | 106 | BITMAP_NEEDS_SYNC, |
7da3d203 | 107 | CHANGE_CAPACITY, |
afd75628 | 108 | BITMAP_RESIZE, |
4664680c GR |
109 | }; |
110 | ||
111 | struct cluster_msg { | |
cf97a348 GJ |
112 | __le32 type; |
113 | __le32 slot; | |
1aee41f6 | 114 | /* TODO: Unionize this for smaller footprint */ |
cf97a348 GJ |
115 | __le64 low; |
116 | __le64 high; | |
1aee41f6 | 117 | char uuid[16]; |
cf97a348 | 118 | __le32 raid_slot; |
47741b7c GR |
119 | }; |
120 | ||
121 | static void sync_ast(void *arg) | |
122 | { | |
123 | struct dlm_lock_resource *res; | |
124 | ||
2e2a7cd9 | 125 | res = arg; |
fccb60a4 GJ |
126 | res->sync_locking_done = true; |
127 | wake_up(&res->sync_locking); | |
47741b7c GR |
128 | } |
129 | ||
130 | static int dlm_lock_sync(struct dlm_lock_resource *res, int mode) | |
131 | { | |
132 | int ret = 0; | |
133 | ||
47741b7c GR |
134 | ret = dlm_lock(res->ls, mode, &res->lksb, |
135 | res->flags, res->name, strlen(res->name), | |
136 | 0, sync_ast, res, res->bast); | |
137 | if (ret) | |
138 | return ret; | |
fccb60a4 GJ |
139 | wait_event(res->sync_locking, res->sync_locking_done); |
140 | res->sync_locking_done = false; | |
dbb64f86 GR |
141 | if (res->lksb.sb_status == 0) |
142 | res->mode = mode; | |
47741b7c GR |
143 | return res->lksb.sb_status; |
144 | } | |
145 | ||
146 | static int dlm_unlock_sync(struct dlm_lock_resource *res) | |
147 | { | |
148 | return dlm_lock_sync(res, DLM_LOCK_NL); | |
149 | } | |
150 | ||
7bcda714 GJ |
151 | /* |
152 | * An variation of dlm_lock_sync, which make lock request could | |
153 | * be interrupted | |
154 | */ | |
155 | static int dlm_lock_sync_interruptible(struct dlm_lock_resource *res, int mode, | |
156 | struct mddev *mddev) | |
157 | { | |
158 | int ret = 0; | |
159 | ||
160 | ret = dlm_lock(res->ls, mode, &res->lksb, | |
161 | res->flags, res->name, strlen(res->name), | |
162 | 0, sync_ast, res, res->bast); | |
163 | if (ret) | |
164 | return ret; | |
165 | ||
166 | wait_event(res->sync_locking, res->sync_locking_done | |
d6385db9 GJ |
167 | || kthread_should_stop() |
168 | || test_bit(MD_CLOSING, &mddev->flags)); | |
7bcda714 GJ |
169 | if (!res->sync_locking_done) { |
170 | /* | |
171 | * the convert queue contains the lock request when request is | |
172 | * interrupted, and sync_ast could still be run, so need to | |
173 | * cancel the request and reset completion | |
174 | */ | |
175 | ret = dlm_unlock(res->ls, res->lksb.sb_lkid, DLM_LKF_CANCEL, | |
176 | &res->lksb, res); | |
177 | res->sync_locking_done = false; | |
178 | if (unlikely(ret != 0)) | |
179 | pr_info("failed to cancel previous lock request " | |
180 | "%s return %d\n", res->name, ret); | |
181 | return -EPERM; | |
182 | } else | |
183 | res->sync_locking_done = false; | |
184 | if (res->lksb.sb_status == 0) | |
185 | res->mode = mode; | |
186 | return res->lksb.sb_status; | |
187 | } | |
188 | ||
c4ce867f | 189 | static struct dlm_lock_resource *lockres_init(struct mddev *mddev, |
47741b7c GR |
190 | char *name, void (*bastfn)(void *arg, int mode), int with_lvb) |
191 | { | |
192 | struct dlm_lock_resource *res = NULL; | |
193 | int ret, namelen; | |
c4ce867f | 194 | struct md_cluster_info *cinfo = mddev->cluster_info; |
47741b7c GR |
195 | |
196 | res = kzalloc(sizeof(struct dlm_lock_resource), GFP_KERNEL); | |
197 | if (!res) | |
198 | return NULL; | |
fccb60a4 GJ |
199 | init_waitqueue_head(&res->sync_locking); |
200 | res->sync_locking_done = false; | |
c4ce867f GR |
201 | res->ls = cinfo->lockspace; |
202 | res->mddev = mddev; | |
dbb64f86 | 203 | res->mode = DLM_LOCK_IV; |
47741b7c GR |
204 | namelen = strlen(name); |
205 | res->name = kzalloc(namelen + 1, GFP_KERNEL); | |
206 | if (!res->name) { | |
207 | pr_err("md-cluster: Unable to allocate resource name for resource %s\n", name); | |
208 | goto out_err; | |
209 | } | |
210 | strlcpy(res->name, name, namelen + 1); | |
211 | if (with_lvb) { | |
212 | res->lksb.sb_lvbptr = kzalloc(LVB_SIZE, GFP_KERNEL); | |
213 | if (!res->lksb.sb_lvbptr) { | |
214 | pr_err("md-cluster: Unable to allocate LVB for resource %s\n", name); | |
215 | goto out_err; | |
216 | } | |
217 | res->flags = DLM_LKF_VALBLK; | |
218 | } | |
219 | ||
220 | if (bastfn) | |
221 | res->bast = bastfn; | |
222 | ||
223 | res->flags |= DLM_LKF_EXPEDITE; | |
224 | ||
225 | ret = dlm_lock_sync(res, DLM_LOCK_NL); | |
226 | if (ret) { | |
227 | pr_err("md-cluster: Unable to lock NL on new lock resource %s\n", name); | |
228 | goto out_err; | |
229 | } | |
230 | res->flags &= ~DLM_LKF_EXPEDITE; | |
231 | res->flags |= DLM_LKF_CONVERT; | |
232 | ||
233 | return res; | |
234 | out_err: | |
235 | kfree(res->lksb.sb_lvbptr); | |
236 | kfree(res->name); | |
237 | kfree(res); | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | static void lockres_free(struct dlm_lock_resource *res) | |
242 | { | |
400cb454 | 243 | int ret = 0; |
b5ef5678 | 244 | |
47741b7c GR |
245 | if (!res) |
246 | return; | |
247 | ||
400cb454 GJ |
248 | /* |
249 | * use FORCEUNLOCK flag, so we can unlock even the lock is on the | |
250 | * waiting or convert queue | |
251 | */ | |
252 | ret = dlm_unlock(res->ls, res->lksb.sb_lkid, DLM_LKF_FORCEUNLOCK, | |
253 | &res->lksb, res); | |
254 | if (unlikely(ret != 0)) | |
255 | pr_err("failed to unlock %s return %d\n", res->name, ret); | |
256 | else | |
fccb60a4 | 257 | wait_event(res->sync_locking, res->sync_locking_done); |
47741b7c GR |
258 | |
259 | kfree(res->name); | |
260 | kfree(res->lksb.sb_lvbptr); | |
261 | kfree(res); | |
262 | } | |
8e854e9c | 263 | |
30661b49 N |
264 | static void add_resync_info(struct dlm_lock_resource *lockres, |
265 | sector_t lo, sector_t hi) | |
96ae923a GR |
266 | { |
267 | struct resync_info *ri; | |
268 | ||
269 | ri = (struct resync_info *)lockres->lksb.sb_lvbptr; | |
270 | ri->lo = cpu_to_le64(lo); | |
271 | ri->hi = cpu_to_le64(hi); | |
272 | } | |
273 | ||
274 | static struct suspend_info *read_resync_info(struct mddev *mddev, struct dlm_lock_resource *lockres) | |
275 | { | |
276 | struct resync_info ri; | |
277 | struct suspend_info *s = NULL; | |
278 | sector_t hi = 0; | |
279 | ||
280 | dlm_lock_sync(lockres, DLM_LOCK_CR); | |
281 | memcpy(&ri, lockres->lksb.sb_lvbptr, sizeof(struct resync_info)); | |
282 | hi = le64_to_cpu(ri.hi); | |
cf97a348 | 283 | if (hi > 0) { |
96ae923a GR |
284 | s = kzalloc(sizeof(struct suspend_info), GFP_KERNEL); |
285 | if (!s) | |
286 | goto out; | |
287 | s->hi = hi; | |
288 | s->lo = le64_to_cpu(ri.lo); | |
289 | } | |
290 | dlm_unlock_sync(lockres); | |
291 | out: | |
292 | return s; | |
293 | } | |
294 | ||
6dc69c9c | 295 | static void recover_bitmaps(struct md_thread *thread) |
e94987db GR |
296 | { |
297 | struct mddev *mddev = thread->mddev; | |
298 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
299 | struct dlm_lock_resource *bm_lockres; | |
300 | char str[64]; | |
301 | int slot, ret; | |
302 | struct suspend_info *s, *tmp; | |
303 | sector_t lo, hi; | |
304 | ||
305 | while (cinfo->recovery_map) { | |
306 | slot = fls64((u64)cinfo->recovery_map) - 1; | |
307 | ||
e94987db GR |
308 | snprintf(str, 64, "bitmap%04d", slot); |
309 | bm_lockres = lockres_init(mddev, str, NULL, 1); | |
310 | if (!bm_lockres) { | |
311 | pr_err("md-cluster: Cannot initialize bitmaps\n"); | |
312 | goto clear_bit; | |
313 | } | |
314 | ||
7bcda714 | 315 | ret = dlm_lock_sync_interruptible(bm_lockres, DLM_LOCK_PW, mddev); |
e94987db GR |
316 | if (ret) { |
317 | pr_err("md-cluster: Could not DLM lock %s: %d\n", | |
318 | str, ret); | |
319 | goto clear_bit; | |
320 | } | |
e64e4018 | 321 | ret = md_bitmap_copy_from_slot(mddev, slot, &lo, &hi, true); |
4b26a08a | 322 | if (ret) { |
e94987db | 323 | pr_err("md-cluster: Could not copy data from bitmap %d\n", slot); |
e3f924d3 | 324 | goto clear_bit; |
4b26a08a | 325 | } |
010228e4 GJ |
326 | |
327 | /* Clear suspend_area associated with the bitmap */ | |
328 | spin_lock_irq(&cinfo->suspend_lock); | |
329 | list_for_each_entry_safe(s, tmp, &cinfo->suspend_list, list) | |
330 | if (slot == s->slot) { | |
331 | list_del(&s->list); | |
332 | kfree(s); | |
333 | } | |
334 | spin_unlock_irq(&cinfo->suspend_lock); | |
335 | ||
4b26a08a | 336 | if (hi > 0) { |
4b26a08a GR |
337 | if (lo < mddev->recovery_cp) |
338 | mddev->recovery_cp = lo; | |
eb315cd0 GJ |
339 | /* wake up thread to continue resync in case resync |
340 | * is not finished */ | |
341 | if (mddev->recovery_cp != MaxSector) { | |
0357ba27 GJ |
342 | /* |
343 | * clear the REMOTE flag since we will launch | |
344 | * resync thread in current node. | |
345 | */ | |
346 | clear_bit(MD_RESYNCING_REMOTE, | |
347 | &mddev->recovery); | |
348 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
349 | md_wakeup_thread(mddev->thread); | |
eb315cd0 | 350 | } |
4b26a08a | 351 | } |
e94987db | 352 | clear_bit: |
4ac7a65f | 353 | lockres_free(bm_lockres); |
e94987db GR |
354 | clear_bit(slot, &cinfo->recovery_map); |
355 | } | |
356 | } | |
357 | ||
cf921cc1 GR |
358 | static void recover_prep(void *arg) |
359 | { | |
90382ed9 GR |
360 | struct mddev *mddev = arg; |
361 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
362 | set_bit(MD_CLUSTER_SUSPEND_READ_BALANCING, &cinfo->state); | |
cf921cc1 GR |
363 | } |
364 | ||
05cd0e51 | 365 | static void __recover_slot(struct mddev *mddev, int slot) |
cf921cc1 | 366 | { |
cf921cc1 GR |
367 | struct md_cluster_info *cinfo = mddev->cluster_info; |
368 | ||
05cd0e51 | 369 | set_bit(slot, &cinfo->recovery_map); |
e94987db GR |
370 | if (!cinfo->recovery_thread) { |
371 | cinfo->recovery_thread = md_register_thread(recover_bitmaps, | |
372 | mddev, "recover"); | |
373 | if (!cinfo->recovery_thread) { | |
374 | pr_warn("md-cluster: Could not create recovery thread\n"); | |
375 | return; | |
376 | } | |
377 | } | |
378 | md_wakeup_thread(cinfo->recovery_thread); | |
cf921cc1 GR |
379 | } |
380 | ||
05cd0e51 GJ |
381 | static void recover_slot(void *arg, struct dlm_slot *slot) |
382 | { | |
383 | struct mddev *mddev = arg; | |
384 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
385 | ||
386 | pr_info("md-cluster: %s Node %d/%d down. My slot: %d. Initiating recovery.\n", | |
387 | mddev->bitmap_info.cluster_name, | |
388 | slot->nodeid, slot->slot, | |
389 | cinfo->slot_number); | |
390 | /* deduct one since dlm slot starts from one while the num of | |
391 | * cluster-md begins with 0 */ | |
392 | __recover_slot(mddev, slot->slot - 1); | |
393 | } | |
394 | ||
cf921cc1 GR |
395 | static void recover_done(void *arg, struct dlm_slot *slots, |
396 | int num_slots, int our_slot, | |
397 | uint32_t generation) | |
398 | { | |
399 | struct mddev *mddev = arg; | |
400 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
401 | ||
402 | cinfo->slot_number = our_slot; | |
eece075c GJ |
403 | /* completion is only need to be complete when node join cluster, |
404 | * it doesn't need to run during another node's failure */ | |
405 | if (test_bit(MD_CLUSTER_BEGIN_JOIN_CLUSTER, &cinfo->state)) { | |
406 | complete(&cinfo->completion); | |
407 | clear_bit(MD_CLUSTER_BEGIN_JOIN_CLUSTER, &cinfo->state); | |
408 | } | |
90382ed9 | 409 | clear_bit(MD_CLUSTER_SUSPEND_READ_BALANCING, &cinfo->state); |
cf921cc1 GR |
410 | } |
411 | ||
eece075c GJ |
412 | /* the ops is called when node join the cluster, and do lock recovery |
413 | * if node failure occurs */ | |
cf921cc1 GR |
414 | static const struct dlm_lockspace_ops md_ls_ops = { |
415 | .recover_prep = recover_prep, | |
416 | .recover_slot = recover_slot, | |
417 | .recover_done = recover_done, | |
418 | }; | |
419 | ||
4664680c GR |
420 | /* |
421 | * The BAST function for the ack lock resource | |
422 | * This function wakes up the receive thread in | |
423 | * order to receive and process the message. | |
424 | */ | |
425 | static void ack_bast(void *arg, int mode) | |
426 | { | |
2e2a7cd9 | 427 | struct dlm_lock_resource *res = arg; |
4664680c GR |
428 | struct md_cluster_info *cinfo = res->mddev->cluster_info; |
429 | ||
51e453ae GJ |
430 | if (mode == DLM_LOCK_EX) { |
431 | if (test_bit(MD_CLUSTER_ALREADY_IN_CLUSTER, &cinfo->state)) | |
432 | md_wakeup_thread(cinfo->recv_thread); | |
433 | else | |
434 | set_bit(MD_CLUSTER_PENDING_RECV_EVENT, &cinfo->state); | |
435 | } | |
4664680c GR |
436 | } |
437 | ||
e59721cc GR |
438 | static void __remove_suspend_info(struct md_cluster_info *cinfo, int slot) |
439 | { | |
440 | struct suspend_info *s, *tmp; | |
441 | ||
442 | list_for_each_entry_safe(s, tmp, &cinfo->suspend_list, list) | |
443 | if (slot == s->slot) { | |
e59721cc GR |
444 | list_del(&s->list); |
445 | kfree(s); | |
446 | break; | |
447 | } | |
448 | } | |
449 | ||
b8ca846e | 450 | static void remove_suspend_info(struct mddev *mddev, int slot) |
e59721cc | 451 | { |
b8ca846e | 452 | struct md_cluster_info *cinfo = mddev->cluster_info; |
b03e0ccb | 453 | mddev->pers->quiesce(mddev, 1); |
e59721cc GR |
454 | spin_lock_irq(&cinfo->suspend_lock); |
455 | __remove_suspend_info(cinfo, slot); | |
456 | spin_unlock_irq(&cinfo->suspend_lock); | |
b03e0ccb | 457 | mddev->pers->quiesce(mddev, 0); |
e59721cc GR |
458 | } |
459 | ||
460 | ||
9ed38ff5 | 461 | static void process_suspend_info(struct mddev *mddev, |
e59721cc GR |
462 | int slot, sector_t lo, sector_t hi) |
463 | { | |
9ed38ff5 | 464 | struct md_cluster_info *cinfo = mddev->cluster_info; |
e59721cc GR |
465 | struct suspend_info *s; |
466 | ||
467 | if (!hi) { | |
0357ba27 GJ |
468 | /* |
469 | * clear the REMOTE flag since resync or recovery is finished | |
470 | * in remote node. | |
471 | */ | |
472 | clear_bit(MD_RESYNCING_REMOTE, &mddev->recovery); | |
b8ca846e | 473 | remove_suspend_info(mddev, slot); |
c186b128 GR |
474 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); |
475 | md_wakeup_thread(mddev->thread); | |
e59721cc GR |
476 | return; |
477 | } | |
18c9ff7f GJ |
478 | |
479 | /* | |
480 | * The bitmaps are not same for different nodes | |
481 | * if RESYNCING is happening in one node, then | |
482 | * the node which received the RESYNCING message | |
483 | * probably will perform resync with the region | |
484 | * [lo, hi] again, so we could reduce resync time | |
485 | * a lot if we can ensure that the bitmaps among | |
486 | * different nodes are match up well. | |
487 | * | |
488 | * sync_low/hi is used to record the region which | |
489 | * arrived in the previous RESYNCING message, | |
490 | * | |
491 | * Call bitmap_sync_with_cluster to clear | |
492 | * NEEDED_MASK and set RESYNC_MASK since | |
493 | * resync thread is running in another node, | |
494 | * so we don't need to do the resync again | |
495 | * with the same section */ | |
e64e4018 | 496 | md_bitmap_sync_with_cluster(mddev, cinfo->sync_low, cinfo->sync_hi, lo, hi); |
18c9ff7f GJ |
497 | cinfo->sync_low = lo; |
498 | cinfo->sync_hi = hi; | |
499 | ||
e59721cc GR |
500 | s = kzalloc(sizeof(struct suspend_info), GFP_KERNEL); |
501 | if (!s) | |
502 | return; | |
503 | s->slot = slot; | |
504 | s->lo = lo; | |
505 | s->hi = hi; | |
9ed38ff5 | 506 | mddev->pers->quiesce(mddev, 1); |
e59721cc GR |
507 | spin_lock_irq(&cinfo->suspend_lock); |
508 | /* Remove existing entry (if exists) before adding */ | |
509 | __remove_suspend_info(cinfo, slot); | |
510 | list_add(&s->list, &cinfo->suspend_list); | |
511 | spin_unlock_irq(&cinfo->suspend_lock); | |
b03e0ccb | 512 | mddev->pers->quiesce(mddev, 0); |
e59721cc GR |
513 | } |
514 | ||
1aee41f6 GR |
515 | static void process_add_new_disk(struct mddev *mddev, struct cluster_msg *cmsg) |
516 | { | |
517 | char disk_uuid[64]; | |
518 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
519 | char event_name[] = "EVENT=ADD_DEVICE"; | |
520 | char raid_slot[16]; | |
521 | char *envp[] = {event_name, disk_uuid, raid_slot, NULL}; | |
522 | int len; | |
523 | ||
524 | len = snprintf(disk_uuid, 64, "DEVICE_UUID="); | |
b89f704a | 525 | sprintf(disk_uuid + len, "%pU", cmsg->uuid); |
faeff83f | 526 | snprintf(raid_slot, 16, "RAID_DISK=%d", le32_to_cpu(cmsg->raid_slot)); |
1aee41f6 GR |
527 | pr_info("%s:%d Sending kobject change with %s and %s\n", __func__, __LINE__, disk_uuid, raid_slot); |
528 | init_completion(&cinfo->newdisk_completion); | |
fa8259da | 529 | set_bit(MD_CLUSTER_WAITING_FOR_NEWDISK, &cinfo->state); |
1aee41f6 GR |
530 | kobject_uevent_env(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE, envp); |
531 | wait_for_completion_timeout(&cinfo->newdisk_completion, | |
532 | NEW_DEV_TIMEOUT); | |
fa8259da | 533 | clear_bit(MD_CLUSTER_WAITING_FOR_NEWDISK, &cinfo->state); |
1aee41f6 GR |
534 | } |
535 | ||
536 | ||
537 | static void process_metadata_update(struct mddev *mddev, struct cluster_msg *msg) | |
538 | { | |
0ba95977 | 539 | int got_lock = 0; |
1aee41f6 | 540 | struct md_cluster_info *cinfo = mddev->cluster_info; |
15858fa5 | 541 | mddev->good_device_nr = le32_to_cpu(msg->raid_slot); |
0ba95977 | 542 | |
1aee41f6 | 543 | dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_CR); |
0ba95977 GJ |
544 | wait_event(mddev->thread->wqueue, |
545 | (got_lock = mddev_trylock(mddev)) || | |
546 | test_bit(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state)); | |
547 | md_reload_sb(mddev, mddev->good_device_nr); | |
548 | if (got_lock) | |
549 | mddev_unlock(mddev); | |
1aee41f6 GR |
550 | } |
551 | ||
88bcfef7 GR |
552 | static void process_remove_disk(struct mddev *mddev, struct cluster_msg *msg) |
553 | { | |
5f0aa21d | 554 | struct md_rdev *rdev; |
88bcfef7 | 555 | |
5f0aa21d GJ |
556 | rcu_read_lock(); |
557 | rdev = md_find_rdev_nr_rcu(mddev, le32_to_cpu(msg->raid_slot)); | |
659b254f GJ |
558 | if (rdev) { |
559 | set_bit(ClusterRemove, &rdev->flags); | |
560 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
561 | md_wakeup_thread(mddev->thread); | |
562 | } | |
88bcfef7 | 563 | else |
faeff83f GJ |
564 | pr_warn("%s: %d Could not find disk(%d) to REMOVE\n", |
565 | __func__, __LINE__, le32_to_cpu(msg->raid_slot)); | |
5f0aa21d | 566 | rcu_read_unlock(); |
88bcfef7 GR |
567 | } |
568 | ||
97f6cd39 GR |
569 | static void process_readd_disk(struct mddev *mddev, struct cluster_msg *msg) |
570 | { | |
5f0aa21d | 571 | struct md_rdev *rdev; |
97f6cd39 | 572 | |
5f0aa21d GJ |
573 | rcu_read_lock(); |
574 | rdev = md_find_rdev_nr_rcu(mddev, le32_to_cpu(msg->raid_slot)); | |
97f6cd39 GR |
575 | if (rdev && test_bit(Faulty, &rdev->flags)) |
576 | clear_bit(Faulty, &rdev->flags); | |
577 | else | |
faeff83f GJ |
578 | pr_warn("%s: %d Could not find disk(%d) which is faulty", |
579 | __func__, __LINE__, le32_to_cpu(msg->raid_slot)); | |
5f0aa21d | 580 | rcu_read_unlock(); |
97f6cd39 GR |
581 | } |
582 | ||
1fa9a1ad | 583 | static int process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg) |
4664680c | 584 | { |
1fa9a1ad GJ |
585 | int ret = 0; |
586 | ||
256f5b24 GJ |
587 | if (WARN(mddev->cluster_info->slot_number - 1 == le32_to_cpu(msg->slot), |
588 | "node %d received it's own msg\n", le32_to_cpu(msg->slot))) | |
1fa9a1ad | 589 | return -1; |
cf97a348 | 590 | switch (le32_to_cpu(msg->type)) { |
4664680c | 591 | case METADATA_UPDATED: |
1aee41f6 | 592 | process_metadata_update(mddev, msg); |
4664680c | 593 | break; |
7da3d203 GJ |
594 | case CHANGE_CAPACITY: |
595 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
596 | revalidate_disk(mddev->gendisk); | |
597 | break; | |
4664680c | 598 | case RESYNCING: |
0357ba27 | 599 | set_bit(MD_RESYNCING_REMOTE, &mddev->recovery); |
cf97a348 GJ |
600 | process_suspend_info(mddev, le32_to_cpu(msg->slot), |
601 | le64_to_cpu(msg->low), | |
602 | le64_to_cpu(msg->high)); | |
4664680c | 603 | break; |
1aee41f6 | 604 | case NEWDISK: |
1aee41f6 | 605 | process_add_new_disk(mddev, msg); |
88bcfef7 GR |
606 | break; |
607 | case REMOVE: | |
88bcfef7 GR |
608 | process_remove_disk(mddev, msg); |
609 | break; | |
97f6cd39 | 610 | case RE_ADD: |
97f6cd39 GR |
611 | process_readd_disk(mddev, msg); |
612 | break; | |
dc737d7c | 613 | case BITMAP_NEEDS_SYNC: |
cf97a348 | 614 | __recover_slot(mddev, le32_to_cpu(msg->slot)); |
dc737d7c | 615 | break; |
afd75628 GJ |
616 | case BITMAP_RESIZE: |
617 | if (le64_to_cpu(msg->high) != mddev->pers->size(mddev, 0, 0)) | |
618 | ret = md_bitmap_resize(mddev->bitmap, | |
619 | le64_to_cpu(msg->high), 0, 0); | |
620 | break; | |
88bcfef7 | 621 | default: |
1fa9a1ad | 622 | ret = -1; |
88bcfef7 GR |
623 | pr_warn("%s:%d Received unknown message from %d\n", |
624 | __func__, __LINE__, msg->slot); | |
09dd1af2 | 625 | } |
1fa9a1ad | 626 | return ret; |
4664680c GR |
627 | } |
628 | ||
629 | /* | |
630 | * thread for receiving message | |
631 | */ | |
632 | static void recv_daemon(struct md_thread *thread) | |
633 | { | |
634 | struct md_cluster_info *cinfo = thread->mddev->cluster_info; | |
635 | struct dlm_lock_resource *ack_lockres = cinfo->ack_lockres; | |
636 | struct dlm_lock_resource *message_lockres = cinfo->message_lockres; | |
637 | struct cluster_msg msg; | |
b5ef5678 | 638 | int ret; |
4664680c | 639 | |
8b9277c8 | 640 | mutex_lock(&cinfo->recv_mutex); |
4664680c GR |
641 | /*get CR on Message*/ |
642 | if (dlm_lock_sync(message_lockres, DLM_LOCK_CR)) { | |
643 | pr_err("md/raid1:failed to get CR on MESSAGE\n"); | |
8b9277c8 | 644 | mutex_unlock(&cinfo->recv_mutex); |
4664680c GR |
645 | return; |
646 | } | |
647 | ||
648 | /* read lvb and wake up thread to process this message_lockres */ | |
649 | memcpy(&msg, message_lockres->lksb.sb_lvbptr, sizeof(struct cluster_msg)); | |
1fa9a1ad GJ |
650 | ret = process_recvd_msg(thread->mddev, &msg); |
651 | if (ret) | |
652 | goto out; | |
4664680c GR |
653 | |
654 | /*release CR on ack_lockres*/ | |
b5ef5678 GJ |
655 | ret = dlm_unlock_sync(ack_lockres); |
656 | if (unlikely(ret != 0)) | |
657 | pr_info("unlock ack failed return %d\n", ret); | |
66099bb0 | 658 | /*up-convert to PR on message_lockres*/ |
b5ef5678 GJ |
659 | ret = dlm_lock_sync(message_lockres, DLM_LOCK_PR); |
660 | if (unlikely(ret != 0)) | |
661 | pr_info("lock PR on msg failed return %d\n", ret); | |
4664680c | 662 | /*get CR on ack_lockres again*/ |
b5ef5678 GJ |
663 | ret = dlm_lock_sync(ack_lockres, DLM_LOCK_CR); |
664 | if (unlikely(ret != 0)) | |
665 | pr_info("lock CR on ack failed return %d\n", ret); | |
1fa9a1ad | 666 | out: |
4664680c | 667 | /*release CR on message_lockres*/ |
b5ef5678 GJ |
668 | ret = dlm_unlock_sync(message_lockres); |
669 | if (unlikely(ret != 0)) | |
670 | pr_info("unlock msg failed return %d\n", ret); | |
8b9277c8 | 671 | mutex_unlock(&cinfo->recv_mutex); |
4664680c GR |
672 | } |
673 | ||
8b9277c8 | 674 | /* lock_token() |
601b515c GR |
675 | * Takes the lock on the TOKEN lock resource so no other |
676 | * node can communicate while the operation is underway. | |
677 | */ | |
0ba95977 | 678 | static int lock_token(struct md_cluster_info *cinfo, bool mddev_locked) |
601b515c | 679 | { |
0ba95977 GJ |
680 | int error, set_bit = 0; |
681 | struct mddev *mddev = cinfo->mddev; | |
601b515c | 682 | |
0ba95977 GJ |
683 | /* |
684 | * If resync thread run after raid1d thread, then process_metadata_update | |
685 | * could not continue if raid1d held reconfig_mutex (and raid1d is blocked | |
686 | * since another node already got EX on Token and waitting the EX of Ack), | |
687 | * so let resync wake up thread in case flag is set. | |
688 | */ | |
689 | if (mddev_locked && !test_bit(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, | |
690 | &cinfo->state)) { | |
691 | error = test_and_set_bit_lock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, | |
692 | &cinfo->state); | |
693 | WARN_ON_ONCE(error); | |
694 | md_wakeup_thread(mddev->thread); | |
695 | set_bit = 1; | |
696 | } | |
601b515c | 697 | error = dlm_lock_sync(cinfo->token_lockres, DLM_LOCK_EX); |
0ba95977 GJ |
698 | if (set_bit) |
699 | clear_bit_unlock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state); | |
700 | ||
601b515c GR |
701 | if (error) |
702 | pr_err("md-cluster(%s:%d): failed to get EX on TOKEN (%d)\n", | |
703 | __func__, __LINE__, error); | |
8b9277c8 GJ |
704 | |
705 | /* Lock the receive sequence */ | |
706 | mutex_lock(&cinfo->recv_mutex); | |
601b515c GR |
707 | return error; |
708 | } | |
709 | ||
8b9277c8 GJ |
710 | /* lock_comm() |
711 | * Sets the MD_CLUSTER_SEND_LOCK bit to lock the send channel. | |
712 | */ | |
0ba95977 | 713 | static int lock_comm(struct md_cluster_info *cinfo, bool mddev_locked) |
8b9277c8 GJ |
714 | { |
715 | wait_event(cinfo->wait, | |
716 | !test_and_set_bit(MD_CLUSTER_SEND_LOCK, &cinfo->state)); | |
717 | ||
0ba95977 | 718 | return lock_token(cinfo, mddev_locked); |
8b9277c8 GJ |
719 | } |
720 | ||
601b515c GR |
721 | static void unlock_comm(struct md_cluster_info *cinfo) |
722 | { | |
dbb64f86 | 723 | WARN_ON(cinfo->token_lockres->mode != DLM_LOCK_EX); |
8b9277c8 | 724 | mutex_unlock(&cinfo->recv_mutex); |
601b515c | 725 | dlm_unlock_sync(cinfo->token_lockres); |
8b9277c8 GJ |
726 | clear_bit(MD_CLUSTER_SEND_LOCK, &cinfo->state); |
727 | wake_up(&cinfo->wait); | |
601b515c GR |
728 | } |
729 | ||
730 | /* __sendmsg() | |
731 | * This function performs the actual sending of the message. This function is | |
732 | * usually called after performing the encompassing operation | |
733 | * The function: | |
734 | * 1. Grabs the message lockresource in EX mode | |
735 | * 2. Copies the message to the message LVB | |
66099bb0 | 736 | * 3. Downconverts message lockresource to CW |
601b515c GR |
737 | * 4. Upconverts ack lock resource from CR to EX. This forces the BAST on other nodes |
738 | * and the other nodes read the message. The thread will wait here until all other | |
739 | * nodes have released ack lock resource. | |
740 | * 5. Downconvert ack lockresource to CR | |
741 | */ | |
742 | static int __sendmsg(struct md_cluster_info *cinfo, struct cluster_msg *cmsg) | |
743 | { | |
744 | int error; | |
745 | int slot = cinfo->slot_number - 1; | |
746 | ||
747 | cmsg->slot = cpu_to_le32(slot); | |
748 | /*get EX on Message*/ | |
749 | error = dlm_lock_sync(cinfo->message_lockres, DLM_LOCK_EX); | |
750 | if (error) { | |
751 | pr_err("md-cluster: failed to get EX on MESSAGE (%d)\n", error); | |
752 | goto failed_message; | |
753 | } | |
754 | ||
755 | memcpy(cinfo->message_lockres->lksb.sb_lvbptr, (void *)cmsg, | |
756 | sizeof(struct cluster_msg)); | |
66099bb0 GJ |
757 | /*down-convert EX to CW on Message*/ |
758 | error = dlm_lock_sync(cinfo->message_lockres, DLM_LOCK_CW); | |
601b515c | 759 | if (error) { |
66099bb0 | 760 | pr_err("md-cluster: failed to convert EX to CW on MESSAGE(%d)\n", |
601b515c | 761 | error); |
66099bb0 | 762 | goto failed_ack; |
601b515c GR |
763 | } |
764 | ||
765 | /*up-convert CR to EX on Ack*/ | |
766 | error = dlm_lock_sync(cinfo->ack_lockres, DLM_LOCK_EX); | |
767 | if (error) { | |
768 | pr_err("md-cluster: failed to convert CR to EX on ACK(%d)\n", | |
769 | error); | |
770 | goto failed_ack; | |
771 | } | |
772 | ||
773 | /*down-convert EX to CR on Ack*/ | |
774 | error = dlm_lock_sync(cinfo->ack_lockres, DLM_LOCK_CR); | |
775 | if (error) { | |
776 | pr_err("md-cluster: failed to convert EX to CR on ACK(%d)\n", | |
777 | error); | |
778 | goto failed_ack; | |
779 | } | |
780 | ||
781 | failed_ack: | |
b5ef5678 GJ |
782 | error = dlm_unlock_sync(cinfo->message_lockres); |
783 | if (unlikely(error != 0)) { | |
784 | pr_err("md-cluster: failed convert to NL on MESSAGE(%d)\n", | |
785 | error); | |
786 | /* in case the message can't be released due to some reason */ | |
787 | goto failed_ack; | |
788 | } | |
601b515c GR |
789 | failed_message: |
790 | return error; | |
791 | } | |
792 | ||
0ba95977 GJ |
793 | static int sendmsg(struct md_cluster_info *cinfo, struct cluster_msg *cmsg, |
794 | bool mddev_locked) | |
601b515c GR |
795 | { |
796 | int ret; | |
797 | ||
0ba95977 | 798 | lock_comm(cinfo, mddev_locked); |
601b515c GR |
799 | ret = __sendmsg(cinfo, cmsg); |
800 | unlock_comm(cinfo); | |
801 | return ret; | |
802 | } | |
803 | ||
96ae923a GR |
804 | static int gather_all_resync_info(struct mddev *mddev, int total_slots) |
805 | { | |
806 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
807 | int i, ret = 0; | |
808 | struct dlm_lock_resource *bm_lockres; | |
809 | struct suspend_info *s; | |
810 | char str[64]; | |
abb9b22a | 811 | sector_t lo, hi; |
96ae923a GR |
812 | |
813 | ||
814 | for (i = 0; i < total_slots; i++) { | |
815 | memset(str, '\0', 64); | |
816 | snprintf(str, 64, "bitmap%04d", i); | |
817 | bm_lockres = lockres_init(mddev, str, NULL, 1); | |
818 | if (!bm_lockres) | |
819 | return -ENOMEM; | |
4ac7a65f SL |
820 | if (i == (cinfo->slot_number - 1)) { |
821 | lockres_free(bm_lockres); | |
96ae923a | 822 | continue; |
4ac7a65f | 823 | } |
96ae923a GR |
824 | |
825 | bm_lockres->flags |= DLM_LKF_NOQUEUE; | |
826 | ret = dlm_lock_sync(bm_lockres, DLM_LOCK_PW); | |
827 | if (ret == -EAGAIN) { | |
96ae923a GR |
828 | s = read_resync_info(mddev, bm_lockres); |
829 | if (s) { | |
830 | pr_info("%s:%d Resync[%llu..%llu] in progress on %d\n", | |
831 | __func__, __LINE__, | |
832 | (unsigned long long) s->lo, | |
833 | (unsigned long long) s->hi, i); | |
834 | spin_lock_irq(&cinfo->suspend_lock); | |
835 | s->slot = i; | |
836 | list_add(&s->list, &cinfo->suspend_list); | |
837 | spin_unlock_irq(&cinfo->suspend_lock); | |
838 | } | |
839 | ret = 0; | |
840 | lockres_free(bm_lockres); | |
841 | continue; | |
842 | } | |
6e6d9f2c GJ |
843 | if (ret) { |
844 | lockres_free(bm_lockres); | |
96ae923a | 845 | goto out; |
6e6d9f2c | 846 | } |
abb9b22a GJ |
847 | |
848 | /* Read the disk bitmap sb and check if it needs recovery */ | |
e64e4018 | 849 | ret = md_bitmap_copy_from_slot(mddev, i, &lo, &hi, false); |
abb9b22a GJ |
850 | if (ret) { |
851 | pr_warn("md-cluster: Could not gather bitmaps from slot %d", i); | |
852 | lockres_free(bm_lockres); | |
853 | continue; | |
854 | } | |
855 | if ((hi > 0) && (lo < mddev->recovery_cp)) { | |
856 | set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); | |
857 | mddev->recovery_cp = lo; | |
858 | md_check_recovery(mddev); | |
859 | } | |
860 | ||
96ae923a GR |
861 | lockres_free(bm_lockres); |
862 | } | |
863 | out: | |
864 | return ret; | |
865 | } | |
866 | ||
edb39c9d GR |
867 | static int join(struct mddev *mddev, int nodes) |
868 | { | |
c4ce867f | 869 | struct md_cluster_info *cinfo; |
cf921cc1 | 870 | int ret, ops_rv; |
c4ce867f GR |
871 | char str[64]; |
872 | ||
c4ce867f GR |
873 | cinfo = kzalloc(sizeof(struct md_cluster_info), GFP_KERNEL); |
874 | if (!cinfo) | |
875 | return -ENOMEM; | |
876 | ||
9e3072e3 GJ |
877 | INIT_LIST_HEAD(&cinfo->suspend_list); |
878 | spin_lock_init(&cinfo->suspend_lock); | |
cf921cc1 | 879 | init_completion(&cinfo->completion); |
eece075c | 880 | set_bit(MD_CLUSTER_BEGIN_JOIN_CLUSTER, &cinfo->state); |
8b9277c8 GJ |
881 | init_waitqueue_head(&cinfo->wait); |
882 | mutex_init(&cinfo->recv_mutex); | |
cf921cc1 | 883 | |
cf921cc1 | 884 | mddev->cluster_info = cinfo; |
0ba95977 | 885 | cinfo->mddev = mddev; |
cf921cc1 | 886 | |
c4ce867f | 887 | memset(str, 0, 64); |
b89f704a | 888 | sprintf(str, "%pU", mddev->uuid); |
cf921cc1 GR |
889 | ret = dlm_new_lockspace(str, mddev->bitmap_info.cluster_name, |
890 | DLM_LSFL_FS, LVB_SIZE, | |
891 | &md_ls_ops, mddev, &ops_rv, &cinfo->lockspace); | |
c4ce867f GR |
892 | if (ret) |
893 | goto err; | |
cf921cc1 | 894 | wait_for_completion(&cinfo->completion); |
8c58f02e GJ |
895 | if (nodes < cinfo->slot_number) { |
896 | pr_err("md-cluster: Slot allotted(%d) is greater than available slots(%d).", | |
897 | cinfo->slot_number, nodes); | |
b97e9257 GR |
898 | ret = -ERANGE; |
899 | goto err; | |
900 | } | |
4664680c GR |
901 | /* Initiate the communication resources */ |
902 | ret = -ENOMEM; | |
903 | cinfo->recv_thread = md_register_thread(recv_daemon, mddev, "cluster_recv"); | |
904 | if (!cinfo->recv_thread) { | |
905 | pr_err("md-cluster: cannot allocate memory for recv_thread!\n"); | |
906 | goto err; | |
907 | } | |
908 | cinfo->message_lockres = lockres_init(mddev, "message", NULL, 1); | |
909 | if (!cinfo->message_lockres) | |
910 | goto err; | |
911 | cinfo->token_lockres = lockres_init(mddev, "token", NULL, 0); | |
912 | if (!cinfo->token_lockres) | |
913 | goto err; | |
1aee41f6 GR |
914 | cinfo->no_new_dev_lockres = lockres_init(mddev, "no-new-dev", NULL, 0); |
915 | if (!cinfo->no_new_dev_lockres) | |
916 | goto err; | |
917 | ||
1535212c GJ |
918 | ret = dlm_lock_sync(cinfo->token_lockres, DLM_LOCK_EX); |
919 | if (ret) { | |
920 | ret = -EAGAIN; | |
921 | pr_err("md-cluster: can't join cluster to avoid lock issue\n"); | |
922 | goto err; | |
923 | } | |
924 | cinfo->ack_lockres = lockres_init(mddev, "ack", ack_bast, 0); | |
0f6187db WY |
925 | if (!cinfo->ack_lockres) { |
926 | ret = -ENOMEM; | |
1535212c | 927 | goto err; |
0f6187db | 928 | } |
4664680c GR |
929 | /* get sync CR lock on ACK. */ |
930 | if (dlm_lock_sync(cinfo->ack_lockres, DLM_LOCK_CR)) | |
931 | pr_err("md-cluster: failed to get a sync CR lock on ACK!(%d)\n", | |
932 | ret); | |
1535212c | 933 | dlm_unlock_sync(cinfo->token_lockres); |
1aee41f6 GR |
934 | /* get sync CR lock on no-new-dev. */ |
935 | if (dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_CR)) | |
936 | pr_err("md-cluster: failed to get a sync CR lock on no-new-dev!(%d)\n", ret); | |
937 | ||
54519c5f GR |
938 | |
939 | pr_info("md-cluster: Joined cluster %s slot %d\n", str, cinfo->slot_number); | |
940 | snprintf(str, 64, "bitmap%04d", cinfo->slot_number - 1); | |
941 | cinfo->bitmap_lockres = lockres_init(mddev, str, NULL, 1); | |
0f6187db WY |
942 | if (!cinfo->bitmap_lockres) { |
943 | ret = -ENOMEM; | |
54519c5f | 944 | goto err; |
0f6187db | 945 | } |
54519c5f GR |
946 | if (dlm_lock_sync(cinfo->bitmap_lockres, DLM_LOCK_PW)) { |
947 | pr_err("Failed to get bitmap lock\n"); | |
948 | ret = -EINVAL; | |
949 | goto err; | |
950 | } | |
951 | ||
c186b128 | 952 | cinfo->resync_lockres = lockres_init(mddev, "resync", NULL, 0); |
0f6187db WY |
953 | if (!cinfo->resync_lockres) { |
954 | ret = -ENOMEM; | |
c186b128 | 955 | goto err; |
0f6187db | 956 | } |
c186b128 | 957 | |
edb39c9d | 958 | return 0; |
c4ce867f | 959 | err: |
0ba95977 | 960 | set_bit(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state); |
5b0fb33e GJ |
961 | md_unregister_thread(&cinfo->recovery_thread); |
962 | md_unregister_thread(&cinfo->recv_thread); | |
4664680c GR |
963 | lockres_free(cinfo->message_lockres); |
964 | lockres_free(cinfo->token_lockres); | |
965 | lockres_free(cinfo->ack_lockres); | |
1aee41f6 | 966 | lockres_free(cinfo->no_new_dev_lockres); |
c186b128 | 967 | lockres_free(cinfo->resync_lockres); |
96ae923a | 968 | lockres_free(cinfo->bitmap_lockres); |
c4ce867f GR |
969 | if (cinfo->lockspace) |
970 | dlm_release_lockspace(cinfo->lockspace, 2); | |
cf921cc1 | 971 | mddev->cluster_info = NULL; |
c4ce867f | 972 | kfree(cinfo); |
c4ce867f | 973 | return ret; |
edb39c9d GR |
974 | } |
975 | ||
51e453ae GJ |
976 | static void load_bitmaps(struct mddev *mddev, int total_slots) |
977 | { | |
978 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
979 | ||
980 | /* load all the node's bitmap info for resync */ | |
981 | if (gather_all_resync_info(mddev, total_slots)) | |
982 | pr_err("md-cluster: failed to gather all resyn infos\n"); | |
983 | set_bit(MD_CLUSTER_ALREADY_IN_CLUSTER, &cinfo->state); | |
984 | /* wake up recv thread in case something need to be handled */ | |
985 | if (test_and_clear_bit(MD_CLUSTER_PENDING_RECV_EVENT, &cinfo->state)) | |
986 | md_wakeup_thread(cinfo->recv_thread); | |
987 | } | |
988 | ||
09995411 GJ |
989 | static void resync_bitmap(struct mddev *mddev) |
990 | { | |
991 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
992 | struct cluster_msg cmsg = {0}; | |
993 | int err; | |
994 | ||
995 | cmsg.type = cpu_to_le32(BITMAP_NEEDS_SYNC); | |
0ba95977 | 996 | err = sendmsg(cinfo, &cmsg, 1); |
09995411 GJ |
997 | if (err) |
998 | pr_err("%s:%d: failed to send BITMAP_NEEDS_SYNC message (%d)\n", | |
999 | __func__, __LINE__, err); | |
1000 | } | |
1001 | ||
f6a2dc64 | 1002 | static void unlock_all_bitmaps(struct mddev *mddev); |
edb39c9d GR |
1003 | static int leave(struct mddev *mddev) |
1004 | { | |
c4ce867f GR |
1005 | struct md_cluster_info *cinfo = mddev->cluster_info; |
1006 | ||
1007 | if (!cinfo) | |
1008 | return 0; | |
09995411 GJ |
1009 | |
1010 | /* BITMAP_NEEDS_SYNC message should be sent when node | |
1011 | * is leaving the cluster with dirty bitmap, also we | |
1012 | * can only deliver it when dlm connection is available */ | |
1013 | if (cinfo->slot_number > 0 && mddev->recovery_cp != MaxSector) | |
1014 | resync_bitmap(mddev); | |
1015 | ||
0ba95977 | 1016 | set_bit(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state); |
e94987db | 1017 | md_unregister_thread(&cinfo->recovery_thread); |
4664680c GR |
1018 | md_unregister_thread(&cinfo->recv_thread); |
1019 | lockres_free(cinfo->message_lockres); | |
1020 | lockres_free(cinfo->token_lockres); | |
1021 | lockres_free(cinfo->ack_lockres); | |
1aee41f6 | 1022 | lockres_free(cinfo->no_new_dev_lockres); |
4ac7a65f | 1023 | lockres_free(cinfo->resync_lockres); |
54519c5f | 1024 | lockres_free(cinfo->bitmap_lockres); |
f6a2dc64 | 1025 | unlock_all_bitmaps(mddev); |
c4ce867f | 1026 | dlm_release_lockspace(cinfo->lockspace, 2); |
9c8043f3 | 1027 | kfree(cinfo); |
edb39c9d GR |
1028 | return 0; |
1029 | } | |
1030 | ||
cf921cc1 GR |
1031 | /* slot_number(): Returns the MD slot number to use |
1032 | * DLM starts the slot numbers from 1, wheras cluster-md | |
1033 | * wants the number to be from zero, so we deduct one | |
1034 | */ | |
1035 | static int slot_number(struct mddev *mddev) | |
1036 | { | |
1037 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1038 | ||
1039 | return cinfo->slot_number - 1; | |
1040 | } | |
1041 | ||
8b9277c8 GJ |
1042 | /* |
1043 | * Check if the communication is already locked, else lock the communication | |
1044 | * channel. | |
1045 | * If it is already locked, token is in EX mode, and hence lock_token() | |
1046 | * should not be called. | |
1047 | */ | |
293467aa GR |
1048 | static int metadata_update_start(struct mddev *mddev) |
1049 | { | |
8b9277c8 | 1050 | struct md_cluster_info *cinfo = mddev->cluster_info; |
0ba95977 GJ |
1051 | int ret; |
1052 | ||
1053 | /* | |
1054 | * metadata_update_start is always called with the protection of | |
1055 | * reconfig_mutex, so set WAITING_FOR_TOKEN here. | |
1056 | */ | |
1057 | ret = test_and_set_bit_lock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, | |
1058 | &cinfo->state); | |
1059 | WARN_ON_ONCE(ret); | |
1060 | md_wakeup_thread(mddev->thread); | |
8b9277c8 GJ |
1061 | |
1062 | wait_event(cinfo->wait, | |
1063 | !test_and_set_bit(MD_CLUSTER_SEND_LOCK, &cinfo->state) || | |
1064 | test_and_clear_bit(MD_CLUSTER_SEND_LOCKED_ALREADY, &cinfo->state)); | |
1065 | ||
1066 | /* If token is already locked, return 0 */ | |
0ba95977 GJ |
1067 | if (cinfo->token_lockres->mode == DLM_LOCK_EX) { |
1068 | clear_bit_unlock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state); | |
8b9277c8 | 1069 | return 0; |
0ba95977 | 1070 | } |
8b9277c8 | 1071 | |
0ba95977 GJ |
1072 | ret = lock_token(cinfo, 1); |
1073 | clear_bit_unlock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state); | |
1074 | return ret; | |
293467aa GR |
1075 | } |
1076 | ||
1077 | static int metadata_update_finish(struct mddev *mddev) | |
1078 | { | |
1079 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1080 | struct cluster_msg cmsg; | |
70bcecdb GR |
1081 | struct md_rdev *rdev; |
1082 | int ret = 0; | |
ba2746b0 | 1083 | int raid_slot = -1; |
293467aa GR |
1084 | |
1085 | memset(&cmsg, 0, sizeof(cmsg)); | |
1086 | cmsg.type = cpu_to_le32(METADATA_UPDATED); | |
70bcecdb GR |
1087 | /* Pick up a good active device number to send. |
1088 | */ | |
1089 | rdev_for_each(rdev, mddev) | |
1090 | if (rdev->raid_disk > -1 && !test_bit(Faulty, &rdev->flags)) { | |
ba2746b0 | 1091 | raid_slot = rdev->desc_nr; |
70bcecdb GR |
1092 | break; |
1093 | } | |
ba2746b0 N |
1094 | if (raid_slot >= 0) { |
1095 | cmsg.raid_slot = cpu_to_le32(raid_slot); | |
70bcecdb | 1096 | ret = __sendmsg(cinfo, &cmsg); |
ba2746b0 | 1097 | } else |
70bcecdb | 1098 | pr_warn("md-cluster: No good device id found to send\n"); |
8b9277c8 | 1099 | clear_bit(MD_CLUSTER_SEND_LOCKED_ALREADY, &cinfo->state); |
293467aa GR |
1100 | unlock_comm(cinfo); |
1101 | return ret; | |
1102 | } | |
1103 | ||
dbb64f86 | 1104 | static void metadata_update_cancel(struct mddev *mddev) |
293467aa GR |
1105 | { |
1106 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
8b9277c8 | 1107 | clear_bit(MD_CLUSTER_SEND_LOCKED_ALREADY, &cinfo->state); |
dbb64f86 | 1108 | unlock_comm(cinfo); |
293467aa GR |
1109 | } |
1110 | ||
afd75628 GJ |
1111 | static int update_bitmap_size(struct mddev *mddev, sector_t size) |
1112 | { | |
1113 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1114 | struct cluster_msg cmsg = {0}; | |
1115 | int ret; | |
1116 | ||
1117 | cmsg.type = cpu_to_le32(BITMAP_RESIZE); | |
1118 | cmsg.high = cpu_to_le64(size); | |
1119 | ret = sendmsg(cinfo, &cmsg, 0); | |
1120 | if (ret) | |
1121 | pr_err("%s:%d: failed to send BITMAP_RESIZE message (%d)\n", | |
1122 | __func__, __LINE__, ret); | |
1123 | return ret; | |
1124 | } | |
1125 | ||
1126 | static int resize_bitmaps(struct mddev *mddev, sector_t newsize, sector_t oldsize) | |
1127 | { | |
1128 | struct bitmap_counts *counts; | |
1129 | char str[64]; | |
1130 | struct dlm_lock_resource *bm_lockres; | |
1131 | struct bitmap *bitmap = mddev->bitmap; | |
1132 | unsigned long my_pages = bitmap->counts.pages; | |
1133 | int i, rv; | |
1134 | ||
1135 | /* | |
1136 | * We need to ensure all the nodes can grow to a larger | |
1137 | * bitmap size before make the reshaping. | |
1138 | */ | |
1139 | rv = update_bitmap_size(mddev, newsize); | |
1140 | if (rv) | |
1141 | return rv; | |
1142 | ||
1143 | for (i = 0; i < mddev->bitmap_info.nodes; i++) { | |
1144 | if (i == md_cluster_ops->slot_number(mddev)) | |
1145 | continue; | |
1146 | ||
1147 | bitmap = get_bitmap_from_slot(mddev, i); | |
1148 | if (IS_ERR(bitmap)) { | |
1149 | pr_err("can't get bitmap from slot %d\n", i); | |
1150 | goto out; | |
1151 | } | |
1152 | counts = &bitmap->counts; | |
1153 | ||
1154 | /* | |
1155 | * If we can hold the bitmap lock of one node then | |
1156 | * the slot is not occupied, update the pages. | |
1157 | */ | |
1158 | snprintf(str, 64, "bitmap%04d", i); | |
1159 | bm_lockres = lockres_init(mddev, str, NULL, 1); | |
1160 | if (!bm_lockres) { | |
1161 | pr_err("Cannot initialize %s lock\n", str); | |
1162 | goto out; | |
1163 | } | |
1164 | bm_lockres->flags |= DLM_LKF_NOQUEUE; | |
1165 | rv = dlm_lock_sync(bm_lockres, DLM_LOCK_PW); | |
1166 | if (!rv) | |
1167 | counts->pages = my_pages; | |
1168 | lockres_free(bm_lockres); | |
1169 | ||
1170 | if (my_pages != counts->pages) | |
1171 | /* | |
1172 | * Let's revert the bitmap size if one node | |
1173 | * can't resize bitmap | |
1174 | */ | |
1175 | goto out; | |
1176 | } | |
1177 | ||
1178 | return 0; | |
1179 | out: | |
1180 | md_bitmap_free(bitmap); | |
1181 | update_bitmap_size(mddev, oldsize); | |
1182 | return -1; | |
1183 | } | |
1184 | ||
b98938d1 GJ |
1185 | /* |
1186 | * return 0 if all the bitmaps have the same sync_size | |
1187 | */ | |
7a57157a | 1188 | static int cluster_check_sync_size(struct mddev *mddev) |
b98938d1 GJ |
1189 | { |
1190 | int i, rv; | |
1191 | bitmap_super_t *sb; | |
1192 | unsigned long my_sync_size, sync_size = 0; | |
1193 | int node_num = mddev->bitmap_info.nodes; | |
1194 | int current_slot = md_cluster_ops->slot_number(mddev); | |
1195 | struct bitmap *bitmap = mddev->bitmap; | |
1196 | char str[64]; | |
1197 | struct dlm_lock_resource *bm_lockres; | |
1198 | ||
1199 | sb = kmap_atomic(bitmap->storage.sb_page); | |
1200 | my_sync_size = sb->sync_size; | |
1201 | kunmap_atomic(sb); | |
1202 | ||
1203 | for (i = 0; i < node_num; i++) { | |
1204 | if (i == current_slot) | |
1205 | continue; | |
1206 | ||
1207 | bitmap = get_bitmap_from_slot(mddev, i); | |
1208 | if (IS_ERR(bitmap)) { | |
1209 | pr_err("can't get bitmap from slot %d\n", i); | |
1210 | return -1; | |
1211 | } | |
1212 | ||
1213 | /* | |
1214 | * If we can hold the bitmap lock of one node then | |
1215 | * the slot is not occupied, update the sb. | |
1216 | */ | |
1217 | snprintf(str, 64, "bitmap%04d", i); | |
1218 | bm_lockres = lockres_init(mddev, str, NULL, 1); | |
1219 | if (!bm_lockres) { | |
1220 | pr_err("md-cluster: Cannot initialize %s\n", str); | |
e64e4018 | 1221 | md_bitmap_free(bitmap); |
b98938d1 GJ |
1222 | return -1; |
1223 | } | |
1224 | bm_lockres->flags |= DLM_LKF_NOQUEUE; | |
1225 | rv = dlm_lock_sync(bm_lockres, DLM_LOCK_PW); | |
1226 | if (!rv) | |
e64e4018 | 1227 | md_bitmap_update_sb(bitmap); |
b98938d1 GJ |
1228 | lockres_free(bm_lockres); |
1229 | ||
1230 | sb = kmap_atomic(bitmap->storage.sb_page); | |
1231 | if (sync_size == 0) | |
1232 | sync_size = sb->sync_size; | |
1233 | else if (sync_size != sb->sync_size) { | |
1234 | kunmap_atomic(sb); | |
e64e4018 | 1235 | md_bitmap_free(bitmap); |
b98938d1 GJ |
1236 | return -1; |
1237 | } | |
1238 | kunmap_atomic(sb); | |
e64e4018 | 1239 | md_bitmap_free(bitmap); |
b98938d1 GJ |
1240 | } |
1241 | ||
1242 | return (my_sync_size == sync_size) ? 0 : -1; | |
1243 | } | |
1244 | ||
818da59f GJ |
1245 | /* |
1246 | * Update the size for cluster raid is a little more complex, we perform it | |
1247 | * by the steps: | |
1248 | * 1. hold token lock and update superblock in initiator node. | |
1249 | * 2. send METADATA_UPDATED msg to other nodes. | |
1250 | * 3. The initiator node continues to check each bitmap's sync_size, if all | |
1251 | * bitmaps have the same value of sync_size, then we can set capacity and | |
1252 | * let other nodes to perform it. If one node can't update sync_size | |
1253 | * accordingly, we need to revert to previous value. | |
1254 | */ | |
1255 | static void update_size(struct mddev *mddev, sector_t old_dev_sectors) | |
1256 | { | |
1257 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1258 | struct cluster_msg cmsg; | |
1259 | struct md_rdev *rdev; | |
1260 | int ret = 0; | |
1261 | int raid_slot = -1; | |
1262 | ||
1263 | md_update_sb(mddev, 1); | |
1264 | lock_comm(cinfo, 1); | |
1265 | ||
1266 | memset(&cmsg, 0, sizeof(cmsg)); | |
1267 | cmsg.type = cpu_to_le32(METADATA_UPDATED); | |
1268 | rdev_for_each(rdev, mddev) | |
1269 | if (rdev->raid_disk >= 0 && !test_bit(Faulty, &rdev->flags)) { | |
1270 | raid_slot = rdev->desc_nr; | |
1271 | break; | |
1272 | } | |
1273 | if (raid_slot >= 0) { | |
1274 | cmsg.raid_slot = cpu_to_le32(raid_slot); | |
1275 | /* | |
1276 | * We can only change capiticy after all the nodes can do it, | |
1277 | * so need to wait after other nodes already received the msg | |
1278 | * and handled the change | |
1279 | */ | |
1280 | ret = __sendmsg(cinfo, &cmsg); | |
1281 | if (ret) { | |
1282 | pr_err("%s:%d: failed to send METADATA_UPDATED msg\n", | |
1283 | __func__, __LINE__); | |
1284 | unlock_comm(cinfo); | |
1285 | return; | |
1286 | } | |
1287 | } else { | |
1288 | pr_err("md-cluster: No good device id found to send\n"); | |
1289 | unlock_comm(cinfo); | |
1290 | return; | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * check the sync_size from other node's bitmap, if sync_size | |
1295 | * have already updated in other nodes as expected, send an | |
1296 | * empty metadata msg to permit the change of capacity | |
1297 | */ | |
1298 | if (cluster_check_sync_size(mddev) == 0) { | |
1299 | memset(&cmsg, 0, sizeof(cmsg)); | |
1300 | cmsg.type = cpu_to_le32(CHANGE_CAPACITY); | |
1301 | ret = __sendmsg(cinfo, &cmsg); | |
1302 | if (ret) | |
1303 | pr_err("%s:%d: failed to send CHANGE_CAPACITY msg\n", | |
1304 | __func__, __LINE__); | |
1305 | set_capacity(mddev->gendisk, mddev->array_sectors); | |
1306 | revalidate_disk(mddev->gendisk); | |
1307 | } else { | |
1308 | /* revert to previous sectors */ | |
1309 | ret = mddev->pers->resize(mddev, old_dev_sectors); | |
1310 | if (!ret) | |
1311 | revalidate_disk(mddev->gendisk); | |
1312 | ret = __sendmsg(cinfo, &cmsg); | |
1313 | if (ret) | |
1314 | pr_err("%s:%d: failed to send METADATA_UPDATED msg\n", | |
1315 | __func__, __LINE__); | |
1316 | } | |
1317 | unlock_comm(cinfo); | |
1318 | } | |
1319 | ||
c186b128 GR |
1320 | static int resync_start(struct mddev *mddev) |
1321 | { | |
1322 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
d6385db9 | 1323 | return dlm_lock_sync_interruptible(cinfo->resync_lockres, DLM_LOCK_EX, mddev); |
c186b128 GR |
1324 | } |
1325 | ||
c40f341f | 1326 | static int resync_info_update(struct mddev *mddev, sector_t lo, sector_t hi) |
965400eb GR |
1327 | { |
1328 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
ac277c6a | 1329 | struct resync_info ri; |
aee177ac | 1330 | struct cluster_msg cmsg = {0}; |
965400eb | 1331 | |
ac277c6a GR |
1332 | /* do not send zero again, if we have sent before */ |
1333 | if (hi == 0) { | |
1334 | memcpy(&ri, cinfo->bitmap_lockres->lksb.sb_lvbptr, sizeof(struct resync_info)); | |
1335 | if (le64_to_cpu(ri.hi) == 0) | |
1336 | return 0; | |
1337 | } | |
1338 | ||
30661b49 | 1339 | add_resync_info(cinfo->bitmap_lockres, lo, hi); |
c40f341f GR |
1340 | /* Re-acquire the lock to refresh LVB */ |
1341 | dlm_lock_sync(cinfo->bitmap_lockres, DLM_LOCK_PW); | |
c40f341f | 1342 | cmsg.type = cpu_to_le32(RESYNCING); |
965400eb GR |
1343 | cmsg.low = cpu_to_le64(lo); |
1344 | cmsg.high = cpu_to_le64(hi); | |
c186b128 | 1345 | |
0ba95977 GJ |
1346 | /* |
1347 | * mddev_lock is held if resync_info_update is called from | |
1348 | * resync_finish (md_reap_sync_thread -> resync_finish) | |
1349 | */ | |
1350 | if (lo == 0 && hi == 0) | |
1351 | return sendmsg(cinfo, &cmsg, 1); | |
1352 | else | |
1353 | return sendmsg(cinfo, &cmsg, 0); | |
965400eb GR |
1354 | } |
1355 | ||
c186b128 GR |
1356 | static int resync_finish(struct mddev *mddev) |
1357 | { | |
1358 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
41a95041 | 1359 | int ret = 0; |
0357ba27 GJ |
1360 | |
1361 | clear_bit(MD_RESYNCING_REMOTE, &mddev->recovery); | |
df8c6764 GJ |
1362 | |
1363 | /* | |
1364 | * If resync thread is interrupted so we can't say resync is finished, | |
1365 | * another node will launch resync thread to continue. | |
1366 | */ | |
41a95041 GJ |
1367 | if (!test_bit(MD_CLOSING, &mddev->flags)) |
1368 | ret = resync_info_update(mddev, 0, 0); | |
1369 | dlm_unlock_sync(cinfo->resync_lockres); | |
1370 | return ret; | |
c186b128 GR |
1371 | } |
1372 | ||
90382ed9 GR |
1373 | static int area_resyncing(struct mddev *mddev, int direction, |
1374 | sector_t lo, sector_t hi) | |
589a1c49 GR |
1375 | { |
1376 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1377 | int ret = 0; | |
1378 | struct suspend_info *s; | |
1379 | ||
90382ed9 GR |
1380 | if ((direction == READ) && |
1381 | test_bit(MD_CLUSTER_SUSPEND_READ_BALANCING, &cinfo->state)) | |
1382 | return 1; | |
1383 | ||
589a1c49 GR |
1384 | spin_lock_irq(&cinfo->suspend_lock); |
1385 | if (list_empty(&cinfo->suspend_list)) | |
1386 | goto out; | |
1387 | list_for_each_entry(s, &cinfo->suspend_list, list) | |
1388 | if (hi > s->lo && lo < s->hi) { | |
1389 | ret = 1; | |
1390 | break; | |
1391 | } | |
1392 | out: | |
1393 | spin_unlock_irq(&cinfo->suspend_lock); | |
1394 | return ret; | |
1395 | } | |
1396 | ||
dbb64f86 GR |
1397 | /* add_new_disk() - initiates a disk add |
1398 | * However, if this fails before writing md_update_sb(), | |
1399 | * add_new_disk_cancel() must be called to release token lock | |
1400 | */ | |
1401 | static int add_new_disk(struct mddev *mddev, struct md_rdev *rdev) | |
1aee41f6 GR |
1402 | { |
1403 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1404 | struct cluster_msg cmsg; | |
1405 | int ret = 0; | |
1406 | struct mdp_superblock_1 *sb = page_address(rdev->sb_page); | |
1407 | char *uuid = sb->device_uuid; | |
1408 | ||
1409 | memset(&cmsg, 0, sizeof(cmsg)); | |
1410 | cmsg.type = cpu_to_le32(NEWDISK); | |
1411 | memcpy(cmsg.uuid, uuid, 16); | |
faeff83f | 1412 | cmsg.raid_slot = cpu_to_le32(rdev->desc_nr); |
0ba95977 | 1413 | lock_comm(cinfo, 1); |
1aee41f6 | 1414 | ret = __sendmsg(cinfo, &cmsg); |
2dffdc07 GJ |
1415 | if (ret) { |
1416 | unlock_comm(cinfo); | |
1aee41f6 | 1417 | return ret; |
2dffdc07 | 1418 | } |
1aee41f6 GR |
1419 | cinfo->no_new_dev_lockres->flags |= DLM_LKF_NOQUEUE; |
1420 | ret = dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_EX); | |
1421 | cinfo->no_new_dev_lockres->flags &= ~DLM_LKF_NOQUEUE; | |
1422 | /* Some node does not "see" the device */ | |
1423 | if (ret == -EAGAIN) | |
1424 | ret = -ENOENT; | |
dbb64f86 GR |
1425 | if (ret) |
1426 | unlock_comm(cinfo); | |
8b9277c8 | 1427 | else { |
1aee41f6 | 1428 | dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_CR); |
e19508fa GJ |
1429 | /* Since MD_CHANGE_DEVS will be set in add_bound_rdev which |
1430 | * will run soon after add_new_disk, the below path will be | |
1431 | * invoked: | |
1432 | * md_wakeup_thread(mddev->thread) | |
1433 | * -> conf->thread (raid1d) | |
1434 | * -> md_check_recovery -> md_update_sb | |
1435 | * -> metadata_update_start/finish | |
1436 | * MD_CLUSTER_SEND_LOCKED_ALREADY will be cleared eventually. | |
1437 | * | |
1438 | * For other failure cases, metadata_update_cancel and | |
1439 | * add_new_disk_cancel also clear below bit as well. | |
1440 | * */ | |
8b9277c8 GJ |
1441 | set_bit(MD_CLUSTER_SEND_LOCKED_ALREADY, &cinfo->state); |
1442 | wake_up(&cinfo->wait); | |
1443 | } | |
1aee41f6 GR |
1444 | return ret; |
1445 | } | |
1446 | ||
dbb64f86 | 1447 | static void add_new_disk_cancel(struct mddev *mddev) |
1aee41f6 | 1448 | { |
dbb64f86 | 1449 | struct md_cluster_info *cinfo = mddev->cluster_info; |
8b9277c8 | 1450 | clear_bit(MD_CLUSTER_SEND_LOCKED_ALREADY, &cinfo->state); |
dbb64f86 | 1451 | unlock_comm(cinfo); |
1aee41f6 GR |
1452 | } |
1453 | ||
fa8259da | 1454 | static int new_disk_ack(struct mddev *mddev, bool ack) |
1aee41f6 GR |
1455 | { |
1456 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1457 | ||
fa8259da GR |
1458 | if (!test_bit(MD_CLUSTER_WAITING_FOR_NEWDISK, &cinfo->state)) { |
1459 | pr_warn("md-cluster(%s): Spurious cluster confirmation\n", mdname(mddev)); | |
1460 | return -EINVAL; | |
1461 | } | |
1462 | ||
1aee41f6 GR |
1463 | if (ack) |
1464 | dlm_unlock_sync(cinfo->no_new_dev_lockres); | |
1465 | complete(&cinfo->newdisk_completion); | |
fa8259da | 1466 | return 0; |
1aee41f6 GR |
1467 | } |
1468 | ||
88bcfef7 GR |
1469 | static int remove_disk(struct mddev *mddev, struct md_rdev *rdev) |
1470 | { | |
aee177ac | 1471 | struct cluster_msg cmsg = {0}; |
88bcfef7 | 1472 | struct md_cluster_info *cinfo = mddev->cluster_info; |
faeff83f GJ |
1473 | cmsg.type = cpu_to_le32(REMOVE); |
1474 | cmsg.raid_slot = cpu_to_le32(rdev->desc_nr); | |
0ba95977 | 1475 | return sendmsg(cinfo, &cmsg, 1); |
88bcfef7 GR |
1476 | } |
1477 | ||
f6a2dc64 GJ |
1478 | static int lock_all_bitmaps(struct mddev *mddev) |
1479 | { | |
1480 | int slot, my_slot, ret, held = 1, i = 0; | |
1481 | char str[64]; | |
1482 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1483 | ||
6396bb22 KC |
1484 | cinfo->other_bitmap_lockres = |
1485 | kcalloc(mddev->bitmap_info.nodes - 1, | |
1486 | sizeof(struct dlm_lock_resource *), GFP_KERNEL); | |
f6a2dc64 GJ |
1487 | if (!cinfo->other_bitmap_lockres) { |
1488 | pr_err("md: can't alloc mem for other bitmap locks\n"); | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | my_slot = slot_number(mddev); | |
1493 | for (slot = 0; slot < mddev->bitmap_info.nodes; slot++) { | |
1494 | if (slot == my_slot) | |
1495 | continue; | |
1496 | ||
1497 | memset(str, '\0', 64); | |
1498 | snprintf(str, 64, "bitmap%04d", slot); | |
1499 | cinfo->other_bitmap_lockres[i] = lockres_init(mddev, str, NULL, 1); | |
1500 | if (!cinfo->other_bitmap_lockres[i]) | |
1501 | return -ENOMEM; | |
1502 | ||
1503 | cinfo->other_bitmap_lockres[i]->flags |= DLM_LKF_NOQUEUE; | |
1504 | ret = dlm_lock_sync(cinfo->other_bitmap_lockres[i], DLM_LOCK_PW); | |
1505 | if (ret) | |
1506 | held = -1; | |
1507 | i++; | |
1508 | } | |
1509 | ||
1510 | return held; | |
1511 | } | |
1512 | ||
1513 | static void unlock_all_bitmaps(struct mddev *mddev) | |
1514 | { | |
1515 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1516 | int i; | |
1517 | ||
1518 | /* release other node's bitmap lock if they are existed */ | |
1519 | if (cinfo->other_bitmap_lockres) { | |
1520 | for (i = 0; i < mddev->bitmap_info.nodes - 1; i++) { | |
1521 | if (cinfo->other_bitmap_lockres[i]) { | |
f6a2dc64 GJ |
1522 | lockres_free(cinfo->other_bitmap_lockres[i]); |
1523 | } | |
1524 | } | |
1525 | kfree(cinfo->other_bitmap_lockres); | |
1526 | } | |
1527 | } | |
1528 | ||
97f6cd39 GR |
1529 | static int gather_bitmaps(struct md_rdev *rdev) |
1530 | { | |
1531 | int sn, err; | |
1532 | sector_t lo, hi; | |
aee177ac | 1533 | struct cluster_msg cmsg = {0}; |
97f6cd39 GR |
1534 | struct mddev *mddev = rdev->mddev; |
1535 | struct md_cluster_info *cinfo = mddev->cluster_info; | |
1536 | ||
faeff83f GJ |
1537 | cmsg.type = cpu_to_le32(RE_ADD); |
1538 | cmsg.raid_slot = cpu_to_le32(rdev->desc_nr); | |
0ba95977 | 1539 | err = sendmsg(cinfo, &cmsg, 1); |
97f6cd39 GR |
1540 | if (err) |
1541 | goto out; | |
1542 | ||
1543 | for (sn = 0; sn < mddev->bitmap_info.nodes; sn++) { | |
1544 | if (sn == (cinfo->slot_number - 1)) | |
1545 | continue; | |
e64e4018 | 1546 | err = md_bitmap_copy_from_slot(mddev, sn, &lo, &hi, false); |
97f6cd39 GR |
1547 | if (err) { |
1548 | pr_warn("md-cluster: Could not gather bitmaps from slot %d", sn); | |
1549 | goto out; | |
1550 | } | |
1551 | if ((hi > 0) && (lo < mddev->recovery_cp)) | |
1552 | mddev->recovery_cp = lo; | |
1553 | } | |
1554 | out: | |
1555 | return err; | |
1556 | } | |
1557 | ||
edb39c9d GR |
1558 | static struct md_cluster_operations cluster_ops = { |
1559 | .join = join, | |
1560 | .leave = leave, | |
cf921cc1 | 1561 | .slot_number = slot_number, |
c186b128 GR |
1562 | .resync_start = resync_start, |
1563 | .resync_finish = resync_finish, | |
96ae923a | 1564 | .resync_info_update = resync_info_update, |
293467aa GR |
1565 | .metadata_update_start = metadata_update_start, |
1566 | .metadata_update_finish = metadata_update_finish, | |
1567 | .metadata_update_cancel = metadata_update_cancel, | |
589a1c49 | 1568 | .area_resyncing = area_resyncing, |
dbb64f86 GR |
1569 | .add_new_disk = add_new_disk, |
1570 | .add_new_disk_cancel = add_new_disk_cancel, | |
1aee41f6 | 1571 | .new_disk_ack = new_disk_ack, |
88bcfef7 | 1572 | .remove_disk = remove_disk, |
51e453ae | 1573 | .load_bitmaps = load_bitmaps, |
97f6cd39 | 1574 | .gather_bitmaps = gather_bitmaps, |
afd75628 | 1575 | .resize_bitmaps = resize_bitmaps, |
f6a2dc64 GJ |
1576 | .lock_all_bitmaps = lock_all_bitmaps, |
1577 | .unlock_all_bitmaps = unlock_all_bitmaps, | |
818da59f | 1578 | .update_size = update_size, |
edb39c9d GR |
1579 | }; |
1580 | ||
8e854e9c GR |
1581 | static int __init cluster_init(void) |
1582 | { | |
f0e230ad | 1583 | pr_warn("md-cluster: support raid1 and raid10 (limited support)\n"); |
8e854e9c | 1584 | pr_info("Registering Cluster MD functions\n"); |
edb39c9d | 1585 | register_md_cluster_operations(&cluster_ops, THIS_MODULE); |
8e854e9c GR |
1586 | return 0; |
1587 | } | |
1588 | ||
1589 | static void cluster_exit(void) | |
1590 | { | |
edb39c9d | 1591 | unregister_md_cluster_operations(); |
8e854e9c GR |
1592 | } |
1593 | ||
1594 | module_init(cluster_init); | |
1595 | module_exit(cluster_exit); | |
86b57277 | 1596 | MODULE_AUTHOR("SUSE"); |
8e854e9c GR |
1597 | MODULE_LICENSE("GPL"); |
1598 | MODULE_DESCRIPTION("Clustering support for MD"); |