source: mainline/uspace/srv/bd/hr/raid1.c@ 155d34f

Last change on this file since 155d34f was 155d34f, checked in by Miroslav Cimerman <mc@…>, 7 weeks ago

hr: rename hr_get_*_status_msg → hr_get_*_state_str
  • Property mode set to 100644
File size: 18.3 KB
Line 
1/*
2 * Copyright (c) 2025 Miroslav Cimerman
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup hr
30 * @{
31 */
32/**
33 * @file
34 */
35
36#include <abi/ipc/ipc.h>
37#include <bd_srv.h>
38#include <block.h>
39#include <errno.h>
40#include <hr.h>
41#include <inttypes.h>
42#include <io/log.h>
43#include <ipc/hr.h>
44#include <ipc/services.h>
45#include <loc.h>
46#include <task.h>
47#include <stdatomic.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <str_error.h>
51
52#include "fge.h"
53#include "io.h"
54#include "superblock.h"
55#include "util.h"
56#include "var.h"
57
58static void hr_raid1_update_vol_status(hr_volume_t *);
59static void hr_raid1_ext_state_callback(hr_volume_t *, size_t, errno_t);
60static size_t hr_raid1_count_good_extents(hr_volume_t *, uint64_t, size_t,
61 uint64_t);
62static errno_t hr_raid1_bd_op(hr_bd_op_type_t, bd_srv_t *, aoff64_t, size_t,
63 void *, const void *, size_t);
64static errno_t hr_raid1_rebuild(void *);
65static errno_t init_rebuild(hr_volume_t *, size_t *);
66static errno_t swap_hs(hr_volume_t *, size_t, size_t);
67static errno_t hr_raid1_restore_blocks(hr_volume_t *, size_t, uint64_t, size_t,
68 void *);
69
70/* bdops */
71static errno_t hr_raid1_bd_open(bd_srvs_t *, bd_srv_t *);
72static errno_t hr_raid1_bd_close(bd_srv_t *);
73static errno_t hr_raid1_bd_read_blocks(bd_srv_t *, aoff64_t, size_t, void *,
74 size_t);
75static errno_t hr_raid1_bd_sync_cache(bd_srv_t *, aoff64_t, size_t);
76static errno_t hr_raid1_bd_write_blocks(bd_srv_t *, aoff64_t, size_t,
77 const void *, size_t);
78static errno_t hr_raid1_bd_get_block_size(bd_srv_t *, size_t *);
79static errno_t hr_raid1_bd_get_num_blocks(bd_srv_t *, aoff64_t *);
80
81static bd_ops_t hr_raid1_bd_ops = {
82 .open = hr_raid1_bd_open,
83 .close = hr_raid1_bd_close,
84 .sync_cache = hr_raid1_bd_sync_cache,
85 .read_blocks = hr_raid1_bd_read_blocks,
86 .write_blocks = hr_raid1_bd_write_blocks,
87 .get_block_size = hr_raid1_bd_get_block_size,
88 .get_num_blocks = hr_raid1_bd_get_num_blocks
89};
90
91extern loc_srv_t *hr_srv;
92
93errno_t hr_raid1_create(hr_volume_t *new_volume)
94{
95 HR_DEBUG("%s()", __func__);
96
97 assert(new_volume->level == HR_LVL_1);
98
99 if (new_volume->extent_no < 2) {
100 HR_ERROR("RAID 1 array needs at least 2 devices\n");
101 return EINVAL;
102 }
103
104 bd_srvs_init(&new_volume->hr_bds);
105 new_volume->hr_bds.ops = &hr_raid1_bd_ops;
106 new_volume->hr_bds.sarg = new_volume;
107
108 new_volume->state_callback = hr_raid1_ext_state_callback;
109
110 /* force volume state update */
111 hr_mark_vol_state_dirty(new_volume);
112 hr_raid1_update_vol_status(new_volume);
113
114 fibril_rwlock_read_lock(&new_volume->states_lock);
115 hr_vol_status_t state = new_volume->status;
116 fibril_rwlock_read_unlock(&new_volume->states_lock);
117 if (state == HR_VOL_FAULTY || state == HR_VOL_NONE) {
118 HR_NOTE("\"%s\": unusable state, not creating\n",
119 new_volume->devname);
120 return EINVAL;
121 }
122
123 return EOK;
124}
125
126/*
127 * Called only once in volume's lifetime.
128 */
129errno_t hr_raid1_init(hr_volume_t *vol)
130{
131 HR_DEBUG("%s()", __func__);
132
133 assert(vol->level == HR_LVL_1);
134
135 vol->data_offset = vol->meta_ops->get_data_offset();
136 vol->data_blkno = vol->truncated_blkno - vol->meta_ops->get_size();
137 vol->strip_size = 0;
138
139 return EOK;
140}
141
142void hr_raid1_status_event(hr_volume_t *vol)
143{
144 HR_DEBUG("%s()", __func__);
145
146 hr_raid1_update_vol_status(vol);
147}
148
149errno_t hr_raid1_add_hotspare(hr_volume_t *vol, service_id_t hotspare)
150{
151 HR_DEBUG("%s()", __func__);
152
153 errno_t rc = hr_util_add_hotspare(vol, hotspare);
154
155 hr_raid1_update_vol_status(vol);
156
157 return rc;
158}
159
160static errno_t hr_raid1_bd_open(bd_srvs_t *bds, bd_srv_t *bd)
161{
162 HR_DEBUG("%s()", __func__);
163
164 hr_volume_t *vol = bd->srvs->sarg;
165
166 atomic_fetch_add_explicit(&vol->open_cnt, 1, memory_order_relaxed);
167
168 return EOK;
169}
170
171static errno_t hr_raid1_bd_close(bd_srv_t *bd)
172{
173 HR_DEBUG("%s()", __func__);
174
175 hr_volume_t *vol = bd->srvs->sarg;
176
177 atomic_fetch_sub_explicit(&vol->open_cnt, 1, memory_order_relaxed);
178
179 return EOK;
180}
181
182static errno_t hr_raid1_bd_sync_cache(bd_srv_t *bd, aoff64_t ba, size_t cnt)
183{
184 return hr_raid1_bd_op(HR_BD_SYNC, bd, ba, cnt, NULL, NULL, 0);
185}
186
187static errno_t hr_raid1_bd_read_blocks(bd_srv_t *bd, aoff64_t ba, size_t cnt,
188 void *buf, size_t size)
189{
190 return hr_raid1_bd_op(HR_BD_READ, bd, ba, cnt, buf, NULL, size);
191}
192
193static errno_t hr_raid1_bd_write_blocks(bd_srv_t *bd, aoff64_t ba, size_t cnt,
194 const void *data, size_t size)
195{
196 return hr_raid1_bd_op(HR_BD_WRITE, bd, ba, cnt, NULL, data, size);
197}
198
199static errno_t hr_raid1_bd_get_block_size(bd_srv_t *bd, size_t *rsize)
200{
201 hr_volume_t *vol = bd->srvs->sarg;
202
203 *rsize = vol->bsize;
204 return EOK;
205}
206
207static errno_t hr_raid1_bd_get_num_blocks(bd_srv_t *bd, aoff64_t *rnb)
208{
209 hr_volume_t *vol = bd->srvs->sarg;
210
211 *rnb = vol->data_blkno;
212 return EOK;
213}
214
215static void hr_raid1_update_vol_status(hr_volume_t *vol)
216{
217 bool exp = true;
218
219 /* TODO: could also wrap this */
220 if (!atomic_compare_exchange_strong(&vol->state_dirty, &exp, false))
221 return;
222
223 fibril_mutex_lock(&vol->md_lock);
224
225 vol->meta_ops->inc_counter(vol->in_mem_md);
226 /* XXX: save right away */
227
228 fibril_mutex_unlock(&vol->md_lock);
229
230 fibril_rwlock_read_lock(&vol->extents_lock);
231 fibril_rwlock_read_lock(&vol->states_lock);
232
233 hr_vol_status_t old_state = vol->status;
234 size_t healthy = hr_count_extents(vol, HR_EXT_ONLINE);
235
236 fibril_rwlock_read_unlock(&vol->states_lock);
237 fibril_rwlock_read_unlock(&vol->extents_lock);
238
239 if (healthy == 0) {
240 if (old_state != HR_VOL_FAULTY) {
241 fibril_rwlock_write_lock(&vol->states_lock);
242 hr_update_vol_status(vol, HR_VOL_FAULTY);
243 fibril_rwlock_write_unlock(&vol->states_lock);
244 }
245 } else if (healthy < vol->extent_no) {
246 if (old_state != HR_VOL_REBUILD &&
247 old_state != HR_VOL_DEGRADED) {
248 fibril_rwlock_write_lock(&vol->states_lock);
249 hr_update_vol_status(vol, HR_VOL_DEGRADED);
250 fibril_rwlock_write_unlock(&vol->states_lock);
251 }
252
253 if (old_state != HR_VOL_REBUILD) {
254 /* XXX: allow REBUILD on INVALID extents */
255 if (vol->hotspare_no > 0) {
256 fid_t fib = fibril_create(hr_raid1_rebuild,
257 vol);
258 if (fib == 0)
259 return;
260 fibril_start(fib);
261 fibril_detach(fib);
262 }
263 }
264 } else {
265 if (old_state != HR_VOL_ONLINE) {
266 fibril_rwlock_write_lock(&vol->states_lock);
267 hr_update_vol_status(vol, HR_VOL_ONLINE);
268 fibril_rwlock_write_unlock(&vol->states_lock);
269 }
270 }
271}
272
273static void hr_raid1_ext_state_callback(hr_volume_t *vol, size_t extent,
274 errno_t rc)
275{
276 if (rc == EOK)
277 return;
278
279 assert(fibril_rwlock_is_locked(&vol->extents_lock));
280
281 fibril_rwlock_write_lock(&vol->states_lock);
282
283 switch (rc) {
284 case ENOMEM:
285 hr_update_ext_status(vol, extent, HR_EXT_INVALID);
286 break;
287 case ENOENT:
288 hr_update_ext_status(vol, extent, HR_EXT_MISSING);
289 break;
290 default:
291 hr_update_ext_status(vol, extent, HR_EXT_FAILED);
292 }
293
294 hr_mark_vol_state_dirty(vol);
295
296 fibril_rwlock_write_unlock(&vol->states_lock);
297}
298
299static size_t hr_raid1_count_good_extents(hr_volume_t *vol, uint64_t ba,
300 size_t cnt, uint64_t rebuild_blk)
301{
302 assert(fibril_rwlock_is_locked(&vol->extents_lock));
303 assert(fibril_rwlock_is_locked(&vol->states_lock));
304
305 size_t count = 0;
306 for (size_t i = 0; i < vol->extent_no; i++) {
307 if (vol->extents[i].status == HR_EXT_ONLINE ||
308 (vol->extents[i].status == HR_EXT_REBUILD &&
309 ba < rebuild_blk)) {
310 count++;
311 }
312 }
313
314 return count;
315
316}
317
318static errno_t hr_raid1_bd_op(hr_bd_op_type_t type, bd_srv_t *bd, aoff64_t ba,
319 size_t cnt, void *data_read, const void *data_write, size_t size)
320{
321 hr_volume_t *vol = bd->srvs->sarg;
322 hr_range_lock_t *rl = NULL;
323 errno_t rc;
324 size_t i;
325 uint64_t rebuild_blk;
326
327 fibril_rwlock_read_lock(&vol->states_lock);
328 hr_vol_status_t vol_state = vol->status;
329 fibril_rwlock_read_unlock(&vol->states_lock);
330
331 if (vol_state == HR_VOL_FAULTY || vol_state == HR_VOL_NONE)
332 return EIO;
333
334 if (type == HR_BD_READ || type == HR_BD_WRITE)
335 if (size < cnt * vol->bsize)
336 return EINVAL;
337
338 rc = hr_check_ba_range(vol, cnt, ba);
339 if (rc != EOK)
340 return rc;
341
342 /* allow full dev sync */
343 if (type != HR_BD_SYNC || ba != 0)
344 hr_add_ba_offset(vol, &ba);
345
346 /*
347 * extent order has to be locked for the whole IO duration,
348 * so that workers have consistent targets
349 */
350 fibril_rwlock_read_lock(&vol->extents_lock);
351
352 size_t successful = 0;
353 switch (type) {
354 case HR_BD_READ:
355 rebuild_blk = atomic_load_explicit(&vol->rebuild_blk,
356 memory_order_relaxed);
357
358 for (i = 0; i < vol->extent_no; i++) {
359 fibril_rwlock_read_lock(&vol->states_lock);
360 hr_ext_status_t state = vol->extents[i].status;
361 fibril_rwlock_read_unlock(&vol->states_lock);
362
363 if (state != HR_EXT_ONLINE &&
364 (state != HR_EXT_REBUILD ||
365 ba + cnt - 1 >= rebuild_blk)) {
366 continue;
367 }
368
369 rc = block_read_direct(vol->extents[i].svc_id, ba, cnt,
370 data_read);
371
372 if (rc == ENOMEM && i + 1 == vol->extent_no)
373 goto end;
374
375 if (rc == ENOMEM)
376 continue;
377
378 if (rc != EOK) {
379 hr_raid1_ext_state_callback(vol, i, rc);
380 } else {
381 successful++;
382 break;
383 }
384 }
385 break;
386 case HR_BD_SYNC:
387 case HR_BD_WRITE:
388 if (type == HR_BD_WRITE) {
389 rl = hr_range_lock_acquire(vol, ba, cnt);
390 if (rl == NULL) {
391 rc = ENOMEM;
392 goto end;
393 }
394 }
395
396 fibril_rwlock_read_lock(&vol->states_lock);
397
398 rebuild_blk = atomic_load_explicit(&vol->rebuild_blk,
399 memory_order_relaxed);
400
401 size_t good = hr_raid1_count_good_extents(vol, ba, cnt,
402 rebuild_blk);
403
404 hr_fgroup_t *group = hr_fgroup_create(vol->fge, good);
405 if (group == NULL) {
406 if (type == HR_BD_WRITE)
407 hr_range_lock_release(rl);
408 rc = ENOMEM;
409 fibril_rwlock_read_unlock(&vol->states_lock);
410 goto end;
411 }
412
413 for (i = 0; i < vol->extent_no; i++) {
414 if (vol->extents[i].status != HR_EXT_ONLINE &&
415 (vol->extents[i].status != HR_EXT_REBUILD ||
416 ba >= rebuild_blk)) {
417 /*
418 * When the extent is being rebuilt,
419 * we only write to the part that is already
420 * rebuilt. If IO starts after vol->rebuild_blk
421 * we do not proceed, the write is going to
422 * be replicated later in the rebuild.
423 */
424 continue;
425 }
426
427 hr_io_t *io = hr_fgroup_alloc(group);
428 io->extent = i;
429 io->data_write = data_write;
430 io->data_read = data_read;
431 io->ba = ba;
432 io->cnt = cnt;
433 io->type = type;
434 io->vol = vol;
435
436 hr_fgroup_submit(group, hr_io_worker, io);
437 }
438
439 fibril_rwlock_read_unlock(&vol->states_lock);
440
441 (void)hr_fgroup_wait(group, &successful, NULL);
442
443 if (type == HR_BD_WRITE)
444 hr_range_lock_release(rl);
445
446 break;
447 default:
448 rc = EINVAL;
449 goto end;
450 }
451
452 if (successful > 0)
453 rc = EOK;
454 else
455 rc = EIO;
456
457end:
458 fibril_rwlock_read_unlock(&vol->extents_lock);
459
460 hr_raid1_update_vol_status(vol);
461
462 return rc;
463}
464
465/*
466 * Put the last HOTSPARE extent in place
467 * of first that != ONLINE, and start the rebuild.
468 */
469static errno_t hr_raid1_rebuild(void *arg)
470{
471 HR_DEBUG("%s()", __func__);
472
473 hr_volume_t *vol = arg;
474 void *buf = NULL;
475 size_t rebuild_idx;
476 errno_t rc;
477
478 rc = init_rebuild(vol, &rebuild_idx);
479 if (rc != EOK)
480 return rc;
481
482 size_t left = vol->data_blkno;
483 size_t max_blks = DATA_XFER_LIMIT / vol->bsize;
484 buf = malloc(max_blks * vol->bsize);
485
486 size_t cnt;
487 uint64_t ba = 0;
488 hr_add_ba_offset(vol, &ba);
489
490 /*
491 * XXX: this is useless here after simplified DI, because
492 * rebuild cannot be triggered while ongoing rebuild
493 */
494 fibril_rwlock_read_lock(&vol->extents_lock);
495
496 hr_range_lock_t *rl = NULL;
497
498 unsigned int percent, old_percent = 100;
499 while (left != 0) {
500 cnt = min(max_blks, left);
501
502 rl = hr_range_lock_acquire(vol, ba, cnt);
503 if (rl == NULL) {
504 rc = ENOMEM;
505 goto end;
506 }
507
508 atomic_store_explicit(&vol->rebuild_blk, ba,
509 memory_order_relaxed);
510
511 rc = hr_raid1_restore_blocks(vol, rebuild_idx, ba, cnt, buf);
512
513 percent = ((ba + cnt) * 100) / vol->data_blkno;
514 if (percent != old_percent) {
515 if (percent % 5 == 0)
516 HR_DEBUG("\"%s\" REBUILD progress: %u%%\n",
517 vol->devname, percent);
518 }
519
520 hr_range_lock_release(rl);
521
522 if (rc != EOK)
523 goto end;
524
525 ba += cnt;
526 left -= cnt;
527 old_percent = percent;
528 }
529
530 HR_DEBUG("hr_raid1_rebuild(): rebuild finished on \"%s\" (%" PRIun "), "
531 "extent no. %zu\n", vol->devname, vol->svc_id, rebuild_idx);
532
533 fibril_rwlock_write_lock(&vol->states_lock);
534
535 hr_update_ext_status(vol, rebuild_idx, HR_EXT_ONLINE);
536
537 /*
538 * We can be optimistic here, if some extents are
539 * still INVALID, FAULTY or MISSING, the update vol
540 * function will pick them up, and set the volume
541 * state accordingly.
542 */
543 hr_update_vol_status(vol, HR_VOL_ONLINE);
544 hr_mark_vol_state_dirty(vol);
545
546 fibril_rwlock_write_unlock(&vol->states_lock);
547
548 rc = vol->meta_ops->save(vol, WITH_STATE_CALLBACK);
549
550end:
551 if (rc != EOK) {
552 /*
553 * We can fail either because:
554 * - the rebuild extent failing or invalidation
555 * - there is are no ONLINE extents (vol is FAULTY)
556 * - we got ENOMEM on all READs (we also invalidate the
557 * rebuild extent here, for now)
558 */
559 fibril_rwlock_write_lock(&vol->states_lock);
560 hr_update_vol_status(vol, HR_VOL_DEGRADED);
561 hr_mark_vol_state_dirty(vol);
562 fibril_rwlock_write_unlock(&vol->states_lock);
563 }
564
565 fibril_rwlock_read_unlock(&vol->extents_lock);
566
567 hr_raid1_update_vol_status(vol);
568
569 if (buf != NULL)
570 free(buf);
571
572 return rc;
573}
574
575static errno_t init_rebuild(hr_volume_t *vol, size_t *rebuild_idx)
576{
577 errno_t rc = EOK;
578
579 fibril_rwlock_write_lock(&vol->extents_lock);
580 fibril_rwlock_write_lock(&vol->states_lock);
581 fibril_mutex_lock(&vol->hotspare_lock);
582
583 /* XXX: allow REBUILD on INVALID extents */
584 if (vol->hotspare_no == 0) {
585 HR_WARN("hr_raid1_rebuild(): no free hotspares on \"%s\", "
586 "aborting rebuild\n", vol->devname);
587 rc = EINVAL;
588 goto error;
589 }
590
591 size_t bad = vol->extent_no;
592 for (size_t i = 0; i < vol->extent_no; i++) {
593 if (vol->extents[i].status != HR_EXT_ONLINE) {
594 bad = i;
595 break;
596 }
597 }
598
599 if (bad == vol->extent_no) {
600 HR_WARN("hr_raid1_rebuild(): no bad extent on \"%s\", "
601 "aborting rebuild\n", vol->devname);
602 rc = EINVAL;
603 goto error;
604 }
605
606 size_t hotspare_idx = vol->hotspare_no - 1;
607
608 hr_ext_status_t hs_state = vol->hotspares[hotspare_idx].status;
609 if (hs_state != HR_EXT_HOTSPARE) {
610 HR_ERROR("hr_raid1_rebuild(): invalid hotspare state \"%s\", "
611 "aborting rebuild\n", hr_get_ext_state_str(hs_state));
612 rc = EINVAL;
613 goto error;
614 }
615
616 rc = swap_hs(vol, bad, hotspare_idx);
617 if (rc != EOK) {
618 HR_ERROR("hr_raid1_rebuild(): swapping hotspare failed, "
619 "aborting rebuild\n");
620 goto error;
621 }
622
623 hr_extent_t *rebuild_ext = &vol->extents[bad];
624
625 HR_DEBUG("hr_raid1_rebuild(): starting REBUILD on extent no. %zu "
626 "(%" PRIun ")\n", bad, rebuild_ext->svc_id);
627
628 atomic_store_explicit(&vol->rebuild_blk, 0, memory_order_relaxed);
629
630 hr_update_ext_status(vol, bad, HR_EXT_REBUILD);
631 hr_update_vol_status(vol, HR_VOL_REBUILD);
632
633 *rebuild_idx = bad;
634error:
635 fibril_mutex_unlock(&vol->hotspare_lock);
636 fibril_rwlock_write_unlock(&vol->states_lock);
637 fibril_rwlock_write_unlock(&vol->extents_lock);
638
639 return rc;
640}
641
642static errno_t swap_hs(hr_volume_t *vol, size_t bad, size_t hs)
643{
644 HR_DEBUG("hr_raid1_rebuild(): swapping in hotspare\n");
645
646 service_id_t faulty_svc_id = vol->extents[bad].svc_id;
647 service_id_t hs_svc_id = vol->hotspares[hs].svc_id;
648
649 hr_update_ext_svc_id(vol, bad, hs_svc_id);
650 hr_update_ext_status(vol, bad, HR_EXT_HOTSPARE);
651
652 hr_update_hotspare_svc_id(vol, hs, 0);
653 hr_update_hotspare_status(vol, hs, HR_EXT_MISSING);
654
655 vol->hotspare_no--;
656
657 if (faulty_svc_id != 0)
658 block_fini(faulty_svc_id);
659
660 return EOK;
661}
662
663static errno_t hr_raid1_restore_blocks(hr_volume_t *vol, size_t rebuild_idx,
664 uint64_t ba, size_t cnt, void *buf)
665{
666 assert(fibril_rwlock_is_locked(&vol->extents_lock));
667
668 errno_t rc = ENOENT;
669 hr_extent_t *ext, *rebuild_ext = &vol->extents[rebuild_idx];
670
671 fibril_rwlock_read_lock(&vol->states_lock);
672 hr_ext_status_t rebuild_ext_status = rebuild_ext->status;
673 fibril_rwlock_read_unlock(&vol->states_lock);
674
675 if (rebuild_ext_status != HR_EXT_REBUILD)
676 return EINVAL;
677
678 for (size_t i = 0; i < vol->extent_no; i++) {
679 fibril_rwlock_read_lock(&vol->states_lock);
680 ext = &vol->extents[i];
681 if (ext->status != HR_EXT_ONLINE) {
682 fibril_rwlock_read_unlock(&vol->states_lock);
683 continue;
684 }
685 fibril_rwlock_read_unlock(&vol->states_lock);
686
687 rc = block_read_direct(ext->svc_id, ba, cnt, buf);
688 if (rc == EOK)
689 break;
690
691 if (rc != ENOMEM)
692 hr_raid1_ext_state_callback(vol, i, rc);
693
694 if (i + 1 >= vol->extent_no) {
695 if (rc != ENOMEM) {
696 HR_ERROR("rebuild on \"%s\" (%" PRIun "), "
697 "failed due to too many failed extents\n",
698 vol->devname, vol->svc_id);
699 }
700
701 /* for now we have to invalidate the rebuild extent */
702 if (rc == ENOMEM) {
703 HR_ERROR("rebuild on \"%s\" (%" PRIun "), "
704 "failed due to too many failed reads, "
705 "because of not enough memory\n",
706 vol->devname, vol->svc_id);
707 hr_raid1_ext_state_callback(vol, rebuild_idx,
708 ENOMEM);
709 }
710
711 return rc;
712 }
713 }
714
715 rc = block_write_direct(rebuild_ext->svc_id, ba, cnt, buf);
716 if (rc != EOK) {
717 /*
718 * Here we dont handle ENOMEM, because maybe in the
719 * future, there is going to be M_WAITOK, or we are
720 * going to wait for more memory, so that we don't
721 * have to invalidate it...
722 *
723 * XXX: for now we do
724 */
725 hr_raid1_ext_state_callback(vol, rebuild_idx, rc);
726
727 HR_ERROR("rebuild on \"%s\" (%" PRIun "), failed due to "
728 "the rebuilt extent no. %zu WRITE (rc: %s)\n",
729 vol->devname, vol->svc_id, rebuild_idx, str_error(rc));
730
731 return rc;
732 }
733
734 return EOK;
735}
736
737/** @}
738 */
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