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13#ifndef __UBOOT__
14#include <linux/err.h>
15#include <linux/slab.h>
16#include <linux/export.h>
17#else
18#include <div64.h>
19#include <ubi_uboot.h>
20#endif
21#include <linux/math64.h>
22
23#include "ubi.h"
24
25static int self_check_volumes(struct ubi_device *ubi);
26
27#ifndef __UBOOT__
28static ssize_t vol_attribute_show(struct device *dev,
29 struct device_attribute *attr, char *buf);
30
31
32static struct device_attribute attr_vol_reserved_ebs =
33 __ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL);
34static struct device_attribute attr_vol_type =
35 __ATTR(type, S_IRUGO, vol_attribute_show, NULL);
36static struct device_attribute attr_vol_name =
37 __ATTR(name, S_IRUGO, vol_attribute_show, NULL);
38static struct device_attribute attr_vol_corrupted =
39 __ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL);
40static struct device_attribute attr_vol_alignment =
41 __ATTR(alignment, S_IRUGO, vol_attribute_show, NULL);
42static struct device_attribute attr_vol_usable_eb_size =
43 __ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL);
44static struct device_attribute attr_vol_data_bytes =
45 __ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL);
46static struct device_attribute attr_vol_upd_marker =
47 __ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL);
48
49
50
51
52
53
54
55
56
57
58
59
60
61static ssize_t vol_attribute_show(struct device *dev,
62 struct device_attribute *attr, char *buf)
63{
64 int ret;
65 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
66 struct ubi_device *ubi;
67
68 ubi = ubi_get_device(vol->ubi->ubi_num);
69 if (!ubi)
70 return -ENODEV;
71
72 spin_lock(&ubi->volumes_lock);
73 if (!ubi->volumes[vol->vol_id]) {
74 spin_unlock(&ubi->volumes_lock);
75 ubi_put_device(ubi);
76 return -ENODEV;
77 }
78
79 vol->ref_count += 1;
80 spin_unlock(&ubi->volumes_lock);
81
82 if (attr == &attr_vol_reserved_ebs)
83 ret = sprintf(buf, "%d\n", vol->reserved_pebs);
84 else if (attr == &attr_vol_type) {
85 const char *tp;
86
87 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
88 tp = "dynamic";
89 else
90 tp = "static";
91 ret = sprintf(buf, "%s\n", tp);
92 } else if (attr == &attr_vol_name)
93 ret = sprintf(buf, "%s\n", vol->name);
94 else if (attr == &attr_vol_corrupted)
95 ret = sprintf(buf, "%d\n", vol->corrupted);
96 else if (attr == &attr_vol_alignment)
97 ret = sprintf(buf, "%d\n", vol->alignment);
98 else if (attr == &attr_vol_usable_eb_size)
99 ret = sprintf(buf, "%d\n", vol->usable_leb_size);
100 else if (attr == &attr_vol_data_bytes)
101 ret = sprintf(buf, "%lld\n", vol->used_bytes);
102 else if (attr == &attr_vol_upd_marker)
103 ret = sprintf(buf, "%d\n", vol->upd_marker);
104 else
105
106 ret = -EINVAL;
107
108
109 spin_lock(&ubi->volumes_lock);
110 vol->ref_count -= 1;
111 ubi_assert(vol->ref_count >= 0);
112 spin_unlock(&ubi->volumes_lock);
113 ubi_put_device(ubi);
114 return ret;
115}
116
117static struct attribute *volume_dev_attrs[] = {
118 &attr_vol_reserved_ebs.attr,
119 &attr_vol_type.attr,
120 &attr_vol_name.attr,
121 &attr_vol_corrupted.attr,
122 &attr_vol_alignment.attr,
123 &attr_vol_usable_eb_size.attr,
124 &attr_vol_data_bytes.attr,
125 &attr_vol_upd_marker.attr,
126 NULL
127};
128ATTRIBUTE_GROUPS(volume_dev);
129#endif
130
131
132static void vol_release(struct device *dev)
133{
134 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
135
136 kfree(vol->eba_tbl);
137 kfree(vol);
138}
139
140
141
142
143
144
145
146
147
148
149
150
151int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
152{
153 int i, err, vol_id = req->vol_id, do_free = 1;
154 struct ubi_volume *vol;
155 struct ubi_vtbl_record vtbl_rec;
156 dev_t dev;
157
158 if (ubi->ro_mode)
159 return -EROFS;
160
161 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
162 if (!vol)
163 return -ENOMEM;
164
165 spin_lock(&ubi->volumes_lock);
166 if (vol_id == UBI_VOL_NUM_AUTO) {
167
168 dbg_gen("search for vacant volume ID");
169 for (i = 0; i < ubi->vtbl_slots; i++)
170 if (!ubi->volumes[i]) {
171 vol_id = i;
172 break;
173 }
174
175 if (vol_id == UBI_VOL_NUM_AUTO) {
176 ubi_err(ubi, "out of volume IDs");
177 err = -ENFILE;
178 goto out_unlock;
179 }
180 req->vol_id = vol_id;
181 }
182
183 dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",
184 ubi->ubi_num, vol_id, (unsigned long long)req->bytes,
185 (int)req->vol_type, req->name);
186
187
188 err = -EEXIST;
189 if (ubi->volumes[vol_id]) {
190 ubi_err(ubi, "volume %d already exists", vol_id);
191 goto out_unlock;
192 }
193
194
195 for (i = 0; i < ubi->vtbl_slots; i++)
196 if (ubi->volumes[i] &&
197 ubi->volumes[i]->name_len == req->name_len &&
198 !strcmp(ubi->volumes[i]->name, req->name)) {
199 ubi_err(ubi, "volume \"%s\" exists (ID %d)",
200 req->name, i);
201 goto out_unlock;
202 }
203
204
205 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
206 vol->reserved_pebs = div_u64(req->bytes + vol->usable_leb_size - 1,
207 vol->usable_leb_size);
208
209
210 if (vol->reserved_pebs > ubi->avail_pebs) {
211 ubi_err(ubi, "not enough PEBs, only %d available",
212 ubi->avail_pebs);
213 if (ubi->corr_peb_count)
214 ubi_err(ubi, "%d PEBs are corrupted and not used",
215 ubi->corr_peb_count);
216 err = -ENOSPC;
217 goto out_unlock;
218 }
219 ubi->avail_pebs -= vol->reserved_pebs;
220 ubi->rsvd_pebs += vol->reserved_pebs;
221 spin_unlock(&ubi->volumes_lock);
222
223 vol->vol_id = vol_id;
224 vol->alignment = req->alignment;
225 vol->data_pad = ubi->leb_size % vol->alignment;
226 vol->vol_type = req->vol_type;
227 vol->name_len = req->name_len;
228 memcpy(vol->name, req->name, vol->name_len);
229 vol->ubi = ubi;
230
231
232
233
234
235 err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
236 if (err)
237 goto out_acc;
238
239 vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
240 if (!vol->eba_tbl) {
241 err = -ENOMEM;
242 goto out_acc;
243 }
244
245 for (i = 0; i < vol->reserved_pebs; i++)
246 vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
247
248 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
249 vol->used_ebs = vol->reserved_pebs;
250 vol->last_eb_bytes = vol->usable_leb_size;
251 vol->used_bytes =
252 (long long)vol->used_ebs * vol->usable_leb_size;
253 } else {
254 vol->used_ebs = div_u64_rem(vol->used_bytes,
255 vol->usable_leb_size,
256 &vol->last_eb_bytes);
257 if (vol->last_eb_bytes != 0)
258 vol->used_ebs += 1;
259 else
260 vol->last_eb_bytes = vol->usable_leb_size;
261 }
262
263
264 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
265 vol->cdev.owner = THIS_MODULE;
266 dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
267 err = cdev_add(&vol->cdev, dev, 1);
268 if (err) {
269 ubi_err(ubi, "cannot add character device");
270 goto out_mapping;
271 }
272
273 vol->dev.release = vol_release;
274 vol->dev.parent = &ubi->dev;
275 vol->dev.devt = dev;
276#ifndef __UBOOT__
277 vol->dev.class = &ubi_class;
278 vol->dev.groups = volume_dev_groups;
279#endif
280
281 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
282 err = device_register(&vol->dev);
283 if (err) {
284 ubi_err(ubi, "cannot register device");
285 goto out_cdev;
286 }
287
288
289 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
290 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
291 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
292 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
293 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
294 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
295 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
296 else
297 vtbl_rec.vol_type = UBI_VID_STATIC;
298 memcpy(vtbl_rec.name, vol->name, vol->name_len);
299
300 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
301 if (err)
302 goto out_sysfs;
303
304 spin_lock(&ubi->volumes_lock);
305 ubi->volumes[vol_id] = vol;
306 ubi->vol_count += 1;
307 spin_unlock(&ubi->volumes_lock);
308
309 ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED);
310 self_check_volumes(ubi);
311 return err;
312
313out_sysfs:
314
315
316
317
318
319
320
321
322 do_free = 0;
323 get_device(&vol->dev);
324 device_unregister(&vol->dev);
325out_cdev:
326 cdev_del(&vol->cdev);
327out_mapping:
328 if (do_free)
329 kfree(vol->eba_tbl);
330out_acc:
331 spin_lock(&ubi->volumes_lock);
332 ubi->rsvd_pebs -= vol->reserved_pebs;
333 ubi->avail_pebs += vol->reserved_pebs;
334out_unlock:
335 spin_unlock(&ubi->volumes_lock);
336 if (do_free)
337 kfree(vol);
338 else
339 put_device(&vol->dev);
340 ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err);
341 return err;
342}
343
344
345
346
347
348
349
350
351
352
353
354int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
355{
356 struct ubi_volume *vol = desc->vol;
357 struct ubi_device *ubi = vol->ubi;
358 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
359
360 dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);
361 ubi_assert(desc->mode == UBI_EXCLUSIVE);
362 ubi_assert(vol == ubi->volumes[vol_id]);
363
364 if (ubi->ro_mode)
365 return -EROFS;
366
367 spin_lock(&ubi->volumes_lock);
368 if (vol->ref_count > 1) {
369
370
371
372
373 err = -EBUSY;
374 goto out_unlock;
375 }
376 ubi->volumes[vol_id] = NULL;
377 spin_unlock(&ubi->volumes_lock);
378
379 if (!no_vtbl) {
380 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
381 if (err)
382 goto out_err;
383 }
384
385 for (i = 0; i < vol->reserved_pebs; i++) {
386 err = ubi_eba_unmap_leb(ubi, vol, i);
387 if (err)
388 goto out_err;
389 }
390
391 cdev_del(&vol->cdev);
392 device_unregister(&vol->dev);
393
394 spin_lock(&ubi->volumes_lock);
395 ubi->rsvd_pebs -= reserved_pebs;
396 ubi->avail_pebs += reserved_pebs;
397 ubi_update_reserved(ubi);
398 ubi->vol_count -= 1;
399 spin_unlock(&ubi->volumes_lock);
400
401 ubi_volume_notify(ubi, vol, UBI_VOLUME_REMOVED);
402 if (!no_vtbl)
403 self_check_volumes(ubi);
404
405 return err;
406
407out_err:
408 ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err);
409 spin_lock(&ubi->volumes_lock);
410 ubi->volumes[vol_id] = vol;
411out_unlock:
412 spin_unlock(&ubi->volumes_lock);
413 return err;
414}
415
416
417
418
419
420
421
422
423
424
425int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
426{
427 int i, err, pebs, *new_mapping;
428 struct ubi_volume *vol = desc->vol;
429 struct ubi_device *ubi = vol->ubi;
430 struct ubi_vtbl_record vtbl_rec;
431 int vol_id = vol->vol_id;
432
433 if (ubi->ro_mode)
434 return -EROFS;
435
436 dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",
437 ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs);
438
439 if (vol->vol_type == UBI_STATIC_VOLUME &&
440 reserved_pebs < vol->used_ebs) {
441 ubi_err(ubi, "too small size %d, %d LEBs contain data",
442 reserved_pebs, vol->used_ebs);
443 return -EINVAL;
444 }
445
446
447 if (reserved_pebs == vol->reserved_pebs)
448 return 0;
449
450 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
451 if (!new_mapping)
452 return -ENOMEM;
453
454 for (i = 0; i < reserved_pebs; i++)
455 new_mapping[i] = UBI_LEB_UNMAPPED;
456
457 spin_lock(&ubi->volumes_lock);
458 if (vol->ref_count > 1) {
459 spin_unlock(&ubi->volumes_lock);
460 err = -EBUSY;
461 goto out_free;
462 }
463 spin_unlock(&ubi->volumes_lock);
464
465
466 pebs = reserved_pebs - vol->reserved_pebs;
467 if (pebs > 0) {
468 spin_lock(&ubi->volumes_lock);
469 if (pebs > ubi->avail_pebs) {
470 ubi_err(ubi, "not enough PEBs: requested %d, available %d",
471 pebs, ubi->avail_pebs);
472 if (ubi->corr_peb_count)
473 ubi_err(ubi, "%d PEBs are corrupted and not used",
474 ubi->corr_peb_count);
475 spin_unlock(&ubi->volumes_lock);
476 err = -ENOSPC;
477 goto out_free;
478 }
479 ubi->avail_pebs -= pebs;
480 ubi->rsvd_pebs += pebs;
481 for (i = 0; i < vol->reserved_pebs; i++)
482 new_mapping[i] = vol->eba_tbl[i];
483 kfree(vol->eba_tbl);
484 vol->eba_tbl = new_mapping;
485 spin_unlock(&ubi->volumes_lock);
486 }
487
488
489 vtbl_rec = ubi->vtbl[vol_id];
490 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
491 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
492 if (err)
493 goto out_acc;
494
495 if (pebs < 0) {
496 for (i = 0; i < -pebs; i++) {
497 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
498 if (err)
499 goto out_acc;
500 }
501 spin_lock(&ubi->volumes_lock);
502 ubi->rsvd_pebs += pebs;
503 ubi->avail_pebs -= pebs;
504 ubi_update_reserved(ubi);
505 for (i = 0; i < reserved_pebs; i++)
506 new_mapping[i] = vol->eba_tbl[i];
507 kfree(vol->eba_tbl);
508 vol->eba_tbl = new_mapping;
509 spin_unlock(&ubi->volumes_lock);
510 }
511
512 vol->reserved_pebs = reserved_pebs;
513 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
514 vol->used_ebs = reserved_pebs;
515 vol->last_eb_bytes = vol->usable_leb_size;
516 vol->used_bytes =
517 (long long)vol->used_ebs * vol->usable_leb_size;
518 }
519
520 ubi_volume_notify(ubi, vol, UBI_VOLUME_RESIZED);
521 self_check_volumes(ubi);
522 return err;
523
524out_acc:
525 if (pebs > 0) {
526 spin_lock(&ubi->volumes_lock);
527 ubi->rsvd_pebs -= pebs;
528 ubi->avail_pebs += pebs;
529 spin_unlock(&ubi->volumes_lock);
530 }
531out_free:
532 kfree(new_mapping);
533 return err;
534}
535
536
537
538
539
540
541
542
543
544
545int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
546{
547 int err;
548 struct ubi_rename_entry *re;
549
550 err = ubi_vtbl_rename_volumes(ubi, rename_list);
551 if (err)
552 return err;
553
554 list_for_each_entry(re, rename_list, list) {
555 if (re->remove) {
556 err = ubi_remove_volume(re->desc, 1);
557 if (err)
558 break;
559 } else {
560 struct ubi_volume *vol = re->desc->vol;
561
562 spin_lock(&ubi->volumes_lock);
563 vol->name_len = re->new_name_len;
564 memcpy(vol->name, re->new_name, re->new_name_len + 1);
565 spin_unlock(&ubi->volumes_lock);
566 ubi_volume_notify(ubi, vol, UBI_VOLUME_RENAMED);
567 }
568 }
569
570 if (!err)
571 self_check_volumes(ubi);
572 return err;
573}
574
575
576
577
578
579
580
581
582
583
584int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
585{
586 int err, vol_id = vol->vol_id;
587 dev_t dev;
588
589 dbg_gen("add volume %d", vol_id);
590
591
592 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
593 vol->cdev.owner = THIS_MODULE;
594 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
595 err = cdev_add(&vol->cdev, dev, 1);
596 if (err) {
597 ubi_err(ubi, "cannot add character device for volume %d, error %d",
598 vol_id, err);
599 return err;
600 }
601
602 vol->dev.release = vol_release;
603 vol->dev.parent = &ubi->dev;
604 vol->dev.devt = dev;
605#ifndef __UBOOT__
606 vol->dev.class = &ubi_class;
607 vol->dev.groups = volume_dev_groups;
608#endif
609 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
610 err = device_register(&vol->dev);
611 if (err)
612 goto out_cdev;
613
614 self_check_volumes(ubi);
615 return err;
616
617out_cdev:
618 cdev_del(&vol->cdev);
619 return err;
620}
621
622
623
624
625
626
627
628
629
630void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
631{
632 dbg_gen("free volume %d", vol->vol_id);
633
634 ubi->volumes[vol->vol_id] = NULL;
635 cdev_del(&vol->cdev);
636 device_unregister(&vol->dev);
637}
638
639
640
641
642
643
644
645
646static int self_check_volume(struct ubi_device *ubi, int vol_id)
647{
648 int idx = vol_id2idx(ubi, vol_id);
649 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
650 const struct ubi_volume *vol;
651 long long n;
652 const char *name;
653
654 spin_lock(&ubi->volumes_lock);
655 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
656 vol = ubi->volumes[idx];
657
658 if (!vol) {
659 if (reserved_pebs) {
660 ubi_err(ubi, "no volume info, but volume exists");
661 goto fail;
662 }
663 spin_unlock(&ubi->volumes_lock);
664 return 0;
665 }
666
667 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
668 vol->name_len < 0) {
669 ubi_err(ubi, "negative values");
670 goto fail;
671 }
672 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
673 ubi_err(ubi, "bad alignment");
674 goto fail;
675 }
676
677 n = vol->alignment & (ubi->min_io_size - 1);
678 if (vol->alignment != 1 && n) {
679 ubi_err(ubi, "alignment is not multiple of min I/O unit");
680 goto fail;
681 }
682
683 n = ubi->leb_size % vol->alignment;
684 if (vol->data_pad != n) {
685 ubi_err(ubi, "bad data_pad, has to be %lld", n);
686 goto fail;
687 }
688
689 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
690 vol->vol_type != UBI_STATIC_VOLUME) {
691 ubi_err(ubi, "bad vol_type");
692 goto fail;
693 }
694
695 if (vol->upd_marker && vol->corrupted) {
696 ubi_err(ubi, "update marker and corrupted simultaneously");
697 goto fail;
698 }
699
700 if (vol->reserved_pebs > ubi->good_peb_count) {
701 ubi_err(ubi, "too large reserved_pebs");
702 goto fail;
703 }
704
705 n = ubi->leb_size - vol->data_pad;
706 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
707 ubi_err(ubi, "bad usable_leb_size, has to be %lld", n);
708 goto fail;
709 }
710
711 if (vol->name_len > UBI_VOL_NAME_MAX) {
712 ubi_err(ubi, "too long volume name, max is %d",
713 UBI_VOL_NAME_MAX);
714 goto fail;
715 }
716
717 n = strnlen(vol->name, vol->name_len + 1);
718 if (n != vol->name_len) {
719 ubi_err(ubi, "bad name_len %lld", n);
720 goto fail;
721 }
722
723 n = (long long)vol->used_ebs * vol->usable_leb_size;
724 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
725 if (vol->corrupted) {
726 ubi_err(ubi, "corrupted dynamic volume");
727 goto fail;
728 }
729 if (vol->used_ebs != vol->reserved_pebs) {
730 ubi_err(ubi, "bad used_ebs");
731 goto fail;
732 }
733 if (vol->last_eb_bytes != vol->usable_leb_size) {
734 ubi_err(ubi, "bad last_eb_bytes");
735 goto fail;
736 }
737 if (vol->used_bytes != n) {
738 ubi_err(ubi, "bad used_bytes");
739 goto fail;
740 }
741 } else {
742 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
743 ubi_err(ubi, "bad used_ebs");
744 goto fail;
745 }
746 if (vol->last_eb_bytes < 0 ||
747 vol->last_eb_bytes > vol->usable_leb_size) {
748 ubi_err(ubi, "bad last_eb_bytes");
749 goto fail;
750 }
751 if (vol->used_bytes < 0 || vol->used_bytes > n ||
752 vol->used_bytes < n - vol->usable_leb_size) {
753 ubi_err(ubi, "bad used_bytes");
754 goto fail;
755 }
756 }
757
758 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
759 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
760 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
761 upd_marker = ubi->vtbl[vol_id].upd_marker;
762 name = &ubi->vtbl[vol_id].name[0];
763 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
764 vol_type = UBI_DYNAMIC_VOLUME;
765 else
766 vol_type = UBI_STATIC_VOLUME;
767
768 if (alignment != vol->alignment || data_pad != vol->data_pad ||
769 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
770 name_len != vol->name_len || strncmp(name, vol->name, name_len)) {
771 ubi_err(ubi, "volume info is different");
772 goto fail;
773 }
774
775 spin_unlock(&ubi->volumes_lock);
776 return 0;
777
778fail:
779 ubi_err(ubi, "self-check failed for volume %d", vol_id);
780 if (vol)
781 ubi_dump_vol_info(vol);
782 ubi_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
783 dump_stack();
784 spin_unlock(&ubi->volumes_lock);
785 return -EINVAL;
786}
787
788
789
790
791
792
793
794static int self_check_volumes(struct ubi_device *ubi)
795{
796 int i, err = 0;
797
798 if (!ubi_dbg_chk_gen(ubi))
799 return 0;
800
801 for (i = 0; i < ubi->vtbl_slots; i++) {
802 err = self_check_volume(ubi, i);
803 if (err)
804 break;
805 }
806
807 return err;
808}
809