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26#ifdef UBI_LINUX
27#include <linux/err.h>
28#include <asm/div64.h>
29#endif
30
31#include <ubi_uboot.h>
32#include "ubi.h"
33
34#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
35static void paranoid_check_volumes(struct ubi_device *ubi);
36#else
37#define paranoid_check_volumes(ubi)
38#endif
39
40#ifdef UBI_LINUX
41static ssize_t vol_attribute_show(struct device *dev,
42 struct device_attribute *attr, char *buf);
43
44
45static struct device_attribute attr_vol_reserved_ebs =
46 __ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL);
47static struct device_attribute attr_vol_type =
48 __ATTR(type, S_IRUGO, vol_attribute_show, NULL);
49static struct device_attribute attr_vol_name =
50 __ATTR(name, S_IRUGO, vol_attribute_show, NULL);
51static struct device_attribute attr_vol_corrupted =
52 __ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL);
53static struct device_attribute attr_vol_alignment =
54 __ATTR(alignment, S_IRUGO, vol_attribute_show, NULL);
55static struct device_attribute attr_vol_usable_eb_size =
56 __ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL);
57static struct device_attribute attr_vol_data_bytes =
58 __ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL);
59static struct device_attribute attr_vol_upd_marker =
60 __ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL);
61
62
63
64
65
66
67
68
69
70
71
72
73
74static ssize_t vol_attribute_show(struct device *dev,
75 struct device_attribute *attr, char *buf)
76{
77 int ret;
78 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
79 struct ubi_device *ubi;
80
81 ubi = ubi_get_device(vol->ubi->ubi_num);
82 if (!ubi)
83 return -ENODEV;
84
85 spin_lock(&ubi->volumes_lock);
86 if (!ubi->volumes[vol->vol_id]) {
87 spin_unlock(&ubi->volumes_lock);
88 ubi_put_device(ubi);
89 return -ENODEV;
90 }
91
92 vol->ref_count += 1;
93 spin_unlock(&ubi->volumes_lock);
94
95 if (attr == &attr_vol_reserved_ebs)
96 ret = sprintf(buf, "%d\n", vol->reserved_pebs);
97 else if (attr == &attr_vol_type) {
98 const char *tp;
99
100 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
101 tp = "dynamic";
102 else
103 tp = "static";
104 ret = sprintf(buf, "%s\n", tp);
105 } else if (attr == &attr_vol_name)
106 ret = sprintf(buf, "%s\n", vol->name);
107 else if (attr == &attr_vol_corrupted)
108 ret = sprintf(buf, "%d\n", vol->corrupted);
109 else if (attr == &attr_vol_alignment)
110 ret = sprintf(buf, "%d\n", vol->alignment);
111 else if (attr == &attr_vol_usable_eb_size)
112 ret = sprintf(buf, "%d\n", vol->usable_leb_size);
113 else if (attr == &attr_vol_data_bytes)
114 ret = sprintf(buf, "%lld\n", vol->used_bytes);
115 else if (attr == &attr_vol_upd_marker)
116 ret = sprintf(buf, "%d\n", vol->upd_marker);
117 else
118
119 ret = -EINVAL;
120
121
122 spin_lock(&ubi->volumes_lock);
123 vol->ref_count -= 1;
124 ubi_assert(vol->ref_count >= 0);
125 spin_unlock(&ubi->volumes_lock);
126 ubi_put_device(ubi);
127 return ret;
128}
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);
137}
138
139#ifdef UBI_LINUX
140
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149
150
151
152static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol)
153{
154 int err;
155
156 err = device_create_file(&vol->dev, &attr_vol_reserved_ebs);
157 if (err)
158 return err;
159 err = device_create_file(&vol->dev, &attr_vol_type);
160 if (err)
161 return err;
162 err = device_create_file(&vol->dev, &attr_vol_name);
163 if (err)
164 return err;
165 err = device_create_file(&vol->dev, &attr_vol_corrupted);
166 if (err)
167 return err;
168 err = device_create_file(&vol->dev, &attr_vol_alignment);
169 if (err)
170 return err;
171 err = device_create_file(&vol->dev, &attr_vol_usable_eb_size);
172 if (err)
173 return err;
174 err = device_create_file(&vol->dev, &attr_vol_data_bytes);
175 if (err)
176 return err;
177 err = device_create_file(&vol->dev, &attr_vol_upd_marker);
178 return err;
179}
180
181
182
183
184
185static void volume_sysfs_close(struct ubi_volume *vol)
186{
187 device_remove_file(&vol->dev, &attr_vol_upd_marker);
188 device_remove_file(&vol->dev, &attr_vol_data_bytes);
189 device_remove_file(&vol->dev, &attr_vol_usable_eb_size);
190 device_remove_file(&vol->dev, &attr_vol_alignment);
191 device_remove_file(&vol->dev, &attr_vol_corrupted);
192 device_remove_file(&vol->dev, &attr_vol_name);
193 device_remove_file(&vol->dev, &attr_vol_type);
194 device_remove_file(&vol->dev, &attr_vol_reserved_ebs);
195 device_unregister(&vol->dev);
196}
197#endif
198
199
200
201
202
203
204
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207
208
209
210int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
211{
212 int i, err, vol_id = req->vol_id, dont_free = 0;
213 struct ubi_volume *vol;
214 struct ubi_vtbl_record vtbl_rec;
215 uint64_t bytes;
216 dev_t dev;
217
218 if (ubi->ro_mode)
219 return -EROFS;
220
221 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
222 if (!vol)
223 return -ENOMEM;
224
225 spin_lock(&ubi->volumes_lock);
226 if (vol_id == UBI_VOL_NUM_AUTO) {
227
228 dbg_msg("search for vacant volume ID");
229 for (i = 0; i < ubi->vtbl_slots; i++)
230 if (!ubi->volumes[i]) {
231 vol_id = i;
232 break;
233 }
234
235 if (vol_id == UBI_VOL_NUM_AUTO) {
236 dbg_err("out of volume IDs");
237 err = -ENFILE;
238 goto out_unlock;
239 }
240 req->vol_id = vol_id;
241 }
242
243 dbg_msg("volume ID %d, %llu bytes, type %d, name %s",
244 vol_id, (unsigned long long)req->bytes,
245 (int)req->vol_type, req->name);
246
247
248 err = -EEXIST;
249 if (ubi->volumes[vol_id]) {
250 dbg_err("volume %d already exists", vol_id);
251 goto out_unlock;
252 }
253
254
255 for (i = 0; i < ubi->vtbl_slots; i++)
256 if (ubi->volumes[i] &&
257 ubi->volumes[i]->name_len == req->name_len &&
258 !strcmp(ubi->volumes[i]->name, req->name)) {
259 dbg_err("volume \"%s\" exists (ID %d)", req->name, i);
260 goto out_unlock;
261 }
262
263
264 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
265 bytes = req->bytes;
266 if (do_div(bytes, vol->usable_leb_size))
267 vol->reserved_pebs = 1;
268 vol->reserved_pebs += bytes;
269
270
271 if (vol->reserved_pebs > ubi->avail_pebs) {
272 dbg_err("not enough PEBs, only %d available", ubi->avail_pebs);
273 err = -ENOSPC;
274 goto out_unlock;
275 }
276 ubi->avail_pebs -= vol->reserved_pebs;
277 ubi->rsvd_pebs += vol->reserved_pebs;
278 spin_unlock(&ubi->volumes_lock);
279
280 vol->vol_id = vol_id;
281 vol->alignment = req->alignment;
282 vol->data_pad = ubi->leb_size % vol->alignment;
283 vol->vol_type = req->vol_type;
284 vol->name_len = req->name_len;
285 memcpy(vol->name, req->name, vol->name_len + 1);
286 vol->ubi = ubi;
287
288
289
290
291
292 err = ubi_wl_flush(ubi);
293 if (err)
294 goto out_acc;
295
296 vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
297 if (!vol->eba_tbl) {
298 err = -ENOMEM;
299 goto out_acc;
300 }
301
302 for (i = 0; i < vol->reserved_pebs; i++)
303 vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
304
305 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
306 vol->used_ebs = vol->reserved_pebs;
307 vol->last_eb_bytes = vol->usable_leb_size;
308 vol->used_bytes =
309 (long long)vol->used_ebs * vol->usable_leb_size;
310 } else {
311 bytes = vol->used_bytes;
312 vol->last_eb_bytes = do_div(bytes, vol->usable_leb_size);
313 vol->used_ebs = bytes;
314 if (vol->last_eb_bytes)
315 vol->used_ebs += 1;
316 else
317 vol->last_eb_bytes = vol->usable_leb_size;
318 }
319
320
321 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
322 vol->cdev.owner = THIS_MODULE;
323 dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
324 err = cdev_add(&vol->cdev, dev, 1);
325 if (err) {
326 ubi_err("cannot add character device");
327 goto out_mapping;
328 }
329
330 err = ubi_create_gluebi(ubi, vol);
331 if (err)
332 goto out_cdev;
333
334 vol->dev.release = vol_release;
335 vol->dev.parent = &ubi->dev;
336 vol->dev.devt = dev;
337 vol->dev.class = ubi_class;
338
339 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
340 err = device_register(&vol->dev);
341 if (err) {
342 ubi_err("cannot register device");
343 goto out_gluebi;
344 }
345
346 err = volume_sysfs_init(ubi, vol);
347 if (err)
348 goto out_sysfs;
349
350
351 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
352 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
353 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
354 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
355 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
356 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
357 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
358 else
359 vtbl_rec.vol_type = UBI_VID_STATIC;
360 memcpy(vtbl_rec.name, vol->name, vol->name_len + 1);
361
362 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
363 if (err)
364 goto out_sysfs;
365
366 spin_lock(&ubi->volumes_lock);
367 ubi->volumes[vol_id] = vol;
368 ubi->vol_count += 1;
369 spin_unlock(&ubi->volumes_lock);
370
371 paranoid_check_volumes(ubi);
372 return 0;
373
374out_sysfs:
375
376
377
378
379
380
381
382
383 dont_free = 1;
384 get_device(&vol->dev);
385 volume_sysfs_close(vol);
386out_gluebi:
387 if (ubi_destroy_gluebi(vol))
388 dbg_err("cannot destroy gluebi for volume %d:%d",
389 ubi->ubi_num, vol_id);
390out_cdev:
391 cdev_del(&vol->cdev);
392out_mapping:
393 kfree(vol->eba_tbl);
394out_acc:
395 spin_lock(&ubi->volumes_lock);
396 ubi->rsvd_pebs -= vol->reserved_pebs;
397 ubi->avail_pebs += vol->reserved_pebs;
398out_unlock:
399 spin_unlock(&ubi->volumes_lock);
400 if (dont_free)
401 put_device(&vol->dev);
402 else
403 kfree(vol);
404 ubi_err("cannot create volume %d, error %d", vol_id, err);
405 return err;
406}
407
408
409
410
411
412
413
414
415
416
417int ubi_remove_volume(struct ubi_volume_desc *desc)
418{
419 struct ubi_volume *vol = desc->vol;
420 struct ubi_device *ubi = vol->ubi;
421 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
422
423 dbg_msg("remove UBI volume %d", vol_id);
424 ubi_assert(desc->mode == UBI_EXCLUSIVE);
425 ubi_assert(vol == ubi->volumes[vol_id]);
426
427 if (ubi->ro_mode)
428 return -EROFS;
429
430 spin_lock(&ubi->volumes_lock);
431 if (vol->ref_count > 1) {
432
433
434
435
436 err = -EBUSY;
437 goto out_unlock;
438 }
439 ubi->volumes[vol_id] = NULL;
440 spin_unlock(&ubi->volumes_lock);
441
442 err = ubi_destroy_gluebi(vol);
443 if (err)
444 goto out_err;
445
446 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
447 if (err)
448 goto out_err;
449
450 for (i = 0; i < vol->reserved_pebs; i++) {
451 err = ubi_eba_unmap_leb(ubi, vol, i);
452 if (err)
453 goto out_err;
454 }
455
456 kfree(vol->eba_tbl);
457 vol->eba_tbl = NULL;
458 cdev_del(&vol->cdev);
459 volume_sysfs_close(vol);
460
461 spin_lock(&ubi->volumes_lock);
462 ubi->rsvd_pebs -= reserved_pebs;
463 ubi->avail_pebs += reserved_pebs;
464 i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
465 if (i > 0) {
466 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
467 ubi->avail_pebs -= i;
468 ubi->rsvd_pebs += i;
469 ubi->beb_rsvd_pebs += i;
470 if (i > 0)
471 ubi_msg("reserve more %d PEBs", i);
472 }
473 ubi->vol_count -= 1;
474 spin_unlock(&ubi->volumes_lock);
475
476 paranoid_check_volumes(ubi);
477 return 0;
478
479out_err:
480 ubi_err("cannot remove volume %d, error %d", vol_id, err);
481 spin_lock(&ubi->volumes_lock);
482 ubi->volumes[vol_id] = vol;
483out_unlock:
484 spin_unlock(&ubi->volumes_lock);
485 return err;
486}
487
488
489
490
491
492
493
494
495
496
497int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
498{
499 int i, err, pebs, *new_mapping;
500 struct ubi_volume *vol = desc->vol;
501 struct ubi_device *ubi = vol->ubi;
502 struct ubi_vtbl_record vtbl_rec;
503 int vol_id = vol->vol_id;
504
505 if (ubi->ro_mode)
506 return -EROFS;
507
508 dbg_msg("re-size volume %d to from %d to %d PEBs",
509 vol_id, vol->reserved_pebs, reserved_pebs);
510
511 if (vol->vol_type == UBI_STATIC_VOLUME &&
512 reserved_pebs < vol->used_ebs) {
513 dbg_err("too small size %d, %d LEBs contain data",
514 reserved_pebs, vol->used_ebs);
515 return -EINVAL;
516 }
517
518
519 if (reserved_pebs == vol->reserved_pebs)
520 return 0;
521
522 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
523 if (!new_mapping)
524 return -ENOMEM;
525
526 for (i = 0; i < reserved_pebs; i++)
527 new_mapping[i] = UBI_LEB_UNMAPPED;
528
529 spin_lock(&ubi->volumes_lock);
530 if (vol->ref_count > 1) {
531 spin_unlock(&ubi->volumes_lock);
532 err = -EBUSY;
533 goto out_free;
534 }
535 spin_unlock(&ubi->volumes_lock);
536
537
538 pebs = reserved_pebs - vol->reserved_pebs;
539 if (pebs > 0) {
540 spin_lock(&ubi->volumes_lock);
541 if (pebs > ubi->avail_pebs) {
542 dbg_err("not enough PEBs: requested %d, available %d",
543 pebs, ubi->avail_pebs);
544 spin_unlock(&ubi->volumes_lock);
545 err = -ENOSPC;
546 goto out_free;
547 }
548 ubi->avail_pebs -= pebs;
549 ubi->rsvd_pebs += pebs;
550 for (i = 0; i < vol->reserved_pebs; i++)
551 new_mapping[i] = vol->eba_tbl[i];
552 kfree(vol->eba_tbl);
553 vol->eba_tbl = new_mapping;
554 spin_unlock(&ubi->volumes_lock);
555 }
556
557
558 memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
559 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
560 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
561 if (err)
562 goto out_acc;
563
564 if (pebs < 0) {
565 for (i = 0; i < -pebs; i++) {
566 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
567 if (err)
568 goto out_acc;
569 }
570 spin_lock(&ubi->volumes_lock);
571 ubi->rsvd_pebs += pebs;
572 ubi->avail_pebs -= pebs;
573 pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
574 if (pebs > 0) {
575 pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs;
576 ubi->avail_pebs -= pebs;
577 ubi->rsvd_pebs += pebs;
578 ubi->beb_rsvd_pebs += pebs;
579 if (pebs > 0)
580 ubi_msg("reserve more %d PEBs", pebs);
581 }
582 for (i = 0; i < reserved_pebs; i++)
583 new_mapping[i] = vol->eba_tbl[i];
584 kfree(vol->eba_tbl);
585 vol->eba_tbl = new_mapping;
586 spin_unlock(&ubi->volumes_lock);
587 }
588
589 vol->reserved_pebs = reserved_pebs;
590 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
591 vol->used_ebs = reserved_pebs;
592 vol->last_eb_bytes = vol->usable_leb_size;
593 vol->used_bytes =
594 (long long)vol->used_ebs * vol->usable_leb_size;
595 }
596
597 paranoid_check_volumes(ubi);
598 return 0;
599
600out_acc:
601 if (pebs > 0) {
602 spin_lock(&ubi->volumes_lock);
603 ubi->rsvd_pebs -= pebs;
604 ubi->avail_pebs += pebs;
605 spin_unlock(&ubi->volumes_lock);
606 }
607out_free:
608 kfree(new_mapping);
609 return err;
610}
611
612
613
614
615
616
617
618
619
620
621int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
622{
623 int err, vol_id = vol->vol_id;
624 dev_t dev;
625
626 dbg_msg("add volume %d", vol_id);
627 ubi_dbg_dump_vol_info(vol);
628
629
630 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
631 vol->cdev.owner = THIS_MODULE;
632 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
633 err = cdev_add(&vol->cdev, dev, 1);
634 if (err) {
635 ubi_err("cannot add character device for volume %d, error %d",
636 vol_id, err);
637 return err;
638 }
639
640 err = ubi_create_gluebi(ubi, vol);
641 if (err)
642 goto out_cdev;
643
644 vol->dev.release = vol_release;
645 vol->dev.parent = &ubi->dev;
646 vol->dev.devt = dev;
647 vol->dev.class = ubi_class;
648 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
649 err = device_register(&vol->dev);
650 if (err)
651 goto out_gluebi;
652
653 err = volume_sysfs_init(ubi, vol);
654 if (err) {
655 cdev_del(&vol->cdev);
656 err = ubi_destroy_gluebi(vol);
657 volume_sysfs_close(vol);
658 return err;
659 }
660
661 paranoid_check_volumes(ubi);
662 return 0;
663
664out_gluebi:
665 err = ubi_destroy_gluebi(vol);
666out_cdev:
667 cdev_del(&vol->cdev);
668 return err;
669}
670
671
672
673
674
675
676
677
678
679void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
680{
681 int err;
682
683 dbg_msg("free volume %d", vol->vol_id);
684
685 ubi->volumes[vol->vol_id] = NULL;
686 err = ubi_destroy_gluebi(vol);
687 cdev_del(&vol->cdev);
688 volume_sysfs_close(vol);
689}
690
691#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
692
693
694
695
696
697
698static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
699{
700 int idx = vol_id2idx(ubi, vol_id);
701 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
702 const struct ubi_volume *vol;
703 long long n;
704 const char *name;
705
706 spin_lock(&ubi->volumes_lock);
707 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
708 vol = ubi->volumes[idx];
709
710 if (!vol) {
711 if (reserved_pebs) {
712 ubi_err("no volume info, but volume exists");
713 goto fail;
714 }
715 spin_unlock(&ubi->volumes_lock);
716 return;
717 }
718
719 if (vol->exclusive) {
720
721
722
723
724 spin_unlock(&ubi->volumes_lock);
725 return;
726 }
727
728 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
729 vol->name_len < 0) {
730 ubi_err("negative values");
731 goto fail;
732 }
733 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
734 ubi_err("bad alignment");
735 goto fail;
736 }
737
738 n = vol->alignment & (ubi->min_io_size - 1);
739 if (vol->alignment != 1 && n) {
740 ubi_err("alignment is not multiple of min I/O unit");
741 goto fail;
742 }
743
744 n = ubi->leb_size % vol->alignment;
745 if (vol->data_pad != n) {
746 ubi_err("bad data_pad, has to be %lld", n);
747 goto fail;
748 }
749
750 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
751 vol->vol_type != UBI_STATIC_VOLUME) {
752 ubi_err("bad vol_type");
753 goto fail;
754 }
755
756 if (vol->upd_marker && vol->corrupted) {
757 dbg_err("update marker and corrupted simultaneously");
758 goto fail;
759 }
760
761 if (vol->reserved_pebs > ubi->good_peb_count) {
762 ubi_err("too large reserved_pebs");
763 goto fail;
764 }
765
766 n = ubi->leb_size - vol->data_pad;
767 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
768 ubi_err("bad usable_leb_size, has to be %lld", n);
769 goto fail;
770 }
771
772 if (vol->name_len > UBI_VOL_NAME_MAX) {
773 ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
774 goto fail;
775 }
776
777 if (!vol->name) {
778 ubi_err("NULL volume name");
779 goto fail;
780 }
781
782 n = strnlen(vol->name, vol->name_len + 1);
783 if (n != vol->name_len) {
784 ubi_err("bad name_len %lld", n);
785 goto fail;
786 }
787
788 n = (long long)vol->used_ebs * vol->usable_leb_size;
789 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
790 if (vol->corrupted) {
791 ubi_err("corrupted dynamic volume");
792 goto fail;
793 }
794 if (vol->used_ebs != vol->reserved_pebs) {
795 ubi_err("bad used_ebs");
796 goto fail;
797 }
798 if (vol->last_eb_bytes != vol->usable_leb_size) {
799 ubi_err("bad last_eb_bytes");
800 goto fail;
801 }
802 if (vol->used_bytes != n) {
803 ubi_err("bad used_bytes");
804 goto fail;
805 }
806 } else {
807 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
808 ubi_err("bad used_ebs");
809 goto fail;
810 }
811 if (vol->last_eb_bytes < 0 ||
812 vol->last_eb_bytes > vol->usable_leb_size) {
813 ubi_err("bad last_eb_bytes");
814 goto fail;
815 }
816 if (vol->used_bytes < 0 || vol->used_bytes > n ||
817 vol->used_bytes < n - vol->usable_leb_size) {
818 ubi_err("bad used_bytes");
819 goto fail;
820 }
821 }
822
823 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
824 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
825 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
826 upd_marker = ubi->vtbl[vol_id].upd_marker;
827 name = &ubi->vtbl[vol_id].name[0];
828 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
829 vol_type = UBI_DYNAMIC_VOLUME;
830 else
831 vol_type = UBI_STATIC_VOLUME;
832
833 if (alignment != vol->alignment || data_pad != vol->data_pad ||
834 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
835 name_len!= vol->name_len || strncmp(name, vol->name, name_len)) {
836 ubi_err("volume info is different");
837 goto fail;
838 }
839
840 spin_unlock(&ubi->volumes_lock);
841 return;
842
843fail:
844 ubi_err("paranoid check failed for volume %d", vol_id);
845 ubi_dbg_dump_vol_info(vol);
846 ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
847 spin_unlock(&ubi->volumes_lock);
848 BUG();
849}
850
851
852
853
854
855static void paranoid_check_volumes(struct ubi_device *ubi)
856{
857 int i;
858
859 for (i = 0; i < ubi->vtbl_slots; i++)
860 paranoid_check_volume(ubi, i);
861}
862#endif
863