2 * Copyright (c) International Business Machines Corp., 2006
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 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * Author: Artem Bityutskiy (Битюцкий Артём)
22 * This file contains implementation of volume creation, deletion, updating and
26 #include <linux/err.h>
27 #include <linux/math64.h>
30 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
31 static int paranoid_check_volumes(struct ubi_device *ubi);
33 #define paranoid_check_volumes(ubi) 0
36 static ssize_t vol_attribute_show(struct device *dev,
37 struct device_attribute *attr, char *buf);
39 /* Device attributes corresponding to files in '/<sysfs>/class/ubi/ubiX_Y' */
40 static struct device_attribute attr_vol_reserved_ebs =
41 __ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL);
42 static struct device_attribute attr_vol_type =
43 __ATTR(type, S_IRUGO, vol_attribute_show, NULL);
44 static struct device_attribute attr_vol_name =
45 __ATTR(name, S_IRUGO, vol_attribute_show, NULL);
46 static struct device_attribute attr_vol_corrupted =
47 __ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL);
48 static struct device_attribute attr_vol_alignment =
49 __ATTR(alignment, S_IRUGO, vol_attribute_show, NULL);
50 static struct device_attribute attr_vol_usable_eb_size =
51 __ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL);
52 static struct device_attribute attr_vol_data_bytes =
53 __ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL);
54 static struct device_attribute attr_vol_upd_marker =
55 __ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL);
58 * "Show" method for files in '/<sysfs>/class/ubi/ubiX_Y/'.
60 * Consider a situation:
61 * A. process 1 opens a sysfs file related to volume Y, say
62 * /<sysfs>/class/ubi/ubiX_Y/reserved_ebs;
63 * B. process 2 removes volume Y;
64 * C. process 1 starts reading the /<sysfs>/class/ubi/ubiX_Y/reserved_ebs file;
66 * In this situation, this function will return %-ENODEV because it will find
67 * out that the volume was removed from the @ubi->volumes array.
69 static ssize_t vol_attribute_show(struct device *dev,
70 struct device_attribute *attr, char *buf)
73 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
74 struct ubi_device *ubi;
76 ubi = ubi_get_device(vol->ubi->ubi_num);
80 spin_lock(&ubi->volumes_lock);
81 if (!ubi->volumes[vol->vol_id]) {
82 spin_unlock(&ubi->volumes_lock);
86 /* Take a reference to prevent volume removal */
88 spin_unlock(&ubi->volumes_lock);
90 if (attr == &attr_vol_reserved_ebs)
91 ret = sprintf(buf, "%d\n", vol->reserved_pebs);
92 else if (attr == &attr_vol_type) {
95 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
99 ret = sprintf(buf, "%s\n", tp);
100 } else if (attr == &attr_vol_name)
101 ret = sprintf(buf, "%s\n", vol->name);
102 else if (attr == &attr_vol_corrupted)
103 ret = sprintf(buf, "%d\n", vol->corrupted);
104 else if (attr == &attr_vol_alignment)
105 ret = sprintf(buf, "%d\n", vol->alignment);
106 else if (attr == &attr_vol_usable_eb_size)
107 ret = sprintf(buf, "%d\n", vol->usable_leb_size);
108 else if (attr == &attr_vol_data_bytes)
109 ret = sprintf(buf, "%lld\n", vol->used_bytes);
110 else if (attr == &attr_vol_upd_marker)
111 ret = sprintf(buf, "%d\n", vol->upd_marker);
113 /* This must be a bug */
116 /* We've done the operation, drop volume and UBI device references */
117 spin_lock(&ubi->volumes_lock);
119 ubi_assert(vol->ref_count >= 0);
120 spin_unlock(&ubi->volumes_lock);
125 /* Release method for volume devices */
126 static void vol_release(struct device *dev)
128 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
135 * volume_sysfs_init - initialize sysfs for new volume.
136 * @ubi: UBI device description object
137 * @vol: volume description object
139 * This function returns zero in case of success and a negative error code in
142 * Note, this function does not free allocated resources in case of failure -
143 * the caller does it. This is because this would cause release() here and the
146 static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol)
150 err = device_create_file(&vol->dev, &attr_vol_reserved_ebs);
153 err = device_create_file(&vol->dev, &attr_vol_type);
156 err = device_create_file(&vol->dev, &attr_vol_name);
159 err = device_create_file(&vol->dev, &attr_vol_corrupted);
162 err = device_create_file(&vol->dev, &attr_vol_alignment);
165 err = device_create_file(&vol->dev, &attr_vol_usable_eb_size);
168 err = device_create_file(&vol->dev, &attr_vol_data_bytes);
171 err = device_create_file(&vol->dev, &attr_vol_upd_marker);
176 * volume_sysfs_close - close sysfs for a volume.
177 * @vol: volume description object
179 static void volume_sysfs_close(struct ubi_volume *vol)
181 device_remove_file(&vol->dev, &attr_vol_upd_marker);
182 device_remove_file(&vol->dev, &attr_vol_data_bytes);
183 device_remove_file(&vol->dev, &attr_vol_usable_eb_size);
184 device_remove_file(&vol->dev, &attr_vol_alignment);
185 device_remove_file(&vol->dev, &attr_vol_corrupted);
186 device_remove_file(&vol->dev, &attr_vol_name);
187 device_remove_file(&vol->dev, &attr_vol_type);
188 device_remove_file(&vol->dev, &attr_vol_reserved_ebs);
189 device_unregister(&vol->dev);
193 * ubi_create_volume - create volume.
194 * @ubi: UBI device description object
195 * @req: volume creation request
197 * This function creates volume described by @req. If @req->vol_id id
198 * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
199 * and saves it in @req->vol_id. Returns zero in case of success and a negative
200 * error code in case of failure. Note, the caller has to have the
201 * @ubi->device_mutex locked.
203 int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
205 int i, err, vol_id = req->vol_id, do_free = 1;
206 struct ubi_volume *vol;
207 struct ubi_vtbl_record vtbl_rec;
213 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
217 spin_lock(&ubi->volumes_lock);
218 if (vol_id == UBI_VOL_NUM_AUTO) {
219 /* Find unused volume ID */
220 dbg_gen("search for vacant volume ID");
221 for (i = 0; i < ubi->vtbl_slots; i++)
222 if (!ubi->volumes[i]) {
227 if (vol_id == UBI_VOL_NUM_AUTO) {
228 dbg_err("out of volume IDs");
232 req->vol_id = vol_id;
235 dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",
236 ubi->ubi_num, vol_id, (unsigned long long)req->bytes,
237 (int)req->vol_type, req->name);
239 /* Ensure that this volume does not exist */
241 if (ubi->volumes[vol_id]) {
242 dbg_err("volume %d already exists", vol_id);
246 /* Ensure that the name is unique */
247 for (i = 0; i < ubi->vtbl_slots; i++)
248 if (ubi->volumes[i] &&
249 ubi->volumes[i]->name_len == req->name_len &&
250 !strcmp(ubi->volumes[i]->name, req->name)) {
251 dbg_err("volume \"%s\" exists (ID %d)", req->name, i);
255 /* Calculate how many eraseblocks are requested */
256 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
257 vol->reserved_pebs += div_u64(req->bytes + vol->usable_leb_size - 1,
258 vol->usable_leb_size);
260 /* Reserve physical eraseblocks */
261 if (vol->reserved_pebs > ubi->avail_pebs) {
262 dbg_err("not enough PEBs, only %d available", ubi->avail_pebs);
266 ubi->avail_pebs -= vol->reserved_pebs;
267 ubi->rsvd_pebs += vol->reserved_pebs;
268 spin_unlock(&ubi->volumes_lock);
270 vol->vol_id = vol_id;
271 vol->alignment = req->alignment;
272 vol->data_pad = ubi->leb_size % vol->alignment;
273 vol->vol_type = req->vol_type;
274 vol->name_len = req->name_len;
275 memcpy(vol->name, req->name, vol->name_len);
279 * Finish all pending erases because there may be some LEBs belonging
280 * to the same volume ID.
282 err = ubi_wl_flush(ubi);
286 vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
292 for (i = 0; i < vol->reserved_pebs; i++)
293 vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
295 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
296 vol->used_ebs = vol->reserved_pebs;
297 vol->last_eb_bytes = vol->usable_leb_size;
299 (long long)vol->used_ebs * vol->usable_leb_size;
301 vol->used_ebs = div_u64_rem(vol->used_bytes,
302 vol->usable_leb_size,
303 &vol->last_eb_bytes);
304 if (vol->last_eb_bytes != 0)
307 vol->last_eb_bytes = vol->usable_leb_size;
310 /* Register character device for the volume */
311 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
312 vol->cdev.owner = THIS_MODULE;
313 dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
314 err = cdev_add(&vol->cdev, dev, 1);
316 ubi_err("cannot add character device");
320 err = ubi_create_gluebi(ubi, vol);
324 vol->dev.release = vol_release;
325 vol->dev.parent = &ubi->dev;
327 vol->dev.class = ubi_class;
329 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
330 err = device_register(&vol->dev);
332 ubi_err("cannot register device");
336 err = volume_sysfs_init(ubi, vol);
340 /* Fill volume table record */
341 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
342 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
343 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
344 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
345 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
346 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
347 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
349 vtbl_rec.vol_type = UBI_VID_STATIC;
350 memcpy(vtbl_rec.name, vol->name, vol->name_len);
352 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
356 spin_lock(&ubi->volumes_lock);
357 ubi->volumes[vol_id] = vol;
359 spin_unlock(&ubi->volumes_lock);
361 if (paranoid_check_volumes(ubi))
362 dbg_err("check failed while creating volume %d", vol_id);
367 * We have registered our device, we should not free the volume
368 * description object in this function in case of an error - it is
369 * freed by the release function.
371 * Get device reference to prevent the release function from being
372 * called just after sysfs has been closed.
375 get_device(&vol->dev);
376 volume_sysfs_close(vol);
378 if (ubi_destroy_gluebi(vol))
379 dbg_err("cannot destroy gluebi for volume %d:%d",
380 ubi->ubi_num, vol_id);
382 cdev_del(&vol->cdev);
387 spin_lock(&ubi->volumes_lock);
388 ubi->rsvd_pebs -= vol->reserved_pebs;
389 ubi->avail_pebs += vol->reserved_pebs;
391 spin_unlock(&ubi->volumes_lock);
395 put_device(&vol->dev);
396 ubi_err("cannot create volume %d, error %d", vol_id, err);
401 * ubi_remove_volume - remove volume.
402 * @desc: volume descriptor
403 * @no_vtbl: do not change volume table if not zero
405 * This function removes volume described by @desc. The volume has to be opened
406 * in "exclusive" mode. Returns zero in case of success and a negative error
407 * code in case of failure. The caller has to have the @ubi->device_mutex
410 int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
412 struct ubi_volume *vol = desc->vol;
413 struct ubi_device *ubi = vol->ubi;
414 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
416 dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);
417 ubi_assert(desc->mode == UBI_EXCLUSIVE);
418 ubi_assert(vol == ubi->volumes[vol_id]);
423 spin_lock(&ubi->volumes_lock);
424 if (vol->ref_count > 1) {
426 * The volume is busy, probably someone is reading one of its
432 ubi->volumes[vol_id] = NULL;
433 spin_unlock(&ubi->volumes_lock);
435 err = ubi_destroy_gluebi(vol);
440 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
445 for (i = 0; i < vol->reserved_pebs; i++) {
446 err = ubi_eba_unmap_leb(ubi, vol, i);
451 cdev_del(&vol->cdev);
452 volume_sysfs_close(vol);
454 spin_lock(&ubi->volumes_lock);
455 ubi->rsvd_pebs -= reserved_pebs;
456 ubi->avail_pebs += reserved_pebs;
457 i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
459 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
460 ubi->avail_pebs -= i;
462 ubi->beb_rsvd_pebs += i;
464 ubi_msg("reserve more %d PEBs", i);
467 spin_unlock(&ubi->volumes_lock);
469 if (!no_vtbl && paranoid_check_volumes(ubi))
470 dbg_err("check failed while removing volume %d", vol_id);
475 ubi_err("cannot remove volume %d, error %d", vol_id, err);
476 spin_lock(&ubi->volumes_lock);
477 ubi->volumes[vol_id] = vol;
479 spin_unlock(&ubi->volumes_lock);
484 * ubi_resize_volume - re-size volume.
485 * @desc: volume descriptor
486 * @reserved_pebs: new size in physical eraseblocks
488 * This function re-sizes the volume and returns zero in case of success, and a
489 * negative error code in case of failure. The caller has to have the
490 * @ubi->device_mutex locked.
492 int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
494 int i, err, pebs, *new_mapping;
495 struct ubi_volume *vol = desc->vol;
496 struct ubi_device *ubi = vol->ubi;
497 struct ubi_vtbl_record vtbl_rec;
498 int vol_id = vol->vol_id;
503 dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",
504 ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs);
506 if (vol->vol_type == UBI_STATIC_VOLUME &&
507 reserved_pebs < vol->used_ebs) {
508 dbg_err("too small size %d, %d LEBs contain data",
509 reserved_pebs, vol->used_ebs);
513 /* If the size is the same, we have nothing to do */
514 if (reserved_pebs == vol->reserved_pebs)
517 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
521 for (i = 0; i < reserved_pebs; i++)
522 new_mapping[i] = UBI_LEB_UNMAPPED;
524 spin_lock(&ubi->volumes_lock);
525 if (vol->ref_count > 1) {
526 spin_unlock(&ubi->volumes_lock);
530 spin_unlock(&ubi->volumes_lock);
532 /* Reserve physical eraseblocks */
533 pebs = reserved_pebs - vol->reserved_pebs;
535 spin_lock(&ubi->volumes_lock);
536 if (pebs > ubi->avail_pebs) {
537 dbg_err("not enough PEBs: requested %d, available %d",
538 pebs, ubi->avail_pebs);
539 spin_unlock(&ubi->volumes_lock);
543 ubi->avail_pebs -= pebs;
544 ubi->rsvd_pebs += pebs;
545 for (i = 0; i < vol->reserved_pebs; i++)
546 new_mapping[i] = vol->eba_tbl[i];
548 vol->eba_tbl = new_mapping;
549 spin_unlock(&ubi->volumes_lock);
552 /* Change volume table record */
553 memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
554 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
555 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
560 for (i = 0; i < -pebs; i++) {
561 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
565 spin_lock(&ubi->volumes_lock);
566 ubi->rsvd_pebs += pebs;
567 ubi->avail_pebs -= pebs;
568 pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
570 pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs;
571 ubi->avail_pebs -= pebs;
572 ubi->rsvd_pebs += pebs;
573 ubi->beb_rsvd_pebs += pebs;
575 ubi_msg("reserve more %d PEBs", pebs);
577 for (i = 0; i < reserved_pebs; i++)
578 new_mapping[i] = vol->eba_tbl[i];
580 vol->eba_tbl = new_mapping;
581 spin_unlock(&ubi->volumes_lock);
584 vol->reserved_pebs = reserved_pebs;
585 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
586 vol->used_ebs = reserved_pebs;
587 vol->last_eb_bytes = vol->usable_leb_size;
589 (long long)vol->used_ebs * vol->usable_leb_size;
592 if (paranoid_check_volumes(ubi))
593 dbg_err("check failed while re-sizing volume %d", vol_id);
598 spin_lock(&ubi->volumes_lock);
599 ubi->rsvd_pebs -= pebs;
600 ubi->avail_pebs += pebs;
601 spin_unlock(&ubi->volumes_lock);
609 * ubi_rename_volumes - re-name UBI volumes.
610 * @ubi: UBI device description object
611 * @rename_list: list of &struct ubi_rename_entry objects
613 * This function re-names or removes volumes specified in the re-name list.
614 * Returns zero in case of success and a negative error code in case of
617 int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
620 struct ubi_rename_entry *re;
622 err = ubi_vtbl_rename_volumes(ubi, rename_list);
626 list_for_each_entry(re, rename_list, list) {
628 err = ubi_remove_volume(re->desc, 1);
632 struct ubi_volume *vol = re->desc->vol;
634 spin_lock(&ubi->volumes_lock);
635 vol->name_len = re->new_name_len;
636 memcpy(vol->name, re->new_name, re->new_name_len + 1);
637 spin_unlock(&ubi->volumes_lock);
641 if (!err && paranoid_check_volumes(ubi))
647 * ubi_add_volume - add volume.
648 * @ubi: UBI device description object
649 * @vol: volume description object
651 * This function adds an existing volume and initializes all its data
652 * structures. Returns zero in case of success and a negative error code in
655 int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
657 int err, vol_id = vol->vol_id;
660 dbg_gen("add volume %d", vol_id);
662 /* Register character device for the volume */
663 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
664 vol->cdev.owner = THIS_MODULE;
665 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
666 err = cdev_add(&vol->cdev, dev, 1);
668 ubi_err("cannot add character device for volume %d, error %d",
673 err = ubi_create_gluebi(ubi, vol);
677 vol->dev.release = vol_release;
678 vol->dev.parent = &ubi->dev;
680 vol->dev.class = ubi_class;
681 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
682 err = device_register(&vol->dev);
686 err = volume_sysfs_init(ubi, vol);
688 cdev_del(&vol->cdev);
689 err = ubi_destroy_gluebi(vol);
690 volume_sysfs_close(vol);
694 if (paranoid_check_volumes(ubi))
695 dbg_err("check failed while adding volume %d", vol_id);
699 err = ubi_destroy_gluebi(vol);
701 cdev_del(&vol->cdev);
706 * ubi_free_volume - free volume.
707 * @ubi: UBI device description object
708 * @vol: volume description object
710 * This function frees all resources for volume @vol but does not remove it.
711 * Used only when the UBI device is detached.
713 void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
717 dbg_gen("free volume %d", vol->vol_id);
719 ubi->volumes[vol->vol_id] = NULL;
720 err = ubi_destroy_gluebi(vol);
721 cdev_del(&vol->cdev);
722 volume_sysfs_close(vol);
725 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
728 * paranoid_check_volume - check volume information.
729 * @ubi: UBI device description object
732 * Returns zero if volume is all right and a a negative error code if not.
734 static int paranoid_check_volume(struct ubi_device *ubi, int vol_id)
736 int idx = vol_id2idx(ubi, vol_id);
737 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
738 const struct ubi_volume *vol;
742 spin_lock(&ubi->volumes_lock);
743 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
744 vol = ubi->volumes[idx];
748 ubi_err("no volume info, but volume exists");
751 spin_unlock(&ubi->volumes_lock);
755 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
757 ubi_err("negative values");
760 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
761 ubi_err("bad alignment");
765 n = vol->alignment & (ubi->min_io_size - 1);
766 if (vol->alignment != 1 && n) {
767 ubi_err("alignment is not multiple of min I/O unit");
771 n = ubi->leb_size % vol->alignment;
772 if (vol->data_pad != n) {
773 ubi_err("bad data_pad, has to be %lld", n);
777 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
778 vol->vol_type != UBI_STATIC_VOLUME) {
779 ubi_err("bad vol_type");
783 if (vol->upd_marker && vol->corrupted) {
784 dbg_err("update marker and corrupted simultaneously");
788 if (vol->reserved_pebs > ubi->good_peb_count) {
789 ubi_err("too large reserved_pebs");
793 n = ubi->leb_size - vol->data_pad;
794 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
795 ubi_err("bad usable_leb_size, has to be %lld", n);
799 if (vol->name_len > UBI_VOL_NAME_MAX) {
800 ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
805 ubi_err("NULL volume name");
809 n = strnlen(vol->name, vol->name_len + 1);
810 if (n != vol->name_len) {
811 ubi_err("bad name_len %lld", n);
815 n = (long long)vol->used_ebs * vol->usable_leb_size;
816 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
817 if (vol->corrupted) {
818 ubi_err("corrupted dynamic volume");
821 if (vol->used_ebs != vol->reserved_pebs) {
822 ubi_err("bad used_ebs");
825 if (vol->last_eb_bytes != vol->usable_leb_size) {
826 ubi_err("bad last_eb_bytes");
829 if (vol->used_bytes != n) {
830 ubi_err("bad used_bytes");
834 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
835 ubi_err("bad used_ebs");
838 if (vol->last_eb_bytes < 0 ||
839 vol->last_eb_bytes > vol->usable_leb_size) {
840 ubi_err("bad last_eb_bytes");
843 if (vol->used_bytes < 0 || vol->used_bytes > n ||
844 vol->used_bytes < n - vol->usable_leb_size) {
845 ubi_err("bad used_bytes");
850 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
851 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
852 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
853 upd_marker = ubi->vtbl[vol_id].upd_marker;
854 name = &ubi->vtbl[vol_id].name[0];
855 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
856 vol_type = UBI_DYNAMIC_VOLUME;
858 vol_type = UBI_STATIC_VOLUME;
860 if (alignment != vol->alignment || data_pad != vol->data_pad ||
861 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
862 name_len != vol->name_len || strncmp(name, vol->name, name_len)) {
863 ubi_err("volume info is different");
867 spin_unlock(&ubi->volumes_lock);
871 ubi_err("paranoid check failed for volume %d", vol_id);
873 ubi_dbg_dump_vol_info(vol);
874 ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
876 spin_unlock(&ubi->volumes_lock);
881 * paranoid_check_volumes - check information about all volumes.
882 * @ubi: UBI device description object
884 * Returns zero if volumes are all right and a a negative error code if not.
886 static int paranoid_check_volumes(struct ubi_device *ubi)
890 for (i = 0; i < ubi->vtbl_slots; i++) {
891 err = paranoid_check_volume(ubi, i);