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>
28 #include <linux/slab.h>
29 #include <linux/export.h>
32 static int self_check_volumes(struct ubi_device *ubi);
34 static ssize_t vol_attribute_show(struct device *dev,
35 struct device_attribute *attr, char *buf);
37 /* Device attributes corresponding to files in '/<sysfs>/class/ubi/ubiX_Y' */
38 static struct device_attribute attr_vol_reserved_ebs =
39 __ATTR(reserved_ebs, S_IRUGO, vol_attribute_show, NULL);
40 static struct device_attribute attr_vol_type =
41 __ATTR(type, S_IRUGO, vol_attribute_show, NULL);
42 static struct device_attribute attr_vol_name =
43 __ATTR(name, S_IRUGO, vol_attribute_show, NULL);
44 static struct device_attribute attr_vol_corrupted =
45 __ATTR(corrupted, S_IRUGO, vol_attribute_show, NULL);
46 static struct device_attribute attr_vol_alignment =
47 __ATTR(alignment, S_IRUGO, vol_attribute_show, NULL);
48 static struct device_attribute attr_vol_usable_eb_size =
49 __ATTR(usable_eb_size, S_IRUGO, vol_attribute_show, NULL);
50 static struct device_attribute attr_vol_data_bytes =
51 __ATTR(data_bytes, S_IRUGO, vol_attribute_show, NULL);
52 static struct device_attribute attr_vol_upd_marker =
53 __ATTR(upd_marker, S_IRUGO, vol_attribute_show, NULL);
56 * "Show" method for files in '/<sysfs>/class/ubi/ubiX_Y/'.
58 * Consider a situation:
59 * A. process 1 opens a sysfs file related to volume Y, say
60 * /<sysfs>/class/ubi/ubiX_Y/reserved_ebs;
61 * B. process 2 removes volume Y;
62 * C. process 1 starts reading the /<sysfs>/class/ubi/ubiX_Y/reserved_ebs file;
64 * In this situation, this function will return %-ENODEV because it will find
65 * out that the volume was removed from the @ubi->volumes array.
67 static ssize_t vol_attribute_show(struct device *dev,
68 struct device_attribute *attr, char *buf)
71 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
72 struct ubi_device *ubi = vol->ubi;
74 spin_lock(&ubi->volumes_lock);
75 if (!ubi->volumes[vol->vol_id]) {
76 spin_unlock(&ubi->volumes_lock);
79 /* Take a reference to prevent volume removal */
81 spin_unlock(&ubi->volumes_lock);
83 if (attr == &attr_vol_reserved_ebs)
84 ret = sprintf(buf, "%d\n", vol->reserved_pebs);
85 else if (attr == &attr_vol_type) {
88 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
92 ret = sprintf(buf, "%s\n", tp);
93 } else if (attr == &attr_vol_name)
94 ret = sprintf(buf, "%s\n", vol->name);
95 else if (attr == &attr_vol_corrupted)
96 ret = sprintf(buf, "%d\n", vol->corrupted);
97 else if (attr == &attr_vol_alignment)
98 ret = sprintf(buf, "%d\n", vol->alignment);
99 else if (attr == &attr_vol_usable_eb_size)
100 ret = sprintf(buf, "%d\n", vol->usable_leb_size);
101 else if (attr == &attr_vol_data_bytes)
102 ret = sprintf(buf, "%lld\n", vol->used_bytes);
103 else if (attr == &attr_vol_upd_marker)
104 ret = sprintf(buf, "%d\n", vol->upd_marker);
106 /* This must be a bug */
109 /* We've done the operation, drop volume and UBI device references */
110 spin_lock(&ubi->volumes_lock);
112 ubi_assert(vol->ref_count >= 0);
113 spin_unlock(&ubi->volumes_lock);
117 static struct attribute *volume_dev_attrs[] = {
118 &attr_vol_reserved_ebs.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,
128 ATTRIBUTE_GROUPS(volume_dev);
130 /* Release method for volume devices */
131 static void vol_release(struct device *dev)
133 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
135 ubi_eba_replace_table(vol, NULL);
136 ubi_fastmap_destroy_checkmap(vol);
141 * ubi_create_volume - create volume.
142 * @ubi: UBI device description object
143 * @req: volume creation request
145 * This function creates volume described by @req. If @req->vol_id id
146 * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
147 * and saves it in @req->vol_id. Returns zero in case of success and a negative
148 * error code in case of failure. Note, the caller has to have the
149 * @ubi->device_mutex locked.
151 int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
153 int i, err, vol_id = req->vol_id;
154 struct ubi_volume *vol;
155 struct ubi_vtbl_record vtbl_rec;
156 struct ubi_eba_table *eba_tbl = NULL;
161 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
165 device_initialize(&vol->dev);
166 vol->dev.release = vol_release;
167 vol->dev.parent = &ubi->dev;
168 vol->dev.class = &ubi_class;
169 vol->dev.groups = volume_dev_groups;
171 spin_lock(&ubi->volumes_lock);
172 if (vol_id == UBI_VOL_NUM_AUTO) {
173 /* Find unused volume ID */
174 dbg_gen("search for vacant volume ID");
175 for (i = 0; i < ubi->vtbl_slots; i++)
176 if (!ubi->volumes[i]) {
181 if (vol_id == UBI_VOL_NUM_AUTO) {
182 ubi_err(ubi, "out of volume IDs");
186 req->vol_id = vol_id;
189 dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",
190 ubi->ubi_num, vol_id, (unsigned long long)req->bytes,
191 (int)req->vol_type, req->name);
193 /* Ensure that this volume does not exist */
195 if (ubi->volumes[vol_id]) {
196 ubi_err(ubi, "volume %d already exists", vol_id);
200 /* Ensure that the name is unique */
201 for (i = 0; i < ubi->vtbl_slots; i++)
202 if (ubi->volumes[i] &&
203 ubi->volumes[i]->name_len == req->name_len &&
204 !strcmp(ubi->volumes[i]->name, req->name)) {
205 ubi_err(ubi, "volume \"%s\" exists (ID %d)",
210 /* Calculate how many eraseblocks are requested */
211 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
212 vol->reserved_pebs = div_u64(req->bytes + vol->usable_leb_size - 1,
213 vol->usable_leb_size);
215 /* Reserve physical eraseblocks */
216 if (vol->reserved_pebs > ubi->avail_pebs) {
217 ubi_err(ubi, "not enough PEBs, only %d available",
219 if (ubi->corr_peb_count)
220 ubi_err(ubi, "%d PEBs are corrupted and not used",
221 ubi->corr_peb_count);
225 ubi->avail_pebs -= vol->reserved_pebs;
226 ubi->rsvd_pebs += vol->reserved_pebs;
227 spin_unlock(&ubi->volumes_lock);
229 vol->vol_id = vol_id;
230 vol->alignment = req->alignment;
231 vol->data_pad = ubi->leb_size % vol->alignment;
232 vol->vol_type = req->vol_type;
233 vol->name_len = req->name_len;
234 memcpy(vol->name, req->name, vol->name_len);
238 * Finish all pending erases because there may be some LEBs belonging
239 * to the same volume ID.
241 err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
245 eba_tbl = ubi_eba_create_table(vol, vol->reserved_pebs);
246 if (IS_ERR(eba_tbl)) {
247 err = PTR_ERR(eba_tbl);
251 ubi_eba_replace_table(vol, eba_tbl);
253 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
254 vol->used_ebs = vol->reserved_pebs;
255 vol->last_eb_bytes = vol->usable_leb_size;
257 (long long)vol->used_ebs * vol->usable_leb_size;
259 vol->used_ebs = div_u64_rem(vol->used_bytes,
260 vol->usable_leb_size,
261 &vol->last_eb_bytes);
262 if (vol->last_eb_bytes != 0)
265 vol->last_eb_bytes = vol->usable_leb_size;
268 /* Make volume "available" before it becomes accessible via sysfs */
269 spin_lock(&ubi->volumes_lock);
270 ubi->volumes[vol_id] = vol;
272 spin_unlock(&ubi->volumes_lock);
274 /* Register character device for the volume */
275 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
276 vol->cdev.owner = THIS_MODULE;
278 vol->dev.devt = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
279 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
280 err = cdev_device_add(&vol->cdev, &vol->dev);
282 ubi_err(ubi, "cannot add device");
286 /* Fill volume table record */
287 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
288 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
289 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
290 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
291 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
292 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
293 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
295 vtbl_rec.vol_type = UBI_VID_STATIC;
296 memcpy(vtbl_rec.name, vol->name, vol->name_len);
298 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
302 ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED);
303 self_check_volumes(ubi);
308 * We have registered our device, we should not free the volume
309 * description object in this function in case of an error - it is
310 * freed by the release function.
312 cdev_device_del(&vol->cdev, &vol->dev);
314 spin_lock(&ubi->volumes_lock);
315 ubi->volumes[vol_id] = NULL;
317 spin_unlock(&ubi->volumes_lock);
319 spin_lock(&ubi->volumes_lock);
320 ubi->rsvd_pebs -= vol->reserved_pebs;
321 ubi->avail_pebs += vol->reserved_pebs;
323 spin_unlock(&ubi->volumes_lock);
324 put_device(&vol->dev);
325 ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err);
330 * ubi_remove_volume - remove volume.
331 * @desc: volume descriptor
332 * @no_vtbl: do not change volume table if not zero
334 * This function removes volume described by @desc. The volume has to be opened
335 * in "exclusive" mode. Returns zero in case of success and a negative error
336 * code in case of failure. The caller has to have the @ubi->device_mutex
339 int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
341 struct ubi_volume *vol = desc->vol;
342 struct ubi_device *ubi = vol->ubi;
343 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
345 dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);
346 ubi_assert(desc->mode == UBI_EXCLUSIVE);
347 ubi_assert(vol == ubi->volumes[vol_id]);
352 spin_lock(&ubi->volumes_lock);
353 if (vol->ref_count > 1) {
355 * The volume is busy, probably someone is reading one of its
361 ubi->volumes[vol_id] = NULL;
362 spin_unlock(&ubi->volumes_lock);
365 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
370 for (i = 0; i < vol->reserved_pebs; i++) {
371 err = ubi_eba_unmap_leb(ubi, vol, i);
376 cdev_device_del(&vol->cdev, &vol->dev);
377 put_device(&vol->dev);
379 spin_lock(&ubi->volumes_lock);
380 ubi->rsvd_pebs -= reserved_pebs;
381 ubi->avail_pebs += reserved_pebs;
382 ubi_update_reserved(ubi);
384 spin_unlock(&ubi->volumes_lock);
386 ubi_volume_notify(ubi, vol, UBI_VOLUME_REMOVED);
388 self_check_volumes(ubi);
393 ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err);
394 spin_lock(&ubi->volumes_lock);
395 ubi->volumes[vol_id] = vol;
397 spin_unlock(&ubi->volumes_lock);
402 * ubi_resize_volume - re-size volume.
403 * @desc: volume descriptor
404 * @reserved_pebs: new size in physical eraseblocks
406 * This function re-sizes the volume and returns zero in case of success, and a
407 * negative error code in case of failure. The caller has to have the
408 * @ubi->device_mutex locked.
410 int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
413 struct ubi_volume *vol = desc->vol;
414 struct ubi_device *ubi = vol->ubi;
415 struct ubi_vtbl_record vtbl_rec;
416 struct ubi_eba_table *new_eba_tbl = NULL;
417 int vol_id = vol->vol_id;
422 dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",
423 ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs);
425 if (vol->vol_type == UBI_STATIC_VOLUME &&
426 reserved_pebs < vol->used_ebs) {
427 ubi_err(ubi, "too small size %d, %d LEBs contain data",
428 reserved_pebs, vol->used_ebs);
432 /* If the size is the same, we have nothing to do */
433 if (reserved_pebs == vol->reserved_pebs)
436 new_eba_tbl = ubi_eba_create_table(vol, reserved_pebs);
437 if (IS_ERR(new_eba_tbl))
438 return PTR_ERR(new_eba_tbl);
440 spin_lock(&ubi->volumes_lock);
441 if (vol->ref_count > 1) {
442 spin_unlock(&ubi->volumes_lock);
446 spin_unlock(&ubi->volumes_lock);
448 /* Reserve physical eraseblocks */
449 pebs = reserved_pebs - vol->reserved_pebs;
451 spin_lock(&ubi->volumes_lock);
452 if (pebs > ubi->avail_pebs) {
453 ubi_err(ubi, "not enough PEBs: requested %d, available %d",
454 pebs, ubi->avail_pebs);
455 if (ubi->corr_peb_count)
456 ubi_err(ubi, "%d PEBs are corrupted and not used",
457 ubi->corr_peb_count);
458 spin_unlock(&ubi->volumes_lock);
462 ubi->avail_pebs -= pebs;
463 ubi->rsvd_pebs += pebs;
464 ubi_eba_copy_table(vol, new_eba_tbl, vol->reserved_pebs);
465 ubi_eba_replace_table(vol, new_eba_tbl);
466 spin_unlock(&ubi->volumes_lock);
470 for (i = 0; i < -pebs; i++) {
471 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
475 spin_lock(&ubi->volumes_lock);
476 ubi->rsvd_pebs += pebs;
477 ubi->avail_pebs -= pebs;
478 ubi_update_reserved(ubi);
479 ubi_eba_copy_table(vol, new_eba_tbl, reserved_pebs);
480 ubi_eba_replace_table(vol, new_eba_tbl);
481 spin_unlock(&ubi->volumes_lock);
485 * When we shrink a volume we have to flush all pending (erase) work.
486 * Otherwise it can happen that upon next attach UBI finds a LEB with
487 * lnum > highest_lnum and refuses to attach.
490 err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
495 /* Change volume table record */
496 vtbl_rec = ubi->vtbl[vol_id];
497 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
498 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
502 vol->reserved_pebs = reserved_pebs;
503 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
504 vol->used_ebs = reserved_pebs;
505 vol->last_eb_bytes = vol->usable_leb_size;
507 (long long)vol->used_ebs * vol->usable_leb_size;
510 ubi_volume_notify(ubi, vol, UBI_VOLUME_RESIZED);
511 self_check_volumes(ubi);
516 spin_lock(&ubi->volumes_lock);
517 ubi->rsvd_pebs -= pebs;
518 ubi->avail_pebs += pebs;
519 spin_unlock(&ubi->volumes_lock);
524 ubi_eba_destroy_table(new_eba_tbl);
529 * ubi_rename_volumes - re-name UBI volumes.
530 * @ubi: UBI device description object
531 * @rename_list: list of &struct ubi_rename_entry objects
533 * This function re-names or removes volumes specified in the re-name list.
534 * Returns zero in case of success and a negative error code in case of
537 int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
540 struct ubi_rename_entry *re;
542 err = ubi_vtbl_rename_volumes(ubi, rename_list);
546 list_for_each_entry(re, rename_list, list) {
548 err = ubi_remove_volume(re->desc, 1);
552 struct ubi_volume *vol = re->desc->vol;
554 spin_lock(&ubi->volumes_lock);
555 vol->name_len = re->new_name_len;
556 memcpy(vol->name, re->new_name, re->new_name_len + 1);
557 spin_unlock(&ubi->volumes_lock);
558 ubi_volume_notify(ubi, vol, UBI_VOLUME_RENAMED);
563 self_check_volumes(ubi);
568 * ubi_add_volume - add volume.
569 * @ubi: UBI device description object
570 * @vol: volume description object
572 * This function adds an existing volume and initializes all its data
573 * structures. Returns zero in case of success and a negative error code in
576 int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
578 int err, vol_id = vol->vol_id;
581 dbg_gen("add volume %d", vol_id);
583 /* Register character device for the volume */
584 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
585 vol->cdev.owner = THIS_MODULE;
586 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
587 err = cdev_add(&vol->cdev, dev, 1);
589 ubi_err(ubi, "cannot add character device for volume %d, error %d",
591 vol_release(&vol->dev);
595 vol->dev.release = vol_release;
596 vol->dev.parent = &ubi->dev;
598 vol->dev.class = &ubi_class;
599 vol->dev.groups = volume_dev_groups;
600 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
601 err = device_register(&vol->dev);
603 cdev_del(&vol->cdev);
604 put_device(&vol->dev);
608 self_check_volumes(ubi);
613 * ubi_free_volume - free volume.
614 * @ubi: UBI device description object
615 * @vol: volume description object
617 * This function frees all resources for volume @vol but does not remove it.
618 * Used only when the UBI device is detached.
620 void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
622 dbg_gen("free volume %d", vol->vol_id);
624 ubi->volumes[vol->vol_id] = NULL;
625 cdev_del(&vol->cdev);
626 device_unregister(&vol->dev);
630 * self_check_volume - check volume information.
631 * @ubi: UBI device description object
634 * Returns zero if volume is all right and a a negative error code if not.
636 static int self_check_volume(struct ubi_device *ubi, int vol_id)
638 int idx = vol_id2idx(ubi, vol_id);
639 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
640 const struct ubi_volume *vol;
644 spin_lock(&ubi->volumes_lock);
645 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
646 vol = ubi->volumes[idx];
650 ubi_err(ubi, "no volume info, but volume exists");
653 spin_unlock(&ubi->volumes_lock);
657 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
659 ubi_err(ubi, "negative values");
662 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
663 ubi_err(ubi, "bad alignment");
667 n = vol->alignment & (ubi->min_io_size - 1);
668 if (vol->alignment != 1 && n) {
669 ubi_err(ubi, "alignment is not multiple of min I/O unit");
673 n = ubi->leb_size % vol->alignment;
674 if (vol->data_pad != n) {
675 ubi_err(ubi, "bad data_pad, has to be %lld", n);
679 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
680 vol->vol_type != UBI_STATIC_VOLUME) {
681 ubi_err(ubi, "bad vol_type");
685 if (vol->upd_marker && vol->corrupted) {
686 ubi_err(ubi, "update marker and corrupted simultaneously");
690 if (vol->reserved_pebs > ubi->good_peb_count) {
691 ubi_err(ubi, "too large reserved_pebs");
695 n = ubi->leb_size - vol->data_pad;
696 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
697 ubi_err(ubi, "bad usable_leb_size, has to be %lld", n);
701 if (vol->name_len > UBI_VOL_NAME_MAX) {
702 ubi_err(ubi, "too long volume name, max is %d",
707 n = strnlen(vol->name, vol->name_len + 1);
708 if (n != vol->name_len) {
709 ubi_err(ubi, "bad name_len %lld", n);
713 n = (long long)vol->used_ebs * vol->usable_leb_size;
714 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
715 if (vol->corrupted) {
716 ubi_err(ubi, "corrupted dynamic volume");
719 if (vol->used_ebs != vol->reserved_pebs) {
720 ubi_err(ubi, "bad used_ebs");
723 if (vol->last_eb_bytes != vol->usable_leb_size) {
724 ubi_err(ubi, "bad last_eb_bytes");
727 if (vol->used_bytes != n) {
728 ubi_err(ubi, "bad used_bytes");
732 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
733 ubi_err(ubi, "bad used_ebs");
736 if (vol->last_eb_bytes < 0 ||
737 vol->last_eb_bytes > vol->usable_leb_size) {
738 ubi_err(ubi, "bad last_eb_bytes");
741 if (vol->used_bytes < 0 || vol->used_bytes > n ||
742 vol->used_bytes < n - vol->usable_leb_size) {
743 ubi_err(ubi, "bad used_bytes");
748 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
749 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
750 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
751 upd_marker = ubi->vtbl[vol_id].upd_marker;
752 name = &ubi->vtbl[vol_id].name[0];
753 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
754 vol_type = UBI_DYNAMIC_VOLUME;
756 vol_type = UBI_STATIC_VOLUME;
758 if (alignment != vol->alignment || data_pad != vol->data_pad ||
759 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
760 name_len != vol->name_len || strncmp(name, vol->name, name_len)) {
761 ubi_err(ubi, "volume info is different");
765 spin_unlock(&ubi->volumes_lock);
769 ubi_err(ubi, "self-check failed for volume %d", vol_id);
771 ubi_dump_vol_info(vol);
772 ubi_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
774 spin_unlock(&ubi->volumes_lock);
779 * self_check_volumes - check information about all volumes.
780 * @ubi: UBI device description object
782 * Returns zero if volumes are all right and a a negative error code if not.
784 static int self_check_volumes(struct ubi_device *ubi)
788 if (!ubi_dbg_chk_gen(ubi))
791 for (i = 0; i < ubi->vtbl_slots; i++) {
792 err = self_check_volume(ubi, i);