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;
74 ubi = ubi_get_device(vol->ubi->ubi_num);
78 spin_lock(&ubi->volumes_lock);
79 if (!ubi->volumes[vol->vol_id]) {
80 spin_unlock(&ubi->volumes_lock);
84 /* Take a reference to prevent volume removal */
86 spin_unlock(&ubi->volumes_lock);
88 if (attr == &attr_vol_reserved_ebs)
89 ret = sprintf(buf, "%d\n", vol->reserved_pebs);
90 else if (attr == &attr_vol_type) {
93 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
97 ret = sprintf(buf, "%s\n", tp);
98 } else if (attr == &attr_vol_name)
99 ret = sprintf(buf, "%s\n", vol->name);
100 else if (attr == &attr_vol_corrupted)
101 ret = sprintf(buf, "%d\n", vol->corrupted);
102 else if (attr == &attr_vol_alignment)
103 ret = sprintf(buf, "%d\n", vol->alignment);
104 else if (attr == &attr_vol_usable_eb_size)
105 ret = sprintf(buf, "%d\n", vol->usable_leb_size);
106 else if (attr == &attr_vol_data_bytes)
107 ret = sprintf(buf, "%lld\n", vol->used_bytes);
108 else if (attr == &attr_vol_upd_marker)
109 ret = sprintf(buf, "%d\n", vol->upd_marker);
111 /* This must be a bug */
114 /* We've done the operation, drop volume and UBI device references */
115 spin_lock(&ubi->volumes_lock);
117 ubi_assert(vol->ref_count >= 0);
118 spin_unlock(&ubi->volumes_lock);
123 static struct attribute *volume_dev_attrs[] = {
124 &attr_vol_reserved_ebs.attr,
127 &attr_vol_corrupted.attr,
128 &attr_vol_alignment.attr,
129 &attr_vol_usable_eb_size.attr,
130 &attr_vol_data_bytes.attr,
131 &attr_vol_upd_marker.attr,
134 ATTRIBUTE_GROUPS(volume_dev);
136 /* Release method for volume devices */
137 static void vol_release(struct device *dev)
139 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
141 ubi_eba_replace_table(vol, NULL);
142 ubi_fastmap_destroy_checkmap(vol);
147 * ubi_create_volume - create volume.
148 * @ubi: UBI device description object
149 * @req: volume creation request
151 * This function creates volume described by @req. If @req->vol_id id
152 * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
153 * and saves it in @req->vol_id. Returns zero in case of success and a negative
154 * error code in case of failure. Note, the caller has to have the
155 * @ubi->device_mutex locked.
157 int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
159 int i, err, vol_id = req->vol_id;
160 struct ubi_volume *vol;
161 struct ubi_vtbl_record vtbl_rec;
162 struct ubi_eba_table *eba_tbl = NULL;
167 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
171 device_initialize(&vol->dev);
172 vol->dev.release = vol_release;
173 vol->dev.parent = &ubi->dev;
174 vol->dev.class = &ubi_class;
175 vol->dev.groups = volume_dev_groups;
177 spin_lock(&ubi->volumes_lock);
178 if (vol_id == UBI_VOL_NUM_AUTO) {
179 /* Find unused volume ID */
180 dbg_gen("search for vacant volume ID");
181 for (i = 0; i < ubi->vtbl_slots; i++)
182 if (!ubi->volumes[i]) {
187 if (vol_id == UBI_VOL_NUM_AUTO) {
188 ubi_err(ubi, "out of volume IDs");
192 req->vol_id = vol_id;
195 dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",
196 ubi->ubi_num, vol_id, (unsigned long long)req->bytes,
197 (int)req->vol_type, req->name);
199 /* Ensure that this volume does not exist */
201 if (ubi->volumes[vol_id]) {
202 ubi_err(ubi, "volume %d already exists", vol_id);
206 /* Ensure that the name is unique */
207 for (i = 0; i < ubi->vtbl_slots; i++)
208 if (ubi->volumes[i] &&
209 ubi->volumes[i]->name_len == req->name_len &&
210 !strcmp(ubi->volumes[i]->name, req->name)) {
211 ubi_err(ubi, "volume \"%s\" exists (ID %d)",
216 /* Calculate how many eraseblocks are requested */
217 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
218 vol->reserved_pebs = div_u64(req->bytes + vol->usable_leb_size - 1,
219 vol->usable_leb_size);
221 /* Reserve physical eraseblocks */
222 if (vol->reserved_pebs > ubi->avail_pebs) {
223 ubi_err(ubi, "not enough PEBs, only %d available",
225 if (ubi->corr_peb_count)
226 ubi_err(ubi, "%d PEBs are corrupted and not used",
227 ubi->corr_peb_count);
231 ubi->avail_pebs -= vol->reserved_pebs;
232 ubi->rsvd_pebs += vol->reserved_pebs;
233 spin_unlock(&ubi->volumes_lock);
235 vol->vol_id = vol_id;
236 vol->alignment = req->alignment;
237 vol->data_pad = ubi->leb_size % vol->alignment;
238 vol->vol_type = req->vol_type;
239 vol->name_len = req->name_len;
240 memcpy(vol->name, req->name, vol->name_len);
244 * Finish all pending erases because there may be some LEBs belonging
245 * to the same volume ID.
247 err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
251 eba_tbl = ubi_eba_create_table(vol, vol->reserved_pebs);
252 if (IS_ERR(eba_tbl)) {
253 err = PTR_ERR(eba_tbl);
257 ubi_eba_replace_table(vol, eba_tbl);
259 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
260 vol->used_ebs = vol->reserved_pebs;
261 vol->last_eb_bytes = vol->usable_leb_size;
263 (long long)vol->used_ebs * vol->usable_leb_size;
265 vol->used_ebs = div_u64_rem(vol->used_bytes,
266 vol->usable_leb_size,
267 &vol->last_eb_bytes);
268 if (vol->last_eb_bytes != 0)
271 vol->last_eb_bytes = vol->usable_leb_size;
274 /* Make volume "available" before it becomes accessible via sysfs */
275 spin_lock(&ubi->volumes_lock);
276 ubi->volumes[vol_id] = vol;
278 spin_unlock(&ubi->volumes_lock);
280 /* Register character device for the volume */
281 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
282 vol->cdev.owner = THIS_MODULE;
284 vol->dev.devt = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
285 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
286 err = cdev_device_add(&vol->cdev, &vol->dev);
288 ubi_err(ubi, "cannot add device");
292 /* Fill volume table record */
293 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
294 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
295 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
296 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
297 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
298 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
299 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
301 vtbl_rec.vol_type = UBI_VID_STATIC;
302 memcpy(vtbl_rec.name, vol->name, vol->name_len);
304 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
308 ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED);
309 self_check_volumes(ubi);
314 * We have registered our device, we should not free the volume
315 * description object in this function in case of an error - it is
316 * freed by the release function.
318 cdev_device_del(&vol->cdev, &vol->dev);
320 spin_lock(&ubi->volumes_lock);
321 ubi->volumes[vol_id] = NULL;
323 spin_unlock(&ubi->volumes_lock);
324 ubi_eba_destroy_table(eba_tbl);
326 spin_lock(&ubi->volumes_lock);
327 ubi->rsvd_pebs -= vol->reserved_pebs;
328 ubi->avail_pebs += vol->reserved_pebs;
330 spin_unlock(&ubi->volumes_lock);
331 put_device(&vol->dev);
332 ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err);
337 * ubi_remove_volume - remove volume.
338 * @desc: volume descriptor
339 * @no_vtbl: do not change volume table if not zero
341 * This function removes volume described by @desc. The volume has to be opened
342 * in "exclusive" mode. Returns zero in case of success and a negative error
343 * code in case of failure. The caller has to have the @ubi->device_mutex
346 int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
348 struct ubi_volume *vol = desc->vol;
349 struct ubi_device *ubi = vol->ubi;
350 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
352 dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);
353 ubi_assert(desc->mode == UBI_EXCLUSIVE);
354 ubi_assert(vol == ubi->volumes[vol_id]);
359 spin_lock(&ubi->volumes_lock);
360 if (vol->ref_count > 1) {
362 * The volume is busy, probably someone is reading one of its
368 ubi->volumes[vol_id] = NULL;
369 spin_unlock(&ubi->volumes_lock);
372 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
377 for (i = 0; i < vol->reserved_pebs; i++) {
378 err = ubi_eba_unmap_leb(ubi, vol, i);
383 cdev_device_del(&vol->cdev, &vol->dev);
384 put_device(&vol->dev);
386 spin_lock(&ubi->volumes_lock);
387 ubi->rsvd_pebs -= reserved_pebs;
388 ubi->avail_pebs += reserved_pebs;
389 ubi_update_reserved(ubi);
391 spin_unlock(&ubi->volumes_lock);
393 ubi_volume_notify(ubi, vol, UBI_VOLUME_REMOVED);
395 self_check_volumes(ubi);
400 ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err);
401 spin_lock(&ubi->volumes_lock);
402 ubi->volumes[vol_id] = vol;
404 spin_unlock(&ubi->volumes_lock);
409 * ubi_resize_volume - re-size volume.
410 * @desc: volume descriptor
411 * @reserved_pebs: new size in physical eraseblocks
413 * This function re-sizes the volume and returns zero in case of success, and a
414 * negative error code in case of failure. The caller has to have the
415 * @ubi->device_mutex locked.
417 int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
420 struct ubi_volume *vol = desc->vol;
421 struct ubi_device *ubi = vol->ubi;
422 struct ubi_vtbl_record vtbl_rec;
423 struct ubi_eba_table *new_eba_tbl = NULL;
424 int vol_id = vol->vol_id;
429 dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",
430 ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs);
432 if (vol->vol_type == UBI_STATIC_VOLUME &&
433 reserved_pebs < vol->used_ebs) {
434 ubi_err(ubi, "too small size %d, %d LEBs contain data",
435 reserved_pebs, vol->used_ebs);
439 /* If the size is the same, we have nothing to do */
440 if (reserved_pebs == vol->reserved_pebs)
443 new_eba_tbl = ubi_eba_create_table(vol, reserved_pebs);
444 if (IS_ERR(new_eba_tbl))
445 return PTR_ERR(new_eba_tbl);
447 spin_lock(&ubi->volumes_lock);
448 if (vol->ref_count > 1) {
449 spin_unlock(&ubi->volumes_lock);
453 spin_unlock(&ubi->volumes_lock);
455 /* Reserve physical eraseblocks */
456 pebs = reserved_pebs - vol->reserved_pebs;
458 spin_lock(&ubi->volumes_lock);
459 if (pebs > ubi->avail_pebs) {
460 ubi_err(ubi, "not enough PEBs: requested %d, available %d",
461 pebs, ubi->avail_pebs);
462 if (ubi->corr_peb_count)
463 ubi_err(ubi, "%d PEBs are corrupted and not used",
464 ubi->corr_peb_count);
465 spin_unlock(&ubi->volumes_lock);
469 ubi->avail_pebs -= pebs;
470 ubi->rsvd_pebs += pebs;
471 ubi_eba_copy_table(vol, new_eba_tbl, vol->reserved_pebs);
472 ubi_eba_replace_table(vol, new_eba_tbl);
473 spin_unlock(&ubi->volumes_lock);
477 for (i = 0; i < -pebs; i++) {
478 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
482 spin_lock(&ubi->volumes_lock);
483 ubi->rsvd_pebs += pebs;
484 ubi->avail_pebs -= pebs;
485 ubi_update_reserved(ubi);
486 ubi_eba_copy_table(vol, new_eba_tbl, reserved_pebs);
487 ubi_eba_replace_table(vol, new_eba_tbl);
488 spin_unlock(&ubi->volumes_lock);
492 * When we shrink a volume we have to flush all pending (erase) work.
493 * Otherwise it can happen that upon next attach UBI finds a LEB with
494 * lnum > highest_lnum and refuses to attach.
497 err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
502 /* Change volume table record */
503 vtbl_rec = ubi->vtbl[vol_id];
504 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
505 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
509 vol->reserved_pebs = reserved_pebs;
510 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
511 vol->used_ebs = reserved_pebs;
512 vol->last_eb_bytes = vol->usable_leb_size;
514 (long long)vol->used_ebs * vol->usable_leb_size;
517 ubi_volume_notify(ubi, vol, UBI_VOLUME_RESIZED);
518 self_check_volumes(ubi);
523 spin_lock(&ubi->volumes_lock);
524 ubi->rsvd_pebs -= pebs;
525 ubi->avail_pebs += pebs;
526 spin_unlock(&ubi->volumes_lock);
534 * ubi_rename_volumes - re-name UBI volumes.
535 * @ubi: UBI device description object
536 * @rename_list: list of &struct ubi_rename_entry objects
538 * This function re-names or removes volumes specified in the re-name list.
539 * Returns zero in case of success and a negative error code in case of
542 int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
545 struct ubi_rename_entry *re;
547 err = ubi_vtbl_rename_volumes(ubi, rename_list);
551 list_for_each_entry(re, rename_list, list) {
553 err = ubi_remove_volume(re->desc, 1);
557 struct ubi_volume *vol = re->desc->vol;
559 spin_lock(&ubi->volumes_lock);
560 vol->name_len = re->new_name_len;
561 memcpy(vol->name, re->new_name, re->new_name_len + 1);
562 spin_unlock(&ubi->volumes_lock);
563 ubi_volume_notify(ubi, vol, UBI_VOLUME_RENAMED);
568 self_check_volumes(ubi);
573 * ubi_add_volume - add volume.
574 * @ubi: UBI device description object
575 * @vol: volume description object
577 * This function adds an existing volume and initializes all its data
578 * structures. Returns zero in case of success and a negative error code in
581 int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
583 int err, vol_id = vol->vol_id;
586 dbg_gen("add volume %d", vol_id);
588 /* Register character device for the volume */
589 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
590 vol->cdev.owner = THIS_MODULE;
591 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
592 err = cdev_add(&vol->cdev, dev, 1);
594 ubi_err(ubi, "cannot add character device for volume %d, error %d",
599 vol->dev.release = vol_release;
600 vol->dev.parent = &ubi->dev;
602 vol->dev.class = &ubi_class;
603 vol->dev.groups = volume_dev_groups;
604 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
605 err = device_register(&vol->dev);
609 self_check_volumes(ubi);
613 cdev_del(&vol->cdev);
618 * ubi_free_volume - free volume.
619 * @ubi: UBI device description object
620 * @vol: volume description object
622 * This function frees all resources for volume @vol but does not remove it.
623 * Used only when the UBI device is detached.
625 void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
627 dbg_gen("free volume %d", vol->vol_id);
629 ubi->volumes[vol->vol_id] = NULL;
630 cdev_del(&vol->cdev);
631 device_unregister(&vol->dev);
635 * self_check_volume - check volume information.
636 * @ubi: UBI device description object
639 * Returns zero if volume is all right and a a negative error code if not.
641 static int self_check_volume(struct ubi_device *ubi, int vol_id)
643 int idx = vol_id2idx(ubi, vol_id);
644 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
645 const struct ubi_volume *vol;
649 spin_lock(&ubi->volumes_lock);
650 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
651 vol = ubi->volumes[idx];
655 ubi_err(ubi, "no volume info, but volume exists");
658 spin_unlock(&ubi->volumes_lock);
662 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
664 ubi_err(ubi, "negative values");
667 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
668 ubi_err(ubi, "bad alignment");
672 n = vol->alignment & (ubi->min_io_size - 1);
673 if (vol->alignment != 1 && n) {
674 ubi_err(ubi, "alignment is not multiple of min I/O unit");
678 n = ubi->leb_size % vol->alignment;
679 if (vol->data_pad != n) {
680 ubi_err(ubi, "bad data_pad, has to be %lld", n);
684 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
685 vol->vol_type != UBI_STATIC_VOLUME) {
686 ubi_err(ubi, "bad vol_type");
690 if (vol->upd_marker && vol->corrupted) {
691 ubi_err(ubi, "update marker and corrupted simultaneously");
695 if (vol->reserved_pebs > ubi->good_peb_count) {
696 ubi_err(ubi, "too large reserved_pebs");
700 n = ubi->leb_size - vol->data_pad;
701 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
702 ubi_err(ubi, "bad usable_leb_size, has to be %lld", n);
706 if (vol->name_len > UBI_VOL_NAME_MAX) {
707 ubi_err(ubi, "too long volume name, max is %d",
712 n = strnlen(vol->name, vol->name_len + 1);
713 if (n != vol->name_len) {
714 ubi_err(ubi, "bad name_len %lld", n);
718 n = (long long)vol->used_ebs * vol->usable_leb_size;
719 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
720 if (vol->corrupted) {
721 ubi_err(ubi, "corrupted dynamic volume");
724 if (vol->used_ebs != vol->reserved_pebs) {
725 ubi_err(ubi, "bad used_ebs");
728 if (vol->last_eb_bytes != vol->usable_leb_size) {
729 ubi_err(ubi, "bad last_eb_bytes");
732 if (vol->used_bytes != n) {
733 ubi_err(ubi, "bad used_bytes");
737 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
738 ubi_err(ubi, "bad used_ebs");
741 if (vol->last_eb_bytes < 0 ||
742 vol->last_eb_bytes > vol->usable_leb_size) {
743 ubi_err(ubi, "bad last_eb_bytes");
746 if (vol->used_bytes < 0 || vol->used_bytes > n ||
747 vol->used_bytes < n - vol->usable_leb_size) {
748 ubi_err(ubi, "bad used_bytes");
753 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
754 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
755 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
756 upd_marker = ubi->vtbl[vol_id].upd_marker;
757 name = &ubi->vtbl[vol_id].name[0];
758 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
759 vol_type = UBI_DYNAMIC_VOLUME;
761 vol_type = UBI_STATIC_VOLUME;
763 if (alignment != vol->alignment || data_pad != vol->data_pad ||
764 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
765 name_len != vol->name_len || strncmp(name, vol->name, name_len)) {
766 ubi_err(ubi, "volume info is different");
770 spin_unlock(&ubi->volumes_lock);
774 ubi_err(ubi, "self-check failed for volume %d", vol_id);
776 ubi_dump_vol_info(vol);
777 ubi_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
779 spin_unlock(&ubi->volumes_lock);
784 * self_check_volumes - check information about all volumes.
785 * @ubi: UBI device description object
787 * Returns zero if volumes are all right and a a negative error code if not.
789 static int self_check_volumes(struct ubi_device *ubi)
793 if (!ubi_dbg_chk_gen(ubi))
796 for (i = 0; i < ubi->vtbl_slots; i++) {
797 err = self_check_volume(ubi, i);