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 <asm/div64.h>
30 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
31 static void paranoid_check_volumes(struct ubi_device *ubi);
33 #define paranoid_check_volumes(ubi)
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 * What we want to do in a situation like that is to return error when the file
67 * is read. This is done by means of the 'removed' flag and the 'vol_lock' of
68 * the UBI volume description object.
70 static ssize_t vol_attribute_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
74 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
76 spin_lock(&vol->ubi->volumes_lock);
78 spin_unlock(&vol->ubi->volumes_lock);
82 if (attr == &attr_vol_reserved_ebs)
83 ret = sprintf(buf, "%d\n", vol->reserved_pebs);
84 else if (attr == &attr_vol_type) {
87 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
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);
106 spin_unlock(&vol->ubi->volumes_lock);
110 /* Release method for volume devices */
111 static void vol_release(struct device *dev)
113 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
115 ubi_assert(vol->removed);
120 * volume_sysfs_init - initialize sysfs for new volume.
121 * @ubi: UBI device description object
122 * @vol: volume description object
124 * This function returns zero in case of success and a negative error code in
127 * Note, this function does not free allocated resources in case of failure -
128 * the caller does it. This is because this would cause release() here and the
131 static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol)
135 err = device_create_file(&vol->dev, &attr_vol_reserved_ebs);
138 err = device_create_file(&vol->dev, &attr_vol_type);
141 err = device_create_file(&vol->dev, &attr_vol_name);
144 err = device_create_file(&vol->dev, &attr_vol_corrupted);
147 err = device_create_file(&vol->dev, &attr_vol_alignment);
150 err = device_create_file(&vol->dev, &attr_vol_usable_eb_size);
153 err = device_create_file(&vol->dev, &attr_vol_data_bytes);
156 err = device_create_file(&vol->dev, &attr_vol_upd_marker);
163 * volume_sysfs_close - close sysfs for a volume.
164 * @vol: volume description object
166 static void volume_sysfs_close(struct ubi_volume *vol)
168 device_remove_file(&vol->dev, &attr_vol_upd_marker);
169 device_remove_file(&vol->dev, &attr_vol_data_bytes);
170 device_remove_file(&vol->dev, &attr_vol_usable_eb_size);
171 device_remove_file(&vol->dev, &attr_vol_alignment);
172 device_remove_file(&vol->dev, &attr_vol_corrupted);
173 device_remove_file(&vol->dev, &attr_vol_name);
174 device_remove_file(&vol->dev, &attr_vol_type);
175 device_remove_file(&vol->dev, &attr_vol_reserved_ebs);
176 device_unregister(&vol->dev);
180 * ubi_create_volume - create volume.
181 * @ubi: UBI device description object
182 * @req: volume creation request
184 * This function creates volume described by @req. If @req->vol_id id
185 * %UBI_VOL_NUM_AUTO, this function automatically assigne ID to the new volume
186 * and saves it in @req->vol_id. Returns zero in case of success and a negative
187 * error code in case of failure.
189 int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
191 int i, err, vol_id = req->vol_id;
192 struct ubi_volume *vol;
193 struct ubi_vtbl_record vtbl_rec;
199 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
203 spin_lock(&ubi->volumes_lock);
205 if (vol_id == UBI_VOL_NUM_AUTO) {
206 /* Find unused volume ID */
207 dbg_msg("search for vacant volume ID");
208 for (i = 0; i < ubi->vtbl_slots; i++)
209 if (!ubi->volumes[i]) {
214 if (vol_id == UBI_VOL_NUM_AUTO) {
215 dbg_err("out of volume IDs");
219 req->vol_id = vol_id;
222 dbg_msg("volume ID %d, %llu bytes, type %d, name %s",
223 vol_id, (unsigned long long)req->bytes,
224 (int)req->vol_type, req->name);
226 /* Ensure that this volume does not exist */
228 if (ubi->volumes[vol_id]) {
229 dbg_err("volume %d already exists", vol_id);
233 /* Ensure that the name is unique */
234 for (i = 0; i < ubi->vtbl_slots; i++)
235 if (ubi->volumes[i] &&
236 ubi->volumes[i]->name_len == req->name_len &&
237 !strcmp(ubi->volumes[i]->name, req->name)) {
238 dbg_err("volume \"%s\" exists (ID %d)", req->name, i);
242 /* Calculate how many eraseblocks are requested */
243 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
245 if (do_div(bytes, vol->usable_leb_size))
246 vol->reserved_pebs = 1;
247 vol->reserved_pebs += bytes;
249 /* Reserve physical eraseblocks */
250 if (vol->reserved_pebs > ubi->avail_pebs) {
251 dbg_err("not enough PEBs, only %d available", ubi->avail_pebs);
255 ubi->avail_pebs -= vol->reserved_pebs;
256 ubi->rsvd_pebs += vol->reserved_pebs;
258 vol->vol_id = vol_id;
259 vol->alignment = req->alignment;
260 vol->data_pad = ubi->leb_size % vol->alignment;
261 vol->vol_type = req->vol_type;
262 vol->name_len = req->name_len;
263 memcpy(vol->name, req->name, vol->name_len + 1);
266 ubi->volumes[vol_id] = vol;
267 spin_unlock(&ubi->volumes_lock);
270 * Finish all pending erases because there may be some LEBs belonging
271 * to the same volume ID.
273 err = ubi_wl_flush(ubi);
277 vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
283 for (i = 0; i < vol->reserved_pebs; i++)
284 vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
286 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
287 vol->used_ebs = vol->reserved_pebs;
288 vol->last_eb_bytes = vol->usable_leb_size;
290 (long long)vol->used_ebs * vol->usable_leb_size;
292 bytes = vol->used_bytes;
293 vol->last_eb_bytes = do_div(bytes, vol->usable_leb_size);
294 vol->used_ebs = bytes;
295 if (vol->last_eb_bytes)
298 vol->last_eb_bytes = vol->usable_leb_size;
301 /* Register character device for the volume */
302 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
303 vol->cdev.owner = THIS_MODULE;
304 err = cdev_add(&vol->cdev, MKDEV(ubi->major, vol_id + 1), 1);
306 ubi_err("cannot add character device for volume %d", vol_id);
310 err = ubi_create_gluebi(ubi, vol);
314 vol->dev.release = vol_release;
315 vol->dev.parent = &ubi->dev;
316 vol->dev.devt = MKDEV(ubi->major, vol->vol_id + 1);
317 vol->dev.class = ubi_class;
318 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
319 err = device_register(&vol->dev);
323 err = volume_sysfs_init(ubi, vol);
327 /* Fill volume table record */
328 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
329 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
330 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
331 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
332 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
333 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
334 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
336 vtbl_rec.vol_type = UBI_VID_STATIC;
337 memcpy(vtbl_rec.name, vol->name, vol->name_len + 1);
339 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
343 spin_lock(&ubi->volumes_lock);
346 spin_unlock(&ubi->volumes_lock);
348 paranoid_check_volumes(ubi);
352 err = ubi_destroy_gluebi(vol);
354 cdev_del(&vol->cdev);
358 spin_lock(&ubi->volumes_lock);
359 ubi->rsvd_pebs -= vol->reserved_pebs;
360 ubi->avail_pebs += vol->reserved_pebs;
361 ubi->volumes[vol_id] = NULL;
363 spin_unlock(&ubi->volumes_lock);
368 * We are registered, so @vol is destroyed in the release function and
369 * we have to de-initialize differently.
372 err = ubi_destroy_gluebi(vol);
373 cdev_del(&vol->cdev);
375 spin_lock(&ubi->volumes_lock);
376 ubi->rsvd_pebs -= vol->reserved_pebs;
377 ubi->avail_pebs += vol->reserved_pebs;
378 ubi->volumes[vol_id] = NULL;
379 spin_unlock(&ubi->volumes_lock);
380 volume_sysfs_close(vol);
385 * ubi_remove_volume - remove volume.
386 * @desc: volume descriptor
388 * This function removes volume described by @desc. The volume has to be opened
389 * in "exclusive" mode. Returns zero in case of success and a negative error
390 * code in case of failure.
392 int ubi_remove_volume(struct ubi_volume_desc *desc)
394 struct ubi_volume *vol = desc->vol;
395 struct ubi_device *ubi = vol->ubi;
396 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
398 dbg_msg("remove UBI volume %d", vol_id);
399 ubi_assert(desc->mode == UBI_EXCLUSIVE);
400 ubi_assert(vol == ubi->volumes[vol_id]);
405 err = ubi_destroy_gluebi(vol);
409 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
413 for (i = 0; i < vol->reserved_pebs; i++) {
414 err = ubi_eba_unmap_leb(ubi, vol_id, i);
419 spin_lock(&ubi->volumes_lock);
421 ubi->volumes[vol_id] = NULL;
422 spin_unlock(&ubi->volumes_lock);
426 cdev_del(&vol->cdev);
427 volume_sysfs_close(vol);
430 spin_lock(&ubi->volumes_lock);
431 ubi->rsvd_pebs -= reserved_pebs;
432 ubi->avail_pebs += reserved_pebs;
433 i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
435 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
436 ubi->avail_pebs -= i;
438 ubi->beb_rsvd_pebs += i;
440 ubi_msg("reserve more %d PEBs", i);
443 spin_unlock(&ubi->volumes_lock);
445 paranoid_check_volumes(ubi);
446 module_put(THIS_MODULE);
451 * ubi_resize_volume - re-size volume.
452 * @desc: volume descriptor
453 * @reserved_pebs: new size in physical eraseblocks
455 * This function returns zero in case of success, and a negative error code in
458 int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
460 int i, err, pebs, *new_mapping;
461 struct ubi_volume *vol = desc->vol;
462 struct ubi_device *ubi = vol->ubi;
463 struct ubi_vtbl_record vtbl_rec;
464 int vol_id = vol->vol_id;
469 dbg_msg("re-size volume %d to from %d to %d PEBs",
470 vol_id, vol->reserved_pebs, reserved_pebs);
471 ubi_assert(desc->mode == UBI_EXCLUSIVE);
472 ubi_assert(vol == ubi->volumes[vol_id]);
474 if (vol->vol_type == UBI_STATIC_VOLUME &&
475 reserved_pebs < vol->used_ebs) {
476 dbg_err("too small size %d, %d LEBs contain data",
477 reserved_pebs, vol->used_ebs);
481 /* If the size is the same, we have nothing to do */
482 if (reserved_pebs == vol->reserved_pebs)
485 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
489 for (i = 0; i < reserved_pebs; i++)
490 new_mapping[i] = UBI_LEB_UNMAPPED;
492 /* Reserve physical eraseblocks */
493 pebs = reserved_pebs - vol->reserved_pebs;
495 spin_lock(&ubi->volumes_lock);
496 if (pebs > ubi->avail_pebs) {
497 dbg_err("not enough PEBs: requested %d, available %d",
498 pebs, ubi->avail_pebs);
499 spin_unlock(&ubi->volumes_lock);
503 ubi->avail_pebs -= pebs;
504 ubi->rsvd_pebs += pebs;
505 for (i = 0; i < vol->reserved_pebs; i++)
506 new_mapping[i] = vol->eba_tbl[i];
508 vol->eba_tbl = new_mapping;
509 spin_unlock(&ubi->volumes_lock);
512 /* Change volume table record */
513 memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
514 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
515 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
520 for (i = 0; i < -pebs; i++) {
521 err = ubi_eba_unmap_leb(ubi, vol_id, reserved_pebs + i);
525 spin_lock(&ubi->volumes_lock);
526 ubi->rsvd_pebs += pebs;
527 ubi->avail_pebs -= pebs;
528 pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
530 pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs;
531 ubi->avail_pebs -= pebs;
532 ubi->rsvd_pebs += pebs;
533 ubi->beb_rsvd_pebs += pebs;
535 ubi_msg("reserve more %d PEBs", pebs);
537 for (i = 0; i < reserved_pebs; i++)
538 new_mapping[i] = vol->eba_tbl[i];
540 vol->eba_tbl = new_mapping;
541 spin_unlock(&ubi->volumes_lock);
544 vol->reserved_pebs = reserved_pebs;
545 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
546 vol->used_ebs = reserved_pebs;
547 vol->last_eb_bytes = vol->usable_leb_size;
549 (long long)vol->used_ebs * vol->usable_leb_size;
552 paranoid_check_volumes(ubi);
557 spin_lock(&ubi->volumes_lock);
558 ubi->rsvd_pebs -= pebs;
559 ubi->avail_pebs += pebs;
560 spin_unlock(&ubi->volumes_lock);
568 * ubi_add_volume - add volume.
569 * @ubi: UBI device description object
572 * This function adds an existin volume and initializes all its data
573 * structures. Returnes zero in case of success and a negative error code in
576 int ubi_add_volume(struct ubi_device *ubi, int vol_id)
579 struct ubi_volume *vol = ubi->volumes[vol_id];
581 dbg_msg("add volume %d", vol_id);
582 ubi_dbg_dump_vol_info(vol);
585 /* Register character device for the volume */
586 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
587 vol->cdev.owner = THIS_MODULE;
588 err = cdev_add(&vol->cdev, MKDEV(ubi->major, vol->vol_id + 1), 1);
590 ubi_err("cannot add character device for volume %d", vol_id);
594 err = ubi_create_gluebi(ubi, vol);
598 vol->dev.release = vol_release;
599 vol->dev.parent = &ubi->dev;
600 vol->dev.devt = MKDEV(ubi->major, vol->vol_id + 1);
601 vol->dev.class = ubi_class;
602 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
603 err = device_register(&vol->dev);
607 err = volume_sysfs_init(ubi, vol);
609 cdev_del(&vol->cdev);
610 err = ubi_destroy_gluebi(vol);
611 volume_sysfs_close(vol);
615 paranoid_check_volumes(ubi);
619 err = ubi_destroy_gluebi(vol);
621 cdev_del(&vol->cdev);
626 * ubi_free_volume - free volume.
627 * @ubi: UBI device description object
630 * This function frees all resources for volume @vol_id but does not remove it.
631 * Used only when the UBI device is detached.
633 void ubi_free_volume(struct ubi_device *ubi, int vol_id)
636 struct ubi_volume *vol = ubi->volumes[vol_id];
638 dbg_msg("free volume %d", vol_id);
642 err = ubi_destroy_gluebi(vol);
643 ubi->volumes[vol_id] = NULL;
644 cdev_del(&vol->cdev);
645 volume_sysfs_close(vol);
648 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
651 * paranoid_check_volume - check volume information.
652 * @ubi: UBI device description object
655 static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
657 int idx = vol_id2idx(ubi, vol_id);
658 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
659 const struct ubi_volume *vol;
663 spin_lock(&ubi->volumes_lock);
664 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
665 vol = ubi->volumes[idx];
669 ubi_err("no volume info, but volume exists");
672 spin_unlock(&ubi->volumes_lock);
676 if (vol->exclusive) {
678 * The volume may be being created at the moment, do not check
679 * it (e.g., it may be in the middle of ubi_create_volume().
681 spin_unlock(&ubi->volumes_lock);
685 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
687 ubi_err("negative values");
690 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
691 ubi_err("bad alignment");
695 n = vol->alignment % ubi->min_io_size;
696 if (vol->alignment != 1 && n) {
697 ubi_err("alignment is not multiple of min I/O unit");
701 n = ubi->leb_size % vol->alignment;
702 if (vol->data_pad != n) {
703 ubi_err("bad data_pad, has to be %lld", n);
707 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
708 vol->vol_type != UBI_STATIC_VOLUME) {
709 ubi_err("bad vol_type");
713 if (vol->upd_marker != 0 && vol->upd_marker != 1) {
714 ubi_err("bad upd_marker");
718 if (vol->upd_marker && vol->corrupted) {
719 dbg_err("update marker and corrupted simultaneously");
723 if (vol->reserved_pebs > ubi->good_peb_count) {
724 ubi_err("too large reserved_pebs");
728 n = ubi->leb_size - vol->data_pad;
729 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
730 ubi_err("bad usable_leb_size, has to be %lld", n);
734 if (vol->name_len > UBI_VOL_NAME_MAX) {
735 ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
740 ubi_err("NULL volume name");
744 n = strnlen(vol->name, vol->name_len + 1);
745 if (n != vol->name_len) {
746 ubi_err("bad name_len %lld", n);
750 n = (long long)vol->used_ebs * vol->usable_leb_size;
751 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
752 if (vol->corrupted != 0) {
753 ubi_err("corrupted dynamic volume");
756 if (vol->used_ebs != vol->reserved_pebs) {
757 ubi_err("bad used_ebs");
760 if (vol->last_eb_bytes != vol->usable_leb_size) {
761 ubi_err("bad last_eb_bytes");
764 if (vol->used_bytes != n) {
765 ubi_err("bad used_bytes");
769 if (vol->corrupted != 0 && vol->corrupted != 1) {
770 ubi_err("bad corrupted");
773 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
774 ubi_err("bad used_ebs");
777 if (vol->last_eb_bytes < 0 ||
778 vol->last_eb_bytes > vol->usable_leb_size) {
779 ubi_err("bad last_eb_bytes");
782 if (vol->used_bytes < 0 || vol->used_bytes > n ||
783 vol->used_bytes < n - vol->usable_leb_size) {
784 ubi_err("bad used_bytes");
789 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
790 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
791 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
792 upd_marker = ubi->vtbl[vol_id].upd_marker;
793 name = &ubi->vtbl[vol_id].name[0];
794 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
795 vol_type = UBI_DYNAMIC_VOLUME;
797 vol_type = UBI_STATIC_VOLUME;
799 if (alignment != vol->alignment || data_pad != vol->data_pad ||
800 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
801 name_len!= vol->name_len || strncmp(name, vol->name, name_len)) {
802 ubi_err("volume info is different");
806 spin_unlock(&ubi->volumes_lock);
810 ubi_err("paranoid check failed for volume %d", vol_id);
811 ubi_dbg_dump_vol_info(vol);
812 ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
813 spin_unlock(&ubi->volumes_lock);
818 * paranoid_check_volumes - check information about all volumes.
819 * @ubi: UBI device description object
821 static void paranoid_check_volumes(struct ubi_device *ubi)
825 mutex_lock(&ubi->vtbl_mutex);
826 for (i = 0; i < ubi->vtbl_slots; i++)
827 paranoid_check_volume(ubi, i);
828 mutex_unlock(&ubi->vtbl_mutex);