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 /* Release method for volume devices */
124 static void vol_release(struct device *dev)
126 struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
133 * volume_sysfs_init - initialize sysfs for new volume.
134 * @ubi: UBI device description object
135 * @vol: volume description object
137 * This function returns zero in case of success and a negative error code in
140 * Note, this function does not free allocated resources in case of failure -
141 * the caller does it. This is because this would cause release() here and the
144 static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol)
148 err = device_create_file(&vol->dev, &attr_vol_reserved_ebs);
151 err = device_create_file(&vol->dev, &attr_vol_type);
154 err = device_create_file(&vol->dev, &attr_vol_name);
157 err = device_create_file(&vol->dev, &attr_vol_corrupted);
160 err = device_create_file(&vol->dev, &attr_vol_alignment);
163 err = device_create_file(&vol->dev, &attr_vol_usable_eb_size);
166 err = device_create_file(&vol->dev, &attr_vol_data_bytes);
169 err = device_create_file(&vol->dev, &attr_vol_upd_marker);
174 * volume_sysfs_close - close sysfs for a volume.
175 * @vol: volume description object
177 static void volume_sysfs_close(struct ubi_volume *vol)
179 device_remove_file(&vol->dev, &attr_vol_upd_marker);
180 device_remove_file(&vol->dev, &attr_vol_data_bytes);
181 device_remove_file(&vol->dev, &attr_vol_usable_eb_size);
182 device_remove_file(&vol->dev, &attr_vol_alignment);
183 device_remove_file(&vol->dev, &attr_vol_corrupted);
184 device_remove_file(&vol->dev, &attr_vol_name);
185 device_remove_file(&vol->dev, &attr_vol_type);
186 device_remove_file(&vol->dev, &attr_vol_reserved_ebs);
187 device_unregister(&vol->dev);
191 * ubi_create_volume - create volume.
192 * @ubi: UBI device description object
193 * @req: volume creation request
195 * This function creates volume described by @req. If @req->vol_id id
196 * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
197 * and saves it in @req->vol_id. Returns zero in case of success and a negative
198 * error code in case of failure. Note, the caller has to have the
199 * @ubi->device_mutex locked.
201 int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
203 int i, err, vol_id = req->vol_id, do_free = 1;
204 struct ubi_volume *vol;
205 struct ubi_vtbl_record vtbl_rec;
211 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
215 spin_lock(&ubi->volumes_lock);
216 if (vol_id == UBI_VOL_NUM_AUTO) {
217 /* Find unused volume ID */
218 dbg_gen("search for vacant volume ID");
219 for (i = 0; i < ubi->vtbl_slots; i++)
220 if (!ubi->volumes[i]) {
225 if (vol_id == UBI_VOL_NUM_AUTO) {
226 ubi_err(ubi, "out of volume IDs");
230 req->vol_id = vol_id;
233 dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",
234 ubi->ubi_num, vol_id, (unsigned long long)req->bytes,
235 (int)req->vol_type, req->name);
237 /* Ensure that this volume does not exist */
239 if (ubi->volumes[vol_id]) {
240 ubi_err(ubi, "volume %d already exists", vol_id);
244 /* Ensure that the name is unique */
245 for (i = 0; i < ubi->vtbl_slots; i++)
246 if (ubi->volumes[i] &&
247 ubi->volumes[i]->name_len == req->name_len &&
248 !strcmp(ubi->volumes[i]->name, req->name)) {
249 ubi_err(ubi, "volume \"%s\" exists (ID %d)",
254 /* Calculate how many eraseblocks are requested */
255 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
256 vol->reserved_pebs += div_u64(req->bytes + vol->usable_leb_size - 1,
257 vol->usable_leb_size);
259 /* Reserve physical eraseblocks */
260 if (vol->reserved_pebs > ubi->avail_pebs) {
261 ubi_err(ubi, "not enough PEBs, only %d available",
263 if (ubi->corr_peb_count)
264 ubi_err(ubi, "%d PEBs are corrupted and not used",
265 ubi->corr_peb_count);
269 ubi->avail_pebs -= vol->reserved_pebs;
270 ubi->rsvd_pebs += vol->reserved_pebs;
271 spin_unlock(&ubi->volumes_lock);
273 vol->vol_id = vol_id;
274 vol->alignment = req->alignment;
275 vol->data_pad = ubi->leb_size % vol->alignment;
276 vol->vol_type = req->vol_type;
277 vol->name_len = req->name_len;
278 memcpy(vol->name, req->name, vol->name_len);
282 * Finish all pending erases because there may be some LEBs belonging
283 * to the same volume ID.
285 err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
289 vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
295 for (i = 0; i < vol->reserved_pebs; i++)
296 vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
298 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
299 vol->used_ebs = vol->reserved_pebs;
300 vol->last_eb_bytes = vol->usable_leb_size;
302 (long long)vol->used_ebs * vol->usable_leb_size;
304 vol->used_ebs = div_u64_rem(vol->used_bytes,
305 vol->usable_leb_size,
306 &vol->last_eb_bytes);
307 if (vol->last_eb_bytes != 0)
310 vol->last_eb_bytes = vol->usable_leb_size;
313 /* Register character device for the volume */
314 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
315 vol->cdev.owner = THIS_MODULE;
316 dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
317 err = cdev_add(&vol->cdev, dev, 1);
319 ubi_err(ubi, "cannot add character device");
323 vol->dev.release = vol_release;
324 vol->dev.parent = &ubi->dev;
326 vol->dev.class = ubi_class;
328 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
329 err = device_register(&vol->dev);
331 ubi_err(ubi, "cannot register device");
335 err = volume_sysfs_init(ubi, vol);
339 /* Fill volume table record */
340 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
341 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
342 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
343 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
344 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
345 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
346 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
348 vtbl_rec.vol_type = UBI_VID_STATIC;
349 memcpy(vtbl_rec.name, vol->name, vol->name_len);
351 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
355 spin_lock(&ubi->volumes_lock);
356 ubi->volumes[vol_id] = vol;
358 spin_unlock(&ubi->volumes_lock);
360 ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED);
361 self_check_volumes(ubi);
366 * We have registered our device, we should not free the volume
367 * description object in this function in case of an error - it is
368 * freed by the release function.
370 * Get device reference to prevent the release function from being
371 * called just after sysfs has been closed.
374 get_device(&vol->dev);
375 volume_sysfs_close(vol);
377 cdev_del(&vol->cdev);
382 spin_lock(&ubi->volumes_lock);
383 ubi->rsvd_pebs -= vol->reserved_pebs;
384 ubi->avail_pebs += vol->reserved_pebs;
386 spin_unlock(&ubi->volumes_lock);
390 put_device(&vol->dev);
391 ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err);
396 * ubi_remove_volume - remove volume.
397 * @desc: volume descriptor
398 * @no_vtbl: do not change volume table if not zero
400 * This function removes volume described by @desc. The volume has to be opened
401 * in "exclusive" mode. Returns zero in case of success and a negative error
402 * code in case of failure. The caller has to have the @ubi->device_mutex
405 int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
407 struct ubi_volume *vol = desc->vol;
408 struct ubi_device *ubi = vol->ubi;
409 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
411 dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);
412 ubi_assert(desc->mode == UBI_EXCLUSIVE);
413 ubi_assert(vol == ubi->volumes[vol_id]);
418 spin_lock(&ubi->volumes_lock);
419 if (vol->ref_count > 1) {
421 * The volume is busy, probably someone is reading one of its
427 ubi->volumes[vol_id] = NULL;
428 spin_unlock(&ubi->volumes_lock);
431 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
436 for (i = 0; i < vol->reserved_pebs; i++) {
437 err = ubi_eba_unmap_leb(ubi, vol, i);
442 cdev_del(&vol->cdev);
443 volume_sysfs_close(vol);
445 spin_lock(&ubi->volumes_lock);
446 ubi->rsvd_pebs -= reserved_pebs;
447 ubi->avail_pebs += reserved_pebs;
448 ubi_update_reserved(ubi);
450 spin_unlock(&ubi->volumes_lock);
452 ubi_volume_notify(ubi, vol, UBI_VOLUME_REMOVED);
454 self_check_volumes(ubi);
459 ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err);
460 spin_lock(&ubi->volumes_lock);
461 ubi->volumes[vol_id] = vol;
463 spin_unlock(&ubi->volumes_lock);
468 * ubi_resize_volume - re-size volume.
469 * @desc: volume descriptor
470 * @reserved_pebs: new size in physical eraseblocks
472 * This function re-sizes the volume and returns zero in case of success, and a
473 * negative error code in case of failure. The caller has to have the
474 * @ubi->device_mutex locked.
476 int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
478 int i, err, pebs, *new_mapping;
479 struct ubi_volume *vol = desc->vol;
480 struct ubi_device *ubi = vol->ubi;
481 struct ubi_vtbl_record vtbl_rec;
482 int vol_id = vol->vol_id;
487 dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",
488 ubi->ubi_num, vol_id, vol->reserved_pebs, reserved_pebs);
490 if (vol->vol_type == UBI_STATIC_VOLUME &&
491 reserved_pebs < vol->used_ebs) {
492 ubi_err(ubi, "too small size %d, %d LEBs contain data",
493 reserved_pebs, vol->used_ebs);
497 /* If the size is the same, we have nothing to do */
498 if (reserved_pebs == vol->reserved_pebs)
501 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
505 for (i = 0; i < reserved_pebs; i++)
506 new_mapping[i] = UBI_LEB_UNMAPPED;
508 spin_lock(&ubi->volumes_lock);
509 if (vol->ref_count > 1) {
510 spin_unlock(&ubi->volumes_lock);
514 spin_unlock(&ubi->volumes_lock);
516 /* Reserve physical eraseblocks */
517 pebs = reserved_pebs - vol->reserved_pebs;
519 spin_lock(&ubi->volumes_lock);
520 if (pebs > ubi->avail_pebs) {
521 ubi_err(ubi, "not enough PEBs: requested %d, available %d",
522 pebs, ubi->avail_pebs);
523 if (ubi->corr_peb_count)
524 ubi_err(ubi, "%d PEBs are corrupted and not used",
525 ubi->corr_peb_count);
526 spin_unlock(&ubi->volumes_lock);
530 ubi->avail_pebs -= pebs;
531 ubi->rsvd_pebs += pebs;
532 for (i = 0; i < vol->reserved_pebs; i++)
533 new_mapping[i] = vol->eba_tbl[i];
535 vol->eba_tbl = new_mapping;
536 spin_unlock(&ubi->volumes_lock);
539 /* Change volume table record */
540 vtbl_rec = ubi->vtbl[vol_id];
541 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
542 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
547 for (i = 0; i < -pebs; i++) {
548 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
552 spin_lock(&ubi->volumes_lock);
553 ubi->rsvd_pebs += pebs;
554 ubi->avail_pebs -= pebs;
555 ubi_update_reserved(ubi);
556 for (i = 0; i < reserved_pebs; i++)
557 new_mapping[i] = vol->eba_tbl[i];
559 vol->eba_tbl = new_mapping;
560 spin_unlock(&ubi->volumes_lock);
563 vol->reserved_pebs = reserved_pebs;
564 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
565 vol->used_ebs = reserved_pebs;
566 vol->last_eb_bytes = vol->usable_leb_size;
568 (long long)vol->used_ebs * vol->usable_leb_size;
571 ubi_volume_notify(ubi, vol, UBI_VOLUME_RESIZED);
572 self_check_volumes(ubi);
577 spin_lock(&ubi->volumes_lock);
578 ubi->rsvd_pebs -= pebs;
579 ubi->avail_pebs += pebs;
580 spin_unlock(&ubi->volumes_lock);
588 * ubi_rename_volumes - re-name UBI volumes.
589 * @ubi: UBI device description object
590 * @rename_list: list of &struct ubi_rename_entry objects
592 * This function re-names or removes volumes specified in the re-name list.
593 * Returns zero in case of success and a negative error code in case of
596 int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
599 struct ubi_rename_entry *re;
601 err = ubi_vtbl_rename_volumes(ubi, rename_list);
605 list_for_each_entry(re, rename_list, list) {
607 err = ubi_remove_volume(re->desc, 1);
611 struct ubi_volume *vol = re->desc->vol;
613 spin_lock(&ubi->volumes_lock);
614 vol->name_len = re->new_name_len;
615 memcpy(vol->name, re->new_name, re->new_name_len + 1);
616 spin_unlock(&ubi->volumes_lock);
617 ubi_volume_notify(ubi, vol, UBI_VOLUME_RENAMED);
622 self_check_volumes(ubi);
627 * ubi_add_volume - add volume.
628 * @ubi: UBI device description object
629 * @vol: volume description object
631 * This function adds an existing volume and initializes all its data
632 * structures. Returns zero in case of success and a negative error code in
635 int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
637 int err, vol_id = vol->vol_id;
640 dbg_gen("add volume %d", vol_id);
642 /* Register character device for the volume */
643 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
644 vol->cdev.owner = THIS_MODULE;
645 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
646 err = cdev_add(&vol->cdev, dev, 1);
648 ubi_err(ubi, "cannot add character device for volume %d, error %d",
653 vol->dev.release = vol_release;
654 vol->dev.parent = &ubi->dev;
656 vol->dev.class = ubi_class;
657 dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
658 err = device_register(&vol->dev);
662 err = volume_sysfs_init(ubi, vol);
664 cdev_del(&vol->cdev);
665 volume_sysfs_close(vol);
669 self_check_volumes(ubi);
673 cdev_del(&vol->cdev);
678 * ubi_free_volume - free volume.
679 * @ubi: UBI device description object
680 * @vol: volume description object
682 * This function frees all resources for volume @vol but does not remove it.
683 * Used only when the UBI device is detached.
685 void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
687 dbg_gen("free volume %d", vol->vol_id);
689 ubi->volumes[vol->vol_id] = NULL;
690 cdev_del(&vol->cdev);
691 volume_sysfs_close(vol);
695 * self_check_volume - check volume information.
696 * @ubi: UBI device description object
699 * Returns zero if volume is all right and a a negative error code if not.
701 static int self_check_volume(struct ubi_device *ubi, int vol_id)
703 int idx = vol_id2idx(ubi, vol_id);
704 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
705 const struct ubi_volume *vol;
709 spin_lock(&ubi->volumes_lock);
710 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
711 vol = ubi->volumes[idx];
715 ubi_err(ubi, "no volume info, but volume exists");
718 spin_unlock(&ubi->volumes_lock);
722 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
724 ubi_err(ubi, "negative values");
727 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
728 ubi_err(ubi, "bad alignment");
732 n = vol->alignment & (ubi->min_io_size - 1);
733 if (vol->alignment != 1 && n) {
734 ubi_err(ubi, "alignment is not multiple of min I/O unit");
738 n = ubi->leb_size % vol->alignment;
739 if (vol->data_pad != n) {
740 ubi_err(ubi, "bad data_pad, has to be %lld", n);
744 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
745 vol->vol_type != UBI_STATIC_VOLUME) {
746 ubi_err(ubi, "bad vol_type");
750 if (vol->upd_marker && vol->corrupted) {
751 ubi_err(ubi, "update marker and corrupted simultaneously");
755 if (vol->reserved_pebs > ubi->good_peb_count) {
756 ubi_err(ubi, "too large reserved_pebs");
760 n = ubi->leb_size - vol->data_pad;
761 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
762 ubi_err(ubi, "bad usable_leb_size, has to be %lld", n);
766 if (vol->name_len > UBI_VOL_NAME_MAX) {
767 ubi_err(ubi, "too long volume name, max is %d",
772 n = strnlen(vol->name, vol->name_len + 1);
773 if (n != vol->name_len) {
774 ubi_err(ubi, "bad name_len %lld", n);
778 n = (long long)vol->used_ebs * vol->usable_leb_size;
779 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
780 if (vol->corrupted) {
781 ubi_err(ubi, "corrupted dynamic volume");
784 if (vol->used_ebs != vol->reserved_pebs) {
785 ubi_err(ubi, "bad used_ebs");
788 if (vol->last_eb_bytes != vol->usable_leb_size) {
789 ubi_err(ubi, "bad last_eb_bytes");
792 if (vol->used_bytes != n) {
793 ubi_err(ubi, "bad used_bytes");
797 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
798 ubi_err(ubi, "bad used_ebs");
801 if (vol->last_eb_bytes < 0 ||
802 vol->last_eb_bytes > vol->usable_leb_size) {
803 ubi_err(ubi, "bad last_eb_bytes");
806 if (vol->used_bytes < 0 || vol->used_bytes > n ||
807 vol->used_bytes < n - vol->usable_leb_size) {
808 ubi_err(ubi, "bad used_bytes");
813 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
814 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
815 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
816 upd_marker = ubi->vtbl[vol_id].upd_marker;
817 name = &ubi->vtbl[vol_id].name[0];
818 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
819 vol_type = UBI_DYNAMIC_VOLUME;
821 vol_type = UBI_STATIC_VOLUME;
823 if (alignment != vol->alignment || data_pad != vol->data_pad ||
824 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
825 name_len != vol->name_len || strncmp(name, vol->name, name_len)) {
826 ubi_err(ubi, "volume info is different");
830 spin_unlock(&ubi->volumes_lock);
834 ubi_err(ubi, "self-check failed for volume %d", vol_id);
836 ubi_dump_vol_info(vol);
837 ubi_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
839 spin_unlock(&ubi->volumes_lock);
844 * self_check_volumes - check information about all volumes.
845 * @ubi: UBI device description object
847 * Returns zero if volumes are all right and a a negative error code if not.
849 static int self_check_volumes(struct ubi_device *ubi)
853 if (!ubi_dbg_chk_gen(ubi))
856 for (i = 0; i < ubi->vtbl_slots; i++) {
857 err = self_check_volume(ubi, i);