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 * 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->volumes_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;
214 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
218 spin_lock(&ubi->volumes_lock);
219 if (vol_id == UBI_VOL_NUM_AUTO) {
220 /* Find unused volume ID */
221 dbg_msg("search for vacant volume ID");
222 for (i = 0; i < ubi->vtbl_slots; i++)
223 if (!ubi->volumes[i]) {
228 if (vol_id == UBI_VOL_NUM_AUTO) {
229 dbg_err("out of volume IDs");
233 req->vol_id = vol_id;
236 dbg_msg("volume ID %d, %llu bytes, type %d, name %s",
237 vol_id, (unsigned long long)req->bytes,
238 (int)req->vol_type, req->name);
240 /* Ensure that this volume does not exist */
242 if (ubi->volumes[vol_id]) {
243 dbg_err("volume %d already exists", vol_id);
247 /* Ensure that the name is unique */
248 for (i = 0; i < ubi->vtbl_slots; i++)
249 if (ubi->volumes[i] &&
250 ubi->volumes[i]->name_len == req->name_len &&
251 !strcmp(ubi->volumes[i]->name, req->name)) {
252 dbg_err("volume \"%s\" exists (ID %d)", req->name, i);
256 /* Calculate how many eraseblocks are requested */
257 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
259 if (do_div(bytes, vol->usable_leb_size))
260 vol->reserved_pebs = 1;
261 vol->reserved_pebs += bytes;
263 /* Reserve physical eraseblocks */
264 if (vol->reserved_pebs > ubi->avail_pebs) {
265 dbg_err("not enough PEBs, only %d available", ubi->avail_pebs);
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);
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 bytes = vol->used_bytes;
305 vol->last_eb_bytes = do_div(bytes, vol->usable_leb_size);
306 vol->used_ebs = bytes;
307 if (vol->last_eb_bytes)
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("cannot add character device");
323 err = ubi_create_gluebi(ubi, vol);
327 vol->dev.release = vol_release;
328 vol->dev.parent = &ubi->dev;
330 vol->dev.class = ubi_class;
332 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
333 err = device_register(&vol->dev);
335 ubi_err("cannot register device");
339 err = volume_sysfs_init(ubi, vol);
343 /* Fill volume table record */
344 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
345 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
346 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
347 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
348 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
349 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
350 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
352 vtbl_rec.vol_type = UBI_VID_STATIC;
353 memcpy(vtbl_rec.name, vol->name, vol->name_len);
355 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
359 spin_lock(&ubi->volumes_lock);
360 ubi->volumes[vol_id] = vol;
362 spin_unlock(&ubi->volumes_lock);
364 paranoid_check_volumes(ubi);
369 * We have registered our device, we should not free the volume
370 * description object in this function in case of an error - it is
371 * freed by the release function.
373 * Get device reference to prevent the release function from being
374 * called just after sysfs has been closed.
377 get_device(&vol->dev);
378 volume_sysfs_close(vol);
380 if (ubi_destroy_gluebi(vol))
381 dbg_err("cannot destroy gluebi for volume %d:%d",
382 ubi->ubi_num, vol_id);
384 cdev_del(&vol->cdev);
389 spin_lock(&ubi->volumes_lock);
390 ubi->rsvd_pebs -= vol->reserved_pebs;
391 ubi->avail_pebs += vol->reserved_pebs;
393 spin_unlock(&ubi->volumes_lock);
397 put_device(&vol->dev);
398 ubi_err("cannot create volume %d, error %d", vol_id, err);
403 * ubi_remove_volume - remove volume.
404 * @desc: volume descriptor
406 * This function removes volume described by @desc. The volume has to be opened
407 * in "exclusive" mode. Returns zero in case of success and a negative error
408 * code in case of failure. The caller has to have the @ubi->volumes_mutex
411 int ubi_remove_volume(struct ubi_volume_desc *desc)
413 struct ubi_volume *vol = desc->vol;
414 struct ubi_device *ubi = vol->ubi;
415 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
417 dbg_msg("remove UBI volume %d", vol_id);
418 ubi_assert(desc->mode == UBI_EXCLUSIVE);
419 ubi_assert(vol == ubi->volumes[vol_id]);
424 spin_lock(&ubi->volumes_lock);
425 if (vol->ref_count > 1) {
427 * The volume is busy, probably someone is reading one of its
433 ubi->volumes[vol_id] = NULL;
434 spin_unlock(&ubi->volumes_lock);
436 err = ubi_destroy_gluebi(vol);
440 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
444 for (i = 0; i < vol->reserved_pebs; i++) {
445 err = ubi_eba_unmap_leb(ubi, vol, i);
450 cdev_del(&vol->cdev);
451 volume_sysfs_close(vol);
453 spin_lock(&ubi->volumes_lock);
454 ubi->rsvd_pebs -= reserved_pebs;
455 ubi->avail_pebs += reserved_pebs;
456 i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
458 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
459 ubi->avail_pebs -= i;
461 ubi->beb_rsvd_pebs += i;
463 ubi_msg("reserve more %d PEBs", i);
466 spin_unlock(&ubi->volumes_lock);
468 paranoid_check_volumes(ubi);
472 ubi_err("cannot remove volume %d, error %d", vol_id, err);
473 spin_lock(&ubi->volumes_lock);
474 ubi->volumes[vol_id] = vol;
476 spin_unlock(&ubi->volumes_lock);
481 * ubi_resize_volume - re-size volume.
482 * @desc: volume descriptor
483 * @reserved_pebs: new size in physical eraseblocks
485 * This function re-sizes the volume and returns zero in case of success, and a
486 * negative error code in case of failure. The caller has to have the
487 * @ubi->volumes_mutex locked.
489 int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
491 int i, err, pebs, *new_mapping;
492 struct ubi_volume *vol = desc->vol;
493 struct ubi_device *ubi = vol->ubi;
494 struct ubi_vtbl_record vtbl_rec;
495 int vol_id = vol->vol_id;
500 dbg_msg("re-size volume %d to from %d to %d PEBs",
501 vol_id, vol->reserved_pebs, reserved_pebs);
503 if (vol->vol_type == UBI_STATIC_VOLUME &&
504 reserved_pebs < vol->used_ebs) {
505 dbg_err("too small size %d, %d LEBs contain data",
506 reserved_pebs, vol->used_ebs);
510 /* If the size is the same, we have nothing to do */
511 if (reserved_pebs == vol->reserved_pebs)
514 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
518 for (i = 0; i < reserved_pebs; i++)
519 new_mapping[i] = UBI_LEB_UNMAPPED;
521 spin_lock(&ubi->volumes_lock);
522 if (vol->ref_count > 1) {
523 spin_unlock(&ubi->volumes_lock);
527 spin_unlock(&ubi->volumes_lock);
529 /* Reserve physical eraseblocks */
530 pebs = reserved_pebs - vol->reserved_pebs;
532 spin_lock(&ubi->volumes_lock);
533 if (pebs > ubi->avail_pebs) {
534 dbg_err("not enough PEBs: requested %d, available %d",
535 pebs, ubi->avail_pebs);
536 spin_unlock(&ubi->volumes_lock);
540 ubi->avail_pebs -= pebs;
541 ubi->rsvd_pebs += pebs;
542 for (i = 0; i < vol->reserved_pebs; i++)
543 new_mapping[i] = vol->eba_tbl[i];
545 vol->eba_tbl = new_mapping;
546 spin_unlock(&ubi->volumes_lock);
549 /* Change volume table record */
550 memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
551 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
552 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
557 for (i = 0; i < -pebs; i++) {
558 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
562 spin_lock(&ubi->volumes_lock);
563 ubi->rsvd_pebs += pebs;
564 ubi->avail_pebs -= pebs;
565 pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
567 pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs;
568 ubi->avail_pebs -= pebs;
569 ubi->rsvd_pebs += pebs;
570 ubi->beb_rsvd_pebs += pebs;
572 ubi_msg("reserve more %d PEBs", pebs);
574 for (i = 0; i < reserved_pebs; i++)
575 new_mapping[i] = vol->eba_tbl[i];
577 vol->eba_tbl = new_mapping;
578 spin_unlock(&ubi->volumes_lock);
581 vol->reserved_pebs = reserved_pebs;
582 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
583 vol->used_ebs = reserved_pebs;
584 vol->last_eb_bytes = vol->usable_leb_size;
586 (long long)vol->used_ebs * vol->usable_leb_size;
589 paranoid_check_volumes(ubi);
594 spin_lock(&ubi->volumes_lock);
595 ubi->rsvd_pebs -= pebs;
596 ubi->avail_pebs += pebs;
597 spin_unlock(&ubi->volumes_lock);
605 * ubi_add_volume - add volume.
606 * @ubi: UBI device description object
607 * @vol: volume description object
609 * This function adds an existing volume and initializes all its data
610 * structures. Returns zero in case of success and a negative error code in
613 int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
615 int err, vol_id = vol->vol_id;
618 dbg_msg("add volume %d", vol_id);
619 ubi_dbg_dump_vol_info(vol);
621 /* Register character device for the volume */
622 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
623 vol->cdev.owner = THIS_MODULE;
624 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
625 err = cdev_add(&vol->cdev, dev, 1);
627 ubi_err("cannot add character device for volume %d, error %d",
632 err = ubi_create_gluebi(ubi, vol);
636 vol->dev.release = vol_release;
637 vol->dev.parent = &ubi->dev;
639 vol->dev.class = ubi_class;
640 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
641 err = device_register(&vol->dev);
645 err = volume_sysfs_init(ubi, vol);
647 cdev_del(&vol->cdev);
648 err = ubi_destroy_gluebi(vol);
649 volume_sysfs_close(vol);
653 paranoid_check_volumes(ubi);
657 err = ubi_destroy_gluebi(vol);
659 cdev_del(&vol->cdev);
664 * ubi_free_volume - free volume.
665 * @ubi: UBI device description object
666 * @vol: volume description object
668 * This function frees all resources for volume @vol but does not remove it.
669 * Used only when the UBI device is detached.
671 void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
675 dbg_msg("free volume %d", vol->vol_id);
677 ubi->volumes[vol->vol_id] = NULL;
678 err = ubi_destroy_gluebi(vol);
679 cdev_del(&vol->cdev);
680 volume_sysfs_close(vol);
683 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
686 * paranoid_check_volume - check volume information.
687 * @ubi: UBI device description object
690 static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
692 int idx = vol_id2idx(ubi, vol_id);
693 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
694 const struct ubi_volume *vol;
698 spin_lock(&ubi->volumes_lock);
699 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
700 vol = ubi->volumes[idx];
704 ubi_err("no volume info, but volume exists");
707 spin_unlock(&ubi->volumes_lock);
711 if (vol->exclusive) {
713 * The volume may be being created at the moment, do not check
714 * it (e.g., it may be in the middle of ubi_create_volume().
716 spin_unlock(&ubi->volumes_lock);
720 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
722 ubi_err("negative values");
725 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
726 ubi_err("bad alignment");
730 n = vol->alignment & (ubi->min_io_size - 1);
731 if (vol->alignment != 1 && n) {
732 ubi_err("alignment is not multiple of min I/O unit");
736 n = ubi->leb_size % vol->alignment;
737 if (vol->data_pad != n) {
738 ubi_err("bad data_pad, has to be %lld", n);
742 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
743 vol->vol_type != UBI_STATIC_VOLUME) {
744 ubi_err("bad vol_type");
748 if (vol->upd_marker && vol->corrupted) {
749 dbg_err("update marker and corrupted simultaneously");
753 if (vol->reserved_pebs > ubi->good_peb_count) {
754 ubi_err("too large reserved_pebs");
758 n = ubi->leb_size - vol->data_pad;
759 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
760 ubi_err("bad usable_leb_size, has to be %lld", n);
764 if (vol->name_len > UBI_VOL_NAME_MAX) {
765 ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
770 ubi_err("NULL volume name");
774 n = strnlen(vol->name, vol->name_len + 1);
775 if (n != vol->name_len) {
776 ubi_err("bad name_len %lld", n);
780 n = (long long)vol->used_ebs * vol->usable_leb_size;
781 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
782 if (vol->corrupted) {
783 ubi_err("corrupted dynamic volume");
786 if (vol->used_ebs != vol->reserved_pebs) {
787 ubi_err("bad used_ebs");
790 if (vol->last_eb_bytes != vol->usable_leb_size) {
791 ubi_err("bad last_eb_bytes");
794 if (vol->used_bytes != n) {
795 ubi_err("bad used_bytes");
799 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
800 ubi_err("bad used_ebs");
803 if (vol->last_eb_bytes < 0 ||
804 vol->last_eb_bytes > vol->usable_leb_size) {
805 ubi_err("bad last_eb_bytes");
808 if (vol->used_bytes < 0 || vol->used_bytes > n ||
809 vol->used_bytes < n - vol->usable_leb_size) {
810 ubi_err("bad used_bytes");
815 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
816 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
817 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
818 upd_marker = ubi->vtbl[vol_id].upd_marker;
819 name = &ubi->vtbl[vol_id].name[0];
820 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
821 vol_type = UBI_DYNAMIC_VOLUME;
823 vol_type = UBI_STATIC_VOLUME;
825 if (alignment != vol->alignment || data_pad != vol->data_pad ||
826 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
827 name_len!= vol->name_len || strncmp(name, vol->name, name_len)) {
828 ubi_err("volume info is different");
832 spin_unlock(&ubi->volumes_lock);
836 ubi_err("paranoid check failed for volume %d", vol_id);
837 ubi_dbg_dump_vol_info(vol);
838 ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
839 spin_unlock(&ubi->volumes_lock);
844 * paranoid_check_volumes - check information about all volumes.
845 * @ubi: UBI device description object
847 static void paranoid_check_volumes(struct ubi_device *ubi)
851 for (i = 0; i < ubi->vtbl_slots; i++)
852 paranoid_check_volume(ubi, i);