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;
200 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
204 mutex_lock(&ubi->volumes_mutex);
205 spin_lock(&ubi->volumes_lock);
206 if (vol_id == UBI_VOL_NUM_AUTO) {
207 /* Find unused volume ID */
208 dbg_msg("search for vacant volume ID");
209 for (i = 0; i < ubi->vtbl_slots; i++)
210 if (!ubi->volumes[i]) {
215 if (vol_id == UBI_VOL_NUM_AUTO) {
216 dbg_err("out of volume IDs");
220 req->vol_id = vol_id;
223 dbg_msg("volume ID %d, %llu bytes, type %d, name %s",
224 vol_id, (unsigned long long)req->bytes,
225 (int)req->vol_type, req->name);
227 /* Ensure that this volume does not exist */
229 if (ubi->volumes[vol_id]) {
230 dbg_err("volume %d already exists", vol_id);
234 /* Ensure that the name is unique */
235 for (i = 0; i < ubi->vtbl_slots; i++)
236 if (ubi->volumes[i] &&
237 ubi->volumes[i]->name_len == req->name_len &&
238 !strcmp(ubi->volumes[i]->name, req->name)) {
239 dbg_err("volume \"%s\" exists (ID %d)", req->name, i);
243 /* Calculate how many eraseblocks are requested */
244 vol->usable_leb_size = ubi->leb_size - ubi->leb_size % req->alignment;
246 if (do_div(bytes, vol->usable_leb_size))
247 vol->reserved_pebs = 1;
248 vol->reserved_pebs += bytes;
250 /* Reserve physical eraseblocks */
251 if (vol->reserved_pebs > ubi->avail_pebs) {
252 dbg_err("not enough PEBs, only %d available", ubi->avail_pebs);
256 ubi->avail_pebs -= vol->reserved_pebs;
257 ubi->rsvd_pebs += vol->reserved_pebs;
259 vol->vol_id = vol_id;
260 vol->alignment = req->alignment;
261 vol->data_pad = ubi->leb_size % vol->alignment;
262 vol->vol_type = req->vol_type;
263 vol->name_len = req->name_len;
264 memcpy(vol->name, req->name, vol->name_len + 1);
267 ubi->volumes[vol_id] = vol;
268 spin_unlock(&ubi->volumes_lock);
271 * Finish all pending erases because there may be some LEBs belonging
272 * to the same volume ID.
274 err = ubi_wl_flush(ubi);
278 vol->eba_tbl = kmalloc(vol->reserved_pebs * sizeof(int), GFP_KERNEL);
284 for (i = 0; i < vol->reserved_pebs; i++)
285 vol->eba_tbl[i] = UBI_LEB_UNMAPPED;
287 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
288 vol->used_ebs = vol->reserved_pebs;
289 vol->last_eb_bytes = vol->usable_leb_size;
291 (long long)vol->used_ebs * vol->usable_leb_size;
293 bytes = vol->used_bytes;
294 vol->last_eb_bytes = do_div(bytes, vol->usable_leb_size);
295 vol->used_ebs = bytes;
296 if (vol->last_eb_bytes)
299 vol->last_eb_bytes = vol->usable_leb_size;
302 /* Register character device for the volume */
303 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
304 vol->cdev.owner = THIS_MODULE;
305 dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
306 err = cdev_add(&vol->cdev, dev, 1);
308 ubi_err("cannot add character device");
312 err = ubi_create_gluebi(ubi, vol);
316 vol->dev.release = vol_release;
317 vol->dev.parent = &ubi->dev;
319 vol->dev.class = ubi_class;
320 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
321 err = device_register(&vol->dev);
323 ubi_err("cannot register device");
327 err = volume_sysfs_init(ubi, vol);
331 /* Fill volume table record */
332 memset(&vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
333 vtbl_rec.reserved_pebs = cpu_to_be32(vol->reserved_pebs);
334 vtbl_rec.alignment = cpu_to_be32(vol->alignment);
335 vtbl_rec.data_pad = cpu_to_be32(vol->data_pad);
336 vtbl_rec.name_len = cpu_to_be16(vol->name_len);
337 if (vol->vol_type == UBI_DYNAMIC_VOLUME)
338 vtbl_rec.vol_type = UBI_VID_DYNAMIC;
340 vtbl_rec.vol_type = UBI_VID_STATIC;
341 memcpy(vtbl_rec.name, vol->name, vol->name_len + 1);
343 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
347 spin_lock(&ubi->volumes_lock);
350 spin_unlock(&ubi->volumes_lock);
352 paranoid_check_volumes(ubi);
353 mutex_unlock(&ubi->volumes_mutex);
357 err = ubi_destroy_gluebi(vol);
359 cdev_del(&vol->cdev);
363 spin_lock(&ubi->volumes_lock);
364 ubi->rsvd_pebs -= vol->reserved_pebs;
365 ubi->avail_pebs += vol->reserved_pebs;
366 ubi->volumes[vol_id] = NULL;
368 spin_unlock(&ubi->volumes_lock);
369 mutex_unlock(&ubi->volumes_mutex);
371 ubi_err("cannot create volume %d, error %d", vol_id, err);
375 * We are registered, so @vol is destroyed in the release function and
376 * we have to de-initialize differently.
379 err = ubi_destroy_gluebi(vol);
380 cdev_del(&vol->cdev);
382 spin_lock(&ubi->volumes_lock);
383 ubi->rsvd_pebs -= vol->reserved_pebs;
384 ubi->avail_pebs += vol->reserved_pebs;
385 ubi->volumes[vol_id] = NULL;
386 spin_unlock(&ubi->volumes_lock);
387 mutex_unlock(&ubi->volumes_mutex);
388 volume_sysfs_close(vol);
389 ubi_err("cannot create volume %d, error %d", vol_id, err);
394 * ubi_remove_volume - remove volume.
395 * @desc: volume descriptor
397 * This function removes volume described by @desc. The volume has to be opened
398 * in "exclusive" mode. Returns zero in case of success and a negative error
399 * code in case of failure.
401 int ubi_remove_volume(struct ubi_volume_desc *desc)
403 struct ubi_volume *vol = desc->vol;
404 struct ubi_device *ubi = vol->ubi;
405 int i, err, vol_id = vol->vol_id, reserved_pebs = vol->reserved_pebs;
407 dbg_msg("remove UBI volume %d", vol_id);
408 ubi_assert(desc->mode == UBI_EXCLUSIVE);
409 ubi_assert(vol == ubi->volumes[vol_id]);
414 mutex_lock(&ubi->volumes_mutex);
415 err = ubi_destroy_gluebi(vol);
419 err = ubi_change_vtbl_record(ubi, vol_id, NULL);
423 for (i = 0; i < vol->reserved_pebs; i++) {
424 err = ubi_eba_unmap_leb(ubi, vol, i);
429 spin_lock(&ubi->volumes_lock);
431 ubi->volumes[vol_id] = NULL;
432 spin_unlock(&ubi->volumes_lock);
436 cdev_del(&vol->cdev);
437 volume_sysfs_close(vol);
439 spin_lock(&ubi->volumes_lock);
440 ubi->rsvd_pebs -= reserved_pebs;
441 ubi->avail_pebs += reserved_pebs;
442 i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
444 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
445 ubi->avail_pebs -= i;
447 ubi->beb_rsvd_pebs += i;
449 ubi_msg("reserve more %d PEBs", i);
452 spin_unlock(&ubi->volumes_lock);
454 paranoid_check_volumes(ubi);
456 mutex_unlock(&ubi->volumes_mutex);
461 * ubi_resize_volume - re-size volume.
462 * @desc: volume descriptor
463 * @reserved_pebs: new size in physical eraseblocks
465 * This function returns zero in case of success, and a negative error code in
468 int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
470 int i, err, pebs, *new_mapping;
471 struct ubi_volume *vol = desc->vol;
472 struct ubi_device *ubi = vol->ubi;
473 struct ubi_vtbl_record vtbl_rec;
474 int vol_id = vol->vol_id;
479 dbg_msg("re-size volume %d to from %d to %d PEBs",
480 vol_id, vol->reserved_pebs, reserved_pebs);
481 ubi_assert(desc->mode == UBI_EXCLUSIVE);
482 ubi_assert(vol == ubi->volumes[vol_id]);
484 if (vol->vol_type == UBI_STATIC_VOLUME &&
485 reserved_pebs < vol->used_ebs) {
486 dbg_err("too small size %d, %d LEBs contain data",
487 reserved_pebs, vol->used_ebs);
491 /* If the size is the same, we have nothing to do */
492 if (reserved_pebs == vol->reserved_pebs)
495 new_mapping = kmalloc(reserved_pebs * sizeof(int), GFP_KERNEL);
499 for (i = 0; i < reserved_pebs; i++)
500 new_mapping[i] = UBI_LEB_UNMAPPED;
502 /* Reserve physical eraseblocks */
503 mutex_lock(&ubi->volumes_mutex);
504 pebs = reserved_pebs - vol->reserved_pebs;
506 spin_lock(&ubi->volumes_lock);
507 if (pebs > ubi->avail_pebs) {
508 dbg_err("not enough PEBs: requested %d, available %d",
509 pebs, ubi->avail_pebs);
510 spin_unlock(&ubi->volumes_lock);
514 ubi->avail_pebs -= pebs;
515 ubi->rsvd_pebs += pebs;
516 for (i = 0; i < vol->reserved_pebs; i++)
517 new_mapping[i] = vol->eba_tbl[i];
519 vol->eba_tbl = new_mapping;
520 spin_unlock(&ubi->volumes_lock);
523 /* Change volume table record */
524 memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
525 vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
526 err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
531 for (i = 0; i < -pebs; i++) {
532 err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
536 spin_lock(&ubi->volumes_lock);
537 ubi->rsvd_pebs += pebs;
538 ubi->avail_pebs -= pebs;
539 pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
541 pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs;
542 ubi->avail_pebs -= pebs;
543 ubi->rsvd_pebs += pebs;
544 ubi->beb_rsvd_pebs += pebs;
546 ubi_msg("reserve more %d PEBs", pebs);
548 for (i = 0; i < reserved_pebs; i++)
549 new_mapping[i] = vol->eba_tbl[i];
551 vol->eba_tbl = new_mapping;
552 spin_unlock(&ubi->volumes_lock);
555 vol->reserved_pebs = reserved_pebs;
556 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
557 vol->used_ebs = reserved_pebs;
558 vol->last_eb_bytes = vol->usable_leb_size;
560 (long long)vol->used_ebs * vol->usable_leb_size;
563 paranoid_check_volumes(ubi);
564 mutex_unlock(&ubi->volumes_mutex);
569 spin_lock(&ubi->volumes_lock);
570 ubi->rsvd_pebs -= pebs;
571 ubi->avail_pebs += pebs;
572 spin_unlock(&ubi->volumes_lock);
576 mutex_unlock(&ubi->volumes_mutex);
581 * ubi_add_volume - add volume.
582 * @ubi: UBI device description object
583 * @vol: volume description object
585 * This function adds an existin volume and initializes all its data
586 * structures. Returnes zero in case of success and a negative error code in
589 int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
591 int err, vol_id = vol->vol_id;
594 dbg_msg("add volume %d", vol_id);
595 ubi_dbg_dump_vol_info(vol);
598 /* Register character device for the volume */
599 cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
600 vol->cdev.owner = THIS_MODULE;
601 dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
602 err = cdev_add(&vol->cdev, dev, 1);
604 ubi_err("cannot add character device for volume %d, error %d",
609 err = ubi_create_gluebi(ubi, vol);
613 vol->dev.release = vol_release;
614 vol->dev.parent = &ubi->dev;
616 vol->dev.class = ubi_class;
617 sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id);
618 err = device_register(&vol->dev);
622 err = volume_sysfs_init(ubi, vol);
624 cdev_del(&vol->cdev);
625 err = ubi_destroy_gluebi(vol);
626 volume_sysfs_close(vol);
630 paranoid_check_volumes(ubi);
634 err = ubi_destroy_gluebi(vol);
636 cdev_del(&vol->cdev);
641 * ubi_free_volume - free volume.
642 * @ubi: UBI device description object
643 * @vol: volume description object
645 * This function frees all resources for volume @vol but does not remove it.
646 * Used only when the UBI device is detached.
648 void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol)
652 dbg_msg("free volume %d", vol->vol_id);
656 err = ubi_destroy_gluebi(vol);
657 ubi->volumes[vol->vol_id] = NULL;
658 cdev_del(&vol->cdev);
659 volume_sysfs_close(vol);
662 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
665 * paranoid_check_volume - check volume information.
666 * @ubi: UBI device description object
669 static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
671 int idx = vol_id2idx(ubi, vol_id);
672 int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
673 const struct ubi_volume *vol;
677 spin_lock(&ubi->volumes_lock);
678 reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
679 vol = ubi->volumes[idx];
683 ubi_err("no volume info, but volume exists");
686 spin_unlock(&ubi->volumes_lock);
690 if (vol->exclusive) {
692 * The volume may be being created at the moment, do not check
693 * it (e.g., it may be in the middle of ubi_create_volume().
695 spin_unlock(&ubi->volumes_lock);
699 if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
701 ubi_err("negative values");
704 if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
705 ubi_err("bad alignment");
709 n = vol->alignment % ubi->min_io_size;
710 if (vol->alignment != 1 && n) {
711 ubi_err("alignment is not multiple of min I/O unit");
715 n = ubi->leb_size % vol->alignment;
716 if (vol->data_pad != n) {
717 ubi_err("bad data_pad, has to be %lld", n);
721 if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
722 vol->vol_type != UBI_STATIC_VOLUME) {
723 ubi_err("bad vol_type");
727 if (vol->upd_marker != 0 && vol->upd_marker != 1) {
728 ubi_err("bad upd_marker");
732 if (vol->upd_marker && vol->corrupted) {
733 dbg_err("update marker and corrupted simultaneously");
737 if (vol->reserved_pebs > ubi->good_peb_count) {
738 ubi_err("too large reserved_pebs");
742 n = ubi->leb_size - vol->data_pad;
743 if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
744 ubi_err("bad usable_leb_size, has to be %lld", n);
748 if (vol->name_len > UBI_VOL_NAME_MAX) {
749 ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
754 ubi_err("NULL volume name");
758 n = strnlen(vol->name, vol->name_len + 1);
759 if (n != vol->name_len) {
760 ubi_err("bad name_len %lld", n);
764 n = (long long)vol->used_ebs * vol->usable_leb_size;
765 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
766 if (vol->corrupted != 0) {
767 ubi_err("corrupted dynamic volume");
770 if (vol->used_ebs != vol->reserved_pebs) {
771 ubi_err("bad used_ebs");
774 if (vol->last_eb_bytes != vol->usable_leb_size) {
775 ubi_err("bad last_eb_bytes");
778 if (vol->used_bytes != n) {
779 ubi_err("bad used_bytes");
783 if (vol->corrupted != 0 && vol->corrupted != 1) {
784 ubi_err("bad corrupted");
787 if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
788 ubi_err("bad used_ebs");
791 if (vol->last_eb_bytes < 0 ||
792 vol->last_eb_bytes > vol->usable_leb_size) {
793 ubi_err("bad last_eb_bytes");
796 if (vol->used_bytes < 0 || vol->used_bytes > n ||
797 vol->used_bytes < n - vol->usable_leb_size) {
798 ubi_err("bad used_bytes");
803 alignment = be32_to_cpu(ubi->vtbl[vol_id].alignment);
804 data_pad = be32_to_cpu(ubi->vtbl[vol_id].data_pad);
805 name_len = be16_to_cpu(ubi->vtbl[vol_id].name_len);
806 upd_marker = ubi->vtbl[vol_id].upd_marker;
807 name = &ubi->vtbl[vol_id].name[0];
808 if (ubi->vtbl[vol_id].vol_type == UBI_VID_DYNAMIC)
809 vol_type = UBI_DYNAMIC_VOLUME;
811 vol_type = UBI_STATIC_VOLUME;
813 if (alignment != vol->alignment || data_pad != vol->data_pad ||
814 upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
815 name_len!= vol->name_len || strncmp(name, vol->name, name_len)) {
816 ubi_err("volume info is different");
820 spin_unlock(&ubi->volumes_lock);
824 ubi_err("paranoid check failed for volume %d", vol_id);
825 ubi_dbg_dump_vol_info(vol);
826 ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
827 spin_unlock(&ubi->volumes_lock);
832 * paranoid_check_volumes - check information about all volumes.
833 * @ubi: UBI device description object
835 static void paranoid_check_volumes(struct ubi_device *ubi)
839 for (i = 0; i < ubi->vtbl_slots; i++)
840 paranoid_check_volume(ubi, i);