2 * Copyright (c) International Business Machines Corp., 2006
3 * Copyright (c) Nokia Corporation, 2006, 2007
5 * SPDX-License-Identifier: GPL-2.0+
7 * Author: Artem Bityutskiy (Битюцкий Артём)
11 * This file includes volume table manipulation code. The volume table is an
12 * on-flash table containing volume meta-data like name, number of reserved
13 * physical eraseblocks, type, etc. The volume table is stored in the so-called
16 * The layout volume is an internal volume which is organized as follows. It
17 * consists of two logical eraseblocks - LEB 0 and LEB 1. Each logical
18 * eraseblock stores one volume table copy, i.e. LEB 0 and LEB 1 duplicate each
19 * other. This redundancy guarantees robustness to unclean reboots. The volume
20 * table is basically an array of volume table records. Each record contains
21 * full information about the volume and protected by a CRC checksum.
23 * The volume table is changed, it is first changed in RAM. Then LEB 0 is
24 * erased, and the updated volume table is written back to LEB 0. Then same for
25 * LEB 1. This scheme guarantees recoverability from unclean reboots.
27 * In this UBI implementation the on-flash volume table does not contain any
28 * information about how much data static volumes contain.
30 * But it would still be beneficial to store this information in the volume
31 * table. For example, suppose we have a static volume X, and all its physical
32 * eraseblocks became bad for some reasons. Suppose we are attaching the
33 * corresponding MTD device, for some reason we find no logical eraseblocks
34 * corresponding to the volume X. According to the volume table volume X does
35 * exist. So we don't know whether it is just empty or all its physical
36 * eraseblocks went bad. So we cannot alarm the user properly.
38 * The volume table also stores so-called "update marker", which is used for
39 * volume updates. Before updating the volume, the update marker is set, and
40 * after the update operation is finished, the update marker is cleared. So if
41 * the update operation was interrupted (e.g. by an unclean reboot) - the
42 * update marker is still there and we know that the volume's contents is
48 #include <linux/crc32.h>
49 #include <linux/err.h>
50 #include <linux/slab.h>
51 #include <asm/div64.h>
53 #include <ubi_uboot.h>
56 #include <linux/err.h>
59 static void self_vtbl_check(const struct ubi_device *ubi);
61 /* Empty volume table record */
62 static struct ubi_vtbl_record empty_vtbl_record;
65 * ubi_change_vtbl_record - change volume table record.
66 * @ubi: UBI device description object
67 * @idx: table index to change
68 * @vtbl_rec: new volume table record
70 * This function changes volume table record @idx. If @vtbl_rec is %NULL, empty
71 * volume table record is written. The caller does not have to calculate CRC of
72 * the record as it is done by this function. Returns zero in case of success
73 * and a negative error code in case of failure.
75 int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
76 struct ubi_vtbl_record *vtbl_rec)
80 struct ubi_volume *layout_vol;
82 ubi_assert(idx >= 0 && idx < ubi->vtbl_slots);
83 layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)];
86 vtbl_rec = &empty_vtbl_record;
88 crc = crc32(UBI_CRC32_INIT, vtbl_rec, UBI_VTBL_RECORD_SIZE_CRC);
89 vtbl_rec->crc = cpu_to_be32(crc);
92 memcpy(&ubi->vtbl[idx], vtbl_rec, sizeof(struct ubi_vtbl_record));
93 for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
94 err = ubi_eba_unmap_leb(ubi, layout_vol, i);
98 err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
104 self_vtbl_check(ubi);
109 * ubi_vtbl_rename_volumes - rename UBI volumes in the volume table.
110 * @ubi: UBI device description object
111 * @rename_list: list of &struct ubi_rename_entry objects
113 * This function re-names multiple volumes specified in @req in the volume
114 * table. Returns zero in case of success and a negative error code in case of
117 int ubi_vtbl_rename_volumes(struct ubi_device *ubi,
118 struct list_head *rename_list)
121 struct ubi_rename_entry *re;
122 struct ubi_volume *layout_vol;
124 list_for_each_entry(re, rename_list, list) {
126 struct ubi_volume *vol = re->desc->vol;
127 struct ubi_vtbl_record *vtbl_rec = &ubi->vtbl[vol->vol_id];
130 memcpy(vtbl_rec, &empty_vtbl_record,
131 sizeof(struct ubi_vtbl_record));
135 vtbl_rec->name_len = cpu_to_be16(re->new_name_len);
136 memcpy(vtbl_rec->name, re->new_name, re->new_name_len);
137 memset(vtbl_rec->name + re->new_name_len, 0,
138 UBI_VOL_NAME_MAX + 1 - re->new_name_len);
139 crc = crc32(UBI_CRC32_INIT, vtbl_rec,
140 UBI_VTBL_RECORD_SIZE_CRC);
141 vtbl_rec->crc = cpu_to_be32(crc);
144 layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)];
145 for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
146 err = ubi_eba_unmap_leb(ubi, layout_vol, i);
150 err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
160 * vtbl_check - check if volume table is not corrupted and sensible.
161 * @ubi: UBI device description object
162 * @vtbl: volume table
164 * This function returns zero if @vtbl is all right, %1 if CRC is incorrect,
165 * and %-EINVAL if it contains inconsistent data.
167 static int vtbl_check(const struct ubi_device *ubi,
168 const struct ubi_vtbl_record *vtbl)
170 int i, n, reserved_pebs, alignment, data_pad, vol_type, name_len;
175 for (i = 0; i < ubi->vtbl_slots; i++) {
178 reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs);
179 alignment = be32_to_cpu(vtbl[i].alignment);
180 data_pad = be32_to_cpu(vtbl[i].data_pad);
181 upd_marker = vtbl[i].upd_marker;
182 vol_type = vtbl[i].vol_type;
183 name_len = be16_to_cpu(vtbl[i].name_len);
184 name = &vtbl[i].name[0];
186 crc = crc32(UBI_CRC32_INIT, &vtbl[i], UBI_VTBL_RECORD_SIZE_CRC);
187 if (be32_to_cpu(vtbl[i].crc) != crc) {
188 ubi_err("bad CRC at record %u: %#08x, not %#08x",
189 i, crc, be32_to_cpu(vtbl[i].crc));
190 ubi_dump_vtbl_record(&vtbl[i], i);
194 if (reserved_pebs == 0) {
195 if (memcmp(&vtbl[i], &empty_vtbl_record,
196 UBI_VTBL_RECORD_SIZE)) {
203 if (reserved_pebs < 0 || alignment < 0 || data_pad < 0 ||
209 if (alignment > ubi->leb_size || alignment == 0) {
214 n = alignment & (ubi->min_io_size - 1);
215 if (alignment != 1 && n) {
220 n = ubi->leb_size % alignment;
222 ubi_err("bad data_pad, has to be %d", n);
227 if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
232 if (upd_marker != 0 && upd_marker != 1) {
237 if (reserved_pebs > ubi->good_peb_count) {
238 ubi_err("too large reserved_pebs %d, good PEBs %d",
239 reserved_pebs, ubi->good_peb_count);
244 if (name_len > UBI_VOL_NAME_MAX) {
249 if (name[0] == '\0') {
254 if (name_len != strnlen(name, name_len + 1)) {
260 /* Checks that all names are unique */
261 for (i = 0; i < ubi->vtbl_slots - 1; i++) {
262 for (n = i + 1; n < ubi->vtbl_slots; n++) {
263 int len1 = be16_to_cpu(vtbl[i].name_len);
264 int len2 = be16_to_cpu(vtbl[n].name_len);
266 if (len1 > 0 && len1 == len2 &&
268 !strncmp(vtbl[i].name, vtbl[n].name, len1)) {
270 !strncmp((char *)vtbl[i].name, vtbl[n].name, len1)) {
272 ubi_err("volumes %d and %d have the same name \"%s\"",
274 ubi_dump_vtbl_record(&vtbl[i], i);
275 ubi_dump_vtbl_record(&vtbl[n], n);
284 ubi_err("volume table check failed: record %d, error %d", i, err);
285 ubi_dump_vtbl_record(&vtbl[i], i);
290 * create_vtbl - create a copy of volume table.
291 * @ubi: UBI device description object
292 * @ai: attaching information
293 * @copy: number of the volume table copy
294 * @vtbl: contents of the volume table
296 * This function returns zero in case of success and a negative error code in
299 static int create_vtbl(struct ubi_device *ubi, struct ubi_attach_info *ai,
300 int copy, void *vtbl)
303 struct ubi_vid_hdr *vid_hdr;
304 struct ubi_ainf_peb *new_aeb;
306 dbg_gen("create volume table (copy #%d)", copy + 1);
308 vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
313 new_aeb = ubi_early_get_peb(ubi, ai);
314 if (IS_ERR(new_aeb)) {
315 err = PTR_ERR(new_aeb);
319 vid_hdr->vol_type = UBI_LAYOUT_VOLUME_TYPE;
320 vid_hdr->vol_id = cpu_to_be32(UBI_LAYOUT_VOLUME_ID);
321 vid_hdr->compat = UBI_LAYOUT_VOLUME_COMPAT;
322 vid_hdr->data_size = vid_hdr->used_ebs =
323 vid_hdr->data_pad = cpu_to_be32(0);
324 vid_hdr->lnum = cpu_to_be32(copy);
325 vid_hdr->sqnum = cpu_to_be64(++ai->max_sqnum);
327 /* The EC header is already there, write the VID header */
328 err = ubi_io_write_vid_hdr(ubi, new_aeb->pnum, vid_hdr);
332 /* Write the layout volume contents */
333 err = ubi_io_write_data(ubi, vtbl, new_aeb->pnum, 0, ubi->vtbl_size);
338 * And add it to the attaching information. Don't delete the old version
339 * of this LEB as it will be deleted and freed in 'ubi_add_to_av()'.
341 err = ubi_add_to_av(ubi, ai, new_aeb->pnum, new_aeb->ec, vid_hdr, 0);
342 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
343 ubi_free_vid_hdr(ubi, vid_hdr);
347 if (err == -EIO && ++tries <= 5) {
349 * Probably this physical eraseblock went bad, try to pick
352 list_add(&new_aeb->u.list, &ai->erase);
355 kmem_cache_free(ai->aeb_slab_cache, new_aeb);
357 ubi_free_vid_hdr(ubi, vid_hdr);
363 * process_lvol - process the layout volume.
364 * @ubi: UBI device description object
365 * @ai: attaching information
366 * @av: layout volume attaching information
368 * This function is responsible for reading the layout volume, ensuring it is
369 * not corrupted, and recovering from corruptions if needed. Returns volume
370 * table in case of success and a negative error code in case of failure.
372 static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
373 struct ubi_attach_info *ai,
374 struct ubi_ainf_volume *av)
378 struct ubi_ainf_peb *aeb;
379 struct ubi_vtbl_record *leb[UBI_LAYOUT_VOLUME_EBS] = { NULL, NULL };
380 int leb_corrupted[UBI_LAYOUT_VOLUME_EBS] = {1, 1};
383 * UBI goes through the following steps when it changes the layout
386 * b. write new data to LEB 0;
388 * d. write new data to LEB 1.
390 * Before the change, both LEBs contain the same data.
392 * Due to unclean reboots, the contents of LEB 0 may be lost, but there
393 * should LEB 1. So it is OK if LEB 0 is corrupted while LEB 1 is not.
394 * Similarly, LEB 1 may be lost, but there should be LEB 0. And
395 * finally, unclean reboots may result in a situation when neither LEB
396 * 0 nor LEB 1 are corrupted, but they are different. In this case, LEB
397 * 0 contains more recent information.
399 * So the plan is to first check LEB 0. Then
400 * a. if LEB 0 is OK, it must be containing the most recent data; then
401 * we compare it with LEB 1, and if they are different, we copy LEB
403 * b. if LEB 0 is corrupted, but LEB 1 has to be OK, and we copy LEB 1
407 dbg_gen("check layout volume");
409 /* Read both LEB 0 and LEB 1 into memory */
410 ubi_rb_for_each_entry(rb, aeb, &av->root, u.rb) {
411 leb[aeb->lnum] = vzalloc(ubi->vtbl_size);
412 if (!leb[aeb->lnum]) {
417 err = ubi_io_read_data(ubi, leb[aeb->lnum], aeb->pnum, 0,
419 if (err == UBI_IO_BITFLIPS || mtd_is_eccerr(err))
421 * Scrub the PEB later. Note, -EBADMSG indicates an
422 * uncorrectable ECC error, but we have our own CRC and
423 * the data will be checked later. If the data is OK,
424 * the PEB will be scrubbed (because we set
425 * aeb->scrub). If the data is not OK, the contents of
426 * the PEB will be recovered from the second copy, and
427 * aeb->scrub will be cleared in
437 leb_corrupted[0] = vtbl_check(ubi, leb[0]);
438 if (leb_corrupted[0] < 0)
442 if (!leb_corrupted[0]) {
445 leb_corrupted[1] = memcmp(leb[0], leb[1],
447 if (leb_corrupted[1]) {
448 ubi_warn("volume table copy #2 is corrupted");
449 err = create_vtbl(ubi, ai, 1, leb[0]);
452 ubi_msg("volume table was restored");
455 /* Both LEB 1 and LEB 2 are OK and consistent */
459 /* LEB 0 is corrupted or does not exist */
461 leb_corrupted[1] = vtbl_check(ubi, leb[1]);
462 if (leb_corrupted[1] < 0)
465 if (leb_corrupted[1]) {
466 /* Both LEB 0 and LEB 1 are corrupted */
467 ubi_err("both volume tables are corrupted");
471 ubi_warn("volume table copy #1 is corrupted");
472 err = create_vtbl(ubi, ai, 0, leb[1]);
475 ubi_msg("volume table was restored");
488 * create_empty_lvol - create empty layout volume.
489 * @ubi: UBI device description object
490 * @ai: attaching information
492 * This function returns volume table contents in case of success and a
493 * negative error code in case of failure.
495 static struct ubi_vtbl_record *create_empty_lvol(struct ubi_device *ubi,
496 struct ubi_attach_info *ai)
499 struct ubi_vtbl_record *vtbl;
501 vtbl = vzalloc(ubi->vtbl_size);
503 return ERR_PTR(-ENOMEM);
505 for (i = 0; i < ubi->vtbl_slots; i++)
506 memcpy(&vtbl[i], &empty_vtbl_record, UBI_VTBL_RECORD_SIZE);
508 for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
511 err = create_vtbl(ubi, ai, i, vtbl);
522 * init_volumes - initialize volume information for existing volumes.
523 * @ubi: UBI device description object
524 * @ai: scanning information
525 * @vtbl: volume table
527 * This function allocates volume description objects for existing volumes.
528 * Returns zero in case of success and a negative error code in case of
531 static int init_volumes(struct ubi_device *ubi,
532 const struct ubi_attach_info *ai,
533 const struct ubi_vtbl_record *vtbl)
535 int i, reserved_pebs = 0;
536 struct ubi_ainf_volume *av;
537 struct ubi_volume *vol;
539 for (i = 0; i < ubi->vtbl_slots; i++) {
542 if (be32_to_cpu(vtbl[i].reserved_pebs) == 0)
543 continue; /* Empty record */
545 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
549 vol->reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs);
550 vol->alignment = be32_to_cpu(vtbl[i].alignment);
551 vol->data_pad = be32_to_cpu(vtbl[i].data_pad);
552 vol->upd_marker = vtbl[i].upd_marker;
553 vol->vol_type = vtbl[i].vol_type == UBI_VID_DYNAMIC ?
554 UBI_DYNAMIC_VOLUME : UBI_STATIC_VOLUME;
555 vol->name_len = be16_to_cpu(vtbl[i].name_len);
556 vol->usable_leb_size = ubi->leb_size - vol->data_pad;
557 memcpy(vol->name, vtbl[i].name, vol->name_len);
558 vol->name[vol->name_len] = '\0';
561 if (vtbl[i].flags & UBI_VTBL_AUTORESIZE_FLG) {
562 /* Auto re-size flag may be set only for one volume */
563 if (ubi->autoresize_vol_id != -1) {
564 ubi_err("more than one auto-resize volume (%d and %d)",
565 ubi->autoresize_vol_id, i);
570 ubi->autoresize_vol_id = i;
573 ubi_assert(!ubi->volumes[i]);
574 ubi->volumes[i] = vol;
577 reserved_pebs += vol->reserved_pebs;
580 * In case of dynamic volume UBI knows nothing about how many
581 * data is stored there. So assume the whole volume is used.
583 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
584 vol->used_ebs = vol->reserved_pebs;
585 vol->last_eb_bytes = vol->usable_leb_size;
587 (long long)vol->used_ebs * vol->usable_leb_size;
591 /* Static volumes only */
592 av = ubi_find_av(ai, i);
595 * No eraseblocks belonging to this volume found. We
596 * don't actually know whether this static volume is
597 * completely corrupted or just contains no data. And
598 * we cannot know this as long as data size is not
599 * stored on flash. So we just assume the volume is
600 * empty. FIXME: this should be handled.
605 if (av->leb_count != av->used_ebs) {
607 * We found a static volume which misses several
608 * eraseblocks. Treat it as corrupted.
610 ubi_warn("static volume %d misses %d LEBs - corrupted",
611 av->vol_id, av->used_ebs - av->leb_count);
616 vol->used_ebs = av->used_ebs;
618 (long long)(vol->used_ebs - 1) * vol->usable_leb_size;
619 vol->used_bytes += av->last_data_size;
620 vol->last_eb_bytes = av->last_data_size;
623 /* And add the layout volume */
624 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
628 vol->reserved_pebs = UBI_LAYOUT_VOLUME_EBS;
629 vol->alignment = UBI_LAYOUT_VOLUME_ALIGN;
630 vol->vol_type = UBI_DYNAMIC_VOLUME;
631 vol->name_len = sizeof(UBI_LAYOUT_VOLUME_NAME) - 1;
632 memcpy(vol->name, UBI_LAYOUT_VOLUME_NAME, vol->name_len + 1);
633 vol->usable_leb_size = ubi->leb_size;
634 vol->used_ebs = vol->reserved_pebs;
635 vol->last_eb_bytes = vol->reserved_pebs;
637 (long long)vol->used_ebs * (ubi->leb_size - vol->data_pad);
638 vol->vol_id = UBI_LAYOUT_VOLUME_ID;
641 ubi_assert(!ubi->volumes[i]);
642 ubi->volumes[vol_id2idx(ubi, vol->vol_id)] = vol;
643 reserved_pebs += vol->reserved_pebs;
647 if (reserved_pebs > ubi->avail_pebs) {
648 ubi_err("not enough PEBs, required %d, available %d",
649 reserved_pebs, ubi->avail_pebs);
650 if (ubi->corr_peb_count)
651 ubi_err("%d PEBs are corrupted and not used",
652 ubi->corr_peb_count);
654 ubi->rsvd_pebs += reserved_pebs;
655 ubi->avail_pebs -= reserved_pebs;
661 * check_av - check volume attaching information.
662 * @vol: UBI volume description object
663 * @av: volume attaching information
665 * This function returns zero if the volume attaching information is consistent
666 * to the data read from the volume tabla, and %-EINVAL if not.
668 static int check_av(const struct ubi_volume *vol,
669 const struct ubi_ainf_volume *av)
673 if (av->highest_lnum >= vol->reserved_pebs) {
677 if (av->leb_count > vol->reserved_pebs) {
681 if (av->vol_type != vol->vol_type) {
685 if (av->used_ebs > vol->reserved_pebs) {
689 if (av->data_pad != vol->data_pad) {
696 ubi_err("bad attaching information, error %d", err);
698 ubi_dump_vol_info(vol);
703 * check_attaching_info - check that attaching information.
704 * @ubi: UBI device description object
705 * @ai: attaching information
707 * Even though we protect on-flash data by CRC checksums, we still don't trust
708 * the media. This function ensures that attaching information is consistent to
709 * the information read from the volume table. Returns zero if the attaching
710 * information is OK and %-EINVAL if it is not.
712 static int check_attaching_info(const struct ubi_device *ubi,
713 struct ubi_attach_info *ai)
716 struct ubi_ainf_volume *av;
717 struct ubi_volume *vol;
719 if (ai->vols_found > UBI_INT_VOL_COUNT + ubi->vtbl_slots) {
720 ubi_err("found %d volumes while attaching, maximum is %d + %d",
721 ai->vols_found, UBI_INT_VOL_COUNT, ubi->vtbl_slots);
725 if (ai->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT &&
726 ai->highest_vol_id < UBI_INTERNAL_VOL_START) {
727 ubi_err("too large volume ID %d found", ai->highest_vol_id);
731 for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
734 av = ubi_find_av(ai, i);
735 vol = ubi->volumes[i];
738 ubi_remove_av(ai, av);
742 if (vol->reserved_pebs == 0) {
743 ubi_assert(i < ubi->vtbl_slots);
749 * During attaching we found a volume which does not
750 * exist according to the information in the volume
751 * table. This must have happened due to an unclean
752 * reboot while the volume was being removed. Discard
755 ubi_msg("finish volume %d removal", av->vol_id);
756 ubi_remove_av(ai, av);
758 err = check_av(vol, av);
768 * ubi_read_volume_table - read the volume table.
769 * @ubi: UBI device description object
770 * @ai: attaching information
772 * This function reads volume table, checks it, recover from errors if needed,
773 * or creates it if needed. Returns zero in case of success and a negative
774 * error code in case of failure.
776 int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_attach_info *ai)
779 struct ubi_ainf_volume *av;
781 empty_vtbl_record.crc = cpu_to_be32(0xf116c36b);
784 * The number of supported volumes is limited by the eraseblock size
785 * and by the UBI_MAX_VOLUMES constant.
787 ubi->vtbl_slots = ubi->leb_size / UBI_VTBL_RECORD_SIZE;
788 if (ubi->vtbl_slots > UBI_MAX_VOLUMES)
789 ubi->vtbl_slots = UBI_MAX_VOLUMES;
791 ubi->vtbl_size = ubi->vtbl_slots * UBI_VTBL_RECORD_SIZE;
792 ubi->vtbl_size = ALIGN(ubi->vtbl_size, ubi->min_io_size);
794 av = ubi_find_av(ai, UBI_LAYOUT_VOLUME_ID);
797 * No logical eraseblocks belonging to the layout volume were
798 * found. This could mean that the flash is just empty. In
799 * this case we create empty layout volume.
801 * But if flash is not empty this must be a corruption or the
802 * MTD device just contains garbage.
805 ubi->vtbl = create_empty_lvol(ubi, ai);
806 if (IS_ERR(ubi->vtbl))
807 return PTR_ERR(ubi->vtbl);
809 ubi_err("the layout volume was not found");
813 if (av->leb_count > UBI_LAYOUT_VOLUME_EBS) {
814 /* This must not happen with proper UBI images */
815 ubi_err("too many LEBs (%d) in layout volume",
820 ubi->vtbl = process_lvol(ubi, ai, av);
821 if (IS_ERR(ubi->vtbl))
822 return PTR_ERR(ubi->vtbl);
825 ubi->avail_pebs = ubi->good_peb_count - ubi->corr_peb_count;
828 * The layout volume is OK, initialize the corresponding in-RAM data
831 err = init_volumes(ubi, ai, ubi->vtbl);
836 * Make sure that the attaching information is consistent to the
837 * information stored in the volume table.
839 err = check_attaching_info(ubi, ai);
847 for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
848 kfree(ubi->volumes[i]);
849 ubi->volumes[i] = NULL;
855 * self_vtbl_check - check volume table.
856 * @ubi: UBI device description object
858 static void self_vtbl_check(const struct ubi_device *ubi)
860 if (!ubi_dbg_chk_gen(ubi))
863 if (vtbl_check(ubi, ubi->vtbl)) {
864 ubi_err("self-check failed");