2 * Copyright (c) International Business Machines Corp., 2006
3 * Copyright (c) Nokia Corporation, 2006, 2007
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 * Author: Artem Bityutskiy (Битюцкий Артём)
23 * This file includes volume table manipulation code. The volume table is an
24 * on-flash table containing volume meta-data like name, number of reserved
25 * physical eraseblocks, type, etc. The volume table is stored in the so-called
28 * The layout volume is an internal volume which is organized as follows. It
29 * consists of two logical eraseblocks - LEB 0 and LEB 1. Each logical
30 * eraseblock stores one volume table copy, i.e. LEB 0 and LEB 1 duplicate each
31 * other. This redundancy guarantees robustness to unclean reboots. The volume
32 * table is basically an array of volume table records. Each record contains
33 * full information about the volume and protected by a CRC checksum.
35 * The volume table is changed, it is first changed in RAM. Then LEB 0 is
36 * erased, and the updated volume table is written back to LEB 0. Then same for
37 * LEB 1. This scheme guarantees recoverability from unclean reboots.
39 * In this UBI implementation the on-flash volume table does not contain any
40 * information about how many data static volumes contain. This information may
41 * be found from the scanning data.
43 * But it would still be beneficial to store this information in the volume
44 * table. For example, suppose we have a static volume X, and all its physical
45 * eraseblocks became bad for some reasons. Suppose we are attaching the
46 * corresponding MTD device, the scanning has found no logical eraseblocks
47 * corresponding to the volume X. According to the volume table volume X does
48 * exist. So we don't know whether it is just empty or all its physical
49 * eraseblocks went bad. So we cannot alarm the user about this corruption.
51 * The volume table also stores so-called "update marker", which is used for
52 * volume updates. Before updating the volume, the update marker is set, and
53 * after the update operation is finished, the update marker is cleared. So if
54 * the update operation was interrupted (e.g. by an unclean reboot) - the
55 * update marker is still there and we know that the volume's contents is
59 #include <linux/crc32.h>
60 #include <linux/err.h>
61 #include <linux/slab.h>
62 #include <asm/div64.h>
65 static void self_vtbl_check(const struct ubi_device *ubi);
67 /* Empty volume table record */
68 static struct ubi_vtbl_record empty_vtbl_record;
71 * ubi_change_vtbl_record - change volume table record.
72 * @ubi: UBI device description object
73 * @idx: table index to change
74 * @vtbl_rec: new volume table record
76 * This function changes volume table record @idx. If @vtbl_rec is %NULL, empty
77 * volume table record is written. The caller does not have to calculate CRC of
78 * the record as it is done by this function. Returns zero in case of success
79 * and a negative error code in case of failure.
81 int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
82 struct ubi_vtbl_record *vtbl_rec)
86 struct ubi_volume *layout_vol;
88 ubi_assert(idx >= 0 && idx < ubi->vtbl_slots);
89 layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)];
92 vtbl_rec = &empty_vtbl_record;
94 crc = crc32(UBI_CRC32_INIT, vtbl_rec, UBI_VTBL_RECORD_SIZE_CRC);
95 vtbl_rec->crc = cpu_to_be32(crc);
98 memcpy(&ubi->vtbl[idx], vtbl_rec, sizeof(struct ubi_vtbl_record));
99 for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
100 err = ubi_eba_unmap_leb(ubi, layout_vol, i);
104 err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
110 self_vtbl_check(ubi);
115 * ubi_vtbl_rename_volumes - rename UBI volumes in the volume table.
116 * @ubi: UBI device description object
117 * @rename_list: list of &struct ubi_rename_entry objects
119 * This function re-names multiple volumes specified in @req in the volume
120 * table. Returns zero in case of success and a negative error code in case of
123 int ubi_vtbl_rename_volumes(struct ubi_device *ubi,
124 struct list_head *rename_list)
127 struct ubi_rename_entry *re;
128 struct ubi_volume *layout_vol;
130 list_for_each_entry(re, rename_list, list) {
132 struct ubi_volume *vol = re->desc->vol;
133 struct ubi_vtbl_record *vtbl_rec = &ubi->vtbl[vol->vol_id];
136 memcpy(vtbl_rec, &empty_vtbl_record,
137 sizeof(struct ubi_vtbl_record));
141 vtbl_rec->name_len = cpu_to_be16(re->new_name_len);
142 memcpy(vtbl_rec->name, re->new_name, re->new_name_len);
143 memset(vtbl_rec->name + re->new_name_len, 0,
144 UBI_VOL_NAME_MAX + 1 - re->new_name_len);
145 crc = crc32(UBI_CRC32_INIT, vtbl_rec,
146 UBI_VTBL_RECORD_SIZE_CRC);
147 vtbl_rec->crc = cpu_to_be32(crc);
150 layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)];
151 for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
152 err = ubi_eba_unmap_leb(ubi, layout_vol, i);
156 err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
166 * vtbl_check - check if volume table is not corrupted and sensible.
167 * @ubi: UBI device description object
168 * @vtbl: volume table
170 * This function returns zero if @vtbl is all right, %1 if CRC is incorrect,
171 * and %-EINVAL if it contains inconsistent data.
173 static int vtbl_check(const struct ubi_device *ubi,
174 const struct ubi_vtbl_record *vtbl)
176 int i, n, reserved_pebs, alignment, data_pad, vol_type, name_len;
181 for (i = 0; i < ubi->vtbl_slots; i++) {
184 reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs);
185 alignment = be32_to_cpu(vtbl[i].alignment);
186 data_pad = be32_to_cpu(vtbl[i].data_pad);
187 upd_marker = vtbl[i].upd_marker;
188 vol_type = vtbl[i].vol_type;
189 name_len = be16_to_cpu(vtbl[i].name_len);
190 name = &vtbl[i].name[0];
192 crc = crc32(UBI_CRC32_INIT, &vtbl[i], UBI_VTBL_RECORD_SIZE_CRC);
193 if (be32_to_cpu(vtbl[i].crc) != crc) {
194 ubi_err("bad CRC at record %u: %#08x, not %#08x",
195 i, crc, be32_to_cpu(vtbl[i].crc));
196 ubi_dump_vtbl_record(&vtbl[i], i);
200 if (reserved_pebs == 0) {
201 if (memcmp(&vtbl[i], &empty_vtbl_record,
202 UBI_VTBL_RECORD_SIZE)) {
209 if (reserved_pebs < 0 || alignment < 0 || data_pad < 0 ||
215 if (alignment > ubi->leb_size || alignment == 0) {
220 n = alignment & (ubi->min_io_size - 1);
221 if (alignment != 1 && n) {
226 n = ubi->leb_size % alignment;
228 ubi_err("bad data_pad, has to be %d", n);
233 if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
238 if (upd_marker != 0 && upd_marker != 1) {
243 if (reserved_pebs > ubi->good_peb_count) {
244 ubi_err("too large reserved_pebs %d, good PEBs %d",
245 reserved_pebs, ubi->good_peb_count);
250 if (name_len > UBI_VOL_NAME_MAX) {
255 if (name[0] == '\0') {
260 if (name_len != strnlen(name, name_len + 1)) {
266 /* Checks that all names are unique */
267 for (i = 0; i < ubi->vtbl_slots - 1; i++) {
268 for (n = i + 1; n < ubi->vtbl_slots; n++) {
269 int len1 = be16_to_cpu(vtbl[i].name_len);
270 int len2 = be16_to_cpu(vtbl[n].name_len);
272 if (len1 > 0 && len1 == len2 &&
273 !strncmp(vtbl[i].name, vtbl[n].name, len1)) {
274 ubi_err("volumes %d and %d have the same name"
275 " \"%s\"", i, n, vtbl[i].name);
276 ubi_dump_vtbl_record(&vtbl[i], i);
277 ubi_dump_vtbl_record(&vtbl[n], n);
286 ubi_err("volume table check failed: record %d, error %d", i, err);
287 ubi_dump_vtbl_record(&vtbl[i], i);
292 * create_vtbl - create a copy of volume table.
293 * @ubi: UBI device description object
294 * @ai: attaching information
295 * @copy: number of the volume table copy
296 * @vtbl: contents of the volume table
298 * This function returns zero in case of success and a negative error code in
301 static int create_vtbl(struct ubi_device *ubi, struct ubi_attach_info *ai,
302 int copy, void *vtbl)
305 struct ubi_vid_hdr *vid_hdr;
306 struct ubi_ainf_peb *new_aeb;
308 ubi_msg("create volume table (copy #%d)", copy + 1);
310 vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
315 new_aeb = ubi_scan_get_free_peb(ubi, ai);
316 if (IS_ERR(new_aeb)) {
317 err = PTR_ERR(new_aeb);
321 vid_hdr->vol_type = UBI_LAYOUT_VOLUME_TYPE;
322 vid_hdr->vol_id = cpu_to_be32(UBI_LAYOUT_VOLUME_ID);
323 vid_hdr->compat = UBI_LAYOUT_VOLUME_COMPAT;
324 vid_hdr->data_size = vid_hdr->used_ebs =
325 vid_hdr->data_pad = cpu_to_be32(0);
326 vid_hdr->lnum = cpu_to_be32(copy);
327 vid_hdr->sqnum = cpu_to_be64(++ai->max_sqnum);
329 /* The EC header is already there, write the VID header */
330 err = ubi_io_write_vid_hdr(ubi, new_aeb->pnum, vid_hdr);
334 /* Write the layout volume contents */
335 err = ubi_io_write_data(ubi, vtbl, new_aeb->pnum, 0, ubi->vtbl_size);
340 * And add it to the attaching information. Don't delete the old version
341 * of this LEB as it will be deleted and freed in 'ubi_scan_add_used()'.
343 err = ubi_scan_add_used(ubi, ai, new_aeb->pnum, new_aeb->ec,
346 ubi_free_vid_hdr(ubi, vid_hdr);
350 if (err == -EIO && ++tries <= 5) {
352 * Probably this physical eraseblock went bad, try to pick
355 list_add(&new_aeb->u.list, &ai->erase);
360 ubi_free_vid_hdr(ubi, vid_hdr);
366 * process_lvol - process the layout volume.
367 * @ubi: UBI device description object
368 * @ai: attaching information
369 * @sv: layout volume attaching information
371 * This function is responsible for reading the layout volume, ensuring it is
372 * not corrupted, and recovering from corruptions if needed. Returns volume
373 * table in case of success and a negative error code in case of failure.
375 static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
376 struct ubi_attach_info *ai,
377 struct ubi_ainf_volume *sv)
381 struct ubi_ainf_peb *aeb;
382 struct ubi_vtbl_record *leb[UBI_LAYOUT_VOLUME_EBS] = { NULL, NULL };
383 int leb_corrupted[UBI_LAYOUT_VOLUME_EBS] = {1, 1};
386 * UBI goes through the following steps when it changes the layout
389 * b. write new data to LEB 0;
391 * d. write new data to LEB 1.
393 * Before the change, both LEBs contain the same data.
395 * Due to unclean reboots, the contents of LEB 0 may be lost, but there
396 * should LEB 1. So it is OK if LEB 0 is corrupted while LEB 1 is not.
397 * Similarly, LEB 1 may be lost, but there should be LEB 0. And
398 * finally, unclean reboots may result in a situation when neither LEB
399 * 0 nor LEB 1 are corrupted, but they are different. In this case, LEB
400 * 0 contains more recent information.
402 * So the plan is to first check LEB 0. Then
403 * a. if LEB 0 is OK, it must be containing the most recent data; then
404 * we compare it with LEB 1, and if they are different, we copy LEB
406 * b. if LEB 0 is corrupted, but LEB 1 has to be OK, and we copy LEB 1
410 dbg_gen("check layout volume");
412 /* Read both LEB 0 and LEB 1 into memory */
413 ubi_rb_for_each_entry(rb, aeb, &sv->root, u.rb) {
414 leb[aeb->lnum] = vzalloc(ubi->vtbl_size);
415 if (!leb[aeb->lnum]) {
420 err = ubi_io_read_data(ubi, leb[aeb->lnum], aeb->pnum, 0,
422 if (err == UBI_IO_BITFLIPS || mtd_is_eccerr(err))
424 * Scrub the PEB later. Note, -EBADMSG indicates an
425 * uncorrectable ECC error, but we have our own CRC and
426 * the data will be checked later. If the data is OK,
427 * the PEB will be scrubbed (because we set
428 * aeb->scrub). If the data is not OK, the contents of
429 * the PEB will be recovered from the second copy, and
430 * aeb->scrub will be cleared in
431 * 'ubi_scan_add_used()'.
440 leb_corrupted[0] = vtbl_check(ubi, leb[0]);
441 if (leb_corrupted[0] < 0)
445 if (!leb_corrupted[0]) {
448 leb_corrupted[1] = memcmp(leb[0], leb[1],
450 if (leb_corrupted[1]) {
451 ubi_warn("volume table copy #2 is corrupted");
452 err = create_vtbl(ubi, ai, 1, leb[0]);
455 ubi_msg("volume table was restored");
458 /* Both LEB 1 and LEB 2 are OK and consistent */
462 /* LEB 0 is corrupted or does not exist */
464 leb_corrupted[1] = vtbl_check(ubi, leb[1]);
465 if (leb_corrupted[1] < 0)
468 if (leb_corrupted[1]) {
469 /* Both LEB 0 and LEB 1 are corrupted */
470 ubi_err("both volume tables are corrupted");
474 ubi_warn("volume table copy #1 is corrupted");
475 err = create_vtbl(ubi, ai, 0, leb[1]);
478 ubi_msg("volume table was restored");
491 * create_empty_lvol - create empty layout volume.
492 * @ubi: UBI device description object
493 * @ai: attaching information
495 * This function returns volume table contents in case of success and a
496 * negative error code in case of failure.
498 static struct ubi_vtbl_record *create_empty_lvol(struct ubi_device *ubi,
499 struct ubi_attach_info *ai)
502 struct ubi_vtbl_record *vtbl;
504 vtbl = vzalloc(ubi->vtbl_size);
506 return ERR_PTR(-ENOMEM);
508 for (i = 0; i < ubi->vtbl_slots; i++)
509 memcpy(&vtbl[i], &empty_vtbl_record, UBI_VTBL_RECORD_SIZE);
511 for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
514 err = create_vtbl(ubi, ai, i, vtbl);
525 * init_volumes - initialize volume information for existing volumes.
526 * @ubi: UBI device description object
527 * @ai: scanning information
528 * @vtbl: volume table
530 * This function allocates volume description objects for existing volumes.
531 * Returns zero in case of success and a negative error code in case of
534 static int init_volumes(struct ubi_device *ubi,
535 const struct ubi_attach_info *ai,
536 const struct ubi_vtbl_record *vtbl)
538 int i, reserved_pebs = 0;
539 struct ubi_ainf_volume *sv;
540 struct ubi_volume *vol;
542 for (i = 0; i < ubi->vtbl_slots; i++) {
545 if (be32_to_cpu(vtbl[i].reserved_pebs) == 0)
546 continue; /* Empty record */
548 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
552 vol->reserved_pebs = be32_to_cpu(vtbl[i].reserved_pebs);
553 vol->alignment = be32_to_cpu(vtbl[i].alignment);
554 vol->data_pad = be32_to_cpu(vtbl[i].data_pad);
555 vol->upd_marker = vtbl[i].upd_marker;
556 vol->vol_type = vtbl[i].vol_type == UBI_VID_DYNAMIC ?
557 UBI_DYNAMIC_VOLUME : UBI_STATIC_VOLUME;
558 vol->name_len = be16_to_cpu(vtbl[i].name_len);
559 vol->usable_leb_size = ubi->leb_size - vol->data_pad;
560 memcpy(vol->name, vtbl[i].name, vol->name_len);
561 vol->name[vol->name_len] = '\0';
564 if (vtbl[i].flags & UBI_VTBL_AUTORESIZE_FLG) {
565 /* Auto re-size flag may be set only for one volume */
566 if (ubi->autoresize_vol_id != -1) {
567 ubi_err("more than one auto-resize volume (%d "
568 "and %d)", ubi->autoresize_vol_id, i);
573 ubi->autoresize_vol_id = i;
576 ubi_assert(!ubi->volumes[i]);
577 ubi->volumes[i] = vol;
580 reserved_pebs += vol->reserved_pebs;
583 * In case of dynamic volume UBI knows nothing about how many
584 * data is stored there. So assume the whole volume is used.
586 if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
587 vol->used_ebs = vol->reserved_pebs;
588 vol->last_eb_bytes = vol->usable_leb_size;
590 (long long)vol->used_ebs * vol->usable_leb_size;
594 /* Static volumes only */
595 sv = ubi_scan_find_sv(ai, i);
598 * No eraseblocks belonging to this volume found. We
599 * don't actually know whether this static volume is
600 * completely corrupted or just contains no data. And
601 * we cannot know this as long as data size is not
602 * stored on flash. So we just assume the volume is
603 * empty. FIXME: this should be handled.
608 if (sv->leb_count != sv->used_ebs) {
610 * We found a static volume which misses several
611 * eraseblocks. Treat it as corrupted.
613 ubi_warn("static volume %d misses %d LEBs - corrupted",
614 sv->vol_id, sv->used_ebs - sv->leb_count);
619 vol->used_ebs = sv->used_ebs;
621 (long long)(vol->used_ebs - 1) * vol->usable_leb_size;
622 vol->used_bytes += sv->last_data_size;
623 vol->last_eb_bytes = sv->last_data_size;
626 /* And add the layout volume */
627 vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
631 vol->reserved_pebs = UBI_LAYOUT_VOLUME_EBS;
632 vol->alignment = UBI_LAYOUT_VOLUME_ALIGN;
633 vol->vol_type = UBI_DYNAMIC_VOLUME;
634 vol->name_len = sizeof(UBI_LAYOUT_VOLUME_NAME) - 1;
635 memcpy(vol->name, UBI_LAYOUT_VOLUME_NAME, vol->name_len + 1);
636 vol->usable_leb_size = ubi->leb_size;
637 vol->used_ebs = vol->reserved_pebs;
638 vol->last_eb_bytes = vol->reserved_pebs;
640 (long long)vol->used_ebs * (ubi->leb_size - vol->data_pad);
641 vol->vol_id = UBI_LAYOUT_VOLUME_ID;
644 ubi_assert(!ubi->volumes[i]);
645 ubi->volumes[vol_id2idx(ubi, vol->vol_id)] = vol;
646 reserved_pebs += vol->reserved_pebs;
650 if (reserved_pebs > ubi->avail_pebs) {
651 ubi_err("not enough PEBs, required %d, available %d",
652 reserved_pebs, ubi->avail_pebs);
653 if (ubi->corr_peb_count)
654 ubi_err("%d PEBs are corrupted and not used",
655 ubi->corr_peb_count);
657 ubi->rsvd_pebs += reserved_pebs;
658 ubi->avail_pebs -= reserved_pebs;
664 * check_sv - check volume attaching information.
665 * @vol: UBI volume description object
666 * @sv: volume attaching information
668 * This function returns zero if the volume attaching information is consistent
669 * to the data read from the volume tabla, and %-EINVAL if not.
671 static int check_sv(const struct ubi_volume *vol,
672 const struct ubi_ainf_volume *sv)
676 if (sv->highest_lnum >= vol->reserved_pebs) {
680 if (sv->leb_count > vol->reserved_pebs) {
684 if (sv->vol_type != vol->vol_type) {
688 if (sv->used_ebs > vol->reserved_pebs) {
692 if (sv->data_pad != vol->data_pad) {
699 ubi_err("bad attaching information, error %d", err);
701 ubi_dump_vol_info(vol);
706 * check_scanning_info - check that attaching information.
707 * @ubi: UBI device description object
708 * @ai: attaching information
710 * Even though we protect on-flash data by CRC checksums, we still don't trust
711 * the media. This function ensures that attaching information is consistent to
712 * the information read from the volume table. Returns zero if the scanning
713 * information is OK and %-EINVAL if it is not.
715 static int check_scanning_info(const struct ubi_device *ubi,
716 struct ubi_attach_info *ai)
719 struct ubi_ainf_volume *sv;
720 struct ubi_volume *vol;
722 if (ai->vols_found > UBI_INT_VOL_COUNT + ubi->vtbl_slots) {
723 ubi_err("scanning found %d volumes, maximum is %d + %d",
724 ai->vols_found, UBI_INT_VOL_COUNT, ubi->vtbl_slots);
728 if (ai->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT &&
729 ai->highest_vol_id < UBI_INTERNAL_VOL_START) {
730 ubi_err("too large volume ID %d found by scanning",
735 for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
738 sv = ubi_scan_find_sv(ai, i);
739 vol = ubi->volumes[i];
742 ubi_scan_rm_volume(ai, sv);
746 if (vol->reserved_pebs == 0) {
747 ubi_assert(i < ubi->vtbl_slots);
753 * During scanning we found a volume which does not
754 * exist according to the information in the volume
755 * table. This must have happened due to an unclean
756 * reboot while the volume was being removed. Discard
759 ubi_msg("finish volume %d removal", sv->vol_id);
760 ubi_scan_rm_volume(ai, sv);
762 err = check_sv(vol, sv);
772 * ubi_read_volume_table - read the volume table.
773 * @ubi: UBI device description object
774 * @ai: attaching information
776 * This function reads volume table, checks it, recover from errors if needed,
777 * or creates it if needed. Returns zero in case of success and a negative
778 * error code in case of failure.
780 int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_attach_info *ai)
783 struct ubi_ainf_volume *sv;
785 empty_vtbl_record.crc = cpu_to_be32(0xf116c36b);
788 * The number of supported volumes is limited by the eraseblock size
789 * and by the UBI_MAX_VOLUMES constant.
791 ubi->vtbl_slots = ubi->leb_size / UBI_VTBL_RECORD_SIZE;
792 if (ubi->vtbl_slots > UBI_MAX_VOLUMES)
793 ubi->vtbl_slots = UBI_MAX_VOLUMES;
795 ubi->vtbl_size = ubi->vtbl_slots * UBI_VTBL_RECORD_SIZE;
796 ubi->vtbl_size = ALIGN(ubi->vtbl_size, ubi->min_io_size);
798 sv = ubi_scan_find_sv(ai, UBI_LAYOUT_VOLUME_ID);
801 * No logical eraseblocks belonging to the layout volume were
802 * found. This could mean that the flash is just empty. In
803 * this case we create empty layout volume.
805 * But if flash is not empty this must be a corruption or the
806 * MTD device just contains garbage.
809 ubi->vtbl = create_empty_lvol(ubi, ai);
810 if (IS_ERR(ubi->vtbl))
811 return PTR_ERR(ubi->vtbl);
813 ubi_err("the layout volume was not found");
817 if (sv->leb_count > UBI_LAYOUT_VOLUME_EBS) {
818 /* This must not happen with proper UBI images */
819 ubi_err("too many LEBs (%d) in layout volume",
824 ubi->vtbl = process_lvol(ubi, ai, sv);
825 if (IS_ERR(ubi->vtbl))
826 return PTR_ERR(ubi->vtbl);
829 ubi->avail_pebs = ubi->good_peb_count - ubi->corr_peb_count;
832 * The layout volume is OK, initialize the corresponding in-RAM data
835 err = init_volumes(ubi, ai, ubi->vtbl);
840 * Make sure that the attaching information is consistent to the
841 * information stored in the volume table.
843 err = check_scanning_info(ubi, ai);
851 for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
852 kfree(ubi->volumes[i]);
853 ubi->volumes[i] = NULL;
859 * self_vtbl_check - check volume table.
860 * @ubi: UBI device description object
862 static void self_vtbl_check(const struct ubi_device *ubi)
864 if (!ubi->dbg->chk_gen)
867 if (vtbl_check(ubi, ubi->vtbl)) {
868 ubi_err("self-check failed");