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 many data static volumes contain. This information may
29 * be found from the scanning data.
31 * But it would still be beneficial to store this information in the volume
32 * table. For example, suppose we have a static volume X, and all its physical
33 * eraseblocks became bad for some reasons. Suppose we are attaching the
34 * corresponding MTD device, the scanning has found no logical eraseblocks
35 * corresponding to the volume X. According to the volume table volume X does
36 * exist. So we don't know whether it is just empty or all its physical
37 * eraseblocks went bad. So we cannot alarm the user about this corruption.
39 * The volume table also stores so-called "update marker", which is used for
40 * volume updates. Before updating the volume, the update marker is set, and
41 * after the update operation is finished, the update marker is cleared. So if
42 * the update operation was interrupted (e.g. by an unclean reboot) - the
43 * 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 <asm/div64.h>
53 #include <ubi_uboot.h>
56 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
57 static void paranoid_vtbl_check(const struct ubi_device
*ubi
);
59 #define paranoid_vtbl_check(ubi)
62 /* Empty volume table record */
63 static struct ubi_vtbl_record empty_vtbl_record
;
66 * ubi_change_vtbl_record - change volume table record.
67 * @ubi: UBI device description object
68 * @idx: table index to change
69 * @vtbl_rec: new volume table record
71 * This function changes volume table record @idx. If @vtbl_rec is %NULL, empty
72 * volume table record is written. The caller does not have to calculate CRC of
73 * the record as it is done by this function. Returns zero in case of success
74 * and a negative error code in case of failure.
76 int ubi_change_vtbl_record(struct ubi_device
*ubi
, int idx
,
77 struct ubi_vtbl_record
*vtbl_rec
)
81 struct ubi_volume
*layout_vol
;
83 ubi_assert(idx
>= 0 && idx
< ubi
->vtbl_slots
);
84 layout_vol
= ubi
->volumes
[vol_id2idx(ubi
, UBI_LAYOUT_VOLUME_ID
)];
87 vtbl_rec
= &empty_vtbl_record
;
89 crc
= crc32(UBI_CRC32_INIT
, vtbl_rec
, UBI_VTBL_RECORD_SIZE_CRC
);
90 vtbl_rec
->crc
= cpu_to_be32(crc
);
93 memcpy(&ubi
->vtbl
[idx
], vtbl_rec
, sizeof(struct ubi_vtbl_record
));
94 for (i
= 0; i
< UBI_LAYOUT_VOLUME_EBS
; i
++) {
95 err
= ubi_eba_unmap_leb(ubi
, layout_vol
, i
);
99 err
= ubi_eba_write_leb(ubi
, layout_vol
, i
, ubi
->vtbl
, 0,
100 ubi
->vtbl_size
, UBI_LONGTERM
);
105 paranoid_vtbl_check(ubi
);
110 * vtbl_check - check if volume table is not corrupted and contains sensible
112 * @ubi: UBI device description object
113 * @vtbl: volume table
115 * This function returns zero if @vtbl is all right, %1 if CRC is incorrect,
116 * and %-EINVAL if it contains inconsistent data.
118 static int vtbl_check(const struct ubi_device
*ubi
,
119 const struct ubi_vtbl_record
*vtbl
)
121 int i
, n
, reserved_pebs
, alignment
, data_pad
, vol_type
, name_len
;
126 for (i
= 0; i
< ubi
->vtbl_slots
; i
++) {
129 reserved_pebs
= be32_to_cpu(vtbl
[i
].reserved_pebs
);
130 alignment
= be32_to_cpu(vtbl
[i
].alignment
);
131 data_pad
= be32_to_cpu(vtbl
[i
].data_pad
);
132 upd_marker
= vtbl
[i
].upd_marker
;
133 vol_type
= vtbl
[i
].vol_type
;
134 name_len
= be16_to_cpu(vtbl
[i
].name_len
);
135 name
= (const char *) &vtbl
[i
].name
[0];
137 crc
= crc32(UBI_CRC32_INIT
, &vtbl
[i
], UBI_VTBL_RECORD_SIZE_CRC
);
138 if (be32_to_cpu(vtbl
[i
].crc
) != crc
) {
139 ubi_err("bad CRC at record %u: %#08x, not %#08x",
140 i
, crc
, be32_to_cpu(vtbl
[i
].crc
));
141 ubi_dbg_dump_vtbl_record(&vtbl
[i
], i
);
145 if (reserved_pebs
== 0) {
146 if (memcmp(&vtbl
[i
], &empty_vtbl_record
,
147 UBI_VTBL_RECORD_SIZE
)) {
154 if (reserved_pebs
< 0 || alignment
< 0 || data_pad
< 0 ||
160 if (alignment
> ubi
->leb_size
|| alignment
== 0) {
165 n
= alignment
& (ubi
->min_io_size
- 1);
166 if (alignment
!= 1 && n
) {
171 n
= ubi
->leb_size
% alignment
;
173 dbg_err("bad data_pad, has to be %d", n
);
178 if (vol_type
!= UBI_VID_DYNAMIC
&& vol_type
!= UBI_VID_STATIC
) {
183 if (upd_marker
!= 0 && upd_marker
!= 1) {
188 if (reserved_pebs
> ubi
->good_peb_count
) {
189 dbg_err("too large reserved_pebs, good PEBs %d",
190 ubi
->good_peb_count
);
195 if (name_len
> UBI_VOL_NAME_MAX
) {
200 if (name
[0] == '\0') {
205 if (name_len
!= strnlen(name
, name_len
+ 1)) {
211 /* Checks that all names are unique */
212 for (i
= 0; i
< ubi
->vtbl_slots
- 1; i
++) {
213 for (n
= i
+ 1; n
< ubi
->vtbl_slots
; n
++) {
214 int len1
= be16_to_cpu(vtbl
[i
].name_len
);
215 int len2
= be16_to_cpu(vtbl
[n
].name_len
);
217 if (len1
> 0 && len1
== len2
&&
218 !strncmp((char *)vtbl
[i
].name
, (char *)vtbl
[n
].name
, len1
)) {
219 ubi_err("volumes %d and %d have the same name"
220 " \"%s\"", i
, n
, vtbl
[i
].name
);
221 ubi_dbg_dump_vtbl_record(&vtbl
[i
], i
);
222 ubi_dbg_dump_vtbl_record(&vtbl
[n
], n
);
231 ubi_err("volume table check failed: record %d, error %d", i
, err
);
232 ubi_dbg_dump_vtbl_record(&vtbl
[i
], i
);
237 * create_vtbl - create a copy of volume table.
238 * @ubi: UBI device description object
239 * @si: scanning information
240 * @copy: number of the volume table copy
241 * @vtbl: contents of the volume table
243 * This function returns zero in case of success and a negative error code in
246 static int create_vtbl(struct ubi_device
*ubi
, struct ubi_scan_info
*si
,
247 int copy
, void *vtbl
)
250 static struct ubi_vid_hdr
*vid_hdr
;
251 struct ubi_scan_volume
*sv
;
252 struct ubi_scan_leb
*new_seb
, *old_seb
= NULL
;
254 ubi_msg("create volume table (copy #%d)", copy
+ 1);
256 vid_hdr
= ubi_zalloc_vid_hdr(ubi
, GFP_KERNEL
);
261 * Check if there is a logical eraseblock which would have to contain
262 * this volume table copy was found during scanning. It has to be wiped
265 sv
= ubi_scan_find_sv(si
, UBI_LAYOUT_VOLUME_ID
);
267 old_seb
= ubi_scan_find_seb(sv
, copy
);
270 new_seb
= ubi_scan_get_free_peb(ubi
, si
);
271 if (IS_ERR(new_seb
)) {
272 err
= PTR_ERR(new_seb
);
276 vid_hdr
->vol_type
= UBI_VID_DYNAMIC
;
277 vid_hdr
->vol_id
= cpu_to_be32(UBI_LAYOUT_VOLUME_ID
);
278 vid_hdr
->compat
= UBI_LAYOUT_VOLUME_COMPAT
;
279 vid_hdr
->data_size
= vid_hdr
->used_ebs
=
280 vid_hdr
->data_pad
= cpu_to_be32(0);
281 vid_hdr
->lnum
= cpu_to_be32(copy
);
282 vid_hdr
->sqnum
= cpu_to_be64(++si
->max_sqnum
);
283 vid_hdr
->leb_ver
= cpu_to_be32(old_seb
? old_seb
->leb_ver
+ 1: 0);
285 /* The EC header is already there, write the VID header */
286 err
= ubi_io_write_vid_hdr(ubi
, new_seb
->pnum
, vid_hdr
);
290 /* Write the layout volume contents */
291 err
= ubi_io_write_data(ubi
, vtbl
, new_seb
->pnum
, 0, ubi
->vtbl_size
);
296 * And add it to the scanning information. Don't delete the old
297 * @old_seb as it will be deleted and freed in 'ubi_scan_add_used()'.
299 err
= ubi_scan_add_used(ubi
, si
, new_seb
->pnum
, new_seb
->ec
,
302 ubi_free_vid_hdr(ubi
, vid_hdr
);
306 if (err
== -EIO
&& ++tries
<= 5) {
308 * Probably this physical eraseblock went bad, try to pick
311 list_add_tail(&new_seb
->u
.list
, &si
->corr
);
316 ubi_free_vid_hdr(ubi
, vid_hdr
);
322 * process_lvol - process the layout volume.
323 * @ubi: UBI device description object
324 * @si: scanning information
325 * @sv: layout volume scanning information
327 * This function is responsible for reading the layout volume, ensuring it is
328 * not corrupted, and recovering from corruptions if needed. Returns volume
329 * table in case of success and a negative error code in case of failure.
331 static struct ubi_vtbl_record
*process_lvol(struct ubi_device
*ubi
,
332 struct ubi_scan_info
*si
,
333 struct ubi_scan_volume
*sv
)
337 struct ubi_scan_leb
*seb
;
338 struct ubi_vtbl_record
*leb
[UBI_LAYOUT_VOLUME_EBS
] = { NULL
, NULL
};
339 int leb_corrupted
[UBI_LAYOUT_VOLUME_EBS
] = {1, 1};
342 * UBI goes through the following steps when it changes the layout
345 * b. write new data to LEB 0;
347 * d. write new data to LEB 1.
349 * Before the change, both LEBs contain the same data.
351 * Due to unclean reboots, the contents of LEB 0 may be lost, but there
352 * should LEB 1. So it is OK if LEB 0 is corrupted while LEB 1 is not.
353 * Similarly, LEB 1 may be lost, but there should be LEB 0. And
354 * finally, unclean reboots may result in a situation when neither LEB
355 * 0 nor LEB 1 are corrupted, but they are different. In this case, LEB
356 * 0 contains more recent information.
358 * So the plan is to first check LEB 0. Then
359 * a. if LEB 0 is OK, it must be containing the most resent data; then
360 * we compare it with LEB 1, and if they are different, we copy LEB
362 * b. if LEB 0 is corrupted, but LEB 1 has to be OK, and we copy LEB 1
366 dbg_msg("check layout volume");
368 /* Read both LEB 0 and LEB 1 into memory */
369 ubi_rb_for_each_entry(rb
, seb
, &sv
->root
, u
.rb
) {
370 leb
[seb
->lnum
] = vmalloc(ubi
->vtbl_size
);
371 if (!leb
[seb
->lnum
]) {
375 memset(leb
[seb
->lnum
], 0, ubi
->vtbl_size
);
377 err
= ubi_io_read_data(ubi
, leb
[seb
->lnum
], seb
->pnum
, 0,
379 if (err
== UBI_IO_BITFLIPS
|| mtd_is_eccerr(err
))
381 * Scrub the PEB later. Note, -EBADMSG indicates an
382 * uncorrectable ECC error, but we have our own CRC and
383 * the data will be checked later. If the data is OK,
384 * the PEB will be scrubbed (because we set
385 * seb->scrub). If the data is not OK, the contents of
386 * the PEB will be recovered from the second copy, and
387 * seb->scrub will be cleared in
388 * 'ubi_scan_add_used()'.
397 leb_corrupted
[0] = vtbl_check(ubi
, leb
[0]);
398 if (leb_corrupted
[0] < 0)
402 if (!leb_corrupted
[0]) {
405 leb_corrupted
[1] = memcmp(leb
[0], leb
[1], ubi
->vtbl_size
);
406 if (leb_corrupted
[1]) {
407 ubi_warn("volume table copy #2 is corrupted");
408 err
= create_vtbl(ubi
, si
, 1, leb
[0]);
411 ubi_msg("volume table was restored");
414 /* Both LEB 1 and LEB 2 are OK and consistent */
418 /* LEB 0 is corrupted or does not exist */
420 leb_corrupted
[1] = vtbl_check(ubi
, leb
[1]);
421 if (leb_corrupted
[1] < 0)
424 if (leb_corrupted
[1]) {
425 /* Both LEB 0 and LEB 1 are corrupted */
426 ubi_err("both volume tables are corrupted");
430 ubi_warn("volume table copy #1 is corrupted");
431 err
= create_vtbl(ubi
, si
, 0, leb
[1]);
434 ubi_msg("volume table was restored");
447 * create_empty_lvol - create empty layout volume.
448 * @ubi: UBI device description object
449 * @si: scanning information
451 * This function returns volume table contents in case of success and a
452 * negative error code in case of failure.
454 static struct ubi_vtbl_record
*create_empty_lvol(struct ubi_device
*ubi
,
455 struct ubi_scan_info
*si
)
458 struct ubi_vtbl_record
*vtbl
;
460 vtbl
= vmalloc(ubi
->vtbl_size
);
462 return ERR_PTR(-ENOMEM
);
463 memset(vtbl
, 0, ubi
->vtbl_size
);
465 for (i
= 0; i
< ubi
->vtbl_slots
; i
++)
466 memcpy(&vtbl
[i
], &empty_vtbl_record
, UBI_VTBL_RECORD_SIZE
);
468 for (i
= 0; i
< UBI_LAYOUT_VOLUME_EBS
; i
++) {
471 err
= create_vtbl(ubi
, si
, i
, vtbl
);
482 * init_volumes - initialize volume information for existing volumes.
483 * @ubi: UBI device description object
484 * @si: scanning information
485 * @vtbl: volume table
487 * This function allocates volume description objects for existing volumes.
488 * Returns zero in case of success and a negative error code in case of
491 static int init_volumes(struct ubi_device
*ubi
, const struct ubi_scan_info
*si
,
492 const struct ubi_vtbl_record
*vtbl
)
494 int i
, reserved_pebs
= 0;
495 struct ubi_scan_volume
*sv
;
496 struct ubi_volume
*vol
;
498 for (i
= 0; i
< ubi
->vtbl_slots
; i
++) {
501 if (be32_to_cpu(vtbl
[i
].reserved_pebs
) == 0)
502 continue; /* Empty record */
504 vol
= kzalloc(sizeof(struct ubi_volume
), GFP_KERNEL
);
508 vol
->reserved_pebs
= be32_to_cpu(vtbl
[i
].reserved_pebs
);
509 vol
->alignment
= be32_to_cpu(vtbl
[i
].alignment
);
510 vol
->data_pad
= be32_to_cpu(vtbl
[i
].data_pad
);
511 vol
->upd_marker
= vtbl
[i
].upd_marker
;
512 vol
->vol_type
= vtbl
[i
].vol_type
== UBI_VID_DYNAMIC
?
513 UBI_DYNAMIC_VOLUME
: UBI_STATIC_VOLUME
;
514 vol
->name_len
= be16_to_cpu(vtbl
[i
].name_len
);
515 vol
->usable_leb_size
= ubi
->leb_size
- vol
->data_pad
;
516 memcpy(vol
->name
, vtbl
[i
].name
, vol
->name_len
);
517 vol
->name
[vol
->name_len
] = '\0';
520 if (vtbl
[i
].flags
& UBI_VTBL_AUTORESIZE_FLG
) {
521 /* Auto re-size flag may be set only for one volume */
522 if (ubi
->autoresize_vol_id
!= -1) {
523 ubi_err("more then one auto-resize volume (%d "
524 "and %d)", ubi
->autoresize_vol_id
, i
);
529 ubi
->autoresize_vol_id
= i
;
532 ubi_assert(!ubi
->volumes
[i
]);
533 ubi
->volumes
[i
] = vol
;
536 reserved_pebs
+= vol
->reserved_pebs
;
539 * In case of dynamic volume UBI knows nothing about how many
540 * data is stored there. So assume the whole volume is used.
542 if (vol
->vol_type
== UBI_DYNAMIC_VOLUME
) {
543 vol
->used_ebs
= vol
->reserved_pebs
;
544 vol
->last_eb_bytes
= vol
->usable_leb_size
;
546 (long long)vol
->used_ebs
* vol
->usable_leb_size
;
550 /* Static volumes only */
551 sv
= ubi_scan_find_sv(si
, i
);
554 * No eraseblocks belonging to this volume found. We
555 * don't actually know whether this static volume is
556 * completely corrupted or just contains no data. And
557 * we cannot know this as long as data size is not
558 * stored on flash. So we just assume the volume is
559 * empty. FIXME: this should be handled.
564 if (sv
->leb_count
!= sv
->used_ebs
) {
566 * We found a static volume which misses several
567 * eraseblocks. Treat it as corrupted.
569 ubi_warn("static volume %d misses %d LEBs - corrupted",
570 sv
->vol_id
, sv
->used_ebs
- sv
->leb_count
);
575 vol
->used_ebs
= sv
->used_ebs
;
577 (long long)(vol
->used_ebs
- 1) * vol
->usable_leb_size
;
578 vol
->used_bytes
+= sv
->last_data_size
;
579 vol
->last_eb_bytes
= sv
->last_data_size
;
582 /* And add the layout volume */
583 vol
= kzalloc(sizeof(struct ubi_volume
), GFP_KERNEL
);
587 vol
->reserved_pebs
= UBI_LAYOUT_VOLUME_EBS
;
589 vol
->vol_type
= UBI_DYNAMIC_VOLUME
;
590 vol
->name_len
= sizeof(UBI_LAYOUT_VOLUME_NAME
) - 1;
591 memcpy(vol
->name
, UBI_LAYOUT_VOLUME_NAME
, vol
->name_len
+ 1);
592 vol
->usable_leb_size
= ubi
->leb_size
;
593 vol
->used_ebs
= vol
->reserved_pebs
;
594 vol
->last_eb_bytes
= vol
->reserved_pebs
;
596 (long long)vol
->used_ebs
* (ubi
->leb_size
- vol
->data_pad
);
597 vol
->vol_id
= UBI_LAYOUT_VOLUME_ID
;
600 ubi_assert(!ubi
->volumes
[i
]);
601 ubi
->volumes
[vol_id2idx(ubi
, vol
->vol_id
)] = vol
;
602 reserved_pebs
+= vol
->reserved_pebs
;
606 if (reserved_pebs
> ubi
->avail_pebs
)
607 ubi_err("not enough PEBs, required %d, available %d",
608 reserved_pebs
, ubi
->avail_pebs
);
609 ubi
->rsvd_pebs
+= reserved_pebs
;
610 ubi
->avail_pebs
-= reserved_pebs
;
616 * check_sv - check volume scanning information.
617 * @vol: UBI volume description object
618 * @sv: volume scanning information
620 * This function returns zero if the volume scanning information is consistent
621 * to the data read from the volume tabla, and %-EINVAL if not.
623 static int check_sv(const struct ubi_volume
*vol
,
624 const struct ubi_scan_volume
*sv
)
628 if (sv
->highest_lnum
>= vol
->reserved_pebs
) {
632 if (sv
->leb_count
> vol
->reserved_pebs
) {
636 if (sv
->vol_type
!= vol
->vol_type
) {
640 if (sv
->used_ebs
> vol
->reserved_pebs
) {
644 if (sv
->data_pad
!= vol
->data_pad
) {
651 ubi_err("bad scanning information, error %d", err
);
653 ubi_dbg_dump_vol_info(vol
);
658 * check_scanning_info - check that scanning information.
659 * @ubi: UBI device description object
660 * @si: scanning information
662 * Even though we protect on-flash data by CRC checksums, we still don't trust
663 * the media. This function ensures that scanning information is consistent to
664 * the information read from the volume table. Returns zero if the scanning
665 * information is OK and %-EINVAL if it is not.
667 static int check_scanning_info(const struct ubi_device
*ubi
,
668 struct ubi_scan_info
*si
)
671 struct ubi_scan_volume
*sv
;
672 struct ubi_volume
*vol
;
674 if (si
->vols_found
> UBI_INT_VOL_COUNT
+ ubi
->vtbl_slots
) {
675 ubi_err("scanning found %d volumes, maximum is %d + %d",
676 si
->vols_found
, UBI_INT_VOL_COUNT
, ubi
->vtbl_slots
);
680 if (si
->highest_vol_id
>= ubi
->vtbl_slots
+ UBI_INT_VOL_COUNT
&&
681 si
->highest_vol_id
< UBI_INTERNAL_VOL_START
) {
682 ubi_err("too large volume ID %d found by scanning",
687 for (i
= 0; i
< ubi
->vtbl_slots
+ UBI_INT_VOL_COUNT
; i
++) {
690 sv
= ubi_scan_find_sv(si
, i
);
691 vol
= ubi
->volumes
[i
];
694 ubi_scan_rm_volume(si
, sv
);
698 if (vol
->reserved_pebs
== 0) {
699 ubi_assert(i
< ubi
->vtbl_slots
);
705 * During scanning we found a volume which does not
706 * exist according to the information in the volume
707 * table. This must have happened due to an unclean
708 * reboot while the volume was being removed. Discard
711 ubi_msg("finish volume %d removal", sv
->vol_id
);
712 ubi_scan_rm_volume(si
, sv
);
714 err
= check_sv(vol
, sv
);
724 * ubi_read_volume_table - read volume table.
726 * @ubi: UBI device description object
727 * @si: scanning information
729 * This function reads volume table, checks it, recover from errors if needed,
730 * or creates it if needed. Returns zero in case of success and a negative
731 * error code in case of failure.
733 int ubi_read_volume_table(struct ubi_device
*ubi
, struct ubi_scan_info
*si
)
736 struct ubi_scan_volume
*sv
;
738 empty_vtbl_record
.crc
= cpu_to_be32(0xf116c36b);
741 * The number of supported volumes is limited by the eraseblock size
742 * and by the UBI_MAX_VOLUMES constant.
744 ubi
->vtbl_slots
= ubi
->leb_size
/ UBI_VTBL_RECORD_SIZE
;
745 if (ubi
->vtbl_slots
> UBI_MAX_VOLUMES
)
746 ubi
->vtbl_slots
= UBI_MAX_VOLUMES
;
748 ubi
->vtbl_size
= ubi
->vtbl_slots
* UBI_VTBL_RECORD_SIZE
;
749 ubi
->vtbl_size
= ALIGN(ubi
->vtbl_size
, ubi
->min_io_size
);
751 sv
= ubi_scan_find_sv(si
, UBI_LAYOUT_VOLUME_ID
);
754 * No logical eraseblocks belonging to the layout volume were
755 * found. This could mean that the flash is just empty. In
756 * this case we create empty layout volume.
758 * But if flash is not empty this must be a corruption or the
759 * MTD device just contains garbage.
762 ubi
->vtbl
= create_empty_lvol(ubi
, si
);
763 if (IS_ERR(ubi
->vtbl
))
764 return PTR_ERR(ubi
->vtbl
);
766 ubi_err("the layout volume was not found");
770 if (sv
->leb_count
> UBI_LAYOUT_VOLUME_EBS
) {
771 /* This must not happen with proper UBI images */
772 dbg_err("too many LEBs (%d) in layout volume",
777 ubi
->vtbl
= process_lvol(ubi
, si
, sv
);
778 if (IS_ERR(ubi
->vtbl
))
779 return PTR_ERR(ubi
->vtbl
);
782 ubi
->avail_pebs
= ubi
->good_peb_count
;
785 * The layout volume is OK, initialize the corresponding in-RAM data
788 err
= init_volumes(ubi
, si
, ubi
->vtbl
);
793 * Get sure that the scanning information is consistent to the
794 * information stored in the volume table.
796 err
= check_scanning_info(ubi
, si
);
804 for (i
= 0; i
< ubi
->vtbl_slots
+ UBI_INT_VOL_COUNT
; i
++)
805 if (ubi
->volumes
[i
]) {
806 kfree(ubi
->volumes
[i
]);
807 ubi
->volumes
[i
] = NULL
;
812 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
815 * paranoid_vtbl_check - check volume table.
816 * @ubi: UBI device description object
818 static void paranoid_vtbl_check(const struct ubi_device
*ubi
)
820 if (vtbl_check(ubi
, ubi
->vtbl
)) {
821 ubi_err("paranoid check failed");
826 #endif /* CONFIG_MTD_UBI_DEBUG_PARANOID */