[U-Boot] UBIFS fails on SheevaPlug

[Andreas Bießmann]

Dear Dimax,

On 29.10.2012 20:05, Dimax wrote:
>> U-boot will _not_ recover your UBIFS partition like the Linux kernel.
> CMIIW.
> In other words it is not possible to use UBIFS on embedded Linux boards
> with u-boot unless you can provide unterminated power supply.

NAK

I invested some time to reproduce this, however see following scenario:

---8<---
DockStar> ubi part root; ubifsmount root
Creating 1 MTD partitions on "nand0":
0x000000100000-0x000010000000 : "mtd=1"
UBI: attaching mtd1 to ubi0
UBI: physical eraseblock size:   131072 bytes (128 KiB)
UBI: logical eraseblock size:    129024 bytes
UBI: smallest flash I/O unit:    2048
UBI: sub-page size:              512
UBI: VID header offset:          512 (aligned 512)
UBI: data offset:                2048
UBI: attached mtd1 to ubi0
UBI: MTD device name:            "mtd=1"
UBI: MTD device size:            255 MiB
UBI: number of good PEBs:        2040
UBI: number of bad PEBs:         0
UBI: max. allowed volumes:       128
UBI: wear-leveling threshold:    4096
UBI: number of internal volumes: 1
UBI: number of user volumes:     1
UBI: available PEBs:             20
UBI: total number of reserved PEBs: 2020
UBI: number of PEBs reserved for bad PEB handling: 20
UBI: max/mean erase counter: 4/2
UBIFS: recovery needed
UBIFS error (pid 0): ubifs_mount: Error reading superblock on volume 
'ubi:root' errno=-12!

ubifsmount - mount UBIFS volume

Usage:
ubifsmount <volume-name>
     - mount 'volume-name' volume
DockStar> ver

U-Boot 2012.10 (Oct 30 2012 - 00:46:13)
Seagate FreeAgent DockStar
arm-v5te-linux-gnueabi-gcc (OSELAS.Toolchain-2011.11.0) 4.6.2
GNU ld (GNU Binutils) 2.21.1
DockStar>
--->8---

---8<---
DockStar> ubi part root; ubifsmount root
Creating 1 MTD partitions on "nand0":
0x000000100000-0x000010000000 : "mtd=1"
UBI: attaching mtd1 to ubi0
UBI: physical eraseblock size:   131072 bytes (128 KiB)
UBI: logical eraseblock size:    129024 bytes
UBI: smallest flash I/O unit:    2048
UBI: sub-page size:              512
UBI: VID header offset:          512 (aligned 512)
UBI: data offset:                2048
UBI: attached mtd1 to ubi0
UBI: MTD device name:            "mtd=1"
UBI: MTD device size:            255 MiB
UBI: number of good PEBs:        2040
UBI: number of bad PEBs:         0
UBI: max. allowed volumes:       128
UBI: wear-leveling threshold:    4096
UBI: number of internal volumes: 1
UBI: number of user volumes:     1
UBI: available PEBs:             20
UBI: total number of reserved PEBs: 2020
UBI: number of PEBs reserved for bad PEB handling: 20
UBI: max/mean erase counter: 4/2
UBIFS: recovery needed
UBIFS: recovery deferred
UBIFS: mounted UBI device 0, volume 0, name "root"
UBIFS: mounted read-only
UBIFS: file system size:   255854592 bytes (249858 KiB, 244 MiB, 1983 LEBs)
UBIFS: journal size:       12773376 bytes (12474 KiB, 12 MiB, 99 LEBs)
UBIFS: media format:       w4/r0 (latest is w4/r0)
UBIFS: default compressor: LZO
UBIFS: reserved for root:  5182151 bytes (5060 KiB)
DockStar> ver

U-Boot 2012.10-00001-g65cc68e (Oct 30 2012 - 00:50:51)
Seagate FreeAgent DockStar
arm-v5te-linux-gnueabi-gcc (OSELAS.Toolchain-2011.11.0) 4.6.2
GNU ld (GNU Binutils) 2.21.1
DockStar>
--->8---

---8<---
andreas at andreas-pc % git describe
v2012.10-1-g65cc68e
andreas at andreas-pc % git show
| commit 65cc68eb06df0c957a17a611bc3f3756e91108b2 (HEAD, test-malloc)
| Author: Andreas Bießmann <andreas.devel at googlemail.com>
| Date:   Mon Oct 29 21:36:53 2012 +0100
|
|     mv-common.h: increase malloc arena to 4MiB
|
|     Signed-off-by: Andreas Bießmann <andreas.devel at googlemail.com>
|
| diff --git a/include/configs/mv-common.h b/include/configs/mv-common.h
| index 7086d1d..405a842 100644
| --- a/include/configs/mv-common.h
| +++ b/include/configs/mv-common.h
| @@ -92,7 +92,7 @@
|  /*
|   * Size of malloc() pool
|   */
| -#define CONFIG_SYS_MALLOC_LEN  (1024 * 1024) /* 1MiB for malloc() */
| +#define CONFIG_SYS_MALLOC_LEN  (1024 * 1024 * 4) /* 4MiB for malloc() */
|
| /*
|  * Other required minimal configurations
--->8---

Best regards

Andreas Bießmann