[U-Boot] Unreadable UBIFS partition after power cuts

From: Heiko Schocher <hs@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] Unreadable UBIFS partition after power cuts
Date: Wed, 14 Jan 2015 15:57:31 +0100	[thread overview]
Message-ID: <54B683DB.2030108@denx.de> (raw)
In-Reply-To: <150521CB44B50A4A98049E9C7BAFB0F30D9B823F@DETENEXMB01.delta.corp>

Hello Anton,

Am 14.01.2015 13:52, schrieb Anton Habegger:
> Hello
>
> We have a PPC MPC5125 device with 64MB NOR flash. The U-boot has to load the kernel and initramfs from a UBIFS partition.
> Recently we made an upgrade from U-Boot version V2010.12 to version V2014.10. Now after some regression tests with power cuts, we got an UBIFS state, which is unreadable for U-Boot  version  V2014.10. If I do a tftpboot an mount the UBIFS with linux, there is no problem. It is also very strange, that if I downgrade the U-Boot to V2010.12, then it is also no problem with the partition and everything is readable. I tend to say there is probably a regression with the most recent U-Boot version. But I don't know where I can start to find it. I enabled also the DEBUG define, but there appears no additional debug message concerning UBIFS. How can I debug this?

You can enable:

#undef CONFIG_UBI_SILENCE_MSG
#define CONFIG_MTD_DEBUG
#define CONFIG_MTD_DEBUG_VERBOSE 1

With which Linux version do you test? U-Boot is synced with
linux 3.15 ... so, if you can test it with a kernel >= 3.15
this would be great!

> Here the output from U-Boot V2014.10:
>
> => ubi part fs
> UBI: attaching mtd1 to ubi0
> UBI: scanning is finished
> UBI: attached mtd1 (name "mtd=0", size 63 MiB) to ubi0
> UBI: PEB size: 131072 bytes (128 KiB), LEB size: 130944 bytes
> UBI: min./max. I/O unit sizes: 1/64, sub-page size 1
> UBI: VID header offset: 64 (aligned 64), data offset: 128
> UBI: good PEBs: 504, bad PEBs: 0, corrupted PEBs: 0
> UBI: user volume: 1, internal volumes: 1, max. volumes count: 128
> UBI: max/mean erase counter: 280/161, WL threshold: 4096, image sequence number: 2041090957
> UBI: available PEBs: 0, total reserved PEBs: 504, PEBs reserved for bad PEB handling: 0
> => ubifsmount ubi:flash
> => ubifsls
> 	    53549  Mon Dec 01 11:34:08 2014  setup.xml
> 	     2051  Wed Nov 19 09:05:49 2014  LOG_Default_000001.csv
> 	filldir: Error in ubifs_iget(), ino=44049 ret=ffffffea!

seems a problem in ubifs_iget() fs/ubifs/super.c ... it returns -EINVAL
please debug into this function for a starting point.

Thanks!

bye,
Heiko

>
> Regards
> Anton
>
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