Re: Problem mounting a UBIFS volume

[Artem Bityutskiy <dedekind@infradead.org>]

Hi Bruce,

On Wed, 2008-07-02 at 22:18 -0700, Bruce_Leonard@selinc.com wrote:
> Artem,
> 
> I'm trying to wrap up my changes to support >8GiB MTD devices so it can be 
> tested while I'm on vacation.  For the most part things run okay (I think 
> :-\  ).  I can load UBI and UBIFS.  ubimkvol/ubirmvol seem to work okay 
> and I can mount/read/write/umount volumes created with ubimkvol.  But I 
> have a problem when using mkfs.ubifs and I'm not sure if the problme is in 
> mkfs.ubifs or in the kernel.  mkfs.ubifs runs fine and finishes without 
> complaining.  ubiupdatevol seems to have no problems writing the image to 
> the device.  When I try to mount the volume, though, it fails to mount and 
> gives the following error:

Did you use your MTD 64-bit patch? Did you create a large FS image with
mkfs.ubifs? How large is the ubifs image?

> UBIFS error (pid 824): ubifs_read_nnode: error -22 reading nnode at 8:6150
> UBIFS DBG (pid 825): ubifs_bg_thread: background thread "ubifs_bgt0_0" 
> stops
> 
> 
> Now obviously there's a CRC mismatch between what was written to the flash 
> and what UBIFS calculated.  At first I thought it might be an endian issue 
> (my system is an MPC8347E running the tip of the UBIFS tree and the latest 
> UBI tools and mkfs.ubifs), but I don't think so since the stored CRC is 
> clearly different from the calculated.  I'm digging trying to find the 
> problem but I'm into things I've never seen before and don't yet 
> understand.  I now suspect that it's probably another one of those 64-bit 
> promotions I've been fighting, but I'm not sure.  Any guidence you can 
> give would be appreciated.

We'll look at this, thanks for the report.

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)