[PATCH] UBI: add ubi_err() to report the failure of leb read

[hujianyang]

On 2014/12/16 17:21, Richard Weinberger wrote:
> Am 16.12.2014 um 09:02 schrieb hujianyang:
>> Hi,
>>
>> I met a problem that I was failed to mount a UBIFS partition.
>>
>> [   38.442770] UBI error: ubi_io_read: error -74 (ECC error) while reading 26624 bytes from PEB 54:104448, read 26624 bytes
>> [   38.852461] UBI error: ubi_io_read: error -74 (ECC error) while reading 77824 bytes from PEB 346:53248, read 77824 bytes
>> [   38.864142] UBIFS error (pid 1444): ubifs_recover_leb: corruption -3
>> [   38.870487] UBIFS error (pid 1444): ubifs_scanned_corruption: corruption at LEB 928:55280
>> [   38.878625] UBIFS error (pid 1444): ubifs_scanned_corruption: first 8192 bytes from LEB 928:55280
>> [   38.892117] UBIFS error (pid 1444): ubifs_recover_leb: LEB 928 scanning failed
>> mount: mounting ubi1:bak on /HFFS2: failed: Structure needs cleaning
>>
>> I think it is caused by an ECC error of nand flash. Do we have some methods
>> to mount this partition? Data losing is acceptable.
> 
> I don't think that UBIFS has such a mount option.

Er, I don't know it either. How about a mount option like --force?

> You can dump the raw data and inspect the corrupted data.
> Maybe you can fix it by hand.

Yes, I want a try~! If we have to introduce a new feature or new mount
option. So would you like to help me? Do you think it's a valuable
work?


Thanks~

Hu