ubifs : corruption after power cut test

[Matthieu CASTET]

Matthieu CASTET a écrit :
> Matthieu CASTET a écrit :
>> Hi,
>>
>> we found some bug in our driver. Now there no more ubifs error when
>> there is uncorrectable ecc error (they should happen in the last
>> (interrupted) written page).
>>
>> But now we got "validate_master: bad master node at offset 69632 error
>> 7" [1].
> notice that gc_lnum==-1 in this case.
> Also this didn't happen on power cut.
> The senario was :
> - power cut
> - mount fs [1]
> - do some fs operation
> - umount fs quickly (9 second after mount in this case) [2]
> - mount fs [3]
> 
> The the problem seems that gc_lnum==-1 is not handled in mount or
> shouldn't happen in umount.
> 
The attached patch try to support mount with gc_lnum == -1.

Does it look sane ?


Matthieu
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