[PATCH 00/13] UBI reliability improvements

[Artem Bityutskiy]

Hi,

here is a set of patches which should improve UBI reliability. I wrote them
during my trip to LinuxCon Brazil.

Patches 1-5 should be interesting for Matthieu CASTET - they improve -EUCLEAN
errors handling a little.

Patches 6-13 should be interesting for Matthew L. Creech - they presimably have
to help in catching why in his setup UBIFS refers unmapped LEB. I'm not sure
they will help, but there is a chance - my theory is that UBI decides that the
LEB is corrupted and wipes it. With this patch-set UBI should instead preserve
corrupted LEBs, so we could take a look what happened.

Please, reveiw, test. I tested them a little as well, but not extensively.

Artem.