[PATCH RFC 2/2] mtd: ubi: add support for protecting critical volumes

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "Daniel Golle" <daniel at makrotopia.org>
>> like a ubirmvol ... --i-know-what-im-doing.
> 
> True, enforcement doesn't need to happen in kernel (though I think it's
> nicer, but really just a matter of taste, I guess). ubi-tools would still
> need to be able to recognize critical volumes somehow, and that could be
> done by checking if the 'volume-is-critical' property is present in
> /sys/class/ubi/ubi*_*/of_node/

Exactly.
I also don't mind adding a in-memory 'volume-is-critical' property to
UBI directly. I'm just a little hesitated to change the UAPI or the on-disk
data structures for this features.
 
> If you prefer going down that road instead I will work on patches for
> git.infradead.org/mtd-utils.git instead.

Yes. When done in userspace, it's also much easier to offer the --i-know-what-im-doing
flag to still remove a critical volume.
No need to touch UAPI.

Zhihao Cheng, what do you think about this approach?

Thanks,
//richard