On 05/03/2018 20:47, Marc MERLIN wrote:
> On Mon, Mar 05, 2018 at 10:38:16PM +0300, Andrei Borzenkov wrote:
>>> If I absolutely know that the data is the same on both sides, how do I
>>> either
>>> 1) force back in a 'Received UUID' value on the destination
>> I suppose the most simple is to write small program that does it using
> Understdood.
> Given that I have not worked with the code at all, what is the best 
> tool in btrfs progs, to add this to?
> btrfstune?
> btrfs propery set?
> other?
> David, is this something you'd be willing to add support for?
> (to be honest, it'll be quicker for someone who knows the code to add than
> for me, but if no one has the time, I'l see if I can have a shot at it)

If you want something right now that works, so you can continue doing
your backups, python-btrfs also has the ioctl, since v9, together with
an example of using it:


P.S. even when coding it in C, the documentation in that commit message
might be useful. :)

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