Re: Patch to support LUKS UUIDs in libblkid

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Karsten Hopp wrote:

> Thanks for applying the small patch !
> 
> FYI:
> I've opened a bugzilla about your udev concerns to get some comments from our
> and the upstream maintainer at
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245717
> 
> Kay Sievers from the udev team responded:
> #> That's nothing new. Guessing filesystems by magic bytes on the disk is by
> #> definition unsafe.
> #>
> #> _All_ filesystem formatters are required to wipe out _all_ existing signatures
> #> before applying a new signature. Even then, it's not entirely safe to probe, but
> #> we obviously have no alternatives.

We fought this for a while in xfs, trying to be sure we wipe out old fs
signatures at mkfs time.  It'd be nice to have a library to do such
things...

-Eric

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