On Sun, Jan 06, 2013 at 04:32:11PM +0100, Florian Albrechtskirchinger wrote:
> Add the following switches to mkfs.btrfs and update man page:
> * -U UUID, --uuid UUID
>
> Add the following switches to btrfs-convert:
> * -U UUID
> * -U new
> Generates a random UUID (default behavior).
> * -U copy
> Copies the UUID from the ext2fs.
Can you please enhance it with a check that the UUID is not duplicate
among other filesystems? It should be available throgh libblkid:
blkid_probe_lookup_value(probe, "UUID", &uuid, NULL);
This is a sort of paranoia check with the generated UUID, but I think
that an accidentally repeated command or copy&paste with an existing
uuid can happen.
thanks,
david
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