Wrong FS format on empty image creation

[dann1]

Description
Image creation creates ext2 empty datablock if XFS format is passed

To Reproduce
Create an empty datablock using the optional FS parameter. For example:

root@minione-6:~# oneimage create --size 200 --type datablock --name db_xfs --fs xfs -d 1
ID: 2
root@minione-6:~# oneimage show 2 | grep -i source
SOURCE         : /var/lib/one//datastores/1/5aa8e005041c1cc24dbf9550be4bfcae
root@minione-6:~# file -sL /var/lib/one//datastores/1/5aa8e005041c1cc24dbf9550be4bfcae
/var/lib/one//datastores/1/5aa8e005041c1cc24dbf9550be4bfcae: QEMU QCOW2 Image (v3), 209715200 bytes
root@minione-6:~# modprobe nbd
root@minione-6:~# qemu-nbd -c /dev/nbd0 /var/lib/one//datastores/1/5aa8e005041c1cc24dbf9550be4bfcae
root@minione-6:~# file -sL /dev/nbd0
/dev/nbd0: Linux rev 1.0 ext2 filesystem data, UUID=64eb69ab-77c0-48b2-b400-7609fd497ddc (large files)

Expected behavior
The empty datablock should get an XFS filesystem.

Details

• Version: 6.0+

Additional context
The datastore driver at some point runs an mkfs -t $FS command. This command by default fails with the following error in the output of mkfs

Your mke2fs.conf file does not define the xfs filesystem type.

However mkfs doesn't fail and instead it defaults to ext2

Progress Status

• Code commited
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)