#!/bin/bash

# Script to unmount QCOW2 disk image and Borg backup vault
# Created: 2025-10-07

BORG_MOUNT="/mnt/restore"
QCOW2_MOUNT="/mnt/qcow2"

echo "=== Unmounting Backup System ==="

# Unmount QCOW2 filesystem
if mountpoint -q "$QCOW2_MOUNT"; then
    echo "Unmounting $QCOW2_MOUNT..."
    umount "$QCOW2_MOUNT"
    echo "✓ QCOW2 filesystem unmounted"
else
    echo "ℹ $QCOW2_MOUNT is not mounted"
fi

# Deactivate LVM volume group
if vgs vgdata &>/dev/null; then
    echo "Deactivating LVM volume group..."
    vgchange -an vgdata 2>/dev/null || true
    echo "✓ LVM volume group deactivated"
fi

# Disconnect NBD device
if [ -b /dev/nbd0 ]; then
    echo "Disconnecting NBD device..."
    qemu-nbd --disconnect /dev/nbd0
    echo "✓ NBD device disconnected"
fi

# Unmount Borg vault
if mountpoint -q "$BORG_MOUNT"; then
    echo "Unmounting Borg vault..."
    borg umount "$BORG_MOUNT"
    echo "✓ Borg vault unmounted"
else
    echo "ℹ Borg vault is not mounted"
fi

echo ""
echo "Done! All backups unmounted."