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#!/bin/bash
if [ "$(id -u)" != "0" ]; then
echo "Please run as root" 1>&2
exit 1
fi
progname=$(basename $0)
function usage()
{
cat << HEREDOC
Usage:
Mount Image : $progname [--mount] [--image-name <path to qcow2 image>] [--mount-point <mount point>]
Umount Image: $progname [--umount] [--mount-point <mount point>]
Cleanup NBD : $progname [--cleanup]
arguments:
-h, --help show this help message and exit
-c, --cleanup cleanup orphaned device mappings
-m, --mount mount image
-u, --umount umount image
-i, --image-name path to qcow2 image
-p, --mount-point mount point for image
This tool will use /dev/nbd1 as default for mounting an image. If you want to use another device, execute like this:
NBD_DEV=/dev/nbd2 ./$progname --mount --image <your image> --mount-point <your path>
HEREDOC
}
MOUNT=0
UMOUNT=0
IMAGE=""
MOUNTPOINT=""
nbd_cleanup() {
DEVS="$(lsblk | grep nbd | grep disk | cut -d" " -f1)"
if [ ! -z "${DEVS}" ]; then
for d in $DEVS; do
if [ ! -z "${d}" ]; then
QDEV="$(ps xa | grep $d | grep -v grep)"
if [ -z "${QDEV}" ]; then
kpartx -d /dev/$d && echo "Unconnected device map removed: /dev/$d"
fi
fi
done
fi
}
# As long as there is at least one more argument, keep looping
while [[ $# -gt 0 ]]; do
key="$1"
case "$key" in
-h|--help)
usage
exit
;;
-c|--cleanup)
nbd_cleanup
;;
-m|--mount)
MOUNT=1
;;
-u|--umount)
UMOUNT=1
;;
-i|--image-name)
shift
IMAGE="$1"
;;
-p|--mount-point)
shift
MOUNTPOINT="$1"
;;
*)
echo "Unknown option '$key'"
usage
exit
;;
esac
# Shift after checking all the cases to get the next option
shift
done
if [ "${MOUNT}" = "1" ] && [ "${UMOUNT}" = "1" ]; then
usage
echo "Concurrent mount options not possible."
exit
fi
if [ "${MOUNT}" = "1" ] && ([ -z "${IMAGE}" ] || [ -z "${MOUNTPOINT}" ]); then
usage
echo "Can not mount image. Image path and/or mount point missing."
exit
fi
if [ "${UMOUNT}" = "1" ] && [ -z "${MOUNTPOINT}" ]; then
usage
echo "Can not umount. Mount point parameter missing."
exit
fi
export NBD_DEV="${NBD_DEV:-/dev/nbd1}"
source scripts/qcow2_handling
if [ "${MOUNT}" = "1" ]; then
mount_qimage "${MOUNTPOINT}" "${IMAGE}"
elif [ "${UMOUNT}" = "1" ]; then
umount_qimage "${MOUNTPOINT}"
fi
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