#!/bin/bash
VG=$1
LV=$2
BPATH=$3
SNAME="${VG}-${LV}-snapshot"
OLVPATH="/dev/${VG}/${LV}"
MLVPATH="/mnt/${SNAME}"
SPATH="/dev/${VG}/${SNAME}"
ZPATH="${BPATH}/${SNAME}"

sudo lvcreate -L10G -s -n $SNAME $OLVPATH
sudo mkdir -p $MLVPATH
sudo mount $SPATH $MLVPATH
sudo rdiff --check-destination-dir --compare-hash $MLVPATH $ZPATH
sudo umount $MLVPATH
sudo rmdir $MLVPATH
sudo lvremove -f $SPATH