How-To Get Consolidate Size Information of all The Cinder Volumes Provisioned

#!/bin/bashcalsize()  {    export volsize=0    for vol in $volumes    do      s=$(openstack volume show $vol -c size -f value)      volsize=$((volsize+s))    done    echo "Tatal volume size in Gb= $volsize"}echo " select from the below    1) in-use volume size    2) total size of the volumes created "read Selectioncase $Selection in1)  echo "##calculating size of the volumes in-use##"  export volumes=$(openstack volume list --all -f value | awk '{if($3 == "in-use" || $2 == "in-use") print $1}')  calsize;;2)    echo "##calculating size of all the volumes created and not in error state"    export volumes=$(openstack volume list --all -f value | awk '{if($2 != "error" && $3 != "error") print $1}')    calsize;;esac