ZFS SMB dfree

zfs_dfree

#!/bin/bash
CUR_PATH=$(pwd)

function GET_ZPOOL {
  arrIN=(${CUR_PATH//\// })
  echo "${arrIN[0]}"
}
ZPOOL=$(GET_ZPOOL)

ZFS_CHECK_OUTPUT=$(zfs get type "$ZPOOL" 2>&1 > /dev/null) > /dev/null
if [[ $ZFS_CHECK_OUTPUT == *dataset\ does\ not\ exist* ]]
then
    IS_ZFS=false
else
    IS_ZFS=true
fi
if [[ $IS_ZFS = false ]]
then
df "$CUR_PATH" | tail -1 | awk '{print $2" "$4}'
else
USED_SNAPSHOTS=$(($(zfs get -o value -Hp usedbysnapshots "$ZPOOL") / 1024)) > /dev/null
USED_DATSET=$(($(zfs get -o value -Hp usedbydataset "$ZPOOL") / 1024)) > /dev/null
USED_CHILDREN=$(($(zfs get -o value -Hp usedbychildren "$ZPOOL") / 1024)) > /dev/null
USED=$((USED_SNAPSHOTS + USED_DATSET + USED_CHILDREN))

AVAIL=$(($(zfs get -o value -Hp available "$ZPOOL") / 1024)) > /dev/null
TOTAL=$((USED+AVAIL)) > /dev/null

echo $TOTAL $AVAIL
fi