#!/bin/bash
dir='/proc/fs/lustre/mdt/'

if [[ ! -d ${dir} ]]
 then
   echo "Either this is not an active MDS or Lustre is not started"
   exit
 fi

cnt=$(ls -1 ${dir} | grep MDT | wc -l)
if ((cnt < 1))
 then
   echo "lustre is started -- but no MDTs are present on this machine"
   exit
 fi

# peocess each MDT
for mdt in $(ls -1 ${dir} | grep MDT)
 do
   ans=$(lctl get_param mdt.${mdt}.identity_upcall | awk -F'=' '{print $2}')
   if [[ 'X' == "X${ans}" ]]
    then 
      echo "lctl get_param mdt.${mdt}.identity_upcall produced unexpected results!"
    fi
   if [[ 'NONE' != "${ans}" ]]
    then 
      logger "The following command was executed: lctl set_param mdt.${mdt}.identity_upcall=NONE"
      lctl set_param mdt.${mdt}.identity_upcall=NONE
    fi
 done