s390-tools/killcdl.suse

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#!/bin/sh
#
# Copyright (c) 2016 SUSE LINUX GmbH, Nuernberg, Germany.
# Released under the GNU General Public License version 2.
#
let FORCE=0
DEVPARM=""
usage(){
echo "Usage: ${0} [ -f ] devno|busid"
echo " -f Force unformatting for DASD volumes in the CMS device range of 19x."
echo " devno The \"plain\" device number of the volume, e.g. 3184."
echo " busid The full specification of the volume, e.g., 0.0.3184."
}
ARCH="$(/bin/uname -m)"
if [ "${ARCH}" != "s390x" ] && [ "${ARCH}" != "s390" ]; then
echo "This script is only useful on IBM mainframes."
exit 1
fi
############################################################
# Parse the parameters from the command line
#
ARGS=$(getopt -a --options f -n "killcdl" -- "$@")
if [ $? -ne 0 ]; then
usage
exit 3
fi
eval set -- "${ARGS}"
for ARG; do
case "${ARG}" in
-f) FORCE=1
shift 1
;;
--) shift 1
;;
[0-9a-fA-F]*) if [ ! -z "${DEVPARM}" ]; then
echo "More than one parameter specified."
usage
exit 4
fi
DEVPARM=${1}
shift 1
;;
*) echo "That looks invalid"
usage
exit 5
;;
esac
done
if [ -z "${DEVPARM}" ]; then
echo "You must specify the device number of the DASD volume to be unformatted."
usage
exit 6
fi
DEVNO=$(echo "${DEVPARM}" | tr A-Z a-z)
# Validate the device number or busid provided
set -- $(IFS='.'; echo ${DEVNO})
let NUMPARMS=${#}
if [ ${NUMPARMS} -ne 1 ] && [ ${NUMPARMS} -ne 3 ]; then
echo "You have not specified the device number in a recognizable format."
echo "It must either be the plain device number, e.g., 0123, or in"
echo "so-called busid format, e.g., 0.0.0123"
exit 7
fi
# Just a device number, SIMPLE=1. A busid, SIMPLE=0
SIMPLE=0
if [ ${NUMPARMS} -eq 1 ]; then
let SIMPLE=1
let FIRST=0
let FIRSTLEN=1
let SECOND=0
let SECONDLEN=1
DEVNO="${1}"
let DEVNOLEN=${#1}
else FIRST="${1}"
let FIRSTLEN=${#FIRST}
SECOND="${2}"
let SECONDLEN=${#SECOND}
DEVNO="${3}"
let DEVNOLEN=${#3}
fi
if [ ${FIRSTLEN} -ne 1 ] || [ ${SECONDLEN} -ne 1 ]; then
echo "The first and second fields of the busid may only be one digit long."
exit 8
fi
if [ ${DEVNOLEN} -gt 4 ]; then
echo "The device number may only be 4 digits long."
exit 9
fi
if [ ${DEVNOLEN} -lt 4 ]; then
DEVNO=$(echo "0000${DEVNO}" | rev | cut -c1-4 | rev)
fi
BUSID="${FIRST}.${SECOND}.${DEVNO}"
if [ ! -h /sys/bus/ccw/devices/${BUSID} ]; then
echo "Busid ${BUSID} was not found."
/sbin/cio_ignore -i ${BUSID} > /dev/null
if [ $? -eq 0 ]; then
echo "That device is in the cio_ignore list."
echo "Please remove it with \"cio_ignore -r ${BUSID}\" before trying again."
fi
exit 10
fi
case ${DEVNO:0:3} in
019) if grep -q "version = FF" /proc/cpuinfo 2>/dev/null; then
echo "That looks like a CMS disk."
if [ ${FORCE} -eq 0 ]; then
echo "Specify the -f option to force the operation."
exit 11
fi
echo "But you specified -f so we'll kill it anyway."
fi
;;
esac
read ORIG_ONLINE_STATUS < /sys/bus/ccw/devices/${BUSID}/online
DISCIPLINE="none"
if [ -r /sys/bus/ccw/devices/${BUSID}/discipline ]; then
# We have to bring the device online before the kernel will fill in
# the value for discipline.
if [ ${ORIG_ONLINE_STATUS} -eq 0 ]; then
/sbin/chccwdev -e ${BUSID}
/sbin/udevadm settle
fi
read STATUS < /sys/bus/ccw/devices/${BUSID}/status
if [ "${STATUS}" == "unformatted" ]; then
echo "DASD device ${BUSID} is already in an unformatted state."
if [ ${ORIG_ONLINE_STATUS} -eq 0 ]; then
/sbin/chccwdev -d -s ${BUSID}
/sbin/udevadm settle
fi
exit 0
fi
read DISCIPLINE < /sys/bus/ccw/devices/${BUSID}/discipline
else read CU_TYPE < /sys/bus/ccw/devices/${BUSID}/cutype
read DEV_TYPE < /sys/bus/ccw/devices/${BUSID}/devtype
case "${CU_TYPE}" in
3990/*|2105/*|2107/*|1750/*|9343/*)
DISCIPLINE=ECKD
;;
3880/*)
case "${DEV_TYPE}" in
3390/*)
DISCIPLINE=ECKD
;;
esac
;;
esac
fi
if [ "${DISCIPLINE}" != "ECKD" ]; then
echo "This script only works on ECKD DASD."
if [ ${ORIG_ONLINE_STATUS} -eq 0 ]; then
/sbin/chccwdev -d -s ${BUSID}
fi
exit 12
fi
read STATUS < /sys/bus/ccw/devices/${BUSID}/online
if [ ${STATUS} -eq 1 ]; then
if [ ! -h /dev/disk/by-path/ccw-${BUSID} ]; then
echo "The udev-generated symbolic link in /dev/disk/by-path was not found."
exit 13
fi
/sbin/chccwdev -d -s ${BUSID}
/sbin/udevadm settle
read STATUS < /sys/bus/ccw/devices/${BUSID}/online
if [ ${STATUS} -ne 0 ]; then
echo "Device number ${DEVNO} didn't go offline. Unable to continue."
exit 14
fi
fi
/sbin/chccwdev -a raw_track_access=1 -e ${BUSID}
/sbin/udevadm settle
read STATUS < /sys/bus/ccw/devices/${BUSID}/online
if [ ${STATUS} -ne 1 ]; then
echo "Unable to bring ${DEVNO} online. Unable to continue."
exit 15
fi
# After this point, we will kill the formatting on the device
perl -e 'for ($h=0;$h<2;$h++){printf "\0\0\0%c\0\0\0\x8%s",$h,(("\0"x8).("\xff"x8).("\0"x65512))}' | dd bs=65536 count=2 oflag=direct of=/dev/disk/by-path/ccw-${BUSID} >/dev/null 2>&1
if [ "$?" -ne 0 ]; then
echo "The writing of the null record 0 failed."
exit 16
fi
echo "Setting ${BUSID} back offline with raw track access disabled."
/sbin/chccwdev -d -s -a raw_track_access=0 ${BUSID}
/sbin/udevadm settle
if [ ${ORIG_ONLINE_STATUS} -eq 1 ]; then
/sbin/chccwdev -e ${BUSID}
/sbin/udevadm settle
fi