s390-tools/dasd_reload.suse

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#!/bin/sh
#
# dasd_reload
# $Id: dasd_reload,v 1.2 2004/05/26 15:17:09 hare Exp $
#
# Deconfigures all active DASDs, unloads the modules
# and activates the configured DASDs again.
# Needed to establish an identical device mapping
# in the installation system and in the running system.
# All DASD access need to be cancelled prior to running
# this script.
#
# Usage:
# dasd_reload
#
# Return values:
# 1 Cannot read /proc/modules
# 2 Missing module programs
# 3 /sys not mounted
# 4 Failure on deactivate DASDs
#
if [ ! -r /proc/modules ]; then
echo "Cannot read /proc/modules"
exit 1
fi
if [ ! -x /sbin/rmmod -o ! -x /sbin/modprobe ]; then
echo "Missing module programs"
exit 2
fi
if [ ! -d /sys/bus ]; then
echo "sysfs not mounted"
exit 3
fi
let anymd=0
if [ -f /proc/mdstat ]; then
for mddevice in $(grep active /proc/mdstat | cut -f1 -d:); do
mdadm -S /dev/${mddevice}
let anymd=1
done
udevadm settle
fi
#
# Setting HyperPAV alias devices offline
#
dasd_alias=
let EXITRC=0
for dev in /sys/bus/ccw/devices/*; do
if [ -f ${dev}/use_diag ]; then
read _online < ${dev}/online
read _alias < ${dev}/alias
if [ "$_online" -eq 1 -a "$_alias" -eq 1 ]; then
echo "setting DASD HyperPAV alias $(basename ${dev}) offline"
echo "0" > ${dev}/online
read _online < ${dev}/online
dasd_alias="${dasd_alias} $(basename ${dev})"
if [ "$_online" -eq 1 ]; then
echo "failure on setting DASD HyperPAV alias $(basename ${dev}) offline !"
let EXITRC=4
fi
fi
fi
done
#
# Setting "normal" DASD and HyperPAV base devices offline
#
dasd_base=
for dev in /sys/bus/ccw/devices/*; do
if [ -f ${dev}/use_diag ]; then
read _online < ${dev}/online
read _alias < ${dev}/alias
if [ "$_online" -eq 1 -a "$_alias" -eq 0 ]; then
echo "setting DASD $(basename ${dev}) offline"
echo "0" > ${dev}/online
read _online < ${dev}/online
dasd_base="${dasd_base} $(basename ${dev})"
if [ "$_online" -eq 1 ]; then
echo "failure on setting DASD $(basename ${dev}) offline !"
let EXITRC=4
fi
fi
fi
done
udevadm settle
module_list=
module_test_list="dasd_diag_mod dasd_eckd_mod dasd_fba_mod dasd_mod"
for module in ${module_test_list}; do
if grep -q "${module}" /proc/modules; then
module_list="${module} ${module_list}"
: Unloading ${module}
/sbin/rmmod ${module}
fi
done
udevadm settle
sleep 2
if [ -d /etc/udev/rules.d ]; then
cd /etc/udev/rules.d
#
# Re-activating "normal" DASD and HyperPAV base devices
#
# We need to move all the DASD udev rules out from /etc/udev/rules.d
# because if we don't, then when the first DASD volume gets brought
# back online, they are all brought back online, in a non-deterministic
# order, not the numeric order we expect.
#
mv -i 41-dasd-*.rules 51-dasd-*.rules /tmp
cd /tmp
for dasd in ${dasd_base}; do
for file in 41-dasd-*-${dasd}.rules 51-dasd-${dasd}.rules; do
[ -f "${file}" ] || continue
#
# Special handling is needed for old udev rules that start with 51-
# since the chzdev command won't look for that name
#
prefix="$(echo ${file} | cut -f1 -d-)"
if [ "${prefix}" == "51" ]; then
if [ -h /sys/bus/ccw/drivers/dasd-eckd/${dasd} ]; then
mv -i ${file} 41-dasd-eckd-${dasd}.rules
elif [ -h /sys/bus/ccw/drivers/dasd-fba/${dasd} ]; then
mv -i ${file} 41-dasd-fba-${dasd}.rules
else echo "DASD volume ${dasd} is neither an ECKD or FBA device."
let EXITRC=4
fi
fi
echo Activating ${dasd}
mv -i "${file}" /etc/udev/rules.d/
/sbin/chzdev dasd --apply --configured -q --no-root-update ${dasd}
lsdasd
break
done
done
#
# Re-activating HyperPAV alias devices
#
for dasd in ${dasd_alias}; do
for file in 41-dasd-*-${dasd}.rules 51-dasd-${dasd}.rules; do
[ -f "${file}" ] || continue
echo Activating ${dasd}
mv -i "${file}" /etc/udev/rules.d/
/sbin/chzdev dasd --apply --configured -q --no-root-update ${dasd}
break
done
done
fi
exit ${EXITRC}