File dasd_configure of Package s390-tools

#! /bin/sh
#
# dasd_configure
# $Id: dasd_configure,v 1.10 2004/11/26 15:50:48 hare Exp $
#
# Configures a DASD
#
# Usage:
#   dasd_configure <ccwid> <online> <use_diag>
#
# Return values:
#   1  sysfs not mounted
#   2  Invalid status for <online>
#   3  No device found for <ccwid>
#   4  Could not change state of the device
#   5  Device is not a DASD
#   6  Could not load module
#

DEBUG=no

mesg () {
    echo "$@"
}

debug_mesg () {
    case "$DEBUG" in
        yes) mesg "$@" ;;
        *) ;;
    esac
}

# Get the mount point for sysfs
while read MNTPT MNTDIR MNTSYS MNTTYPE; do
    if test "$MNTSYS" = "sysfs"; then
	SYSFS="$MNTDIR"
	break;
    fi 
done </proc/mounts

if [ -z "$SYSFS" ]; then
    exit 1
fi

CCW_CHAN_ID=$1
ONLINE=$2
USE_DIAG=$3

[ -z "$USE_DIAG" ] && USE_DIAG=0

DEBUG="yes"

if [ -z "$ONLINE" ] || [ "$ONLINE" -ne "1" -a "$ONLINE" -ne "0" ]; then
    debug_mesg "Invalid device status $ONLINE"
    exit 2
fi

_ccw_dir=${SYSFS}/bus/ccw/devices

debug_mesg "Configuring device ${CCW_CHAN_ID}"
_ccw_status_dir="$_ccw_dir/$CCW_CHAN_ID"

if test ! -d "$_ccw_status_dir" ; then
    if test "$ONLINE" -eq 1 ; then
        debug_mesg "No device ${CCW_CHAN_ID}"
        exit 3
    fi
    _ccw_dev_status=0
else

    read _cu_type < $_ccw_status_dir/cutype
    read _dev_type < $_ccw_status_dir/devtype

    case "$_cu_type" in
    3990/*|2105/*|2107/*|1750/*|9343/*)
	CCW_CHAN_NAME="dasd-eckd"
	MODULE=dasd_eckd_mod
	DISCIPLINE=ECKD
	;;
    6310/*)
	CCW_CHAN_NAME="dasd-fba"
	MODULE=dasd_fba_mod
	DISCIPLINE=FBA
	;;
    3880/*)
	case "$_dev_type" in
	    3390/*)
		CCW_CHAN_NAME="dasd-eckd"
		MODULE=dasd_eckd_mod
		DISCIPLINE=ECKD
		;;
	    3370/*)
		CCW_CHAN_NAME="dasd-fba"
		MODULE=dasd_fba_mod
		DISCIPLINE=FBA
		;;
	    *)
		CCW_CHAN_NAME=
		;;
	esac
	;;
    *)
	CCW_CHAN_NAME=
	;;
    esac

    if [ -z "$CCW_CHAN_NAME" ]; then
        mesg "No a DASD device (cu $_cutype, dev $_devtype)"
        exit 5
    fi

    # Check for modules
    if test ! -d "${SYSFS}/bus/ccw/drivers/${CCW_CHAN_NAME}" ; then
        /sbin/modprobe $MODULE

        # Re-check whether module loading has succeeded
        if test ! -d "${SYSFS}/bus/ccw/drivers/${CCW_CHAN_NAME}"; then
	    debug_mesg "Could not load module ${MODULE}"
	    exit 6
        fi
    fi

    read _ccw_dev_status < $_ccw_status_dir/online
fi

if [ -x /sbin/vmcp ]; then
    # Unconditionally load the cpint module, loader might be broken
    [ -x /sbin/modprobe ] && /sbin/modprobe -q vmcp
    # Wait until udev is settled
    [ -x /sbin/udevadm ] && /sbin/udevadm settle --timeout=30

    # Check read-only status of virtual DASDs from z/VM
    if /sbin/vmcp q v dasd > /dasd_attr.lst 2> /dev/null; then
	while read x dev type label attr1 attr2 rest; do
	    dev=`echo $dev|tr A-F a-f`
	    if test "$type" = "ON"; then
		attr="$attr2"
	    else
		attr="$attr1"
	    fi
	    if [ "$CCW_CHAN_ID" = "0.0.$dev" ]; then
		if test "$attr" = "R/O"; then
		    _ccw_use_readonly="1"
		fi
	    fi
	done < /dasd_attr.lst
    fi
    rm -f /dasd_attr.lst
fi

if [ "$ONLINE" -eq 1 ]; then
    # Check whether we need to do something
    read _ccw_use_diag < $_ccw_status_dir/use_diag

    if [ "$_ccw_use_diag" -ne "$USE_DIAG" ] && 
	[ "$_ccw_dev_status" -eq 1 ] ; then
	# We need to change the DIAG access mode
	# so better set the device offline
	debug_mesg "Setting device offline for DIAG access"
	echo "0" > $_ccw_status_dir/online
        # Re-read device status
	read _ccw_dev_status < $_ccw_status_dir/online
	if [ "$_ccw_dev_status" -ne 0 ]; then
	    mesg "Could not set the device offline for DIAG access"
	    exit 4
	fi
    fi

    if [ "$_ccw_dev_status" -eq 0 ]; then
	# Set readonly access if detected
	if [ "$_ccw_use_readonly" ]; then
	    debug_mesg "Setting device read-only"
	    echo 1 > $_ccw_status_dir/readonly
	fi

	if [ "$USE_DIAG" -eq 1 ]; then
	    # Load the diag module if possible
	    [ -x /sbin/modprobe ] && /sbin/modprobe -q dasd_diag_mod
	    _has_dasd_diag=$(/bin/sed -n '/^dasd_diag_mod/p' /proc/modules)
	    if [ "$_has_dasd_diag" ]; then
	        # DIAG mode is special:
	        # We can only be sure if DIAG is available
	        # _after_ we have activated the device
		debug_mesg "Activating DIAG access mode"
		echo "$USE_DIAG" > $_ccw_status_dir/use_diag
		read _ccw_use_diag < $_ccw_status_dir/use_diag
	        # Set the device online
		debug_mesg "Setting device online"
		echo "1" > $_ccw_status_dir/online
                # Re-read device status
		read _ccw_dev_status < $_ccw_status_dir/online
		if [ "$_ccw_dev_status" -eq 0 ]; then
		    mesg "Could not activate DIAG access mode for device ${CCW_CHAN_ID}"
		    USE_DIAG=0
		    echo "$USE_DIAG" > $_ccw_status_dir/use_diag
	            # Set the device online
		    debug_mesg "Setting device online"
		    echo "1" > $_ccw_status_dir/online
		else
		    MODULE=dasd_diag_mod
		fi
	    else
		debug_mesg "DIAG mode not available"
		USE_DIAG=0
	        # Set the device online
		debug_mesg "Setting device online"
		echo "1" > $_ccw_status_dir/online
	    fi
	else
	    # Set the device online
	    debug_mesg "Setting device online"
	    echo "1" > $_ccw_status_dir/online
	fi
        # Re-read device status
	read _ccw_dev_status < $_ccw_status_dir/online
	if [ "$_ccw_dev_status" -eq 0 ]; then
	    mesg "Could not set device ${CCW_CHAN_ID} online"
	    exit 4
	fi
	# Wait for the device to come online
	read _dasd_state < $_ccw_status_dir/status
	i=0
	while [ "$_dasd_state" != "online" ] ; do 
		read _dasd_state < $_ccw_status_dir/status
		[ $i -gt 5 ] && break
		i=$(expr $i + 1)
	done
    else
	debug_mesg "Device ${CCW_CHAN_ID} is already online"
    fi
    read _dasd_state < $_ccw_status_dir/status
    if [ "$_dasd_state" != "online" ] ; then
	mesg "Failed to activate device ${CCW_CHAN_ID}, device in state $_dasd_state"
	exit 5
    fi
else
    if [ "$_ccw_dev_status" -eq 1 ]; then
        # Set the device offline
	debug_mesg "Setting device offline"
	echo "$ONLINE" > $_ccw_status_dir/online

        # Re-read to check whether we have succeeded
	_ccw_dev_status=$(cat $_ccw_status_dir/online)
	if [ "$_ccw_dev_status" -ne "$ONLINE" ]; then
	    debug_mesg "Could not set device ${CCW_CHAN_ID} offline"
	    exit 4
	fi
    else
	debug_mesg "Device ${CCW_CHAN_ID} is already offline"
    fi
    if [ -d "$_ccw_status_dir" ] ; then
        # Always disabling DIAG access
        echo "0" > $_ccw_status_dir/use_diag
    fi
    # Set readonly access if detected
    if [ "$_ccw_use_readonly" ]; then
	debug_mesg "Setting device read-only"
	echo 1 > $_ccw_status_dir/readonly
    fi
fi

# Wait until udev is settled
[ -x /sbin/udevadm ] && /sbin/udevadm settle --timeout=30

RULES_DIR=/etc/udev/rules.d
RULES_FILE=51-dasd-${CCW_CHAN_ID}.rules

if [ -d "$RULES_DIR" ]; then
    if [ -f ${RULES_DIR}/${RULES_FILE} ]; then
	rm -f ${RULES_DIR}/${RULES_FILE}
    fi

    if [ "$ONLINE" -eq "1" ]; then
        # Write a new hwcfg file
	cat > ${RULES_DIR}/${RULES_FILE} <<EOF
# Configure DASD device at ${CCW_CHAN_ID} (${DISCIPLINE} mode)
ACTION=="add", SUBSYSTEM=="ccw", KERNEL=="${CCW_CHAN_ID}", IMPORT{program}="collect ${CCW_CHAN_ID} %k ${CCW_CHAN_ID} ${CCW_CHAN_NAME}"
ACTION=="add", SUBSYSTEM=="drivers", KERNEL=="${CCW_CHAN_NAME}", IMPORT{program}="collect ${CCW_CHAN_ID} %k ${CCW_CHAN_ID} ${CCW_CHAN_NAME}"
EOF
	if [ "$USE_DIAG" -eq 1 ]; then
	    cat >> ${RULES_DIR}/${RULES_FILE} <<EOF
ACTION=="add", ENV{COLLECT_${CCW_CHAN_ID}}=="0", ATTR{[ccw/$CCW_CHAN_ID]use_diag}="1"
EOF
	fi
	cat >> ${RULES_DIR}/${RULES_FILE} <<EOF
ACTION=="add", ENV{COLLECT_${CCW_CHAN_ID}}=="0", ATTR{[ccw/$CCW_CHAN_ID]online}="1"
EOF
    fi
fi