kexec-tools/mkdumprd

#!/bin/bash --norc
# vim:sts=4:sw=4:ts=8:et

# mkinitrd
#
# Copyright 2005 Red Hat, Inc.
#
# Written by Erik Troan <ewt@redhat.com>
#
# Contributors:
#	Elliot Lee <sopwith@cuc.edu>
#	Miguel de Icaza <miguel@nuclecu.unam.mx>
#	Christian 'Dr. Disk' Hechelmann <drdisk@ds9.au.s.shuttle.de>
#	Michael K. Johnson <johnsonm@redhat.com>
#	Pierre Habraken <Pierre.Habraken@ujf-grenoble.fr>
#	Jakub Jelinek <jakub@redhat.com>
#	Carlo Arenas Belon (carenas@chasqui.lared.net.pe>
#	Keith Owens <kaos@ocs.com.au>
#	Bernhard Rosenkraenzer <bero@redhat.com>
#	Matt Wilson <msw@redhat.com>
#       Trond Eivind Glomsrød <teg@redhat.com>
#       Jeremy Katz <katzj@redhat.com>
#       Preston Brown <pbrown@redhat.com>
#	Bill Nottingham <notting@redhat.com>
#       Guillaume Cottenceau <gc@mandrakesoft.com>
#	Peter Jones <pjones@redhat.com>

umask 0022

export MALLOC_PERTURB_=204

PATH=/sbin:/usr/sbin:/bin:/usr/bin:$PATH
export PATH

. /etc/rc.d/init.d/functions

VERSION=5.0.39

PROBE="yes"
MODULES=""
PREMODS=""
DMRAIDS=""
MPATHS=""


[ -e /etc/sysconfig/mkinitrd ] && . /etc/sysconfig/mkinitrd

CONFMODS="$MODULES"
MODULES=""

withusb=yes
compress=1
allowmissing=""
target=""
kernel=""
force=""
verbose=""
img_vers=""
builtins=""
modulefile=/etc/modules.conf
rc=0

IMAGESIZE=8000
PRESCSIMODS="sd_mod"
fstab="/etc/fstab"

vg_list=""
net_list=""

vecho()
{
    NONL=""
    if [ "$1" == "-n" ]; then
        NONL="-n"
        shift
    fi
    [ -n "$verbose" ] && echo $NONL "$@"
}

error()
{
    NONL=""
    if [ "$1" == "-n" ]; then
        NONL="-n"
        shift
    fi
    echo $NONL "$@" >&2
}

usage () {
    if [ "$1" == "-n" ]; then
        cmd=echo
    else
        cmd=error
    fi

    $cmd "usage: `basename $0` [--version] [--help] [-v] [-d] [-f] [--preload <module>]"
    $cmd "       [--force-ide-probe] [--force-scsi-probe | --omit-scsi-modules]"
    $cmd "       [--image-version] [--force-scsi-probe | --omit-raid-modules]"
    $cmd "       [--with=<module>] [--force-lvm-probe | --omit-lvm-modules]"
    $cmd "       [--builtin=<module>] [--omit-dmraid]"
    $cmd "       [--fstab=<fstab>] [--nocompress] <initrd-image> <kernel-version>"
    $cmd ""
    $cmd "       (ex: `basename $0` /boot/initrd-2.2.5-15.img 2.2.5-15)"

    if [ "$1" == "-n" ]; then
        exit 0
    else
        exit 1
    fi
}

moduledep() {
    if [ ! -f "/lib/modules/$kernel/modules.dep" ]; then
	error "No dep file found for kernel $kernel"
	exit 1
    fi

    vecho -n "Looking for deps of module $1"
    deps=$(awk 'BEGIN { searched=ARGV[2]; ARGV[2]=""; rc=1 } \
                function modname(filename) { match(filename, /\/([^\/]+)\.k?o:?$/, ret); return ret[1] } \
                function show() { if (orig == searched) { print dep; orig=""; rc=0; exit } } \
                /^\/lib/ { show(); \
                           orig=modname($1); dep=""; \
                           if ($2) { for (i = 2; i <= NF; i++) { dep=sprintf("%s %s", dep, modname($i)); } } } \
                /^	/ { dep=sprintf("%s %s", dep, modname($1));  } \
                END      { show(); exit(rc) }' /lib/modules/$kernel/modules.dep $1)
    [ -n "$deps" ] && vecho ":$deps" || vecho
}

findone() {
    echo nash-find "$@" | /sbin/nash --force --quiet \
	| /bin/awk '{ print $1; exit; }'
}

findall() {
    echo nash-find "$@" | /sbin/nash --force --quiet
}

dm_get_uuid() {
    echo dm get_uuid "$1" | /sbin/nash --force --quiet
}

findmodule() {
    skiperrors=""

    if [ $1 == "--skiperrors" ]; then
	skiperrors=--skiperrors
	shift
    fi

    local modName=$1

    if [ "$modName" = "off" -o "$modName" = "null" ]; then
	return
    fi

    if [ $(echo $modName | cut -b1) = "-" ]; then
	skiperrors=--skiperrors
	modName=$(echo $modName | cut -b2-)
    fi

    case "$MODULES " in
        *"/$modName.ko "*) return ;;
    esac

    if echo $builtins | egrep -q '(^| )'$modName'( |$)' ; then
        vecho "module $modName assumed to be built in"
	return
    fi

    # special cases
    if [ "$modName" = "i2o_block" ]; then
	findmodule i2o_core
	findmodule -i2o_pci
	modName="i2o_block"
    elif [ "$modName" = "ppa" ]; then
	findmodule parport
	findmodule parport_pc
	modName="ppa"
    elif [ "$modName" = "sbp2" ]; then
	findmodule ieee1394
	findmodule ohci1394
	modName="sbp2"
    else
	moduledep $modName
	for i in $deps; do
	    findmodule $i
	done
    fi

    for modExt in o.gz o ko ; do
	for modDir in /lib/modules/$kernel/updates /lib/modules/$kernel ; do
	    if [ -d $modDir ]; then
		fmPath=$(findone $modDir -name $modName.$modExt)
	        if [ -f "$fmPath" ]; then
		    break 2
	        fi
	    fi
        done
    done

    if [ ! -f $fmPath ]; then
	if [ -n "$skiperrors" ]; then
	    return
	fi

        # ignore the absence of the scsi modules
	for n in $PRESCSIMODS; do
	    if [ "$n" = "$modName" ]; then
		return;
	    fi
	done;

	if [ -n "$allowmissing" ]; then
	    error "WARNING: No module $modName found for kernel $kernel, continuing anyway"
	    return
	fi

	error "No module $modName found for kernel $kernel, aborting."
	exit 1
    fi

    # only need to add each module once
    MODULES="$MODULES $fmPath"

    # need to handle prescsimods here -- they need to go _after_ scsi_mod
    if [ "$modName" = "scsi_mod" ]; then
	for n in $PRESCSIMODS ; do
	    findmodule $n
	done
    fi
}

finddmmods() {
    line=$(/sbin/dmsetup table "$1" 2>/dev/null)
    [ -z "$line" ] && return 1
    type=$(echo "$line" | awk '{ print $3 }')
    [ -z "$type" ] && return 1
    case "$type" in
    mirror)
        findmodule -dm-mirror
        ;;
    emc)
        findmodule -dm-emc
        findmodule -dm-round-robin
        ;;
    multipath)
        findmodule -dm-multipath
        findmodule -dm-round-robin
        ;;
    crypt)
        findmodule -dm-crypt
        ;;
    zero)
        findmodule -dm-zero
        ;;
    esac
}

inst() {
    if [ "$#" != "2" ];then
        echo "usage: inst <file> <destination>"
        return
    fi
    vecho "$1 -> $2"
    cp $1 $2
}

readlink() {
    echo nash-readlink "$1" | /sbin/nash --force --quiet
}

access() {
    echo nash-access -w $t | /sbin/nash --force --quiet
}

findstoragedriverinsys () {
    while [ ! -L device ]; do
        [ "$PWD" = "/sys" ] && return
        cd ..
    done
    cd $(readlink ./device)
    while [ ! -f modalias ]; do
        [ "$PWD" = "/sys/devices" ] && return
        cd ..
    done
    modalias=$(cat modalias)
    for driver in $(modprobe --set-version $kernel --show-depends $modalias 2>/dev/null| awk '{ print gensub(".*/","","g",$2) }') ; do
        findmodule ${driver%%.ko}
    done
}

findstoragedriver () {
    for device in $@ ; do
        case " $handleddevices " in
            *" $device "*)
                continue ;;
            *) handleddevices="$handleddevices $device" ;;
        esac
        if [[ "$device" =~ "md[0-9]+" ]]; then
            vecho "Found RAID component $device"
            handleraid "$device"
            continue
        fi
        vecho "Looking for driver for device $device"
        sysfs=$(findone -type d /sys/block -name $device)
        [ -z "$sysfs" ] && return
        pushd $sysfs >/dev/null 2>&1
        findstoragedriverinsys
        popd >/dev/null 2>&1
    done
}

findnetdriver() {
    for device in $@ ; do
        case " $handleddevices " in
            *" $device "*)
                continue ;;
            *) handleddevices="$handleddevices $device" ;;
        esac
        modalias=$(cat /sys/class/net/$device/device/modalias)
        for driver in $(modprobe --set-version $kernel --show-depends $modalias 2>/dev/null| awk '{ print gensub(".*/","","g",$2) }') ; do
            findmodule ${driver%%.ko}
        done
    done
}

handleraid() {
    local start=0

    if [ -n "$noraid" -o ! -f /proc/mdstat ]; then
        return 0
    fi

    levels=$(grep "^$1[	 ]*:" /proc/mdstat | \
        awk '{ print $4 }')
    devs=$(grep "^$1[	 ]*:" /proc/mdstat | \
        awk '{ print gensub("\\[[0-9]*\\]","","g",gensub("^md.*raid[0-9]*","","1")) }')

    for level in $levels ; do
	case $level in
	linear)
	    findmodule linear
	    start=1
	    ;;
	multipath)
	    findmodule multipath
	    start=1
	    ;;
	raid[01456] | raid10)
	    findmodule $level
	    start=1
	    ;;
	*)
	    error "raid level $level (in /proc/mdstat) not recognized"
	    ;;
	esac
    done
    findstoragedriver $devs
    if [ "$start" = 1 ]; then
        raiddevices="$raiddevices $1"
    fi
    return $start
}

handlelvordev() {
    local vg=`lvs --noheadings -o vg_name $1 2>/dev/null`
    if [ -n "$vg" ]; then
        vg=`echo $vg` # strip whitespace
        case " $vg_list " in
        *" $vg "*)
            ;;
        *)
            vg_list="$vg_list $vg"
            for device in `vgdisplay -v $vg 2>/dev/null | sed -n 's/PV Name//p'`; do
                findstoragedriver ${device##/dev/}
            done
            ;;
        esac
    else
        findstoragedriver ${1##/dev/}
    fi
}

handlenetdev() {
    local dev=$1

    source /etc/sysconfig/network
    if [ ! -f /etc/sysconfig/network-scripts/ifcfg-$dev ]; then
	error "unable to find network device configuration for $dev"
    fi
    source /etc/sysconfig/network-scripts/ifcfg-$dev
    [ -n  "$BOOTPROTO" ] || error "bootproto not specified for $dev"

    findnetdriver $dev
    [ -n "$IPADDR" ] && IPSTR="$IPSTR --ip $IPADDR"
    [ -n "$NETMASK" ] && IPSTR="$IPSTR --netmask $NETMASK"
    [ -n "$GATEWAY" ] && IPSTR="$IPSTR --gateway $GATEWAY"
    [ -n "$ETHTOOL_OPTS" ] && IPSTR="$IPSTR --ethtool \"$ETHTOOL_OPTS\""
    [ -n "$MTU" ] && IPSTR="$IPSTR --mtu $MTU"
    if [ -n "$IPADDR" ]; then
	[ -z "$DOMAIN" ] && DOMAIN=$(awk '/^search / { print gensub("^search ","",1) }' /etc/resolv.conf)
	if [ -z "$DNS1" ]; then
	    DNS1=$(awk '/^nameserver / { ORS="" ; if (x > 0) print "," ; printf "%s", $2 ; x = 1}' /etc/resolv.conf)
	fi
    fi
    [ -n "$DOMAIN" ] && IPSTR="$IPSTR --domain \"$DOMAIN\""
    if [ -n "$DNS1" ]; then
        if [ -n "$DNS2" ]; then
	    IPSTR="$IPSTR --dns $DNS1,$DNS2"
	else
	    IPSTR="$IPSTR --dns $DNS1"
	fi
    fi
    network="network --device $dev --bootproto $BOOTPROTO $IPSTR"
}

while [ $# -gt 0 ]; do
    case $1 in
	--fstab*)
	    if echo $1 | grep -q '=' ; then
	    	fstab=`echo $1 | sed 's/^--fstab=//'`
	    else
		fstab=$2
		shift
	    fi
	    ;;

	--with-usb)
	    withusb=yes
	    ;;

        --without-usb)
            withusb=no
            ;;

	--with*)
	    if echo $1 | grep -q '=' ; then
	    	modname=`echo $1 | sed 's/^--with=//'`
	    else
		modname=$2
		shift
	    fi

	    basicmodules="$basicmodules $modname"
	    ;;

	--builtin*)
	    if echo $1 | grep -q '=' ; then
	    	modname=`echo $1 | sed 's/^--builtin=//'`
	    else
		modname=$2
		shift
	    fi
	    builtins="$builtins $modname"
	    ;;

	--version)
	    echo "mkinitrd: version $VERSION"
	    exit 0
	    ;;

	-v)
	    verbose=-v
	    ;;

	--nocompress)
	    compress=""
	    ;;

	--ifneeded)
	    # legacy
	    ;;

	-f)
	    force=1
	    ;;
    
        -d)
            KDUMP_CONFIG_FILE=""
            if [ -f /etc/kdump.conf ]; then
                KDUMP_CONFIG_FILE="/etc/kdump.conf"
            fi
            ;;

	--preload*)
	    if echo $1 | grep -q '=' ; then
	    	modname=`echo $1 | sed 's/^--preload=//'`
	    else
		modname=$2
		shift
	    fi
	    PREMODS="$PREMODS $modname"
	    ;;
	--force-scsi-probe)
	    forcescsi=1
	    ;;
	--omit-scsi-modules)
	    PRESCSIMODS=""
	    noscsi=1
	    ;;
	--force-raid-probe)
	    forceraid=1
	    ;;
	--omit-raid-modules)
	    noraid=1
	    ;;
	--force-lvm-probe)
	    forcelvm=1
	    ;;
	--omit-lvm-modules)
	    nolvm=1
	    ;;
	--omit-dmraid)
	    nodmraid=1
            ;;
        --force-ide-probe)
            forceide=1
            ;;
	--image-version)
	    img_vers=yes
	    ;;
	--allow-missing)
	    allowmissing=yes
	    ;;
	--noresume)
	    noresume=1
	    ;;
        --help)
            usage -n
            ;;
	*)
	    if [ -z "$target" ]; then
		target=$1
	    elif [ -z "$kernel" ]; then
		kernel=$1
	    else
		usage
	    fi
	    ;;
    esac

    shift
done

if [ -z "$target" -o -z "$kernel" ]; then
    usage
fi

if [ -n "$img_vers" ]; then
    target="$target-$kernel"
fi

if [ -z "$force" -a -f $target ]; then
    error "$target already exists."
    exit 1
fi

if [ -n "$forcescsi" -a -n "$noscsi" ]; then
    error "Can't both force scsi probe and omit scsi modules"
    exit 1
fi

if [ -n "$forceraid" -a -n "$noraid" ]; then
    error "Can't both force raid probe and omit raid modules"
    exit 1
fi

if [ -n "$forcelvm" -a -n "$nolvm" ]; then
    error "Can't both force LVM probe and omit LVM modules"
    exit 1
fi

if [ ! -d /lib/modules/$kernel ]; then
    error 'No modules available for kernel "'${kernel}'".'
    exit 1
fi

if [ $UID != 0 ]; then
    error "mkinitrd must be run as root."
    exit 1
fi

vecho "Creating initramfs"
modulefile=/etc/modprobe.conf

# find a temporary directory which doesn't use tmpfs
TMPDIR=""
for t in /tmp /var/tmp /root ${PWD}; do
    if [ ! -d $t ]; then continue; fi
    if ! access -w $t ; then continue; fi

    fs=$(df -T $t 2>/dev/null | awk '{line=$1;} END {printf $2;}')
    if [ "$fs" != "tmpfs" ]; then
	TMPDIR=$t
	break
    fi
done

if [ -z "$TMPDIR" ]; then
    error "no temporary directory could be found."
    exit 1
fi

if [ $TMPDIR = "/root" -o $TMPDIR = "${PWD}" ]; then
    error "WARNING: using $TMPDIR for temporary files"
fi

for n in $PREMODS; do
	findmodule $n
done

needusb=""
if [ -n "$withusb" -a "x$PROBE" == "xyes" ]; then
    # If / or /boot is on a USB device include the driver. With root by
    # label we could still get some odd behaviors
    for fs in / /boot ; do
        esc=$(echo $fs | sed 's,/,\\/,g')
        dev=$(mount | awk "/ on ${esc} / { print \$1 }" | sed 's/[0-9]*$//' | cut -d/ -f3)
        if [ "$(echo $dev | cut -c1-2)" = sd ]; then
            if [ `which kudzu 2>/dev/null` ]; then
                host=$(kudzu --probe -b scsi |
                gawk '/^device: '${dev}'/,/^host:/ { if (/^host/) { print $2; exit; } }')
                if [ -d /proc/scsi/usb-storage-${host} -o -f /proc/scsi/usb-storage/${host} ]; then
                    needusb=1
                fi
            fi
        fi
    done
fi

if [ -n "$needusb" -a "x$PROBE" == "xyes" ]; then
    drivers=$(awk '/^alias[[:space:]]+usb-controller[0-9]* / { print $3}' < $modulefile)
    useUSB=0
    if [ -n "$drivers" ]; then
        useUSB=1
        for driver in $drivers; do
            findmodule $driver
        done
    fi
    for x in $(grep ^[eou]hci_hcd /proc/modules | awk '{ print $1 }' | tac) ; do
        useUSB=1
        findmodule $(echo $x | sed 's/_/-/')
    done
    if [ "$useUSB" == "1" ]; then
        findmodule scsi_mod
        findmodule sd_mod
        findmodule usb-storage
    fi
fi

if [ -n "$forcescsi" -o -z "$noscsi" -a "x$PROBE" == "xyes" ]; then
    if [ ! -f $modulefile ]; then
        modulefile=/etc/conf.modules
    fi

    if [ -f $modulefile ]; then
	scsimodules=`grep "alias[[:space:]]\+scsi_hostadapter" $modulefile | grep -v '^[ 	]*#' | LC_ALL=C sort -u | awk '{ print $3 }'`

	if [ -n "$scsimodules" ]; then
            for n in $scsimodules; do
    # for now allow scsi modules to come from anywhere.  There are some
    # RAID controllers with drivers in block/
		findmodule $n
	    done
	fi
    fi
fi

# If we have ide devices and module ide, do the right thing
ide=/proc/ide/ide*
if [ -n "$forceide" -o -n "$ide" -a "x$PROBE" == "xyes" ]; then
    findmodule -ide-disk
fi

# If we have dasd devices, include the necessary modules (S/390)
if [ "x$PROBE" == "xyes" -a -d /proc/dasd ]; then
    findmodule -dasd_mod
    findmodule -dasd_eckd_mod
    findmodule -dasd_fba_mod
fi

if [ "x$PROBE" == "xyes" ]; then
    rootfs=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $3; }}' $fstab)
    rootopts=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $4; }}' $fstab)

    # in case the root filesystem is modular
    findmodule -${rootfs}

    rootdev=$(awk '/^[ \t]*[^#]/ { if ($2 == "/") { print $1; }}' $fstab)
    # check if it's nfsroot
    if [ "$rootfs" == "nfs" ]; then
	remote=$(echo $rootdev | cut -d : -f 1)
	# FIXME: this doesn't handle ips properly
	remoteip=$(host $remote | cut -d ' ' -f 4) 
	netdev=`/sbin/ip route get to $remoteip |sed 's|.*dev \(.*\).*|\1|g' |awk {'print $1;'} |head -n 1`	
	net_list="$net_list $netdev"
    # check if it's root by label
    elif echo $rootdev | cut -c1-6 | grep -q "LABEL=" ; then
    	rootopts=$(echo $rootopts | sed -e 's/^r[ow],//' -e 's/,r[ow],$//' -e 's/,r[ow],/,/' \
                     -e 's/^r[ow]$/defaults/' -e 's/$/,ro/')
        majmin=$(get_numeric_dev dec /dev/root)
        if [ -n "$majmin" ]; then
            dev=$(findall /sys/block -name dev | while read device ; do \
	          echo "$majmin" | cmp -s $device && echo $device ; done \
	          | sed -e 's,.*/\([^/]\+\)/dev,\1,' )
	    if [ -n "$dev" ]; then
                vecho "Found root device $dev for $rootdev"
                rootdev=$dev
	    fi
        fi
    else
    	rootopts=$(echo $rootopts | sed -e 's/^r[ow],//' -e 's/,r[ow],$//' -e 's/,r[ow],/,/' \
                     -e 's/^r[ow]$/defaults/' -e 's/$/,ro/')
    fi
    [ "$rootfs" != "nfs" ] && handlelvordev $rootdev

    # find the first swap dev which would get used for swsusp
    swsuspdev=$(awk '/^[ \t]*[^#]/ { if ($3 == "swap") { print $1; }}' $fstab \
                | head -n 1)
    if ! echo $swsuspdev | cut -c1-6 | grep -q "LABEL=" ; then
        handlelvordev $swsuspdev
    fi
fi

# If we use LVM or dm-based raid, include dm-mod
# XXX: dm not really supported yet.
testdm=""
[ -n "$vg_list" ] && testdm="yes"
[ -n "$forceraid" -o -n "$forcelvm" ] && testdm="yes"
[ -z "$nolvm" -o -z "$noraid" ] && testdm="yes"
[ "x$PROBE" != "xyes" ] && testdm=""

if [ -n "$testdm" ]; then
    if [ -x /sbin/dmsetup -a -e /dev/mapper/control ]; then
	dmout=$(/sbin/dmsetup ls 2>/dev/null)
	if [ "$dmout" != "No devices found" -a "$dmout" != "" ]; then
	    findmodule -dm-mod

            # DM requires all of these to be there in case someone used the
            # feature.  broken.  (#132001)
            findmodule -dm-mirror
            findmodule -dm-zero
            findmodule -dm-snapshot
	fi
    fi
    if [ -x /sbin/dmraid -a -z "$nodmraid" ]; then
        for raid in $(/sbin/dmraid -s -craidname 2>/dev/null | grep -vi "no raid disks" ) ; do
            dmname=$(resolve_dm_name $raid)
            if [ -n "$dmname" ]; then
                DMRAIDS="$DMRAIDS $dmname"
            fi
        done
    fi
fi
	    
for n in $basicmodules; do
    findmodule $n
done

for n in $CONFMODS; do
    findmodule $n
done

finddmmods

vecho "Using modules:$MODULES"

MNTIMAGE=`mktemp -d ${TMPDIR}/initrd.XXXXXX`
IMAGE=`mktemp ${TMPDIR}/initrd.img.XXXXXX`
RCFILE=$MNTIMAGE/init

cemit()
{
    cat >> $RCFILE
}

emit()
{
    NONL=""
    if [ "$1" == "-n" ]; then
        NONL="-n"
        shift
    fi
    echo $NONL "$@" >> $RCFILE
}

emitdm()
{
    vecho "Adding dm map \"$1\""
    UUID=$(dm_get_uuid "$1")
    if [ -n "$UUID" ]; then
        UUID="--uuid $UUID"
    fi
    emit dm create "$1" $UUID $(/sbin/dmsetup table "$1")
}

emitdms()
{
    [ -z "$MPATHS" -a -z "$DMRAIDS" ] && return 0
    echo dm list $MPATHS $DMRAIDS | nash --force --quiet | \
            while read ACTION NAME ; do
        case $ACTION in
        rmparts)
            emit rmparts "$NAME"
            ;;
        create)
            emitdm "$NAME"
            ;;
        part)
            emit dm partadd "$NAME"
            ;;
        esac
    done
}

if [ -z "$MNTIMAGE" -o -z "$IMAGE" ]; then
    error "Error creating temporaries.  Try again"
    exit 1
fi

if [ -n "$KDUMP_CONFIG_FILE" ]; then
    while read type location; do

        case "$type" in
        net)
            #grab remote host and xlate into numbers
            rhost=`echo $location | sed 's/.*@//' | cut -d':' -f1`
            need_dns=`echo $rhost|grep [a-zA-Z]`
            [ -n "$need_dns" ] && rhost=`host $rhost|cut -d' ' -f4`

            #find ethernet device used to route to remote host, ie eth0
            netdev=`/sbin/ip route get to $rhost 2>&1`
            [ $? != 0 ] && echo "Bad kdump location: $location" && continue
            netdev=`echo $netdev|awk '{print $3;}'|head -n 1`
           
            #add the ethernet device to the list of modules 
            handlenetdev $netdev

            #load nfs modules, if needed 
            echo $location | grep -v "@" > /dev/null && findmodule nfs
            ;;
        *)
            ;;
        esac

    done < $KDUMP_CONFIG_FILE
fi

mkdir -p $MNTIMAGE
mkdir -p $MNTIMAGE/lib
mkdir -p $MNTIMAGE/bin
mkdir -p $MNTIMAGE/etc
mkdir -p $MNTIMAGE/dev
mkdir -p $MNTIMAGE/proc
mkdir -p $MNTIMAGE/sys
mkdir -p $MNTIMAGE/sysroot
ln -s bin $MNTIMAGE/sbin

if [ -e /etc/fstab.sys ]; then
    inst /etc/fstab.sys "$MNTIMAGE/etc/fstab.sys"
fi
inst /sbin/nash "$MNTIMAGE/bin/nash"
inst /sbin/insmod.static "$MNTIMAGE/bin/insmod"
ln -s /sbin/nash $MNTIMAGE/sbin/modprobe

for MODULE in $MODULES; do
    if [ -x /usr/bin/strip ]; then
	/usr/bin/strip -g $verbose $MODULE -o $MNTIMAGE/lib/$(basename $MODULE)
    else
	cp $verbose -a $MODULE $MNTIMAGE/lib
    fi
done

# mknod'ing the devices instead of copying them works both with and
# without devfs...
mkdir $MNTIMAGE/dev/mapper

mknod $MNTIMAGE/dev/ram0 b 1 0
mknod $MNTIMAGE/dev/ram1 b 1 1
ln -sf ram1 $MNTIMAGE/dev/ram

mknod $MNTIMAGE/dev/null c 1 3
mknod $MNTIMAGE/dev/zero c 1 5
mknod $MNTIMAGE/dev/systty c 4 0
for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 ; do
    mknod $MNTIMAGE/dev/tty$i c 4 $i
done
for i in 0 1 2 3 ; do
    mknod $MNTIMAGE/dev/ttyS$i c 4 $(($i + 64))
done
mknod $MNTIMAGE/dev/tty c 5 0
mknod $MNTIMAGE/dev/console c 5 1
mknod $MNTIMAGE/dev/ptmx c 5 2
mknod $MNTIMAGE/dev/rtc c 10 135
if [ "$(uname -m)" == "ia64" ]; then
    mknod $MNTIMAGE/dev/efirtc c 10 136
fi

# FIXME -- this can really go poorly with clvm or duplicate vg names.
# nash should do lvm probing for us and write its own configs.
if [ -n "$vg_list" ]; then
    inst /sbin/lvm.static "$MNTIMAGE/bin/lvm"
    if [ -f /etc/lvm/lvm.conf ]; then
	cp $verbose --parents /etc/lvm/lvm.conf $MNTIMAGE/
    fi
fi

echo -n >| $RCFILE
cemit << EOF
#!/bin/nash

mount -t proc /proc /proc
setquiet
echo Mounting proc filesystem
echo Mounting sysfs filesystem
mount -t sysfs /sys /sys
echo Creating /dev
mount -o mode=0755 -t tmpfs /dev /dev
mkdir /dev/pts
mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts
mkdir /dev/shm
mkdir /dev/mapper
echo Creating initial device nodes
mknod /dev/null c 1 3
mknod /dev/zero c 1 5
mknod /dev/systty c 4 0
mknod /dev/tty c 5 0
mknod /dev/console c 5 1
mknod /dev/ptmx c 5 2
mknod /dev/rtc c 10 135
EOF
if [ "$(uname -m)" == "ia64" ]; then
    emit "mknod $MNTIMAGE/dev/efirtc c 10 136"
fi

# XXX really we need to openvt too, in case someting changes the
# color palette and then changes vts on fbcon before gettys start.
# (yay, fbcon bugs!)
for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 ; do
    emit "mknod /dev/tty$i c 4 $i"
done

for i in 0 1 2 3 ; do
    emit "mknod /dev/ttyS$i c 4 $(($i + 64))"
done

emit "echo Setting up hotplug."
emit "hotplug"

emit "echo Creating block device nodes."
emit "mkblkdevs"

for MODULE in $MODULES; do
    text=""
    module=`echo $MODULE | sed "s|.*/||" | sed "s/.k\?o$//"`
    fullmodule=`echo $MODULE | sed "s|.*/||"`

    options=`sed -n -e "s/^options[ 	][ 	]*$module[ 	][ 	]*//p" $modulefile 2>/dev/null`

    if [ -n "$options" ]; then
        vecho "Adding module $module$text with options $options"
    else
        vecho "Adding module $module$text"
    fi
    emit "echo \"Loading $fullmodule module\""
    emit "insmod /lib/$fullmodule $options"

    # Hack - we need a delay after loading usb-storage to give things
    #        time to settle down before we start looking a block devices
    if [ "$module" = "usb-storage" ]; then
	emit "echo Waiting 8 seconds for driver initialization."
	emit "sleep 8"
    fi
    if [ "$module" = "zfcp" -a -f /etc/zfcp.conf ]; then
	emit "echo Waiting 2 seconds for driver initialization."
        emit "sleep 2"
        cat /etc/zfcp.conf | grep -v "^#" | tr "A-Z" "a-z" | while read DEVICE SCSIID WWPN SCSILUN FCPLUN; do
        cemit <<EOF 
echo -n $WWPN > /sys/bus/ccw/drivers/zfcp/${DEVICE/0x/}/port_add
echo -n $FCPLUN > /sys/bus/ccw/drivers/zfcp/${DEVICE/0x/}/$WWPN/unit_add
echo -n 1 > /sys/bus/ccw/drivers/zfcp/${DEVICE/0x/}/online
EOF
        done
    fi
done

if [ -n "$vg_list" ]; then
    emit "echo Making device-mapper control node"
    emit "mkdmnod"
fi

if [ -n "$net_list" ]; then
    for netdev in $net_list; do 
	emit "echo Bringing up $netdev"
	handle_netdev $netdev
	emit $network
    done
fi

# HACK: module loading + device creation isn't necessarily synchronous...
# this will make sure that we have all of our devices before trying
# things like RAID or LVM
emit "mkblkdevs"

emitdms

if [ -n "$raiddevices" ]; then
    for dev in $raiddevices; do
	cp -a /dev/${dev} $MNTIMAGE/dev
	emit "raidautorun /dev/${dev}"
    done
fi

if [ -n "$vg_list" ]; then
    emit "echo Scanning logical volumes"
    emit "lvm vgscan --ignorelockingfailure"
    emit "echo Activating logical volumes"
    emit "lvm vgchange -ay --ignorelockingfailure $vg_list"
fi

if [ -z "$noresume" -a -n "$swsuspdev" ]; then
    emit "resume $swsuspdev"
fi

kdump_chk()
{
    rc=`eval $1` && return $rc
    echo "$KDUMP_CONFIG_FILE: $2"
    exit 1
}

if [ -n "$KDUMP_CONFIG_FILE" ]; then
    memtotal=`cat /proc/meminfo | grep MemTotal | awk '{print $2}'`
    
    #timezone info for date which outputs YYYY-MM-DD-hh:mm
    cp /etc/localtime $MNTIMAGE/etc/localtime
    bin="/sbin/reboot /sbin/kcp"
    
    #traverse the config file and setup each dump location
    while read type location; do
            [ -z "$type" ] && continue  #skip empty lines
            [ "`echo $type| grep ^# `" ] && continue #skip comments
            kdump_chk "test -n \"$location\"" "Need a location for $type"

            case "$type" in
                \#*) continue;;    #skip comments

                raw)
                    #test raw partition
                    kdump_chk "dd if=$location count=1 of=/dev/null > /dev/null 2>&1" \
                               "Bad raw partition $location"
                    #TODO check for available size is greater than $memtotal

                    #setup raw case
                    emit "echo Saving to partition $location"
                    emit "dd if=/proc/vmcore of=$location"
                    emit "cond reboot -h -f"
                    bin="$bin /bin/dd"
                    ;;

                net)
                    #grab remote host and xlate into numbers
                    rhost=`echo $location | sed 's/.*@//' | cut -d':' -f1`
                    need_dns=`echo $rhost|grep [a-zA-Z]`
                    [ -n "$need_dns" ] && rhost=`host $rhost|cut -d' ' -f4`

                    #find the local ip being used as a route to remote ip
                    netdev=`/sbin/ip route get to $rhost 2>&1`
                    [ $? != 0 ] && echo "Bad kdump location: $location" && continue
                    lhost=`echo $netdev|awk '{print $5;}'|head -n 1`
           
                    emit "echo Saving to remote location $location"
                    if [ -z "`echo $location|grep @`" ]; then
                        #NFS path

                        #test nfs mount and directory creation
                        rlocation=`echo $location| sed 's/.*:/'"$rhost"':/'`
                        tmnt=`mktemp -dq`
                        kdump_chk "mount -t nfs -o nolock $rlocation $tmnt" \
                                   "Bad NFS mount $location"
                        mkdir -p /mnt/var/crash
                        tdir=`mktemp -dqp /mnt/var/crash`

                        rc=$? && rm -rf $tdir && umount $tmnt && rm -rf $tmnt
                        if [ $rc != "0" ]; then 
                            echo "Cannot create directory in $location: var/crash"
                            exit 1 
                        fi
                        #TODO check for available size is greater than $memtotal
    
                        #setup nfs case
                        mkdir -p $MNTIMAGE/mnt
                        emit "mount -t nfs -o nolock $rlocation /mnt"
                        emit "cond kcp /proc/vmcore /mnt/var/crash/$lhost-%DATE/vmcore"
                        emit "cond reboot -h -f"
                    else
                        #SSH path
           
                        #rebuild $location replacing machine name with ip address
                        rlocation=`echo $location|sed 's/@.*/@'"$rhost"'/'`
                        #test ssh path and directory creation
                        s_opts="-o BatchMode=yes -o StrictHostKeyChecking=no"
                        kdump_chk "ssh -q $s_opts $rlocation mkdir -p /var/crash/ </dev/null" \
                                   "Could not create $location:/var/crash, check ssh keys"
                        tdir=`ssh -q $s_opts $rlocation mktemp -dqp /var/crash </dev/null`
                        if [ $? != "0" ]; then
                            echo "$KDUMP_CONFIG_FILE: Could not create temp directory in $location:/var/crash"
                            exit 1
                        fi
                        ssh -q $s_opts $rlocation rm -rf $tdir </dev/null
                        #TODO check for available size is greater than $memtotal

                        #setup ssh case, quick check to see if setup already
                        if [ ! -r $MNTIMAGE/dev/urandom ]; then
                            #only need to do these once
                            grep "^root" /etc/passwd > $MNTIMAGE/etc/passwd
                            mkdir -p $MNTIMAGE/root
                            cp -a /root/.ssh $MNTIMAGE/root/
                            cp -a /etc/ssh $MNTIMAGE/etc
                            mknod $MNTIMAGE/dev/urandom c 1 9
                            emit "mknod /dev/urandom c 1 9"
                        fi
                        emit "dd if=/dev/mem of=/dev/urandom count=1 bs=512 skip=100" 
                        emit "cond kcp --ssh $rlocation:/var/crash/$lhost-%DATE/vmcore"
                        emit "cond kcp --ssh /proc/vmcore"
                        emit "cond reboot -h -f"
                        bin="$bin /usr/bin/scp /usr/bin/ssh /bin/dd"
                        
                        #ssh, scp require libraries that aren't found with ldd
                        lib=/lib && [ -d "/lib64" ] && lib=/lib64
                        k_extras="/$lib/libnss_compat.so.2 /$lib/libnss_files.so.2"
                    fi
                    ;;
                default)
                    [ "$location" == "reboot" ] && emit "reboot -h -f"
                    #else load normally on default failure case
                    ;;
                *)
                    #test filesystem and directory creation
                    kdump_chk "test -f /sbin/fsck.$type" "Unsupported type $type"
                    kdump_chk "mount -t $type $location /mnt" "Bad mount point $location"
                    mkdir -p /mnt/var/crash
                    tdir=`mktemp -dqp /mnt/var/crash/`
                    rc=$? && rm -rf $tdir && umount /mnt
                    if [ $rc != "0" ]; then 
                        echo "Cannot create directory in $location: /var/crash"
                        exit 1
                    fi
                    #TODO check for available size is greater than $memtotal
    
                    #setup filesystem case
                    lhost="127.0.0.1"
                    mkdir -p $MNTIMAGE/mnt
		    touch $MNTIMAGE/etc/mtab
                    emit "echo Saving to the local filesystem $location"
                    emit "fsck.$type $location"
                    emit "cond mount -t $type $location /mnt"
                    emit "cond kcp /proc/vmcore /mnt/var/crash/$lhost-%DATE/vmcore"
                    emit "cond umount /mnt"
                    emit "cond reboot -h -f"
                    bin="$bin /sbin/fsck.$type /bin/mount"
                    ;;
            esac
    done < $KDUMP_CONFIG_FILE

    #find the shared libraries.  this snippet taken from kboot
    kdump_libs=`for n in $bin; do 
        ldd "$n" 2>/dev/null | tr -s '\011' ' ' | 
        sed 's/.*=> *//;s/^ *//;/ *(0x.*)/s///p;d' 
    done | sort | uniq | sed '/^ *$/d'`

    #copy the binaries and their shared libraries to the archive
    for n in $bin $kdump_libs $k_extras; do
        mkdir -p $MNTIMAGE/`dirname $n`
        cp $n $MNTIMAGE/$n
    done
fi

emit "echo Creating root device."
# mkrootdev does "echo /dev/root /sysroot ext3 defaults,ro 0 0 >/etc/fstab"
emit "mkrootdev -t $rootfs -o $rootopts $rootdev"
rootdev=/dev/root

emit "echo Mounting root filesystem."
emit "mount /sysroot"

emit "echo Setting up other filesystems."
emit "setuproot"

emit "echo Switching to new root and running init."
emit "switchroot"

chmod +x $RCFILE

(cd $MNTIMAGE; findall . | cpio --quiet -c -o) >| $IMAGE || exit 1

if [ -n "$compress" ]; then
    gzip -9 < $IMAGE >| $target || rc=1
else
    cp -a $IMAGE $target || rc=1
fi
rm -rf $MNTIMAGE $IMAGE
if [ -n "$MNTPOINT" ]; then rm -rf $MNTPOINT ; fi

exit $rc