#!/bin/sh
log_label="xcat.dracut_033"

NEWROOT=$3
RWDIR=.statelite

. /lib/dracut-lib.sh
XCAT="$(getarg XCAT=)"
XCATMASTER=$XCAT
STATEMNT="$(getarg STATEMNT=)"
rootlimit="$(getarg rootlimit=)"
xcatdebugmode="$(getarg xcatdebugmode=)"

[ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "in dracut, executing xcatroot..."
getarg nonodestatus
NODESTATUS=$?

MASTER=`echo $XCATMASTER |awk -F: '{print $1}'`
XCATIPORT="$(getarg XCATIPORT=)"
if [ $? -ne 0 ]; then
    XCATIPORT="3002"
fi

[ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "MASTER=$MASTER XCATIPORT=$XCATIPORT NODESTATUS=$NODESTATUS"

if [ "$NODESTATUS" != "0" ]; then
[ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Reporting installstatus=netbooting..."
    /tmp/updateflag $MASTER $XCATIPORT "installstatus netbooting"
fi


imgurl="$(getarg imgurl=)";
if [ ! -z "$imgurl" ]; then
    if [ xhttp = x${imgurl%%:*} ]; then
        NFS=0
        FILENAME=${imgurl##*/}
        while [ ! -r "$FILENAME" ]; do
            [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Downloading $imgurl..."
            echo Getting $imgurl...
            if ! wget -nv $imgurl; then
                [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Downloading $imgurl FAILED, retrying..."
                rm -f $FILENAME
                sleep 27
            fi
        done
        [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Download complete."
    elif [ xnfs = x${imgurl%%:*} ]; then
        NFS=1
        SERVER=${imgurl#nfs:}
        SERVER=${SERVER#/}
        SERVER=${SERVER#/}
        ROOTDIR=$SERVER
        SERVER=${SERVER%%/*}
        SERVER=${SERVER%:}
        ROOTDIR=/${ROOTDIR#*/} 
    fi
fi
#echo 0 > /proc/sys/vm/zone_reclaim_mode #Avoid kernel bug

if [ -r /rootimg.sfs ]; then
    echo Setting up squashfs with ram overlay.
    mknod /dev/loop0 b 7 0
    mkdir -p /ro
    mkdir -p /rw
    mount -t squashfs /rootimg.sfs /ro
    mount -t tmpfs rw /rw
    mount -t aufs -o dirs=/rw:/ro mergedroot $NEWROOT
    mkdir -p $NEWROOT/ro
    mkdir -p $NEWROOT/rw
    mount --move /ro $NEWROOT/ro
    mount --move /rw $NEWROOT/rw
elif [ -r /rootimg.cpio.gz ] || [ -r /rootimg.cpio.xz ]; then
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Downloaded rootimg.cpio.[gz/xz]...Setting up RAM-root tmpfs."
    echo Setting up RAM-root tmpfs.
    if [ -z $rootlimit ];then
        mount -t tmpfs -o mode=755 rootfs $NEWROOT
    else
        mount -t tmpfs -o mode=755,size=$rootlimit rootfs $NEWROOT
    fi

    cd $NEWROOT
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Extracting the root filesystem..."
    echo "Extracting the root filesystem..."
    if [ -r /rootimg.cpio.gz ]; then
        if [ -x /bin/cpio ]; then
            gzip -cd /rootimg.cpio.gz |/bin/cpio -idum
        else
            gzip -cd /rootimg.cpio.gz |cpio -idum
        fi
    elif [ -r /rootimg.cpio.xz ]; then
        if [ -x /bin/cpio ]; then
            xz -cd /rootimg.cpio.xz |/bin/cpio -idum
        else
            xz -cd /rootimg.cpio.xz |cpio -idum
        fi
    fi
    $NEWROOT/etc/init.d/localdisk
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Done extracting the root filesystem..."
    echo "Done extracting the root filesystem..."
elif [ -r /rootimg.tar.gz ] || [ -r /rootimg.tar.xz ]; then
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Downloaded rootimg.tar.[gz/xz]...Setting up RAM-root tmpfs."
    echo Setting up RAM-root tmpfs.
    if [ -z $rootlimit ];then
        mount -t tmpfs -o mode=755 rootfs $NEWROOT
    else
        mount -t tmpfs -o mode=755,size=$rootlimit rootfs $NEWROOT
    fi

    cd $NEWROOT
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Extracting the root filesystem..."
    echo "Extracting the root filesystem..."
    if [ -r /rootimg.tar.gz ]; then
        tar --selinux --xattrs-include='*' -zxf /rootimg.tar.gz
        if [ $? -ne 0 ]; then
            tar --selinux -zxf /rootimg.tar.gz
        fi
    elif [ -r /rootimg.tar.xz ]; then
        tar --selinux --xattrs-include='*' -Jxf /rootimg.tar.xz
        if [ $? -ne 0 ]; then
            tar --selinux -Jxf /rootimg.tar.xz
        fi
    fi
    $NEWROOT/etc/init.d/localdisk
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Done extracting the root filesystem."
    echo "Done extracting the root filesystem."
elif [ -r /rootimg-statelite.gz ]; then
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Setting up RAM-root tmpfs for statelite mode."
    echo Setting up RAM-root tmpfs for statelite mode.
 
    if [ -z $rootlimit];then
        mount -t tmpfs -o mode=755 rootfs $NEWROOT
    else
        mount -t tmpfs -o mode=755,size=$rootlimit rootfs $NEWROOT
    fi

    cd $NEWROOT
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Extracting the root filesystem..."
    echo "Extracting root filesystem..."
    if [ -x /bin/cpio ]; then
        gzip -cd /rootimg-statelite.gz |/bin/cpio -idum
    else
        gzip -cd /rootimg-statelite.gz |cpio -idum
    fi
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Done extracting the root filesystem."
    echo "Done extracting the root filesystem."
    # then, the statelite staffs will be processed
    echo Setting up Statelite 
    modprobe nfs
    MAXTRIES=7
    ITER=0
    if [ ! -e "$NEWROOT/$RWDIR" ]; then
        echo ""
        echo "The /$RWDIR directory doesn't exist in the rootimg... "
        echo ""
        /bin/sh
    fi

    if [ ! -e "$NEWROOT/etc/init.d/statelite" ]; then
        echo ""
        echo "$NEWROOT/etc/init.d/statelite doesn't exist... "
        echo ""
        /bin/sh
    fi

    mount -t tmpfs rw $NEWROOT/$RWDIR
    mkdir -p $NEWROOT/$RWDIR/tmpfs
    ME=`hostname -s`
    if [ ! -z $NODE ]; then
        ME=$NODE
    fi


    # mount the SNAPSHOT directory here for persistent use.
    if [ ! -z $STATEMNT ]; then
        SNAPSHOTSERVER=${STATEMNT%:*}
        SNAPSHOTROOT=${STATEMNT#*/}
        if [ -z $SNAPSHOTROOT ]; then
            SNAPSHOTROOT=$SNAPSHOTSERVER
            SNAPSHOTSERVER=
        fi
    fi

    if [ ! -z $SNAPSHOTSERVER ]; then
        mkdir -p $NEWROOT/$RWDIR/persistent
        MAXTRIES=5
        ITER=0
        if [ -z $MNTOPTS ]; then
            MNT_OPTIONS="nolock,rsize=32768,tcp,nfsvers=3,timeo=14"
        else
            MNT_OPTIONS=$MNTOPTS
        fi
        while ! mount $SNAPSHOTSERVER:/$SNAPSHOTROOT $NEWROOT/$RWDIR/persistent -o $MNT_OPTIONS; do
            ITER=$(( ITER + 1 ))
            if [ "$ITER" == "$MAXTRIES" ]; then
                echo "You are dead, rpower $ME boot to play again."
                echo "Possible problems:
1.  $SNAPSHOTSERVER is not exporting $SNAPSHOTROOT ?
2.  Is DNS set up? Maybe that's why I can't mount $SNAPSHOTSERVER."
                /bin/sh
                exit
            fi
            RS=$(( $RANDOM % 20 ))
            echo "Trying again in $RS seconds ..."
            sleep $RS
        done
    
        # create directory which is named after my node name
        mkdir -p $NEWROOT/$RWDIR/persistent/$ME
        ITER=0
        # umount current persistent mount
        while ! umount -l $NEWROOT/$RWDIR/persistent; do
            ITER=$(( ITER + 1 ))
            if [ "$ITER" == "$MAXTRIES" ]; then
                echo "Your are dead, rpower $ME boot to play again."
                echo "Cannot umount $NEWROOT/$RWDIR/persistent."
                /bin/sh
                exit
            fi
            RS=$(( $RANDOM % 20 ))
            echo "Trying again in $RS seconds..."
            sleep $RS
        done

        # mount persistent to server:/rootpath/nodename
        ITER=0
        while ! mount $SNAPSHOTSERVER:/$SNAPSHOTROOT/$ME  $NEWROOT/$RWDIR/persistent -o $MNT_OPTIONS; do
            ITER=$(( ITER + 1 ))
            if [ "$ITER" == "$MAXTRIES" ]; then
                echo "Your are dead, rpower $ME boot to play again."
                echo "Possible problems: cannot mount to $SNAPSHOTSERVER:/$SNAPSHOTROOT/$ME."
                /bin/sh
                exit
            fi
            RS=$(( $RANDOM % 20 ))
            echo "Trying again in $RS seconds..."
            sleep $RS
        done
    fi

    $NEWROOT/etc/init.d/localdisk
    $NEWROOT/etc/init.d/statelite
    fastboot=yes
    export fastboot
    keep_old_ip=yes
    export keep_old_ip

    mount -n --bind /dev $NEWROOT/dev
    mount -n --bind /proc $NEWROOT/proc
    mount -n --bind /sys $NEWROOT/sys

else
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Failed to download image, panic in 5..."
    echo -n Failed to download image, panic in 5...
    for i in 4 3 2 1 0; do
        /bin/sleep 1
        [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "$i..."
        echo -n $i...
    done 
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "You're dead.  rpower nodename reset to play again." 
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "* Did you packimage with -m cpio, -m squashfs, or -m nfs?"
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "* If using -m squashfs did you include aufs.ko with geninitrd? e.g.:  -n tg3,squashfs,aufs,loop"
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "If using -m nfs did you export NFS and sync rootimg?  And did you include the aufs and nfs modules in the proper order: e.g.:  -n tg3,aufs,loop,sunrpc,lockd,nfs_acl,nfs"
 
    echo
    echo "You're dead.  rpower nodename reset to play again.

* Did you packimage with -m cpio, -m squashfs, or -m nfs?
* If using -m squashfs did you include aufs.ko with geninitrd?
  e.g.:  -n tg3,squashfs,aufs,loop
* If using -m nfs did you export NFS and sync rootimg?  And
  did you include the aufs and nfs modules in the proper order:
  e.g.:  -n tg3,aufs,loop,sunrpc,lockd,nfs_acl,nfs

"
    /bin/sh
    exit
fi
cd /

function getdevfrommac() {
    boothwaddr=$1
    ip link show | while read line
    do
        dev=`echo $line | egrep "^[0-9]+: [0-9A-Za-z]+" | cut -d ' ' -f 2 | cut -d ':' -f 1`
        if [ "X$dev" != "X" ]; then
            devname=$dev
        fi

        if [ "X$devname" != "X" ]; then
            hwaddr=`echo $line | egrep "^[ ]*link" | awk '{print $2}'`
            if [ "X$hwaddr" = "X$boothwaddr" ]; then
                echo $devname
            fi
        fi
    done
}


if [ -z $STATEMNT ]; then
    for lf in /tmp/dhclient.*.lease; do
        netif=${lf#*.}
        netif=${netif%.*}
        cp $lf  "$NEWROOT/var/lib/dhclient/dhclient-$netif.leases"
        [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Saving $NEWROOT/var/lib/dhclient/dhclient-$netif.leases"
    done

    ifname="$(getarg ifname=)"
    netdev="$(getarg netdev=)"
    BOOTIF="$(getarg BOOTIF=)"
    if [ ! -z "$ifname" ]; then
        MACX=${ifname#*:}
        ETHX=${ifname%:$MACX*}
    elif [ ! -z "$netdev" ]; then
        ETHX=$netdev
        MACX=`ip link show $netdev | grep ether | awk '{print $2}'`
    elif [ ! -z "$BOOTIF" ]; then
        MACX=$BOOTIF
        MACX=${MACX#01-}
        MACX=${MACX//-/:}
        ETHX=$(getdevfrommac $MACX)
    fi


    if [ ! -z "$MACX" ] && [ ! -z "$ETHX" ]; then
        if [ ! -e $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX ]; then
            [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Creating $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX"
            touch $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX
        fi
        [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Writing $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX: DEVICE=$ETHX;BOOTPROTO=dhcp;HWADDR=$MACX;ONBOOT=yes"
        echo "DEVICE=$ETHX" > $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX
        echo "BOOTPROTO=dhcp" >> $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX
        echo "HWADDR=$MACX" >> $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX
        echo "ONBOOT=yes" >> $NEWROOT/etc/sysconfig/network-scripts/ifcfg-$ETHX
    fi
fi

[ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "Saving $NEWROOT/etc/resolv.conf"
cp /etc/resolv.conf "$NEWROOT/etc/"

if [ -d "$NEWROOT/etc/sysconfig" -a ! -e "$NEWROOT/etc/sysconfig/selinux" ]; then
    [ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "disable selinux ..."
    echo "SELINUX=disabled" >> "$NEWROOT/etc/sysconfig/selinux"
fi

[ "$xcatdebugmode" > "0" ] && logger -t $log_label -p local4.debug "exiting xcatroot..."
# inject new exit_if_exists
echo 'settle_exit_if_exists="--exit-if-exists=/dev/root"; rm "$job"' > $hookdir/initqueue/xcat.sh
# force udevsettle to break
> $hookdir/initqueue/work
