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# NFS filesystem mounting			-*- shell-script -*-# NBD root mountingmountroot(){	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-top"	run_scripts /scripts/nfs-top	[ "$quiet" != "y" ] && log_end_msg	# For DHCP	modprobe -q af_packet	case ${IPOPTS} in		none|off)			# Do nothing			;;		""|on|any)			# Bring up device			ipconfig ${DEVICE}			;;		dhcp|bootp|rarp|both)			ipconfig -c ${IPOPTS} -d ${DEVICE}			;;		*)			ipconfig -d $IPOPTS			# grab device entry from ip option			NEW_DEVICE=${IPOPTS#*:*:*:*:*:*}			if [ "${NEW_DEVICE}" != "${IPOPTS}" ]; then				NEW_DEVICE=${NEW_DEVICE%:*}			else				# wrong parse, possibly only a partial string				NEW_DEVICE=			fi			if [ -n "${NEW_DEVICE}" ]; then				DEVICE="${NEW_DEVICE}"			fi			;;	esac	# source relevant ipconfig output	. /tmp/net-${DEVICE}.conf    if [ -n "${nbdroot}" ]; then               NBD_ROOT_SERVER=$( echo "${nbdroot}" | sed 's/:.*//')               NBD_ROOT_PORT=$( echo "${nbdroot}" | sed 's/.*://')       else               NBD_ROOT_SERVER="${ROOTSERVER}"               NBD_ROOT_PORT=${nbdport:-"2000"}       fi       if [ -n "${nbdswap}" ]; then               NBD_SWAP_SERVER=$( echo "${nbdswap}" | sed 's/:.*//')               NBD_SWAP_PORT=$( echo "${nbdswap}" | sed 's/.*://')       else               NBD_SWAP_SERVER="${ROOTSERVER}"               NBD_SWAP_PORT=${nbdswapport:-"9572"}    fi    # try to get swap from the server if we dont have enough ram (less than 48M)    min_ram=49152    real_ram=$(cat /proc/meminfo |grep MemTotal|tr -d " [a-z][A-Z]:")    if [ ${real_ram} -lt ${min_ram} ];then        [ "$quiet" != "y" ] && log_begin_msg "Only found ${real_ram}k main ram, trying network swap."        nbd-client ${NBD_SWAP_SERVER} ${NBD_SWAP_PORT} /dev/nbd1 || true        mkswap /dev/nbd1 || true        swapon /dev/nbd1 || true        [ "$quiet" != "y" ] && log_end_msg    fi    mkdir -p /cow    mkdir -p /rofs    # create tmpfs for writeable files    mount -t tmpfs tmpfs /cow    # mount the readonly root    nbd-client ${NBD_ROOT_SERVER} ${NBD_ROOT_PORT} /dev/nbd0 && mount -o ro -t squashfs /dev/nbd0 /rofs    # merge ro and rw filesystems    mount -t unionfs -o dirs=/cow=rw:/rofs=ro unionfs ${rootmnt}    # make the filesystems accessible    mkdir -p ${rootmnt}/cow    mount -o bind /cow ${rootmnt}/cow    mkdir -p ${rootmnt}/rofs    mount -o move /rofs ${rootmnt}/rofs    # get the lts.conf via tftp    tftpath=$(echo ${filename%/*}|tr -d '"')    (echo "get ${tftpath}/lts.conf"|tftp ${ROOTSERVER} >/dev/null 2>&1)    if [ -s ./lts.conf ];then        cp ./lts.conf ${rootmnt}/etc/    fi	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-bottom"	run_scripts /scripts/nfs-bottom	[ "$quiet" != "y" ] && log_end_msg}