# NFS filesystem mounting			-*- shell-script -*-

# FIXME This needs error checking

retry_nr=0

# parse nfs bootargs + launch ipconfig and nfsmount
do_nfsmount()
{
	# support ip options see linux sources Documentation/nfsroot.txt
	case ${IPOPTS} in
		none|off)
			# Do nothing
			;;
		""|on|any)
			# Bring up device
			ipconfig ${DEVICE}
			;;
		dhcp|bootb|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

	# get nfs root from dhcp
	if [ "x${NFSROOT}" = "xauto" ]; then
		NFSROOT=${ROOTSERVER}:${ROOTPATH}
	# nfsroot=[<server-ip>:]<root-dir>[,<nfs-options>]
	elif [ -n "${NFSROOT}" ]; then
		# nfs options are an optional arg
		if [ "${NFSROOT#*,}" != "${NFSROOT}" ]; then
			NFSOPTS="-o ${NFSROOT#*,}"
		fi
		NFSROOT=${NFSROOT%%,*}
		if [ "${NFSROOT#*:}" = "$NFSROOT" ]; then
			NFSROOT=${ROOTSERVER}:${NFSROOT}
		fi
	fi

	if [ -z "${NFSOPTS}" ]; then
		NFSOPTS="-o retrans=10"
	fi

	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-premount"
	run_scripts /scripts/nfs-premount
	[ "$quiet" != "y" ] && log_end_msg

	if [ ${readonly} = y ]; then
		roflag="-o ro"
	else
		roflag="-o rw"
	fi

	nfsmount -o nolock ${roflag} ${NFSOPTS} ${NFSROOT} ${rootmnt}
}

# NFS root mounting
mountroot()
{
	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-top"
	run_scripts /scripts/nfs-top
	[ "$quiet" != "y" ] && log_end_msg

	modprobe -q nfs
	# For DHCP
	modprobe -q af_packet

	# Default delay is around 180s
	# FIXME: add usplash info
	if [ -z "${ROOTDELAY}" ]; then
		delay=180
	else
		delay=${ROOTDELAY}
	fi

	# loop until nfsmount succeds
	while [ ${delay} -gt 0 ] && [ ! -e ${rootmnt}${init} ]; do
		[ ${retry_nr} -gt 0 ] && \
		[ "$quiet" != "y" ] && log_begin_msg "Retrying nfs mount"
		do_nfsmount
		# FIXME: ipconfig loops every min at least - better param??
		delay=$(( ${delay} - 1 ))
		[ ${retry_nr} -gt 0 ] && [ "$quiet" != "y" ] && log_end_msg
		[ ! -e ${rootmnt}/sbin/init ] && /bin/sleep 0.1
		retry_nr=$(( ${retry_nr} + 1 ))
	done

	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/nfs-bottom"
	run_scripts /scripts/nfs-bottom
	[ "$quiet" != "y" ] && log_end_msg
}