# Local filesystem mounting			-*- shell-script -*-

local_top()
{
	if [ "${local_top_used}" != "yes" ]; then
		[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-top"
		run_scripts /scripts/local-top
		[ "$quiet" != "y" ] && log_end_msg
	fi
	local_top_used=yes
}

local_block()
{
	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-block"
	run_scripts /scripts/local-block "$@"
	[ "$quiet" != "y" ] && log_end_msg
}

local_premount()
{
	if [ "${local_premount_used}" != "yes" ]; then
		[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-premount"
		run_scripts /scripts/local-premount
		[ "$quiet" != "y" ] && log_end_msg
	fi
	local_premount_used=yes
}

local_bottom()
{
	if [ "${local_premount_used}" = "yes" ] || [ "${local_top_used}" = "yes" ]; then
		[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-bottom"
		run_scripts /scripts/local-bottom
		[ "$quiet" != "y" ] && log_end_msg
	fi
	local_premount_used=no
	local_top_used=no
}

# $1=device ID to mount
# $2=optionname (for root and etc)
# Sets $DEV to the resolved device node
local_device_setup()
{
	local dev_id="$1"
	local name="$2"
	local real_dev

	# If wait-for-root understands this prefix, then use it to wait for
	# the device rather than settling the whole of udev.
	case "$dev_id" in
	UUID=*|LABEL=*|/dev/*)
		FSTYPE=$( wait-for-root "$dev_id" 10 )
		;;
	*)
		wait_for_udev 10
		;;
	esac

	# Load ubi with the correct MTD partition and return since fstype
	# doesn't work with a char device like ubi.
	if [ -n "$UBIMTD" ]; then
		modprobe ubi mtd=$UBIMTD
		DEV="${dev_id}"
		return
	fi

	# Don't wait for a device that doesn't have a corresponding
	# device in /dev and isn't resolvable by blkid (e.g. mtd0)
	if [ "${dev_id#/dev}" = "${dev_id}" ] &&
	   [ "${dev_id#*=}" = "${dev_id}" ]; then
		DEV="${dev_id}"
		return
	fi

	# If the root device hasn't shown up yet, give it a little while
	# to allow for asynchronous device discovery (e.g. USB).  We
	# also need to keep invoking the local-block scripts in case
	# there are devices stacked on top of those.
	if ! real_dev=$(resolve_device "${dev_id}") ||
	   ! get_fstype "${real_dev}" >/dev/null; then
		log_begin_msg "Waiting for ${name} file system"

		# Timeout is max(30, rootdelay) seconds (approximately)
		case $DPKG_ARCH in
			powerpc|ppc64|ppc64el)
				slumber=180
				;;
			*)
				slumber=30
				;;
		esac
		if [ ${ROOTDELAY:-0} -gt $slumber ]; then
			slumber=$ROOTDELAY
		fi

		while true; do
			sleep 1
			local_block "${dev_id}"
			if real_dev=$(resolve_device "${dev_id}") &&
			   get_fstype "${real_dev}" >/dev/null; then
				wait_for_udev 10
				log_end_msg 0
				break
			fi
			slumber=$(( ${slumber} - 1 ))
			if [ ${slumber} -eq 0 ]; then
				log_end_msg 1 || true
				break
			fi
		done
	fi

	# We've given up, but we'll let the user fix matters if they can
	while ! real_dev=$(resolve_device "${dev_id}") ||
	      ! get_fstype "${real_dev}" >/dev/null; do
		echo "Gave up waiting for ${name} device.  Common problems:"
		echo " - Boot args (cat /proc/cmdline)"
		echo "   - Check rootdelay= (did the system wait long enough?)"
		if [ "${name}" = root ]; then
			echo "   - Check root= (did the system wait for the right device?)"
		fi
		echo " - Missing modules (cat /proc/modules; ls /dev)"
		panic "ALERT!  ${dev_id} does not exist.  Dropping to a shell!"
	done

	DEV="${real_dev}"
}

local_mount_root()
{
	local_top
	local_device_setup "${ROOT}" root
	ROOT="${DEV}"

	# Get the root filesystem type if not set
	if [ -z "${ROOTFSTYPE}" ]; then
		FSTYPE=$(get_fstype "${ROOT}")
	else
		FSTYPE=${ROOTFSTYPE}
	fi

	local_premount

	if [ "${readonly}" = "y" ] && \
	   [ -z "$LOOP" ]; then
		roflag=-r
	else
		roflag=-w
	fi

	# FIXME This has no error checking
	[ -n "${FSTYPE}" ] && modprobe ${FSTYPE}

	checkfs ${ROOT} root

	# FIXME This has no error checking
	# Mount root
	mount ${roflag} ${FSTYPE:+-t ${FSTYPE} }${ROOTFLAGS} ${ROOT} ${rootmnt}
	mountroot_status="$?"
	if [ "$LOOP" ]; then
		if [ "$mountroot_status" != 0 ]; then
			if [ ${FSTYPE} = ntfs ] || [ ${FSTYPE} = vfat ]; then
				panic "
Could not mount the partition ${ROOT}.
This could also happen if the file system is not clean because of an operating
system crash, an interrupted boot process, an improper shutdown, or unplugging
of a removable device without first unmounting or ejecting it.  To fix this,
simply reboot into Windows, let it fully start, log in, run 'chkdsk /r', then
gracefully shut down and reboot back into Windows. After this you should be
able to reboot again and resume the installation.
(filesystem = ${FSTYPE}, error code = $mountroot_status)
"
			fi
		fi
	
		mkdir -p /host
		mount -o move ${rootmnt} /host

		while [ ! -e "/host/${LOOP#/}" ]; do
			panic "ALERT!  /host/${LOOP#/} does not exist.  Dropping to a shell!"
		done

		# Get the loop filesystem type if not set
		if [ -z "${LOOPFSTYPE}" ]; then
			eval $(fstype < "/host/${LOOP#/}")
		else
			FSTYPE="${LOOPFSTYPE}"
		fi
		if [ "$FSTYPE" = "unknown" ] && [ -x /sbin/blkid ]; then
			FSTYPE=$(/sbin/blkid -s TYPE -o value "/host/${LOOP#/}")
			[ -z "$FSTYPE" ] && FSTYPE="unknown"
		fi

		if [ ${readonly} = y ]; then
			roflag=-r
		else
			roflag=-w
		fi

		# FIXME This has no error checking
		modprobe loop
		modprobe ${FSTYPE}

		# FIXME This has no error checking
		mount ${roflag} -o loop -t ${FSTYPE} ${LOOPFLAGS} "/host/${LOOP#/}" ${rootmnt}

		if [ -d ${rootmnt}/host ]; then
			mount -o move /host ${rootmnt}/host
		fi
	fi
}

local_mount_fs()
{
	read_fstab_entry "$1"

	local_device_setup "$MNT_FSNAME" "$1"
	MNT_FSNAME="${DEV}"

	local_premount

	if [ "${readonly}" = "y" ]; then
		roflag=-r
	else
		roflag=-w
	fi

	# FIXME This has no error checking
	modprobe "${MNT_TYPE}"

	if [ "$MNT_PASS" != 0 ]; then
		checkfs "$MNT_FSNAME" "$MNT_DIR"
	fi

	# FIXME This has no error checking
	# Mount filesystem
	mount ${roflag} -t "${MNT_TYPE}" -o "${MNT_OPTS}" "$MNT_FSNAME" "${rootmnt}${MNT_DIR}"
}

mountroot()
{
	local_mount_root
}

mount_top()
{
	# Note, also called directly in case it's overridden.
	local_top
}

mount_premount()
{
	# Note, also called directly in case it's overridden.
	local_premount
}

mount_bottom()
{
	# Note, also called directly in case it's overridden.
	local_bottom
}