mirror_zfs/scripts/zpool-config/lo-raid10.sh

#!/bin/bash
#
# 4 Device Loopback Raid-0 Configuration
#

FILEDIR=${FILEDIR:-/var/tmp}
FILES_M1=${FILES_M1:-"$FILEDIR/file-vdev0 $FILEDIR/file-vdev1"}
FILES_M2=${FILES_M2:-"$FILEDIR/file-vdev2 $FILEDIR/file-vdev3"}
FILES="${FILES_M1} ${FILES_M2}"
DEVICES_M1=""
DEVICES_M2=""

zpool_create() {
	check_loop_utils

	for FILE in ${FILES_M1}; do
		DEVICE=`unused_loop_device`
		msg "Creating ${FILE} using loopback device ${DEVICE}"
		rm -f ${FILE} || exit 1
		dd if=/dev/zero of=${FILE} bs=1024k count=0 seek=256 \
			&>/dev/null || die "Error $? creating ${FILE}"
		${LOSETUP} ${DEVICE} ${FILE} ||
			die "Error $? creating ${FILE} -> ${DEVICE} loopback"
		DEVICES_M1="${DEVICES_M1} ${DEVICE}"
	done

	for FILE in ${FILES_M2}; do
		DEVICE=`unused_loop_device`
		msg "Creating ${FILE} using loopback device ${DEVICE}"
		rm -f ${FILE} || exit 1
		dd if=/dev/zero of=${FILE} bs=1024k count=0 seek=256 \
			&>/dev/null || die "Error $? creating ${FILE}"
		${LOSETUP} ${DEVICE} ${FILE} ||
			die "Error $? creating ${FILE} -> ${DEVICE} loopback"
		DEVICES_M2="${DEVICES_M2} ${DEVICE}"
	done

	msg ${ZPOOL} create ${ZPOOL_FLAGS} ${ZPOOL_NAME} \
		mirror ${DEVICES_M1} mirror ${DEVICES_M2}
	${ZPOOL} create ${ZPOOL_FLAGS} ${ZPOOL_NAME} \
		mirror ${DEVICES_M1} mirror ${DEVICES_M2}
}

zpool_destroy() {
	msg ${ZPOOL} destroy ${ZPOOL_NAME}
	${ZPOOL} destroy ${ZPOOL_NAME}

	# Delay to ensure device is closed before removing loop device
	sleep 1

	for FILE in ${FILES}; do
		DEVICE=`${LOSETUP} -a | grep ${FILE} | head -n1|cut -f1 -d:`
		msg "Removing ${FILE} using loopback device ${DEVICE}"
		${LOSETUP} -d ${DEVICE} ||
			die "Error $? destroying ${FILE} -> ${DEVICE} loopback"
		rm -f ${FILE} || exit 1
	done
}