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#!/bin/bash
#
# 4 loopback devices using the md faulty level for easy
# fault injection on top of which is layered raidz.
#
# zpool-vdev0 zpool-vdev1 zpool-vdev2 zpool-vdev3
# loop0 loop1 loop2 loop3
# md0 (faulty) md1 (faulty) md2 (faulty) md3 (faulty)
# <--------------------- raidz zpool --------------------->
#
FILES="/tmp/zpool-vdev0 \
/tmp/zpool-vdev1 \
/tmp/zpool-vdev2 \
/tmp/zpool-vdev3"
LODEVICES=""
MDDEVICES=""
zpool_create() {
check_loop_utils
check_md_utils
check_md_partitionable || die "Error non-partitionable md devices"
for FILE in ${FILES}; do
LODEVICE=`unused_loop_device`
MDDEVICE=`unused_md_device`
rm -f ${FILE} || exit 1
dd if=/dev/zero of=${FILE} bs=1M count=0 seek=256 \
&>/dev/null || die "Error $? creating ${FILE}"
# Setup the loopback device on the file.
msg "Creating ${LODEVICE} using ${FILE}"
${LOSETUP} ${LODEVICE} ${FILE} || \
die "Error $? creating ${LODEVICE} using ${FILE}"
LODEVICES="${LODEVICES} ${LODEVICE}"
# Setup the md device on the loopback device.
msg "Creating ${MDDEVICE} using ${LODEVICE}"
${MDADM} --build ${MDDEVICE} --level=faulty \
--raid-devices=1 ${LODEVICE} &>/dev/null || \
(destroy_md_devices "${MDDEVICES}" && \
destroy_loop_devices "${LODEVICES}" && \
die "Error $? creating ${MDDEVICE} using ${LODEVICE}")
wait_udev ${MDDEVICE} 30 || \
(destroy_md_devices "${MDDEVICES}" && \
destroy_loop_devices "${LODEVICES}" && \
die "Error udev never created ${MDDEVICE}")
# Create empty GPT/EFI partition table.
${PARTED} --script ${MDDEVICE} mklabel gpt
MDDEVICES="${MDDEVICES} ${MDDEVICE}"
done
msg ${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} raidz ${MDDEVICES}
${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} raidz ${MDDEVICES} || \
(destroy_md_devices "${MDDEVICES}" && \
destroy_loop_devices "${LODEVICES}" && exit 1)
echo "$LODEVICES" >/tmp/zpool-lo.txt
echo "$MDDEVICES" >/tmp/zpool-md.txt
}
zpool_destroy() {
msg ${ZPOOL} destroy ${ZPOOL_NAME}
${ZPOOL} destroy ${ZPOOL_NAME}
destroy_md_devices "`cat /tmp/zpool-md.txt`"
destroy_loop_devices "`cat /tmp/zpool-lo.txt`"
rm -f /tmp/zpool-md.txt /tmp/zpool-lo.txt
}
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