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#!/bin/bash
#
# 1 scsi_debug device for fault injection and 3 loopback devices
# on top of which is layered raid10 (mirrored).
#
SDSIZE=${SDSIZE:-256}
SDHOSTS=${SDHOSTS:-1}
SDTGTS=${SDTGTS:-1}
SDLUNS=${SDLUNS:-1}
LDMOD=/sbin/modprobe
FILES="/tmp/zpool-vdev0 \
/tmp/zpool-vdev1 \
/tmp/zpool-vdev2"
DEVICES_M1=""
DEVICES_M2=""
zpool_create() {
local COUNT=0
check_loop_utils
check_sd_utils
test `${LSMOD} | grep -c scsi_debug` -gt 0 && \
(echo 0 >/sys/module/scsi_debug/parameters/every_nth && \
${RMMOD} scsi_debug || exit 1)
udev_trigger
msg "${LDMOD} scsi_debug dev_size_mb=${SDSIZE} " \
"add_host=${SDHOSTS} num_tgts=${SDTGTS} " \
"max_luns=${SDLUNS}"
${LDMOD} scsi_debug \
dev_size_mb=${SDSIZE} \
add_host=${SDHOSTS} \
num_tgts=${SDTGTS} \
max_luns=${SDLUNS} || \
die "Error $? creating scsi_debug devices"
udev_trigger
SDDEVICE=`${LSSCSI}|${AWK} '/scsi_debug/ { print $6; exit }'`
msg "${PARTED} -s ${SDDEVICE} mklabel gpt"
${PARTED} -s ${SDDEVICE} mklabel gpt || \
(${RMMOD} scsi_debug && die "Error $? creating gpt label")
for FILE in ${FILES}; do
LODEVICE=`unused_loop_device`
rm -f ${FILE} || exit 1
dd if=/dev/zero of=${FILE} bs=1024k count=0 seek=256 \
&>/dev/null || (${RMMOD} scsi_debug && \
die "Error $? creating ${FILE}")
# Setup the loopback device on the file.
msg "Creating ${LODEVICE} using ${FILE}"
${LOSETUP} ${LODEVICE} ${FILE} || (${RMMOD} scsi_debug \
die "Error $? creating ${LODEVICE} using ${FILE}")
DEVICES="${DEVICES} ${LODEVICE}"
done
DEVICES="${DEVICES} ${SDDEVICE}"
for DEVICE in ${DEVICES}; do
let COUNT=${COUNT}+1
if [ $((COUNT % 2)) -eq 0 ]; then
DEVICES_M2="${DEVICES_M2} ${DEVICE}"
else
DEVICES_M1="${DEVICES_M1} ${DEVICE}"
fi
done
msg "${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} " \
"mirror ${DEVICES_M1} mirror ${DEVICES_M2}"
${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} \
mirror ${DEVICES_M1} mirror ${DEVICES_M2} || \
(${RMMOD} scsi_debug && exit 1)
}
zpool_destroy() {
msg ${ZPOOL} destroy ${ZPOOL_NAME}
${ZPOOL} destroy ${ZPOOL_NAME}
for FILE in ${FILES}; do
LODEVICE=`${LOSETUP} -a | grep ${FILE} | head -n1|cut -f1 -d:`
msg "Removing ${LODEVICE} using ${FILE}"
${LOSETUP} -d ${LODEVICE} ||
die "Error $? destroying ${LODEVICE} using ${FILE}"
rm -f ${FILE} || exit 1
done
msg "${RMMOD} scsi_debug"
${RMMOD} scsi_debug || die "Error $? removing scsi_debug devices"
}
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