81 lines
2.2 KiB
Plaintext
81 lines
2.2 KiB
Plaintext
|
#!/bin/sh
|
||
|
|
#
|
||
|
|
# This script illustrates the sequence of operations in configfs to
|
||
|
|
# create a very simple LIO iSCSI target with a file or block device
|
||
|
|
# backstore.
|
||
|
|
#
|
||
|
|
# (C) Copyright 2014 Christophe Vu-Brugier <cvubrugier@fastmail.fm>
|
||
|
|
#
|
||
|
|
|
||
|
|
print_usage() {
|
||
|
|
cat <<EOF
|
||
|
|
Usage: $(basename $0) [-p PORTAL] DEVICE|FILE
|
||
|
|
Export a block device or a file as an iSCSI target with a single LUN
|
||
|
|
EOF
|
||
|
|
}
|
||
|
|
|
||
|
|
die() {
|
||
|
|
echo $1
|
||
|
|
exit 1
|
||
|
|
}
|
||
|
|
|
||
|
|
while getopts "hp:" arg; do
|
||
|
|
case $arg in
|
||
|
|
h) print_usage; exit 0;;
|
||
|
|
p) PORTAL=${OPTARG};;
|
||
|
|
esac
|
||
|
|
done
|
||
|
|
shift $(($OPTIND - 1))
|
||
|
|
|
||
|
|
DEVICE=$1
|
||
|
|
[ -n "$DEVICE" ] || die "Missing device or file argument"
|
||
|
|
[ -b $DEVICE -o -f $DEVICE ] || die "Invalid device or file: ${DEVICE}"
|
||
|
|
IQN="iqn.2003-01.org.linux-iscsi.$(hostname):$(basename $DEVICE)"
|
||
|
|
[ -n "$PORTAL" ] || PORTAL="0.0.0.0:3260"
|
||
|
|
|
||
|
|
CONFIGFS=/sys/kernel/config
|
||
|
|
CORE_DIR=$CONFIGFS/target/core
|
||
|
|
ISCSI_DIR=$CONFIGFS/target/iscsi
|
||
|
|
|
||
|
|
# Load the target modules and mount the config file system
|
||
|
|
lsmod | grep -q configfs || modprobe configfs
|
||
|
|
lsmod | grep -q target_core_mod || modprobe target_core_mod
|
||
|
|
mount | grep -q ^configfs || mount -t configfs none $CONFIGFS
|
||
|
|
mkdir -p $ISCSI_DIR
|
||
|
|
|
||
|
|
# Create a backstore
|
||
|
|
if [ -b $DEVICE ]; then
|
||
|
|
BACKSTORE_DIR=$CORE_DIR/iblock_0/data
|
||
|
|
mkdir -p $BACKSTORE_DIR
|
||
|
|
echo "udev_path=${DEVICE}" > $BACKSTORE_DIR/control
|
||
|
|
else
|
||
|
|
BACKSTORE_DIR=$CORE_DIR/fileio_0/data
|
||
|
|
mkdir -p $BACKSTORE_DIR
|
||
|
|
DEVICE_SIZE=$(du -b $DEVICE | cut -f1)
|
||
|
|
echo "fd_dev_name=${DEVICE}" > $BACKSTORE_DIR/control
|
||
|
|
echo "fd_dev_size=${DEVICE_SIZE}" > $BACKSTORE_DIR/control
|
||
|
|
echo 1 > $BACKSTORE_DIR/attrib/emulate_write_cache
|
||
|
|
fi
|
||
|
|
echo 1 > $BACKSTORE_DIR/enable
|
||
|
|
|
||
|
|
# Create an iSCSI target and a target portal group (TPG)
|
||
|
|
mkdir $ISCSI_DIR/$IQN
|
||
|
|
mkdir $ISCSI_DIR/$IQN/tpgt_1/
|
||
|
|
|
||
|
|
# Create a LUN
|
||
|
|
mkdir $ISCSI_DIR/$IQN/tpgt_1/lun/lun_0
|
||
|
|
ln -s $BACKSTORE_DIR $ISCSI_DIR/$IQN/tpgt_1/lun/lun_0/data
|
||
|
|
echo 1 > $ISCSI_DIR/$IQN/tpgt_1/enable
|
||
|
|
|
||
|
|
# Create a network portal
|
||
|
|
mkdir $ISCSI_DIR/$IQN/tpgt_1/np/$PORTAL
|
||
|
|
|
||
|
|
# Disable authentication
|
||
|
|
echo 0 > $ISCSI_DIR/$IQN/tpgt_1/attrib/authentication
|
||
|
|
echo 1 > $ISCSI_DIR/$IQN/tpgt_1/attrib/generate_node_acls
|
||
|
|
|
||
|
|
# Allow write access for non authenticated initiators
|
||
|
|
echo 0 > $ISCSI_DIR/$IQN/tpgt_1/attrib/demo_mode_write_protect
|
||
|
|
|
||
|
|
echo "Target ${IQN}, portal ${PORTAL} has been created"
|