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