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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/target/target-export-device | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/target/target-export-device')
-rwxr-xr-x | Documentation/target/target-export-device | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/Documentation/target/target-export-device b/Documentation/target/target-export-device new file mode 100755 index 000000000..b803f4f88 --- /dev/null +++ b/Documentation/target/target-export-device @@ -0,0 +1,80 @@ +#!/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" |