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# LUN assignment script
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# Copyright (C) 2007 Erez Zilber <erezz@voltaire.com>
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation, version 2 of the
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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echo -e "\t$name -n tgt_name -d dev -b bs_name -t transport [initiator_IP1 initiator_IP2 ...]";
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echo -e "\tbacking store: rdwr";
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echo -e "\ttransport: iscsi";
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echo -e "\tinitiator: ALL";
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echo -e "\t$name -n tgt-1 -d /dev/sdb1 192.168.1.2";
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echo -e "\t$name -n tgt-2 -d /tmp/null -b null -t iser";
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echo -e "\t$name -n tgt-3 -d ~/disk3.bin -b rdwr 192.168.1.2 192.168.1.3";
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if ! [ "$dev" -o "$bs_type" == "null" ]; then
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echo "Error: a device is mandatory";
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# Make sure that the device exists
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if ! [ -b $dev -o -f $dev -o -c $dev ]; then
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echo "Error: $dev is not a device";
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if ! [ "$tgt_name" ]; then
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echo "Error: target name is mandatory";
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if ! [ "$lld_name" ]; then
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echo "Error: lld name empty";
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id_list=$(tgtadm --lld $lld_name --op show --mode target | grep Target | cut -d" " -f2 | sed s/://)
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for id in $id_list; do
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if (($id > $next_vacant_id)); then
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next_vacant_id=$((next_vacant_id+1))
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return $next_vacant_id
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tmp_file=/tmp/target_list.txt
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tgtadm --lld $lld_name --op show --mode target > $tmp_file
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# Check if we finished going over this target
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if ((tgt_found == 1 && $(echo $line | grep -c "^Target") == 1)); then
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# Check if we found the requested target
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if (($(echo $line | grep -c "Target $tid:") == 1)); then
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if ((tgt_found == 1 && $(echo $line | grep -c "LUN:") == 1)); then
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curr_lun=$(echo $line | cut -d" " -f2)
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if (($curr_lun > $next_vacant_lun)); then
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next_vacant_lun=$((next_vacant_lun+1))
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if ((tgt_found == 0)); then
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echo "Error: could not find a LUN for target $tid"
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return $next_vacant_lun
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echo "Deleting new target, tid=$tid"
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tgtadm --lld $lld_name --op delete --mode target --tid $tid
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if [ $res -ne 0 ]; then
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echo "Error: failed to delete target, tid=$tid"
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check_if_tgt_exists()
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tgt_list=$(tgtadm --lld $lld_name --op show --mode target | grep Target | cut -d" " -f3)
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for curr_tgt in $tgt_list; do
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if [ $tgt_name = $curr_tgt ]; then
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if [ $# -eq 0 ]; then
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while getopts "d:n:b:t:h:" opt
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shift $(($OPTIND - 1))
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# Check if tgtd is running (we should have 2 daemons)
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tgtd_count=`pidof tgtd | wc -w`
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if [ $tgtd_count -lt 1 ]; then
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echo "tgtd is not running"
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echo "Using transport: $lld_name"
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tgt_name="iqn.2001-04.com.$(hostname -s)-$tgt_name"
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# Make sure that a target with the same name doesn't exist
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if [ $? -eq 1 ]; then
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echo "Error: target named $tgt_name already exists"
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read -p "Add a new lun to the existing target? (yes/NO): " add_lun
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if [ $add_lun != "yes" ]; then
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tid=$(tgtadm --lld $lld_name --op show --mode target | grep $tgt_name | cut -d" " -f2)
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# Create the new target
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echo "Creating new target (name=$tgt_name, tid=$tid)"
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tgtadm --lld $lld_name --op new --mode target --tid $tid -T $tgt_name
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if [ $res -ne 0 ]; then
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echo "Error: failed to create target (name=$tgt_name, tid=$tid)"
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# Add a logical unit to the target
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echo "Adding a logical unit ($dev) to target, tid=$tid"
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if [ $bs_type ]; then
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echo "Setting backing store type: $bs_type"
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tgtadm --lld $lld_name --op new --mode logicalunit --tid $tid --lun $lun -b $dev $bs_opt
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if [ $res -ne 0 ]; then
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echo "Error: failed to add a logical unit ($dev) to target, tid=$tid"
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# Define which initiators can use this target
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if test "$initiators" ; then
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# Allow access only for specific initiators
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echo "Accepting connections only from $initiators"
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for initiator in $initiators; do
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tgtadm --lld $lld_name --op bind --mode target --tid $tid -I $initiator
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if [ $res -ne 0 ]; then
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echo "Error: could not assign initiator $initiator to the target"
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# Allow access for everyone
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echo "Accepting connections from all initiators"
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tgtadm --lld $lld_name --op bind --mode target --tid $tid -I ALL
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if [ $res -ne 0 ]; then
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echo "Error: failed to set access for all initiators"
added
removed
.pc/make-tgt-setup-lun-executable/scripts/tgt-setup-lun
