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Feature #1592: Upload a patched version of the 'tgt-setup-lun' script provided by SZTAKI LPDS.
This commit is contained in:
Jaime Melis
parent
78e300e5bb
commit
7890918dff
279
share/scripts/tgt/tgt-setup-lun-one
Executable file
279
share/scripts/tgt/tgt-setup-lun-one
Executable file
@ -0,0 +1,279 @@
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#!/bin/bash
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# LUN assignment script
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#
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# Copyright (C) 2007 Erez Zilber <erezz@voltaire.com>
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#
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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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# License.
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#
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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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#
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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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# 02110-1301 USA
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usage()
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{
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name=$(basename $0);
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echo "usage:";
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echo -e "\t$name -n tgt_name -d dev -b bs_name -t transport [initiator_IP1 initiator_IP2 ...]";
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echo "defaults:";
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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 "examples:";
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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$name -n tgt-3 -d ~/disk3.bin -b rdwr 192.168.1.2 192.168.1.3";
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}
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verify_params()
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{
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if ! [ "$dev" -o "$bs_type" == "null" ]; then
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echo "Error: a device is mandatory";
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exit 1;
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else
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return;
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fi
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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: $dev is not a device";
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exit 1;
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fi
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if ! [ "$tgt_name" ]; then
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echo "Error: target name is mandatory";
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exit 1;
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fi
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if ! [ "$lld_name" ]; then
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echo "Error: lld name empty";
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exit 1;
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fi
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}
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find_vacant_tgt_id()
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{
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tmp_file=`mktemp`
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tgtadm --lld $lld_name --op show --mode target | strings > $tmp_file
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id_list=$(cat $tmp_file | grep Target | cut -d" " -f2 | sed s/://)
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next_vacant_id=1
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for id in $id_list; do
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if (($id > $next_vacant_id)); then
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break;
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else
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next_vacant_id=$((next_vacant_id+1))
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fi
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done
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rm -f $tmp_file
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echo $next_vacant_id
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}
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find_vacant_lun()
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{
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tid=$1
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tgt_found=0
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next_vacant_lun=0
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tmp_file=`mktemp`
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tgtadm --lld $lld_name --op show --mode target | strings | tgt-admin -s | grep 'LUN\|Target' > $tmp_file
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retcode=$?
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while read line; do
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# Check if we finished going over this target
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if ((tgt_found == 1 && $(echo $line | grep -c "^Target") == 1)); then
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break
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fi
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# Check if we found the requested target
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if (($(echo $line | grep -c "Target $tid:") == 1)); then
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tgt_found=1
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continue
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fi
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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 > $next_vacant_lun)); then
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break
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else
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next_vacant_lun=$((next_vacant_lun+1))
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fi
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fi
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done < $tmp_file
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rm -f $tmp_file
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if ((tgt_found == 0)); then
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echo "Error: could not find a LUN for target $tid, guessing 1 as next vacant LUN"
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return 1
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fi
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if ((next_vacant_lun == 0)); then
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echo "Error: could not find a LUN for target $tid, guessing 1 as next vacant LUN"
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return 1
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fi
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return $next_vacant_lun
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}
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err_exit()
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{
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if ((new_tgt == 0)); then
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exit 1
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fi
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echo "Deleting new target, tid=$tid"
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tgtadm --lld $lld_name --op delete --mode target --tid $tid
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res=$?
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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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fi
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exit 1
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}
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check_if_tgt_exists()
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{
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tgt_list=$(tgtadm --lld $lld_name --op show --mode target | strings | 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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return 1
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fi
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done
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return 0
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}
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if [ $# -eq 0 ]; then
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usage
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exit 1
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fi
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lld_name="iscsi"
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while getopts "d:n:b:t:h:" opt
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do
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case ${opt} in
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d)
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dev=$OPTARG;;
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n)
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tgt_name=$OPTARG;;
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b)
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bs_type=$OPTARG;;
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t)
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lld_name=$OPTARG;;
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h*)
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usage
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exit 1
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esac
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done
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shift $(($OPTIND - 1))
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initiators=$*
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verify_params
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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 "Exiting..."
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exit 1
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fi
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echo "Using transport: $lld_name"
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if ! [[ $tgt_name =~ ^iqn ]]; then
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tgt_name="iqn.2001-04.com.$(hostname -s)-$tgt_name"
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fi
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# Make sure that a target with the same name doesn't exist
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check_if_tgt_exists
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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 [ $add_lun != "yes" ]; then
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exit 1
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fi
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tid=$(tgtadm --lld $lld_name --op show --mode target | strings | grep $tgt_name | cut -d" " -f2)
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tid=${tid%:}
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new_tgt=0
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else
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i=0
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while [ true ]
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do
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let i=i+1
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tid=`find_vacant_tgt_id`
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#tid=$?
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# Create the new target
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echo -n "Creating new target (name=$tgt_name, tid=$tid)..."
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tgtoutput=`tgtadm --lld $lld_name --op new --mode target --tid $tid -T $tgt_name 2>&1`
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res=$?
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if [ "$tgtoutput" == "tgtadm: this target already exists" ]; then
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echo "Target already exists (this should not happen)... Attempt $i"
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elif [ $res -eq 0 ]; then # output is not about duplication and return value is zero, this is the normal condition
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break
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fi
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if [ $i -eq 100 ]; then
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echo "Too many attempts, giving up"
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break
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fi
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done
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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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exit 1
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fi
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new_tgt=1
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fi
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echo "OK"
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find_vacant_lun $tid
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lun=$?
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echo "LUN ok, $lun"
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# Add a logical unit to the target
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echo "Adding a logical unit ($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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bs_opt="-E $bs_type"
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fi
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tgtadm --lld $lld_name --op new --mode logicalunit --tid $tid --lun $lun -b $dev $bs_opt
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res=$?
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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=$tid"
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err_exit
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fi
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# Define which initiators can use this target
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if test "$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 $initiator
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res=$?
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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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fi
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done
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else
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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 $tid -I ALL
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res=$?
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if [ $res -ne 0 ]; then
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echo "Error: failed to set access for all initiators"
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err_exit
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fi
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fi
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@ -44,7 +44,7 @@ SYNC=sync
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TAR=tar
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TGTADM=tgtadm
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TGTADMIN=tgt-admin
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TGTSETUPLUN=tgt-setup-lun
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TGTSETUPLUN=tgt-setup-lun-one
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VMKFSTOOLS=vmkfstools
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WGET=wget
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