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195 lines
5.2 KiB
195 lines
5.2 KiB
#!/bin/sh
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#
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# Copyright (C) Voltaire Ltd. 2006. ALL RIGHTS RESERVED.
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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
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# Author: Dan Bar Dov <danb@voltaire.com>
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# iscsi_discovery:
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# * does a send-targets discovery to the given IP
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# * set the transport type to the preferred transport (or tcp is -t flag is not used)
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# * tries to login
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# * if succeeds,
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# o logout,
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# o mark record autmatic (unless -m flag is used)
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# * else
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# o reset transport type to TCP
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# o try to login
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# o if succeeded
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# + logout
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# + mark record automatic (unless -m flag is used)
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#
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usage()
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{
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echo "Usage: $0 <IP> [-p <port>] [-d] [-t <tcp|iser> [-f]] [-m] [-l]"
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echo "Options:"
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echo "-p set the port number (default is 3260)."
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echo "-d print debugging information"
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echo "-t set transport (default is tcp)."
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echo "-f force specific transport -disable the fallback to tcp (default is fallback enabled)."
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echo " force the transport specified by the argument of the -t flag."
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echo "-m manual startup - will set manual startup (default is automatic startup)."
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echo "-l login to the new discovered nodes (default is false)."
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}
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dbg()
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{
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$debug && echo $@
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}
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initialize()
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{
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trap "exit" 2
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debug=false
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force="0"
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log_out="1"
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startup_manual="0"
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#set default transport to tcp
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transport=tcp
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#set default port to 3260
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port=3260;
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}
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parse_cmdline()
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{
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if [ $# -lt 1 ]; then
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usage
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exit 1
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fi
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# check if the IP address is valid
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ip=`echo $1 | awk -F'.' '$1 != "" && $1 <=255 && $2 != "" && $2 <= 255 && $3 != "" && $3 <= 255 && $4 != "" && $4 <= 255 {print $0}'`
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if [ -z "$ip" ]; then
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echo "$1 is not a vaild IP address!"
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exit 1
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fi
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shift
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while getopts "dfmlt:p:" options; do
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case $options in
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d ) debug=true;;
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f ) force="1";;
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t ) transport=$OPTARG;;
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p ) port=$OPTARG;;
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m ) startup_manual="1";;
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l ) log_out=0;;
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\? ) usage
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exit 1;;
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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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}
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discover()
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{
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# If open-iscsi is already logged in to the portal, exit
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if [ $(iscsiadm -m session | grep -c ${ip}:${port}) -ne 0 ]; then
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echo "Please logout from all targets on ${ip}:${port} before trying to run discovery on that portal"
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exit 2
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fi
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connected=0
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discovered=0
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dbg "starting discovery to $ip"
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disc="$(iscsiadm -m discovery --type sendtargets --portal ${ip}:${port})"
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echo "${disc}" | while read portal target
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do
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portal=${portal%,*}
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select_transport
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done
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discovered=$(echo "${disc}" | wc -l)
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if [ ${discovered} = 0 ]; then
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echo "failed to discover targets at ${ip}"
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exit 2
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else
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echo "discovered ${discovered} targets at ${ip}"
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fi
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}
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try_login()
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{
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if [ "$startup_manual" != "1" ]; then
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iscsiadm -m node --targetname ${target} --portal ${portal} --op update -n node.conn[0].startup -v automatic
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fi
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iscsiadm -m node --targetname ${target} --portal ${portal} --login >/dev/null 2>&1
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ret=$?
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if [ ${ret} = 0 ]; then
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echo "Set target ${target} to automatic login over ${transport} to portal ${portal}"
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((connected++))
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if [ "$log_out" = "1" ]; then
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iscsiadm -m node --targetname ${target} --portal ${portal} --logout
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fi
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else
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echo "Cannot login over ${transport} to portal ${portal}"
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iscsiadm -m node --targetname ${target} --portal ${portal} --op update -n node.conn[0].startup -v manual
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fi
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return ${ret}
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}
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set_transport()
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{
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transport=$1
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case "$transport" in
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iser)
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# iSER does not use digest
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iscsiadm -m node --targetname ${target} --portal ${portal} \
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--op update -n node.conn[0].iscsi.HeaderDigest -v None
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iscsiadm -m node --targetname ${target} --portal ${portal} \
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--op update -n node.conn[0].iscsi.DataDigest -v None
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;;
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cxgb3i)
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# cxgb3i supports <= 16K packet (BHS + AHS + pdu payload + digests)
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iscsiadm -m node --targetname ${target} --portal ${portal} \
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--op update -n node.conn[0].iscsi.MaxRecvDataSegmentLength \
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-v 8192
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;;
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esac
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transport_name=`iscsiadm -m node -p ${portal} -T ${target} |awk '/transport_name/ {print $1}'`
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iscsiadm -m node --targetname ${target} --portal ${portal} \
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--op update -n ${transport_name} -v ${transport}
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}
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select_transport()
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{
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set_transport $transport
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dbg "Testing $transport-login to target ${target} portal ${portal}"
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try_login;
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if [ $? != 0 -a "$force" = "0" ]; then
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set_transport tcp
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dbg "starting to test tcp-login to target ${target} portal ${portal}"
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try_login;
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fi
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}
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check_iscsid()
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{
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#check if iscsid is running
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pidof iscsid &>/dev/null
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ret=$?
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if [ $ret -ne 0 ]; then
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echo "iscsid is not running"
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echo "Exiting..."
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exit 1
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fi
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}
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check_iscsid
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initialize
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parse_cmdline "$@"
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discover
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