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Diffstat (limited to 'utils/iscsi_discovery.sh')
| -rwxr-xr-x | utils/iscsi_discovery.sh | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/utils/iscsi_discovery.sh b/utils/iscsi_discovery.sh new file mode 100755 index 0000000..be2f390 --- /dev/null +++ b/utils/iscsi_discovery.sh @@ -0,0 +1,195 @@ +#!/bin/bash +# +# Copyright (C) Voltaire Ltd. 2006. ALL RIGHTS RESERVED. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +# Author: Dan Bar Dov <danb@voltaire.com> + +# iscsi_discovery: +# * does a send-targets discovery to the given IP +# * set the transport type to the preferred transport (or tcp is -t flag is not used) +# * tries to login +# * if succeeds, +# o logout, +# o mark record autmatic (unless -m flag is used) +# * else +# o reset transport type to TCP +# o try to login +# o if succeeded +# + logout +# + mark record automatic (unless -m flag is used) +# + +usage() +{ + echo "Usage: $0 <IP> [-p <port>] [-d] [-t <tcp|iser> [-f]] [-m] [-l]" + echo "Options:" + echo "-p set the port number (default is 3260)." + echo "-d print debugging information" + echo "-t set transport (default is tcp)." + echo "-f force specific transport -disable the fallback to tcp (default is fallback enabled)." + echo " force the transport specified by the argument of the -t flag." + echo "-m manual startup - will set manual startup (default is automatic startup)." + echo "-l login to the new discovered nodes (default is false)." +} + +dbg() +{ + $debug && echo $@ +} + +initialize() +{ + trap "exit" 2 + debug=false + force="0" + log_out="1" + startup_manual="0" + #set default transport to tcp + transport=tcp + #set default port to 3260 + port=3260; +} + +parse_cmdline() +{ + if [ $# -lt 1 ]; then + usage + exit 1 + fi + + # check if the IP address is valid + ip=`echo $1 | awk -F'.' '$1 != "" && $1 <=255 && $2 != "" && $2 <= 255 && $3 != "" && $3 <= 255 && $4 != "" && $4 <= 255 {print $0}'` + if [ -z "$ip" ]; then + echo "$1 is not a vaild IP address!" + exit 1 + fi + shift + while getopts "dfmlt:p:" options; do + case $options in + d ) debug=true;; + f ) force="1";; + t ) transport=$OPTARG;; + p ) port=$OPTARG;; + m ) startup_manual="1";; + l ) log_out=0;; + \? ) usage + exit 1;; + * ) usage + exit 1;; + esac + done +} + +discover() +{ + # If open-iscsi is already logged in to the portal, exit + if [ $(iscsiadm -m session | grep -c ${ip}:${port}) -ne 0 ]; then + echo "Please logout from all targets on ${ip}:${port} before trying to run discovery on that portal" + exit 2 + fi + + connected=0 + discovered=0 + + dbg "starting discovery to $ip" + disc="$(iscsiadm -m discovery --type sendtargets --portal ${ip}:${port})" + echo "${disc}" | while read portal target + do + portal=${portal%,*} + select_transport + done + + discovered=$(echo "${disc}" | wc -l) + if [ ${discovered} = 0 ]; then + echo "failed to discover targets at ${ip}" + exit 2 + else + echo "discovered ${discovered} targets at ${ip}" + fi +} + +try_login() +{ + if [ "$startup_manual" != "1" ]; then + iscsiadm -m node --targetname ${target} --portal ${portal} --op update -n node.conn[0].startup -v automatic + fi + iscsiadm -m node --targetname ${target} --portal ${portal} --login >/dev/null 2>&1 + ret=$? + if [ ${ret} = 0 ]; then + echo "Set target ${target} to automatic login over ${transport} to portal ${portal}" + ((connected++)) + if [ "$log_out" = "1" ]; then + iscsiadm -m node --targetname ${target} --portal ${portal} --logout + fi + else + echo "Cannot login over ${transport} to portal ${portal}" + iscsiadm -m node --targetname ${target} --portal ${portal} --op update -n node.conn[0].startup -v manual + fi + return ${ret} +} + +set_transport() +{ + transport=$1 + case "$transport" in + iser) + # iSER does not use digest + iscsiadm -m node --targetname ${target} --portal ${portal} \ + --op update -n node.conn[0].iscsi.HeaderDigest -v None + iscsiadm -m node --targetname ${target} --portal ${portal} \ + --op update -n node.conn[0].iscsi.DataDigest -v None + ;; + cxgb3i) + # cxgb3i supports <= 16K packet (BHS + AHS + pdu payload + digests) + iscsiadm -m node --targetname ${target} --portal ${portal} \ + --op update -n node.conn[0].iscsi.MaxRecvDataSegmentLength \ + -v 8192 + ;; + esac + transport_name=`iscsiadm -m node -p ${portal} -T ${target} |awk '/transport_name/ {print $1}'` + iscsiadm -m node --targetname ${target} --portal ${portal} \ + --op update -n ${transport_name} -v ${transport} +} + +select_transport() +{ + set_transport $transport + dbg "Testing $transport-login to target ${target} portal ${portal}" + try_login; + if [ $? != 0 -a "$force" = "0" ]; then + set_transport tcp + dbg "starting to test tcp-login to target ${target} portal ${portal}" + try_login; + fi +} + +check_iscsid() +{ + #check if iscsid is running + pidof iscsid &>/dev/null + ret=$? + if [ $ret -ne 0 ]; then + echo "iscsid is not running" + echo "Exiting..." + exit 1 + fi +} + +check_iscsid +initialize +parse_cmdline "$@" +discover |