/sbin/iscsi_discovery is in open-iscsi 2.0.874-5ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | #!/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., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 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 (defualt 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 (defualt is false)."
}
dbg()
{
$debug && echo $@
}
initialize()
{
trap "exit" 2
debug=false
force="0"
log_out="1"
startup_manual="0"
#set defualt transport to tcp
transport=tcp
#set defualt 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
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