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#!/bin/bash
# Usage: block-iscsi [add tgtname | remove dev]
#
# This assumes you're running a correctly configured
# iscsi target (server) at the other end!
# Note that we assume that the passwords for discovery (if needed)
# are in /etc/iscsid.conf
# and the node session passwords (if required) in the
# open-iscsi database below /var/lib/open-iscsi/node.db
#
# (c) Kurt Garloff <kurt@garloff.de>, 2006-09-04, GNU GPL
# Contributors: Jim Fehlig <jfehlig@novell.com>
# Stefan de Konink <skinkie@xs4all.nl>
dir=$(dirname "$0")
. "$dir/block-common.sh"
# echo "DBG:xen/scripts/block-iscsi $1 $2 XENBUS_PATH=$XENBUS_PATH $par $node"
find_sdev()
{
unset dev
for session in /sys/class/iscsi_session/session*; do
if [ "$1" = "`cat $session/targetname`" ]; then
dev=`basename $session/device/target*/*:0:*/block*/*`
return
fi
done
}
find_sdev_rev()
{
unset tgt
for session in /sys/class/iscsi_session/session*; do
dev=`basename $session/device/target*/*:0:*/block*/*`
if [ "$dev" = "$1" ]; then
tgt=`cat $session/targetname`
return
fi
done
}
case "$command" in
add)
# load modules and start iscsid
/etc/init.d/open-iscsi status >/dev/null 2>&1 ||
{ /etc/init.d/open-iscsi start >/dev/null 2>&1; sleep 1; }
# list of targets on node
/sbin/iscsiadm -m discovery | sed "s/ .*//g" | while read line; do /sbin/iscsiadm -m discovery -t sendtargets -p $line; done >/dev/null
par=`xenstore-read $XENBUS_PATH/params` || true
TGTID=`echo $par | sed "s/\/\///g"`
while read rec uuid; do
if [ "$uuid" = "$TGTID" ]; then
find_sdev $TGTID
if [ -z "$dev" ]; then
/sbin/iscsiadm -m node -T $uuid -p $rec --login || exit 2
sleep 4
find_sdev $TGTID
fi
xenstore-write $XENBUS_PATH/node /dev/$dev
write_dev /dev/$dev
exit 0
fi
done < <(/sbin/iscsiadm -m node)
exit 1
;;
remove)
node=`xenstore-read $XENBUS_PATH/node` || true
dev=$node; dev=${dev#/dev/}
find_sdev_rev $dev
if [ -x /sbin/blockdev -a -n "$node" ]; then blockdev --flushbufs "$node"; fi
test -z "$tgt" && exit 2
/sbin/iscsiadm -m node -T $tgt --logout
exit 1
;;
esac
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