2007-02-11 11:48:10 +01:00
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#!/bin/bash
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# Usage: block-iscsi [add tgtname | remove dev]
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#
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# This assumes you're running a correctly configured
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# iscsi target (server) at the other end!
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# Note that we assume that the passwords for discovery (if needed)
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# are in /etc/iscsid.conf
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# and the node session passwords (if required) in the
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# open-iscsi database below /var/lib/open-iscsi/node.db
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#
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# (c) Kurt Garloff <kurt@garloff.de>, 2006-09-04, GNU GPL
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dir=$(dirname "$0")
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. "$dir/block-common.sh"
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#command=$1
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#echo "DBG:xen/scripts/block-iscsi $1 $2 XENBUS_PATH=$XENBUS_PATH $par $node"
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#write_dev()
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#{
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# echo "$1"
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#}
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find_sdev()
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{
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unset dev
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for session in /sys/class/iscsi_session/session*; do
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if test $1 = `cat $session/targetname`; then
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dev=`readlink $session/device/target*/*:0:*/block*`
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dev=${dev##*/}
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return
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fi
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done
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}
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find_sdev_rev()
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{
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unset tgt
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for session in /sys/class/iscsi_session/session*; do
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dev=`readlink $session/device/target*/*:0:*/block*`
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dev=${dev##*/}
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if test $dev = $1; then
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tgt=`cat $session/targetname`
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return
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fi
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done
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}
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case "$command" in
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add)
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# load modules and start iscsid
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/etc/init.d/open-iscsi status >/dev/null 2>&1 ||
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{ /etc/init.d/open-iscsi start >/dev/null 2>&1; sleep 1; }
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# list of targets on node
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par=`xenstore-read $XENBUS_PATH/params` || true
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TGTID=$par; TGTID=${TGTID//@/:}
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while read rec port uuid; do
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if test $uuid = $TGTID; then
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rec=${rec%]}; rec=${rec#[}
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find_sdev $TGTID
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if test -z "$dev"; then
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iscsiadm -m node -r $rec -l || exit 2
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usleep 100000
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find_sdev $TGTID
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fi
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xenstore-write $XENBUS_PATH/node /dev/$dev
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write_dev /dev/$dev
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exit 0
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fi
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done < <(iscsiadm -m node)
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exit 1
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;;
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remove)
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node=`xenstore-read $XENBUS_PATH/node` || true
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dev=$node; dev=${dev#/dev/}
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find_sdev_rev $dev
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#echo $tgt
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if test -x /sbin/blockdev -a -n "$node"; then blockdev --flushbufs $node; fi
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test -z "$tgt" && exit 2
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while read rec port uuid; do
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if test $uuid = $tgt; then
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rec=${rec%]}; rec=${rec#[}
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iscsiadm -m node -r $rec -u
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exit 0
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fi
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done < <(iscsiadm -m node)
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exit 1
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;;
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esac
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