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#!/bin/bash
# Copyright (c) 2005 IBM Corporation
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
set -x
# This script is called by XenD for migration of external devices
# It does not handle the migration of those devices itself, but
# passes the requests on to further applications
# It handles the low-level command line parsing and some of the
# synchronization
dir=$(dirname "$0")
. "$dir/logging.sh"
function ext_dev_migrate_usage() {
cat <<EOF
Pass the following command line parameters to the script:
-step <n> : n-th migration step
-host <host> : the destination host
-domname <domain name> : name of the domain that is migrating
-type <device type> : the type of device that is migrating
-subtype <dev. subtype>: the subtype of the device
-recover : indicates recovery request; an error
occurred during migration
-help : display this help screen
EOF
}
# Parse the command line paramters. The following parameters must be
# passed as the first ones in the sequence:
# -step [required]
# -host [required]
# -domname [required]
# -type [required]
# -subtype [optional]
# -recover [optional]
# The remaining ones will be passed to the called function.
function evaluate_params()
{
local step host domname typ recover filename func stype
stype=""
while [ $# -ge 1 ]; do
case "$1" in
-step) step=$2; shift; shift;;
-host) host=$2; shift; shift;;
-domname) domname=$2; shift; shift;;
-type) typ=$2; shift; shift;;
-subtype) stype=$2; shift; shift;;
-recover) recover=1; shift;;
-help) ext_dev_migrate_usage; exit 0;;
*) break;;
esac
done
if [ "$step" = "" -o \
"$host" = "" -o \
"$typ" = "" -o \
"$domname" = "" ]; then
echo "Error: Parameter(s) missing (-step/-host/-type/-domname)" 1>&2
echo "" 1>&2
echo "$0 -help for usage." 1>&2
exit 1
fi
filename="$dir/$typ$stype-migration.sh"
if [ ! -r $filename ]; then
echo "Error: Could not find script '$filename'"
return
fi
. "$filename"
if [ "$recover" = "1" ]; then
func="$typ"_recover
eval $func $host $domname $step $*
else
func="$typ"_migration_step
eval $func $host $domname $step $*
fi
}
evaluate_params "$@"
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