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#!/bin/bash
#============================================================================
# Default Xen network start/stop script.
# Xend calls a network script when it starts.
# The script name to use is defined in ${XEN_CONFIG_DIR}/xend-config.sxp
# in the network-script field.
#
# This script creates a virtual switch (default ${netdev}) and adds a
# device (defaults to eth0) to it. The interface that this Open vSwitch
# is created on should not have a working IP address and will be used as
# a switch for Xen domU's.
#
# Usage:
# network-openvswitch (start|stop|status) {VAR=VAL}*
#
# Vars:
# bridge The bridge to use (default xenvs0).
# netdev The interface to add to the bridge (default eth0). This
# device should not be configured with an IP address. If so
# this script will tear down the interface and bring it back up
# without an IP address.
#
# start:
# Creates the bridge as bridge
# Enslaves netdev to bridge
#
# stop:
# Removes netdev from the bridge
# Deletes bridge
#
# status:
# Print addresses, interfaces
#
#============================================================================
dir=$(dirname "$0")
. "$dir/logging.sh"
. "$dir/xen-script-common.sh"
. "$dir/xen-network-common.sh"
. "$dir/locking.sh"
findCommand "$@"
evalVariables "$@"
netdev=${netdev:-eth0}
bridge=${bridge:-ovs0}
addr=`ip addr show dev ${netdev} | egrep '^ *inet' | sed -e 's/ *inet //' -e 's/ .*//'`
if [ -n "$addr" ]; then
echo "Invalid device: ${netdev} is up and has a valid IP address!" >&2
exit 1
fi
show_status () {
local dev=$1
local bridge=$2
echo '============================================================'
echo 'vSwitch interfaces'
ovs-vsctl list-ifaces ${bridge}
echo ' '
echo 'vSwitch ports'
ovs-vsctl list-ports ${bridge}
echo '============================================================'
}
op_start () {
if [ "${bridge}" = "null" ] ; then
return
fi
ifconfig "${netdev}" down
ifconfig "${netdev}" 0.0.0.0 up
ovs-vsctl -- --may-exist add-br ${bridge}
ifconfig "${bridge}" 0.0.0.0 up
ovs-vsctl -- --may-exist add-port ${bridge} ${netdev}
# Remove any stale ports from last time virtual switch was running.
# Open vSwitch has the habit of remembering port settings between
# runs.
for port in $(ovs-vsctl list-ports ${bridge})
do
if [ "${port}" != "${netdev}" ]
then
ifconfig "${port}" down
ovs-vsctl del-port ${port}
fi
done
}
op_stop () {
if [ "${bridge}" = "null" ]; then
return
fi
# Remove all ports from virtual switch.
for port in $(ovs-vsctl list-ports ${bridge})
do
ifconfig "${port}" down
ovs-vsctl del-port ${port}
done
ifconfig "${bridge}" down
ovs-vsctl -- --if-exists del-br ${bridge}
}
case "$command" in
start)
op_start
;;
stop)
op_stop
;;
status)
show_status ${netdev} ${bridge}
;;
*)
echo "Unknown command: $command" >&2
echo 'Valid commands are: start, stop, status' >&2
exit 1
esac
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