#!/bin/bash
 #

 # common functions for ovs based plugin
 # -------------------------------------
 
 # Save trace setting

 OVSB_XTRACE=$(set +o | grep xtrace)

 set +o xtrace
 

 OVS_BRIDGE=${OVS_BRIDGE:-br-int}

 # OVS recognize default 'system' datapath or 'netdev' for userspace datapath
 OVS_DATAPATH_TYPE=${OVS_DATAPATH_TYPE:-system}

 OVS_TUNNEL_BRIDGE=${OVS_TUNNEL_BRIDGE:-br-tun}

 function is_neutron_ovs_base_plugin {

     # Yes, we use OVS.
     return 0
 }
 

 function _neutron_ovs_base_add_bridge {
     local bridge=$1
     local addbr_cmd="sudo ovs-vsctl --no-wait -- --may-exist add-br $bridge"
 

     if [ "$OVS_DATAPATH_TYPE" != "system" ] ; then

         addbr_cmd="$addbr_cmd -- set Bridge $bridge datapath_type=${OVS_DATAPATH_TYPE}"
     fi
 
     $addbr_cmd
 }
 

 function _neutron_ovs_base_setup_bridge {

     local bridge=$1

     neutron-ovs-cleanup

     _neutron_ovs_base_add_bridge $bridge

     sudo ovs-vsctl --no-wait br-set-external-id $bridge bridge-id $bridge
 }
 

 function neutron_ovs_base_cleanup {

     # remove all OVS ports that look like Neutron created ports

     for port in $(sudo ovs-vsctl list port | grep -o -e [a-zA-Z\-]*tap[0-9a-f\-]* -e q[rg]-[0-9a-f\-]*); do

         sudo ovs-vsctl del-port ${port}
     done
 

     # remove all OVS bridges created by Neutron

     for bridge in $(sudo ovs-vsctl list-br | grep -o -e ${OVS_BRIDGE} -e ${PUBLIC_BRIDGE} -e ${OVS_TUNNEL_BRIDGE}); do

         sudo ovs-vsctl del-br ${bridge}
     done
 }
 

 function _neutron_ovs_base_install_ubuntu_dkms {
     # install Dynamic Kernel Module Support packages if needed

     local kernel_version
     kernel_version=$(uname -r)
     local kernel_major_minor
     kernel_major_minor=`echo $kernel_version | cut -d. -f1-2`

     # From kernel 3.13 on, openvswitch-datapath-dkms is not needed
     if [ `vercmp_numbers "$kernel_major_minor" "3.13"` -lt "0" ]; then
         install_package "dkms openvswitch-datapath-dkms linux-headers-$kernel_version"
     fi
 }
 

 function _neutron_ovs_base_install_agent_packages {

     # Install deps

     install_package $(get_packages "openvswitch")

     if is_ubuntu; then

         _neutron_ovs_base_install_ubuntu_dkms

         restart_service openvswitch-switch

     elif is_fedora; then
         restart_service openvswitch
     elif is_suse; then

         restart_service openvswitch-switch

     fi
 }
 

 function _neutron_ovs_base_configure_debug_command {

     if [ "$Q_USE_PROVIDERNET_FOR_PUBLIC" = "True" ]; then
         iniset $NEUTRON_TEST_CONFIG_FILE DEFAULT external_network_bridge ""
     else
         iniset $NEUTRON_TEST_CONFIG_FILE DEFAULT external_network_bridge $PUBLIC_BRIDGE
     fi

 }
 

 function _neutron_ovs_base_configure_firewall_driver {

     if [[ "$Q_USE_SECGROUP" == "True" ]]; then

         iniset /$Q_PLUGIN_CONF_FILE securitygroup firewall_driver neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver

     else

         iniset /$Q_PLUGIN_CONF_FILE securitygroup firewall_driver neutron.agent.firewall.NoopFirewallDriver

     fi
 }
 

 function _neutron_ovs_base_configure_l3_agent {

     if [ "$Q_USE_PROVIDERNET_FOR_PUBLIC" = "True" ]; then
         iniset $Q_L3_CONF_FILE DEFAULT external_network_bridge ""
     else
         iniset $Q_L3_CONF_FILE DEFAULT external_network_bridge $PUBLIC_BRIDGE
     fi

     neutron-ovs-cleanup

     if [[ "$Q_USE_PUBLIC_VETH" = "True" ]]; then
         ip link show $Q_PUBLIC_VETH_INT > /dev/null 2>&1 ||
         sudo ip link add $Q_PUBLIC_VETH_INT type veth \
             peer name $Q_PUBLIC_VETH_EX
         sudo ip link set $Q_PUBLIC_VETH_INT up
         sudo ip link set $Q_PUBLIC_VETH_EX up
         sudo ip addr flush dev $Q_PUBLIC_VETH_EX
     else

         _neutron_ovs_base_add_bridge $PUBLIC_BRIDGE

         sudo ovs-vsctl br-set-external-id $PUBLIC_BRIDGE bridge-id $PUBLIC_BRIDGE
     fi

 }
 

 function _neutron_ovs_base_configure_nova_vif_driver {

     :

 }
 

 # Restore xtrace

 $OVSB_XTRACE