#!/bin/bash
#
# Neutron Open vSwitch L2 agent
# -----------------------------

# Save trace setting
_XTRACE_NEUTRON_OVSL2=$(set +o | grep xtrace)
set +o xtrace

source $TOP_DIR/lib/neutron_plugins/ovs_base

function neutron_plugin_create_nova_conf {
    _neutron_ovs_base_configure_nova_vif_driver
    if [ "$VIRT_DRIVER" == 'xenserver' ]; then
        iniset $NOVA_CONF xenserver vif_driver nova.virt.xenapi.vif.XenAPIOpenVswitchDriver
        iniset $NOVA_CONF xenserver ovs_integration_bridge $XEN_INTEGRATION_BRIDGE
        # Disable nova's firewall so that it does not conflict with neutron
        iniset $NOVA_CONF DEFAULT firewall_driver nova.virt.firewall.NoopFirewallDriver
    fi
}

function neutron_plugin_install_agent_packages {
    _neutron_ovs_base_install_agent_packages
}

function neutron_plugin_configure_debug_command {
    _neutron_ovs_base_configure_debug_command
}

function neutron_plugin_configure_dhcp_agent {
    iniset $Q_DHCP_CONF_FILE DEFAULT dhcp_agent_manager neutron.agent.dhcp_agent.DhcpAgentWithStateReport
}

function neutron_plugin_configure_l3_agent {
    _neutron_ovs_base_configure_l3_agent
    iniset $Q_L3_CONF_FILE DEFAULT l3_agent_manager neutron.agent.l3_agent.L3NATAgentWithStateReport
}

function neutron_plugin_configure_plugin_agent {
    local mappings_array mapping phys_bridge
    # Setup integration bridge
    _neutron_ovs_base_setup_bridge $OVS_BRIDGE
    _neutron_ovs_base_configure_firewall_driver

    # Setup agent for tunneling
    if [[ "$OVS_ENABLE_TUNNELING" == "True" ]]; then
        # Verify tunnels are supported
        # REVISIT - also check kernel module support for GRE and patch ports
        OVS_VERSION=`ovs-vsctl --version | head -n 1 | grep -E -o "[0-9]+\.[0-9]+"`
        if [ `vercmp_numbers "$OVS_VERSION" "1.4"` -lt "0" ] && ! is_service_enabled q-svc ; then
            die $LINENO "You are running OVS version $OVS_VERSION. OVS 1.4+ is required for tunneling between multiple hosts."
        fi
        iniset /$Q_PLUGIN_CONF_FILE ovs local_ip $TUNNEL_ENDPOINT_IP
        iniset /$Q_PLUGIN_CONF_FILE ovs tunnel_bridge $OVS_TUNNEL_BRIDGE
    fi

    # Setup physical network bridge mappings.  Override
    # ``OVS_VLAN_RANGES`` and ``OVS_BRIDGE_MAPPINGS`` in ``localrc`` for more
    # complex physical network configurations.
    if [[ "$OVS_BRIDGE_MAPPINGS" == "" ]] && [[ "$PHYSICAL_NETWORK" != "" ]] && [[ "$OVS_PHYSICAL_BRIDGE" != "" ]]; then
        OVS_BRIDGE_MAPPINGS=$PHYSICAL_NETWORK:$OVS_PHYSICAL_BRIDGE
    fi

    if [[ "$OVS_BRIDGE_MAPPINGS" != "" ]]; then
        IFS=',' read -a mappings_array <<< "$OVS_BRIDGE_MAPPINGS"
        for mapping in "${mappings_array[@]}"; do
            phys_bridge=`echo $mapping | cut -f 2 -d ":"`
            # Configure bridge manually with physical interface as port for multi-node
            _neutron_ovs_base_add_bridge $phys_bridge
        done
    fi
    if [[ "$OVS_BRIDGE_MAPPINGS" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE ovs bridge_mappings $OVS_BRIDGE_MAPPINGS
    fi
    AGENT_BINARY="$NEUTRON_BIN_DIR/neutron-openvswitch-agent"

    if [ "$VIRT_DRIVER" == 'xenserver' ]; then
        # Make a copy of our config for domU
        sudo cp /$Q_PLUGIN_CONF_FILE "/$Q_PLUGIN_CONF_FILE.domU"

        # change domU's config file to STACK_USER
        sudo chown $STACK_USER:$STACK_USER /$Q_PLUGIN_CONF_FILE.domU

        # Deal with Dom0's L2 Agent:
        Q_RR_DOM0_COMMAND="$NEUTRON_BIN_DIR/neutron-rootwrap-xen-dom0 $Q_RR_CONF_FILE"

        # For now, duplicate the xen configuration already found in nova.conf
        iniset $Q_RR_CONF_FILE xenapi xenapi_connection_url "$XENAPI_CONNECTION_URL"
        iniset $Q_RR_CONF_FILE xenapi xenapi_connection_username "$XENAPI_USER"
        iniset $Q_RR_CONF_FILE xenapi xenapi_connection_password "$XENAPI_PASSWORD"

        # Under XS/XCP, the ovs agent needs to target the dom0
        # integration bridge.  This is enabled by using a root wrapper
        # that executes commands on dom0 via a XenAPI plugin.
        # XenAPI does not support daemon rootwrap now, so set root_helper_daemon empty
        iniset /$Q_PLUGIN_CONF_FILE agent root_helper "$Q_RR_DOM0_COMMAND"
        iniset /$Q_PLUGIN_CONF_FILE agent root_helper_daemon ""

        # Disable minimize polling, so that it can always detect OVS and Port changes
        # This is a problem of xenserver + neutron, bug has been reported
        # https://bugs.launchpad.net/neutron/+bug/1495423
        iniset /$Q_PLUGIN_CONF_FILE agent minimize_polling False

        # Set "physical" mapping
        iniset /$Q_PLUGIN_CONF_FILE ovs bridge_mappings "physnet1:$FLAT_NETWORK_BRIDGE"

        # XEN_INTEGRATION_BRIDGE is the integration bridge in dom0
        iniset /$Q_PLUGIN_CONF_FILE ovs integration_bridge $XEN_INTEGRATION_BRIDGE

        # Set up domU's L2 agent:

        # Create a bridge "br-$GUEST_INTERFACE_DEFAULT"
        _neutron_ovs_base_add_bridge "br-$GUEST_INTERFACE_DEFAULT"
        # Add $GUEST_INTERFACE_DEFAULT to that bridge
        sudo ovs-vsctl -- --may-exist add-port "br-$GUEST_INTERFACE_DEFAULT" $GUEST_INTERFACE_DEFAULT

        # Create external bridge and add port
        _neutron_ovs_base_add_bridge $PUBLIC_BRIDGE
        sudo ovs-vsctl -- --may-exist add-port $PUBLIC_BRIDGE $PUBLIC_INTERFACE_DEFAULT

        # Set bridge mappings to "physnet1:br-$GUEST_INTERFACE_DEFAULT"
        iniset "/$Q_PLUGIN_CONF_FILE.domU" ovs bridge_mappings "physnet1:br-$GUEST_INTERFACE_DEFAULT,physnet-ex:$PUBLIC_BRIDGE"
        # Set integration bridge to domU's
        iniset "/$Q_PLUGIN_CONF_FILE.domU" ovs integration_bridge $OVS_BRIDGE
        # Set root wrap
        iniset "/$Q_PLUGIN_CONF_FILE.domU" agent root_helper "$Q_RR_COMMAND"
    fi
    iniset /$Q_PLUGIN_CONF_FILE agent tunnel_types $Q_TUNNEL_TYPES
    iniset /$Q_PLUGIN_CONF_FILE ovs datapath_type $OVS_DATAPATH_TYPE
}

function neutron_plugin_setup_interface_driver {
    local conf_file=$1
    iniset $conf_file DEFAULT interface_driver openvswitch
}

function neutron_plugin_check_adv_test_requirements {
    is_service_enabled q-agt && is_service_enabled q-dhcp && return 0
}

# Restore xtrace
$_XTRACE_NEUTRON_OVSL2