#!/bin/bash

# Copyright 2015 VMware, Inc.
#
# All Rights Reserved
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.


# Neutron VMware NSX plugin
# -------------------------

# Settings previously defined in devstack:lib/neutron-legacy
NEUTRON_CONF_DIR=/etc/neutron
export NEUTRON_TEST_CONFIG_FILE=${NEUTRON_TEST_CONFIG_FILE:-"$NEUTRON_CONF_DIR/debug.ini"}
Q_DHCP_CONF_FILE=$NEUTRON_CONF_DIR/dhcp_agent.ini
Q_META_DATA_IP=${Q_META_DATA_IP:-$SERVICE_HOST}

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

source $TOP_DIR/lib/neutron_plugins/ovs_base

function setup_integration_bridge {
    _neutron_ovs_base_setup_bridge $OVS_BRIDGE
    # Set manager to NSX controller (1st of list)
    if [[ "$NSX_CONTROLLERS" != "" ]]; then
        # Get the first controller
        controllers=(${NSX_CONTROLLERS//,/ })
        OVS_MGR_IP=${controllers[0]}
    else
        die $LINENO "Error - No controller specified. Unable to set a manager for OVS"
    fi
    sudo ovs-vsctl set-manager ssl:$OVS_MGR_IP
}

function is_neutron_ovs_base_plugin {
    # NSX uses OVS, but not the l3-agent
    return 0
}

function neutron_plugin_create_nova_conf {
    # if n-cpu is enabled, then setup integration bridge
    if is_service_enabled n-cpu; then
        setup_integration_bridge
    fi
}

function neutron_plugin_install_agent_packages {
    # VMware NSX Plugin does not run q-agt, but it currently needs dhcp and metadata agents
    _neutron_ovs_base_install_agent_packages
}

function neutron_plugin_configure_common {
    Q_PLUGIN_CONF_PATH=etc/neutron/plugins/vmware
    Q_PLUGIN_CONF_FILENAME=nsx.ini
    Q_PLUGIN_SRC_CONF_PATH=vmware-nsx/etc
    VMWARE_NSX_DIR=vmware-nsx
    # Uses oslo config generator to generate sample configuration file
    (cd $DEST/$VMWARE_NSX_DIR && exec ./tools/generate_config_file_samples.sh)
    mkdir -p /$Q_PLUGIN_CONF_PATH
    cp $DEST/$Q_PLUGIN_SRC_CONF_PATH/nsx.ini.sample /$Q_PLUGIN_CONF_PATH/$Q_PLUGIN_CONF_FILENAME
    Q_PLUGIN_CLASS="vmware_nsx"
}

function neutron_plugin_configure_debug_command {
    sudo ovs-vsctl --no-wait -- --may-exist add-br $PUBLIC_BRIDGE
}

function neutron_plugin_configure_dhcp_agent {
    setup_integration_bridge
    iniset $Q_DHCP_CONF_FILE DEFAULT enable_isolated_metadata True
    iniset $Q_DHCP_CONF_FILE DEFAULT enable_metadata_network True
    iniset $Q_DHCP_CONF_FILE DEFAULT ovs_use_veth True
    iniset $Q_DHCP_CONF_FILE DEFAULT ovs_integration_bridge $OVS_BRIDGE
}

function neutron_plugin_configure_l3_agent {
    # VMware NSX plugin does not run L3 agent
    die $LINENO "q-l3 should not be executed with VMware NSX plugin!"
}

function neutron_plugin_configure_plugin_agent {
    # VMware NSX plugin does not run L2 agent
    die $LINENO "q-agt must not be executed with VMware NSX plugin!"
}

function neutron_plugin_configure_service {
    if [[ "$MAX_LP_PER_BRIDGED_LS" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE nsx max_lp_per_bridged_ls $MAX_LP_PER_BRIDGED_LS
    fi
    if [[ "$MAX_LP_PER_OVERLAY_LS" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE nsx max_lp_per_overlay_ls $MAX_LP_PER_OVERLAY_LS
    fi
    if [[ "$FAILOVER_TIME" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE nsx failover_time $FAILOVER_TIME
    fi
    if [[ "$CONCURRENT_CONNECTIONS" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE nsx concurrent_connections $CONCURRENT_CONNECTIONS
    fi

    if [[ "$DEFAULT_TZ_UUID" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT default_tz_uuid $DEFAULT_TZ_UUID
    else
        die $LINENO "The VMware NSX plugin won't work without a default transport zone."
    fi
    if [[ "$DEFAULT_L3_GW_SVC_UUID" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT default_l3_gw_service_uuid $DEFAULT_L3_GW_SVC_UUID
        Q_L3_ENABLED=True
        Q_L3_ROUTER_PER_TENANT=True
        iniset /$Q_PLUGIN_CONF_FILE nsx metadata_mode access_network
    fi
    if [[ "$DEFAULT_L2_GW_SVC_UUID" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT default_l2_gw_service_uuid $DEFAULT_L2_GW_SVC_UUID
    fi
    # NSX_CONTROLLERS must be a comma separated string
    if [[ "$NSX_CONTROLLERS" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT nsx_controllers $NSX_CONTROLLERS
    else
        die $LINENO "The VMware NSX plugin needs at least an NSX controller."
    fi
    if [[ "$NSX_USER" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT nsx_user $NSX_USER
    fi
    if [[ "$NSX_PASSWORD" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT nsx_password $NSX_PASSWORD
    fi
    if [[ "$NSX_HTTP_TIMEOUT" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT http_timeout $NSX_HTTP_TIMEOUT
    fi
    if [[ "$NSX_RETRIES" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT retries $NSX_RETRIES
    fi
    if [[ "$NSX_REDIRECTS" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE DEFAULT redirects $NSX_REDIRECTS
    fi
    if [[ "$AGENT_MODE" != "" ]]; then
        iniset /$Q_PLUGIN_CONF_FILE nsx agent_mode $AGENT_MODE
        if [[ "$AGENT_MODE" == "agentless" ]]; then
            if [[ "$DEFAULT_SERVICE_CLUSTER_UUID" != "" ]]; then
                iniset /$Q_PLUGIN_CONF_FILE DEFAULT default_service_cluster_uuid $DEFAULT_SERVICE_CLUSTER_UUID
            else
                die $LINENO "Agentless mode requires a service cluster."
            fi
            iniset /$Q_PLUGIN_CONF_FILE nsx_metadata metadata_server_address $Q_META_DATA_IP
        fi
    fi
}

function neutron_plugin_setup_interface_driver {
    local conf_file=$1
    iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.OVSInterfaceDriver
}

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

function init_vmware_nsx {
    if ! is_set NSX_GATEWAY_NETWORK_CIDR; then
        NSX_GATEWAY_NETWORK_CIDR=$PUBLIC_NETWORK_GATEWAY/${FLOATING_RANGE#*/}
        echo "The IP address to set on $PUBLIC_BRIDGE was not specified. "
        echo "Defaulting to "$NSX_GATEWAY_NETWORK_CIDR
    fi
    # Make sure the interface is up, but not configured
    sudo ip link set $NSX_GATEWAY_NETWORK_INTERFACE up
    # Save and then flush the IP addresses on the interface
    addresses=$(ip addr show dev $NSX_GATEWAY_NETWORK_INTERFACE | grep inet | awk {'print $2'})
    sudo ip addr flush $NSX_GATEWAY_NETWORK_INTERFACE
    # Use the PUBLIC Bridge to route traffic to the NSX gateway
    # NOTE(armando-migliaccio): if running in a nested environment this will work
    # only with mac learning enabled, portsecurity and security profiles disabled
    # The public bridge might not exist for the NSX plugin if Q_USE_DEBUG_COMMAND is off
    # Try to create it anyway
    sudo ovs-vsctl --may-exist add-br $PUBLIC_BRIDGE
    sudo ovs-vsctl --may-exist add-port $PUBLIC_BRIDGE $NSX_GATEWAY_NETWORK_INTERFACE
    # Flush all existing addresses on public bridge
    sudo ip addr flush dev $PUBLIC_BRIDGE
    nsx_gw_net_if_mac=$(ip link show $NSX_GATEWAY_NETWORK_INTERFACE | awk '/ether/ {print $2}')
    sudo ip link set address $nsx_gw_net_if_mac dev $PUBLIC_BRIDGE
    for address in $addresses; do
        sudo ip addr add dev $PUBLIC_BRIDGE $address
    done
    sudo ip addr add dev $PUBLIC_BRIDGE $NSX_GATEWAY_NETWORK_CIDR
    sudo ip link set $PUBLIC_BRIDGE up
}


function stop_vmware_nsx {
    if ! is_set NSX_GATEWAY_NETWORK_CIDR; then
        NSX_GATEWAY_NETWORK_CIDR=$PUBLIC_NETWORK_GATEWAY/${FLOATING_RANGE#*/}
        echo "The IP address expected on $PUBLIC_BRIDGE was not specified. "
        echo "Defaulting to "$NSX_GATEWAY_NETWORK_CIDR
    fi
    sudo ip addr del $NSX_GATEWAY_NETWORK_CIDR dev $PUBLIC_BRIDGE
    # Save and then flush remaining addresses on the interface
    addresses=$(ip addr show dev $PUBLIC_BRIDGE | grep inet | awk {'print $2'})
    sudo ip addr flush $PUBLIC_BRIDGE
    # Try to detach physical interface from PUBLIC_BRIDGE
    sudo ovs-vsctl del-port $NSX_GATEWAY_NETWORK_INTERFACE
    # Restore addresses on NSX_GATEWAY_NETWORK_INTERFACE
    for address in $addresses; do
        sudo ip addr add dev $NSX_GATEWAY_NETWORK_INTERFACE $address
    done
}

function check_vmware_nsx {
    neutron-check-nsx-config $NEUTRON_CONF_DIR/plugins/vmware/nsx.ini
}

# Restore xtrace
$NSX_XTRACE