# networking - configure virtual network devices
#
# This task causes virtual network devices that do not have an associated
# kernel object to be started on boot.

description	"configure virtual network devices"

emits static-network-up
emits net-device-up
emits deconfiguring-networking

start on local-filesystems
stop on unmounted-remote-filesystems

pre-start script
    if [ "$UPSTART_EVENTS" = "stopped" ] && [ "$UPSTART_JOB" = "networking" ] && [ "$EXIT_STATUS" = "100" ]; then
        exit 0
    fi

    mkdir -p /run/network
    ifup -a
end script

post-stop script
    if [ -z "$UPSTART_STOP_EVENTS" ]; then
        echo "Stopping or restarting the networking job is not supported."
        echo "Use ifdown & ifup to reconfigure desired interface."
        exit 100
    fi

    log_warning_msg() {
        echo $*
    }

    # These checks were taken from the Debian ifupdown.networking.init script
    check_network_file_systems() {
        [ -e /proc/mounts ] || return 0

        if [ -e /etc/iscsi/iscsi.initramfs ]; then
            log_warning_msg "not deconfiguring network interfaces: iSCSI root is mounted."
            exit 0
        fi

        while read DEV MTPT FSTYPE REST; do
            case $DEV in
            /dev/nbd*|/dev/nd[a-z]*|/dev/etherd/e*)
                log_warning_msg "not deconfiguring network interfaces: network devices still mounted."
                exit 0
                ;;
            esac
            case $FSTYPE in
            nfs|nfs4|smbfs|ncp|ncpfs|cifs|coda|ocfs2|gfs|pvfs|pvfs2|fuse.httpfs|fuse.curlftpfs)
                log_warning_msg "not deconfiguring network interfaces: network file systems still mounted."
                exit 0
                ;;
            esac
        done < /proc/mounts
    }

    check_network_swap() {
        [ -e /proc/swaps ] || return 0

        while read DEV MTPT FSTYPE REST; do
            case $DEV in
            /dev/nbd*|/dev/nd[a-z]*|/dev/etherd/e*)
                log_warning_msg "not deconfiguring network interfaces: network swap still mounted."
                exit 0
                ;;
            esac
        done < /proc/swaps
    }

    check_network_file_systems
    check_network_swap

    # Anything that manages network interfaces *MUST* wait for this event
    initctl emit deconfiguring-networking
    ifdown -a --exclude=lo
end script