nixos/network-interfaces: Support mac address and mtu universally
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2057d9087f
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@ -80,65 +80,44 @@ in
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'';
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};
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# For each interface <foo>, create a job ‘<foo>-cfg.service"
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# that performs static configuration. It has a "wants"
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# For each interface <foo>, create a job ‘network-addresses-<foo>.service"
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# that performs static address configuration. It has a "wants"
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# dependency on ‘<foo>.service’, which is supposed to create
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# the interface and need not exist (i.e. for hardware
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# interfaces). It has a binds-to dependency on the actual
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# network device, so it only gets started after the interface
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# has appeared, and it's stopped when the interface
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# disappears.
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configureInterface = i:
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configureAddrs = i:
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let
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ips = interfaceIps i;
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in
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nameValuePair "${i.name}-cfg"
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{ description = "Configuration of ${i.name}";
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nameValuePair "network-addresses-${i.name}"
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{ description = "Addresss configuration of ${i.name}";
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wantedBy = [ "network-interfaces.target" ];
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before = [ "network-interfaces.target" ];
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bindsTo = [ (subsystemDevice i.name) ];
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after = [ (subsystemDevice i.name) ];
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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path = [ pkgs.iproute pkgs.gawk ];
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script =
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''
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echo "bringing up interface..."
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ip link set "${i.name}" up
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''
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+ optionalString (i.macAddress != null)
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''
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echo "setting MAC address to ${i.macAddress}..."
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ip link set "${i.name}" address "${i.macAddress}"
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''
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+ optionalString (i.mtu != null)
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''
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echo "setting MTU to ${toString i.mtu}..."
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ip link set "${i.name}" mtu "${toString i.mtu}"
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''
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# Ip Setup
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+
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''
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curIps=$(ip -o a show dev "${i.name}" | awk '{print $4}')
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# Only do an add if it's necessary. This is
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# useful when the Nix store is accessed via this
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# interface (e.g. in a QEMU VM test).
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restart_network_interfaces=false
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''
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+ flip concatMapStrings (ips) (ip:
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restart_network_interfaces=false
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'' + flip concatMapStrings (ips) (ip:
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let
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address = "${ip.address}/${toString ip.prefixLength}";
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in
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''
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echo "checking ip ${address}..."
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if ! echo "$curIps" | grep "${address}" >/dev/null 2>&1; then
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if out=$(ip addr add "${address}" dev "${i.name}" 2>&1); then
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echo "added ip ${address}..."
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restart_network_setup=true
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elif ! echo "$out" | grep "File exists" >/dev/null 2>&1; then
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echo "failed to add ${address}"
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exit 1
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fi
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if out=$(ip addr add "${address}" dev "${i.name}" 2>&1); then
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echo "added ip ${address}..."
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restart_network_setup=true
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elif ! echo "$out" | grep "File exists" >/dev/null 2>&1; then
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echo "failed to add ${address}"
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exit 1
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fi
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'')
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+ optionalString (ips != [ ])
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@ -154,8 +133,7 @@ in
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preStop =
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''
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echo "releasing configured ip's..."
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''
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+ flip concatMapStrings (ips) (ip:
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'' + flip concatMapStrings (ips) (ip:
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let
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address = "${ip.address}/${toString ip.prefixLength}";
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in
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@ -321,7 +299,7 @@ in
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});
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in listToAttrs (
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map configureInterface interfaces ++
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map configureAddrs interfaces ++
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map createTunDevice (filter (i: i.virtual) interfaces))
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// mapAttrs' createBridgeDevice cfg.bridges
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// mapAttrs' createBondDevice cfg.bonds
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@ -59,15 +59,6 @@ in
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networks."99-main" = genericNetwork mkDefault;
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}
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(mkMerge (flip map interfaces (i: {
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links."40-${i.name}" = {
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matchConfig.Name = i.name;
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linkConfig =
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(optionalAttrs (i.macAddress != null) {
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MACAddress = i.macAddress;
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}) // (optionalAttrs (i.mtu != null) {
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MTUBytes = toString i.mtu;
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});
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};
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netdevs = mkIf i.virtual (
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let
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devType = if i.virtualType != null then i.virtualType
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@ -11,6 +11,10 @@ let
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hasSits = cfg.sits != { };
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hasBonds = cfg.bonds != { };
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# We must escape interfaces due to the systemd interpretation
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subsystemDevice = interface:
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"sys-subsystem-net-devices-${escapeSystemdPath interface}.device";
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addrOpts = v:
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assert v == 4 || v == 6;
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{
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@ -623,19 +627,42 @@ in
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++ optional hasVirtuals pkgs.tunctl
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++ optional cfg.enableIPv6 pkgs.ndisc6;
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systemd.services.network-local-commands = {
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description = "Extra networking commands.";
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before = [ "network.target" "network-online.target" ];
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wantedBy = [ "network.target" "network-online.target" ];
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unitConfig.ConditionCapability = "CAP_NET_ADMIN";
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path = [ pkgs.iproute ];
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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script = ''
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# Run any user-specified commands.
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${cfg.localCommands}
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'';
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};
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systemd.services = {
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network-local-commands = {
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description = "Extra networking commands.";
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before = [ "network.target" "network-online.target" ];
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wantedBy = [ "network.target" "network-online.target" ];
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unitConfig.ConditionCapability = "CAP_NET_ADMIN";
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path = [ pkgs.iproute ];
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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script = ''
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# Run any user-specified commands.
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${cfg.localCommands}
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'';
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};
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} // (listToAttrs (flip map interfaces (i:
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nameValuePair "network-link-${i.name}"
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{ description = "Link configuration of ${i.name}";
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wantedBy = [ "network-interfaces.target" ];
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before = [ "network-interfaces.target" ];
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bindsTo = [ (subsystemDevice i.name) ];
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after = [ (subsystemDevice i.name) ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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script =
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''
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echo "Configuring link..."
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'' + optionalString (i.macAddress != null) ''
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echo "setting MAC address to ${i.macAddress}..."
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ip link set "${i.name}" address "${i.macAddress}"
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'' + optionalString (i.mtu != null) ''
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echo "setting MTU to ${toString i.mtu}..."
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ip link set "${i.name}" mtu "${toString i.mtu}"
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'';
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})));
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};
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}
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