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f29ea2d15d
allows configuration of foo-over-udp decapsulation endpoints. sadly networkd seems to lack the features necessary to support local and peer address configuration, so those are only supported when using scripted configuration.
316 lines
14 KiB
Nix
316 lines
14 KiB
Nix
{ config, lib, utils, pkgs, ... }:
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with utils;
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with lib;
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let
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cfg = config.networking;
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interfaces = attrValues cfg.interfaces;
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interfaceIps = i:
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i.ipv4.addresses
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++ optionals cfg.enableIPv6 i.ipv6.addresses;
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dhcpStr = useDHCP: if useDHCP == true || useDHCP == null then "yes" else "no";
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slaves =
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concatLists (map (bond: bond.interfaces) (attrValues cfg.bonds))
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++ concatLists (map (bridge: bridge.interfaces) (attrValues cfg.bridges))
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++ map (sit: sit.dev) (attrValues cfg.sits)
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++ map (vlan: vlan.interface) (attrValues cfg.vlans)
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# add dependency to physical or independently created vswitch member interface
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# TODO: warn the user that any address configured on those interfaces will be useless
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++ concatMap (i: attrNames (filterAttrs (_: config: config.type != "internal") i.interfaces)) (attrValues cfg.vswitches);
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in
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{
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config = mkIf cfg.useNetworkd {
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assertions = [ {
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assertion = cfg.defaultGatewayWindowSize == null;
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message = "networking.defaultGatewayWindowSize is not supported by networkd.";
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} {
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assertion = cfg.defaultGateway == null || cfg.defaultGateway.interface == null;
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message = "networking.defaultGateway.interface is not supported by networkd.";
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} {
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assertion = cfg.defaultGateway6 == null || cfg.defaultGateway6.interface == null;
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message = "networking.defaultGateway6.interface is not supported by networkd.";
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} {
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assertion = cfg.useDHCP == false;
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message = ''
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networking.useDHCP is not supported by networkd.
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Please use per interface configuration and set the global option to false.
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'';
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} ] ++ flip mapAttrsToList cfg.bridges (n: { rstp, ... }: {
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assertion = !rstp;
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message = "networking.bridges.${n}.rstp is not supported by networkd.";
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}) ++ flip mapAttrsToList cfg.fooOverUDP (n: { local, ... }: {
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assertion = local == null;
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message = "networking.fooOverUDP.${n}.local is not supported by networkd.";
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});
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networking.dhcpcd.enable = mkDefault false;
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systemd.network =
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let
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domains = cfg.search ++ (optional (cfg.domain != null) cfg.domain);
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genericNetwork = override:
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let gateway = optional (cfg.defaultGateway != null && (cfg.defaultGateway.address or "") != "") cfg.defaultGateway.address
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++ optional (cfg.defaultGateway6 != null && (cfg.defaultGateway6.address or "") != "") cfg.defaultGateway6.address;
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in optionalAttrs (gateway != [ ]) {
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routes = override [
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{
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routeConfig = {
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Gateway = gateway;
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GatewayOnLink = false;
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};
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}
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];
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} // optionalAttrs (domains != [ ]) {
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domains = override domains;
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};
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in mkMerge [ {
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enable = true;
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}
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(mkMerge (forEach interfaces (i: {
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netdevs = mkIf i.virtual ({
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"40-${i.name}" = {
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netdevConfig = {
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Name = i.name;
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Kind = i.virtualType;
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};
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"${i.virtualType}Config" = optionalAttrs (i.virtualOwner != null) {
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User = i.virtualOwner;
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};
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};
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});
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networks."40-${i.name}" = mkMerge [ (genericNetwork mkDefault) {
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name = mkDefault i.name;
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DHCP = mkForce (dhcpStr
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(if i.useDHCP != null then i.useDHCP else false));
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address = forEach (interfaceIps i)
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(ip: "${ip.address}/${toString ip.prefixLength}");
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networkConfig.IPv6PrivacyExtensions = "kernel";
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linkConfig = optionalAttrs (i.macAddress != null) {
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MACAddress = i.macAddress;
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} // optionalAttrs (i.mtu != null) {
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MTUBytes = toString i.mtu;
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};
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}];
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})))
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(mkMerge (flip mapAttrsToList cfg.bridges (name: bridge: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "bridge";
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};
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};
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networks = listToAttrs (forEach bridge.interfaces (bi:
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nameValuePair "40-${bi}" (mkMerge [ (genericNetwork (mkOverride 999)) {
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DHCP = mkOverride 0 (dhcpStr false);
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networkConfig.Bridge = name;
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} ])));
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})))
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(mkMerge (flip mapAttrsToList cfg.bonds (name: bond: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "bond";
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};
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bondConfig = let
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# manual mapping as of 2017-02-03
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# man 5 systemd.netdev [BOND]
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# to https://www.kernel.org/doc/Documentation/networking/bonding.txt
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# driver options.
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driverOptionMapping = let
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trans = f: optName: { valTransform = f; optNames = [optName]; };
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simp = trans id;
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ms = trans (v: v + "ms");
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in {
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Mode = simp "mode";
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TransmitHashPolicy = simp "xmit_hash_policy";
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LACPTransmitRate = simp "lacp_rate";
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MIIMonitorSec = ms "miimon";
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UpDelaySec = ms "updelay";
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DownDelaySec = ms "downdelay";
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LearnPacketIntervalSec = simp "lp_interval";
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AdSelect = simp "ad_select";
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FailOverMACPolicy = simp "fail_over_mac";
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ARPValidate = simp "arp_validate";
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# apparently in ms for this value?! Upstream bug?
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ARPIntervalSec = simp "arp_interval";
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ARPIPTargets = simp "arp_ip_target";
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ARPAllTargets = simp "arp_all_targets";
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PrimaryReselectPolicy = simp "primary_reselect";
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ResendIGMP = simp "resend_igmp";
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PacketsPerSlave = simp "packets_per_slave";
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GratuitousARP = { valTransform = id;
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optNames = [ "num_grat_arp" "num_unsol_na" ]; };
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AllSlavesActive = simp "all_slaves_active";
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MinLinks = simp "min_links";
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};
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do = bond.driverOptions;
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assertNoUnknownOption = let
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knownOptions = flatten (mapAttrsToList (_: kOpts: kOpts.optNames)
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driverOptionMapping);
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# options that apparently don’t exist in the networkd config
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unknownOptions = [ "primary" ];
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assertTrace = bool: msg: if bool then true else builtins.trace msg false;
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in assert all (driverOpt: assertTrace
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(elem driverOpt (knownOptions ++ unknownOptions))
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"The bond.driverOption `${driverOpt}` cannot be mapped to the list of known networkd bond options. Please add it to the mapping above the assert or to `unknownOptions` should it not exist in networkd.")
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(mapAttrsToList (k: _: k) do); "";
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# get those driverOptions that have been set
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filterSystemdOptions = filterAttrs (sysDOpt: kOpts:
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any (kOpt: do ? ${kOpt}) kOpts.optNames);
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# build final set of systemd options to bond values
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buildOptionSet = mapAttrs (_: kOpts: with kOpts;
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# we simply take the first set kernel bond option
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# (one option has multiple names, which is silly)
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head (map (optN: valTransform (do.${optN}))
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# only map those that exist
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(filter (o: do ? ${o}) optNames)));
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in seq assertNoUnknownOption
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(buildOptionSet (filterSystemdOptions driverOptionMapping));
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};
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networks = listToAttrs (forEach bond.interfaces (bi:
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nameValuePair "40-${bi}" (mkMerge [ (genericNetwork (mkOverride 999)) {
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DHCP = mkOverride 0 (dhcpStr false);
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networkConfig.Bond = name;
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} ])));
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})))
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(mkMerge (flip mapAttrsToList cfg.macvlans (name: macvlan: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "macvlan";
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};
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macvlanConfig = optionalAttrs (macvlan.mode != null) { Mode = macvlan.mode; };
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};
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networks."40-${macvlan.interface}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
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macvlan = [ name ];
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} ]);
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})))
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(mkMerge (flip mapAttrsToList cfg.fooOverUDP (name: fou: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "fou";
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};
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# unfortunately networkd cannot encode dependencies of netdevs on addresses/routes,
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# so we cannot specify Local=, Peer=, PeerPort=. this looks like a missing feature
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# in networkd.
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fooOverUDPConfig = {
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Port = fou.port;
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Encapsulation = if fou.protocol != null then "FooOverUDP" else "GenericUDPEncapsulation";
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} // (optionalAttrs (fou.protocol != null) {
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Protocol = fou.protocol;
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});
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};
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})))
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(mkMerge (flip mapAttrsToList cfg.sits (name: sit: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "sit";
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};
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tunnelConfig =
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(optionalAttrs (sit.remote != null) {
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Remote = sit.remote;
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}) // (optionalAttrs (sit.local != null) {
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Local = sit.local;
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}) // (optionalAttrs (sit.ttl != null) {
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TTL = sit.ttl;
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});
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};
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networks = mkIf (sit.dev != null) {
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"40-${sit.dev}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
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tunnel = [ name ];
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} ]);
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};
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})))
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(mkMerge (flip mapAttrsToList cfg.vlans (name: vlan: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "vlan";
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};
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vlanConfig.Id = vlan.id;
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};
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networks."40-${vlan.interface}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
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vlan = [ name ];
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} ]);
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})))
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];
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# We need to prefill the slaved devices with networking options
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# This forces the network interface creator to initialize slaves.
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networking.interfaces = listToAttrs (map (i: nameValuePair i { }) slaves);
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systemd.services = let
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# We must escape interfaces due to the systemd interpretation
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subsystemDevice = interface:
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"sys-subsystem-net-devices-${escapeSystemdPath interface}.device";
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# support for creating openvswitch switches
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createVswitchDevice = n: v: nameValuePair "${n}-netdev"
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(let
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deps = map subsystemDevice (attrNames (filterAttrs (_: config: config.type != "internal") v.interfaces));
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ofRules = pkgs.writeText "vswitch-${n}-openFlowRules" v.openFlowRules;
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in
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{ description = "Open vSwitch Interface ${n}";
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wantedBy = [ "network.target" (subsystemDevice n) ];
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# and create bridge before systemd-networkd starts because it might create internal interfaces
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before = [ "systemd-networkd.service" ];
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# shutdown the bridge when network is shutdown
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partOf = [ "network.target" ];
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# requires ovs-vswitchd to be alive at all times
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bindsTo = [ "ovs-vswitchd.service" ];
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# start switch after physical interfaces and vswitch daemon
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after = [ "network-pre.target" "ovs-vswitchd.service" ] ++ deps;
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wants = deps; # if one or more interface fails, the switch should continue to run
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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path = [ pkgs.iproute2 config.virtualisation.vswitch.package ];
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preStart = ''
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echo "Resetting Open vSwitch ${n}..."
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ovs-vsctl --if-exists del-br ${n} -- add-br ${n} \
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-- set bridge ${n} protocols=${concatStringsSep "," v.supportedOpenFlowVersions}
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'';
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script = ''
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echo "Configuring Open vSwitch ${n}..."
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ovs-vsctl ${concatStrings (mapAttrsToList (name: config: " -- add-port ${n} ${name}" + optionalString (config.vlan != null) " tag=${toString config.vlan}") v.interfaces)} \
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${concatStrings (mapAttrsToList (name: config: optionalString (config.type != null) " -- set interface ${name} type=${config.type}") v.interfaces)} \
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${concatMapStrings (x: " -- set-controller ${n} " + x) v.controllers} \
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${concatMapStrings (x: " -- " + x) (splitString "\n" v.extraOvsctlCmds)}
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echo "Adding OpenFlow rules for Open vSwitch ${n}..."
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ovs-ofctl --protocols=${v.openFlowVersion} add-flows ${n} ${ofRules}
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'';
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postStop = ''
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echo "Cleaning Open vSwitch ${n}"
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echo "Shuting down internal ${n} interface"
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ip link set ${n} down || true
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echo "Deleting flows for ${n}"
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ovs-ofctl --protocols=${v.openFlowVersion} del-flows ${n} || true
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echo "Deleting Open vSwitch ${n}"
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ovs-vsctl --if-exists del-br ${n} || true
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'';
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});
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in mapAttrs' createVswitchDevice cfg.vswitches
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// {
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"network-local-commands" = {
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after = [ "systemd-networkd.service" ];
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bindsTo = [ "systemd-networkd.service" ];
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};
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};
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};
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}
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