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nixpkgs/nixos/modules/services/networking/rxe.nix

64 lines
1.6 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.networking.rxe;
runRxeCmd = cmd: ifcs:
concatStrings ( map (x: "${pkgs.rdma-core}/bin/rxe_cfg -n ${cmd} ${x};") ifcs);
startScript = pkgs.writeShellScriptBin "rxe-start" ''
${pkgs.rdma-core}/bin/rxe_cfg -n start
${runRxeCmd "add" cfg.interfaces}
${pkgs.rdma-core}/bin/rxe_cfg
'';
stopScript = pkgs.writeShellScriptBin "rxe-stop" ''
${runRxeCmd "remove" cfg.interfaces }
${pkgs.rdma-core}/bin/rxe_cfg -n stop
'';
in {
###### interface
options = {
networking.rxe = {
enable = mkEnableOption "RDMA over converged ethernet";
interfaces = mkOption {
type = types.listOf types.str;
default = [ ];
example = [ "eth0" ];
description = ''
Enable RDMA on the listed interfaces. The corresponding virtual
RDMA interfaces will be named rxe0 ... rxeN where the ordering
will be as they are named in the list. UDP port 4791 must be
open on the respective ethernet interfaces.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
systemd.services.rxe = {
path = with pkgs; [ kmod rdma-core ];
description = "RoCE interfaces";
wantedBy = [ "multi-user.target" ];
after = [ "systemd-modules-load.service" "network-online.target" ];
wants = [ "network-pre.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${startScript}/bin/rxe-start";
ExecStop = "${stopScript}/bin/rxe-stop";
};
};
};
}