nixpkgs/nixos/tests/rxe.nix

import ./make-test-python.nix ({ ... } :

let
  node = { pkgs, ... } : {
    networking = {
      firewall = {
        allowedUDPPorts = [ 4791 ]; # open RoCE port
        allowedTCPPorts = [ 4800 ]; # port for test utils
      };
      rxe = {
        enable = true;
        interfaces = [ "eth1" ];
      };
    };

    environment.systemPackages = with pkgs; [ rdma-core screen ];
  };

in {
  name = "rxe";

  nodes = {
    server = node;
    client = node;
  };

  testScript = ''
    # Test if rxe interface comes up
    server.wait_for_unit("default.target")
    server.succeed("systemctl status rxe.service")
    server.succeed("ibv_devices | grep rxe0")

    client.wait_for_unit("default.target")

    # ping pong tests
    for proto in "rc", "uc", "ud", "srq":
        server.succeed(
            "screen -dmS {0}_pingpong ibv_{0}_pingpong -p 4800 -s 1024 -g0".format(proto)
        )
        client.succeed("sleep 2; ibv_{}_pingpong -p 4800 -s 1024 -g0 server".format(proto))

    server.succeed("screen -dmS rping rping -s -a server -C 10")
    client.succeed("sleep 2; rping -c -a server -C 10")
  '';
})