nixpkgs/nixos/tests/systemd-initrd-modprobe.nix

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import ./make-test-python.nix ({ lib, pkgs, ... }: {
name = "systemd-initrd-modprobe";
nodes.machine = { pkgs, ... }: {
testing.initrdBackdoor = true;
boot.initrd.systemd.enable = true;
boot.initrd.kernelModules = [ "loop" ]; # Load module in initrd.
boot.extraModprobeConfig = ''
options loop max_loop=42
'';
};
testScript = ''
machine.wait_for_unit("initrd.target")
max_loop = machine.succeed("cat /sys/module/loop/parameters/max_loop")
assert int(max_loop) == 42, "Parameter should be respected for initrd kernel modules"
# Make sure it sticks in stage 2
machine.switch_root()
machine.wait_for_unit("multi-user.target")
max_loop = machine.succeed("cat /sys/module/loop/parameters/max_loop")
assert int(max_loop) == 42, "Parameter should be respected for initrd kernel modules"
'';
})