29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
101 lines
2.8 KiB
Nix
101 lines
2.8 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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{
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###### interface
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options = {
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system.sbin.modprobe = mkOption {
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internal = true;
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default = pkgs.writeTextFile {
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name = "modprobe";
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destination = "/sbin/modprobe";
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executable = true;
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text =
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''
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#! ${pkgs.stdenv.shell}
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export MODULE_DIR=/run/current-system/kernel-modules/lib/modules
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# Fall back to the kernel modules used at boot time if the
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# modules in the current configuration don't match the
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# running kernel.
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if [ ! -d "$MODULE_DIR/$(${pkgs.coreutils}/bin/uname -r)" ]; then
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MODULE_DIR=/run/booted-system/kernel-modules/lib/modules/
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fi
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exec ${pkgs.kmod}/sbin/modprobe "$@"
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'';
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};
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description = ''
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Wrapper around modprobe that sets the path to the modules
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tree.
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'';
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};
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boot.blacklistedKernelModules = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "cirrusfb" "i2c_piix4" ];
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description = ''
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List of names of kernel modules that should not be loaded
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automatically by the hardware probing code.
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'';
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};
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boot.extraModprobeConfig = mkOption {
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default = "";
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example =
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''
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options parport_pc io=0x378 irq=7 dma=1
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'';
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description = ''
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Any additional configuration to be appended to the generated
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<filename>modprobe.conf</filename>. This is typically used to
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specify module options. See
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<citerefentry><refentrytitle>modprobe.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry> for details.
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'';
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type = types.lines;
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};
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};
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###### implementation
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config = mkIf (!config.boot.isContainer) {
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environment.etc = [
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{ source = "${pkgs.kmod-blacklist-ubuntu}/modprobe.conf";
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target = "modprobe.d/ubuntu.conf";
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}
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{ source = pkgs.writeText "modprobe.conf"
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''
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${flip concatMapStrings config.boot.blacklistedKernelModules (name: ''
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blacklist ${name}
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'')}
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${config.boot.extraModprobeConfig}
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'';
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target = "modprobe.d/nixos.conf";
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}
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];
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environment.systemPackages = [ config.system.sbin.modprobe pkgs.kmod ];
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system.activationScripts.modprobe =
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''
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# Allow the kernel to find our wrapped modprobe (which searches
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# in the right location in the Nix store for kernel modules).
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# We need this when the kernel (or some module) auto-loads a
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# module.
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echo ${config.system.sbin.modprobe}/sbin/modprobe > /proc/sys/kernel/modprobe
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'';
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environment.variables.MODULE_DIR = "/run/current-system/kernel-modules/lib/modules";
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};
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}
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