57 lines
1.3 KiB
Nix
57 lines
1.3 KiB
Nix
{ config, pkgs, ... }:
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let
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inherit (pkgs.lib) mkOption mkIf;
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cfg = config.environment.blcr;
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kernelPkgs = config.boot.kernelPackages;
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blcrPkg = kernelPkgs.blcr;
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insmod = "${pkgs.module_init_tools}/sbin/insmod";
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rmmod = "${pkgs.module_init_tools}/sbin/rmmod";
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modulesDir = "${blcrPkg}/lib/modules/${kernelPkgs.kernel.version}";
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blcr_imports_ko = "${modulesDir}/blcr_imports.ko";
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blcr_ko = "${modulesDir}/blcr.ko";
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in
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{
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###### interface
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options = {
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environment.blcr.enable = mkOption {
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default = false;
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description =
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"Wheter to enable support for the BLCR checkpointing tool.";
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};
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environment.blcr.autorun = mkOption {
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default = true;
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description =
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"Whether to load BLCR kernel modules automatically at boot.";
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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environment.systemPackages = [ blcrPkg ];
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jobs.blcr = {
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name = "blcr";
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description = "Loads BLCR kernel modules";
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task = true;
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startOn = if cfg.autorun then "started udev" else null;
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preStart = ''
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${insmod} ${blcr_imports_ko}
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${insmod} ${blcr_ko}
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'';
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postStop = ''
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${rmmod} ${blcr_ko}
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${rmmod} ${blcr_imports_ko}
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'';
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};
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};
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}
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