Merge pull request #5615 from nckx/freefall
Add freefall: hard drive protection on HP/Dell laptops
This commit is contained in:
commit
a15edc22e3
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@ -144,6 +144,7 @@
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./services/hardware/acpid.nix
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./services/hardware/amd-hybrid-graphics.nix
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./services/hardware/bluetooth.nix
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./services/hardware/freefall.nix
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./services/hardware/nvidia-optimus.nix
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./services/hardware/pcscd.nix
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./services/hardware/pommed.nix
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62
nixos/modules/services/hardware/freefall.nix
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62
nixos/modules/services/hardware/freefall.nix
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{ config, lib, pkgs, utils, ... }:
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with lib;
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{
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###### interface
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options = with types; {
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services.freefall = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to protect HP/Dell laptop hard drives (not SSDs) in free fall.
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'';
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type = bool;
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};
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devices = mkOption {
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default = [ "/dev/sda" ];
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description = ''
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Device paths to all internal spinning hard drives.
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'';
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type = listOf string;
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};
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};
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};
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###### implementation
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config = let
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cfg = config.services.freefall;
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mkService = dev:
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assert dev != "";
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let dev' = utils.escapeSystemdPath dev; in
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nameValuePair "freefall-${dev'}"
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{ description = "Free-fall protection for ${dev}";
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after = [ "${dev'}.device" ];
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wantedBy = [ "${dev'}.device" ];
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path = [ pkgs.freefall ];
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serviceConfig = {
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ExecStart = "${pkgs.freefall}/bin/freefall ${dev}";
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Restart = "on-failure";
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Type = "forking";
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};
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};
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in mkIf cfg.enable {
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environment.systemPackages = [ pkgs.freefall ];
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systemd.services = listToAttrs (map mkService cfg.devices);
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};
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}
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42
pkgs/os-specific/linux/freefall/default.nix
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42
pkgs/os-specific/linux/freefall/default.nix
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{ stdenv, fetchurl }:
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stdenv.mkDerivation rec {
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version = "3.18.3";
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name = "freefall-${version}";
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src = fetchurl {
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url = "mirror://kernel/linux/kernel/v3.x/linux-${version}.tar.xz";
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sha256 = "0ma2x68975xsi9kb15p0615nx9sm5ppb309kfdz7fgx9pg84q0hf";
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};
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buildPhase = ''
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cd Documentation/laptops
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# Default time-out is a little low, probably because the AC/lid status
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# functions were never implemented. Because no-one still uses HDDs, right?
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substituteInPlace freefall.c --replace "alarm(2)" "alarm(5)"
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cc -o freefall freefall.c
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'';
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installPhase = ''
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mkdir -p $out/bin
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install freefall $out/bin
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'';
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meta = with stdenv.lib; {
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description = "Free-fall protection for spinning HP/Dell laptop hard drives";
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longDescription = ''
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ATA/ATAPI-7 specifies the IDLE IMMEDIATE command with unload feature.
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Issuing this command should cause the drive to switch to idle mode and
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unload disk heads. This feature is being used in modern laptops in
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conjunction with accelerometers and appropriate software to implement
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a shock protection facility. The idea is to stop all I/O operations on
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the internal hard drive and park its heads on the ramp when critical
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situations are anticipated. This has no effect on SSD devices!
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'';
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license = with licenses; gpl2;
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platforms = with platforms; linux;
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maintainers = with maintainers; [ nckx ];
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};
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}
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@ -8418,6 +8418,8 @@ let
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firejail = callPackage ../os-specific/linux/firejail {};
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freefall = callPackage ../os-specific/linux/freefall { };
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fuse = callPackage ../os-specific/linux/fuse { };
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fxload = callPackage ../os-specific/linux/fxload { };
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