smart

NixOS · Mar 18, 2019 · b81efc8 · b81efc8
1 parent da1a2b1
commit b81efc8
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diff --git a/nixos/modules/hardware/smart.nix b/nixos/modules/hardware/smart.nix
@@ -0,0 +1,79 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.hardware.smart;
+
+  smartDeviceOpts = { name, ... }: {
+    options = {
+
+      device = mkOption {
+        example = "/dev/sda";
+        type = types.str;
+        description = "Location of the device.";
+      };
+
+      timeout = mkOption {
+        default = -1;
+        example = "70";
+        type = types.int;
+        description = ''
+          Set SCT Error Recovery Control timeout in deciseconds for use in RAID configurations.
+          Values are as follows:
+            -1 = do not touch, leave at default
+             0 = disable SCT ERT
+            70 = default in consumer drives (7 seconds)
+          Maximum is disk dependant but probably 60 seconds.
+        '';
+      };
+
+      options = mkOption {
+        default = "";
+        example = "-J 30";
+        type = types.separatedString " ";
+        description = "Options for smartctl";
+      };
+    };
+  };
+
+  deviceTimeout = d:
+    lib.optionalString (d.timeout > -1) ''
+      ${smartctl} ${d.device} "-l scterc,${d.timeout},${d.timeout} --silent errorsonly"
+    '';
+
+  smartctl = device: options: ''
+    ${pkgs.smartmontools}/bin/smartctl ${options} ${device}
+  '';
+
+in {
+  options.hardware.smart = {
+    enable = mkEnableOption "SMART for disks";
+
+    devices = mkOption {
+      default = [];
+      example = [
+        { device = "/dev/sda"; timeout = 0; }
+        { device = "/dev/sdb"; options = "-J 30"; } ];
+      type = with types; listOf (submodule smartDeviceOpts);
+      description = "List of devices for which to configure SMART settings";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.smart = {
+      description = "Configure SMART for storage devices";
+      before = [ "smartd.service" ];
+      wantedBy = [ "multi-user.target" ];
+      script = ''
+        ${concatMapStringsSep "\n" deviceTimeout cfg.devices}
+        # ${concatMapStringsSep "\n" deviceTimeout cfg.devices}
+      '';
+      serviceConfig = {
+        Type = "oneshot";
+        PrivateTmp = true;
+        PrivateNetwork = true;
+      };
+    };
+  };
+}
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
@@ -51,6 +51,7 @@
   ./hardware/opengl.nix
   ./hardware/pcmcia.nix
   ./hardware/raid/hpsa.nix
+  ./hardware/smart.nix
   ./hardware/steam-hardware.nix
   ./hardware/usb-wwan.nix
   ./hardware/onlykey.nix