113 lines
2.6 KiB
Nix
113 lines
2.6 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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let
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inherit (lib)
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mkEnableOption
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mkIf
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mkOption
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types
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;
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cfg = config.hardware.sata.timeout;
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buildRule =
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d:
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lib.concatStringsSep ", " [
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''ACTION=="add"''
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''SUBSYSTEM=="block"''
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''ENV{ID_${lib.toUpper d.idBy}}=="${d.name}"''
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''TAG+="systemd"''
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''ENV{SYSTEMD_WANTS}="${unitName d}"''
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];
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devicePath = device: "/dev/disk/by-${device.idBy}/${device.name}";
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unitName = device: "sata-timeout-${lib.strings.sanitizeDerivationName device.name}";
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startScript = pkgs.writeShellScript "sata-timeout.sh" ''
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set -eEuo pipefail
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device="$1"
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${pkgs.smartmontools}/bin/smartctl \
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-l scterc,${toString cfg.deciSeconds},${toString cfg.deciSeconds} \
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--quietmode errorsonly \
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"$device"
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'';
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in
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{
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meta.maintainers = with lib.maintainers; [ peterhoeg ];
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options.hardware.sata.timeout = {
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enable = mkEnableOption "SATA drive timeouts";
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deciSeconds = mkOption {
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example = 70;
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type = types.int;
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description = ''
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Set SCT Error Recovery Control timeout in deciseconds for use in RAID configurations.
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Values are as follows:
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0 = disable SCT ERT
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70 = default in consumer drives (7 seconds)
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Maximum is disk dependant but probably 60 seconds.
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'';
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};
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drives = mkOption {
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description = "List of drives for which to configure the timeout.";
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type = types.listOf (
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types.submodule {
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options = {
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name = mkOption {
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description = "Drive name without the full path.";
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type = types.str;
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};
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idBy = mkOption {
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description = "The method to identify the drive.";
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type = types.enum [
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"path"
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"wwn"
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];
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default = "path";
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};
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};
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}
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);
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};
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};
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config = mkIf cfg.enable {
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services.udev.extraRules = lib.concatMapStringsSep "\n" buildRule cfg.drives;
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systemd.services = lib.listToAttrs (
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map (
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e:
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lib.nameValuePair (unitName e) {
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description = "SATA timeout for ${e.name}";
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wantedBy = [ "sata-timeout.target" ];
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serviceConfig = {
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Type = "oneshot";
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ExecStart = "${startScript} '${devicePath e}'";
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PrivateTmp = true;
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PrivateNetwork = true;
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ProtectHome = "tmpfs";
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ProtectSystem = "strict";
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};
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}
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) cfg.drives
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);
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systemd.targets.sata-timeout = {
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description = "SATA timeout";
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wantedBy = [ "multi-user.target" ];
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};
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};
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}
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