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