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33 lines
642 B
Nix
33 lines
642 B
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let cfg = config.powerManagement.scsiLinkPolicy; in
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{
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###### interface
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options = {
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powerManagement.scsiLinkPolicy = mkOption {
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default = null;
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type = types.nullOr (types.enum [ "min_power" "max_performance" "medium_power" ]);
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description = ''
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SCSI link power management policy. The kernel default is
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"max_performance".
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'';
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};
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};
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###### implementation
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config = mkIf (cfg != null) {
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services.udev.extraRules = ''
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SUBSYSTEM=="scsi_host", ACTION=="add", KERNEL=="host*", ATTR{link_power_management_policy}="${cfg}"
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'';
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};
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}
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