1 files changed, 45 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/services/misc/fstrim.nix b/nixpkgs/nixos/modules/services/misc/fstrim.nix
new file mode 100644
index 000000000000..55fb24e29272
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/misc/fstrim.nix
@@ -0,0 +1,45 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.fstrim;
+
+in {
+
+  options = {
+
+    services.fstrim = {
+      enable = mkEnableOption (lib.mdDoc "periodic SSD TRIM of mounted partitions in background");
+
+      interval = mkOption {
+        type = types.str;
+        default = "weekly";
+        description = lib.mdDoc ''
+          How often we run fstrim. For most desktop and server systems
+          a sufficient trimming frequency is once a week.
+
+          The format is described in
+          {manpage}`systemd.time(7)`.
+        '';
+      };
+    };
+
+  };
+
+  config = mkIf cfg.enable {
+
+    systemd.packages = [ pkgs.util-linux ];
+
+    systemd.timers.fstrim = {
+      timerConfig = {
+        OnCalendar = [ "" cfg.interval ];
+      };
+      wantedBy = [ "timers.target" ];
+    };
+
+  };
+
+  meta.maintainers = with maintainers; [ ];
+}