global(fs): add f2fs and zfs

global/fs/zfs.nix

@@ -0,0 +1,41 @@
+{ pkgs
+, lib
+, config
+, ... }: with lib; let
+  cfg = config.global.fs;
+in {
+  options.global.fs.zfs = {
+    persist = mkOption {
+      type = with types; str;
+      default = cfg.store;
+      description = ''
+        pool for persist dataset
+        defaults to nix store dataset
+      '';
+    };
+  };
+
+  config = mkIf (cfg.type == "zfs") {
+    fileSystems = {
+      "/nix" =
+        { device = "${cfg.store}/nix";
+          fsType = "zfs";
+        };
+      "/nix/persist" =
+        { device = "${cfg.zfs.persist}/persist";
+          fsType = "zfs";
+          neededForBoot = true;
+        };
+    } // (mapAttrs' (name: opts: nameValuePair
+    "/nix/persist/home/${name}" {
+      device = "${cfg.zfs.persist}/home/${name}";
+      fsType = "zfs";
+      neededForBoot = true;
+    }) (filterAttrs (n: _: n != "root") config.users.profiles));
+
+    services.zfs.trim.enable = true;
+    services.zfs.autoSnapshot.enable = true;
+    services.zfs.autoScrub.enable = true;
+    boot.zfs.devNodes = mkDefault "/dev/disk/by-partuuid";
+  };
+}