feat: drafted out zfs vdev, pool, and dataset implementations

modules/nixos-modules/storage/submodules/dataset.nix

@@ -1,3 +1,96 @@
-{name, ...}: {
-  # TODO: we need to figure out what options a dataset can have in zfs
+{lib, ...}: {name, ...}: {
+  options = {
+    type = lib.mkOption {
+      type = lib.types.enum ["zfs_fs" "zfs_volume"];
+      default = "zfs_fs";
+      description = "Type of ZFS dataset (filesystem or volume)";
+    };
+
+    # ZFS dataset options that match what's currently hardcoded in rootFsOptions
+    canmount = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["on" "off" "noauto"]);
+      default = null;
+      description = "Controls whether the file system can be mounted";
+    };
+
+    mountpoint = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Controls the mount point used for this file system";
+    };
+
+    xattr = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["on" "off" "sa" "dir"]);
+      default = null;
+      description = "Extended attribute storage method";
+    };
+
+    acltype = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["off" "nfsv4" "posixacl"]);
+      default = null;
+      description = "Access control list type";
+    };
+
+    relatime = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["on" "off"]);
+      default = null;
+      description = "Controls when access time is updated";
+    };
+
+    compression = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["on" "off" "lz4" "gzip" "zstd" "lzjb" "zle"]);
+      default = null;
+      description = "Compression algorithm to use";
+    };
+
+    encryption = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["on" "off" "aes-128-ccm" "aes-192-ccm" "aes-256-ccm" "aes-128-gcm" "aes-192-gcm" "aes-256-gcm"]);
+      default = null;
+      description = "Encryption algorithm to use";
+    };
+
+    keyformat = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["raw" "hex" "passphrase"]);
+      default = null;
+      description = "Format of the encryption key";
+    };
+
+    keylocation = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Location of the encryption key";
+    };
+
+    autoSnapshot = lib.mkOption {
+      type = lib.types.nullOr lib.types.bool;
+      default = null;
+      description = "Enable automatic snapshots for this dataset";
+    };
+
+    # Additional common ZFS options
+    recordsize = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Suggested block size for files in the file system";
+    };
+
+    sync = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["standard" "always" "disabled"]);
+      default = null;
+      description = "Synchronous write behavior";
+    };
+
+    atime = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["on" "off"]);
+      default = null;
+      description = "Controls whether access time is updated";
+    };
+
+    # Custom options for disko integration
+    postCreateHook = lib.mkOption {
+      type = lib.types.str;
+      default = "";
+      description = "Script to run after dataset creation";
+    };
+  };
 }