Commit e6909f5a authored by Christian Kögler's avatar Christian Kögler
Browse files

nixos/systemd-initrd: support omitting kernel parameter root

parent 8110df5a

nixos/modules/system/boot/systemd/initrd.nix

+14 −11
Original line number Diff line number Diff line
@@ -260,10 +260,12 @@ in 
    };



    root = lib.mkOption {

      type = lib.types.enum [

      type = lib.types.nullOr (

        lib.types.enum [

          "fstab"

          "gpt-auto"

      ];

        ]

      );

      default = "fstab";

      example = "gpt-auto";

      description = ''
@@ -272,6 +274,7 @@ in 
        allow specifying the root file system itself this

        way. Instead, the `fstab` value is used in order to interpret

        the root file system specified with the `fileSystems` option.

        If root shall be omitted, set this option to `null`.

      '';

    };
@@ -469,9 +472,9 @@ in 
    ]

    ++ lib.optional cfg.package.withEfi "efivarfs";



    boot.kernelParams = [

      "root=${config.boot.initrd.systemd.root}"

    ]

    boot.kernelParams =

      lib.optional (config.boot.initrd.systemd.root != null) "root=${config.boot.initrd.systemd.root}"



      ++ lib.optional (config.boot.resumeDevice != "") "resume=${config.boot.resumeDevice}"

      # `systemd` mounts root in initrd as read-only unless "rw" is on the kernel command line.

      # For NixOS activation to succeed, we need to have root writable in initrd.