adding kernel nfs daemon upstart job

svn path=/nixos/branches/modular-nixos/; revision=15219

system/options.nix

@@ -485,6 +485,8 @@ in
 
     (import ../upstart-jobs/synergy.nix)
 
+    (import ../upstart-jobs/nfs-kernel.nix)
+
     # nix
     (import ../upstart-jobs/nix.nix) # nix options and daemon
     (import ../system/nixos-installer.nix)

upstart-jobs/nfs-kernel.nix

@@ -0,0 +1,118 @@
+
+{pkgs, config, ...}:
+
+###### interface
+let
+  inherit (pkgs.lib) mkOption mkIf;
+
+  options = {
+    services = {
+      nfsKernel = {
+
+        enable = mkOption {
+          default = false;
+          description = "
+            wether to use the kernel nfs functionality to export filesystems.
+            You should be aware about existing security issues.
+            requires portmap!
+          ";
+        };
+
+        exports = mkOption {
+          default = "/etc/exports";
+          description = "
+            the file listing the directories to be exported.
+            install nfsUtils and run man exports to learn about its format.
+            The exports setting can either be a file path or the file contents.
+          ";
+        };
+
+        hostName = mkOption {
+          default = null;
+          description = "
+             specify a particular hostname (or address) that NFS requests will be accepted on.
+             Default: all.
+             See man rpc.nfsd (-H option)
+          ";
+        };
+        nproc = mkOption {
+          default = 8;
+          description = "
+            specify  the  number  of NFS server threads. (-> man rpc.nfsd). Defaults to recommended value 8
+          ";
+        };
+      };
+    };
+  };
+
+###### implementation
+
+  inherit (pkgs) writeText openssh;
+
+  cfg = (config.services.nfsKernel);
+
+  modprobe = config.system.sbin.modprobe;
+
+  exports = if builtins.pathExists cfg.exports
+    then cfg.export else pkgs.writeText "exports" cfg.exports;
+
+in
+
+
+mkIf config.services.sshd.enable {
+  require = [
+    options
+  ];
+
+  services = {
+    extraJobs = [
+    {
+      name = "nfs-kernel-exports";
+
+      job = ''
+        description "export filesystems using kernel nfs"
+
+        start on network-interfaces/started
+        stop on network-interfaces/stop
+
+        PATH=${pkgs.nfsUtils}/sbin
+
+        start script
+          ${modprobe}/sbin/modprobe nfsd || true
+          exportfs -a
+        end script
+
+        respawn sleep 1000000
+
+        start script
+          exportfs -au
+        end script
+      '';
+    }
+    {
+      name = "nfs-kernel-rpc-nfsd";
+
+      job = ''
+        description "export filesystems using kernel nfs"
+
+        start on nfs-kernel-exports/started
+        stop on nfs-kernel-exports/stop
+
+        respawn ${pkgs.nfsUtils}/sbin/rpc.nfsd ${if cfg.hostName != null then "-H ${cfg.hostName}" else ""} ${builtins.toString cfg.nproc}
+      '';
+    }
+    {
+      name = "nfs-kernel-mountd";
+
+      job = ''
+        description "export filesystems using kernel nfs"
+
+        start on nfs-kernel-rpc-nfsd/started
+        stop on nfs-kernel-exports/stop
+
+        respawn ${pkgs.nfsUtils}/sbin/rpc.mountd -F -f ${exports}
+      '';
+    }
+    ];
+  };
+}