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diff --git a/hurd/fsys.defs b/hurd/fsys.defs
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+/* Definitions for the filesystem control interface
+   Copyright (C) 1992, 1993 Free Software Foundation
+
+This file is part of the GNU Hurd.
+
+The GNU Hurd is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU Hurd is distributed in the hope that it will be useful, 
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU Hurd; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+subsystem fsys 22000;
+
+#include <hurd/hurd_types.defs>
+
+#ifdef FSYS_IMPORTS
+FSYS_IMPORTS
+#endif
+
+/* Sent by filesystem on its bootstrap port upon startup.
+   REALNODE is the node this filesystem is the translator for,
+   with all permissions.  */
+routine fsys_startup (
+	bootstrap: mach_port_t;
+	control_port: fsys_t;
+	out realnode: file_t;
+	out dotdot_node: file_t);
+
+/* Filesystem should go away.  Bye.  */
+routine fsys_goaway (
+	fsys: fsys_t;
+	flags: int);
+
+/* Return a file to the root of the filesystem.
+   FLAGS are as for dir_pathtrans.
+   AUTH_REALNODE is an authenticated node for the user doing the
+   lookup to the real node underlying the port.  */
+routine fsys_getroot (
+	fsys: fsys_t;
+#ifdef	FSYS_GETROOT_UREPLY
+	ureplyport ureply: mig_reply_port_t;
+#endif
+	flags: int;
+	uids: idarray_t;
+	gids: idarray_t;
+	auth_realnode: mach_port_move_send_t;
+	out file: mach_port_move_send_t);
+
+/* Get a file given a file handle (see file_getfh).  */
+routine fsys_getfile (
+	fsys: fsys_t;
+	uids: idarray_t;
+	gids: idarray_t;
+	filehandle: data_t;
+	out file: file_t);