This is my initial working version.

There is a bug in boot in this version: subhurd sometimes cannot boot.

1 files changed, 90 insertions, 0 deletions

diff --git a/unionfs/unionfs.h b/unionfs/unionfs.h
new file mode 100644
index 00000000..8f5a0873
--- /dev/null
+++ b/unionfs/unionfs.h
@@ -0,0 +1,90 @@
+/* Hurd unionfs
+   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+   Written by Moritz Schulte <moritz@duesseldorf.ccc.de>.
+
+   This program 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 of the
+   License, or * (at your option) any later version.
+ 
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+   USA.  */
+
+/* This unionfs knows about two different kind of nodes: `light nodes'
+   (in short: lnode) and `nodes' (or: netfs nodes) as used by
+   libnetfs.  They have different tasks and therefore this division
+   makes sense.
+
+   lnodes form the filesystem tree as seen by the user; most
+   importantly they contain the `name' of the node.
+
+   lnodes are small and cheap, they are not cached (nodes are).
+
+   lnodes are usually created when a node is looked up and destroyed
+   when that node gets destroyed; but there are also reasons for
+   lnodes _not_ being destroyed.
+
+   The distinction makes it possible to keep certain information for
+   the unionfs in these lnodes while netfs nodes don't have to stay in
+   memory.  
+
+   lnodes have to be looked up first before a node is looked up.  Each
+   lnode contains a pointer to the netfs node, which might be NULL in
+   case the netfs node is not in memory anymore.  */
+
+/* General information and properties for the unionfs.  */
+
+#ifndef INCLUDED_UNIONFS_H
+#define INCLUDED_UNIONFS_H
+
+#include <hurd/netfs.h>
+#include <sys/types.h>
+
+#include "node.h"
+#include "lib.h"
+
+/* Default maximum number of nodes in the cache.  */
+#define NCACHE_SIZE 256
+
+/* The inode for the root node.  */
+#define UNIONFS_ROOT_INODE 1
+
+/* Flags for UNIONFS_FLAGS.  */
+
+/* Print debugging messages to stderr.  */
+#define FLAG_UNIONFS_MODE_DEBUG 0x00000001
+/* Use copy-on-write.  */
+#define FLAG_UNIONFS_MODE_COW   0x00000002
+
+/* Flags describing certain properties of the unionfs.  */
+extern int unionfs_flags;
+
+/* The filesystem id (the pid).  */
+extern pid_t fsid;
+
+/* Mapped time, used for updating node information.  */
+extern volatile struct mapped_time_value *maptime;
+
+/* A port to the underlying node.  */
+extern mach_port_t underlying_node;
+
+/* stat information for the underlying node.  */
+extern struct stat underlying_node_stat;
+
+/* Send a debugging message, if unionfs is in debugging mode.  */
+#define debug_msg(fmt, args...)                          \
+        do                                               \
+          {                                              \
+            if (unionfs_flags & FLAG_UNIONFS_MODE_DEBUG) \
+              debug_msg_send (fmt , ## args);            \
+          }                                              \
+        while (0)
+
+#endif