Added kernel private node_monitor.h header.

Moved definition of "struct io_context" from fd.h to vfs.h.
Introduced new fs/ directory; some cleanups to come.
Added node monitor syscalls.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2479 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/fs/node_monitor.h

@@ -0,0 +1,25 @@
+#ifndef _KERNEL_NODE_MONITOR_H
+#define _KERNEL_NODE_MONITOR_H
+/*
+** Copyright 2003, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+
+#include <OS.h>
+
+
+struct io_context;
+
+// private kernel API
+extern status_t remove_node_monitors(struct io_context *context);
+extern status_t node_monitor_init(void);
+
+// user-space exported calls
+extern status_t user_stop_notifying(port_id port, uint32 token);
+extern status_t user_start_watching(dev_t device, ino_t node, uint32 flags,
+					port_id port, uint32 token);
+extern status_t user_stop_watching(dev_t device, ino_t node, uint32 flags,
+					port_id port, uint32 token);
+
+#endif	/* _KRENEL_NODE_MONITOR_H */