From 8f48e6fa4324fc242af66ab0d49e467f98656f15 Mon Sep 17 00:00:00 2001
From: Marcus Brinkmann <marcus@gnu.org>
Date: Tue, 3 Dec 2002 20:52:59 +0000
Subject: Initial check-in.

---
 fatfs/virt-inode.h | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 fatfs/virt-inode.h

(limited to 'fatfs/virt-inode.h')

diff --git a/fatfs/virt-inode.h b/fatfs/virt-inode.h
new file mode 100644
index 00000000..5b889d23
--- /dev/null
+++ b/fatfs/virt-inode.h
@@ -0,0 +1,69 @@
+/* virt-inode.h - Public interface for the virtual inode management routines.
+   Copyright (C) 2002 Free Software Foundation, Inc.
+   Written by Marcus Brinkmann.
+
+   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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#ifndef VIRT_INODE_H
+#define VIRT_INODE_H
+
+#include <errno.h>
+#include <dirent.h>
+
+/* Define struct vi_key to match your needs.  It is passed by copy,
+   so don't make it too huge.  Equality is tested with memcpy, because
+   C == operator doesn't work on structs.  */
+
+struct vi_key
+{
+  ino_t dir_inode;
+  int dir_offset;
+};
+
+typedef struct vi_key vi_key_t;
+
+extern vi_key_t vi_zero_key;
+
+typedef struct v_inode *inode_t;
+
+/* Allocate a new inode number INODE for KEY and return it as well as
+   the virtual inode V_INODE. Return 0 on success, otherwise an error
+   value (ENOSPC).  */
+error_t vi_new(vi_key_t key, ino_t *inode, inode_t *v_inode);
+
+/* Get the key for virtual inode V_INODE. */
+vi_key_t vi_key(inode_t v_inode);
+
+/* Get the inode V_INODE belonging to inode number INODE.
+   Returns 0 if this inode number is free.  */
+inode_t vi_lookup(ino_t inode);
+
+/* Get the inode number and virtual inode belonging to key KEY.
+   Returns 0 on success and EINVAL if no inode is found for KEY and
+   CREATE is false. Otherwise, if CREATE is true, allocate a new
+   inode.  */
+error_t vi_rlookup(vi_key_t key, ino_t *inode, inode_t *v_inode, int create);
+
+/* Change the key of virtual inode V_INODE to KEY and return the old
+   key. */
+vi_key_t vi_change(inode_t v_inode, vi_key_t key);
+
+/* Release virtual inode V_INODE, freeing the inode number.  Return
+   the key.  */
+vi_key_t vi_free(inode_t v_inode);
+
+#endif
-- 
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