xnu-344.tar.gz

[apple/xnu.git] / bsd / dev / vn / shadow.h

diff --git a/bsd/dev/vn/shadow.h b/bsd/dev/vn/shadow.h
new file mode 100644 (file)
index 0000000..074ba9e
--- /dev/null
+++ b/bsd/dev/vn/shadow.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 1999, 2000-2002 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef __VN_SHADOW_H__
+#define __VN_SHADOW_H__
+
+#include <sys/appleapiopts.h>
+
+#ifdef __APPLE_API_PRIVATE
+
+typedef struct shadow_map shadow_map_t;
+
+boolean_t
+shadow_map_read(shadow_map_t * map, u_long block_offset, u_long block_count,
+               u_long * incr_block_offset, u_long * incr_block_count);
+boolean_t
+shadow_map_write(shadow_map_t * map, u_long block_offset, u_long block_count,
+                u_long * incr_block_offset, u_long * incr_block_count);
+u_long
+shadow_map_shadow_size(shadow_map_t * map);
+
+shadow_map_t *
+shadow_map_create(off_t file_size, off_t shadow_size, 
+                 unsigned long band_size, unsigned long block_size);
+
+#endif /* __APPLE_API_PRIVATE */
+#endif /* __VN_SHADOW_H__ */
+
+
+