1/*
2 * Copyright (c) 1999, 2000-2002 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifndef __VN_SHADOW_H__
30#define __VN_SHADOW_H__
31
32#include <sys/appleapiopts.h>
33
34#ifdef __APPLE_API_PRIVATE
35
36typedef struct shadow_map shadow_map_t;
37
38boolean_t
39shadow_map_read(shadow_map_t * map, u_long block_offset, u_long block_count,
40		u_long * incr_block_offset, u_long * incr_block_count);
41boolean_t
42shadow_map_write(shadow_map_t * map, u_long block_offset, u_long block_count,
43		 u_long * incr_block_offset, u_long * incr_block_count);
44boolean_t
45shadow_map_is_written(shadow_map_t * map, u_long block_offset);
46
47u_long
48shadow_map_shadow_size(shadow_map_t * map);
49
50shadow_map_t *
51shadow_map_create(off_t file_size, off_t shadow_size,
52		  unsigned long band_size, unsigned long block_size);
53void
54shadow_map_free(shadow_map_t * map);
55
56#endif /* __APPLE_API_PRIVATE */
57#endif /* __VN_SHADOW_H__ */
58
59
60
61