bsd/dev/vn/shadow.h

   1 /*
   2  * Copyright (c) 1999, 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 #ifndef __VN_SHADOW_H__
  27 #define __VN_SHADOW_H__
  28
  29 #include <sys/appleapiopts.h>
  30
  31 #ifdef __APPLE_API_PRIVATE
  32
  33 typedef struct shadow_map shadow_map_t;
  34
  35 boolean_t
  36 shadow_map_read(shadow_map_t * map, u_long block_offset, u_long block_count,
  37                 u_long * incr_block_offset, u_long * incr_block_count);
  38 boolean_t
  39 shadow_map_write(shadow_map_t * map, u_long block_offset, u_long block_count,
  40                  u_long * incr_block_offset, u_long * incr_block_count);
  41 u_long
  42 shadow_map_shadow_size(shadow_map_t * map);
  43
  44 shadow_map_t *
  45 shadow_map_create(off_t file_size, off_t shadow_size,
  46                   unsigned long band_size, unsigned long block_size);
  47
  48 #endif /* __APPLE_API_PRIVATE */
  49 #endif /* __VN_SHADOW_H__ */
  50
  51
  52