bsd/dev/vn/shadow.h

   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
  36 typedef struct shadow_map shadow_map_t;
  37
  38 boolean_t
  39 shadow_map_read(shadow_map_t * map, uint32_t block_offset, uint32_t block_count,
  40                 uint32_t * incr_block_offset, uint32_t * incr_block_count);
  41 boolean_t
  42 shadow_map_write(shadow_map_t * map, uint32_t block_offset, uint32_t block_count,
  43                  uint32_t * incr_block_offset, uint32_t * incr_block_count);
  44 boolean_t
  45 shadow_map_is_written(shadow_map_t * map, uint32_t block_offset);
  46
  47 uint32_t
  48 shadow_map_shadow_size(shadow_map_t * map);
  49
  50 shadow_map_t *
  51 shadow_map_create(off_t file_size, off_t shadow_size,
  52                   uint32_t band_size, uint32_t block_size);
  53 void
  54 shadow_map_free(shadow_map_t * map);
  55
  56 #endif /* __APPLE_API_PRIVATE */
  57 #endif /* __VN_SHADOW_H__ */
  58
  59
  60