sys/fs/v7fs/v7fs_datablock.h

   1 /*      $NetBSD: v7fs_datablock.h,v 1.2 2011/07/16 12:35:32 uch Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by UCHIYAMA Yasushi.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _V7FS_DATABLOCK_H_
  33 #define _V7FS_DATABLOCK_H_
  34
  35 __BEGIN_DECLS
  36 bool datablock_number_sanity(const struct v7fs_self *, v7fs_daddr_t);
  37 int v7fs_datablock_allocate(struct v7fs_self *, v7fs_daddr_t *);
  38 int v7fs_datablock_foreach(struct v7fs_self *, struct v7fs_inode *,
  39     int (*)(struct v7fs_self *, void *, v7fs_daddr_t, size_t), void *);
  40 v7fs_daddr_t v7fs_datablock_last(struct v7fs_self *, struct v7fs_inode *,
  41     v7fs_off_t);
  42 int v7fs_datablock_expand(struct v7fs_self *, struct v7fs_inode *, size_t);
  43 int v7fs_datablock_contract(struct v7fs_self *, struct v7fs_inode *, size_t);
  44 int v7fs_datablock_size_change(struct v7fs_self *, size_t, struct v7fs_inode *);
  45
  46 struct v7fs_daddr_map {
  47         int level; /* direct, index1, index2, index3 */
  48         v7fs_daddr_t index[3];
  49 };
  50 int v7fs_datablock_addr(size_t, struct v7fs_daddr_map *);
  51 __END_DECLS
  52 #endif /*!_V7FS_INODE_H_ */