usr.sbin/makefs/ffs/buf.h

   1 /*      $NetBSD: buf.h,v 1.1.1.1 2001/10/26 06:20:21 lukem Exp $        */
   2
   3 /*
   4  * Copyright (c) 2001 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Luke Mewburn for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #ifndef _FFS_BUF_H
  39 #define _FFS_BUF_H
  40
  41 #include <sys/param.h>
  42 #include <sys/queue.h>
  43
  44 struct buf {
  45         void *          b_data;
  46         long            b_bufsize;
  47         long            b_bcount;
  48         daddr_t         b_blkno;
  49         daddr_t         b_lblkno;
  50         int             b_fd;
  51         struct fs *     b_fs;
  52
  53         TAILQ_ENTRY(buf)        b_tailq;
  54 };
  55
  56 void            bcleanup(void);
  57 int             bread(int, struct fs *, daddr_t, int, struct buf **);
  58 void            brelse(struct buf *);
  59 int             bwrite(struct buf *);
  60 struct buf *    getblk(int, struct fs *, daddr_t, int);
  61
  62 #define bdwrite(bp)     bwrite(bp)
  63 #define clrbuf(bp)      memset((bp)->b_data, 0, (u_int)(bp)->b_bcount)
  64
  65 #endif  /* _FFS_BUF_H */