buf.h revision 1.1 
1/*	$NetBSD: buf.h,v 1.1 2001/10/26 06:20:21 lukem Exp $	*/
2
3/*
4 * Copyright 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
44struct 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
56void		bcleanup(void);
57int		bread(int, struct fs *, daddr_t, int, struct buf **);
58void		brelse(struct buf *);
59int		bwrite(struct buf *);
60struct 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 */
66