Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / dmap.h
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1/*-
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)dmap.h 8.2 (Berkeley) 1/4/94
34 * $FreeBSD: src/sys/sys/dmap.h,v 1.7 1999/12/29 04:24:40 peter Exp $
1de703da 35 * $DragonFly: src/sys/sys/dmap.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
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36 */
37
38#ifndef _SYS_DMAP_H_
39#define _SYS_DMAP_H_
40
41/*
42 * Definitions for the mapping of vitual swap space to the physical swap
43 * area - the disk map.
44 */
45#define NDMAP 38 /* size of the swap area map */
46
47struct dmap {
48 swblk_t dm_size; /* current size used by process */
49 swblk_t dm_alloc; /* amount of physical swap space allocated */
50 swblk_t dm_map[NDMAP]; /* first disk block number in each chunk */
51};
52#ifdef _KERNEL
53extern struct dmap zdmap;
54extern int dmmin, dmmax, dmtext;
55#endif
56
57/* The following structure is that ``returned'' from a call to vstodb(). */
58struct dblock {
59 swblk_t db_base; /* base of physical contig drum block */
60 swblk_t db_size; /* size of block */
61};
62#endif /* !_SYS_DMAP_H_ */