1 /* $OpenBSD: swap.h,v 1.4 2001/06/27 04:51:48 art Exp $ */
2 /* $NetBSD: swap.h,v 1.2 1998/09/13 14:46:24 christos Exp $ */
3
4 /*
5 * Copyright (c) 1995, 1996, 1998 Matthew R. Green, Tobias Weingartner
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /* NOTE: This is the current swap.h from NetBSD. Since we are "upgrading"
32 * to the new vm_swap code now, we will not keep compatibility with the
33 * old vm_swap code that was in NetBSD. This means that we do not have
34 * an oswapent structure, but instead use a "new" swapent structure, with
35 * no overlay.
36 *
37 * --Toby.
38 */
39
40 #ifndef _SYS_SWAP_H_
41 #define _SYS_SWAP_H_
42
43 #include <sys/syslimits.h>
44
45 /* These structures are used to return swap information for userland */
46 struct swapent {
47 dev_t se_dev; /* device id */
48 int se_flags; /* flags */
49 int se_nblks; /* total blocks */
50 int se_inuse; /* blocks in use */
51 int se_priority; /* priority of this device */
52 char se_path[MAXPATHLEN]; /* path name */
53 };
54
55 #define SWAP_ON 1 /* begin swapping on device */
56 #define SWAP_OFF 2 /* (stop swapping on device) */
57 #define SWAP_NSWAP 3 /* how many swap devices ? */
58 #define SWAP_STATS 4 /* get device info */
59 #define SWAP_CTL 5 /* change priority on device */
60 #define SWAP_DUMPDEV 7 /* use this device as dump device */
61
62 #define SWF_INUSE 0x00000001 /* in use: we have swapped here */
63 #define SWF_ENABLE 0x00000002 /* enabled: we can swap here */
64 #define SWF_BUSY 0x00000004 /* busy: I/O happening here */
65 #define SWF_FAKE 0x00000008 /* fake: still being built */
66
67 #endif /* _SYS_SWAP_H_ */