FreeBSD/Linux Kernel Cross Reference
sys/sys/swap.h
1 /* $NetBSD: swap.h,v 1.6 2006/08/22 14:07:07 martin Exp $ */
2
3 /*
4 * Copyright (c) 1995, 1996, 1998 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #ifndef _SYS_SWAP_H_
31 #define _SYS_SWAP_H_
32
33 #include <sys/syslimits.h>
34
35 /* These structures are used to return swap information for userland */
36
37 /*
38 * NetBSD 1.3 swapctl(SWAP_STATS, ...) swapent structure; now used as an
39 * overlay for both the new swapent structure, and the hidden swapdev
40 * structure (see sys/uvm/uvm_swap.c).
41 */
42 struct oswapent {
43 dev_t ose_dev; /* device id */
44 int ose_flags; /* flags */
45 int ose_nblks; /* total blocks */
46 int ose_inuse; /* blocks in use */
47 int ose_priority; /* priority of this device */
48 };
49
50 struct swapent {
51 struct oswapent se_ose;
52 #define se_dev se_ose.ose_dev
53 #define se_flags se_ose.ose_flags
54 #define se_nblks se_ose.ose_nblks
55 #define se_inuse se_ose.ose_inuse
56 #define se_priority se_ose.ose_priority
57 char se_path[PATH_MAX+1]; /* path name */
58 };
59
60 #define SWAP_ON 1 /* begin swapping on device */
61 #define SWAP_OFF 2 /* stop swapping on device */
62 #define SWAP_NSWAP 3 /* how many swap devices ? */
63 #define SWAP_OSTATS 4 /* old SWAP_STATS, no se_path */
64 #define SWAP_CTL 5 /* change priority on device */
65 #define SWAP_STATS 6 /* get device info */
66 #define SWAP_DUMPDEV 7 /* use this device as dump device */
67 #define SWAP_GETDUMPDEV 8 /* use this device as dump device */
68 #define SWAP_DUMPOFF 9 /* stop using the dump device */
69
70 #define SWF_INUSE 0x00000001 /* in use: we have swapped here */
71 #define SWF_ENABLE 0x00000002 /* enabled: we can swap here */
72 #define SWF_BUSY 0x00000004 /* busy: I/O happening here */
73 #define SWF_FAKE 0x00000008 /* fake: still being built */
74
75 #endif /* _SYS_SWAP_H_ */
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