| 1 | /* $OpenBSD: swap.h,v 1.7 2013/09/30 12:02:30 millert 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 | #ifndef _SYS_SWAP_H_ |
| 32 | #define _SYS_SWAP_H_ |
| 33 | |
| 34 | #include <sys/syslimits.h> |
| 35 | |
| 36 | /* These structures are used to return swap information for userland */ |
| 37 | struct swapent { |
| 38 | dev_t se_dev; /* device id */ |
| 39 | int se_flags; /* flags */ |
| 40 | int se_nblks; /* total blocks */ |
| 41 | int se_inuse; /* blocks in use */ |
| 42 | int se_priority; /* priority of this device */ |
| 43 | char se_path[PATH_MAX]; /* path name */ |
| 44 | }; |
| 45 | |
| 46 | #ifdef _KERNEL |
| 47 | #define NETDEV (dev_t)(-2) /* network device (for nfs swap) */ |
| 48 | #endif /* _KERNEL */ |
| 49 | |
| 50 | #define SWAP_ON 1 /* begin swapping on device */ |
| 51 | #define SWAP_OFF 2 /* (stop swapping on device) */ |
| 52 | #define SWAP_NSWAP 3 /* how many swap devices ? */ |
| 53 | #define SWAP_STATS 4 /* get device info */ |
| 54 | #define SWAP_CTL 5 /* change priority on device */ |
| 55 | #define SWAP_DUMPDEV 7 /* use this device as dump device */ |
| 56 | |
| 57 | #define SWF_INUSE 0x00000001 /* in use: we have swapped here */ |
| 58 | #define SWF_ENABLE 0x00000002 /* enabled: we can swap here */ |
| 59 | #define SWF_BUSY 0x00000004 /* busy: I/O happening here */ |
| 60 | #define SWF_FAKE 0x00000008 /* fake: still being built */ |
| 61 | |
| 62 | #endif /* _SYS_SWAP_H_ */ |