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_ */ 63