1 /* $NetBSD: swap.h,v 1.8 2009/01/14 02:20:45 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1998, 2009 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _SYS_SWAP_H_ 29 #define _SYS_SWAP_H_ 30 31 #include <sys/syslimits.h> 32 33 /* Thise structure is used to return swap information for userland */ 34 35 struct swapent { 36 dev_t se_dev; /* device id */ 37 int se_flags; /* flags */ 38 int se_nblks; /* total blocks */ 39 int se_inuse; /* blocks in use */ 40 int se_priority; /* priority of this device */ 41 char se_path[PATH_MAX+1]; /* path name */ 42 }; 43 44 #define SWAP_ON 1 /* begin swapping on device */ 45 #define SWAP_OFF 2 /* stop swapping on device */ 46 #define SWAP_NSWAP 3 /* how many swap devices ? */ 47 #define SWAP_STATS13 4 /* old SWAP_STATS, no se_path */ 48 #define SWAP_CTL 5 /* change priority on device */ 49 #define SWAP_STATS50 6 /* old SWAP_STATS, 32 bit dev_t */ 50 #define SWAP_DUMPDEV 7 /* use this device as dump device */ 51 #define SWAP_GETDUMPDEV 8 /* use this device as dump device */ 52 #define SWAP_DUMPOFF 9 /* stop using the dump device */ 53 #define SWAP_STATS 10 /* get device info */ 54 55 #define SWF_INUSE 0x00000001 /* in use: we have swapped here */ 56 #define SWF_ENABLE 0x00000002 /* enabled: we can swap here */ 57 #define SWF_BUSY 0x00000004 /* busy: I/O happening here */ 58 #define SWF_FAKE 0x00000008 /* fake: still being built */ 59 60 #endif /* _SYS_SWAP_H_ */ 61