1 /* $NetBSD: swap.h,v 1.5 2000/11/17 11:32:55 mrg 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 69 #define SWF_INUSE 0x00000001 /* in use: we have swapped here */ 70 #define SWF_ENABLE 0x00000002 /* enabled: we can swap here */ 71 #define SWF_BUSY 0x00000004 /* busy: I/O happening here */ 72 #define SWF_FAKE 0x00000008 /* fake: still being built */ 73 74 #endif /* _SYS_SWAP_H_ */ 75