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/* $OpenBSD: swap.h,v 1.7 2013/09/30 12:02:30 millert Exp $ */
/* $NetBSD: swap.h,v 1.2 1998/09/13 14:46:24 christos Exp $ */
/*
* Copyright (c) 1995, 1996, 1998 Matthew R. Green, Tobias Weingartner
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYS_SWAP_H_
#define _SYS_SWAP_H_
#include <sys/syslimits.h>
/* These structures are used to return swap information for userland */
struct swapent {
dev_t se_dev; /* device id */
int se_flags; /* flags */
int se_nblks; /* total blocks */
int se_inuse; /* blocks in use */
int se_priority; /* priority of this device */
char se_path[PATH_MAX]; /* path name */
};
#ifdef _KERNEL
#define NETDEV (dev_t)(-2) /* network device (for nfs swap) */
#endif /* _KERNEL */
#define SWAP_ON 1 /* begin swapping on device */
#define SWAP_OFF 2 /* (stop swapping on device) */
#define SWAP_NSWAP 3 /* how many swap devices ? */
#define SWAP_STATS 4 /* get device info */
#define SWAP_CTL 5 /* change priority on device */
#define SWAP_DUMPDEV 7 /* use this device as dump device */
#define SWF_INUSE 0x00000001 /* in use: we have swapped here */
#define SWF_ENABLE 0x00000002 /* enabled: we can swap here */
#define SWF_BUSY 0x00000004 /* busy: I/O happening here */
#define SWF_FAKE 0x00000008 /* fake: still being built */
#endif /* _SYS_SWAP_H_ */
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