/*      $NetBSD: swap.h,v 1.10 2026/03/23 23:44:12 yamt Exp $   */

/*
 * Copyright (c) 1995, 1996, 1998, 2009 Matthew R. Green
 * 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.
 *
 * 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>

/* This structure is 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+1];    /* path name */
        char    se_reserved1[7];        /* padding for 8-byte alignment */
        int     se_npgbad;              /* bad pages */
        int     se_reserved2[31];       /* reserved for future use */
};

__CTASSERT(sizeof(struct swapent) == 1184); /* user abi */

#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_STATS13    4               /* old SWAP_STATS, no se_path */
#define SWAP_CTL        5               /* change priority on device */
#define SWAP_STATS50    6               /* old SWAP_STATS, 32 bit dev_t */
#define SWAP_DUMPDEV    7               /* use this device as dump device */
#define SWAP_GETDUMPDEV 8               /* use this device as dump device */
#define SWAP_DUMPOFF    9               /* stop using the dump device */
#define SWAP_STATS110   10              /* get device info */
#define SWAP_STATS      11              /* get device info */

#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_ */