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Annotation of sys/sys/swap.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: swap.h,v 1.4 2001/06/27 04:51:48 art 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: /* NOTE: This is the current swap.h from NetBSD.  Since we are "upgrading"
        !            32:  * to the new vm_swap code now, we will not keep compatibility with the
        !            33:  * old vm_swap code that was in NetBSD.  This means that we do not have
        !            34:  * an oswapent structure, but instead use a "new" swapent structure, with
        !            35:  * no overlay.
        !            36:  *
        !            37:  * --Toby.
        !            38:  */
        !            39:
        !            40: #ifndef _SYS_SWAP_H_
        !            41: #define _SYS_SWAP_H_
        !            42:
        !            43: #include <sys/syslimits.h>
        !            44:
        !            45: /* These structures are used to return swap information for userland */
        !            46: struct swapent {
        !            47:        dev_t   se_dev;                 /* device id */
        !            48:        int     se_flags;               /* flags */
        !            49:        int     se_nblks;               /* total blocks */
        !            50:        int     se_inuse;               /* blocks in use */
        !            51:        int     se_priority;            /* priority of this device */
        !            52:        char    se_path[MAXPATHLEN];    /* path name */
        !            53: };
        !            54:
        !            55: #define SWAP_ON                1               /* begin swapping on device */
        !            56: #define SWAP_OFF       2               /* (stop swapping on device) */
        !            57: #define SWAP_NSWAP     3               /* how many swap devices ? */
        !            58: #define SWAP_STATS     4               /* get device info */
        !            59: #define SWAP_CTL       5               /* change priority on device */
        !            60: #define SWAP_DUMPDEV   7               /* use this device as dump device */
        !            61:
        !            62: #define SWF_INUSE      0x00000001      /* in use: we have swapped here */
        !            63: #define SWF_ENABLE     0x00000002      /* enabled: we can swap here */
        !            64: #define SWF_BUSY       0x00000004      /* busy: I/O happening here */
        !            65: #define SWF_FAKE       0x00000008      /* fake: still being built */
        !            66:
        !            67: #endif /* _SYS_SWAP_H_ */