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Annotation of sys/sys/swap.h, Revision 1.1.1.1

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_ */