75 lines
3.0 KiB
C
75 lines
3.0 KiB
C
/* $NetBSD: swap.h,v 1.5 2000/11/17 11:32:55 mrg Exp $ */
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/*
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* Copyright (c) 1995, 1996, 1998 Matthew R. Green
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_SWAP_H_
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#define _SYS_SWAP_H_
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#include <sys/syslimits.h>
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/* These structures are used to return swap information for userland */
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/*
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* NetBSD 1.3 swapctl(SWAP_STATS, ...) swapent structure; now used as an
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* overlay for both the new swapent structure, and the hidden swapdev
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* structure (see sys/uvm/uvm_swap.c).
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*/
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struct oswapent {
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dev_t ose_dev; /* device id */
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int ose_flags; /* flags */
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int ose_nblks; /* total blocks */
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int ose_inuse; /* blocks in use */
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int ose_priority; /* priority of this device */
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};
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struct swapent {
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struct oswapent se_ose;
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#define se_dev se_ose.ose_dev
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#define se_flags se_ose.ose_flags
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#define se_nblks se_ose.ose_nblks
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#define se_inuse se_ose.ose_inuse
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#define se_priority se_ose.ose_priority
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char se_path[PATH_MAX+1]; /* path name */
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};
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#define SWAP_ON 1 /* begin swapping on device */
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#define SWAP_OFF 2 /* stop swapping on device */
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#define SWAP_NSWAP 3 /* how many swap devices ? */
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#define SWAP_OSTATS 4 /* old SWAP_STATS, no se_path */
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#define SWAP_CTL 5 /* change priority on device */
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#define SWAP_STATS 6 /* get device info */
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#define SWAP_DUMPDEV 7 /* use this device as dump device */
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#define SWAP_GETDUMPDEV 8 /* use this device as dump device */
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#define SWF_INUSE 0x00000001 /* in use: we have swapped here */
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#define SWF_ENABLE 0x00000002 /* enabled: we can swap here */
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#define SWF_BUSY 0x00000004 /* busy: I/O happening here */
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#define SWF_FAKE 0x00000008 /* fake: still being built */
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#endif /* _SYS_SWAP_H_ */
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