92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/*-
|
|
* Copyright (c) 1990 University of Utah.
|
|
* Copyright (c) 1991 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department.
|
|
*
|
|
* 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. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
|
|
*
|
|
* from: @(#)swap_pager.h 7.1 (Berkeley) 12/5/90
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _VM_SWAP_PAGER_H_
|
|
#define _VM_SWAP_PAGER_H_ 1
|
|
|
|
typedef int32_t swblk_t; /*
|
|
* swap offset. This is the type used to
|
|
* address the "virtual swap device" and
|
|
* therefore the maximum swap space is
|
|
* 2^32 pages.
|
|
*/
|
|
|
|
struct buf;
|
|
struct swdevt;
|
|
typedef void sw_strategy_t(struct buf *, struct swdevt *);
|
|
typedef void sw_close_t(struct thread *, struct swdevt *);
|
|
|
|
/*
|
|
* Swap device table
|
|
*/
|
|
struct swdevt {
|
|
int sw_flags;
|
|
int sw_nblks;
|
|
int sw_used;
|
|
dev_t sw_dev;
|
|
struct vnode *sw_vp;
|
|
void *sw_id;
|
|
swblk_t sw_first;
|
|
swblk_t sw_end;
|
|
struct blist *sw_blist;
|
|
TAILQ_ENTRY(swdevt) sw_list;
|
|
sw_strategy_t *sw_strategy;
|
|
sw_close_t *sw_close;
|
|
};
|
|
|
|
#define SW_UNMAPPED 0x01
|
|
#define SW_CLOSING 0x04
|
|
|
|
#ifdef _KERNEL
|
|
|
|
extern int swap_pager_full;
|
|
extern int swap_pager_avail;
|
|
|
|
struct xswdev;
|
|
int swap_dev_info(int name, struct xswdev *xs, char *devname, size_t len);
|
|
void swap_pager_copy(vm_object_t, vm_object_t, vm_pindex_t, int);
|
|
vm_pindex_t swap_pager_find_least(vm_object_t object, vm_pindex_t pindex);
|
|
void swap_pager_freespace(vm_object_t, vm_pindex_t, vm_size_t);
|
|
void swap_pager_swap_init(void);
|
|
int swap_pager_nswapdev(void);
|
|
int swap_pager_reserve(vm_object_t, vm_pindex_t, vm_size_t);
|
|
void swap_pager_status(int *total, int *used);
|
|
void swapoff_all(void);
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _VM_SWAP_PAGER_H_ */
|