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b688fc87 WJ |
1 | /* |
2 | * Copyright (c) 1990 University of Utah. | |
3 | * Copyright (c) 1991 The Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
6 | * This code is derived from software contributed to Berkeley by | |
7 | * the Systems Programming Group of the University of Utah Computer | |
8 | * Science Department. | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. All advertising materials mentioning features or use of this software | |
19 | * must display the following acknowledgement: | |
20 | * This product includes software developed by the University of | |
21 | * California, Berkeley and its contributors. | |
22 | * 4. Neither the name of the University nor the names of its contributors | |
23 | * may be used to endorse or promote products derived from this software | |
24 | * without specific prior written permission. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
36 | * SUCH DAMAGE. | |
37 | * | |
38 | * @(#)vnode_pager.h 7.1 (Berkeley) 12/5/90 | |
39 | */ | |
40 | ||
41 | #ifndef _VNODE_PAGER_ | |
42 | #define _VNODE_PAGER_ 1 | |
43 | ||
44 | /* | |
45 | * VNODE pager private data. | |
46 | */ | |
47 | struct vnpager { | |
48 | int vnp_flags; /* flags */ | |
49 | struct vnode *vnp_vp; /* vnode */ | |
50 | vm_size_t vnp_size; /* vnode current size */ | |
51 | }; | |
52 | typedef struct vnpager *vn_pager_t; | |
53 | ||
54 | #define VN_PAGER_NULL ((vn_pager_t)0) | |
55 | ||
56 | #define VNP_PAGING 0x01 /* vnode used for pageout */ | |
57 | #define VNP_CACHED 0x02 /* vnode is cached */ | |
58 | ||
59 | #ifdef KERNEL | |
60 | ||
61 | void vnode_pager_init(); | |
62 | vm_pager_t vnode_pager_alloc(); | |
63 | void vnode_pager_dealloc(); | |
64 | int vnode_pager_getpage(), vnode_pager_putpage(); | |
65 | boolean_t vnode_pager_haspage(); | |
66 | ||
67 | struct pagerops vnodepagerops = { | |
68 | vnode_pager_init, | |
69 | vnode_pager_alloc, | |
70 | vnode_pager_dealloc, | |
71 | vnode_pager_getpage, | |
72 | vnode_pager_putpage, | |
73 | vnode_pager_haspage | |
74 | }; | |
75 | ||
76 | #endif | |
77 | ||
78 | #endif /* _VNODE_PAGER_ */ |