1 | /* $NetBSD: null.h,v 1.19 2010/07/02 03:16:01 rmind Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1999 National Aeronautics & Space Administration |
5 | * All rights reserved. |
6 | * |
7 | * This software was written by William Studenmund of the |
8 | * Numerical Aerospace Simulation Facility, NASA Ames Research Center. |
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. Neither the name of the National Aeronautics & Space Administration |
19 | * nor the names of its contributors may be used to endorse or promote |
20 | * products derived from this software without specific prior written |
21 | * permission. |
22 | * |
23 | * THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION |
24 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
25 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
26 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB- |
27 | * UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
28 | * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
33 | * POSSIBILITY OF SUCH DAMAGE. |
34 | */ |
35 | |
36 | /* |
37 | * Copyright (c) 1992, 1993 |
38 | * The Regents of the University of California. All rights reserved. |
39 | * |
40 | * This code is derived from software donated to Berkeley by |
41 | * Jan-Simon Pendry. |
42 | * |
43 | * Redistribution and use in source and binary forms, with or without |
44 | * modification, are permitted provided that the following conditions |
45 | * are met: |
46 | * 1. Redistributions of source code must retain the above copyright |
47 | * notice, this list of conditions and the following disclaimer. |
48 | * 2. Redistributions in binary form must reproduce the above copyright |
49 | * notice, this list of conditions and the following disclaimer in the |
50 | * documentation and/or other materials provided with the distribution. |
51 | * 3. Neither the name of the University nor the names of its contributors |
52 | * may be used to endorse or promote products derived from this software |
53 | * without specific prior written permission. |
54 | * |
55 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
56 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
57 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
58 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
59 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
60 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
61 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
62 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
63 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
64 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
65 | * SUCH DAMAGE. |
66 | * |
67 | * from: Id: lofs.h,v 1.8 1992/05/30 10:05:43 jsp Exp |
68 | * @(#)null.h 8.2 (Berkeley) 1/21/94 |
69 | */ |
70 | |
71 | #ifndef _MISCFS_NULLFS_H_ |
72 | #define _MISCFS_NULLFS_H_ |
73 | |
74 | #include <miscfs/genfs/layer.h> |
75 | |
76 | struct null_args { |
77 | struct layer_args la; /* generic layerfs args */ |
78 | }; |
79 | #define nulla_target la.target |
80 | #define nulla_export la.export |
81 | |
82 | #ifdef _KERNEL |
83 | struct null_mount { |
84 | struct layer_mount lm; /* generic layerfs mount stuff */ |
85 | }; |
86 | #define nullm_vfs lm.layerm_vfs |
87 | #define nullm_rootvp lm.layerm_rootvp |
88 | #define nullm_export lm.layerm_export |
89 | #define nullm_flags lm.layerm_flags |
90 | #define nullm_size lm.layerm_size |
91 | #define nullm_tag lm.layerm_tag |
92 | #define nullm_bypass lm.layerm_bypass |
93 | #define nullm_alloc lm.layerm_alloc |
94 | #define nullm_vnodeop_p lm.layerm_vnodeop_p |
95 | #define nullm_node_hashtbl lm.layerm_node_hashtbl |
96 | #define nullm_node_hash lm.layerm_node_hash |
97 | #define nullm_hashlock lm.layerm_hashlock |
98 | |
99 | /* |
100 | * A cache of vnode references |
101 | */ |
102 | struct null_node { |
103 | struct layer_node ln; |
104 | }; |
105 | #define null_hash ln.layer_hash |
106 | #define null_lowervp ln.layer_lowervp |
107 | #define null_vnode ln.layer_vnode |
108 | #define null_flags ln.layer_flags |
109 | |
110 | #define MOUNTTONULLMOUNT(mp) ((struct null_mount *)((mp)->mnt_data)) |
111 | |
112 | extern int (**null_vnodeop_p)(void *); |
113 | extern struct vfsops nullfs_vfsops; |
114 | |
115 | void nullfs_init(void); |
116 | |
117 | #endif /* _KERNEL */ |
118 | #endif /* _MISCFS_NULLFS_H_ */ |
119 | |