1 | /* $NetBSD: umap.h,v 1.16 2008/06/28 01:34:06 rumble Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1992, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * |
7 | * This code is derived from software donated to Berkeley by |
8 | * the UCLA Ficus project. |
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 University nor the names of its contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | * |
34 | * from: @(#)null_vnops.c 1.5 (Berkeley) 7/10/92 |
35 | * @(#)umap.h 8.4 (Berkeley) 8/20/94 |
36 | */ |
37 | |
38 | #include <miscfs/genfs/layer.h> |
39 | |
40 | #define MAPFILEENTRIES 64 |
41 | #define GMAPFILEENTRIES 16 |
42 | #define NOBODY 32767 |
43 | #define NULLGROUP 65534 |
44 | |
45 | struct umap_args { |
46 | struct layer_args la; /* generic layerfs args. Includes |
47 | * target and export info */ |
48 | #define umap_target la.target |
49 | #define umap_export la.export |
50 | int nentries; /* # of entries in user map array */ |
51 | int gnentries; /* # of entries in group map array */ |
52 | u_long (*mapdata)[2]; /* pointer to array of user mappings */ |
53 | u_long (*gmapdata)[2]; /* pointer to array of group mappings */ |
54 | }; |
55 | |
56 | #ifdef _KERNEL |
57 | |
58 | struct umap_mount { |
59 | struct layer_mount lm; |
60 | int info_nentries; /* number of uid mappings */ |
61 | int info_gnentries; /* number of gid mappings */ |
62 | u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for |
63 | user mapping in ficus */ |
64 | u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for |
65 | group mapping in ficus */ |
66 | }; |
67 | #define umapm_vfs lm.layerm_vfs |
68 | #define umapm_rootvp lm.layerm_rootvp |
69 | #define umapm_export lm.layerm_export |
70 | #define umapm_flags lm.layerm_flags |
71 | #define umapm_size lm.layerm_size |
72 | #define umapm_tag lm.layerm_tag |
73 | #define umapm_bypass lm.layerm_bypass |
74 | #define umapm_alloc lm.layerm_alloc |
75 | #define umapm_vnodeop_p lm.layerm_vnodeop_p |
76 | #define umapm_node_hashtbl lm.layerm_node_hashtbl |
77 | #define umapm_node_hash lm.layerm_node_hash |
78 | #define umapm_hashlock lm.layerm_hashlock |
79 | |
80 | /* |
81 | * A cache of vnode references |
82 | */ |
83 | struct umap_node { |
84 | struct layer_node ln; |
85 | }; |
86 | |
87 | u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries); |
88 | void umap_mapids(struct mount *v_mount, kauth_cred_t credp); |
89 | |
90 | #define umap_hash ln.layer_hash |
91 | #define umap_lowervp ln.layer_lowervp |
92 | #define umap_vnode ln.layer_vnode |
93 | #define umap_flags ln.layer_flags |
94 | |
95 | #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data)) |
96 | #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data) |
97 | #define UMAPTOV(xp) ((xp)->umap_vnode) |
98 | #ifdef UMAPFS_DIAGNOSTIC |
99 | #define UMAPVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__) |
100 | #else |
101 | #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp) |
102 | #endif |
103 | |
104 | extern int (**umap_vnodeop_p)(void *); |
105 | extern struct vfsops umapfs_vfsops; |
106 | |
107 | int umap_bypass(void *); |
108 | |
109 | #define NUMAPNODECACHE 16 |
110 | |
111 | #endif /* _KERNEL */ |
112 | |