FreeBSD/Linux Kernel Cross Reference
sys/fs/umapfs/umap.h
1 /*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software donated to Berkeley by
6 * the UCLA Ficus project.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)umap.h 8.4 (Berkeley) 8/20/94
33 *
34 * $FreeBSD: releng/6.0/sys/fs/umapfs/umap.h 139776 2005-01-06 18:10:42Z imp $
35 */
36
37 #define MAPFILEENTRIES 64
38 #define GMAPFILEENTRIES 16
39 #define NOBODY 32767
40 #define NULLGROUP 65534
41
42 struct umap_args {
43 char *target; /* Target of loopback */
44 int nentries; /* # of entries in user map array */
45 int gnentries; /* # of entries in group map array */
46 u_long (*mapdata)[2]; /* pointer to array of user mappings */
47 u_long (*gmapdata)[2]; /* pointer to array of group mappings */
48 };
49
50 struct umap_mount {
51 struct mount *umapm_vfs;
52 struct vnode *umapm_rootvp; /* Reference to root umap_node */
53 int info_nentries; /* number of uid mappings */
54 int info_gnentries; /* number of gid mappings */
55 u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for
56 user mapping in ficus */
57 u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for
58 group mapping in ficus */
59 };
60
61 #ifdef _KERNEL
62 /*
63 * A cache of vnode references
64 */
65 struct umap_node {
66 LIST_ENTRY(umap_node) umap_hash; /* Hash list */
67 struct vnode *umap_lowervp; /* Aliased vnode - VREFed once */
68 struct vnode *umap_vnode; /* Back pointer to vnode/umap_node */
69 };
70
71 extern int umapfs_init(struct vfsconf *vfsp);
72 extern int umap_node_create(struct mount *mp, struct vnode *target, struct vnode **vpp);
73 extern u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries);
74 extern void umap_mapids(struct mount *v_mount, struct ucred *credp);
75
76 #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data))
77 #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data)
78 #define UMAPTOV(xp) ((xp)->umap_vnode)
79 #ifdef DIAGNOSTIC
80 extern struct vnode *umap_checkvp(struct vnode *vp, char *fil, int lno);
81 #define UMAPVPTOLOWERVP(vp) umap_checkvp((vp), __FILE__, __LINE__)
82 #else
83 #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp)
84 #endif
85
86 #endif /* _KERNEL */
Cache object: 89e08cd433709c777803f5426f5addf3
|