2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software donated to Berkeley by
6 * the UCLA Ficus project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)umap.h 8.4 (Berkeley) 8/20/94
38 * $FreeBSD: src/sys/miscfs/umapfs/umap.h,v 1.13 1999/12/29 04:54:47 peter Exp $
39 * $DragonFly: src/sys/vfs/umapfs/Attic/umap.h,v 1.8 2006/01/04 03:09:54 dillon Exp $
42 #define MAPFILEENTRIES 64
43 #define GMAPFILEENTRIES 16
45 #define NULLGROUP 65534
48 char *target; /* Target of loopback */
49 int nentries; /* # of entries in user map array */
50 int gnentries; /* # of entries in group map array */
51 u_long (*mapdata)[2]; /* pointer to array of user mappings */
52 u_long (*gmapdata)[2]; /* pointer to array of group mappings */
56 struct mount *umapm_vfs;
57 struct vnode *umapm_rootvp; /* Reference to root umap_node */
58 int info_nentries; /* number of uid mappings */
59 int info_gnentries; /* number of gid mappings */
60 u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for
61 user mapping in ficus */
62 u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for
63 group mapping in ficus */
68 * A cache of vnode references
71 struct umap_node *umap_next; /* Hash list */
72 struct vnode *umap_lowervp; /* vrefed once */
73 struct vnode *umap_vnode; /* Back pointer */
76 extern int umapfs_init (struct vfsconf *vfsp);
77 extern int umap_node_create (struct mount *mp, struct vnode *target, struct vnode **vpp);
78 extern u_long umap_reverse_findid (u_long id, u_long map[][2], int nentries);
79 extern void umap_mapids (struct mount *v_mount, struct ucred *credp);
80 extern void umap_node_delete(struct umap_node *xp);
82 #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data))
83 #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data)
84 #define UMAPTOV(xp) ((xp)->umap_vnode)
86 extern struct vnode *umap_checkvp (struct vnode *vp, char *fil, int lno);
87 #define UMAPVPTOLOWERVP(vp) umap_checkvp((vp), __FILE__, __LINE__)
89 #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp)