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/* $OpenBSD: umap.h,v 1.9 2002/03/14 01:27:08 millert Exp $ */
/* $NetBSD: umap.h,v 1.6 1996/02/09 22:41:00 christos Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software donated to Berkeley by
* the UCLA Ficus project.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)null_vnops.c 1.5 (Berkeley) 7/10/92
* @(#)umap.h 8.3 (Berkeley) 1/21/94
*/
#define UMAPFILEENTRIES 64
#define GMAPFILEENTRIES 16
#define NOBODY 32767
#define NULLGROUP 65534
typedef u_int32_t id_t;
typedef id_t (*id_map_t)[2];
struct umap_args {
char *target; /* Target of loopback */
int unentries; /* # of entries in user map array */
int gnentries; /* # of entries in group map array */
id_map_t umapdata; /* pointer to array of user mappings */
id_map_t gmapdata; /* pointer to array of group mappings */
};
struct umap_mount {
struct mount *umapm_vfs;
struct vnode *umapm_rootvp; /* Reference to root umap_node */
int info_unentries; /* number of uid mappings */
int info_gnentries; /* number of gid mappings */
id_t info_umapdata[UMAPFILEENTRIES][2]; /* mapping data for
user mapping in ficus */
id_t info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for
group mapping in ficus */
};
#ifdef _KERNEL
/*
* A cache of vnode references
*/
struct umap_node {
LIST_ENTRY(umap_node) umap_hash; /* Hash list */
struct vnode *umap_lowervp; /* Aliased vnode - VREFed once */
struct vnode *umap_vnode; /* Back pointer to vnode/umap_node */
};
extern int umap_node_create(struct mount *mp, struct vnode *target, struct vnode **vpp);
extern id_t umap_reverse_findid(id_t id, id_map_t, int nentries);
extern void umap_mapids(struct mount *v_mount, struct ucred *credp);
#define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data))
#define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data)
#define UMAPTOV(xp) ((xp)->umap_vnode)
#ifdef UMAPFS_DIAGNOSTIC
extern struct vnode *umap_checkvp(struct vnode *vp, char *fil, int lno);
#define UMAPVPTOLOWERVP(vp) umap_checkvp((vp), __FILE__, __LINE__)
#else
#define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp)
#endif
extern int (**umap_vnodeop_p)(void *);
extern struct vfsops umap_vfsops;
int umapfs_init(struct vfsconf *);
#endif /* _KERNEL */
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