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/* $OpenBSD: umap.h,v 1.13 2003/08/14 07:46:40 mickey Exp $ */
/* $NetBSD: umap.h,v 1.9 1999/07/08 01:19:06 wrstuden 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. 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 8.4 (Berkeley) 8/20/94
*/
#include <miscfs/genfs/layer.h>
#define UMAPFILEENTRIES 64
#define GMAPFILEENTRIES 16
#define NOBODY 32767
#define NULLGROUP 65534
struct umap_args {
struct layer_args la; /* generic layerfs args. Includes
* target and export info */
#define umap_target la.target
#define umap_export la.export
int unentries; /* # of entries in user map array */
int gnentries; /* # of entries in group map array */
u_long (*umapdata)[2]; /* pointer to array of user mappings */
u_long (*gmapdata)[2]; /* pointer to array of group mappings */
};
#ifdef _KERNEL
struct umap_mount {
struct layer_mount lm;
int info_unentries; /* number of uid mappings */
int info_gnentries; /* number of gid mappings */
u_long info_umapdata[UMAPFILEENTRIES][2]; /* mapping data for
user mapping in ficus */
u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for
group mapping in ficus */
};
#define umapm_vfs lm.layerm_vfs
#define umapm_rootvp lm.layerm_rootvp
#define umapm_export lm.layerm_export
#define umapm_flags lm.layerm_flags
#define umapm_size lm.layerm_size
#define umapm_tag lm.layerm_tag
#define umapm_bypass lm.layerm_bypass
#define umapm_alloc lm.layerm_alloc
#define umapm_vnodeop_p lm.layerm_vnodeop_p
#define umapm_node_hashtbl lm.layerm_node_hashtbl
#define umapm_node_hash lm.layerm_node_hash
#define umapm_hashlock lm.layerm_hashlock
/*
* A cache of vnode references
*/
struct umap_node {
struct layer_node ln;
};
u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries);
void umap_mapids(struct mount *v_mount, struct ucred *credp);
#define umap_hash ln.layer_hash
#define umap_lowervp ln.layer_lowervp
#define umap_vnode ln.layer_vnode
#define umap_flags ln.layer_flags
#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
#define UMAPVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__)
#else
#define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp)
#endif
extern int (**umapfs_vnodeop_p)(void *);
extern const struct vfsops umapfs_vfsops;
int umap_bypass(void *);
#define NUMAPNODECACHE 16
#endif /* _KERNEL */
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