116 lines
4.2 KiB
C
116 lines
4.2 KiB
C
/* $NetBSD: umap.h,v 1.9 1999/07/08 01:19:06 wrstuden Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* the UCLA Ficus project.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)null_vnops.c 1.5 (Berkeley) 7/10/92
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* @(#)umap.h 8.4 (Berkeley) 8/20/94
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*/
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#include <miscfs/genfs/layer.h>
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#define MAPFILEENTRIES 64
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#define GMAPFILEENTRIES 16
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#define NOBODY 32767
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#define NULLGROUP 65534
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struct umap_args {
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struct layer_args la; /* generic layerfs args. Includes
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* target and export info */
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#define umap_target la.target
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#define umap_export la.export
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int nentries; /* # of entries in user map array */
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int gnentries; /* # of entries in group map array */
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u_long (*mapdata)[2]; /* pointer to array of user mappings */
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u_long (*gmapdata)[2]; /* pointer to array of group mappings */
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};
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#ifdef _KERNEL
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struct umap_mount {
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struct layer_mount lm;
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int info_nentries; /* number of uid mappings */
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int info_gnentries; /* number of gid mappings */
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u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for
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user mapping in ficus */
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u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for
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group mapping in ficus */
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};
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#define umapm_vfs lm.layerm_vfs
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#define umapm_rootvp lm.layerm_rootvp
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#define umapm_export lm.layerm_export
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#define umapm_flags lm.layerm_flags
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#define umapm_size lm.layerm_size
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#define umapm_tag lm.layerm_tag
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#define umapm_bypass lm.layerm_bypass
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#define umapm_alloc lm.layerm_alloc
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#define umapm_vnodeop_p lm.layerm_vnodeop_p
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#define umapm_node_hashtbl lm.layerm_node_hashtbl
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#define umapm_node_hash lm.layerm_node_hash
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#define umapm_hashlock lm.layerm_hashlock
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/*
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* A cache of vnode references
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*/
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struct umap_node {
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struct layer_node ln;
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};
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u_long umap_reverse_findid __P((u_long id, u_long map[][2], int nentries));
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void umap_mapids __P((struct mount *v_mount, struct ucred *credp));
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#define umap_hash ln.layer_hash
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#define umap_lowervp ln.layer_lowervp
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#define umap_vnode ln.layer_vnode
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#define umap_flags ln.layer_flags
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#define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data))
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#define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data)
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#define UMAPTOV(xp) ((xp)->umap_vnode)
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#ifdef UMAPFS_DIAGNOSTIC
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#define UMAPVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__)
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#else
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#define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp)
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#endif
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extern int (**umap_vnodeop_p) __P((void *));
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extern struct vfsops umapfs_vfsops;
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int umap_bypass __P((void *));
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#define NUMAPNODECACHE 16
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#endif /* _KERNEL */
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