92 lines
3.7 KiB
C
92 lines
3.7 KiB
C
/*
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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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* @(#)umap.h 8.4 (Berkeley) 8/20/94
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*
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* $FreeBSD$
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*/
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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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char *target; /* Target of loopback */
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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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struct umap_mount {
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struct mount *umapm_vfs;
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struct vnode *umapm_rootvp; /* Reference to root umap_node */
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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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#ifdef _KERNEL
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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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LIST_ENTRY(umap_node) umap_hash; /* Hash list */
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struct vnode *umap_lowervp; /* Aliased vnode - VREFed once */
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struct vnode *umap_vnode; /* Back pointer to vnode/umap_node */
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};
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extern int umapfs_init(struct vfsconf *vfsp);
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extern int umap_node_create(struct mount *mp, struct vnode *target, struct vnode **vpp);
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extern u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries);
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extern void umap_mapids(struct mount *v_mount, struct ucred *credp);
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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 DIAGNOSTIC
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extern struct vnode *umap_checkvp(struct vnode *vp, char *fil, int lno);
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#define UMAPVPTOLOWERVP(vp) umap_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 vop_t **umap_vnodeop_p;
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#endif /* _KERNEL */
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