193 lines
6.1 KiB
C
193 lines
6.1 KiB
C
/* $NetBSD: umap_subr.c,v 1.16 2000/03/13 23:52:41 soren Exp $ */
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/*
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* Copyright (c) 1999 National Aeronautics & Space Administration
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* All rights reserved.
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*
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* This software was written by William Studenmund of the
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* Numerical Aerospace Similation Facility, NASA Ames Research Center.
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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. Neither the name of the National Aeronautics & Space Administration
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* nor the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB-
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* UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1992, 1993, 1995
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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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* Jan-Simon Pendry.
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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: Id: lofs_subr.c, v 1.11 1992/05/30 10:05:43 jsp Exp
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* @(#)umap_subr.c 8.9 (Berkeley) 5/14/95
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/malloc.h>
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#include <miscfs/specfs/specdev.h>
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#include <miscfs/umapfs/umap.h>
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u_long umap_findid __P((u_long, u_long [][2], int));
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int umap_node_alloc __P((struct mount *, struct vnode *,
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struct vnode **));
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/*
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* umap_findid is called by various routines in umap_vnodeops.c to
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* find a user or group id in a map.
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*/
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u_long
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umap_findid(id, map, nentries)
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u_long id;
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u_long map[][2];
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int nentries;
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{
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int i;
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/* Find uid entry in map */
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i = 0;
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while ((i<nentries) && ((map[i][0]) != id))
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i++;
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if (i < nentries)
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return (map[i][1]);
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else
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return (-1);
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}
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/*
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* umap_reverse_findid is called by umap_getattr() in umap_vnodeops.c to
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* find a user or group id in a map, in reverse.
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*/
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u_long
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umap_reverse_findid(id, map, nentries)
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u_long id;
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u_long map[][2];
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int nentries;
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{
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int i;
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/* Find uid entry in map */
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i = 0;
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while ((i<nentries) && ((map[i][1]) != id))
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i++;
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if (i < nentries)
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return (map[i][0]);
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else
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return (-1);
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}
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/* umap_mapids maps all of the ids in a credential, both user and group. */
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void
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umap_mapids(v_mount, credp)
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struct mount *v_mount;
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struct ucred *credp;
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{
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int i, unentries, gnentries;
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uid_t uid;
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gid_t gid;
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u_long (*usermap)[2], (*groupmap)[2];
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if (credp == NOCRED)
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return;
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unentries = MOUNTTOUMAPMOUNT(v_mount)->info_nentries;
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usermap = MOUNTTOUMAPMOUNT(v_mount)->info_mapdata;
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gnentries = MOUNTTOUMAPMOUNT(v_mount)->info_gnentries;
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groupmap = MOUNTTOUMAPMOUNT(v_mount)->info_gmapdata;
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/* Find uid entry in map */
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uid = (uid_t) umap_findid(credp->cr_uid, usermap, unentries);
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if (uid != -1)
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credp->cr_uid = uid;
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else
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credp->cr_uid = (uid_t) NOBODY;
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#if 1
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/* cr_gid is the same as cr_groups[0] in 4BSD, but not in NetBSD */
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/* Find gid entry in map */
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gid = (gid_t) umap_findid(credp->cr_gid, groupmap, gnentries);
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if (gid != -1)
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credp->cr_gid = gid;
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else
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credp->cr_gid = NULLGROUP;
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#endif
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/* Now we must map each of the set of groups in the cr_groups
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structure. */
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for(i=0; i < credp->cr_ngroups; i++) {
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gid = (gid_t) umap_findid(credp->cr_groups[i],
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groupmap, gnentries);
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if (gid != -1)
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credp->cr_groups[i] = gid;
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else
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credp->cr_groups[i] = NULLGROUP;
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}
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}
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