1 /* $NetBSD: umap_subr.c,v 1.19 2001/11/15 09:48:23 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1999 National Aeronautics & Space Administration 5 * All rights reserved. 6 * 7 * This software was written by William Studenmund of the 8 * Numerical Aerospace Simulation Facility, NASA Ames Research Center. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the National Aeronautics & Space Administration 19 * nor the names of its contributors may be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB- 27 * UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 28 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /* 36 * Copyright (c) 1992, 1993, 1995 37 * The Regents of the University of California. All rights reserved. 38 * 39 * This code is derived from software donated to Berkeley by 40 * Jan-Simon Pendry. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * from: Id: lofs_subr.c, v 1.11 1992/05/30 10:05:43 jsp Exp 71 * @(#)umap_subr.c 8.9 (Berkeley) 5/14/95 72 */ 73 74 #include <sys/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: umap_subr.c,v 1.19 2001/11/15 09:48:23 lukem Exp $"); 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/proc.h> 80 #include <sys/time.h> 81 #include <sys/vnode.h> 82 #include <sys/mount.h> 83 #include <sys/namei.h> 84 #include <sys/malloc.h> 85 #include <miscfs/specfs/specdev.h> 86 #include <miscfs/umapfs/umap.h> 87 88 u_long umap_findid __P((u_long, u_long [][2], int)); 89 int umap_node_alloc __P((struct mount *, struct vnode *, 90 struct vnode **)); 91 92 /* 93 * umap_findid is called by various routines in umap_vnodeops.c to 94 * find a user or group id in a map. 95 */ 96 u_long 97 umap_findid(id, map, nentries) 98 u_long id; 99 u_long map[][2]; 100 int nentries; 101 { 102 int i; 103 104 /* Find uid entry in map */ 105 i = 0; 106 while ((i<nentries) && ((map[i][0]) != id)) 107 i++; 108 109 if (i < nentries) 110 return (map[i][1]); 111 else 112 return (-1); 113 114 } 115 116 /* 117 * umap_reverse_findid is called by umap_getattr() in umap_vnodeops.c to 118 * find a user or group id in a map, in reverse. 119 */ 120 u_long 121 umap_reverse_findid(id, map, nentries) 122 u_long id; 123 u_long map[][2]; 124 int nentries; 125 { 126 int i; 127 128 /* Find uid entry in map */ 129 i = 0; 130 while ((i<nentries) && ((map[i][1]) != id)) 131 i++; 132 133 if (i < nentries) 134 return (map[i][0]); 135 else 136 return (-1); 137 138 } 139 140 /* umap_mapids maps all of the ids in a credential, both user and group. */ 141 142 void 143 umap_mapids(v_mount, credp) 144 struct mount *v_mount; 145 struct ucred *credp; 146 { 147 int i, unentries, gnentries; 148 uid_t uid; 149 gid_t gid; 150 u_long (*usermap)[2], (*groupmap)[2]; 151 152 if (credp == NOCRED) 153 return; 154 155 unentries = MOUNTTOUMAPMOUNT(v_mount)->info_nentries; 156 usermap = MOUNTTOUMAPMOUNT(v_mount)->info_mapdata; 157 gnentries = MOUNTTOUMAPMOUNT(v_mount)->info_gnentries; 158 groupmap = MOUNTTOUMAPMOUNT(v_mount)->info_gmapdata; 159 160 /* Find uid entry in map */ 161 162 uid = (uid_t) umap_findid(credp->cr_uid, usermap, unentries); 163 164 if (uid != -1) 165 credp->cr_uid = uid; 166 else 167 credp->cr_uid = (uid_t) NOBODY; 168 169 #if 1 170 /* cr_gid is the same as cr_groups[0] in 4BSD, but not in NetBSD */ 171 172 /* Find gid entry in map */ 173 174 gid = (gid_t) umap_findid(credp->cr_gid, groupmap, gnentries); 175 176 if (gid != -1) 177 credp->cr_gid = gid; 178 else 179 credp->cr_gid = NULLGROUP; 180 #endif 181 182 /* Now we must map each of the set of groups in the cr_groups 183 structure. */ 184 185 for(i=0; i < credp->cr_ngroups; i++) { 186 gid = (gid_t) umap_findid(credp->cr_groups[i], 187 groupmap, gnentries); 188 189 if (gid != -1) 190 credp->cr_groups[i] = gid; 191 else 192 credp->cr_groups[i] = NULLGROUP; 193 } 194 } 195