1 /* $NetBSD: umap.h,v 1.9 1999/07/08 01:19:06 wrstuden Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software donated to Berkeley by 8 * the UCLA Ficus project. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: @(#)null_vnops.c 1.5 (Berkeley) 7/10/92 39 * @(#)umap.h 8.4 (Berkeley) 8/20/94 40 */ 41 42 #include <miscfs/genfs/layer.h> 43 44 #define MAPFILEENTRIES 64 45 #define GMAPFILEENTRIES 16 46 #define NOBODY 32767 47 #define NULLGROUP 65534 48 49 struct umap_args { 50 struct layer_args la; /* generic layerfs args. Includes 51 * target and export info */ 52 #define umap_target la.target 53 #define umap_export la.export 54 int nentries; /* # of entries in user map array */ 55 int gnentries; /* # of entries in group map array */ 56 u_long (*mapdata)[2]; /* pointer to array of user mappings */ 57 u_long (*gmapdata)[2]; /* pointer to array of group mappings */ 58 }; 59 60 #ifdef _KERNEL 61 62 struct umap_mount { 63 struct layer_mount lm; 64 int info_nentries; /* number of uid mappings */ 65 int info_gnentries; /* number of gid mappings */ 66 u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for 67 user mapping in ficus */ 68 u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for 69 group mapping in ficus */ 70 }; 71 #define umapm_vfs lm.layerm_vfs 72 #define umapm_rootvp lm.layerm_rootvp 73 #define umapm_export lm.layerm_export 74 #define umapm_flags lm.layerm_flags 75 #define umapm_size lm.layerm_size 76 #define umapm_tag lm.layerm_tag 77 #define umapm_bypass lm.layerm_bypass 78 #define umapm_alloc lm.layerm_alloc 79 #define umapm_vnodeop_p lm.layerm_vnodeop_p 80 #define umapm_node_hashtbl lm.layerm_node_hashtbl 81 #define umapm_node_hash lm.layerm_node_hash 82 #define umapm_hashlock lm.layerm_hashlock 83 84 /* 85 * A cache of vnode references 86 */ 87 struct umap_node { 88 struct layer_node ln; 89 }; 90 91 u_long umap_reverse_findid __P((u_long id, u_long map[][2], int nentries)); 92 void umap_mapids __P((struct mount *v_mount, struct ucred *credp)); 93 94 #define umap_hash ln.layer_hash 95 #define umap_lowervp ln.layer_lowervp 96 #define umap_vnode ln.layer_vnode 97 #define umap_flags ln.layer_flags 98 99 #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data)) 100 #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data) 101 #define UMAPTOV(xp) ((xp)->umap_vnode) 102 #ifdef UMAPFS_DIAGNOSTIC 103 #define UMAPVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__) 104 #else 105 #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp) 106 #endif 107 108 extern int (**umap_vnodeop_p) __P((void *)); 109 extern struct vfsops umapfs_vfsops; 110 111 int umap_bypass __P((void *)); 112 113 #define NUMAPNODECACHE 16 114 115 #endif /* _KERNEL */ 116