1*81f5c57cSperseant /* $NetBSD: umap.h,v 1.19 2019/08/20 21:18:10 perseant Exp $ */ 2cf92afd6Scgd 3cde1d475Smycroft /* 4cde1d475Smycroft * Copyright (c) 1992, 1993 5cde1d475Smycroft * The Regents of the University of California. All rights reserved. 6cde1d475Smycroft * 7cde1d475Smycroft * This code is derived from software donated to Berkeley by 8cde1d475Smycroft * the UCLA Ficus project. 9cde1d475Smycroft * 10cde1d475Smycroft * Redistribution and use in source and binary forms, with or without 11cde1d475Smycroft * modification, are permitted provided that the following conditions 12cde1d475Smycroft * are met: 13cde1d475Smycroft * 1. Redistributions of source code must retain the above copyright 14cde1d475Smycroft * notice, this list of conditions and the following disclaimer. 15cde1d475Smycroft * 2. Redistributions in binary form must reproduce the above copyright 16cde1d475Smycroft * notice, this list of conditions and the following disclaimer in the 17cde1d475Smycroft * documentation and/or other materials provided with the distribution. 18aad01611Sagc * 3. Neither the name of the University nor the names of its contributors 19cde1d475Smycroft * may be used to endorse or promote products derived from this software 20cde1d475Smycroft * without specific prior written permission. 21cde1d475Smycroft * 22cde1d475Smycroft * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23cde1d475Smycroft * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24cde1d475Smycroft * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25cde1d475Smycroft * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26cde1d475Smycroft * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27cde1d475Smycroft * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28cde1d475Smycroft * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29cde1d475Smycroft * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30cde1d475Smycroft * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31cde1d475Smycroft * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32cde1d475Smycroft * SUCH DAMAGE. 33cde1d475Smycroft * 34cde1d475Smycroft * from: @(#)null_vnops.c 1.5 (Berkeley) 7/10/92 35e5bc90f4Sfvdl * @(#)umap.h 8.4 (Berkeley) 8/20/94 36cde1d475Smycroft */ 37cde1d475Smycroft 389866514dSwrstuden #include <miscfs/genfs/layer.h> 399866514dSwrstuden 40cde1d475Smycroft #define MAPFILEENTRIES 64 41cde1d475Smycroft #define GMAPFILEENTRIES 16 42cde1d475Smycroft #define NOBODY 32767 43cde1d475Smycroft #define NULLGROUP 65534 44cde1d475Smycroft 45cde1d475Smycroft struct umap_args { 469866514dSwrstuden struct layer_args la; /* generic layerfs args. Includes 479866514dSwrstuden * target and export info */ 489866514dSwrstuden #define umap_target la.target 499866514dSwrstuden #define umap_export la.export 50cde1d475Smycroft int nentries; /* # of entries in user map array */ 51cde1d475Smycroft int gnentries; /* # of entries in group map array */ 52df052e72Scgd u_long (*mapdata)[2]; /* pointer to array of user mappings */ 53df052e72Scgd u_long (*gmapdata)[2]; /* pointer to array of group mappings */ 54cfd321e5Sperseant u_long fsid; /* user-supplied per-fs ident */ 55cde1d475Smycroft }; 56cde1d475Smycroft 579866514dSwrstuden #ifdef _KERNEL 589866514dSwrstuden 59cde1d475Smycroft struct umap_mount { 609866514dSwrstuden struct layer_mount lm; 61cde1d475Smycroft int info_nentries; /* number of uid mappings */ 62cde1d475Smycroft int info_gnentries; /* number of gid mappings */ 63df052e72Scgd u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for 64cde1d475Smycroft user mapping in ficus */ 65df052e72Scgd u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for 66cde1d475Smycroft group mapping in ficus */ 67cde1d475Smycroft }; 689866514dSwrstuden #define umapm_rootvp lm.layerm_rootvp 699866514dSwrstuden #define umapm_export lm.layerm_export 709866514dSwrstuden #define umapm_flags lm.layerm_flags 719866514dSwrstuden #define umapm_size lm.layerm_size 729866514dSwrstuden #define umapm_tag lm.layerm_tag 739866514dSwrstuden #define umapm_bypass lm.layerm_bypass 749866514dSwrstuden #define umapm_alloc lm.layerm_alloc 759866514dSwrstuden #define umapm_vnodeop_p lm.layerm_vnodeop_p 769866514dSwrstuden #define umapm_node_hashtbl lm.layerm_node_hashtbl 779866514dSwrstuden #define umapm_node_hash lm.layerm_node_hash 789866514dSwrstuden #define umapm_hashlock lm.layerm_hashlock 79cde1d475Smycroft 80cde1d475Smycroft /* 81cde1d475Smycroft * A cache of vnode references 82cde1d475Smycroft */ 83cde1d475Smycroft struct umap_node { 849866514dSwrstuden struct layer_node ln; 85cde1d475Smycroft }; 86cde1d475Smycroft 87af97f2e8Sxtraeme u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries); 88fc9422c9Selad void umap_mapids(struct mount *v_mount, kauth_cred_t credp); 899866514dSwrstuden 909866514dSwrstuden #define umap_hash ln.layer_hash 919866514dSwrstuden #define umap_lowervp ln.layer_lowervp 929866514dSwrstuden #define umap_vnode ln.layer_vnode 939866514dSwrstuden #define umap_flags ln.layer_flags 94cde1d475Smycroft 95cde1d475Smycroft #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data)) 96cde1d475Smycroft #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data) 97cde1d475Smycroft #define UMAPTOV(xp) ((xp)->umap_vnode) 98*81f5c57cSperseant #ifdef UMAPFS_DIAGNOSTIC 999866514dSwrstuden #define UMAPVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__) 100*81f5c57cSperseant #else 101cde1d475Smycroft #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp) 102*81f5c57cSperseant #endif 103cde1d475Smycroft 104af97f2e8Sxtraeme extern int (**umap_vnodeop_p)(void *); 105c9efd056Sthorpej extern struct vfsops umapfs_vfsops; 106631ccba6Schristos 107af97f2e8Sxtraeme int umap_bypass(void *); 1089866514dSwrstuden 1099866514dSwrstuden #define NUMAPNODECACHE 16 110631ccba6Schristos 1116efcd1b6Sbriggs #endif /* _KERNEL */ 112