| 1 | /* $NetBSD: umap.h,v 1.16 2008/06/28 01:34:06 rumble 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. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * from: @(#)null_vnops.c 1.5 (Berkeley) 7/10/92 |
| 35 | * @(#)umap.h 8.4 (Berkeley) 8/20/94 |
| 36 | */ |
| 37 | |
| 38 | #include <miscfs/genfs/layer.h> |
| 39 | |
| 40 | #define MAPFILEENTRIES 64 |
| 41 | #define GMAPFILEENTRIES 16 |
| 42 | #define NOBODY 32767 |
| 43 | #define NULLGROUP 65534 |
| 44 | |
| 45 | struct umap_args { |
| 46 | struct layer_args la; /* generic layerfs args. Includes |
| 47 | * target and export info */ |
| 48 | #define umap_target la.target |
| 49 | #define umap_export la.export |
| 50 | int nentries; /* # of entries in user map array */ |
| 51 | int gnentries; /* # of entries in group map array */ |
| 52 | u_long (*mapdata)[2]; /* pointer to array of user mappings */ |
| 53 | u_long (*gmapdata)[2]; /* pointer to array of group mappings */ |
| 54 | }; |
| 55 | |
| 56 | #ifdef _KERNEL |
| 57 | |
| 58 | struct umap_mount { |
| 59 | struct layer_mount lm; |
| 60 | int info_nentries; /* number of uid mappings */ |
| 61 | int info_gnentries; /* number of gid mappings */ |
| 62 | u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for |
| 63 | user mapping in ficus */ |
| 64 | u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for |
| 65 | group mapping in ficus */ |
| 66 | }; |
| 67 | #define umapm_vfs lm.layerm_vfs |
| 68 | #define umapm_rootvp lm.layerm_rootvp |
| 69 | #define umapm_export lm.layerm_export |
| 70 | #define umapm_flags lm.layerm_flags |
| 71 | #define umapm_size lm.layerm_size |
| 72 | #define umapm_tag lm.layerm_tag |
| 73 | #define umapm_bypass lm.layerm_bypass |
| 74 | #define umapm_alloc lm.layerm_alloc |
| 75 | #define umapm_vnodeop_p lm.layerm_vnodeop_p |
| 76 | #define umapm_node_hashtbl lm.layerm_node_hashtbl |
| 77 | #define umapm_node_hash lm.layerm_node_hash |
| 78 | #define umapm_hashlock lm.layerm_hashlock |
| 79 | |
| 80 | /* |
| 81 | * A cache of vnode references |
| 82 | */ |
| 83 | struct umap_node { |
| 84 | struct layer_node ln; |
| 85 | }; |
| 86 | |
| 87 | u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries); |
| 88 | void umap_mapids(struct mount *v_mount, kauth_cred_t credp); |
| 89 | |
| 90 | #define umap_hash ln.layer_hash |
| 91 | #define umap_lowervp ln.layer_lowervp |
| 92 | #define umap_vnode ln.layer_vnode |
| 93 | #define umap_flags ln.layer_flags |
| 94 | |
| 95 | #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data)) |
| 96 | #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data) |
| 97 | #define UMAPTOV(xp) ((xp)->umap_vnode) |
| 98 | #ifdef UMAPFS_DIAGNOSTIC |
| 99 | #define UMAPVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__) |
| 100 | #else |
| 101 | #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp) |
| 102 | #endif |
| 103 | |
| 104 | extern int (**umap_vnodeop_p)(void *); |
| 105 | extern struct vfsops umapfs_vfsops; |
| 106 | |
| 107 | int umap_bypass(void *); |
| 108 | |
| 109 | #define NUMAPNODECACHE 16 |
| 110 | |
| 111 | #endif /* _KERNEL */ |
| 112 | |