1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * All rights reserved. 5 * 6 * This code is derived from software donated to Berkeley by 7 * the UCLA Ficus project. 8 * 9 * %sccs.include.redist.c% 10 * 11 * @(#)umap.h 8.2 (Berkeley) 01/05/94 12 * 13 * @(#)null_vnops.c 1.5 (Berkeley) 7/10/92 14 */ 15 16 #define MAPFILEENTRIES 64 17 #define GMAPFILEENTRIES 16 18 #define NOBODY 32767 19 #define NULLGROUP 65534 20 21 struct umap_args { 22 char *target; /* Target of loopback */ 23 int nentries; /* # of entries in user map array */ 24 int gnentries; /* # of entries in group map array */ 25 u_long (*mapdata)[2]; /* pointer to array of user mappings */ 26 u_long (*gmapdata)[2]; /* pointer to array of group mappings */ 27 }; 28 29 struct umap_mount { 30 struct mount *umapm_vfs; 31 struct vnode *umapm_rootvp; /* Reference to root umap_node */ 32 int info_nentries; /* number of uid mappings */ 33 int info_gnentries; /* number of gid mappings */ 34 u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for 35 user mapping in ficus */ 36 u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for 37 group mapping in ficus */ 38 }; 39 40 #ifdef KERNEL 41 /* 42 * A cache of vnode references 43 */ 44 struct umap_node { 45 struct umap_node *umap_forw; /* Hash chain */ 46 struct umap_node *umap_back; 47 struct vnode *umap_lowervp; /* Aliased vnode - VREFed once */ 48 struct vnode *umap_vnode; /* Back pointer to vnode/umap_node */ 49 }; 50 51 extern int umap_node_create __P((struct mount *mp, struct vnode *target, struct vnode **vpp)); 52 extern u_long umap_reverse_findid __P((u_long id, u_long map[][2], int nentries)); 53 extern void umap_mapids __P((struct mount *v_mount, struct ucred *credp)); 54 55 #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data)) 56 #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data) 57 #define UMAPTOV(xp) ((xp)->umap_vnode) 58 #ifdef UMAPFS_DIAGNOSTIC 59 extern struct vnode *umap_checkvp __P((struct vnode *vp, char *fil, int lno)); 60 #define UMAPVPTOLOWERVP(vp) umap_checkvp((vp), __FILE__, __LINE__) 61 #else 62 #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp) 63 #endif 64 65 extern int (**umap_vnodeop_p)(); 66 extern struct vfsops umap_vfsops; 67 #endif /* KERNEL */ 68