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umap.h revision 1.15.66.1
      1  1.15.66.1    simonb /*	$NetBSD: umap.h,v 1.15.66.1 2008/07/03 18:38:18 simonb Exp $	*/
      2        1.2       cgd 
      3        1.1   mycroft /*
      4        1.1   mycroft  * Copyright (c) 1992, 1993
      5        1.1   mycroft  *	The Regents of the University of California.  All rights reserved.
      6        1.1   mycroft  *
      7        1.1   mycroft  * This code is derived from software donated to Berkeley by
      8        1.1   mycroft  * the UCLA Ficus project.
      9        1.1   mycroft  *
     10        1.1   mycroft  * Redistribution and use in source and binary forms, with or without
     11        1.1   mycroft  * modification, are permitted provided that the following conditions
     12        1.1   mycroft  * are met:
     13        1.1   mycroft  * 1. Redistributions of source code must retain the above copyright
     14        1.1   mycroft  *    notice, this list of conditions and the following disclaimer.
     15        1.1   mycroft  * 2. Redistributions in binary form must reproduce the above copyright
     16        1.1   mycroft  *    notice, this list of conditions and the following disclaimer in the
     17        1.1   mycroft  *    documentation and/or other materials provided with the distribution.
     18       1.10       agc  * 3. Neither the name of the University nor the names of its contributors
     19        1.1   mycroft  *    may be used to endorse or promote products derived from this software
     20        1.1   mycroft  *    without specific prior written permission.
     21        1.1   mycroft  *
     22        1.1   mycroft  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23        1.1   mycroft  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24        1.1   mycroft  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25        1.1   mycroft  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26        1.1   mycroft  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27        1.1   mycroft  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28        1.1   mycroft  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29        1.1   mycroft  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30        1.1   mycroft  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31        1.1   mycroft  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32        1.1   mycroft  * SUCH DAMAGE.
     33        1.1   mycroft  *
     34        1.1   mycroft  *	from: @(#)null_vnops.c       1.5 (Berkeley) 7/10/92
     35        1.8      fvdl  *	@(#)umap.h	8.4 (Berkeley) 8/20/94
     36        1.1   mycroft  */
     37        1.1   mycroft 
     38        1.9  wrstuden #include <miscfs/genfs/layer.h>
     39        1.9  wrstuden 
     40        1.1   mycroft #define MAPFILEENTRIES 64
     41        1.1   mycroft #define GMAPFILEENTRIES 16
     42        1.1   mycroft #define NOBODY 32767
     43        1.1   mycroft #define NULLGROUP 65534
     44        1.1   mycroft 
     45        1.1   mycroft struct umap_args {
     46        1.9  wrstuden 	struct layer_args la;		/* generic layerfs args. Includes
     47        1.9  wrstuden 					 * target and export info */
     48        1.9  wrstuden #define	umap_target	la.target
     49        1.9  wrstuden #define	umap_export	la.export
     50        1.1   mycroft 	int 		nentries;       /* # of entries in user map array */
     51        1.1   mycroft 	int 		gnentries;	/* # of entries in group map array */
     52        1.5       cgd 	u_long 		(*mapdata)[2];	/* pointer to array of user mappings */
     53        1.5       cgd 	u_long 		(*gmapdata)[2];	/* pointer to array of group mappings */
     54        1.1   mycroft };
     55        1.1   mycroft 
     56        1.9  wrstuden #ifdef _KERNEL
     57        1.9  wrstuden 
     58        1.1   mycroft struct umap_mount {
     59       1.12     perry 	struct layer_mount lm;
     60        1.1   mycroft 	int             info_nentries;  /* number of uid mappings */
     61        1.1   mycroft 	int		info_gnentries;	/* number of gid mappings */
     62       1.12     perry 	u_long		info_mapdata[MAPFILEENTRIES][2]; /* mapping data for
     63        1.1   mycroft 	    user mapping in ficus */
     64       1.12     perry 	u_long		info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for
     65        1.1   mycroft 	    group mapping in ficus */
     66        1.1   mycroft };
     67        1.9  wrstuden #define	umapm_vfs		lm.layerm_vfs
     68        1.9  wrstuden #define	umapm_rootvp		lm.layerm_rootvp
     69        1.9  wrstuden #define	umapm_export		lm.layerm_export
     70        1.9  wrstuden #define	umapm_flags		lm.layerm_flags
     71        1.9  wrstuden #define	umapm_size		lm.layerm_size
     72        1.9  wrstuden #define	umapm_tag		lm.layerm_tag
     73        1.9  wrstuden #define	umapm_bypass		lm.layerm_bypass
     74        1.9  wrstuden #define	umapm_alloc		lm.layerm_alloc
     75        1.9  wrstuden #define	umapm_vnodeop_p		lm.layerm_vnodeop_p
     76        1.9  wrstuden #define	umapm_node_hashtbl	lm.layerm_node_hashtbl
     77        1.9  wrstuden #define	umapm_node_hash		lm.layerm_node_hash
     78        1.9  wrstuden #define	umapm_hashlock		lm.layerm_hashlock
     79        1.1   mycroft 
     80        1.1   mycroft /*
     81        1.1   mycroft  * A cache of vnode references
     82        1.1   mycroft  */
     83        1.1   mycroft struct umap_node {
     84        1.9  wrstuden 	struct	layer_node	ln;
     85        1.1   mycroft };
     86        1.1   mycroft 
     87       1.13   xtraeme u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries);
     88       1.15      elad void umap_mapids(struct mount *v_mount, kauth_cred_t credp);
     89        1.9  wrstuden 
     90        1.9  wrstuden #define	umap_hash	ln.layer_hash
     91        1.9  wrstuden #define	umap_lowervp	ln.layer_lowervp
     92        1.9  wrstuden #define	umap_vnode	ln.layer_vnode
     93        1.9  wrstuden #define	umap_flags	ln.layer_flags
     94        1.1   mycroft 
     95        1.1   mycroft #define	MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data))
     96        1.1   mycroft #define	VTOUMAP(vp) ((struct umap_node *)(vp)->v_data)
     97        1.1   mycroft #define UMAPTOV(xp) ((xp)->umap_vnode)
     98        1.1   mycroft #ifdef UMAPFS_DIAGNOSTIC
     99        1.9  wrstuden #define	UMAPVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__)
    100        1.1   mycroft #else
    101        1.1   mycroft #define	UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp)
    102        1.1   mycroft #endif
    103        1.1   mycroft 
    104       1.13   xtraeme extern int (**umap_vnodeop_p)(void *);
    105        1.7   thorpej extern struct vfsops umapfs_vfsops;
    106        1.6  christos 
    107       1.13   xtraeme int     umap_bypass(void *);
    108        1.9  wrstuden 
    109        1.9  wrstuden #define NUMAPNODECACHE	16
    110        1.6  christos 
    111        1.4    briggs #endif /* _KERNEL */
    112