129 lines
5.3 KiB
C
129 lines
5.3 KiB
C
/* $NetBSD: null.h,v 1.11 2000/03/13 23:52:40 soren Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1999 National Aeronautics & Space Administration
|
|
* All rights reserved.
|
|
*
|
|
* This software was written by William Studnemund of the
|
|
* Numerical Aerospace Similation Facility, NASA Ames Research Center.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the National Aeronautics & Space Administration
|
|
* nor the names of its contributors may be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB-
|
|
* UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software donated to Berkeley by
|
|
* Jan-Simon Pendry.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: Id: lofs.h,v 1.8 1992/05/30 10:05:43 jsp Exp
|
|
* @(#)null.h 8.2 (Berkeley) 1/21/94
|
|
*/
|
|
|
|
#include <miscfs/genfs/layer.h>
|
|
|
|
struct null_args {
|
|
struct layer_args la; /* generic layerfs args */
|
|
};
|
|
#define nulla_target la.target
|
|
#define nulla_export la.export
|
|
|
|
#ifdef _KERNEL
|
|
struct null_mount {
|
|
struct layer_mount lm; /* generic layerfs mount stuff */
|
|
};
|
|
#define nullm_vfs lm.layerm_vfs
|
|
#define nullm_rootvp lm.layerm_rootvp
|
|
#define nullm_export lm.layerm_export
|
|
#define nullm_flags lm.layerm_flags
|
|
#define nullm_size lm.layerm_size
|
|
#define nullm_tag lm.layerm_tag
|
|
#define nullm_bypass lm.layerm_bypass
|
|
#define nullm_alloc lm.layerm_alloc
|
|
#define nullm_vnodeop_p lm.layerm_vnodeop_p
|
|
#define nullm_node_hashtbl lm.layerm_node_hashtbl
|
|
#define nullm_node_hash lm.layerm_node_hash
|
|
#define nullm_hashlock lm.layerm_hashlock
|
|
|
|
/*
|
|
* A cache of vnode references
|
|
*/
|
|
struct null_node {
|
|
struct layer_node ln;
|
|
};
|
|
#define null_hash ln.layer_hash
|
|
#define null_lowervp ln.layer_lowervp
|
|
#define null_vnode ln.layer_vnode
|
|
#define null_flags ln.layer_flags
|
|
|
|
int null_node_create __P((struct mount *mp, struct vnode *target, struct vnode **vpp));
|
|
|
|
#define MOUNTTONULLMOUNT(mp) ((struct null_mount *)((mp)->mnt_data))
|
|
#define VTONULL(vp) ((struct null_node *)(vp)->v_data)
|
|
#define NULLTOV(xp) ((xp)->null_vnode)
|
|
#ifdef NULLFS_DIAGNOSTIC
|
|
extern struct vnode *layer_checkvp __P((struct vnode *vp, char *fil, int lno));
|
|
#define NULLVPTOLOWERVP(vp) layer_checkvp((vp), __FILE__, __LINE__)
|
|
#else
|
|
#define NULLVPTOLOWERVP(vp) (VTONULL(vp)->null_lowervp)
|
|
#endif
|
|
|
|
extern int (**null_vnodeop_p) __P((void *));
|
|
extern struct vfsops nullfs_vfsops;
|
|
|
|
void nullfs_init __P((void));
|
|
|
|
#endif /* _KERNEL */
|