9727219460
the reality (remove duplicate one in nullfs, merge some differences from it), KNF, improve and update some comments, add few KASSERT()s, remove unused declarations, avoid double inclusion of headers, misc. No functional changes.
119 lines
4.7 KiB
C
119 lines
4.7 KiB
C
/* $NetBSD: null.h,v 1.19 2010/07/02 03:16:01 rmind Exp $ */
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/*
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* Copyright (c) 1999 National Aeronautics & Space Administration
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* All rights reserved.
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*
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* This software was written by William Studenmund of the
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* Numerical Aerospace Simulation Facility, NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the National Aeronautics & Space Administration
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* nor the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB-
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* UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Id: lofs.h,v 1.8 1992/05/30 10:05:43 jsp Exp
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* @(#)null.h 8.2 (Berkeley) 1/21/94
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*/
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#ifndef _MISCFS_NULLFS_H_
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#define _MISCFS_NULLFS_H_
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#include <miscfs/genfs/layer.h>
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struct null_args {
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struct layer_args la; /* generic layerfs args */
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};
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#define nulla_target la.target
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#define nulla_export la.export
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#ifdef _KERNEL
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struct null_mount {
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struct layer_mount lm; /* generic layerfs mount stuff */
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};
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#define nullm_vfs lm.layerm_vfs
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#define nullm_rootvp lm.layerm_rootvp
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#define nullm_export lm.layerm_export
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#define nullm_flags lm.layerm_flags
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#define nullm_size lm.layerm_size
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#define nullm_tag lm.layerm_tag
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#define nullm_bypass lm.layerm_bypass
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#define nullm_alloc lm.layerm_alloc
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#define nullm_vnodeop_p lm.layerm_vnodeop_p
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#define nullm_node_hashtbl lm.layerm_node_hashtbl
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#define nullm_node_hash lm.layerm_node_hash
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#define nullm_hashlock lm.layerm_hashlock
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/*
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* A cache of vnode references
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*/
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struct null_node {
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struct layer_node ln;
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};
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#define null_hash ln.layer_hash
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#define null_lowervp ln.layer_lowervp
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#define null_vnode ln.layer_vnode
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#define null_flags ln.layer_flags
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#define MOUNTTONULLMOUNT(mp) ((struct null_mount *)((mp)->mnt_data))
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extern int (**null_vnodeop_p)(void *);
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extern struct vfsops nullfs_vfsops;
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void nullfs_init(void);
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#endif /* _KERNEL */
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#endif /* _MISCFS_NULLFS_H_ */
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