d53e4c1d80
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
77 lines
3.0 KiB
C
77 lines
3.0 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* @(#)null.h 8.3 (Berkeley) 8/20/94
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*
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* $FreeBSD$
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*/
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struct null_args {
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char *target; /* Target of loopback */
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};
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struct null_mount {
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struct mount *nullm_vfs;
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struct vnode *nullm_rootvp; /* Reference to root null_node */
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};
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#ifdef _KERNEL
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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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LIST_ENTRY(null_node) null_hash; /* Hash list */
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struct vnode *null_lowervp; /* VREFed once */
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struct vnode *null_vnode; /* Back pointer */
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};
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extern int nullfs_init __P((struct vfsconf *vfsp));
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extern int null_node_create __P((struct mount *mp, struct vnode *target, struct vnode **vpp));
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#define MOUNTTONULLMOUNT(mp) ((struct null_mount *)((mp)->mnt_data))
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#define VTONULL(vp) ((struct null_node *)(vp)->v_data)
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#define NULLTOV(xp) ((xp)->null_vnode)
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#ifdef DIAGNOSTIC
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extern struct vnode *null_checkvp __P((struct vnode *vp, char *fil, int lno));
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#define NULLVPTOLOWERVP(vp) null_checkvp((vp), __FILE__, __LINE__)
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#else
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#define NULLVPTOLOWERVP(vp) (VTONULL(vp)->null_lowervp)
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#endif
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extern int null_bypass __P((struct vop_generic_args *ap));
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extern vop_t **null_vnodeop_p;
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#endif /* _KERNEL */
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