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65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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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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* @(#)mfsnode.h 8.3 (Berkeley) 5/19/95
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* $FreeBSD$
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*/
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#ifndef _UFS_MFS_MFSNODE_H_
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#define _UFS_MFS_MFSNODE_H_
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/*
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* This structure defines the control data for the memory based file system.
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*/
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struct mfsnode {
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struct vnode *mfs_vnode; /* vnode associated with this mfsnode */
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caddr_t mfs_baseoff; /* base of file system in memory */
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long mfs_size; /* size of memory file system */
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pid_t mfs_pid; /* supporting process pid */
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struct buf_queue_head buf_queue; /* list of I/O requests */
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int mfs_active;
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long mfs_spare[1];
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};
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/*
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* Convert between mfsnode pointers and vnode pointers
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*/
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#define VTOMFS(vp) ((struct mfsnode *)(vp)->v_data)
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#define MFSTOV(mfsp) ((mfsp)->mfs_vnode)
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_MFSNODE);
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#endif
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#endif
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