FreeBSD/Linux Kernel Cross Reference
sys/ufs/mfs/mfsnode.h

     /*      $OpenBSD: mfsnode.h,v 1.15 2016/11/07 00:26:33 guenther Exp $   */
     /*      $NetBSD: mfsnode.h,v 1.3 1996/02/09 22:31:31 christos Exp $     */
     
     /*
      * Copyright (c) 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * 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 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.
     *
     *      @(#)mfsnode.h   8.2 (Berkeley) 8/11/93
     */
    
    /*
     * This structure defines the control data for the memory based file system.
     */
    
    struct mfsnode {
            struct vnode *mfs_vnode;        /* vnode associated with this mfsnode */
            struct bufq mfs_bufq;           /* bufq for MFS I/O */
            caddr_t mfs_baseoff;            /* base of file system in memory */
            long    mfs_size;               /* size of memory file system */
            pid_t   mfs_tid;                /* supporting thread's tid */
            struct  buf *mfs_buflist;       /* list of I/O requests */
            int     mfs_shutdown;           /* shutdown request */
    };
    
    /*
     * Convert between mfsnode pointers and vnode pointers
     */
    #define VTOMFS(vp)      ((struct mfsnode *)(vp)->v_data)
    #define MFSTOV(mfsp)    ((mfsp)->mfs_vnode)

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