sys/vfs/mfs/mfsnode.h

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)mfsnode.h   8.3 (Berkeley) 5/19/95
  30  * $FreeBSD: src/sys/ufs/mfs/mfsnode.h,v 1.12.2.2 2001/07/04 17:35:21 tegge Exp $
  31  * $DragonFly: src/sys/vfs/mfs/mfsnode.h,v 1.6 2006/09/10 01:26:41 dillon Exp $
  32  */
  33
  34 #ifndef _UFS_MFS_MFSNODE_H_
  35 #define _UFS_MFS_MFSNODE_H_
  36
  37 /*
  38  * This structure defines the control data for the memory based file system.
  39  */
  40
  41 struct mfsnode {
  42         caddr_t mfs_baseoff;            /* base of file system in memory */
  43         long    mfs_size;               /* size of memory file system */
  44         struct thread *mfs_td;          /* supporting thread */
  45         struct bio_queue_head bio_queue; /* list of I/O requests */
  46         cdev_t  mfs_dev;                /* underlying device */
  47         int     mfs_active;
  48         long    mfs_spare[1];
  49 };
  50
  51 #ifdef MALLOC_DECLARE
  52 MALLOC_DECLARE(M_MFSNODE);
  53 #endif
  54
  55 #endif