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

     /*      $NetBSD: mfsnode.h,v 1.14 2003/08/07 16:34:41 agc 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   8.3 (Berkeley) 5/19/95
     */
    
    #ifndef _UFS_MFS_MFSNODE_H_
    #define _UFS_MFS_MFSNODE_H_
    
    /*
     * This structure defines the control data for the memory based file system.
     */
    
    struct mfsnode {
            struct  vnode *mfs_vnode;       /* vnode associated with this mfsnode */
            caddr_t mfs_baseoff;            /* base of file system in memory */
            long    mfs_size;               /* size of memory file system */
            struct  proc *mfs_proc;         /* supporting process */
            struct  bufq_state mfs_buflist; /* list of I/O requests */
            int     mfs_shutdown;           /* shutdown this mfsnode */
    };
    
    /*
     * Convert between mfsnode pointers and vnode pointers
     */
    #define VTOMFS(vp)      ((struct mfsnode *)(vp)->v_data)
    #define MFSTOV(mfsp)    ((mfsp)->mfs_vnode)
    
    /* Prototypes for MFS operations on vnodes. */
    #define mfs_lookup      genfs_badop
    #define mfs_create      genfs_badop
    #define mfs_mknod       genfs_badop
    #define mfs_access      genfs_badop
    #define mfs_getattr     genfs_badop
    #define mfs_setattr     genfs_badop
    #define mfs_read        genfs_badop
    #define mfs_write       genfs_badop
    #define mfs_poll        genfs_badop
    #define mfs_mmap        genfs_badop
    #define mfs_seek        genfs_badop
    #define mfs_remove      genfs_badop
    #define mfs_link        genfs_badop
    #define mfs_rename      genfs_badop
    #define mfs_mkdir       genfs_badop
    #define mfs_rmdir       genfs_badop
    #define mfs_symlink     genfs_badop
    #define mfs_readdir     genfs_badop
    #define mfs_readlink    genfs_badop
    #define mfs_abortop     genfs_badop
    #define mfs_lock        genfs_nolock
    #define mfs_unlock      genfs_nounlock
    #define mfs_islocked    genfs_noislocked
    #define mfs_pathconf    genfs_badop
    #define mfs_advlock     genfs_badop
    #define mfs_blkatoff    genfs_badop
    #define mfs_valloc      genfs_badop
    #define mfs_vfree       genfs_badop
    #define mfs_truncate    genfs_badop
    #define mfs_update      genfs_badop
    #define mfs_bwrite      vn_bwrite
    #define mfs_revoke      genfs_revoke
    #define mfs_putpages    genfs_null_putpages
    
    #endif /* !_UFS_MFS_MFSNODE_H_ */

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