sys/ufs/mfs/mfsnode.h

   1 /*      $NetBSD: mfsnode.h,v 1.20 2008/02/21 14:10:57 ad Exp $  */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)mfsnode.h   8.3 (Berkeley) 5/19/95
  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         struct vnode *mfs_vnode;        /* vnode associated with this mfsnode */
  43         void    *mfs_baseoff;           /* base of file system in memory */
  44         long    mfs_size;               /* size of memory file system */
  45         struct proc *mfs_proc;          /* supporting process */
  46         int     mfs_shutdown;           /* shutdown this mfsnode */
  47 #if defined(_KERNEL)
  48         kcondvar_t mfs_cv;              /* notifier */
  49         int     mfs_refcnt;             /* number of references */
  50         struct  bufq_state *mfs_buflist;/* list of I/O requests */
  51 #endif /* defined(_KERNEL) */
  52 };
  53
  54 #if defined(_KERNEL)
  55 /*
  56  * Convert between mfsnode pointers and vnode pointers
  57  */
  58 #define VTOMFS(vp)      ((struct mfsnode *)(vp)->v_data)
  59 #define MFSTOV(mfsp)    ((mfsp)->mfs_vnode)
  60
  61 /* Prototypes for MFS operations on vnodes. */
  62 #define mfs_lookup      genfs_badop
  63 #define mfs_create      genfs_badop
  64 #define mfs_mknod       genfs_badop
  65 #define mfs_access      genfs_badop
  66 #define mfs_getattr     genfs_badop
  67 #define mfs_setattr     genfs_badop
  68 #define mfs_read        genfs_badop
  69 #define mfs_write       genfs_badop
  70 #define mfs_poll        genfs_badop
  71 #define mfs_mmap        genfs_badop
  72 #define mfs_seek        genfs_badop
  73 #define mfs_remove      genfs_badop
  74 #define mfs_link        genfs_badop
  75 #define mfs_rename      genfs_badop
  76 #define mfs_mkdir       genfs_badop
  77 #define mfs_rmdir       genfs_badop
  78 #define mfs_symlink     genfs_badop
  79 #define mfs_readdir     genfs_badop
  80 #define mfs_readlink    genfs_badop
  81 #define mfs_abortop     genfs_badop
  82 #define mfs_islocked    genfs_noislocked
  83 #define mfs_pathconf    genfs_badop
  84 #define mfs_advlock     genfs_badop
  85 #define mfs_bwrite      vn_bwrite
  86 #define mfs_revoke      genfs_revoke
  87 #define mfs_putpages    genfs_null_putpages
  88
  89 #endif /* defined(_KERNEL) */
  90
  91 #endif /* !_UFS_MFS_MFSNODE_H_ */