minix/sys/ufs/mfs/mfsnode.h

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2011-12-22 17:54:36 +01:00
/* $NetBSD: mfsnode.h,v 1.21 2008/03/26 14:19:43 ad 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 */
void *mfs_baseoff; /* base of file system in memory */
long mfs_size; /* size of memory file system */
struct proc *mfs_proc; /* supporting process */
int mfs_shutdown; /* shutdown this mfsnode */
#if defined(_KERNEL)
kcondvar_t mfs_cv; /* notifier */
int mfs_refcnt; /* number of references */
struct bufq_state *mfs_buflist;/* list of I/O requests */
#endif /* defined(_KERNEL) */
};
#if defined(_KERNEL)
/*
* 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_islocked genfs_noislocked
#define mfs_pathconf genfs_badop
#define mfs_advlock genfs_badop
#define mfs_bwrite vn_bwrite
#define mfs_revoke genfs_revoke
#define mfs_putpages genfs_null_putpages
#endif /* defined(_KERNEL) */
#endif /* !_UFS_MFS_MFSNODE_H_ */