1/* $NetBSD: mfsnode.h,v 1.21 2008/03/26 14:19:43 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
41struct 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_ */
92