1 /* $OpenBSD: mfsnode.h,v 1.15 2016/11/07 00:26:33 guenther Exp $ */ 2 /* $NetBSD: mfsnode.h,v 1.3 1996/02/09 22:31:31 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)mfsnode.h 8.2 (Berkeley) 8/11/93 33 */ 34 35 /* 36 * This structure defines the control data for the memory based file system. 37 */ 38 39 struct mfsnode { 40 struct vnode *mfs_vnode; /* vnode associated with this mfsnode */ 41 struct bufq mfs_bufq; /* bufq for MFS I/O */ 42 caddr_t mfs_baseoff; /* base of file system in memory */ 43 long mfs_size; /* size of memory file system */ 44 pid_t mfs_tid; /* supporting thread's tid */ 45 struct buf *mfs_buflist; /* list of I/O requests */ 46 int mfs_shutdown; /* shutdown request */ 47 }; 48 49 /* 50 * Convert between mfsnode pointers and vnode pointers 51 */ 52 #define VTOMFS(vp) ((struct mfsnode *)(vp)->v_data) 53 #define MFSTOV(mfsp) ((mfsp)->mfs_vnode) 54