1 /* $NetBSD: mfsnode.h,v 1.22 2021/07/18 23:57:15 dholland 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 #endif /* defined(_KERNEL) */ 62 63 #endif /* !_UFS_MFS_MFSNODE_H_ */ 64