1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)mfsnode.h 7.1 (Berkeley) 10/24/89 18 */ 19 20 /* 21 * This structure defines the control data for the memory 22 * based file system. 23 */ 24 25 struct mfsnode { 26 struct vnode *mfs_vnode; /* vnode associated with this mfsnode */ 27 caddr_t mfs_baseoff; /* base of file system in memory */ 28 long mfs_size; /* size of memory file system */ 29 pid_t mfs_pid; /* supporting process pid */ 30 struct buf *mfs_buflist; /* list of I/O requests */ 31 long mfs_spare[4]; 32 }; 33 34 /* 35 * Convert between mfsnode pointers and vnode pointers 36 */ 37 #define VTOMFS(vp) ((struct mfsnode *)(vp)->v_data) 38 #define MFSTOV(mfsp) ((mfsp)->mfs_vnode) 39