/* * Copyright (c) 1989 The Regents of the University of California. * All rights reserved. * * Redistribution is only permitted until one year after the first shipment * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and * binary forms are permitted provided that: (1) source distributions retain * this entire copyright notice and comment, and (2) distributions including * binaries display the following acknowledgement: This product includes * software developed by the University of California, Berkeley and its * contributors'' in the documentation or other materials provided with the * distribution and in all advertising materials mentioning features or use * of this software. 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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * @(#)mfsnode.h 7.2 (Berkeley) 6/28/90 */ /* * This structure defines the control data for the memory * based file system. */ struct mfsnode { struct vnode *mfs_vnode; /* vnode associated with this mfsnode */ caddr_t mfs_baseoff; /* base of file system in memory */ long mfs_size; /* size of memory file system */ pid_t mfs_pid; /* supporting process pid */ struct buf *mfs_buflist; /* list of I/O requests */ long mfs_spare[4]; }; /* * Convert between mfsnode pointers and vnode pointers */ #define VTOMFS(vp) ((struct mfsnode *)(vp)->v_data) #define MFSTOV(mfsp) ((mfsp)->mfs_vnode)