[unix-history] / usr / src / sys / ufs / mfs / mfsnode.h

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not 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	7.1 (Berkeley) %G%
 */

/*
 * 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)
Commit	Line	Data
0dc98f87 KM	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) %G%
	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)