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Annotation of 43BSDReno/sys/ufs/mfsnode.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1989 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution is only permitted until one year after the first shipment
                      6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
                      7:  * binary forms are permitted provided that: (1) source distributions retain
                      8:  * this entire copyright notice and comment, and (2) distributions including
                      9:  * binaries display the following acknowledgement:  This product includes
                     10:  * software developed by the University of California, Berkeley and its
                     11:  * contributors'' in the documentation or other materials provided with the
                     12:  * distribution and in all advertising materials mentioning features or use
                     13:  * of this software.  Neither the name of the University nor the names of
                     14:  * its contributors may be used to endorse or promote products derived from
                     15:  * this software without specific prior written permission.
                     16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     19:  *
                     20:  *     @(#)mfsnode.h   7.2 (Berkeley) 6/28/90
                     21:  */
                     22: 
                     23: /*
                     24:  * This structure defines the control data for the memory
                     25:  * based file system.
                     26:  */
                     27: 
                     28: struct mfsnode {
                     29:        struct  vnode *mfs_vnode;       /* vnode associated with this mfsnode */
                     30:        caddr_t mfs_baseoff;            /* base of file system in memory */
                     31:        long    mfs_size;               /* size of memory file system */
                     32:        pid_t   mfs_pid;                /* supporting process pid */
                     33:        struct  buf *mfs_buflist;       /* list of I/O requests */
                     34:        long    mfs_spare[4];
                     35: };
                     36: 
                     37: /*
                     38:  * Convert between mfsnode pointers and vnode pointers
                     39:  */
                     40: #define VTOMFS(vp)     ((struct mfsnode *)(vp)->v_data)
                     41: #define MFSTOV(mfsp)   ((mfsp)->mfs_vnode)

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