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