usr/src/sys/deprecated/lofs/lofs.h

/*
 * Copyright (c) 1992 The Regents of the University of California
 * Copyright (c) 1990, 1992 Jan-Simon Pendry
 * All rights reserved.
 *
 * This code is derived from software donated to Berkeley by
 * Jan-Simon Pendry.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)lofs.h      1.1 (Berkeley) %G%
 *
 * $Id: lofs.h,v 1.8 1992/05/30 10:05:43 jsp Exp jsp $
 */

struct lofs_args {
        char            *target;        /* Target of loopback  */
};

struct lofsmount {
        struct mount    *looped_vfs;
        struct vnode    *rootvp;        /* Reference to root lofsnode */
};

#ifdef KERNEL
/*
 * A cache of vnode references
 */
struct lofsnode {
        struct lofsnode *a_forw;        /* Hash chain */
        struct lofsnode *a_back;
        struct vnode    *a_lofsvp;      /* Aliased vnode - VREFed once */
        struct vnode    *a_vnode;       /* Back pointer to vnode/lofsnode */
};

extern int make_lofs __P((struct mount *mp, struct vnode **vpp));

#define VFSTOLOFS(mp) ((struct lofsmount *)((mp)->mnt_data))
#define LOFSP(vp) ((struct lofsnode *)(vp)->v_data)
#ifdef LOFS_DIAGNOSTIC
extern struct vnode *lofs_checkvp __P((struct vnode *vp, char *fil, int lno));
#define LOFSVP(vp) lofs_checkvp(vp, __FILE__, __LINE__)
#else
#define LOFSVP(vp) (LOFSP(vp)->a_lofsvp)
#endif

extern int (**lofs_vnodeop_p)();
extern struct vfsops lofs_vfsops;
#endif /* KERNEL */