1*54750Sjohnh /* 2*54750Sjohnh * Copyright (c) 1992 The Regents of the University of California 3*54750Sjohnh * Copyright (c) 1990, 1992 Jan-Simon Pendry 4*54750Sjohnh * All rights reserved. 5*54750Sjohnh * 6*54750Sjohnh * This code is derived from software donated to Berkeley by 7*54750Sjohnh * Jan-Simon Pendry. 8*54750Sjohnh * 9*54750Sjohnh * %sccs.include.redist.c% 10*54750Sjohnh * 11*54750Sjohnh * @(#)lofs.h 1.1 (Berkeley) 6/3/92 12*54750Sjohnh * 13*54750Sjohnh * $Id: lofs.h,v 1.8 1992/05/30 10:05:43 jsp Exp jsp $ 14*54750Sjohnh */ 15*54750Sjohnh 16*54750Sjohnh struct lofs_args { 17*54750Sjohnh char *target; /* Target of loopback */ 18*54750Sjohnh }; 19*54750Sjohnh 20*54750Sjohnh struct lofsmount { 21*54750Sjohnh struct mount *looped_vfs; 22*54750Sjohnh struct vnode *rootvp; /* Reference to root lofsnode */ 23*54750Sjohnh }; 24*54750Sjohnh 25*54750Sjohnh #ifdef KERNEL 26*54750Sjohnh /* 27*54750Sjohnh * A cache of vnode references 28*54750Sjohnh */ 29*54750Sjohnh struct lofsnode { 30*54750Sjohnh struct lofsnode *a_forw; /* Hash chain */ 31*54750Sjohnh struct lofsnode *a_back; 32*54750Sjohnh struct vnode *a_lofsvp; /* Aliased vnode - VREFed once */ 33*54750Sjohnh struct vnode *a_vnode; /* Back pointer to vnode/lofsnode */ 34*54750Sjohnh }; 35*54750Sjohnh 36*54750Sjohnh extern int make_lofs __P((struct mount *mp, struct vnode **vpp)); 37*54750Sjohnh 38*54750Sjohnh #define VFSTOLOFS(mp) ((struct lofsmount *)((mp)->mnt_data)) 39*54750Sjohnh #define LOFSP(vp) ((struct lofsnode *)(vp)->v_data) 40*54750Sjohnh #ifdef LOFS_DIAGNOSTIC 41*54750Sjohnh extern struct vnode *lofs_checkvp __P((struct vnode *vp, char *fil, int lno)); 42*54750Sjohnh #define LOFSVP(vp) lofs_checkvp(vp, __FILE__, __LINE__) 43*54750Sjohnh #else 44*54750Sjohnh #define LOFSVP(vp) (LOFSP(vp)->a_lofsvp) 45*54750Sjohnh #endif 46*54750Sjohnh 47*54750Sjohnh extern int (**lofs_vnodeop_p)(); 48*54750Sjohnh extern struct vfsops lofs_vfsops; 49*54750Sjohnh #endif /* KERNEL */ 50