#
# Copyright (c) 1992, 1993
#	The Regents of the University of California.  All rights reserved.
#
# %sccs.include.redist.sh%
#
#	@(#)vnode_if.src	8.7 (Berkeley) 08/10/94
#

#
# Above each of the vop descriptors is a specification of the locking
# protocol used by each vop call.  The first column is the name of
# the variable, the remaining three columns are in, out and error
# respectively.  The "in" column defines the lock state on input,
# the "out" column defines the state on succesful return, and the
# "error" column defines the locking state on error exit.
#
# The locking value can take the following values:
# L: locked.
# U: unlocked/
# -: not applicable.  vnode does not yet (or no longer) exists.
# =: the same on input and output, may be either L or U.
# X: locked if not nil.
#

#
#% lookup	dvp	L ? ?
#% lookup	vpp	- L -
#
# XXX - the lookup locking protocol defies simple description and depends
#       on the flags and operation fields in the (cnp) structure.  Note
#       especially that *vpp may equal dvp and both may be locked.
#
vop_lookup {
	IN struct vnode *dvp;
	INOUT struct vnode **vpp;
	IN struct componentname *cnp;
};

#
#% create	dvp	L U U
#% create	vpp	- L -
#
vop_create {
	IN WILLRELE struct vnode *dvp;
	OUT struct vnode **vpp;
	IN struct componentname *cnp;
	IN struct vattr *vap;
};

#
#% whiteout	dvp	L L L
#% whiteout	cnp	- - -
#% whiteout	flag	- - -
vop_whiteout {
	IN WILLRELE struct vnode *dvp;
	IN struct componentname *cnp;
	IN int flags;
};

#
#% mknod	dvp	L U U
#% mknod	vpp	- X -
#
vop_mknod {
	IN WILLRELE struct vnode *dvp;
	OUT WILLRELE struct vnode **vpp;
	IN struct componentname *cnp;
	IN struct vattr *vap;
};

#
#% open 	vp	L L L
#
vop_open {
	IN struct vnode *vp;
	IN int mode;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% close	vp	U U U
#
vop_close {
	IN struct vnode *vp;
	IN int fflag;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% access	vp	L L L
#
vop_access {
	IN struct vnode *vp;
	IN int mode;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% getattr	vp	= = =
#
vop_getattr {
	IN struct vnode *vp;
	IN struct vattr *vap;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% setattr	vp	L L L
#
vop_setattr {
	IN struct vnode *vp;
	IN struct vattr *vap;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% read 	vp	L L L
#
vop_read {
	IN struct vnode *vp;
	INOUT struct uio *uio;
	IN int ioflag;
	IN struct ucred *cred;
};

#
#% write	vp	L L L
#
vop_write {
	IN struct vnode *vp;
	INOUT struct uio *uio;
	IN int ioflag;
	IN struct ucred *cred;
};

#
#% lease	vp	= = =
#
vop_lease {
	IN struct vnode *vp;
	IN struct proc *p;
	IN struct ucred *cred;
	IN int flag;
};

#
#% ioctl	vp	U U U
#
vop_ioctl {
	IN struct vnode *vp;
	IN int command;
	IN caddr_t data;
	IN int fflag;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% select	vp	U U U
#
# Needs work?  (fflags)
vop_select {
	IN struct vnode *vp;
	IN int which;
	IN int fflags;
	IN struct ucred *cred;
	IN struct proc *p;
};

# XXX - not used
vop_mmap {
	IN struct vnode *vp;
	IN int fflags;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% fsync	vp	L L L
#
vop_fsync {
	IN struct vnode *vp;
	IN struct ucred *cred;
	IN int waitfor;
	IN struct proc *p;
};

# XXX - not used
# Needs word: Is newoff right?  What's it mean?
vop_seek {
	IN struct vnode *vp;
	IN off_t oldoff;
	IN off_t newoff;
	IN struct ucred *cred;
};

#
#% remove	dvp	L U U
#% remove	vp	L U U
#
vop_remove {
	IN WILLRELE struct vnode *dvp;
	IN WILLRELE struct vnode *vp;
	IN struct componentname *cnp;
};

#
#% link 	vp	L U U
#% link 	tdvp	U U U
#
vop_link {
	IN WILLRELE struct vnode *vp;
	IN struct vnode *tdvp;
	IN struct componentname *cnp;
};

#
#% rename	fdvp	U U U
#% rename	fvp	U U U
#% rename	tdvp	L U U
#% rename	tvp	X U U
#
vop_rename {
	IN WILLRELE struct vnode *fdvp;
	IN WILLRELE struct vnode *fvp;
	IN struct componentname *fcnp;
	IN WILLRELE struct vnode *tdvp;
	IN WILLRELE struct vnode *tvp;
	IN struct componentname *tcnp;
};

#
#% mkdir	dvp	L U U
#% mkdir	vpp	- L -
#
vop_mkdir {
	IN WILLRELE struct vnode *dvp;
	OUT struct vnode **vpp;
	IN struct componentname *cnp;
	IN struct vattr *vap;
};

#
#% rmdir	dvp	L U U
#% rmdir	vp	L U U
#
vop_rmdir {
	IN WILLRELE struct vnode *dvp;
	IN WILLRELE struct vnode *vp;
	IN struct componentname *cnp;
};

#
#% symlink	dvp	L U U
#% symlink	vpp	- U -
# XXX - note that the return vnode has already been VRELE'ed
#       by the filesystem layer.  To use it you must use vget,
#       possibly with a further namei.
#
vop_symlink {
	IN WILLRELE struct vnode *dvp;
	OUT WILLRELE struct vnode **vpp;
	IN struct componentname *cnp;
	IN struct vattr *vap;
	IN char *target;
};

#
#% readdir	vp	L L L
#
vop_readdir {
	IN struct vnode *vp;
	INOUT struct uio *uio;
	IN struct ucred *cred;
	INOUT int *eofflag;
	OUT u_long *cookies;
	IN int ncookies;
};

#
#% readlink	vp	L L L
#
vop_readlink {
	IN struct vnode *vp;
	INOUT struct uio *uio;
	IN struct ucred *cred;
};

#
#% abortop	dvp	= = =
#
vop_abortop {
	IN struct vnode *dvp;
	IN struct componentname *cnp;
};

#
#% inactive	vp	U U U
#
vop_inactive {
	IN struct vnode *vp;
};

#
#% reclaim	vp	U U U
#
vop_reclaim {
	IN struct vnode *vp;
};

#
#% lock 	vp	U L U
#
vop_lock {
	IN struct vnode *vp;
};

#
#% unlock	vp	L U L
#
vop_unlock {
	IN struct vnode *vp;
};

#
#% bmap 	vp	L L L
#% bmap 	vpp	- U -
#
vop_bmap {
	IN struct vnode *vp;
	IN daddr_t bn;
	OUT struct vnode **vpp;
	IN daddr_t *bnp;
	OUT int *runp;
};

#vop_strategy {
#	IN struct buf *bp;
#};

#
#% print	vp	= = =
#
vop_print {
	IN struct vnode *vp;
};

#
#% islocked	vp	= = =
#
vop_islocked {
	IN struct vnode *vp;
};

#
#% pathconf	vp	L L L
#
vop_pathconf {
	IN struct vnode *vp;
	IN int name;
	OUT int *retval;
};

#
#% advlock	vp	U U U
#
vop_advlock {
	IN struct vnode *vp;
	IN caddr_t id;
	IN int op;
	IN struct flock *fl;
	IN int flags;
};

#
#% blkatoff	vp	L L L
#
vop_blkatoff {
	IN struct vnode *vp;
	IN off_t offset;
	OUT char **res;
	OUT struct buf **bpp;
};

#
#% valloc	pvp	L L L
#
vop_valloc {
	IN struct vnode *pvp;
	IN int mode;
	IN struct ucred *cred;
	OUT struct vnode **vpp;
};

#
#% reallocblks	vp	L L L
#
vop_reallocblks {
	IN struct vnode *vp;
	IN struct cluster_save *buflist;
};

#
#% vfree	pvp	L L L
#
vop_vfree {
	IN struct vnode *pvp;
	IN ino_t ino;
	IN int mode;
};

#
#% truncate	vp	L L L
#
vop_truncate {
	IN struct vnode *vp;
	IN off_t length;
	IN int flags;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% update	vp	L L L
#
vop_update {
	IN struct vnode *vp;
	IN struct timeval *access;
	IN struct timeval *modify;
	IN int waitfor;
};

# Needs work: no vp?
#vop_bwrite {
#	IN struct buf *bp;
#};
