#	$OpenBSD: vnode_if.src,v 1.29 2005/07/14 09:04:59 pedro Exp $
#	$NetBSD: vnode_if.src,v 1.10 1996/05/11 18:26:27 mycroft Exp $
#
# Copyright (c) 1992, 1993
#	The Regents of the University of California.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. Neither the name of the University nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#	@(#)vnode_if.src	8.3 (Berkeley) 2/3/94
#


#
# 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 successful 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.
#


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

#
#% lookup	dvp	L ? ?
#% lookup	vpp	- L -
#
#
# Note that EJUSTRETURN is not considered an error condition for locking
# purposes.
#
# if both ISLASTCN and LOCKPARENT are set in cnp->cn_flags then 
#
#	dvp  L L L*
#
# otherwise,
#
#       dvp  L U L*
#
# * The lock state on return is indeterminate since the lookup implementations
# unlock and relock the vnode (an operation which is not guaranteed to 
# succeed). However, these types of failures should be rare. Unfortunately,
# they are currently undetectable.
#

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 SHOULDBELOCKED WILLPUT struct vnode *dvp;
	OUT struct vnode **vpp;
	IN struct componentname *cnp;
	IN struct vattr *vap;
};

#
#% mknod	dvp	L U U
#% mknod	vpp	- X -
#

vop_mknod {
	IN SHOULDBELOCKED WILLPUT struct vnode *dvp;
	OUT WILLRELE struct vnode **vpp;
	IN struct componentname *cnp;
	IN struct vattr *vap;
};

#
#% open		vp	= = =
#

vop_open {
	IN struct vnode *vp;
	IN int mode;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% close	vp	L L L
#

vop_close {
	IN SHOULDBELOCKED struct vnode *vp;
	IN int fflag;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% access	vp	L L L
#

vop_access {
	IN SHOULDBELOCKED 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 SHOULDBELOCKED struct vnode *vp;
	IN struct vattr *vap;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% read		vp	L L L
#

vop_read {
	IN SHOULDBELOCKED struct vnode *vp;
	INOUT struct uio *uio;
	IN int ioflag;
	IN struct ucred *cred;
};

#
#% write	vp	L L L
#

vop_write {
	IN SHOULDBELOCKED 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 u_long command;
	IN void *data;
	IN int fflag;
	IN struct ucred *cred;
	IN struct proc *p;
};

#
#% poll	vp	U U U
#
vop_poll {
	IN struct vnode *vp;
	IN int events;
	IN struct proc *p;
};

#
#% kqfilter	vp	U U U
#
vop_kqfilter {
	IN struct vnode *vp;
	IN struct knote *kn;
};

#
#% revoke	vp	U U U
#
vop_revoke {
	IN struct vnode *vp;
	IN int flags;
};

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

#
#% remove	dvp	L U U
#% remove	vp	L U U
#

vop_remove {
	IN SHOULDBELOCKED WILLPUT struct vnode *dvp;
	IN SHOULDBELOCKED WILLPUT struct vnode *vp;
	IN struct componentname *cnp;
};

#
#% link		dvp	L U U
#% link		vp	U U U
#
vop_link {
	IN SHOULDBELOCKED WILLPUT struct vnode *dvp;
	IN struct vnode *vp;
	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 SHOULDBELOCKED WILLPUT struct vnode *tdvp;
	IN WILLRELE struct vnode *tvp;
	IN struct componentname *tcnp;
};

#
#% mkdir	dvp	L U U
#% mkdir	vpp	- L -
#

vop_mkdir {
	IN SHOULDBELOCKED WILLPUT 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 SHOULDBELOCKED WILLPUT struct vnode *dvp;
	IN SHOULDBELOCKED WILLPUT 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 SHOULDBELOCKED WILLPUT 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 SHOULDBELOCKED struct vnode *vp;
	INOUT struct uio *uio;
	IN struct ucred *cred;
	INOUT int *eofflag;
	OUT int *ncookies;
	INOUT u_long **cookies;
};

#
#% readlink	vp	L L L
#
vop_readlink {
	IN SHOULDBELOCKED 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	L U U
#
vop_inactive {
	IN SHOULDBELOCKED WILLUNLOCK struct vnode *vp;
	IN struct proc *p;
};

#
#% reclaim	vp	U U U
#

vop_reclaim {
	IN struct vnode *vp;
	IN struct proc *p;
};

#
#% lock		vp	U L U
#

vop_lock {
	IN struct vnode *vp;
	IN int flags;
	IN struct proc *p;
};

#
#% unlock	vp	L U L
#

vop_unlock {
	IN struct vnode *vp;
	IN int flags;
	IN struct proc *p;
};

#
#% bmap		vp	L L L
#% bmap		vpp	- U -
#

vop_bmap {
	IN SHOULDBELOCKED struct vnode *vp;
	IN daddr_t bn;
	OUT struct vnode **vpp;
	IN daddr_t *bnp;
	OUT int *runp;
};

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

#
#% print	vp	= = =
#
vop_print {
	IN struct vnode *vp;
};
#
#% pathconf	vp	L L L
#
vop_pathconf {
	IN SHOULDBELOCKED struct vnode *vp;
	IN int name;
	OUT register_t *retval;
};

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

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

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