600 lines
12 KiB
Plaintext
600 lines
12 KiB
Plaintext
# $NetBSD: vnode_if.src,v 1.33 2003/04/10 20:35:36 jdolecek Exp $
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#
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# Copyright (c) 1992, 1993
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# The Regents of the University of California. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. All advertising materials mentioning features or use of this software
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# must display the following acknowledgement:
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# This product includes software developed by the University of
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# California, Berkeley and its contributors.
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# 4. Neither the name of the University nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# @(#)vnode_if.src 8.14 (Berkeley) 8/6/95
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#
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#
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#
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# Above each of the vop descriptors is a specification of the locking
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# protocol used by each vop call. The first column is the name of
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# the variable, the remaining three columns are in, out and error
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# respectively. The "in" column defines the lock state on input,
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# the "out" column defines the state on succesful return, and the
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# "error" column defines the locking state on error exit.
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#
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# The locking value can take the following values:
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# L: locked.
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# U: unlocked.
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# -: not applicable. vnode does not yet (or no longer) exists.
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# =: the same on input and output, may be either L or U.
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# X: locked if not nil.
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#
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# For operations other than VOP_LOOKUP which require a component name
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# parameter, the flags required for the initial namei() call are listed.
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# Additional flags may be added to the namei() call, but these are required.
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#
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#
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#% lookup dvp L ? ?
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#% lookup vpp - L -
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#
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# XXX - the lookup locking protocol defies simple description and depends
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# on the flags and operation fields in the (cnp) structure. Note
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# especially that *vpp may equal dvp and both may be locked.
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#
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# More details:
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# There are three types of lookups: ".", ".." (ISDOTDOT), and other.
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# On successful lookup of ".", a reference is added to dvp, and it
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# is returned in *vpp.
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# To look up ISDOTDOT, dvp is unlocked, the ".." node is locked, and
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# then dvp is relocked iff LOCKPARENT is set and this is the last
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# component name (ISLASTCN set). This preserves the
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# protocol of always locking nodes from root ("/") downward and
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# prevents deadlock.
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# Other lookups find the named node (creating the vnode if needed) and
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# return it, locked, in *vpp.
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# For non-"." lookups, if LOCKPARENT is not set or this was not the
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# last component name, dvp is returned unlocked on a successful
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# lookup.
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# On failure, *vpp is NULL, and *dvp is left locked. If there was
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# an error re-locking dvp (for instance in the ISDOTDOT case),
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# the error is returned with PDIRUNLOCK set.
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#
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# *vpp is always locked on return if the operation succeeds.
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# typically, if *vpp == dvp, you need to release twice, but unlock once.
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#
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# The PDIRUNLOCK flag is set when dvp is unlocked in the lookup routine.
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# It signals the caller that dvp's lock state changed. It will
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# be set on exit if either a successful lookup unlocked the
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# parrent, or there was an error re-locking dvp in the ISDOTDOT case.
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#
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# See sys/sys/namei.h for a description of the SAVENAME and SAVESTART
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# flags.
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#
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vop_lookup {
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IN struct vnode *dvp;
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INOUT struct vnode **vpp;
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IN struct componentname *cnp;
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};
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#
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#% create dvp L U U
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#% create vpp - L -
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#
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#! create cnp CREATE, LOCKPARENT
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#
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vop_create {
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IN WILLPUT struct vnode *dvp;
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OUT struct vnode **vpp;
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IN struct componentname *cnp;
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IN struct vattr *vap;
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};
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#
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#% mknod dvp L U U
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#% mknod vpp - L -
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#
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#! mknod cnp CREATE, LOCKPARENT
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#
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vop_mknod {
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IN WILLPUT struct vnode *dvp;
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OUT struct vnode **vpp;
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IN struct componentname *cnp;
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IN struct vattr *vap;
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};
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#
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#% open vp L L L
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#
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vop_open {
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IN struct vnode *vp;
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IN int mode;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% close vp L L L
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#
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vop_close {
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IN struct vnode *vp;
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IN int fflag;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% access vp L L L
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#
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vop_access {
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IN struct vnode *vp;
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IN int mode;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% getattr vp = = =
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#
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vop_getattr {
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IN struct vnode *vp;
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IN struct vattr *vap;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% setattr vp L L L
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#
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vop_setattr {
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IN struct vnode *vp;
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IN struct vattr *vap;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% read vp L L L
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#
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vop_read {
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IN struct vnode *vp;
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INOUT struct uio *uio;
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IN int ioflag;
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IN struct ucred *cred;
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};
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#
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#% write vp L L L
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#
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vop_write {
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IN struct vnode *vp;
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INOUT struct uio *uio;
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IN int ioflag;
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IN struct ucred *cred;
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};
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#
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#% ioctl vp U U U
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#
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vop_ioctl {
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IN struct vnode *vp;
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IN u_long command;
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IN void *data;
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IN int fflag;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% fcntl vp L L L
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#
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vop_fcntl {
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IN struct vnode *vp;
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IN u_int command;
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IN void *data;
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IN int fflag;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% poll vp U U U
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#
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vop_poll {
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IN struct vnode *vp;
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IN int events;
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IN struct proc *p;
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};
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#
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#% kqfilter vp U U U
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#
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vop_kqfilter {
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IN struct vnode *vp;
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IN struct knote *kn;
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};
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#
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#% revoke vp U U U
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#
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vop_revoke {
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IN struct vnode *vp;
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IN int flags;
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};
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#
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#% mmap vp = = =
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#
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vop_mmap {
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IN struct vnode *vp;
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IN int fflags;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% fsync vp L L L
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#
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vop_fsync {
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IN struct vnode *vp;
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IN struct ucred *cred;
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IN int flags;
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IN off_t offlo
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IN off_t offhi
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IN struct proc *p;
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};
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#
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# Needs work: Is newoff right? What's it mean?
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#
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vop_seek {
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IN struct vnode *vp;
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IN off_t oldoff;
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IN off_t newoff;
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IN struct ucred *cred;
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};
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#
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#% remove dvp L U U
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#% remove vp L U U
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#
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#! remove cnp DELETE, LOCKPARENT | LOCKLEAF
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#
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vop_remove {
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IN WILLPUT struct vnode *dvp;
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IN WILLPUT struct vnode *vp;
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IN struct componentname *cnp;
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};
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#
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#% link vp U U U
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#% link tdvp L U U
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#
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#! link cnp CREATE, LOCKPARENT
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#
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vop_link {
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IN WILLPUT struct vnode *dvp;
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IN struct vnode *vp;
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IN struct componentname *cnp;
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};
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#
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#% rename fdvp U U U
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#% rename fvp U U U
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#% rename tdvp L U U
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#% rename tvp X U U
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#
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#! rename fcnp DELETE, WANTPARENT | SAVESTART
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#! rename tcnp RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART
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#
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# XXX the vop_rename routines should REALLY NOT be depending on SAVESTART!
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#
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vop_rename {
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IN WILLRELE struct vnode *fdvp;
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IN WILLRELE struct vnode *fvp;
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IN struct componentname *fcnp;
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IN WILLPUT struct vnode *tdvp;
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IN WILLPUT struct vnode *tvp;
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IN struct componentname *tcnp;
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};
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#
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#% mkdir dvp L U U
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#% mkdir vpp - L -
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#
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#! mkdir cnp CREATE, LOCKPARENT
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#
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vop_mkdir {
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IN WILLPUT struct vnode *dvp;
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OUT struct vnode **vpp;
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IN struct componentname *cnp;
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IN struct vattr *vap;
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};
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#
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#% rmdir dvp L U U
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#% rmdir vp L U U
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#
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#! rmdir cnp DELETE, LOCKPARENT | LOCKLEAF
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#
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vop_rmdir {
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IN WILLPUT struct vnode *dvp;
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IN WILLPUT struct vnode *vp;
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IN struct componentname *cnp;
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};
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#
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#% symlink dvp L U U
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#% symlink vpp - L -
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#
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#! symlink cnp CREATE, LOCKPARENT
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#
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vop_symlink {
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IN WILLPUT struct vnode *dvp;
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OUT struct vnode **vpp;
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IN struct componentname *cnp;
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IN struct vattr *vap;
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IN char *target;
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};
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#
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#% readdir vp L L L
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#
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vop_readdir {
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IN struct vnode *vp;
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INOUT struct uio *uio;
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IN struct ucred *cred;
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OUT int *eofflag;
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OUT off_t **cookies;
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IN int *ncookies;
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};
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#
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#% readlink vp L L L
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#
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vop_readlink {
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IN struct vnode *vp;
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INOUT struct uio *uio;
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IN struct ucred *cred;
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};
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#
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#% abortop dvp = = =
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#
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#! abortop cnp as appropriate.
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#
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vop_abortop {
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IN struct vnode *dvp;
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IN struct componentname *cnp;
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};
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#
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#% inactive vp L U U
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#
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vop_inactive {
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IN WILLUNLOCK struct vnode *vp;
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IN struct proc *p;
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};
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#
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#% reclaim vp U U U
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#
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vop_reclaim {
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IN struct vnode *vp;
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IN struct proc *p;
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};
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#
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#% lock vp U L U
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#
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vop_lock {
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IN struct vnode *vp;
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IN int flags;
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};
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#
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#% unlock vp L U L
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#
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vop_unlock {
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IN struct vnode *vp;
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IN int flags;
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};
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#
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#% bmap vp L L L
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#% bmap vpp - U -
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#
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vop_bmap {
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IN struct vnode *vp;
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IN daddr_t bn;
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OUT struct vnode **vpp;
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IN daddr_t *bnp;
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OUT int *runp;
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};
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#
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# Needs work: no vp?
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#
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#vop_strategy {
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# IN struct buf *bp;
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#};
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#
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#% print vp = = =
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#
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vop_print {
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IN struct vnode *vp;
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};
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#
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#% islocked vp = = =
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#
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vop_islocked {
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IN struct vnode *vp;
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};
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#
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#% pathconf vp L L L
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#
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vop_pathconf {
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IN struct vnode *vp;
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IN int name;
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OUT register_t *retval;
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};
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#
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#% advlock vp U U U
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#
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vop_advlock {
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IN struct vnode *vp;
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IN void *id;
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IN int op;
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IN struct flock *fl;
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IN int flags;
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};
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#
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#% blkatoff vp L L L
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#
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vop_blkatoff {
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IN struct vnode *vp;
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IN off_t offset;
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OUT char **res;
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OUT struct buf **bpp;
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};
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#
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#% valloc pvp L L L
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#
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vop_valloc {
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IN struct vnode *pvp;
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IN int mode;
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IN struct ucred *cred;
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OUT struct vnode **vpp;
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};
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#
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#% balloc vp L L L
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#
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vop_balloc {
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IN struct vnode *vp;
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IN off_t startoffset;
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IN int size;
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IN struct ucred *cred;
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IN int flags;
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OUT struct buf **bpp;
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};
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#
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#% reallocblks vp L L L
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#
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vop_reallocblks {
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IN struct vnode *vp;
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IN struct cluster_save *buflist;
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};
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#
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#% vfree pvp L L L
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#
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vop_vfree {
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IN struct vnode *pvp;
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IN ino_t ino;
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IN int mode;
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};
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#
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#% truncate vp L L L
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#
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vop_truncate {
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IN struct vnode *vp;
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IN off_t length;
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IN int flags;
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IN struct ucred *cred;
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IN struct proc *p;
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};
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#
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#% update vp L L L
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#
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vop_update {
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IN struct vnode *vp;
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IN struct timespec *access;
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IN struct timespec *modify;
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IN int flags;
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};
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#
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#% lease vp = = =
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#
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vop_lease {
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IN struct vnode *vp;
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IN struct proc *p;
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IN struct ucred *cred;
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IN int flag;
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};
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#
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#% whiteout dvp L L L
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#% whiteout cnp - - -
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#% whiteout flag - - -
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#
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#! whiteout cnp CREATE, LOCKPARENT
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#
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vop_whiteout {
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IN struct vnode *dvp;
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IN struct componentname *cnp;
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IN int flags;
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};
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#
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# Needs work: no vp?
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#
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#vop_bwrite {
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# IN struct buf *bp;
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#};
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#
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#% getpages vp L L L
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#
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vop_getpages {
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IN struct vnode *vp;
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IN voff_t offset;
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IN struct vm_page **m;
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IN int *count;
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IN int centeridx;
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IN vm_prot_t access_type;
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IN int advice;
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IN int flags;
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};
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#
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#% putpages vp = = =
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#
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vop_putpages {
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IN struct vnode *vp;
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IN voff_t offlo;
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IN voff_t offhi;
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IN int flags;
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|
};
|