+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
-/*
- * Copyright (c) 1992, 1993, 1994, 1995 Jan-Simon Pendry.
- * Copyright (c) 1992, 1993, 1994, 1995
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Jan-Simon Pendry.
- *
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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.
- *
- * @(#)union_vnops.c 8.32 (Berkeley) 6/23/95
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/proc.h>
-#include <sys/kauth.h>
-#include <sys/file.h>
-#include <sys/time.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/vnode_internal.h>
-#include <sys/mount_internal.h>
-#include <sys/namei.h>
-#include <sys/malloc.h>
-#include <sys/buf_internal.h>
-#include <sys/queue.h>
-#include <sys/lock.h>
-#include <miscfs/union/union.h>
-#include <vfs/vfs_support.h>
-#include <sys/ubc.h>
-#include <sys/kdebug.h>
-#include <sys/uio_internal.h>
-
-/* called with no union lock held */
-static int
-union_lookup1(struct vnode *udvp, struct vnode **dvpp, struct vnode **vpp,
- struct componentname *cnp)
-{
- int error;
- vfs_context_t ctx = cnp->cn_context;
- struct vnode *tdvp;
- struct vnode *dvp;
- struct mount *mp;
-
- dvp = *dvpp;
-
- /*
- * If stepping up the directory tree, check for going
- * back across the mount point, in which case do what
- * lookup would do by stepping back down the mount
- * hierarchy.
- */
- if (cnp->cn_flags & ISDOTDOT) {
- while ((dvp != udvp) && (dvp->v_flag & VROOT)) {
- /*
- * Don't do the NOCROSSMOUNT check
- * at this level. By definition,
- * union fs deals with namespaces, not
- * filesystems.
- */
- tdvp = dvp;
- *dvpp = dvp = dvp->v_mount->mnt_vnodecovered;
- vnode_put(tdvp);
- vnode_get(dvp);
- }
- }
-
- error = VNOP_LOOKUP(dvp, &tdvp, cnp, ctx);
- if (error)
- return (error);
-
- dvp = tdvp;
- /*
- * Lastly check if the current node is a mount point in
- * which case walk up the mount hierarchy making sure not to
- * bump into the root of the mount tree (ie. dvp != udvp).
- */
- while (dvp != udvp && (dvp->v_type == VDIR) &&
- (mp = dvp->v_mountedhere)) {
- if (vfs_busy(mp, LK_NOWAIT)) {
- vnode_put(dvp);
- return(ENOENT);
- }
- error = VFS_ROOT(mp, &tdvp, ctx);
- vfs_unbusy(mp);
- if (error) {
- vnode_put(dvp);
- return (error);
- }
-
- vnode_put(dvp);
- dvp = tdvp;
- }
-
- *vpp = dvp;
- return (0);
-}
-
-static int
-union_lookup(struct vnop_lookup_args *ap)
-/*
- struct vnop_lookup_args {
- struct vnodeop_desc *a_desc;
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- vfs_context_t a_context;
- } *ap)
-*/
-{
- int error;
- int uerror = 0;
- int lerror = 0;
- struct vnode *uppervp, *lowervp;
- struct vnode *upperdvp, *lowerdvp;
- struct vnode *dvp = ap->a_dvp;
- struct union_node *dun;
- struct componentname *cnp = ap->a_cnp;
- vfs_context_t ctx = cnp->cn_context;
- int lockparent = cnp->cn_flags & LOCKPARENT;
- struct union_mount *um;
- kauth_cred_t saved_cred;
- int iswhiteout;
- struct vnode_attr va;
- int isfaultfs = 0;
- int upperlookup = 0;
- int retry_count = 0;
-
-#ifdef notyet
- if (cnp->cn_namelen == 3 &&
- cnp->cn_nameptr[2] == '.' &&
- cnp->cn_nameptr[1] == '.' &&
- cnp->cn_nameptr[0] == '.') {
- dvp = *ap->a_vpp = LOWERVP(ap->a_dvp);
- if (dvp == NULLVP)
- return (ENOENT);
- vnode_get(dvp);
-
- return (0);
- }
-#endif
-
-
-
-retry:
- union_lock();
- um = MOUNTTOUNIONMOUNT(dvp->v_mount);
- dun = VTOUNION(dvp);
- upperdvp = dun->un_uppervp;
- lowerdvp = dun->un_lowervp;
- uppervp = NULLVP;
- lowervp = NULLVP;
- iswhiteout = 0;
-
- union_unlock();
-
- if(UNION_FAULTIN(um))
- isfaultfs = 1;
-
- if (isfaultfs == 0)
- cnp->cn_flags |= LOCKPARENT;
-
- /*
- * do the lookup in the upper level.
- * if that level comsumes additional pathnames,
- * then assume that something special is going
- * on and just return that vnode.
- */
- if (upperdvp != NULLVP) {
- if (lockparent != 0)
- cnp->cn_flags &= ~LOCKPARENT;
- uerror = union_lookup1(um->um_uppervp, &upperdvp,
- &uppervp, cnp);
- upperlookup = 1;
-
- if (cnp->cn_consume != 0) {
- *ap->a_vpp = uppervp;
- if (!lockparent)
- cnp->cn_flags &= ~LOCKPARENT;
- else
- cnp->cn_flags |= LOCKPARENT;
- return (uerror);
- }
- if (uerror == ENOENT || uerror == EJUSTRETURN) {
- if (cnp->cn_flags & ISWHITEOUT) {
- iswhiteout = 1;
- } else if (lowerdvp != NULLVP) {
- VATTR_INIT(&va);
- VATTR_WANTED(&va, va_flags);
- lerror = vnode_getattr(upperdvp, &va, ap->a_context);
- if (lerror == 0 && (va.va_flags & OPAQUE))
- iswhiteout = 1;
- }
- }
- } else {
- uerror = ENOENT;
- }
-
- /*
- * faultingfs: If upper layer lookup is succesful
- * we will return that vp if it is regular file.
- * So so skip lower level lookup
- */
-
- if ((isfaultfs == 1) && (upperlookup == 1) && (uerror == 0) && ((vnode_isreg(uppervp) != 0)))
- goto donelowerlookup;
-
- /*
- * in a similar way to the upper layer, do the lookup
- * in the lower layer. this time, if there is some
- * component magic going on, then vnode_put whatever we got
- * back from the upper layer and return the lower vnode
- * instead.
- */
- if (lowerdvp != NULLVP && !iswhiteout) {
- int nameiop;
-
- /*
- * Only do a LOOKUP on the bottom node, since
- * we won't be making changes to it anyway.
- */
- nameiop = cnp->cn_nameiop;
- cnp->cn_nameiop = LOOKUP;
- if (um->um_op == UNMNT_BELOW) {
- /* XXX BOGUS */
- saved_cred = cnp->cn_context->vc_ucred;
- cnp->cn_context->vc_ucred = um->um_cred;
- if (lockparent != 0)
- cnp->cn_flags &= ~LOCKPARENT;
- lerror = union_lookup1(um->um_lowervp, &lowerdvp,
- &lowervp, cnp);
- cnp->cn_context->vc_ucred = saved_cred;
- } else {
- if (lockparent != 0)
- cnp->cn_flags &= ~LOCKPARENT;
- lerror = union_lookup1(um->um_lowervp, &lowerdvp,
- &lowervp, cnp);
- }
- cnp->cn_nameiop = nameiop;
-
- if (cnp->cn_consume != 0) {
- if (uppervp != NULLVP) {
- vnode_put(uppervp);
- uppervp = NULLVP;
- }
- *ap->a_vpp = lowervp;
- if (!lockparent)
- cnp->cn_flags &= ~LOCKPARENT;
- else
- cnp->cn_flags |= LOCKPARENT;
- return (lerror);
- }
- } else {
- lerror = ENOENT;
- if ((cnp->cn_flags & ISDOTDOT) && dun->un_pvp != NULLVP) {
- lowervp = LOWERVP(dun->un_pvp);
- if (lowervp != NULLVP) {
- lerror = 0;
- }
- }
- }
-
-donelowerlookup:
-
- if (!lockparent)
- cnp->cn_flags &= ~LOCKPARENT;
-
- /*
- * at this point, we have uerror and lerror indicating
- * possible errors with the lookups in the upper and lower
- * layers. additionally, uppervp and lowervp are (locked)
- * references to existing vnodes in the upper and lower layers.
- *
- * there are now three cases to consider.
- * 1. if both layers returned an error, then return whatever
- * error the upper layer generated.
- *
- * 2. if the top layer failed and the bottom layer succeeded
- * then two subcases occur.
- * a. the bottom vnode is not a directory, in which
- * case just return a new union vnode referencing
- * an empty top layer and the existing bottom layer.
- * b. the bottom vnode is a directory, in which case
- * create a new directory in the top-level and
- * continue as in case 3.
- *
- * 3. if the top layer succeeded then return a new union
- * vnode referencing whatever the new top layer and
- * whatever the bottom layer returned.
- */
-
- *ap->a_vpp = NULLVP;
-
- /* case 1. */
- if ((uerror != 0) && (lerror != 0)) {
- if (!lockparent)
- cnp->cn_flags &= ~LOCKPARENT;
- else
- cnp->cn_flags |= LOCKPARENT;
- return (uerror);
- }
-
- /* case 2. */
- if (uerror != 0 /* && (lerror == 0) */ ) {
- if (lowervp->v_type == VDIR) { /* case 2b. */
- /* No need to lock the union here */
- /* if the vnode exists it returns it even if it marks error */
-
- uppervp = NULLVP;
-
- uerror = union_mkshadow(um, upperdvp, cnp, &uppervp);
-
- if ((uerror == EEXIST)){
- if (uppervp == NULLVP) {
- retry_count++;
- if (retry_count <= 2) {
- if (lowervp != NULLVP)
- vnode_put(lowervp);
- goto retry;
- }
- }
- uerror = 0;
- }
-
- if (uerror) {
- if (uppervp != NULLVP) {
- vnode_put(uppervp);
- }
- if (lowervp != NULLVP) {
- vnode_put(lowervp);
- }
- if (!lockparent)
- cnp->cn_flags &= ~LOCKPARENT;
- else
- cnp->cn_flags |= LOCKPARENT;
- return (uerror);
- }
- } else if ((lowervp->v_type == VREG) && (isfaultfs == 1)) {
- error = union_faultin_copyup(&uppervp, upperdvp, lowervp, cnp, ctx);
- uerror = 0;
- }
- }
-
-
- /* if this is faulting filesystem and upper vp exisits skip allocation of union node */
- if ((isfaultfs == 1) && (uerror == 0) && (uppervp != NULLVP) && ((vnode_isreg(uppervp) != 0)|| (vnode_islnk(uppervp) != 0))) {
- vn_checkunionwait(uppervp);
- *ap->a_vpp = uppervp;
- if (lowervp != NULLVP)
- vnode_put(lowervp);
- if (!lockparent)
- cnp->cn_flags &= ~LOCKPARENT;
- else
- cnp->cn_flags |= LOCKPARENT;
- return(0);
- }
-
- union_lock();
- error = union_allocvp(ap->a_vpp, dvp->v_mount, dvp, upperdvp, cnp,
- uppervp, lowervp, 1);
- union_unlock();
-
- if (error) {
- if (uppervp != NULLVP)
- vnode_put(uppervp);
- if (lowervp != NULLVP)
- vnode_put(lowervp);
- }
-
- if (!lockparent)
- cnp->cn_flags &= ~LOCKPARENT;
- else
- cnp->cn_flags |= LOCKPARENT;
- return (error);
-}
-
-static int
-union_create(struct vnop_create_args *ap)
-/*
- struct vnop_create_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vnode_attr *a_vap;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_dvp);
- struct vnode *dvp = un->un_uppervp;
- struct componentname *cnp = ap->a_cnp;
-
- if (dvp != NULLVP) {
- int error;
- struct vnode *vp;
- struct mount *mp;
-
-
- mp = ap->a_dvp->v_mount;
-
- /* note that this is a direct passthrough to the filesystem */
- error = VNOP_CREATE(dvp, &vp, cnp, ap->a_vap, ap->a_context);
- if (error)
- return (error);
-
- /* if this is faulting filesystem and is a reg file, skip allocation of union node */
- if (UNNODE_FAULTIN(un) && (vp != NULLVP) && ((vnode_isreg(vp) != 0)|| (vnode_islnk(vp) != 0))) {
- *ap->a_vpp = vp;
- return(0);
- }
-
-
- union_lock();
- error = union_allocvp(ap->a_vpp, mp, NULLVP, NULLVP, cnp, vp,
- NULLVP, 1);
- union_unlock();
- if (error)
- vnode_put(vp);
- return (error);
- }
-
- return (EROFS);
-}
-
-static int
-union_whiteout(struct vnop_whiteout_args *ap)
-/*
- struct vnop_whiteout_args {
- struct vnode *a_dvp;
- struct componentname *a_cnp;
- int a_flags;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_dvp);
- struct componentname *cnp = ap->a_cnp;
- int error;
-
- if (un->un_uppervp == NULLVP) {
- return (ENOTSUP);
- }
-
- error = (VNOP_WHITEOUT(un->un_uppervp, cnp, ap->a_flags, ap->a_context));
- return(error);
-}
-
-/* mknod can do fifos, chr, blk or whiteout entries */
-static int
-union_mknod(struct vnop_mknod_args *ap)
-/*
- struct vnop_mknod_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vnode_attr *a_vap;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_dvp);
- struct vnode *dvp = un->un_uppervp;
- struct componentname *cnp = ap->a_cnp;
-
- if (dvp != NULLVP) {
- int error;
- struct vnode *vp;
- struct mount *mp;
-
-
- mp = ap->a_dvp->v_mount;
-
- /* note that this is a direct passthrough to the filesystem */
- error = VNOP_MKNOD(dvp, &vp, cnp, ap->a_vap, ap->a_context);
- if (error)
- return (error);
-
- if (vp != NULLVP) {
- union_lock();
- error = union_allocvp(ap->a_vpp, mp, NULLVP, NULLVP,
- cnp, vp, NULLVP, 1);
- union_unlock();
- if (error)
- vnode_put(vp);
- }
- return (error);
- }
- return (EROFS);
-}
-
-static int
-union_open(struct vnop_open_args *ap)
-/*
- struct vnop_open_args {
- struct vnodeop_desc *a_desc;
- struct vnode *a_vp;
- int a_mode;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_vp);
- struct vnode *tvp;
- int mode = ap->a_mode;
- int error;
-
- /*
- * If there is an existing upper vp then simply open that.
- */
-
- tvp = un->un_uppervp;
- if (tvp == NULLVP) {
-
- /*
- * If the lower vnode is being opened for writing, then
- * copy the file contents to the upper vnode and open that,
- * otherwise can simply open the lower vnode.
- */
- tvp = un->un_lowervp;
- if ((ap->a_mode & FWRITE) && (tvp->v_type == VREG)) {
- /* For above below mounts we need draining.. */
- /* This path is not taken for faultin mode */
- /* LOCK the union node as well **/
- union_lock();
- un->un_flags |= UN_LOCKED;
-
- error = union_copyup(un, (mode&O_TRUNC) == 0, ap->a_context);
- un->un_flags &= ~UN_LOCKED;
- if ((un->un_flags & UN_WANT) == UN_WANT) {
- un->un_flags &= ~UN_WANT;
- wakeup(&un->un_flags);
- }
- union_unlock();
- if (error == 0)
- error = VNOP_OPEN(un->un_uppervp, mode, ap->a_context);
- return (error);
- }
-
- /*
- * Just open the lower vnode
- */
- un->un_openl++;
-
- error = VNOP_OPEN(tvp, mode, ap->a_context);
-
- return (error);
- }
-
- error = VNOP_OPEN(tvp, mode, ap->a_context);
-
- return (error);
-}
-
-static int
-union_close(struct vnop_close_args *ap)
-/*
- struct vnop_close_args {
- struct vnode *a_vp;
- int a_fflag;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_vp);
- struct vnode *vp;
- int error = 0;
-
- if ((vp = un->un_uppervp) == NULLVP) {
-#ifdef UNION_DIAGNOSTIC
- if (un->un_openl <= 0)
- panic("union: un_openl cnt");
-#endif
- --un->un_openl;
- vp = un->un_lowervp;
- }
-
- ap->a_vp = vp;
- error = (VCALL(vp, VOFFSET(vnop_close), ap));
- return(error);
-}
-
-/*
- * Check access permission on the union vnode.
- * The access check being enforced is to check
- * against both the underlying vnode, and any
- * copied vnode. This ensures that no additional
- * file permissions are given away simply because
- * the user caused an implicit file copy.
- */
-static int
-union_access(struct vnop_access_args *ap)
-/*
- struct vnop_access_args {
- struct vnodeop_desc *a_desc;
- struct vnode *a_vp;
- int a_action;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_vp);
- int error = EACCES;
- struct vnode *vp;
-
- if ((vp = un->un_uppervp) != NULLVP) {
- ap->a_vp = vp;
- return (VCALL(vp, VOFFSET(vnop_access), ap));
- }
-
- if ((vp = un->un_lowervp) != NULLVP) {
- ap->a_vp = vp;
- error = VCALL(vp, VOFFSET(vnop_access), ap);
- if (error == 0) {
- struct union_mount *um = MOUNTTOUNIONMOUNT(vp->v_mount);
-
- if (um->um_op == UNMNT_BELOW) {
- error = VCALL(vp, VOFFSET(vnop_access), ap);
- }
- }
- if (error)
- return (error);
- }
-
- return (error);
-}
-
-/*
- * We handle getattr only to change the fsid and
- * track object sizes
- */
-static int
-union_getattr(struct vnop_getattr_args *ap)
-/*
- struct vnop_getattr_args {
- struct vnode *a_vp;
- struct vnode_attr *a_vap;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error=0;
- struct union_node *un = VTOUNION(ap->a_vp);
- struct vnode *vp = un->un_uppervp;
- struct vnode_attr *vap;
- struct vnode_attr va;
-
-
- /*
- * Some programs walk the filesystem hierarchy by counting
- * links to directories to avoid stat'ing all the time.
- * This means the link count on directories needs to be "correct".
- * The only way to do that is to call getattr on both layers
- * and fix up the link count. The link count will not necessarily
- * be accurate but will be large enough to defeat the tree walkers.
- */
-
- vap = ap->a_vap;
-
- vp = un->un_uppervp;
- if (vp != NULLVP) {
- /*
- * It's not clear whether vnop_getattr is to be
- * called with the vnode locked or not. stat() calls
- * it with (vp) locked, and fstat calls it with
- * (vp) unlocked.
- * In the mean time, compensate here by checking
- * the union_node's lock flag.
- */
-
- error = vnode_getattr(vp, vap, ap->a_context);
- if (error) {
- return (error);
- }
- union_lock();
- union_newsize(ap->a_vp, vap->va_data_size, VNOVAL);
- union_unlock();
- }
-
- if (vp == NULLVP) {
- vp = un->un_lowervp;
- } else if (vp->v_type == VDIR) {
- vp = un->un_lowervp;
- VATTR_INIT(&va);
- /* all we want from the lower node is the link count */
- VATTR_WANTED(&va, va_nlink);
- vap = &va;
- } else {
- vp = NULLVP;
- }
-
- if (vp != NULLVP) {
- error = vnode_getattr(vp, vap, ap->a_context);
- if (error) {
- return (error);
- }
- union_lock();
- union_newsize(ap->a_vp, VNOVAL, vap->va_data_size);
- union_unlock();
- }
-
- if ((vap != ap->a_vap) && (vap->va_type == VDIR))
- ap->a_vap->va_nlink += vap->va_nlink;
-
- VATTR_RETURN(ap->a_vap, va_fsid, ap->a_vp->v_mount->mnt_vfsstat.f_fsid.val[0]);
- return (0);
-}
-
-static int
-union_setattr(struct vnop_setattr_args *ap)
-/*
- struct vnop_setattr_args {
- struct vnode *a_vp;
- struct vnode_attr *a_vap;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_vp);
- int error;
-
- /*
- * Handle case of truncating lower object to zero size,
- * by creating a zero length upper object. This is to
- * handle the case of open with O_TRUNC and O_CREAT.
- */
- if (VATTR_IS_ACTIVE(ap->a_vap, va_data_size) &&
- (un->un_uppervp == NULLVP) &&
- /* assert(un->un_lowervp != NULLVP) */
- (un->un_lowervp->v_type == VREG)) {
- union_lock();
- error = union_copyup(un, (ap->a_vap->va_data_size != 0), ap->a_context);
- union_unlock();
- if (error) {
- return (error);
- }
- }
-
- /*
- * Try to set attributes in upper layer,
- * otherwise return read-only filesystem error.
- */
- if (un->un_uppervp != NULLVP) {
- error = vnode_setattr(un->un_uppervp, ap->a_vap, ap->a_context);
- if ((error == 0) && VATTR_IS_ACTIVE(ap->a_vap, va_data_size)) {
- union_lock();
- union_newsize(ap->a_vp, ap->a_vap->va_data_size, VNOVAL);
- union_unlock();
- }
- } else {
- error = EROFS;
- }
-
- return (error);
-}
-
-static int
-union_read(struct vnop_read_args *ap)
-/*
- struct vnop_read_args {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp = OTHERVP(ap->a_vp);
-
- error = VNOP_READ(vp, ap->a_uio, ap->a_ioflag, ap->a_context);
-
- /*
- * XXX
- * perhaps the size of the underlying object has changed under
- * our feet. take advantage of the offset information present
- * in the uio structure.
- */
- if (error == 0) {
- struct union_node *un = VTOUNION(ap->a_vp);
- off_t cur = ap->a_uio->uio_offset;
-
- if (vp == un->un_uppervp) {
- if (cur > un->un_uppersz) {
- union_lock();
- union_newsize(ap->a_vp, cur, VNOVAL);
- union_unlock();
- }
- } else {
- if (cur > un->un_lowersz) {
- union_lock();
- union_newsize(ap->a_vp, VNOVAL, cur);
- union_unlock();
- }
- }
- }
-
- return (error);
-}
-
-static int
-union_write(struct vnop_write_args *ap)
-/*
- struct vnop_write_args {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp;
- struct union_node *un = VTOUNION(ap->a_vp);
-
- vp = UPPERVP(ap->a_vp);
- if (vp == NULLVP)
- panic("union: missing upper layer in write");
-
- error = VNOP_WRITE(vp, ap->a_uio, ap->a_ioflag, ap->a_context);
-
- /*
- * the size of the underlying object may be changed by the
- * write.
- */
- if (error == 0) {
- off_t cur = ap->a_uio->uio_offset;
-
- if (cur > un->un_uppersz) {
- union_lock();
- union_newsize(ap->a_vp, cur, VNOVAL);
- union_unlock();
- }
- }
-
- return (error);
-}
-
-
-static int
-union_ioctl(struct vnop_ioctl_args *ap)
-/*
- struct vnop_ioctl_args {
- struct vnode *a_vp;
- int a_command;
- caddr_t a_data;
- int a_fflag;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- register struct vnode *ovp = OTHERVP(ap->a_vp);
-
- ap->a_vp = ovp;
- return (VCALL(ovp, VOFFSET(vnop_ioctl), ap));
-}
-
-static int
-union_select(struct vnop_select_args *ap)
-/*
- struct vnop_select_args {
- struct vnode *a_vp;
- int a_which;
- int a_fflags;
- void * a_wql;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- register struct vnode *ovp = OTHERVP(ap->a_vp);
-
- ap->a_vp = ovp;
- return (VCALL(ovp, VOFFSET(vnop_select), ap));
-}
-
-static int
-union_revoke(struct vnop_revoke_args *ap)
-/*
- struct vnop_revoke_args {
- struct vnode *a_vp;
- int a_flags;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct vnode *vp = ap->a_vp;
-
- if (UPPERVP(vp))
- VNOP_REVOKE(UPPERVP(vp), ap->a_flags, ap->a_context);
- if (LOWERVP(vp))
- VNOP_REVOKE(LOWERVP(vp), ap->a_flags, ap->a_context);
- vnode_reclaim(vp);
-
- return (0);
-}
-
-static int
-union_mmap(struct vnop_mmap_args *ap)
-/*
- struct vnop_mmap_args {
- struct vnode *a_vp;
- int a_fflags;
- kauth_cred_t a_cred;
- struct proc *a_p;
- } *ap;
-*/
-{
- register struct vnode *ovp = OTHERVP(ap->a_vp);
-
- ap->a_vp = ovp;
- return (VCALL(ovp, VOFFSET(vnop_mmap), ap));
-}
-
-static int
-union_mnomap(struct vnop_mnomap_args *ap)
-/*
- struct vnop_mnomap_args {
- struct vnode *a_vp;
- int a_fflags;
- kauth_cred_t a_cred;
- struct proc *a_p;
- } *ap;
-*/
-{
- register struct vnode *ovp = OTHERVP(ap->a_vp);
-
- ap->a_vp = ovp;
- return (VCALL(ovp, VOFFSET(vnop_mnomap), ap));
-}
-
-static int
-union_fsync(struct vnop_fsync_args *ap)
-/*
- struct vnop_fsync_args {
- struct vnode *a_vp;
- int a_waitfor;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error = 0;
- struct vnode *targetvp = OTHERVP(ap->a_vp);
-
- if (targetvp != NULLVP) {
-
- error = VNOP_FSYNC(targetvp, ap->a_waitfor, ap->a_context);
- }
-
- return (error);
-}
-
-static int
-union_remove(struct vnop_remove_args *ap)
-/*
- struct vnop_remove_args {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error, flags;
- struct union_node *dun = VTOUNION(ap->a_dvp);
- struct union_node *un = VTOUNION(ap->a_vp);
- struct componentname *cnp = ap->a_cnp;
- int busydel = 0;
-
- if (dun->un_uppervp == NULLVP)
- panic("union remove: null upper vnode");
-
- if (UNNODE_FAULTIN(dun) && ((ap->a_vp != NULLVP) &&
- ((vnode_isreg(ap->a_vp) != 0) || (vnode_islnk(ap->a_vp) != 0)))) {
- return(VNOP_REMOVE(dun->un_uppervp, ap->a_vp, ap->a_cnp, ap->a_flags, ap->a_context));
- }
-
- if (un->un_uppervp != NULLVP) {
- struct vnode *dvp = dun->un_uppervp;
- struct vnode *vp = un->un_uppervp;
-
- flags = ap->a_flags;
- if (vnode_isinuse(ap->a_vp, 0))
- busydel = 1;
- if ((flags & VNODE_REMOVE_NODELETEBUSY) && (busydel != 0)) {
- return(EBUSY);
- }
- if (union_dowhiteout(un, cnp->cn_context))
- cnp->cn_flags |= DOWHITEOUT;
-
- if (busydel != 0) {
- union_lock();
- un->un_flags |= UN_DELETED;
- if (un->un_flags & UN_CACHED) {
- un->un_flags &= ~UN_CACHED;
- LIST_REMOVE(un, un_cache);
- }
- union_unlock();
- vnode_ref(vp);
- }
- error = VNOP_REMOVE(dvp, vp, cnp, 0, ap->a_context);
- if (!error) {
- union_lock();
- if (busydel == 0)
- union_removed_upper(un);
- union_unlock();
- }
- } else {
- if (UNNODE_FAULTIN(un))
- panic("faultfs: No uppervp");
- error = union_mkwhiteout(
- MOUNTTOUNIONMOUNT(UNIONTOV(dun)->v_mount),
- dun->un_uppervp, ap->a_cnp, un->un_path);
- }
-
- return (error);
-}
-
-static int
-union_link(struct vnop_link_args *ap)
-/*
- struct vnop_link_args {
- struct vnode *a_vp;
- struct vnode *a_tdvp;
- struct componentname *a_cnp;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error = 0;
- struct componentname *cnp = ap->a_cnp;
- struct union_node *un;
- struct vnode *vp;
- struct vnode *tdvp;
-
- un = VTOUNION(ap->a_tdvp);
-
- if (ap->a_tdvp->v_op != ap->a_vp->v_op) {
- vp = ap->a_vp;
- } else {
- struct union_node *tun = VTOUNION(ap->a_vp);
- if (tun->un_uppervp == NULLVP) {
- if (UNNODE_FAULTIN(tun))
- panic("faultfs: No uppervp");
- if (un->un_uppervp == tun->un_dirvp) {
- }
- union_lock();
- /* Would need to drain for above,below mount and faulin does not enter this path */
- un->un_flags |= UN_LOCKED;
- error = union_copyup(tun, 1, ap->a_context);
- un->un_flags &= ~UN_LOCKED;
- if ((un->un_flags & UN_WANT) == UN_WANT) {
- un->un_flags &= ~UN_WANT;
- wakeup(&un->un_flags);
- }
- union_unlock();
- }
- vp = tun->un_uppervp;
- }
- tdvp = un->un_uppervp;
- if (tdvp == NULLVP)
- error = EROFS;
-
- if (error) {
- return (error);
- }
-
-
- error = (VNOP_LINK(vp, tdvp, cnp, ap->a_context));
- return(error);
-}
-
-static int
-union_rename(struct vnop_rename_args *ap)
-/*
- struct vnop_rename_args {
- struct vnode *a_fdvp;
- struct vnode *a_fvp;
- struct componentname *a_fcnp;
- struct vnode *a_tdvp;
- struct vnode *a_tvp;
- struct componentname *a_tcnp;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
-
- struct vnode *fdvp = ap->a_fdvp;
- struct vnode *fvp = ap->a_fvp;
- struct vnode *tdvp = ap->a_tdvp;
- struct vnode *tvp = ap->a_tvp;
-
-
- if (fdvp->v_op == union_vnodeop_p) { /* always true */
- struct union_node *un = VTOUNION(fdvp);
- if (un->un_uppervp == NULLVP) {
- if (UNNODE_FAULTIN(un))
- panic("faultfs rename: No uppervp");
- /*
- * this should never happen in normal
- * operation but might if there was
- * a problem creating the top-level shadow
- * directory.
- */
- error = EXDEV;
- goto bad;
- }
-
- fdvp = un->un_uppervp;
- }
-
- if (fvp->v_op == union_vnodeop_p) { /* always true */
- struct union_node *un = VTOUNION(fvp);
- if (un->un_uppervp == NULLVP) {
- if (UNNODE_FAULTIN(un))
- panic("faultfs rename: No uppervp");
- /* XXX: should do a copyup */
- error = EXDEV;
- goto bad;
- }
-
- if (un->un_lowervp != NULLVP)
- ap->a_fcnp->cn_flags |= DOWHITEOUT;
-
- fvp = un->un_uppervp;
- }
-
- if (tdvp->v_op == union_vnodeop_p) {
- struct union_node *un = VTOUNION(tdvp);
- if (un->un_uppervp == NULLVP) {
- /*
- * this should never happen in normal
- * operation but might if there was
- * a problem creating the top-level shadow
- * directory.
- */
- if (UNNODE_FAULTIN(un))
- panic("faultfs rename: No uppervp");
- error = EXDEV;
- goto bad;
- }
-
- tdvp = un->un_uppervp;
- }
-
- if (tvp != NULLVP && tvp->v_op == union_vnodeop_p) {
- struct union_node *un = VTOUNION(tvp);
-
- tvp = un->un_uppervp;
- }
-
- return (VNOP_RENAME(fdvp, fvp, ap->a_fcnp, tdvp, tvp, ap->a_tcnp, ap->a_context));
-
-bad:
- return (error);
-}
-
-static int
-union_mkdir(struct vnop_mkdir_args *ap)
-/*
- struct vnop_mkdir_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vnode_attr *a_vap;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_dvp);
- struct vnode *dvp = un->un_uppervp;
- struct componentname *cnp = ap->a_cnp;
-
- if (dvp != NULLVP) {
- int error;
- struct vnode *vp;
-
-
- /* note that this is a direct fallthrough to the filesystem */
- error = VNOP_MKDIR(dvp, &vp, cnp, ap->a_vap, ap->a_context);
- if (error)
- return (error);
-
- union_lock();
- error = union_allocvp(ap->a_vpp, ap->a_dvp->v_mount, ap->a_dvp,
- NULLVP, cnp, vp, NULLVP, 1);
- union_unlock();
- if (error)
- vnode_put(vp);
- return (error);
- }
- return (EROFS);
-}
-
-static int
-union_rmdir(struct vnop_rmdir_args *ap)
-/*
- struct vnop_rmdir_args {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
- struct union_node *dun = VTOUNION(ap->a_dvp);
- struct union_node *un = VTOUNION(ap->a_vp);
- struct componentname *cnp = ap->a_cnp;
- int busydel = 0;
-
- /******* NODE HAS TO BE LOCKED ******/
- if (dun->un_uppervp == NULLVP)
- panic("union rmdir: null upper vnode");
-
- if (un->un_uppervp != NULLVP) {
- struct vnode *dvp = dun->un_uppervp;
- struct vnode *vp = un->un_uppervp;
-
- if (vnode_isinuse(ap->a_vp, 0)) {
- busydel = 1;
- union_lock();
- un->un_flags |= UN_DELETED;
- if (un->un_flags & UN_CACHED) {
- un->un_flags &= ~UN_CACHED;
- LIST_REMOVE(un, un_cache);
- }
- union_unlock();
- vnode_ref(vp);
- }
-
-
- if (union_dowhiteout(un, cnp->cn_context))
- cnp->cn_flags |= DOWHITEOUT;
- error = VNOP_RMDIR(dvp, vp, ap->a_cnp, ap->a_context);
- if (!error) {
- union_lock();
- if (busydel == 0)
- union_removed_upper(un);
- union_unlock();
- }
- } else {
- if (UNNODE_FAULTIN(un))
- panic("faultfs: No uppervp");
- error = union_mkwhiteout(
- MOUNTTOUNIONMOUNT(UNIONTOV(dun)->v_mount),
- dun->un_uppervp, ap->a_cnp, un->un_path);
- }
- return (error);
-}
-
-static int
-union_symlink(struct vnop_symlink_args *ap)
-/*
- struct vnop_symlink_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vnode_attr *a_vap;
- char *a_target;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_dvp);
- struct vnode *dvp = un->un_uppervp;
- struct componentname *cnp = ap->a_cnp;
-
- if (dvp != NULLVP) {
- int error;
- struct vnode *vp;
-
- error = VNOP_SYMLINK(dvp, &vp, cnp, ap->a_vap, ap->a_target, ap->a_context);
- *ap->a_vpp = vp;
- return (error);
- }
- return (EROFS);
-}
-
-/*
- * union_readdir works in concert with getdirentries and
- * readdir(3) to provide a list of entries in the unioned
- * directories. getdirentries is responsible for walking
- * down the union stack. readdir(3) is responsible for
- * eliminating duplicate names from the returned data stream.
- */
-static int
-union_readdir(struct vnop_readdir_args *ap)
-/*
- struct vnop_readdir_args {
- struct vnodeop_desc *a_desc;
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_flags;
- int *a_eofflag;
- int *a_numdirent;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct union_node *un = VTOUNION(ap->a_vp);
- struct vnode *uvp = un->un_uppervp;
-
- if (ap->a_flags & (VNODE_READDIR_EXTENDED | VNODE_READDIR_REQSEEKOFF))
- return (EINVAL);
-
- if (uvp == NULLVP)
- return (0);
-
- ap->a_vp = uvp;
- return (VCALL(uvp, VOFFSET(vnop_readdir), ap));
-}
-
-static int
-union_readlink(struct vnop_readlink_args *ap)
-/*
- struct vnop_readlink_args {
- struct vnode *a_vp;
- struct uio *a_uio;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp = OTHERVP(ap->a_vp);
-
- ap->a_vp = vp;
- error = VCALL(vp, VOFFSET(vnop_readlink), ap);
-
- return (error);
-}
-
-static int
-union_inactive(struct vnop_inactive_args *ap)
-/*
- struct vnop_inactive_args {
- struct vnode *a_vp;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- struct vnode *vp = ap->a_vp;
- struct union_node *un = VTOUNION(vp);
-
- /*
- * Do nothing (and _don't_ bypass).
- * Wait to vnode_put lowervp until reclaim,
- * so that until then our union_node is in the
- * cache and reusable.
- *
- * NEEDSWORK: Someday, consider inactive'ing
- * the lowervp and then trying to reactivate it
- * with capabilities (v_id)
- * like they do in the name lookup cache code.
- * That's too much work for now.
- */
-
- union_lock();
- if (un->un_flags & UN_DELETED) {
- if(un->un_uppervp != NULLVP) {
- vnode_rele(un->un_uppervp);
- }
- union_removed_upper(un);
- }
-
- if (un->un_dircache != 0) {
- union_dircache_free(un);
- }
- if (un->un_flags & UN_DIRENVN) {
- vnode_recycle(vp);
- }
-
- union_unlock();
-
- return (0);
-}
-
-static int
-union_reclaim(struct vnop_reclaim_args *ap)
-/*
- struct vnop_reclaim_args {
- struct vnode *a_vp;
- vfs_context_t a_context;
- } *ap;
-*/
-{
-
- union_lock();
- union_freevp(ap->a_vp);
- union_unlock();
-
- return (0);
-}
-
-static int
-union_blockmap(struct vnop_blockmap_args *ap)
-/*
- struct vnop_blockmap_args {
- struct vnode *a_vp;
- off_t a_offset;
- size_t a_size;
- daddr64_t *a_bpn;
- size_t *a_run;
- void *a_poff;
- int a_flags;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp = OTHERVP(ap->a_vp);
-
- ap->a_vp = vp;
- error = VCALL(vp, VOFFSET(vnop_blockmap), ap);
-
- return (error);
-}
-
-static int
-union_pathconf(struct vnop_pathconf_args *ap)
-/*
- struct vnop_pathconf_args {
- struct vnode *a_vp;
- int a_name;
- int *a_retval;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp = OTHERVP(ap->a_vp);
-
- ap->a_vp = vp;
- error = VCALL(vp, VOFFSET(vnop_pathconf), ap);
-
- return (error);
-}
-
-static int
-union_advlock(struct vnop_advlock_args *ap)
-/*
- struct vnop_advlock_args {
- struct vnode *a_vp;
- caddr_t a_id;
- int a_op;
- struct flock *a_fl;
- int a_flags;
- vfs_context_t a_context;
- } *ap;
-*/
-{
- register struct vnode *ovp = OTHERVP(ap->a_vp);
-
- ap->a_vp = ovp;
- return (VCALL(ovp, VOFFSET(vnop_advlock), ap));
-}
-
-
-/*
- * XXX - vnop_strategy must be hand coded because it has no
- * vnode in its arguments.
- * This goes away with a merged VM/buffer cache.
- */
-static int
-union_strategy(struct vnop_strategy_args *ap)
-/*
- struct vnop_strategy_args {
- struct buf *a_bp;
- } *ap;
-*/
-{
- struct buf *bp = ap->a_bp;
- int error;
- struct vnode *savedvp;
-
- savedvp = buf_vnode(bp);
- buf_setvnode(bp, OTHERVP(savedvp));
-
-#if DIAGNOSTIC
- if (buf_vnode(bp) == NULLVP)
- panic("union_strategy: nil vp");
- if (((buf_flags(bp) & B_READ) == 0) &&
- (buf_vnode(bp) == LOWERVP(savedvp)))
- panic("union_strategy: writing to lowervp");
-#endif
-
- error = VNOP_STRATEGY(bp);
- buf_setvnode(bp, savedvp);
-
- return (error);
-}
-
-/* Pagein */
-static int
-union_pagein(struct vnop_pagein_args *ap)
-/*
- struct vnop_pagein_args {
- struct vnode *a_vp,
- upl_t a_pl,
- upl_offset_t a_pl_offset,
- off_t a_f_offset,
- size_t a_size,
- int a_flags
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp = OTHERVP(ap->a_vp);
-
- error = VNOP_PAGEIN(vp, ap->a_pl, ap->a_pl_offset, ap->a_f_offset,
- ap->a_size, ap->a_flags, ap->a_context);
-
- /*
- * XXX
- * perhaps the size of the underlying object has changed under
- * our feet. take advantage of the offset information present
- * in the uio structure.
- */
- if (error == 0) {
- struct union_node *un = VTOUNION(ap->a_vp);
- off_t cur = ap->a_f_offset + (off_t)ap->a_pl_offset;
-
- if (vp == un->un_uppervp) {
- if (cur > un->un_uppersz) {
- union_lock();
- union_newsize(ap->a_vp, cur, VNOVAL);
- union_unlock();
- }
- } else {
- if (cur > un->un_lowersz) {
- union_lock();
- union_newsize(ap->a_vp, VNOVAL, cur);
- union_unlock();
- }
- }
- }
-
- return (error);
-}
-
-/* Pageout */
-static int
-union_pageout(struct vnop_pageout_args *ap)
-/*
- struct vnop_pageout_args {
- struct vnode *a_vp,
- upl_t a_pl,
- vm_offset_t a_pl_offset,
- off_t a_f_offset,
- size_t a_size,
- int a_flags
- vfs_context_t a_context;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp;
- struct union_node *un = VTOUNION(ap->a_vp);
-
- vp = UPPERVP(ap->a_vp);
- if (vp == NULLVP)
- panic("union: missing upper layer in pageout");
-
- error = VNOP_PAGEOUT(vp, ap->a_pl, ap->a_pl_offset, ap->a_f_offset,
- ap->a_size, ap->a_flags, ap->a_context);
-
- /*
- * the size of the underlying object may be changed by the
- * write.
- */
- if (error == 0) {
- off_t cur = ap->a_f_offset + (off_t)ap->a_pl_offset;
-
- if (cur > un->un_uppersz) {
- union_lock();
- union_newsize(ap->a_vp, cur, VNOVAL);
- union_unlock();
- }
- }
-
- return (error);
-}
-
-/* Blktooff derives file offset for the given logical block number */
-static int
-union_blktooff(struct vnop_blktooff_args *ap)
-/*
- struct vnop_blktooff_args {
- struct vnode *a_vp;
- daddr64_t a_lblkno;
- off_t *a_offset;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp = OTHERVP(ap->a_vp);
-
- error = VNOP_BLKTOOFF(vp, ap->a_lblkno, ap->a_offset);
-
- return(error);
-}
-
-/* offtoblk derives file offset for the given logical block number */
-static int
-union_offtoblk(struct vnop_offtoblk_args *ap)
-/*
- struct vnop_offtoblk_args {
- struct vnode *a_vp;
- off_t a_offset;
- daddr64_t *a_lblkno;
- } *ap;
-*/
-{
- int error;
- struct vnode *vp = OTHERVP(ap->a_vp);
-
- error = VNOP_OFFTOBLK(vp, ap->a_offset, ap->a_lblkno);
-
- return(error);
-}
-
-#define VOPFUNC int (*)(void *)
-
-/*
- * Global vfs data structures
- */
-int (**union_vnodeop_p)(void *);
-struct vnodeopv_entry_desc union_vnodeop_entries[] = {
- { &vnop_default_desc, (VOPFUNC)vn_default_error },
- { &vnop_lookup_desc, (VOPFUNC)union_lookup }, /* lookup */
- { &vnop_create_desc, (VOPFUNC)union_create }, /* create */
- { &vnop_whiteout_desc, (VOPFUNC)union_whiteout }, /* whiteout */
- { &vnop_mknod_desc, (VOPFUNC)union_mknod }, /* mknod */
- { &vnop_open_desc, (VOPFUNC)union_open }, /* open */
- { &vnop_close_desc, (VOPFUNC)union_close }, /* close */
- { &vnop_access_desc, (VOPFUNC)union_access }, /* access */
- { &vnop_getattr_desc, (VOPFUNC)union_getattr }, /* getattr */
- { &vnop_setattr_desc, (VOPFUNC)union_setattr }, /* setattr */
- { &vnop_read_desc, (VOPFUNC)union_read }, /* read */
- { &vnop_write_desc, (VOPFUNC)union_write }, /* write */
- { &vnop_ioctl_desc, (VOPFUNC)union_ioctl }, /* ioctl */
- { &vnop_select_desc, (VOPFUNC)union_select }, /* select */
- { &vnop_revoke_desc, (VOPFUNC)union_revoke }, /* revoke */
- { &vnop_mmap_desc, (VOPFUNC)union_mmap }, /* mmap */
- { &vnop_mnomap_desc, (VOPFUNC)union_mnomap }, /* mnomap */
- { &vnop_fsync_desc, (VOPFUNC)union_fsync }, /* fsync */
- { &vnop_remove_desc, (VOPFUNC)union_remove }, /* remove */
- { &vnop_link_desc, (VOPFUNC)union_link }, /* link */
- { &vnop_rename_desc, (VOPFUNC)union_rename }, /* rename */
- { &vnop_mkdir_desc, (VOPFUNC)union_mkdir }, /* mkdir */
- { &vnop_rmdir_desc, (VOPFUNC)union_rmdir }, /* rmdir */
- { &vnop_symlink_desc, (VOPFUNC)union_symlink }, /* symlink */
- { &vnop_readdir_desc, (VOPFUNC)union_readdir }, /* readdir */
- { &vnop_readlink_desc, (VOPFUNC)union_readlink }, /* readlink */
- { &vnop_inactive_desc, (VOPFUNC)union_inactive }, /* inactive */
- { &vnop_reclaim_desc, (VOPFUNC)union_reclaim }, /* reclaim */
- { &vnop_strategy_desc, (VOPFUNC)union_strategy }, /* strategy */
- { &vnop_pathconf_desc, (VOPFUNC)union_pathconf }, /* pathconf */
- { &vnop_advlock_desc, (VOPFUNC)union_advlock }, /* advlock */
-#ifdef notdef
- { &vnop_bwrite_desc, (VOPFUNC)union_bwrite }, /* bwrite */
-#endif
- { &vnop_pagein_desc, (VOPFUNC)union_pagein }, /* Pagein */
- { &vnop_pageout_desc, (VOPFUNC)union_pageout }, /* Pageout */
- { &vnop_copyfile_desc, (VOPFUNC)err_copyfile }, /* Copyfile */
- { &vnop_blktooff_desc, (VOPFUNC)union_blktooff }, /* blktooff */
- { &vnop_offtoblk_desc, (VOPFUNC)union_offtoblk }, /* offtoblk */
- { &vnop_blockmap_desc, (VOPFUNC)union_blockmap }, /* blockmap */
- { (struct vnodeop_desc*)NULL, (int(*)())NULL }
-};
-struct vnodeopv_desc union_vnodeop_opv_desc =
- { &union_vnodeop_p, union_vnodeop_entries };
projects / apple / xnu.git / blobdiff