4.4BSD/usr/src/sys/miscfs/lofs/lofs_vnops.c
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* All rights reserved.
*
* This code is derived from software donated 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.
*
* @(#)lofs_vnops.c 8.1 (Berkeley) 6/10/93
*
* $Id: lofs_vnops.c,v 1.11 1992/05/30 10:05:43 jsp Exp jsp $
*/
/*
* Loopback Filesystem
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <miscfs/lofs/lofs.h>
/*
* Basic strategy: as usual, do as little work as possible.
* Nothing is ever locked in the lofs'ed filesystem, all
* locks are held in the underlying filesystems.
*/
/*
* Save a vnode and replace with
* the lofs'ed one
*/
#define PUSHREF(v, nd) \
{ \
struct { struct vnode *vnp; } v; \
v.vnp = (nd); \
(nd) = LOFSVP(v.vnp)
/*
* Undo the PUSHREF
*/
#define POP(v, nd) \
\
(nd) = v.vnp; \
}
/*
* vp is the current namei directory
* ndp is the name to locate in that directory...
*/
lofs_lookup(ap)
struct vop_lookup_args /* {
struct vnode * a_dvp;
struct vnode ** a_vpp;
struct componentname * a_cnp;
} */ *ap;
{
struct vnode *dvp = ap->a_dvp;
struct vnode *newvp;
struct vnode *targetdvp;
int error;
int flag = ap->a_cnp->cn_nameiop /*& OPMASK*/;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_lookup(ap->a_dvp = %x->%x, \"%s\", op = %d)\n",
dvp, LOFSVP(dvp), ap->a_cnp->cn_nameptr, flag);
#endif
/*
* (ap->a_dvp) was locked when passed in, and it will be replaced
* with the target vnode, BUT that will already have been
* locked when (ap->a_dvp) was locked [see lofs_lock]. all that
* must be done here is to keep track of reference counts.
*/
targetdvp = LOFSVP(dvp);
/*VREF(targetdvp);*/
#ifdef LOFS_DIAGNOSTIC
vprint("lofs VOP_LOOKUP", targetdvp);
#endif
/*
* Call lookup on the looped vnode
*/
error = VOP_LOOKUP(targetdvp, &newvp, ap->a_cnp);
/*vrele(targetdvp);*/
if (error) {
*ap->a_vpp = NULLVP;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_lookup(%x->%x) = %d\n", dvp, LOFSVP(dvp), error);
#endif
return (error);
}
#ifdef LOFS_DIAGNOSTIC
printf("lofs_lookup(%x->%x) = OK\n", dvp, LOFSVP(dvp));
#endif
*ap->a_vpp = newvp;
/*
* If we just found a directory then make
* a loopback node for it and return the loopback
* instead of the real vnode. Otherwise simply
* return the aliased directory and vnode.
*/
if (newvp && newvp->v_type == VDIR && flag == LOOKUP) {
#ifdef LOFS_DIAGNOSTIC
printf("lofs_lookup: found VDIR\n");
#endif
/*
* At this point, newvp is the vnode to be looped.
* Activate a loopback and return the looped vnode.
*/
return (make_lofs(dvp->v_mount, ap->a_vpp));
}
#ifdef LOFS_DIAGNOSTIC
printf("lofs_lookup: not VDIR\n");
#endif
return (0);
}
/*
* this = ni_dvp
* ni_dvp references the locked directory.
* ni_vp is NULL.
*/
lofs_mknod(ap)
struct vop_mknod_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_mknod(vp = %x->%x)\n", ap->a_dvp, LOFSVP(ap->a_dvp));
#endif
PUSHREF(xdvp, ap->a_dvp);
VREF(ap->a_dvp);
error = VOP_MKNOD(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
POP(xdvp, ap->a_dvp);
vrele(ap->a_dvp);
return (error);
}
/*
* this = ni_dvp;
* ni_dvp references the locked directory
* ni_vp is NULL.
*/
lofs_create(ap)
struct vop_create_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_create(ap->a_dvp = %x->%x)\n", ap->a_dvp, LOFSVP(ap->a_dvp));
#endif
PUSHREF(xdvp, ap->a_dvp);
VREF(ap->a_dvp);
error = VOP_CREATE(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
POP(xdvp, ap->a_dvp);
vrele(ap->a_dvp);
#ifdef LOFS_DIAGNOSTIC
printf("lofs_create(ap->a_dvp = %x->%x)\n", ap->a_dvp, LOFSVP(ap->a_dvp));
#endif
return (error);
}
lofs_open(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_open(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_OPEN(LOFSVP(ap->a_vp), ap->a_mode, ap->a_cred, ap->a_p);
}
lofs_close(ap)
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_close(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_CLOSE(LOFSVP(ap->a_vp), ap->a_fflag, ap->a_cred, ap->a_p);
}
lofs_access(ap)
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_access(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_ACCESS(LOFSVP(ap->a_vp), ap->a_mode, ap->a_cred, ap->a_p);
}
lofs_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_getattr(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
/*
* Get the stats from the underlying filesystem
*/
error = VOP_GETATTR(LOFSVP(ap->a_vp), ap->a_vap, ap->a_cred, ap->a_p);
if (error)
return (error);
/*
* and replace the fsid field with the loopback number
* to preserve the namespace.
*/
ap->a_vap->va_fsid = ap->a_vp->v_mount->mnt_stat.f_fsid.val[0];
return (0);
}
lofs_setattr(ap)
struct vop_setattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_setattr(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_SETATTR(LOFSVP(ap->a_vp), ap->a_vap, ap->a_cred, ap->a_p);
}
lofs_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_read(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_READ(LOFSVP(ap->a_vp), ap->a_uio, ap->a_ioflag, ap->a_cred);
}
lofs_write(ap)
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_write(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_WRITE(LOFSVP(ap->a_vp), ap->a_uio, ap->a_ioflag, ap->a_cred);
}
lofs_ioctl(ap)
struct vop_ioctl_args /* {
struct vnode *a_vp;
int a_command;
caddr_t a_data;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_ioctl(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_IOCTL(LOFSVP(ap->a_vp), ap->a_command, ap->a_data, ap->a_fflag, ap->a_cred, ap->a_p);
}
lofs_select(ap)
struct vop_select_args /* {
struct vnode *a_vp;
int a_which;
int a_fflags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_select(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_SELECT(LOFSVP(ap->a_vp), ap->a_which, ap->a_fflags, ap->a_cred, ap->a_p);
}
lofs_mmap(ap)
struct vop_mmap_args /* {
struct vnode *a_vp;
int a_fflags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_mmap(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_MMAP(LOFSVP(ap->a_vp), ap->a_fflags, ap->a_cred, ap->a_p);
}
lofs_fsync(ap)
struct vop_fsync_args /* {
struct vnode *a_vp;
struct ucred *a_cred;
int a_waitfor;
struct proc *a_p;
} */ *ap;
{
struct vnode *targetvp = LOFSVP(ap->a_vp);
#ifdef LOFS_DIAGNOSTIC
printf("lofs_fsync(ap->a_vp = %x->%x)\n", ap->a_vp, targetvp);
#endif
if (targetvp)
return VOP_FSYNC(targetvp, ap->a_cred, ap->a_waitfor, ap->a_p);
return (0);
}
lofs_seek(ap)
struct vop_seek_args /* {
struct vnode *a_vp;
off_t a_oldoff;
off_t a_newoff;
struct ucred *a_cred;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_seek(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_SEEK(LOFSVP(ap->a_vp), ap->a_oldoff, ap->a_newoff, ap->a_cred);
}
lofs_remove(ap)
struct vop_remove_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap;
{
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_remove(ap->a_vp = %x->%x)\n", ap->a_dvp, LOFSVP(ap->a_dvp));
#endif
PUSHREF(xdvp, ap->a_dvp);
VREF(ap->a_dvp);
PUSHREF(xvp, ap->a_vp);
VREF(ap->a_vp);
error = VOP_REMOVE(ap->a_dvp, ap->a_vp, ap->a_cnp);
POP(xvp, ap->a_vp);
vrele(ap->a_vp);
POP(xdvp, ap->a_dvp);
vrele(ap->a_dvp);
return (error);
}
/*
* vp is this.
* ni_dvp is the locked parent of the target.
* ni_vp is NULL.
*/
lofs_link(ap)
struct vop_link_args /* {
struct vnode *a_vp;
struct vnode *a_tdvp;
struct componentname *a_cnp;
} */ *ap;
{
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_link(ap->a_tdvp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
PUSHREF(xdvp, ap->a_vp);
VREF(ap->a_vp);
error = VOP_LINK(ap->a_vp, LOFSVP(ap->a_tdvp), ap->a_cnp);
POP(xdvp, ap->a_vp);
vrele(ap->a_vp);
return (error);
}
lofs_rename(ap)
struct vop_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;
} */ *ap;
{
struct vnode *fvp, *tvp;
struct vnode *tdvp;
#ifdef notdef
struct vnode *fsvp, *tsvp;
#endif
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename(fdvp = %x->%x)\n", ap->a_fdvp, LOFSVP(ap->a_fdvp));
/*printf("lofs_rename(tdvp = %x->%x)\n", tndp->ni_dvp, LOFSVP(tndp->ni_dvp));*/
#endif
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - switch source dvp\n");
#endif
/*
* Switch source directory to point to lofsed vnode
*/
PUSHREF(fdvp, ap->a_fdvp);
VREF(ap->a_fdvp);
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - switch source vp\n");
#endif
/*
* And source object if it is lofsed...
*/
fvp = ap->a_fvp;
if (fvp && fvp->v_op == lofs_vnodeop_p) {
ap->a_fvp = LOFSVP(fvp);
VREF(ap->a_fvp);
} else {
fvp = 0;
}
#ifdef notdef
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - switch source start vp\n");
#endif
/*
* And source startdir object if it is lofsed...
*/
fsvp = fndp->ni_startdir;
if (fsvp && fsvp->v_op == lofs_vnodeop_p) {
fndp->ni_startdir = LOFSVP(fsvp);
VREF(fndp->ni_startdir);
} else {
fsvp = 0;
}
#endif
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - switch target dvp\n");
#endif
/*
* Switch target directory to point to lofsed vnode
*/
tdvp = ap->a_tdvp;
if (tdvp && tdvp->v_op == lofs_vnodeop_p) {
ap->a_tdvp = LOFSVP(tdvp);
VREF(ap->a_tdvp);
} else {
tdvp = 0;
}
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - switch target vp\n");
#endif
/*
* And target object if it is lofsed...
*/
tvp = ap->a_tvp;
if (tvp && tvp->v_op == lofs_vnodeop_p) {
ap->a_tvp = LOFSVP(tvp);
VREF(ap->a_tvp);
} else {
tvp = 0;
}
#ifdef notdef
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - switch target start vp\n");
#endif
/*
* And target startdir object if it is lofsed...
*/
tsvp = tndp->ni_startdir;
if (tsvp && tsvp->v_op == lofs_vnodeop_p) {
tndp->ni_startdir = LOFSVP(fsvp);
VREF(tndp->ni_startdir);
} else {
tsvp = 0;
}
#endif
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - VOP_RENAME(%x, %x, %x, %x)\n",
ap->a_fdvp, ap->a_fvp, ap->a_tdvp, ap->a_tvp);
vprint("ap->a_fdvp", ap->a_fdvp);
vprint("ap->a_fvp", ap->a_fvp);
vprint("ap->a_tdvp", ap->a_tdvp);
if (ap->a_tvp) vprint("ap->a_tvp", ap->a_tvp);
DELAY(16000000);
#endif
error = VOP_RENAME(ap->a_fdvp, ap->a_fvp, ap->a_fcnp, ap->a_tdvp, ap->a_tvp, ap->a_tcnp);
/*
* Put everything back...
*/
#ifdef notdef
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - restore target startdir\n");
#endif
if (tsvp) {
if (tndp->ni_startdir)
vrele(tndp->ni_startdir);
tndp->ni_startdir = tsvp;
}
#endif
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - restore target vp\n");
#endif
if (tvp) {
ap->a_tvp = tvp;
vrele(ap->a_tvp);
}
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - restore target dvp\n");
#endif
if (tdvp) {
ap->a_tdvp = tdvp;
vrele(ap->a_tdvp);
}
#ifdef notdef
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - restore source startdir\n");
#endif
if (fsvp) {
if (fndp->ni_startdir)
vrele(fndp->ni_startdir);
fndp->ni_startdir = fsvp;
}
#endif
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - restore source vp\n");
#endif
if (fvp) {
ap->a_fvp = fvp;
vrele(ap->a_fvp);
}
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rename - restore source dvp\n");
#endif
POP(fdvp, ap->a_fdvp);
vrele(ap->a_fdvp);
return (error);
}
/*
* ni_dvp is the locked (alias) parent.
* ni_vp is NULL.
*/
lofs_mkdir(ap)
struct vop_mkdir_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
int error;
struct vnode *dvp = ap->a_dvp;
struct vnode *xdvp;
struct vnode *newvp;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_mkdir(vp = %x->%x)\n", dvp, LOFSVP(dvp));
#endif
xdvp = dvp;
dvp = LOFSVP(xdvp);
VREF(dvp);
error = VOP_MKDIR(dvp, &newvp, ap->a_cnp, ap->a_vap);
if (error) {
*ap->a_vpp = NULLVP;
vrele(xdvp);
return (error);
}
/*
* Make a new lofs node
*/
/*VREF(dvp);*/
error = make_lofs(dvp->v_mount, &newvp);
*ap->a_vpp = newvp;
return (error);
}
/*
* ni_dvp is the locked parent.
* ni_vp is the entry to be removed.
*/
lofs_rmdir(ap)
struct vop_rmdir_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_rmdir(dvp = %x->%x)\n", dvp, LOFSVP(dvp));
#endif
PUSHREF(xdvp, dvp);
VREF(dvp);
PUSHREF(xvp, vp);
VREF(vp);
error = VOP_RMDIR(dvp, vp, ap->a_cnp);
POP(xvp, vp);
vrele(vp);
POP(xdvp, dvp);
vrele(dvp);
return (error);
}
/*
* ni_dvp is the locked parent.
* ni_vp is NULL.
*/
lofs_symlink(ap)
struct vop_symlink_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
} */ *ap;
{
int error;
#ifdef LOFS_DIAGNOSTIC
printf("VOP_SYMLINK(vp = %x->%x)\n", ap->a_dvp, LOFSVP(ap->a_dvp));
#endif
PUSHREF(xdvp, ap->a_dvp);
VREF(ap->a_dvp);
error = VOP_SYMLINK(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap, ap->a_target);
POP(xdvp, ap->a_dvp);
vrele(ap->a_dvp);
return (error);
}
lofs_readdir(ap)
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_readdir(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_READDIR(LOFSVP(ap->a_vp), ap->a_uio, ap->a_cred);
}
lofs_readlink(ap)
struct vop_readlink_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_readlink(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_READLINK(LOFSVP(ap->a_vp), ap->a_uio, ap->a_cred);
}
/*
* Anyone's guess...
*/
lofs_abortop(ap)
struct vop_abortop_args /* {
struct vnode *a_dvp;
struct componentname *a_cnp;
} */ *ap;
{
int error;
PUSHREF(xdvp, ap->a_dvp);
error = VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
POP(xdvp, ap->a_dvp);
return (error);
}
lofs_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *targetvp = LOFSVP(ap->a_vp);
#ifdef LOFS_DIAGNOSTIC
printf("lofs_inactive(ap->a_vp = %x->%x)\n", ap->a_vp, targetvp);
#endif
#ifdef DIAGNOSTIC
{ extern int prtactive;
if (prtactive && ap->a_vp->v_usecount != 0)
vprint("lofs_inactive: pushing active", ap->a_vp);
}
#endif
if (targetvp) {
vrele(targetvp);
LOFSP(ap->a_vp)->a_lofsvp = 0;
}
}
lofs_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *targetvp;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_reclaim(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
remque(LOFSP(ap->a_vp));
targetvp = LOFSVP(ap->a_vp);
if (targetvp) {
printf("lofs: delayed vrele of %x\n", targetvp);
vrele(targetvp); /* XXX should never happen */
}
FREE(ap->a_vp->v_data, M_TEMP);
ap->a_vp->v_data = 0;
return (0);
}
lofs_lock(ap)
struct vop_lock_args /* {
struct vnode *a_vp;
} */ *ap;
{
int error;
register struct vnode *vp = ap->a_vp;
struct vnode *targetvp;
while (vp->v_flag & VXLOCK) {
vp->v_flag |= VXWANT;
sleep((caddr_t)vp, PINOD);
}
if (vp->v_tag == VT_NON)
return (ENOENT);
targetvp = LOFSVP(ap->a_vp);
#ifdef LOFS_DIAGNOSTIC
printf("lofs_lock(ap->a_vp = %x->%x)\n", ap->a_vp, targetvp);
/*vprint("lofs_lock ap->a_vp", ap->a_vp);
if (targetvp)
vprint("lofs_lock ->ap->a_vp", targetvp);
else
printf("lofs_lock ->ap->a_vp = NIL\n");*/
#endif
if (targetvp && (error = VOP_LOCK(targetvp)))
return (error);
return (0);
}
lofs_unlock(ap)
struct vop_unlock_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *targetvp = LOFSVP(ap->a_vp);
#ifdef LOFS_DIAGNOSTIC
printf("lofs_unlock(ap->a_vp = %x->%x)\n", ap->a_vp, targetvp);
#endif
if (targetvp)
return (VOP_UNLOCK(targetvp));
return (0);
}
lofs_bmap(ap)
struct vop_bmap_args /* {
struct vnode *a_vp;
daddr_t a_bn;
struct vnode **a_vpp;
daddr_t *a_bnp;
int *a_runp;
} */ *ap;
{
#ifdef LOFS_DIAGNOSTIC
printf("lofs_bmap(ap->a_vp = %x->%x)\n", ap->a_vp, LOFSVP(ap->a_vp));
#endif
return VOP_BMAP(LOFSVP(ap->a_vp), ap->a_bn, ap->a_vpp, ap->a_bnp, ap->a_runp);
}
lofs_strategy(ap)
struct vop_strategy_args /* {
struct buf *a_bp;
} */ *ap;
{
int error;
#ifdef LOFS_DIAGNOSTIC
printf("lofs_strategy(vp = %x->%x)\n", ap->a_bp->b_vp, LOFSVP(ap->a_bp->b_vp));
#endif
PUSHREF(vp, ap->a_bp->b_vp);
error = VOP_STRATEGY(ap->a_bp);
POP(vp, ap->a_bp->b_vp);
return (error);
}
lofs_print(ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *targetvp = LOFSVP(ap->a_vp);
printf("tag VT_LOFS ref ");
if (targetvp)
return (VOP_PRINT(targetvp));
printf("NULLVP\n");
return (0);
}
lofs_islocked(ap)
struct vop_islocked_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *targetvp = LOFSVP(ap->a_vp);
if (targetvp)
return (VOP_ISLOCKED(targetvp));
return (0);
}
lofs_advlock(ap)
struct vop_advlock_args /* {
struct vnode *a_vp;
caddr_t a_id;
int a_op;
struct flock *a_fl;
int a_flags;
} */ *ap;
{
return VOP_ADVLOCK(LOFSVP(ap->a_vp), ap->a_id, ap->a_op, ap->a_fl, ap->a_flags);
}
/*
* LOFS directory offset lookup.
* Currently unsupported.
*/
lofs_blkatoff(ap)
struct vop_blkatoff_args /* {
struct vnode *a_vp;
off_t a_offset;
char **a_res;
struct buf **a_bpp;
} */ *ap;
{
return (EOPNOTSUPP);
}
/*
* LOFS flat namespace allocation.
* Currently unsupported.
*/
lofs_valloc(ap)
struct vop_valloc_args /* {
struct vnode *a_pvp;
int a_mode;
struct ucred *a_cred;
struct vnode **a_vpp;
} */ *ap;
{
return (EOPNOTSUPP);
}
/*
* LOFS flat namespace free.
* Currently unsupported.
*/
/*void*/
lofs_vfree(ap)
struct vop_vfree_args /* {
struct vnode *a_pvp;
ino_t a_ino;
int a_mode;
} */ *ap;
{
return (0);
}
/*
* LOFS file truncation.
*/
lofs_truncate(ap)
struct vop_truncate_args /* {
struct vnode *a_vp;
off_t a_length;
int a_flags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
/* Use lofs_setattr */
printf("lofs_truncate: need to implement!!");
return (EOPNOTSUPP);
}
/*
* LOFS update.
*/
lofs_update(ap)
struct vop_update_args /* {
struct vnode *a_vp;
struct timeval *a_ta;
struct timeval *a_tm;
int a_waitfor;
} */ *ap;
{
/* Use lofs_setattr */
printf("lofs_update: need to implement!!");
return (EOPNOTSUPP);
}
/*
* LOFS bwrite
*/
lofs_bwrite(ap)
struct vop_bwrite_args /* {
struct buf *a_bp;
} */ *ap;
{
return (EOPNOTSUPP);
}
/*
* Global vfs data structures for ufs
*/
int (**lofs_vnodeop_p)();
struct vnodeopv_entry_desc lofs_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, lofs_lookup }, /* lookup */
{ &vop_create_desc, lofs_create }, /* create */
{ &vop_mknod_desc, lofs_mknod }, /* mknod */
{ &vop_open_desc, lofs_open }, /* open */
{ &vop_close_desc, lofs_close }, /* close */
{ &vop_access_desc, lofs_access }, /* access */
{ &vop_getattr_desc, lofs_getattr }, /* getattr */
{ &vop_setattr_desc, lofs_setattr }, /* setattr */
{ &vop_read_desc, lofs_read }, /* read */
{ &vop_write_desc, lofs_write }, /* write */
{ &vop_ioctl_desc, lofs_ioctl }, /* ioctl */
{ &vop_select_desc, lofs_select }, /* select */
{ &vop_mmap_desc, lofs_mmap }, /* mmap */
{ &vop_fsync_desc, lofs_fsync }, /* fsync */
{ &vop_seek_desc, lofs_seek }, /* seek */
{ &vop_remove_desc, lofs_remove }, /* remove */
{ &vop_link_desc, lofs_link }, /* link */
{ &vop_rename_desc, lofs_rename }, /* rename */
{ &vop_mkdir_desc, lofs_mkdir }, /* mkdir */
{ &vop_rmdir_desc, lofs_rmdir }, /* rmdir */
{ &vop_symlink_desc, lofs_symlink }, /* symlink */
{ &vop_readdir_desc, lofs_readdir }, /* readdir */
{ &vop_readlink_desc, lofs_readlink }, /* readlink */
{ &vop_abortop_desc, lofs_abortop }, /* abortop */
{ &vop_inactive_desc, lofs_inactive }, /* inactive */
{ &vop_reclaim_desc, lofs_reclaim }, /* reclaim */
{ &vop_lock_desc, lofs_lock }, /* lock */
{ &vop_unlock_desc, lofs_unlock }, /* unlock */
{ &vop_bmap_desc, lofs_bmap }, /* bmap */
{ &vop_strategy_desc, lofs_strategy }, /* strategy */
{ &vop_print_desc, lofs_print }, /* print */
{ &vop_islocked_desc, lofs_islocked }, /* islocked */
{ &vop_advlock_desc, lofs_advlock }, /* advlock */
{ &vop_blkatoff_desc, lofs_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, lofs_valloc }, /* valloc */
{ &vop_vfree_desc, lofs_vfree }, /* vfree */
{ &vop_truncate_desc, lofs_truncate }, /* truncate */
{ &vop_update_desc, lofs_update }, /* update */
{ &vop_bwrite_desc, lofs_bwrite }, /* bwrite */
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc lofs_vnodeop_opv_desc =
{ &lofs_vnodeop_p, lofs_vnodeop_entries };