633 lines
16 KiB
C
633 lines
16 KiB
C
/*
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department.
|
|
*
|
|
* 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.
|
|
*
|
|
* from: Utah Hdr: vn.c 1.13 94/04/02
|
|
*
|
|
* @(#)vn.c 8.6 (Berkeley) 4/1/94
|
|
*/
|
|
|
|
/*
|
|
* Vnode disk driver.
|
|
*
|
|
* Block/character interface to a vnode. Allows one to treat a file
|
|
* as a disk (e.g. build a filesystem in it, mount it, etc.).
|
|
*
|
|
* NOTE 1: This uses the VOP_BMAP/VOP_STRATEGY interface to the vnode
|
|
* instead of a simple VOP_RDWR. We do this to avoid distorting the
|
|
* local buffer cache.
|
|
*
|
|
* NOTE 2: There is a security issue involved with this driver.
|
|
* Once mounted all access to the contents of the "mapped" file via
|
|
* the special file is controlled by the permissions on the special
|
|
* file, the protection of the mapped file is ignored (effectively,
|
|
* by using root credentials in all transactions).
|
|
*
|
|
* NOTE 3: Doesn't interact with leases, should it?
|
|
*/
|
|
#include "vn.h"
|
|
#if NVN > 0
|
|
|
|
/* default is to have 8 VN's */
|
|
#if NVN < 8
|
|
#undef NVN
|
|
#define NVN 8
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/file.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/disklabel.h>
|
|
#include <sys/diskslice.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <miscfs/specfs/specdev.h>
|
|
|
|
#include <sys/vnioctl.h>
|
|
|
|
#ifdef DEBUG
|
|
int dovncluster = 1;
|
|
int vndebug = 0x00;
|
|
#define VDB_FOLLOW 0x01
|
|
#define VDB_INIT 0x02
|
|
#define VDB_IO 0x04
|
|
#endif
|
|
|
|
#define vnunit(dev) dkunit(dev)
|
|
|
|
#define getvnbuf() \
|
|
((struct buf *)malloc(sizeof(struct buf), M_DEVBUF, M_WAITOK))
|
|
|
|
#define putvnbuf(bp) \
|
|
free((caddr_t)(bp), M_DEVBUF)
|
|
|
|
struct vn_softc {
|
|
int sc_flags; /* flags */
|
|
size_t sc_size; /* size of vn */
|
|
struct vnode *sc_vp; /* vnode */
|
|
struct ucred *sc_cred; /* credentials */
|
|
int sc_maxactive; /* max # of active requests */
|
|
struct buf sc_tab; /* transfer queue */
|
|
u_long sc_options; /* options */
|
|
struct diskslices *sc_slices;
|
|
};
|
|
|
|
/* sc_flags */
|
|
#define VNF_INITED 0x01
|
|
|
|
struct vn_softc *vn_softc[NVN];
|
|
u_long vn_options;
|
|
|
|
#define IFOPT(vn,opt) if (((vn)->sc_options|vn_options) & (opt))
|
|
|
|
/*
|
|
* XXX these decls should be static (without __P(())) or elsewhere.
|
|
*/
|
|
int vnclose __P((dev_t dev, int flags, int mode, struct proc *p));
|
|
int vnopen __P((dev_t dev, int flags, int mode, struct proc *p));
|
|
void vnstrategy __P((struct buf *bp));
|
|
void vnstart __P((struct vn_softc *vn));
|
|
void vniodone __P((struct buf *bp));
|
|
int vnioctl __P((dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p));
|
|
int vnsetcred __P((struct vn_softc *vn, struct ucred *cred));
|
|
void vnthrottle __P((struct vn_softc *vn, struct vnode *vp));
|
|
void vnshutdown __P((void));
|
|
void vnclear __P((struct vn_softc *vn));
|
|
size_t vnsize __P((dev_t dev));
|
|
int vndump __P((dev_t dev));
|
|
|
|
int
|
|
vnclose(dev_t dev, int flags, int mode, struct proc *p)
|
|
{
|
|
struct vn_softc *vn = vn_softc[vnunit(dev)];
|
|
|
|
IFOPT(vn, VN_LABELS)
|
|
if (vn->sc_slices != NULL)
|
|
dsclose(dev, mode, vn->sc_slices);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vnopen(dev_t dev, int flags, int mode, struct proc *p)
|
|
{
|
|
int unit = vnunit(dev),size;
|
|
struct vn_softc *vn;
|
|
|
|
if (unit >= NVN) {
|
|
if (vn_options & VN_FOLLOW)
|
|
printf("vnopen(0x%lx, 0x%x, 0x%x, %p)\n",
|
|
dev, flags, mode, p);
|
|
return(ENOENT);
|
|
}
|
|
|
|
vn = vn_softc[unit];
|
|
if (!vn) {
|
|
vn = malloc(sizeof *vn, M_DEVBUF, M_WAITOK);
|
|
if (!vn)
|
|
return (ENOMEM);
|
|
bzero(vn, sizeof *vn);
|
|
vn_softc[unit] = vn;
|
|
}
|
|
|
|
IFOPT(vn, VN_FOLLOW)
|
|
printf("vnopen(0x%lx, 0x%x, 0x%x, %p)\n", dev, flags, mode, p);
|
|
|
|
IFOPT(vn, VN_LABELS) {
|
|
if (vn->sc_flags & VNF_INITED) {
|
|
struct disklabel label;
|
|
|
|
/* Build label for whole disk. */
|
|
bzero(&label, sizeof label);
|
|
label.d_secsize = DEV_BSIZE;
|
|
label.d_nsectors = 32;
|
|
label.d_ntracks = 64;
|
|
label.d_ncylinders = vn->sc_size / (32 * 64);
|
|
label.d_secpercyl = 32 * 64;
|
|
label.d_secperunit =
|
|
label.d_partitions[RAW_PART].p_size =
|
|
vn->sc_size;
|
|
|
|
return (dsopen("vn", dev, mode, &vn->sc_slices, &label,
|
|
vnstrategy, (ds_setgeom_t *)NULL));
|
|
}
|
|
if (dkslice(dev) != WHOLE_DISK_SLICE ||
|
|
dkpart(dev) != RAW_PART ||
|
|
mode != S_IFCHR)
|
|
return (ENXIO);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Break the request into bsize pieces and submit using VOP_BMAP/VOP_STRATEGY.
|
|
* Note that this driver can only be used for swapping over NFS on the hp
|
|
* since nfs_strategy on the vax cannot handle u-areas and page tables.
|
|
*/
|
|
void
|
|
vnstrategy(struct buf *bp)
|
|
{
|
|
int unit = vnunit(bp->b_dev);
|
|
register struct vn_softc *vn = vn_softc[unit];
|
|
register struct buf *nbp;
|
|
register int bn, bsize, resid;
|
|
register caddr_t addr;
|
|
int sz, flags, error;
|
|
|
|
IFOPT(vn, VN_DEBUG)
|
|
printf("vnstrategy(%p): unit %d\n", bp, unit);
|
|
|
|
if ((vn->sc_flags & VNF_INITED) == 0) {
|
|
bp->b_error = ENXIO;
|
|
bp->b_flags |= B_ERROR;
|
|
biodone(bp);
|
|
return;
|
|
}
|
|
IFOPT(vn, VN_LABELS) {
|
|
bp->b_resid = bp->b_bcount;/* XXX best place to set this? */
|
|
if (vn->sc_slices != NULL && dscheck(bp, vn->sc_slices) <= 0) {
|
|
biodone(bp);
|
|
return;
|
|
}
|
|
bn = bp->b_pblkno;
|
|
bp->b_resid = bp->b_bcount;/* XXX best place to set this? */
|
|
} else {
|
|
bn = bp->b_blkno;
|
|
sz = howmany(bp->b_bcount, DEV_BSIZE);
|
|
bp->b_resid = bp->b_bcount;
|
|
if (bn < 0 || bn + sz > vn->sc_size) {
|
|
if (bn != vn->sc_size) {
|
|
bp->b_error = EINVAL;
|
|
bp->b_flags |= B_ERROR;
|
|
}
|
|
biodone(bp);
|
|
return;
|
|
}
|
|
}
|
|
bn = dbtob(bn);
|
|
bsize = vn->sc_vp->v_mount->mnt_stat.f_iosize;
|
|
addr = bp->b_data;
|
|
flags = bp->b_flags | B_CALL;
|
|
for (resid = bp->b_resid; resid; resid -= sz) {
|
|
struct vnode *vp;
|
|
daddr_t nbn; /* YYY - bn was int !? */
|
|
int off, s, nra;
|
|
|
|
nra = 0;
|
|
error = VOP_BMAP(vn->sc_vp, bn / bsize, &vp, &nbn, &nra);
|
|
if (error == 0 && (long)nbn == -1)
|
|
error = EIO;
|
|
|
|
IFOPT(vn, VN_DONTCLUSTER)
|
|
nra = 0;
|
|
|
|
off = bn % bsize;
|
|
if (off)
|
|
sz = bsize - off;
|
|
else
|
|
sz = (1 + nra) * bsize;
|
|
if (resid < sz)
|
|
sz = resid;
|
|
|
|
IFOPT(vn,VN_IO)
|
|
printf("vnstrategy: vp %p/%p bn 0x%x/0x%lx sz 0x%x\n",
|
|
vn->sc_vp, vp, bn, nbn, sz);
|
|
|
|
nbp = getvnbuf();
|
|
nbp->b_flags = flags;
|
|
nbp->b_bcount = sz;
|
|
nbp->b_bufsize = sz;
|
|
nbp->b_error = 0;
|
|
if (vp->v_type == VBLK || vp->v_type == VCHR)
|
|
nbp->b_dev = vp->v_rdev;
|
|
else
|
|
nbp->b_dev = NODEV;
|
|
nbp->b_data = addr;
|
|
nbp->b_blkno = nbn + btodb(off);
|
|
nbp->b_proc = bp->b_proc;
|
|
nbp->b_iodone = vniodone;
|
|
nbp->b_vp = vp;
|
|
nbp->b_pfcent = (int) bp; /* XXX */
|
|
nbp->b_rcred = vn->sc_cred; /* XXX crdup? */
|
|
nbp->b_wcred = vn->sc_cred; /* XXX crdup? */
|
|
nbp->b_dirtyoff = bp->b_dirtyoff;
|
|
nbp->b_dirtyend = bp->b_dirtyend;
|
|
nbp->b_validoff = bp->b_validoff;
|
|
nbp->b_validend = bp->b_validend;
|
|
/*
|
|
* If there was an error or a hole in the file...punt.
|
|
* Note that we deal with this after the nbp allocation.
|
|
* This ensures that we properly clean up any operations
|
|
* that we have already fired off.
|
|
*
|
|
* XXX we could deal with holes here but it would be
|
|
* a hassle (in the write case).
|
|
*/
|
|
if (error) {
|
|
nbp->b_error = error;
|
|
nbp->b_flags |= B_ERROR;
|
|
bp->b_resid -= (resid - sz);
|
|
biodone(nbp);
|
|
return;
|
|
}
|
|
/*
|
|
* Just sort by block number
|
|
*/
|
|
/*
|
|
* XXX sort at all? The lowest layer should repeat the sort.
|
|
*/
|
|
#define b_cylinder b_resid /* XXX */
|
|
nbp->b_cylinder = nbp->b_blkno;
|
|
s = splbio();
|
|
disksort(&vn->sc_tab, nbp);
|
|
if (vn->sc_tab.b_active < vn->sc_maxactive) {
|
|
vn->sc_tab.b_active++;
|
|
vnstart(vn);
|
|
}
|
|
splx(s);
|
|
bn += sz;
|
|
addr += sz;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Feed requests sequentially.
|
|
* We do it this way to keep from flooding NFS servers if we are connected
|
|
* to an NFS file. This places the burden on the client rather than the
|
|
* server.
|
|
*/
|
|
void
|
|
vnstart(struct vn_softc *vn)
|
|
{
|
|
register struct buf *bp;
|
|
|
|
/*
|
|
* Dequeue now since lower level strategy routine might
|
|
* queue using same links
|
|
*/
|
|
bp = vn->sc_tab.b_actf;
|
|
vn->sc_tab.b_actf = bp->b_actf;
|
|
IFOPT(vn, VN_IO)
|
|
printf("vnstart(%d): bp %p vp %p blkno 0x%lx addr %p cnt 0x%lx\n",
|
|
0, bp, bp->b_vp, bp->b_blkno, bp->b_data,
|
|
bp->b_bcount);
|
|
if ((bp->b_flags & B_READ) == 0)
|
|
bp->b_vp->v_numoutput++;
|
|
VOP_STRATEGY(bp);
|
|
}
|
|
|
|
void
|
|
vniodone(struct buf *bp)
|
|
{
|
|
register struct buf *pbp = (struct buf *)bp->b_pfcent; /* XXX */
|
|
register struct vn_softc *vn = vn_softc[vnunit(pbp->b_dev)];
|
|
int s;
|
|
|
|
s = splbio();
|
|
|
|
IFOPT(vn, VN_IO)
|
|
printf("vniodone(%d): bp %p vp %p blkno 0x%lx addr %p cnt 0x%lx\n",
|
|
0, bp, bp->b_vp, bp->b_blkno, bp->b_data,
|
|
bp->b_bcount);
|
|
|
|
if (bp->b_error) {
|
|
IFOPT(vn, VN_IO)
|
|
printf("vniodone: bp %p error %d\n", bp, bp->b_error);
|
|
pbp->b_flags |= B_ERROR;
|
|
pbp->b_error = biowait(bp);
|
|
}
|
|
pbp->b_resid -= bp->b_bcount;
|
|
putvnbuf(bp);
|
|
if (pbp->b_resid == 0) {
|
|
IFOPT(vn, VN_IO)
|
|
printf("vniodone: pbp %p iodone\n", pbp);
|
|
biodone(pbp);
|
|
}
|
|
if (vn->sc_tab.b_actf)
|
|
vnstart(vn);
|
|
else
|
|
vn->sc_tab.b_active--;
|
|
splx(s);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
vnioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
|
|
{
|
|
struct vn_softc *vn = vn_softc[vnunit(dev)];
|
|
struct vn_ioctl *vio;
|
|
struct vattr vattr;
|
|
struct nameidata nd;
|
|
int error;
|
|
u_long *f;
|
|
|
|
|
|
IFOPT(vn,VN_FOLLOW)
|
|
printf("vnioctl(0x%lx, 0x%lx, %p, 0x%x, %p): unit %d\n",
|
|
dev, cmd, data, flag, p, vnunit(dev));
|
|
|
|
switch (cmd) {
|
|
case VNIOCATTACH:
|
|
case VNIOCDETACH:
|
|
case VNIOCGSET:
|
|
case VNIOCGCLEAR:
|
|
case VNIOCUSET:
|
|
case VNIOCUCLEAR:
|
|
goto vn_specific;
|
|
}
|
|
|
|
IFOPT(vn,VN_LABELS) {
|
|
if (vn->sc_slices != NULL) {
|
|
error = dsioctl(dev, cmd, data, flag, vn->sc_slices,
|
|
vnstrategy, (ds_setgeom_t *)NULL);
|
|
if (error != -1)
|
|
return (error);
|
|
}
|
|
if (dkslice(dev) != WHOLE_DISK_SLICE ||
|
|
dkpart(dev) != RAW_PART)
|
|
return (ENOTTY);
|
|
}
|
|
|
|
vn_specific:
|
|
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
|
|
vio = (struct vn_ioctl *)data;
|
|
f = (u_long*)data;
|
|
switch (cmd) {
|
|
|
|
case VNIOCATTACH:
|
|
if (vn->sc_flags & VNF_INITED)
|
|
return(EBUSY);
|
|
/*
|
|
* Always open for read and write.
|
|
* This is probably bogus, but it lets vn_open()
|
|
* weed out directories, sockets, etc. so we don't
|
|
* have to worry about them.
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, vio->vn_file, p);
|
|
error = vn_open(&nd, FREAD|FWRITE, 0);
|
|
if (error)
|
|
return(error);
|
|
error = VOP_GETATTR(nd.ni_vp, &vattr, p->p_ucred, p);
|
|
if (error) {
|
|
VOP_UNLOCK(nd.ni_vp);
|
|
(void) vn_close(nd.ni_vp, FREAD|FWRITE, p->p_ucred, p);
|
|
return(error);
|
|
}
|
|
VOP_UNLOCK(nd.ni_vp);
|
|
vn->sc_vp = nd.ni_vp;
|
|
vn->sc_size = btodb(vattr.va_size); /* note truncation */
|
|
error = vnsetcred(vn, p->p_ucred);
|
|
if (error) {
|
|
(void) vn_close(nd.ni_vp, FREAD|FWRITE, p->p_ucred, p);
|
|
return(error);
|
|
}
|
|
vnthrottle(vn, vn->sc_vp);
|
|
vio->vn_size = dbtob(vn->sc_size);
|
|
vn->sc_flags |= VNF_INITED;
|
|
IFOPT(vn, VN_LABELS) {
|
|
/*
|
|
* Reopen so that `ds' knows which devices are open.
|
|
* If this is the first VNIOCSET, then we've
|
|
* guaranteed that the device is the cdev and that
|
|
* no other slices or labels are open. Otherwise,
|
|
* we rely on VNIOCCLR not being abused.
|
|
*/
|
|
error = vnopen(dev, flag, S_IFCHR, p);
|
|
if (error)
|
|
vnclear(vn);
|
|
}
|
|
IFOPT(vn, VN_FOLLOW)
|
|
printf("vnioctl: SET vp %p size %x\n",
|
|
vn->sc_vp, vn->sc_size);
|
|
break;
|
|
|
|
case VNIOCDETACH:
|
|
if ((vn->sc_flags & VNF_INITED) == 0)
|
|
return(ENXIO);
|
|
/*
|
|
* XXX handle i/o in progress. Return EBUSY, or wait, or
|
|
* flush the i/o.
|
|
* XXX handle multiple opens of the device. Return EBUSY,
|
|
* or revoke the fd's.
|
|
* How are these problems handled for removable and failing
|
|
* hardware devices?
|
|
*/
|
|
vnclear(vn);
|
|
IFOPT(vn, VN_FOLLOW)
|
|
printf("vnioctl: CLRed\n");
|
|
break;
|
|
|
|
case VNIOCGSET:
|
|
vn_options |= *f;
|
|
*f = vn_options;
|
|
break;
|
|
|
|
case VNIOCGCLEAR:
|
|
vn_options &= ~(*f);
|
|
*f = vn_options;
|
|
break;
|
|
|
|
case VNIOCUSET:
|
|
vn->sc_options |= *f;
|
|
*f = vn->sc_options;
|
|
break;
|
|
|
|
case VNIOCUCLEAR:
|
|
vn->sc_options &= ~(*f);
|
|
*f = vn->sc_options;
|
|
break;
|
|
|
|
default:
|
|
return (ENOTTY);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Duplicate the current processes' credentials. Since we are called only
|
|
* as the result of a SET ioctl and only root can do that, any future access
|
|
* to this "disk" is essentially as root. Note that credentials may change
|
|
* if some other uid can write directly to the mapped file (NFS).
|
|
*/
|
|
int
|
|
vnsetcred(struct vn_softc *vn, struct ucred *cred)
|
|
{
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
char *tmpbuf;
|
|
int error;
|
|
|
|
vn->sc_cred = crdup(cred);
|
|
tmpbuf = malloc(DEV_BSIZE, M_TEMP, M_WAITOK);
|
|
|
|
/* XXX: Horrible kludge to establish credentials for NFS */
|
|
aiov.iov_base = tmpbuf;
|
|
aiov.iov_len = min(DEV_BSIZE, dbtob(vn->sc_size));
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
auio.uio_resid = aiov.iov_len;
|
|
error = VOP_READ(vn->sc_vp, &auio, 0, vn->sc_cred);
|
|
|
|
free(tmpbuf, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set maxactive based on FS type
|
|
*/
|
|
void
|
|
vnthrottle(struct vn_softc *vn, struct vnode *vp)
|
|
{
|
|
#if 0
|
|
extern int (**nfsv2_vnodeop_p)();
|
|
|
|
if (vp->v_op == nfsv2_vnodeop_p)
|
|
vn->sc_maxactive = 2;
|
|
else
|
|
#endif
|
|
vn->sc_maxactive = 8;
|
|
|
|
if (vn->sc_maxactive < 1)
|
|
vn->sc_maxactive = 1;
|
|
}
|
|
|
|
void
|
|
vnshutdown()
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NVN; i++)
|
|
if (vn_softc[i] && vn_softc[i]->sc_flags & VNF_INITED)
|
|
vnclear(vn_softc[i]);
|
|
}
|
|
|
|
TEXT_SET(cleanup_set, vnshutdown);
|
|
|
|
void
|
|
vnclear(struct vn_softc *vn)
|
|
{
|
|
register struct vnode *vp = vn->sc_vp;
|
|
struct proc *p = curproc; /* XXX */
|
|
|
|
IFOPT(vn, VN_FOLLOW)
|
|
printf("vnclear(%p): vp=%p\n", vn, vp);
|
|
vn->sc_flags &= ~VNF_INITED;
|
|
if (vp == (struct vnode *)0)
|
|
panic("vnclear: null vp");
|
|
(void) vn_close(vp, FREAD|FWRITE, vn->sc_cred, p);
|
|
crfree(vn->sc_cred);
|
|
vn->sc_vp = (struct vnode *)0;
|
|
vn->sc_cred = (struct ucred *)0;
|
|
vn->sc_size = 0;
|
|
IFOPT(vn, VN_LABELS)
|
|
if (vn->sc_slices != NULL)
|
|
dsgone(&vn->sc_slices);
|
|
}
|
|
|
|
size_t
|
|
vnsize(dev_t dev)
|
|
{
|
|
int unit = vnunit(dev);
|
|
|
|
if (unit >= NVN || (!vn_softc[unit]) ||
|
|
(vn_softc[unit]->sc_flags & VNF_INITED) == 0)
|
|
return(-1);
|
|
return(vn_softc[unit]->sc_size);
|
|
}
|
|
|
|
int
|
|
vndump(dev_t dev)
|
|
{
|
|
return (ENODEV);
|
|
}
|
|
#endif
|