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freebsd-nq/sys/isofs/cd9660/cd9660_vfsops.c
Joerg Wunsch 7301b27b15 Properly clean out the SI_MOUNTEDON flag iff the mount attempt fails 
half the way down.  Otherwise, further attempts to mount the device
will be rejected with BUSY.

IMHO, this flag can completely go away for cd9660.  There's no reason
you need to prevent CDs from being mounted multiple times, and in case
of multisession CDs it can even make sense to mount two different
sessions by the same time (to different mount points, otherwise it
would be pointless ;).
1997-12-21 21:40:02 +00:00

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/*-
* Copyright (c) 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley
* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
* Support code is derived from software contributed to Berkeley
* by Atsushi Murai (amurai@spec.co.jp).
*
* 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.
*
* @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
* $Id: cd9660_vfsops.c,v 1.32 1997/11/07 08:52:51 phk Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <miscfs/specfs/specdev.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/cdio.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/iso_rrip.h>
#include <isofs/cd9660/cd9660_node.h>
#include <isofs/cd9660/cd9660_mount.h>
MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
static int cd9660_mount __P((struct mount *,
char *, caddr_t, struct nameidata *, struct proc *));
static int cd9660_start __P((struct mount *, int, struct proc *));
static int cd9660_unmount __P((struct mount *, int, struct proc *));
static int cd9660_root __P((struct mount *, struct vnode **));
static int cd9660_quotactl __P((struct mount *, int, uid_t, caddr_t,
struct proc *));
static int cd9660_statfs __P((struct mount *, struct statfs *, struct proc *));
static int cd9660_sync __P((struct mount *, int, struct ucred *,
struct proc *));
static int cd9660_vget __P((struct mount *, ino_t, struct vnode **));
static int cd9660_fhtovp __P((struct mount *, struct fid *, struct sockaddr *,
struct vnode **, int *, struct ucred **));
static int cd9660_vptofh __P((struct vnode *, struct fid *));
static struct vfsops cd9660_vfsops = {
cd9660_mount,
cd9660_start,
cd9660_unmount,
cd9660_root,
cd9660_quotactl,
cd9660_statfs,
cd9660_sync,
cd9660_vget,
cd9660_fhtovp,
cd9660_vptofh,
cd9660_init
};
VFS_SET(cd9660_vfsops, cd9660, MOUNT_CD9660, VFCF_READONLY);
/*
* Called by vfs_mountroot when iso is going to be mounted as root.
*/
static int iso_get_ssector __P((dev_t dev, struct proc *p));
static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
struct proc *p, struct iso_args *argp));
static int iso_mountroot __P((struct mount *mp, struct proc *p));
/*
* Try to find the start of the last data track on this CD-ROM. This
* is used to mount the last session of a multi-session CD. Bail out
* and return 0 if we fail, this is always a safe bet.
*/
static int
iso_get_ssector(dev, p)
dev_t dev;
struct proc *p;
{
struct ioc_toc_header h;
struct ioc_read_toc_single_entry t;
int i;
struct bdevsw *bd;
d_ioctl_t *ioctlp;
bd = bdevsw[major(dev)];
ioctlp = bd->d_ioctl;
if (ioctlp == NULL)
return 0;
if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, p) == -1)
return 0;
for (i = h.ending_track; i >= 0; i--) {
t.address_format = CD_LBA_FORMAT;
t.track = i;
if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, p) == -1)
return 0;
if ((t.entry.control & 4) != 0)
/* found a data track */
break;
}
if (i < 0)
return 0;
return ntohl(t.entry.addr.lba);
}
static int
iso_mountroot(mp, p)
struct mount *mp;
struct proc *p;
{
struct iso_args args;
int error;
if ((error = bdevvp(rootdev, &rootvp))) {
printf("iso_mountroot: can't find rootvp");
return (error);
}
args.flags = ISOFSMNT_ROOT;
args.ssector = iso_get_ssector(rootdev, p);
if (bootverbose)
printf("iso_mountroot(): using session at block %d\n",
args.ssector);
if (error = iso_mountfs(rootvp, mp, p, &args))
return (error);
(void)cd9660_statfs(mp, &mp->mnt_stat, p);
return (0);
}
/*
* VFS Operations.
*
* mount system call
*/
static int
cd9660_mount(mp, path, data, ndp, p)
register struct mount *mp;
char *path;
caddr_t data;
struct nameidata *ndp;
struct proc *p;
{
struct vnode *devvp;
struct iso_args args;
u_int size;
int error;
struct iso_mnt *imp = 0;
if ((mp->mnt_flag & MNT_ROOTFS) != 0) {
if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERR)
mp->mnt_flag |= MNT_NOCLUSTERR;
return (iso_mountroot(mp, p));
}
if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
return (error);
if ((mp->mnt_flag & MNT_RDONLY) == 0)
return (EROFS);
/*
* If updating, check whether changing from read-only to
* read/write; if there is no device name, that's all we do.
* Disallow clearing MNT_NOCLUSTERR flag, if block device requests.
*/
if (mp->mnt_flag & MNT_UPDATE) {
imp = VFSTOISOFS(mp);
if (bdevsw[major(imp->im_devvp->v_rdev)]->d_flags &
D_NOCLUSTERR)
mp->mnt_flag |= MNT_NOCLUSTERR;
if (args.fspec == 0)
return (vfs_export(mp, &imp->im_export, &args.export));
}
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
if ((error = namei(ndp)))
return (error);
devvp = ndp->ni_vp;
if (devvp->v_type != VBLK) {
vrele(devvp);
return ENOTBLK;
}
if (major(devvp->v_rdev) >= nblkdev) {
vrele(devvp);
return ENXIO;
}
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERR)
mp->mnt_flag |= MNT_NOCLUSTERR;
error = iso_mountfs(devvp, mp, p, &args);
} else {
if (devvp != imp->im_devvp)
error = EINVAL; /* needs translation */
else
vrele(devvp);
}
if (error) {
vrele(devvp);
return error;
}
imp = VFSTOISOFS(mp);
(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
&size);
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
(void) cd9660_statfs(mp, &mp->mnt_stat, p);
return 0;
}
/*
* Common code for mount and mountroot
*/
static int
iso_mountfs(devvp, mp, p, argp)
register struct vnode *devvp;
struct mount *mp;
struct proc *p;
struct iso_args *argp;
{
register struct iso_mnt *isomp = (struct iso_mnt *)0;
struct buf *bp = NULL;
dev_t dev = devvp->v_rdev;
int error = EINVAL;
int needclose = 0;
int high_sierra = 0;
int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
int iso_bsize;
int iso_blknum;
struct iso_volume_descriptor *vdp = 0;
struct iso_primary_descriptor *pri;
struct iso_sierra_primary_descriptor *pri_sierra;
struct iso_directory_record *rootp;
int logical_block_size;
if (!ronly)
return EROFS;
/*
* Disallow multiple mounts of the same device.
* Disallow mounting of a device that is currently in use
* (except for root, which might share swap device for miniroot).
* Flush out any old buffers remaining from a previous use.
*/
if ((error = vfs_mountedon(devvp)))
return error;
if (vcount(devvp) > 1 && devvp != rootvp)
return EBUSY;
if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)))
return (error);
if ((error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)))
return error;
needclose = 1;
/* This is the "logical sector size". The standard says this
* should be 2048 or the physical sector size on the device,
* whichever is greater. For now, we'll just use a constant.
*/
iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
for (iso_blknum = 16 + argp->ssector;
iso_blknum < 100 + argp->ssector;
iso_blknum++) {
if (error = bread(devvp, iso_blknum * btodb(iso_bsize),
iso_bsize, NOCRED, &bp))
goto out;
vdp = (struct iso_volume_descriptor *)bp->b_data;
if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
sizeof vdp->id) != 0) {
error = EINVAL;
goto out;
} else
high_sierra = 1;
}
if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_END) {
error = EINVAL;
goto out;
}
if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_PRIMARY)
break;
brelse(bp);
}
if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) != ISO_VD_PRIMARY) {
error = EINVAL;
goto out;
}
pri = (struct iso_primary_descriptor *)vdp;
pri_sierra = (struct iso_sierra_primary_descriptor *)vdp;
logical_block_size =
isonum_723 (high_sierra?
pri_sierra->logical_block_size:
pri->logical_block_size);
if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
|| (logical_block_size & (logical_block_size - 1)) != 0) {
error = EINVAL;
goto out;
}
rootp = (struct iso_directory_record *)
(high_sierra?
pri_sierra->root_directory_record:
pri->root_directory_record);
isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
bzero((caddr_t)isomp, sizeof *isomp);
isomp->logical_block_size = logical_block_size;
isomp->volume_space_size =
isonum_733 (high_sierra?
pri_sierra->volume_space_size:
pri->volume_space_size);
/*
* Since an ISO9660 multi-session CD can also access previous
* sessions, we have to include them into the space consider-
* ations. This doesn't yield a very accurate number since
* parts of the old sessions might be inaccessible now, but we
* can't do much better. This is also important for the NFS
* filehandle validation.
*/
isomp->volume_space_size += argp->ssector;
bcopy (rootp, isomp->root, sizeof isomp->root);
isomp->root_extent = isonum_733 (rootp->extent);
isomp->root_size = isonum_733 (rootp->size);
isomp->im_bmask = logical_block_size - 1;
isomp->im_bshift = 0;
while ((1 << isomp->im_bshift) < isomp->logical_block_size)
isomp->im_bshift++;
bp->b_flags |= B_AGE;
brelse(bp);
bp = NULL;
mp->mnt_data = (qaddr_t)isomp;
mp->mnt_stat.f_fsid.val[0] = (long)dev;
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
mp->mnt_maxsymlinklen = 0;
mp->mnt_flag |= MNT_LOCAL;
isomp->im_mountp = mp;
isomp->im_dev = dev;
isomp->im_devvp = devvp;
devvp->v_specflags |= SI_MOUNTEDON;
/* Check the Rock Ridge Extention support */
if (!(argp->flags & ISOFSMNT_NORRIP)) {
if (error = bread(isomp->im_devvp,
(isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
(isomp->im_bshift - DEV_BSHIFT),
isomp->logical_block_size, NOCRED, &bp))
goto out;
rootp = (struct iso_directory_record *)bp->b_data;
if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
argp->flags |= ISOFSMNT_NORRIP;
} else {
argp->flags &= ~ISOFSMNT_GENS;
}
/*
* The contents are valid,
* but they will get reread as part of another vnode, so...
*/
bp->b_flags |= B_AGE;
brelse(bp);
bp = NULL;
}
isomp->im_flags = argp->flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS|ISOFSMNT_EXTATT);
if(high_sierra)
/* this effectively ignores all the mount flags */
isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
else
switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
default:
isomp->iso_ftype = ISO_FTYPE_DEFAULT;
break;
case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
isomp->iso_ftype = ISO_FTYPE_9660;
break;
case 0:
isomp->iso_ftype = ISO_FTYPE_RRIP;
break;
}
return 0;
out:
devvp->v_specflags &= ~SI_MOUNTEDON;
if (bp)
brelse(bp);
if (needclose)
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
if (isomp) {
free((caddr_t)isomp, M_ISOFSMNT);
mp->mnt_data = (qaddr_t)0;
}
return error;
}
/*
* Make a filesystem operational.
* Nothing to do at the moment.
*/
/* ARGSUSED */
static int
cd9660_start(mp, flags, p)
struct mount *mp;
int flags;
struct proc *p;
{
return 0;
}
/*
* unmount system call
*/
static int
cd9660_unmount(mp, mntflags, p)
struct mount *mp;
int mntflags;
struct proc *p;
{
register struct iso_mnt *isomp;
int error, flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
#if 0
mntflushbuf(mp, 0);
if (mntinvalbuf(mp))
return EBUSY;
#endif
if ((error = vflush(mp, NULLVP, flags)))
return (error);
isomp = VFSTOISOFS(mp);
isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON;
error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p);
vrele(isomp->im_devvp);
free((caddr_t)isomp, M_ISOFSMNT);
mp->mnt_data = (qaddr_t)0;
mp->mnt_flag &= ~MNT_LOCAL;
return (error);
}
/*
* Return root of a filesystem
*/
static int
cd9660_root(mp, vpp)
struct mount *mp;
struct vnode **vpp;
{
struct iso_mnt *imp = VFSTOISOFS(mp);
struct iso_directory_record *dp =
(struct iso_directory_record *)imp->root;
ino_t ino = isodirino(dp, imp);
/*
* With RRIP we must use the `.' entry of the root directory.
* Simply tell vget, that it's a relocated directory.
*/
return (cd9660_vget_internal(mp, ino, vpp,
imp->iso_ftype == ISO_FTYPE_RRIP, dp));
}
/*
* Do operations associated with quotas, not supported
*/
/* ARGSUSED */
static int
cd9660_quotactl(mp, cmd, uid, arg, p)
struct mount *mp;
int cmd;
uid_t uid;
caddr_t arg;
struct proc *p;
{
return (EOPNOTSUPP);
}
/*
* Get file system statistics.
*/
int
cd9660_statfs(mp, sbp, p)
struct mount *mp;
register struct statfs *sbp;
struct proc *p;
{
register struct iso_mnt *isomp;
isomp = VFSTOISOFS(mp);
sbp->f_type = MOUNT_CD9660;
sbp->f_bsize = isomp->logical_block_size;
sbp->f_iosize = sbp->f_bsize; /* XXX */
sbp->f_blocks = isomp->volume_space_size;
sbp->f_bfree = 0; /* total free blocks */
sbp->f_bavail = 0; /* blocks free for non superuser */
sbp->f_files = 0; /* total files */
sbp->f_ffree = 0; /* free file nodes */
if (sbp != &mp->mnt_stat) {
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
}
/* Use the first spare for flags: */
sbp->f_spare[0] = isomp->im_flags;
return 0;
}
/* ARGSUSED */
static int
cd9660_sync(mp, waitfor, cred, p)
struct mount *mp;
int waitfor;
struct ucred *cred;
struct proc *p;
{
return (0);
}
/*
* File handle to vnode
*
* Have to be really careful about stale file handles:
* - check that the inode number is in range
* - call iget() to get the locked inode
* - check for an unallocated inode (i_mode == 0)
* - check that the generation number matches
*/
struct ifid {
ushort ifid_len;
ushort ifid_pad;
int ifid_ino;
long ifid_start;
};
/* ARGSUSED */
int
cd9660_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
register struct mount *mp;
struct fid *fhp;
struct sockaddr *nam;
struct vnode **vpp;
int *exflagsp;
struct ucred **credanonp;
{
struct ifid *ifhp = (struct ifid *)fhp;
register struct iso_node *ip;
register struct netcred *np;
register struct iso_mnt *imp = VFSTOISOFS(mp);
struct vnode *nvp;
int error;
#ifdef ISOFS_DBG
printf("fhtovp: ino %d, start %ld\n",
ifhp->ifid_ino, ifhp->ifid_start);
#endif
/*
* Get the export permission structure for this <mp, client> tuple.
*/
np = vfs_export_lookup(mp, &imp->im_export, nam);
if (np == NULL)
return (EACCES);
if (error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) {
*vpp = NULLVP;
return (error);
}
ip = VTOI(nvp);
if (ip->inode.iso_mode == 0) {
vput(nvp);
*vpp = NULLVP;
return (ESTALE);
}
*vpp = nvp;
*exflagsp = np->netc_exflags;
*credanonp = &np->netc_anon;
return (0);
}
int
cd9660_vget(mp, ino, vpp)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
{
/*
* XXXX
* It would be nice if we didn't always set the `relocated' flag
* and force the extra read, but I don't want to think about fixing
* that right now.
*/
return (cd9660_vget_internal(mp, ino, vpp,
#if 0
VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
#else
0,
#endif
(struct iso_directory_record *)0));
}
int
cd9660_vget_internal(mp, ino, vpp, relocated, isodir)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
int relocated;
struct iso_directory_record *isodir;
{
struct iso_mnt *imp;
struct iso_node *ip;
struct buf *bp;
struct vnode *vp, *nvp;
dev_t dev;
int error;
imp = VFSTOISOFS(mp);
dev = imp->im_dev;
if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
return (0);
/* Allocate a new vnode/iso_node. */
if (error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) {
*vpp = NULLVP;
return (error);
}
MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
M_WAITOK);
bzero((caddr_t)ip, sizeof(struct iso_node));
lockinit(&ip->i_lock, PINOD, "isonode", 0, 0);
vp->v_data = ip;
ip->i_vnode = vp;
ip->i_dev = dev;
ip->i_number = ino;
/*
* Put it onto its hash chain and lock it so that other requests for
* this inode will block if they arrive while we are sleeping waiting
* for old data structures to be purged or for the contents of the
* disk portion of this inode to be read.
*/
cd9660_ihashins(ip);
if (isodir == 0) {
int lbn, off;
lbn = lblkno(imp, ino);
if (lbn >= imp->volume_space_size) {
vput(vp);
printf("fhtovp: lbn exceed volume space %d\n", lbn);
return (ESTALE);
}
off = blkoff(imp, ino);
if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
vput(vp);
printf("fhtovp: crosses block boundary %d\n",
off + ISO_DIRECTORY_RECORD_SIZE);
return (ESTALE);
}
error = bread(imp->im_devvp,
lbn << (imp->im_bshift - DEV_BSHIFT),
imp->logical_block_size, NOCRED, &bp);
if (error) {
vput(vp);
brelse(bp);
printf("fhtovp: bread error %d\n",error);
return (error);
}
isodir = (struct iso_directory_record *)(bp->b_data + off);
if (off + isonum_711(isodir->length) >
imp->logical_block_size) {
vput(vp);
if (bp != 0)
brelse(bp);
printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
off +isonum_711(isodir->length), off,
isonum_711(isodir->length));
return (ESTALE);
}
#if 0
if (isonum_733(isodir->extent) +
isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
if (bp != 0)
brelse(bp);
printf("fhtovp: file start miss %d vs %d\n",
isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
ifhp->ifid_start);
return (ESTALE);
}
#endif
} else
bp = 0;
ip->i_mnt = imp;
ip->i_devvp = imp->im_devvp;
VREF(ip->i_devvp);
if (relocated) {
/*
* On relocated directories we must
* read the `.' entry out of a dir.
*/
ip->iso_start = ino >> imp->im_bshift;
if (bp != 0)
brelse(bp);
if (error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) {
vput(vp);
return (error);
}
isodir = (struct iso_directory_record *)bp->b_data;
}
ip->iso_extent = isonum_733(isodir->extent);
ip->i_size = isonum_733(isodir->size);
ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
/*
* Setup time stamp, attribute
*/
vp->v_type = VNON;
switch (imp->iso_ftype) {
default: /* ISO_FTYPE_9660 */
{
struct buf *bp2;
int off;
if ((imp->im_flags & ISOFSMNT_EXTATT)
&& (off = isonum_711(isodir->ext_attr_length)))
cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
&bp2);
else
bp2 = NULL;
cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
if (bp2)
brelse(bp2);
break;
}
case ISO_FTYPE_RRIP:
cd9660_rrip_analyze(isodir, ip, imp);
break;
}
if (bp != 0)
brelse(bp);
/*
* Initialize the associated vnode
*/
switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
case VFIFO:
vp->v_op = cd9660_fifoop_p;
break;
case VCHR:
case VBLK:
/*
* if device, look at device number table for translation
*/
vp->v_op = cd9660_specop_p;
if (nvp = checkalias(vp, ip->inode.iso_rdev, mp)) {
/*
* Discard unneeded vnode, but save its iso_node.
* Note that the lock is carried over in the iso_node
* to the replacement vnode.
*/
nvp->v_data = vp->v_data;
vp->v_data = NULL;
vp->v_op = spec_vnodeop_p;
vrele(vp);
vgone(vp);
/*
* Reinitialize aliased inode.
*/
vp = nvp;
ip->i_vnode = vp;
}
break;
}
if (ip->iso_extent == imp->root_extent)
vp->v_flag |= VROOT;
/*
* XXX need generation number?
*/
*vpp = vp;
return (0);
}
/*
* Vnode pointer to File handle
*/
/* ARGSUSED */
int
cd9660_vptofh(vp, fhp)
struct vnode *vp;
struct fid *fhp;
{
register struct iso_node *ip = VTOI(vp);
register struct ifid *ifhp;
ifhp = (struct ifid *)fhp;
ifhp->ifid_len = sizeof(struct ifid);
ifhp->ifid_ino = ip->i_number;
ifhp->ifid_start = ip->iso_start;
#ifdef ISOFS_DBG
printf("vptofh: ino %d, start %ld\n",
ifhp->ifid_ino,ifhp->ifid_start);
#endif
return 0;
}
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