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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/usb/u3g/@/fs/cd9660/cd9660_vfsops.c |
/*-
* 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.
* 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
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/fs/cd9660/cd9660_vfsops.c 230725 2012-01-29 08:03:45Z mckusick $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/bio.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 <sys/syslog.h>
#include <sys/iconv.h>
#include <fs/cd9660/iso.h>
#include <fs/cd9660/iso_rrip.h>
#include <fs/cd9660/cd9660_node.h>
#include <fs/cd9660/cd9660_mount.h>
#include <geom/geom.h>
#include <geom/geom_vfs.h>
MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure");
MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part");
struct iconv_functions *cd9660_iconv = NULL;
static vfs_mount_t cd9660_mount;
static vfs_cmount_t cd9660_cmount;
static vfs_unmount_t cd9660_unmount;
static vfs_root_t cd9660_root;
static vfs_statfs_t cd9660_statfs;
static vfs_vget_t cd9660_vget;
static vfs_fhtovp_t cd9660_fhtovp;
static struct vfsops cd9660_vfsops = {
.vfs_fhtovp = cd9660_fhtovp,
.vfs_mount = cd9660_mount,
.vfs_cmount = cd9660_cmount,
.vfs_root = cd9660_root,
.vfs_statfs = cd9660_statfs,
.vfs_unmount = cd9660_unmount,
.vfs_vget = cd9660_vget,
};
VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
MODULE_VERSION(cd9660, 1);
static int iso_mountfs(struct vnode *devvp, struct mount *mp);
/*
* VFS Operations.
*/
static int
cd9660_cmount(struct mntarg *ma, void *data, uint64_t flags)
{
struct iso_args args;
struct export_args exp;
int error;
error = copyin(data, &args, sizeof args);
if (error)
return (error);
vfs_oexport_conv(&args.export, &exp);
ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
ma = mount_arg(ma, "export", &exp, sizeof(exp));
ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64);
ma = mount_argsu(ma, "cs_local", args.cs_local, 64);
ma = mount_argf(ma, "ssector", "%u", args.ssector);
ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip");
ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens");
ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt");
ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet");
ma = mount_argb(ma,
args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet");
ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv");
error = kernel_mount(ma, flags);
return (error);
}
static int
cd9660_mount(struct mount *mp)
{
struct vnode *devvp;
struct thread *td;
char *fspec;
int error;
accmode_t accmode;
struct nameidata ndp;
struct iso_mnt *imp = 0;
td = curthread;
/*
* Unconditionally mount as read-only.
*/
MNT_ILOCK(mp);
mp->mnt_flag |= MNT_RDONLY;
MNT_IUNLOCK(mp);
fspec = vfs_getopts(mp->mnt_optnew, "from", &error);
if (error)
return (error);
imp = VFSTOISOFS(mp);
if (mp->mnt_flag & MNT_UPDATE) {
if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))
return (0);
}
/*
* 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 | LOCKLEAF, UIO_SYSSPACE, fspec, td);
if ((error = namei(&ndp)))
return (error);
NDFREE(&ndp, NDF_ONLY_PNBUF);
devvp = ndp.ni_vp;
if (!vn_isdisk(devvp, &error)) {
vput(devvp);
return (error);
}
/*
* Verify that user has necessary permissions on the device,
* or has superuser abilities
*/
accmode = VREAD;
error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
if (error)
error = priv_check(td, PRIV_VFS_MOUNT_PERM);
if (error) {
vput(devvp);
return (error);
}
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
error = iso_mountfs(devvp, mp);
if (error)
vrele(devvp);
} else {
if (devvp != imp->im_devvp)
error = EINVAL; /* needs translation */
vput(devvp);
}
if (error)
return (error);
vfs_mountedfrom(mp, fspec);
return (0);
}
/*
* Common code for mount and mountroot
*/
static int
iso_mountfs(devvp, mp)
struct vnode *devvp;
struct mount *mp;
{
struct iso_mnt *isomp = (struct iso_mnt *)0;
struct buf *bp = NULL;
struct buf *pribp = NULL, *supbp = NULL;
struct cdev *dev;
int error = EINVAL;
int high_sierra = 0;
int iso_bsize;
int iso_blknum;
int joliet_level;
struct iso_volume_descriptor *vdp = 0;
struct iso_primary_descriptor *pri = NULL;
struct iso_sierra_primary_descriptor *pri_sierra = NULL;
struct iso_supplementary_descriptor *sup = NULL;
struct iso_directory_record *rootp;
int logical_block_size, ssector;
struct g_consumer *cp;
struct bufobj *bo;
char *cs_local, *cs_disk;
dev = devvp->v_rdev;
dev_ref(dev);
DROP_GIANT();
g_topology_lock();
error = g_vfs_open(devvp, &cp, "cd9660", 0);
g_topology_unlock();
PICKUP_GIANT();
VOP_UNLOCK(devvp, 0);
if (error)
goto out;
if (devvp->v_rdev->si_iosize_max != 0)
mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
if (mp->mnt_iosize_max > MAXPHYS)
mp->mnt_iosize_max = MAXPHYS;
bo = &devvp->v_bufobj;
/* This is the "logical sector size". The standard says this
* should be 2048 or the physical sector size on the device,
* whichever is greater.
*/
if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) {
error = EINVAL;
goto out;
}
iso_bsize = cp->provider->sectorsize;
joliet_level = 0;
if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector))
ssector = 0;
for (iso_blknum = 16 + ssector;
iso_blknum < 100 + ssector;
iso_blknum++) {
if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE),
iso_bsize, NOCRED, &bp)) != 0)
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_sierra) != 0) {
error = EINVAL;
goto out;
} else
high_sierra = 1;
}
switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
case ISO_VD_PRIMARY:
if (pribp == NULL) {
pribp = bp;
bp = NULL;
pri = (struct iso_primary_descriptor *)vdp;
pri_sierra =
(struct iso_sierra_primary_descriptor *)vdp;
}
break;
case ISO_VD_SUPPLEMENTARY:
if (supbp == NULL) {
supbp = bp;
bp = NULL;
sup = (struct iso_supplementary_descriptor *)vdp;
if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) {
if (bcmp(sup->escape, "%/@", 3) == 0)
joliet_level = 1;
if (bcmp(sup->escape, "%/C", 3) == 0)
joliet_level = 2;
if (bcmp(sup->escape, "%/E", 3) == 0)
joliet_level = 3;
if ((isonum_711 (sup->flags) & 1) &&
!vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0))
joliet_level = 0;
}
}
break;
case ISO_VD_END:
goto vd_end;
default:
break;
}
if (bp) {
brelse(bp);
bp = NULL;
}
}
vd_end:
if (bp) {
brelse(bp);
bp = NULL;
}
if (pri == NULL) {
error = EINVAL;
goto out;
}
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 | M_ZERO);
isomp->im_cp = cp;
isomp->im_bo = bo;
isomp->logical_block_size = logical_block_size;
isomp->volume_space_size =
isonum_733 (high_sierra?
pri_sierra->volume_space_size:
pri->volume_space_size);
isomp->joliet_level = 0;
/*
* 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 += 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 = ffs(logical_block_size) - 1;
pribp->b_flags |= B_AGE;
brelse(pribp);
pribp = NULL;
mp->mnt_data = isomp;
mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
mp->mnt_maxsymlinklen = 0;
MNT_ILOCK(mp);
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED |
MNTK_EXTENDED_SHARED;
MNT_IUNLOCK(mp);
isomp->im_mountp = mp;
isomp->im_dev = dev;
isomp->im_devvp = devvp;
vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP);
vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS);
vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT);
vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET);
vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV);
/* Check the Rock Ridge Extension support */
if (!(isomp->im_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)) != 0)
goto out;
rootp = (struct iso_directory_record *)bp->b_data;
if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
isomp->im_flags |= ISOFSMNT_NORRIP;
} else {
isomp->im_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;
}
if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error);
if (error)
goto out;
cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error);
if (error)
goto out;
cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l);
cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d);
} else {
isomp->im_d2l = NULL;
isomp->im_l2d = NULL;
}
if (high_sierra) {
/* this effectively ignores all the mount flags */
if (bootverbose)
log(LOG_INFO, "cd9660: High Sierra Format\n");
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:
if (bootverbose)
log(LOG_INFO, "cd9660: RockRidge Extension\n");
isomp->iso_ftype = ISO_FTYPE_RRIP;
break;
}
/* Decide whether to use the Joliet descriptor */
if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
if (bootverbose)
log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n",
joliet_level);
rootp = (struct iso_directory_record *)
sup->root_directory_record;
bcopy (rootp, isomp->root, sizeof isomp->root);
isomp->root_extent = isonum_733 (rootp->extent);
isomp->root_size = isonum_733 (rootp->size);
isomp->joliet_level = joliet_level;
supbp->b_flags |= B_AGE;
}
if (supbp) {
brelse(supbp);
supbp = NULL;
}
return 0;
out:
if (bp)
brelse(bp);
if (pribp)
brelse(pribp);
if (supbp)
brelse(supbp);
if (cp != NULL) {
DROP_GIANT();
g_topology_lock();
g_vfs_close(cp);
g_topology_unlock();
PICKUP_GIANT();
}
if (isomp) {
free((caddr_t)isomp, M_ISOFSMNT);
mp->mnt_data = NULL;
}
dev_rel(dev);
return error;
}
/*
* unmount system call
*/
static int
cd9660_unmount(mp, mntflags)
struct mount *mp;
int mntflags;
{
struct iso_mnt *isomp;
int error, flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
if ((error = vflush(mp, 0, flags, curthread)))
return (error);
isomp = VFSTOISOFS(mp);
if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
if (isomp->im_d2l)
cd9660_iconv->close(isomp->im_d2l);
if (isomp->im_l2d)
cd9660_iconv->close(isomp->im_l2d);
}
DROP_GIANT();
g_topology_lock();
g_vfs_close(isomp->im_cp);
g_topology_unlock();
PICKUP_GIANT();
vrele(isomp->im_devvp);
dev_rel(isomp->im_dev);
free((caddr_t)isomp, M_ISOFSMNT);
mp->mnt_data = NULL;
MNT_ILOCK(mp);
mp->mnt_flag &= ~MNT_LOCAL;
MNT_IUNLOCK(mp);
return (error);
}
/*
* Return root of a filesystem
*/
static int
cd9660_root(mp, flags, vpp)
struct mount *mp;
int flags;
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, flags, vpp,
imp->iso_ftype == ISO_FTYPE_RRIP, dp));
}
/*
* Get filesystem statistics.
*/
static int
cd9660_statfs(mp, sbp)
struct mount *mp;
struct statfs *sbp;
{
struct iso_mnt *isomp;
isomp = VFSTOISOFS(mp);
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 */
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
*/
/* ARGSUSED */
static int
cd9660_fhtovp(mp, fhp, flags, vpp)
struct mount *mp;
struct fid *fhp;
int flags;
struct vnode **vpp;
{
struct ifid ifh;
struct iso_node *ip;
struct vnode *nvp;
int error;
memcpy(&ifh, fhp, sizeof(ifh));
#ifdef ISOFS_DBG
printf("fhtovp: ino %d, start %ld\n",
ifh.ifid_ino, ifh.ifid_start);
#endif
if ((error = VFS_VGET(mp, ifh.ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
*vpp = NULLVP;
return (error);
}
ip = VTOI(nvp);
if (ip->inode.iso_mode == 0) {
vput(nvp);
*vpp = NULLVP;
return (ESTALE);
}
*vpp = nvp;
vnode_create_vobject(*vpp, ip->i_size, curthread);
return (0);
}
static int
cd9660_vget(mp, ino, flags, vpp)
struct mount *mp;
ino_t ino;
int flags;
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, flags, vpp,
#if 0
VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
#else
0,
#endif
(struct iso_directory_record *)0));
}
int
cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
struct mount *mp;
ino_t ino;
int flags;
struct vnode **vpp;
int relocated;
struct iso_directory_record *isodir;
{
struct iso_mnt *imp;
struct iso_node *ip;
struct buf *bp;
struct vnode *vp;
struct cdev *dev;
int error;
struct thread *td;
td = curthread;
error = vfs_hash_get(mp, ino, flags, td, vpp, NULL, NULL);
if (error || *vpp != NULL)
return (error);
/*
* We must promote to an exclusive lock for vnode creation. This
* can happen if lookup is passed LOCKSHARED.
*/
if ((flags & LK_TYPE_MASK) == LK_SHARED) {
flags &= ~LK_TYPE_MASK;
flags |= LK_EXCLUSIVE;
}
/*
* We do not lock vnode creation as it is believed to be too
* expensive for such rare case as simultaneous creation of vnode
* for same ino by different processes. We just allow them to race
* and check later to decide who wins. Let the race begin!
*/
imp = VFSTOISOFS(mp);
dev = imp->im_dev;
/* Allocate a new vnode/iso_node. */
if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) {
*vpp = NULLVP;
return (error);
}
ip = malloc(sizeof(struct iso_node), M_ISOFSNODE,
M_WAITOK | M_ZERO);
vp->v_data = ip;
ip->i_vnode = vp;
ip->i_number = ino;
lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
error = insmntque(vp, mp);
if (error != 0) {
free(ip, M_ISOFSNODE);
*vpp = NULLVP;
return (error);
}
error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL);
if (error || *vpp != NULL)
return (error);
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;
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)) != 0) {
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_fifoops;
break;
default:
VN_LOCK_ASHARE(vp);
break;
}
if (ip->iso_extent == imp->root_extent)
vp->v_vflag |= VV_ROOT;
/*
* XXX need generation number?
*/
*vpp = vp;
return (0);
}