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NetBSD/sys/fs/cd9660/cd9660_vfsops.c

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/* $NetBSD: cd9660_vfsops.c,v 1.47 2007/07/31 21:14:17 pooka Exp $ */
/*-
* 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. 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>
__KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.47 2007/07/31 21:14:17 pooka Exp $");
#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
#endif
#include <sys/param.h>
#include <sys/sysctl.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/file.h>
#include <sys/disklabel.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/cdio.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/stat.h>
#include <sys/conf.h>
#include <sys/dirent.h>
#include <sys/kauth.h>
#include <fs/cd9660/iso.h>
#include <fs/cd9660/cd9660_extern.h>
#include <fs/cd9660/iso_rrip.h>
#include <fs/cd9660/cd9660_node.h>
#include <fs/cd9660/cd9660_mount.h>
MALLOC_JUSTDEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc;
extern const struct vnodeopv_desc cd9660_specop_opv_desc;
extern const struct vnodeopv_desc cd9660_fifoop_opv_desc;
const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = {
&cd9660_vnodeop_opv_desc,
&cd9660_specop_opv_desc,
&cd9660_fifoop_opv_desc,
NULL,
};
struct vfsops cd9660_vfsops = {
MOUNT_CD9660,
sizeof (struct iso_args),
cd9660_mount,
cd9660_start,
cd9660_unmount,
cd9660_root,
cd9660_quotactl,
cd9660_statvfs,
cd9660_sync,
cd9660_vget,
cd9660_fhtovp,
cd9660_vptofh,
cd9660_init,
cd9660_reinit,
cd9660_done,
cd9660_mountroot,
(int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
vfs_stdextattrctl,
(void *)eopnotsupp, /* vfs_suspendctl */
cd9660_vnodeopv_descs,
0, /* refcount */
{ NULL, NULL } /* list */
};
VFS_ATTACH(cd9660_vfsops);
static const struct genfs_ops cd9660_genfsops = {
.gop_size = genfs_size,
};
/*
* Called by vfs_mountroot when iso is going to be mounted as root.
*
* Name is updated by mount(8) after booting.
*/
#define ROOTNAME "root_device"
static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len);
static int iso_mountfs(struct vnode *devvp, struct mount *mp,
struct lwp *l, struct iso_args *argp);
int
cd9660_mountroot()
{
struct mount *mp;
struct lwp *l = curlwp; /* XXX */
int error;
struct iso_args args;
if (device_class(root_device) != DV_DISK)
return (ENODEV);
if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp))
!= 0) {
vrele(rootvp);
return (error);
}
args.flags = ISOFSMNT_ROOT;
if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) {
mp->mnt_op->vfs_refcount--;
vfs_unbusy(mp);
free(mp, M_MOUNT);
return (error);
}
simple_lock(&mountlist_slock);
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
simple_unlock(&mountlist_slock);
(void)cd9660_statvfs(mp, &mp->mnt_stat, l);
vfs_unbusy(mp);
return (0);
}
/*
* VFS Operations.
*
* mount system call
*/
int
cd9660_mount(mp, path, data, data_len, l)
struct mount *mp;
const char *path;
void *data;
size_t *data_len;
struct lwp *l;
{
struct nameidata nd;
struct vnode *devvp;
struct iso_args *args = data;
int error;
struct iso_mnt *imp = VFSTOISOFS(mp);
if (*data_len < sizeof *args)
return EINVAL;
if (mp->mnt_flag & MNT_GETARGS) {
if (imp == NULL)
return EIO;
args->fspec = NULL;
args->flags = imp->im_flags;
*data_len = sizeof (*args);
return 0;
}
if ((mp->mnt_flag & MNT_RDONLY) == 0)
return (EROFS);
if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL)
return EINVAL;
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec, l);
if ((error = namei(&nd)) != 0)
return (error);
devvp = nd.ni_vp;
if (devvp->v_type != VBLK) {
vrele(devvp);
return ENOTBLK;
}
if (bdevsw_lookup(devvp->v_rdev) == NULL) {
vrele(devvp);
return ENXIO;
}
/*
* If mount by non-root, then verify that user has necessary
* permissions on the device.
*/
if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_ACCESS(devvp, VREAD, l->l_cred, l);
VOP_UNLOCK(devvp, 0);
if (error) {
vrele(devvp);
return (error);
}
}
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
/*
* 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).
*/
error = vfs_mountedon(devvp);
if (error)
goto fail;
if (vcount(devvp) > 1 && devvp != rootvp) {
error = EBUSY;
goto fail;
}
error = VOP_OPEN(devvp, FREAD, FSCRED, l);
if (error)
goto fail;
error = iso_mountfs(devvp, mp, l, args);
if (error) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
(void)VOP_CLOSE(devvp, FREAD, NOCRED, l);
VOP_UNLOCK(devvp, 0);
goto fail;
}
} else {
vrele(devvp);
if (devvp != imp->im_devvp)
return (EINVAL); /* needs translation */
}
return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
mp->mnt_op->vfs_name, mp, l);
fail:
vrele(devvp);
return (error);
}
/*
* Make a mount point from a volume descriptor
*/
static int
iso_makemp(isomp, bp, ea_len)
struct iso_mnt *isomp;
struct buf *bp;
int *ea_len;
{
struct iso_primary_descriptor *pri;
int logical_block_size;
struct iso_directory_record *rootp;
pri = (struct iso_primary_descriptor *)bp->b_data;
logical_block_size = isonum_723 (pri->logical_block_size);
if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
|| (logical_block_size & (logical_block_size - 1)) != 0)
return -1;
rootp = (struct iso_directory_record *)pri->root_directory_record;
isomp->logical_block_size = logical_block_size;
isomp->volume_space_size = isonum_733 (pri->volume_space_size);
memcpy(isomp->root, rootp, sizeof(isomp->root));
isomp->root_extent = isonum_733 (rootp->extent);
isomp->root_size = isonum_733 (rootp->size);
isomp->im_joliet_level = 0;
isomp->im_bmask = logical_block_size - 1;
isomp->im_bshift = 0;
while ((1 << isomp->im_bshift) < isomp->logical_block_size)
isomp->im_bshift++;
if (ea_len != NULL)
*ea_len = isonum_711(rootp->ext_attr_length);
return 0;
}
/*
* Common code for mount and mountroot
*/
static int
iso_mountfs(devvp, mp, l, argp)
struct vnode *devvp;
struct mount *mp;
struct lwp *l;
struct iso_args *argp;
{
struct iso_mnt *isomp = (struct iso_mnt *)0;
struct buf *bp = NULL, *pribp = NULL, *supbp = NULL;
dev_t dev = devvp->v_rdev;
int error = EINVAL;
int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
int iso_bsize;
int iso_blknum;
int joliet_level;
struct iso_volume_descriptor *vdp;
struct iso_supplementary_descriptor *sup;
int sess = 0;
int ext_attr_length;
struct disklabel label;
if (!ronly)
return EROFS;
/* Flush out any old buffers remaining from a previous use. */
if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0)
return (error);
/* 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;
error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED, l);
if (!error &&
label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) {
/* XXX more sanity checks? */
sess = label.d_partitions[DISKPART(dev)].p_cdsession;
} else {
/* fallback to old method */
error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED, l);
if (error)
sess = 0; /* never mind */
}
#ifdef ISO_DEBUG
printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess);
#endif
for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize),
iso_bsize, NOCRED, &bp)) != 0)
goto out;
vdp = (struct iso_volume_descriptor *)bp->b_data;
if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) {
error = EINVAL;
goto out;
}
switch (isonum_711(vdp->type)) {
case ISO_VD_PRIMARY:
if (pribp == NULL) {
pribp = bp;
bp = NULL;
}
break;
case ISO_VD_SUPPLEMENTARY:
if (supbp == NULL) {
supbp = bp;
bp = NULL;
}
break;
default:
break;
}
if (isonum_711 (vdp->type) == ISO_VD_END) {
brelse(bp);
bp = NULL;
break;
}
if (bp != NULL) {
brelse(bp);
bp = NULL;
}
}
if (pribp == NULL) {
error = EINVAL;
goto out;
}
isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
memset(isomp, 0, sizeof *isomp);
if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) {
error = EINVAL;
goto out;
}
isomp->volume_space_size += sess;
pribp->b_flags |= B_AGE;
brelse(pribp);
pribp = NULL;
mp->mnt_data = isomp;
mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660);
mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
mp->mnt_stat.f_namemax = MAXNAMLEN;
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_dev_bshift = iso_bsize;
mp->mnt_fs_bshift = isomp->im_bshift;
isomp->im_mountp = mp;
isomp->im_dev = dev;
isomp->im_devvp = devvp;
/* Check the Rock Ridge Extension support */
if (!(argp->flags & ISOFSMNT_NORRIP)) {
struct iso_directory_record *rootp;
if ((error = bread(isomp->im_devvp,
(isomp->root_extent + 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) {
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 | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS);
if (isomp->im_flags & ISOFSMNT_GENS)
isomp->iso_ftype = ISO_FTYPE_9660;
else if (isomp->im_flags & ISOFSMNT_NORRIP) {
isomp->iso_ftype = ISO_FTYPE_DEFAULT;
if (argp->flags & ISOFSMNT_NOCASETRANS)
isomp->im_flags |= ISOFSMNT_NOCASETRANS;
} else
isomp->iso_ftype = ISO_FTYPE_RRIP;
/* Check the Joliet Extension support */
if ((argp->flags & ISOFSMNT_NORRIP) != 0 &&
(argp->flags & ISOFSMNT_NOJOLIET) == 0 &&
supbp != NULL) {
joliet_level = 0;
sup = (struct iso_supplementary_descriptor *)supbp->b_data;
if ((isonum_711(sup->flags) & 1) == 0) {
if (memcmp(sup->escape, "%/@", 3) == 0)
joliet_level = 1;
if (memcmp(sup->escape, "%/C", 3) == 0)
joliet_level = 2;
if (memcmp(sup->escape, "%/E", 3) == 0)
joliet_level = 3;
}
if (joliet_level != 0) {
if (iso_makemp(isomp, supbp, NULL) == -1) {
error = EINVAL;
goto out;
}
isomp->im_joliet_level = joliet_level;
}
}
if (supbp != NULL) {
brelse(supbp);
supbp = NULL;
}
devvp->v_specmountpoint = mp;
return 0;
out:
if (bp)
brelse(bp);
if (pribp)
brelse(pribp);
if (supbp)
brelse(supbp);
if (isomp) {
free(isomp, M_ISOFSMNT);
mp->mnt_data = NULL;
}
return error;
}
/*
* Make a filesystem operational.
* Nothing to do at the moment.
*/
/* ARGSUSED */
int
cd9660_start(struct mount *mp, int flags,
struct lwp *l)
{
return 0;
}
/*
* unmount system call
*/
int
cd9660_unmount(mp, mntflags, l)
struct mount *mp;
int mntflags;
struct lwp *l;
{
struct iso_mnt *isomp;
int error, flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
if ((error = vflush(mp, NULLVP, flags)) != 0)
return (error);
isomp = VFSTOISOFS(mp);
#ifdef ISODEVMAP
if (isomp->iso_ftype == ISO_FTYPE_RRIP)
iso_dunmap(isomp->im_dev);
#endif
if (isomp->im_devvp->v_type != VBAD)
isomp->im_devvp->v_specmountpoint = NULL;
vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, l);
vput(isomp->im_devvp);
free(isomp, M_ISOFSMNT);
mp->mnt_data = NULL;
mp->mnt_flag &= ~MNT_LOCAL;
return (error);
}
/*
* Return root of a filesystem
*/
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 */
int
cd9660_quotactl(
struct mount *mp,
int cmd,
uid_t uid,
void *arg,
struct lwp *l)
{
return (EOPNOTSUPP);
}
/*
* Get file system statistics.
*/
int
cd9660_statvfs(
struct mount *mp,
struct statvfs *sbp,
struct lwp *l)
{
struct iso_mnt *isomp;
isomp = VFSTOISOFS(mp);
sbp->f_bsize = isomp->logical_block_size;
sbp->f_frsize = sbp->f_bsize;
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_bresvd = 0; /* total reserved blocks */
sbp->f_files = 0; /* total files */
sbp->f_ffree = 0; /* free file nodes */
sbp->f_favail = 0; /* free file nodes for non superuser */
sbp->f_fresvd = 0; /* reserved file nodes */
copy_statvfs_info(sbp, mp);
/* Use the first spare for flags: */
sbp->f_spare[0] = isomp->im_flags;
return 0;
}
/* ARGSUSED */
int
cd9660_sync(
struct mount *mp,
int waitfor,
kauth_cred_t cred,
struct lwp *l)
{
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, vpp)
struct mount *mp;
struct fid *fhp;
struct vnode **vpp;
{
struct ifid ifh;
struct iso_node *ip;
struct vnode *nvp;
int error;
if (fhp->fid_len != sizeof(ifh))
return EINVAL;
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, &nvp)) != 0) {
*vpp = NULLVP;
return (error);
}
ip = VTOI(nvp);
if (ip->inode.iso_mode == 0) {
vput(nvp);
*vpp = NULLVP;
return (ESTALE);
}
*vpp = nvp;
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
NULL));
}
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;
#ifdef ISODEVMAP
struct iso_dnode *dp;
#endif
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)) != 0) {
*vpp = NULLVP;
return (error);
}
ip = pool_get(&cd9660_node_pool, PR_WAITOK);
memset(ip, 0, sizeof(struct iso_node));
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 *)((char *)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)) != 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);
cd9660_deftstamp(isodir, ip, bp2);
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
*/
#ifdef ISODEVMAP
if ((dp = iso_dmap(dev, ino, 0)) != NULL)
ip->inode.iso_rdev = dp->d_dev;
#endif
vp->v_op = cd9660_specop_p;
if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) {
/*
* 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;
VOP_UNLOCK(vp, 0);
vp->v_op = spec_vnodeop_p;
vrele(vp);
vgone(vp);
lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock);
/*
* Reinitialize aliased inode.
*/
vp = nvp;
ip->i_vnode = vp;
}
break;
case VLNK:
case VNON:
case VSOCK:
case VDIR:
case VBAD:
break;
case VREG:
uvm_vnp_setsize(vp, ip->i_size);
break;
}
if (vp->v_type != VREG)
uvm_vnp_setsize(vp, 0);
if (ip->iso_extent == imp->root_extent)
vp->v_flag |= VROOT;
/*
* XXX need generation number?
*/
genfs_node_init(vp, &cd9660_genfsops);
*vpp = vp;
return (0);
}
/*
* Vnode pointer to File handle
*/
/* ARGSUSED */
int
cd9660_vptofh(vp, fhp, fh_size)
struct vnode *vp;
struct fid *fhp;
size_t *fh_size;
{
struct iso_node *ip = VTOI(vp);
struct ifid ifh;
if (*fh_size < sizeof(struct ifid)) {
*fh_size = sizeof(struct ifid);
return E2BIG;
}
*fh_size = sizeof(struct ifid);
memset(&ifh, 0, sizeof(ifh));
ifh.ifid_len = sizeof(struct ifid);
ifh.ifid_ino = ip->i_number;
ifh.ifid_start = ip->iso_start;
memcpy(fhp, &ifh, sizeof(ifh));
#ifdef ISOFS_DBG
printf("vptofh: ino %d, start %ld\n",
ifh.ifid_ino,ifh.ifid_start);
#endif
return 0;
}
SYSCTL_SETUP(sysctl_vfs_cd9660_setup, "sysctl vfs.cd9660 subtree setup")
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL,
NULL, 0, NULL, 0,
CTL_VFS, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660",
SYSCTL_DESCR("ISO-9660 file system"),
NULL, 0, NULL, 0,
CTL_VFS, 14, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "utf8_joliet",
SYSCTL_DESCR("Encode Joliet file names to UTF-8"),
NULL, 0, &cd9660_utf8_joliet, 0,
CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL);
}
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