/* $NetBSD: cd9660_vfsops.c,v 1.105 2025/02/16 18:38:58 joe Exp $ */

/* $NetBSD: cd9660_vfsops.c,v 1.105 2025/02/16 18:38:58 joe 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 ([email protected]). The Rock Ridge Extension
* Support code is derived from software contributed to Berkeley
* by Atsushi Murai ([email protected]).
*
* 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 1.105 2025/02/16 18:38:58 joe 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/genfs/genfs.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 <sys/module.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>

MODULE(MODULE_CLASS_VFS, cd9660, NULL);

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 = {
.vfs_name = MOUNT_CD9660,
.vfs_min_mount_data = sizeof (struct iso_args),
.vfs_mount = cd9660_mount,
.vfs_start = cd9660_start,
.vfs_unmount = cd9660_unmount,
.vfs_root = cd9660_root,
.vfs_quotactl = (void *)eopnotsupp,
.vfs_statvfs = cd9660_statvfs,
.vfs_sync = cd9660_sync,
.vfs_vget = cd9660_vget,
.vfs_loadvnode = cd9660_loadvnode,
.vfs_fhtovp = cd9660_fhtovp,
.vfs_vptofh = cd9660_vptofh,
.vfs_init = cd9660_init,
.vfs_reinit = cd9660_reinit,
.vfs_done = cd9660_done,
.vfs_mountroot = cd9660_mountroot,
.vfs_snapshot = (void *)eopnotsupp,
.vfs_extattrctl = vfs_stdextattrctl,
.vfs_suspendctl = genfs_suspendctl,
.vfs_renamelock_enter = genfs_renamelock_enter,
.vfs_renamelock_exit = genfs_renamelock_exit,
.vfs_fsync = (void *)eopnotsupp,
.vfs_opv_descs = cd9660_vnodeopv_descs
};

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.
*/
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);

SYSCTL_SETUP(cd9660_sysctl_setup, "cd9660 sysctl")
{

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 filenames to UTF-8"),
NULL, 0, &cd9660_utf8_joliet, 0,
CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL);
/*
* XXX the "14" above could be dynamic, thereby eliminating
* one more instance of the "number to vfs" mapping problem,
* but "14" is the order as taken from sys/mount.h
*/
}

static int
cd9660_modcmd(modcmd_t cmd, void *arg)
{
int error;

switch (cmd) {
case MODULE_CMD_INIT:
error = vfs_attach(&cd9660_vfsops);
break;
case MODULE_CMD_FINI:
error = vfs_detach(&cd9660_vfsops);
break;
default:
error = ENOTTY;
break;
}

return (error);
}

/* Compat with pre uid/gid/fsize/dsize mount call */
#define OSIZE sizeof(struct { \
const char *fspec; \
struct export_args30 _pad1; \
int flags; \
})

static int
iso_checkupdate(const struct vnode *devvp, const struct iso_mnt *imp,
const struct iso_args *args)
{

if (devvp != imp->im_devvp && devvp->v_rdev != imp->im_devvp->v_rdev)
return EINVAL;

if (((imp->im_flags & ISOFSMNT_UID) && args->uid != imp->im_uid) ||
((imp->im_flags & ISOFSMNT_GID) && args->gid != imp->im_gid) ||
args->fmask != imp->im_fmask || args->dmask != imp->im_dmask)
return EPERM;

return 0;
}

static void
iso_copyidmask(struct iso_args *args, const struct iso_mnt *imp)
{

if (imp == NULL) {
args->uid = args->gid = 0;
args->fmask = args->dmask = S_IRWXU|S_IRWXG|S_IRWXO;
return;
}
args->uid = imp->im_uid;
args->gid = imp->im_gid;
args->fmask = imp->im_fmask;
args->dmask = imp->im_dmask;
}

int
cd9660_mountroot(void)
{
struct mount *mp;
struct lwp *l = curlwp;
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;
iso_copyidmask(&args, NULL);
if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) {
vfs_unbusy(mp);
vfs_rele(mp);
return (error);
}
mountlist_append(mp);
(void)cd9660_statvfs(mp, &mp->mnt_stat);
vfs_unbusy(mp);
return (0);
}

/*
* VFS Operations.
*
* mount system call
*/

int
cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
{
struct lwp *l = curlwp;
struct vnode *devvp;
struct iso_args aa, *args = data;
int error;
struct iso_mnt *imp = VFSTOISOFS(mp);

if (args == NULL)
return EINVAL;

if (*data_len != OSIZE && *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;
if (*data_len == OSIZE)
return 0;

iso_copyidmask(args, imp);
*data_len = sizeof(*args);
return 0;
}

if (*data_len == OSIZE) {
memcpy(&aa, args, OSIZE);
args = &aa;
iso_copyidmask(args, (mp->mnt_flag & MNT_UPDATE) ? imp : NULL);
}

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.
*/
error = namei_simple_user(args->fspec,
NSM_FOLLOW_NOEMULROOT, &devvp);
if (error != 0)
return error;

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.
*/
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT,
KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD));
if (error) {
goto fail;
}
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
error = VOP_OPEN(devvp, FREAD, FSCRED);
if (error)
goto fail;
VOP_UNLOCK(devvp);
error = iso_mountfs(devvp, mp, l, args);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
if (error) {
(void)VOP_CLOSE(devvp, FREAD, NOCRED);
goto fail;
}
VOP_UNLOCK(devvp);
/* reference to devvp is donated through iso_mountfs */
} else {
if ((error = iso_checkupdate(devvp, imp, args)) != 0)
goto fail;
VOP_UNLOCK(devvp);
vrele(devvp);
}
return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
mp->mnt_op->vfs_name, mp, l);

fail:
VOP_UNLOCK(devvp);
vrele(devvp);
return error;
}

/*
* Make a mount point from a volume descriptor
*/
static int
iso_makemp(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(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. */
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0);
VOP_UNLOCK(devvp);
if (error != 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);
if (!error) {
/* 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);
if (error)
sess = 0; /* never mind */
}
#ifdef ISO_DEBUG
printf("isofs: session offset (part %"PRId32") %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, 0, &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, 0);
bp = NULL;
break;
}

if (bp != NULL) {
brelse(bp, 0);
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;

brelse(pribp, BC_AGE);
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 = ISO_MAXNAMLEN;
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_iflag |= IMNT_MPSAFE | IMNT_SHRLOOKUP;
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;

if (argp->flags & ISOFSMNT_UID)
isomp->im_uid = argp->uid;
if (argp->flags & ISOFSMNT_GID)
isomp->im_gid = argp->gid;
isomp->im_fmask = argp->fmask & ACCESSPERMS;
isomp->im_dmask = argp->dmask & ACCESSPERMS;

/* 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,
0, &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...
*/
brelse(bp, BC_AGE);
bp = NULL;
}
isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS |
ISOFSMNT_UID | ISOFSMNT_GID);

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, 0);
supbp = NULL;
}

spec_node_setmountedfs(devvp, mp);

return 0;
out:
if (bp)
brelse(bp, 0);
if (pribp)
brelse(pribp, 0);
if (supbp)
brelse(supbp, 0);
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)
{
return 0;
}

/*
* unmount system call
*/
int
cd9660_unmount(struct mount *mp, int mntflags)
{
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);

if (isomp->im_devvp->v_type != VBAD)
spec_node_setmountedfs(isomp->im_devvp, NULL);

vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED);
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(struct mount *mp, int lktype, 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);

return cd9660_vget(mp, ino, lktype, vpp);
}

/*
* Get file system statistics.
*/
int
cd9660_statvfs(struct mount *mp, struct statvfs *sbp)
{
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)
{
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;
ino_t ifid_ino;
#ifdef ISOFS_DBG
u_long ifid_start;
#endif
};

/* ARGSUSED */
int
cd9660_fhtovp(struct mount *mp, struct fid *fhp, int lktype, 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 %"PRIu64", start %lu\n",
ifh.ifid_ino, ifh.ifid_start);
#endif

if ((error = VFS_VGET(mp, ifh.ifid_ino, lktype, &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(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp)
{
int error;

error = vcache_get(mp, &ino, sizeof(ino), vpp);
if (error)
return error;
error = vn_lock(*vpp, lktype);
if (error) {
vrele(*vpp);
*vpp = NULL;
return error;
}
return 0;
}

int
cd9660_loadvnode(struct mount *mp, struct vnode *vp,
const void *key, size_t key_len, const void **new_key)
{
struct iso_mnt *imp;
struct iso_node *ip;
struct iso_directory_record *isodir;
struct buf *bp;
dev_t dev;
ino_t ino;
int lbn, off;
int error;

KASSERT(key_len == sizeof(ino));
memcpy(&ino, key, key_len);
imp = VFSTOISOFS(mp);
dev = imp->im_dev;

ip = pool_get(&cd9660_node_pool, PR_WAITOK);

memset(ip, 0, sizeof(struct iso_node));
ip->i_vnode = vp;
ip->i_dev = dev;
ip->i_number = ino;
ip->i_mnt = imp;
ip->i_devvp = imp->im_devvp;

lbn = cd9660_lblkno(imp, ino);
if (lbn >= imp->volume_space_size) {
pool_put(&cd9660_node_pool, ip);
printf("fhtovp: lbn exceed volume space %d\n", lbn);
return (ESTALE);
}

off = cd9660_blkoff(imp, ino);
if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
pool_put(&cd9660_node_pool, ip);
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, 0, &bp);
if (error) {
pool_put(&cd9660_node_pool, ip);
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) {
pool_put(&cd9660_node_pool, ip);
brelse(bp, 0);
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) {
pool_put(&cd9660_node_pool, ip);
if (bp != 0)
brelse(bp, 0);
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

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;

vp->v_tag = VT_ISOFS;
vp->v_op = cd9660_vnodeop_p;
vp->v_data = ip;
genfs_node_init(vp, &cd9660_genfsops);

/*
* Setup time stamp, attribute
*/
switch (imp->iso_ftype) {
default: /* ISO_FTYPE_9660 */
{
struct buf *bp2;
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, 0);
break;
}
case ISO_FTYPE_RRIP:
cd9660_rrip_analyze(isodir, ip, imp);
break;
}

brelse(bp, 0);

/*
* 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;
spec_node_init(vp, ip->inode.iso_rdev);
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_vflag |= VV_ROOT;

/*
* XXX need generation number?
*/

*new_key = &ip->i_number;
return 0;
}

/*
* Vnode pointer to File handle
*/
/* ARGSUSED */
int
cd9660_vptofh(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;
#ifdef ISOFS_DBG
ifh.ifid_start = ip->iso_start;
#endif
memcpy(fhp, &ifh, sizeof(ifh));

#ifdef ISOFS_DBG
printf("vptofh: ino %"PRIu64", start %lu\n",
ifh.ifid_ino,ifh.ifid_start);
#endif
return 0;
}