xnu-792.6.61.tar.gz

[apple/xnu.git] / bsd / isofs / cd9660 / cd9660_vfsops.c

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*      $NetBSD: cd9660_vfsops.c,v 1.18 1995/03/09 12:05:36 mycroft 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. 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     8.9 (Berkeley) 12/5/94
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/vnode_internal.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/kernel.h>
#include <miscfs/specfs/specdev.h>
#include <sys/buf.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/disk.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <sys/ubc.h>
#include <sys/utfconv.h>
#include <architecture/byte_order.h>

#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/iso_rrip.h>
#include <isofs/cd9660/cd9660_node.h>
#include <isofs/cd9660/cd9660_mount.h>

/*
 * Minutes, Seconds, Frames (M:S:F)
 */
struct CDMSF {
        u_char   minute;
        u_char   second;
        u_char   frame;
};

/*
 * Table Of Contents
 */
struct CDTOC_Desc {
        u_char        session;
        u_char        ctrl_adr;  /* typed to be machine and compiler independent */
        u_char        tno;
        u_char        point;
        struct CDMSF  address;
        u_char        zero;
        struct CDMSF  p;
};

struct CDTOC {
        u_short            length;  /* in native cpu endian */
        u_char             first_session;
        u_char             last_session;
        struct CDTOC_Desc  trackdesc[1];
};

#define MSF_TO_LBA(msf)         \
        (((((msf).minute * 60UL) + (msf).second) * 75UL) + (msf).frame - 150)

u_char isonullname[] = "\0";

struct vfsops cd9660_vfsops = {
        cd9660_mount,
        cd9660_start,
        cd9660_unmount,
        cd9660_root,
        NULL,                   /* quotactl */
        cd9660_vfs_getattr,
        cd9660_sync,
        cd9660_vget,
        cd9660_fhtovp,
        cd9660_vptofh,
        cd9660_init,
        cd9660_sysctl
};

/*
 * 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_mountfs(struct vnode *devvp, struct mount *mp, struct user_iso_args *argp,
                       vfs_context_t context);

static void DRGetTypeCreatorAndFlags(
                                struct iso_mnt * theMountPointPtr,
                                struct iso_directory_record * theDirRecPtr, 
                                u_int32_t * theTypePtr, 
                                u_int32_t * theCreatorPtr, 
                                u_int16_t * theFlagsPtr);

int
cd9660_mountroot(mount_t mp, vnode_t rvp, vfs_context_t context)
{
        int     error;
        struct user_iso_args args;

        args.flags = ISOFSMNT_ROOT;
        args.ssector = 0;
        args.toc_length = 0;
        args.toc = USER_ADDR_NULL;

        if ((error = iso_mountfs(rvp, mp, &args, context)))
                return (error);

        (void)cd9660_statfs(mp, vfs_statfs(mp), context);

        return (0);
}

/*
 * VFS Operations.
 *
 * mount system call
 */
int
cd9660_mount(mount_t mp, vnode_t devvp, user_addr_t data, vfs_context_t context)
{
        struct user_iso_args args;
        int error;
        struct iso_mnt *imp = NULL;

        if (vfs_context_is64bit(context)) {
                error = copyin(data, (caddr_t)&args, sizeof (args));
        }
        else {
                struct iso_args temp;
                error = copyin(data, (caddr_t)&temp, sizeof (temp));
                args.flags = temp.flags;
                args.ssector = temp.ssector;
                args.toc_length = temp.toc_length;
                args.toc = CAST_USER_ADDR_T(temp.toc);
        }
        if (error)
                return (error);
        
        if (vfs_isrdwr(mp))
                return (EROFS);

        /*
         * If updating, check whether changing from read-only to
         * read/write; if there is no device name, that's all we do.
         */
        if (vfs_isupdate(mp)) {
                imp = VFSTOISOFS(mp);
                if (devvp == 0)
                        return (0);
        }
        if ( !vfs_isupdate(mp))
                error = iso_mountfs(devvp, mp, &args, context);
        else {
                if (devvp != imp->im_devvp)
                        error = EINVAL; /* needs translation */
        }
        if (error) {
                return (error);
        }

        /* Indicate that we don't support volfs */
        vfs_clearflags(mp, MNT_DOVOLFS);

        return (0);
}

/*
 * Find the BSD device for the physical disk corresponding to the
 * mount point's device.  We use this physical device to read whole
 * (2352 byte) sectors from the CD to get the content for the video
 * files (tracks).
 *
 * The "path" argument is the path to the block device that the volume
 * is being mounted on (args.fspec).  It should be of the form:
 *      /dev/disk1s0
 * where the last "s0" part is stripped off to determine the physical
 * device's path.  It is assumed to be in user memory.
 */
static struct vnode *
cd9660_phys_device(mount_t mp, vfs_context_t context)
{
        int err;
        char whole_path[64];    // path to "whole" device
        char *s, *saved;
        struct nameidata nd;
        struct vnode *result;
        struct vfsstatfs * sfs;
        
        sfs = vfs_statfs(mp);
        result = NULL;

        if (strlen(sfs->f_mntfromname) >= sizeof(whole_path))
                return (NULL);

        /* Make a copy of the mount from name, then remove trailing "s...". */
        strncpy(whole_path, sfs->f_mntfromname, sizeof(whole_path)-1); 
        
        /*
         * I would use strrchr or rindex here, but those are declared __private_extern__,
         * and can't be used across component boundaries at this time.
         */
        for (s=whole_path, saved=NULL; *s; ++s)
                if (*s == 's')
                        saved = s;
        *saved = '\0';

        /* Lookup the "whole" device. */
        NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, CAST_USER_ADDR_T(whole_path), context);
        err = namei(&nd);
        if (err) {
                printf("isofs: Cannot find physical device: %s\n", whole_path);
                goto done;
        }
        nameidone(&nd);

        /* Open the "whole" device. */
        err = VNOP_OPEN(nd.ni_vp, FREAD, context);
        if (err) {
                vnode_put(nd.ni_vp);
                printf("isofs: Cannot open physical device: %s\n", whole_path);
                goto done;
        }
        result = nd.ni_vp;
done:
        return result;
}


/*
 * See if the given CD-ROM XA disc appears to be a Video CD
 * (version < 2.0; so, not SVCD).  If so, fill in the extent
 * information for the MPEGAV directory, set the VCD flag,
 * and return true.
 */
static int
cd9660_find_video_dir(struct iso_mnt *isomp)
{
        int result, err;
        struct vnode *rvp = NULL;
        struct vnode *videovp = NULL;
        struct componentname cn;
        struct vfs_context context;
        char dirname[] = "MPEGAV";
        
        result = 0;             /* Assume not a video CD */
        
        err = cd9660_root(isomp->im_mountp, &rvp, NULL);
        if (err) {
                printf("cd9660_find_video_dir: cd9660_root failed (%d)\n", err);
                return 0;       /* couldn't find video dir */
        }
        
        context.vc_proc = current_proc();
        context.vc_ucred = kauth_cred_get();

        cn.cn_nameiop = LOOKUP;
        cn.cn_flags = ISLASTCN;
        cn.cn_context = &context;
        cn.cn_pnbuf = dirname;
        cn.cn_pnlen = sizeof(dirname)-1;
        cn.cn_nameptr = cn.cn_pnbuf;
        cn.cn_namelen = cn.cn_pnlen;
        
        err = VNOP_LOOKUP(rvp, &videovp, &cn, &context);
        if (err == 0) {
                struct iso_node *ip = VTOI(videovp);
                result = 1;             /* Looks like video CD */
                isomp->video_dir_start = ip->iso_start;
                isomp->video_dir_end = ip->iso_start + (ip->i_size >> isomp->im_bshift);
                isomp->im_flags2 |= IMF2_IS_VCD;

                vnode_put(videovp);
        }
        vnode_put(rvp);
        
        return result;
}

/*
 * Common code for mount and mountroot
 */
static int
iso_mountfs(devvp, mp, argp, context)
        register struct vnode *devvp;
        struct mount *mp;
        struct user_iso_args *argp;
        vfs_context_t context;
{
        struct proc *p;
        register struct iso_mnt *isomp = (struct iso_mnt *)0;
        struct buf *bp = NULL;
        struct buf *pribp = NULL, *supbp = NULL;
        dev_t dev = vnode_specrdev(devvp);
        int error = EINVAL;
        int breaderr = 0;
        u_long iso_bsize;
        int iso_blknum;
        int joliet_level;
        struct iso_volume_descriptor *vdp = NULL;
        struct iso_primary_descriptor *pri = NULL;
        struct iso_primary_descriptor *sup = NULL;
        struct iso_directory_record *rootp;
        int logical_block_size;
        u_int8_t vdtype;
        int blkoff = argp->ssector;
        
        if (vfs_isrdwr(mp))
                return (EROFS);

        /* 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;

        /* tell IOKit that we're assuming 2K sectors */
        if ((error = VNOP_IOCTL(devvp, DKIOCSETBLOCKSIZE,
             (caddr_t)&iso_bsize, FWRITE, context)))
                return (error);

        joliet_level = 0;
        for (iso_blknum = 16 + blkoff; iso_blknum < (100 + blkoff); iso_blknum++) {
                if ((error = (int)buf_bread(devvp, (daddr64_t)((unsigned)iso_blknum), iso_bsize, NOCRED, &bp))) {
                        if (bp) {
                                buf_markaged(bp);
                                buf_brelse(bp);
                                bp = NULL;
                        }
                        breaderr = error;
                        printf("iso_mountfs: buf_bread error %d reading block %d\n", error, iso_blknum);
                        continue;
                }

                vdp = (struct iso_volume_descriptor *)buf_dataptr(bp);
                if (bcmp (vdp->volume_desc_id, ISO_STANDARD_ID, sizeof(vdp->volume_desc_id)) != 0) {
#ifdef DEBUG
                        printf("cd9660_vfsops.c: iso_mountfs: "
                                        "Invalid ID in volume desciptor.\n");
#endif
                        /* There should be a primary volume descriptor followed by any
                         * secondary volume descriptors, then an end volume descriptor.
                         * Some discs are mastered without an end volume descriptor or
                         * they have the type field set and the volume descriptor ID is
                         * not set. If we at least found a primary volume descriptor,
                         * mount the disc.
                         */
                        if (pri != NULL)
                                break;
                        
                        error = EINVAL;
                        goto out;
                }
                
                vdtype = isonum_711 (vdp->type);
                if (vdtype == ISO_VD_END) 
                        break;

                if (vdtype == ISO_VD_PRIMARY) {
                        if (pribp == NULL) {
                                pribp = bp;
                                bp = NULL;
                                pri = (struct iso_primary_descriptor *)vdp;
                        }
                } else if(vdtype == ISO_VD_SUPPLEMENTARY) {
                        if (supbp == NULL) {
                                supbp = bp;
                                bp = NULL;
                                sup = (struct iso_primary_descriptor *)vdp;

                                if ((argp->flags & ISOFSMNT_NOJOLIET) == 0) {
                                        /*
                                         * some Joliet CDs are "out-of-spec and don't correctly
                                         * set the SVD flags. We ignore the flags and rely soely
                                         * on the escape_seq
                                         */
                                        if (bcmp(sup->escape_seq, ISO_UCS2_Level_1, 3) == 0)
                                                joliet_level = 1;
                                        else if (bcmp(sup->escape_seq, ISO_UCS2_Level_2, 3) == 0)
                                                joliet_level = 2;
                                        else if (bcmp(sup->escape_seq, ISO_UCS2_Level_3, 3) == 0)
                                                joliet_level = 3;
                                }
                        }
                }

                if (bp) {
                        buf_markaged(bp);
                        buf_brelse(bp);
                        bp = NULL;
                }
        }

        if (bp) {
                buf_markaged(bp);
                buf_brelse(bp);
                bp = NULL;
        }
        
        if (pri == NULL) {
                if (breaderr)
                        error = breaderr;
                else
                        error = EINVAL;
                goto out;
        }
        
        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) {
                error = EINVAL;
                goto out;
        }
        
        rootp = (struct iso_directory_record *)pri->root_directory_record;
        
        MALLOC(isomp, struct iso_mnt *, sizeof *isomp, M_ISOFSMNT, M_WAITOK);
        bzero((caddr_t)isomp, sizeof *isomp);
        isomp->im_sector_size = ISO_DEFAULT_BLOCK_SIZE;
        isomp->logical_block_size = logical_block_size;
        isomp->volume_space_size = isonum_733 (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 += blkoff;
        bcopy (rootp, isomp->root, sizeof isomp->root);
        isomp->root_extent = isonum_733 (rootp->extent);
        isomp->root_size = isonum_733 (rootp->size);

        /*
         * getattrlist wants the volume name, create date and modify date
         */

        /* Remove any trailing white space */
        if ( strlen(pri->volume_id) ) {
                char            *myPtr;

                myPtr = pri->volume_id + strlen( pri->volume_id ) - 1;
                while ( *myPtr == ' ' && myPtr >= pri->volume_id ) {
                        *myPtr = 0x00;
                        myPtr--;
                }
        }

        if (pri->volume_id[0] == 0)
                strcpy(isomp->volume_id, ISO_DFLT_VOLUME_ID);
        else
                bcopy(pri->volume_id, isomp->volume_id, sizeof(isomp->volume_id));
        cd9660_tstamp_conv17(pri->creation_date, &isomp->creation_date);
        cd9660_tstamp_conv17(pri->modification_date, &isomp->modification_date);

        /* See if this is a CD-XA volume */
        if (bcmp( pri->CDXASignature, ISO_XA_ID,
                        sizeof(pri->CDXASignature) ) == 0 ) {
                isomp->im_flags2 |= IMF2_IS_CDXA;
        }

        isomp->im_bmask = logical_block_size - 1;
        isomp->im_bshift = 0;
        while ((1 << isomp->im_bshift) < isomp->logical_block_size)
                isomp->im_bshift++;

        buf_markaged(pribp);
        buf_brelse(pribp);
        pribp = NULL;

        vfs_setfsprivate(mp, (void *)isomp);
        vfs_statfs(mp)->f_fsid.val[0] = (long)dev;
        vfs_statfs(mp)->f_fsid.val[1] = vfs_typenum(mp);
        vfs_setmaxsymlen(mp, 0);
        vfs_setflags(mp, MNT_LOCAL);

        isomp->im_mountp = mp;
        isomp->im_dev = dev;
        isomp->im_devvp = devvp;        

        /*
         * If the logical block size is not 2K then we must
         * set the block device's physical block size to this
         * disc's logical block size.
         *
         */
        if (logical_block_size != iso_bsize) {
                iso_bsize = logical_block_size;
                if ((error = VNOP_IOCTL(devvp, DKIOCSETBLOCKSIZE,
                     (caddr_t)&iso_bsize, FWRITE, context)))
                        goto out;
        }
        
        /* Check the Rock Ridge Extention support */
        if (!(argp->flags & ISOFSMNT_NORRIP)) {
                if ( (error = (int)buf_bread(isomp->im_devvp,
                                             (daddr64_t)((unsigned)((isomp->root_extent + isonum_711(rootp->ext_attr_length)))),
                                             isomp->logical_block_size, NOCRED, &bp)) ) {

                        printf("iso_mountfs: buf_bread error %d reading block %d\n",
                           error, isomp->root_extent + isonum_711(rootp->ext_attr_length));
                        argp->flags |= ISOFSMNT_NORRIP;
                        goto skipRRIP;
                }
                rootp = (struct iso_directory_record *)buf_dataptr(bp);
                
                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...
                 */
                buf_markaged(bp);
                buf_brelse(bp);
                bp = NULL;
        }
skipRRIP:

        isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
                                         ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);

        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;
        }
        
        /* Decide whether to use the Joliet descriptor */

        if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level != 0) {
                char vol_id[32];
                int i, convflags;
                size_t convbytes;
                u_int16_t *uchp;
                
                /*
                 * On Joliet CDs use the UCS-2 volume identifier.
                 *
                 * This name can have up to 16 UCS-2 chars.
                 */
                convflags = UTF_DECOMPOSED;
                if (BYTE_ORDER != BIG_ENDIAN)
                        convflags |= UTF_REVERSE_ENDIAN;
                uchp = (u_int16_t *)sup->volume_id;
                for (i = 0; i < 16 && uchp[i]; ++i);
                if ((utf8_encodestr((u_int16_t *)sup->volume_id, (i * 2), vol_id,
                        &convbytes, sizeof(vol_id), 0, convflags) == 0)
                        && convbytes && (vol_id[0] != ' ')) {
                        char * strp;

                        /* Remove trailing spaces */
                        strp = vol_id + convbytes - 1;
                        while (strp > vol_id && *strp == ' ')
                                *strp-- = '\0';
                        bcopy(vol_id, isomp->volume_id, convbytes + 1);
                }

                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);
                buf_markaged(supbp);
                isomp->iso_ftype = ISO_FTYPE_JOLIET;
        }

        if (supbp) {
                buf_brelse(supbp);
                supbp = NULL;
        }

        /* If there was a TOC in the arguments, copy it in. */
        if (argp->flags & ISOFSMNT_TOC) {
                MALLOC(isomp->toc, struct CDTOC *, argp->toc_length, M_ISOFSMNT, M_WAITOK);
                if ((error = copyin(argp->toc, isomp->toc, argp->toc_length)))
                        goto out;
        }

        /* See if this could be a Video CD */
        if ((isomp->im_flags2 & IMF2_IS_CDXA) && cd9660_find_video_dir(isomp)) {
                /* Get the 2352-bytes-per-block device. */
                isomp->phys_devvp = cd9660_phys_device(mp, context);
        }

        /* Fill the default statfs information */
        (void) cd9660_statfs(mp, vfs_statfs(mp), context);

        return (0);
out:
        if (bp)
                buf_brelse(bp);
        if (pribp)
                buf_brelse(pribp);
        if (supbp)
                buf_brelse(supbp);

        if (isomp) {
                if (isomp->toc)
                        FREE((caddr_t)isomp->toc, M_ISOFSMNT);
                FREE((caddr_t)isomp, M_ISOFSMNT);

                vfs_setfsprivate(mp, (void *)0);
        }
        return (error);
}

/*
 * Make a filesystem operational.
 * Nothing to do at the moment.
 */
/* ARGSUSED */
int
cd9660_start(__unused struct mount *mp, __unused int flags,
             __unused vfs_context_t context)
{
        return (0);
}

/*
 * unmount system call
 */
int
cd9660_unmount(struct mount *mp, int mntflags, vfs_context_t context)
{
        register struct iso_mnt *isomp;
        int error, flags = 0;
        int force = 0;
        
        if ( (mntflags & MNT_FORCE) ) {
                flags |= FORCECLOSE;
                force = 1;
        }

        if ( (error = vflush(mp, NULLVP, flags)) && !force )
                return (error);

        isomp = VFSTOISOFS(mp);

#ifdef  ISODEVMAP
        if (isomp->iso_ftype == ISO_FTYPE_RRIP)
                iso_dunmap(isomp->im_dev);
#endif
        if (isomp->phys_devvp) {
                error = VNOP_CLOSE(isomp->phys_devvp, FREAD, context);
                if (error && !force)
                        return error;
                vnode_put(isomp->phys_devvp);
        }

        if (isomp->toc)
                FREE((caddr_t)isomp->toc, M_ISOFSMNT);
        FREE((caddr_t)isomp, M_ISOFSMNT);

        return (0);
}

/*
 * Return root of a filesystem
 */
int
cd9660_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t context)
{
        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, NULL, NULL,
                imp->iso_ftype == ISO_FTYPE_RRIP, dp, current_proc()));
}

/*
 * Get file system statistics.
 */
/* ARGSUSED */
int
cd9660_statfs(struct mount *mp, register struct vfsstatfs *sbp,
              __unused vfs_context_t context)
{
        register struct iso_mnt *isomp;
        
        isomp = VFSTOISOFS(mp);

#if 0
#ifdef COMPAT_09
        sbp->f_type = 5;
#else
        sbp->f_type = 0;
#endif
#endif
        sbp->f_bsize = (uint32_t)isomp->logical_block_size;
        sbp->f_iosize = (size_t)sbp->f_bsize;   /* XXX */
        sbp->f_blocks = (uint64_t)((unsigned long)isomp->volume_space_size);
        sbp->f_bfree = (uint64_t)0; /* total free blocks */
        sbp->f_bavail = (uint64_t)0; /* blocks free for non superuser */
        sbp->f_files =  (uint64_t)0; /* total files */
        sbp->f_ffree = (uint64_t)0; /* free file nodes */
        sbp->f_fstypename[(MFSTYPENAMELEN - 1)] = '\0';

        /*
         * Subtypes (flavors) for ISO 9660
         *   0:   ISO-9660
         *   1:   ISO-9660 (Joliet) 
         *   2:   ISO-9660 (Rockridge) 
         */
        if (isomp->iso_ftype == ISO_FTYPE_JOLIET)
                sbp->f_fssubtype = 1;
        else if (isomp->iso_ftype == ISO_FTYPE_RRIP)
                sbp->f_fssubtype = 2;
        else
                sbp->f_fssubtype = 0;

        /* DO NOT use the first spare for flags; it's been reassigned for another use: */
        /* sbp->f_spare[0] = isomp->im_flags; */

        return (0);
}

int cd9660_vfs_getattr(struct mount *mp, struct vfs_attr *fsap, vfs_context_t context)
{
        struct iso_mnt *imp;
        struct vfsstatfs *stats = vfs_statfs(mp);

        imp = VFSTOISOFS(mp);

        /*
         * We don't know reasonable values for f_objcount, f_filecount,
         * f_dircount, f_maxobjcount so don't bother making up (poor)
         * numbers like 10.3.x and earlier did.
         */
        
        VFSATTR_RETURN(fsap, f_iosize, stats->f_iosize);
        VFSATTR_RETURN(fsap, f_blocks, stats->f_blocks);
        VFSATTR_RETURN(fsap, f_bfree,  stats->f_bfree);
        VFSATTR_RETURN(fsap, f_bavail, stats->f_bavail);
        VFSATTR_RETURN(fsap, f_bused,  stats->f_blocks);
        
        /* We don't have file counts, so don't return them */
        
        /* f_fsid and f_owner should be handled by VFS */
        
        /* We don't have a value for f_uuid */
        
        if (VFSATTR_IS_ACTIVE(fsap, f_capabilities)) {
                fsap->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] =
                        (imp->iso_ftype == ISO_FTYPE_RRIP ? VOL_CAP_FMT_SYMBOLICLINKS : 0) |
                        (imp->iso_ftype == ISO_FTYPE_RRIP ? VOL_CAP_FMT_HARDLINKS : 0) |
                        (imp->iso_ftype == ISO_FTYPE_RRIP || imp->iso_ftype == ISO_FTYPE_JOLIET
                                ? VOL_CAP_FMT_CASE_SENSITIVE : 0) |
                        VOL_CAP_FMT_CASE_PRESERVING |
                        VOL_CAP_FMT_FAST_STATFS;
                fsap->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] =
                        VOL_CAP_INT_ATTRLIST |
                        VOL_CAP_INT_NFSEXPORT;
                fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED1] = 0;
                fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED2] = 0;
                
                fsap->f_capabilities.valid[VOL_CAPABILITIES_FORMAT] =
                        VOL_CAP_FMT_PERSISTENTOBJECTIDS |
                        VOL_CAP_FMT_SYMBOLICLINKS |
                        VOL_CAP_FMT_HARDLINKS |
                        VOL_CAP_FMT_JOURNAL |
                        VOL_CAP_FMT_JOURNAL_ACTIVE |
                        VOL_CAP_FMT_NO_ROOT_TIMES |
                        VOL_CAP_FMT_SPARSE_FILES |
                        VOL_CAP_FMT_ZERO_RUNS |
                        VOL_CAP_FMT_CASE_SENSITIVE |
                        VOL_CAP_FMT_CASE_PRESERVING |
                        VOL_CAP_FMT_FAST_STATFS | 
                        VOL_CAP_FMT_2TB_FILESIZE;
                fsap->f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] =
                        VOL_CAP_INT_SEARCHFS |
                        VOL_CAP_INT_ATTRLIST |
                        VOL_CAP_INT_NFSEXPORT |
                        VOL_CAP_INT_READDIRATTR |
                        VOL_CAP_INT_EXCHANGEDATA |
                        VOL_CAP_INT_COPYFILE |
                        VOL_CAP_INT_ALLOCATE |
                        VOL_CAP_INT_VOL_RENAME |
                        VOL_CAP_INT_ADVLOCK |
                        VOL_CAP_INT_FLOCK;
                fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED1] = 0;
                fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED2] = 0;
                
                VFSATTR_SET_SUPPORTED(fsap, f_capabilities);
        }
        
        if (VFSATTR_IS_ACTIVE(fsap, f_attributes)) {
                /*
                 * VFS should really set these based on the vfs_attr and vnop_attr
                 * fields the file system supports, combined with the conversions
                 * VFS has implemented.
                 */

                fsap->f_attributes.validattr.commonattr = ATTR_CMN_VALIDMASK;
        fsap->f_attributes.validattr.volattr = ATTR_VOL_VALIDMASK;
        fsap->f_attributes.validattr.dirattr = ATTR_DIR_VALIDMASK;
        fsap->f_attributes.validattr.fileattr = ATTR_FILE_VALIDMASK;
        fsap->f_attributes.validattr.forkattr = ATTR_FORK_VALIDMASK;

                fsap->f_attributes.nativeattr.commonattr = ATTR_CMN_VALIDMASK;
        fsap->f_attributes.nativeattr.volattr = ATTR_VOL_VALIDMASK;
        fsap->f_attributes.nativeattr.dirattr = ATTR_DIR_VALIDMASK;
        fsap->f_attributes.nativeattr.fileattr = ATTR_FILE_VALIDMASK;
        fsap->f_attributes.nativeattr.forkattr = ATTR_FORK_VALIDMASK;

                VFSATTR_SET_SUPPORTED(fsap, f_attributes);
        }
        
        VFSATTR_RETURN(fsap, f_create_time, imp->creation_date);
        VFSATTR_RETURN(fsap, f_modify_time, imp->modification_date);
        /* No explicit access time, so let VFS pick a default value */
        /* No explicit backup time, so let VFS pick a default value */
        
        return 0;
}

/* ARGSUSED */
int
cd9660_sync(__unused struct mount *mp, __unused int waitfor,
            __unused vfs_context_t context)
{

        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 {
        int     ifid_ino;
        long    ifid_start;
};

/* ARGSUSED */
int
cd9660_fhtovp(mount_t mp, int fhlen, unsigned char *fhp, vnode_t *vpp, vfs_context_t context)
{
        struct ifid *ifhp = (struct ifid *)fhp;
        register struct iso_node *ip;
        struct vnode *nvp;
        int error;
        
        if (fhlen < (int)sizeof(struct ifid))
                return (EINVAL);

#ifdef  ISOFS_DBG
        printf("fhtovp: ino %d, start %ld\n",
               ifhp->ifid_ino, ifhp->ifid_start);
#endif
        
        if ( (error = VFS_VGET(mp, (ino64_t)ifhp->ifid_ino, &nvp, context)) ) {
                *vpp = NULLVP;
                return (error);
        }
        ip = VTOI(nvp);
        if (ip->inode.iso_mode == 0) {
                vnode_put(nvp);
                *vpp = NULLVP;
                return (ESTALE);
        }
        *vpp = nvp;
        return (0);
}

/*
 * Scan the TOC for the track which contains the given sector.
 *
 * If there is no matching track, or no TOC, then return -1.
 */
static int
cd9660_track_for_sector(struct CDTOC *toc, u_int sector)
{
        int i, tracks, result;
        
        if (toc == NULL)
                return -1;

        tracks = toc->length / sizeof(struct CDTOC_Desc);
        
        result = -1;            /* Sentinel in case we don't find the right track. */
        for (i=0; i<tracks; ++i) {
                if (toc->trackdesc[i].point < 100 && MSF_TO_LBA(toc->trackdesc[i].p) <= sector) {
                        result = toc->trackdesc[i].point;
                }
        }
        
        return result;
}

/*
 * Determine whether the given node is really a video CD video
 * file.  Return non-zero if it appears to be a video file.
 */
static int
cd9660_is_video_file(struct iso_node *ip, struct iso_mnt *imp)
{
        int lbn;
        int track;
        
        /* Check whether this could really be a Video CD at all */
        if (((imp->im_flags2 & IMF2_IS_VCD) == 0) ||
                imp->phys_devvp == NULL ||
                imp->toc == NULL)
        {
                return 0;       /* Doesn't even look like VCD... */
        }

        /* Make sure it is a file */
        if ((ip->inode.iso_mode & S_IFMT) != S_IFREG)
                return 0;       /* Not even a file... */

        /*
         * And in the right directory.  This assumes the same inode
         * number convention that cd9660_vget_internal uses (that
         * part of the inode number is the block containing the
         * file's directory entry).
         */
        lbn = lblkno(imp, ip->i_number);
        if (lbn < imp->video_dir_start || lbn >= imp->video_dir_end)
                return 0;       /* Not in the correct directory */
        
        /*
         * If we get here, the file should be a video file, but
         * do a couple of extra sanity checks just to be sure.
         * First, verify the form of the name
         */
        if (strlen(ip->i_namep) != 11 ||                /* Wrong length? */
                bcmp(ip->i_namep+7, ".DAT", 4) ||       /* Wrong extension? */
                (bcmp(ip->i_namep, "AVSEQ", 5) &&       /* Wrong beginning? */
                 bcmp(ip->i_namep, "MUSIC", 5)))
        {
                return 0;       /* Invalid name format */
        }
        
        /*
         * Verify that AVSEQnn.DAT is in track #(nn+1).  This would
         * not be appropriate for Super Video CD, which allows
         * multiple sessions, so the track numbers might not
         * match up like this. 
         */
        track = (ip->i_namep[5] - '0') * 10 + ip->i_namep[6] - '0';
        if (track != (cd9660_track_for_sector(imp->toc, ip->iso_start) - 1))
        {
                return 0;       /* Wrong number in name */
        }

        /* It must be a video file if we got here. */
        return 1;
}

int
cd9660_vget(struct mount *mp, ino64_t ino, struct vnode **vpp, __unused vfs_context_t context)
{
        /*
         * 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_t)ino, vpp, NULL, NULL,
                                       0, (struct iso_directory_record *) 0, current_proc()) );
}

int
cd9660_vget_internal(mount_t mp, ino_t ino, vnode_t *vpp, vnode_t dvp,
                     struct componentname *cnp, int relocated,
                     struct iso_directory_record *isodir, proc_t p)
{
        register struct iso_mnt *imp;
        struct iso_node *ip;
        buf_t   bp = NULL;
        vnode_t vp;
        dev_t   dev;
        int     error;
        struct vnode_fsparam vfsp;
        enum vtype vtype;
        int is_video_file = 0;

        *vpp = NULLVP;
        imp  = VFSTOISOFS(mp);
        dev  = imp->im_dev;
#if 0
        /* Check for unmount in progress */
        if (mp->mnt_kern_flag & MNTK_UNMOUNT)
                return (EPERM);
#endif

        MALLOC_ZONE(ip, struct iso_node *, sizeof(struct iso_node),
                    M_ISOFSNODE, M_WAITOK);
        /*
         * MALLOC_ZONE may block, so check for the inode being 
         * present in the hash after we get back...
         * we also assume that we're under a filesystem lock
         * so that we're not reentered between the ihashget and
         * the ihashins...
         */
        if ((*vpp = cd9660_ihashget(dev, ino, p)) != NULLVP) {
                FREE_ZONE(ip, sizeof(struct iso_node), M_ISOFSNODE);
                return (0);
        }
        bzero((caddr_t)ip, sizeof(struct iso_node));

        ip->i_dev = dev;
        ip->i_number = ino;
        ip->i_namep = &isonullname[0];
        ip->i_mnt = imp;
        ip->i_devvp = imp->im_devvp;

        SET(ip->i_flag, ISO_INALLOC);
        /*
         * 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) {
                        printf("fhtovp: lbn exceed volume space %d\n", lbn);
                        error = ESTALE;
                        goto errout;
                }
                off = blkoff(imp, ino);

                if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
                        printf("fhtovp: crosses block boundary %d\n",
                                off + ISO_DIRECTORY_RECORD_SIZE);
                        error = ESTALE;
                        goto errout;
                }
        
                error = (int)buf_bread(imp->im_devvp, (daddr64_t)((unsigned)lbn),
                                       imp->logical_block_size, NOCRED, &bp);
                if (error) {
                        printf("fhtovp: buf_bread error %d\n",error);
                        goto errout;
                }
                isodir = (struct iso_directory_record *)(buf_dataptr(bp) + off);

                if (off + isonum_711(isodir->length) > imp->logical_block_size) {
                        printf("fhtovp: directory crosses block boundary "
                                "%d[off=%d/len=%d]\n",
                                off +isonum_711(isodir->length), off,
                                isonum_711(isodir->length));
                        error = ESTALE;
                        goto errout;
                }

                /*
                 * for directories we can get parentID from adjacent 
                 * parent directory record
                 */
                if ((isonum_711(isodir->flags) & directoryBit)
                                && (isodir->name[0] == 0)) {
                        struct iso_directory_record *pdp;

                        pdp = (struct iso_directory_record *)
                                        ((char *)buf_dataptr(bp) + isonum_711(isodir->length));
                        if ((isonum_711(pdp->flags) & directoryBit)
                                        && (pdp->name[0] == 1))
                                ip->i_parent = isodirino(pdp, imp);
                }
        }
        if (relocated) {
                daddr64_t lbn;

                if (bp) {
                        buf_brelse(bp);
                        bp = NULL;
                }
                /*
                 * On relocated directories we must
                 * read the `.' entry out of a dir.
                 */
                ip->iso_start = ino >> imp->im_bshift;
                /*
                 * caclulate the correct lbn to read block 0
                 * of this node... this used to be a cd9660_blkatoff, but
                 * that requires the vnode to already be 'cooked'... in
                 * the new world, we don't create a vnode until the inode
                 * has been fully initialized... cd9660_blkatoff generates
                 * a buf_bread for im_sector_size associated with the node's vp
                 * I'm replacing it with a buf_bread for the same size and from
                 * the same location on the disk, but associated with the devvp
                 */
                lbn = (daddr64_t)((unsigned)ip->iso_start) + 0;

                if ((error = (int)buf_bread(imp->im_devvp, lbn, imp->im_sector_size, NOCRED, &bp)))
                        goto errout;

                isodir = (struct iso_directory_record *)buf_dataptr(bp);
        }

        /*
         * go get apple extensions to ISO directory record or use
         * defaults when there are no apple extensions.
         */
        if ( ((isonum_711( isodir->flags ) & directoryBit) == 0) &&
             (imp->iso_ftype != ISO_FTYPE_RRIP) ) {
                /* This is an ISO directory record for a file */
                DRGetTypeCreatorAndFlags(imp, isodir, &ip->i_FileType, 
                                         &ip->i_Creator, &ip->i_FinderFlags);

                if (isonum_711(isodir->flags) & associatedBit)
                        ip->i_flag |= ISO_ASSOCIATED;
        }

        /*
         * Shadow the ISO 9660 invisible state to the FinderInfo
         */
        if (isonum_711(isodir->flags) & existenceBit) {
                ip->i_FinderFlags |= fInvisibleBit;
        }

        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;
        /*
         * account for AppleDouble header
         */
        if (ip->i_flag & ISO_ASSOCIATED)
                ip->i_size += ADH_SIZE;

        /*
         * if we have a valid name, fill in i_namep with UTF-8 name
         */
        if (isonum_711(isodir->name_len) != 0) {
                u_char *utf8namep;
                u_short namelen;
                ino_t inump = 0;

                MALLOC(utf8namep, u_char *, ISO_RRIP_NAMEMAX + 1, M_TEMP, M_WAITOK);
                namelen = isonum_711(isodir->name_len);

                switch (imp->iso_ftype) {
                case ISO_FTYPE_RRIP:
                        cd9660_rrip_getname(isodir, utf8namep, &namelen, &inump, imp);
                        break;

                case ISO_FTYPE_JOLIET:
                        ucsfntrans((u_int16_t *)isodir->name, namelen,
                                   utf8namep, &namelen,
                                   isonum_711(isodir->flags) & directoryBit, ip->i_flag & ISO_ASSOCIATED);
                        break;

                default:
                        isofntrans (isodir->name, namelen,
                                        utf8namep, &namelen,
                                        imp->iso_ftype == ISO_FTYPE_9660, ip->i_flag & ISO_ASSOCIATED);
                }

                utf8namep[namelen] = '\0';
                MALLOC(ip->i_namep, u_char *, namelen + 1, M_TEMP, M_WAITOK);
                bcopy(utf8namep, ip->i_namep, namelen + 1);
                FREE(utf8namep, M_TEMP);
        }

        /*
         * Setup time stamp, attribute
         */
        switch (imp->iso_ftype) {
        default:        /* ISO_FTYPE_9660 */
                {
                buf_t   bp2 = NULL;
                daddr64_t lbn;
                int     off;

                if ((imp->im_flags & ISOFSMNT_EXTATT) && (off = isonum_711(isodir->ext_attr_length))) {

                        lbn = (daddr64_t)((unsigned)ip->iso_start - off);

                        if ((error = (int)buf_bread(imp->im_devvp, lbn, imp->im_sector_size, NOCRED, &bp2))) {
                                if (bp2)
                                        buf_brelse(bp2);
                                goto errout;
                        }
                } else
                        bp2 = NULL;

                cd9660_defattr(isodir, ip, bp2);
                cd9660_deftstamp(isodir, ip, bp2);

                if (bp2)
                        buf_brelse(bp2);
                break;
                }
        case ISO_FTYPE_RRIP:
                cd9660_rrip_analyze(isodir, ip, imp);
                break;
        }
        /*
         * See if this is a Video CD file.  If so, we must adjust the
         * length to account for larger sectors plus the RIFF header.
         * We also must substitute the vnop_read and vnop_pagein functions.
         *
         * The cd9660_is_video_file routine assumes that the inode has
         * been completely set up; it refers to several fields.
         *
         * This must be done before we release bp, because isodir
         * points into bp's data.
         */
        if (cd9660_is_video_file(ip, imp))
        {
                cd9660_xa_init(ip, isodir);
                
                is_video_file = 1;
        }
        if (ip->iso_extent == imp->root_extent) {
                ip->i_parent = 1;       /* root's parent is always 1 by convention */
                /* mode type must be S_IFDIR */
                ip->inode.iso_mode = (ip->inode.iso_mode & ~S_IFMT) | S_IFDIR;
        }
        vtype = IFTOVT(ip->inode.iso_mode);
#if !FIFO
        if (vtype == VFIFO) {
                error = ENOTSUP;
                goto errout;
        }
#endif
#ifdef  ISODEVMAP
        if (vtype == VCHR || vtype == VBLK) {
                struct iso_dnode *dp;

                if (dp = iso_dmap(dev, ino, 0))
                        ip->inode.iso_rdev = dp->d_dev;
        }
#endif
        /*
         * create the associated vnode
         */
        //bzero(&vfsp, sizeof(struct vnode_fsparam));
        vfsp.vnfs_mp = mp;
        vfsp.vnfs_vtype = vtype;
        vfsp.vnfs_str = "cd9660";
        vfsp.vnfs_dvp = dvp;
        vfsp.vnfs_fsnode = ip;
        vfsp.vnfs_cnp = cnp;

        if (is_video_file)
                vfsp.vnfs_vops = cd9660_cdxaop_p;
        else if (vtype == VFIFO )
                vfsp.vnfs_vops = cd9660_fifoop_p;
        else if (vtype == VBLK || vtype == VCHR)
                vfsp.vnfs_vops = cd9660_specop_p;
        else
                vfsp.vnfs_vops = cd9660_vnodeop_p;
                
        if (vtype == VBLK || vtype == VCHR)
                vfsp.vnfs_rdev = ip->inode.iso_rdev;
        else
                vfsp.vnfs_rdev = 0;

        vfsp.vnfs_filesize = ip->i_size;

        if (dvp && cnp && (cnp->cn_flags & MAKEENTRY))
                vfsp.vnfs_flags = 0;
        else
                vfsp.vnfs_flags = VNFS_NOCACHE;

        /* Tag root directory */
        if (ip->iso_extent == imp->root_extent)
                vfsp.vnfs_markroot = 1;
        else    
                vfsp.vnfs_markroot = 0;

        vfsp.vnfs_marksystem = 0;

        if ( (error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &vp)) )
                goto errout;

        ip->i_vnode = vp;

        vnode_ref(ip->i_devvp);
        vnode_addfsref(vp);
        vnode_settag(vp, VT_ISOFS);

        if (bp)
                buf_brelse(bp);
        *vpp = vp;

        CLR(ip->i_flag, ISO_INALLOC);

        if (ISSET(ip->i_flag, ISO_INWALLOC))
                wakeup(ip);

        return (0);

errout:
        if (bp)
                buf_brelse(bp);
        cd9660_ihashrem(ip);

        if (ISSET(ip->i_flag, ISO_INWALLOC))
                wakeup(ip);

        FREE_ZONE(ip, sizeof(struct iso_node), M_ISOFSNODE);

        return (error);
}


/************************************************************************
 *
 *  Function:   DRGetTypeCreatorAndFlags
 *
 *  Purpose:    Set up the fileType, fileCreator and fileFlags
 *
 *  Returns:    none
 *
 *  Side Effects:       sets *theTypePtr, *theCreatorPtr, and *theFlagsPtr
 *
 *  Description:
 *
 *  Revision History:
 *      28 Jul 88       BL¡B   Added a new extension type of 6, which allows
 *                                              the specification of four of the finder flags.
 *                                              We let the creator of the disk just copy over
 *                                              the finder flags, but we only look at always
 *                                              switch launch, system, bundle, and locked bits.
 *      15 Aug 88       BL¡B   The Apple extensions to ISO 9660 implemented the
 *                                              padding field at the end of a directory record
 *                                              incorrectly.
 *      19 Jul 89       BG              Rewrote routine to handle the "new" Apple
 *                                              Extensions definition, as well as take into
 *                                              account the possibility of "other" definitions.
 *      02 Nov 89       BG              Corrected the 'AA' SystemUseID processing to
 *                                              check for SystemUseID == 2 (HFS).  Was incorrectly
 *                                              checking for SystemUseID == 1 (ProDOS) before.
 *      18 Mar 92       CMP             Fixed the check for whether len_fi was odd or even.
 *                                              Before it would always assume even for an XA record.
 *      26 Dec 97       jwc             Swiped from MacOS implementation of ISO 9660 CD-ROM
 *                                              support and modified to work in MacOSX file system.
 *
 *********************************************************************** */
 
static void
DRGetTypeCreatorAndFlags(       struct iso_mnt * theMountPointPtr,
                                                        struct iso_directory_record * theDirRecPtr, 
                                                        u_int32_t * theTypePtr, 
                                                        u_int32_t * theCreatorPtr, 
                                                        u_int16_t * theFlagsPtr )
{
        int                                     foundStuff;
        u_int32_t                       myType;
        u_int32_t                       myCreator;
        AppleExtension          *myAppleExtPtr;
        NewAppleExtension       *myNewAppleExtPtr;
        u_int16_t                       myFinderFlags;
        char                            *myPtr;

        foundStuff = 1;
        myType = 0x3f3f3f3f;
        myCreator = 0x3f3f3f3f;
        myFinderFlags = 0;
        *theFlagsPtr = 0x0000;

        /*
         * handle the fact that our original apple extensions didn't take
         * into account the padding byte on a file name
         */

        myPtr = &theDirRecPtr->name[ (isonum_711(theDirRecPtr->name_len)) ];
        
        /* if string length is even, bump myPtr for padding byte */
        if ( ((isonum_711(theDirRecPtr->name_len)) & 0x01) == 0 )
                myPtr++;
        myAppleExtPtr = (AppleExtension *) myPtr;

        /*
         * checking for whether or not the new 'AA' code is being 
         * called (and if so, correctly)
         */
        if ( (isonum_711(theDirRecPtr->length)) <= 
                 ISO_DIRECTORY_RECORD_SIZE + (isonum_711(theDirRecPtr->name_len)) ) {
                foundStuff = 0;
                goto DoneLooking;
        }

        foundStuff = 0; /* now we default to *false* until we find a good one */
        myPtr = (char *) myAppleExtPtr;

        if ( (theMountPointPtr->im_flags2 & IMF2_IS_CDXA) != 0 )
                myPtr += 14;/* add in CD-XA fixed record offset (tnx, Phillips) */
        myNewAppleExtPtr = (NewAppleExtension *) myPtr;

        /*
         * Calculate the "real" end of the directory record information.
         *
         * Note: We always read the first 4 bytes of the System-Use data, so
         * adjust myPtr down so we don't read off the end of the directory!
         */
        myPtr = ((char *) theDirRecPtr) + (isonum_711(theDirRecPtr->length));
        myPtr -= sizeof(NewAppleExtension) - 1;
        while( (char *) myNewAppleExtPtr < myPtr )      /* end of directory buffer */
        {
                /*
                 *      If we get here, we can assume that ALL further entries in this
                 *      directory record are of the form:
                 *
                 *              struct OptionalSystemUse
                 *              {
                 *                      byte    Signature[2];
                 *                      byte    OSULength;
                 *                      byte    systemUseID;
                 *                      byte    fileType[4];            # only if HFS
                 *                      byte    fileCreator[4];         # only if HFS
                 *                      byte    finderFlags[2];         # only if HFS
                 *              };
                 *
                 *      This means that we can examine the Signature bytes to see
                 *      if they are 'AA' (the NEW Apple extension signature).
                 *      If they are, deal with them.  If they aren't,
                 *      the OSULength field will tell us how long this extension
                 *      info is (including the signature and length bytes) and that
                 *      will allow us to walk the OptionalSystemUse records until
                 *      we hit the end of them or run off the end of the 
                 *      directory record.
                 */
                u_char                          *myFromPtr, *myToPtr;
                union
                {
                        u_int32_t               fourchars;
                        u_char                  chars[4];
                } myChars;

                if ( (myNewAppleExtPtr->signature[0] == 'A') &&
                        (myNewAppleExtPtr->signature[1] == 'A') ) {
                        if ( isonum_711(myNewAppleExtPtr->systemUseID) == 2 ) {
                                /* HFS */
                                foundStuff = 1;                 /* we got one! */

                                myFromPtr = &myNewAppleExtPtr->fileType[0]; 
                                myToPtr = &myChars.chars[0];
                                *myToPtr++ = *myFromPtr++; 
                                *myToPtr++ = *myFromPtr++; 
                                *myToPtr++ = *myFromPtr++; 
                                *myToPtr = *myFromPtr;
                                myType = myChars.fourchars;     /* copy file type to user var */

                                myFromPtr = &myNewAppleExtPtr->fileCreator[0]; 
                                myToPtr = &myChars.chars[0];
                                *myToPtr++ = *myFromPtr++; 
                                *myToPtr++ = *myFromPtr++; 
                                *myToPtr++ = *myFromPtr++; 
                                *myToPtr = *myFromPtr;
                                myCreator = myChars.fourchars;  /* copy creator to user var */

                                myFromPtr = &myNewAppleExtPtr->finderFlags[0]; 
                                myToPtr = &myChars.chars[2];    /* *flags* is a short */
                                myChars.fourchars = 0; 
                                *myToPtr++ = *myFromPtr++; 
                                *myToPtr = *myFromPtr;
                                myFinderFlags = myChars.fourchars;
                                myFinderFlags &=
                                        ( fAlwaysBit | fSystemBit | fHasBundleBit | fLockedBit );
                                /* return Finder flags to user var */
                                *theFlagsPtr = (myFinderFlags | fInitedBit);

                                break;          /* exit the loop */
                        }
                }

                /*
                 *      Check to see if we have a reasonable OSULength value.
                 *      ZERO is not an acceptable value.  Nor is any value less than 4.
                 */

                if ( (isonum_711(myNewAppleExtPtr->OSULength)) < 4 ) 
                        break;  /* not acceptable - get out! */

                /* otherwise, step past this SystemUse record */
                (char *)myNewAppleExtPtr += (isonum_711(myNewAppleExtPtr->OSULength));
                
        } /* end of while loop */

DoneLooking:
        if ( foundStuff != 0 ) {
                *theTypePtr    = myType;
                *theCreatorPtr = myCreator;
        } else {
                *theTypePtr = 0;
                *theCreatorPtr = 0;
        }
        
        return;
        
} /* DRGetTypeCreatorAndFlags */


/*
 * Vnode pointer to File handle
 */
/* ARGSUSED */
int
cd9660_vptofh(struct vnode *vp, int *fhlenp, unsigned char *fhp, __unused vfs_context_t context)
{
        register struct iso_node *ip = VTOI(vp);
        register struct ifid *ifhp;

        if (*fhlenp < (int)sizeof(struct ifid))
                return (EOVERFLOW);
        
        ifhp = (struct ifid *)fhp;
        
        ifhp->ifid_ino = ip->i_number;
        ifhp->ifid_start = ip->iso_start;
        *fhlenp = sizeof(struct ifid);
        
#ifdef  ISOFS_DBG
        printf("vptofh: ino %d, start %ld\n",
               ifhp->ifid_ino,ifhp->ifid_start);
#endif
        return (0);
}

/*
 * Fast-FileSystem only?
 */
int
cd9660_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp,
              __unused size_t *oldlenp, __unused user_addr_t newp,
              __unused size_t newlen, __unused vfs_context_t context)
{
     return (ENOTSUP);
}