xnu-517.12.7.tar.gz

[apple/xnu.git] / bsd / isofs / cd9660 / cd9660_vnops.c

/*
 * Copyright (c) 2000-2003 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_vnops.c,v 1.22 1994/12/27 19:05:12 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_vnops.c      8.15 (Berkeley) 12/5/94
 *
 * HISTORY
 * 02-Feb-00    chw             Add cd9660_copyfile to return error
 * 29-Sep-98    djb             Add cd9660_getattrlist VOP for VDI support.
 * 15-sep-98    added cd9660_rmdir to do proper unlocking - chw
 * 12-aug-98    added cd9660_remove which will do proper unlocking - chw
 * 17-Feb-98    radar 1669467 - changed lock protocols to use the lock manager - chw
 * 22-Jan-98    radar 1669467 - ISO 9660 CD support - jwc
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/resourcevar.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>
#include <sys/malloc.h>
#include <sys/dir.h>
#include <sys/attr.h>
#include <vfs/vfs_support.h>
#include <sys/ubc.h>
#include <sys/lock.h>
#include <architecture/byte_order.h>

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

/*
 * Open called.
 *
 * Nothing to do.
 */
/* ARGSUSED */
int
cd9660_open(ap)
        struct vop_open_args /* {
                struct vnode *a_vp;
                int  a_mode;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;
{
        return (0);
}

/*
 * Close called
 *
 * Update the times on the inode on writeable file systems.
 */
/* ARGSUSED */
int
cd9660_close(ap)
        struct vop_close_args /* {
                struct vnode *a_vp;
                int  a_fflag;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;
{
        return (0);
}

/*
 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
 * The mode is shifted to select the owner/group/other fields. The
 * super user is granted all permissions.
 */
/* ARGSUSED */
int
cd9660_access(ap)
        struct vop_access_args /* {
                struct vnode *a_vp;
                int  a_mode;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;
        struct iso_node *ip = VTOI(vp);
        struct ucred *cred = ap->a_cred;
        mode_t mask, mode = ap->a_mode;
        register gid_t *gp;
        int i, error;

        /*
         * Disallow write attempts on read-only file systems;
         * unless the file is a socket, fifo, or a block or
         * character device resident on the file system.
         */
        if (mode & VWRITE) {
                switch (vp->v_type) {
                case VDIR:
                case VLNK:
                case VREG:
                        return (EROFS);
                        /* NOT REACHED */
                default:
                        break;
                }
        }

        /* If immutable bit set, nobody gets to write it. */
#if 0
        if ((mode & VWRITE) && (ip->i_flag & IMMUTABLE))
                return (EPERM);
#endif
        /* Otherwise, user id 0 always gets access. */
        if (cred->cr_uid == 0)
                return (0);

        mask = 0;

        /* Otherwise, check the owner. */
        if (cred->cr_uid == ip->inode.iso_uid) {
                if (mode & VEXEC)
                        mask |= S_IXUSR;
                if (mode & VREAD)
                        mask |= S_IRUSR;
                if (mode & VWRITE)
                        mask |= S_IWUSR;
                return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
        }

        /* Otherwise, check the groups. */
        for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
                if (ip->inode.iso_gid == *gp) {
                        if (mode & VEXEC)
                                mask |= S_IXGRP;
                        if (mode & VREAD)
                                mask |= S_IRGRP;
                        if (mode & VWRITE)
                                mask |= S_IWGRP;
                        return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
                }

        /* Otherwise, check everyone else. */
        if (mode & VEXEC)
                mask |= S_IXOTH;
        if (mode & VREAD)
                mask |= S_IROTH;
        if (mode & VWRITE)
                mask |= S_IWOTH;
        return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
}

int
cd9660_getattr(ap)
        struct vop_getattr_args /* {
                struct vnode *a_vp;
                struct vattr *a_vap;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;

{
        struct vnode *vp = ap->a_vp;
        register struct vattr *vap = ap->a_vap;
        register struct iso_node *ip = VTOI(vp);

        vap->va_fsid    = ip->i_dev;
        vap->va_fileid  = ip->i_number;

        vap->va_mode    = ip->inode.iso_mode;
        vap->va_nlink   = ip->inode.iso_links;
        vap->va_uid     = ip->inode.iso_uid;
        vap->va_gid     = ip->inode.iso_gid;
        vap->va_atime   = ip->inode.iso_atime;
        vap->va_mtime   = ip->inode.iso_mtime;
        vap->va_ctime   = ip->inode.iso_ctime;
        vap->va_rdev    = ip->inode.iso_rdev;

        vap->va_size    = (u_quad_t) ip->i_size;
        if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
                struct vop_readlink_args rdlnk;
                struct iovec aiov;
                struct uio auio;
                char *cp;

                MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
                aiov.iov_base = cp;
                aiov.iov_len = MAXPATHLEN;
                auio.uio_iov = &aiov;
                auio.uio_iovcnt = 1;
                auio.uio_offset = 0;
                auio.uio_rw = UIO_READ;
                auio.uio_segflg = UIO_SYSSPACE;
                auio.uio_procp = ap->a_p;
                auio.uio_resid = MAXPATHLEN;
                rdlnk.a_uio = &auio;
                rdlnk.a_vp = ap->a_vp;
                rdlnk.a_cred = ap->a_cred;
                if (cd9660_readlink(&rdlnk) == 0)
                        vap->va_size = MAXPATHLEN - auio.uio_resid;
                FREE(cp, M_TEMP);
        }
        vap->va_flags = 0;
        vap->va_gen = 1;
        vap->va_blocksize = ip->i_mnt->logical_block_size;
        vap->va_bytes = (u_quad_t) (ip->i_size + ip->i_rsrcsize);
        vap->va_type = vp->v_type;

        return (0);
}


/*
 * Vnode op for reading.
 */
int
cd9660_read(ap)
        struct vop_read_args /* {
                struct vnode *a_vp;
                struct uio *a_uio;
                int a_ioflag;
                struct ucred *a_cred;
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;
        register struct uio *uio = ap->a_uio;
        register struct iso_node *ip = VTOI(vp);
        register struct iso_mnt *imp;
        struct buf *bp;
        daddr_t lbn, rablock;
        off_t diff;
        int rasize, error = 0;
        long size, n, on;
        int devBlockSize = 0;

        if (uio->uio_resid == 0)
                return (0);
        if (uio->uio_offset < 0)
                return (EINVAL);

        imp = ip->i_mnt;
        VOP_DEVBLOCKSIZE(ip->i_devvp, &devBlockSize);

        if (UBCISVALID(vp)) {
                /*
                 * Copy any part of the Apple Double header.
                 */
                if ((ip->i_flag & ISO_ASSOCIATED) && (uio->uio_offset < ADH_SIZE)) {
                        apple_double_header_t  header;
                        int bytes;

                        if (uio->uio_offset < sizeof(apple_double_header_t)) {
                                header.magic = APPLEDOUBLE_MAGIC;
                                header.version = APPLEDOUBLE_VERSION;
                                header.count = 2;
                                header.entries[0].entryID = APPLEDOUBLE_FINDERINFO;
                                header.entries[0].offset = offsetof(apple_double_header_t, finfo);
                                header.entries[0].length = 32;
                                header.entries[1].entryID = APPLEDOUBLE_RESFORK;
                                header.entries[1].offset = ADH_SIZE;
                                header.entries[1].length = ip->i_size - ADH_SIZE;
                                header.finfo.fdType = ip->i_FileType;
                                header.finfo.fdCreator = ip->i_Creator;
                                header.finfo.fdFlags = ip->i_FinderFlags;
                                header.finfo.fdLocation.v = -1;
                                header.finfo.fdLocation.h = -1;
                                header.finfo.fdReserved = 0;

                                bytes = min(uio->uio_resid, sizeof(apple_double_header_t) - uio->uio_offset);
                                error = uiomove(((char *) &header) + uio->uio_offset, bytes, uio);
                                if (error)
                                        return error;
                        }
                        if (uio->uio_resid && uio->uio_offset < ADH_SIZE) {
                                caddr_t  buffer;

                                if (kmem_alloc(kernel_map, (vm_offset_t *)&buffer, ADH_SIZE)) {
                                        return (ENOMEM);
                                }       
                                bytes = min(uio->uio_resid, ADH_SIZE - uio->uio_offset);
                                error = uiomove(((char *) buffer) + uio->uio_offset, bytes, uio);
                                kmem_free(kernel_map, (vm_offset_t)buffer, ADH_SIZE);
                                if (error)
                                        return error;
                        }
                }
                if (uio->uio_resid > 0)
                        error = cluster_read(vp, uio, (off_t)ip->i_size, devBlockSize, 0);
        } else {

        do {
                lbn = lblkno(imp, uio->uio_offset);
                on = blkoff(imp, uio->uio_offset);
                n = min((u_int)(imp->logical_block_size - on),
                        uio->uio_resid);
                diff = (off_t)ip->i_size - uio->uio_offset;
                if (diff <= 0)
                        return (0);
                if (diff < n)
                        n = diff;
                size = blksize(imp, ip, lbn);
                rablock = lbn + 1;

                if (vp->v_lastr + 1 == lbn &&
                    lblktosize(imp, rablock) < ip->i_size) {
                        rasize = blksize(imp, ip, rablock);
                        error = breadn(vp, lbn, size, &rablock,
                                       &rasize, 1, NOCRED, &bp);
                } else
                        error = bread(vp, lbn, size, NOCRED, &bp);

                vp->v_lastr = lbn;
                n = min(n, size - bp->b_resid);
                if (error) {
                        brelse(bp);
                        return (error);
                }

                error = uiomove(bp->b_data + on, (int)n, uio);
                if (n + on == imp->logical_block_size ||
                    uio->uio_offset == (off_t)ip->i_size)
                        bp->b_flags |= B_AGE;
                brelse(bp);
        } while (error == 0 && uio->uio_resid > 0 && n != 0);
        }

        return (error);
}

/* ARGSUSED */
int
cd9660_ioctl(ap)
        struct vop_ioctl_args /* {
                struct vnode *a_vp;
                u_long a_command;
                caddr_t  a_data;
                int  a_fflag;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;
{
        return (ENOTTY);
}

/* ARGSUSED */
int
cd9660_select(ap)
        struct vop_select_args /* {
                struct vnode *a_vp;
                int  a_which;
                int  a_fflags;
                struct ucred *a_cred;
                void *a_wql;
                struct proc *a_p;
        } */ *ap;
{
        /*
         * We should really check to see if I/O is possible.
         */
        return (1);
}

/*
 * Mmap a file
 *
 * NB Currently unsupported.
 */
/* ARGSUSED */
int
cd9660_mmap(ap)
        struct vop_mmap_args /* {
                struct vnode *a_vp;
                int  a_fflags;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;
{

        return (EINVAL);
}

/*
 * Seek on a file
 *
 * Nothing to do, so just return.
 */
/* ARGSUSED */
int
cd9660_seek(ap)
        struct vop_seek_args /* {
                struct vnode *a_vp;
                off_t  a_oldoff;
                off_t  a_newoff;
                struct ucred *a_cred;
        } */ *ap;
{

        return (0);
}

/*
 * Structure for reading directories
 */
struct isoreaddir {
        struct dirent saveent;
        struct dirent current;
        off_t saveoff;
        off_t curroff;
        struct uio *uio;
        off_t uio_off;
        int eofflag;
//      u_long **cookies;
//      int *ncookies;
};

static int
iso_uiodir(idp,dp,off)
        struct isoreaddir *idp;
        struct dirent *dp;
        off_t off;
{
        int error;

        dp->d_name[dp->d_namlen] = 0;
        dp->d_reclen = DIRSIZ(dp);

        if (idp->uio->uio_resid < dp->d_reclen) {
                idp->eofflag = 0;
                return (-1);
        }

#if 0
        if (idp->cookies) {
                if (*idp->ncookies <= 0) {
                        idp->eofflag = 0;
                        return (-1);
                }

                **idp->cookies++ = off;
                --*idp->ncookies;
        }
#endif

        if ( (error = uiomove( (caddr_t)dp, dp->d_reclen, idp->uio )) )
                return (error);
        idp->uio_off = off;
        return (0);
}

static int
iso_shipdir(idp)
        struct isoreaddir *idp;
{
        struct dirent *dp;
        int cl, sl;
        int error;
        char *cname, *sname;

        cl = idp->current.d_namlen;
        cname = idp->current.d_name;

        dp = &idp->saveent;
        sname = dp->d_name;
        sl = dp->d_namlen;
        if (sl > 0) {
                if (sl != cl
                    || bcmp(sname,cname,sl)) {
                        if (idp->saveent.d_namlen) {
                                if ( (error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) )
                                        return (error);
                                idp->saveent.d_namlen = 0;
                        }
                }
        }
        idp->current.d_reclen = DIRSIZ(&idp->current);
        idp->saveoff = idp->curroff;
        bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
        return (0);
}

/*
 * Vnode op for readdir
 *
 * Note that directories are sector aligned (2K) and
 * that an entry can cross a logical block but not
 * a sector.
 */
int
cd9660_readdir(ap)
        struct vop_readdir_args /* {
                struct vnodeop_desc *a_desc;
                struct vnode *a_vp;
                struct uio *a_uio;
                struct ucred *a_cred;
                int *a_eofflag;
                int *a_ncookies;
                u_long **a_cookies;
        } */ *ap;
{
        register struct uio *uio = ap->a_uio;
        off_t startingOffset = uio->uio_offset;
        size_t lost = 0;
        struct isoreaddir *idp;
        struct vnode *vdp = ap->a_vp;
        struct iso_node *dp;
        struct iso_mnt *imp;
        struct buf *bp = NULL;
        struct iso_directory_record *ep;
        int entryoffsetinblock;
        doff_t endsearch;
        u_long bmask;
        int error = 0;
        int reclen;
        u_short namelen;

        dp = VTOI(vdp);
        imp = dp->i_mnt;
        bmask = imp->im_sector_size - 1;

        MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
        idp->saveent.d_namlen = 0;
        /*
         * XXX
         * Is it worth trying to figure out the type?
         */
        idp->saveent.d_type = idp->current.d_type = DT_UNKNOWN;
        idp->uio = uio;
        idp->eofflag = 1;
        idp->curroff = uio->uio_offset;

        if ((entryoffsetinblock = idp->curroff & bmask) &&
            (error = VOP_BLKATOFF(vdp, SECTOFF(imp, idp->curroff), NULL, &bp))) {
                FREE(idp, M_TEMP);
                return (error);
        }
        endsearch = dp->i_size;

        while (idp->curroff < endsearch) {
                /*
                 * If offset is on a block boundary,
                 * read the next directory block.
                 * Release previous if it exists.
                 */
                if ((idp->curroff & bmask) == 0) {
                        if (bp != NULL)
                                brelse(bp);
                        if ((error = VOP_BLKATOFF(vdp, SECTOFF(imp, idp->curroff), NULL, &bp)))
                                break;
                        entryoffsetinblock = 0;
                }
                /*
                 * Get pointer to next entry.
                 */
                ep = (struct iso_directory_record *)
                        ((char *)bp->b_data + entryoffsetinblock);

                reclen = isonum_711(ep->length);
                if (reclen == 0) {
                        /* skip to next block, if any */
                        idp->curroff =
                            (idp->curroff & ~bmask) + imp->im_sector_size;
                        continue;
                }

                if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
                        error = EINVAL;
                        /* illegal entry, stop */
                        break;
                }

                if (entryoffsetinblock + reclen > imp->im_sector_size) {
                        error = EINVAL;
                        /* illegal directory, so stop looking */
                        break;
                }

                idp->current.d_namlen = isonum_711(ep->name_len);

                if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
                        error = EINVAL;
                        /* illegal entry, stop */
                        break;
                }

                /*
                 * Some poorly mastered discs have an incorrect directory
                 * file size.  If the '.' entry has a better size (bigger)
                 * then use that instead.
                 */
                if ((uio->uio_offset == 0) && (isonum_733(ep->size) > endsearch)) {
                        dp->i_size = endsearch = isonum_733(ep->size);
                }

                if ( isonum_711(ep->flags) & directoryBit )
                        idp->current.d_fileno = isodirino(ep, imp);
                else {
                        idp->current.d_fileno = (bp->b_blkno << imp->im_bshift) +
                                                entryoffsetinblock;
                }

                idp->curroff += reclen;

                switch (imp->iso_ftype) {
                case ISO_FTYPE_RRIP:
                        cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
                                           &idp->current.d_fileno,imp);
                        idp->current.d_namlen = (u_char)namelen;
                        if (idp->current.d_namlen)
                                error = iso_uiodir(idp,&idp->current,idp->curroff);
                        break;

                case ISO_FTYPE_JOLIET:
                        ucsfntrans((u_int16_t *)ep->name, idp->current.d_namlen,
                                   idp->current.d_name, &namelen,
                                   isonum_711(ep->flags) & directoryBit,
                                   isonum_711(ep->flags) & associatedBit);
                        idp->current.d_namlen = (u_char)namelen;
                        if (idp->current.d_namlen)
                                error = iso_uiodir(idp,&idp->current,idp->curroff);
                        break;

                default:        /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */
                        strcpy(idp->current.d_name,"..");
                        switch (ep->name[0]) {
                        case 0:
                                idp->current.d_namlen = 1;
                                error = iso_uiodir(idp,&idp->current,idp->curroff);
                                break;
                        case 1:
                                idp->current.d_namlen = 2;
                                error = iso_uiodir(idp,&idp->current,idp->curroff);
                                break;
                        default:
                                isofntrans(ep->name,idp->current.d_namlen,
                                           idp->current.d_name, &namelen,
                                           imp->iso_ftype == ISO_FTYPE_9660,
                                           isonum_711(ep->flags) & associatedBit);
                                idp->current.d_namlen = (u_char)namelen;
                                if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
                                        error = iso_shipdir(idp);
                                else
                                        error = iso_uiodir(idp,&idp->current,idp->curroff);
                                break;
                        }
                }
                if (error)
                        break;

                entryoffsetinblock += reclen;
        }

        if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
                idp->current.d_namlen = 0;
                error = iso_shipdir(idp);
        }

        if (!error && ap->a_ncookies) {
                struct dirent *dp, *dpstart;
                off_t bufferOffset;
                u_long *cookies;
                int ncookies;

                /*
                 * Only the NFS server uses cookies, and it loads the
                 * directory block into system space, so we can just look at
                 * it directly.
                 *
                 * We assume the entire transfer is done to a single contiguous buffer.
                 */
                if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
                        panic("ufs_readdir: lost in space");
                
                /*
                 * Make a first pass over the buffer just generated,
                 * counting the number of entries:
                 */
                dpstart = (struct dirent *) (uio->uio_iov->iov_base - (uio->uio_offset - startingOffset));
                for (dp = dpstart, bufferOffset = startingOffset, ncookies = 0;
                     bufferOffset < uio->uio_offset; ) {
                        if (dp->d_reclen == 0)
                                break;
                        bufferOffset += dp->d_reclen;
                        ncookies++;
                        dp = (struct dirent *)((caddr_t)dp + dp->d_reclen);
                }
                lost += uio->uio_offset - bufferOffset;
                uio->uio_offset = bufferOffset;
                
                /*
                 * Allocate a buffer to hold the cookies requested:
                 */
                MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, M_WAITOK);
                *ap->a_ncookies = ncookies;
                *ap->a_cookies = cookies;

                /*
                 * Fill in the offsets for each entry in the buffer just allocated:
                 */
                for (bufferOffset = startingOffset, dp = dpstart; bufferOffset < uio->uio_offset; ) {
                        *(cookies++) = bufferOffset;
                        bufferOffset += dp->d_reclen;
                        dp = (struct dirent *)((caddr_t)dp + dp->d_reclen);
                }
        }

        if (error < 0)
                error = 0;

        if (bp)
                brelse (bp);

        uio->uio_offset = idp->uio_off;
        *ap->a_eofflag = idp->eofflag;

        FREE(idp, M_TEMP);

        return (error);
}

/*
 * Return target name of a symbolic link
 * Shouldn't we get the parent vnode and read the data from there?
 * This could eventually result in deadlocks in cd9660_lookup.
 * But otherwise the block read here is in the block buffer two times.
 */
typedef struct iso_directory_record ISODIR;
typedef struct iso_node             ISONODE;
typedef struct iso_mnt              ISOMNT;
int
cd9660_readlink(ap)
        struct vop_readlink_args /* {
                struct vnode *a_vp;
                struct uio *a_uio;
                struct ucred *a_cred;
        } */ *ap;
{
        ISONODE *ip;
        ISODIR  *dirp;
        ISOMNT  *imp;
        struct  buf *bp;
        struct  uio *uio;
        u_short symlen;
        int     error;
        char    *symname;

        ip  = VTOI(ap->a_vp);
        imp = ip->i_mnt;
        uio = ap->a_uio;

        if (imp->iso_ftype != ISO_FTYPE_RRIP)
                return (EINVAL);

        /*
         * Get parents directory record block that this inode included.
         */
        error = bread(imp->im_devvp,
                          (ip->i_number >> imp->im_bshift),
                      imp->logical_block_size, NOCRED, &bp);
        if (error) {
                brelse(bp);
                return (EINVAL);
        }

        /*
         * Setup the directory pointer for this inode
         */
        dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));

        /*
         * Just make sure, we have a right one....
         *   1: Check not cross boundary on block
         */
        if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
            > imp->logical_block_size) {
                brelse(bp);
                return (EINVAL);
        }

        /*
         * Now get a buffer
         * Abuse a namei buffer for now.
         */
        if (uio->uio_segflg == UIO_SYSSPACE)
                symname = uio->uio_iov->iov_base;
        else
                MALLOC_ZONE(symname, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
        
        /*
         * Ok, we just gathering a symbolic name in SL record.
         */
        if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
                if (uio->uio_segflg != UIO_SYSSPACE)
                        FREE_ZONE(symname, MAXPATHLEN, M_NAMEI);
                brelse(bp);
                return (EINVAL);
        }
        /*
         * Don't forget before you leave from home ;-)
         */
        brelse(bp);

        /*
         * return with the symbolic name to caller's.
         */
        if (uio->uio_segflg != UIO_SYSSPACE) {
                error = uiomove(symname, symlen, uio);
                FREE_ZONE(symname, MAXPATHLEN, M_NAMEI);
                return (error);
        }
        uio->uio_resid -= symlen;
        uio->uio_iov->iov_base += symlen;
        uio->uio_iov->iov_len -= symlen;
        return (0);
}

/*
 * Lock an inode.
 */
 
int
cd9660_lock(ap)
        struct vop_lock_args /* {
                struct vnode *a_vp;
                int a_flags;
                struct proc *a_p;
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;

        if (VTOI(vp) == (struct iso_node *) NULL)
                panic ("cd9660_lock: null inode");
        return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags, &vp->v_interlock,ap->a_p));
}

/*
 * Unlock an inode.
 */

int
cd9660_unlock(ap)
        struct vop_unlock_args /* {
                struct vnode *a_vp;
                int a_flags;
                struct proc *a_p;
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;

        return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock,ap->a_p));

}

/*
 * Calculate the logical to physical mapping if not done already,
 * then call the device strategy routine.
 */
int
cd9660_strategy(ap)
        struct vop_strategy_args /* {
                struct buf *a_bp;
        } */ *ap;
{
        register struct buf *bp = ap->a_bp;
        register struct vnode *vp = bp->b_vp;
        register struct iso_node *ip;
        int error;

        ip = VTOI(vp);
        if (vp->v_type == VBLK || vp->v_type == VCHR)
                panic("cd9660_strategy: spec");
        if (bp->b_blkno == bp->b_lblkno) {
                if ( (error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL)) ) {
                        bp->b_error = error;
                        bp->b_flags |= B_ERROR;
                        biodone(bp);
                        return (error);
                }
                if ((long)bp->b_blkno == -1)
                        clrbuf(bp);
        }
        if ((long)bp->b_blkno == -1) {
                biodone(bp);
                return (0);
        }
        vp = ip->i_devvp;
        bp->b_dev = vp->v_rdev;
        VOCALL (vp->v_op, VOFFSET(vop_strategy), ap);
        return (0);
}

/*
 * Print out the contents of an inode.
 */
int
cd9660_print(ap)
        struct vop_print_args /* {
                struct vnode *a_vp;
        } */ *ap;
{

        printf("tag VT_ISOFS, isofs vnode\n");
        return (0);
}

/*
 * Check for a locked inode.
 */
int
cd9660_islocked(ap)
        struct vop_islocked_args /* {
                struct vnode *a_vp;
        } */ *ap;
{

        return (lockstatus(&VTOI(ap->a_vp)->i_lock));
}

/*
 * Return POSIX pathconf information applicable to cd9660 filesystems.
 */
int
cd9660_pathconf(ap)
        struct vop_pathconf_args /* {
                struct vnode *a_vp;
                int a_name;
                register_t *a_retval;
        } */ *ap;
{

        switch (ap->a_name) {
        case _PC_LINK_MAX:
                *ap->a_retval = 1;
                return (0);
        case _PC_NAME_MAX:
                switch (VTOI(ap->a_vp)->i_mnt->iso_ftype) {
                case ISO_FTYPE_RRIP:
                        *ap->a_retval = ISO_RRIP_NAMEMAX;
                        break;
                case ISO_FTYPE_JOLIET:
                        *ap->a_retval = ISO_JOLIET_NAMEMAX;
                        break;
                default:
                        *ap->a_retval = ISO_NAMEMAX;
                }
                return (0);
        case _PC_PATH_MAX:
                *ap->a_retval = PATH_MAX;
                return (0);
        case _PC_PIPE_BUF:
                *ap->a_retval = PIPE_BUF;
                return (0);
        case _PC_CHOWN_RESTRICTED:
                *ap->a_retval = 1;
                return (0);
        case _PC_NO_TRUNC:
                *ap->a_retval = 1;
                return (0);
        default:
                return (EINVAL);
        }
        /* NOTREACHED */
}

/*
 * Unsupported operation
 */
int
cd9660_enotsupp()
{

        return (EOPNOTSUPP);
}
/* Pagein. similar to read */
int
cd9660_pagein(ap)
        struct vop_pagein_args /* {
                struct vnode    *a_vp,
                upl_t           a_pl,
                vm_offset_t     a_pl_offset,
                off_t           a_f_offset,
                size_t          a_size,
                struct ucred    *a_cred,
                int             a_flags
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;
        upl_t pl = ap->a_pl;
        size_t size = ap->a_size;
        off_t f_offset = ap->a_f_offset;
        vm_offset_t pl_offset = ap->a_pl_offset;
        int flags  = ap->a_flags;
        register struct iso_node *ip = VTOI(vp);
        int error = 0;

        /*
         * Copy the Apple Double header.
         */
        if ((ip->i_flag & ISO_ASSOCIATED) && (f_offset == 0) && (size == ADH_SIZE)) {
                apple_double_header_t  header;
                kern_return_t  kret;
                vm_offset_t  ioaddr;

                kret = ubc_upl_map(pl, &ioaddr);
                if (kret != KERN_SUCCESS)
                        panic("cd9660_xa_pagein: ubc_upl_map error = %d", kret);
                ioaddr += pl_offset;
                bzero((caddr_t)ioaddr, ADH_SIZE);

                header.magic = APPLEDOUBLE_MAGIC;
                header.version = APPLEDOUBLE_VERSION;
                header.count = 2;
                header.entries[0].entryID = APPLEDOUBLE_FINDERINFO;
                header.entries[0].offset = offsetof(apple_double_header_t, finfo);
                header.entries[0].length = 32;
                header.entries[1].entryID = APPLEDOUBLE_RESFORK;
                header.entries[1].offset = ADH_SIZE;
                header.entries[1].length = ip->i_size - ADH_SIZE;
                header.finfo.fdType = ip->i_FileType;
                header.finfo.fdCreator = ip->i_Creator;
                header.finfo.fdFlags = ip->i_FinderFlags;
                header.finfo.fdLocation.v = -1;
                header.finfo.fdLocation.h = -1;
                header.finfo.fdReserved = 0;

                bcopy((caddr_t)&header, (caddr_t)ioaddr, sizeof(apple_double_header_t));

                kret = ubc_upl_unmap(pl);
                if (kret != KERN_SUCCESS)
                        panic("cd9660_xa_pagein: ubc_upl_unmap error = %d", kret);

                if ((flags & UPL_NOCOMMIT) == 0) {
                        ubc_upl_commit_range(pl, pl_offset, size, UPL_COMMIT_FREE_ON_EMPTY);
                }
        } else {
                int devBlockSize = 0;

                /* check pageouts are for reg file only  and ubc info is present*/
                if  (UBCINVALID(vp))
                        panic("cd9660_pagein: Not a  VREG");
                UBCINFOCHECK("cd9660_pagein", vp);
        
                VOP_DEVBLOCKSIZE(ip->i_devvp, &devBlockSize);

                error = cluster_pagein(vp, pl, pl_offset, f_offset, size,
                            (off_t)ip->i_size, devBlockSize, flags);
        }
        return (error);
}

/*  
 * cd9660_remove - not possible to remove a file from iso cds
 *  
 * Locking policy: a_dvp and vp locked on entry, unlocked on exit
 */ 
int 
cd9660_remove(ap)
    struct vop_remove_args      /* { struct vnode *a_dvp; struct vnode *a_vp;
        struct componentname *a_cnp; } */ *ap;  
{   
    if (ap->a_dvp == ap->a_vp)
                vrele(ap->a_vp);
        else
                vput(ap->a_vp);
        vput(ap->a_dvp);

    return (EROFS);
}   


/*  
 * cd9660_rmdir - not possible to remove a directory from iso cds
 *  
 * Locking policy: a_dvp and vp locked on entry, unlocked on exit
 */ 
int 
cd9660_rmdir(ap)
    struct vop_rmdir_args      /* { struct vnode *a_dvp; struct vnode *a_vp;
        struct componentname *a_cnp; } */ *ap;  
{   
    (void) nop_rmdir(ap);
    return (EROFS);
}   

/*

#
#% getattrlist  vp      = = =
#
 vop_getattrlist {
     IN struct vnode *vp;
     IN struct attrlist *alist;
     INOUT struct uio *uio;
     IN struct ucred *cred;
     IN struct proc *p;
 };

 */
int
cd9660_getattrlist(ap)
        struct vop_getattrlist_args /* {
        struct vnode *a_vp;
        struct attrlist *a_alist
        struct uio *a_uio;
        struct ucred *a_cred;
        struct proc *a_p;
        } */ *ap;
{
    struct attrlist *alist = ap->a_alist;
    int fixedblocksize;
    int attrblocksize;
    int attrbufsize;
    void *attrbufptr;
    void *attrptr;
    void *varptr;
    int error = 0;

        if ((alist->bitmapcount != ATTR_BIT_MAP_COUNT) ||
        ((alist->commonattr & ~ATTR_CMN_VALIDMASK) != 0) ||
        ((alist->volattr & ~ATTR_VOL_VALIDMASK) != 0) ||
        ((alist->dirattr & ~ATTR_DIR_VALIDMASK) != 0) ||
        ((alist->fileattr & ~ATTR_FILE_VALIDMASK) != 0) ||
        ((alist->forkattr & ~ATTR_FORK_VALIDMASK) != 0)) {
                return EINVAL;
        };

        /* 
         * Requesting volume information requires setting the ATTR_VOL_INFO bit and
         * volume info requests are mutually exclusive with all other info requests:
         */
        if ((alist->volattr != 0) &&
                (((alist->volattr & ATTR_VOL_INFO) == 0) ||
                (alist->dirattr != 0) || 
                (alist->fileattr != 0) || 
                (alist->forkattr != 0) )) {
        return EINVAL;
        };

        /*
         * Reject requests for unsupported options for now:
         */
        if (alist->volattr & ATTR_VOL_MOUNTPOINT) return EINVAL;
        if (alist->commonattr & (ATTR_CMN_NAMEDATTRCOUNT | ATTR_CMN_NAMEDATTRLIST)) return EINVAL;
        if (alist->fileattr &
                (ATTR_FILE_FILETYPE |
                 ATTR_FILE_FORKCOUNT |
                 ATTR_FILE_FORKLIST |
                 ATTR_FILE_DATAEXTENTS |
                 ATTR_FILE_RSRCEXTENTS)) {
                return EINVAL;
        };


    fixedblocksize = attrcalcsize(alist);
    attrblocksize = fixedblocksize + (sizeof(u_long));                                                  /* u_long for length longword */
    if (alist->commonattr & ATTR_CMN_NAME) attrblocksize += NAME_MAX;
    if (alist->commonattr & ATTR_CMN_NAMEDATTRLIST) attrblocksize += 0;                 /* XXX PPD */
    if (alist->volattr & ATTR_VOL_MOUNTPOINT) attrblocksize += PATH_MAX;
    if (alist->volattr & ATTR_VOL_NAME) attrblocksize += NAME_MAX;
    if (alist->fileattr & ATTR_FILE_FORKLIST) attrblocksize += 0;                               /* XXX PPD */

    attrbufsize = MIN(ap->a_uio->uio_resid, attrblocksize);
    MALLOC(attrbufptr, void *, attrblocksize, M_TEMP, M_WAITOK);
    attrptr = attrbufptr;
    *((u_long *)attrptr) = 0;                                                                   /* Set buffer length in case of errors */
    ++((u_long *)attrptr);                                                                              /* Reserve space for length field */
    varptr = ((char *)attrptr) + fixedblocksize;                                /* Point to variable-length storage */

        packattrblk(alist, ap->a_vp, &attrptr, &varptr);

    /* Store length of fixed + var block */
    *((u_long *)attrbufptr) = ((char*)varptr - (char*)attrbufptr);
    /* Don't copy out more data than was generated */
    attrbufsize = MIN(attrbufsize, (char*)varptr - (char*)attrbufptr);

    error = uiomove((caddr_t)attrbufptr, attrbufsize, ap->a_uio);

    FREE(attrbufptr, M_TEMP);

    return error;
}

/*
 * Make a RIFF file header for a CD-ROM XA media file.
 */
__private_extern__ void
cd9660_xa_init(struct vnode *vp, struct iso_directory_record *isodir)
{
        u_long sectors;
        struct iso_node *ip = VTOI(vp);
        struct riff_header *header;
        u_char name_len;
        char *cdxa;
        
        MALLOC(header, struct riff_header *, sizeof(struct riff_header), M_TEMP, M_WAITOK);

        sectors = ip->i_size / 2048;

        strncpy(header->riff, "RIFF", 4);
        header->fileSize = NXSwapHostLongToLittle(sectors * CDXA_SECTOR_SIZE + sizeof(struct riff_header) - 8);
        strncpy(header->cdxa, "CDXA", 4);
        strncpy(header->fmt, "fmt ", 4);
        header->fmtSize = NXSwapHostLongToLittle(16);
        strncpy(header->data, "data", 4);
        header->dataSize = NXSwapHostLongToLittle(sectors * CDXA_SECTOR_SIZE);

        /*
         * Copy the CD-ROM XA extended directory information into the header.  As far as
         * I can tell, it's always 14 bytes in the directory record, but allocated 16 bytes
         * in the header (the last two being zeroed pad bytes).
         */
        name_len = isonum_711(isodir->name_len);
        cdxa = &isodir->name[name_len];
        if ((name_len & 0x01) == 0)
                ++cdxa;         /* Skip pad byte */
        bcopy(cdxa, header->fmtData, 14);
        header->fmtData[14] = 0;
        header->fmtData[15] = 0;

        /*
         * Point this i-node to the "whole sector" device instead of the normal
         * device.  This allows cd9660_strategy to be ignorant of the block
         * (sector) size.
         */
        vrele(ip->i_devvp);
        ip->i_devvp = ip->i_mnt->phys_devvp;
        VREF(ip->i_devvp);

        ip->i_size = sectors * CDXA_SECTOR_SIZE + sizeof(struct riff_header);
        ip->i_riff = header;
        vp->v_op = cd9660_cdxaop_p;
}

/*
 * Helper routine for VOP_READ and VOP_PAGEIN of CD-ROM XA multimedia files.
 * This routine determines the physical location of the file, then reads
 * sectors directly from the device into a buffer.  It also handles inserting
 * the RIFF header at the beginning of the file.
 *
 * Exactly one of buffer or uio must be non-zero.  It will either bcopy to
 * buffer, or uiomove via uio.
 *
 * XXX Should this code be using breadn and vp->v_lastr to support single-block
 * read-ahead?  Should we try more aggressive read-ahead like cluster_io does?
 *
 * XXX This could be made to do larger I/O to the device (reading all the
 * whole sectors directly into the buffer).  That would make the code more
 * complex, and the current code only adds 2.5% overhead compared to reading
 * from the device directly (at least on my test machine).
 */
static int
cd9660_xa_read_common(
        struct vnode *vp,
        off_t offset,
        size_t amount,
        caddr_t buffer,
        struct uio *uio)
{
        struct iso_node *ip = VTOI(vp);
        struct buf *bp;
        off_t diff;             /* number of bytes from offset to file's EOF */
        daddr_t block;  /* physical disk block containing offset */
        off_t sect_off; /* starting offset into current sector */
        u_int count;    /* number of bytes to transfer in current block */
        int error=0;

        /*
         * Copy any part of the RIFF header.
         */
        if (offset < sizeof(struct riff_header)) {
                char *p;
                
                p = ((char *) ip->i_riff) + offset;
                count = min(amount, sizeof(struct riff_header) - offset);
                if (buffer) {
                        bcopy(p, buffer, count);
                        buffer += count;
                } else {
                        error = uiomove(p, count, uio);
                }
                amount -= count;
                offset += count;
        }
        if (error)
                return error;

        /*
         * Loop over (possibly partial) blocks to transfer.
         */
        while (error == 0 && amount > 0) {
                /*
                 * Determine number of bytes until EOF.  If we've hit
                 * EOF then return.
                 */
                diff = ip->i_size - offset;
                if (diff <= 0)
                        return 0;

                /* Get a block from the underlying device */
                block = ip->iso_start + (offset - sizeof(struct riff_header))/CDXA_SECTOR_SIZE;
                error = bread(ip->i_devvp, block, CDXA_SECTOR_SIZE, NOCRED, &bp);
                if (error) {
                        brelse(bp);
                        return error;
                }
                if (bp->b_resid) {
                        printf("isofs: cd9660_xa_read_common: bread didn't read full sector\n");
                        return EIO;
                }
                
                /* Figure out which part of the block to copy, and copy it */
                sect_off = (offset - sizeof(struct riff_header)) % CDXA_SECTOR_SIZE;
                count = min(CDXA_SECTOR_SIZE-sect_off, amount);
                if (diff < count)       /* Pin transfer amount to EOF */
                        count = diff;
                
                if (buffer) {
                        bcopy(bp->b_data+sect_off, buffer, count);
                        buffer += count;
                } else {
                        error = uiomove(bp->b_data+sect_off, count, uio);
                }
                amount -= count;
                offset += count;
                
                /*
                 * If we copied through the end of the block, or the end of file, then
                 * age the device block.  This is optimized for sequential access.
                 */
                if (sect_off+count == CDXA_SECTOR_SIZE || offset == (off_t)ip->i_size)
                        bp->b_flags |= B_AGE;
                brelse(bp);
        }

        return error;
}

/*
 * Read from a CD-ROM XA multimedia file.
 *
 * This uses the same common routine as pagein for doing the actual read
 * from the device.
 *
 * This routine doesn't do any caching beyond what the block device does.
 * Even then, cd9660_xa_read_common ages the blocks once we read up to
 * the end.
 *
 * We don't even take advantage if the file has been memory mapped and has
 * valid pages already (in which case we could just uiomove from the page
 * to the caller).  Since we're a read-only filesystem, there can't be
 * any cache coherency problems.  Multimedia files are expected to be
 * large and streamed anyway, so caching file contents probably isn't
 * important.
 */
int
cd9660_xa_read(ap)
        struct vop_read_args /* {
                struct vnode *a_vp;
                struct uio *a_uio;
                int a_ioflag;
                struct ucred *a_cred;
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;
        register struct uio *uio = ap->a_uio;
        register struct iso_node *ip = VTOI(vp);
        off_t offset = uio->uio_offset;
        size_t size = uio->uio_resid;

        /* Check for some obvious parameter problems */
        if (offset < 0)
                return EINVAL;
        if (size == 0)
                return 0;
        if (offset >= ip->i_size)
                return 0;

        /* Pin the size of the read to the file's EOF */
        if (offset + size > ip->i_size)
                size = ip->i_size - offset;

        return cd9660_xa_read_common(vp, offset, size, NULL, uio);
}

/*
 * Page in from a CD-ROM XA media file.
 *
 * Since our device block size isn't a power of two, we can't use
 * cluster_pagein.  Instead, we have to map the page and read into it.
 */
static int
cd9660_xa_pagein(ap)
        struct vop_pagein_args /* {
                struct vnode    *a_vp,
                upl_t           a_pl,
                vm_offset_t     a_pl_offset,
                off_t           a_f_offset,
                size_t          a_size,
                struct ucred    *a_cred,
                int             a_flags
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;
        upl_t pl = ap->a_pl;
        size_t size= ap->a_size;
        off_t f_offset = ap->a_f_offset;
        vm_offset_t pl_offset = ap->a_pl_offset;
        int flags  = ap->a_flags;
        register struct iso_node *ip = VTOI(vp);
        int error;
    kern_return_t kret;
    vm_offset_t ioaddr;

        /* check pageins are for reg file only  and ubc info is present*/
        if  (UBCINVALID(vp))
                panic("cd9660_xa_pagein: Not a  VREG");
        UBCINFOCHECK("cd9660_xa_pagein", vp);

        if (size <= 0)
                panic("cd9660_xa_pagein: size = %d", size);

        kret = ubc_upl_map(pl, &ioaddr);
        if (kret != KERN_SUCCESS)
                panic("cd9660_xa_pagein: ubc_upl_map error = %d", kret);

        ioaddr += pl_offset;

        /* Make sure pagein doesn't extend past EOF */
        if (f_offset + size > ip->i_size)
                size = ip->i_size - f_offset;   /* pin size to EOF */

        /* Read the data in using the underlying device */
        error = cd9660_xa_read_common(vp, f_offset, size, (caddr_t)ioaddr, NULL);
        
        /* Zero fill part of page past EOF */
        if (ap->a_size > size)
                bzero((caddr_t)ioaddr+size, ap->a_size-size);

        kret = ubc_upl_unmap(pl);
        if (kret != KERN_SUCCESS)
                panic("cd9660_xa_pagein: ubc_upl_unmap error = %d", kret);

        if ((flags & UPL_NOCOMMIT) == 0)
        {
                if (error)
                        ubc_upl_abort_range(pl, pl_offset, ap->a_size, UPL_ABORT_FREE_ON_EMPTY);
                else
                        ubc_upl_commit_range(pl, pl_offset, ap->a_size, UPL_COMMIT_FREE_ON_EMPTY);
        }
        
        return error;
}

/*
 * Global vfs data structures for isofs
 */
#define cd9660_create \
        ((int (*) __P((struct  vop_create_args *)))err_create)
#define cd9660_mknod ((int (*) __P((struct  vop_mknod_args *)))err_mknod)
#define cd9660_setattr \
        ((int (*) __P((struct  vop_setattr_args *)))cd9660_enotsupp)
#define cd9660_write ((int (*) __P((struct  vop_write_args *)))cd9660_enotsupp)
#if NFSSERVER
int     lease_check __P((struct vop_lease_args *));
#define cd9660_lease_check lease_check
#else
#define cd9660_lease_check ((int (*) __P((struct vop_lease_args *)))nullop)
#endif
#define cd9660_fsync ((int (*) __P((struct  vop_fsync_args *)))nullop)
#define cd9660_rename \
        ((int (*) __P((struct  vop_rename_args *)))err_rename)
#define cd9660_copyfile \
        ((int (*) __P((struct  vop_copyfile_args *)))err_copyfile)
#define cd9660_link ((int (*) __P((struct  vop_link_args *)))err_link)
#define cd9660_mkdir ((int (*) __P((struct  vop_mkdir_args *)))err_mkdir)
#define cd9660_symlink \
        ((int (*) __P((struct vop_symlink_args *)))err_symlink)
#define cd9660_advlock \
        ((int (*) __P((struct vop_advlock_args *)))cd9660_enotsupp)
#define cd9660_valloc ((int(*) __P(( \
                struct vnode *pvp, \
                int mode, \
                struct ucred *cred, \
                struct vnode **vpp))) cd9660_enotsupp)
#define cd9660_vfree ((int (*) __P((struct  vop_vfree_args *)))cd9660_enotsupp)
#define cd9660_truncate \
        ((int (*) __P((struct  vop_truncate_args *)))cd9660_enotsupp)
#define cd9660_update \
        ((int (*) __P((struct  vop_update_args *)))cd9660_enotsupp)
#define cd9660_bwrite \
        ((int (*) __P((struct  vop_bwrite_args *)))cd9660_enotsupp)
#define cd9660_pageout \
        ((int (*) __P((struct  vop_pageout_args *)))cd9660_enotsupp)
int cd9660_blktooff(struct vop_blktooff_args *ap);
int cd9660_offtoblk(struct vop_offtoblk_args *ap);
int cd9660_cmap(struct vop_cmap_args *ap);

#define VOPFUNC int (*)(void *)
/*
 * Global vfs data structures for cd9660
 */
int (**cd9660_vnodeop_p)(void *);
struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = {
        { &vop_default_desc, (VOPFUNC)vn_default_error },
        { &vop_lookup_desc, (VOPFUNC)cd9660_lookup },   /* lookup */
        { &vop_create_desc, (VOPFUNC)cd9660_create },   /* create */
        { &vop_mknod_desc, (VOPFUNC)cd9660_mknod },     /* mknod */
        { &vop_open_desc, (VOPFUNC)cd9660_open },       /* open */
        { &vop_close_desc, (VOPFUNC)cd9660_close },     /* close */
        { &vop_access_desc, (VOPFUNC)cd9660_access },   /* access */
        { &vop_getattr_desc, (VOPFUNC)cd9660_getattr }, /* getattr */
        { &vop_setattr_desc, (VOPFUNC)cd9660_setattr }, /* setattr */
        { &vop_read_desc, (VOPFUNC)cd9660_read },       /* read */
        { &vop_write_desc, (VOPFUNC)cd9660_write },     /* write */
        { &vop_lease_desc, (VOPFUNC)cd9660_lease_check },/* lease */
        { &vop_ioctl_desc, (VOPFUNC)cd9660_ioctl },     /* ioctl */
        { &vop_select_desc, (VOPFUNC)cd9660_select },   /* select */
        { &vop_mmap_desc, (VOPFUNC)cd9660_mmap },       /* mmap */
        { &vop_fsync_desc, (VOPFUNC)cd9660_fsync },     /* fsync */
        { &vop_seek_desc, (VOPFUNC)cd9660_seek },       /* seek */
        { &vop_remove_desc, (VOPFUNC)cd9660_remove },   /* remove */
        { &vop_link_desc, (VOPFUNC)cd9660_link },       /* link */
        { &vop_rename_desc, (VOPFUNC)cd9660_rename },   /* rename */
        { &vop_copyfile_desc, (VOPFUNC)cd9660_copyfile },/* copyfile */
        { &vop_mkdir_desc, (VOPFUNC)cd9660_mkdir },     /* mkdir */
        { &vop_rmdir_desc, (VOPFUNC)cd9660_rmdir },     /* rmdir */
        { &vop_symlink_desc, (VOPFUNC)cd9660_symlink }, /* symlink */
        { &vop_readdir_desc, (VOPFUNC)cd9660_readdir }, /* readdir */
        { &vop_readlink_desc, (VOPFUNC)cd9660_readlink },/* readlink */
        { &vop_abortop_desc, (VOPFUNC)nop_abortop },    /* abortop */
        { &vop_inactive_desc, (VOPFUNC)cd9660_inactive },/* inactive */
        { &vop_reclaim_desc, (VOPFUNC)cd9660_reclaim }, /* reclaim */
        { &vop_lock_desc, (VOPFUNC)cd9660_lock },       /* lock */
        { &vop_unlock_desc, (VOPFUNC)cd9660_unlock },   /* unlock */
        { &vop_bmap_desc, (VOPFUNC)cd9660_bmap },       /* bmap */
        { &vop_strategy_desc, (VOPFUNC)cd9660_strategy },/* strategy */
        { &vop_print_desc, (VOPFUNC)cd9660_print },     /* print */
        { &vop_islocked_desc, (VOPFUNC)cd9660_islocked },/* islocked */
        { &vop_pathconf_desc, (VOPFUNC)cd9660_pathconf },/* pathconf */
        { &vop_advlock_desc, (VOPFUNC)cd9660_advlock }, /* advlock */
        { &vop_blkatoff_desc, (VOPFUNC)cd9660_blkatoff },/* blkatoff */
        { &vop_valloc_desc, (VOPFUNC)cd9660_valloc },   /* valloc */
        { &vop_vfree_desc, (VOPFUNC)cd9660_vfree },     /* vfree */
        { &vop_truncate_desc, (VOPFUNC)cd9660_truncate },/* truncate */
        { &vop_update_desc, (VOPFUNC)cd9660_update },   /* update */
        { &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
        { &vop_pagein_desc, (VOPFUNC)cd9660_pagein },           /* Pagein */
        { &vop_pageout_desc, (VOPFUNC)cd9660_pageout },         /* Pageout */
        { &vop_getattrlist_desc, (VOPFUNC)cd9660_getattrlist }, /* getattrlist */
        { &vop_blktooff_desc, (VOPFUNC)cd9660_blktooff },       /* blktooff */
        { &vop_offtoblk_desc, (VOPFUNC)cd9660_offtoblk },       /* offtoblk */
        { &vop_cmap_desc, (VOPFUNC)cd9660_cmap },               /* cmap */
        { (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc cd9660_vnodeop_opv_desc =
        { &cd9660_vnodeop_p, cd9660_vnodeop_entries };

/*
 * The VOP table for CD-ROM XA (media) files is almost the same
 * as for ordinary files, except for read, and pagein.
 * Note that cd9660_xa_read doesn't use cluster I/O, so cmap
 * isn't needed, and isn't implemented.  Similarly, it doesn't
 * do bread() on CD XA vnodes, so bmap, blktooff, offtoblk
 * aren't needed.
 */
int (**cd9660_cdxaop_p)(void *);
struct vnodeopv_entry_desc cd9660_cdxaop_entries[] = {
        { &vop_default_desc, (VOPFUNC)vn_default_error },
        { &vop_lookup_desc, (VOPFUNC)cd9660_lookup },   /* lookup */
        { &vop_create_desc, (VOPFUNC)cd9660_create },   /* create */
        { &vop_mknod_desc, (VOPFUNC)cd9660_mknod },     /* mknod */
        { &vop_open_desc, (VOPFUNC)cd9660_open },       /* open */
        { &vop_close_desc, (VOPFUNC)cd9660_close },     /* close */
        { &vop_access_desc, (VOPFUNC)cd9660_access },   /* access */
        { &vop_getattr_desc, (VOPFUNC)cd9660_getattr }, /* getattr */
        { &vop_setattr_desc, (VOPFUNC)cd9660_setattr }, /* setattr */
        { &vop_read_desc, (VOPFUNC)cd9660_xa_read },    /* read */
        { &vop_write_desc, (VOPFUNC)cd9660_write },     /* write */
        { &vop_lease_desc, (VOPFUNC)cd9660_lease_check },/* lease */
        { &vop_ioctl_desc, (VOPFUNC)cd9660_ioctl },     /* ioctl */
        { &vop_select_desc, (VOPFUNC)cd9660_select },   /* select */
        { &vop_mmap_desc, (VOPFUNC)cd9660_mmap },       /* mmap */
        { &vop_fsync_desc, (VOPFUNC)cd9660_fsync },     /* fsync */
        { &vop_seek_desc, (VOPFUNC)cd9660_seek },       /* seek */
        { &vop_remove_desc, (VOPFUNC)cd9660_remove },   /* remove */
        { &vop_link_desc, (VOPFUNC)cd9660_link },       /* link */
        { &vop_rename_desc, (VOPFUNC)cd9660_rename },   /* rename */
        { &vop_copyfile_desc, (VOPFUNC)cd9660_copyfile },/* copyfile */
        { &vop_mkdir_desc, (VOPFUNC)cd9660_mkdir },     /* mkdir */
        { &vop_rmdir_desc, (VOPFUNC)cd9660_rmdir },     /* rmdir */
        { &vop_symlink_desc, (VOPFUNC)cd9660_symlink }, /* symlink */
        { &vop_readdir_desc, (VOPFUNC)cd9660_readdir }, /* readdir */
        { &vop_readlink_desc, (VOPFUNC)cd9660_readlink },/* readlink */
        { &vop_inactive_desc, (VOPFUNC)cd9660_inactive },/* inactive */
        { &vop_reclaim_desc, (VOPFUNC)cd9660_reclaim }, /* reclaim */
        { &vop_lock_desc, (VOPFUNC)cd9660_lock },       /* lock */
        { &vop_unlock_desc, (VOPFUNC)cd9660_unlock },   /* unlock */
        { &vop_strategy_desc, (VOPFUNC)cd9660_strategy },/* strategy */
        { &vop_print_desc, (VOPFUNC)cd9660_print },     /* print */
        { &vop_islocked_desc, (VOPFUNC)cd9660_islocked },/* islocked */
        { &vop_pathconf_desc, (VOPFUNC)cd9660_pathconf },/* pathconf */
        { &vop_advlock_desc, (VOPFUNC)cd9660_advlock }, /* advlock */
        { &vop_blkatoff_desc, (VOPFUNC)cd9660_blkatoff },/* blkatoff */
        { &vop_valloc_desc, (VOPFUNC)cd9660_valloc },   /* valloc */
        { &vop_vfree_desc, (VOPFUNC)cd9660_vfree },     /* vfree */
        { &vop_truncate_desc, (VOPFUNC)cd9660_truncate },/* truncate */
        { &vop_update_desc, (VOPFUNC)cd9660_update },   /* update */
        { &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
        { &vop_pagein_desc, (VOPFUNC)cd9660_xa_pagein },                /* Pagein */
        { &vop_pageout_desc, (VOPFUNC)cd9660_pageout },         /* Pageout */
        { &vop_getattrlist_desc, (VOPFUNC)cd9660_getattrlist }, /* getattrlist */
        { (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc cd9660_cdxaop_opv_desc =
        { &cd9660_cdxaop_p, cd9660_cdxaop_entries };

/*
 * Special device vnode ops
 */
int (**cd9660_specop_p)(void *);
struct vnodeopv_entry_desc cd9660_specop_entries[] = {
        { &vop_default_desc, (VOPFUNC)vn_default_error },
        { &vop_lookup_desc, (VOPFUNC)spec_lookup },     /* lookup */
        { &vop_create_desc, (VOPFUNC)spec_create },     /* create */
        { &vop_mknod_desc, (VOPFUNC)spec_mknod },       /* mknod */
        { &vop_open_desc, (VOPFUNC)spec_open },         /* open */
        { &vop_close_desc, (VOPFUNC)spec_close },       /* close */
        { &vop_access_desc, (VOPFUNC)cd9660_access },   /* access */
        { &vop_getattr_desc, (VOPFUNC)cd9660_getattr }, /* getattr */
        { &vop_setattr_desc, (VOPFUNC)cd9660_setattr }, /* setattr */
        { &vop_read_desc, (VOPFUNC)spec_read },         /* read */
        { &vop_write_desc, (VOPFUNC)spec_write },       /* write */
        { &vop_lease_desc, (VOPFUNC)spec_lease_check }, /* lease */
        { &vop_ioctl_desc, (VOPFUNC)spec_ioctl },       /* ioctl */
        { &vop_select_desc, (VOPFUNC)spec_select },     /* select */
        { &vop_mmap_desc, (VOPFUNC)spec_mmap },         /* mmap */
        { &vop_fsync_desc, (VOPFUNC)spec_fsync },       /* fsync */
        { &vop_seek_desc, (VOPFUNC)spec_seek },         /* seek */
        { &vop_remove_desc, (VOPFUNC)spec_remove },     /* remove */
        { &vop_link_desc, (VOPFUNC)spec_link },         /* link */
        { &vop_rename_desc, (VOPFUNC)spec_rename },     /* rename */
        { &vop_mkdir_desc, (VOPFUNC)spec_mkdir },       /* mkdir */
        { &vop_rmdir_desc, (VOPFUNC)spec_rmdir },       /* rmdir */
        { &vop_symlink_desc, (VOPFUNC)spec_symlink },   /* symlink */
        { &vop_readdir_desc, (VOPFUNC)spec_readdir },   /* readdir */
        { &vop_readlink_desc, (VOPFUNC)spec_readlink }, /* readlink */
        { &vop_abortop_desc, (VOPFUNC)spec_abortop },   /* abortop */
        { &vop_inactive_desc, (VOPFUNC)cd9660_inactive },/* inactive */
        { &vop_reclaim_desc, (VOPFUNC)cd9660_reclaim }, /* reclaim */
        { &vop_lock_desc, (VOPFUNC)cd9660_lock },       /* lock */
        { &vop_unlock_desc, (VOPFUNC)cd9660_unlock },   /* unlock */
        { &vop_bmap_desc, (VOPFUNC)spec_bmap },         /* bmap */
        { &vop_strategy_desc, (VOPFUNC)spec_strategy }, /* strategy */
        { &vop_print_desc, (VOPFUNC)cd9660_print },     /* print */
        { &vop_islocked_desc, (VOPFUNC)cd9660_islocked },/* islocked */
        { &vop_pathconf_desc, (VOPFUNC)spec_pathconf }, /* pathconf */
        { &vop_advlock_desc, (VOPFUNC)spec_advlock },   /* advlock */
        { &vop_blkatoff_desc, (VOPFUNC)spec_blkatoff }, /* blkatoff */
        { &vop_valloc_desc, (VOPFUNC)spec_valloc },     /* valloc */
        { &vop_vfree_desc, (VOPFUNC)spec_vfree },       /* vfree */
        { &vop_truncate_desc, (VOPFUNC)spec_truncate }, /* truncate */
        { &vop_update_desc, (VOPFUNC)cd9660_update },   /* update */
        { &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
        { &vop_devblocksize_desc, (VOPFUNC)spec_devblocksize }, /* devblocksize */
        { &vop_pagein_desc, (VOPFUNC)cd9660_pagein },           /* Pagein */
        { &vop_pageout_desc, (VOPFUNC)cd9660_pageout },         /* Pageout */
        { &vop_blktooff_desc, (VOPFUNC)cd9660_blktooff },       /* blktooff */
        { &vop_offtoblk_desc, (VOPFUNC)cd9660_offtoblk },       /* offtoblk */
        { &vop_cmap_desc, (VOPFUNC)cd9660_cmap },               /* cmap */
        { (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc cd9660_specop_opv_desc =
        { &cd9660_specop_p, cd9660_specop_entries };

#if FIFO
int (**cd9660_fifoop_p)(void *);
struct vnodeopv_entry_desc cd9660_fifoop_entries[] = {
        { &vop_default_desc, (VOPFUNC)vn_default_error },
        { &vop_lookup_desc, (VOPFUNC)fifo_lookup },     /* lookup */
        { &vop_create_desc, (VOPFUNC)fifo_create },     /* create */
        { &vop_mknod_desc, (VOPFUNC)fifo_mknod },       /* mknod */
        { &vop_open_desc, (VOPFUNC)fifo_open },         /* open */
        { &vop_close_desc, (VOPFUNC)fifo_close },       /* close */
        { &vop_access_desc, (VOPFUNC)cd9660_access },   /* access */
        { &vop_getattr_desc, (VOPFUNC)cd9660_getattr }, /* getattr */
        { &vop_setattr_desc, (VOPFUNC)cd9660_setattr }, /* setattr */
        { &vop_read_desc, (VOPFUNC)fifo_read },         /* read */
        { &vop_write_desc, (VOPFUNC)fifo_write },       /* write */
        { &vop_lease_desc, (VOPFUNC)fifo_lease_check }, /* lease */
        { &vop_ioctl_desc, (VOPFUNC)fifo_ioctl },       /* ioctl */
        { &vop_select_desc, (VOPFUNC)fifo_select },     /* select */
        { &vop_mmap_desc, (VOPFUNC)fifo_mmap },         /* mmap */
        { &vop_fsync_desc, (VOPFUNC)fifo_fsync },       /* fsync */
        { &vop_seek_desc, (VOPFUNC)fifo_seek },         /* seek */
        { &vop_remove_desc, (VOPFUNC)fifo_remove },     /* remove */
        { &vop_link_desc, (VOPFUNC)fifo_link }  ,       /* link */
        { &vop_rename_desc, (VOPFUNC)fifo_rename },     /* rename */
        { &vop_mkdir_desc, (VOPFUNC)fifo_mkdir },       /* mkdir */
        { &vop_rmdir_desc, (VOPFUNC)fifo_rmdir },       /* rmdir */
        { &vop_symlink_desc, (VOPFUNC)fifo_symlink },   /* symlink */
        { &vop_readdir_desc, (VOPFUNC)fifo_readdir },   /* readdir */
        { &vop_readlink_desc, (VOPFUNC)fifo_readlink }, /* readlink */
        { &vop_abortop_desc, (VOPFUNC)fifo_abortop },   /* abortop */
        { &vop_inactive_desc, (VOPFUNC)cd9660_inactive },/* inactive */
        { &vop_reclaim_desc, (VOPFUNC)cd9660_reclaim }, /* reclaim */
        { &vop_lock_desc, (VOPFUNC)cd9660_lock },       /* lock */
        { &vop_unlock_desc, (VOPFUNC)cd9660_unlock },   /* unlock */
        { &vop_bmap_desc, (VOPFUNC)fifo_bmap },         /* bmap */
        { &vop_strategy_desc, (VOPFUNC)fifo_strategy }, /* strategy */
        { &vop_print_desc, (VOPFUNC)cd9660_print },     /* print */
        { &vop_islocked_desc, (VOPFUNC)cd9660_islocked },/* islocked */
        { &vop_pathconf_desc, (VOPFUNC)fifo_pathconf }, /* pathconf */
        { &vop_advlock_desc, (VOPFUNC)fifo_advlock },   /* advlock */
        { &vop_blkatoff_desc, (VOPFUNC)fifo_blkatoff }, /* blkatoff */
        { &vop_valloc_desc, (VOPFUNC)fifo_valloc },     /* valloc */
        { &vop_vfree_desc, (VOPFUNC)fifo_vfree },       /* vfree */
        { &vop_truncate_desc, (VOPFUNC)fifo_truncate }, /* truncate */
        { &vop_update_desc, (VOPFUNC)cd9660_update },   /* update */
        { &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
        { &vop_pagein_desc, (VOPFUNC)cd9660_pagein },           /* Pagein */
        { &vop_pageout_desc, (VOPFUNC)cd9660_pageout },         /* Pageout */
        { &vop_blktooff_desc, (VOPFUNC)cd9660_blktooff },       /* blktooff */
        { &vop_offtoblk_desc, (VOPFUNC)cd9660_offtoblk },       /* offtoblk */
        { (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc cd9660_fifoop_opv_desc =
        { &cd9660_fifoop_p, cd9660_fifoop_entries };
#endif /* FIFO */