3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley
6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
7 * Support code is derived from software contributed to Berkeley
8 * by Atsushi Murai (amurai@spec.co.jp).
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
35 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
42 #include <sys/nlookup.h>
43 #include <sys/kernel.h>
44 #include <sys/vnode.h>
45 #include <sys/mount.h>
49 #include <sys/fcntl.h>
50 #include <sys/malloc.h>
52 #include <sys/syslog.h>
53 #include <sys/iconv.h>
55 #include <vm/vm_zone.h>
61 #include "cd9660_node.h"
62 #include "cd9660_mount.h"
64 extern struct vop_ops cd9660_vnode_vops;
65 extern struct vop_ops cd9660_spec_vops;
66 extern struct vop_ops cd9660_fifo_vops;
68 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
69 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
71 struct iconv_functions *cd9660_iconv = NULL;
73 static int cd9660_mount(struct mount *, char *, caddr_t, struct ucred *);
74 static int cd9660_unmount(struct mount *, int);
75 static int cd9660_root(struct mount *, struct vnode **);
76 static int cd9660_statfs(struct mount *, struct statfs *, struct ucred *);
77 static int cd9660_vget(struct mount *, struct vnode *, ino_t, struct vnode **);
78 static int cd9660_fhtovp(struct mount *, struct vnode *rootvp,
79 struct fid *, struct vnode **);
80 static int cd9660_checkexp(struct mount *, struct sockaddr *,
81 int *, struct ucred **);
82 static int cd9660_vptofh (struct vnode *, struct fid *);
84 static struct vfsops cd9660_vfsops = {
85 .vfs_mount = cd9660_mount,
86 .vfs_unmount = cd9660_unmount,
87 .vfs_root = cd9660_root,
88 .vfs_statfs = cd9660_statfs,
89 .vfs_vget = cd9660_vget,
90 .vfs_fhtovp = cd9660_fhtovp,
91 .vfs_checkexp = cd9660_checkexp,
92 .vfs_vptofh = cd9660_vptofh,
93 .vfs_init = cd9660_init,
94 .vfs_uninit = cd9660_uninit,
96 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
97 MODULE_VERSION(cd9660, 1);
101 * Called by vfs_mountroot when iso is going to be mounted as root.
104 static int iso_get_ssector(cdev_t dev);
105 static int iso_mountfs(struct vnode *devvp, struct mount *mp,
106 struct iso_args *argp);
109 * Try to find the start of the last data track on this CD-ROM. This
110 * is used to mount the last session of a multi-session CD. Bail out
111 * and return 0 if we fail, this is always a safe bet.
114 iso_get_ssector(cdev_t dev)
116 struct ioc_toc_header h;
117 struct ioc_read_toc_single_entry t;
120 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD,
121 proc0.p_ucred, NULL, NULL) != 0)
124 for (i = h.ending_track; i >= 0; i--) {
125 t.address_format = CD_LBA_FORMAT;
127 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD,
128 proc0.p_ucred, NULL, NULL) != 0) {
131 if ((t.entry.control & 4) != 0)
132 /* found a data track */
139 return ntohl(t.entry.addr.lba);
143 iso_mountroot(struct mount *mp)
145 struct iso_args args;
146 struct vnode *rootvp;
149 if ((error = bdevvp(rootdev, &rootvp))) {
150 kprintf("iso_mountroot: can't find rootvp\n");
153 args.flags = ISOFSMNT_ROOT;
155 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY);
156 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL);
161 args.ssector = iso_get_ssector(rootdev);
163 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY);
164 VOP_CLOSE(rootvp, FREAD, NULL);
168 kprintf("iso_mountroot(): using session at block %d\n",
170 if ((error = iso_mountfs(rootvp, mp, &args)) != 0)
173 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred);
183 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
186 struct iso_args args;
190 struct iso_mnt *imp = NULL;
191 struct nlookupdata nd;
193 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) {
194 return (iso_mountroot(mp));
196 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
199 if ((mp->mnt_flag & MNT_RDONLY) == 0)
203 * If updating, check whether changing from read-only to
204 * read/write; if there is no device name, that's all we do.
206 if (mp->mnt_flag & MNT_UPDATE) {
207 imp = VFSTOISOFS(mp);
208 if (args.fspec == NULL)
209 return (vfs_export(mp, &imp->im_export, &args.export));
212 * Not an update, or updating the name: look up the name
213 * and verify that it refers to a sensible block device.
216 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
218 error = nlookup(&nd);
220 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
225 if (!vn_isdisk(devvp, &error)) {
231 * Verify that user has necessary permissions on the device,
232 * or has superuser abilities
235 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
236 error = VOP_EACCESS(devvp, accessmode, cred);
238 error = priv_check_cred(cred, PRIV_ROOT, 0);
245 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
246 error = iso_mountfs(devvp, mp, &args);
248 if (devvp != imp->im_devvp)
249 error = EINVAL; /* needs translation */
257 imp = VFSTOISOFS(mp);
258 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
260 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
261 cd9660_statfs(mp, &mp->mnt_stat, cred);
266 * Common code for mount and mountroot
269 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp)
271 struct iso_mnt *isomp = NULL;
272 struct buf *bp = NULL;
273 struct buf *pribp = NULL, *supbp = NULL;
281 struct iso_volume_descriptor *vdp = NULL;
282 struct iso_primary_descriptor *pri = NULL;
283 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
284 struct iso_supplementary_descriptor *sup = NULL;
285 struct iso_directory_record *rootp;
286 int logical_block_size;
287 char cs_local[ICONV_CSNMAXLEN];
288 char cs_disk[ICONV_CSNMAXLEN];
290 if (!(mp->mnt_flag & MNT_RDONLY))
294 * Disallow multiple mounts of the same device.
295 * Disallow mounting of a device that is currently in use
296 * Flush out any old buffers remaining from a previous use.
298 if ((error = vfs_mountedon(devvp)))
300 if (vcount(devvp) > 0)
302 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0)))
305 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
306 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL);
311 if (dev->si_iosize_max != 0)
312 mp->mnt_iosize_max = dev->si_iosize_max;
313 if (mp->mnt_iosize_max > MAXPHYS)
314 mp->mnt_iosize_max = MAXPHYS;
318 /* This is the "logical sector size". The standard says this
319 * should be 2048 or the physical sector size on the device,
320 * whichever is greater. For now, we'll just use a constant.
322 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
325 for (iso_blknum = 16 + argp->ssector;
326 iso_blknum < 100 + argp->ssector;
328 if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize,
329 iso_bsize, &bp)) != 0)
332 vdp = (struct iso_volume_descriptor *)bp->b_data;
333 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
334 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
335 sizeof vdp->id) != 0) {
341 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
346 pri = (struct iso_primary_descriptor *)vdp;
348 (struct iso_sierra_primary_descriptor *)vdp;
352 case ISO_VD_SUPPLEMENTARY:
356 sup = (struct iso_supplementary_descriptor *)vdp;
358 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
359 if (bcmp(sup->escape, "%/@", 3) == 0)
361 if (bcmp(sup->escape, "%/C", 3) == 0)
363 if (bcmp(sup->escape, "%/E", 3) == 0)
366 if ((isonum_711 (sup->flags) & 1) &&
367 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
396 isonum_723 (high_sierra?
397 pri_sierra->logical_block_size:
398 pri->logical_block_size);
400 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
401 || (logical_block_size & (logical_block_size - 1)) != 0) {
406 rootp = (struct iso_directory_record *)
408 pri_sierra->root_directory_record:
409 pri->root_directory_record);
411 isomp = kmalloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
412 isomp->logical_block_size = logical_block_size;
413 isomp->volume_space_size =
414 isonum_733 (high_sierra?
415 pri_sierra->volume_space_size:
416 pri->volume_space_size);
417 isomp->joliet_level = 0;
419 * Since an ISO9660 multi-session CD can also access previous
420 * sessions, we have to include them into the space consider-
421 * ations. This doesn't yield a very accurate number since
422 * parts of the old sessions might be inaccessible now, but we
423 * can't do much better. This is also important for the NFS
424 * filehandle validation.
426 isomp->volume_space_size += argp->ssector;
427 bcopy (rootp, isomp->root, sizeof isomp->root);
428 isomp->root_extent = isonum_733 (rootp->extent);
429 isomp->root_size = isonum_733 (rootp->size);
431 isomp->im_bmask = logical_block_size - 1;
432 isomp->im_bshift = ffs(logical_block_size) - 1;
434 pribp->b_flags |= B_AGE;
438 mp->mnt_data = (qaddr_t)isomp;
439 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
440 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
441 mp->mnt_maxsymlinklen = 0;
442 mp->mnt_flag |= MNT_LOCAL;
443 isomp->im_mountp = mp;
445 isomp->im_devvp = devvp;
447 dev->si_mountpoint = mp;
449 /* Check the Rock Ridge Extension support */
450 if (!(argp->flags & ISOFSMNT_NORRIP)) {
451 if ((error = bread(isomp->im_devvp,
452 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)),
453 isomp->logical_block_size, &bp)) != 0)
456 rootp = (struct iso_directory_record *)bp->b_data;
458 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
459 argp->flags |= ISOFSMNT_NORRIP;
461 argp->flags &= ~ISOFSMNT_GENS;
465 * The contents are valid,
466 * but they will get reread as part of another vnode, so...
468 bp->b_flags |= B_AGE;
472 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
473 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET |
476 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
477 bcopy(argp->cs_local, cs_local, sizeof(cs_local));
478 bcopy(argp->cs_disk, cs_disk, sizeof(cs_disk));
479 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l);
480 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d);
482 isomp->im_d2l = NULL;
483 isomp->im_l2d = NULL;
487 /* this effectively ignores all the mount flags */
488 log(LOG_INFO, "cd9660: High Sierra Format\n");
489 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
491 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
493 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
495 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
496 isomp->iso_ftype = ISO_FTYPE_9660;
499 log(LOG_INFO, "cd9660: RockRidge Extension\n");
500 isomp->iso_ftype = ISO_FTYPE_RRIP;
505 /* Decide whether to use the Joliet descriptor */
507 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
508 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
509 rootp = (struct iso_directory_record *)
510 sup->root_directory_record;
511 bcopy (rootp, isomp->root, sizeof isomp->root);
512 isomp->root_extent = isonum_733 (rootp->extent);
513 isomp->root_size = isonum_733 (rootp->size);
514 isomp->joliet_level = joliet_level;
515 supbp->b_flags |= B_AGE;
523 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops);
524 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops);
525 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops);
529 dev->si_mountpoint = NULL;
537 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
538 VOP_CLOSE(devvp, FREAD, NULL);
542 kfree((caddr_t)isomp, M_ISOFSMNT);
543 mp->mnt_data = (qaddr_t)0;
549 * unmount system call
552 cd9660_unmount(struct mount *mp, int mntflags)
554 struct iso_mnt *isomp;
555 int error, flags = 0;
557 if (mntflags & MNT_FORCE)
564 if ((error = vflush(mp, 0, flags)))
567 isomp = VFSTOISOFS(mp);
569 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
571 cd9660_iconv->close(isomp->im_d2l);
573 cd9660_iconv->close(isomp->im_l2d);
576 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
577 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
578 error = VOP_CLOSE(isomp->im_devvp, FREAD, NULL);
579 vn_unlock(isomp->im_devvp);
580 vrele(isomp->im_devvp);
581 kfree((caddr_t)isomp, M_ISOFSMNT);
582 mp->mnt_data = (qaddr_t)0;
583 mp->mnt_flag &= ~MNT_LOCAL;
588 * Return root of a filesystem
591 cd9660_root(struct mount *mp, struct vnode **vpp)
593 struct iso_mnt *imp = VFSTOISOFS(mp);
594 struct iso_directory_record *dp =
595 (struct iso_directory_record *)imp->root;
596 ino_t ino = isodirino(dp, imp);
599 * With RRIP we must use the `.' entry of the root directory.
600 * Simply tell vget, that it's a relocated directory.
602 return (cd9660_vget_internal(mp, ino, vpp,
603 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
607 * Get filesystem statistics.
610 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
612 struct iso_mnt *isomp;
614 isomp = VFSTOISOFS(mp);
616 sbp->f_bsize = isomp->logical_block_size;
617 sbp->f_iosize = sbp->f_bsize; /* XXX */
618 sbp->f_blocks = isomp->volume_space_size;
619 sbp->f_bfree = 0; /* total free blocks */
620 sbp->f_bavail = 0; /* blocks free for non superuser */
621 sbp->f_files = 0; /* total files */
622 sbp->f_ffree = 0; /* free file nodes */
623 if (sbp != &mp->mnt_stat) {
624 sbp->f_type = mp->mnt_vfc->vfc_typenum;
625 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
631 * File handle to vnode
633 * Have to be really careful about stale file handles:
634 * - check that the inode number is in range
635 * - call iget() to get the locked inode
636 * - check for an unallocated inode (i_mode == 0)
637 * - check that the generation number matches
649 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp,
650 struct fid *fhp, struct vnode **vpp)
652 struct ifid *ifhp = (struct ifid *)fhp;
658 kprintf("fhtovp: ino %d, start %ld\n",
659 ifhp->ifid_ino, ifhp->ifid_start);
662 if ((error = VFS_VGET(mp, NULL, ifhp->ifid_ino, &nvp)) != 0) {
667 if (ip->inode.iso_mode == 0) {
677 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
678 struct ucred **credanonp)
683 imp = VFSTOISOFS(mp);
686 * Get the export permission structure for this <mp, client> tuple.
688 np = vfs_export_lookup(mp, &imp->im_export, nam);
692 *exflagsp = np->netc_exflags;
693 *credanonp = &np->netc_anon;
698 cd9660_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp)
703 * It would be nice if we didn't always set the `relocated' flag
704 * and force the extra read, but I don't want to think about fixing
707 return (cd9660_vget_internal(mp, ino, vpp,
709 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
717 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
718 int relocated, struct iso_directory_record *isodir)
727 imp = VFSTOISOFS(mp);
730 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
733 /* Allocate a new vnode/iso_node. */
734 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0);
739 ip = kmalloc(sizeof(struct iso_node), M_ISOFSNODE, M_WAITOK | M_ZERO);
745 * Insert it into the inode hash table and check for a collision.
746 * If a collision occurs, throw away the vnode and try again.
748 if (cd9660_ihashins(ip) != 0) {
749 kprintf("debug: cd9660 ihashins collision, retrying\n");
751 kfree(ip, M_ISOFSNODE);
756 if (isodir == NULL) {
759 lbn = lblkno(imp, ino);
760 if (lbn >= imp->volume_space_size) {
762 kprintf("fhtovp: lbn exceed volume space %d\n", lbn);
766 off = blkoff(imp, ino);
767 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
769 kprintf("fhtovp: crosses block boundary %d\n",
770 off + ISO_DIRECTORY_RECORD_SIZE);
774 error = bread(imp->im_devvp,
776 imp->logical_block_size, &bp);
780 kprintf("fhtovp: bread error %d\n",error);
783 isodir = (struct iso_directory_record *)(bp->b_data + off);
785 if (off + isonum_711(isodir->length) >
786 imp->logical_block_size) {
790 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
791 off +isonum_711(isodir->length), off,
792 isonum_711(isodir->length));
797 if (isonum_733(isodir->extent) +
798 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
801 kprintf("fhtovp: file start miss %d vs %d\n",
802 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
811 ip->i_devvp = imp->im_devvp;
816 * On relocated directories we must
817 * read the `.' entry out of a dir.
819 ip->iso_start = ino >> imp->im_bshift;
822 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
826 isodir = (struct iso_directory_record *)bp->b_data;
829 ip->iso_extent = isonum_733(isodir->extent);
830 ip->i_size = isonum_733(isodir->size);
831 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
834 * Setup time stamp, attribute
837 switch (imp->iso_ftype) {
838 default: /* ISO_FTYPE_9660 */
842 if ((imp->im_flags & ISOFSMNT_EXTATT)
843 && (off = isonum_711(isodir->ext_attr_length)))
844 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
848 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
849 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
855 cd9660_rrip_analyze(isodir, ip, imp);
863 * Initialize the associated vnode
865 vp->v_type = IFTOVT(ip->inode.iso_mode);
867 switch (vp->v_type) {
869 vp->v_ops = &mp->mnt_vn_fifo_ops;
873 vp->v_ops = &mp->mnt_vn_spec_ops;
874 addaliasu(vp, umajor(ip->inode.iso_rdev),
875 uminor(ip->inode.iso_rdev));
879 vinitvmio(vp, ip->i_size, PAGE_SIZE, -1);
885 if (ip->iso_extent == imp->root_extent)
886 vsetflags(vp, VROOT);
889 * Return the locked and refd vp
896 * Vnode pointer to File handle
900 cd9660_vptofh(struct vnode *vp, struct fid *fhp)
902 struct iso_node *ip = VTOI(vp);
905 ifhp = (struct ifid *)fhp;
906 ifhp->ifid_len = sizeof(struct ifid);
908 ifhp->ifid_ino = ip->i_number;
909 ifhp->ifid_start = ip->iso_start;
912 kprintf("vptofh: ino %d, start %ld\n",
913 ifhp->ifid_ino,ifhp->ifid_start);