1/*-
2 * Copyright (c) 1994
3 * The Regents of the University of California. All rights reserved.
4 *
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).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
39 * $FreeBSD: head/sys/fs/cd9660/cd9660_vfsops.c 112119 2003-03-11 22:15:10Z kan $
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/namei.h>
45#include <sys/proc.h>
46#include <sys/kernel.h>
47#include <sys/vnode.h>
48#include <sys/mount.h>
49#include <sys/bio.h>
50#include <sys/buf.h>
51#include <sys/cdio.h>
52#include <sys/conf.h>
53#include <sys/fcntl.h>
54#include <sys/malloc.h>
55#include <sys/stat.h>
56#include <sys/syslog.h>
57
58
59#include <isofs/cd9660/iso.h>
60#include <isofs/cd9660/iso_rrip.h>
61#include <isofs/cd9660/cd9660_node.h>
62#include <isofs/cd9660/cd9660_mount.h>
63
64MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
65MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
66
67static vfs_mount_t cd9660_mount;
68static vfs_unmount_t cd9660_unmount;
69static vfs_root_t cd9660_root;
70static vfs_statfs_t cd9660_statfs;
71static vfs_vget_t cd9660_vget;
72static vfs_fhtovp_t cd9660_fhtovp;
73static vfs_vptofh_t cd9660_vptofh;
74
75static struct vfsops cd9660_vfsops = {
76 cd9660_mount,
77 vfs_stdstart,
78 cd9660_unmount,
79 cd9660_root,
80 vfs_stdquotactl,
81 cd9660_statfs,
82 vfs_stdnosync,
83 cd9660_vget,
84 cd9660_fhtovp,
85 vfs_stdcheckexp,
86 cd9660_vptofh,
87 cd9660_init,
88 cd9660_uninit,
89 vfs_stdextattrctl,
90};
91VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
92MODULE_VERSION(cd9660, 1);
93
94
95/*
96 * Called by vfs_mountroot when iso is going to be mounted as root.
97 */
98
99static int iso_get_ssector(dev_t dev, struct thread *td);
100static int iso_mountfs(struct vnode *devvp, struct mount *mp,
101 struct thread *td, struct iso_args *argp);
102
103/*
104 * Try to find the start of the last data track on this CD-ROM. This
105 * is used to mount the last session of a multi-session CD. Bail out
106 * and return 0 if we fail, this is always a safe bet.
107 */
108static int
109iso_get_ssector(dev, td)
110 dev_t dev;
111 struct thread *td;
112{
113 struct ioc_toc_header h;
114 struct ioc_read_toc_single_entry t;
115 int i;
116 struct cdevsw *bd;
117 d_ioctl_t *ioctlp;
118
119 bd = devsw(dev);
120 ioctlp = bd->d_ioctl;
121 if (ioctlp == NULL)
122 return 0;
123
124 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
125 return 0;
126
127 for (i = h.ending_track; i >= 0; i--) {
128 t.address_format = CD_LBA_FORMAT;
129 t.track = i;
130 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0)
131 return 0;
132 if ((t.entry.control & 4) != 0)
133 /* found a data track */
134 break;
135 }
136
137 if (i < 0)
138 return 0;
139
140 return ntohl(t.entry.addr.lba);
141}
142
143static int iso_mountroot(struct mount *mp, struct thread *td);
144
145static int
146iso_mountroot(mp, td)
147 struct mount *mp;
148 struct thread *td;
149{
150 struct iso_args args;
151 int error;
152
153 if ((error = bdevvp(rootdev, &rootvp))) {
154 printf("iso_mountroot: can't find rootvp\n");
155 return (error);
156 }
157 args.flags = ISOFSMNT_ROOT;
158
159 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
160 error = VOP_OPEN(rootvp, FREAD, FSCRED, td);
161 VOP_UNLOCK(rootvp, 0, td);
162 if (error)
163 return error;
164
165 args.ssector = iso_get_ssector(rootdev, td);
166
167 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, td);
168
169 if (bootverbose)
170 printf("iso_mountroot(): using session at block %d\n",
171 args.ssector);
172 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
173 return (error);
174
175 (void)cd9660_statfs(mp, &mp->mnt_stat, td);
176 return (0);
177}
178
179/*
180 * VFS Operations.
181 *
182 * mount system call
183 */
184static int
185cd9660_mount(mp, path, data, ndp, td)
186 register struct mount *mp;
187 char *path;
188 caddr_t data;
189 struct nameidata *ndp;
190 struct thread *td;
191{
192 struct vnode *devvp;
193 struct iso_args args;
194 size_t size;
195 int error;
196 mode_t accessmode;
197 struct iso_mnt *imp = 0;
198
199 if (path == NULL) /* We are doing the initial root mount */
200 return (iso_mountroot(mp, td));
201 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
202 return (error);
203
204 if ((mp->mnt_flag & MNT_RDONLY) == 0)
205 return (EROFS);
206
207 /*
208 * If updating, check whether changing from read-only to
209 * read/write; if there is no device name, that's all we do.
210 */
211 if (mp->mnt_flag & MNT_UPDATE) {
212 imp = VFSTOISOFS(mp);
213 if (args.fspec == 0)
214 return (vfs_export(mp, &args.export));
215 }
216 /*
217 * Not an update, or updating the name: look up the name
218 * and verify that it refers to a sensible block device.
219 */
220 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td);
221 if ((error = namei(ndp)))
222 return (error);
223 NDFREE(ndp, NDF_ONLY_PNBUF);
224 devvp = ndp->ni_vp;
225
226 if (!vn_isdisk(devvp, &error)) {
227 vrele(devvp);
228 return (error);
229 }
230
231 /*
232 * Verify that user has necessary permissions on the device,
233 * or has superuser abilities
234 */
235 accessmode = VREAD;
236 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
237 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td);
238 if (error)
239 error = suser(td);
240 if (error) {
241 vput(devvp);
242 return (error);
243 }
244 VOP_UNLOCK(devvp, 0, td);
245
246 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
247 error = iso_mountfs(devvp, mp, td, &args);
248 } else {
249 if (devvp != imp->im_devvp)
250 error = EINVAL; /* needs translation */
251 else
252 vrele(devvp);
253 }
254 if (error) {
255 vrele(devvp);
256 return error;
257 }
258 imp = VFSTOISOFS(mp);
259 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
260 &size);
261 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
262 (void) cd9660_statfs(mp, &mp->mnt_stat, td);
263 return 0;
264}
265
266/*
267 * Common code for mount and mountroot
268 */
269static int
270iso_mountfs(devvp, mp, td, argp)
271 register struct vnode *devvp;
272 struct mount *mp;
273 struct thread *td;
274 struct iso_args *argp;
275{
276 register struct iso_mnt *isomp = (struct iso_mnt *)0;
277 struct buf *bp = NULL;
278 struct buf *pribp = NULL, *supbp = NULL;
279 dev_t dev = devvp->v_rdev;
280 int error = EINVAL;
281 int needclose = 0;
282 int high_sierra = 0;
283 int iso_bsize;
284 int iso_blknum;
285 int joliet_level;
286 struct iso_volume_descriptor *vdp = 0;
287 struct iso_primary_descriptor *pri = NULL;
288 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
289 struct iso_supplementary_descriptor *sup = NULL;
290 struct iso_directory_record *rootp;
291 int logical_block_size;
292
293 if (!(mp->mnt_flag & MNT_RDONLY))
294 return EROFS;
295
296 /*
297 * Disallow multiple mounts of the same device.
298 * Disallow mounting of a device that is currently in use
299 * (except for root, which might share swap device for miniroot).
300 * Flush out any old buffers remaining from a previous use.
301 */
302 if ((error = vfs_mountedon(devvp)))
303 return error;
304 if (vcount(devvp) > 1 && devvp != rootvp)
305 return EBUSY;
306 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0)))
307 return (error);
308
309 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
310 error = VOP_OPEN(devvp, FREAD, FSCRED, td);
311 VOP_UNLOCK(devvp, 0, td);
312 if (error)
313 return error;
314 if (devvp->v_rdev->si_iosize_max != 0)
315 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
316 if (mp->mnt_iosize_max > MAXPHYS)
317 mp->mnt_iosize_max = MAXPHYS;
318
319 needclose = 1;
320
321 /* This is the "logical sector size". The standard says this
322 * should be 2048 or the physical sector size on the device,
323 * whichever is greater. For now, we'll just use a constant.
324 */
325 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
326
327 joliet_level = 0;
328 for (iso_blknum = 16 + argp->ssector;
329 iso_blknum < 100 + argp->ssector;
330 iso_blknum++) {
331 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
332 iso_bsize, NOCRED, &bp)) != 0)
333 goto out;
334
335 vdp = (struct iso_volume_descriptor *)bp->b_data;
336 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
337 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
338 sizeof vdp->id) != 0) {
339 error = EINVAL;
340 goto out;
341 } else
342 high_sierra = 1;
343 }
344 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
345 case ISO_VD_PRIMARY:
346 if (pribp == NULL) {
347 pribp = bp;
348 bp = NULL;
349 pri = (struct iso_primary_descriptor *)vdp;
350 pri_sierra =
351 (struct iso_sierra_primary_descriptor *)vdp;
352 }
353 break;
354
355 case ISO_VD_SUPPLEMENTARY:
356 if (supbp == NULL) {
357 supbp = bp;
358 bp = NULL;
359 sup = (struct iso_supplementary_descriptor *)vdp;
360
361 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
362 if (bcmp(sup->escape, "%/@", 3) == 0)
363 joliet_level = 1;
364 if (bcmp(sup->escape, "%/C", 3) == 0)
365 joliet_level = 2;
366 if (bcmp(sup->escape, "%/E", 3) == 0)
367 joliet_level = 3;
368
369 if ((isonum_711 (sup->flags) & 1) &&
370 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
371 joliet_level = 0;
372 }
373 }
374 break;
375
376 case ISO_VD_END:
377 goto vd_end;
378
379 default:
380 break;
381 }
382 if (bp) {
383 brelse(bp);
384 bp = NULL;
385 }
386 }
387 vd_end:
388 if (bp) {
389 brelse(bp);
390 bp = NULL;
391 }
392
393 if (pri == NULL) {
394 error = EINVAL;
395 goto out;
396 }
397
398 logical_block_size =
399 isonum_723 (high_sierra?
400 pri_sierra->logical_block_size:
401 pri->logical_block_size);
402
403 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
404 || (logical_block_size & (logical_block_size - 1)) != 0) {
405 error = EINVAL;
406 goto out;
407 }
408
409 rootp = (struct iso_directory_record *)
410 (high_sierra?
411 pri_sierra->root_directory_record:
412 pri->root_directory_record);
413
414 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
415 isomp->logical_block_size = logical_block_size;
416 isomp->volume_space_size =
417 isonum_733 (high_sierra?
418 pri_sierra->volume_space_size:
419 pri->volume_space_size);
420 isomp->joliet_level = 0;
421 /*
422 * Since an ISO9660 multi-session CD can also access previous
423 * sessions, we have to include them into the space consider-
424 * ations. This doesn't yield a very accurate number since
425 * parts of the old sessions might be inaccessible now, but we
426 * can't do much better. This is also important for the NFS
427 * filehandle validation.
428 */
429 isomp->volume_space_size += argp->ssector;
430 bcopy (rootp, isomp->root, sizeof isomp->root);
431 isomp->root_extent = isonum_733 (rootp->extent);
432 isomp->root_size = isonum_733 (rootp->size);
433
434 isomp->im_bmask = logical_block_size - 1;
435 isomp->im_bshift = ffs(logical_block_size) - 1;
436
437 pribp->b_flags |= B_AGE;
438 brelse(pribp);
439 pribp = NULL;
440
441 mp->mnt_data = (qaddr_t)isomp;
442 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
443 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
444 mp->mnt_maxsymlinklen = 0;
445 mp->mnt_flag |= MNT_LOCAL;
446 isomp->im_mountp = mp;
447 isomp->im_dev = dev;
448 isomp->im_devvp = devvp;
449
450 devvp->v_rdev->si_mountpoint = mp;
451
452 /* Check the Rock Ridge Extention support */
453 if (!(argp->flags & ISOFSMNT_NORRIP)) {
454 if ((error = bread(isomp->im_devvp,
455 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
456 (isomp->im_bshift - DEV_BSHIFT),
457 isomp->logical_block_size, NOCRED, &bp)) != 0)
458 goto out;
459
460 rootp = (struct iso_directory_record *)bp->b_data;
461
462 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
463 argp->flags |= ISOFSMNT_NORRIP;
464 } else {
465 argp->flags &= ~ISOFSMNT_GENS;
466 }
467
468 /*
469 * The contents are valid,
470 * but they will get reread as part of another vnode, so...
471 */
472 bp->b_flags |= B_AGE;
473 brelse(bp);
474 bp = NULL;
475 }
476 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
477 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
478
479 if (high_sierra) {
480 /* this effectively ignores all the mount flags */
481 log(LOG_INFO, "cd9660: High Sierra Format\n");
482 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
483 } else
484 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
485 default:
486 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
487 break;
488 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
489 isomp->iso_ftype = ISO_FTYPE_9660;
490 break;
491 case 0:
492 log(LOG_INFO, "cd9660: RockRidge Extension\n");
493 isomp->iso_ftype = ISO_FTYPE_RRIP;
494 break;
495 }
496
497 /* Decide whether to use the Joliet descriptor */
498
499 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
500 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
501 rootp = (struct iso_directory_record *)
502 sup->root_directory_record;
503 bcopy (rootp, isomp->root, sizeof isomp->root);
504 isomp->root_extent = isonum_733 (rootp->extent);
505 isomp->root_size = isonum_733 (rootp->size);
506 isomp->joliet_level = joliet_level;
507 supbp->b_flags |= B_AGE;
508 }
509
510 if (supbp) {
511 brelse(supbp);
512 supbp = NULL;
513 }
514
515 return 0;
516out:
517 devvp->v_rdev->si_mountpoint = NULL;
518 if (bp)
519 brelse(bp);
520 if (pribp)
521 brelse(pribp);
522 if (supbp)
523 brelse(supbp);
524 if (needclose)
525 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td);
526 if (isomp) {
527 free((caddr_t)isomp, M_ISOFSMNT);
528 mp->mnt_data = (qaddr_t)0;
529 }
530 return error;
531}
532
533/*
534 * unmount system call
535 */
536static int
537cd9660_unmount(mp, mntflags, td)
538 struct mount *mp;
539 int mntflags;
540 struct thread *td;
541{
542 register struct iso_mnt *isomp;
543 int error, flags = 0;
544
545 if (mntflags & MNT_FORCE)
546 flags |= FORCECLOSE;
547#if 0
548 mntflushbuf(mp, 0);
549 if (mntinvalbuf(mp))
550 return EBUSY;
551#endif
552 if ((error = vflush(mp, 0, flags)))
553 return (error);
554
555 isomp = VFSTOISOFS(mp);
556
557 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
558 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td);
559 vrele(isomp->im_devvp);
560 free((caddr_t)isomp, M_ISOFSMNT);
561 mp->mnt_data = (qaddr_t)0;
562 mp->mnt_flag &= ~MNT_LOCAL;
563 return (error);
564}
565
566/*
567 * Return root of a filesystem
568 */
569static int
570cd9660_root(mp, vpp)
571 struct mount *mp;
572 struct vnode **vpp;
573{
574 struct iso_mnt *imp = VFSTOISOFS(mp);
575 struct iso_directory_record *dp =
576 (struct iso_directory_record *)imp->root;
577 ino_t ino = isodirino(dp, imp);
578
579 /*
580 * With RRIP we must use the `.' entry of the root directory.
581 * Simply tell vget, that it's a relocated directory.
582 */
583 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp,
584 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
585}
586
587/*
588 * Get filesystem statistics.
589 */
590static int
591cd9660_statfs(mp, sbp, td)
592 struct mount *mp;
593 register struct statfs *sbp;
594 struct thread *td;
595{
596 register struct iso_mnt *isomp;
597
598 isomp = VFSTOISOFS(mp);
599
600 sbp->f_bsize = isomp->logical_block_size;
601 sbp->f_iosize = sbp->f_bsize; /* XXX */
602 sbp->f_blocks = isomp->volume_space_size;
603 sbp->f_bfree = 0; /* total free blocks */
604 sbp->f_bavail = 0; /* blocks free for non superuser */
605 sbp->f_files = 0; /* total files */
606 sbp->f_ffree = 0; /* free file nodes */
607 if (sbp != &mp->mnt_stat) {
608 sbp->f_type = mp->mnt_vfc->vfc_typenum;
609 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
610 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
611 }
612 return 0;
613}
614
615/*
616 * File handle to vnode
617 *
618 * Have to be really careful about stale file handles:
619 * - check that the inode number is in range
620 * - call iget() to get the locked inode
621 * - check for an unallocated inode (i_mode == 0)
622 * - check that the generation number matches
623 */
624
625struct ifid {
626 ushort ifid_len;
627 ushort ifid_pad;
628 int ifid_ino;
629 long ifid_start;
630};
631
632/* ARGSUSED */
633static int
634cd9660_fhtovp(mp, fhp, vpp)
635 register struct mount *mp;
636 struct fid *fhp;
637 struct vnode **vpp;
638{
639 struct ifid *ifhp = (struct ifid *)fhp;
640 register struct iso_node *ip;
641 struct vnode *nvp;
642 int error;
643
644#ifdef ISOFS_DBG
645 printf("fhtovp: ino %d, start %ld\n",
646 ifhp->ifid_ino, ifhp->ifid_start);
647#endif
648
649 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
650 *vpp = NULLVP;
651 return (error);
652 }
653 ip = VTOI(nvp);
654 if (ip->inode.iso_mode == 0) {
655 vput(nvp);
656 *vpp = NULLVP;
657 return (ESTALE);
658 }
659 *vpp = nvp;
660 return (0);
661}
662
663static int
664cd9660_vget(mp, ino, flags, vpp)
665 struct mount *mp;
666 ino_t ino;
667 int flags;
668 struct vnode **vpp;
669{
670
671 /*
672 * XXXX
673 * It would be nice if we didn't always set the `relocated' flag
674 * and force the extra read, but I don't want to think about fixing
675 * that right now.
676 */
677 return (cd9660_vget_internal(mp, ino, flags, vpp,
678#if 0
679 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
680#else
681 0,
682#endif
683 (struct iso_directory_record *)0));
684}
685
686int
687cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
688 struct mount *mp;
689 ino_t ino;
690 int flags;
691 struct vnode **vpp;
692 int relocated;
693 struct iso_directory_record *isodir;
694{
695 struct iso_mnt *imp;
696 struct iso_node *ip;
697 struct buf *bp;
698 struct vnode *vp;
699 dev_t dev;
700 int error;
701
702 imp = VFSTOISOFS(mp);
703 dev = imp->im_dev;
704 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0)
705 return (error);
706 if (*vpp != NULL)
707 return (0);
708
709 /* Allocate a new vnode/iso_node. */
710 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) {
711 *vpp = NULLVP;
712 return (error);
713 }
714 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
715 M_WAITOK | M_ZERO);
716 vp->v_data = ip;
717 ip->i_vnode = vp;
718 ip->i_dev = dev;
719 ip->i_number = ino;
720
721 /*
722 * Check to be sure that it did not show up. We have to put it
723 * on the hash chain as the cleanup from vput expects to find
724 * it there.
725 */
726 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 ||
727 *vpp != NULL) {
728 cd9660_ihashins(ip);
729 vput(vp);
730 return (error);
731 }
732
733 /*
734 * Put it onto its hash chain and lock it so that other requests for
735 * this inode will block if they arrive while we are sleeping waiting
736 * for old data structures to be purged or for the contents of the
737 * disk portion of this inode to be read.
738 */
739 cd9660_ihashins(ip);
740
741 if (isodir == 0) {
742 int lbn, off;
743
744 lbn = lblkno(imp, ino);
745 if (lbn >= imp->volume_space_size) {
746 vput(vp);
747 printf("fhtovp: lbn exceed volume space %d\n", lbn);
748 return (ESTALE);
749 }
750
751 off = blkoff(imp, ino);
752 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
753 vput(vp);
754 printf("fhtovp: crosses block boundary %d\n",
755 off + ISO_DIRECTORY_RECORD_SIZE);
756 return (ESTALE);
757 }
758
759 error = bread(imp->im_devvp,
760 lbn << (imp->im_bshift - DEV_BSHIFT),
761 imp->logical_block_size, NOCRED, &bp);
762 if (error) {
763 vput(vp);
764 brelse(bp);
765 printf("fhtovp: bread error %d\n",error);
766 return (error);
767 }
768 isodir = (struct iso_directory_record *)(bp->b_data + off);
769
770 if (off + isonum_711(isodir->length) >
771 imp->logical_block_size) {
772 vput(vp);
773 if (bp != 0)
774 brelse(bp);
775 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
776 off +isonum_711(isodir->length), off,
777 isonum_711(isodir->length));
778 return (ESTALE);
779 }
780
781#if 0
782 if (isonum_733(isodir->extent) +
783 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
784 if (bp != 0)
785 brelse(bp);
786 printf("fhtovp: file start miss %d vs %d\n",
787 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
788 ifhp->ifid_start);
789 return (ESTALE);
790 }
791#endif
792 } else
793 bp = 0;
794
795 ip->i_mnt = imp;
796 ip->i_devvp = imp->im_devvp;
797 VREF(ip->i_devvp);
798
799 if (relocated) {
800 /*
801 * On relocated directories we must
802 * read the `.' entry out of a dir.
803 */
804 ip->iso_start = ino >> imp->im_bshift;
805 if (bp != 0)
806 brelse(bp);
807 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
808 vput(vp);
809 return (error);
810 }
811 isodir = (struct iso_directory_record *)bp->b_data;
812 }
813
814 ip->iso_extent = isonum_733(isodir->extent);
815 ip->i_size = isonum_733(isodir->size);
816 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
817
818 /*
819 * Setup time stamp, attribute
820 */
821 vp->v_type = VNON;
822 switch (imp->iso_ftype) {
823 default: /* ISO_FTYPE_9660 */
824 {
825 struct buf *bp2;
826 int off;
827 if ((imp->im_flags & ISOFSMNT_EXTATT)
828 && (off = isonum_711(isodir->ext_attr_length)))
829 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
830 &bp2);
831 else
832 bp2 = NULL;
833 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
834 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
835 if (bp2)
836 brelse(bp2);
837 break;
838 }
839 case ISO_FTYPE_RRIP:
840 cd9660_rrip_analyze(isodir, ip, imp);
841 break;
842 }
843
844 if (bp != 0)
845 brelse(bp);
846
847 /*
848 * Initialize the associated vnode
849 */
850 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
851 case VFIFO:
852 vp->v_op = cd9660_fifoop_p;
853 break;
854 case VCHR:
855 case VBLK:
856 vp->v_op = cd9660_specop_p;
857 vp = addaliasu(vp, ip->inode.iso_rdev);
858 ip->i_vnode = vp;
859 break;
860 default:
861 break;
862 }
863
864 if (ip->iso_extent == imp->root_extent)
865 vp->v_vflag |= VV_ROOT;
866
867 /*
868 * XXX need generation number?
869 */
870
871 *vpp = vp;
872 return (0);
873}
874
875/*
876 * Vnode pointer to File handle
877 */
878/* ARGSUSED */
879static int
880cd9660_vptofh(vp, fhp)
881 struct vnode *vp;
882 struct fid *fhp;
883{
884 register struct iso_node *ip = VTOI(vp);
885 register struct ifid *ifhp;
886
887 ifhp = (struct ifid *)fhp;
888 ifhp->ifid_len = sizeof(struct ifid);
889
890 ifhp->ifid_ino = ip->i_number;
891 ifhp->ifid_start = ip->iso_start;
892
893#ifdef ISOFS_DBG
894 printf("vptofh: ino %d, start %ld\n",
895 ifhp->ifid_ino,ifhp->ifid_start);
896#endif
897 return 0;
898}