summaryrefslogtreecommitdiffstats
path: root/sys/isofs/cd9660/cd9660_vfsops.c
blob: 7fd09f2d8269df628aaf1e80eec678df1752cbc1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
/*-
 * Copyright (c) 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley
 * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
 * Support code is derived from software contributed to Berkeley
 * by Atsushi Murai (amurai@spec.co.jp).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)cd9660_vfsops.c	8.3 (Berkeley) 1/31/94
 * $Id: cd9660_vfsops.c,v 1.9 1994/11/14 07:01:58 bde Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <miscfs/specfs/specdev.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/malloc.h>

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

struct vfsops cd9660_vfsops = {
	cd9660_mount,
	cd9660_start,
	cd9660_unmount,
	cd9660_root,
	cd9660_quotactl,
	cd9660_statfs,
	cd9660_sync,
	cd9660_vget,
	cd9660_fhtovp,
	cd9660_vptofh,
	cd9660_init,
};
VFS_SET(cd9660_vfsops, cd9660, MOUNT_CD9660, 0);


/*
 * Called by vfs_mountroot when iso is going to be mounted as root.
 *
 * Name is updated by mount(8) after booting.
 */
#define ROOTNAME	"root_device"

static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
			    struct proc *p, struct iso_args *argp));

int
cd9660_mountroot()
{
	register struct mount *mp;
	struct proc *p = curproc;	/* XXX */
	struct iso_mnt *imp;
	u_int size;
	int error;
	struct iso_args args;
	
	/*
	 * Get vnodes for swapdev and rootdev.
	 */
	if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp))
		panic("cd9660_mountroot: can't setup bdevvp's");

	mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
	bzero((char *)mp, (u_long)sizeof(struct mount));
	mp->mnt_op = &cd9660_vfsops;
	mp->mnt_flag = MNT_RDONLY;
	args.flags = ISOFSMNT_ROOT;
	if ((error = iso_mountfs(rootvp, mp, p, &args))) {
		free(mp, M_MOUNT);
		return (error);
	}
	if ((error = vfs_lock(mp))) {
		(void)cd9660_unmount(mp, 0, p);
		free(mp, M_MOUNT);
		return (error);
	}
	TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
	mp->mnt_flag |= MNT_ROOTFS;
	mp->mnt_vnodecovered = NULLVP;
	imp = VFSTOISOFS(mp);
	bzero(imp->im_fsmnt, sizeof(imp->im_fsmnt));
	imp->im_fsmnt[0] = '/';
	bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
	    MNAMELEN);
	(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
	    &size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
	(void) cd9660_statfs(mp, &mp->mnt_stat, p);
	vfs_unlock(mp);
	return (0);
}

/*
 * Flag to allow forcible unmounting.
 */
int iso_doforce = 1;

/*
 * VFS Operations.
 *
 * mount system call
 */
int
cd9660_mount(mp, path, data, ndp, p)
	register struct mount *mp;
	char *path;
	caddr_t data;
	struct nameidata *ndp;
	struct proc *p;
{
	struct vnode *devvp;
	struct iso_args args;
	u_int size;
	int error;
	struct iso_mnt *imp = 0;
	
	if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
		return (error);
	
	if ((mp->mnt_flag & MNT_RDONLY) == 0)
		return (EROFS);
	
	/*
	 * If updating, check whether changing from read-only to
	 * read/write; if there is no device name, that's all we do.
	 */
	if (mp->mnt_flag & MNT_UPDATE) {
		imp = VFSTOISOFS(mp);
		if (args.fspec == 0)
			return (vfs_export(mp, &imp->im_export, &args.export));
	}
	/*
	 * Not an update, or updating the name: look up the name
	 * and verify that it refers to a sensible block device.
	 */
	NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
	if ((error = namei(ndp)))
		return (error);
	devvp = ndp->ni_vp;

	if (devvp->v_type != VBLK) {
		vrele(devvp);
		return ENOTBLK;
	}
	if (major(devvp->v_rdev) >= nblkdev) {
		vrele(devvp);
		return ENXIO;
	}
	if ((mp->mnt_flag & MNT_UPDATE) == 0)
		error = iso_mountfs(devvp, mp, p, &args);
	else {
		if (devvp != imp->im_devvp)
			error = EINVAL;	/* needs translation */
		else
			vrele(devvp);
	}
	if (error) {
		vrele(devvp);
		return error;
	}
	imp = VFSTOISOFS(mp);
	(void) copyinstr(path, imp->im_fsmnt, sizeof(imp->im_fsmnt)-1, &size);
	bzero(imp->im_fsmnt + size, sizeof(imp->im_fsmnt) - size);
	bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
	    MNAMELEN);
	(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
	    &size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
	(void) cd9660_statfs(mp, &mp->mnt_stat, p);
	return 0;
}

/*
 * Common code for mount and mountroot
 */
static int
iso_mountfs(devvp, mp, p, argp)
	register struct vnode *devvp;
	struct mount *mp;
	struct proc *p;
	struct iso_args *argp;
{
	register struct iso_mnt *isomp = (struct iso_mnt *)0;
	struct buf *bp = NULL;
	dev_t dev = devvp->v_rdev;
	int error = EINVAL;
	int needclose = 0;
	int high_sierra = 0;
	int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
	int iso_bsize;
	int iso_blknum;
	struct iso_volume_descriptor *vdp;
	struct iso_primary_descriptor *pri;
	struct iso_sierra_primary_descriptor *pri_sierra;
	struct iso_directory_record *rootp;
	int logical_block_size;
	
	if (!ronly)
		return EROFS;
	
	/*
	 * Disallow multiple mounts of the same device.
	 * Disallow mounting of a device that is currently in use
	 * (except for root, which might share swap device for miniroot).
	 * Flush out any old buffers remaining from a previous use.
	 */
	if ((error = vfs_mountedon(devvp)))
		return error;
	if (vcount(devvp) > 1 && devvp != rootvp)
		return EBUSY;
	if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)))
		return (error);

	if ((error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)))
		return error;
	needclose = 1;
	
	/* This is the "logical sector size".  The standard says this
	 * should be 2048 or the physical sector size on the device,
	 * whichever is greater.  For now, we'll just use a constant.
	 */
	iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
	
	for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
		if ((error = bread (devvp, btodb(iso_blknum * iso_bsize),
				    iso_bsize, NOCRED, &bp)))
			goto out;
		
		vdp = (struct iso_volume_descriptor *)bp->b_un.b_addr;
		if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
			if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
				  sizeof vdp->id) != 0) {
				error = EINVAL;
				goto out;
			} else
				high_sierra = 1;
		}
		
		if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_END) {
			error = EINVAL;
			goto out;
		}
		
		if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_PRIMARY)
			break;
		brelse(bp);
	}
	
	if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) != ISO_VD_PRIMARY) {
		error = EINVAL;
		goto out;
	}
	
	pri = (struct iso_primary_descriptor *)vdp;
	pri_sierra = (struct iso_sierra_primary_descriptor *)vdp;
	
	logical_block_size =
		isonum_723 (high_sierra?
			    pri_sierra->logical_block_size:
			    pri->logical_block_size);
	
	if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
	    || (logical_block_size & (logical_block_size - 1)) != 0) {
		error = EINVAL;
		goto out;
	}
	
	rootp = (struct iso_directory_record *)
		(high_sierra?
		 pri_sierra->root_directory_record:
		 pri->root_directory_record);
	
	isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
	bzero((caddr_t)isomp, sizeof *isomp);
	isomp->logical_block_size = logical_block_size;
	isomp->volume_space_size =
		isonum_733 (high_sierra?
			    pri_sierra->volume_space_size:
			    pri->volume_space_size);
	bcopy (rootp, isomp->root, sizeof isomp->root);
	isomp->root_extent = isonum_733 (rootp->extent);
	isomp->root_size = isonum_733 (rootp->size);
	
	isomp->im_bmask = logical_block_size - 1;
	isomp->im_bshift = 0;
	while ((1 << isomp->im_bshift) < isomp->logical_block_size)
		isomp->im_bshift++;
	
	bp->b_flags |= B_AGE;
	brelse(bp);
	bp = NULL;
	
	mp->mnt_data = (qaddr_t)isomp;
	mp->mnt_stat.f_fsid.val[0] = (long)dev;
	mp->mnt_stat.f_fsid.val[1] = MOUNT_CD9660;
	mp->mnt_maxsymlinklen = 0;
	mp->mnt_flag |= MNT_LOCAL;
	isomp->im_mountp = mp;
	isomp->im_dev = dev;
	isomp->im_devvp = devvp;
	
	devvp->v_specflags |= SI_MOUNTEDON;
	
	/* Check the Rock Ridge Extention support */
	if (!(argp->flags & ISOFSMNT_NORRIP)) {
		if ((error = bread (isomp->im_devvp,
				   (isomp->root_extent + isonum_711(rootp->ext_attr_length))
				   * isomp->logical_block_size / DEV_BSIZE,
				   isomp->logical_block_size,NOCRED,&bp)))
		    goto out;
		
		rootp = (struct iso_directory_record *)bp->b_un.b_addr;
		
		if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
		    argp->flags	 |= ISOFSMNT_NORRIP;
		} else {
		    argp->flags	 &= ~ISOFSMNT_GENS;
		}
		
		/*
		 * The contents are valid,
		 * but they will get reread as part of another vnode, so...
		 */
		bp->b_flags |= B_AGE;
		brelse(bp);
		bp = NULL;
	}
	isomp->im_flags = argp->flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS|ISOFSMNT_EXTATT);

	if(high_sierra)
		/* this effectively ignores all the mount flags */
		isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
	else
		switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
		  default:
			  isomp->iso_ftype = ISO_FTYPE_DEFAULT;
			  break;
		  case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
			  isomp->iso_ftype = ISO_FTYPE_9660;
			  break;
		  case 0:
			  isomp->iso_ftype = ISO_FTYPE_RRIP;
			  break;
		}
	
	return 0;
out:
	if (bp)
		brelse(bp);
	if (needclose)
		(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
	if (isomp) {
		free((caddr_t)isomp, M_ISOFSMNT);
		mp->mnt_data = (qaddr_t)0;
	}
	return error;
}

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

/*
 * unmount system call
 */
int
cd9660_unmount(mp, mntflags, p)
	struct mount *mp;
	int mntflags;
	struct proc *p;
{
	register struct iso_mnt *isomp;
	int error, flags = 0;
	
	if (mntflags & MNT_FORCE) {
		if (!iso_doforce)
			return (EINVAL);
		flags |= FORCECLOSE;
	}
#if 0
	mntflushbuf(mp, 0);
	if (mntinvalbuf(mp))
		return EBUSY;
#endif
	if ((error = vflush(mp, NULLVP, flags)))
		return (error);

	isomp = VFSTOISOFS(mp);

#ifdef	ISODEVMAP
	if (isomp->iso_ftype == ISO_FTYPE_RRIP)
		iso_dunmap(isomp->im_dev);
#endif
	
	isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON;
	error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p);
	vrele(isomp->im_devvp);
	free((caddr_t)isomp, M_ISOFSMNT);
	mp->mnt_data = (qaddr_t)0;
	mp->mnt_flag &= ~MNT_LOCAL;
	return (error);
}

/*
 * Return root of a filesystem
 */
int
cd9660_root(mp, vpp)
	struct mount *mp;
	struct vnode **vpp;
{
	register struct iso_node *ip;
	struct iso_node tip, *nip;
	struct vnode tvp;
	int error;
	struct iso_mnt *imp = VFSTOISOFS (mp);
	struct iso_directory_record *dp;
	
	tvp.v_mount = mp;
	tvp.v_data = &tip;
	ip = VTOI(&tvp);
	ip->i_vnode = &tvp;
	ip->i_dev = imp->im_dev;
	ip->i_diroff = 0;
	dp = (struct iso_directory_record *)imp->root;
	isodirino(&ip->i_number,dp,imp);
	
	/*
	 * With RRIP we must use the `.' entry of the root directory.
	 * Simply tell iget, that it's a relocated directory.
	 */
	error = iso_iget(ip,ip->i_number,
			 imp->iso_ftype == ISO_FTYPE_RRIP,
			 &nip,dp);
	if (error)
		return error;
	*vpp = ITOV(nip);
	return 0;
}

/*
 * Do operations associated with quotas, not supported
 */
/* ARGSUSED */
int
cd9660_quotactl(mp, cmd, uid, arg, p)
	struct mount *mp;
	int cmd;
	uid_t uid;
	caddr_t arg;
	struct proc *p;
{

	return (EOPNOTSUPP);
}

/*
 * Get file system statistics.
 */
int
cd9660_statfs(mp, sbp, p)
	struct mount *mp;
	register struct statfs *sbp;
	struct proc *p;
{
	register struct iso_mnt *isomp;
	
	isomp = VFSTOISOFS(mp);
	
	sbp->f_type = MOUNT_CD9660;
	sbp->f_bsize = isomp->logical_block_size;
	sbp->f_iosize = sbp->f_bsize;	/* XXX */
	sbp->f_blocks = isomp->volume_space_size;
	sbp->f_bfree = 0; /* total free blocks */
	sbp->f_bavail = 0; /* blocks free for non superuser */
	sbp->f_files =	0; /* total files */
	sbp->f_ffree = 0; /* free file nodes */
	if (sbp != &mp->mnt_stat) {
		bcopy((caddr_t)mp->mnt_stat.f_mntonname,
			(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
		bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
			(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
	}
	/* Use the first spare for flags: */
	sbp->f_spare[0] = isomp->im_flags;
	return 0;
}

/* ARGSUSED */
int
cd9660_sync(mp, waitfor, cred, p)
	struct mount *mp;
	int waitfor;
	struct ucred *cred;
	struct proc *p;
{
	return (0);
}

/*
 * Flat namespace lookup.
 * Currently unsupported.
 */
/* ARGSUSED */
int
cd9660_vget(mp, ino, vpp)
	struct mount *mp;
	ino_t ino;
	struct vnode **vpp;
{

	return (EOPNOTSUPP);
}

/*
 * File handle to vnode
 *
 * Have to be really careful about stale file handles:
 * - check that the inode number is in range
 * - call iget() to get the locked inode
 * - check for an unallocated inode (i_mode == 0)
 * - check that the generation number matches
 */

struct ifid {
	ushort	ifid_len;
	ushort	ifid_pad;
	int	ifid_ino;
	long	ifid_start;
};

/* ARGSUSED */
int
cd9660_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
	register struct mount *mp;
	struct fid *fhp;
	struct mbuf *nam;
	struct vnode **vpp;
	int *exflagsp;
	struct ucred **credanonp;
{
	struct vnode			tvp;
	int				error;
	int				lbn, off;
	struct ifid			*ifhp;
	struct iso_mnt			*imp;
	struct buf			*bp;
	struct iso_directory_record	*dirp;
	struct iso_node			tip, *ip, *nip;
	struct netcred			*np;
	
	imp = VFSTOISOFS (mp);
	ifhp = (struct ifid *)fhp;
	
#ifdef	ISOFS_DBG
	printf("fhtovp: ino %d, start %ld\n",
	       ifhp->ifid_ino, ifhp->ifid_start);
#endif
	
	np = vfs_export_lookup(mp, &imp->im_export, nam);
	if (np == NULL)
		return (EACCES);

	lbn = iso_lblkno(imp, ifhp->ifid_ino);
	if (lbn >= imp->volume_space_size) {
		printf("fhtovp: lbn exceed volume space %d\n", lbn);
		return (ESTALE);
	}
	
	off = iso_blkoff(imp, ifhp->ifid_ino);
	if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
		printf("fhtovp: crosses block boundary %d\n",
		       off + ISO_DIRECTORY_RECORD_SIZE);
		return (ESTALE);
	}
	
	error = bread(imp->im_devvp, btodb(lbn * imp->logical_block_size),
		      imp->logical_block_size, NOCRED, &bp);
	if (error) {
		printf("fhtovp: bread error %d\n",error);
		brelse(bp);
		return (error);
	}
	
	dirp = (struct iso_directory_record *)(bp->b_un.b_addr + off);
	if (off + isonum_711(dirp->length) > imp->logical_block_size) {
		brelse(bp);
		printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
		       off+isonum_711(dirp->length), off,
		       isonum_711(dirp->length));
		return (ESTALE);
	}
	
	if (isonum_733(dirp->extent) + isonum_711(dirp->ext_attr_length) !=
	    ifhp->ifid_start) {
		brelse(bp);
		printf("fhtovp: file start miss %d vs %ld\n",
		       isonum_733(dirp->extent)+isonum_711(dirp->ext_attr_length),
		       ifhp->ifid_start);
		return (ESTALE);
	}
	brelse(bp);
	
	ip = &tip;
	tvp.v_mount = mp;
	tvp.v_data = ip;
	ip->i_vnode = &tvp;
	ip->i_dev = imp->im_dev;
	if ((error = iso_iget(ip, ifhp->ifid_ino, 0, &nip, dirp))) {
		*vpp = NULLVP;
		printf("fhtovp: failed to get inode\n");
		return (error);
	}
	ip = nip;
	/*
	 * XXX need generation number?
	 */
	if (ip->inode.iso_mode == 0) {
		iso_iput(ip);
		*vpp = NULLVP;
		printf("fhtovp: inode mode == 0\n");
		return (ESTALE);
	}
	*vpp = ITOV(ip);
	*exflagsp = np->netc_exflags;
	*credanonp = &np->netc_anon;
	return 0;
}

/*
 * Vnode pointer to File handle
 */
/* ARGSUSED */
int
cd9660_vptofh(vp, fhp)
	struct vnode *vp;
	struct fid *fhp;
{
	register struct iso_node *ip = VTOI(vp);
	register struct ifid *ifhp;
	
	ifhp = (struct ifid *)fhp;
	ifhp->ifid_len = sizeof(struct ifid);
	
	ifhp->ifid_ino = ip->i_number;
	ifhp->ifid_start = ip->iso_start;
	
#ifdef	ISOFS_DBG
	printf("vptofh: ino %d, start %ld\n",
	       ifhp->ifid_ino,ifhp->ifid_start);
#endif
	return 0;
}
OpenPOWER on IntegriCloud