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 */
40
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD: head/sys/fs/cd9660/cd9660_vfsops.c 116181 2003-06-11 00:34:37Z obrien $");
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/namei.h>
47#include <sys/proc.h>
48#include <sys/kernel.h>
49#include <sys/vnode.h>
50#include <sys/mount.h>
51#include <sys/bio.h>
52#include <sys/buf.h>
53#include <sys/cdio.h>
54#include <sys/conf.h>
55#include <sys/fcntl.h>
56#include <sys/malloc.h>
57#include <sys/stat.h>
58#include <sys/syslog.h>
59
60
61#include <isofs/cd9660/iso.h>
62#include <isofs/cd9660/iso_rrip.h>
63#include <isofs/cd9660/cd9660_node.h>
64#include <isofs/cd9660/cd9660_mount.h>
65
66MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
67MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
68
69static vfs_mount_t cd9660_mount;
70static vfs_unmount_t cd9660_unmount;
71static vfs_root_t cd9660_root;
72static vfs_statfs_t cd9660_statfs;
73static vfs_vget_t cd9660_vget;
74static vfs_fhtovp_t cd9660_fhtovp;
75static vfs_vptofh_t cd9660_vptofh;
76
77static struct vfsops cd9660_vfsops = {
78 cd9660_mount,
79 vfs_stdstart,
80 cd9660_unmount,
81 cd9660_root,
82 vfs_stdquotactl,
83 cd9660_statfs,
84 vfs_stdnosync,
85 cd9660_vget,
86 cd9660_fhtovp,
87 vfs_stdcheckexp,
88 cd9660_vptofh,
89 cd9660_init,
90 cd9660_uninit,
91 vfs_stdextattrctl,
92};
93VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
94MODULE_VERSION(cd9660, 1);
95
96
97/*
98 * Called by vfs_mountroot when iso is going to be mounted as root.
99 */
100
101static int iso_get_ssector(dev_t dev, struct thread *td);
102static int iso_mountfs(struct vnode *devvp, struct mount *mp,
103 struct thread *td, struct iso_args *argp);
104
105/*
106 * Try to find the start of the last data track on this CD-ROM. This
107 * is used to mount the last session of a multi-session CD. Bail out
108 * and return 0 if we fail, this is always a safe bet.
109 */
110static int
111iso_get_ssector(dev, td)
112 dev_t dev;
113 struct thread *td;
114{
115 struct ioc_toc_header h;
116 struct ioc_read_toc_single_entry t;
117 int i;
118 struct cdevsw *bd;
119 d_ioctl_t *ioctlp;
120
121 bd = devsw(dev);
122 ioctlp = bd->d_ioctl;
123 if (ioctlp == NULL)
124 return 0;
125
126 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
127 return 0;
128
129 for (i = h.ending_track; i >= 0; i--) {
130 t.address_format = CD_LBA_FORMAT;
131 t.track = i;
132 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0)
133 return 0;
134 if ((t.entry.control & 4) != 0)
135 /* found a data track */
136 break;
137 }
138
139 if (i < 0)
140 return 0;
141
142 return ntohl(t.entry.addr.lba);
143}
144
145static int iso_mountroot(struct mount *mp, struct thread *td);
146
147static int
148iso_mountroot(mp, td)
149 struct mount *mp;
150 struct thread *td;
151{
152 struct iso_args args;
153 int error;
154
155 if ((error = bdevvp(rootdev, &rootvp))) {
156 printf("iso_mountroot: can't find rootvp\n");
157 return (error);
158 }
159 args.flags = ISOFSMNT_ROOT;
160
161 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
162 error = VOP_OPEN(rootvp, FREAD, FSCRED, td);
163 VOP_UNLOCK(rootvp, 0, td);
164 if (error)
165 return error;
166
167 args.ssector = iso_get_ssector(rootdev, td);
168
169 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, td);
170
171 if (bootverbose)
172 printf("iso_mountroot(): using session at block %d\n",
173 args.ssector);
174 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
175 return (error);
176
177 (void)cd9660_statfs(mp, &mp->mnt_stat, td);
178 return (0);
179}
180
181/*
182 * VFS Operations.
183 *
184 * mount system call
185 */
186static int
187cd9660_mount(mp, path, data, ndp, td)
188 register struct mount *mp;
189 char *path;
190 caddr_t data;
191 struct nameidata *ndp;
192 struct thread *td;
193{
194 struct vnode *devvp;
195 struct iso_args args;
196 size_t size;
197 int error;
198 mode_t accessmode;
199 struct iso_mnt *imp = 0;
200
201 if (path == NULL) /* We are doing the initial root mount */
202 return (iso_mountroot(mp, td));
203 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
204 return (error);
205
206 if ((mp->mnt_flag & MNT_RDONLY) == 0)
207 return (EROFS);
208
209 /*
210 * If updating, check whether changing from read-only to
211 * read/write; if there is no device name, that's all we do.
212 */
213 if (mp->mnt_flag & MNT_UPDATE) {
214 imp = VFSTOISOFS(mp);
215 if (args.fspec == 0)
216 return (vfs_export(mp, &args.export));
217 }
218 /*
219 * Not an update, or updating the name: look up the name
220 * and verify that it refers to a sensible block device.
221 */
222 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td);
223 if ((error = namei(ndp)))
224 return (error);
225 NDFREE(ndp, NDF_ONLY_PNBUF);
226 devvp = ndp->ni_vp;
227
228 if (!vn_isdisk(devvp, &error)) {
229 vrele(devvp);
230 return (error);
231 }
232
233 /*
234 * Verify that user has necessary permissions on the device,
235 * or has superuser abilities
236 */
237 accessmode = VREAD;
238 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
239 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td);
240 if (error)
241 error = suser(td);
242 if (error) {
243 vput(devvp);
244 return (error);
245 }
246 VOP_UNLOCK(devvp, 0, td);
247
248 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
249 error = iso_mountfs(devvp, mp, td, &args);
250 } else {
251 if (devvp != imp->im_devvp)
252 error = EINVAL; /* needs translation */
253 else
254 vrele(devvp);
255 }
256 if (error) {
257 vrele(devvp);
258 return error;
259 }
260 imp = VFSTOISOFS(mp);
261 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
262 &size);
263 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
264 (void) cd9660_statfs(mp, &mp->mnt_stat, td);
265 return 0;
266}
267
268/*
269 * Common code for mount and mountroot
270 */
271static int
272iso_mountfs(devvp, mp, td, argp)
273 register struct vnode *devvp;
274 struct mount *mp;
275 struct thread *td;
276 struct iso_args *argp;
277{
278 register struct iso_mnt *isomp = (struct iso_mnt *)0;
279 struct buf *bp = NULL;
280 struct buf *pribp = NULL, *supbp = NULL;
281 dev_t dev = devvp->v_rdev;
282 int error = EINVAL;
283 int needclose = 0;
284 int high_sierra = 0;
285 int iso_bsize;
286 int iso_blknum;
287 int joliet_level;
288 struct iso_volume_descriptor *vdp = 0;
289 struct iso_primary_descriptor *pri = NULL;
290 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
291 struct iso_supplementary_descriptor *sup = NULL;
292 struct iso_directory_record *rootp;
293 int logical_block_size;
294
295 if (!(mp->mnt_flag & MNT_RDONLY))
296 return EROFS;
297
298 /*
299 * Disallow multiple mounts of the same device.
300 * Disallow mounting of a device that is currently in use
301 * (except for root, which might share swap device for miniroot).
302 * Flush out any old buffers remaining from a previous use.
303 */
304 if ((error = vfs_mountedon(devvp)))
305 return error;
306 if (vcount(devvp) > 1 && devvp != rootvp)
307 return EBUSY;
308 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0)))
309 return (error);
310
311 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
312 error = VOP_OPEN(devvp, FREAD, FSCRED, td);
313 VOP_UNLOCK(devvp, 0, td);
314 if (error)
315 return error;
316 if (devvp->v_rdev->si_iosize_max != 0)
317 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
318 if (mp->mnt_iosize_max > MAXPHYS)
319 mp->mnt_iosize_max = MAXPHYS;
320
321 needclose = 1;
322
323 /* This is the "logical sector size". The standard says this
324 * should be 2048 or the physical sector size on the device,
325 * whichever is greater. For now, we'll just use a constant.
326 */
327 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
328
329 joliet_level = 0;
330 for (iso_blknum = 16 + argp->ssector;
331 iso_blknum < 100 + argp->ssector;
332 iso_blknum++) {
333 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
334 iso_bsize, NOCRED, &bp)) != 0)
335 goto out;
336
337 vdp = (struct iso_volume_descriptor *)bp->b_data;
338 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
339 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
340 sizeof vdp->id) != 0) {
341 error = EINVAL;
342 goto out;
343 } else
344 high_sierra = 1;
345 }
346 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
347 case ISO_VD_PRIMARY:
348 if (pribp == NULL) {
349 pribp = bp;
350 bp = NULL;
351 pri = (struct iso_primary_descriptor *)vdp;
352 pri_sierra =
353 (struct iso_sierra_primary_descriptor *)vdp;
354 }
355 break;
356
357 case ISO_VD_SUPPLEMENTARY:
358 if (supbp == NULL) {
359 supbp = bp;
360 bp = NULL;
361 sup = (struct iso_supplementary_descriptor *)vdp;
362
363 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
364 if (bcmp(sup->escape, "%/@", 3) == 0)
365 joliet_level = 1;
366 if (bcmp(sup->escape, "%/C", 3) == 0)
367 joliet_level = 2;
368 if (bcmp(sup->escape, "%/E", 3) == 0)
369 joliet_level = 3;
370
371 if ((isonum_711 (sup->flags) & 1) &&
372 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
373 joliet_level = 0;
374 }
375 }
376 break;
377
378 case ISO_VD_END:
379 goto vd_end;
380
381 default:
382 break;
383 }
384 if (bp) {
385 brelse(bp);
386 bp = NULL;
387 }
388 }
389 vd_end:
390 if (bp) {
391 brelse(bp);
392 bp = NULL;
393 }
394
395 if (pri == NULL) {
396 error = EINVAL;
397 goto out;
398 }
399
400 logical_block_size =
401 isonum_723 (high_sierra?
402 pri_sierra->logical_block_size:
403 pri->logical_block_size);
404
405 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
406 || (logical_block_size & (logical_block_size - 1)) != 0) {
407 error = EINVAL;
408 goto out;
409 }
410
411 rootp = (struct iso_directory_record *)
412 (high_sierra?
413 pri_sierra->root_directory_record:
414 pri->root_directory_record);
415
416 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
417 isomp->logical_block_size = logical_block_size;
418 isomp->volume_space_size =
419 isonum_733 (high_sierra?
420 pri_sierra->volume_space_size:
421 pri->volume_space_size);
422 isomp->joliet_level = 0;
423 /*
424 * Since an ISO9660 multi-session CD can also access previous
425 * sessions, we have to include them into the space consider-
426 * ations. This doesn't yield a very accurate number since
427 * parts of the old sessions might be inaccessible now, but we
428 * can't do much better. This is also important for the NFS
429 * filehandle validation.
430 */
431 isomp->volume_space_size += argp->ssector;
432 bcopy (rootp, isomp->root, sizeof isomp->root);
433 isomp->root_extent = isonum_733 (rootp->extent);
434 isomp->root_size = isonum_733 (rootp->size);
435
436 isomp->im_bmask = logical_block_size - 1;
437 isomp->im_bshift = ffs(logical_block_size) - 1;
438
439 pribp->b_flags |= B_AGE;
440 brelse(pribp);
441 pribp = NULL;
442
443 mp->mnt_data = (qaddr_t)isomp;
444 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
445 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
446 mp->mnt_maxsymlinklen = 0;
447 mp->mnt_flag |= MNT_LOCAL;
448 isomp->im_mountp = mp;
449 isomp->im_dev = dev;
450 isomp->im_devvp = devvp;
451
452 devvp->v_rdev->si_mountpoint = mp;
453
454 /* Check the Rock Ridge Extention support */
455 if (!(argp->flags & ISOFSMNT_NORRIP)) {
456 if ((error = bread(isomp->im_devvp,
457 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
458 (isomp->im_bshift - DEV_BSHIFT),
459 isomp->logical_block_size, NOCRED, &bp)) != 0)
460 goto out;
461
462 rootp = (struct iso_directory_record *)bp->b_data;
463
464 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
465 argp->flags |= ISOFSMNT_NORRIP;
466 } else {
467 argp->flags &= ~ISOFSMNT_GENS;
468 }
469
470 /*
471 * The contents are valid,
472 * but they will get reread as part of another vnode, so...
473 */
474 bp->b_flags |= B_AGE;
475 brelse(bp);
476 bp = NULL;
477 }
478 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
479 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
480
481 if (high_sierra) {
482 /* this effectively ignores all the mount flags */
483 log(LOG_INFO, "cd9660: High Sierra Format\n");
484 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
485 } else
486 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
487 default:
488 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
489 break;
490 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
491 isomp->iso_ftype = ISO_FTYPE_9660;
492 break;
493 case 0:
494 log(LOG_INFO, "cd9660: RockRidge Extension\n");
495 isomp->iso_ftype = ISO_FTYPE_RRIP;
496 break;
497 }
498
499 /* Decide whether to use the Joliet descriptor */
500
501 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
502 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
503 rootp = (struct iso_directory_record *)
504 sup->root_directory_record;
505 bcopy (rootp, isomp->root, sizeof isomp->root);
506 isomp->root_extent = isonum_733 (rootp->extent);
507 isomp->root_size = isonum_733 (rootp->size);
508 isomp->joliet_level = joliet_level;
509 supbp->b_flags |= B_AGE;
510 }
511
512 if (supbp) {
513 brelse(supbp);
514 supbp = NULL;
515 }
516
517 return 0;
518out:
519 devvp->v_rdev->si_mountpoint = NULL;
520 if (bp)
521 brelse(bp);
522 if (pribp)
523 brelse(pribp);
524 if (supbp)
525 brelse(supbp);
526 if (needclose)
527 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td);
528 if (isomp) {
529 free((caddr_t)isomp, M_ISOFSMNT);
530 mp->mnt_data = (qaddr_t)0;
531 }
532 return error;
533}
534
535/*
536 * unmount system call
537 */
538static int
539cd9660_unmount(mp, mntflags, td)
540 struct mount *mp;
541 int mntflags;
542 struct thread *td;
543{
544 register struct iso_mnt *isomp;
545 int error, flags = 0;
546
547 if (mntflags & MNT_FORCE)
548 flags |= FORCECLOSE;
549#if 0
550 mntflushbuf(mp, 0);
551 if (mntinvalbuf(mp))
552 return EBUSY;
553#endif
554 if ((error = vflush(mp, 0, flags)))
555 return (error);
556
557 isomp = VFSTOISOFS(mp);
558
559 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
560 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td);
561 vrele(isomp->im_devvp);
562 free((caddr_t)isomp, M_ISOFSMNT);
563 mp->mnt_data = (qaddr_t)0;
564 mp->mnt_flag &= ~MNT_LOCAL;
565 return (error);
566}
567
568/*
569 * Return root of a filesystem
570 */
571static int
572cd9660_root(mp, vpp)
573 struct mount *mp;
574 struct vnode **vpp;
575{
576 struct iso_mnt *imp = VFSTOISOFS(mp);
577 struct iso_directory_record *dp =
578 (struct iso_directory_record *)imp->root;
579 ino_t ino = isodirino(dp, imp);
580
581 /*
582 * With RRIP we must use the `.' entry of the root directory.
583 * Simply tell vget, that it's a relocated directory.
584 */
585 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp,
586 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
587}
588
589/*
590 * Get filesystem statistics.
591 */
592static int
593cd9660_statfs(mp, sbp, td)
594 struct mount *mp;
595 register struct statfs *sbp;
596 struct thread *td;
597{
598 register struct iso_mnt *isomp;
599
600 isomp = VFSTOISOFS(mp);
601
602 sbp->f_bsize = isomp->logical_block_size;
603 sbp->f_iosize = sbp->f_bsize; /* XXX */
604 sbp->f_blocks = isomp->volume_space_size;
605 sbp->f_bfree = 0; /* total free blocks */
606 sbp->f_bavail = 0; /* blocks free for non superuser */
607 sbp->f_files = 0; /* total files */
608 sbp->f_ffree = 0; /* free file nodes */
609 if (sbp != &mp->mnt_stat) {
610 sbp->f_type = mp->mnt_vfc->vfc_typenum;
611 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
612 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
613 }
614 return 0;
615}
616
617/*
618 * File handle to vnode
619 *
620 * Have to be really careful about stale file handles:
621 * - check that the inode number is in range
622 * - call iget() to get the locked inode
623 * - check for an unallocated inode (i_mode == 0)
624 * - check that the generation number matches
625 */
626
627struct ifid {
628 ushort ifid_len;
629 ushort ifid_pad;
630 int ifid_ino;
631 long ifid_start;
632};
633
634/* ARGSUSED */
635static int
636cd9660_fhtovp(mp, fhp, vpp)
637 register struct mount *mp;
638 struct fid *fhp;
639 struct vnode **vpp;
640{
641 struct ifid *ifhp = (struct ifid *)fhp;
642 register struct iso_node *ip;
643 struct vnode *nvp;
644 int error;
645
646#ifdef ISOFS_DBG
647 printf("fhtovp: ino %d, start %ld\n",
648 ifhp->ifid_ino, ifhp->ifid_start);
649#endif
650
651 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
652 *vpp = NULLVP;
653 return (error);
654 }
655 ip = VTOI(nvp);
656 if (ip->inode.iso_mode == 0) {
657 vput(nvp);
658 *vpp = NULLVP;
659 return (ESTALE);
660 }
661 *vpp = nvp;
662 return (0);
663}
664
665static int
666cd9660_vget(mp, ino, flags, vpp)
667 struct mount *mp;
668 ino_t ino;
669 int flags;
670 struct vnode **vpp;
671{
672
673 /*
674 * XXXX
675 * It would be nice if we didn't always set the `relocated' flag
676 * and force the extra read, but I don't want to think about fixing
677 * that right now.
678 */
679 return (cd9660_vget_internal(mp, ino, flags, vpp,
680#if 0
681 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
682#else
683 0,
684#endif
685 (struct iso_directory_record *)0));
686}
687
688int
689cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
690 struct mount *mp;
691 ino_t ino;
692 int flags;
693 struct vnode **vpp;
694 int relocated;
695 struct iso_directory_record *isodir;
696{
697 struct iso_mnt *imp;
698 struct iso_node *ip;
699 struct buf *bp;
700 struct vnode *vp;
701 dev_t dev;
702 int error;
703
704 imp = VFSTOISOFS(mp);
705 dev = imp->im_dev;
706 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0)
707 return (error);
708 if (*vpp != NULL)
709 return (0);
710
711 /* Allocate a new vnode/iso_node. */
712 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) {
713 *vpp = NULLVP;
714 return (error);
715 }
716 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
717 M_WAITOK | M_ZERO);
718 vp->v_data = ip;
719 ip->i_vnode = vp;
720 ip->i_dev = dev;
721 ip->i_number = ino;
722
723 /*
724 * Check to be sure that it did not show up. We have to put it
725 * on the hash chain as the cleanup from vput expects to find
726 * it there.
727 */
728 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 ||
729 *vpp != NULL) {
730 cd9660_ihashins(ip);
731 vput(vp);
732 return (error);
733 }
734
735 /*
736 * Put it onto its hash chain and lock it so that other requests for
737 * this inode will block if they arrive while we are sleeping waiting
738 * for old data structures to be purged or for the contents of the
739 * disk portion of this inode to be read.
740 */
741 cd9660_ihashins(ip);
742
743 if (isodir == 0) {
744 int lbn, off;
745
746 lbn = lblkno(imp, ino);
747 if (lbn >= imp->volume_space_size) {
748 vput(vp);
749 printf("fhtovp: lbn exceed volume space %d\n", lbn);
750 return (ESTALE);
751 }
752
753 off = blkoff(imp, ino);
754 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
755 vput(vp);
756 printf("fhtovp: crosses block boundary %d\n",
757 off + ISO_DIRECTORY_RECORD_SIZE);
758 return (ESTALE);
759 }
760
761 error = bread(imp->im_devvp,
762 lbn << (imp->im_bshift - DEV_BSHIFT),
763 imp->logical_block_size, NOCRED, &bp);
764 if (error) {
765 vput(vp);
766 brelse(bp);
767 printf("fhtovp: bread error %d\n",error);
768 return (error);
769 }
770 isodir = (struct iso_directory_record *)(bp->b_data + off);
771
772 if (off + isonum_711(isodir->length) >
773 imp->logical_block_size) {
774 vput(vp);
775 if (bp != 0)
776 brelse(bp);
777 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
778 off +isonum_711(isodir->length), off,
779 isonum_711(isodir->length));
780 return (ESTALE);
781 }
782
783#if 0
784 if (isonum_733(isodir->extent) +
785 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
786 if (bp != 0)
787 brelse(bp);
788 printf("fhtovp: file start miss %d vs %d\n",
789 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
790 ifhp->ifid_start);
791 return (ESTALE);
792 }
793#endif
794 } else
795 bp = 0;
796
797 ip->i_mnt = imp;
798 ip->i_devvp = imp->im_devvp;
799 VREF(ip->i_devvp);
800
801 if (relocated) {
802 /*
803 * On relocated directories we must
804 * read the `.' entry out of a dir.
805 */
806 ip->iso_start = ino >> imp->im_bshift;
807 if (bp != 0)
808 brelse(bp);
809 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
810 vput(vp);
811 return (error);
812 }
813 isodir = (struct iso_directory_record *)bp->b_data;
814 }
815
816 ip->iso_extent = isonum_733(isodir->extent);
817 ip->i_size = isonum_733(isodir->size);
818 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
819
820 /*
821 * Setup time stamp, attribute
822 */
823 vp->v_type = VNON;
824 switch (imp->iso_ftype) {
825 default: /* ISO_FTYPE_9660 */
826 {
827 struct buf *bp2;
828 int off;
829 if ((imp->im_flags & ISOFSMNT_EXTATT)
830 && (off = isonum_711(isodir->ext_attr_length)))
831 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
832 &bp2);
833 else
834 bp2 = NULL;
835 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
836 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
837 if (bp2)
838 brelse(bp2);
839 break;
840 }
841 case ISO_FTYPE_RRIP:
842 cd9660_rrip_analyze(isodir, ip, imp);
843 break;
844 }
845
846 if (bp != 0)
847 brelse(bp);
848
849 /*
850 * Initialize the associated vnode
851 */
852 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
853 case VFIFO:
854 vp->v_op = cd9660_fifoop_p;
855 break;
856 case VCHR:
857 case VBLK:
858 vp->v_op = cd9660_specop_p;
859 vp = addaliasu(vp, ip->inode.iso_rdev);
860 ip->i_vnode = vp;
861 break;
862 default:
863 break;
864 }
865
866 if (ip->iso_extent == imp->root_extent)
867 vp->v_vflag |= VV_ROOT;
868
869 /*
870 * XXX need generation number?
871 */
872
873 *vpp = vp;
874 return (0);
875}
876
877/*
878 * Vnode pointer to File handle
879 */
880/* ARGSUSED */
881static int
882cd9660_vptofh(vp, fhp)
883 struct vnode *vp;
884 struct fid *fhp;
885{
886 register struct iso_node *ip = VTOI(vp);
887 register struct ifid *ifhp;
888
889 ifhp = (struct ifid *)fhp;
890 ifhp->ifid_len = sizeof(struct ifid);
891
892 ifhp->ifid_ino = ip->i_number;
893 ifhp->ifid_start = ip->iso_start;
894
895#ifdef ISOFS_DBG
896 printf("vptofh: ino %d, start %ld\n",
897 ifhp->ifid_ino,ifhp->ifid_start);
898#endif
899 return 0;
900}