1 /*-
2 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29 /* udf_vfsops.c */
30 /* Implement the VFS side of things */
31
32 /*
33 * Ok, here's how it goes. The UDF specs are pretty clear on how each data
34 * structure is made up, but not very clear on how they relate to each other.
35 * Here is the skinny... This demostrates a filesystem with one file in the
36 * root directory. Subdirectories are treated just as normal files, but they
37 * have File Id Descriptors of their children as their file data. As for the
38 * Anchor Volume Descriptor Pointer, it can exist in two of the following three
39 * places: sector 256, sector n (the max sector of the disk), or sector
40 * n - 256. It's a pretty good bet that one will exist at sector 256 though.
41 * One caveat is unclosed CD media. For that, sector 256 cannot be written,
42 * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the
43 * media is closed.
44 *
45 * Sector:
46 * 256:
47 * n: Anchor Volume Descriptor Pointer
48 * n - 256: |
49 * |
50 * |-->Main Volume Descriptor Sequence
51 * | |
52 * | |
53 * | |-->Logical Volume Descriptor
54 * | |
55 * |-->Partition Descriptor |
56 * | |
57 * | |
58 * |-->Fileset Descriptor
59 * |
60 * |
61 * |-->Root Dir File Entry
62 * |
63 * |
64 * |-->File data:
65 * File Id Descriptor
66 * |
67 * |
68 * |-->File Entry
69 * |
70 * |
71 * |-->File data
72 */
73 #include <sys/types.h>
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/uio.h>
77 #include <sys/bio.h>
78 #include <sys/buf.h>
79 #include <sys/conf.h>
80 #include <sys/dirent.h>
81 #include <sys/fcntl.h>
82 #include <sys/iconv.h>
83 #include <sys/kernel.h>
84 #include <sys/malloc.h>
85 #include <sys/mount.h>
86 #include <sys/namei.h>
87 #include <sys/priv.h>
88 #include <sys/proc.h>
89 #include <sys/queue.h>
90 #include <sys/vnode.h>
91 #include <sys/endian.h>
92
93 #include <geom/geom.h>
94 #include <geom/geom_vfs.h>
95
96 #include <vm/uma.h>
97
98 #include <fs/udf/ecma167-udf.h>
99 #include <fs/udf/osta.h>
100 #include <fs/udf/udf.h>
101 #include <fs/udf/udf_mount.h>
102
103 static MALLOC_DEFINE(M_UDFMOUNT, "udf_mount", "UDF mount structure");
104 MALLOC_DEFINE(M_UDFFENTRY, "udf_fentry", "UDF file entry structure");
105
106 struct iconv_functions *udf_iconv = NULL;
107
108 /* Zones */
109 uma_zone_t udf_zone_trans = NULL;
110 uma_zone_t udf_zone_node = NULL;
111 uma_zone_t udf_zone_ds = NULL;
112
113 static vfs_init_t udf_init;
114 static vfs_uninit_t udf_uninit;
115 static vfs_mount_t udf_mount;
116 static vfs_root_t udf_root;
117 static vfs_statfs_t udf_statfs;
118 static vfs_unmount_t udf_unmount;
119 static vfs_fhtovp_t udf_fhtovp;
120
121 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *);
122
123 static struct vfsops udf_vfsops = {
124 .vfs_fhtovp = udf_fhtovp,
125 .vfs_init = udf_init,
126 .vfs_mount = udf_mount,
127 .vfs_root = udf_root,
128 .vfs_statfs = udf_statfs,
129 .vfs_uninit = udf_uninit,
130 .vfs_unmount = udf_unmount,
131 .vfs_vget = udf_vget,
132 };
133 VFS_SET(udf_vfsops, udf, VFCF_READONLY);
134
135 MODULE_VERSION(udf, 1);
136
137 static int udf_mountfs(struct vnode *, struct mount *);
138
139 static int
udf_init(struct vfsconf * foo)140 udf_init(struct vfsconf *foo)
141 {
142
143 /*
144 * This code used to pre-allocate a certain number of pages for each
145 * pool, reducing the need to grow the zones later on. UMA doesn't
146 * advertise any such functionality, unfortunately =-<
147 */
148 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN *
149 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0);
150
151 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node),
152 NULL, NULL, NULL, NULL, 0, 0);
153
154 udf_zone_ds = uma_zcreate("UDF Dirstream zone",
155 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0);
156
157 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) ||
158 (udf_zone_ds == NULL)) {
159 printf("Cannot create allocation zones.\n");
160 return (ENOMEM);
161 }
162
163 return 0;
164 }
165
166 static int
udf_uninit(struct vfsconf * foo)167 udf_uninit(struct vfsconf *foo)
168 {
169
170 if (udf_zone_trans != NULL) {
171 uma_zdestroy(udf_zone_trans);
172 udf_zone_trans = NULL;
173 }
174
175 if (udf_zone_node != NULL) {
176 uma_zdestroy(udf_zone_node);
177 udf_zone_node = NULL;
178 }
179
180 if (udf_zone_ds != NULL) {
181 uma_zdestroy(udf_zone_ds);
182 udf_zone_ds = NULL;
183 }
184
185 return (0);
186 }
187
188 static int
udf_mount(struct mount * mp)189 udf_mount(struct mount *mp)
190 {
191 struct vnode *devvp; /* vnode of the mount device */
192 struct thread *td;
193 struct udf_mnt *imp = NULL;
194 struct vfsoptlist *opts;
195 char *fspec, *cs_disk, *cs_local;
196 int error, len, *udf_flags;
197 struct nameidata nd, *ndp = &nd;
198
199 td = curthread;
200 opts = mp->mnt_optnew;
201
202 /*
203 * Unconditionally mount as read-only.
204 */
205 MNT_ILOCK(mp);
206 mp->mnt_flag |= MNT_RDONLY;
207 MNT_IUNLOCK(mp);
208
209 /*
210 * No root filesystem support. Probably not a big deal, since the
211 * bootloader doesn't understand UDF.
212 */
213 if (mp->mnt_flag & MNT_ROOTFS)
214 return (ENOTSUP);
215
216 fspec = NULL;
217 error = vfs_getopt(opts, "from", (void **)&fspec, &len);
218 if (!error && fspec[len - 1] != '\0')
219 return (EINVAL);
220
221 if (mp->mnt_flag & MNT_UPDATE) {
222 return (0);
223 }
224
225 /* Check that the mount device exists */
226 if (fspec == NULL)
227 return (EINVAL);
228 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
229 if ((error = namei(ndp)))
230 return (error);
231 NDFREE(ndp, NDF_ONLY_PNBUF);
232 devvp = ndp->ni_vp;
233
234 if (vn_isdisk(devvp, &error) == 0) {
235 vput(devvp);
236 return (error);
237 }
238
239 /* Check the access rights on the mount device */
240 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td);
241 if (error)
242 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
243 if (error) {
244 vput(devvp);
245 return (error);
246 }
247
248 if ((error = udf_mountfs(devvp, mp))) {
249 vrele(devvp);
250 return (error);
251 }
252
253 imp = VFSTOUDFFS(mp);
254
255 udf_flags = NULL;
256 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len);
257 if (error || len != sizeof(int))
258 return (EINVAL);
259 imp->im_flags = *udf_flags;
260
261 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) {
262 cs_disk = NULL;
263 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len);
264 if (!error && cs_disk[len - 1] != '\0')
265 return (EINVAL);
266 cs_local = NULL;
267 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len);
268 if (!error && cs_local[len - 1] != '\0')
269 return (EINVAL);
270 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l);
271 #if 0
272 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d);
273 #endif
274 }
275
276 vfs_mountedfrom(mp, fspec);
277 return 0;
278 };
279
280 /*
281 * Check the descriptor tag for both the correct id and correct checksum.
282 * Return zero if all is good, EINVAL if not.
283 */
284 int
udf_checktag(struct desc_tag * tag,uint16_t id)285 udf_checktag(struct desc_tag *tag, uint16_t id)
286 {
287 uint8_t *itag;
288 uint8_t i, cksum = 0;
289
290 itag = (uint8_t *)tag;
291
292 if (le16toh(tag->id) != id)
293 return (EINVAL);
294
295 for (i = 0; i < 16; i++)
296 cksum = cksum + itag[i];
297 cksum = cksum - itag[4];
298
299 if (cksum == tag->cksum)
300 return (0);
301
302 return (EINVAL);
303 }
304
305 static int
udf_mountfs(struct vnode * devvp,struct mount * mp)306 udf_mountfs(struct vnode *devvp, struct mount *mp)
307 {
308 struct buf *bp = NULL;
309 struct cdev *dev;
310 struct anchor_vdp avdp;
311 struct udf_mnt *udfmp = NULL;
312 struct part_desc *pd;
313 struct logvol_desc *lvd;
314 struct fileset_desc *fsd;
315 struct file_entry *root_fentry;
316 uint32_t sector, size, mvds_start, mvds_end;
317 uint32_t logical_secsize;
318 uint32_t fsd_offset = 0;
319 uint16_t part_num = 0, fsd_part = 0;
320 int error = EINVAL;
321 int logvol_found = 0, part_found = 0, fsd_found = 0;
322 int bsize;
323 struct g_consumer *cp;
324 struct bufobj *bo;
325
326 dev = devvp->v_rdev;
327 dev_ref(dev);
328 g_topology_lock();
329 error = g_vfs_open(devvp, &cp, "udf", 0);
330 g_topology_unlock();
331 VOP_UNLOCK(devvp, 0);
332 if (error)
333 goto bail;
334
335 bo = &devvp->v_bufobj;
336
337 if (devvp->v_rdev->si_iosize_max != 0)
338 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
339 if (mp->mnt_iosize_max > MAXPHYS)
340 mp->mnt_iosize_max = MAXPHYS;
341
342 /* XXX: should be M_WAITOK */
343 udfmp = malloc(sizeof(struct udf_mnt), M_UDFMOUNT,
344 M_NOWAIT | M_ZERO);
345 if (udfmp == NULL) {
346 printf("Cannot allocate UDF mount struct\n");
347 error = ENOMEM;
348 goto bail;
349 }
350
351 mp->mnt_data = udfmp;
352 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev);
353 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
354 MNT_ILOCK(mp);
355 mp->mnt_flag |= MNT_LOCAL;
356 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED;
357 MNT_IUNLOCK(mp);
358 udfmp->im_mountp = mp;
359 udfmp->im_dev = dev;
360 udfmp->im_devvp = devvp;
361 udfmp->im_d2l = NULL;
362 udfmp->im_cp = cp;
363 udfmp->im_bo = bo;
364
365 #if 0
366 udfmp->im_l2d = NULL;
367 #endif
368 /*
369 * The UDF specification defines a logical sectorsize of 2048
370 * for DVD media.
371 */
372 logical_secsize = 2048;
373
374 if (((logical_secsize % cp->provider->sectorsize) != 0) ||
375 (logical_secsize < cp->provider->sectorsize)) {
376 error = EINVAL;
377 goto bail;
378 }
379
380 bsize = cp->provider->sectorsize;
381
382 /*
383 * Get the Anchor Volume Descriptor Pointer from sector 256.
384 * XXX Should also check sector n - 256, n, and 512.
385 */
386 sector = 256;
387 if ((error = bread(devvp, sector * btodb(logical_secsize), bsize,
388 NOCRED, &bp)) != 0)
389 goto bail;
390 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR)))
391 goto bail;
392
393 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp));
394 brelse(bp);
395 bp = NULL;
396
397 /*
398 * Extract the Partition Descriptor and Logical Volume Descriptor
399 * from the Volume Descriptor Sequence.
400 * XXX Should we care about the partition type right now?
401 * XXX What about multiple partitions?
402 */
403 mvds_start = le32toh(avdp.main_vds_ex.loc);
404 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize;
405 for (sector = mvds_start; sector < mvds_end; sector++) {
406 if ((error = bread(devvp, sector * btodb(logical_secsize),
407 bsize, NOCRED, &bp)) != 0) {
408 printf("Can't read sector %d of VDS\n", sector);
409 goto bail;
410 }
411 lvd = (struct logvol_desc *)bp->b_data;
412 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) {
413 udfmp->bsize = le32toh(lvd->lb_size);
414 udfmp->bmask = udfmp->bsize - 1;
415 udfmp->bshift = ffs(udfmp->bsize) - 1;
416 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num);
417 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num);
418 if (udf_find_partmaps(udfmp, lvd))
419 break;
420 logvol_found = 1;
421 }
422 pd = (struct part_desc *)bp->b_data;
423 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) {
424 part_found = 1;
425 part_num = le16toh(pd->part_num);
426 udfmp->part_len = le32toh(pd->part_len);
427 udfmp->part_start = le32toh(pd->start_loc);
428 }
429
430 brelse(bp);
431 bp = NULL;
432 if ((part_found) && (logvol_found))
433 break;
434 }
435
436 if (!part_found || !logvol_found) {
437 error = EINVAL;
438 goto bail;
439 }
440
441 if (fsd_part != part_num) {
442 printf("FSD does not lie within the partition!\n");
443 error = EINVAL;
444 goto bail;
445 }
446
447
448 /*
449 * Grab the Fileset Descriptor
450 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing
451 * me in the right direction here.
452 */
453 sector = udfmp->part_start + fsd_offset;
454 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
455 printf("Cannot read sector %d of FSD\n", sector);
456 goto bail;
457 }
458 fsd = (struct fileset_desc *)bp->b_data;
459 if (!udf_checktag(&fsd->tag, TAGID_FSD)) {
460 fsd_found = 1;
461 bcopy(&fsd->rootdir_icb, &udfmp->root_icb,
462 sizeof(struct long_ad));
463 }
464
465 brelse(bp);
466 bp = NULL;
467
468 if (!fsd_found) {
469 printf("Couldn't find the fsd\n");
470 error = EINVAL;
471 goto bail;
472 }
473
474 /*
475 * Find the file entry for the root directory.
476 */
477 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start;
478 size = le32toh(udfmp->root_icb.len);
479 if ((error = udf_readdevblks(udfmp, sector, size, &bp)) != 0) {
480 printf("Cannot read sector %d\n", sector);
481 goto bail;
482 }
483
484 root_fentry = (struct file_entry *)bp->b_data;
485 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) {
486 printf("Invalid root file entry!\n");
487 goto bail;
488 }
489
490 brelse(bp);
491 bp = NULL;
492
493 return 0;
494
495 bail:
496 if (udfmp != NULL)
497 free(udfmp, M_UDFMOUNT);
498 if (bp != NULL)
499 brelse(bp);
500 if (cp != NULL) {
501 g_topology_lock();
502 g_vfs_close(cp);
503 g_topology_unlock();
504 }
505 dev_rel(dev);
506 return error;
507 };
508
509 static int
udf_unmount(struct mount * mp,int mntflags)510 udf_unmount(struct mount *mp, int mntflags)
511 {
512 struct udf_mnt *udfmp;
513 int error, flags = 0;
514
515 udfmp = VFSTOUDFFS(mp);
516
517 if (mntflags & MNT_FORCE)
518 flags |= FORCECLOSE;
519
520 if ((error = vflush(mp, 0, flags, curthread)))
521 return (error);
522
523 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) {
524 if (udfmp->im_d2l)
525 udf_iconv->close(udfmp->im_d2l);
526 #if 0
527 if (udfmp->im_l2d)
528 udf_iconv->close(udfmp->im_l2d);
529 #endif
530 }
531
532 g_topology_lock();
533 g_vfs_close(udfmp->im_cp);
534 g_topology_unlock();
535 vrele(udfmp->im_devvp);
536 dev_rel(udfmp->im_dev);
537
538 if (udfmp->s_table != NULL)
539 free(udfmp->s_table, M_UDFMOUNT);
540
541 free(udfmp, M_UDFMOUNT);
542
543 mp->mnt_data = NULL;
544 MNT_ILOCK(mp);
545 mp->mnt_flag &= ~MNT_LOCAL;
546 MNT_IUNLOCK(mp);
547
548 return (0);
549 }
550
551 static int
udf_root(struct mount * mp,int flags,struct vnode ** vpp)552 udf_root(struct mount *mp, int flags, struct vnode **vpp)
553 {
554 struct udf_mnt *udfmp;
555 ino_t id;
556
557 udfmp = VFSTOUDFFS(mp);
558
559 id = udf_getid(&udfmp->root_icb);
560
561 return (udf_vget(mp, id, flags, vpp));
562 }
563
564 static int
udf_statfs(struct mount * mp,struct statfs * sbp)565 udf_statfs(struct mount *mp, struct statfs *sbp)
566 {
567 struct udf_mnt *udfmp;
568
569 udfmp = VFSTOUDFFS(mp);
570
571 sbp->f_bsize = udfmp->bsize;
572 sbp->f_iosize = udfmp->bsize;
573 sbp->f_blocks = udfmp->part_len;
574 sbp->f_bfree = 0;
575 sbp->f_bavail = 0;
576 sbp->f_files = 0;
577 sbp->f_ffree = 0;
578 return 0;
579 }
580
581 int
udf_vget(struct mount * mp,ino_t ino,int flags,struct vnode ** vpp)582 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
583 {
584 struct buf *bp;
585 struct vnode *devvp;
586 struct udf_mnt *udfmp;
587 struct thread *td;
588 struct vnode *vp;
589 struct udf_node *unode;
590 struct file_entry *fe;
591 uint32_t lea, lad;
592 int error, sector, size;
593
594 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
595 if (error || *vpp != NULL)
596 return (error);
597
598 /*
599 * We must promote to an exclusive lock for vnode creation. This
600 * can happen if lookup is passed LOCKSHARED.
601 */
602 if ((flags & LK_TYPE_MASK) == LK_SHARED) {
603 flags &= ~LK_TYPE_MASK;
604 flags |= LK_EXCLUSIVE;
605 }
606
607 /*
608 * We do not lock vnode creation as it is believed to be too
609 * expensive for such rare case as simultaneous creation of vnode
610 * for same ino by different processes. We just allow them to race
611 * and check later to decide who wins. Let the race begin!
612 */
613
614 td = curthread;
615 udfmp = VFSTOUDFFS(mp);
616
617 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO);
618
619 if ((error = udf_allocv(mp, &vp, td))) {
620 printf("Error from udf_allocv\n");
621 uma_zfree(udf_zone_node, unode);
622 return (error);
623 }
624
625 unode->i_vnode = vp;
626 unode->hash_id = ino;
627 unode->udfmp = udfmp;
628 vp->v_data = unode;
629
630 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
631 error = insmntque(vp, mp);
632 if (error != 0) {
633 uma_zfree(udf_zone_node, unode);
634 return (error);
635 }
636 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL);
637 if (error || *vpp != NULL)
638 return (error);
639
640 /*
641 * Copy in the file entry. Per the spec, the size can only be 1 block.
642 */
643 sector = ino + udfmp->part_start;
644 devvp = udfmp->im_devvp;
645 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
646 printf("Cannot read sector %d\n", sector);
647 goto error;
648 }
649
650 /*
651 * File entry length validation.
652 */
653 fe = (struct file_entry *)bp->b_data;
654 if (udf_checktag(&fe->tag, TAGID_FENTRY)) {
655 printf("Invalid file entry!\n");
656 error = ENOMEM;
657 goto error;
658 }
659 lea = le32toh(fe->l_ea);
660 lad = le32toh(fe->l_ad);
661 if (lea > udfmp->bsize || lad > udfmp->bsize) {
662 printf("Invalid EA and AD lengths %u, %u\n", lea, lad);
663 error = EIO;
664 goto error;
665 }
666 size = UDF_FENTRY_SIZE + lea + lad;
667 if (size > udfmp->bsize) {
668 printf("Invalid file entry size %u\n", size);
669 error = EIO;
670 goto error;
671 }
672
673 unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO);
674 if (unode->fentry == NULL) {
675 printf("Cannot allocate file entry block\n");
676 error = ENOMEM;
677 goto error;
678 }
679
680 bcopy(bp->b_data, unode->fentry, size);
681
682 brelse(bp);
683 bp = NULL;
684
685 switch (unode->fentry->icbtag.file_type) {
686 default:
687 vp->v_type = VBAD;
688 break;
689 case 4:
690 vp->v_type = VDIR;
691 break;
692 case 5:
693 vp->v_type = VREG;
694 break;
695 case 6:
696 vp->v_type = VBLK;
697 break;
698 case 7:
699 vp->v_type = VCHR;
700 break;
701 case 9:
702 vp->v_type = VFIFO;
703 vp->v_op = &udf_fifoops;
704 break;
705 case 10:
706 vp->v_type = VSOCK;
707 break;
708 case 12:
709 vp->v_type = VLNK;
710 break;
711 }
712
713 if (vp->v_type != VFIFO)
714 VN_LOCK_ASHARE(vp);
715
716 if (ino == udf_getid(&udfmp->root_icb))
717 vp->v_vflag |= VV_ROOT;
718
719 *vpp = vp;
720
721 return (0);
722
723 error:
724 vgone(vp);
725 vput(vp);
726 brelse(bp);
727 *vpp = NULL;
728 return (error);
729 }
730
731 static int
udf_fhtovp(struct mount * mp,struct fid * fhp,int flags,struct vnode ** vpp)732 udf_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp)
733 {
734 struct ifid *ifhp;
735 struct vnode *nvp;
736 struct udf_node *np;
737 off_t fsize;
738 int error;
739
740 ifhp = (struct ifid *)fhp;
741
742 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
743 *vpp = NULLVP;
744 return (error);
745 }
746
747 np = VTON(nvp);
748 fsize = le64toh(np->fentry->inf_len);
749
750 *vpp = nvp;
751 vnode_create_vobject(*vpp, fsize, curthread);
752 return (0);
753 }
754
755 static int
udf_find_partmaps(struct udf_mnt * udfmp,struct logvol_desc * lvd)756 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd)
757 {
758 struct part_map_spare *pms;
759 struct regid *pmap_id;
760 struct buf *bp;
761 unsigned char regid_id[UDF_REGID_ID_SIZE + 1];
762 int i, k, ptype, psize, error;
763 uint8_t *pmap = (uint8_t *) &lvd->maps[0];
764
765 for (i = 0; i < le32toh(lvd->n_pm); i++) {
766 ptype = pmap[0];
767 psize = pmap[1];
768 if (((ptype != 1) && (ptype != 2)) ||
769 ((psize != UDF_PMAP_TYPE1_SIZE) &&
770 (psize != UDF_PMAP_TYPE2_SIZE))) {
771 printf("Invalid partition map found\n");
772 return (1);
773 }
774
775 if (ptype == 1) {
776 /* Type 1 map. We don't care */
777 pmap += UDF_PMAP_TYPE1_SIZE;
778 continue;
779 }
780
781 /* Type 2 map. Gotta find out the details */
782 pmap_id = (struct regid *)&pmap[4];
783 bzero(®id_id[0], UDF_REGID_ID_SIZE);
784 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE);
785
786 if (bcmp(®id_id[0], "*UDF Sparable Partition",
787 UDF_REGID_ID_SIZE)) {
788 printf("Unsupported partition map: %s\n", ®id_id[0]);
789 return (1);
790 }
791
792 pms = (struct part_map_spare *)pmap;
793 pmap += UDF_PMAP_TYPE2_SIZE;
794 udfmp->s_table = malloc(le32toh(pms->st_size),
795 M_UDFMOUNT, M_NOWAIT | M_ZERO);
796 if (udfmp->s_table == NULL)
797 return (ENOMEM);
798
799 /* Calculate the number of sectors per packet. */
800 /* XXX Logical or physical? */
801 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize;
802
803 /*
804 * XXX If reading the first Sparing Table fails, should look
805 * for another table.
806 */
807 if ((error = udf_readdevblks(udfmp, le32toh(pms->st_loc[0]),
808 le32toh(pms->st_size), &bp)) != 0) {
809 if (bp != NULL)
810 brelse(bp);
811 printf("Failed to read Sparing Table at sector %d\n",
812 le32toh(pms->st_loc[0]));
813 free(udfmp->s_table, M_UDFMOUNT);
814 return (error);
815 }
816 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size));
817 brelse(bp);
818
819 if (udf_checktag(&udfmp->s_table->tag, 0)) {
820 printf("Invalid sparing table found\n");
821 free(udfmp->s_table, M_UDFMOUNT);
822 return (EINVAL);
823 }
824
825 /* See how many valid entries there are here. The list is
826 * supposed to be sorted. 0xfffffff0 and higher are not valid
827 */
828 for (k = 0; k < le16toh(udfmp->s_table->rt_l); k++) {
829 udfmp->s_table_entries = k;
830 if (le32toh(udfmp->s_table->entries[k].org) >=
831 0xfffffff0)
832 break;
833 }
834 }
835
836 return (0);
837 }
838