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: releng/6.0/sys/fs/udf/udf_vfsops.c 150746 2005-09-30 06:26:42Z delphij $
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/proc.h>
88 #include <sys/queue.h>
89 #include <sys/vnode.h>
90 #include <sys/endian.h>
91
92 #include <geom/geom.h>
93 #include <geom/geom_vfs.h>
94
95 #include <vm/uma.h>
96
97 #include <fs/udf/ecma167-udf.h>
98 #include <fs/udf/osta.h>
99 #include <fs/udf/udf.h>
100 #include <fs/udf/udf_mount.h>
101
102 static MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure");
103 MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure");
104
105 struct iconv_functions *udf_iconv = NULL;
106
107 /* Zones */
108 uma_zone_t udf_zone_trans = NULL;
109 uma_zone_t udf_zone_node = NULL;
110 uma_zone_t udf_zone_ds = NULL;
111
112 static vfs_init_t udf_init;
113 static vfs_uninit_t udf_uninit;
114 static vfs_mount_t udf_mount;
115 static vfs_root_t udf_root;
116 static vfs_statfs_t udf_statfs;
117 static vfs_unmount_t udf_unmount;
118 static vfs_fhtovp_t udf_fhtovp;
119 static vfs_vptofh_t udf_vptofh;
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 .vfs_vptofh = udf_vptofh,
133 };
134 VFS_SET(udf_vfsops, udf, VFCF_READONLY);
135
136 MODULE_VERSION(udf, 1);
137
138 static int udf_mountfs(struct vnode *, struct mount *, struct thread *);
139
140 static int
141 udf_init(struct vfsconf *foo)
142 {
143
144 /*
145 * This code used to pre-allocate a certain number of pages for each
146 * pool, reducing the need to grow the zones later on. UMA doesn't
147 * advertise any such functionality, unfortunately =-<
148 */
149 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN *
150 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0);
151
152 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node),
153 NULL, NULL, NULL, NULL, 0, 0);
154
155 udf_zone_ds = uma_zcreate("UDF Dirstream zone",
156 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0);
157
158 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) ||
159 (udf_zone_ds == NULL)) {
160 printf("Cannot create allocation zones.\n");
161 return (ENOMEM);
162 }
163
164 return 0;
165 }
166
167 static int
168 udf_uninit(struct vfsconf *foo)
169 {
170
171 if (udf_zone_trans != NULL) {
172 uma_zdestroy(udf_zone_trans);
173 udf_zone_trans = NULL;
174 }
175
176 if (udf_zone_node != NULL) {
177 uma_zdestroy(udf_zone_node);
178 udf_zone_node = NULL;
179 }
180
181 if (udf_zone_ds != NULL) {
182 uma_zdestroy(udf_zone_ds);
183 udf_zone_ds = NULL;
184 }
185
186 return (0);
187 }
188
189 static int
190 udf_mount(struct mount *mp, struct thread *td)
191 {
192 struct vnode *devvp; /* vnode of the mount device */
193 struct udf_mnt *imp = 0;
194 struct export_args *export;
195 struct vfsoptlist *opts;
196 char *fspec, *cs_disk, *cs_local;
197 int error, len, *udf_flags;
198 struct nameidata nd, *ndp = &nd;
199
200 opts = mp->mnt_optnew;
201
202 if ((mp->mnt_flag & MNT_RDONLY) == 0)
203 return (EROFS);
204
205 /*
206 * No root filesystem support. Probably not a big deal, since the
207 * bootloader doesn't understand UDF.
208 */
209 if (mp->mnt_flag & MNT_ROOTFS)
210 return (ENOTSUP);
211
212 fspec = NULL;
213 error = vfs_getopt(opts, "from", (void **)&fspec, &len);
214 if (!error && fspec[len - 1] != '\0')
215 return (EINVAL);
216
217 if (mp->mnt_flag & MNT_UPDATE) {
218 imp = VFSTOUDFFS(mp);
219 if (fspec == NULL) {
220 error = vfs_getopt(opts, "export", (void **)&export,
221 &len);
222 if (error || len != sizeof(struct export_args))
223 return (EINVAL);
224 return (vfs_export(mp, export));
225 }
226 }
227
228 /* Check that the mount device exists */
229 if (fspec == NULL)
230 return (EINVAL);
231 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
232 if ((error = namei(ndp)))
233 return (error);
234 NDFREE(ndp, NDF_ONLY_PNBUF);
235 devvp = ndp->ni_vp;
236
237 if (vn_isdisk(devvp, &error) == 0) {
238 vput(devvp);
239 return (error);
240 }
241
242 /* Check the access rights on the mount device */
243 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td);
244 if (error)
245 error = suser(td);
246 if (error) {
247 vput(devvp);
248 return (error);
249 }
250
251 if ((error = udf_mountfs(devvp, mp, td))) {
252 vrele(devvp);
253 return (error);
254 }
255
256 imp = VFSTOUDFFS(mp);
257
258 udf_flags = NULL;
259 error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len);
260 if (error || len != sizeof(int))
261 return (EINVAL);
262 imp->im_flags = *udf_flags;
263
264 if (imp->im_flags & UDFMNT_KICONV && udf_iconv) {
265 cs_disk = NULL;
266 error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len);
267 if (!error && cs_disk[len - 1] != '\0')
268 return (EINVAL);
269 cs_local = NULL;
270 error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len);
271 if (!error && cs_local[len - 1] != '\0')
272 return (EINVAL);
273 udf_iconv->open(cs_local, cs_disk, &imp->im_d2l);
274 #if 0
275 udf_iconv->open(cs_disk, cs_local, &imp->im_l2d);
276 #endif
277 }
278
279 vfs_mountedfrom(mp, fspec);
280 return 0;
281 };
282
283 /*
284 * Check the descriptor tag for both the correct id and correct checksum.
285 * Return zero if all is good, EINVAL if not.
286 */
287 int
288 udf_checktag(struct desc_tag *tag, uint16_t id)
289 {
290 uint8_t *itag;
291 uint8_t i, cksum = 0;
292
293 itag = (uint8_t *)tag;
294
295 if (tag->id != id)
296 return (EINVAL);
297
298 for (i = 0; i < 15; i++)
299 cksum = cksum + itag[i];
300 cksum = cksum - itag[4];
301
302 if (cksum == tag->cksum)
303 return (0);
304
305 return (EINVAL);
306 }
307
308 static int
309 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) {
310 struct buf *bp = NULL;
311 struct anchor_vdp avdp;
312 struct udf_mnt *udfmp = NULL;
313 struct part_desc *pd;
314 struct logvol_desc *lvd;
315 struct fileset_desc *fsd;
316 struct file_entry *root_fentry;
317 uint32_t sector, size, mvds_start, mvds_end;
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 DROP_GIANT();
327 g_topology_lock();
328 error = g_vfs_open(devvp, &cp, "udf", 0);
329 g_topology_unlock();
330 PICKUP_GIANT();
331 VOP_UNLOCK(devvp, 0, td);
332 if (error)
333 return error;
334
335 bo = &devvp->v_bufobj;
336
337 /* XXX: should be M_WAITOK */
338 MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT,
339 M_NOWAIT | M_ZERO);
340 if (udfmp == NULL) {
341 printf("Cannot allocate UDF mount struct\n");
342 error = ENOMEM;
343 goto bail;
344 }
345
346 mp->mnt_data = (qaddr_t)udfmp;
347 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev);
348 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
349 mp->mnt_flag |= MNT_LOCAL;
350 udfmp->im_mountp = mp;
351 udfmp->im_dev = devvp->v_rdev;
352 udfmp->im_devvp = devvp;
353 udfmp->im_d2l = NULL;
354 udfmp->im_cp = cp;
355 udfmp->im_bo = bo;
356
357 #if 0
358 udfmp->im_l2d = NULL;
359 #endif
360
361 bsize = 2048; /* XXX Should probe the media for it's size */
362
363 /*
364 * Get the Anchor Volume Descriptor Pointer from sector 256.
365 * XXX Should also check sector n - 256, n, and 512.
366 */
367 sector = 256;
368 if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED,
369 &bp)) != 0)
370 goto bail;
371 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR)))
372 goto bail;
373
374 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp));
375 brelse(bp);
376 bp = NULL;
377
378 /*
379 * Extract the Partition Descriptor and Logical Volume Descriptor
380 * from the Volume Descriptor Sequence.
381 * XXX Should we care about the partition type right now?
382 * XXX What about multiple partitions?
383 */
384 mvds_start = le32toh(avdp.main_vds_ex.loc);
385 mvds_end = mvds_start + (le32toh(avdp.main_vds_ex.len) - 1) / bsize;
386 for (sector = mvds_start; sector < mvds_end; sector++) {
387 if ((error = bread(devvp, sector * btodb(bsize), bsize,
388 NOCRED, &bp)) != 0) {
389 printf("Can't read sector %d of VDS\n", sector);
390 goto bail;
391 }
392 lvd = (struct logvol_desc *)bp->b_data;
393 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) {
394 udfmp->bsize = le32toh(lvd->lb_size);
395 udfmp->bmask = udfmp->bsize - 1;
396 udfmp->bshift = ffs(udfmp->bsize) - 1;
397 fsd_part = le16toh(lvd->_lvd_use.fsd_loc.loc.part_num);
398 fsd_offset = le32toh(lvd->_lvd_use.fsd_loc.loc.lb_num);
399 if (udf_find_partmaps(udfmp, lvd))
400 break;
401 logvol_found = 1;
402 }
403 pd = (struct part_desc *)bp->b_data;
404 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) {
405 part_found = 1;
406 part_num = le16toh(pd->part_num);
407 udfmp->part_len = le32toh(pd->part_len);
408 udfmp->part_start = le32toh(pd->start_loc);
409 }
410
411 brelse(bp);
412 bp = NULL;
413 if ((part_found) && (logvol_found))
414 break;
415 }
416
417 if (!part_found || !logvol_found) {
418 error = EINVAL;
419 goto bail;
420 }
421
422 if (fsd_part != part_num) {
423 printf("FSD does not lie within the partition!\n");
424 error = EINVAL;
425 goto bail;
426 }
427
428
429 /*
430 * Grab the Fileset Descriptor
431 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing
432 * me in the right direction here.
433 */
434 sector = udfmp->part_start + fsd_offset;
435 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
436 printf("Cannot read sector %d of FSD\n", sector);
437 goto bail;
438 }
439 fsd = (struct fileset_desc *)bp->b_data;
440 if (!udf_checktag(&fsd->tag, TAGID_FSD)) {
441 fsd_found = 1;
442 bcopy(&fsd->rootdir_icb, &udfmp->root_icb,
443 sizeof(struct long_ad));
444 }
445
446 brelse(bp);
447 bp = NULL;
448
449 if (!fsd_found) {
450 printf("Couldn't find the fsd\n");
451 error = EINVAL;
452 goto bail;
453 }
454
455 /*
456 * Find the file entry for the root directory.
457 */
458 sector = le32toh(udfmp->root_icb.loc.lb_num) + udfmp->part_start;
459 size = le32toh(udfmp->root_icb.len);
460 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) {
461 printf("Cannot read sector %d\n", sector);
462 goto bail;
463 }
464
465 root_fentry = (struct file_entry *)bp->b_data;
466 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) {
467 printf("Invalid root file entry!\n");
468 goto bail;
469 }
470
471 brelse(bp);
472 bp = NULL;
473
474 return 0;
475
476 bail:
477 if (udfmp != NULL)
478 FREE(udfmp, M_UDFMOUNT);
479 if (bp != NULL)
480 brelse(bp);
481 DROP_GIANT();
482 g_topology_lock();
483 g_vfs_close(cp, td);
484 g_topology_unlock();
485 PICKUP_GIANT();
486 return error;
487 };
488
489 static int
490 udf_unmount(struct mount *mp, int mntflags, struct thread *td)
491 {
492 struct udf_mnt *udfmp;
493 int error, flags = 0;
494
495 udfmp = VFSTOUDFFS(mp);
496
497 if (mntflags & MNT_FORCE)
498 flags |= FORCECLOSE;
499
500 if ((error = vflush(mp, 0, flags, td)))
501 return (error);
502
503 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) {
504 if (udfmp->im_d2l)
505 udf_iconv->close(udfmp->im_d2l);
506 #if 0
507 if (udfmp->im_l2d)
508 udf_iconv->close(udfmp->im_l2d);
509 #endif
510 }
511
512 DROP_GIANT();
513 g_topology_lock();
514 g_vfs_close(udfmp->im_cp, td);
515 g_topology_unlock();
516 PICKUP_GIANT();
517 vrele(udfmp->im_devvp);
518
519 if (udfmp->s_table != NULL)
520 FREE(udfmp->s_table, M_UDFMOUNT);
521
522 FREE(udfmp, M_UDFMOUNT);
523
524 mp->mnt_data = (qaddr_t)0;
525 mp->mnt_flag &= ~MNT_LOCAL;
526
527 return (0);
528 }
529
530 static int
531 udf_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td)
532 {
533 struct udf_mnt *udfmp;
534 struct vnode *vp;
535 ino_t id;
536 int error;
537
538 udfmp = VFSTOUDFFS(mp);
539
540 id = udf_getid(&udfmp->root_icb);
541
542 error = udf_vget(mp, id, LK_EXCLUSIVE, vpp);
543 if (error)
544 return error;
545
546 vp = *vpp;
547 vp->v_vflag |= VV_ROOT;
548
549 return (0);
550 }
551
552 static int
553 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
554 {
555 struct udf_mnt *udfmp;
556
557 udfmp = VFSTOUDFFS(mp);
558
559 sbp->f_bsize = udfmp->bsize;
560 sbp->f_iosize = udfmp->bsize;
561 sbp->f_blocks = udfmp->part_len;
562 sbp->f_bfree = 0;
563 sbp->f_bavail = 0;
564 sbp->f_files = 0;
565 sbp->f_ffree = 0;
566 return 0;
567 }
568
569 int
570 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
571 {
572 struct buf *bp;
573 struct vnode *devvp;
574 struct udf_mnt *udfmp;
575 struct thread *td;
576 struct vnode *vp;
577 struct udf_node *unode;
578 struct file_entry *fe;
579 int error, sector, size;
580
581 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
582 if (error || *vpp != NULL)
583 return (error);
584
585 td = curthread;
586 udfmp = VFSTOUDFFS(mp);
587
588 unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO);
589
590 if ((error = udf_allocv(mp, &vp, td))) {
591 printf("Error from udf_allocv\n");
592 uma_zfree(udf_zone_node, unode);
593 return (error);
594 }
595
596 unode->i_vnode = vp;
597 unode->hash_id = ino;
598 unode->udfmp = udfmp;
599 vp->v_data = unode;
600
601 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL);
602 if (error || *vpp != NULL)
603 return (error);
604
605 /*
606 * Copy in the file entry. Per the spec, the size can only be 1 block.
607 */
608 sector = ino + udfmp->part_start;
609 devvp = udfmp->im_devvp;
610 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
611 printf("Cannot read sector %d\n", sector);
612 vput(vp);
613 brelse(bp);
614 *vpp = NULL;
615 return (error);
616 }
617
618 fe = (struct file_entry *)bp->b_data;
619 if (udf_checktag(&fe->tag, TAGID_FENTRY)) {
620 printf("Invalid file entry!\n");
621 vput(vp);
622 brelse(bp);
623 *vpp = NULL;
624 return (ENOMEM);
625 }
626 size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad);
627 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY,
628 M_NOWAIT | M_ZERO);
629 if (unode->fentry == NULL) {
630 printf("Cannot allocate file entry block\n");
631 vput(vp);
632 brelse(bp);
633 *vpp = NULL;
634 return (ENOMEM);
635 }
636
637 bcopy(bp->b_data, unode->fentry, size);
638
639 brelse(bp);
640 bp = NULL;
641
642 switch (unode->fentry->icbtag.file_type) {
643 default:
644 vp->v_type = VBAD;
645 break;
646 case 4:
647 vp->v_type = VDIR;
648 break;
649 case 5:
650 vp->v_type = VREG;
651 break;
652 case 6:
653 vp->v_type = VBLK;
654 break;
655 case 7:
656 vp->v_type = VCHR;
657 break;
658 case 9:
659 vp->v_type = VFIFO;
660 break;
661 case 10:
662 vp->v_type = VSOCK;
663 break;
664 case 12:
665 vp->v_type = VLNK;
666 break;
667 }
668 *vpp = vp;
669
670 return (0);
671 }
672
673 struct ifid {
674 u_short ifid_len;
675 u_short ifid_pad;
676 int ifid_ino;
677 long ifid_start;
678 };
679
680 static int
681 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
682 {
683 struct ifid *ifhp;
684 struct vnode *nvp;
685 int error;
686
687 ifhp = (struct ifid *)fhp;
688
689 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
690 *vpp = NULLVP;
691 return (error);
692 }
693
694 *vpp = nvp;
695 vnode_create_vobject(*vpp, 0, curthread);
696 return (0);
697 }
698
699 static int
700 udf_vptofh (struct vnode *vp, struct fid *fhp)
701 {
702 struct udf_node *node;
703 struct ifid *ifhp;
704
705 node = VTON(vp);
706 ifhp = (struct ifid *)fhp;
707 ifhp->ifid_len = sizeof(struct ifid);
708 ifhp->ifid_ino = node->hash_id;
709
710 return (0);
711 }
712
713 static int
714 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd)
715 {
716 union udf_pmap *pmap;
717 struct part_map_spare *pms;
718 struct regid *pmap_id;
719 struct buf *bp;
720 unsigned char regid_id[UDF_REGID_ID_SIZE + 1];
721 int i, ptype, psize, error;
722
723 for (i = 0; i < le32toh(lvd->n_pm); i++) {
724 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE];
725 ptype = pmap->data[0];
726 psize = pmap->data[1];
727 if (((ptype != 1) && (ptype != 2)) ||
728 ((psize != UDF_PMAP_SIZE) && (psize != 6))) {
729 printf("Invalid partition map found\n");
730 return (1);
731 }
732
733 if (ptype == 1) {
734 /* Type 1 map. We don't care */
735 continue;
736 }
737
738 /* Type 2 map. Gotta find out the details */
739 pmap_id = (struct regid *)&pmap->data[4];
740 bzero(®id_id[0], UDF_REGID_ID_SIZE);
741 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE);
742
743 if (bcmp(®id_id[0], "*UDF Sparable Partition",
744 UDF_REGID_ID_SIZE)) {
745 printf("Unsupported partition map: %s\n", ®id_id[0]);
746 return (1);
747 }
748
749 pms = &pmap->pms;
750 MALLOC(udfmp->s_table, struct udf_sparing_table *,
751 le32toh(pms->st_size), M_UDFMOUNT, M_NOWAIT | M_ZERO);
752 if (udfmp->s_table == NULL)
753 return (ENOMEM);
754
755 /* Calculate the number of sectors per packet. */
756 /* XXX Logical or physical? */
757 udfmp->p_sectors = le16toh(pms->packet_len) / udfmp->bsize;
758
759 /*
760 * XXX If reading the first Sparing Table fails, should look
761 * for another table.
762 */
763 if ((error = udf_readlblks(udfmp, le32toh(pms->st_loc[0]),
764 le32toh(pms->st_size), &bp)) != 0) {
765 if (bp != NULL)
766 brelse(bp);
767 printf("Failed to read Sparing Table at sector %d\n",
768 le32toh(pms->st_loc[0]));
769 return (error);
770 }
771 bcopy(bp->b_data, udfmp->s_table, le32toh(pms->st_size));
772 brelse(bp);
773
774 if (udf_checktag(&udfmp->s_table->tag, 0)) {
775 printf("Invalid sparing table found\n");
776 return (EINVAL);
777 }
778
779 /* See how many valid entries there are here. The list is
780 * supposed to be sorted. 0xfffffff0 and higher are not valid
781 */
782 for (i = 0; i < le16toh(udfmp->s_table->rt_l); i++) {
783 udfmp->s_table_entries = i;
784 if (le32toh(udfmp->s_table->entries[i].org) >=
785 0xfffffff0)
786 break;
787 }
788 }
789
790 return (0);
791 }
Cache object: 7206293ad4fadb514ea2f933bf7d9d93
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