Device layer rollup commit.
[dragonfly.git] / sys / vfs / udf / udf_vfsops.c
CommitLineData
03998195
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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: src/sys/fs/udf/udf_vfsops.c,v 1.16 2003/11/05 06:56:08 scottl Exp $
e4c9c0c8 27 * $DragonFly: src/sys/vfs/udf/udf_vfsops.c,v 1.5 2004/05/19 22:53:06 dillon Exp $
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28 */
29
30/* udf_vfsops.c */
31/* Implement the VFS side of things */
32
33/*
34 * Ok, here's how it goes. The UDF specs are pretty clear on how each data
35 * structure is made up, but not very clear on how they relate to each other.
36 * Here is the skinny... This demostrates a filesystem with one file in the
37 * root directory. Subdirectories are treated just as normal files, but they
38 * have File Id Descriptors of their children as their file data. As for the
39 * Anchor Volume Descriptor Pointer, it can exist in two of the following three
40 * places: sector 256, sector n (the max sector of the disk), or sector
41 * n - 256. It's a pretty good bet that one will exist at sector 256 though.
42 * One caveat is unclosed CD media. For that, sector 256 cannot be written,
43 * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the
44 * media is closed.
45 *
46 * Sector:
47 * 256:
48 * n: Anchor Volume Descriptor Pointer
49 * n - 256: |
50 * |
51 * |-->Main Volume Descriptor Sequence
52 * | |
53 * | |
54 * | |-->Logical Volume Descriptor
55 * | |
56 * |-->Partition Descriptor |
57 * | |
58 * | |
59 * |-->Fileset Descriptor
60 * |
61 * |
62 * |-->Root Dir File Entry
63 * |
64 * |
65 * |-->File data:
66 * File Id Descriptor
67 * |
68 * |
69 * |-->File Entry
70 * |
71 * |
72 * |-->File data
73 */
74
75#include <sys/types.h>
76#include <sys/param.h>
77#include <sys/systm.h>
78#include <sys/uio.h>
79#include <sys/buf.h>
80#include <sys/conf.h>
81#include <sys/dirent.h>
82#include <sys/fcntl.h>
83#include <sys/module.h>
84#include <sys/kernel.h>
85#include <sys/malloc.h>
86#include <sys/mount.h>
87#include <sys/namei.h>
88#include <sys/proc.h>
89#include <sys/queue.h>
90#include <sys/vnode.h>
91
92#include <vfs/udf/ecma167-udf.h>
93#include <vfs/udf/osta.h>
94#include <vfs/udf/udf.h>
95#include <vfs/udf/udf_mount.h>
96
97MALLOC_DEFINE(M_UDFNODE, "UDF node", "UDF node structure");
98MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure");
99MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure");
100
101static int udf_mount(struct mount *, char *, caddr_t, struct nameidata *,
102 struct thread *);
103static int udf_unmount(struct mount *, int, struct thread *);
104static int udf_root(struct mount *, struct vnode **);
105static int udf_statfs(struct mount *, struct statfs *, struct thread *);
106static int udf_fhtovp(struct mount *, struct fid *, struct vnode **);
107static int udf_vptofh(struct vnode *, struct fid *);
108
109static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *);
110
111static struct vfsops udf_vfsops = {
112 udf_mount,
113 vfs_stdstart,
114 udf_unmount,
115 udf_root,
116 vfs_stdquotactl,
117 udf_statfs,
118 vfs_stdsync,
119 udf_vget,
120 udf_fhtovp,
121 vfs_stdcheckexp,
122 udf_vptofh,
123 vfs_stdinit,
124 vfs_stduninit,
125 vfs_stdextattrctl,
126};
127VFS_SET(udf_vfsops, udf, VFCF_READONLY);
128
129MODULE_VERSION(udf, 1);
130
131static int udf_mountfs(struct vnode *, struct mount *, struct thread *);
132
133static int
134udf_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp,
135 struct thread *td)
136{
137 struct vnode *devvp; /* vnode of the mount device */
138 struct udf_args args;
139 struct udf_mnt *imp = 0;
140 size_t size;
141 int error;
142
143 if ((mp->mnt_flag & MNT_RDONLY) == 0)
144 return (EROFS);
145
146 /*
147 * No root filesystem support. Probably not a big deal, since the
148 * bootloader doesn't understand UDF.
149 */
150 if (mp->mnt_flag & MNT_ROOTFS)
151 return (ENOTSUP);
152
153 if ((error = copyin(data, (caddr_t)&args, sizeof(struct udf_args))))
154 return(error);
155
156 if (mp->mnt_flag & MNT_UPDATE) {
157 imp = VFSTOUDFFS(mp);
158 if (args.fspec == NULL)
159 return(vfs_export(mp, &imp->im_export, &args.export));
160 }
161
162 /* Check that the mount device exists */
163 NDINIT(ndp, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, args.fspec, td);
164 if ((error = namei(ndp)))
165 return(error);
166 NDFREE(ndp, NDF_ONLY_PNBUF);
167 devvp = ndp->ni_vp;
168
169 if (vn_isdisk(devvp, &error) == 0) {
170 vrele(devvp);
171 return(error);
172 }
173
174 /* Check the access rights on the mount device */
175 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
176 error = VOP_ACCESS(devvp, VREAD, td->td_proc->p_ucred, td);
177 if (error)
178 error = suser(td);
179 if (error) {
180 vput(devvp);
181 return(error);
182 }
183 VOP_UNLOCK(devvp, NULL, 0, td);
184
185 if ((error = udf_mountfs(devvp, mp, td))) {
186 vrele(devvp);
187 return(error);
188 }
189
190 imp = VFSTOUDFFS(mp);
191
192 imp->im_flags = args.flags;
193
194 copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
195 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
196 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
197 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
198 udf_statfs(mp, &mp->mnt_stat, td);
199 return(0);
4a77c3ab 200}
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201
202/*
203 * Check the descriptor tag for both the correct id and correct checksum.
204 * Return zero if all is good, EINVAL if not.
205 */
206int
207udf_checktag(struct desc_tag *tag, uint16_t id)
208{
209 uint8_t *itag;
210 uint8_t i, cksum = 0;
211
212 itag = (uint8_t *)tag;
213
214 if (tag->id != id)
215 return(EINVAL);
216
217 for (i = 0; i < 15; i++)
218 cksum = cksum + itag[i];
219 cksum = cksum - itag[4];
220
221 if (cksum == tag->cksum)
222 return(0);
223
224 return(EINVAL);
225}
226
227static int
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228udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td)
229{
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230 struct buf *bp = NULL;
231 struct anchor_vdp avdp;
232 struct udf_mnt *udfmp = NULL;
233 struct part_desc *pd;
234 struct logvol_desc *lvd;
235 struct fileset_desc *fsd;
236 struct file_entry *root_fentry;
e4c9c0c8 237 dev_t dev;
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238 uint32_t sector, size, mvds_start, mvds_end;
239 uint32_t fsd_offset = 0;
240 uint16_t part_num = 0, fsd_part = 0;
241 int error = EINVAL, needclose = 0;
242 int logvol_found = 0, part_found = 0, fsd_found = 0;
243 int bsize;
244
245 /*
246 * Disallow multiple mounts of the same device. Flush the buffer
247 * cache for the device.
248 */
249 if ((error = vfs_mountedon(devvp)))
250 return(error);
e4c9c0c8 251 if (count_udev(devvp) > 0)
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252 return(EBUSY);
253 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0)))
254 return(error);
255
256 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
257 error = VOP_OPEN(devvp, FREAD, FSCRED, td);
258 VOP_UNLOCK(devvp, NULL, 0, td);
259 if (error)
260 return(error);
261 needclose = 1;
e4c9c0c8 262 dev = devvp->v_rdev;
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263
264 udfmp = malloc(sizeof(*udfmp), M_UDFMOUNT, M_WAITOK | M_ZERO);
265
266 mp->mnt_data = (qaddr_t)udfmp;
e4c9c0c8 267 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
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268 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
269 mp->mnt_maxsymlinklen = 0;
270 mp->mnt_flag |= MNT_LOCAL;
271 udfmp->im_mountp = mp;
e4c9c0c8 272 udfmp->im_dev = dev;
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273 udfmp->im_devvp = devvp;
274
275 bsize = 2048; /* XXX Should probe the media for it's size */
276
277 /*
278 * Get the Anchor Volume Descriptor Pointer from sector 256.
279 * XXX Should also check sector n - 256, n, and 512.
280 */
281 sector = 256;
282 if ((error = bread(devvp, sector * btodb(bsize), bsize, &bp)) != 0)
283 goto bail;
284 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR)))
285 goto bail;
286
287 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp));
288 brelse(bp);
289 bp = NULL;
290
291 /*
292 * Extract the Partition Descriptor and Logical Volume Descriptor
293 * from the Volume Descriptor Sequence.
294 * XXX Should we care about the partition type right now?
295 * XXX What about multiple partitions?
296 */
297 mvds_start = avdp.main_vds_ex.loc;
298 mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize;
299 for (sector = mvds_start; sector < mvds_end; sector++) {
300 if ((error = bread(devvp, sector * btodb(bsize), bsize,
301 &bp)) != 0) {
302 printf("Can't read sector %d of VDS\n", sector);
303 goto bail;
304 }
305 lvd = (struct logvol_desc *)bp->b_data;
306 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) {
307 udfmp->bsize = lvd->lb_size;
308 udfmp->bmask = udfmp->bsize - 1;
309 udfmp->bshift = ffs(udfmp->bsize) - 1;
310 fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num;
311 fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num;
312 if (udf_find_partmaps(udfmp, lvd))
313 break;
314 logvol_found = 1;
315 }
316 pd = (struct part_desc *)bp->b_data;
317 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) {
318 part_found = 1;
319 part_num = pd->part_num;
320 udfmp->part_len = pd->part_len;
321 udfmp->part_start = pd->start_loc;
322 }
323
324 brelse(bp);
325 bp = NULL;
326 if ((part_found) && (logvol_found))
327 break;
328 }
329
330 if (!part_found || !logvol_found) {
331 error = EINVAL;
332 goto bail;
333 }
334
335 if (fsd_part != part_num) {
336 printf("FSD does not lie within the partition!\n");
337 error = EINVAL;
338 goto bail;
339 }
340
341
342 /*
343 * Grab the Fileset Descriptor
344 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing
345 * me in the right direction here.
346 */
347 sector = udfmp->part_start + fsd_offset;
348 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
349 printf("Cannot read sector %d of FSD\n", sector);
350 goto bail;
351 }
352 fsd = (struct fileset_desc *)bp->b_data;
353 if (!udf_checktag(&fsd->tag, TAGID_FSD)) {
354 fsd_found = 1;
355 bcopy(&fsd->rootdir_icb, &udfmp->root_icb,
356 sizeof(struct long_ad));
357 }
358
359 brelse(bp);
360 bp = NULL;
361
362 if (!fsd_found) {
363 printf("Couldn't find the fsd\n");
364 error = EINVAL;
365 goto bail;
366 }
367
368 /*
369 * Find the file entry for the root directory.
370 */
371 sector = udfmp->root_icb.loc.lb_num + udfmp->part_start;
372 size = udfmp->root_icb.len;
373 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) {
374 printf("Cannot read sector %d\n", sector);
375 goto bail;
376 }
377
378 root_fentry = (struct file_entry *)bp->b_data;
379 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) {
380 printf("Invalid root file entry!\n");
381 goto bail;
382 }
383
384 brelse(bp);
385 bp = NULL;
386
387 lwkt_token_init(&udfmp->hash_token);
388 udfmp->hashtbl = phashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, &udfmp->hashsz);
389
390 return(0);
391
392bail:
393 if (udfmp != NULL)
394 free(udfmp, M_UDFMOUNT);
395 if (bp != NULL)
396 brelse(bp);
397 if (needclose)
398 VOP_CLOSE(devvp, FREAD, td);
399 return(error);
4a77c3ab 400}
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401
402static int
403udf_unmount(struct mount *mp, int mntflags, struct thread *td)
404{
405 struct udf_mnt *udfmp;
406 int error, flags = 0;
407
408 udfmp = VFSTOUDFFS(mp);
409
410 if (mntflags & MNT_FORCE)
411 flags |= FORCECLOSE;
412
413 if ((error = vflush(mp, 0, flags)))
414 return (error);
415
e4c9c0c8 416 udfmp->im_devvp->v_rdev->si_mountpoint = NULL;
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417 error = VOP_CLOSE(udfmp->im_devvp, FREAD, td);
418 vrele(udfmp->im_devvp);
419
420 if (udfmp->s_table)
421 free(udfmp->s_table, M_UDFMOUNT);
422 if (udfmp->hashtbl)
423 free(udfmp->hashtbl, M_UDFMOUNT);
424 free(udfmp, M_UDFMOUNT);
425
426 mp->mnt_data = (qaddr_t)0;
427 mp->mnt_flag &= ~MNT_LOCAL;
428
429 return (error);
430}
431
432static int
433udf_root(struct mount *mp, struct vnode **vpp)
434{
435 struct udf_mnt *udfmp;
436 struct vnode *vp;
437 ino_t id;
438 int error;
439
440 udfmp = VFSTOUDFFS(mp);
441
442 id = udf_getid(&udfmp->root_icb);
443
444 error = udf_vget(mp, id, vpp);
445 if (error)
446 return(error);
447
448 vp = *vpp;
449 vp->v_flag |= VROOT;
450 udfmp->root_vp = vp;
451
452 return(0);
453}
454
455static int
456udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
457{
458 struct udf_mnt *udfmp;
459
460 udfmp = VFSTOUDFFS(mp);
461
462 sbp->f_bsize = udfmp->bsize;
463 sbp->f_iosize = udfmp->bsize;
464 sbp->f_blocks = udfmp->part_len;
465 sbp->f_bfree = 0;
466 sbp->f_bavail = 0;
467 sbp->f_files = 0;
468 sbp->f_ffree = 0;
469 if (sbp != &mp->mnt_stat) {
470 sbp->f_type = mp->mnt_vfc->vfc_typenum;
471 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
472 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
473 }
474
475 return(0);
476}
477
478int
479udf_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
480{
481 struct buf *bp;
482 struct vnode *devvp;
483 struct udf_mnt *udfmp;
484 struct thread *td;
485 struct vnode *vp;
486 struct udf_node *unode;
487 struct file_entry *fe;
488 int error, sector, size;
489
490 td = curthread;
491 udfmp = VFSTOUDFFS(mp);
492
493 /* See if we already have this in the cache */
494 if ((error = udf_hashlookup(udfmp, ino, vpp)) != 0)
495 return(error);
496 if (*vpp != NULL) {
497 return(0);
498 }
499
500 /*
501 * Allocate memory and check the tag id's before grabbing a new
502 * vnode, since it's hard to roll back if there is a problem.
503 */
504 unode = malloc(sizeof(*unode), M_UDFNODE, M_WAITOK | M_ZERO);
505
506 /*
507 * Copy in the file entry. Per the spec, the size can only be 1 block.
508 */
509 sector = ino + udfmp->part_start;
510 devvp = udfmp->im_devvp;
511 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
512 printf("Cannot read sector %d\n", sector);
513 free(unode, M_UDFNODE);
514 return(error);
515 }
516
517 fe = (struct file_entry *)bp->b_data;
518 if (udf_checktag(&fe->tag, TAGID_FENTRY)) {
519 printf("Invalid file entry!\n");
520 free(unode, M_UDFNODE);
521 brelse(bp);
522 return(ENOMEM);
523 }
524 size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad;
525 unode->fentry = malloc(size, M_UDFFENTRY, M_WAITOK | M_ZERO);
526
527 bcopy(bp->b_data, unode->fentry, size);
528
529 brelse(bp);
530 bp = NULL;
531
532 if ((error = udf_allocv(mp, &vp))) {
533 printf("Error from udf_allocv\n");
534 free(unode, M_UDFNODE);
535 return(error);
536 }
537
538 unode->i_vnode = vp;
539 unode->hash_id = ino;
540 unode->i_devvp = udfmp->im_devvp;
541 unode->i_dev = udfmp->im_dev;
542 unode->udfmp = udfmp;
543 vp->v_data = unode;
597aea93 544 vref(udfmp->im_devvp);
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545 udf_hashins(unode);
546
547 switch (unode->fentry->icbtag.file_type) {
548 default:
549 vp->v_type = VBAD;
550 break;
551 case 4:
552 vp->v_type = VDIR;
553 break;
554 case 5:
555 vp->v_type = VREG;
556 break;
557 case 6:
558 vp->v_type = VBLK;
559 break;
560 case 7:
561 vp->v_type = VCHR;
562 break;
563 case 9:
564 vp->v_type = VFIFO;
565 break;
566 case 10:
567 vp->v_type = VSOCK;
568 break;
569 case 12:
570 vp->v_type = VLNK;
571 break;
572 }
573 *vpp = vp;
574
575 return(0);
576}
577
578struct ifid {
579 u_short ifid_len;
580 u_short ifid_pad;
581 int ifid_ino;
582 long ifid_start;
583};
584
585static int
586udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
587{
588 struct ifid *ifhp;
589 struct vnode *nvp;
590 int error;
591
592 ifhp = (struct ifid *)fhp;
593
594 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
595 *vpp = NULLVP;
596 return(error);
597 }
598
599 *vpp = nvp;
600 return(0);
601}
602
603static int
604udf_vptofh (struct vnode *vp, struct fid *fhp)
605{
606 struct udf_node *node;
607 struct ifid *ifhp;
608
609 node = VTON(vp);
610 ifhp = (struct ifid *)fhp;
611 ifhp->ifid_len = sizeof(struct ifid);
612 ifhp->ifid_ino = node->hash_id;
613
614 return(0);
615}
616
617static int
618udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd)
619{
620 union udf_pmap *pmap;
621 struct part_map_spare *pms;
622 struct regid *pmap_id;
623 struct buf *bp;
624 unsigned char regid_id[UDF_REGID_ID_SIZE + 1];
625 int ptype, psize, error;
626 unsigned int i;
627
628 for (i = 0; i < lvd->n_pm; i++) {
629 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE];
630 ptype = pmap->data[0];
631 psize = pmap->data[1];
632 if (((ptype != 1) && (ptype != 2)) ||
633 ((psize != UDF_PMAP_SIZE) && (psize != 6))) {
634 printf("Invalid partition map found\n");
635 return(1);
636 }
637
638 if (ptype == 1) {
639 /* Type 1 map. We don't care */
640 continue;
641 }
642
643 /* Type 2 map. Gotta find out the details */
644 pmap_id = (struct regid *)&pmap->data[4];
645 bzero(&regid_id[0], UDF_REGID_ID_SIZE);
646 bcopy(&pmap_id->id[0], &regid_id[0], UDF_REGID_ID_SIZE);
647
648 if (bcmp(&regid_id[0], "*UDF Sparable Partition",
649 UDF_REGID_ID_SIZE)) {
650 printf("Unsupported partition map: %s\n", &regid_id[0]);
651 return(1);
652 }
653
654 pms = &pmap->pms;
655 udfmp->s_table = malloc(pms->st_size, M_UDFMOUNT,
656 M_WAITOK | M_ZERO);
657 if (udfmp->s_table == NULL)
658 return(ENOMEM);
659
660 /* Calculate the number of sectors per packet. */
661 /* XXX Logical or physical? */
662 udfmp->p_sectors = pms->packet_len / udfmp->bsize;
663
664 /*
665 * XXX If reading the first Sparing Table fails, should look
666 * for another table.
667 */
668 if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size,
669 &bp)) != 0) {
ffaa7d78
MD
670 if (bp)
671 brelse(bp);
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672 printf("Failed to read Sparing Table at sector %d\n",
673 pms->st_loc[0]);
674 return(error);
675 }
676 bcopy(bp->b_data, udfmp->s_table, pms->st_size);
677 brelse(bp);
678
679 if (udf_checktag(&udfmp->s_table->tag, 0)) {
680 printf("Invalid sparing table found\n");
681 return(EINVAL);
682 }
683
684 /* See how many valid entries there are here. The list is
685 * supposed to be sorted. 0xfffffff0 and higher are not valid
686 */
687 for (i = 0; i < udfmp->s_table->rt_l; i++) {
688 udfmp->s_table_entries = i;
689 if (udfmp->s_table->entries[i].org >= 0xfffffff0)
690 break;
691 }
692 }
693
694 return(0);
695}