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Ok. I didn't make 2.4.0 in 2000. Tough. I tried, but we had some
[davej-history.git] / fs / udf / super.c
blobf5e9b0b446d85c491764ff707f02610f1e9098b8
1 /*
2 * super.c
3 *
4 * PURPOSE
5 * Super block routines for the OSTA-UDF(tm) filesystem.
6 *
7 * DESCRIPTION
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
10 *
11 * This code is based on version 2.00 of the UDF specification,
12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
13 * http://www.osta.org/
14 * http://www.ecma.ch/
15 * http://www.iso.org/
16 *
17 * CONTACTS
18 * E-mail regarding any portion of the Linux UDF file system should be
19 * directed to the development team mailing list (run by majordomo):
20 * linux_udf@hootie.lvld.hp.com
21 *
22 * COPYRIGHT
23 * This file is distributed under the terms of the GNU General Public
24 * License (GPL). Copies of the GPL can be obtained from:
25 * ftp://prep.ai.mit.edu/pub/gnu/GPL
26 * Each contributing author retains all rights to their own work.
27 *
28 * (C) 1998 Dave Boynton
29 * (C) 1998-2000 Ben Fennema
30 * (C) 2000 Stelias Computing Inc
31 *
32 * HISTORY
33 *
34 * 09/24/98 dgb changed to allow compiling outside of kernel, and
35 * added some debugging.
36 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
37 * 10/16/98 attempting some multi-session support
38 * 10/17/98 added freespace count for "df"
39 * 11/11/98 gr added novrs option
40 * 11/26/98 dgb added fileset,anchor mount options
41 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced vol descs
42 * rewrote option handling based on isofs
43 * 12/20/98 find the free space bitmap (if it exists)
44 */
45
46 #include "udfdecl.h"
47
48 #include <linux/config.h>
49 #include <linux/version.h>
50 #include <linux/blkdev.h>
51 #include <linux/malloc.h>
52 #include <linux/kernel.h>
53 #include <linux/locks.h>
54 #include <linux/module.h>
55 #include <linux/stat.h>
56 #include <linux/cdrom.h>
57 #include <linux/nls.h>
58 #include <asm/byteorder.h>
59
60 #include <linux/udf_fs.h>
61 #include "udf_sb.h"
62 #include "udf_i.h"
63
64 #include <linux/init.h>
65 #include <asm/uaccess.h>
66
67 #define VDS_POS_PRIMARY_VOL_DESC 0
68 #define VDS_POS_UNALLOC_SPACE_DESC 1
69 #define VDS_POS_LOGICAL_VOL_DESC 2
70 #define VDS_POS_PARTITION_DESC 3
71 #define VDS_POS_IMP_USE_VOL_DESC 4
72 #define VDS_POS_VOL_DESC_PTR 5
73 #define VDS_POS_TERMINATING_DESC 6
74 #define VDS_POS_LENGTH 7
75
76 static char error_buf[1024];
77
78 /* These are the "meat" - everything else is stuffing */
79 static struct super_block *udf_read_super(struct super_block *, void *, int);
80 static void udf_put_super(struct super_block *);
81 static void udf_write_super(struct super_block *);
82 static int udf_remount_fs(struct super_block *, int *, char *);
83 static int udf_check_valid(struct super_block *, int, int);
84 static int udf_vrs(struct super_block *sb, int silent);
85 static int udf_load_partition(struct super_block *, lb_addr *);
86 static int udf_load_logicalvol(struct super_block *, struct buffer_head *, lb_addr *);
87 static void udf_load_logicalvolint(struct super_block *, extent_ad);
88 static int udf_find_anchor(struct super_block *, int, int);
89 static int udf_find_fileset(struct super_block *, lb_addr *, lb_addr *);
90 static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
91 static void udf_load_fileset(struct super_block *, struct buffer_head *, lb_addr *);
92 static void udf_load_partdesc(struct super_block *, struct buffer_head *);
93 static void udf_open_lvid(struct super_block *);
94 static void udf_close_lvid(struct super_block *);
95 static unsigned int udf_count_free(struct super_block *);
96 static int udf_statfs(struct super_block *, struct statfs *);
97
98 /* UDF filesystem type */
99 static DECLARE_FSTYPE_DEV(udf_fstype, "udf", udf_read_super);
100
101 /* Superblock operations */
102 static struct super_operations udf_sb_ops = {
103 read_inode: udf_read_inode,
104 write_inode: udf_write_inode,
105 put_inode: udf_put_inode,
106 delete_inode: udf_delete_inode,
107 put_super: udf_put_super,
108 write_super: udf_write_super,
109 statfs: udf_statfs,
110 remount_fs: udf_remount_fs,
111 };
112
113 struct udf_options
114 {
115 unsigned char novrs;
116 unsigned int blocksize;
117 unsigned int session;
118 unsigned int lastblock;
119 unsigned int anchor;
120 unsigned int volume;
121 unsigned short partition;
122 unsigned int fileset;
123 unsigned int rootdir;
124 unsigned int flags;
125 mode_t umask;
126 gid_t gid;
127 uid_t uid;
128 };
129
130 static int __init init_udf_fs(void)
131 {
132 printk(KERN_NOTICE "udf: registering filesystem\n");
133 return register_filesystem(&udf_fstype);
134 }
135
136 static void __exit exit_udf_fs(void)
137 {
138 printk(KERN_NOTICE "udf: unregistering filesystem\n");
139 unregister_filesystem(&udf_fstype);
140 }
141
142 module_init(init_udf_fs)
143 module_exit(exit_udf_fs)
144
145 /*
146 * udf_parse_options
147 *
148 * PURPOSE
149 * Parse mount options.
150 *
151 * DESCRIPTION
152 * The following mount options are supported:
153 *
154 * gid= Set the default group.
155 * umask= Set the default umask.
156 * uid= Set the default user.
157 * bs= Set the block size.
158 * unhide Show otherwise hidden files.
159 * undelete Show deleted files in lists.
160 * adinicb Embed data in the inode (default)
161 * noadinicb Don't embed data in the inode
162 * shortad Use short ad's
163 * longad Use long ad's (default)
164 * strict Set strict conformance (unused)
165 *
166 * The remaining are for debugging and disaster recovery:
167 *
168 * novrs Skip volume sequence recognition
169 *
170 * The following expect a offset from 0.
171 *
172 * session= Set the CDROM session (default= last session)
173 * anchor= Override standard anchor location. (default= 256)
174 * volume= Override the VolumeDesc location. (unused)
175 * partition= Override the PartitionDesc location. (unused)
176 * lastblock= Set the last block of the filesystem/
177 *
178 * The following expect a offset from the partition root.
179 *
180 * fileset= Override the fileset block location. (unused)
181 * rootdir= Override the root directory location. (unused)
182 * WARNING: overriding the rootdir to a non-directory may
183 * yield highly unpredictable results.
184 *
185 * PRE-CONDITIONS
186 * options Pointer to mount options string.
187 * uopts Pointer to mount options variable.
188 *
189 * POST-CONDITIONS
190 * <return> 0 Mount options parsed okay.
191 * <return> -1 Error parsing mount options.
192 *
193 * HISTORY
194 * July 1, 1997 - Andrew E. Mileski
195 * Written, tested, and released.
196 */
197
198 static int
199 udf_parse_options(char *options, struct udf_options *uopt)
200 {
201 char *opt, *val;
202
203 uopt->novrs = 0;
204 uopt->blocksize = 512;
205 uopt->partition = 0xFFFF;
206 uopt->session = 0xFFFFFFFF;
207 uopt->lastblock = 0xFFFFFFFF;
208 uopt->anchor = 0xFFFFFFFF;
209 uopt->volume = 0xFFFFFFFF;
210 uopt->rootdir = 0xFFFFFFFF;
211 uopt->fileset = 0xFFFFFFFF;
212
213 if (!options)
214 return 1;
215
216 for (opt = strtok(options, ","); opt; opt = strtok(NULL, ","))
217 {
218 /* Make "opt=val" into two strings */
219 val = strchr(opt, '=');
220 if (val)
221 *(val++) = 0;
222 if (!strcmp(opt, "novrs") && !val)
223 uopt->novrs = 1;
224 else if (!strcmp(opt, "bs") && val)
225 uopt->blocksize = simple_strtoul(val, NULL, 0);
226 else if (!strcmp(opt, "unhide") && !val)
227 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
228 else if (!strcmp(opt, "undelete") && !val)
229 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
230 else if (!strcmp(opt, "noadinicb") && !val)
231 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
232 else if (!strcmp(opt, "adinicb") && !val)
233 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
234 else if (!strcmp(opt, "shortad") && !val)
235 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
236 else if (!strcmp(opt, "longad") && !val)
237 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
238 else if (!strcmp(opt, "gid") && val)
239 uopt->gid = simple_strtoul(val, NULL, 0);
240 else if (!strcmp(opt, "umask") && val)
241 uopt->umask = simple_strtoul(val, NULL, 0);
242 else if (!strcmp(opt, "strict") && !val)
243 uopt->flags |= (1 << UDF_FLAG_STRICT);
244 else if (!strcmp(opt, "uid") && val)
245 uopt->uid = simple_strtoul(val, NULL, 0);
246 else if (!strcmp(opt, "session") && val)
247 uopt->session = simple_strtoul(val, NULL, 0);
248 else if (!strcmp(opt, "lastblock") && val)
249 uopt->lastblock = simple_strtoul(val, NULL, 0);
250 else if (!strcmp(opt, "anchor") && val)
251 uopt->anchor = simple_strtoul(val, NULL, 0);
252 else if (!strcmp(opt, "volume") && val)
253 uopt->volume = simple_strtoul(val, NULL, 0);
254 else if (!strcmp(opt, "partition") && val)
255 uopt->partition = simple_strtoul(val, NULL, 0);
256 else if (!strcmp(opt, "fileset") && val)
257 uopt->fileset = simple_strtoul(val, NULL, 0);
258 else if (!strcmp(opt, "rootdir") && val)
259 uopt->rootdir = simple_strtoul(val, NULL, 0);
260 else if (val)
261 {
262 printk(KERN_ERR "udf: bad mount option \"%s=%s\"\n",
263 opt, val);
264 return 0;
265 }
266 else
267 {
268 printk(KERN_ERR "udf: bad mount option \"%s\"\n",
269 opt);
270 return 0;
271 }
272 }
273 return 1;
274 }
275
276 void
277 udf_write_super(struct super_block *sb)
278 {
279 if (!(sb->s_flags & MS_RDONLY))
280 udf_open_lvid(sb);
281 sb->s_dirt = 0;
282 }
283
284 static int
285 udf_remount_fs(struct super_block *sb, int *flags, char *options)
286 {
287 struct udf_options uopt;
288
289 uopt.flags = UDF_SB(sb)->s_flags ;
290 uopt.uid = UDF_SB(sb)->s_uid ;
291 uopt.gid = UDF_SB(sb)->s_gid ;
292 uopt.umask = UDF_SB(sb)->s_umask ;
293
294 if ( !udf_parse_options(options, &uopt) )
295 return -EINVAL;
296
297 UDF_SB(sb)->s_flags = uopt.flags;
298 UDF_SB(sb)->s_uid = uopt.uid;
299 UDF_SB(sb)->s_gid = uopt.gid;
300 UDF_SB(sb)->s_umask = uopt.umask;
301
302 #if CONFIG_UDF_RW != 1
303 *flags |= MS_RDONLY;
304 #endif
305
306 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
307 return 0;
308 if (*flags & MS_RDONLY)
309 udf_close_lvid(sb);
310 else
311 udf_open_lvid(sb);
312
313 return 0;
314 }
315
316 /*
317 * udf_set_blocksize
318 *
319 * PURPOSE
320 * Set the block size to be used in all transfers.
321 *
322 * DESCRIPTION
323 * To allow room for a DMA transfer, it is best to guess big when unsure.
324 * This routine picks 2048 bytes as the blocksize when guessing. This
325 * should be adequate until devices with larger block sizes become common.
326 *
327 * Note that the Linux kernel can currently only deal with blocksizes of
328 * 512, 1024, 2048, 4096, and 8192 bytes.
329 *
330 * PRE-CONDITIONS
331 * sb Pointer to _locked_ superblock.
332 *
333 * POST-CONDITIONS
334 * sb->s_blocksize Blocksize.
335 * sb->s_blocksize_bits log2 of blocksize.
336 * <return> 0 Blocksize is valid.
337 * <return> 1 Blocksize is invalid.
338 *
339 * HISTORY
340 * July 1, 1997 - Andrew E. Mileski
341 * Written, tested, and released.
342 */
343 static int
344 udf_set_blocksize(struct super_block *sb, int bsize)
345 {
346 /* Use specified block size if specified */
347 if (!(sb->s_blocksize = get_hardblocksize(sb->s_dev)))
348 sb->s_blocksize = 2048;
349 if (bsize > sb->s_blocksize)
350 sb->s_blocksize = bsize;
351
352 /* Block size must be an even multiple of 512 */
353 switch (sb->s_blocksize) {
354 case 512: sb->s_blocksize_bits = 9; break;
355 case 1024: sb->s_blocksize_bits = 10; break;
356 case 2048: sb->s_blocksize_bits = 11; break;
357 case 4096: sb->s_blocksize_bits = 12; break;
358 case 8192: sb->s_blocksize_bits = 13; break;
359 default:
360 {
361 udf_debug("Bad block size (%ld)\n", sb->s_blocksize);
362 printk(KERN_ERR "udf: bad block size (%ld)\n", sb->s_blocksize);
363 return 0;
364 }
365 }
366
367 /* Set the block size */
368 set_blocksize(sb->s_dev, sb->s_blocksize);
369 return sb->s_blocksize;
370 }
371
372 static int
373 udf_vrs(struct super_block *sb, int silent)
374 {
375 struct VolStructDesc *vsd = NULL;
376 int sector = 32768;
377 struct buffer_head *bh = NULL;
378 int iso9660=0;
379 int nsr02=0;
380 int nsr03=0;
381
382 /* Block size must be a multiple of 512 */
383 if (sb->s_blocksize & 511)
384 return sector;
385
386 sector += (UDF_SB_SESSION(sb) << sb->s_blocksize_bits);
387
388 udf_debug("Starting at sector %u (%ld byte sectors)\n",
389 (sector >> sb->s_blocksize_bits), sb->s_blocksize);
390 /* Process the sequence (if applicable) */
391 for (;!nsr02 && !nsr03; sector += 2048)
392 {
393 /* Read a block */
394 bh = udf_tread(sb, sector >> sb->s_blocksize_bits, sb->s_blocksize);
395 if (!bh)
396 break;
397
398 /* Look for ISO descriptors */
399 vsd = (struct VolStructDesc *)(bh->b_data +
400 (sector & (sb->s_blocksize - 1)));
401
402 if (vsd->stdIdent[0] == 0)
403 {
404 udf_release_data(bh);
405 break;
406 }
407 else if (!strncmp(vsd->stdIdent, STD_ID_CD001, STD_ID_LEN))
408 {
409 iso9660 = sector;
410 switch (vsd->structType)
411 {
412 case 0:
413 udf_debug("ISO9660 Boot Record found\n");
414 break;
415 case 1:
416 udf_debug("ISO9660 Primary Volume Descriptor found\n");
417 break;
418 case 2:
419 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
420 break;
421 case 3:
422 udf_debug("ISO9660 Volume Partition Descriptor found\n");
423 break;
424 case 255:
425 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
426 break;
427 default:
428 udf_debug("ISO9660 VRS (%u) found\n", vsd->structType);
429 break;
430 }
431 }
432 else if (!strncmp(vsd->stdIdent, STD_ID_BEA01, STD_ID_LEN))
433 {
434 }
435 else if (!strncmp(vsd->stdIdent, STD_ID_TEA01, STD_ID_LEN))
436 {
437 udf_release_data(bh);
438 break;
439 }
440 else if (!strncmp(vsd->stdIdent, STD_ID_NSR02, STD_ID_LEN))
441 {
442 nsr02 = sector;
443 }
444 else if (!strncmp(vsd->stdIdent, STD_ID_NSR03, STD_ID_LEN))
445 {
446 nsr03 = sector;
447 }
448 udf_release_data(bh);
449 }
450
451 if (nsr03)
452 return nsr03;
453 else if (nsr02)
454 return nsr02;
455 else if (sector - (UDF_SB_SESSION(sb) << sb->s_blocksize_bits) == 32768)
456 return -1;
457 else
458 return 0;
459 }
460
461 /*
462 * udf_find_anchor
463 *
464 * PURPOSE
465 * Find an anchor volume descriptor.
466 *
467 * PRE-CONDITIONS
468 * sb Pointer to _locked_ superblock.
469 * lastblock Last block on media.
470 *
471 * POST-CONDITIONS
472 * <return> 1 if not found, 0 if ok
473 *
474 * HISTORY
475 * July 1, 1997 - Andrew E. Mileski
476 * Written, tested, and released.
477 */
478 static int
479 udf_find_anchor(struct super_block *sb, int useranchor, int lastblock)
480 {
481 int varlastblock = udf_variable_to_fixed(lastblock);
482 int last[] = { lastblock, lastblock - 2,
483 lastblock - 150, lastblock - 152,
484 varlastblock, varlastblock - 2,
485 varlastblock - 150, varlastblock - 152 };
486 struct buffer_head *bh = NULL;
487 Uint16 ident;
488 Uint32 location;
489 int i;
490
491 UDF_SB_ANCHOR(sb)[0] = 0;
492 UDF_SB_ANCHOR(sb)[1] = 0;
493 UDF_SB_ANCHOR(sb)[2] = 0;
494 UDF_SB_ANCHOR(sb)[3] = 256 + UDF_SB_SESSION(sb);
495
496 lastblock = 0;
497
498 /* Search for an anchor volume descriptor pointer */
499
500 /* according to spec, anchor is in either:
501 * block 256
502 * lastblock-256
503 * lastblock
504 * however, if the disc isn't closed, it could be 512 */
505
506 for (i=0; (!lastblock && i<sizeof(last)/sizeof(int)); i++)
507 {
508 if (!(bh = bread(sb->s_dev, last[i], sb->s_blocksize)))
509 {
510 ident = location = 0;
511 }
512 else
513 {
514 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
515 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
516 udf_release_data(bh);
517 }
518
519 if (ident == TID_ANCHOR_VOL_DESC_PTR)
520 {
521 if (location == last[i] - UDF_SB_SESSION(sb))
522 {
523 lastblock = UDF_SB_ANCHOR(sb)[0] = last[i];
524 UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
525 }
526 else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb))
527 {
528 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
529 lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]);
530 UDF_SB_ANCHOR(sb)[1] = lastblock - 256;
531 }
532 else
533 udf_debug("Anchor found at block %d, location mismatch %d.\n",
534 last[i], location);
535 }
536 else if (ident == TID_FILE_ENTRY || ident == TID_EXTENDED_FILE_ENTRY)
537 {
538 lastblock = last[i];
539 UDF_SB_ANCHOR(sb)[2] = 512 + UDF_SB_SESSION(sb);
540 }
541 else
542 {
543 if (!(bh = bread(sb->s_dev, last[i] - 256, sb->s_blocksize)))
544 {
545 ident = location = 0;
546 }
547 else
548 {
549 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
550 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
551 udf_release_data(bh);
552 }
553
554 if (ident == TID_ANCHOR_VOL_DESC_PTR &&
555 location == last[i] - 256 - UDF_SB_SESSION(sb))
556 {
557 lastblock = last[i];
558 UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
559 }
560 else
561 {
562 if (!(bh = bread(sb->s_dev, last[i] - 312 - UDF_SB_SESSION(sb),
563 sb->s_blocksize)))
564 {
565 ident = location = 0;
566 }
567 else
568 {
569 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
570 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
571 udf_release_data(bh);
572 }
573
574 if (ident == TID_ANCHOR_VOL_DESC_PTR &&
575 location == udf_variable_to_fixed(last[i]) - 256)
576 {
577 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
578 lastblock = udf_variable_to_fixed(last[i]);
579 UDF_SB_ANCHOR(sb)[1] = lastblock - 256;
580 }
581 }
582 }
583 }
584
585 if (!lastblock)
586 {
587 /* We havn't found the lastblock. check 312 */
588 if ((bh = bread(sb->s_dev, 312 + UDF_SB_SESSION(sb), sb->s_blocksize)))
589 {
590 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
591 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
592 udf_release_data(bh);
593
594 if (ident == TID_ANCHOR_VOL_DESC_PTR && location == 256)
595 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
596 }
597 }
598
599 for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
600 {
601 if (UDF_SB_ANCHOR(sb)[i])
602 {
603 if (!(bh = udf_read_tagged(sb,
604 UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident)))
605 {
606 UDF_SB_ANCHOR(sb)[i] = 0;
607 }
608 else
609 {
610 udf_release_data(bh);
611 if ((ident != TID_ANCHOR_VOL_DESC_PTR) && (i ||
612 (ident != TID_FILE_ENTRY && ident != TID_EXTENDED_FILE_ENTRY)))
613 {
614 UDF_SB_ANCHOR(sb)[i] = 0;
615 }
616 }
617 }
618 else if (useranchor != 0xFFFFFFFF)
619 {
620 UDF_SB_ANCHOR(sb)[i] = useranchor;
621 useranchor = 0xFFFFFFFF;
622 i --;
623 }
624 }
625
626 return lastblock;
627 }
628
629 static int
630 udf_find_fileset(struct super_block *sb, lb_addr *fileset, lb_addr *root)
631 {
632 struct buffer_head *bh = NULL;
633 long lastblock;
634 Uint16 ident;
635
636 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
637 fileset->partitionReferenceNum != 0xFFFF)
638 {
639 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
640
641 if (!bh)
642 return 1;
643 else if (ident != TID_FILE_SET_DESC)
644 {
645 udf_release_data(bh);
646 return 1;
647 }
648
649 }
650
651 if (!bh) /* Search backwards through the partitions */
652 {
653 lb_addr newfileset;
654
655 return 1;
656
657 for (newfileset.partitionReferenceNum=UDF_SB_NUMPARTS(sb)-1;
658 (newfileset.partitionReferenceNum != 0xFFFF &&
659 fileset->logicalBlockNum == 0xFFFFFFFF &&
660 fileset->partitionReferenceNum == 0xFFFF);
661 newfileset.partitionReferenceNum--)
662 {
663 lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum);
664 newfileset.logicalBlockNum = 0;
665
666 do
667 {
668 bh = udf_read_ptagged(sb, newfileset, 0, &ident);
669 if (!bh)
670 {
671 newfileset.logicalBlockNum ++;
672 continue;
673 }
674
675 switch (ident)
676 {
677 case TID_SPACE_BITMAP_DESC:
678 {
679 struct SpaceBitmapDesc *sp;
680 sp = (struct SpaceBitmapDesc *)bh->b_data;
681 newfileset.logicalBlockNum += 1 +
682 ((le32_to_cpu(sp->numOfBytes) + sizeof(struct SpaceBitmapDesc) - 1)
683 >> sb->s_blocksize_bits);
684 udf_release_data(bh);
685 break;
686 }
687 case TID_FILE_SET_DESC:
688 {
689 *fileset = newfileset;
690 break;
691 }
692 default:
693 {
694 newfileset.logicalBlockNum ++;
695 udf_release_data(bh);
696 bh = NULL;
697 break;
698 }
699 }
700 }
701 while (newfileset.logicalBlockNum < lastblock &&
702 fileset->logicalBlockNum == 0xFFFFFFFF &&
703 fileset->partitionReferenceNum == 0xFFFF);
704 }
705 }
706
707 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
708 fileset->partitionReferenceNum != 0xFFFF) && bh)
709 {
710 udf_debug("Fileset at block=%d, partition=%d\n",
711 fileset->logicalBlockNum, fileset->partitionReferenceNum);
712
713 UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum;
714 udf_load_fileset(sb, bh, root);
715 udf_release_data(bh);
716 return 0;
717 }
718 return 1;
719 }
720
721 static void
722 udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
723 {
724 struct PrimaryVolDesc *pvoldesc;
725 time_t recording;
726 long recording_usec;
727 struct ustr instr;
728 struct ustr outstr;
729
730 pvoldesc = (struct PrimaryVolDesc *)bh->b_data;
731
732 if ( udf_stamp_to_time(&recording, &recording_usec,
733 lets_to_cpu(pvoldesc->recordingDateAndTime)) )
734 {
735 timestamp ts;
736 ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
737 udf_debug("recording time %ld/%ld, %04u/%02u/%02u %02u:%02u (%x)\n",
738 recording, recording_usec,
739 ts.year, ts.month, ts.day, ts.hour, ts.minute, ts.typeAndTimezone);
740 UDF_SB_RECORDTIME(sb) = recording;
741 }
742
743 if ( !udf_build_ustr(&instr, pvoldesc->volIdent, 32) )
744 {
745 if (udf_CS0toUTF8(&outstr, &instr))
746 {
747 strncpy( UDF_SB_VOLIDENT(sb), outstr.u_name,
748 outstr.u_len > 31 ? 31 : outstr.u_len);
749 udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb));
750 }
751 }
752
753 if ( !udf_build_ustr(&instr, pvoldesc->volSetIdent, 128) )
754 {
755 if (udf_CS0toUTF8(&outstr, &instr))
756 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
757 }
758 }
759
760 static void
761 udf_load_fileset(struct super_block *sb, struct buffer_head *bh, lb_addr *root)
762 {
763 struct FileSetDesc *fset;
764
765 fset = (struct FileSetDesc *)bh->b_data;
766
767 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
768
769 UDF_SB_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum);
770
771 udf_debug("Rootdir at block=%d, partition=%d\n",
772 root->logicalBlockNum, root->partitionReferenceNum);
773 }
774
775 static void
776 udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
777 {
778 struct PartitionDesc *p;
779 int i;
780
781 p=(struct PartitionDesc *)bh->b_data;
782
783 for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
784 {
785 udf_debug("Searching map: (%d == %d)\n",
786 UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber));
787 if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber))
788 {
789 UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */
790 UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation) + UDF_SB_SESSION(sb);
791
792 if (UDF_SB_PARTTYPE(sb,i) == UDF_SPARABLE_MAP15)
793 udf_fill_spartable(sb, &UDF_SB_TYPESPAR(sb,i), UDF_SB_PARTLEN(sb,i));
794
795 if (!strcmp(p->partitionContents.ident, PARTITION_CONTENTS_NSR02) ||
796 !strcmp(p->partitionContents.ident, PARTITION_CONTENTS_NSR03))
797 {
798 struct PartitionHeaderDesc *phd;
799
800 phd = (struct PartitionHeaderDesc *)(p->partitionContentsUse);
801 if (phd->unallocatedSpaceTable.extLength)
802 udf_debug("unallocatedSpaceTable (part %d)\n", i);
803 if (phd->unallocatedSpaceBitmap.extLength)
804 {
805 UDF_SB_PARTMAPS(sb)[i].s_uspace.bitmap =
806 le32_to_cpu(phd->unallocatedSpaceBitmap.extPosition);
807 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP;
808 udf_debug("unallocatedSpaceBitmap (part %d) @ %d\n",
809 i, UDF_SB_PARTMAPS(sb)[i].s_uspace.bitmap);
810 }
811 if (phd->partitionIntegrityTable.extLength)
812 udf_debug("partitionIntegrityTable (part %d)\n", i);
813 if (phd->freedSpaceTable.extLength)
814 udf_debug("freedSpaceTable (part %d)\n", i);
815 if (phd->freedSpaceBitmap.extLength)
816 {
817 UDF_SB_PARTMAPS(sb)[i].s_fspace.bitmap =
818 le32_to_cpu(phd->freedSpaceBitmap.extPosition);
819 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP;
820 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
821 i, UDF_SB_PARTMAPS(sb)[i].s_fspace.bitmap);
822 }
823 }
824 break;
825 }
826 }
827 if (i == UDF_SB_NUMPARTS(sb))
828 {
829 udf_debug("Partition (%d) not found in partition map\n", le16_to_cpu(p->partitionNumber));
830 }
831 else
832 {
833 udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %d\n",
834 le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i),
835 UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i));
836 }
837 }
838
839 static int
840 udf_load_logicalvol(struct super_block *sb, struct buffer_head * bh, lb_addr *fileset)
841 {
842 struct LogicalVolDesc *lvd;
843 int i, j, offset;
844 Uint8 type;
845
846 lvd = (struct LogicalVolDesc *)bh->b_data;
847
848 UDF_SB_NUMPARTS(sb) = le32_to_cpu(lvd->numPartitionMaps);
849 UDF_SB_ALLOC_PARTMAPS(sb, UDF_SB_NUMPARTS(sb));
850
851 for (i=0,offset=0;
852 i<UDF_SB_NUMPARTS(sb) && offset<le32_to_cpu(lvd->mapTableLength);
853 i++,offset+=((struct GenericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength)
854 {
855 type = ((struct GenericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType;
856 udf_debug("Partition (%d) type %d\n", i, type);
857 if (type == 1)
858 {
859 struct GenericPartitionMap1 *gpm1 = (struct GenericPartitionMap1 *)&(lvd->partitionMaps[offset]);
860 UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15;
861 UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum);
862 UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum);
863 UDF_SB_PARTFUNC(sb,i) = NULL;
864 }
865 else if (type == 2)
866 {
867 struct UdfPartitionMap2 *upm2 = (struct UdfPartitionMap2 *)&(lvd->partitionMaps[offset]);
868 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL)))
869 {
870 if (le16_to_cpu(((Uint16 *)upm2->partIdent.identSuffix)[0]) == 0x0150)
871 {
872 UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15;
873 UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15;
874 }
875 else if (le16_to_cpu(((Uint16 *)upm2->partIdent.identSuffix)[0]) == 0x0200)
876 {
877 UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20;
878 UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20;
879 }
880 }
881 else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE)))
882 {
883 int plen;
884
885 struct SparablePartitionMap *spm = (struct SparablePartitionMap *)&(lvd->partitionMaps[offset]);
886 UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15;
887 plen = le16_to_cpu(spm->packetLength);
888 UDF_SB_TYPESPAR(sb,i).s_spar_pshift = 0;
889 while (plen >>= 1)
890 UDF_SB_TYPESPAR(sb,i).s_spar_pshift ++;
891 for (j=0; j<spm->numSparingTables; j++)
892 UDF_SB_TYPESPAR(sb,i).s_spar_loc[j] = le32_to_cpu(spm->locSparingTable[j]);
893 UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15;
894 }
895 else
896 {
897 udf_debug("Unknown ident: %s\n", upm2->partIdent.ident);
898 continue;
899 }
900 UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum);
901 UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum);
902 }
903 }
904
905 if (fileset)
906 {
907 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
908
909 *fileset = lelb_to_cpu(la->extLocation);
910 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
911 fileset->logicalBlockNum,
912 fileset->partitionReferenceNum);
913 }
914 if (lvd->integritySeqExt.extLength)
915 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
916 return 0;
917 }
918
919 /*
920 * udf_load_logicalvolint
921 *
922 */
923 static void
924 udf_load_logicalvolint(struct super_block *sb, extent_ad loc)
925 {
926 struct buffer_head *bh = NULL;
927 Uint16 ident;
928
929 while ((bh = udf_read_tagged(sb, loc.extLocation, loc.extLocation, &ident)) &&
930 ident == TID_LOGICAL_VOL_INTEGRITY_DESC && loc.extLength > 0)
931 {
932 UDF_SB_LVIDBH(sb) = bh;
933
934 if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength)
935 udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt));
936
937 if (UDF_SB_LVIDBH(sb) != bh)
938 udf_release_data(bh);
939 loc.extLength -= sb->s_blocksize;
940 loc.extLocation ++;
941 }
942 if (UDF_SB_LVIDBH(sb) != bh)
943 udf_release_data(bh);
944 }
945
946 /*
947 * udf_process_sequence
948 *
949 * PURPOSE
950 * Process a main/reserve volume descriptor sequence.
951 *
952 * PRE-CONDITIONS
953 * sb Pointer to _locked_ superblock.
954 * block First block of first extent of the sequence.
955 * lastblock Lastblock of first extent of the sequence.
956 *
957 * HISTORY
958 * July 1, 1997 - Andrew E. Mileski
959 * Written, tested, and released.
960 */
961 static int
962 udf_process_sequence(struct super_block *sb, long block, long lastblock, lb_addr *fileset)
963 {
964 struct buffer_head *bh = NULL;
965 struct udf_vds_record vds[VDS_POS_LENGTH];
966 struct GenericDesc *gd;
967 int done=0;
968 int i,j;
969 Uint32 vdsn;
970 Uint16 ident;
971
972 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
973
974 /* Read the main descriptor sequence */
975 for (;(!done && block <= lastblock); block++)
976 {
977
978 bh = udf_read_tagged(sb, block, block, &ident);
979 if (!bh)
980 break;
981
982 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
983 gd = (struct GenericDesc *)bh->b_data;
984 vdsn = le32_to_cpu(gd->volDescSeqNum);
985 switch (ident)
986 {
987 case TID_PRIMARY_VOL_DESC: /* ISO 13346 3/10.1 */
988 if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum)
989 {
990 vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn;
991 vds[VDS_POS_PRIMARY_VOL_DESC].block = block;
992 }
993 break;
994 case TID_VOL_DESC_PTR: /* ISO 13346 3/10.3 */
995 if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum)
996 {
997 vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn;
998 vds[VDS_POS_VOL_DESC_PTR].block = block;
999 }
1000 break;
1001 case TID_IMP_USE_VOL_DESC: /* ISO 13346 3/10.4 */
1002 if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum)
1003 {
1004 vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn;
1005 vds[VDS_POS_IMP_USE_VOL_DESC].block = block;
1006 }
1007 break;
1008 case TID_PARTITION_DESC: /* ISO 13346 3/10.5 */
1009 if (!vds[VDS_POS_PARTITION_DESC].block)
1010 vds[VDS_POS_PARTITION_DESC].block = block;
1011 break;
1012 case TID_LOGICAL_VOL_DESC: /* ISO 13346 3/10.6 */
1013 if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum)
1014 {
1015 vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn;
1016 vds[VDS_POS_LOGICAL_VOL_DESC].block = block;
1017 }
1018 break;
1019 case TID_UNALLOC_SPACE_DESC: /* ISO 13346 3/10.8 */
1020 if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum)
1021 {
1022 vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn;
1023 vds[VDS_POS_UNALLOC_SPACE_DESC].block = block;
1024 }
1025 break;
1026 case TID_TERMINATING_DESC: /* ISO 13346 3/10.9 */
1027 vds[VDS_POS_TERMINATING_DESC].block = block;
1028 done = 1;
1029 break;
1030 }
1031 udf_release_data(bh);
1032 }
1033 for (i=0; i<VDS_POS_LENGTH; i++)
1034 {
1035 if (vds[i].block)
1036 {
1037 bh = udf_read_tagged(sb, vds[i].block, vds[i].block, &ident);
1038
1039 if (i == VDS_POS_PRIMARY_VOL_DESC)
1040 udf_load_pvoldesc(sb, bh);
1041 else if (i == VDS_POS_LOGICAL_VOL_DESC)
1042 udf_load_logicalvol(sb, bh, fileset);
1043 else if (i == VDS_POS_PARTITION_DESC)
1044 {
1045 struct buffer_head *bh2 = NULL;
1046 udf_load_partdesc(sb, bh);
1047 for (j=vds[i].block+1; j<vds[VDS_POS_TERMINATING_DESC].block; j++)
1048 {
1049 bh2 = udf_read_tagged(sb, j, j, &ident);
1050 gd = (struct GenericDesc *)bh2->b_data;
1051 if (ident == TID_PARTITION_DESC)
1052 udf_load_partdesc(sb, bh2);
1053 udf_release_data(bh2);
1054 }
1055 }
1056 udf_release_data(bh);
1057 }
1058 }
1059
1060 return 0;
1061 }
1062
1063 /*
1064 * udf_check_valid()
1065 */
1066 static int
1067 udf_check_valid(struct super_block *sb, int novrs, int silent)
1068 {
1069 long block;
1070
1071 if (novrs)
1072 {
1073 udf_debug("Validity check skipped because of novrs option\n");
1074 return 0;
1075 }
1076 /* Check that it is NSR02 compliant */
1077 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1078 else if ((block = udf_vrs(sb, silent)) == -1)
1079 {
1080 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
1081 return 0;
1082 }
1083 else
1084 return !block;
1085 }
1086
1087 static int
1088 udf_load_partition(struct super_block *sb, lb_addr *fileset)
1089 {
1090 struct AnchorVolDescPtr *anchor;
1091 Uint16 ident;
1092 struct buffer_head *bh;
1093 long main_s, main_e, reserve_s, reserve_e;
1094 int i, j;
1095
1096 if (!sb)
1097 return 1;
1098
1099 for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
1100 {
1101 if (UDF_SB_ANCHOR(sb)[i] && (bh = udf_read_tagged(sb,
1102 UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i] - UDF_SB_SESSION(sb), &ident)))
1103 {
1104 anchor = (struct AnchorVolDescPtr *)bh->b_data;
1105
1106 /* Locate the main sequence */
1107 main_s = le32_to_cpu( anchor->mainVolDescSeqExt.extLocation );
1108 main_e = le32_to_cpu( anchor->mainVolDescSeqExt.extLength );
1109 main_e = main_e >> sb->s_blocksize_bits;
1110 main_e += main_s;
1111
1112 /* Locate the reserve sequence */
1113 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1114 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1115 reserve_e = reserve_e >> sb->s_blocksize_bits;
1116 reserve_e += reserve_s;
1117
1118 udf_release_data(bh);
1119
1120 /* Process the main & reserve sequences */
1121 /* responsible for finding the PartitionDesc(s) */
1122 if (!(udf_process_sequence(sb, main_s, main_e, fileset) &&
1123 udf_process_sequence(sb, reserve_s, reserve_e, fileset)))
1124 {
1125 break;
1126 }
1127 }
1128 }
1129
1130 if (i == sizeof(UDF_SB_ANCHOR(sb))/sizeof(int))
1131 {
1132 udf_debug("No Anchor block found\n");
1133 return 1;
1134 }
1135 else
1136 udf_debug("Using anchor in block %d\n", UDF_SB_ANCHOR(sb)[i]);
1137
1138 for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
1139 {
1140 switch UDF_SB_PARTTYPE(sb, i)
1141 {
1142 case UDF_VIRTUAL_MAP15:
1143 case UDF_VIRTUAL_MAP20:
1144 {
1145 lb_addr ino;
1146
1147 if (!UDF_SB_LASTBLOCK(sb))
1148 {
1149 udf_debug("Unable to determine Lastblock (For Virtual Partition)\n");
1150 return 1;
1151 }
1152
1153 for (j=0; j<UDF_SB_NUMPARTS(sb); j++)
1154 {
1155 if (j != i &&
1156 UDF_SB_PARTVSN(sb,i) == UDF_SB_PARTVSN(sb,j) &&
1157 UDF_SB_PARTNUM(sb,i) == UDF_SB_PARTNUM(sb,j))
1158 {
1159 ino.partitionReferenceNum = j;
1160 ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) -
1161 UDF_SB_PARTROOT(sb,j);
1162 break;
1163 }
1164 }
1165
1166 if (j == UDF_SB_NUMPARTS(sb))
1167 return 1;
1168
1169 if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino)))
1170 return 1;
1171
1172 if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP15)
1173 {
1174 UDF_SB_TYPEVIRT(sb,i).s_start_offset = udf_ext0_offset(UDF_SB_VAT(sb));
1175 UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 36) >> 2;
1176 }
1177 else if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP20)
1178 {
1179 struct buffer_head *bh = NULL;
1180 Uint32 pos;
1181
1182 pos = udf_block_map(UDF_SB_VAT(sb), 0);
1183 bh = bread(sb->s_dev, pos, sb->s_blocksize);
1184 UDF_SB_TYPEVIRT(sb,i).s_start_offset =
1185 le16_to_cpu(((struct VirtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) +
1186 udf_ext0_offset(UDF_SB_VAT(sb));
1187 UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size -
1188 UDF_SB_TYPEVIRT(sb,i).s_start_offset) >> 2;
1189 udf_release_data(bh);
1190 }
1191 UDF_SB_PARTROOT(sb,i) = udf_get_pblock(sb, 0, i, 0);
1192 UDF_SB_PARTLEN(sb,i) = UDF_SB_PARTLEN(sb,ino.partitionReferenceNum);
1193 }
1194 }
1195 }
1196 return 0;
1197 }
1198
1199 static void udf_open_lvid(struct super_block *sb)
1200 {
1201 if (UDF_SB_LVIDBH(sb))
1202 {
1203 int i;
1204 timestamp cpu_time;
1205
1206 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1207 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1208 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME, CURRENT_UTIME))
1209 UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
1210 UDF_SB_LVID(sb)->integrityType = INTEGRITY_TYPE_OPEN;
1211
1212 UDF_SB_LVID(sb)->descTag.descCRC =
1213 cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
1214 le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
1215
1216 UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
1217 for (i=0; i<16; i++)
1218 if (i != 4)
1219 UDF_SB_LVID(sb)->descTag.tagChecksum +=
1220 ((Uint8 *)&(UDF_SB_LVID(sb)->descTag))[i];
1221
1222 mark_buffer_dirty(UDF_SB_LVIDBH(sb));
1223 sb->s_dirt = 0;
1224 }
1225 }
1226
1227 static void udf_close_lvid(struct super_block *sb)
1228 {
1229 if (UDF_SB_LVIDBH(sb) &&
1230 UDF_SB_LVID(sb)->integrityType == INTEGRITY_TYPE_OPEN)
1231 {
1232 int i;
1233 timestamp cpu_time;
1234
1235 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1236 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1237 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME, CURRENT_UTIME))
1238 UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
1239 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev))
1240 UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1241 if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev))
1242 UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb));
1243 if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev))
1244 UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb));
1245 UDF_SB_LVID(sb)->integrityType = INTEGRITY_TYPE_CLOSE;
1246
1247 UDF_SB_LVID(sb)->descTag.descCRC =
1248 cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
1249 le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
1250
1251 UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
1252 for (i=0; i<16; i++)
1253 if (i != 4)
1254 UDF_SB_LVID(sb)->descTag.tagChecksum +=
1255 ((Uint8 *)&(UDF_SB_LVID(sb)->descTag))[i];
1256
1257 mark_buffer_dirty(UDF_SB_LVIDBH(sb));
1258 }
1259 }
1260
1261 /*
1262 * udf_read_super
1263 *
1264 * PURPOSE
1265 * Complete the specified super block.
1266 *
1267 * PRE-CONDITIONS
1268 * sb Pointer to superblock to complete - never NULL.
1269 * sb->s_dev Device to read suberblock from.
1270 * options Pointer to mount options.
1271 * silent Silent flag.
1272 *
1273 * HISTORY
1274 * July 1, 1997 - Andrew E. Mileski
1275 * Written, tested, and released.
1276 */
1277 static struct super_block *
1278 udf_read_super(struct super_block *sb, void *options, int silent)
1279 {
1280 struct inode *inode=NULL;
1281 struct udf_options uopt;
1282 lb_addr rootdir, fileset;
1283 int i;
1284
1285 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB);
1286 uopt.uid = -1;
1287 uopt.gid = -1;
1288 uopt.umask = 0;
1289
1290 memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info));
1291
1292 #if CONFIG_UDF_RW != 1
1293 sb->s_flags |= MS_RDONLY;
1294 #endif
1295
1296 if (!udf_parse_options((char *)options, &uopt))
1297 goto error_out;
1298
1299 fileset.logicalBlockNum = 0xFFFFFFFF;
1300 fileset.partitionReferenceNum = 0xFFFF;
1301
1302 UDF_SB(sb)->s_flags = uopt.flags;
1303 UDF_SB(sb)->s_uid = uopt.uid;
1304 UDF_SB(sb)->s_gid = uopt.gid;
1305 UDF_SB(sb)->s_umask = uopt.umask;
1306
1307 /* Set the block size for all transfers */
1308 if (!udf_set_blocksize(sb, uopt.blocksize))
1309 goto error_out;
1310
1311 if ( uopt.session == 0xFFFFFFFF )
1312 UDF_SB_SESSION(sb) = udf_get_last_session(sb);
1313 else
1314 UDF_SB_SESSION(sb) = uopt.session;
1315
1316 udf_debug("Multi-session=%d\n", UDF_SB_SESSION(sb));
1317
1318 if ( uopt.lastblock == 0xFFFFFFFF )
1319 UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
1320 else
1321 UDF_SB_LASTBLOCK(sb) = uopt.lastblock;
1322
1323 UDF_SB_LASTBLOCK(sb) = udf_find_anchor(sb, uopt.anchor, UDF_SB_LASTBLOCK(sb));
1324
1325 udf_debug("Lastblock=%d\n", UDF_SB_LASTBLOCK(sb));
1326
1327 if (udf_check_valid(sb, uopt.novrs, silent)) /* read volume recognition sequences */
1328 {
1329 printk("UDF-fs: No VRS found\n");
1330 goto error_out;
1331 }
1332
1333 /* Fill in the rest of the superblock */
1334 sb->s_op = &udf_sb_ops;
1335 sb->dq_op = NULL;
1336 sb->s_dirt = 0;
1337 sb->s_magic = UDF_SUPER_MAGIC;
1338
1339 for (i=0; i<UDF_MAX_BLOCK_LOADED; i++)
1340 {
1341 UDF_SB_BLOCK_BITMAP_NUMBER(sb,i) = 0;
1342 UDF_SB_BLOCK_BITMAP(sb,i) = NULL;
1343 }
1344 UDF_SB_LOADED_BLOCK_BITMAPS(sb) = 0;
1345
1346 if (udf_load_partition(sb, &fileset))
1347 {
1348 printk("UDF-fs: No partition found (1)\n");
1349 goto error_out;
1350 }
1351
1352 if ( UDF_SB_LVIDBH(sb) )
1353 {
1354 Uint16 minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev);
1355 Uint16 minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev);
1356 /* Uint16 maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */
1357
1358 if (minUDFReadRev > UDF_MAX_READ_VERSION)
1359 {
1360 printk("UDF-fs: minUDFReadRev=%x (max is %x)\n",
1361 UDF_SB_LVIDIU(sb)->minUDFReadRev, UDF_MAX_READ_VERSION);
1362 goto error_out;
1363 }
1364 else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1365 {
1366 sb->s_flags |= MS_RDONLY;
1367 }
1368
1369 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1370 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1371 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1372 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1373 }
1374
1375 if ( !UDF_SB_NUMPARTS(sb) )
1376 {
1377 printk("UDF-fs: No partition found (2)\n");
1378 goto error_out;
1379 }
1380
1381 if ( udf_find_fileset(sb, &fileset, &rootdir) )
1382 {
1383 printk("UDF-fs: No fileset found\n");
1384 goto error_out;
1385 }
1386
1387 if (!silent)
1388 {
1389 timestamp ts;
1390 udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb), 0);
1391 udf_info("UDF %s (%s) Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1392 UDFFS_VERSION, UDFFS_DATE,
1393 UDF_SB_VOLIDENT(sb), ts.year, ts.month, ts.day, ts.hour, ts.minute,
1394 ts.typeAndTimezone);
1395 }
1396 if (!(sb->s_flags & MS_RDONLY))
1397 udf_open_lvid(sb);
1398
1399 /* Assign the root inode */
1400 /* assign inodes by physical block number */
1401 /* perhaps it's not extensible enough, but for now ... */
1402 inode = udf_iget(sb, rootdir);
1403 if (!inode)
1404 {
1405 printk("UDF-fs: Error in udf_iget, block=%d, partition=%d\n",
1406 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1407 goto error_out;
1408 }
1409
1410 /* Allocate a dentry for the root inode */
1411 sb->s_root = d_alloc_root(inode);
1412 if (!sb->s_root)
1413 {
1414 printk("UDF-fs: Couldn't allocate root dentry\n");
1415 iput(inode);
1416 goto error_out;
1417 }
1418
1419 return sb;
1420
1421 error_out:
1422 if (UDF_SB_VAT(sb))
1423 iput(UDF_SB_VAT(sb));
1424 if (!(sb->s_flags & MS_RDONLY))
1425 udf_close_lvid(sb);
1426 udf_release_data(UDF_SB_LVIDBH(sb));
1427 UDF_SB_FREE(sb);
1428 return NULL;
1429 }
1430
1431 void udf_error(struct super_block *sb, const char *function,
1432 const char *fmt, ...)
1433 {
1434 va_list args;
1435
1436 if (!(sb->s_flags & MS_RDONLY))
1437 {
1438 /* mark sb error */
1439 sb->s_dirt = 1;
1440 }
1441 va_start(args, fmt);
1442 vsprintf(error_buf, fmt, args);
1443 va_end(args);
1444 printk (KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
1445 bdevname(sb->s_dev), function, error_buf);
1446 }
1447
1448 void udf_warning(struct super_block *sb, const char *function,
1449 const char *fmt, ...)
1450 {
1451 va_list args;
1452
1453 va_start (args, fmt);
1454 vsprintf(error_buf, fmt, args);
1455 va_end(args);
1456 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
1457 bdevname(sb->s_dev), function, error_buf);
1458 }
1459
1460 /*
1461 * udf_put_super
1462 *
1463 * PURPOSE
1464 * Prepare for destruction of the superblock.
1465 *
1466 * DESCRIPTION
1467 * Called before the filesystem is unmounted.
1468 *
1469 * HISTORY
1470 * July 1, 1997 - Andrew E. Mileski
1471 * Written, tested, and released.
1472 */
1473 static void
1474 udf_put_super(struct super_block *sb)
1475 {
1476 int i;
1477
1478 if (UDF_SB_VAT(sb))
1479 iput(UDF_SB_VAT(sb));
1480 if (!(sb->s_flags & MS_RDONLY))
1481 udf_close_lvid(sb);
1482 udf_release_data(UDF_SB_LVIDBH(sb));
1483 for (i=0; i<UDF_MAX_BLOCK_LOADED; i++)
1484 udf_release_data(UDF_SB_BLOCK_BITMAP(sb, i));
1485 UDF_SB_FREE(sb);
1486 }
1487
1488 /*
1489 * udf_stat_fs
1490 *
1491 * PURPOSE
1492 * Return info about the filesystem.
1493 *
1494 * DESCRIPTION
1495 * Called by sys_statfs()
1496 *
1497 * HISTORY
1498 * July 1, 1997 - Andrew E. Mileski
1499 * Written, tested, and released.
1500 */
1501 static int
1502 udf_statfs(struct super_block *sb, struct statfs *buf)
1503 {
1504 buf->f_type = UDF_SUPER_MAGIC;
1505 buf->f_bsize = sb->s_blocksize;
1506 buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
1507 buf->f_bfree = udf_count_free(sb);
1508 buf->f_bavail = buf->f_bfree;
1509 buf->f_files = (UDF_SB_LVIDBH(sb) ?
1510 (le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) +
1511 le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree;
1512 buf->f_ffree = buf->f_bfree;
1513 /* __kernel_fsid_t f_fsid */
1514 buf->f_namelen = UDF_NAME_LEN;
1515
1516 return 0;
1517 }
1518
1519 static unsigned char udf_bitmap_lookup[16] = {
1520 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
1521 };
1522
1523 static unsigned int
1524 udf_count_free(struct super_block *sb)
1525 {
1526 struct buffer_head *bh = NULL;
1527 unsigned int accum = 0;
1528 lb_addr loc;
1529 Uint32 bitmap;
1530
1531 if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
1532 bitmap = UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.bitmap;
1533 else if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
1534 bitmap = UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.bitmap;
1535 else
1536 bitmap = 0xFFFFFFFF;
1537
1538 if (bitmap != 0xFFFFFFFF)
1539 {
1540 struct SpaceBitmapDesc *bm;
1541 int block = 0, newblock, index;
1542 Uint16 ident;
1543 Uint32 bytes;
1544 Uint8 value;
1545 Uint8 * ptr;
1546
1547 loc.logicalBlockNum = bitmap;
1548 loc.partitionReferenceNum = UDF_SB_PARTITION(sb);
1549 bh = udf_read_ptagged(sb, loc, 0, &ident);
1550
1551 if (!bh)
1552 {
1553 printk(KERN_ERR "udf: udf_count_free failed\n");
1554 return 0;
1555 }
1556 else if (ident != TID_SPACE_BITMAP_DESC)
1557 {
1558 udf_release_data(bh);
1559 printk(KERN_ERR "udf: udf_count_free failed\n");
1560 return 0;
1561 }
1562
1563 bm = (struct SpaceBitmapDesc *)bh->b_data;
1564 bytes = bm->numOfBytes;
1565 index = sizeof(struct SpaceBitmapDesc); /* offset in first block only */
1566 ptr = (Uint8 *)bh->b_data;
1567
1568 while ( bytes > 0 )
1569 {
1570 while ((bytes > 0) && (index < sb->s_blocksize))
1571 {
1572 value = ptr[index];
1573 accum += udf_bitmap_lookup[ value & 0x0f ];
1574 accum += udf_bitmap_lookup[ value >> 4 ];
1575 index++;
1576 bytes--;
1577 }
1578 if ( bytes )
1579 {
1580 udf_release_data(bh);
1581 newblock = udf_get_lb_pblock(sb, loc, ++block);
1582 bh = udf_tread(sb, newblock, sb->s_blocksize);
1583 if (!bh)
1584 {
1585 udf_debug("read failed\n");
1586 return accum;
1587 }
1588 index = 0;
1589 ptr = (Uint8 *)bh->b_data;
1590 }
1591 }
1592 udf_release_data(bh);
1593 }
1594 else
1595 {
1596 if (UDF_SB_LVIDBH(sb))
1597 {
1598 if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb))
1599 accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]);
1600
1601 if (accum == 0xFFFFFFFF)
1602 accum = 0;
1603 }
1604 }
1605
1606 return accum;
1607 }
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