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udf: improve error management in udf_CS0toUTF8()
[linux/fpc-iii.git] / fs / udf / super.c
blobc6a8f5f794439107ddad9ed4e639449a62586fe5
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 * COPYRIGHT
18 * This file is distributed under the terms of the GNU General Public
19 * License (GPL). Copies of the GPL can be obtained from:
20 * ftp://prep.ai.mit.edu/pub/gnu/GPL
21 * Each contributing author retains all rights to their own work.
22 *
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
26 *
27 * HISTORY
28 *
29 * 09/24/98 dgb changed to allow compiling outside of kernel, and
30 * added some debugging.
31 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
32 * 10/16/98 attempting some multi-session support
33 * 10/17/98 added freespace count for "df"
34 * 11/11/98 gr added novrs option
35 * 11/26/98 dgb added fileset,anchor mount options
36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
38 * 12/20/98 find the free space bitmap (if it exists)
39 */
40
41 #include "udfdecl.h"
42
43 #include <linux/blkdev.h>
44 #include <linux/slab.h>
45 #include <linux/kernel.h>
46 #include <linux/module.h>
47 #include <linux/parser.h>
48 #include <linux/stat.h>
49 #include <linux/cdrom.h>
50 #include <linux/nls.h>
51 #include <linux/vfs.h>
52 #include <linux/vmalloc.h>
53 #include <linux/errno.h>
54 #include <linux/mount.h>
55 #include <linux/seq_file.h>
56 #include <linux/bitmap.h>
57 #include <linux/crc-itu-t.h>
58 #include <linux/log2.h>
59 #include <asm/byteorder.h>
60
61 #include "udf_sb.h"
62 #include "udf_i.h"
63
64 #include <linux/init.h>
65 #include <linux/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 #define UDF_DEFAULT_BLOCKSIZE 2048
77
78 #define VSD_FIRST_SECTOR_OFFSET 32768
79 #define VSD_MAX_SECTOR_OFFSET 0x800000
80
81 enum { UDF_MAX_LINKS = 0xffff };
82
83 /* These are the "meat" - everything else is stuffing */
84 static int udf_fill_super(struct super_block *, void *, int);
85 static void udf_put_super(struct super_block *);
86 static int udf_sync_fs(struct super_block *, int);
87 static int udf_remount_fs(struct super_block *, int *, char *);
88 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
89 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
90 struct kernel_lb_addr *);
91 static void udf_load_fileset(struct super_block *, struct buffer_head *,
92 struct kernel_lb_addr *);
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 dentry *, struct kstatfs *);
97 static int udf_show_options(struct seq_file *, struct dentry *);
98
99 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
100 {
101 struct logicalVolIntegrityDesc *lvid;
102 unsigned int partnum;
103 unsigned int offset;
104
105 if (!UDF_SB(sb)->s_lvid_bh)
106 return NULL;
107 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
108 partnum = le32_to_cpu(lvid->numOfPartitions);
109 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
110 offsetof(struct logicalVolIntegrityDesc, impUse)) /
111 (2 * sizeof(uint32_t)) < partnum) {
112 udf_err(sb, "Logical volume integrity descriptor corrupted "
113 "(numOfPartitions = %u)!\n", partnum);
114 return NULL;
115 }
116 /* The offset is to skip freeSpaceTable and sizeTable arrays */
117 offset = partnum * 2 * sizeof(uint32_t);
118 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
119 }
120
121 /* UDF filesystem type */
122 static struct dentry *udf_mount(struct file_system_type *fs_type,
123 int flags, const char *dev_name, void *data)
124 {
125 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
126 }
127
128 static struct file_system_type udf_fstype = {
129 .owner = THIS_MODULE,
130 .name = "udf",
131 .mount = udf_mount,
132 .kill_sb = kill_block_super,
133 .fs_flags = FS_REQUIRES_DEV,
134 };
135 MODULE_ALIAS_FS("udf");
136
137 static struct kmem_cache *udf_inode_cachep;
138
139 static struct inode *udf_alloc_inode(struct super_block *sb)
140 {
141 struct udf_inode_info *ei;
142 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
143 if (!ei)
144 return NULL;
145
146 ei->i_unique = 0;
147 ei->i_lenExtents = 0;
148 ei->i_next_alloc_block = 0;
149 ei->i_next_alloc_goal = 0;
150 ei->i_strat4096 = 0;
151 init_rwsem(&ei->i_data_sem);
152 ei->cached_extent.lstart = -1;
153 spin_lock_init(&ei->i_extent_cache_lock);
154
155 return &ei->vfs_inode;
156 }
157
158 static void udf_i_callback(struct rcu_head *head)
159 {
160 struct inode *inode = container_of(head, struct inode, i_rcu);
161 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
162 }
163
164 static void udf_destroy_inode(struct inode *inode)
165 {
166 call_rcu(&inode->i_rcu, udf_i_callback);
167 }
168
169 static void init_once(void *foo)
170 {
171 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
172
173 ei->i_ext.i_data = NULL;
174 inode_init_once(&ei->vfs_inode);
175 }
176
177 static int __init init_inodecache(void)
178 {
179 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
180 sizeof(struct udf_inode_info),
181 0, (SLAB_RECLAIM_ACCOUNT |
182 SLAB_MEM_SPREAD),
183 init_once);
184 if (!udf_inode_cachep)
185 return -ENOMEM;
186 return 0;
187 }
188
189 static void destroy_inodecache(void)
190 {
191 /*
192 * Make sure all delayed rcu free inodes are flushed before we
193 * destroy cache.
194 */
195 rcu_barrier();
196 kmem_cache_destroy(udf_inode_cachep);
197 }
198
199 /* Superblock operations */
200 static const struct super_operations udf_sb_ops = {
201 .alloc_inode = udf_alloc_inode,
202 .destroy_inode = udf_destroy_inode,
203 .write_inode = udf_write_inode,
204 .evict_inode = udf_evict_inode,
205 .put_super = udf_put_super,
206 .sync_fs = udf_sync_fs,
207 .statfs = udf_statfs,
208 .remount_fs = udf_remount_fs,
209 .show_options = udf_show_options,
210 };
211
212 struct udf_options {
213 unsigned char novrs;
214 unsigned int blocksize;
215 unsigned int session;
216 unsigned int lastblock;
217 unsigned int anchor;
218 unsigned int volume;
219 unsigned short partition;
220 unsigned int fileset;
221 unsigned int rootdir;
222 unsigned int flags;
223 umode_t umask;
224 kgid_t gid;
225 kuid_t uid;
226 umode_t fmode;
227 umode_t dmode;
228 struct nls_table *nls_map;
229 };
230
231 static int __init init_udf_fs(void)
232 {
233 int err;
234
235 err = init_inodecache();
236 if (err)
237 goto out1;
238 err = register_filesystem(&udf_fstype);
239 if (err)
240 goto out;
241
242 return 0;
243
244 out:
245 destroy_inodecache();
246
247 out1:
248 return err;
249 }
250
251 static void __exit exit_udf_fs(void)
252 {
253 unregister_filesystem(&udf_fstype);
254 destroy_inodecache();
255 }
256
257 module_init(init_udf_fs)
258 module_exit(exit_udf_fs)
259
260 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
261 {
262 struct udf_sb_info *sbi = UDF_SB(sb);
263
264 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
265 GFP_KERNEL);
266 if (!sbi->s_partmaps) {
267 udf_err(sb, "Unable to allocate space for %d partition maps\n",
268 count);
269 sbi->s_partitions = 0;
270 return -ENOMEM;
271 }
272
273 sbi->s_partitions = count;
274 return 0;
275 }
276
277 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
278 {
279 int i;
280 int nr_groups = bitmap->s_nr_groups;
281 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
282 nr_groups);
283
284 for (i = 0; i < nr_groups; i++)
285 if (bitmap->s_block_bitmap[i])
286 brelse(bitmap->s_block_bitmap[i]);
287
288 if (size <= PAGE_SIZE)
289 kfree(bitmap);
290 else
291 vfree(bitmap);
292 }
293
294 static void udf_free_partition(struct udf_part_map *map)
295 {
296 int i;
297 struct udf_meta_data *mdata;
298
299 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
300 iput(map->s_uspace.s_table);
301 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
302 iput(map->s_fspace.s_table);
303 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
304 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
305 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
306 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
307 if (map->s_partition_type == UDF_SPARABLE_MAP15)
308 for (i = 0; i < 4; i++)
309 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
310 else if (map->s_partition_type == UDF_METADATA_MAP25) {
311 mdata = &map->s_type_specific.s_metadata;
312 iput(mdata->s_metadata_fe);
313 mdata->s_metadata_fe = NULL;
314
315 iput(mdata->s_mirror_fe);
316 mdata->s_mirror_fe = NULL;
317
318 iput(mdata->s_bitmap_fe);
319 mdata->s_bitmap_fe = NULL;
320 }
321 }
322
323 static void udf_sb_free_partitions(struct super_block *sb)
324 {
325 struct udf_sb_info *sbi = UDF_SB(sb);
326 int i;
327 if (sbi->s_partmaps == NULL)
328 return;
329 for (i = 0; i < sbi->s_partitions; i++)
330 udf_free_partition(&sbi->s_partmaps[i]);
331 kfree(sbi->s_partmaps);
332 sbi->s_partmaps = NULL;
333 }
334
335 static int udf_show_options(struct seq_file *seq, struct dentry *root)
336 {
337 struct super_block *sb = root->d_sb;
338 struct udf_sb_info *sbi = UDF_SB(sb);
339
340 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
341 seq_puts(seq, ",nostrict");
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
343 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
344 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
345 seq_puts(seq, ",unhide");
346 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
347 seq_puts(seq, ",undelete");
348 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
349 seq_puts(seq, ",noadinicb");
350 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
351 seq_puts(seq, ",shortad");
352 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
353 seq_puts(seq, ",uid=forget");
354 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
355 seq_puts(seq, ",uid=ignore");
356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
357 seq_puts(seq, ",gid=forget");
358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
359 seq_puts(seq, ",gid=ignore");
360 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
361 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
362 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
363 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
364 if (sbi->s_umask != 0)
365 seq_printf(seq, ",umask=%ho", sbi->s_umask);
366 if (sbi->s_fmode != UDF_INVALID_MODE)
367 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
368 if (sbi->s_dmode != UDF_INVALID_MODE)
369 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
370 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
371 seq_printf(seq, ",session=%u", sbi->s_session);
372 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
373 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
374 if (sbi->s_anchor != 0)
375 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
376 /*
377 * volume, partition, fileset and rootdir seem to be ignored
378 * currently
379 */
380 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
381 seq_puts(seq, ",utf8");
382 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
383 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
384
385 return 0;
386 }
387
388 /*
389 * udf_parse_options
390 *
391 * PURPOSE
392 * Parse mount options.
393 *
394 * DESCRIPTION
395 * The following mount options are supported:
396 *
397 * gid= Set the default group.
398 * umask= Set the default umask.
399 * mode= Set the default file permissions.
400 * dmode= Set the default directory permissions.
401 * uid= Set the default user.
402 * bs= Set the block size.
403 * unhide Show otherwise hidden files.
404 * undelete Show deleted files in lists.
405 * adinicb Embed data in the inode (default)
406 * noadinicb Don't embed data in the inode
407 * shortad Use short ad's
408 * longad Use long ad's (default)
409 * nostrict Unset strict conformance
410 * iocharset= Set the NLS character set
411 *
412 * The remaining are for debugging and disaster recovery:
413 *
414 * novrs Skip volume sequence recognition
415 *
416 * The following expect a offset from 0.
417 *
418 * session= Set the CDROM session (default= last session)
419 * anchor= Override standard anchor location. (default= 256)
420 * volume= Override the VolumeDesc location. (unused)
421 * partition= Override the PartitionDesc location. (unused)
422 * lastblock= Set the last block of the filesystem/
423 *
424 * The following expect a offset from the partition root.
425 *
426 * fileset= Override the fileset block location. (unused)
427 * rootdir= Override the root directory location. (unused)
428 * WARNING: overriding the rootdir to a non-directory may
429 * yield highly unpredictable results.
430 *
431 * PRE-CONDITIONS
432 * options Pointer to mount options string.
433 * uopts Pointer to mount options variable.
434 *
435 * POST-CONDITIONS
436 * <return> 1 Mount options parsed okay.
437 * <return> 0 Error parsing mount options.
438 *
439 * HISTORY
440 * July 1, 1997 - Andrew E. Mileski
441 * Written, tested, and released.
442 */
443
444 enum {
445 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
446 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
447 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
448 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
449 Opt_rootdir, Opt_utf8, Opt_iocharset,
450 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
451 Opt_fmode, Opt_dmode
452 };
453
454 static const match_table_t tokens = {
455 {Opt_novrs, "novrs"},
456 {Opt_nostrict, "nostrict"},
457 {Opt_bs, "bs=%u"},
458 {Opt_unhide, "unhide"},
459 {Opt_undelete, "undelete"},
460 {Opt_noadinicb, "noadinicb"},
461 {Opt_adinicb, "adinicb"},
462 {Opt_shortad, "shortad"},
463 {Opt_longad, "longad"},
464 {Opt_uforget, "uid=forget"},
465 {Opt_uignore, "uid=ignore"},
466 {Opt_gforget, "gid=forget"},
467 {Opt_gignore, "gid=ignore"},
468 {Opt_gid, "gid=%u"},
469 {Opt_uid, "uid=%u"},
470 {Opt_umask, "umask=%o"},
471 {Opt_session, "session=%u"},
472 {Opt_lastblock, "lastblock=%u"},
473 {Opt_anchor, "anchor=%u"},
474 {Opt_volume, "volume=%u"},
475 {Opt_partition, "partition=%u"},
476 {Opt_fileset, "fileset=%u"},
477 {Opt_rootdir, "rootdir=%u"},
478 {Opt_utf8, "utf8"},
479 {Opt_iocharset, "iocharset=%s"},
480 {Opt_fmode, "mode=%o"},
481 {Opt_dmode, "dmode=%o"},
482 {Opt_err, NULL}
483 };
484
485 static int udf_parse_options(char *options, struct udf_options *uopt,
486 bool remount)
487 {
488 char *p;
489 int option;
490
491 uopt->novrs = 0;
492 uopt->partition = 0xFFFF;
493 uopt->session = 0xFFFFFFFF;
494 uopt->lastblock = 0;
495 uopt->anchor = 0;
496 uopt->volume = 0xFFFFFFFF;
497 uopt->rootdir = 0xFFFFFFFF;
498 uopt->fileset = 0xFFFFFFFF;
499 uopt->nls_map = NULL;
500
501 if (!options)
502 return 1;
503
504 while ((p = strsep(&options, ",")) != NULL) {
505 substring_t args[MAX_OPT_ARGS];
506 int token;
507 unsigned n;
508 if (!*p)
509 continue;
510
511 token = match_token(p, tokens, args);
512 switch (token) {
513 case Opt_novrs:
514 uopt->novrs = 1;
515 break;
516 case Opt_bs:
517 if (match_int(&args[0], &option))
518 return 0;
519 n = option;
520 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
521 return 0;
522 uopt->blocksize = n;
523 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
524 break;
525 case Opt_unhide:
526 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
527 break;
528 case Opt_undelete:
529 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
530 break;
531 case Opt_noadinicb:
532 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
533 break;
534 case Opt_adinicb:
535 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
536 break;
537 case Opt_shortad:
538 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
539 break;
540 case Opt_longad:
541 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
542 break;
543 case Opt_gid:
544 if (match_int(args, &option))
545 return 0;
546 uopt->gid = make_kgid(current_user_ns(), option);
547 if (!gid_valid(uopt->gid))
548 return 0;
549 uopt->flags |= (1 << UDF_FLAG_GID_SET);
550 break;
551 case Opt_uid:
552 if (match_int(args, &option))
553 return 0;
554 uopt->uid = make_kuid(current_user_ns(), option);
555 if (!uid_valid(uopt->uid))
556 return 0;
557 uopt->flags |= (1 << UDF_FLAG_UID_SET);
558 break;
559 case Opt_umask:
560 if (match_octal(args, &option))
561 return 0;
562 uopt->umask = option;
563 break;
564 case Opt_nostrict:
565 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
566 break;
567 case Opt_session:
568 if (match_int(args, &option))
569 return 0;
570 uopt->session = option;
571 if (!remount)
572 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
573 break;
574 case Opt_lastblock:
575 if (match_int(args, &option))
576 return 0;
577 uopt->lastblock = option;
578 if (!remount)
579 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
580 break;
581 case Opt_anchor:
582 if (match_int(args, &option))
583 return 0;
584 uopt->anchor = option;
585 break;
586 case Opt_volume:
587 if (match_int(args, &option))
588 return 0;
589 uopt->volume = option;
590 break;
591 case Opt_partition:
592 if (match_int(args, &option))
593 return 0;
594 uopt->partition = option;
595 break;
596 case Opt_fileset:
597 if (match_int(args, &option))
598 return 0;
599 uopt->fileset = option;
600 break;
601 case Opt_rootdir:
602 if (match_int(args, &option))
603 return 0;
604 uopt->rootdir = option;
605 break;
606 case Opt_utf8:
607 uopt->flags |= (1 << UDF_FLAG_UTF8);
608 break;
609 #ifdef CONFIG_UDF_NLS
610 case Opt_iocharset:
611 uopt->nls_map = load_nls(args[0].from);
612 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
613 break;
614 #endif
615 case Opt_uignore:
616 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
617 break;
618 case Opt_uforget:
619 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
620 break;
621 case Opt_gignore:
622 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
623 break;
624 case Opt_gforget:
625 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
626 break;
627 case Opt_fmode:
628 if (match_octal(args, &option))
629 return 0;
630 uopt->fmode = option & 0777;
631 break;
632 case Opt_dmode:
633 if (match_octal(args, &option))
634 return 0;
635 uopt->dmode = option & 0777;
636 break;
637 default:
638 pr_err("bad mount option \"%s\" or missing value\n", p);
639 return 0;
640 }
641 }
642 return 1;
643 }
644
645 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
646 {
647 struct udf_options uopt;
648 struct udf_sb_info *sbi = UDF_SB(sb);
649 int error = 0;
650 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
651
652 sync_filesystem(sb);
653 if (lvidiu) {
654 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
655 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
656 return -EACCES;
657 }
658
659 uopt.flags = sbi->s_flags;
660 uopt.uid = sbi->s_uid;
661 uopt.gid = sbi->s_gid;
662 uopt.umask = sbi->s_umask;
663 uopt.fmode = sbi->s_fmode;
664 uopt.dmode = sbi->s_dmode;
665
666 if (!udf_parse_options(options, &uopt, true))
667 return -EINVAL;
668
669 write_lock(&sbi->s_cred_lock);
670 sbi->s_flags = uopt.flags;
671 sbi->s_uid = uopt.uid;
672 sbi->s_gid = uopt.gid;
673 sbi->s_umask = uopt.umask;
674 sbi->s_fmode = uopt.fmode;
675 sbi->s_dmode = uopt.dmode;
676 write_unlock(&sbi->s_cred_lock);
677
678 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
679 goto out_unlock;
680
681 if (*flags & MS_RDONLY)
682 udf_close_lvid(sb);
683 else
684 udf_open_lvid(sb);
685
686 out_unlock:
687 return error;
688 }
689
690 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
691 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
692 static loff_t udf_check_vsd(struct super_block *sb)
693 {
694 struct volStructDesc *vsd = NULL;
695 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
696 int sectorsize;
697 struct buffer_head *bh = NULL;
698 int nsr02 = 0;
699 int nsr03 = 0;
700 struct udf_sb_info *sbi;
701
702 sbi = UDF_SB(sb);
703 if (sb->s_blocksize < sizeof(struct volStructDesc))
704 sectorsize = sizeof(struct volStructDesc);
705 else
706 sectorsize = sb->s_blocksize;
707
708 sector += (sbi->s_session << sb->s_blocksize_bits);
709
710 udf_debug("Starting at sector %u (%ld byte sectors)\n",
711 (unsigned int)(sector >> sb->s_blocksize_bits),
712 sb->s_blocksize);
713 /* Process the sequence (if applicable). The hard limit on the sector
714 * offset is arbitrary, hopefully large enough so that all valid UDF
715 * filesystems will be recognised. There is no mention of an upper
716 * bound to the size of the volume recognition area in the standard.
717 * The limit will prevent the code to read all the sectors of a
718 * specially crafted image (like a bluray disc full of CD001 sectors),
719 * potentially causing minutes or even hours of uninterruptible I/O
720 * activity. This actually happened with uninitialised SSD partitions
721 * (all 0xFF) before the check for the limit and all valid IDs were
722 * added */
723 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
724 sector += sectorsize) {
725 /* Read a block */
726 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
727 if (!bh)
728 break;
729
730 /* Look for ISO descriptors */
731 vsd = (struct volStructDesc *)(bh->b_data +
732 (sector & (sb->s_blocksize - 1)));
733
734 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
735 VSD_STD_ID_LEN)) {
736 switch (vsd->structType) {
737 case 0:
738 udf_debug("ISO9660 Boot Record found\n");
739 break;
740 case 1:
741 udf_debug("ISO9660 Primary Volume Descriptor found\n");
742 break;
743 case 2:
744 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
745 break;
746 case 3:
747 udf_debug("ISO9660 Volume Partition Descriptor found\n");
748 break;
749 case 255:
750 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
751 break;
752 default:
753 udf_debug("ISO9660 VRS (%u) found\n",
754 vsd->structType);
755 break;
756 }
757 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
758 VSD_STD_ID_LEN))
759 ; /* nothing */
760 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
761 VSD_STD_ID_LEN)) {
762 brelse(bh);
763 break;
764 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
765 VSD_STD_ID_LEN))
766 nsr02 = sector;
767 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
768 VSD_STD_ID_LEN))
769 nsr03 = sector;
770 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
771 VSD_STD_ID_LEN))
772 ; /* nothing */
773 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
774 VSD_STD_ID_LEN))
775 ; /* nothing */
776 else {
777 /* invalid id : end of volume recognition area */
778 brelse(bh);
779 break;
780 }
781 brelse(bh);
782 }
783
784 if (nsr03)
785 return nsr03;
786 else if (nsr02)
787 return nsr02;
788 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
789 VSD_FIRST_SECTOR_OFFSET)
790 return -1;
791 else
792 return 0;
793 }
794
795 static int udf_find_fileset(struct super_block *sb,
796 struct kernel_lb_addr *fileset,
797 struct kernel_lb_addr *root)
798 {
799 struct buffer_head *bh = NULL;
800 long lastblock;
801 uint16_t ident;
802 struct udf_sb_info *sbi;
803
804 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
805 fileset->partitionReferenceNum != 0xFFFF) {
806 bh = udf_read_ptagged(sb, fileset, 0, &ident);
807
808 if (!bh) {
809 return 1;
810 } else if (ident != TAG_IDENT_FSD) {
811 brelse(bh);
812 return 1;
813 }
814
815 }
816
817 sbi = UDF_SB(sb);
818 if (!bh) {
819 /* Search backwards through the partitions */
820 struct kernel_lb_addr newfileset;
821
822 /* --> cvg: FIXME - is it reasonable? */
823 return 1;
824
825 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
826 (newfileset.partitionReferenceNum != 0xFFFF &&
827 fileset->logicalBlockNum == 0xFFFFFFFF &&
828 fileset->partitionReferenceNum == 0xFFFF);
829 newfileset.partitionReferenceNum--) {
830 lastblock = sbi->s_partmaps
831 [newfileset.partitionReferenceNum]
832 .s_partition_len;
833 newfileset.logicalBlockNum = 0;
834
835 do {
836 bh = udf_read_ptagged(sb, &newfileset, 0,
837 &ident);
838 if (!bh) {
839 newfileset.logicalBlockNum++;
840 continue;
841 }
842
843 switch (ident) {
844 case TAG_IDENT_SBD:
845 {
846 struct spaceBitmapDesc *sp;
847 sp = (struct spaceBitmapDesc *)
848 bh->b_data;
849 newfileset.logicalBlockNum += 1 +
850 ((le32_to_cpu(sp->numOfBytes) +
851 sizeof(struct spaceBitmapDesc)
852 - 1) >> sb->s_blocksize_bits);
853 brelse(bh);
854 break;
855 }
856 case TAG_IDENT_FSD:
857 *fileset = newfileset;
858 break;
859 default:
860 newfileset.logicalBlockNum++;
861 brelse(bh);
862 bh = NULL;
863 break;
864 }
865 } while (newfileset.logicalBlockNum < lastblock &&
866 fileset->logicalBlockNum == 0xFFFFFFFF &&
867 fileset->partitionReferenceNum == 0xFFFF);
868 }
869 }
870
871 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
872 fileset->partitionReferenceNum != 0xFFFF) && bh) {
873 udf_debug("Fileset at block=%d, partition=%d\n",
874 fileset->logicalBlockNum,
875 fileset->partitionReferenceNum);
876
877 sbi->s_partition = fileset->partitionReferenceNum;
878 udf_load_fileset(sb, bh, root);
879 brelse(bh);
880 return 0;
881 }
882 return 1;
883 }
884
885 /*
886 * Load primary Volume Descriptor Sequence
887 *
888 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
889 * should be tried.
890 */
891 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
892 {
893 struct primaryVolDesc *pvoldesc;
894 struct ustr *instr, *outstr;
895 struct buffer_head *bh;
896 uint16_t ident;
897 int ret = -ENOMEM;
898
899 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
900 if (!instr)
901 return -ENOMEM;
902
903 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
904 if (!outstr)
905 goto out1;
906
907 bh = udf_read_tagged(sb, block, block, &ident);
908 if (!bh) {
909 ret = -EAGAIN;
910 goto out2;
911 }
912
913 if (ident != TAG_IDENT_PVD) {
914 ret = -EIO;
915 goto out_bh;
916 }
917
918 pvoldesc = (struct primaryVolDesc *)bh->b_data;
919
920 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
921 pvoldesc->recordingDateAndTime)) {
922 #ifdef UDFFS_DEBUG
923 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
924 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
925 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
926 ts->minute, le16_to_cpu(ts->typeAndTimezone));
927 #endif
928 }
929
930 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) {
931 ret = udf_CS0toUTF8(outstr, instr);
932 if (ret < 0)
933 goto out_bh;
934
935 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
936 outstr->u_len > 31 ? 31 : outstr->u_len);
937 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
938 }
939
940 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
941 ret = udf_CS0toUTF8(outstr, instr);
942 if (ret < 0)
943 goto out_bh;
944
945 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
946
947 ret = 0;
948 out_bh:
949 brelse(bh);
950 out2:
951 kfree(outstr);
952 out1:
953 kfree(instr);
954 return ret;
955 }
956
957 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
958 u32 meta_file_loc, u32 partition_num)
959 {
960 struct kernel_lb_addr addr;
961 struct inode *metadata_fe;
962
963 addr.logicalBlockNum = meta_file_loc;
964 addr.partitionReferenceNum = partition_num;
965
966 metadata_fe = udf_iget_special(sb, &addr);
967
968 if (IS_ERR(metadata_fe)) {
969 udf_warn(sb, "metadata inode efe not found\n");
970 return metadata_fe;
971 }
972 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
973 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
974 iput(metadata_fe);
975 return ERR_PTR(-EIO);
976 }
977
978 return metadata_fe;
979 }
980
981 static int udf_load_metadata_files(struct super_block *sb, int partition)
982 {
983 struct udf_sb_info *sbi = UDF_SB(sb);
984 struct udf_part_map *map;
985 struct udf_meta_data *mdata;
986 struct kernel_lb_addr addr;
987 struct inode *fe;
988
989 map = &sbi->s_partmaps[partition];
990 mdata = &map->s_type_specific.s_metadata;
991
992 /* metadata address */
993 udf_debug("Metadata file location: block = %d part = %d\n",
994 mdata->s_meta_file_loc, map->s_partition_num);
995
996 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
997 map->s_partition_num);
998 if (IS_ERR(fe)) {
999 /* mirror file entry */
1000 udf_debug("Mirror metadata file location: block = %d part = %d\n",
1001 mdata->s_mirror_file_loc, map->s_partition_num);
1002
1003 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
1004 map->s_partition_num);
1005
1006 if (IS_ERR(fe)) {
1007 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
1008 return PTR_ERR(fe);
1009 }
1010 mdata->s_mirror_fe = fe;
1011 } else
1012 mdata->s_metadata_fe = fe;
1013
1014
1015 /*
1016 * bitmap file entry
1017 * Note:
1018 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1019 */
1020 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1021 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1022 addr.partitionReferenceNum = map->s_partition_num;
1023
1024 udf_debug("Bitmap file location: block = %d part = %d\n",
1025 addr.logicalBlockNum, addr.partitionReferenceNum);
1026
1027 fe = udf_iget_special(sb, &addr);
1028 if (IS_ERR(fe)) {
1029 if (sb->s_flags & MS_RDONLY)
1030 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1031 else {
1032 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
1033 return PTR_ERR(fe);
1034 }
1035 } else
1036 mdata->s_bitmap_fe = fe;
1037 }
1038
1039 udf_debug("udf_load_metadata_files Ok\n");
1040 return 0;
1041 }
1042
1043 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1044 struct kernel_lb_addr *root)
1045 {
1046 struct fileSetDesc *fset;
1047
1048 fset = (struct fileSetDesc *)bh->b_data;
1049
1050 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1051
1052 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1053
1054 udf_debug("Rootdir at block=%d, partition=%d\n",
1055 root->logicalBlockNum, root->partitionReferenceNum);
1056 }
1057
1058 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1059 {
1060 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1061 return DIV_ROUND_UP(map->s_partition_len +
1062 (sizeof(struct spaceBitmapDesc) << 3),
1063 sb->s_blocksize * 8);
1064 }
1065
1066 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1067 {
1068 struct udf_bitmap *bitmap;
1069 int nr_groups;
1070 int size;
1071
1072 nr_groups = udf_compute_nr_groups(sb, index);
1073 size = sizeof(struct udf_bitmap) +
1074 (sizeof(struct buffer_head *) * nr_groups);
1075
1076 if (size <= PAGE_SIZE)
1077 bitmap = kzalloc(size, GFP_KERNEL);
1078 else
1079 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1080
1081 if (bitmap == NULL)
1082 return NULL;
1083
1084 bitmap->s_nr_groups = nr_groups;
1085 return bitmap;
1086 }
1087
1088 static int udf_fill_partdesc_info(struct super_block *sb,
1089 struct partitionDesc *p, int p_index)
1090 {
1091 struct udf_part_map *map;
1092 struct udf_sb_info *sbi = UDF_SB(sb);
1093 struct partitionHeaderDesc *phd;
1094
1095 map = &sbi->s_partmaps[p_index];
1096
1097 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1098 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1099
1100 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1101 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1102 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1103 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1104 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1105 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1106 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1107 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1108
1109 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1110 p_index, map->s_partition_type,
1111 map->s_partition_root, map->s_partition_len);
1112
1113 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1114 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1115 return 0;
1116
1117 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1118 if (phd->unallocSpaceTable.extLength) {
1119 struct kernel_lb_addr loc = {
1120 .logicalBlockNum = le32_to_cpu(
1121 phd->unallocSpaceTable.extPosition),
1122 .partitionReferenceNum = p_index,
1123 };
1124 struct inode *inode;
1125
1126 inode = udf_iget_special(sb, &loc);
1127 if (IS_ERR(inode)) {
1128 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1129 p_index);
1130 return PTR_ERR(inode);
1131 }
1132 map->s_uspace.s_table = inode;
1133 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1134 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1135 p_index, map->s_uspace.s_table->i_ino);
1136 }
1137
1138 if (phd->unallocSpaceBitmap.extLength) {
1139 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1140 if (!bitmap)
1141 return -ENOMEM;
1142 map->s_uspace.s_bitmap = bitmap;
1143 bitmap->s_extPosition = le32_to_cpu(
1144 phd->unallocSpaceBitmap.extPosition);
1145 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1146 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1147 p_index, bitmap->s_extPosition);
1148 }
1149
1150 if (phd->partitionIntegrityTable.extLength)
1151 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1152
1153 if (phd->freedSpaceTable.extLength) {
1154 struct kernel_lb_addr loc = {
1155 .logicalBlockNum = le32_to_cpu(
1156 phd->freedSpaceTable.extPosition),
1157 .partitionReferenceNum = p_index,
1158 };
1159 struct inode *inode;
1160
1161 inode = udf_iget_special(sb, &loc);
1162 if (IS_ERR(inode)) {
1163 udf_debug("cannot load freedSpaceTable (part %d)\n",
1164 p_index);
1165 return PTR_ERR(inode);
1166 }
1167 map->s_fspace.s_table = inode;
1168 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1169 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1170 p_index, map->s_fspace.s_table->i_ino);
1171 }
1172
1173 if (phd->freedSpaceBitmap.extLength) {
1174 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1175 if (!bitmap)
1176 return -ENOMEM;
1177 map->s_fspace.s_bitmap = bitmap;
1178 bitmap->s_extPosition = le32_to_cpu(
1179 phd->freedSpaceBitmap.extPosition);
1180 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1181 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1182 p_index, bitmap->s_extPosition);
1183 }
1184 return 0;
1185 }
1186
1187 static void udf_find_vat_block(struct super_block *sb, int p_index,
1188 int type1_index, sector_t start_block)
1189 {
1190 struct udf_sb_info *sbi = UDF_SB(sb);
1191 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1192 sector_t vat_block;
1193 struct kernel_lb_addr ino;
1194 struct inode *inode;
1195
1196 /*
1197 * VAT file entry is in the last recorded block. Some broken disks have
1198 * it a few blocks before so try a bit harder...
1199 */
1200 ino.partitionReferenceNum = type1_index;
1201 for (vat_block = start_block;
1202 vat_block >= map->s_partition_root &&
1203 vat_block >= start_block - 3; vat_block--) {
1204 ino.logicalBlockNum = vat_block - map->s_partition_root;
1205 inode = udf_iget_special(sb, &ino);
1206 if (!IS_ERR(inode)) {
1207 sbi->s_vat_inode = inode;
1208 break;
1209 }
1210 }
1211 }
1212
1213 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1214 {
1215 struct udf_sb_info *sbi = UDF_SB(sb);
1216 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1217 struct buffer_head *bh = NULL;
1218 struct udf_inode_info *vati;
1219 uint32_t pos;
1220 struct virtualAllocationTable20 *vat20;
1221 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1222
1223 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1224 if (!sbi->s_vat_inode &&
1225 sbi->s_last_block != blocks - 1) {
1226 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1227 (unsigned long)sbi->s_last_block,
1228 (unsigned long)blocks - 1);
1229 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1230 }
1231 if (!sbi->s_vat_inode)
1232 return -EIO;
1233
1234 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1235 map->s_type_specific.s_virtual.s_start_offset = 0;
1236 map->s_type_specific.s_virtual.s_num_entries =
1237 (sbi->s_vat_inode->i_size - 36) >> 2;
1238 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1239 vati = UDF_I(sbi->s_vat_inode);
1240 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1241 pos = udf_block_map(sbi->s_vat_inode, 0);
1242 bh = sb_bread(sb, pos);
1243 if (!bh)
1244 return -EIO;
1245 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1246 } else {
1247 vat20 = (struct virtualAllocationTable20 *)
1248 vati->i_ext.i_data;
1249 }
1250
1251 map->s_type_specific.s_virtual.s_start_offset =
1252 le16_to_cpu(vat20->lengthHeader);
1253 map->s_type_specific.s_virtual.s_num_entries =
1254 (sbi->s_vat_inode->i_size -
1255 map->s_type_specific.s_virtual.
1256 s_start_offset) >> 2;
1257 brelse(bh);
1258 }
1259 return 0;
1260 }
1261
1262 /*
1263 * Load partition descriptor block
1264 *
1265 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1266 * sequence.
1267 */
1268 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1269 {
1270 struct buffer_head *bh;
1271 struct partitionDesc *p;
1272 struct udf_part_map *map;
1273 struct udf_sb_info *sbi = UDF_SB(sb);
1274 int i, type1_idx;
1275 uint16_t partitionNumber;
1276 uint16_t ident;
1277 int ret;
1278
1279 bh = udf_read_tagged(sb, block, block, &ident);
1280 if (!bh)
1281 return -EAGAIN;
1282 if (ident != TAG_IDENT_PD) {
1283 ret = 0;
1284 goto out_bh;
1285 }
1286
1287 p = (struct partitionDesc *)bh->b_data;
1288 partitionNumber = le16_to_cpu(p->partitionNumber);
1289
1290 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1291 for (i = 0; i < sbi->s_partitions; i++) {
1292 map = &sbi->s_partmaps[i];
1293 udf_debug("Searching map: (%d == %d)\n",
1294 map->s_partition_num, partitionNumber);
1295 if (map->s_partition_num == partitionNumber &&
1296 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1297 map->s_partition_type == UDF_SPARABLE_MAP15))
1298 break;
1299 }
1300
1301 if (i >= sbi->s_partitions) {
1302 udf_debug("Partition (%d) not found in partition map\n",
1303 partitionNumber);
1304 ret = 0;
1305 goto out_bh;
1306 }
1307
1308 ret = udf_fill_partdesc_info(sb, p, i);
1309 if (ret < 0)
1310 goto out_bh;
1311
1312 /*
1313 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1314 * PHYSICAL partitions are already set up
1315 */
1316 type1_idx = i;
1317 #ifdef UDFFS_DEBUG
1318 map = NULL; /* supress 'maybe used uninitialized' warning */
1319 #endif
1320 for (i = 0; i < sbi->s_partitions; i++) {
1321 map = &sbi->s_partmaps[i];
1322
1323 if (map->s_partition_num == partitionNumber &&
1324 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1325 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1326 map->s_partition_type == UDF_METADATA_MAP25))
1327 break;
1328 }
1329
1330 if (i >= sbi->s_partitions) {
1331 ret = 0;
1332 goto out_bh;
1333 }
1334
1335 ret = udf_fill_partdesc_info(sb, p, i);
1336 if (ret < 0)
1337 goto out_bh;
1338
1339 if (map->s_partition_type == UDF_METADATA_MAP25) {
1340 ret = udf_load_metadata_files(sb, i);
1341 if (ret < 0) {
1342 udf_err(sb, "error loading MetaData partition map %d\n",
1343 i);
1344 goto out_bh;
1345 }
1346 } else {
1347 /*
1348 * If we have a partition with virtual map, we don't handle
1349 * writing to it (we overwrite blocks instead of relocating
1350 * them).
1351 */
1352 if (!(sb->s_flags & MS_RDONLY)) {
1353 ret = -EACCES;
1354 goto out_bh;
1355 }
1356 ret = udf_load_vat(sb, i, type1_idx);
1357 if (ret < 0)
1358 goto out_bh;
1359 }
1360 ret = 0;
1361 out_bh:
1362 /* In case loading failed, we handle cleanup in udf_fill_super */
1363 brelse(bh);
1364 return ret;
1365 }
1366
1367 static int udf_load_sparable_map(struct super_block *sb,
1368 struct udf_part_map *map,
1369 struct sparablePartitionMap *spm)
1370 {
1371 uint32_t loc;
1372 uint16_t ident;
1373 struct sparingTable *st;
1374 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1375 int i;
1376 struct buffer_head *bh;
1377
1378 map->s_partition_type = UDF_SPARABLE_MAP15;
1379 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1380 if (!is_power_of_2(sdata->s_packet_len)) {
1381 udf_err(sb, "error loading logical volume descriptor: "
1382 "Invalid packet length %u\n",
1383 (unsigned)sdata->s_packet_len);
1384 return -EIO;
1385 }
1386 if (spm->numSparingTables > 4) {
1387 udf_err(sb, "error loading logical volume descriptor: "
1388 "Too many sparing tables (%d)\n",
1389 (int)spm->numSparingTables);
1390 return -EIO;
1391 }
1392
1393 for (i = 0; i < spm->numSparingTables; i++) {
1394 loc = le32_to_cpu(spm->locSparingTable[i]);
1395 bh = udf_read_tagged(sb, loc, loc, &ident);
1396 if (!bh)
1397 continue;
1398
1399 st = (struct sparingTable *)bh->b_data;
1400 if (ident != 0 ||
1401 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1402 strlen(UDF_ID_SPARING)) ||
1403 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1404 sb->s_blocksize) {
1405 brelse(bh);
1406 continue;
1407 }
1408
1409 sdata->s_spar_map[i] = bh;
1410 }
1411 map->s_partition_func = udf_get_pblock_spar15;
1412 return 0;
1413 }
1414
1415 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1416 struct kernel_lb_addr *fileset)
1417 {
1418 struct logicalVolDesc *lvd;
1419 int i, offset;
1420 uint8_t type;
1421 struct udf_sb_info *sbi = UDF_SB(sb);
1422 struct genericPartitionMap *gpm;
1423 uint16_t ident;
1424 struct buffer_head *bh;
1425 unsigned int table_len;
1426 int ret;
1427
1428 bh = udf_read_tagged(sb, block, block, &ident);
1429 if (!bh)
1430 return -EAGAIN;
1431 BUG_ON(ident != TAG_IDENT_LVD);
1432 lvd = (struct logicalVolDesc *)bh->b_data;
1433 table_len = le32_to_cpu(lvd->mapTableLength);
1434 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1435 udf_err(sb, "error loading logical volume descriptor: "
1436 "Partition table too long (%u > %lu)\n", table_len,
1437 sb->s_blocksize - sizeof(*lvd));
1438 ret = -EIO;
1439 goto out_bh;
1440 }
1441
1442 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1443 if (ret)
1444 goto out_bh;
1445
1446 for (i = 0, offset = 0;
1447 i < sbi->s_partitions && offset < table_len;
1448 i++, offset += gpm->partitionMapLength) {
1449 struct udf_part_map *map = &sbi->s_partmaps[i];
1450 gpm = (struct genericPartitionMap *)
1451 &(lvd->partitionMaps[offset]);
1452 type = gpm->partitionMapType;
1453 if (type == 1) {
1454 struct genericPartitionMap1 *gpm1 =
1455 (struct genericPartitionMap1 *)gpm;
1456 map->s_partition_type = UDF_TYPE1_MAP15;
1457 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1458 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1459 map->s_partition_func = NULL;
1460 } else if (type == 2) {
1461 struct udfPartitionMap2 *upm2 =
1462 (struct udfPartitionMap2 *)gpm;
1463 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1464 strlen(UDF_ID_VIRTUAL))) {
1465 u16 suf =
1466 le16_to_cpu(((__le16 *)upm2->partIdent.
1467 identSuffix)[0]);
1468 if (suf < 0x0200) {
1469 map->s_partition_type =
1470 UDF_VIRTUAL_MAP15;
1471 map->s_partition_func =
1472 udf_get_pblock_virt15;
1473 } else {
1474 map->s_partition_type =
1475 UDF_VIRTUAL_MAP20;
1476 map->s_partition_func =
1477 udf_get_pblock_virt20;
1478 }
1479 } else if (!strncmp(upm2->partIdent.ident,
1480 UDF_ID_SPARABLE,
1481 strlen(UDF_ID_SPARABLE))) {
1482 ret = udf_load_sparable_map(sb, map,
1483 (struct sparablePartitionMap *)gpm);
1484 if (ret < 0)
1485 goto out_bh;
1486 } else if (!strncmp(upm2->partIdent.ident,
1487 UDF_ID_METADATA,
1488 strlen(UDF_ID_METADATA))) {
1489 struct udf_meta_data *mdata =
1490 &map->s_type_specific.s_metadata;
1491 struct metadataPartitionMap *mdm =
1492 (struct metadataPartitionMap *)
1493 &(lvd->partitionMaps[offset]);
1494 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1495 i, type, UDF_ID_METADATA);
1496
1497 map->s_partition_type = UDF_METADATA_MAP25;
1498 map->s_partition_func = udf_get_pblock_meta25;
1499
1500 mdata->s_meta_file_loc =
1501 le32_to_cpu(mdm->metadataFileLoc);
1502 mdata->s_mirror_file_loc =
1503 le32_to_cpu(mdm->metadataMirrorFileLoc);
1504 mdata->s_bitmap_file_loc =
1505 le32_to_cpu(mdm->metadataBitmapFileLoc);
1506 mdata->s_alloc_unit_size =
1507 le32_to_cpu(mdm->allocUnitSize);
1508 mdata->s_align_unit_size =
1509 le16_to_cpu(mdm->alignUnitSize);
1510 if (mdm->flags & 0x01)
1511 mdata->s_flags |= MF_DUPLICATE_MD;
1512
1513 udf_debug("Metadata Ident suffix=0x%x\n",
1514 le16_to_cpu(*(__le16 *)
1515 mdm->partIdent.identSuffix));
1516 udf_debug("Metadata part num=%d\n",
1517 le16_to_cpu(mdm->partitionNum));
1518 udf_debug("Metadata part alloc unit size=%d\n",
1519 le32_to_cpu(mdm->allocUnitSize));
1520 udf_debug("Metadata file loc=%d\n",
1521 le32_to_cpu(mdm->metadataFileLoc));
1522 udf_debug("Mirror file loc=%d\n",
1523 le32_to_cpu(mdm->metadataMirrorFileLoc));
1524 udf_debug("Bitmap file loc=%d\n",
1525 le32_to_cpu(mdm->metadataBitmapFileLoc));
1526 udf_debug("Flags: %d %d\n",
1527 mdata->s_flags, mdm->flags);
1528 } else {
1529 udf_debug("Unknown ident: %s\n",
1530 upm2->partIdent.ident);
1531 continue;
1532 }
1533 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1534 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1535 }
1536 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1537 i, map->s_partition_num, type, map->s_volumeseqnum);
1538 }
1539
1540 if (fileset) {
1541 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1542
1543 *fileset = lelb_to_cpu(la->extLocation);
1544 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1545 fileset->logicalBlockNum,
1546 fileset->partitionReferenceNum);
1547 }
1548 if (lvd->integritySeqExt.extLength)
1549 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1550 ret = 0;
1551 out_bh:
1552 brelse(bh);
1553 return ret;
1554 }
1555
1556 /*
1557 * udf_load_logicalvolint
1558 *
1559 */
1560 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1561 {
1562 struct buffer_head *bh = NULL;
1563 uint16_t ident;
1564 struct udf_sb_info *sbi = UDF_SB(sb);
1565 struct logicalVolIntegrityDesc *lvid;
1566
1567 while (loc.extLength > 0 &&
1568 (bh = udf_read_tagged(sb, loc.extLocation,
1569 loc.extLocation, &ident)) &&
1570 ident == TAG_IDENT_LVID) {
1571 sbi->s_lvid_bh = bh;
1572 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1573
1574 if (lvid->nextIntegrityExt.extLength)
1575 udf_load_logicalvolint(sb,
1576 leea_to_cpu(lvid->nextIntegrityExt));
1577
1578 if (sbi->s_lvid_bh != bh)
1579 brelse(bh);
1580 loc.extLength -= sb->s_blocksize;
1581 loc.extLocation++;
1582 }
1583 if (sbi->s_lvid_bh != bh)
1584 brelse(bh);
1585 }
1586
1587 /*
1588 * Process a main/reserve volume descriptor sequence.
1589 * @block First block of first extent of the sequence.
1590 * @lastblock Lastblock of first extent of the sequence.
1591 * @fileset There we store extent containing root fileset
1592 *
1593 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1594 * sequence
1595 */
1596 static noinline int udf_process_sequence(
1597 struct super_block *sb,
1598 sector_t block, sector_t lastblock,
1599 struct kernel_lb_addr *fileset)
1600 {
1601 struct buffer_head *bh = NULL;
1602 struct udf_vds_record vds[VDS_POS_LENGTH];
1603 struct udf_vds_record *curr;
1604 struct generic_desc *gd;
1605 struct volDescPtr *vdp;
1606 bool done = false;
1607 uint32_t vdsn;
1608 uint16_t ident;
1609 long next_s = 0, next_e = 0;
1610 int ret;
1611
1612 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1613
1614 /*
1615 * Read the main descriptor sequence and find which descriptors
1616 * are in it.
1617 */
1618 for (; (!done && block <= lastblock); block++) {
1619
1620 bh = udf_read_tagged(sb, block, block, &ident);
1621 if (!bh) {
1622 udf_err(sb,
1623 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1624 (unsigned long long)block);
1625 return -EAGAIN;
1626 }
1627
1628 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1629 gd = (struct generic_desc *)bh->b_data;
1630 vdsn = le32_to_cpu(gd->volDescSeqNum);
1631 switch (ident) {
1632 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1633 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1634 if (vdsn >= curr->volDescSeqNum) {
1635 curr->volDescSeqNum = vdsn;
1636 curr->block = block;
1637 }
1638 break;
1639 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1640 curr = &vds[VDS_POS_VOL_DESC_PTR];
1641 if (vdsn >= curr->volDescSeqNum) {
1642 curr->volDescSeqNum = vdsn;
1643 curr->block = block;
1644
1645 vdp = (struct volDescPtr *)bh->b_data;
1646 next_s = le32_to_cpu(
1647 vdp->nextVolDescSeqExt.extLocation);
1648 next_e = le32_to_cpu(
1649 vdp->nextVolDescSeqExt.extLength);
1650 next_e = next_e >> sb->s_blocksize_bits;
1651 next_e += next_s;
1652 }
1653 break;
1654 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1655 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1656 if (vdsn >= curr->volDescSeqNum) {
1657 curr->volDescSeqNum = vdsn;
1658 curr->block = block;
1659 }
1660 break;
1661 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1662 curr = &vds[VDS_POS_PARTITION_DESC];
1663 if (!curr->block)
1664 curr->block = block;
1665 break;
1666 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1667 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1668 if (vdsn >= curr->volDescSeqNum) {
1669 curr->volDescSeqNum = vdsn;
1670 curr->block = block;
1671 }
1672 break;
1673 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1674 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1675 if (vdsn >= curr->volDescSeqNum) {
1676 curr->volDescSeqNum = vdsn;
1677 curr->block = block;
1678 }
1679 break;
1680 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1681 vds[VDS_POS_TERMINATING_DESC].block = block;
1682 if (next_e) {
1683 block = next_s;
1684 lastblock = next_e;
1685 next_s = next_e = 0;
1686 } else
1687 done = true;
1688 break;
1689 }
1690 brelse(bh);
1691 }
1692 /*
1693 * Now read interesting descriptors again and process them
1694 * in a suitable order
1695 */
1696 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1697 udf_err(sb, "Primary Volume Descriptor not found!\n");
1698 return -EAGAIN;
1699 }
1700 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1701 if (ret < 0)
1702 return ret;
1703
1704 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1705 ret = udf_load_logicalvol(sb,
1706 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1707 fileset);
1708 if (ret < 0)
1709 return ret;
1710 }
1711
1712 if (vds[VDS_POS_PARTITION_DESC].block) {
1713 /*
1714 * We rescan the whole descriptor sequence to find
1715 * partition descriptor blocks and process them.
1716 */
1717 for (block = vds[VDS_POS_PARTITION_DESC].block;
1718 block < vds[VDS_POS_TERMINATING_DESC].block;
1719 block++) {
1720 ret = udf_load_partdesc(sb, block);
1721 if (ret < 0)
1722 return ret;
1723 }
1724 }
1725
1726 return 0;
1727 }
1728
1729 /*
1730 * Load Volume Descriptor Sequence described by anchor in bh
1731 *
1732 * Returns <0 on error, 0 on success
1733 */
1734 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1735 struct kernel_lb_addr *fileset)
1736 {
1737 struct anchorVolDescPtr *anchor;
1738 sector_t main_s, main_e, reserve_s, reserve_e;
1739 int ret;
1740
1741 anchor = (struct anchorVolDescPtr *)bh->b_data;
1742
1743 /* Locate the main sequence */
1744 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1745 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1746 main_e = main_e >> sb->s_blocksize_bits;
1747 main_e += main_s;
1748
1749 /* Locate the reserve sequence */
1750 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1751 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1752 reserve_e = reserve_e >> sb->s_blocksize_bits;
1753 reserve_e += reserve_s;
1754
1755 /* Process the main & reserve sequences */
1756 /* responsible for finding the PartitionDesc(s) */
1757 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1758 if (ret != -EAGAIN)
1759 return ret;
1760 udf_sb_free_partitions(sb);
1761 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1762 if (ret < 0) {
1763 udf_sb_free_partitions(sb);
1764 /* No sequence was OK, return -EIO */
1765 if (ret == -EAGAIN)
1766 ret = -EIO;
1767 }
1768 return ret;
1769 }
1770
1771 /*
1772 * Check whether there is an anchor block in the given block and
1773 * load Volume Descriptor Sequence if so.
1774 *
1775 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1776 * block
1777 */
1778 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1779 struct kernel_lb_addr *fileset)
1780 {
1781 struct buffer_head *bh;
1782 uint16_t ident;
1783 int ret;
1784
1785 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1786 udf_fixed_to_variable(block) >=
1787 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1788 return -EAGAIN;
1789
1790 bh = udf_read_tagged(sb, block, block, &ident);
1791 if (!bh)
1792 return -EAGAIN;
1793 if (ident != TAG_IDENT_AVDP) {
1794 brelse(bh);
1795 return -EAGAIN;
1796 }
1797 ret = udf_load_sequence(sb, bh, fileset);
1798 brelse(bh);
1799 return ret;
1800 }
1801
1802 /*
1803 * Search for an anchor volume descriptor pointer.
1804 *
1805 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1806 * of anchors.
1807 */
1808 static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1809 struct kernel_lb_addr *fileset)
1810 {
1811 sector_t last[6];
1812 int i;
1813 struct udf_sb_info *sbi = UDF_SB(sb);
1814 int last_count = 0;
1815 int ret;
1816
1817 /* First try user provided anchor */
1818 if (sbi->s_anchor) {
1819 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1820 if (ret != -EAGAIN)
1821 return ret;
1822 }
1823 /*
1824 * according to spec, anchor is in either:
1825 * block 256
1826 * lastblock-256
1827 * lastblock
1828 * however, if the disc isn't closed, it could be 512.
1829 */
1830 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1831 if (ret != -EAGAIN)
1832 return ret;
1833 /*
1834 * The trouble is which block is the last one. Drives often misreport
1835 * this so we try various possibilities.
1836 */
1837 last[last_count++] = *lastblock;
1838 if (*lastblock >= 1)
1839 last[last_count++] = *lastblock - 1;
1840 last[last_count++] = *lastblock + 1;
1841 if (*lastblock >= 2)
1842 last[last_count++] = *lastblock - 2;
1843 if (*lastblock >= 150)
1844 last[last_count++] = *lastblock - 150;
1845 if (*lastblock >= 152)
1846 last[last_count++] = *lastblock - 152;
1847
1848 for (i = 0; i < last_count; i++) {
1849 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1850 sb->s_blocksize_bits)
1851 continue;
1852 ret = udf_check_anchor_block(sb, last[i], fileset);
1853 if (ret != -EAGAIN) {
1854 if (!ret)
1855 *lastblock = last[i];
1856 return ret;
1857 }
1858 if (last[i] < 256)
1859 continue;
1860 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1861 if (ret != -EAGAIN) {
1862 if (!ret)
1863 *lastblock = last[i];
1864 return ret;
1865 }
1866 }
1867
1868 /* Finally try block 512 in case media is open */
1869 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
1870 }
1871
1872 /*
1873 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1874 * area specified by it. The function expects sbi->s_lastblock to be the last
1875 * block on the media.
1876 *
1877 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1878 * was not found.
1879 */
1880 static int udf_find_anchor(struct super_block *sb,
1881 struct kernel_lb_addr *fileset)
1882 {
1883 struct udf_sb_info *sbi = UDF_SB(sb);
1884 sector_t lastblock = sbi->s_last_block;
1885 int ret;
1886
1887 ret = udf_scan_anchors(sb, &lastblock, fileset);
1888 if (ret != -EAGAIN)
1889 goto out;
1890
1891 /* No anchor found? Try VARCONV conversion of block numbers */
1892 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1893 lastblock = udf_variable_to_fixed(sbi->s_last_block);
1894 /* Firstly, we try to not convert number of the last block */
1895 ret = udf_scan_anchors(sb, &lastblock, fileset);
1896 if (ret != -EAGAIN)
1897 goto out;
1898
1899 lastblock = sbi->s_last_block;
1900 /* Secondly, we try with converted number of the last block */
1901 ret = udf_scan_anchors(sb, &lastblock, fileset);
1902 if (ret < 0) {
1903 /* VARCONV didn't help. Clear it. */
1904 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1905 }
1906 out:
1907 if (ret == 0)
1908 sbi->s_last_block = lastblock;
1909 return ret;
1910 }
1911
1912 /*
1913 * Check Volume Structure Descriptor, find Anchor block and load Volume
1914 * Descriptor Sequence.
1915 *
1916 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1917 * block was not found.
1918 */
1919 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1920 int silent, struct kernel_lb_addr *fileset)
1921 {
1922 struct udf_sb_info *sbi = UDF_SB(sb);
1923 loff_t nsr_off;
1924 int ret;
1925
1926 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1927 if (!silent)
1928 udf_warn(sb, "Bad block size\n");
1929 return -EINVAL;
1930 }
1931 sbi->s_last_block = uopt->lastblock;
1932 if (!uopt->novrs) {
1933 /* Check that it is NSR02 compliant */
1934 nsr_off = udf_check_vsd(sb);
1935 if (!nsr_off) {
1936 if (!silent)
1937 udf_warn(sb, "No VRS found\n");
1938 return 0;
1939 }
1940 if (nsr_off == -1)
1941 udf_debug("Failed to read sector at offset %d. "
1942 "Assuming open disc. Skipping validity "
1943 "check\n", VSD_FIRST_SECTOR_OFFSET);
1944 if (!sbi->s_last_block)
1945 sbi->s_last_block = udf_get_last_block(sb);
1946 } else {
1947 udf_debug("Validity check skipped because of novrs option\n");
1948 }
1949
1950 /* Look for anchor block and load Volume Descriptor Sequence */
1951 sbi->s_anchor = uopt->anchor;
1952 ret = udf_find_anchor(sb, fileset);
1953 if (ret < 0) {
1954 if (!silent && ret == -EAGAIN)
1955 udf_warn(sb, "No anchor found\n");
1956 return ret;
1957 }
1958 return 0;
1959 }
1960
1961 static void udf_open_lvid(struct super_block *sb)
1962 {
1963 struct udf_sb_info *sbi = UDF_SB(sb);
1964 struct buffer_head *bh = sbi->s_lvid_bh;
1965 struct logicalVolIntegrityDesc *lvid;
1966 struct logicalVolIntegrityDescImpUse *lvidiu;
1967
1968 if (!bh)
1969 return;
1970 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1971 lvidiu = udf_sb_lvidiu(sb);
1972 if (!lvidiu)
1973 return;
1974
1975 mutex_lock(&sbi->s_alloc_mutex);
1976 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1977 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1978 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1979 CURRENT_TIME);
1980 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1981
1982 lvid->descTag.descCRC = cpu_to_le16(
1983 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1984 le16_to_cpu(lvid->descTag.descCRCLength)));
1985
1986 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1987 mark_buffer_dirty(bh);
1988 sbi->s_lvid_dirty = 0;
1989 mutex_unlock(&sbi->s_alloc_mutex);
1990 /* Make opening of filesystem visible on the media immediately */
1991 sync_dirty_buffer(bh);
1992 }
1993
1994 static void udf_close_lvid(struct super_block *sb)
1995 {
1996 struct udf_sb_info *sbi = UDF_SB(sb);
1997 struct buffer_head *bh = sbi->s_lvid_bh;
1998 struct logicalVolIntegrityDesc *lvid;
1999 struct logicalVolIntegrityDescImpUse *lvidiu;
2000
2001 if (!bh)
2002 return;
2003 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2004 lvidiu = udf_sb_lvidiu(sb);
2005 if (!lvidiu)
2006 return;
2007
2008 mutex_lock(&sbi->s_alloc_mutex);
2009 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2010 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2011 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
2012 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2013 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2014 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2015 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2016 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2017 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2018 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2019
2020 lvid->descTag.descCRC = cpu_to_le16(
2021 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2022 le16_to_cpu(lvid->descTag.descCRCLength)));
2023
2024 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2025 /*
2026 * We set buffer uptodate unconditionally here to avoid spurious
2027 * warnings from mark_buffer_dirty() when previous EIO has marked
2028 * the buffer as !uptodate
2029 */
2030 set_buffer_uptodate(bh);
2031 mark_buffer_dirty(bh);
2032 sbi->s_lvid_dirty = 0;
2033 mutex_unlock(&sbi->s_alloc_mutex);
2034 /* Make closing of filesystem visible on the media immediately */
2035 sync_dirty_buffer(bh);
2036 }
2037
2038 u64 lvid_get_unique_id(struct super_block *sb)
2039 {
2040 struct buffer_head *bh;
2041 struct udf_sb_info *sbi = UDF_SB(sb);
2042 struct logicalVolIntegrityDesc *lvid;
2043 struct logicalVolHeaderDesc *lvhd;
2044 u64 uniqueID;
2045 u64 ret;
2046
2047 bh = sbi->s_lvid_bh;
2048 if (!bh)
2049 return 0;
2050
2051 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2052 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2053
2054 mutex_lock(&sbi->s_alloc_mutex);
2055 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2056 if (!(++uniqueID & 0xFFFFFFFF))
2057 uniqueID += 16;
2058 lvhd->uniqueID = cpu_to_le64(uniqueID);
2059 mutex_unlock(&sbi->s_alloc_mutex);
2060 mark_buffer_dirty(bh);
2061
2062 return ret;
2063 }
2064
2065 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2066 {
2067 int ret = -EINVAL;
2068 struct inode *inode = NULL;
2069 struct udf_options uopt;
2070 struct kernel_lb_addr rootdir, fileset;
2071 struct udf_sb_info *sbi;
2072
2073 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2074 uopt.uid = INVALID_UID;
2075 uopt.gid = INVALID_GID;
2076 uopt.umask = 0;
2077 uopt.fmode = UDF_INVALID_MODE;
2078 uopt.dmode = UDF_INVALID_MODE;
2079
2080 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
2081 if (!sbi)
2082 return -ENOMEM;
2083
2084 sb->s_fs_info = sbi;
2085
2086 mutex_init(&sbi->s_alloc_mutex);
2087
2088 if (!udf_parse_options((char *)options, &uopt, false))
2089 goto parse_options_failure;
2090
2091 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
2092 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
2093 udf_err(sb, "utf8 cannot be combined with iocharset\n");
2094 goto parse_options_failure;
2095 }
2096 #ifdef CONFIG_UDF_NLS
2097 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
2098 uopt.nls_map = load_nls_default();
2099 if (!uopt.nls_map)
2100 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2101 else
2102 udf_debug("Using default NLS map\n");
2103 }
2104 #endif
2105 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2106 uopt.flags |= (1 << UDF_FLAG_UTF8);
2107
2108 fileset.logicalBlockNum = 0xFFFFFFFF;
2109 fileset.partitionReferenceNum = 0xFFFF;
2110
2111 sbi->s_flags = uopt.flags;
2112 sbi->s_uid = uopt.uid;
2113 sbi->s_gid = uopt.gid;
2114 sbi->s_umask = uopt.umask;
2115 sbi->s_fmode = uopt.fmode;
2116 sbi->s_dmode = uopt.dmode;
2117 sbi->s_nls_map = uopt.nls_map;
2118 rwlock_init(&sbi->s_cred_lock);
2119
2120 if (uopt.session == 0xFFFFFFFF)
2121 sbi->s_session = udf_get_last_session(sb);
2122 else
2123 sbi->s_session = uopt.session;
2124
2125 udf_debug("Multi-session=%d\n", sbi->s_session);
2126
2127 /* Fill in the rest of the superblock */
2128 sb->s_op = &udf_sb_ops;
2129 sb->s_export_op = &udf_export_ops;
2130
2131 sb->s_magic = UDF_SUPER_MAGIC;
2132 sb->s_time_gran = 1000;
2133
2134 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2135 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2136 } else {
2137 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2138 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2139 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2140 if (!silent)
2141 pr_notice("Rescanning with blocksize %d\n",
2142 UDF_DEFAULT_BLOCKSIZE);
2143 brelse(sbi->s_lvid_bh);
2144 sbi->s_lvid_bh = NULL;
2145 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2146 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2147 }
2148 }
2149 if (ret < 0) {
2150 if (ret == -EAGAIN) {
2151 udf_warn(sb, "No partition found (1)\n");
2152 ret = -EINVAL;
2153 }
2154 goto error_out;
2155 }
2156
2157 udf_debug("Lastblock=%d\n", sbi->s_last_block);
2158
2159 if (sbi->s_lvid_bh) {
2160 struct logicalVolIntegrityDescImpUse *lvidiu =
2161 udf_sb_lvidiu(sb);
2162 uint16_t minUDFReadRev;
2163 uint16_t minUDFWriteRev;
2164
2165 if (!lvidiu) {
2166 ret = -EINVAL;
2167 goto error_out;
2168 }
2169 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2170 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2171 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2172 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2173 minUDFReadRev,
2174 UDF_MAX_READ_VERSION);
2175 ret = -EINVAL;
2176 goto error_out;
2177 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2178 !(sb->s_flags & MS_RDONLY)) {
2179 ret = -EACCES;
2180 goto error_out;
2181 }
2182
2183 sbi->s_udfrev = minUDFWriteRev;
2184
2185 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2186 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2187 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2188 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2189 }
2190
2191 if (!sbi->s_partitions) {
2192 udf_warn(sb, "No partition found (2)\n");
2193 ret = -EINVAL;
2194 goto error_out;
2195 }
2196
2197 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2198 UDF_PART_FLAG_READ_ONLY &&
2199 !(sb->s_flags & MS_RDONLY)) {
2200 ret = -EACCES;
2201 goto error_out;
2202 }
2203
2204 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2205 udf_warn(sb, "No fileset found\n");
2206 ret = -EINVAL;
2207 goto error_out;
2208 }
2209
2210 if (!silent) {
2211 struct timestamp ts;
2212 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2213 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2214 sbi->s_volume_ident,
2215 le16_to_cpu(ts.year), ts.month, ts.day,
2216 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2217 }
2218 if (!(sb->s_flags & MS_RDONLY))
2219 udf_open_lvid(sb);
2220
2221 /* Assign the root inode */
2222 /* assign inodes by physical block number */
2223 /* perhaps it's not extensible enough, but for now ... */
2224 inode = udf_iget(sb, &rootdir);
2225 if (IS_ERR(inode)) {
2226 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2227 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2228 ret = PTR_ERR(inode);
2229 goto error_out;
2230 }
2231
2232 /* Allocate a dentry for the root inode */
2233 sb->s_root = d_make_root(inode);
2234 if (!sb->s_root) {
2235 udf_err(sb, "Couldn't allocate root dentry\n");
2236 ret = -ENOMEM;
2237 goto error_out;
2238 }
2239 sb->s_maxbytes = MAX_LFS_FILESIZE;
2240 sb->s_max_links = UDF_MAX_LINKS;
2241 return 0;
2242
2243 error_out:
2244 iput(sbi->s_vat_inode);
2245 parse_options_failure:
2246 #ifdef CONFIG_UDF_NLS
2247 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2248 unload_nls(sbi->s_nls_map);
2249 #endif
2250 if (!(sb->s_flags & MS_RDONLY))
2251 udf_close_lvid(sb);
2252 brelse(sbi->s_lvid_bh);
2253 udf_sb_free_partitions(sb);
2254 kfree(sbi);
2255 sb->s_fs_info = NULL;
2256
2257 return ret;
2258 }
2259
2260 void _udf_err(struct super_block *sb, const char *function,
2261 const char *fmt, ...)
2262 {
2263 struct va_format vaf;
2264 va_list args;
2265
2266 va_start(args, fmt);
2267
2268 vaf.fmt = fmt;
2269 vaf.va = &args;
2270
2271 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2272
2273 va_end(args);
2274 }
2275
2276 void _udf_warn(struct super_block *sb, const char *function,
2277 const char *fmt, ...)
2278 {
2279 struct va_format vaf;
2280 va_list args;
2281
2282 va_start(args, fmt);
2283
2284 vaf.fmt = fmt;
2285 vaf.va = &args;
2286
2287 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2288
2289 va_end(args);
2290 }
2291
2292 static void udf_put_super(struct super_block *sb)
2293 {
2294 struct udf_sb_info *sbi;
2295
2296 sbi = UDF_SB(sb);
2297
2298 iput(sbi->s_vat_inode);
2299 #ifdef CONFIG_UDF_NLS
2300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2301 unload_nls(sbi->s_nls_map);
2302 #endif
2303 if (!(sb->s_flags & MS_RDONLY))
2304 udf_close_lvid(sb);
2305 brelse(sbi->s_lvid_bh);
2306 udf_sb_free_partitions(sb);
2307 mutex_destroy(&sbi->s_alloc_mutex);
2308 kfree(sb->s_fs_info);
2309 sb->s_fs_info = NULL;
2310 }
2311
2312 static int udf_sync_fs(struct super_block *sb, int wait)
2313 {
2314 struct udf_sb_info *sbi = UDF_SB(sb);
2315
2316 mutex_lock(&sbi->s_alloc_mutex);
2317 if (sbi->s_lvid_dirty) {
2318 /*
2319 * Blockdevice will be synced later so we don't have to submit
2320 * the buffer for IO
2321 */
2322 mark_buffer_dirty(sbi->s_lvid_bh);
2323 sbi->s_lvid_dirty = 0;
2324 }
2325 mutex_unlock(&sbi->s_alloc_mutex);
2326
2327 return 0;
2328 }
2329
2330 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2331 {
2332 struct super_block *sb = dentry->d_sb;
2333 struct udf_sb_info *sbi = UDF_SB(sb);
2334 struct logicalVolIntegrityDescImpUse *lvidiu;
2335 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2336
2337 lvidiu = udf_sb_lvidiu(sb);
2338 buf->f_type = UDF_SUPER_MAGIC;
2339 buf->f_bsize = sb->s_blocksize;
2340 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2341 buf->f_bfree = udf_count_free(sb);
2342 buf->f_bavail = buf->f_bfree;
2343 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2344 le32_to_cpu(lvidiu->numDirs)) : 0)
2345 + buf->f_bfree;
2346 buf->f_ffree = buf->f_bfree;
2347 buf->f_namelen = UDF_NAME_LEN - 2;
2348 buf->f_fsid.val[0] = (u32)id;
2349 buf->f_fsid.val[1] = (u32)(id >> 32);
2350
2351 return 0;
2352 }
2353
2354 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2355 struct udf_bitmap *bitmap)
2356 {
2357 struct buffer_head *bh = NULL;
2358 unsigned int accum = 0;
2359 int index;
2360 int block = 0, newblock;
2361 struct kernel_lb_addr loc;
2362 uint32_t bytes;
2363 uint8_t *ptr;
2364 uint16_t ident;
2365 struct spaceBitmapDesc *bm;
2366
2367 loc.logicalBlockNum = bitmap->s_extPosition;
2368 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2369 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2370
2371 if (!bh) {
2372 udf_err(sb, "udf_count_free failed\n");
2373 goto out;
2374 } else if (ident != TAG_IDENT_SBD) {
2375 brelse(bh);
2376 udf_err(sb, "udf_count_free failed\n");
2377 goto out;
2378 }
2379
2380 bm = (struct spaceBitmapDesc *)bh->b_data;
2381 bytes = le32_to_cpu(bm->numOfBytes);
2382 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2383 ptr = (uint8_t *)bh->b_data;
2384
2385 while (bytes > 0) {
2386 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2387 accum += bitmap_weight((const unsigned long *)(ptr + index),
2388 cur_bytes * 8);
2389 bytes -= cur_bytes;
2390 if (bytes) {
2391 brelse(bh);
2392 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2393 bh = udf_tread(sb, newblock);
2394 if (!bh) {
2395 udf_debug("read failed\n");
2396 goto out;
2397 }
2398 index = 0;
2399 ptr = (uint8_t *)bh->b_data;
2400 }
2401 }
2402 brelse(bh);
2403 out:
2404 return accum;
2405 }
2406
2407 static unsigned int udf_count_free_table(struct super_block *sb,
2408 struct inode *table)
2409 {
2410 unsigned int accum = 0;
2411 uint32_t elen;
2412 struct kernel_lb_addr eloc;
2413 int8_t etype;
2414 struct extent_position epos;
2415
2416 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2417 epos.block = UDF_I(table)->i_location;
2418 epos.offset = sizeof(struct unallocSpaceEntry);
2419 epos.bh = NULL;
2420
2421 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2422 accum += (elen >> table->i_sb->s_blocksize_bits);
2423
2424 brelse(epos.bh);
2425 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2426
2427 return accum;
2428 }
2429
2430 static unsigned int udf_count_free(struct super_block *sb)
2431 {
2432 unsigned int accum = 0;
2433 struct udf_sb_info *sbi;
2434 struct udf_part_map *map;
2435
2436 sbi = UDF_SB(sb);
2437 if (sbi->s_lvid_bh) {
2438 struct logicalVolIntegrityDesc *lvid =
2439 (struct logicalVolIntegrityDesc *)
2440 sbi->s_lvid_bh->b_data;
2441 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2442 accum = le32_to_cpu(
2443 lvid->freeSpaceTable[sbi->s_partition]);
2444 if (accum == 0xFFFFFFFF)
2445 accum = 0;
2446 }
2447 }
2448
2449 if (accum)
2450 return accum;
2451
2452 map = &sbi->s_partmaps[sbi->s_partition];
2453 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2454 accum += udf_count_free_bitmap(sb,
2455 map->s_uspace.s_bitmap);
2456 }
2457 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2458 accum += udf_count_free_bitmap(sb,
2459 map->s_fspace.s_bitmap);
2460 }
2461 if (accum)
2462 return accum;
2463
2464 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2465 accum += udf_count_free_table(sb,
2466 map->s_uspace.s_table);
2467 }
2468 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2469 accum += udf_count_free_table(sb,
2470 map->s_fspace.s_table);
2471 }
2472
2473 return accum;
2474 }
Linux with added FPC-III support