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udf: Rename udf_warning to udf_warn
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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/buffer_head.h>
52 #include <linux/vfs.h>
53 #include <linux/vmalloc.h>
54 #include <linux/errno.h>
55 #include <linux/mount.h>
56 #include <linux/seq_file.h>
57 #include <linux/bitmap.h>
58 #include <linux/crc-itu-t.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 <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 #define UDF_DEFAULT_BLOCKSIZE 2048
77
78 static char error_buf[1024];
79
80 /* These are the "meat" - everything else is stuffing */
81 static int udf_fill_super(struct super_block *, void *, int);
82 static void udf_put_super(struct super_block *);
83 static int udf_sync_fs(struct super_block *, int);
84 static int udf_remount_fs(struct super_block *, int *, char *);
85 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
86 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
87 struct kernel_lb_addr *);
88 static void udf_load_fileset(struct super_block *, struct buffer_head *,
89 struct kernel_lb_addr *);
90 static void udf_open_lvid(struct super_block *);
91 static void udf_close_lvid(struct super_block *);
92 static unsigned int udf_count_free(struct super_block *);
93 static int udf_statfs(struct dentry *, struct kstatfs *);
94 static int udf_show_options(struct seq_file *, struct vfsmount *);
95
96 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
97 {
98 struct logicalVolIntegrityDesc *lvid =
99 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
100 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
101 __u32 offset = number_of_partitions * 2 *
102 sizeof(uint32_t)/sizeof(uint8_t);
103 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
104 }
105
106 /* UDF filesystem type */
107 static struct dentry *udf_mount(struct file_system_type *fs_type,
108 int flags, const char *dev_name, void *data)
109 {
110 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
111 }
112
113 static struct file_system_type udf_fstype = {
114 .owner = THIS_MODULE,
115 .name = "udf",
116 .mount = udf_mount,
117 .kill_sb = kill_block_super,
118 .fs_flags = FS_REQUIRES_DEV,
119 };
120
121 static struct kmem_cache *udf_inode_cachep;
122
123 static struct inode *udf_alloc_inode(struct super_block *sb)
124 {
125 struct udf_inode_info *ei;
126 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
127 if (!ei)
128 return NULL;
129
130 ei->i_unique = 0;
131 ei->i_lenExtents = 0;
132 ei->i_next_alloc_block = 0;
133 ei->i_next_alloc_goal = 0;
134 ei->i_strat4096 = 0;
135 init_rwsem(&ei->i_data_sem);
136
137 return &ei->vfs_inode;
138 }
139
140 static void udf_i_callback(struct rcu_head *head)
141 {
142 struct inode *inode = container_of(head, struct inode, i_rcu);
143 INIT_LIST_HEAD(&inode->i_dentry);
144 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
145 }
146
147 static void udf_destroy_inode(struct inode *inode)
148 {
149 call_rcu(&inode->i_rcu, udf_i_callback);
150 }
151
152 static void init_once(void *foo)
153 {
154 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
155
156 ei->i_ext.i_data = NULL;
157 inode_init_once(&ei->vfs_inode);
158 }
159
160 static int init_inodecache(void)
161 {
162 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
163 sizeof(struct udf_inode_info),
164 0, (SLAB_RECLAIM_ACCOUNT |
165 SLAB_MEM_SPREAD),
166 init_once);
167 if (!udf_inode_cachep)
168 return -ENOMEM;
169 return 0;
170 }
171
172 static void destroy_inodecache(void)
173 {
174 kmem_cache_destroy(udf_inode_cachep);
175 }
176
177 /* Superblock operations */
178 static const struct super_operations udf_sb_ops = {
179 .alloc_inode = udf_alloc_inode,
180 .destroy_inode = udf_destroy_inode,
181 .write_inode = udf_write_inode,
182 .evict_inode = udf_evict_inode,
183 .put_super = udf_put_super,
184 .sync_fs = udf_sync_fs,
185 .statfs = udf_statfs,
186 .remount_fs = udf_remount_fs,
187 .show_options = udf_show_options,
188 };
189
190 struct udf_options {
191 unsigned char novrs;
192 unsigned int blocksize;
193 unsigned int session;
194 unsigned int lastblock;
195 unsigned int anchor;
196 unsigned int volume;
197 unsigned short partition;
198 unsigned int fileset;
199 unsigned int rootdir;
200 unsigned int flags;
201 mode_t umask;
202 gid_t gid;
203 uid_t uid;
204 mode_t fmode;
205 mode_t dmode;
206 struct nls_table *nls_map;
207 };
208
209 static int __init init_udf_fs(void)
210 {
211 int err;
212
213 err = init_inodecache();
214 if (err)
215 goto out1;
216 err = register_filesystem(&udf_fstype);
217 if (err)
218 goto out;
219
220 return 0;
221
222 out:
223 destroy_inodecache();
224
225 out1:
226 return err;
227 }
228
229 static void __exit exit_udf_fs(void)
230 {
231 unregister_filesystem(&udf_fstype);
232 destroy_inodecache();
233 }
234
235 module_init(init_udf_fs)
236 module_exit(exit_udf_fs)
237
238 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
239 {
240 struct udf_sb_info *sbi = UDF_SB(sb);
241
242 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
243 GFP_KERNEL);
244 if (!sbi->s_partmaps) {
245 udf_err(sb, "Unable to allocate space for %d partition maps\n",
246 count);
247 sbi->s_partitions = 0;
248 return -ENOMEM;
249 }
250
251 sbi->s_partitions = count;
252 return 0;
253 }
254
255 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
256 {
257 struct super_block *sb = mnt->mnt_sb;
258 struct udf_sb_info *sbi = UDF_SB(sb);
259
260 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
261 seq_puts(seq, ",nostrict");
262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
263 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
264 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
265 seq_puts(seq, ",unhide");
266 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
267 seq_puts(seq, ",undelete");
268 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
269 seq_puts(seq, ",noadinicb");
270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
271 seq_puts(seq, ",shortad");
272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
273 seq_puts(seq, ",uid=forget");
274 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
275 seq_puts(seq, ",uid=ignore");
276 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
277 seq_puts(seq, ",gid=forget");
278 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
279 seq_puts(seq, ",gid=ignore");
280 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
281 seq_printf(seq, ",uid=%u", sbi->s_uid);
282 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
283 seq_printf(seq, ",gid=%u", sbi->s_gid);
284 if (sbi->s_umask != 0)
285 seq_printf(seq, ",umask=%o", sbi->s_umask);
286 if (sbi->s_fmode != UDF_INVALID_MODE)
287 seq_printf(seq, ",mode=%o", sbi->s_fmode);
288 if (sbi->s_dmode != UDF_INVALID_MODE)
289 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
290 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
291 seq_printf(seq, ",session=%u", sbi->s_session);
292 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
293 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
294 if (sbi->s_anchor != 0)
295 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
296 /*
297 * volume, partition, fileset and rootdir seem to be ignored
298 * currently
299 */
300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
301 seq_puts(seq, ",utf8");
302 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
303 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
304
305 return 0;
306 }
307
308 /*
309 * udf_parse_options
310 *
311 * PURPOSE
312 * Parse mount options.
313 *
314 * DESCRIPTION
315 * The following mount options are supported:
316 *
317 * gid= Set the default group.
318 * umask= Set the default umask.
319 * mode= Set the default file permissions.
320 * dmode= Set the default directory permissions.
321 * uid= Set the default user.
322 * bs= Set the block size.
323 * unhide Show otherwise hidden files.
324 * undelete Show deleted files in lists.
325 * adinicb Embed data in the inode (default)
326 * noadinicb Don't embed data in the inode
327 * shortad Use short ad's
328 * longad Use long ad's (default)
329 * nostrict Unset strict conformance
330 * iocharset= Set the NLS character set
331 *
332 * The remaining are for debugging and disaster recovery:
333 *
334 * novrs Skip volume sequence recognition
335 *
336 * The following expect a offset from 0.
337 *
338 * session= Set the CDROM session (default= last session)
339 * anchor= Override standard anchor location. (default= 256)
340 * volume= Override the VolumeDesc location. (unused)
341 * partition= Override the PartitionDesc location. (unused)
342 * lastblock= Set the last block of the filesystem/
343 *
344 * The following expect a offset from the partition root.
345 *
346 * fileset= Override the fileset block location. (unused)
347 * rootdir= Override the root directory location. (unused)
348 * WARNING: overriding the rootdir to a non-directory may
349 * yield highly unpredictable results.
350 *
351 * PRE-CONDITIONS
352 * options Pointer to mount options string.
353 * uopts Pointer to mount options variable.
354 *
355 * POST-CONDITIONS
356 * <return> 1 Mount options parsed okay.
357 * <return> 0 Error parsing mount options.
358 *
359 * HISTORY
360 * July 1, 1997 - Andrew E. Mileski
361 * Written, tested, and released.
362 */
363
364 enum {
365 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
366 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
367 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
368 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
369 Opt_rootdir, Opt_utf8, Opt_iocharset,
370 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
371 Opt_fmode, Opt_dmode
372 };
373
374 static const match_table_t tokens = {
375 {Opt_novrs, "novrs"},
376 {Opt_nostrict, "nostrict"},
377 {Opt_bs, "bs=%u"},
378 {Opt_unhide, "unhide"},
379 {Opt_undelete, "undelete"},
380 {Opt_noadinicb, "noadinicb"},
381 {Opt_adinicb, "adinicb"},
382 {Opt_shortad, "shortad"},
383 {Opt_longad, "longad"},
384 {Opt_uforget, "uid=forget"},
385 {Opt_uignore, "uid=ignore"},
386 {Opt_gforget, "gid=forget"},
387 {Opt_gignore, "gid=ignore"},
388 {Opt_gid, "gid=%u"},
389 {Opt_uid, "uid=%u"},
390 {Opt_umask, "umask=%o"},
391 {Opt_session, "session=%u"},
392 {Opt_lastblock, "lastblock=%u"},
393 {Opt_anchor, "anchor=%u"},
394 {Opt_volume, "volume=%u"},
395 {Opt_partition, "partition=%u"},
396 {Opt_fileset, "fileset=%u"},
397 {Opt_rootdir, "rootdir=%u"},
398 {Opt_utf8, "utf8"},
399 {Opt_iocharset, "iocharset=%s"},
400 {Opt_fmode, "mode=%o"},
401 {Opt_dmode, "dmode=%o"},
402 {Opt_err, NULL}
403 };
404
405 static int udf_parse_options(char *options, struct udf_options *uopt,
406 bool remount)
407 {
408 char *p;
409 int option;
410
411 uopt->novrs = 0;
412 uopt->partition = 0xFFFF;
413 uopt->session = 0xFFFFFFFF;
414 uopt->lastblock = 0;
415 uopt->anchor = 0;
416 uopt->volume = 0xFFFFFFFF;
417 uopt->rootdir = 0xFFFFFFFF;
418 uopt->fileset = 0xFFFFFFFF;
419 uopt->nls_map = NULL;
420
421 if (!options)
422 return 1;
423
424 while ((p = strsep(&options, ",")) != NULL) {
425 substring_t args[MAX_OPT_ARGS];
426 int token;
427 if (!*p)
428 continue;
429
430 token = match_token(p, tokens, args);
431 switch (token) {
432 case Opt_novrs:
433 uopt->novrs = 1;
434 break;
435 case Opt_bs:
436 if (match_int(&args[0], &option))
437 return 0;
438 uopt->blocksize = option;
439 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
440 break;
441 case Opt_unhide:
442 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
443 break;
444 case Opt_undelete:
445 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
446 break;
447 case Opt_noadinicb:
448 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
449 break;
450 case Opt_adinicb:
451 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
452 break;
453 case Opt_shortad:
454 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
455 break;
456 case Opt_longad:
457 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
458 break;
459 case Opt_gid:
460 if (match_int(args, &option))
461 return 0;
462 uopt->gid = option;
463 uopt->flags |= (1 << UDF_FLAG_GID_SET);
464 break;
465 case Opt_uid:
466 if (match_int(args, &option))
467 return 0;
468 uopt->uid = option;
469 uopt->flags |= (1 << UDF_FLAG_UID_SET);
470 break;
471 case Opt_umask:
472 if (match_octal(args, &option))
473 return 0;
474 uopt->umask = option;
475 break;
476 case Opt_nostrict:
477 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
478 break;
479 case Opt_session:
480 if (match_int(args, &option))
481 return 0;
482 uopt->session = option;
483 if (!remount)
484 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
485 break;
486 case Opt_lastblock:
487 if (match_int(args, &option))
488 return 0;
489 uopt->lastblock = option;
490 if (!remount)
491 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
492 break;
493 case Opt_anchor:
494 if (match_int(args, &option))
495 return 0;
496 uopt->anchor = option;
497 break;
498 case Opt_volume:
499 if (match_int(args, &option))
500 return 0;
501 uopt->volume = option;
502 break;
503 case Opt_partition:
504 if (match_int(args, &option))
505 return 0;
506 uopt->partition = option;
507 break;
508 case Opt_fileset:
509 if (match_int(args, &option))
510 return 0;
511 uopt->fileset = option;
512 break;
513 case Opt_rootdir:
514 if (match_int(args, &option))
515 return 0;
516 uopt->rootdir = option;
517 break;
518 case Opt_utf8:
519 uopt->flags |= (1 << UDF_FLAG_UTF8);
520 break;
521 #ifdef CONFIG_UDF_NLS
522 case Opt_iocharset:
523 uopt->nls_map = load_nls(args[0].from);
524 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
525 break;
526 #endif
527 case Opt_uignore:
528 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
529 break;
530 case Opt_uforget:
531 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
532 break;
533 case Opt_gignore:
534 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
535 break;
536 case Opt_gforget:
537 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
538 break;
539 case Opt_fmode:
540 if (match_octal(args, &option))
541 return 0;
542 uopt->fmode = option & 0777;
543 break;
544 case Opt_dmode:
545 if (match_octal(args, &option))
546 return 0;
547 uopt->dmode = option & 0777;
548 break;
549 default:
550 printk(KERN_ERR "udf: bad mount option \"%s\" "
551 "or missing value\n", p);
552 return 0;
553 }
554 }
555 return 1;
556 }
557
558 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
559 {
560 struct udf_options uopt;
561 struct udf_sb_info *sbi = UDF_SB(sb);
562 int error = 0;
563
564 uopt.flags = sbi->s_flags;
565 uopt.uid = sbi->s_uid;
566 uopt.gid = sbi->s_gid;
567 uopt.umask = sbi->s_umask;
568 uopt.fmode = sbi->s_fmode;
569 uopt.dmode = sbi->s_dmode;
570
571 if (!udf_parse_options(options, &uopt, true))
572 return -EINVAL;
573
574 write_lock(&sbi->s_cred_lock);
575 sbi->s_flags = uopt.flags;
576 sbi->s_uid = uopt.uid;
577 sbi->s_gid = uopt.gid;
578 sbi->s_umask = uopt.umask;
579 sbi->s_fmode = uopt.fmode;
580 sbi->s_dmode = uopt.dmode;
581 write_unlock(&sbi->s_cred_lock);
582
583 if (sbi->s_lvid_bh) {
584 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
585 if (write_rev > UDF_MAX_WRITE_VERSION)
586 *flags |= MS_RDONLY;
587 }
588
589 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
590 goto out_unlock;
591
592 if (*flags & MS_RDONLY)
593 udf_close_lvid(sb);
594 else
595 udf_open_lvid(sb);
596
597 out_unlock:
598 return error;
599 }
600
601 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
602 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
603 static loff_t udf_check_vsd(struct super_block *sb)
604 {
605 struct volStructDesc *vsd = NULL;
606 loff_t sector = 32768;
607 int sectorsize;
608 struct buffer_head *bh = NULL;
609 int nsr02 = 0;
610 int nsr03 = 0;
611 struct udf_sb_info *sbi;
612
613 sbi = UDF_SB(sb);
614 if (sb->s_blocksize < sizeof(struct volStructDesc))
615 sectorsize = sizeof(struct volStructDesc);
616 else
617 sectorsize = sb->s_blocksize;
618
619 sector += (sbi->s_session << sb->s_blocksize_bits);
620
621 udf_debug("Starting at sector %u (%ld byte sectors)\n",
622 (unsigned int)(sector >> sb->s_blocksize_bits),
623 sb->s_blocksize);
624 /* Process the sequence (if applicable) */
625 for (; !nsr02 && !nsr03; sector += sectorsize) {
626 /* Read a block */
627 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
628 if (!bh)
629 break;
630
631 /* Look for ISO descriptors */
632 vsd = (struct volStructDesc *)(bh->b_data +
633 (sector & (sb->s_blocksize - 1)));
634
635 if (vsd->stdIdent[0] == 0) {
636 brelse(bh);
637 break;
638 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
639 VSD_STD_ID_LEN)) {
640 switch (vsd->structType) {
641 case 0:
642 udf_debug("ISO9660 Boot Record found\n");
643 break;
644 case 1:
645 udf_debug("ISO9660 Primary Volume Descriptor "
646 "found\n");
647 break;
648 case 2:
649 udf_debug("ISO9660 Supplementary Volume "
650 "Descriptor found\n");
651 break;
652 case 3:
653 udf_debug("ISO9660 Volume Partition Descriptor "
654 "found\n");
655 break;
656 case 255:
657 udf_debug("ISO9660 Volume Descriptor Set "
658 "Terminator found\n");
659 break;
660 default:
661 udf_debug("ISO9660 VRS (%u) found\n",
662 vsd->structType);
663 break;
664 }
665 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
666 VSD_STD_ID_LEN))
667 ; /* nothing */
668 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
669 VSD_STD_ID_LEN)) {
670 brelse(bh);
671 break;
672 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
673 VSD_STD_ID_LEN))
674 nsr02 = sector;
675 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
676 VSD_STD_ID_LEN))
677 nsr03 = sector;
678 brelse(bh);
679 }
680
681 if (nsr03)
682 return nsr03;
683 else if (nsr02)
684 return nsr02;
685 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
686 return -1;
687 else
688 return 0;
689 }
690
691 static int udf_find_fileset(struct super_block *sb,
692 struct kernel_lb_addr *fileset,
693 struct kernel_lb_addr *root)
694 {
695 struct buffer_head *bh = NULL;
696 long lastblock;
697 uint16_t ident;
698 struct udf_sb_info *sbi;
699
700 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
701 fileset->partitionReferenceNum != 0xFFFF) {
702 bh = udf_read_ptagged(sb, fileset, 0, &ident);
703
704 if (!bh) {
705 return 1;
706 } else if (ident != TAG_IDENT_FSD) {
707 brelse(bh);
708 return 1;
709 }
710
711 }
712
713 sbi = UDF_SB(sb);
714 if (!bh) {
715 /* Search backwards through the partitions */
716 struct kernel_lb_addr newfileset;
717
718 /* --> cvg: FIXME - is it reasonable? */
719 return 1;
720
721 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
722 (newfileset.partitionReferenceNum != 0xFFFF &&
723 fileset->logicalBlockNum == 0xFFFFFFFF &&
724 fileset->partitionReferenceNum == 0xFFFF);
725 newfileset.partitionReferenceNum--) {
726 lastblock = sbi->s_partmaps
727 [newfileset.partitionReferenceNum]
728 .s_partition_len;
729 newfileset.logicalBlockNum = 0;
730
731 do {
732 bh = udf_read_ptagged(sb, &newfileset, 0,
733 &ident);
734 if (!bh) {
735 newfileset.logicalBlockNum++;
736 continue;
737 }
738
739 switch (ident) {
740 case TAG_IDENT_SBD:
741 {
742 struct spaceBitmapDesc *sp;
743 sp = (struct spaceBitmapDesc *)
744 bh->b_data;
745 newfileset.logicalBlockNum += 1 +
746 ((le32_to_cpu(sp->numOfBytes) +
747 sizeof(struct spaceBitmapDesc)
748 - 1) >> sb->s_blocksize_bits);
749 brelse(bh);
750 break;
751 }
752 case TAG_IDENT_FSD:
753 *fileset = newfileset;
754 break;
755 default:
756 newfileset.logicalBlockNum++;
757 brelse(bh);
758 bh = NULL;
759 break;
760 }
761 } while (newfileset.logicalBlockNum < lastblock &&
762 fileset->logicalBlockNum == 0xFFFFFFFF &&
763 fileset->partitionReferenceNum == 0xFFFF);
764 }
765 }
766
767 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
768 fileset->partitionReferenceNum != 0xFFFF) && bh) {
769 udf_debug("Fileset at block=%d, partition=%d\n",
770 fileset->logicalBlockNum,
771 fileset->partitionReferenceNum);
772
773 sbi->s_partition = fileset->partitionReferenceNum;
774 udf_load_fileset(sb, bh, root);
775 brelse(bh);
776 return 0;
777 }
778 return 1;
779 }
780
781 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
782 {
783 struct primaryVolDesc *pvoldesc;
784 struct ustr *instr, *outstr;
785 struct buffer_head *bh;
786 uint16_t ident;
787 int ret = 1;
788
789 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
790 if (!instr)
791 return 1;
792
793 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
794 if (!outstr)
795 goto out1;
796
797 bh = udf_read_tagged(sb, block, block, &ident);
798 if (!bh)
799 goto out2;
800
801 BUG_ON(ident != TAG_IDENT_PVD);
802
803 pvoldesc = (struct primaryVolDesc *)bh->b_data;
804
805 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
806 pvoldesc->recordingDateAndTime)) {
807 #ifdef UDFFS_DEBUG
808 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
809 udf_debug("recording time %04u/%02u/%02u"
810 " %02u:%02u (%x)\n",
811 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
812 ts->minute, le16_to_cpu(ts->typeAndTimezone));
813 #endif
814 }
815
816 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
817 if (udf_CS0toUTF8(outstr, instr)) {
818 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
819 outstr->u_len > 31 ? 31 : outstr->u_len);
820 udf_debug("volIdent[] = '%s'\n",
821 UDF_SB(sb)->s_volume_ident);
822 }
823
824 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
825 if (udf_CS0toUTF8(outstr, instr))
826 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
827
828 brelse(bh);
829 ret = 0;
830 out2:
831 kfree(outstr);
832 out1:
833 kfree(instr);
834 return ret;
835 }
836
837 static int udf_load_metadata_files(struct super_block *sb, int partition)
838 {
839 struct udf_sb_info *sbi = UDF_SB(sb);
840 struct udf_part_map *map;
841 struct udf_meta_data *mdata;
842 struct kernel_lb_addr addr;
843 int fe_error = 0;
844
845 map = &sbi->s_partmaps[partition];
846 mdata = &map->s_type_specific.s_metadata;
847
848 /* metadata address */
849 addr.logicalBlockNum = mdata->s_meta_file_loc;
850 addr.partitionReferenceNum = map->s_partition_num;
851
852 udf_debug("Metadata file location: block = %d part = %d\n",
853 addr.logicalBlockNum, addr.partitionReferenceNum);
854
855 mdata->s_metadata_fe = udf_iget(sb, &addr);
856
857 if (mdata->s_metadata_fe == NULL) {
858 udf_warn(sb, "metadata inode efe not found, will try mirror inode\n");
859 fe_error = 1;
860 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
861 ICBTAG_FLAG_AD_SHORT) {
862 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
863 fe_error = 1;
864 iput(mdata->s_metadata_fe);
865 mdata->s_metadata_fe = NULL;
866 }
867
868 /* mirror file entry */
869 addr.logicalBlockNum = mdata->s_mirror_file_loc;
870 addr.partitionReferenceNum = map->s_partition_num;
871
872 udf_debug("Mirror metadata file location: block = %d part = %d\n",
873 addr.logicalBlockNum, addr.partitionReferenceNum);
874
875 mdata->s_mirror_fe = udf_iget(sb, &addr);
876
877 if (mdata->s_mirror_fe == NULL) {
878 if (fe_error) {
879 udf_err(sb, "mirror inode efe not found and metadata inode is missing too, exiting...\n");
880 goto error_exit;
881 } else
882 udf_warn(sb, "mirror inode efe not found, but metadata inode is OK\n");
883 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
884 ICBTAG_FLAG_AD_SHORT) {
885 udf_warn(sb, "mirror inode efe does not have short allocation descriptors!\n");
886 iput(mdata->s_mirror_fe);
887 mdata->s_mirror_fe = NULL;
888 if (fe_error)
889 goto error_exit;
890 }
891
892 /*
893 * bitmap file entry
894 * Note:
895 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
896 */
897 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
898 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
899 addr.partitionReferenceNum = map->s_partition_num;
900
901 udf_debug("Bitmap file location: block = %d part = %d\n",
902 addr.logicalBlockNum, addr.partitionReferenceNum);
903
904 mdata->s_bitmap_fe = udf_iget(sb, &addr);
905
906 if (mdata->s_bitmap_fe == NULL) {
907 if (sb->s_flags & MS_RDONLY)
908 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
909 else {
910 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
911 goto error_exit;
912 }
913 }
914 }
915
916 udf_debug("udf_load_metadata_files Ok\n");
917
918 return 0;
919
920 error_exit:
921 return 1;
922 }
923
924 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
925 struct kernel_lb_addr *root)
926 {
927 struct fileSetDesc *fset;
928
929 fset = (struct fileSetDesc *)bh->b_data;
930
931 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
932
933 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
934
935 udf_debug("Rootdir at block=%d, partition=%d\n",
936 root->logicalBlockNum, root->partitionReferenceNum);
937 }
938
939 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
940 {
941 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
942 return DIV_ROUND_UP(map->s_partition_len +
943 (sizeof(struct spaceBitmapDesc) << 3),
944 sb->s_blocksize * 8);
945 }
946
947 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
948 {
949 struct udf_bitmap *bitmap;
950 int nr_groups;
951 int size;
952
953 nr_groups = udf_compute_nr_groups(sb, index);
954 size = sizeof(struct udf_bitmap) +
955 (sizeof(struct buffer_head *) * nr_groups);
956
957 if (size <= PAGE_SIZE)
958 bitmap = kzalloc(size, GFP_KERNEL);
959 else
960 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
961
962 if (bitmap == NULL) {
963 udf_err(sb, "Unable to allocate space for bitmap and %d buffer_head pointers\n",
964 nr_groups);
965 return NULL;
966 }
967
968 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
969 bitmap->s_nr_groups = nr_groups;
970 return bitmap;
971 }
972
973 static int udf_fill_partdesc_info(struct super_block *sb,
974 struct partitionDesc *p, int p_index)
975 {
976 struct udf_part_map *map;
977 struct udf_sb_info *sbi = UDF_SB(sb);
978 struct partitionHeaderDesc *phd;
979
980 map = &sbi->s_partmaps[p_index];
981
982 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
983 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
984
985 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
986 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
987 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
988 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
989 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
990 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
991 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
992 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
993
994 udf_debug("Partition (%d type %x) starts at physical %d, "
995 "block length %d\n", p_index,
996 map->s_partition_type, map->s_partition_root,
997 map->s_partition_len);
998
999 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1000 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1001 return 0;
1002
1003 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1004 if (phd->unallocSpaceTable.extLength) {
1005 struct kernel_lb_addr loc = {
1006 .logicalBlockNum = le32_to_cpu(
1007 phd->unallocSpaceTable.extPosition),
1008 .partitionReferenceNum = p_index,
1009 };
1010
1011 map->s_uspace.s_table = udf_iget(sb, &loc);
1012 if (!map->s_uspace.s_table) {
1013 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1014 p_index);
1015 return 1;
1016 }
1017 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1018 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1019 p_index, map->s_uspace.s_table->i_ino);
1020 }
1021
1022 if (phd->unallocSpaceBitmap.extLength) {
1023 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1024 if (!bitmap)
1025 return 1;
1026 map->s_uspace.s_bitmap = bitmap;
1027 bitmap->s_extLength = le32_to_cpu(
1028 phd->unallocSpaceBitmap.extLength);
1029 bitmap->s_extPosition = le32_to_cpu(
1030 phd->unallocSpaceBitmap.extPosition);
1031 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1032 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1033 bitmap->s_extPosition);
1034 }
1035
1036 if (phd->partitionIntegrityTable.extLength)
1037 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1038
1039 if (phd->freedSpaceTable.extLength) {
1040 struct kernel_lb_addr loc = {
1041 .logicalBlockNum = le32_to_cpu(
1042 phd->freedSpaceTable.extPosition),
1043 .partitionReferenceNum = p_index,
1044 };
1045
1046 map->s_fspace.s_table = udf_iget(sb, &loc);
1047 if (!map->s_fspace.s_table) {
1048 udf_debug("cannot load freedSpaceTable (part %d)\n",
1049 p_index);
1050 return 1;
1051 }
1052
1053 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1054 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1055 p_index, map->s_fspace.s_table->i_ino);
1056 }
1057
1058 if (phd->freedSpaceBitmap.extLength) {
1059 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1060 if (!bitmap)
1061 return 1;
1062 map->s_fspace.s_bitmap = bitmap;
1063 bitmap->s_extLength = le32_to_cpu(
1064 phd->freedSpaceBitmap.extLength);
1065 bitmap->s_extPosition = le32_to_cpu(
1066 phd->freedSpaceBitmap.extPosition);
1067 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1068 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1069 bitmap->s_extPosition);
1070 }
1071 return 0;
1072 }
1073
1074 static void udf_find_vat_block(struct super_block *sb, int p_index,
1075 int type1_index, sector_t start_block)
1076 {
1077 struct udf_sb_info *sbi = UDF_SB(sb);
1078 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1079 sector_t vat_block;
1080 struct kernel_lb_addr ino;
1081
1082 /*
1083 * VAT file entry is in the last recorded block. Some broken disks have
1084 * it a few blocks before so try a bit harder...
1085 */
1086 ino.partitionReferenceNum = type1_index;
1087 for (vat_block = start_block;
1088 vat_block >= map->s_partition_root &&
1089 vat_block >= start_block - 3 &&
1090 !sbi->s_vat_inode; vat_block--) {
1091 ino.logicalBlockNum = vat_block - map->s_partition_root;
1092 sbi->s_vat_inode = udf_iget(sb, &ino);
1093 }
1094 }
1095
1096 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1097 {
1098 struct udf_sb_info *sbi = UDF_SB(sb);
1099 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1100 struct buffer_head *bh = NULL;
1101 struct udf_inode_info *vati;
1102 uint32_t pos;
1103 struct virtualAllocationTable20 *vat20;
1104 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1105
1106 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1107 if (!sbi->s_vat_inode &&
1108 sbi->s_last_block != blocks - 1) {
1109 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1110 " last recorded block (%lu), retrying with the last "
1111 "block of the device (%lu).\n",
1112 (unsigned long)sbi->s_last_block,
1113 (unsigned long)blocks - 1);
1114 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1115 }
1116 if (!sbi->s_vat_inode)
1117 return 1;
1118
1119 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1120 map->s_type_specific.s_virtual.s_start_offset = 0;
1121 map->s_type_specific.s_virtual.s_num_entries =
1122 (sbi->s_vat_inode->i_size - 36) >> 2;
1123 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1124 vati = UDF_I(sbi->s_vat_inode);
1125 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1126 pos = udf_block_map(sbi->s_vat_inode, 0);
1127 bh = sb_bread(sb, pos);
1128 if (!bh)
1129 return 1;
1130 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1131 } else {
1132 vat20 = (struct virtualAllocationTable20 *)
1133 vati->i_ext.i_data;
1134 }
1135
1136 map->s_type_specific.s_virtual.s_start_offset =
1137 le16_to_cpu(vat20->lengthHeader);
1138 map->s_type_specific.s_virtual.s_num_entries =
1139 (sbi->s_vat_inode->i_size -
1140 map->s_type_specific.s_virtual.
1141 s_start_offset) >> 2;
1142 brelse(bh);
1143 }
1144 return 0;
1145 }
1146
1147 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1148 {
1149 struct buffer_head *bh;
1150 struct partitionDesc *p;
1151 struct udf_part_map *map;
1152 struct udf_sb_info *sbi = UDF_SB(sb);
1153 int i, type1_idx;
1154 uint16_t partitionNumber;
1155 uint16_t ident;
1156 int ret = 0;
1157
1158 bh = udf_read_tagged(sb, block, block, &ident);
1159 if (!bh)
1160 return 1;
1161 if (ident != TAG_IDENT_PD)
1162 goto out_bh;
1163
1164 p = (struct partitionDesc *)bh->b_data;
1165 partitionNumber = le16_to_cpu(p->partitionNumber);
1166
1167 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1168 for (i = 0; i < sbi->s_partitions; i++) {
1169 map = &sbi->s_partmaps[i];
1170 udf_debug("Searching map: (%d == %d)\n",
1171 map->s_partition_num, partitionNumber);
1172 if (map->s_partition_num == partitionNumber &&
1173 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1174 map->s_partition_type == UDF_SPARABLE_MAP15))
1175 break;
1176 }
1177
1178 if (i >= sbi->s_partitions) {
1179 udf_debug("Partition (%d) not found in partition map\n",
1180 partitionNumber);
1181 goto out_bh;
1182 }
1183
1184 ret = udf_fill_partdesc_info(sb, p, i);
1185
1186 /*
1187 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1188 * PHYSICAL partitions are already set up
1189 */
1190 type1_idx = i;
1191 for (i = 0; i < sbi->s_partitions; i++) {
1192 map = &sbi->s_partmaps[i];
1193
1194 if (map->s_partition_num == partitionNumber &&
1195 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1196 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1197 map->s_partition_type == UDF_METADATA_MAP25))
1198 break;
1199 }
1200
1201 if (i >= sbi->s_partitions)
1202 goto out_bh;
1203
1204 ret = udf_fill_partdesc_info(sb, p, i);
1205 if (ret)
1206 goto out_bh;
1207
1208 if (map->s_partition_type == UDF_METADATA_MAP25) {
1209 ret = udf_load_metadata_files(sb, i);
1210 if (ret) {
1211 printk(KERN_ERR "UDF-fs: error loading MetaData "
1212 "partition map %d\n", i);
1213 goto out_bh;
1214 }
1215 } else {
1216 ret = udf_load_vat(sb, i, type1_idx);
1217 if (ret)
1218 goto out_bh;
1219 /*
1220 * Mark filesystem read-only if we have a partition with
1221 * virtual map since we don't handle writing to it (we
1222 * overwrite blocks instead of relocating them).
1223 */
1224 sb->s_flags |= MS_RDONLY;
1225 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1226 "because writing to pseudooverwrite partition is "
1227 "not implemented.\n");
1228 }
1229 out_bh:
1230 /* In case loading failed, we handle cleanup in udf_fill_super */
1231 brelse(bh);
1232 return ret;
1233 }
1234
1235 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1236 struct kernel_lb_addr *fileset)
1237 {
1238 struct logicalVolDesc *lvd;
1239 int i, j, offset;
1240 uint8_t type;
1241 struct udf_sb_info *sbi = UDF_SB(sb);
1242 struct genericPartitionMap *gpm;
1243 uint16_t ident;
1244 struct buffer_head *bh;
1245 int ret = 0;
1246
1247 bh = udf_read_tagged(sb, block, block, &ident);
1248 if (!bh)
1249 return 1;
1250 BUG_ON(ident != TAG_IDENT_LVD);
1251 lvd = (struct logicalVolDesc *)bh->b_data;
1252
1253 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1254 if (i != 0) {
1255 ret = i;
1256 goto out_bh;
1257 }
1258
1259 for (i = 0, offset = 0;
1260 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1261 i++, offset += gpm->partitionMapLength) {
1262 struct udf_part_map *map = &sbi->s_partmaps[i];
1263 gpm = (struct genericPartitionMap *)
1264 &(lvd->partitionMaps[offset]);
1265 type = gpm->partitionMapType;
1266 if (type == 1) {
1267 struct genericPartitionMap1 *gpm1 =
1268 (struct genericPartitionMap1 *)gpm;
1269 map->s_partition_type = UDF_TYPE1_MAP15;
1270 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1271 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1272 map->s_partition_func = NULL;
1273 } else if (type == 2) {
1274 struct udfPartitionMap2 *upm2 =
1275 (struct udfPartitionMap2 *)gpm;
1276 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1277 strlen(UDF_ID_VIRTUAL))) {
1278 u16 suf =
1279 le16_to_cpu(((__le16 *)upm2->partIdent.
1280 identSuffix)[0]);
1281 if (suf < 0x0200) {
1282 map->s_partition_type =
1283 UDF_VIRTUAL_MAP15;
1284 map->s_partition_func =
1285 udf_get_pblock_virt15;
1286 } else {
1287 map->s_partition_type =
1288 UDF_VIRTUAL_MAP20;
1289 map->s_partition_func =
1290 udf_get_pblock_virt20;
1291 }
1292 } else if (!strncmp(upm2->partIdent.ident,
1293 UDF_ID_SPARABLE,
1294 strlen(UDF_ID_SPARABLE))) {
1295 uint32_t loc;
1296 struct sparingTable *st;
1297 struct sparablePartitionMap *spm =
1298 (struct sparablePartitionMap *)gpm;
1299
1300 map->s_partition_type = UDF_SPARABLE_MAP15;
1301 map->s_type_specific.s_sparing.s_packet_len =
1302 le16_to_cpu(spm->packetLength);
1303 for (j = 0; j < spm->numSparingTables; j++) {
1304 struct buffer_head *bh2;
1305
1306 loc = le32_to_cpu(
1307 spm->locSparingTable[j]);
1308 bh2 = udf_read_tagged(sb, loc, loc,
1309 &ident);
1310 map->s_type_specific.s_sparing.
1311 s_spar_map[j] = bh2;
1312
1313 if (bh2 == NULL)
1314 continue;
1315
1316 st = (struct sparingTable *)bh2->b_data;
1317 if (ident != 0 || strncmp(
1318 st->sparingIdent.ident,
1319 UDF_ID_SPARING,
1320 strlen(UDF_ID_SPARING))) {
1321 brelse(bh2);
1322 map->s_type_specific.s_sparing.
1323 s_spar_map[j] = NULL;
1324 }
1325 }
1326 map->s_partition_func = udf_get_pblock_spar15;
1327 } else if (!strncmp(upm2->partIdent.ident,
1328 UDF_ID_METADATA,
1329 strlen(UDF_ID_METADATA))) {
1330 struct udf_meta_data *mdata =
1331 &map->s_type_specific.s_metadata;
1332 struct metadataPartitionMap *mdm =
1333 (struct metadataPartitionMap *)
1334 &(lvd->partitionMaps[offset]);
1335 udf_debug("Parsing Logical vol part %d "
1336 "type %d id=%s\n", i, type,
1337 UDF_ID_METADATA);
1338
1339 map->s_partition_type = UDF_METADATA_MAP25;
1340 map->s_partition_func = udf_get_pblock_meta25;
1341
1342 mdata->s_meta_file_loc =
1343 le32_to_cpu(mdm->metadataFileLoc);
1344 mdata->s_mirror_file_loc =
1345 le32_to_cpu(mdm->metadataMirrorFileLoc);
1346 mdata->s_bitmap_file_loc =
1347 le32_to_cpu(mdm->metadataBitmapFileLoc);
1348 mdata->s_alloc_unit_size =
1349 le32_to_cpu(mdm->allocUnitSize);
1350 mdata->s_align_unit_size =
1351 le16_to_cpu(mdm->alignUnitSize);
1352 mdata->s_dup_md_flag =
1353 mdm->flags & 0x01;
1354
1355 udf_debug("Metadata Ident suffix=0x%x\n",
1356 (le16_to_cpu(
1357 ((__le16 *)
1358 mdm->partIdent.identSuffix)[0])));
1359 udf_debug("Metadata part num=%d\n",
1360 le16_to_cpu(mdm->partitionNum));
1361 udf_debug("Metadata part alloc unit size=%d\n",
1362 le32_to_cpu(mdm->allocUnitSize));
1363 udf_debug("Metadata file loc=%d\n",
1364 le32_to_cpu(mdm->metadataFileLoc));
1365 udf_debug("Mirror file loc=%d\n",
1366 le32_to_cpu(mdm->metadataMirrorFileLoc));
1367 udf_debug("Bitmap file loc=%d\n",
1368 le32_to_cpu(mdm->metadataBitmapFileLoc));
1369 udf_debug("Duplicate Flag: %d %d\n",
1370 mdata->s_dup_md_flag, mdm->flags);
1371 } else {
1372 udf_debug("Unknown ident: %s\n",
1373 upm2->partIdent.ident);
1374 continue;
1375 }
1376 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1377 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1378 }
1379 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1380 i, map->s_partition_num, type,
1381 map->s_volumeseqnum);
1382 }
1383
1384 if (fileset) {
1385 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1386
1387 *fileset = lelb_to_cpu(la->extLocation);
1388 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1389 "partition=%d\n", fileset->logicalBlockNum,
1390 fileset->partitionReferenceNum);
1391 }
1392 if (lvd->integritySeqExt.extLength)
1393 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1394
1395 out_bh:
1396 brelse(bh);
1397 return ret;
1398 }
1399
1400 /*
1401 * udf_load_logicalvolint
1402 *
1403 */
1404 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1405 {
1406 struct buffer_head *bh = NULL;
1407 uint16_t ident;
1408 struct udf_sb_info *sbi = UDF_SB(sb);
1409 struct logicalVolIntegrityDesc *lvid;
1410
1411 while (loc.extLength > 0 &&
1412 (bh = udf_read_tagged(sb, loc.extLocation,
1413 loc.extLocation, &ident)) &&
1414 ident == TAG_IDENT_LVID) {
1415 sbi->s_lvid_bh = bh;
1416 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1417
1418 if (lvid->nextIntegrityExt.extLength)
1419 udf_load_logicalvolint(sb,
1420 leea_to_cpu(lvid->nextIntegrityExt));
1421
1422 if (sbi->s_lvid_bh != bh)
1423 brelse(bh);
1424 loc.extLength -= sb->s_blocksize;
1425 loc.extLocation++;
1426 }
1427 if (sbi->s_lvid_bh != bh)
1428 brelse(bh);
1429 }
1430
1431 /*
1432 * udf_process_sequence
1433 *
1434 * PURPOSE
1435 * Process a main/reserve volume descriptor sequence.
1436 *
1437 * PRE-CONDITIONS
1438 * sb Pointer to _locked_ superblock.
1439 * block First block of first extent of the sequence.
1440 * lastblock Lastblock of first extent of the sequence.
1441 *
1442 * HISTORY
1443 * July 1, 1997 - Andrew E. Mileski
1444 * Written, tested, and released.
1445 */
1446 static noinline int udf_process_sequence(struct super_block *sb, long block,
1447 long lastblock, struct kernel_lb_addr *fileset)
1448 {
1449 struct buffer_head *bh = NULL;
1450 struct udf_vds_record vds[VDS_POS_LENGTH];
1451 struct udf_vds_record *curr;
1452 struct generic_desc *gd;
1453 struct volDescPtr *vdp;
1454 int done = 0;
1455 uint32_t vdsn;
1456 uint16_t ident;
1457 long next_s = 0, next_e = 0;
1458
1459 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1460
1461 /*
1462 * Read the main descriptor sequence and find which descriptors
1463 * are in it.
1464 */
1465 for (; (!done && block <= lastblock); block++) {
1466
1467 bh = udf_read_tagged(sb, block, block, &ident);
1468 if (!bh) {
1469 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1470 "sequence is corrupted or we could not read "
1471 "it.\n", (unsigned long long)block);
1472 return 1;
1473 }
1474
1475 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1476 gd = (struct generic_desc *)bh->b_data;
1477 vdsn = le32_to_cpu(gd->volDescSeqNum);
1478 switch (ident) {
1479 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1480 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1481 if (vdsn >= curr->volDescSeqNum) {
1482 curr->volDescSeqNum = vdsn;
1483 curr->block = block;
1484 }
1485 break;
1486 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1487 curr = &vds[VDS_POS_VOL_DESC_PTR];
1488 if (vdsn >= curr->volDescSeqNum) {
1489 curr->volDescSeqNum = vdsn;
1490 curr->block = block;
1491
1492 vdp = (struct volDescPtr *)bh->b_data;
1493 next_s = le32_to_cpu(
1494 vdp->nextVolDescSeqExt.extLocation);
1495 next_e = le32_to_cpu(
1496 vdp->nextVolDescSeqExt.extLength);
1497 next_e = next_e >> sb->s_blocksize_bits;
1498 next_e += next_s;
1499 }
1500 break;
1501 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1502 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1503 if (vdsn >= curr->volDescSeqNum) {
1504 curr->volDescSeqNum = vdsn;
1505 curr->block = block;
1506 }
1507 break;
1508 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1509 curr = &vds[VDS_POS_PARTITION_DESC];
1510 if (!curr->block)
1511 curr->block = block;
1512 break;
1513 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1514 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1515 if (vdsn >= curr->volDescSeqNum) {
1516 curr->volDescSeqNum = vdsn;
1517 curr->block = block;
1518 }
1519 break;
1520 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1521 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1522 if (vdsn >= curr->volDescSeqNum) {
1523 curr->volDescSeqNum = vdsn;
1524 curr->block = block;
1525 }
1526 break;
1527 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1528 vds[VDS_POS_TERMINATING_DESC].block = block;
1529 if (next_e) {
1530 block = next_s;
1531 lastblock = next_e;
1532 next_s = next_e = 0;
1533 } else
1534 done = 1;
1535 break;
1536 }
1537 brelse(bh);
1538 }
1539 /*
1540 * Now read interesting descriptors again and process them
1541 * in a suitable order
1542 */
1543 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1544 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1545 return 1;
1546 }
1547 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1548 return 1;
1549
1550 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1551 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1552 return 1;
1553
1554 if (vds[VDS_POS_PARTITION_DESC].block) {
1555 /*
1556 * We rescan the whole descriptor sequence to find
1557 * partition descriptor blocks and process them.
1558 */
1559 for (block = vds[VDS_POS_PARTITION_DESC].block;
1560 block < vds[VDS_POS_TERMINATING_DESC].block;
1561 block++)
1562 if (udf_load_partdesc(sb, block))
1563 return 1;
1564 }
1565
1566 return 0;
1567 }
1568
1569 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1570 struct kernel_lb_addr *fileset)
1571 {
1572 struct anchorVolDescPtr *anchor;
1573 long main_s, main_e, reserve_s, reserve_e;
1574
1575 anchor = (struct anchorVolDescPtr *)bh->b_data;
1576
1577 /* Locate the main sequence */
1578 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1579 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1580 main_e = main_e >> sb->s_blocksize_bits;
1581 main_e += main_s;
1582
1583 /* Locate the reserve sequence */
1584 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1585 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1586 reserve_e = reserve_e >> sb->s_blocksize_bits;
1587 reserve_e += reserve_s;
1588
1589 /* Process the main & reserve sequences */
1590 /* responsible for finding the PartitionDesc(s) */
1591 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1592 return 1;
1593 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1594 }
1595
1596 /*
1597 * Check whether there is an anchor block in the given block and
1598 * load Volume Descriptor Sequence if so.
1599 */
1600 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1601 struct kernel_lb_addr *fileset)
1602 {
1603 struct buffer_head *bh;
1604 uint16_t ident;
1605 int ret;
1606
1607 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1608 udf_fixed_to_variable(block) >=
1609 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1610 return 0;
1611
1612 bh = udf_read_tagged(sb, block, block, &ident);
1613 if (!bh)
1614 return 0;
1615 if (ident != TAG_IDENT_AVDP) {
1616 brelse(bh);
1617 return 0;
1618 }
1619 ret = udf_load_sequence(sb, bh, fileset);
1620 brelse(bh);
1621 return ret;
1622 }
1623
1624 /* Search for an anchor volume descriptor pointer */
1625 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1626 struct kernel_lb_addr *fileset)
1627 {
1628 sector_t last[6];
1629 int i;
1630 struct udf_sb_info *sbi = UDF_SB(sb);
1631 int last_count = 0;
1632
1633 /* First try user provided anchor */
1634 if (sbi->s_anchor) {
1635 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1636 return lastblock;
1637 }
1638 /*
1639 * according to spec, anchor is in either:
1640 * block 256
1641 * lastblock-256
1642 * lastblock
1643 * however, if the disc isn't closed, it could be 512.
1644 */
1645 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1646 return lastblock;
1647 /*
1648 * The trouble is which block is the last one. Drives often misreport
1649 * this so we try various possibilities.
1650 */
1651 last[last_count++] = lastblock;
1652 if (lastblock >= 1)
1653 last[last_count++] = lastblock - 1;
1654 last[last_count++] = lastblock + 1;
1655 if (lastblock >= 2)
1656 last[last_count++] = lastblock - 2;
1657 if (lastblock >= 150)
1658 last[last_count++] = lastblock - 150;
1659 if (lastblock >= 152)
1660 last[last_count++] = lastblock - 152;
1661
1662 for (i = 0; i < last_count; i++) {
1663 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1664 sb->s_blocksize_bits)
1665 continue;
1666 if (udf_check_anchor_block(sb, last[i], fileset))
1667 return last[i];
1668 if (last[i] < 256)
1669 continue;
1670 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1671 return last[i];
1672 }
1673
1674 /* Finally try block 512 in case media is open */
1675 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1676 return last[0];
1677 return 0;
1678 }
1679
1680 /*
1681 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1682 * area specified by it. The function expects sbi->s_lastblock to be the last
1683 * block on the media.
1684 *
1685 * Return 1 if ok, 0 if not found.
1686 *
1687 */
1688 static int udf_find_anchor(struct super_block *sb,
1689 struct kernel_lb_addr *fileset)
1690 {
1691 sector_t lastblock;
1692 struct udf_sb_info *sbi = UDF_SB(sb);
1693
1694 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1695 if (lastblock)
1696 goto out;
1697
1698 /* No anchor found? Try VARCONV conversion of block numbers */
1699 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1700 /* Firstly, we try to not convert number of the last block */
1701 lastblock = udf_scan_anchors(sb,
1702 udf_variable_to_fixed(sbi->s_last_block),
1703 fileset);
1704 if (lastblock)
1705 goto out;
1706
1707 /* Secondly, we try with converted number of the last block */
1708 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1709 if (!lastblock) {
1710 /* VARCONV didn't help. Clear it. */
1711 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1712 return 0;
1713 }
1714 out:
1715 sbi->s_last_block = lastblock;
1716 return 1;
1717 }
1718
1719 /*
1720 * Check Volume Structure Descriptor, find Anchor block and load Volume
1721 * Descriptor Sequence
1722 */
1723 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1724 int silent, struct kernel_lb_addr *fileset)
1725 {
1726 struct udf_sb_info *sbi = UDF_SB(sb);
1727 loff_t nsr_off;
1728
1729 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1730 if (!silent)
1731 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1732 return 0;
1733 }
1734 sbi->s_last_block = uopt->lastblock;
1735 if (!uopt->novrs) {
1736 /* Check that it is NSR02 compliant */
1737 nsr_off = udf_check_vsd(sb);
1738 if (!nsr_off) {
1739 if (!silent)
1740 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1741 return 0;
1742 }
1743 if (nsr_off == -1)
1744 udf_debug("Failed to read byte 32768. Assuming open "
1745 "disc. Skipping validity check\n");
1746 if (!sbi->s_last_block)
1747 sbi->s_last_block = udf_get_last_block(sb);
1748 } else {
1749 udf_debug("Validity check skipped because of novrs option\n");
1750 }
1751
1752 /* Look for anchor block and load Volume Descriptor Sequence */
1753 sbi->s_anchor = uopt->anchor;
1754 if (!udf_find_anchor(sb, fileset)) {
1755 if (!silent)
1756 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1757 return 0;
1758 }
1759 return 1;
1760 }
1761
1762 static void udf_open_lvid(struct super_block *sb)
1763 {
1764 struct udf_sb_info *sbi = UDF_SB(sb);
1765 struct buffer_head *bh = sbi->s_lvid_bh;
1766 struct logicalVolIntegrityDesc *lvid;
1767 struct logicalVolIntegrityDescImpUse *lvidiu;
1768
1769 if (!bh)
1770 return;
1771
1772 mutex_lock(&sbi->s_alloc_mutex);
1773 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1774 lvidiu = udf_sb_lvidiu(sbi);
1775
1776 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1777 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1778 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1779 CURRENT_TIME);
1780 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1781
1782 lvid->descTag.descCRC = cpu_to_le16(
1783 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1784 le16_to_cpu(lvid->descTag.descCRCLength)));
1785
1786 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1787 mark_buffer_dirty(bh);
1788 sbi->s_lvid_dirty = 0;
1789 mutex_unlock(&sbi->s_alloc_mutex);
1790 }
1791
1792 static void udf_close_lvid(struct super_block *sb)
1793 {
1794 struct udf_sb_info *sbi = UDF_SB(sb);
1795 struct buffer_head *bh = sbi->s_lvid_bh;
1796 struct logicalVolIntegrityDesc *lvid;
1797 struct logicalVolIntegrityDescImpUse *lvidiu;
1798
1799 if (!bh)
1800 return;
1801
1802 mutex_lock(&sbi->s_alloc_mutex);
1803 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1804 lvidiu = udf_sb_lvidiu(sbi);
1805 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1806 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1807 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1808 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1809 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1810 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1811 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1812 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1813 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1814 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1815
1816 lvid->descTag.descCRC = cpu_to_le16(
1817 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1818 le16_to_cpu(lvid->descTag.descCRCLength)));
1819
1820 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1821 mark_buffer_dirty(bh);
1822 sbi->s_lvid_dirty = 0;
1823 mutex_unlock(&sbi->s_alloc_mutex);
1824 }
1825
1826 u64 lvid_get_unique_id(struct super_block *sb)
1827 {
1828 struct buffer_head *bh;
1829 struct udf_sb_info *sbi = UDF_SB(sb);
1830 struct logicalVolIntegrityDesc *lvid;
1831 struct logicalVolHeaderDesc *lvhd;
1832 u64 uniqueID;
1833 u64 ret;
1834
1835 bh = sbi->s_lvid_bh;
1836 if (!bh)
1837 return 0;
1838
1839 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1840 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1841
1842 mutex_lock(&sbi->s_alloc_mutex);
1843 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1844 if (!(++uniqueID & 0xFFFFFFFF))
1845 uniqueID += 16;
1846 lvhd->uniqueID = cpu_to_le64(uniqueID);
1847 mutex_unlock(&sbi->s_alloc_mutex);
1848 mark_buffer_dirty(bh);
1849
1850 return ret;
1851 }
1852
1853 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1854 {
1855 int i;
1856 int nr_groups = bitmap->s_nr_groups;
1857 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1858 nr_groups);
1859
1860 for (i = 0; i < nr_groups; i++)
1861 if (bitmap->s_block_bitmap[i])
1862 brelse(bitmap->s_block_bitmap[i]);
1863
1864 if (size <= PAGE_SIZE)
1865 kfree(bitmap);
1866 else
1867 vfree(bitmap);
1868 }
1869
1870 static void udf_free_partition(struct udf_part_map *map)
1871 {
1872 int i;
1873 struct udf_meta_data *mdata;
1874
1875 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1876 iput(map->s_uspace.s_table);
1877 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1878 iput(map->s_fspace.s_table);
1879 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1880 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1881 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1882 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1883 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1884 for (i = 0; i < 4; i++)
1885 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1886 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1887 mdata = &map->s_type_specific.s_metadata;
1888 iput(mdata->s_metadata_fe);
1889 mdata->s_metadata_fe = NULL;
1890
1891 iput(mdata->s_mirror_fe);
1892 mdata->s_mirror_fe = NULL;
1893
1894 iput(mdata->s_bitmap_fe);
1895 mdata->s_bitmap_fe = NULL;
1896 }
1897 }
1898
1899 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1900 {
1901 int i;
1902 int ret;
1903 struct inode *inode = NULL;
1904 struct udf_options uopt;
1905 struct kernel_lb_addr rootdir, fileset;
1906 struct udf_sb_info *sbi;
1907
1908 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1909 uopt.uid = -1;
1910 uopt.gid = -1;
1911 uopt.umask = 0;
1912 uopt.fmode = UDF_INVALID_MODE;
1913 uopt.dmode = UDF_INVALID_MODE;
1914
1915 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1916 if (!sbi)
1917 return -ENOMEM;
1918
1919 sb->s_fs_info = sbi;
1920
1921 mutex_init(&sbi->s_alloc_mutex);
1922
1923 if (!udf_parse_options((char *)options, &uopt, false))
1924 goto error_out;
1925
1926 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1927 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1928 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1929 goto error_out;
1930 }
1931 #ifdef CONFIG_UDF_NLS
1932 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1933 uopt.nls_map = load_nls_default();
1934 if (!uopt.nls_map)
1935 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1936 else
1937 udf_debug("Using default NLS map\n");
1938 }
1939 #endif
1940 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1941 uopt.flags |= (1 << UDF_FLAG_UTF8);
1942
1943 fileset.logicalBlockNum = 0xFFFFFFFF;
1944 fileset.partitionReferenceNum = 0xFFFF;
1945
1946 sbi->s_flags = uopt.flags;
1947 sbi->s_uid = uopt.uid;
1948 sbi->s_gid = uopt.gid;
1949 sbi->s_umask = uopt.umask;
1950 sbi->s_fmode = uopt.fmode;
1951 sbi->s_dmode = uopt.dmode;
1952 sbi->s_nls_map = uopt.nls_map;
1953 rwlock_init(&sbi->s_cred_lock);
1954
1955 if (uopt.session == 0xFFFFFFFF)
1956 sbi->s_session = udf_get_last_session(sb);
1957 else
1958 sbi->s_session = uopt.session;
1959
1960 udf_debug("Multi-session=%d\n", sbi->s_session);
1961
1962 /* Fill in the rest of the superblock */
1963 sb->s_op = &udf_sb_ops;
1964 sb->s_export_op = &udf_export_ops;
1965
1966 sb->s_dirt = 0;
1967 sb->s_magic = UDF_SUPER_MAGIC;
1968 sb->s_time_gran = 1000;
1969
1970 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1971 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1972 } else {
1973 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
1974 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1975 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1976 if (!silent)
1977 printk(KERN_NOTICE
1978 "UDF-fs: Rescanning with blocksize "
1979 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1980 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1981 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1982 }
1983 }
1984 if (!ret) {
1985 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1986 goto error_out;
1987 }
1988
1989 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1990
1991 if (sbi->s_lvid_bh) {
1992 struct logicalVolIntegrityDescImpUse *lvidiu =
1993 udf_sb_lvidiu(sbi);
1994 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1995 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1996 /* uint16_t maxUDFWriteRev =
1997 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1998
1999 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2000 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
2001 "(max is %x)\n",
2002 le16_to_cpu(lvidiu->minUDFReadRev),
2003 UDF_MAX_READ_VERSION);
2004 goto error_out;
2005 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
2006 sb->s_flags |= MS_RDONLY;
2007
2008 sbi->s_udfrev = minUDFWriteRev;
2009
2010 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2011 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2012 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2013 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2014 }
2015
2016 if (!sbi->s_partitions) {
2017 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
2018 goto error_out;
2019 }
2020
2021 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2022 UDF_PART_FLAG_READ_ONLY) {
2023 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2024 "forcing readonly mount\n");
2025 sb->s_flags |= MS_RDONLY;
2026 }
2027
2028 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2029 printk(KERN_WARNING "UDF-fs: No fileset found\n");
2030 goto error_out;
2031 }
2032
2033 if (!silent) {
2034 struct timestamp ts;
2035 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2036 udf_info("UDF: Mounting volume '%s', "
2037 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2038 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2039 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2040 }
2041 if (!(sb->s_flags & MS_RDONLY))
2042 udf_open_lvid(sb);
2043
2044 /* Assign the root inode */
2045 /* assign inodes by physical block number */
2046 /* perhaps it's not extensible enough, but for now ... */
2047 inode = udf_iget(sb, &rootdir);
2048 if (!inode) {
2049 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2050 "partition=%d\n",
2051 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2052 goto error_out;
2053 }
2054
2055 /* Allocate a dentry for the root inode */
2056 sb->s_root = d_alloc_root(inode);
2057 if (!sb->s_root) {
2058 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
2059 iput(inode);
2060 goto error_out;
2061 }
2062 sb->s_maxbytes = MAX_LFS_FILESIZE;
2063 return 0;
2064
2065 error_out:
2066 if (sbi->s_vat_inode)
2067 iput(sbi->s_vat_inode);
2068 if (sbi->s_partitions)
2069 for (i = 0; i < sbi->s_partitions; i++)
2070 udf_free_partition(&sbi->s_partmaps[i]);
2071 #ifdef CONFIG_UDF_NLS
2072 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2073 unload_nls(sbi->s_nls_map);
2074 #endif
2075 if (!(sb->s_flags & MS_RDONLY))
2076 udf_close_lvid(sb);
2077 brelse(sbi->s_lvid_bh);
2078
2079 kfree(sbi->s_partmaps);
2080 kfree(sbi);
2081 sb->s_fs_info = NULL;
2082
2083 return -EINVAL;
2084 }
2085
2086 void _udf_err(struct super_block *sb, const char *function,
2087 const char *fmt, ...)
2088 {
2089 va_list args;
2090
2091 if (!(sb->s_flags & MS_RDONLY)) {
2092 /* mark sb error */
2093 sb->s_dirt = 1;
2094 }
2095 va_start(args, fmt);
2096 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2097 va_end(args);
2098 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s",
2099 sb->s_id, function, error_buf);
2100 }
2101
2102 void _udf_warn(struct super_block *sb, const char *function,
2103 const char *fmt, ...)
2104 {
2105 va_list args;
2106
2107 va_start(args, fmt);
2108 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2109 va_end(args);
2110 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s",
2111 sb->s_id, function, error_buf);
2112 }
2113
2114 static void udf_put_super(struct super_block *sb)
2115 {
2116 int i;
2117 struct udf_sb_info *sbi;
2118
2119 sbi = UDF_SB(sb);
2120
2121 if (sbi->s_vat_inode)
2122 iput(sbi->s_vat_inode);
2123 if (sbi->s_partitions)
2124 for (i = 0; i < sbi->s_partitions; i++)
2125 udf_free_partition(&sbi->s_partmaps[i]);
2126 #ifdef CONFIG_UDF_NLS
2127 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2128 unload_nls(sbi->s_nls_map);
2129 #endif
2130 if (!(sb->s_flags & MS_RDONLY))
2131 udf_close_lvid(sb);
2132 brelse(sbi->s_lvid_bh);
2133 kfree(sbi->s_partmaps);
2134 kfree(sb->s_fs_info);
2135 sb->s_fs_info = NULL;
2136 }
2137
2138 static int udf_sync_fs(struct super_block *sb, int wait)
2139 {
2140 struct udf_sb_info *sbi = UDF_SB(sb);
2141
2142 mutex_lock(&sbi->s_alloc_mutex);
2143 if (sbi->s_lvid_dirty) {
2144 /*
2145 * Blockdevice will be synced later so we don't have to submit
2146 * the buffer for IO
2147 */
2148 mark_buffer_dirty(sbi->s_lvid_bh);
2149 sb->s_dirt = 0;
2150 sbi->s_lvid_dirty = 0;
2151 }
2152 mutex_unlock(&sbi->s_alloc_mutex);
2153
2154 return 0;
2155 }
2156
2157 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2158 {
2159 struct super_block *sb = dentry->d_sb;
2160 struct udf_sb_info *sbi = UDF_SB(sb);
2161 struct logicalVolIntegrityDescImpUse *lvidiu;
2162 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2163
2164 if (sbi->s_lvid_bh != NULL)
2165 lvidiu = udf_sb_lvidiu(sbi);
2166 else
2167 lvidiu = NULL;
2168
2169 buf->f_type = UDF_SUPER_MAGIC;
2170 buf->f_bsize = sb->s_blocksize;
2171 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2172 buf->f_bfree = udf_count_free(sb);
2173 buf->f_bavail = buf->f_bfree;
2174 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2175 le32_to_cpu(lvidiu->numDirs)) : 0)
2176 + buf->f_bfree;
2177 buf->f_ffree = buf->f_bfree;
2178 buf->f_namelen = UDF_NAME_LEN - 2;
2179 buf->f_fsid.val[0] = (u32)id;
2180 buf->f_fsid.val[1] = (u32)(id >> 32);
2181
2182 return 0;
2183 }
2184
2185 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2186 struct udf_bitmap *bitmap)
2187 {
2188 struct buffer_head *bh = NULL;
2189 unsigned int accum = 0;
2190 int index;
2191 int block = 0, newblock;
2192 struct kernel_lb_addr loc;
2193 uint32_t bytes;
2194 uint8_t *ptr;
2195 uint16_t ident;
2196 struct spaceBitmapDesc *bm;
2197
2198 loc.logicalBlockNum = bitmap->s_extPosition;
2199 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2200 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2201
2202 if (!bh) {
2203 printk(KERN_ERR "udf: udf_count_free failed\n");
2204 goto out;
2205 } else if (ident != TAG_IDENT_SBD) {
2206 brelse(bh);
2207 printk(KERN_ERR "udf: udf_count_free failed\n");
2208 goto out;
2209 }
2210
2211 bm = (struct spaceBitmapDesc *)bh->b_data;
2212 bytes = le32_to_cpu(bm->numOfBytes);
2213 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2214 ptr = (uint8_t *)bh->b_data;
2215
2216 while (bytes > 0) {
2217 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2218 accum += bitmap_weight((const unsigned long *)(ptr + index),
2219 cur_bytes * 8);
2220 bytes -= cur_bytes;
2221 if (bytes) {
2222 brelse(bh);
2223 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2224 bh = udf_tread(sb, newblock);
2225 if (!bh) {
2226 udf_debug("read failed\n");
2227 goto out;
2228 }
2229 index = 0;
2230 ptr = (uint8_t *)bh->b_data;
2231 }
2232 }
2233 brelse(bh);
2234 out:
2235 return accum;
2236 }
2237
2238 static unsigned int udf_count_free_table(struct super_block *sb,
2239 struct inode *table)
2240 {
2241 unsigned int accum = 0;
2242 uint32_t elen;
2243 struct kernel_lb_addr eloc;
2244 int8_t etype;
2245 struct extent_position epos;
2246
2247 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2248 epos.block = UDF_I(table)->i_location;
2249 epos.offset = sizeof(struct unallocSpaceEntry);
2250 epos.bh = NULL;
2251
2252 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2253 accum += (elen >> table->i_sb->s_blocksize_bits);
2254
2255 brelse(epos.bh);
2256 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2257
2258 return accum;
2259 }
2260
2261 static unsigned int udf_count_free(struct super_block *sb)
2262 {
2263 unsigned int accum = 0;
2264 struct udf_sb_info *sbi;
2265 struct udf_part_map *map;
2266
2267 sbi = UDF_SB(sb);
2268 if (sbi->s_lvid_bh) {
2269 struct logicalVolIntegrityDesc *lvid =
2270 (struct logicalVolIntegrityDesc *)
2271 sbi->s_lvid_bh->b_data;
2272 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2273 accum = le32_to_cpu(
2274 lvid->freeSpaceTable[sbi->s_partition]);
2275 if (accum == 0xFFFFFFFF)
2276 accum = 0;
2277 }
2278 }
2279
2280 if (accum)
2281 return accum;
2282
2283 map = &sbi->s_partmaps[sbi->s_partition];
2284 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2285 accum += udf_count_free_bitmap(sb,
2286 map->s_uspace.s_bitmap);
2287 }
2288 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2289 accum += udf_count_free_bitmap(sb,
2290 map->s_fspace.s_bitmap);
2291 }
2292 if (accum)
2293 return accum;
2294
2295 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2296 accum += udf_count_free_table(sb,
2297 map->s_uspace.s_table);
2298 }
2299 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2300 accum += udf_count_free_table(sb,
2301 map->s_fspace.s_table);
2302 }
2303
2304 return accum;
2305 }
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