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Linux 2.6.35-rc2
[linux/fpc-iii.git] / fs / udf / super.c
blob612d1e2e285a158bfd1bf7661621565dda955de9
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/smp_lock.h>
52 #include <linux/buffer_head.h>
53 #include <linux/vfs.h>
54 #include <linux/vmalloc.h>
55 #include <linux/errno.h>
56 #include <linux/mount.h>
57 #include <linux/seq_file.h>
58 #include <linux/bitmap.h>
59 #include <linux/crc-itu-t.h>
60 #include <asm/byteorder.h>
61
62 #include "udf_sb.h"
63 #include "udf_i.h"
64
65 #include <linux/init.h>
66 #include <asm/uaccess.h>
67
68 #define VDS_POS_PRIMARY_VOL_DESC 0
69 #define VDS_POS_UNALLOC_SPACE_DESC 1
70 #define VDS_POS_LOGICAL_VOL_DESC 2
71 #define VDS_POS_PARTITION_DESC 3
72 #define VDS_POS_IMP_USE_VOL_DESC 4
73 #define VDS_POS_VOL_DESC_PTR 5
74 #define VDS_POS_TERMINATING_DESC 6
75 #define VDS_POS_LENGTH 7
76
77 #define UDF_DEFAULT_BLOCKSIZE 2048
78
79 static char error_buf[1024];
80
81 /* These are the "meat" - everything else is stuffing */
82 static int udf_fill_super(struct super_block *, void *, int);
83 static void udf_put_super(struct super_block *);
84 static int udf_sync_fs(struct super_block *, int);
85 static int udf_remount_fs(struct super_block *, int *, char *);
86 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
87 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
89 static void udf_load_fileset(struct super_block *, struct buffer_head *,
90 struct kernel_lb_addr *);
91 static void udf_open_lvid(struct super_block *);
92 static void udf_close_lvid(struct super_block *);
93 static unsigned int udf_count_free(struct super_block *);
94 static int udf_statfs(struct dentry *, struct kstatfs *);
95 static int udf_show_options(struct seq_file *, struct vfsmount *);
96 static void udf_error(struct super_block *sb, const char *function,
97 const char *fmt, ...);
98
99 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
100 {
101 struct logicalVolIntegrityDesc *lvid =
102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
104 __u32 offset = number_of_partitions * 2 *
105 sizeof(uint32_t)/sizeof(uint8_t);
106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107 }
108
109 /* UDF filesystem type */
110 static int udf_get_sb(struct file_system_type *fs_type,
111 int flags, const char *dev_name, void *data,
112 struct vfsmount *mnt)
113 {
114 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
115 }
116
117 static struct file_system_type udf_fstype = {
118 .owner = THIS_MODULE,
119 .name = "udf",
120 .get_sb = udf_get_sb,
121 .kill_sb = kill_block_super,
122 .fs_flags = FS_REQUIRES_DEV,
123 };
124
125 static struct kmem_cache *udf_inode_cachep;
126
127 static struct inode *udf_alloc_inode(struct super_block *sb)
128 {
129 struct udf_inode_info *ei;
130 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
131 if (!ei)
132 return NULL;
133
134 ei->i_unique = 0;
135 ei->i_lenExtents = 0;
136 ei->i_next_alloc_block = 0;
137 ei->i_next_alloc_goal = 0;
138 ei->i_strat4096 = 0;
139
140 return &ei->vfs_inode;
141 }
142
143 static void udf_destroy_inode(struct inode *inode)
144 {
145 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
146 }
147
148 static void init_once(void *foo)
149 {
150 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
151
152 ei->i_ext.i_data = NULL;
153 inode_init_once(&ei->vfs_inode);
154 }
155
156 static int init_inodecache(void)
157 {
158 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
159 sizeof(struct udf_inode_info),
160 0, (SLAB_RECLAIM_ACCOUNT |
161 SLAB_MEM_SPREAD),
162 init_once);
163 if (!udf_inode_cachep)
164 return -ENOMEM;
165 return 0;
166 }
167
168 static void destroy_inodecache(void)
169 {
170 kmem_cache_destroy(udf_inode_cachep);
171 }
172
173 /* Superblock operations */
174 static const struct super_operations udf_sb_ops = {
175 .alloc_inode = udf_alloc_inode,
176 .destroy_inode = udf_destroy_inode,
177 .write_inode = udf_write_inode,
178 .delete_inode = udf_delete_inode,
179 .clear_inode = udf_clear_inode,
180 .put_super = udf_put_super,
181 .sync_fs = udf_sync_fs,
182 .statfs = udf_statfs,
183 .remount_fs = udf_remount_fs,
184 .show_options = udf_show_options,
185 };
186
187 struct udf_options {
188 unsigned char novrs;
189 unsigned int blocksize;
190 unsigned int session;
191 unsigned int lastblock;
192 unsigned int anchor;
193 unsigned int volume;
194 unsigned short partition;
195 unsigned int fileset;
196 unsigned int rootdir;
197 unsigned int flags;
198 mode_t umask;
199 gid_t gid;
200 uid_t uid;
201 mode_t fmode;
202 mode_t dmode;
203 struct nls_table *nls_map;
204 };
205
206 static int __init init_udf_fs(void)
207 {
208 int err;
209
210 err = init_inodecache();
211 if (err)
212 goto out1;
213 err = register_filesystem(&udf_fstype);
214 if (err)
215 goto out;
216
217 return 0;
218
219 out:
220 destroy_inodecache();
221
222 out1:
223 return err;
224 }
225
226 static void __exit exit_udf_fs(void)
227 {
228 unregister_filesystem(&udf_fstype);
229 destroy_inodecache();
230 }
231
232 module_init(init_udf_fs)
233 module_exit(exit_udf_fs)
234
235 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
236 {
237 struct udf_sb_info *sbi = UDF_SB(sb);
238
239 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
240 GFP_KERNEL);
241 if (!sbi->s_partmaps) {
242 udf_error(sb, __func__,
243 "Unable to allocate space for %d partition maps",
244 count);
245 sbi->s_partitions = 0;
246 return -ENOMEM;
247 }
248
249 sbi->s_partitions = count;
250 return 0;
251 }
252
253 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
254 {
255 struct super_block *sb = mnt->mnt_sb;
256 struct udf_sb_info *sbi = UDF_SB(sb);
257
258 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
259 seq_puts(seq, ",nostrict");
260 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
261 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
263 seq_puts(seq, ",unhide");
264 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
265 seq_puts(seq, ",undelete");
266 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
267 seq_puts(seq, ",noadinicb");
268 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
269 seq_puts(seq, ",shortad");
270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
271 seq_puts(seq, ",uid=forget");
272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
273 seq_puts(seq, ",uid=ignore");
274 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
275 seq_puts(seq, ",gid=forget");
276 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
277 seq_puts(seq, ",gid=ignore");
278 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
279 seq_printf(seq, ",uid=%u", sbi->s_uid);
280 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
281 seq_printf(seq, ",gid=%u", sbi->s_gid);
282 if (sbi->s_umask != 0)
283 seq_printf(seq, ",umask=%o", sbi->s_umask);
284 if (sbi->s_fmode != UDF_INVALID_MODE)
285 seq_printf(seq, ",mode=%o", sbi->s_fmode);
286 if (sbi->s_dmode != UDF_INVALID_MODE)
287 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
288 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
289 seq_printf(seq, ",session=%u", sbi->s_session);
290 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
291 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
292 if (sbi->s_anchor != 0)
293 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
294 /*
295 * volume, partition, fileset and rootdir seem to be ignored
296 * currently
297 */
298 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
299 seq_puts(seq, ",utf8");
300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
301 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
302
303 return 0;
304 }
305
306 /*
307 * udf_parse_options
308 *
309 * PURPOSE
310 * Parse mount options.
311 *
312 * DESCRIPTION
313 * The following mount options are supported:
314 *
315 * gid= Set the default group.
316 * umask= Set the default umask.
317 * mode= Set the default file permissions.
318 * dmode= Set the default directory permissions.
319 * uid= Set the default user.
320 * bs= Set the block size.
321 * unhide Show otherwise hidden files.
322 * undelete Show deleted files in lists.
323 * adinicb Embed data in the inode (default)
324 * noadinicb Don't embed data in the inode
325 * shortad Use short ad's
326 * longad Use long ad's (default)
327 * nostrict Unset strict conformance
328 * iocharset= Set the NLS character set
329 *
330 * The remaining are for debugging and disaster recovery:
331 *
332 * novrs Skip volume sequence recognition
333 *
334 * The following expect a offset from 0.
335 *
336 * session= Set the CDROM session (default= last session)
337 * anchor= Override standard anchor location. (default= 256)
338 * volume= Override the VolumeDesc location. (unused)
339 * partition= Override the PartitionDesc location. (unused)
340 * lastblock= Set the last block of the filesystem/
341 *
342 * The following expect a offset from the partition root.
343 *
344 * fileset= Override the fileset block location. (unused)
345 * rootdir= Override the root directory location. (unused)
346 * WARNING: overriding the rootdir to a non-directory may
347 * yield highly unpredictable results.
348 *
349 * PRE-CONDITIONS
350 * options Pointer to mount options string.
351 * uopts Pointer to mount options variable.
352 *
353 * POST-CONDITIONS
354 * <return> 1 Mount options parsed okay.
355 * <return> 0 Error parsing mount options.
356 *
357 * HISTORY
358 * July 1, 1997 - Andrew E. Mileski
359 * Written, tested, and released.
360 */
361
362 enum {
363 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
364 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
365 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
366 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
367 Opt_rootdir, Opt_utf8, Opt_iocharset,
368 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
369 Opt_fmode, Opt_dmode
370 };
371
372 static const match_table_t tokens = {
373 {Opt_novrs, "novrs"},
374 {Opt_nostrict, "nostrict"},
375 {Opt_bs, "bs=%u"},
376 {Opt_unhide, "unhide"},
377 {Opt_undelete, "undelete"},
378 {Opt_noadinicb, "noadinicb"},
379 {Opt_adinicb, "adinicb"},
380 {Opt_shortad, "shortad"},
381 {Opt_longad, "longad"},
382 {Opt_uforget, "uid=forget"},
383 {Opt_uignore, "uid=ignore"},
384 {Opt_gforget, "gid=forget"},
385 {Opt_gignore, "gid=ignore"},
386 {Opt_gid, "gid=%u"},
387 {Opt_uid, "uid=%u"},
388 {Opt_umask, "umask=%o"},
389 {Opt_session, "session=%u"},
390 {Opt_lastblock, "lastblock=%u"},
391 {Opt_anchor, "anchor=%u"},
392 {Opt_volume, "volume=%u"},
393 {Opt_partition, "partition=%u"},
394 {Opt_fileset, "fileset=%u"},
395 {Opt_rootdir, "rootdir=%u"},
396 {Opt_utf8, "utf8"},
397 {Opt_iocharset, "iocharset=%s"},
398 {Opt_fmode, "mode=%o"},
399 {Opt_dmode, "dmode=%o"},
400 {Opt_err, NULL}
401 };
402
403 static int udf_parse_options(char *options, struct udf_options *uopt,
404 bool remount)
405 {
406 char *p;
407 int option;
408
409 uopt->novrs = 0;
410 uopt->partition = 0xFFFF;
411 uopt->session = 0xFFFFFFFF;
412 uopt->lastblock = 0;
413 uopt->anchor = 0;
414 uopt->volume = 0xFFFFFFFF;
415 uopt->rootdir = 0xFFFFFFFF;
416 uopt->fileset = 0xFFFFFFFF;
417 uopt->nls_map = NULL;
418
419 if (!options)
420 return 1;
421
422 while ((p = strsep(&options, ",")) != NULL) {
423 substring_t args[MAX_OPT_ARGS];
424 int token;
425 if (!*p)
426 continue;
427
428 token = match_token(p, tokens, args);
429 switch (token) {
430 case Opt_novrs:
431 uopt->novrs = 1;
432 break;
433 case Opt_bs:
434 if (match_int(&args[0], &option))
435 return 0;
436 uopt->blocksize = option;
437 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
438 break;
439 case Opt_unhide:
440 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
441 break;
442 case Opt_undelete:
443 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
444 break;
445 case Opt_noadinicb:
446 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
447 break;
448 case Opt_adinicb:
449 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
450 break;
451 case Opt_shortad:
452 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
453 break;
454 case Opt_longad:
455 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
456 break;
457 case Opt_gid:
458 if (match_int(args, &option))
459 return 0;
460 uopt->gid = option;
461 uopt->flags |= (1 << UDF_FLAG_GID_SET);
462 break;
463 case Opt_uid:
464 if (match_int(args, &option))
465 return 0;
466 uopt->uid = option;
467 uopt->flags |= (1 << UDF_FLAG_UID_SET);
468 break;
469 case Opt_umask:
470 if (match_octal(args, &option))
471 return 0;
472 uopt->umask = option;
473 break;
474 case Opt_nostrict:
475 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
476 break;
477 case Opt_session:
478 if (match_int(args, &option))
479 return 0;
480 uopt->session = option;
481 if (!remount)
482 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
483 break;
484 case Opt_lastblock:
485 if (match_int(args, &option))
486 return 0;
487 uopt->lastblock = option;
488 if (!remount)
489 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
490 break;
491 case Opt_anchor:
492 if (match_int(args, &option))
493 return 0;
494 uopt->anchor = option;
495 break;
496 case Opt_volume:
497 if (match_int(args, &option))
498 return 0;
499 uopt->volume = option;
500 break;
501 case Opt_partition:
502 if (match_int(args, &option))
503 return 0;
504 uopt->partition = option;
505 break;
506 case Opt_fileset:
507 if (match_int(args, &option))
508 return 0;
509 uopt->fileset = option;
510 break;
511 case Opt_rootdir:
512 if (match_int(args, &option))
513 return 0;
514 uopt->rootdir = option;
515 break;
516 case Opt_utf8:
517 uopt->flags |= (1 << UDF_FLAG_UTF8);
518 break;
519 #ifdef CONFIG_UDF_NLS
520 case Opt_iocharset:
521 uopt->nls_map = load_nls(args[0].from);
522 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
523 break;
524 #endif
525 case Opt_uignore:
526 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
527 break;
528 case Opt_uforget:
529 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
530 break;
531 case Opt_gignore:
532 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
533 break;
534 case Opt_gforget:
535 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
536 break;
537 case Opt_fmode:
538 if (match_octal(args, &option))
539 return 0;
540 uopt->fmode = option & 0777;
541 break;
542 case Opt_dmode:
543 if (match_octal(args, &option))
544 return 0;
545 uopt->dmode = option & 0777;
546 break;
547 default:
548 printk(KERN_ERR "udf: bad mount option \"%s\" "
549 "or missing value\n", p);
550 return 0;
551 }
552 }
553 return 1;
554 }
555
556 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
557 {
558 struct udf_options uopt;
559 struct udf_sb_info *sbi = UDF_SB(sb);
560 int error = 0;
561
562 uopt.flags = sbi->s_flags;
563 uopt.uid = sbi->s_uid;
564 uopt.gid = sbi->s_gid;
565 uopt.umask = sbi->s_umask;
566 uopt.fmode = sbi->s_fmode;
567 uopt.dmode = sbi->s_dmode;
568
569 if (!udf_parse_options(options, &uopt, true))
570 return -EINVAL;
571
572 lock_kernel();
573 sbi->s_flags = uopt.flags;
574 sbi->s_uid = uopt.uid;
575 sbi->s_gid = uopt.gid;
576 sbi->s_umask = uopt.umask;
577 sbi->s_fmode = uopt.fmode;
578 sbi->s_dmode = uopt.dmode;
579
580 if (sbi->s_lvid_bh) {
581 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
582 if (write_rev > UDF_MAX_WRITE_VERSION)
583 *flags |= MS_RDONLY;
584 }
585
586 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
587 goto out_unlock;
588
589 if (*flags & MS_RDONLY)
590 udf_close_lvid(sb);
591 else
592 udf_open_lvid(sb);
593
594 out_unlock:
595 unlock_kernel();
596 return error;
597 }
598
599 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
600 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
601 static loff_t udf_check_vsd(struct super_block *sb)
602 {
603 struct volStructDesc *vsd = NULL;
604 loff_t sector = 32768;
605 int sectorsize;
606 struct buffer_head *bh = NULL;
607 int nsr02 = 0;
608 int nsr03 = 0;
609 struct udf_sb_info *sbi;
610
611 sbi = UDF_SB(sb);
612 if (sb->s_blocksize < sizeof(struct volStructDesc))
613 sectorsize = sizeof(struct volStructDesc);
614 else
615 sectorsize = sb->s_blocksize;
616
617 sector += (sbi->s_session << sb->s_blocksize_bits);
618
619 udf_debug("Starting at sector %u (%ld byte sectors)\n",
620 (unsigned int)(sector >> sb->s_blocksize_bits),
621 sb->s_blocksize);
622 /* Process the sequence (if applicable) */
623 for (; !nsr02 && !nsr03; sector += sectorsize) {
624 /* Read a block */
625 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
626 if (!bh)
627 break;
628
629 /* Look for ISO descriptors */
630 vsd = (struct volStructDesc *)(bh->b_data +
631 (sector & (sb->s_blocksize - 1)));
632
633 if (vsd->stdIdent[0] == 0) {
634 brelse(bh);
635 break;
636 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
637 VSD_STD_ID_LEN)) {
638 switch (vsd->structType) {
639 case 0:
640 udf_debug("ISO9660 Boot Record found\n");
641 break;
642 case 1:
643 udf_debug("ISO9660 Primary Volume Descriptor "
644 "found\n");
645 break;
646 case 2:
647 udf_debug("ISO9660 Supplementary Volume "
648 "Descriptor found\n");
649 break;
650 case 3:
651 udf_debug("ISO9660 Volume Partition Descriptor "
652 "found\n");
653 break;
654 case 255:
655 udf_debug("ISO9660 Volume Descriptor Set "
656 "Terminator found\n");
657 break;
658 default:
659 udf_debug("ISO9660 VRS (%u) found\n",
660 vsd->structType);
661 break;
662 }
663 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
664 VSD_STD_ID_LEN))
665 ; /* nothing */
666 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
667 VSD_STD_ID_LEN)) {
668 brelse(bh);
669 break;
670 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
671 VSD_STD_ID_LEN))
672 nsr02 = sector;
673 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
674 VSD_STD_ID_LEN))
675 nsr03 = sector;
676 brelse(bh);
677 }
678
679 if (nsr03)
680 return nsr03;
681 else if (nsr02)
682 return nsr02;
683 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
684 return -1;
685 else
686 return 0;
687 }
688
689 static int udf_find_fileset(struct super_block *sb,
690 struct kernel_lb_addr *fileset,
691 struct kernel_lb_addr *root)
692 {
693 struct buffer_head *bh = NULL;
694 long lastblock;
695 uint16_t ident;
696 struct udf_sb_info *sbi;
697
698 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
699 fileset->partitionReferenceNum != 0xFFFF) {
700 bh = udf_read_ptagged(sb, fileset, 0, &ident);
701
702 if (!bh) {
703 return 1;
704 } else if (ident != TAG_IDENT_FSD) {
705 brelse(bh);
706 return 1;
707 }
708
709 }
710
711 sbi = UDF_SB(sb);
712 if (!bh) {
713 /* Search backwards through the partitions */
714 struct kernel_lb_addr newfileset;
715
716 /* --> cvg: FIXME - is it reasonable? */
717 return 1;
718
719 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
720 (newfileset.partitionReferenceNum != 0xFFFF &&
721 fileset->logicalBlockNum == 0xFFFFFFFF &&
722 fileset->partitionReferenceNum == 0xFFFF);
723 newfileset.partitionReferenceNum--) {
724 lastblock = sbi->s_partmaps
725 [newfileset.partitionReferenceNum]
726 .s_partition_len;
727 newfileset.logicalBlockNum = 0;
728
729 do {
730 bh = udf_read_ptagged(sb, &newfileset, 0,
731 &ident);
732 if (!bh) {
733 newfileset.logicalBlockNum++;
734 continue;
735 }
736
737 switch (ident) {
738 case TAG_IDENT_SBD:
739 {
740 struct spaceBitmapDesc *sp;
741 sp = (struct spaceBitmapDesc *)
742 bh->b_data;
743 newfileset.logicalBlockNum += 1 +
744 ((le32_to_cpu(sp->numOfBytes) +
745 sizeof(struct spaceBitmapDesc)
746 - 1) >> sb->s_blocksize_bits);
747 brelse(bh);
748 break;
749 }
750 case TAG_IDENT_FSD:
751 *fileset = newfileset;
752 break;
753 default:
754 newfileset.logicalBlockNum++;
755 brelse(bh);
756 bh = NULL;
757 break;
758 }
759 } while (newfileset.logicalBlockNum < lastblock &&
760 fileset->logicalBlockNum == 0xFFFFFFFF &&
761 fileset->partitionReferenceNum == 0xFFFF);
762 }
763 }
764
765 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
766 fileset->partitionReferenceNum != 0xFFFF) && bh) {
767 udf_debug("Fileset at block=%d, partition=%d\n",
768 fileset->logicalBlockNum,
769 fileset->partitionReferenceNum);
770
771 sbi->s_partition = fileset->partitionReferenceNum;
772 udf_load_fileset(sb, bh, root);
773 brelse(bh);
774 return 0;
775 }
776 return 1;
777 }
778
779 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
780 {
781 struct primaryVolDesc *pvoldesc;
782 struct ustr *instr, *outstr;
783 struct buffer_head *bh;
784 uint16_t ident;
785 int ret = 1;
786
787 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
788 if (!instr)
789 return 1;
790
791 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
792 if (!outstr)
793 goto out1;
794
795 bh = udf_read_tagged(sb, block, block, &ident);
796 if (!bh)
797 goto out2;
798
799 BUG_ON(ident != TAG_IDENT_PVD);
800
801 pvoldesc = (struct primaryVolDesc *)bh->b_data;
802
803 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
804 pvoldesc->recordingDateAndTime)) {
805 #ifdef UDFFS_DEBUG
806 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
807 udf_debug("recording time %04u/%02u/%02u"
808 " %02u:%02u (%x)\n",
809 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
810 ts->minute, le16_to_cpu(ts->typeAndTimezone));
811 #endif
812 }
813
814 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
815 if (udf_CS0toUTF8(outstr, instr)) {
816 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
817 outstr->u_len > 31 ? 31 : outstr->u_len);
818 udf_debug("volIdent[] = '%s'\n",
819 UDF_SB(sb)->s_volume_ident);
820 }
821
822 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
823 if (udf_CS0toUTF8(outstr, instr))
824 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
825
826 brelse(bh);
827 ret = 0;
828 out2:
829 kfree(outstr);
830 out1:
831 kfree(instr);
832 return ret;
833 }
834
835 static int udf_load_metadata_files(struct super_block *sb, int partition)
836 {
837 struct udf_sb_info *sbi = UDF_SB(sb);
838 struct udf_part_map *map;
839 struct udf_meta_data *mdata;
840 struct kernel_lb_addr addr;
841 int fe_error = 0;
842
843 map = &sbi->s_partmaps[partition];
844 mdata = &map->s_type_specific.s_metadata;
845
846 /* metadata address */
847 addr.logicalBlockNum = mdata->s_meta_file_loc;
848 addr.partitionReferenceNum = map->s_partition_num;
849
850 udf_debug("Metadata file location: block = %d part = %d\n",
851 addr.logicalBlockNum, addr.partitionReferenceNum);
852
853 mdata->s_metadata_fe = udf_iget(sb, &addr);
854
855 if (mdata->s_metadata_fe == NULL) {
856 udf_warning(sb, __func__, "metadata inode efe not found, "
857 "will try mirror inode.");
858 fe_error = 1;
859 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
860 ICBTAG_FLAG_AD_SHORT) {
861 udf_warning(sb, __func__, "metadata inode efe does not have "
862 "short allocation descriptors!");
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_error(sb, __func__, "mirror inode efe not found "
880 "and metadata inode is missing too, exiting...");
881 goto error_exit;
882 } else
883 udf_warning(sb, __func__, "mirror inode efe not found,"
884 " but metadata inode is OK");
885 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
886 ICBTAG_FLAG_AD_SHORT) {
887 udf_warning(sb, __func__, "mirror inode efe does not have "
888 "short allocation descriptors!");
889 iput(mdata->s_mirror_fe);
890 mdata->s_mirror_fe = NULL;
891 if (fe_error)
892 goto error_exit;
893 }
894
895 /*
896 * bitmap file entry
897 * Note:
898 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
899 */
900 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
901 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
902 addr.partitionReferenceNum = map->s_partition_num;
903
904 udf_debug("Bitmap file location: block = %d part = %d\n",
905 addr.logicalBlockNum, addr.partitionReferenceNum);
906
907 mdata->s_bitmap_fe = udf_iget(sb, &addr);
908
909 if (mdata->s_bitmap_fe == NULL) {
910 if (sb->s_flags & MS_RDONLY)
911 udf_warning(sb, __func__, "bitmap inode efe "
912 "not found but it's ok since the disc"
913 " is mounted read-only");
914 else {
915 udf_error(sb, __func__, "bitmap inode efe not "
916 "found and attempted read-write mount");
917 goto error_exit;
918 }
919 }
920 }
921
922 udf_debug("udf_load_metadata_files Ok\n");
923
924 return 0;
925
926 error_exit:
927 return 1;
928 }
929
930 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
931 struct kernel_lb_addr *root)
932 {
933 struct fileSetDesc *fset;
934
935 fset = (struct fileSetDesc *)bh->b_data;
936
937 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
938
939 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
940
941 udf_debug("Rootdir at block=%d, partition=%d\n",
942 root->logicalBlockNum, root->partitionReferenceNum);
943 }
944
945 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
946 {
947 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
948 return DIV_ROUND_UP(map->s_partition_len +
949 (sizeof(struct spaceBitmapDesc) << 3),
950 sb->s_blocksize * 8);
951 }
952
953 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
954 {
955 struct udf_bitmap *bitmap;
956 int nr_groups;
957 int size;
958
959 nr_groups = udf_compute_nr_groups(sb, index);
960 size = sizeof(struct udf_bitmap) +
961 (sizeof(struct buffer_head *) * nr_groups);
962
963 if (size <= PAGE_SIZE)
964 bitmap = kmalloc(size, GFP_KERNEL);
965 else
966 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
967
968 if (bitmap == NULL) {
969 udf_error(sb, __func__,
970 "Unable to allocate space for bitmap "
971 "and %d buffer_head pointers", nr_groups);
972 return NULL;
973 }
974
975 memset(bitmap, 0x00, size);
976 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
977 bitmap->s_nr_groups = nr_groups;
978 return bitmap;
979 }
980
981 static int udf_fill_partdesc_info(struct super_block *sb,
982 struct partitionDesc *p, int p_index)
983 {
984 struct udf_part_map *map;
985 struct udf_sb_info *sbi = UDF_SB(sb);
986 struct partitionHeaderDesc *phd;
987
988 map = &sbi->s_partmaps[p_index];
989
990 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
991 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
992
993 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
994 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
995 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
996 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
997 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
998 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
999 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1000 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1001
1002 udf_debug("Partition (%d type %x) starts at physical %d, "
1003 "block length %d\n", p_index,
1004 map->s_partition_type, map->s_partition_root,
1005 map->s_partition_len);
1006
1007 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1008 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1009 return 0;
1010
1011 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1012 if (phd->unallocSpaceTable.extLength) {
1013 struct kernel_lb_addr loc = {
1014 .logicalBlockNum = le32_to_cpu(
1015 phd->unallocSpaceTable.extPosition),
1016 .partitionReferenceNum = p_index,
1017 };
1018
1019 map->s_uspace.s_table = udf_iget(sb, &loc);
1020 if (!map->s_uspace.s_table) {
1021 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1022 p_index);
1023 return 1;
1024 }
1025 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1026 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1027 p_index, map->s_uspace.s_table->i_ino);
1028 }
1029
1030 if (phd->unallocSpaceBitmap.extLength) {
1031 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1032 if (!bitmap)
1033 return 1;
1034 map->s_uspace.s_bitmap = bitmap;
1035 bitmap->s_extLength = le32_to_cpu(
1036 phd->unallocSpaceBitmap.extLength);
1037 bitmap->s_extPosition = le32_to_cpu(
1038 phd->unallocSpaceBitmap.extPosition);
1039 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1040 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1041 bitmap->s_extPosition);
1042 }
1043
1044 if (phd->partitionIntegrityTable.extLength)
1045 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1046
1047 if (phd->freedSpaceTable.extLength) {
1048 struct kernel_lb_addr loc = {
1049 .logicalBlockNum = le32_to_cpu(
1050 phd->freedSpaceTable.extPosition),
1051 .partitionReferenceNum = p_index,
1052 };
1053
1054 map->s_fspace.s_table = udf_iget(sb, &loc);
1055 if (!map->s_fspace.s_table) {
1056 udf_debug("cannot load freedSpaceTable (part %d)\n",
1057 p_index);
1058 return 1;
1059 }
1060
1061 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1062 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1063 p_index, map->s_fspace.s_table->i_ino);
1064 }
1065
1066 if (phd->freedSpaceBitmap.extLength) {
1067 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1068 if (!bitmap)
1069 return 1;
1070 map->s_fspace.s_bitmap = bitmap;
1071 bitmap->s_extLength = le32_to_cpu(
1072 phd->freedSpaceBitmap.extLength);
1073 bitmap->s_extPosition = le32_to_cpu(
1074 phd->freedSpaceBitmap.extPosition);
1075 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1076 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1077 bitmap->s_extPosition);
1078 }
1079 return 0;
1080 }
1081
1082 static void udf_find_vat_block(struct super_block *sb, int p_index,
1083 int type1_index, sector_t start_block)
1084 {
1085 struct udf_sb_info *sbi = UDF_SB(sb);
1086 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1087 sector_t vat_block;
1088 struct kernel_lb_addr ino;
1089
1090 /*
1091 * VAT file entry is in the last recorded block. Some broken disks have
1092 * it a few blocks before so try a bit harder...
1093 */
1094 ino.partitionReferenceNum = type1_index;
1095 for (vat_block = start_block;
1096 vat_block >= map->s_partition_root &&
1097 vat_block >= start_block - 3 &&
1098 !sbi->s_vat_inode; vat_block--) {
1099 ino.logicalBlockNum = vat_block - map->s_partition_root;
1100 sbi->s_vat_inode = udf_iget(sb, &ino);
1101 }
1102 }
1103
1104 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1105 {
1106 struct udf_sb_info *sbi = UDF_SB(sb);
1107 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1108 struct buffer_head *bh = NULL;
1109 struct udf_inode_info *vati;
1110 uint32_t pos;
1111 struct virtualAllocationTable20 *vat20;
1112 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1113
1114 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1115 if (!sbi->s_vat_inode &&
1116 sbi->s_last_block != blocks - 1) {
1117 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1118 " last recorded block (%lu), retrying with the last "
1119 "block of the device (%lu).\n",
1120 (unsigned long)sbi->s_last_block,
1121 (unsigned long)blocks - 1);
1122 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1123 }
1124 if (!sbi->s_vat_inode)
1125 return 1;
1126
1127 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1128 map->s_type_specific.s_virtual.s_start_offset = 0;
1129 map->s_type_specific.s_virtual.s_num_entries =
1130 (sbi->s_vat_inode->i_size - 36) >> 2;
1131 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1132 vati = UDF_I(sbi->s_vat_inode);
1133 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1134 pos = udf_block_map(sbi->s_vat_inode, 0);
1135 bh = sb_bread(sb, pos);
1136 if (!bh)
1137 return 1;
1138 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1139 } else {
1140 vat20 = (struct virtualAllocationTable20 *)
1141 vati->i_ext.i_data;
1142 }
1143
1144 map->s_type_specific.s_virtual.s_start_offset =
1145 le16_to_cpu(vat20->lengthHeader);
1146 map->s_type_specific.s_virtual.s_num_entries =
1147 (sbi->s_vat_inode->i_size -
1148 map->s_type_specific.s_virtual.
1149 s_start_offset) >> 2;
1150 brelse(bh);
1151 }
1152 return 0;
1153 }
1154
1155 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1156 {
1157 struct buffer_head *bh;
1158 struct partitionDesc *p;
1159 struct udf_part_map *map;
1160 struct udf_sb_info *sbi = UDF_SB(sb);
1161 int i, type1_idx;
1162 uint16_t partitionNumber;
1163 uint16_t ident;
1164 int ret = 0;
1165
1166 bh = udf_read_tagged(sb, block, block, &ident);
1167 if (!bh)
1168 return 1;
1169 if (ident != TAG_IDENT_PD)
1170 goto out_bh;
1171
1172 p = (struct partitionDesc *)bh->b_data;
1173 partitionNumber = le16_to_cpu(p->partitionNumber);
1174
1175 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1176 for (i = 0; i < sbi->s_partitions; i++) {
1177 map = &sbi->s_partmaps[i];
1178 udf_debug("Searching map: (%d == %d)\n",
1179 map->s_partition_num, partitionNumber);
1180 if (map->s_partition_num == partitionNumber &&
1181 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1182 map->s_partition_type == UDF_SPARABLE_MAP15))
1183 break;
1184 }
1185
1186 if (i >= sbi->s_partitions) {
1187 udf_debug("Partition (%d) not found in partition map\n",
1188 partitionNumber);
1189 goto out_bh;
1190 }
1191
1192 ret = udf_fill_partdesc_info(sb, p, i);
1193
1194 /*
1195 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1196 * PHYSICAL partitions are already set up
1197 */
1198 type1_idx = i;
1199 for (i = 0; i < sbi->s_partitions; i++) {
1200 map = &sbi->s_partmaps[i];
1201
1202 if (map->s_partition_num == partitionNumber &&
1203 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1204 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1205 map->s_partition_type == UDF_METADATA_MAP25))
1206 break;
1207 }
1208
1209 if (i >= sbi->s_partitions)
1210 goto out_bh;
1211
1212 ret = udf_fill_partdesc_info(sb, p, i);
1213 if (ret)
1214 goto out_bh;
1215
1216 if (map->s_partition_type == UDF_METADATA_MAP25) {
1217 ret = udf_load_metadata_files(sb, i);
1218 if (ret) {
1219 printk(KERN_ERR "UDF-fs: error loading MetaData "
1220 "partition map %d\n", i);
1221 goto out_bh;
1222 }
1223 } else {
1224 ret = udf_load_vat(sb, i, type1_idx);
1225 if (ret)
1226 goto out_bh;
1227 /*
1228 * Mark filesystem read-only if we have a partition with
1229 * virtual map since we don't handle writing to it (we
1230 * overwrite blocks instead of relocating them).
1231 */
1232 sb->s_flags |= MS_RDONLY;
1233 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1234 "because writing to pseudooverwrite partition is "
1235 "not implemented.\n");
1236 }
1237 out_bh:
1238 /* In case loading failed, we handle cleanup in udf_fill_super */
1239 brelse(bh);
1240 return ret;
1241 }
1242
1243 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1244 struct kernel_lb_addr *fileset)
1245 {
1246 struct logicalVolDesc *lvd;
1247 int i, j, offset;
1248 uint8_t type;
1249 struct udf_sb_info *sbi = UDF_SB(sb);
1250 struct genericPartitionMap *gpm;
1251 uint16_t ident;
1252 struct buffer_head *bh;
1253 int ret = 0;
1254
1255 bh = udf_read_tagged(sb, block, block, &ident);
1256 if (!bh)
1257 return 1;
1258 BUG_ON(ident != TAG_IDENT_LVD);
1259 lvd = (struct logicalVolDesc *)bh->b_data;
1260
1261 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1262 if (i != 0) {
1263 ret = i;
1264 goto out_bh;
1265 }
1266
1267 for (i = 0, offset = 0;
1268 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1269 i++, offset += gpm->partitionMapLength) {
1270 struct udf_part_map *map = &sbi->s_partmaps[i];
1271 gpm = (struct genericPartitionMap *)
1272 &(lvd->partitionMaps[offset]);
1273 type = gpm->partitionMapType;
1274 if (type == 1) {
1275 struct genericPartitionMap1 *gpm1 =
1276 (struct genericPartitionMap1 *)gpm;
1277 map->s_partition_type = UDF_TYPE1_MAP15;
1278 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1279 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1280 map->s_partition_func = NULL;
1281 } else if (type == 2) {
1282 struct udfPartitionMap2 *upm2 =
1283 (struct udfPartitionMap2 *)gpm;
1284 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1285 strlen(UDF_ID_VIRTUAL))) {
1286 u16 suf =
1287 le16_to_cpu(((__le16 *)upm2->partIdent.
1288 identSuffix)[0]);
1289 if (suf < 0x0200) {
1290 map->s_partition_type =
1291 UDF_VIRTUAL_MAP15;
1292 map->s_partition_func =
1293 udf_get_pblock_virt15;
1294 } else {
1295 map->s_partition_type =
1296 UDF_VIRTUAL_MAP20;
1297 map->s_partition_func =
1298 udf_get_pblock_virt20;
1299 }
1300 } else if (!strncmp(upm2->partIdent.ident,
1301 UDF_ID_SPARABLE,
1302 strlen(UDF_ID_SPARABLE))) {
1303 uint32_t loc;
1304 struct sparingTable *st;
1305 struct sparablePartitionMap *spm =
1306 (struct sparablePartitionMap *)gpm;
1307
1308 map->s_partition_type = UDF_SPARABLE_MAP15;
1309 map->s_type_specific.s_sparing.s_packet_len =
1310 le16_to_cpu(spm->packetLength);
1311 for (j = 0; j < spm->numSparingTables; j++) {
1312 struct buffer_head *bh2;
1313
1314 loc = le32_to_cpu(
1315 spm->locSparingTable[j]);
1316 bh2 = udf_read_tagged(sb, loc, loc,
1317 &ident);
1318 map->s_type_specific.s_sparing.
1319 s_spar_map[j] = bh2;
1320
1321 if (bh2 == NULL)
1322 continue;
1323
1324 st = (struct sparingTable *)bh2->b_data;
1325 if (ident != 0 || strncmp(
1326 st->sparingIdent.ident,
1327 UDF_ID_SPARING,
1328 strlen(UDF_ID_SPARING))) {
1329 brelse(bh2);
1330 map->s_type_specific.s_sparing.
1331 s_spar_map[j] = NULL;
1332 }
1333 }
1334 map->s_partition_func = udf_get_pblock_spar15;
1335 } else if (!strncmp(upm2->partIdent.ident,
1336 UDF_ID_METADATA,
1337 strlen(UDF_ID_METADATA))) {
1338 struct udf_meta_data *mdata =
1339 &map->s_type_specific.s_metadata;
1340 struct metadataPartitionMap *mdm =
1341 (struct metadataPartitionMap *)
1342 &(lvd->partitionMaps[offset]);
1343 udf_debug("Parsing Logical vol part %d "
1344 "type %d id=%s\n", i, type,
1345 UDF_ID_METADATA);
1346
1347 map->s_partition_type = UDF_METADATA_MAP25;
1348 map->s_partition_func = udf_get_pblock_meta25;
1349
1350 mdata->s_meta_file_loc =
1351 le32_to_cpu(mdm->metadataFileLoc);
1352 mdata->s_mirror_file_loc =
1353 le32_to_cpu(mdm->metadataMirrorFileLoc);
1354 mdata->s_bitmap_file_loc =
1355 le32_to_cpu(mdm->metadataBitmapFileLoc);
1356 mdata->s_alloc_unit_size =
1357 le32_to_cpu(mdm->allocUnitSize);
1358 mdata->s_align_unit_size =
1359 le16_to_cpu(mdm->alignUnitSize);
1360 mdata->s_dup_md_flag =
1361 mdm->flags & 0x01;
1362
1363 udf_debug("Metadata Ident suffix=0x%x\n",
1364 (le16_to_cpu(
1365 ((__le16 *)
1366 mdm->partIdent.identSuffix)[0])));
1367 udf_debug("Metadata part num=%d\n",
1368 le16_to_cpu(mdm->partitionNum));
1369 udf_debug("Metadata part alloc unit size=%d\n",
1370 le32_to_cpu(mdm->allocUnitSize));
1371 udf_debug("Metadata file loc=%d\n",
1372 le32_to_cpu(mdm->metadataFileLoc));
1373 udf_debug("Mirror file loc=%d\n",
1374 le32_to_cpu(mdm->metadataMirrorFileLoc));
1375 udf_debug("Bitmap file loc=%d\n",
1376 le32_to_cpu(mdm->metadataBitmapFileLoc));
1377 udf_debug("Duplicate Flag: %d %d\n",
1378 mdata->s_dup_md_flag, mdm->flags);
1379 } else {
1380 udf_debug("Unknown ident: %s\n",
1381 upm2->partIdent.ident);
1382 continue;
1383 }
1384 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1385 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1386 }
1387 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1388 i, map->s_partition_num, type,
1389 map->s_volumeseqnum);
1390 }
1391
1392 if (fileset) {
1393 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1394
1395 *fileset = lelb_to_cpu(la->extLocation);
1396 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1397 "partition=%d\n", fileset->logicalBlockNum,
1398 fileset->partitionReferenceNum);
1399 }
1400 if (lvd->integritySeqExt.extLength)
1401 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1402
1403 out_bh:
1404 brelse(bh);
1405 return ret;
1406 }
1407
1408 /*
1409 * udf_load_logicalvolint
1410 *
1411 */
1412 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1413 {
1414 struct buffer_head *bh = NULL;
1415 uint16_t ident;
1416 struct udf_sb_info *sbi = UDF_SB(sb);
1417 struct logicalVolIntegrityDesc *lvid;
1418
1419 while (loc.extLength > 0 &&
1420 (bh = udf_read_tagged(sb, loc.extLocation,
1421 loc.extLocation, &ident)) &&
1422 ident == TAG_IDENT_LVID) {
1423 sbi->s_lvid_bh = bh;
1424 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1425
1426 if (lvid->nextIntegrityExt.extLength)
1427 udf_load_logicalvolint(sb,
1428 leea_to_cpu(lvid->nextIntegrityExt));
1429
1430 if (sbi->s_lvid_bh != bh)
1431 brelse(bh);
1432 loc.extLength -= sb->s_blocksize;
1433 loc.extLocation++;
1434 }
1435 if (sbi->s_lvid_bh != bh)
1436 brelse(bh);
1437 }
1438
1439 /*
1440 * udf_process_sequence
1441 *
1442 * PURPOSE
1443 * Process a main/reserve volume descriptor sequence.
1444 *
1445 * PRE-CONDITIONS
1446 * sb Pointer to _locked_ superblock.
1447 * block First block of first extent of the sequence.
1448 * lastblock Lastblock of first extent of the sequence.
1449 *
1450 * HISTORY
1451 * July 1, 1997 - Andrew E. Mileski
1452 * Written, tested, and released.
1453 */
1454 static noinline int udf_process_sequence(struct super_block *sb, long block,
1455 long lastblock, struct kernel_lb_addr *fileset)
1456 {
1457 struct buffer_head *bh = NULL;
1458 struct udf_vds_record vds[VDS_POS_LENGTH];
1459 struct udf_vds_record *curr;
1460 struct generic_desc *gd;
1461 struct volDescPtr *vdp;
1462 int done = 0;
1463 uint32_t vdsn;
1464 uint16_t ident;
1465 long next_s = 0, next_e = 0;
1466
1467 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1468
1469 /*
1470 * Read the main descriptor sequence and find which descriptors
1471 * are in it.
1472 */
1473 for (; (!done && block <= lastblock); block++) {
1474
1475 bh = udf_read_tagged(sb, block, block, &ident);
1476 if (!bh) {
1477 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1478 "sequence is corrupted or we could not read "
1479 "it.\n", (unsigned long long)block);
1480 return 1;
1481 }
1482
1483 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1484 gd = (struct generic_desc *)bh->b_data;
1485 vdsn = le32_to_cpu(gd->volDescSeqNum);
1486 switch (ident) {
1487 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1488 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1489 if (vdsn >= curr->volDescSeqNum) {
1490 curr->volDescSeqNum = vdsn;
1491 curr->block = block;
1492 }
1493 break;
1494 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1495 curr = &vds[VDS_POS_VOL_DESC_PTR];
1496 if (vdsn >= curr->volDescSeqNum) {
1497 curr->volDescSeqNum = vdsn;
1498 curr->block = block;
1499
1500 vdp = (struct volDescPtr *)bh->b_data;
1501 next_s = le32_to_cpu(
1502 vdp->nextVolDescSeqExt.extLocation);
1503 next_e = le32_to_cpu(
1504 vdp->nextVolDescSeqExt.extLength);
1505 next_e = next_e >> sb->s_blocksize_bits;
1506 next_e += next_s;
1507 }
1508 break;
1509 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1510 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1511 if (vdsn >= curr->volDescSeqNum) {
1512 curr->volDescSeqNum = vdsn;
1513 curr->block = block;
1514 }
1515 break;
1516 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1517 curr = &vds[VDS_POS_PARTITION_DESC];
1518 if (!curr->block)
1519 curr->block = block;
1520 break;
1521 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1522 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1523 if (vdsn >= curr->volDescSeqNum) {
1524 curr->volDescSeqNum = vdsn;
1525 curr->block = block;
1526 }
1527 break;
1528 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1529 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1530 if (vdsn >= curr->volDescSeqNum) {
1531 curr->volDescSeqNum = vdsn;
1532 curr->block = block;
1533 }
1534 break;
1535 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1536 vds[VDS_POS_TERMINATING_DESC].block = block;
1537 if (next_e) {
1538 block = next_s;
1539 lastblock = next_e;
1540 next_s = next_e = 0;
1541 } else
1542 done = 1;
1543 break;
1544 }
1545 brelse(bh);
1546 }
1547 /*
1548 * Now read interesting descriptors again and process them
1549 * in a suitable order
1550 */
1551 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1552 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1553 return 1;
1554 }
1555 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1556 return 1;
1557
1558 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1559 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1560 return 1;
1561
1562 if (vds[VDS_POS_PARTITION_DESC].block) {
1563 /*
1564 * We rescan the whole descriptor sequence to find
1565 * partition descriptor blocks and process them.
1566 */
1567 for (block = vds[VDS_POS_PARTITION_DESC].block;
1568 block < vds[VDS_POS_TERMINATING_DESC].block;
1569 block++)
1570 if (udf_load_partdesc(sb, block))
1571 return 1;
1572 }
1573
1574 return 0;
1575 }
1576
1577 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1578 struct kernel_lb_addr *fileset)
1579 {
1580 struct anchorVolDescPtr *anchor;
1581 long main_s, main_e, reserve_s, reserve_e;
1582 struct udf_sb_info *sbi;
1583
1584 sbi = UDF_SB(sb);
1585 anchor = (struct anchorVolDescPtr *)bh->b_data;
1586
1587 /* Locate the main sequence */
1588 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1589 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1590 main_e = main_e >> sb->s_blocksize_bits;
1591 main_e += main_s;
1592
1593 /* Locate the reserve sequence */
1594 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1595 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1596 reserve_e = reserve_e >> sb->s_blocksize_bits;
1597 reserve_e += reserve_s;
1598
1599 /* Process the main & reserve sequences */
1600 /* responsible for finding the PartitionDesc(s) */
1601 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1602 return 1;
1603 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1604 }
1605
1606 /*
1607 * Check whether there is an anchor block in the given block and
1608 * load Volume Descriptor Sequence if so.
1609 */
1610 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1611 struct kernel_lb_addr *fileset)
1612 {
1613 struct buffer_head *bh;
1614 uint16_t ident;
1615 int ret;
1616
1617 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1618 udf_fixed_to_variable(block) >=
1619 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1620 return 0;
1621
1622 bh = udf_read_tagged(sb, block, block, &ident);
1623 if (!bh)
1624 return 0;
1625 if (ident != TAG_IDENT_AVDP) {
1626 brelse(bh);
1627 return 0;
1628 }
1629 ret = udf_load_sequence(sb, bh, fileset);
1630 brelse(bh);
1631 return ret;
1632 }
1633
1634 /* Search for an anchor volume descriptor pointer */
1635 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1636 struct kernel_lb_addr *fileset)
1637 {
1638 sector_t last[6];
1639 int i;
1640 struct udf_sb_info *sbi = UDF_SB(sb);
1641 int last_count = 0;
1642
1643 /* First try user provided anchor */
1644 if (sbi->s_anchor) {
1645 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1646 return lastblock;
1647 }
1648 /*
1649 * according to spec, anchor is in either:
1650 * block 256
1651 * lastblock-256
1652 * lastblock
1653 * however, if the disc isn't closed, it could be 512.
1654 */
1655 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1656 return lastblock;
1657 /*
1658 * The trouble is which block is the last one. Drives often misreport
1659 * this so we try various possibilities.
1660 */
1661 last[last_count++] = lastblock;
1662 if (lastblock >= 1)
1663 last[last_count++] = lastblock - 1;
1664 last[last_count++] = lastblock + 1;
1665 if (lastblock >= 2)
1666 last[last_count++] = lastblock - 2;
1667 if (lastblock >= 150)
1668 last[last_count++] = lastblock - 150;
1669 if (lastblock >= 152)
1670 last[last_count++] = lastblock - 152;
1671
1672 for (i = 0; i < last_count; i++) {
1673 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1674 sb->s_blocksize_bits)
1675 continue;
1676 if (udf_check_anchor_block(sb, last[i], fileset))
1677 return last[i];
1678 if (last[i] < 256)
1679 continue;
1680 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1681 return last[i];
1682 }
1683
1684 /* Finally try block 512 in case media is open */
1685 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1686 return last[0];
1687 return 0;
1688 }
1689
1690 /*
1691 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1692 * area specified by it. The function expects sbi->s_lastblock to be the last
1693 * block on the media.
1694 *
1695 * Return 1 if ok, 0 if not found.
1696 *
1697 */
1698 static int udf_find_anchor(struct super_block *sb,
1699 struct kernel_lb_addr *fileset)
1700 {
1701 sector_t lastblock;
1702 struct udf_sb_info *sbi = UDF_SB(sb);
1703
1704 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1705 if (lastblock)
1706 goto out;
1707
1708 /* No anchor found? Try VARCONV conversion of block numbers */
1709 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1710 /* Firstly, we try to not convert number of the last block */
1711 lastblock = udf_scan_anchors(sb,
1712 udf_variable_to_fixed(sbi->s_last_block),
1713 fileset);
1714 if (lastblock)
1715 goto out;
1716
1717 /* Secondly, we try with converted number of the last block */
1718 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1719 if (!lastblock) {
1720 /* VARCONV didn't help. Clear it. */
1721 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1722 return 0;
1723 }
1724 out:
1725 sbi->s_last_block = lastblock;
1726 return 1;
1727 }
1728
1729 /*
1730 * Check Volume Structure Descriptor, find Anchor block and load Volume
1731 * Descriptor Sequence
1732 */
1733 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1734 int silent, struct kernel_lb_addr *fileset)
1735 {
1736 struct udf_sb_info *sbi = UDF_SB(sb);
1737 loff_t nsr_off;
1738
1739 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1740 if (!silent)
1741 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1742 return 0;
1743 }
1744 sbi->s_last_block = uopt->lastblock;
1745 if (!uopt->novrs) {
1746 /* Check that it is NSR02 compliant */
1747 nsr_off = udf_check_vsd(sb);
1748 if (!nsr_off) {
1749 if (!silent)
1750 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1751 return 0;
1752 }
1753 if (nsr_off == -1)
1754 udf_debug("Failed to read byte 32768. Assuming open "
1755 "disc. Skipping validity check\n");
1756 if (!sbi->s_last_block)
1757 sbi->s_last_block = udf_get_last_block(sb);
1758 } else {
1759 udf_debug("Validity check skipped because of novrs option\n");
1760 }
1761
1762 /* Look for anchor block and load Volume Descriptor Sequence */
1763 sbi->s_anchor = uopt->anchor;
1764 if (!udf_find_anchor(sb, fileset)) {
1765 if (!silent)
1766 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1767 return 0;
1768 }
1769 return 1;
1770 }
1771
1772 static void udf_open_lvid(struct super_block *sb)
1773 {
1774 struct udf_sb_info *sbi = UDF_SB(sb);
1775 struct buffer_head *bh = sbi->s_lvid_bh;
1776 struct logicalVolIntegrityDesc *lvid;
1777 struct logicalVolIntegrityDescImpUse *lvidiu;
1778
1779 if (!bh)
1780 return;
1781 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1782 lvidiu = udf_sb_lvidiu(sbi);
1783
1784 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1785 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1786 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1787 CURRENT_TIME);
1788 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1789
1790 lvid->descTag.descCRC = cpu_to_le16(
1791 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1792 le16_to_cpu(lvid->descTag.descCRCLength)));
1793
1794 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1795 mark_buffer_dirty(bh);
1796 sbi->s_lvid_dirty = 0;
1797 }
1798
1799 static void udf_close_lvid(struct super_block *sb)
1800 {
1801 struct udf_sb_info *sbi = UDF_SB(sb);
1802 struct buffer_head *bh = sbi->s_lvid_bh;
1803 struct logicalVolIntegrityDesc *lvid;
1804 struct logicalVolIntegrityDescImpUse *lvidiu;
1805
1806 if (!bh)
1807 return;
1808
1809 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1810 lvidiu = udf_sb_lvidiu(sbi);
1811 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1812 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1813 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1814 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1815 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1816 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1817 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1818 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1819 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1820 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1821
1822 lvid->descTag.descCRC = cpu_to_le16(
1823 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1824 le16_to_cpu(lvid->descTag.descCRCLength)));
1825
1826 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1827 mark_buffer_dirty(bh);
1828 sbi->s_lvid_dirty = 0;
1829 }
1830
1831 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1832 {
1833 int i;
1834 int nr_groups = bitmap->s_nr_groups;
1835 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1836 nr_groups);
1837
1838 for (i = 0; i < nr_groups; i++)
1839 if (bitmap->s_block_bitmap[i])
1840 brelse(bitmap->s_block_bitmap[i]);
1841
1842 if (size <= PAGE_SIZE)
1843 kfree(bitmap);
1844 else
1845 vfree(bitmap);
1846 }
1847
1848 static void udf_free_partition(struct udf_part_map *map)
1849 {
1850 int i;
1851 struct udf_meta_data *mdata;
1852
1853 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1854 iput(map->s_uspace.s_table);
1855 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1856 iput(map->s_fspace.s_table);
1857 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1858 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1859 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1860 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1861 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1862 for (i = 0; i < 4; i++)
1863 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1864 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1865 mdata = &map->s_type_specific.s_metadata;
1866 iput(mdata->s_metadata_fe);
1867 mdata->s_metadata_fe = NULL;
1868
1869 iput(mdata->s_mirror_fe);
1870 mdata->s_mirror_fe = NULL;
1871
1872 iput(mdata->s_bitmap_fe);
1873 mdata->s_bitmap_fe = NULL;
1874 }
1875 }
1876
1877 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1878 {
1879 int i;
1880 int ret;
1881 struct inode *inode = NULL;
1882 struct udf_options uopt;
1883 struct kernel_lb_addr rootdir, fileset;
1884 struct udf_sb_info *sbi;
1885
1886 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1887 uopt.uid = -1;
1888 uopt.gid = -1;
1889 uopt.umask = 0;
1890 uopt.fmode = UDF_INVALID_MODE;
1891 uopt.dmode = UDF_INVALID_MODE;
1892
1893 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1894 if (!sbi)
1895 return -ENOMEM;
1896
1897 sb->s_fs_info = sbi;
1898
1899 mutex_init(&sbi->s_alloc_mutex);
1900
1901 if (!udf_parse_options((char *)options, &uopt, false))
1902 goto error_out;
1903
1904 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1905 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1906 udf_error(sb, "udf_read_super",
1907 "utf8 cannot be combined with iocharset\n");
1908 goto error_out;
1909 }
1910 #ifdef CONFIG_UDF_NLS
1911 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1912 uopt.nls_map = load_nls_default();
1913 if (!uopt.nls_map)
1914 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1915 else
1916 udf_debug("Using default NLS map\n");
1917 }
1918 #endif
1919 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1920 uopt.flags |= (1 << UDF_FLAG_UTF8);
1921
1922 fileset.logicalBlockNum = 0xFFFFFFFF;
1923 fileset.partitionReferenceNum = 0xFFFF;
1924
1925 sbi->s_flags = uopt.flags;
1926 sbi->s_uid = uopt.uid;
1927 sbi->s_gid = uopt.gid;
1928 sbi->s_umask = uopt.umask;
1929 sbi->s_fmode = uopt.fmode;
1930 sbi->s_dmode = uopt.dmode;
1931 sbi->s_nls_map = uopt.nls_map;
1932
1933 if (uopt.session == 0xFFFFFFFF)
1934 sbi->s_session = udf_get_last_session(sb);
1935 else
1936 sbi->s_session = uopt.session;
1937
1938 udf_debug("Multi-session=%d\n", sbi->s_session);
1939
1940 /* Fill in the rest of the superblock */
1941 sb->s_op = &udf_sb_ops;
1942 sb->s_export_op = &udf_export_ops;
1943
1944 sb->s_dirt = 0;
1945 sb->s_magic = UDF_SUPER_MAGIC;
1946 sb->s_time_gran = 1000;
1947
1948 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1949 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1950 } else {
1951 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
1952 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1953 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1954 if (!silent)
1955 printk(KERN_NOTICE
1956 "UDF-fs: Rescanning with blocksize "
1957 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1958 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1959 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1960 }
1961 }
1962 if (!ret) {
1963 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1964 goto error_out;
1965 }
1966
1967 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1968
1969 if (sbi->s_lvid_bh) {
1970 struct logicalVolIntegrityDescImpUse *lvidiu =
1971 udf_sb_lvidiu(sbi);
1972 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1973 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1974 /* uint16_t maxUDFWriteRev =
1975 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1976
1977 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1978 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1979 "(max is %x)\n",
1980 le16_to_cpu(lvidiu->minUDFReadRev),
1981 UDF_MAX_READ_VERSION);
1982 goto error_out;
1983 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1984 sb->s_flags |= MS_RDONLY;
1985
1986 sbi->s_udfrev = minUDFWriteRev;
1987
1988 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1989 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1990 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1991 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1992 }
1993
1994 if (!sbi->s_partitions) {
1995 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1996 goto error_out;
1997 }
1998
1999 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2000 UDF_PART_FLAG_READ_ONLY) {
2001 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2002 "forcing readonly mount\n");
2003 sb->s_flags |= MS_RDONLY;
2004 }
2005
2006 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2007 printk(KERN_WARNING "UDF-fs: No fileset found\n");
2008 goto error_out;
2009 }
2010
2011 if (!silent) {
2012 struct timestamp ts;
2013 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2014 udf_info("UDF: Mounting volume '%s', "
2015 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2016 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2017 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2018 }
2019 if (!(sb->s_flags & MS_RDONLY))
2020 udf_open_lvid(sb);
2021
2022 /* Assign the root inode */
2023 /* assign inodes by physical block number */
2024 /* perhaps it's not extensible enough, but for now ... */
2025 inode = udf_iget(sb, &rootdir);
2026 if (!inode) {
2027 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2028 "partition=%d\n",
2029 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2030 goto error_out;
2031 }
2032
2033 /* Allocate a dentry for the root inode */
2034 sb->s_root = d_alloc_root(inode);
2035 if (!sb->s_root) {
2036 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
2037 iput(inode);
2038 goto error_out;
2039 }
2040 sb->s_maxbytes = MAX_LFS_FILESIZE;
2041 return 0;
2042
2043 error_out:
2044 if (sbi->s_vat_inode)
2045 iput(sbi->s_vat_inode);
2046 if (sbi->s_partitions)
2047 for (i = 0; i < sbi->s_partitions; i++)
2048 udf_free_partition(&sbi->s_partmaps[i]);
2049 #ifdef CONFIG_UDF_NLS
2050 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2051 unload_nls(sbi->s_nls_map);
2052 #endif
2053 if (!(sb->s_flags & MS_RDONLY))
2054 udf_close_lvid(sb);
2055 brelse(sbi->s_lvid_bh);
2056
2057 kfree(sbi->s_partmaps);
2058 kfree(sbi);
2059 sb->s_fs_info = NULL;
2060
2061 return -EINVAL;
2062 }
2063
2064 static void udf_error(struct super_block *sb, const char *function,
2065 const char *fmt, ...)
2066 {
2067 va_list args;
2068
2069 if (!(sb->s_flags & MS_RDONLY)) {
2070 /* mark sb error */
2071 sb->s_dirt = 1;
2072 }
2073 va_start(args, fmt);
2074 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2075 va_end(args);
2076 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
2077 sb->s_id, function, error_buf);
2078 }
2079
2080 void udf_warning(struct super_block *sb, const char *function,
2081 const char *fmt, ...)
2082 {
2083 va_list args;
2084
2085 va_start(args, fmt);
2086 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2087 va_end(args);
2088 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
2089 sb->s_id, function, error_buf);
2090 }
2091
2092 static void udf_put_super(struct super_block *sb)
2093 {
2094 int i;
2095 struct udf_sb_info *sbi;
2096
2097 sbi = UDF_SB(sb);
2098
2099 lock_kernel();
2100
2101 if (sbi->s_vat_inode)
2102 iput(sbi->s_vat_inode);
2103 if (sbi->s_partitions)
2104 for (i = 0; i < sbi->s_partitions; i++)
2105 udf_free_partition(&sbi->s_partmaps[i]);
2106 #ifdef CONFIG_UDF_NLS
2107 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2108 unload_nls(sbi->s_nls_map);
2109 #endif
2110 if (!(sb->s_flags & MS_RDONLY))
2111 udf_close_lvid(sb);
2112 brelse(sbi->s_lvid_bh);
2113 kfree(sbi->s_partmaps);
2114 kfree(sb->s_fs_info);
2115 sb->s_fs_info = NULL;
2116
2117 unlock_kernel();
2118 }
2119
2120 static int udf_sync_fs(struct super_block *sb, int wait)
2121 {
2122 struct udf_sb_info *sbi = UDF_SB(sb);
2123
2124 mutex_lock(&sbi->s_alloc_mutex);
2125 if (sbi->s_lvid_dirty) {
2126 /*
2127 * Blockdevice will be synced later so we don't have to submit
2128 * the buffer for IO
2129 */
2130 mark_buffer_dirty(sbi->s_lvid_bh);
2131 sb->s_dirt = 0;
2132 sbi->s_lvid_dirty = 0;
2133 }
2134 mutex_unlock(&sbi->s_alloc_mutex);
2135
2136 return 0;
2137 }
2138
2139 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2140 {
2141 struct super_block *sb = dentry->d_sb;
2142 struct udf_sb_info *sbi = UDF_SB(sb);
2143 struct logicalVolIntegrityDescImpUse *lvidiu;
2144 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2145
2146 if (sbi->s_lvid_bh != NULL)
2147 lvidiu = udf_sb_lvidiu(sbi);
2148 else
2149 lvidiu = NULL;
2150
2151 buf->f_type = UDF_SUPER_MAGIC;
2152 buf->f_bsize = sb->s_blocksize;
2153 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2154 buf->f_bfree = udf_count_free(sb);
2155 buf->f_bavail = buf->f_bfree;
2156 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2157 le32_to_cpu(lvidiu->numDirs)) : 0)
2158 + buf->f_bfree;
2159 buf->f_ffree = buf->f_bfree;
2160 buf->f_namelen = UDF_NAME_LEN - 2;
2161 buf->f_fsid.val[0] = (u32)id;
2162 buf->f_fsid.val[1] = (u32)(id >> 32);
2163
2164 return 0;
2165 }
2166
2167 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2168 struct udf_bitmap *bitmap)
2169 {
2170 struct buffer_head *bh = NULL;
2171 unsigned int accum = 0;
2172 int index;
2173 int block = 0, newblock;
2174 struct kernel_lb_addr loc;
2175 uint32_t bytes;
2176 uint8_t *ptr;
2177 uint16_t ident;
2178 struct spaceBitmapDesc *bm;
2179
2180 lock_kernel();
2181
2182 loc.logicalBlockNum = bitmap->s_extPosition;
2183 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2184 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2185
2186 if (!bh) {
2187 printk(KERN_ERR "udf: udf_count_free failed\n");
2188 goto out;
2189 } else if (ident != TAG_IDENT_SBD) {
2190 brelse(bh);
2191 printk(KERN_ERR "udf: udf_count_free failed\n");
2192 goto out;
2193 }
2194
2195 bm = (struct spaceBitmapDesc *)bh->b_data;
2196 bytes = le32_to_cpu(bm->numOfBytes);
2197 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2198 ptr = (uint8_t *)bh->b_data;
2199
2200 while (bytes > 0) {
2201 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2202 accum += bitmap_weight((const unsigned long *)(ptr + index),
2203 cur_bytes * 8);
2204 bytes -= cur_bytes;
2205 if (bytes) {
2206 brelse(bh);
2207 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2208 bh = udf_tread(sb, newblock);
2209 if (!bh) {
2210 udf_debug("read failed\n");
2211 goto out;
2212 }
2213 index = 0;
2214 ptr = (uint8_t *)bh->b_data;
2215 }
2216 }
2217 brelse(bh);
2218
2219 out:
2220 unlock_kernel();
2221
2222 return accum;
2223 }
2224
2225 static unsigned int udf_count_free_table(struct super_block *sb,
2226 struct inode *table)
2227 {
2228 unsigned int accum = 0;
2229 uint32_t elen;
2230 struct kernel_lb_addr eloc;
2231 int8_t etype;
2232 struct extent_position epos;
2233
2234 lock_kernel();
2235
2236 epos.block = UDF_I(table)->i_location;
2237 epos.offset = sizeof(struct unallocSpaceEntry);
2238 epos.bh = NULL;
2239
2240 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2241 accum += (elen >> table->i_sb->s_blocksize_bits);
2242
2243 brelse(epos.bh);
2244
2245 unlock_kernel();
2246
2247 return accum;
2248 }
2249
2250 static unsigned int udf_count_free(struct super_block *sb)
2251 {
2252 unsigned int accum = 0;
2253 struct udf_sb_info *sbi;
2254 struct udf_part_map *map;
2255
2256 sbi = UDF_SB(sb);
2257 if (sbi->s_lvid_bh) {
2258 struct logicalVolIntegrityDesc *lvid =
2259 (struct logicalVolIntegrityDesc *)
2260 sbi->s_lvid_bh->b_data;
2261 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2262 accum = le32_to_cpu(
2263 lvid->freeSpaceTable[sbi->s_partition]);
2264 if (accum == 0xFFFFFFFF)
2265 accum = 0;
2266 }
2267 }
2268
2269 if (accum)
2270 return accum;
2271
2272 map = &sbi->s_partmaps[sbi->s_partition];
2273 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2274 accum += udf_count_free_bitmap(sb,
2275 map->s_uspace.s_bitmap);
2276 }
2277 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2278 accum += udf_count_free_bitmap(sb,
2279 map->s_fspace.s_bitmap);
2280 }
2281 if (accum)
2282 return accum;
2283
2284 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2285 accum += udf_count_free_table(sb,
2286 map->s_uspace.s_table);
2287 }
2288 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2289 accum += udf_count_free_table(sb,
2290 map->s_fspace.s_table);
2291 }
2292
2293 return accum;
2294 }
Linux with added FPC-III support