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udf: fix novrs mount option
[linux-2.6/mini2440.git] / fs / udf / super.c
blob36a467ca1622d5061bb044918598666553b69870
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 void udf_write_super(struct super_block *);
85 static int udf_remount_fs(struct super_block *, int *, char *);
86 static int udf_check_valid(struct super_block *, int, int);
87 static int udf_vrs(struct super_block *sb, int silent);
88 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
89 static void udf_find_anchor(struct super_block *);
90 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
91 struct kernel_lb_addr *);
92 static void udf_load_fileset(struct super_block *, struct buffer_head *,
93 struct kernel_lb_addr *);
94 static void udf_open_lvid(struct super_block *);
95 static void udf_close_lvid(struct super_block *);
96 static unsigned int udf_count_free(struct super_block *);
97 static int udf_statfs(struct dentry *, struct kstatfs *);
98 static int udf_show_options(struct seq_file *, struct vfsmount *);
99 static void udf_error(struct super_block *sb, const char *function,
100 const char *fmt, ...);
101
102 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
103 {
104 struct logicalVolIntegrityDesc *lvid =
105 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
106 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
107 __u32 offset = number_of_partitions * 2 *
108 sizeof(uint32_t)/sizeof(uint8_t);
109 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
110 }
111
112 /* UDF filesystem type */
113 static int udf_get_sb(struct file_system_type *fs_type,
114 int flags, const char *dev_name, void *data,
115 struct vfsmount *mnt)
116 {
117 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
118 }
119
120 static struct file_system_type udf_fstype = {
121 .owner = THIS_MODULE,
122 .name = "udf",
123 .get_sb = udf_get_sb,
124 .kill_sb = kill_block_super,
125 .fs_flags = FS_REQUIRES_DEV,
126 };
127
128 static struct kmem_cache *udf_inode_cachep;
129
130 static struct inode *udf_alloc_inode(struct super_block *sb)
131 {
132 struct udf_inode_info *ei;
133 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
134 if (!ei)
135 return NULL;
136
137 ei->i_unique = 0;
138 ei->i_lenExtents = 0;
139 ei->i_next_alloc_block = 0;
140 ei->i_next_alloc_goal = 0;
141 ei->i_strat4096 = 0;
142
143 return &ei->vfs_inode;
144 }
145
146 static void udf_destroy_inode(struct inode *inode)
147 {
148 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
149 }
150
151 static void init_once(void *foo)
152 {
153 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
154
155 ei->i_ext.i_data = NULL;
156 inode_init_once(&ei->vfs_inode);
157 }
158
159 static int init_inodecache(void)
160 {
161 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
162 sizeof(struct udf_inode_info),
163 0, (SLAB_RECLAIM_ACCOUNT |
164 SLAB_MEM_SPREAD),
165 init_once);
166 if (!udf_inode_cachep)
167 return -ENOMEM;
168 return 0;
169 }
170
171 static void destroy_inodecache(void)
172 {
173 kmem_cache_destroy(udf_inode_cachep);
174 }
175
176 /* Superblock operations */
177 static const struct super_operations udf_sb_ops = {
178 .alloc_inode = udf_alloc_inode,
179 .destroy_inode = udf_destroy_inode,
180 .write_inode = udf_write_inode,
181 .delete_inode = udf_delete_inode,
182 .clear_inode = udf_clear_inode,
183 .put_super = udf_put_super,
184 .write_super = udf_write_super,
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_error(sb, __func__,
246 "Unable to allocate space for %d partition maps",
247 count);
248 sbi->s_partitions = 0;
249 return -ENOMEM;
250 }
251
252 sbi->s_partitions = count;
253 return 0;
254 }
255
256 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
257 {
258 struct super_block *sb = mnt->mnt_sb;
259 struct udf_sb_info *sbi = UDF_SB(sb);
260
261 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
262 seq_puts(seq, ",nostrict");
263 if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE)
264 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
265 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
266 seq_puts(seq, ",unhide");
267 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
268 seq_puts(seq, ",undelete");
269 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
270 seq_puts(seq, ",noadinicb");
271 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
272 seq_puts(seq, ",shortad");
273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
274 seq_puts(seq, ",uid=forget");
275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
276 seq_puts(seq, ",uid=ignore");
277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
278 seq_puts(seq, ",gid=forget");
279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
280 seq_puts(seq, ",gid=ignore");
281 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
282 seq_printf(seq, ",uid=%u", sbi->s_uid);
283 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
284 seq_printf(seq, ",gid=%u", sbi->s_gid);
285 if (sbi->s_umask != 0)
286 seq_printf(seq, ",umask=%o", sbi->s_umask);
287 if (sbi->s_fmode != UDF_INVALID_MODE)
288 seq_printf(seq, ",mode=%o", sbi->s_fmode);
289 if (sbi->s_dmode != UDF_INVALID_MODE)
290 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
291 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
292 seq_printf(seq, ",session=%u", sbi->s_session);
293 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
294 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
295 /*
296 * s_anchor[2] could be zeroed out in case there is no anchor
297 * in the specified block, but then the "anchor=N" option
298 * originally given by the user wasn't effective, so it's OK
299 * if we don't show it.
300 */
301 if (sbi->s_anchor[2] != 0)
302 seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]);
303 /*
304 * volume, partition, fileset and rootdir seem to be ignored
305 * currently
306 */
307 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
308 seq_puts(seq, ",utf8");
309 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
310 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
311
312 return 0;
313 }
314
315 /*
316 * udf_parse_options
317 *
318 * PURPOSE
319 * Parse mount options.
320 *
321 * DESCRIPTION
322 * The following mount options are supported:
323 *
324 * gid= Set the default group.
325 * umask= Set the default umask.
326 * mode= Set the default file permissions.
327 * dmode= Set the default directory permissions.
328 * uid= Set the default user.
329 * bs= Set the block size.
330 * unhide Show otherwise hidden files.
331 * undelete Show deleted files in lists.
332 * adinicb Embed data in the inode (default)
333 * noadinicb Don't embed data in the inode
334 * shortad Use short ad's
335 * longad Use long ad's (default)
336 * nostrict Unset strict conformance
337 * iocharset= Set the NLS character set
338 *
339 * The remaining are for debugging and disaster recovery:
340 *
341 * novrs Skip volume sequence recognition
342 *
343 * The following expect a offset from 0.
344 *
345 * session= Set the CDROM session (default= last session)
346 * anchor= Override standard anchor location. (default= 256)
347 * volume= Override the VolumeDesc location. (unused)
348 * partition= Override the PartitionDesc location. (unused)
349 * lastblock= Set the last block of the filesystem/
350 *
351 * The following expect a offset from the partition root.
352 *
353 * fileset= Override the fileset block location. (unused)
354 * rootdir= Override the root directory location. (unused)
355 * WARNING: overriding the rootdir to a non-directory may
356 * yield highly unpredictable results.
357 *
358 * PRE-CONDITIONS
359 * options Pointer to mount options string.
360 * uopts Pointer to mount options variable.
361 *
362 * POST-CONDITIONS
363 * <return> 1 Mount options parsed okay.
364 * <return> 0 Error parsing mount options.
365 *
366 * HISTORY
367 * July 1, 1997 - Andrew E. Mileski
368 * Written, tested, and released.
369 */
370
371 enum {
372 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
373 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
374 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
375 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
376 Opt_rootdir, Opt_utf8, Opt_iocharset,
377 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
378 Opt_fmode, Opt_dmode
379 };
380
381 static const match_table_t tokens = {
382 {Opt_novrs, "novrs"},
383 {Opt_nostrict, "nostrict"},
384 {Opt_bs, "bs=%u"},
385 {Opt_unhide, "unhide"},
386 {Opt_undelete, "undelete"},
387 {Opt_noadinicb, "noadinicb"},
388 {Opt_adinicb, "adinicb"},
389 {Opt_shortad, "shortad"},
390 {Opt_longad, "longad"},
391 {Opt_uforget, "uid=forget"},
392 {Opt_uignore, "uid=ignore"},
393 {Opt_gforget, "gid=forget"},
394 {Opt_gignore, "gid=ignore"},
395 {Opt_gid, "gid=%u"},
396 {Opt_uid, "uid=%u"},
397 {Opt_umask, "umask=%o"},
398 {Opt_session, "session=%u"},
399 {Opt_lastblock, "lastblock=%u"},
400 {Opt_anchor, "anchor=%u"},
401 {Opt_volume, "volume=%u"},
402 {Opt_partition, "partition=%u"},
403 {Opt_fileset, "fileset=%u"},
404 {Opt_rootdir, "rootdir=%u"},
405 {Opt_utf8, "utf8"},
406 {Opt_iocharset, "iocharset=%s"},
407 {Opt_fmode, "mode=%o"},
408 {Opt_dmode, "dmode=%o"},
409 {Opt_err, NULL}
410 };
411
412 static int udf_parse_options(char *options, struct udf_options *uopt,
413 bool remount)
414 {
415 char *p;
416 int option;
417
418 uopt->novrs = 0;
419 uopt->blocksize = UDF_DEFAULT_BLOCKSIZE;
420 uopt->partition = 0xFFFF;
421 uopt->session = 0xFFFFFFFF;
422 uopt->lastblock = 0;
423 uopt->anchor = 0;
424 uopt->volume = 0xFFFFFFFF;
425 uopt->rootdir = 0xFFFFFFFF;
426 uopt->fileset = 0xFFFFFFFF;
427 uopt->nls_map = NULL;
428
429 if (!options)
430 return 1;
431
432 while ((p = strsep(&options, ",")) != NULL) {
433 substring_t args[MAX_OPT_ARGS];
434 int token;
435 if (!*p)
436 continue;
437
438 token = match_token(p, tokens, args);
439 switch (token) {
440 case Opt_novrs:
441 uopt->novrs = 1;
442 break;
443 case Opt_bs:
444 if (match_int(&args[0], &option))
445 return 0;
446 uopt->blocksize = option;
447 break;
448 case Opt_unhide:
449 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
450 break;
451 case Opt_undelete:
452 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
453 break;
454 case Opt_noadinicb:
455 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
456 break;
457 case Opt_adinicb:
458 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
459 break;
460 case Opt_shortad:
461 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
462 break;
463 case Opt_longad:
464 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
465 break;
466 case Opt_gid:
467 if (match_int(args, &option))
468 return 0;
469 uopt->gid = option;
470 uopt->flags |= (1 << UDF_FLAG_GID_SET);
471 break;
472 case Opt_uid:
473 if (match_int(args, &option))
474 return 0;
475 uopt->uid = option;
476 uopt->flags |= (1 << UDF_FLAG_UID_SET);
477 break;
478 case Opt_umask:
479 if (match_octal(args, &option))
480 return 0;
481 uopt->umask = option;
482 break;
483 case Opt_nostrict:
484 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
485 break;
486 case Opt_session:
487 if (match_int(args, &option))
488 return 0;
489 uopt->session = option;
490 if (!remount)
491 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
492 break;
493 case Opt_lastblock:
494 if (match_int(args, &option))
495 return 0;
496 uopt->lastblock = option;
497 if (!remount)
498 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
499 break;
500 case Opt_anchor:
501 if (match_int(args, &option))
502 return 0;
503 uopt->anchor = option;
504 break;
505 case Opt_volume:
506 if (match_int(args, &option))
507 return 0;
508 uopt->volume = option;
509 break;
510 case Opt_partition:
511 if (match_int(args, &option))
512 return 0;
513 uopt->partition = option;
514 break;
515 case Opt_fileset:
516 if (match_int(args, &option))
517 return 0;
518 uopt->fileset = option;
519 break;
520 case Opt_rootdir:
521 if (match_int(args, &option))
522 return 0;
523 uopt->rootdir = option;
524 break;
525 case Opt_utf8:
526 uopt->flags |= (1 << UDF_FLAG_UTF8);
527 break;
528 #ifdef CONFIG_UDF_NLS
529 case Opt_iocharset:
530 uopt->nls_map = load_nls(args[0].from);
531 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
532 break;
533 #endif
534 case Opt_uignore:
535 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
536 break;
537 case Opt_uforget:
538 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
539 break;
540 case Opt_gignore:
541 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
542 break;
543 case Opt_gforget:
544 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
545 break;
546 case Opt_fmode:
547 if (match_octal(args, &option))
548 return 0;
549 uopt->fmode = option & 0777;
550 break;
551 case Opt_dmode:
552 if (match_octal(args, &option))
553 return 0;
554 uopt->dmode = option & 0777;
555 break;
556 default:
557 printk(KERN_ERR "udf: bad mount option \"%s\" "
558 "or missing value\n", p);
559 return 0;
560 }
561 }
562 return 1;
563 }
564
565 static void udf_write_super(struct super_block *sb)
566 {
567 lock_kernel();
568
569 if (!(sb->s_flags & MS_RDONLY))
570 udf_open_lvid(sb);
571 sb->s_dirt = 0;
572
573 unlock_kernel();
574 }
575
576 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
577 {
578 struct udf_options uopt;
579 struct udf_sb_info *sbi = UDF_SB(sb);
580
581 uopt.flags = sbi->s_flags;
582 uopt.uid = sbi->s_uid;
583 uopt.gid = sbi->s_gid;
584 uopt.umask = sbi->s_umask;
585 uopt.fmode = sbi->s_fmode;
586 uopt.dmode = sbi->s_dmode;
587
588 if (!udf_parse_options(options, &uopt, true))
589 return -EINVAL;
590
591 sbi->s_flags = uopt.flags;
592 sbi->s_uid = uopt.uid;
593 sbi->s_gid = uopt.gid;
594 sbi->s_umask = uopt.umask;
595 sbi->s_fmode = uopt.fmode;
596 sbi->s_dmode = uopt.dmode;
597
598 if (sbi->s_lvid_bh) {
599 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
600 if (write_rev > UDF_MAX_WRITE_VERSION)
601 *flags |= MS_RDONLY;
602 }
603
604 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
605 return 0;
606 if (*flags & MS_RDONLY)
607 udf_close_lvid(sb);
608 else
609 udf_open_lvid(sb);
610
611 return 0;
612 }
613
614 static int udf_vrs(struct super_block *sb, int silent)
615 {
616 struct volStructDesc *vsd = NULL;
617 loff_t sector = 32768;
618 int sectorsize;
619 struct buffer_head *bh = NULL;
620 int iso9660 = 0;
621 int nsr02 = 0;
622 int nsr03 = 0;
623 struct udf_sb_info *sbi;
624
625 /* Block size must be a multiple of 512 */
626 if (sb->s_blocksize & 511)
627 return 0;
628 sbi = UDF_SB(sb);
629
630 if (sb->s_blocksize < sizeof(struct volStructDesc))
631 sectorsize = sizeof(struct volStructDesc);
632 else
633 sectorsize = sb->s_blocksize;
634
635 sector += (sbi->s_session << sb->s_blocksize_bits);
636
637 udf_debug("Starting at sector %u (%ld byte sectors)\n",
638 (unsigned int)(sector >> sb->s_blocksize_bits),
639 sb->s_blocksize);
640 /* Process the sequence (if applicable) */
641 for (; !nsr02 && !nsr03; sector += sectorsize) {
642 /* Read a block */
643 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
644 if (!bh)
645 break;
646
647 /* Look for ISO descriptors */
648 vsd = (struct volStructDesc *)(bh->b_data +
649 (sector & (sb->s_blocksize - 1)));
650
651 if (vsd->stdIdent[0] == 0) {
652 brelse(bh);
653 break;
654 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
655 VSD_STD_ID_LEN)) {
656 iso9660 = sector;
657 switch (vsd->structType) {
658 case 0:
659 udf_debug("ISO9660 Boot Record found\n");
660 break;
661 case 1:
662 udf_debug("ISO9660 Primary Volume Descriptor "
663 "found\n");
664 break;
665 case 2:
666 udf_debug("ISO9660 Supplementary Volume "
667 "Descriptor found\n");
668 break;
669 case 3:
670 udf_debug("ISO9660 Volume Partition Descriptor "
671 "found\n");
672 break;
673 case 255:
674 udf_debug("ISO9660 Volume Descriptor Set "
675 "Terminator found\n");
676 break;
677 default:
678 udf_debug("ISO9660 VRS (%u) found\n",
679 vsd->structType);
680 break;
681 }
682 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
683 VSD_STD_ID_LEN))
684 ; /* nothing */
685 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
686 VSD_STD_ID_LEN)) {
687 brelse(bh);
688 break;
689 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
690 VSD_STD_ID_LEN))
691 nsr02 = sector;
692 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
693 VSD_STD_ID_LEN))
694 nsr03 = sector;
695 brelse(bh);
696 }
697
698 if (nsr03)
699 return nsr03;
700 else if (nsr02)
701 return nsr02;
702 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
703 return -1;
704 else
705 return 0;
706 }
707
708 /*
709 * Check whether there is an anchor block in the given block
710 */
711 static int udf_check_anchor_block(struct super_block *sb, sector_t block)
712 {
713 struct buffer_head *bh;
714 uint16_t ident;
715
716 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
717 udf_fixed_to_variable(block) >=
718 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
719 return 0;
720
721 bh = udf_read_tagged(sb, block, block, &ident);
722 if (!bh)
723 return 0;
724 brelse(bh);
725
726 return ident == TAG_IDENT_AVDP;
727 }
728
729 /* Search for an anchor volume descriptor pointer */
730 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock)
731 {
732 sector_t last[6];
733 int i;
734 struct udf_sb_info *sbi = UDF_SB(sb);
735 int last_count = 0;
736
737 last[last_count++] = lastblock;
738 if (lastblock >= 1)
739 last[last_count++] = lastblock - 1;
740 last[last_count++] = lastblock + 1;
741 if (lastblock >= 2)
742 last[last_count++] = lastblock - 2;
743 if (lastblock >= 150)
744 last[last_count++] = lastblock - 150;
745 if (lastblock >= 152)
746 last[last_count++] = lastblock - 152;
747
748 /* according to spec, anchor is in either:
749 * block 256
750 * lastblock-256
751 * lastblock
752 * however, if the disc isn't closed, it could be 512 */
753
754 for (i = 0; i < last_count; i++) {
755 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
756 sb->s_blocksize_bits)
757 continue;
758
759 if (udf_check_anchor_block(sb, last[i])) {
760 sbi->s_anchor[0] = last[i];
761 sbi->s_anchor[1] = last[i] - 256;
762 return last[i];
763 }
764
765 if (last[i] < 256)
766 continue;
767
768 if (udf_check_anchor_block(sb, last[i] - 256)) {
769 sbi->s_anchor[1] = last[i] - 256;
770 return last[i];
771 }
772 }
773
774 if (udf_check_anchor_block(sb, sbi->s_session + 256)) {
775 sbi->s_anchor[0] = sbi->s_session + 256;
776 return last[0];
777 }
778 if (udf_check_anchor_block(sb, sbi->s_session + 512)) {
779 sbi->s_anchor[0] = sbi->s_session + 512;
780 return last[0];
781 }
782 return 0;
783 }
784
785 /*
786 * Find an anchor volume descriptor. The function expects sbi->s_lastblock to
787 * be the last block on the media.
788 *
789 * Return 1 if not found, 0 if ok
790 *
791 */
792 static void udf_find_anchor(struct super_block *sb)
793 {
794 sector_t lastblock;
795 struct buffer_head *bh = NULL;
796 uint16_t ident;
797 int i;
798 struct udf_sb_info *sbi = UDF_SB(sb);
799
800 lastblock = udf_scan_anchors(sb, sbi->s_last_block);
801 if (lastblock)
802 goto check_anchor;
803
804 /* No anchor found? Try VARCONV conversion of block numbers */
805 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
806 /* Firstly, we try to not convert number of the last block */
807 lastblock = udf_scan_anchors(sb,
808 udf_variable_to_fixed(sbi->s_last_block));
809 if (lastblock)
810 goto check_anchor;
811
812 /* Secondly, we try with converted number of the last block */
813 lastblock = udf_scan_anchors(sb, sbi->s_last_block);
814 if (!lastblock) {
815 /* VARCONV didn't help. Clear it. */
816 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
817 }
818
819 check_anchor:
820 /*
821 * Check located anchors and the anchor block supplied via
822 * mount options
823 */
824 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
825 if (!sbi->s_anchor[i])
826 continue;
827 bh = udf_read_tagged(sb, sbi->s_anchor[i],
828 sbi->s_anchor[i], &ident);
829 if (!bh)
830 sbi->s_anchor[i] = 0;
831 else {
832 brelse(bh);
833 if (ident != TAG_IDENT_AVDP)
834 sbi->s_anchor[i] = 0;
835 }
836 }
837
838 sbi->s_last_block = lastblock;
839 }
840
841 static int udf_find_fileset(struct super_block *sb,
842 struct kernel_lb_addr *fileset,
843 struct kernel_lb_addr *root)
844 {
845 struct buffer_head *bh = NULL;
846 long lastblock;
847 uint16_t ident;
848 struct udf_sb_info *sbi;
849
850 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
851 fileset->partitionReferenceNum != 0xFFFF) {
852 bh = udf_read_ptagged(sb, fileset, 0, &ident);
853
854 if (!bh) {
855 return 1;
856 } else if (ident != TAG_IDENT_FSD) {
857 brelse(bh);
858 return 1;
859 }
860
861 }
862
863 sbi = UDF_SB(sb);
864 if (!bh) {
865 /* Search backwards through the partitions */
866 struct kernel_lb_addr newfileset;
867
868 /* --> cvg: FIXME - is it reasonable? */
869 return 1;
870
871 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
872 (newfileset.partitionReferenceNum != 0xFFFF &&
873 fileset->logicalBlockNum == 0xFFFFFFFF &&
874 fileset->partitionReferenceNum == 0xFFFF);
875 newfileset.partitionReferenceNum--) {
876 lastblock = sbi->s_partmaps
877 [newfileset.partitionReferenceNum]
878 .s_partition_len;
879 newfileset.logicalBlockNum = 0;
880
881 do {
882 bh = udf_read_ptagged(sb, &newfileset, 0,
883 &ident);
884 if (!bh) {
885 newfileset.logicalBlockNum++;
886 continue;
887 }
888
889 switch (ident) {
890 case TAG_IDENT_SBD:
891 {
892 struct spaceBitmapDesc *sp;
893 sp = (struct spaceBitmapDesc *)
894 bh->b_data;
895 newfileset.logicalBlockNum += 1 +
896 ((le32_to_cpu(sp->numOfBytes) +
897 sizeof(struct spaceBitmapDesc)
898 - 1) >> sb->s_blocksize_bits);
899 brelse(bh);
900 break;
901 }
902 case TAG_IDENT_FSD:
903 *fileset = newfileset;
904 break;
905 default:
906 newfileset.logicalBlockNum++;
907 brelse(bh);
908 bh = NULL;
909 break;
910 }
911 } while (newfileset.logicalBlockNum < lastblock &&
912 fileset->logicalBlockNum == 0xFFFFFFFF &&
913 fileset->partitionReferenceNum == 0xFFFF);
914 }
915 }
916
917 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
918 fileset->partitionReferenceNum != 0xFFFF) && bh) {
919 udf_debug("Fileset at block=%d, partition=%d\n",
920 fileset->logicalBlockNum,
921 fileset->partitionReferenceNum);
922
923 sbi->s_partition = fileset->partitionReferenceNum;
924 udf_load_fileset(sb, bh, root);
925 brelse(bh);
926 return 0;
927 }
928 return 1;
929 }
930
931 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
932 {
933 struct primaryVolDesc *pvoldesc;
934 struct ustr *instr, *outstr;
935 struct buffer_head *bh;
936 uint16_t ident;
937 int ret = 1;
938
939 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
940 if (!instr)
941 return 1;
942
943 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
944 if (!outstr)
945 goto out1;
946
947 bh = udf_read_tagged(sb, block, block, &ident);
948 if (!bh)
949 goto out2;
950
951 BUG_ON(ident != TAG_IDENT_PVD);
952
953 pvoldesc = (struct primaryVolDesc *)bh->b_data;
954
955 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
956 pvoldesc->recordingDateAndTime)) {
957 #ifdef UDFFS_DEBUG
958 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
959 udf_debug("recording time %04u/%02u/%02u"
960 " %02u:%02u (%x)\n",
961 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
962 ts->minute, le16_to_cpu(ts->typeAndTimezone));
963 #endif
964 }
965
966 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
967 if (udf_CS0toUTF8(outstr, instr)) {
968 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
969 outstr->u_len > 31 ? 31 : outstr->u_len);
970 udf_debug("volIdent[] = '%s'\n",
971 UDF_SB(sb)->s_volume_ident);
972 }
973
974 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
975 if (udf_CS0toUTF8(outstr, instr))
976 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
977
978 brelse(bh);
979 ret = 0;
980 out2:
981 kfree(outstr);
982 out1:
983 kfree(instr);
984 return ret;
985 }
986
987 static int udf_load_metadata_files(struct super_block *sb, int partition)
988 {
989 struct udf_sb_info *sbi = UDF_SB(sb);
990 struct udf_part_map *map;
991 struct udf_meta_data *mdata;
992 struct kernel_lb_addr addr;
993 int fe_error = 0;
994
995 map = &sbi->s_partmaps[partition];
996 mdata = &map->s_type_specific.s_metadata;
997
998 /* metadata address */
999 addr.logicalBlockNum = mdata->s_meta_file_loc;
1000 addr.partitionReferenceNum = map->s_partition_num;
1001
1002 udf_debug("Metadata file location: block = %d part = %d\n",
1003 addr.logicalBlockNum, addr.partitionReferenceNum);
1004
1005 mdata->s_metadata_fe = udf_iget(sb, &addr);
1006
1007 if (mdata->s_metadata_fe == NULL) {
1008 udf_warning(sb, __func__, "metadata inode efe not found, "
1009 "will try mirror inode.");
1010 fe_error = 1;
1011 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
1012 ICBTAG_FLAG_AD_SHORT) {
1013 udf_warning(sb, __func__, "metadata inode efe does not have "
1014 "short allocation descriptors!");
1015 fe_error = 1;
1016 iput(mdata->s_metadata_fe);
1017 mdata->s_metadata_fe = NULL;
1018 }
1019
1020 /* mirror file entry */
1021 addr.logicalBlockNum = mdata->s_mirror_file_loc;
1022 addr.partitionReferenceNum = map->s_partition_num;
1023
1024 udf_debug("Mirror metadata file location: block = %d part = %d\n",
1025 addr.logicalBlockNum, addr.partitionReferenceNum);
1026
1027 mdata->s_mirror_fe = udf_iget(sb, &addr);
1028
1029 if (mdata->s_mirror_fe == NULL) {
1030 if (fe_error) {
1031 udf_error(sb, __func__, "mirror inode efe not found "
1032 "and metadata inode is missing too, exiting...");
1033 goto error_exit;
1034 } else
1035 udf_warning(sb, __func__, "mirror inode efe not found,"
1036 " but metadata inode is OK");
1037 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
1038 ICBTAG_FLAG_AD_SHORT) {
1039 udf_warning(sb, __func__, "mirror inode efe does not have "
1040 "short allocation descriptors!");
1041 iput(mdata->s_mirror_fe);
1042 mdata->s_mirror_fe = NULL;
1043 if (fe_error)
1044 goto error_exit;
1045 }
1046
1047 /*
1048 * bitmap file entry
1049 * Note:
1050 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1051 */
1052 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1053 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1054 addr.partitionReferenceNum = map->s_partition_num;
1055
1056 udf_debug("Bitmap file location: block = %d part = %d\n",
1057 addr.logicalBlockNum, addr.partitionReferenceNum);
1058
1059 mdata->s_bitmap_fe = udf_iget(sb, &addr);
1060
1061 if (mdata->s_bitmap_fe == NULL) {
1062 if (sb->s_flags & MS_RDONLY)
1063 udf_warning(sb, __func__, "bitmap inode efe "
1064 "not found but it's ok since the disc"
1065 " is mounted read-only");
1066 else {
1067 udf_error(sb, __func__, "bitmap inode efe not "
1068 "found and attempted read-write mount");
1069 goto error_exit;
1070 }
1071 }
1072 }
1073
1074 udf_debug("udf_load_metadata_files Ok\n");
1075
1076 return 0;
1077
1078 error_exit:
1079 return 1;
1080 }
1081
1082 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1083 struct kernel_lb_addr *root)
1084 {
1085 struct fileSetDesc *fset;
1086
1087 fset = (struct fileSetDesc *)bh->b_data;
1088
1089 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1090
1091 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1092
1093 udf_debug("Rootdir at block=%d, partition=%d\n",
1094 root->logicalBlockNum, root->partitionReferenceNum);
1095 }
1096
1097 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1098 {
1099 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1100 return DIV_ROUND_UP(map->s_partition_len +
1101 (sizeof(struct spaceBitmapDesc) << 3),
1102 sb->s_blocksize * 8);
1103 }
1104
1105 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1106 {
1107 struct udf_bitmap *bitmap;
1108 int nr_groups;
1109 int size;
1110
1111 nr_groups = udf_compute_nr_groups(sb, index);
1112 size = sizeof(struct udf_bitmap) +
1113 (sizeof(struct buffer_head *) * nr_groups);
1114
1115 if (size <= PAGE_SIZE)
1116 bitmap = kmalloc(size, GFP_KERNEL);
1117 else
1118 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
1119
1120 if (bitmap == NULL) {
1121 udf_error(sb, __func__,
1122 "Unable to allocate space for bitmap "
1123 "and %d buffer_head pointers", nr_groups);
1124 return NULL;
1125 }
1126
1127 memset(bitmap, 0x00, size);
1128 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1129 bitmap->s_nr_groups = nr_groups;
1130 return bitmap;
1131 }
1132
1133 static int udf_fill_partdesc_info(struct super_block *sb,
1134 struct partitionDesc *p, int p_index)
1135 {
1136 struct udf_part_map *map;
1137 struct udf_sb_info *sbi = UDF_SB(sb);
1138 struct partitionHeaderDesc *phd;
1139
1140 map = &sbi->s_partmaps[p_index];
1141
1142 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1143 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1144
1145 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1146 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1147 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1148 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1149 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1150 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1151 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1152 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1153
1154 udf_debug("Partition (%d type %x) starts at physical %d, "
1155 "block length %d\n", p_index,
1156 map->s_partition_type, map->s_partition_root,
1157 map->s_partition_len);
1158
1159 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1160 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1161 return 0;
1162
1163 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1164 if (phd->unallocSpaceTable.extLength) {
1165 struct kernel_lb_addr loc = {
1166 .logicalBlockNum = le32_to_cpu(
1167 phd->unallocSpaceTable.extPosition),
1168 .partitionReferenceNum = p_index,
1169 };
1170
1171 map->s_uspace.s_table = udf_iget(sb, &loc);
1172 if (!map->s_uspace.s_table) {
1173 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1174 p_index);
1175 return 1;
1176 }
1177 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1178 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1179 p_index, map->s_uspace.s_table->i_ino);
1180 }
1181
1182 if (phd->unallocSpaceBitmap.extLength) {
1183 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1184 if (!bitmap)
1185 return 1;
1186 map->s_uspace.s_bitmap = bitmap;
1187 bitmap->s_extLength = le32_to_cpu(
1188 phd->unallocSpaceBitmap.extLength);
1189 bitmap->s_extPosition = le32_to_cpu(
1190 phd->unallocSpaceBitmap.extPosition);
1191 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1192 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1193 bitmap->s_extPosition);
1194 }
1195
1196 if (phd->partitionIntegrityTable.extLength)
1197 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1198
1199 if (phd->freedSpaceTable.extLength) {
1200 struct kernel_lb_addr loc = {
1201 .logicalBlockNum = le32_to_cpu(
1202 phd->freedSpaceTable.extPosition),
1203 .partitionReferenceNum = p_index,
1204 };
1205
1206 map->s_fspace.s_table = udf_iget(sb, &loc);
1207 if (!map->s_fspace.s_table) {
1208 udf_debug("cannot load freedSpaceTable (part %d)\n",
1209 p_index);
1210 return 1;
1211 }
1212
1213 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1214 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1215 p_index, map->s_fspace.s_table->i_ino);
1216 }
1217
1218 if (phd->freedSpaceBitmap.extLength) {
1219 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1220 if (!bitmap)
1221 return 1;
1222 map->s_fspace.s_bitmap = bitmap;
1223 bitmap->s_extLength = le32_to_cpu(
1224 phd->freedSpaceBitmap.extLength);
1225 bitmap->s_extPosition = le32_to_cpu(
1226 phd->freedSpaceBitmap.extPosition);
1227 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1228 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1229 bitmap->s_extPosition);
1230 }
1231 return 0;
1232 }
1233
1234 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1235 {
1236 struct udf_sb_info *sbi = UDF_SB(sb);
1237 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1238 struct kernel_lb_addr ino;
1239 struct buffer_head *bh = NULL;
1240 struct udf_inode_info *vati;
1241 uint32_t pos;
1242 struct virtualAllocationTable20 *vat20;
1243
1244 /* VAT file entry is in the last recorded block */
1245 ino.partitionReferenceNum = type1_index;
1246 ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root;
1247 sbi->s_vat_inode = udf_iget(sb, &ino);
1248 if (!sbi->s_vat_inode)
1249 return 1;
1250
1251 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1252 map->s_type_specific.s_virtual.s_start_offset = 0;
1253 map->s_type_specific.s_virtual.s_num_entries =
1254 (sbi->s_vat_inode->i_size - 36) >> 2;
1255 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1256 vati = UDF_I(sbi->s_vat_inode);
1257 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1258 pos = udf_block_map(sbi->s_vat_inode, 0);
1259 bh = sb_bread(sb, pos);
1260 if (!bh)
1261 return 1;
1262 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1263 } else {
1264 vat20 = (struct virtualAllocationTable20 *)
1265 vati->i_ext.i_data;
1266 }
1267
1268 map->s_type_specific.s_virtual.s_start_offset =
1269 le16_to_cpu(vat20->lengthHeader);
1270 map->s_type_specific.s_virtual.s_num_entries =
1271 (sbi->s_vat_inode->i_size -
1272 map->s_type_specific.s_virtual.
1273 s_start_offset) >> 2;
1274 brelse(bh);
1275 }
1276 return 0;
1277 }
1278
1279 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1280 {
1281 struct buffer_head *bh;
1282 struct partitionDesc *p;
1283 struct udf_part_map *map;
1284 struct udf_sb_info *sbi = UDF_SB(sb);
1285 int i, type1_idx;
1286 uint16_t partitionNumber;
1287 uint16_t ident;
1288 int ret = 0;
1289
1290 bh = udf_read_tagged(sb, block, block, &ident);
1291 if (!bh)
1292 return 1;
1293 if (ident != TAG_IDENT_PD)
1294 goto out_bh;
1295
1296 p = (struct partitionDesc *)bh->b_data;
1297 partitionNumber = le16_to_cpu(p->partitionNumber);
1298
1299 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1300 for (i = 0; i < sbi->s_partitions; i++) {
1301 map = &sbi->s_partmaps[i];
1302 udf_debug("Searching map: (%d == %d)\n",
1303 map->s_partition_num, partitionNumber);
1304 if (map->s_partition_num == partitionNumber &&
1305 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1306 map->s_partition_type == UDF_SPARABLE_MAP15))
1307 break;
1308 }
1309
1310 if (i >= sbi->s_partitions) {
1311 udf_debug("Partition (%d) not found in partition map\n",
1312 partitionNumber);
1313 goto out_bh;
1314 }
1315
1316 ret = udf_fill_partdesc_info(sb, p, i);
1317
1318 /*
1319 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1320 * PHYSICAL partitions are already set up
1321 */
1322 type1_idx = i;
1323 for (i = 0; i < sbi->s_partitions; i++) {
1324 map = &sbi->s_partmaps[i];
1325
1326 if (map->s_partition_num == partitionNumber &&
1327 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1328 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1329 map->s_partition_type == UDF_METADATA_MAP25))
1330 break;
1331 }
1332
1333 if (i >= sbi->s_partitions)
1334 goto out_bh;
1335
1336 ret = udf_fill_partdesc_info(sb, p, i);
1337 if (ret)
1338 goto out_bh;
1339
1340 if (map->s_partition_type == UDF_METADATA_MAP25) {
1341 ret = udf_load_metadata_files(sb, i);
1342 if (ret) {
1343 printk(KERN_ERR "UDF-fs: error loading MetaData "
1344 "partition map %d\n", i);
1345 goto out_bh;
1346 }
1347 } else {
1348 ret = udf_load_vat(sb, i, type1_idx);
1349 if (ret)
1350 goto out_bh;
1351 /*
1352 * Mark filesystem read-only if we have a partition with
1353 * virtual map since we don't handle writing to it (we
1354 * overwrite blocks instead of relocating them).
1355 */
1356 sb->s_flags |= MS_RDONLY;
1357 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1358 "because writing to pseudooverwrite partition is "
1359 "not implemented.\n");
1360 }
1361 out_bh:
1362 /* In case loading failed, we handle cleanup in udf_fill_super */
1363 brelse(bh);
1364 return ret;
1365 }
1366
1367 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1368 struct kernel_lb_addr *fileset)
1369 {
1370 struct logicalVolDesc *lvd;
1371 int i, j, offset;
1372 uint8_t type;
1373 struct udf_sb_info *sbi = UDF_SB(sb);
1374 struct genericPartitionMap *gpm;
1375 uint16_t ident;
1376 struct buffer_head *bh;
1377 int ret = 0;
1378
1379 bh = udf_read_tagged(sb, block, block, &ident);
1380 if (!bh)
1381 return 1;
1382 BUG_ON(ident != TAG_IDENT_LVD);
1383 lvd = (struct logicalVolDesc *)bh->b_data;
1384
1385 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1386 if (i != 0) {
1387 ret = i;
1388 goto out_bh;
1389 }
1390
1391 for (i = 0, offset = 0;
1392 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1393 i++, offset += gpm->partitionMapLength) {
1394 struct udf_part_map *map = &sbi->s_partmaps[i];
1395 gpm = (struct genericPartitionMap *)
1396 &(lvd->partitionMaps[offset]);
1397 type = gpm->partitionMapType;
1398 if (type == 1) {
1399 struct genericPartitionMap1 *gpm1 =
1400 (struct genericPartitionMap1 *)gpm;
1401 map->s_partition_type = UDF_TYPE1_MAP15;
1402 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1403 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1404 map->s_partition_func = NULL;
1405 } else if (type == 2) {
1406 struct udfPartitionMap2 *upm2 =
1407 (struct udfPartitionMap2 *)gpm;
1408 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1409 strlen(UDF_ID_VIRTUAL))) {
1410 u16 suf =
1411 le16_to_cpu(((__le16 *)upm2->partIdent.
1412 identSuffix)[0]);
1413 if (suf < 0x0200) {
1414 map->s_partition_type =
1415 UDF_VIRTUAL_MAP15;
1416 map->s_partition_func =
1417 udf_get_pblock_virt15;
1418 } else {
1419 map->s_partition_type =
1420 UDF_VIRTUAL_MAP20;
1421 map->s_partition_func =
1422 udf_get_pblock_virt20;
1423 }
1424 } else if (!strncmp(upm2->partIdent.ident,
1425 UDF_ID_SPARABLE,
1426 strlen(UDF_ID_SPARABLE))) {
1427 uint32_t loc;
1428 struct sparingTable *st;
1429 struct sparablePartitionMap *spm =
1430 (struct sparablePartitionMap *)gpm;
1431
1432 map->s_partition_type = UDF_SPARABLE_MAP15;
1433 map->s_type_specific.s_sparing.s_packet_len =
1434 le16_to_cpu(spm->packetLength);
1435 for (j = 0; j < spm->numSparingTables; j++) {
1436 struct buffer_head *bh2;
1437
1438 loc = le32_to_cpu(
1439 spm->locSparingTable[j]);
1440 bh2 = udf_read_tagged(sb, loc, loc,
1441 &ident);
1442 map->s_type_specific.s_sparing.
1443 s_spar_map[j] = bh2;
1444
1445 if (bh2 == NULL)
1446 continue;
1447
1448 st = (struct sparingTable *)bh2->b_data;
1449 if (ident != 0 || strncmp(
1450 st->sparingIdent.ident,
1451 UDF_ID_SPARING,
1452 strlen(UDF_ID_SPARING))) {
1453 brelse(bh2);
1454 map->s_type_specific.s_sparing.
1455 s_spar_map[j] = NULL;
1456 }
1457 }
1458 map->s_partition_func = udf_get_pblock_spar15;
1459 } else if (!strncmp(upm2->partIdent.ident,
1460 UDF_ID_METADATA,
1461 strlen(UDF_ID_METADATA))) {
1462 struct udf_meta_data *mdata =
1463 &map->s_type_specific.s_metadata;
1464 struct metadataPartitionMap *mdm =
1465 (struct metadataPartitionMap *)
1466 &(lvd->partitionMaps[offset]);
1467 udf_debug("Parsing Logical vol part %d "
1468 "type %d id=%s\n", i, type,
1469 UDF_ID_METADATA);
1470
1471 map->s_partition_type = UDF_METADATA_MAP25;
1472 map->s_partition_func = udf_get_pblock_meta25;
1473
1474 mdata->s_meta_file_loc =
1475 le32_to_cpu(mdm->metadataFileLoc);
1476 mdata->s_mirror_file_loc =
1477 le32_to_cpu(mdm->metadataMirrorFileLoc);
1478 mdata->s_bitmap_file_loc =
1479 le32_to_cpu(mdm->metadataBitmapFileLoc);
1480 mdata->s_alloc_unit_size =
1481 le32_to_cpu(mdm->allocUnitSize);
1482 mdata->s_align_unit_size =
1483 le16_to_cpu(mdm->alignUnitSize);
1484 mdata->s_dup_md_flag =
1485 mdm->flags & 0x01;
1486
1487 udf_debug("Metadata Ident suffix=0x%x\n",
1488 (le16_to_cpu(
1489 ((__le16 *)
1490 mdm->partIdent.identSuffix)[0])));
1491 udf_debug("Metadata part num=%d\n",
1492 le16_to_cpu(mdm->partitionNum));
1493 udf_debug("Metadata part alloc unit size=%d\n",
1494 le32_to_cpu(mdm->allocUnitSize));
1495 udf_debug("Metadata file loc=%d\n",
1496 le32_to_cpu(mdm->metadataFileLoc));
1497 udf_debug("Mirror file loc=%d\n",
1498 le32_to_cpu(mdm->metadataMirrorFileLoc));
1499 udf_debug("Bitmap file loc=%d\n",
1500 le32_to_cpu(mdm->metadataBitmapFileLoc));
1501 udf_debug("Duplicate Flag: %d %d\n",
1502 mdata->s_dup_md_flag, mdm->flags);
1503 } else {
1504 udf_debug("Unknown ident: %s\n",
1505 upm2->partIdent.ident);
1506 continue;
1507 }
1508 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1509 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1510 }
1511 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1512 i, map->s_partition_num, type,
1513 map->s_volumeseqnum);
1514 }
1515
1516 if (fileset) {
1517 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1518
1519 *fileset = lelb_to_cpu(la->extLocation);
1520 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1521 "partition=%d\n", fileset->logicalBlockNum,
1522 fileset->partitionReferenceNum);
1523 }
1524 if (lvd->integritySeqExt.extLength)
1525 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1526
1527 out_bh:
1528 brelse(bh);
1529 return ret;
1530 }
1531
1532 /*
1533 * udf_load_logicalvolint
1534 *
1535 */
1536 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1537 {
1538 struct buffer_head *bh = NULL;
1539 uint16_t ident;
1540 struct udf_sb_info *sbi = UDF_SB(sb);
1541 struct logicalVolIntegrityDesc *lvid;
1542
1543 while (loc.extLength > 0 &&
1544 (bh = udf_read_tagged(sb, loc.extLocation,
1545 loc.extLocation, &ident)) &&
1546 ident == TAG_IDENT_LVID) {
1547 sbi->s_lvid_bh = bh;
1548 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1549
1550 if (lvid->nextIntegrityExt.extLength)
1551 udf_load_logicalvolint(sb,
1552 leea_to_cpu(lvid->nextIntegrityExt));
1553
1554 if (sbi->s_lvid_bh != bh)
1555 brelse(bh);
1556 loc.extLength -= sb->s_blocksize;
1557 loc.extLocation++;
1558 }
1559 if (sbi->s_lvid_bh != bh)
1560 brelse(bh);
1561 }
1562
1563 /*
1564 * udf_process_sequence
1565 *
1566 * PURPOSE
1567 * Process a main/reserve volume descriptor sequence.
1568 *
1569 * PRE-CONDITIONS
1570 * sb Pointer to _locked_ superblock.
1571 * block First block of first extent of the sequence.
1572 * lastblock Lastblock of first extent of the sequence.
1573 *
1574 * HISTORY
1575 * July 1, 1997 - Andrew E. Mileski
1576 * Written, tested, and released.
1577 */
1578 static noinline int udf_process_sequence(struct super_block *sb, long block,
1579 long lastblock, struct kernel_lb_addr *fileset)
1580 {
1581 struct buffer_head *bh = NULL;
1582 struct udf_vds_record vds[VDS_POS_LENGTH];
1583 struct udf_vds_record *curr;
1584 struct generic_desc *gd;
1585 struct volDescPtr *vdp;
1586 int done = 0;
1587 uint32_t vdsn;
1588 uint16_t ident;
1589 long next_s = 0, next_e = 0;
1590
1591 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1592
1593 /*
1594 * Read the main descriptor sequence and find which descriptors
1595 * are in it.
1596 */
1597 for (; (!done && block <= lastblock); block++) {
1598
1599 bh = udf_read_tagged(sb, block, block, &ident);
1600 if (!bh) {
1601 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1602 "sequence is corrupted or we could not read "
1603 "it.\n", (unsigned long long)block);
1604 return 1;
1605 }
1606
1607 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1608 gd = (struct generic_desc *)bh->b_data;
1609 vdsn = le32_to_cpu(gd->volDescSeqNum);
1610 switch (ident) {
1611 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1612 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1613 if (vdsn >= curr->volDescSeqNum) {
1614 curr->volDescSeqNum = vdsn;
1615 curr->block = block;
1616 }
1617 break;
1618 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1619 curr = &vds[VDS_POS_VOL_DESC_PTR];
1620 if (vdsn >= curr->volDescSeqNum) {
1621 curr->volDescSeqNum = vdsn;
1622 curr->block = block;
1623
1624 vdp = (struct volDescPtr *)bh->b_data;
1625 next_s = le32_to_cpu(
1626 vdp->nextVolDescSeqExt.extLocation);
1627 next_e = le32_to_cpu(
1628 vdp->nextVolDescSeqExt.extLength);
1629 next_e = next_e >> sb->s_blocksize_bits;
1630 next_e += next_s;
1631 }
1632 break;
1633 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1634 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1635 if (vdsn >= curr->volDescSeqNum) {
1636 curr->volDescSeqNum = vdsn;
1637 curr->block = block;
1638 }
1639 break;
1640 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1641 curr = &vds[VDS_POS_PARTITION_DESC];
1642 if (!curr->block)
1643 curr->block = block;
1644 break;
1645 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1646 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1647 if (vdsn >= curr->volDescSeqNum) {
1648 curr->volDescSeqNum = vdsn;
1649 curr->block = block;
1650 }
1651 break;
1652 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1653 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1654 if (vdsn >= curr->volDescSeqNum) {
1655 curr->volDescSeqNum = vdsn;
1656 curr->block = block;
1657 }
1658 break;
1659 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1660 vds[VDS_POS_TERMINATING_DESC].block = block;
1661 if (next_e) {
1662 block = next_s;
1663 lastblock = next_e;
1664 next_s = next_e = 0;
1665 } else
1666 done = 1;
1667 break;
1668 }
1669 brelse(bh);
1670 }
1671 /*
1672 * Now read interesting descriptors again and process them
1673 * in a suitable order
1674 */
1675 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1676 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1677 return 1;
1678 }
1679 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1680 return 1;
1681
1682 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1683 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1684 return 1;
1685
1686 if (vds[VDS_POS_PARTITION_DESC].block) {
1687 /*
1688 * We rescan the whole descriptor sequence to find
1689 * partition descriptor blocks and process them.
1690 */
1691 for (block = vds[VDS_POS_PARTITION_DESC].block;
1692 block < vds[VDS_POS_TERMINATING_DESC].block;
1693 block++)
1694 if (udf_load_partdesc(sb, block))
1695 return 1;
1696 }
1697
1698 return 0;
1699 }
1700
1701 /*
1702 * udf_check_valid()
1703 */
1704 static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1705 {
1706 long block;
1707 struct udf_sb_info *sbi = UDF_SB(sb);
1708
1709 if (novrs) {
1710 udf_debug("Validity check skipped because of novrs option\n");
1711 return 0;
1712 }
1713 /* Check that it is NSR02 compliant */
1714 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1715 block = udf_vrs(sb, silent);
1716 if (block == -1)
1717 udf_debug("Failed to read byte 32768. Assuming open "
1718 "disc. Skipping validity check\n");
1719 if (block && !sbi->s_last_block)
1720 sbi->s_last_block = udf_get_last_block(sb);
1721 return !block;
1722 }
1723
1724 static int udf_load_sequence(struct super_block *sb, struct kernel_lb_addr *fileset)
1725 {
1726 struct anchorVolDescPtr *anchor;
1727 uint16_t ident;
1728 struct buffer_head *bh;
1729 long main_s, main_e, reserve_s, reserve_e;
1730 int i;
1731 struct udf_sb_info *sbi;
1732
1733 if (!sb)
1734 return 1;
1735 sbi = UDF_SB(sb);
1736
1737 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
1738 if (!sbi->s_anchor[i])
1739 continue;
1740
1741 bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i],
1742 &ident);
1743 if (!bh)
1744 continue;
1745
1746 anchor = (struct anchorVolDescPtr *)bh->b_data;
1747
1748 /* Locate the main sequence */
1749 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1750 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1751 main_e = main_e >> sb->s_blocksize_bits;
1752 main_e += main_s;
1753
1754 /* Locate the reserve sequence */
1755 reserve_s = le32_to_cpu(
1756 anchor->reserveVolDescSeqExt.extLocation);
1757 reserve_e = le32_to_cpu(
1758 anchor->reserveVolDescSeqExt.extLength);
1759 reserve_e = reserve_e >> sb->s_blocksize_bits;
1760 reserve_e += reserve_s;
1761
1762 brelse(bh);
1763
1764 /* Process the main & reserve sequences */
1765 /* responsible for finding the PartitionDesc(s) */
1766 if (!(udf_process_sequence(sb, main_s, main_e,
1767 fileset) &&
1768 udf_process_sequence(sb, reserve_s, reserve_e,
1769 fileset)))
1770 break;
1771 }
1772
1773 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1774 udf_debug("No Anchor block found\n");
1775 return 1;
1776 }
1777 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1778
1779 return 0;
1780 }
1781
1782 static void udf_open_lvid(struct super_block *sb)
1783 {
1784 struct udf_sb_info *sbi = UDF_SB(sb);
1785 struct buffer_head *bh = sbi->s_lvid_bh;
1786 struct logicalVolIntegrityDesc *lvid;
1787 struct logicalVolIntegrityDescImpUse *lvidiu;
1788 if (!bh)
1789 return;
1790
1791 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1792 lvidiu = udf_sb_lvidiu(sbi);
1793
1794 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1795 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1796 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1797 CURRENT_TIME);
1798 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1799
1800 lvid->descTag.descCRC = cpu_to_le16(
1801 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1802 le16_to_cpu(lvid->descTag.descCRCLength)));
1803
1804 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1805 mark_buffer_dirty(bh);
1806 }
1807
1808 static void udf_close_lvid(struct super_block *sb)
1809 {
1810 struct udf_sb_info *sbi = UDF_SB(sb);
1811 struct buffer_head *bh = sbi->s_lvid_bh;
1812 struct logicalVolIntegrityDesc *lvid;
1813 struct logicalVolIntegrityDescImpUse *lvidiu;
1814
1815 if (!bh)
1816 return;
1817
1818 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1819
1820 if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN)
1821 return;
1822
1823 lvidiu = udf_sb_lvidiu(sbi);
1824 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1825 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1826 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1827 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1828 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1829 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1830 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1831 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1832 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1833 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1834
1835 lvid->descTag.descCRC = cpu_to_le16(
1836 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1837 le16_to_cpu(lvid->descTag.descCRCLength)));
1838
1839 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1840 mark_buffer_dirty(bh);
1841 }
1842
1843 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1844 {
1845 int i;
1846 int nr_groups = bitmap->s_nr_groups;
1847 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1848 nr_groups);
1849
1850 for (i = 0; i < nr_groups; i++)
1851 if (bitmap->s_block_bitmap[i])
1852 brelse(bitmap->s_block_bitmap[i]);
1853
1854 if (size <= PAGE_SIZE)
1855 kfree(bitmap);
1856 else
1857 vfree(bitmap);
1858 }
1859
1860 static void udf_free_partition(struct udf_part_map *map)
1861 {
1862 int i;
1863 struct udf_meta_data *mdata;
1864
1865 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1866 iput(map->s_uspace.s_table);
1867 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1868 iput(map->s_fspace.s_table);
1869 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1870 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1871 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1872 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1873 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1874 for (i = 0; i < 4; i++)
1875 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1876 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1877 mdata = &map->s_type_specific.s_metadata;
1878 iput(mdata->s_metadata_fe);
1879 mdata->s_metadata_fe = NULL;
1880
1881 iput(mdata->s_mirror_fe);
1882 mdata->s_mirror_fe = NULL;
1883
1884 iput(mdata->s_bitmap_fe);
1885 mdata->s_bitmap_fe = NULL;
1886 }
1887 }
1888
1889 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1890 {
1891 int i;
1892 struct inode *inode = NULL;
1893 struct udf_options uopt;
1894 struct kernel_lb_addr rootdir, fileset;
1895 struct udf_sb_info *sbi;
1896
1897 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1898 uopt.uid = -1;
1899 uopt.gid = -1;
1900 uopt.umask = 0;
1901 uopt.fmode = UDF_INVALID_MODE;
1902 uopt.dmode = UDF_INVALID_MODE;
1903
1904 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1905 if (!sbi)
1906 return -ENOMEM;
1907
1908 sb->s_fs_info = sbi;
1909
1910 mutex_init(&sbi->s_alloc_mutex);
1911
1912 if (!udf_parse_options((char *)options, &uopt, false))
1913 goto error_out;
1914
1915 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1916 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1917 udf_error(sb, "udf_read_super",
1918 "utf8 cannot be combined with iocharset\n");
1919 goto error_out;
1920 }
1921 #ifdef CONFIG_UDF_NLS
1922 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1923 uopt.nls_map = load_nls_default();
1924 if (!uopt.nls_map)
1925 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1926 else
1927 udf_debug("Using default NLS map\n");
1928 }
1929 #endif
1930 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1931 uopt.flags |= (1 << UDF_FLAG_UTF8);
1932
1933 fileset.logicalBlockNum = 0xFFFFFFFF;
1934 fileset.partitionReferenceNum = 0xFFFF;
1935
1936 sbi->s_flags = uopt.flags;
1937 sbi->s_uid = uopt.uid;
1938 sbi->s_gid = uopt.gid;
1939 sbi->s_umask = uopt.umask;
1940 sbi->s_fmode = uopt.fmode;
1941 sbi->s_dmode = uopt.dmode;
1942 sbi->s_nls_map = uopt.nls_map;
1943
1944 /* Set the block size for all transfers */
1945 if (!sb_min_blocksize(sb, uopt.blocksize)) {
1946 udf_debug("Bad block size (%d)\n", uopt.blocksize);
1947 printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize);
1948 goto error_out;
1949 }
1950
1951 if (uopt.session == 0xFFFFFFFF)
1952 sbi->s_session = udf_get_last_session(sb);
1953 else
1954 sbi->s_session = uopt.session;
1955
1956 udf_debug("Multi-session=%d\n", sbi->s_session);
1957
1958 sbi->s_last_block = uopt.lastblock;
1959 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1960 sbi->s_anchor[2] = uopt.anchor;
1961
1962 if (udf_check_valid(sb, uopt.novrs, silent)) {
1963 /* read volume recognition sequences */
1964 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1965 goto error_out;
1966 }
1967
1968 udf_find_anchor(sb);
1969
1970 /* Fill in the rest of the superblock */
1971 sb->s_op = &udf_sb_ops;
1972 sb->s_export_op = &udf_export_ops;
1973 sb->dq_op = NULL;
1974 sb->s_dirt = 0;
1975 sb->s_magic = UDF_SUPER_MAGIC;
1976 sb->s_time_gran = 1000;
1977
1978 if (udf_load_sequence(sb, &fileset)) {
1979 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1980 goto error_out;
1981 }
1982
1983 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1984
1985 if (sbi->s_lvid_bh) {
1986 struct logicalVolIntegrityDescImpUse *lvidiu =
1987 udf_sb_lvidiu(sbi);
1988 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1989 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1990 /* uint16_t maxUDFWriteRev =
1991 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1992
1993 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1994 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1995 "(max is %x)\n",
1996 le16_to_cpu(lvidiu->minUDFReadRev),
1997 UDF_MAX_READ_VERSION);
1998 goto error_out;
1999 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
2000 sb->s_flags |= MS_RDONLY;
2001
2002 sbi->s_udfrev = minUDFWriteRev;
2003
2004 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2005 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2006 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2007 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2008 }
2009
2010 if (!sbi->s_partitions) {
2011 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
2012 goto error_out;
2013 }
2014
2015 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2016 UDF_PART_FLAG_READ_ONLY) {
2017 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2018 "forcing readonly mount\n");
2019 sb->s_flags |= MS_RDONLY;
2020 }
2021
2022 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2023 printk(KERN_WARNING "UDF-fs: No fileset found\n");
2024 goto error_out;
2025 }
2026
2027 if (!silent) {
2028 struct timestamp ts;
2029 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2030 udf_info("UDF: Mounting volume '%s', "
2031 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2032 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2033 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2034 }
2035 if (!(sb->s_flags & MS_RDONLY))
2036 udf_open_lvid(sb);
2037
2038 /* Assign the root inode */
2039 /* assign inodes by physical block number */
2040 /* perhaps it's not extensible enough, but for now ... */
2041 inode = udf_iget(sb, &rootdir);
2042 if (!inode) {
2043 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2044 "partition=%d\n",
2045 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2046 goto error_out;
2047 }
2048
2049 /* Allocate a dentry for the root inode */
2050 sb->s_root = d_alloc_root(inode);
2051 if (!sb->s_root) {
2052 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
2053 iput(inode);
2054 goto error_out;
2055 }
2056 sb->s_maxbytes = MAX_LFS_FILESIZE;
2057 return 0;
2058
2059 error_out:
2060 if (sbi->s_vat_inode)
2061 iput(sbi->s_vat_inode);
2062 if (sbi->s_partitions)
2063 for (i = 0; i < sbi->s_partitions; i++)
2064 udf_free_partition(&sbi->s_partmaps[i]);
2065 #ifdef CONFIG_UDF_NLS
2066 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2067 unload_nls(sbi->s_nls_map);
2068 #endif
2069 if (!(sb->s_flags & MS_RDONLY))
2070 udf_close_lvid(sb);
2071 brelse(sbi->s_lvid_bh);
2072
2073 kfree(sbi->s_partmaps);
2074 kfree(sbi);
2075 sb->s_fs_info = NULL;
2076
2077 return -EINVAL;
2078 }
2079
2080 static void udf_error(struct super_block *sb, const char *function,
2081 const char *fmt, ...)
2082 {
2083 va_list args;
2084
2085 if (!(sb->s_flags & MS_RDONLY)) {
2086 /* mark sb error */
2087 sb->s_dirt = 1;
2088 }
2089 va_start(args, fmt);
2090 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2091 va_end(args);
2092 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
2093 sb->s_id, function, error_buf);
2094 }
2095
2096 void udf_warning(struct super_block *sb, const char *function,
2097 const char *fmt, ...)
2098 {
2099 va_list args;
2100
2101 va_start(args, fmt);
2102 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2103 va_end(args);
2104 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
2105 sb->s_id, function, error_buf);
2106 }
2107
2108 static void udf_put_super(struct super_block *sb)
2109 {
2110 int i;
2111 struct udf_sb_info *sbi;
2112
2113 sbi = UDF_SB(sb);
2114 if (sbi->s_vat_inode)
2115 iput(sbi->s_vat_inode);
2116 if (sbi->s_partitions)
2117 for (i = 0; i < sbi->s_partitions; i++)
2118 udf_free_partition(&sbi->s_partmaps[i]);
2119 #ifdef CONFIG_UDF_NLS
2120 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2121 unload_nls(sbi->s_nls_map);
2122 #endif
2123 if (!(sb->s_flags & MS_RDONLY))
2124 udf_close_lvid(sb);
2125 brelse(sbi->s_lvid_bh);
2126 kfree(sbi->s_partmaps);
2127 kfree(sb->s_fs_info);
2128 sb->s_fs_info = NULL;
2129 }
2130
2131 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2132 {
2133 struct super_block *sb = dentry->d_sb;
2134 struct udf_sb_info *sbi = UDF_SB(sb);
2135 struct logicalVolIntegrityDescImpUse *lvidiu;
2136 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2137
2138 if (sbi->s_lvid_bh != NULL)
2139 lvidiu = udf_sb_lvidiu(sbi);
2140 else
2141 lvidiu = NULL;
2142
2143 buf->f_type = UDF_SUPER_MAGIC;
2144 buf->f_bsize = sb->s_blocksize;
2145 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2146 buf->f_bfree = udf_count_free(sb);
2147 buf->f_bavail = buf->f_bfree;
2148 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2149 le32_to_cpu(lvidiu->numDirs)) : 0)
2150 + buf->f_bfree;
2151 buf->f_ffree = buf->f_bfree;
2152 buf->f_namelen = UDF_NAME_LEN - 2;
2153 buf->f_fsid.val[0] = (u32)id;
2154 buf->f_fsid.val[1] = (u32)(id >> 32);
2155
2156 return 0;
2157 }
2158
2159 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2160 struct udf_bitmap *bitmap)
2161 {
2162 struct buffer_head *bh = NULL;
2163 unsigned int accum = 0;
2164 int index;
2165 int block = 0, newblock;
2166 struct kernel_lb_addr loc;
2167 uint32_t bytes;
2168 uint8_t *ptr;
2169 uint16_t ident;
2170 struct spaceBitmapDesc *bm;
2171
2172 lock_kernel();
2173
2174 loc.logicalBlockNum = bitmap->s_extPosition;
2175 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2176 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2177
2178 if (!bh) {
2179 printk(KERN_ERR "udf: udf_count_free failed\n");
2180 goto out;
2181 } else if (ident != TAG_IDENT_SBD) {
2182 brelse(bh);
2183 printk(KERN_ERR "udf: udf_count_free failed\n");
2184 goto out;
2185 }
2186
2187 bm = (struct spaceBitmapDesc *)bh->b_data;
2188 bytes = le32_to_cpu(bm->numOfBytes);
2189 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2190 ptr = (uint8_t *)bh->b_data;
2191
2192 while (bytes > 0) {
2193 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2194 accum += bitmap_weight((const unsigned long *)(ptr + index),
2195 cur_bytes * 8);
2196 bytes -= cur_bytes;
2197 if (bytes) {
2198 brelse(bh);
2199 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2200 bh = udf_tread(sb, newblock);
2201 if (!bh) {
2202 udf_debug("read failed\n");
2203 goto out;
2204 }
2205 index = 0;
2206 ptr = (uint8_t *)bh->b_data;
2207 }
2208 }
2209 brelse(bh);
2210
2211 out:
2212 unlock_kernel();
2213
2214 return accum;
2215 }
2216
2217 static unsigned int udf_count_free_table(struct super_block *sb,
2218 struct inode *table)
2219 {
2220 unsigned int accum = 0;
2221 uint32_t elen;
2222 struct kernel_lb_addr eloc;
2223 int8_t etype;
2224 struct extent_position epos;
2225
2226 lock_kernel();
2227
2228 epos.block = UDF_I(table)->i_location;
2229 epos.offset = sizeof(struct unallocSpaceEntry);
2230 epos.bh = NULL;
2231
2232 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2233 accum += (elen >> table->i_sb->s_blocksize_bits);
2234
2235 brelse(epos.bh);
2236
2237 unlock_kernel();
2238
2239 return accum;
2240 }
2241
2242 static unsigned int udf_count_free(struct super_block *sb)
2243 {
2244 unsigned int accum = 0;
2245 struct udf_sb_info *sbi;
2246 struct udf_part_map *map;
2247
2248 sbi = UDF_SB(sb);
2249 if (sbi->s_lvid_bh) {
2250 struct logicalVolIntegrityDesc *lvid =
2251 (struct logicalVolIntegrityDesc *)
2252 sbi->s_lvid_bh->b_data;
2253 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2254 accum = le32_to_cpu(
2255 lvid->freeSpaceTable[sbi->s_partition]);
2256 if (accum == 0xFFFFFFFF)
2257 accum = 0;
2258 }
2259 }
2260
2261 if (accum)
2262 return accum;
2263
2264 map = &sbi->s_partmaps[sbi->s_partition];
2265 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2266 accum += udf_count_free_bitmap(sb,
2267 map->s_uspace.s_bitmap);
2268 }
2269 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2270 accum += udf_count_free_bitmap(sb,
2271 map->s_fspace.s_bitmap);
2272 }
2273 if (accum)
2274 return accum;
2275
2276 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2277 accum += udf_count_free_table(sb,
2278 map->s_uspace.s_table);
2279 }
2280 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2281 accum += udf_count_free_table(sb,
2282 map->s_fspace.s_table);
2283 }
2284
2285 return accum;
2286 }
Support for the Chinese Samsung S3C2440 based development boards