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udf: Silence warning about accesses beyond end of device
[linux-2.6/mini2440.git] / fs / udf / super.c
blob28ed3f5ebd701c272b01759cd6466ed0d7223957
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 <asm/byteorder.h>
60
61 #include "udf_sb.h"
62 #include "udf_i.h"
63
64 #include <linux/init.h>
65 #include <asm/uaccess.h>
66
67 #define VDS_POS_PRIMARY_VOL_DESC 0
68 #define VDS_POS_UNALLOC_SPACE_DESC 1
69 #define VDS_POS_LOGICAL_VOL_DESC 2
70 #define VDS_POS_PARTITION_DESC 3
71 #define VDS_POS_IMP_USE_VOL_DESC 4
72 #define VDS_POS_VOL_DESC_PTR 5
73 #define VDS_POS_TERMINATING_DESC 6
74 #define VDS_POS_LENGTH 7
75
76 #define UDF_DEFAULT_BLOCKSIZE 2048
77
78 static char error_buf[1024];
79
80 /* These are the "meat" - everything else is stuffing */
81 static int udf_fill_super(struct super_block *, void *, int);
82 static void udf_put_super(struct super_block *);
83 static void udf_write_super(struct super_block *);
84 static int udf_remount_fs(struct super_block *, int *, char *);
85 static int udf_check_valid(struct super_block *, int, int);
86 static int udf_vrs(struct super_block *sb, int silent);
87 static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
88 static void udf_find_anchor(struct super_block *);
89 static int udf_find_fileset(struct super_block *, kernel_lb_addr *,
90 kernel_lb_addr *);
91 static void udf_load_fileset(struct super_block *, struct buffer_head *,
92 kernel_lb_addr *);
93 static void udf_open_lvid(struct super_block *);
94 static void udf_close_lvid(struct super_block *);
95 static unsigned int udf_count_free(struct super_block *);
96 static int udf_statfs(struct dentry *, struct kstatfs *);
97 static int udf_show_options(struct seq_file *, struct vfsmount *);
98 static void udf_error(struct super_block *sb, const char *function,
99 const char *fmt, ...);
100
101 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
102 {
103 struct logicalVolIntegrityDesc *lvid =
104 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
105 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
106 __u32 offset = number_of_partitions * 2 *
107 sizeof(uint32_t)/sizeof(uint8_t);
108 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
109 }
110
111 /* UDF filesystem type */
112 static int udf_get_sb(struct file_system_type *fs_type,
113 int flags, const char *dev_name, void *data,
114 struct vfsmount *mnt)
115 {
116 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
117 }
118
119 static struct file_system_type udf_fstype = {
120 .owner = THIS_MODULE,
121 .name = "udf",
122 .get_sb = udf_get_sb,
123 .kill_sb = kill_block_super,
124 .fs_flags = FS_REQUIRES_DEV,
125 };
126
127 static struct kmem_cache *udf_inode_cachep;
128
129 static struct inode *udf_alloc_inode(struct super_block *sb)
130 {
131 struct udf_inode_info *ei;
132 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
133 if (!ei)
134 return NULL;
135
136 ei->i_unique = 0;
137 ei->i_lenExtents = 0;
138 ei->i_next_alloc_block = 0;
139 ei->i_next_alloc_goal = 0;
140 ei->i_strat4096 = 0;
141
142 return &ei->vfs_inode;
143 }
144
145 static void udf_destroy_inode(struct inode *inode)
146 {
147 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
148 }
149
150 static void init_once(struct kmem_cache *cachep, void *foo)
151 {
152 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
153
154 ei->i_ext.i_data = NULL;
155 inode_init_once(&ei->vfs_inode);
156 }
157
158 static int init_inodecache(void)
159 {
160 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
161 sizeof(struct udf_inode_info),
162 0, (SLAB_RECLAIM_ACCOUNT |
163 SLAB_MEM_SPREAD),
164 init_once);
165 if (!udf_inode_cachep)
166 return -ENOMEM;
167 return 0;
168 }
169
170 static void destroy_inodecache(void)
171 {
172 kmem_cache_destroy(udf_inode_cachep);
173 }
174
175 /* Superblock operations */
176 static const struct super_operations udf_sb_ops = {
177 .alloc_inode = udf_alloc_inode,
178 .destroy_inode = udf_destroy_inode,
179 .write_inode = udf_write_inode,
180 .delete_inode = udf_delete_inode,
181 .clear_inode = udf_clear_inode,
182 .put_super = udf_put_super,
183 .write_super = udf_write_super,
184 .statfs = udf_statfs,
185 .remount_fs = udf_remount_fs,
186 .show_options = udf_show_options,
187 };
188
189 struct udf_options {
190 unsigned char novrs;
191 unsigned int blocksize;
192 unsigned int session;
193 unsigned int lastblock;
194 unsigned int anchor;
195 unsigned int volume;
196 unsigned short partition;
197 unsigned int fileset;
198 unsigned int rootdir;
199 unsigned int flags;
200 mode_t umask;
201 gid_t gid;
202 uid_t uid;
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, __FUNCTION__,
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 (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE)
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 (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
285 seq_printf(seq, ",session=%u", sbi->s_session);
286 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
287 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
288 /*
289 * s_anchor[2] could be zeroed out in case there is no anchor
290 * in the specified block, but then the "anchor=N" option
291 * originally given by the user wasn't effective, so it's OK
292 * if we don't show it.
293 */
294 if (sbi->s_anchor[2] != 0)
295 seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]);
296 /*
297 * volume, partition, fileset and rootdir seem to be ignored
298 * currently
299 */
300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
301 seq_puts(seq, ",utf8");
302 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
303 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
304
305 return 0;
306 }
307
308 /*
309 * udf_parse_options
310 *
311 * PURPOSE
312 * Parse mount options.
313 *
314 * DESCRIPTION
315 * The following mount options are supported:
316 *
317 * gid= Set the default group.
318 * umask= Set the default umask.
319 * 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 };
370
371 static match_table_t tokens = {
372 {Opt_novrs, "novrs"},
373 {Opt_nostrict, "nostrict"},
374 {Opt_bs, "bs=%u"},
375 {Opt_unhide, "unhide"},
376 {Opt_undelete, "undelete"},
377 {Opt_noadinicb, "noadinicb"},
378 {Opt_adinicb, "adinicb"},
379 {Opt_shortad, "shortad"},
380 {Opt_longad, "longad"},
381 {Opt_uforget, "uid=forget"},
382 {Opt_uignore, "uid=ignore"},
383 {Opt_gforget, "gid=forget"},
384 {Opt_gignore, "gid=ignore"},
385 {Opt_gid, "gid=%u"},
386 {Opt_uid, "uid=%u"},
387 {Opt_umask, "umask=%o"},
388 {Opt_session, "session=%u"},
389 {Opt_lastblock, "lastblock=%u"},
390 {Opt_anchor, "anchor=%u"},
391 {Opt_volume, "volume=%u"},
392 {Opt_partition, "partition=%u"},
393 {Opt_fileset, "fileset=%u"},
394 {Opt_rootdir, "rootdir=%u"},
395 {Opt_utf8, "utf8"},
396 {Opt_iocharset, "iocharset=%s"},
397 {Opt_err, NULL}
398 };
399
400 static int udf_parse_options(char *options, struct udf_options *uopt,
401 bool remount)
402 {
403 char *p;
404 int option;
405
406 uopt->novrs = 0;
407 uopt->blocksize = UDF_DEFAULT_BLOCKSIZE;
408 uopt->partition = 0xFFFF;
409 uopt->session = 0xFFFFFFFF;
410 uopt->lastblock = 0;
411 uopt->anchor = 0;
412 uopt->volume = 0xFFFFFFFF;
413 uopt->rootdir = 0xFFFFFFFF;
414 uopt->fileset = 0xFFFFFFFF;
415 uopt->nls_map = NULL;
416
417 if (!options)
418 return 1;
419
420 while ((p = strsep(&options, ",")) != NULL) {
421 substring_t args[MAX_OPT_ARGS];
422 int token;
423 if (!*p)
424 continue;
425
426 token = match_token(p, tokens, args);
427 switch (token) {
428 case Opt_novrs:
429 uopt->novrs = 1;
430 case Opt_bs:
431 if (match_int(&args[0], &option))
432 return 0;
433 uopt->blocksize = option;
434 break;
435 case Opt_unhide:
436 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
437 break;
438 case Opt_undelete:
439 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
440 break;
441 case Opt_noadinicb:
442 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
443 break;
444 case Opt_adinicb:
445 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
446 break;
447 case Opt_shortad:
448 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
449 break;
450 case Opt_longad:
451 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
452 break;
453 case Opt_gid:
454 if (match_int(args, &option))
455 return 0;
456 uopt->gid = option;
457 uopt->flags |= (1 << UDF_FLAG_GID_SET);
458 break;
459 case Opt_uid:
460 if (match_int(args, &option))
461 return 0;
462 uopt->uid = option;
463 uopt->flags |= (1 << UDF_FLAG_UID_SET);
464 break;
465 case Opt_umask:
466 if (match_octal(args, &option))
467 return 0;
468 uopt->umask = option;
469 break;
470 case Opt_nostrict:
471 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
472 break;
473 case Opt_session:
474 if (match_int(args, &option))
475 return 0;
476 uopt->session = option;
477 if (!remount)
478 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
479 break;
480 case Opt_lastblock:
481 if (match_int(args, &option))
482 return 0;
483 uopt->lastblock = option;
484 if (!remount)
485 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
486 break;
487 case Opt_anchor:
488 if (match_int(args, &option))
489 return 0;
490 uopt->anchor = option;
491 break;
492 case Opt_volume:
493 if (match_int(args, &option))
494 return 0;
495 uopt->volume = option;
496 break;
497 case Opt_partition:
498 if (match_int(args, &option))
499 return 0;
500 uopt->partition = option;
501 break;
502 case Opt_fileset:
503 if (match_int(args, &option))
504 return 0;
505 uopt->fileset = option;
506 break;
507 case Opt_rootdir:
508 if (match_int(args, &option))
509 return 0;
510 uopt->rootdir = option;
511 break;
512 case Opt_utf8:
513 uopt->flags |= (1 << UDF_FLAG_UTF8);
514 break;
515 #ifdef CONFIG_UDF_NLS
516 case Opt_iocharset:
517 uopt->nls_map = load_nls(args[0].from);
518 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
519 break;
520 #endif
521 case Opt_uignore:
522 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
523 break;
524 case Opt_uforget:
525 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
526 break;
527 case Opt_gignore:
528 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
529 break;
530 case Opt_gforget:
531 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
532 break;
533 default:
534 printk(KERN_ERR "udf: bad mount option \"%s\" "
535 "or missing value\n", p);
536 return 0;
537 }
538 }
539 return 1;
540 }
541
542 static void udf_write_super(struct super_block *sb)
543 {
544 lock_kernel();
545
546 if (!(sb->s_flags & MS_RDONLY))
547 udf_open_lvid(sb);
548 sb->s_dirt = 0;
549
550 unlock_kernel();
551 }
552
553 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
554 {
555 struct udf_options uopt;
556 struct udf_sb_info *sbi = UDF_SB(sb);
557
558 uopt.flags = sbi->s_flags;
559 uopt.uid = sbi->s_uid;
560 uopt.gid = sbi->s_gid;
561 uopt.umask = sbi->s_umask;
562
563 if (!udf_parse_options(options, &uopt, true))
564 return -EINVAL;
565
566 sbi->s_flags = uopt.flags;
567 sbi->s_uid = uopt.uid;
568 sbi->s_gid = uopt.gid;
569 sbi->s_umask = uopt.umask;
570
571 if (sbi->s_lvid_bh) {
572 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
573 if (write_rev > UDF_MAX_WRITE_VERSION)
574 *flags |= MS_RDONLY;
575 }
576
577 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
578 return 0;
579 if (*flags & MS_RDONLY)
580 udf_close_lvid(sb);
581 else
582 udf_open_lvid(sb);
583
584 return 0;
585 }
586
587 static int udf_vrs(struct super_block *sb, int silent)
588 {
589 struct volStructDesc *vsd = NULL;
590 int sector = 32768;
591 int sectorsize;
592 struct buffer_head *bh = NULL;
593 int iso9660 = 0;
594 int nsr02 = 0;
595 int nsr03 = 0;
596 struct udf_sb_info *sbi;
597
598 /* Block size must be a multiple of 512 */
599 if (sb->s_blocksize & 511)
600 return 0;
601 sbi = UDF_SB(sb);
602
603 if (sb->s_blocksize < sizeof(struct volStructDesc))
604 sectorsize = sizeof(struct volStructDesc);
605 else
606 sectorsize = sb->s_blocksize;
607
608 sector += (sbi->s_session << sb->s_blocksize_bits);
609
610 udf_debug("Starting at sector %u (%ld byte sectors)\n",
611 (sector >> sb->s_blocksize_bits), sb->s_blocksize);
612 /* Process the sequence (if applicable) */
613 for (; !nsr02 && !nsr03; sector += sectorsize) {
614 /* Read a block */
615 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
616 if (!bh)
617 break;
618
619 /* Look for ISO descriptors */
620 vsd = (struct volStructDesc *)(bh->b_data +
621 (sector & (sb->s_blocksize - 1)));
622
623 if (vsd->stdIdent[0] == 0) {
624 brelse(bh);
625 break;
626 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
627 VSD_STD_ID_LEN)) {
628 iso9660 = sector;
629 switch (vsd->structType) {
630 case 0:
631 udf_debug("ISO9660 Boot Record found\n");
632 break;
633 case 1:
634 udf_debug("ISO9660 Primary Volume Descriptor "
635 "found\n");
636 break;
637 case 2:
638 udf_debug("ISO9660 Supplementary Volume "
639 "Descriptor found\n");
640 break;
641 case 3:
642 udf_debug("ISO9660 Volume Partition Descriptor "
643 "found\n");
644 break;
645 case 255:
646 udf_debug("ISO9660 Volume Descriptor Set "
647 "Terminator found\n");
648 break;
649 default:
650 udf_debug("ISO9660 VRS (%u) found\n",
651 vsd->structType);
652 break;
653 }
654 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
655 VSD_STD_ID_LEN))
656 ; /* nothing */
657 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
658 VSD_STD_ID_LEN)) {
659 brelse(bh);
660 break;
661 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
662 VSD_STD_ID_LEN))
663 nsr02 = sector;
664 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
665 VSD_STD_ID_LEN))
666 nsr03 = sector;
667 brelse(bh);
668 }
669
670 if (nsr03)
671 return nsr03;
672 else if (nsr02)
673 return nsr02;
674 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
675 return -1;
676 else
677 return 0;
678 }
679
680 /*
681 * Check whether there is an anchor block in the given block
682 */
683 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
684 bool varconv)
685 {
686 struct buffer_head *bh = NULL;
687 tag *t;
688 uint16_t ident;
689 uint32_t location;
690
691 if (varconv) {
692 if (udf_fixed_to_variable(block) >=
693 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
694 return 0;
695 bh = sb_bread(sb, udf_fixed_to_variable(block));
696 }
697 else
698 bh = sb_bread(sb, block);
699
700 if (!bh)
701 return 0;
702
703 t = (tag *)bh->b_data;
704 ident = le16_to_cpu(t->tagIdent);
705 location = le32_to_cpu(t->tagLocation);
706 brelse(bh);
707 if (ident != TAG_IDENT_AVDP)
708 return 0;
709 return location == block;
710 }
711
712 /* Search for an anchor volume descriptor pointer */
713 static sector_t udf_scan_anchors(struct super_block *sb, bool varconv,
714 sector_t lastblock)
715 {
716 sector_t last[6];
717 int i;
718 struct udf_sb_info *sbi = UDF_SB(sb);
719
720 last[0] = lastblock;
721 last[1] = last[0] - 1;
722 last[2] = last[0] + 1;
723 last[3] = last[0] - 2;
724 last[4] = last[0] - 150;
725 last[5] = last[0] - 152;
726
727 /* according to spec, anchor is in either:
728 * block 256
729 * lastblock-256
730 * lastblock
731 * however, if the disc isn't closed, it could be 512 */
732
733 for (i = 0; i < ARRAY_SIZE(last); i++) {
734 if (last[i] < 0)
735 continue;
736 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
737 sb->s_blocksize_bits)
738 continue;
739
740 if (udf_check_anchor_block(sb, last[i], varconv)) {
741 sbi->s_anchor[0] = last[i];
742 sbi->s_anchor[1] = last[i] - 256;
743 return last[i];
744 }
745
746 if (last[i] < 256)
747 continue;
748
749 if (udf_check_anchor_block(sb, last[i] - 256, varconv)) {
750 sbi->s_anchor[1] = last[i] - 256;
751 return last[i];
752 }
753 }
754
755 if (udf_check_anchor_block(sb, sbi->s_session + 256, varconv)) {
756 sbi->s_anchor[0] = sbi->s_session + 256;
757 return last[0];
758 }
759 if (udf_check_anchor_block(sb, sbi->s_session + 512, varconv)) {
760 sbi->s_anchor[0] = sbi->s_session + 512;
761 return last[0];
762 }
763 return 0;
764 }
765
766 /*
767 * Find an anchor volume descriptor. The function expects sbi->s_lastblock to
768 * be the last block on the media.
769 *
770 * Return 1 if not found, 0 if ok
771 *
772 */
773 static void udf_find_anchor(struct super_block *sb)
774 {
775 sector_t lastblock;
776 struct buffer_head *bh = NULL;
777 uint16_t ident;
778 int i;
779 struct udf_sb_info *sbi = UDF_SB(sb);
780
781 lastblock = udf_scan_anchors(sb, 0, sbi->s_last_block);
782 if (lastblock)
783 goto check_anchor;
784
785 /* No anchor found? Try VARCONV conversion of block numbers */
786 /* Firstly, we try to not convert number of the last block */
787 lastblock = udf_scan_anchors(sb, 1,
788 udf_variable_to_fixed(sbi->s_last_block));
789 if (lastblock) {
790 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
791 goto check_anchor;
792 }
793
794 /* Secondly, we try with converted number of the last block */
795 lastblock = udf_scan_anchors(sb, 1, sbi->s_last_block);
796 if (lastblock)
797 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
798
799 check_anchor:
800 /*
801 * Check located anchors and the anchor block supplied via
802 * mount options
803 */
804 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
805 if (!sbi->s_anchor[i])
806 continue;
807 bh = udf_read_tagged(sb, sbi->s_anchor[i],
808 sbi->s_anchor[i], &ident);
809 if (!bh)
810 sbi->s_anchor[i] = 0;
811 else {
812 brelse(bh);
813 if (ident != TAG_IDENT_AVDP)
814 sbi->s_anchor[i] = 0;
815 }
816 }
817
818 sbi->s_last_block = lastblock;
819 }
820
821 static int udf_find_fileset(struct super_block *sb,
822 kernel_lb_addr *fileset,
823 kernel_lb_addr *root)
824 {
825 struct buffer_head *bh = NULL;
826 long lastblock;
827 uint16_t ident;
828 struct udf_sb_info *sbi;
829
830 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
831 fileset->partitionReferenceNum != 0xFFFF) {
832 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
833
834 if (!bh) {
835 return 1;
836 } else if (ident != TAG_IDENT_FSD) {
837 brelse(bh);
838 return 1;
839 }
840
841 }
842
843 sbi = UDF_SB(sb);
844 if (!bh) {
845 /* Search backwards through the partitions */
846 kernel_lb_addr newfileset;
847
848 /* --> cvg: FIXME - is it reasonable? */
849 return 1;
850
851 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
852 (newfileset.partitionReferenceNum != 0xFFFF &&
853 fileset->logicalBlockNum == 0xFFFFFFFF &&
854 fileset->partitionReferenceNum == 0xFFFF);
855 newfileset.partitionReferenceNum--) {
856 lastblock = sbi->s_partmaps
857 [newfileset.partitionReferenceNum]
858 .s_partition_len;
859 newfileset.logicalBlockNum = 0;
860
861 do {
862 bh = udf_read_ptagged(sb, newfileset, 0,
863 &ident);
864 if (!bh) {
865 newfileset.logicalBlockNum++;
866 continue;
867 }
868
869 switch (ident) {
870 case TAG_IDENT_SBD:
871 {
872 struct spaceBitmapDesc *sp;
873 sp = (struct spaceBitmapDesc *)
874 bh->b_data;
875 newfileset.logicalBlockNum += 1 +
876 ((le32_to_cpu(sp->numOfBytes) +
877 sizeof(struct spaceBitmapDesc)
878 - 1) >> sb->s_blocksize_bits);
879 brelse(bh);
880 break;
881 }
882 case TAG_IDENT_FSD:
883 *fileset = newfileset;
884 break;
885 default:
886 newfileset.logicalBlockNum++;
887 brelse(bh);
888 bh = NULL;
889 break;
890 }
891 } while (newfileset.logicalBlockNum < lastblock &&
892 fileset->logicalBlockNum == 0xFFFFFFFF &&
893 fileset->partitionReferenceNum == 0xFFFF);
894 }
895 }
896
897 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
898 fileset->partitionReferenceNum != 0xFFFF) && bh) {
899 udf_debug("Fileset at block=%d, partition=%d\n",
900 fileset->logicalBlockNum,
901 fileset->partitionReferenceNum);
902
903 sbi->s_partition = fileset->partitionReferenceNum;
904 udf_load_fileset(sb, bh, root);
905 brelse(bh);
906 return 0;
907 }
908 return 1;
909 }
910
911 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
912 {
913 struct primaryVolDesc *pvoldesc;
914 struct ustr instr;
915 struct ustr outstr;
916 struct buffer_head *bh;
917 uint16_t ident;
918
919 bh = udf_read_tagged(sb, block, block, &ident);
920 if (!bh)
921 return 1;
922 BUG_ON(ident != TAG_IDENT_PVD);
923
924 pvoldesc = (struct primaryVolDesc *)bh->b_data;
925
926 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
927 pvoldesc->recordingDateAndTime)) {
928 #ifdef UDFFS_DEBUG
929 timestamp *ts = &pvoldesc->recordingDateAndTime;
930 udf_debug("recording time %04u/%02u/%02u"
931 " %02u:%02u (%x)\n",
932 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
933 ts->minute, le16_to_cpu(ts->typeAndTimezone));
934 #endif
935 }
936
937 if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32))
938 if (udf_CS0toUTF8(&outstr, &instr)) {
939 strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name,
940 outstr.u_len > 31 ? 31 : outstr.u_len);
941 udf_debug("volIdent[] = '%s'\n",
942 UDF_SB(sb)->s_volume_ident);
943 }
944
945 if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128))
946 if (udf_CS0toUTF8(&outstr, &instr))
947 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
948
949 brelse(bh);
950 return 0;
951 }
952
953 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
954 kernel_lb_addr *root)
955 {
956 struct fileSetDesc *fset;
957
958 fset = (struct fileSetDesc *)bh->b_data;
959
960 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
961
962 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
963
964 udf_debug("Rootdir at block=%d, partition=%d\n",
965 root->logicalBlockNum, root->partitionReferenceNum);
966 }
967
968 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
969 {
970 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
971 return DIV_ROUND_UP(map->s_partition_len +
972 (sizeof(struct spaceBitmapDesc) << 3),
973 sb->s_blocksize * 8);
974 }
975
976 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
977 {
978 struct udf_bitmap *bitmap;
979 int nr_groups;
980 int size;
981
982 nr_groups = udf_compute_nr_groups(sb, index);
983 size = sizeof(struct udf_bitmap) +
984 (sizeof(struct buffer_head *) * nr_groups);
985
986 if (size <= PAGE_SIZE)
987 bitmap = kmalloc(size, GFP_KERNEL);
988 else
989 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
990
991 if (bitmap == NULL) {
992 udf_error(sb, __FUNCTION__,
993 "Unable to allocate space for bitmap "
994 "and %d buffer_head pointers", nr_groups);
995 return NULL;
996 }
997
998 memset(bitmap, 0x00, size);
999 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1000 bitmap->s_nr_groups = nr_groups;
1001 return bitmap;
1002 }
1003
1004 static int udf_fill_partdesc_info(struct super_block *sb,
1005 struct partitionDesc *p, int p_index)
1006 {
1007 struct udf_part_map *map;
1008 struct udf_sb_info *sbi = UDF_SB(sb);
1009 struct partitionHeaderDesc *phd;
1010
1011 map = &sbi->s_partmaps[p_index];
1012
1013 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1014 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1015
1016 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1017 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1018 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1019 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1020 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1021 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1022 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1023 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1024
1025 udf_debug("Partition (%d:%d type %x) starts at physical %d, "
1026 "block length %d\n", partitionNumber, p_index,
1027 map->s_partition_type, map->s_partition_root,
1028 map->s_partition_len);
1029
1030 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1031 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1032 return 0;
1033
1034 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1035 if (phd->unallocSpaceTable.extLength) {
1036 kernel_lb_addr loc = {
1037 .logicalBlockNum = le32_to_cpu(
1038 phd->unallocSpaceTable.extPosition),
1039 .partitionReferenceNum = p_index,
1040 };
1041
1042 map->s_uspace.s_table = udf_iget(sb, loc);
1043 if (!map->s_uspace.s_table) {
1044 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1045 p_index);
1046 return 1;
1047 }
1048 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1049 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1050 p_index, map->s_uspace.s_table->i_ino);
1051 }
1052
1053 if (phd->unallocSpaceBitmap.extLength) {
1054 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1055 if (!bitmap)
1056 return 1;
1057 map->s_uspace.s_bitmap = bitmap;
1058 bitmap->s_extLength = le32_to_cpu(
1059 phd->unallocSpaceBitmap.extLength);
1060 bitmap->s_extPosition = le32_to_cpu(
1061 phd->unallocSpaceBitmap.extPosition);
1062 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1063 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1064 bitmap->s_extPosition);
1065 }
1066
1067 if (phd->partitionIntegrityTable.extLength)
1068 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1069
1070 if (phd->freedSpaceTable.extLength) {
1071 kernel_lb_addr loc = {
1072 .logicalBlockNum = le32_to_cpu(
1073 phd->freedSpaceTable.extPosition),
1074 .partitionReferenceNum = p_index,
1075 };
1076
1077 map->s_fspace.s_table = udf_iget(sb, loc);
1078 if (!map->s_fspace.s_table) {
1079 udf_debug("cannot load freedSpaceTable (part %d)\n",
1080 p_index);
1081 return 1;
1082 }
1083
1084 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1085 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1086 p_index, map->s_fspace.s_table->i_ino);
1087 }
1088
1089 if (phd->freedSpaceBitmap.extLength) {
1090 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1091 if (!bitmap)
1092 return 1;
1093 map->s_fspace.s_bitmap = bitmap;
1094 bitmap->s_extLength = le32_to_cpu(
1095 phd->freedSpaceBitmap.extLength);
1096 bitmap->s_extPosition = le32_to_cpu(
1097 phd->freedSpaceBitmap.extPosition);
1098 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1099 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1100 bitmap->s_extPosition);
1101 }
1102 return 0;
1103 }
1104
1105 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1106 {
1107 struct udf_sb_info *sbi = UDF_SB(sb);
1108 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1109 kernel_lb_addr ino;
1110 struct buffer_head *bh;
1111
1112 /* VAT file entry is in the last recorded block */
1113 ino.partitionReferenceNum = type1_index;
1114 ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root;
1115 sbi->s_vat_inode = udf_iget(sb, ino);
1116 if (!sbi->s_vat_inode)
1117 return 1;
1118
1119 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1120 map->s_type_specific.s_virtual.s_start_offset =
1121 udf_ext0_offset(sbi->s_vat_inode);
1122 map->s_type_specific.s_virtual.s_num_entries =
1123 (sbi->s_vat_inode->i_size - 36) >> 2;
1124 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1125 uint32_t pos;
1126 struct virtualAllocationTable20 *vat20;
1127
1128 pos = udf_block_map(sbi->s_vat_inode, 0);
1129 bh = sb_bread(sb, pos);
1130 if (!bh)
1131 return 1;
1132 vat20 = (struct virtualAllocationTable20 *)bh->b_data +
1133 udf_ext0_offset(sbi->s_vat_inode);
1134 map->s_type_specific.s_virtual.s_start_offset =
1135 le16_to_cpu(vat20->lengthHeader) +
1136 udf_ext0_offset(sbi->s_vat_inode);
1137 map->s_type_specific.s_virtual.s_num_entries =
1138 (sbi->s_vat_inode->i_size -
1139 map->s_type_specific.s_virtual.
1140 s_start_offset) >> 2;
1141 brelse(bh);
1142 }
1143 return 0;
1144 }
1145
1146 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1147 {
1148 struct buffer_head *bh;
1149 struct partitionDesc *p;
1150 struct udf_part_map *map;
1151 struct udf_sb_info *sbi = UDF_SB(sb);
1152 int i, type1_idx;
1153 uint16_t partitionNumber;
1154 uint16_t ident;
1155 int ret = 0;
1156
1157 bh = udf_read_tagged(sb, block, block, &ident);
1158 if (!bh)
1159 return 1;
1160 if (ident != TAG_IDENT_PD)
1161 goto out_bh;
1162
1163 p = (struct partitionDesc *)bh->b_data;
1164 partitionNumber = le16_to_cpu(p->partitionNumber);
1165
1166 /* First scan for TYPE1 and SPARABLE partitions */
1167 for (i = 0; i < sbi->s_partitions; i++) {
1168 map = &sbi->s_partmaps[i];
1169 udf_debug("Searching map: (%d == %d)\n",
1170 map->s_partition_num, partitionNumber);
1171 if (map->s_partition_num == partitionNumber &&
1172 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1173 map->s_partition_type == UDF_SPARABLE_MAP15))
1174 break;
1175 }
1176
1177 if (i >= sbi->s_partitions) {
1178 udf_debug("Partition (%d) not found in partition map\n",
1179 partitionNumber);
1180 goto out_bh;
1181 }
1182
1183 ret = udf_fill_partdesc_info(sb, p, i);
1184
1185 /*
1186 * Now rescan for VIRTUAL partitions when TYPE1 partitions are
1187 * already set up
1188 */
1189 type1_idx = i;
1190 for (i = 0; i < sbi->s_partitions; i++) {
1191 map = &sbi->s_partmaps[i];
1192
1193 if (map->s_partition_num == partitionNumber &&
1194 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1195 map->s_partition_type == UDF_VIRTUAL_MAP20))
1196 break;
1197 }
1198
1199 if (i >= sbi->s_partitions)
1200 goto out_bh;
1201
1202 ret = udf_fill_partdesc_info(sb, p, i);
1203 if (ret)
1204 goto out_bh;
1205
1206 ret = udf_load_vat(sb, i, type1_idx);
1207 out_bh:
1208 /* In case loading failed, we handle cleanup in udf_fill_super */
1209 brelse(bh);
1210 return ret;
1211 }
1212
1213 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1214 kernel_lb_addr *fileset)
1215 {
1216 struct logicalVolDesc *lvd;
1217 int i, j, offset;
1218 uint8_t type;
1219 struct udf_sb_info *sbi = UDF_SB(sb);
1220 struct genericPartitionMap *gpm;
1221 uint16_t ident;
1222 struct buffer_head *bh;
1223 int ret = 0;
1224
1225 bh = udf_read_tagged(sb, block, block, &ident);
1226 if (!bh)
1227 return 1;
1228 BUG_ON(ident != TAG_IDENT_LVD);
1229 lvd = (struct logicalVolDesc *)bh->b_data;
1230
1231 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1232 if (i != 0) {
1233 ret = i;
1234 goto out_bh;
1235 }
1236
1237 for (i = 0, offset = 0;
1238 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1239 i++, offset += gpm->partitionMapLength) {
1240 struct udf_part_map *map = &sbi->s_partmaps[i];
1241 gpm = (struct genericPartitionMap *)
1242 &(lvd->partitionMaps[offset]);
1243 type = gpm->partitionMapType;
1244 if (type == 1) {
1245 struct genericPartitionMap1 *gpm1 =
1246 (struct genericPartitionMap1 *)gpm;
1247 map->s_partition_type = UDF_TYPE1_MAP15;
1248 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1249 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1250 map->s_partition_func = NULL;
1251 } else if (type == 2) {
1252 struct udfPartitionMap2 *upm2 =
1253 (struct udfPartitionMap2 *)gpm;
1254 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1255 strlen(UDF_ID_VIRTUAL))) {
1256 u16 suf =
1257 le16_to_cpu(((__le16 *)upm2->partIdent.
1258 identSuffix)[0]);
1259 if (suf == 0x0150) {
1260 map->s_partition_type =
1261 UDF_VIRTUAL_MAP15;
1262 map->s_partition_func =
1263 udf_get_pblock_virt15;
1264 } else if (suf == 0x0200) {
1265 map->s_partition_type =
1266 UDF_VIRTUAL_MAP20;
1267 map->s_partition_func =
1268 udf_get_pblock_virt20;
1269 }
1270 } else if (!strncmp(upm2->partIdent.ident,
1271 UDF_ID_SPARABLE,
1272 strlen(UDF_ID_SPARABLE))) {
1273 uint32_t loc;
1274 struct sparingTable *st;
1275 struct sparablePartitionMap *spm =
1276 (struct sparablePartitionMap *)gpm;
1277
1278 map->s_partition_type = UDF_SPARABLE_MAP15;
1279 map->s_type_specific.s_sparing.s_packet_len =
1280 le16_to_cpu(spm->packetLength);
1281 for (j = 0; j < spm->numSparingTables; j++) {
1282 struct buffer_head *bh2;
1283
1284 loc = le32_to_cpu(
1285 spm->locSparingTable[j]);
1286 bh2 = udf_read_tagged(sb, loc, loc,
1287 &ident);
1288 map->s_type_specific.s_sparing.
1289 s_spar_map[j] = bh2;
1290
1291 if (bh2 == NULL)
1292 continue;
1293
1294 st = (struct sparingTable *)bh2->b_data;
1295 if (ident != 0 || strncmp(
1296 st->sparingIdent.ident,
1297 UDF_ID_SPARING,
1298 strlen(UDF_ID_SPARING))) {
1299 brelse(bh2);
1300 map->s_type_specific.s_sparing.
1301 s_spar_map[j] = NULL;
1302 }
1303 }
1304 map->s_partition_func = udf_get_pblock_spar15;
1305 } else {
1306 udf_debug("Unknown ident: %s\n",
1307 upm2->partIdent.ident);
1308 continue;
1309 }
1310 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1311 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1312 }
1313 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1314 i, map->s_partition_num, type,
1315 map->s_volumeseqnum);
1316 }
1317
1318 if (fileset) {
1319 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
1320
1321 *fileset = lelb_to_cpu(la->extLocation);
1322 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1323 "partition=%d\n", fileset->logicalBlockNum,
1324 fileset->partitionReferenceNum);
1325 }
1326 if (lvd->integritySeqExt.extLength)
1327 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1328
1329 out_bh:
1330 brelse(bh);
1331 return ret;
1332 }
1333
1334 /*
1335 * udf_load_logicalvolint
1336 *
1337 */
1338 static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
1339 {
1340 struct buffer_head *bh = NULL;
1341 uint16_t ident;
1342 struct udf_sb_info *sbi = UDF_SB(sb);
1343 struct logicalVolIntegrityDesc *lvid;
1344
1345 while (loc.extLength > 0 &&
1346 (bh = udf_read_tagged(sb, loc.extLocation,
1347 loc.extLocation, &ident)) &&
1348 ident == TAG_IDENT_LVID) {
1349 sbi->s_lvid_bh = bh;
1350 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1351
1352 if (lvid->nextIntegrityExt.extLength)
1353 udf_load_logicalvolint(sb,
1354 leea_to_cpu(lvid->nextIntegrityExt));
1355
1356 if (sbi->s_lvid_bh != bh)
1357 brelse(bh);
1358 loc.extLength -= sb->s_blocksize;
1359 loc.extLocation++;
1360 }
1361 if (sbi->s_lvid_bh != bh)
1362 brelse(bh);
1363 }
1364
1365 /*
1366 * udf_process_sequence
1367 *
1368 * PURPOSE
1369 * Process a main/reserve volume descriptor sequence.
1370 *
1371 * PRE-CONDITIONS
1372 * sb Pointer to _locked_ superblock.
1373 * block First block of first extent of the sequence.
1374 * lastblock Lastblock of first extent of the sequence.
1375 *
1376 * HISTORY
1377 * July 1, 1997 - Andrew E. Mileski
1378 * Written, tested, and released.
1379 */
1380 static noinline int udf_process_sequence(struct super_block *sb, long block,
1381 long lastblock, kernel_lb_addr *fileset)
1382 {
1383 struct buffer_head *bh = NULL;
1384 struct udf_vds_record vds[VDS_POS_LENGTH];
1385 struct udf_vds_record *curr;
1386 struct generic_desc *gd;
1387 struct volDescPtr *vdp;
1388 int done = 0;
1389 uint32_t vdsn;
1390 uint16_t ident;
1391 long next_s = 0, next_e = 0;
1392
1393 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1394
1395 /*
1396 * Read the main descriptor sequence and find which descriptors
1397 * are in it.
1398 */
1399 for (; (!done && block <= lastblock); block++) {
1400
1401 bh = udf_read_tagged(sb, block, block, &ident);
1402 if (!bh) {
1403 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1404 "sequence is corrupted or we could not read "
1405 "it.\n", (unsigned long long)block);
1406 return 1;
1407 }
1408
1409 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1410 gd = (struct generic_desc *)bh->b_data;
1411 vdsn = le32_to_cpu(gd->volDescSeqNum);
1412 switch (ident) {
1413 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1414 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1415 if (vdsn >= curr->volDescSeqNum) {
1416 curr->volDescSeqNum = vdsn;
1417 curr->block = block;
1418 }
1419 break;
1420 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1421 curr = &vds[VDS_POS_VOL_DESC_PTR];
1422 if (vdsn >= curr->volDescSeqNum) {
1423 curr->volDescSeqNum = vdsn;
1424 curr->block = block;
1425
1426 vdp = (struct volDescPtr *)bh->b_data;
1427 next_s = le32_to_cpu(
1428 vdp->nextVolDescSeqExt.extLocation);
1429 next_e = le32_to_cpu(
1430 vdp->nextVolDescSeqExt.extLength);
1431 next_e = next_e >> sb->s_blocksize_bits;
1432 next_e += next_s;
1433 }
1434 break;
1435 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1436 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1437 if (vdsn >= curr->volDescSeqNum) {
1438 curr->volDescSeqNum = vdsn;
1439 curr->block = block;
1440 }
1441 break;
1442 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1443 curr = &vds[VDS_POS_PARTITION_DESC];
1444 if (!curr->block)
1445 curr->block = block;
1446 break;
1447 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1448 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1449 if (vdsn >= curr->volDescSeqNum) {
1450 curr->volDescSeqNum = vdsn;
1451 curr->block = block;
1452 }
1453 break;
1454 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1455 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1456 if (vdsn >= curr->volDescSeqNum) {
1457 curr->volDescSeqNum = vdsn;
1458 curr->block = block;
1459 }
1460 break;
1461 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1462 vds[VDS_POS_TERMINATING_DESC].block = block;
1463 if (next_e) {
1464 block = next_s;
1465 lastblock = next_e;
1466 next_s = next_e = 0;
1467 } else
1468 done = 1;
1469 break;
1470 }
1471 brelse(bh);
1472 }
1473 /*
1474 * Now read interesting descriptors again and process them
1475 * in a suitable order
1476 */
1477 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1478 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1479 return 1;
1480 }
1481 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1482 return 1;
1483
1484 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1485 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1486 return 1;
1487
1488 if (vds[VDS_POS_PARTITION_DESC].block) {
1489 /*
1490 * We rescan the whole descriptor sequence to find
1491 * partition descriptor blocks and process them.
1492 */
1493 for (block = vds[VDS_POS_PARTITION_DESC].block;
1494 block < vds[VDS_POS_TERMINATING_DESC].block;
1495 block++)
1496 if (udf_load_partdesc(sb, block))
1497 return 1;
1498 }
1499
1500 return 0;
1501 }
1502
1503 /*
1504 * udf_check_valid()
1505 */
1506 static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1507 {
1508 long block;
1509 struct udf_sb_info *sbi = UDF_SB(sb);
1510
1511 if (novrs) {
1512 udf_debug("Validity check skipped because of novrs option\n");
1513 return 0;
1514 }
1515 /* Check that it is NSR02 compliant */
1516 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1517 block = udf_vrs(sb, silent);
1518 if (block == -1)
1519 udf_debug("Failed to read byte 32768. Assuming open "
1520 "disc. Skipping validity check\n");
1521 if (block && !sbi->s_last_block)
1522 sbi->s_last_block = udf_get_last_block(sb);
1523 return !block;
1524 }
1525
1526 static int udf_load_sequence(struct super_block *sb, kernel_lb_addr *fileset)
1527 {
1528 struct anchorVolDescPtr *anchor;
1529 uint16_t ident;
1530 struct buffer_head *bh;
1531 long main_s, main_e, reserve_s, reserve_e;
1532 int i;
1533 struct udf_sb_info *sbi;
1534
1535 if (!sb)
1536 return 1;
1537 sbi = UDF_SB(sb);
1538
1539 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
1540 if (!sbi->s_anchor[i])
1541 continue;
1542
1543 bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i],
1544 &ident);
1545 if (!bh)
1546 continue;
1547
1548 anchor = (struct anchorVolDescPtr *)bh->b_data;
1549
1550 /* Locate the main sequence */
1551 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1552 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1553 main_e = main_e >> sb->s_blocksize_bits;
1554 main_e += main_s;
1555
1556 /* Locate the reserve sequence */
1557 reserve_s = le32_to_cpu(
1558 anchor->reserveVolDescSeqExt.extLocation);
1559 reserve_e = le32_to_cpu(
1560 anchor->reserveVolDescSeqExt.extLength);
1561 reserve_e = reserve_e >> sb->s_blocksize_bits;
1562 reserve_e += reserve_s;
1563
1564 brelse(bh);
1565
1566 /* Process the main & reserve sequences */
1567 /* responsible for finding the PartitionDesc(s) */
1568 if (!(udf_process_sequence(sb, main_s, main_e,
1569 fileset) &&
1570 udf_process_sequence(sb, reserve_s, reserve_e,
1571 fileset)))
1572 break;
1573 }
1574
1575 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1576 udf_debug("No Anchor block found\n");
1577 return 1;
1578 }
1579 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1580
1581 return 0;
1582 }
1583
1584 static void udf_open_lvid(struct super_block *sb)
1585 {
1586 struct udf_sb_info *sbi = UDF_SB(sb);
1587 struct buffer_head *bh = sbi->s_lvid_bh;
1588 struct logicalVolIntegrityDesc *lvid;
1589 struct logicalVolIntegrityDescImpUse *lvidiu;
1590 if (!bh)
1591 return;
1592
1593 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1594 lvidiu = udf_sb_lvidiu(sbi);
1595
1596 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1597 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1598 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1599 CURRENT_TIME);
1600 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1601
1602 lvid->descTag.descCRC = cpu_to_le16(
1603 udf_crc((char *)lvid + sizeof(tag),
1604 le16_to_cpu(lvid->descTag.descCRCLength), 0));
1605
1606 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1607 mark_buffer_dirty(bh);
1608 }
1609
1610 static void udf_close_lvid(struct super_block *sb)
1611 {
1612 struct udf_sb_info *sbi = UDF_SB(sb);
1613 struct buffer_head *bh = sbi->s_lvid_bh;
1614 struct logicalVolIntegrityDesc *lvid;
1615 struct logicalVolIntegrityDescImpUse *lvidiu;
1616
1617 if (!bh)
1618 return;
1619
1620 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1621
1622 if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN)
1623 return;
1624
1625 lvidiu = udf_sb_lvidiu(sbi);
1626 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1627 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1628 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1629 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1630 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1631 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1632 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1633 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1634 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1635 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1636
1637 lvid->descTag.descCRC = cpu_to_le16(
1638 udf_crc((char *)lvid + sizeof(tag),
1639 le16_to_cpu(lvid->descTag.descCRCLength),
1640 0));
1641
1642 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1643 mark_buffer_dirty(bh);
1644 }
1645
1646 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1647 {
1648 int i;
1649 int nr_groups = bitmap->s_nr_groups;
1650 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1651 nr_groups);
1652
1653 for (i = 0; i < nr_groups; i++)
1654 if (bitmap->s_block_bitmap[i])
1655 brelse(bitmap->s_block_bitmap[i]);
1656
1657 if (size <= PAGE_SIZE)
1658 kfree(bitmap);
1659 else
1660 vfree(bitmap);
1661 }
1662
1663 static void udf_free_partition(struct udf_part_map *map)
1664 {
1665 int i;
1666
1667 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1668 iput(map->s_uspace.s_table);
1669 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1670 iput(map->s_fspace.s_table);
1671 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1672 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1673 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1674 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1675 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1676 for (i = 0; i < 4; i++)
1677 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1678 }
1679
1680 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1681 {
1682 int i;
1683 struct inode *inode = NULL;
1684 struct udf_options uopt;
1685 kernel_lb_addr rootdir, fileset;
1686 struct udf_sb_info *sbi;
1687
1688 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1689 uopt.uid = -1;
1690 uopt.gid = -1;
1691 uopt.umask = 0;
1692
1693 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1694 if (!sbi)
1695 return -ENOMEM;
1696
1697 sb->s_fs_info = sbi;
1698
1699 mutex_init(&sbi->s_alloc_mutex);
1700
1701 if (!udf_parse_options((char *)options, &uopt, false))
1702 goto error_out;
1703
1704 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1705 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1706 udf_error(sb, "udf_read_super",
1707 "utf8 cannot be combined with iocharset\n");
1708 goto error_out;
1709 }
1710 #ifdef CONFIG_UDF_NLS
1711 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1712 uopt.nls_map = load_nls_default();
1713 if (!uopt.nls_map)
1714 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1715 else
1716 udf_debug("Using default NLS map\n");
1717 }
1718 #endif
1719 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1720 uopt.flags |= (1 << UDF_FLAG_UTF8);
1721
1722 fileset.logicalBlockNum = 0xFFFFFFFF;
1723 fileset.partitionReferenceNum = 0xFFFF;
1724
1725 sbi->s_flags = uopt.flags;
1726 sbi->s_uid = uopt.uid;
1727 sbi->s_gid = uopt.gid;
1728 sbi->s_umask = uopt.umask;
1729 sbi->s_nls_map = uopt.nls_map;
1730
1731 /* Set the block size for all transfers */
1732 if (!sb_min_blocksize(sb, uopt.blocksize)) {
1733 udf_debug("Bad block size (%d)\n", uopt.blocksize);
1734 printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize);
1735 goto error_out;
1736 }
1737
1738 if (uopt.session == 0xFFFFFFFF)
1739 sbi->s_session = udf_get_last_session(sb);
1740 else
1741 sbi->s_session = uopt.session;
1742
1743 udf_debug("Multi-session=%d\n", sbi->s_session);
1744
1745 sbi->s_last_block = uopt.lastblock;
1746 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1747 sbi->s_anchor[2] = uopt.anchor;
1748
1749 if (udf_check_valid(sb, uopt.novrs, silent)) {
1750 /* read volume recognition sequences */
1751 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1752 goto error_out;
1753 }
1754
1755 udf_find_anchor(sb);
1756
1757 /* Fill in the rest of the superblock */
1758 sb->s_op = &udf_sb_ops;
1759 sb->dq_op = NULL;
1760 sb->s_dirt = 0;
1761 sb->s_magic = UDF_SUPER_MAGIC;
1762 sb->s_time_gran = 1000;
1763
1764 if (udf_load_sequence(sb, &fileset)) {
1765 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1766 goto error_out;
1767 }
1768
1769 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1770
1771 if (sbi->s_lvid_bh) {
1772 struct logicalVolIntegrityDescImpUse *lvidiu =
1773 udf_sb_lvidiu(sbi);
1774 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1775 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1776 /* uint16_t maxUDFWriteRev =
1777 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1778
1779 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1780 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1781 "(max is %x)\n",
1782 le16_to_cpu(lvidiu->minUDFReadRev),
1783 UDF_MAX_READ_VERSION);
1784 goto error_out;
1785 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1786 sb->s_flags |= MS_RDONLY;
1787
1788 sbi->s_udfrev = minUDFWriteRev;
1789
1790 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1791 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1792 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1793 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1794 }
1795
1796 if (!sbi->s_partitions) {
1797 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1798 goto error_out;
1799 }
1800
1801 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
1802 UDF_PART_FLAG_READ_ONLY) {
1803 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
1804 "forcing readonly mount\n");
1805 sb->s_flags |= MS_RDONLY;
1806 }
1807
1808 if (udf_find_fileset(sb, &fileset, &rootdir)) {
1809 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1810 goto error_out;
1811 }
1812
1813 if (!silent) {
1814 timestamp ts;
1815 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
1816 udf_info("UDF: Mounting volume '%s', "
1817 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1818 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
1819 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1820 }
1821 if (!(sb->s_flags & MS_RDONLY))
1822 udf_open_lvid(sb);
1823
1824 /* Assign the root inode */
1825 /* assign inodes by physical block number */
1826 /* perhaps it's not extensible enough, but for now ... */
1827 inode = udf_iget(sb, rootdir);
1828 if (!inode) {
1829 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
1830 "partition=%d\n",
1831 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1832 goto error_out;
1833 }
1834
1835 /* Allocate a dentry for the root inode */
1836 sb->s_root = d_alloc_root(inode);
1837 if (!sb->s_root) {
1838 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1839 iput(inode);
1840 goto error_out;
1841 }
1842 sb->s_maxbytes = MAX_LFS_FILESIZE;
1843 return 0;
1844
1845 error_out:
1846 if (sbi->s_vat_inode)
1847 iput(sbi->s_vat_inode);
1848 if (sbi->s_partitions)
1849 for (i = 0; i < sbi->s_partitions; i++)
1850 udf_free_partition(&sbi->s_partmaps[i]);
1851 #ifdef CONFIG_UDF_NLS
1852 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1853 unload_nls(sbi->s_nls_map);
1854 #endif
1855 if (!(sb->s_flags & MS_RDONLY))
1856 udf_close_lvid(sb);
1857 brelse(sbi->s_lvid_bh);
1858
1859 kfree(sbi->s_partmaps);
1860 kfree(sbi);
1861 sb->s_fs_info = NULL;
1862
1863 return -EINVAL;
1864 }
1865
1866 static void udf_error(struct super_block *sb, const char *function,
1867 const char *fmt, ...)
1868 {
1869 va_list args;
1870
1871 if (!(sb->s_flags & MS_RDONLY)) {
1872 /* mark sb error */
1873 sb->s_dirt = 1;
1874 }
1875 va_start(args, fmt);
1876 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1877 va_end(args);
1878 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
1879 sb->s_id, function, error_buf);
1880 }
1881
1882 void udf_warning(struct super_block *sb, const char *function,
1883 const char *fmt, ...)
1884 {
1885 va_list args;
1886
1887 va_start(args, fmt);
1888 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1889 va_end(args);
1890 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
1891 sb->s_id, function, error_buf);
1892 }
1893
1894 static void udf_put_super(struct super_block *sb)
1895 {
1896 int i;
1897 struct udf_sb_info *sbi;
1898
1899 sbi = UDF_SB(sb);
1900 if (sbi->s_vat_inode)
1901 iput(sbi->s_vat_inode);
1902 if (sbi->s_partitions)
1903 for (i = 0; i < sbi->s_partitions; i++)
1904 udf_free_partition(&sbi->s_partmaps[i]);
1905 #ifdef CONFIG_UDF_NLS
1906 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1907 unload_nls(sbi->s_nls_map);
1908 #endif
1909 if (!(sb->s_flags & MS_RDONLY))
1910 udf_close_lvid(sb);
1911 brelse(sbi->s_lvid_bh);
1912 kfree(sbi->s_partmaps);
1913 kfree(sb->s_fs_info);
1914 sb->s_fs_info = NULL;
1915 }
1916
1917 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1918 {
1919 struct super_block *sb = dentry->d_sb;
1920 struct udf_sb_info *sbi = UDF_SB(sb);
1921 struct logicalVolIntegrityDescImpUse *lvidiu;
1922
1923 if (sbi->s_lvid_bh != NULL)
1924 lvidiu = udf_sb_lvidiu(sbi);
1925 else
1926 lvidiu = NULL;
1927
1928 buf->f_type = UDF_SUPER_MAGIC;
1929 buf->f_bsize = sb->s_blocksize;
1930 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1931 buf->f_bfree = udf_count_free(sb);
1932 buf->f_bavail = buf->f_bfree;
1933 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
1934 le32_to_cpu(lvidiu->numDirs)) : 0)
1935 + buf->f_bfree;
1936 buf->f_ffree = buf->f_bfree;
1937 /* __kernel_fsid_t f_fsid */
1938 buf->f_namelen = UDF_NAME_LEN - 2;
1939
1940 return 0;
1941 }
1942
1943 static unsigned int udf_count_free_bitmap(struct super_block *sb,
1944 struct udf_bitmap *bitmap)
1945 {
1946 struct buffer_head *bh = NULL;
1947 unsigned int accum = 0;
1948 int index;
1949 int block = 0, newblock;
1950 kernel_lb_addr loc;
1951 uint32_t bytes;
1952 uint8_t *ptr;
1953 uint16_t ident;
1954 struct spaceBitmapDesc *bm;
1955
1956 lock_kernel();
1957
1958 loc.logicalBlockNum = bitmap->s_extPosition;
1959 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
1960 bh = udf_read_ptagged(sb, loc, 0, &ident);
1961
1962 if (!bh) {
1963 printk(KERN_ERR "udf: udf_count_free failed\n");
1964 goto out;
1965 } else if (ident != TAG_IDENT_SBD) {
1966 brelse(bh);
1967 printk(KERN_ERR "udf: udf_count_free failed\n");
1968 goto out;
1969 }
1970
1971 bm = (struct spaceBitmapDesc *)bh->b_data;
1972 bytes = le32_to_cpu(bm->numOfBytes);
1973 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
1974 ptr = (uint8_t *)bh->b_data;
1975
1976 while (bytes > 0) {
1977 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
1978 accum += bitmap_weight((const unsigned long *)(ptr + index),
1979 cur_bytes * 8);
1980 bytes -= cur_bytes;
1981 if (bytes) {
1982 brelse(bh);
1983 newblock = udf_get_lb_pblock(sb, loc, ++block);
1984 bh = udf_tread(sb, newblock);
1985 if (!bh) {
1986 udf_debug("read failed\n");
1987 goto out;
1988 }
1989 index = 0;
1990 ptr = (uint8_t *)bh->b_data;
1991 }
1992 }
1993 brelse(bh);
1994
1995 out:
1996 unlock_kernel();
1997
1998 return accum;
1999 }
2000
2001 static unsigned int udf_count_free_table(struct super_block *sb,
2002 struct inode *table)
2003 {
2004 unsigned int accum = 0;
2005 uint32_t elen;
2006 kernel_lb_addr eloc;
2007 int8_t etype;
2008 struct extent_position epos;
2009
2010 lock_kernel();
2011
2012 epos.block = UDF_I(table)->i_location;
2013 epos.offset = sizeof(struct unallocSpaceEntry);
2014 epos.bh = NULL;
2015
2016 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2017 accum += (elen >> table->i_sb->s_blocksize_bits);
2018
2019 brelse(epos.bh);
2020
2021 unlock_kernel();
2022
2023 return accum;
2024 }
2025
2026 static unsigned int udf_count_free(struct super_block *sb)
2027 {
2028 unsigned int accum = 0;
2029 struct udf_sb_info *sbi;
2030 struct udf_part_map *map;
2031
2032 sbi = UDF_SB(sb);
2033 if (sbi->s_lvid_bh) {
2034 struct logicalVolIntegrityDesc *lvid =
2035 (struct logicalVolIntegrityDesc *)
2036 sbi->s_lvid_bh->b_data;
2037 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2038 accum = le32_to_cpu(
2039 lvid->freeSpaceTable[sbi->s_partition]);
2040 if (accum == 0xFFFFFFFF)
2041 accum = 0;
2042 }
2043 }
2044
2045 if (accum)
2046 return accum;
2047
2048 map = &sbi->s_partmaps[sbi->s_partition];
2049 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2050 accum += udf_count_free_bitmap(sb,
2051 map->s_uspace.s_bitmap);
2052 }
2053 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2054 accum += udf_count_free_bitmap(sb,
2055 map->s_fspace.s_bitmap);
2056 }
2057 if (accum)
2058 return accum;
2059
2060 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2061 accum += udf_count_free_table(sb,
2062 map->s_uspace.s_table);
2063 }
2064 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2065 accum += udf_count_free_table(sb,
2066 map->s_fspace.s_table);
2067 }
2068
2069 return accum;
2070 }
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