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CommitLineData
1da177e4
LT		 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 *
1da177e4
LT		 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
3a71fc5d
MS		 36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
1da177e4
LT		 38 * 12/20/98 find the free space bitmap (if it exists)
39 */
40
cb00ea35 41#include "udfdecl.h"
1da177e4 42
1da177e4
LT		 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>
1da177e4
LT		 51#include <linux/buffer_head.h>
52#include <linux/vfs.h>
53#include <linux/vmalloc.h>
dc5d39be 54#include <linux/errno.h>
6da80894
MS		 55#include <linux/mount.h>
56#include <linux/seq_file.h>
01b954a3 57#include <linux/bitmap.h>
f845fced 58#include <linux/crc-itu-t.h>
1df2ae31 59#include <linux/log2.h>
1da177e4
LT		 60#include <asm/byteorder.h>
61
1da177e4
LT		 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
6da80894
MS		 77#define UDF_DEFAULT_BLOCKSIZE 2048
78
8de52778
AV		 79enum { UDF_MAX_LINKS = 0xffff };
80
1da177e4
LT		 81/* These are the "meat" - everything else is stuffing */
82static int udf_fill_super(struct super_block *, void *, int);
83static void udf_put_super(struct super_block *);
146bca72 84static int udf_sync_fs(struct super_block *, int);
1da177e4 85static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 86static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 87static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
cb00ea35 89static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 90 struct kernel_lb_addr *);
1da177e4
LT		 91static void udf_open_lvid(struct super_block *);
92static void udf_close_lvid(struct super_block *);
93static unsigned int udf_count_free(struct super_block *);
726c3342 94static int udf_statfs(struct dentry *, struct kstatfs *);
34c80b1d 95static int udf_show_options(struct seq_file *, struct dentry *);
1da177e4 96
69d75671 97struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
6c79e987 98{
69d75671
JK		 99 struct logicalVolIntegrityDesc *lvid;
100 unsigned int partnum;
101 unsigned int offset;
102
103 if (!UDF_SB(sb)->s_lvid_bh)
104 return NULL;
105 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
106 partnum = le32_to_cpu(lvid->numOfPartitions);
107 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
108 offsetof(struct logicalVolIntegrityDesc, impUse)) /
109 (2 * sizeof(uint32_t)) < partnum) {
110 udf_err(sb, "Logical volume integrity descriptor corrupted "
111 "(numOfPartitions = %u)!\n", partnum);
112 return NULL;
113 }
114 /* The offset is to skip freeSpaceTable and sizeTable arrays */
115 offset = partnum * 2 * sizeof(uint32_t);
6c79e987
MS		 116 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
117}
118
1da177e4 119/* UDF filesystem type */
152a0836
AV		 120static struct dentry *udf_mount(struct file_system_type *fs_type,
121 int flags, const char *dev_name, void *data)
1da177e4 122{
152a0836 123 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 124}
125
126static struct file_system_type udf_fstype = {
28de7948
CG		 127 .owner = THIS_MODULE,
128 .name = "udf",
152a0836 129 .mount = udf_mount,
28de7948
CG		 130 .kill_sb = kill_block_super,
131 .fs_flags = FS_REQUIRES_DEV,
1da177e4 132};
3e64fe5b 133MODULE_ALIAS_FS("udf");
1da177e4 134
cb00ea35 135static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 136
137static struct inode *udf_alloc_inode(struct super_block *sb)
138{
139 struct udf_inode_info *ei;
3a71fc5d 140 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 141 if (!ei)
142 return NULL;
95f8797f
DB		 143
144 ei->i_unique = 0;
145 ei->i_lenExtents = 0;
146 ei->i_next_alloc_block = 0;
147 ei->i_next_alloc_goal = 0;
148 ei->i_strat4096 = 0;
4d0fb621 149 init_rwsem(&ei->i_data_sem);
99600051
NJ		 150 ei->cached_extent.lstart = -1;
151 spin_lock_init(&ei->i_extent_cache_lock);
95f8797f 152
1da177e4
LT		 153 return &ei->vfs_inode;
154}
155
fa0d7e3d 156static void udf_i_callback(struct rcu_head *head)
1da177e4 157{
fa0d7e3d 158 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 159 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
160}
161
fa0d7e3d
NP		 162static void udf_destroy_inode(struct inode *inode)
163{
164 call_rcu(&inode->i_rcu, udf_i_callback);
165}
166
51cc5068 167static void init_once(void *foo)
1da177e4 168{
cb00ea35 169 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 170
a35afb83
CL		 171 ei->i_ext.i_data = NULL;
172 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 173}
174
175static int init_inodecache(void)
176{
177 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
178 sizeof(struct udf_inode_info),
cb00ea35
CG		 179 0, (SLAB_RECLAIM_ACCOUNT |
180 SLAB_MEM_SPREAD),
20c2df83 181 init_once);
28de7948 182 if (!udf_inode_cachep)
1da177e4
LT		 183 return -ENOMEM;
184 return 0;
185}
186
187static void destroy_inodecache(void)
188{
8c0a8537
KS		 189 /*
190 * Make sure all delayed rcu free inodes are flushed before we
191 * destroy cache.
192 */
193 rcu_barrier();
1a1d92c1 194 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 195}
196
197/* Superblock operations */
ee9b6d61 198static const struct super_operations udf_sb_ops = {
28de7948
CG		 199 .alloc_inode = udf_alloc_inode,
200 .destroy_inode = udf_destroy_inode,
201 .write_inode = udf_write_inode,
3aac2b62 202 .evict_inode = udf_evict_inode,
28de7948 203 .put_super = udf_put_super,
146bca72 204 .sync_fs = udf_sync_fs,
28de7948
CG		 205 .statfs = udf_statfs,
206 .remount_fs = udf_remount_fs,
6da80894 207 .show_options = udf_show_options,
1da177e4
LT		 208};
209
cb00ea35 210struct udf_options {
1da177e4
LT		 211 unsigned char novrs;
212 unsigned int blocksize;
213 unsigned int session;
214 unsigned int lastblock;
215 unsigned int anchor;
216 unsigned int volume;
217 unsigned short partition;
218 unsigned int fileset;
219 unsigned int rootdir;
220 unsigned int flags;
faa17292 221 umode_t umask;
c2ba138a
EB		 222 kgid_t gid;
223 kuid_t uid;
faa17292
AV		 224 umode_t fmode;
225 umode_t dmode;
1da177e4
LT		 226 struct nls_table *nls_map;
227};
228
229static int __init init_udf_fs(void)
230{
231 int err;
28de7948 232
1da177e4
LT		 233 err = init_inodecache();
234 if (err)
235 goto out1;
236 err = register_filesystem(&udf_fstype);
237 if (err)
238 goto out;
28de7948 239
1da177e4 240 return 0;
28de7948
CG		 241
242out:
1da177e4 243 destroy_inodecache();
28de7948
CG		 244
245out1:
1da177e4
LT		 246 return err;
247}
248
249static void __exit exit_udf_fs(void)
250{
251 unregister_filesystem(&udf_fstype);
252 destroy_inodecache();
253}
254
255module_init(init_udf_fs)
28de7948 256module_exit(exit_udf_fs)
1da177e4 257
dc5d39be
MS		 258static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
259{
260 struct udf_sb_info *sbi = UDF_SB(sb);
261
262 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
263 GFP_KERNEL);
264 if (!sbi->s_partmaps) {
8076c363
JP		 265 udf_err(sb, "Unable to allocate space for %d partition maps\n",
266 count);
dc5d39be
MS		 267 sbi->s_partitions = 0;
268 return -ENOMEM;
269 }
270
271 sbi->s_partitions = count;
272 return 0;
273}
274
bff943af
JK		 275static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
276{
277 int i;
278 int nr_groups = bitmap->s_nr_groups;
279 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
280 nr_groups);
281
282 for (i = 0; i < nr_groups; i++)
283 if (bitmap->s_block_bitmap[i])
284 brelse(bitmap->s_block_bitmap[i]);
285
286 if (size <= PAGE_SIZE)
287 kfree(bitmap);
288 else
289 vfree(bitmap);
290}
291
292static void udf_free_partition(struct udf_part_map *map)
293{
294 int i;
295 struct udf_meta_data *mdata;
296
297 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
298 iput(map->s_uspace.s_table);
299 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
300 iput(map->s_fspace.s_table);
301 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
302 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
303 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
304 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
305 if (map->s_partition_type == UDF_SPARABLE_MAP15)
306 for (i = 0; i < 4; i++)
307 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
308 else if (map->s_partition_type == UDF_METADATA_MAP25) {
309 mdata = &map->s_type_specific.s_metadata;
310 iput(mdata->s_metadata_fe);
311 mdata->s_metadata_fe = NULL;
312
313 iput(mdata->s_mirror_fe);
314 mdata->s_mirror_fe = NULL;
315
316 iput(mdata->s_bitmap_fe);
317 mdata->s_bitmap_fe = NULL;
318 }
319}
320
321static void udf_sb_free_partitions(struct super_block *sb)
322{
323 struct udf_sb_info *sbi = UDF_SB(sb);
324 int i;
1b1baff6
NJ		 325 if (sbi->s_partmaps == NULL)
326 return;
bff943af
JK		 327 for (i = 0; i < sbi->s_partitions; i++)
328 udf_free_partition(&sbi->s_partmaps[i]);
329 kfree(sbi->s_partmaps);
330 sbi->s_partmaps = NULL;
331}
332
34c80b1d 333static int udf_show_options(struct seq_file *seq, struct dentry *root)
6da80894 334{
34c80b1d 335 struct super_block *sb = root->d_sb;
6da80894
MS		 336 struct udf_sb_info *sbi = UDF_SB(sb);
337
338 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
339 seq_puts(seq, ",nostrict");
1197e4df 340 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 341 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
343 seq_puts(seq, ",unhide");
344 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
345 seq_puts(seq, ",undelete");
346 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
347 seq_puts(seq, ",noadinicb");
348 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
349 seq_puts(seq, ",shortad");
350 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
351 seq_puts(seq, ",uid=forget");
352 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
353 seq_puts(seq, ",uid=ignore");
354 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
355 seq_puts(seq, ",gid=forget");
356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
357 seq_puts(seq, ",gid=ignore");
358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
c2ba138a 359 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
6da80894 360 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
c2ba138a 361 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
6da80894 362 if (sbi->s_umask != 0)
faa17292 363 seq_printf(seq, ",umask=%ho", sbi->s_umask);
87bc730c 364 if (sbi->s_fmode != UDF_INVALID_MODE)
faa17292 365 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
87bc730c 366 if (sbi->s_dmode != UDF_INVALID_MODE)
faa17292 367 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
6da80894
MS		 368 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
369 seq_printf(seq, ",session=%u", sbi->s_session);
370 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
371 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 372 if (sbi->s_anchor != 0)
373 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 374 /*
375 * volume, partition, fileset and rootdir seem to be ignored
376 * currently
377 */
378 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
379 seq_puts(seq, ",utf8");
380 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
381 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
382
383 return 0;
384}
385
1da177e4
LT		 386/*
387 * udf_parse_options
388 *
389 * PURPOSE
390 * Parse mount options.
391 *
392 * DESCRIPTION
393 * The following mount options are supported:
394 *
395 * gid= Set the default group.
396 * umask= Set the default umask.
7ac9bcd5
MS		 397 * mode= Set the default file permissions.
398 * dmode= Set the default directory permissions.
1da177e4
LT		 399 * uid= Set the default user.
400 * bs= Set the block size.
401 * unhide Show otherwise hidden files.
402 * undelete Show deleted files in lists.
403 * adinicb Embed data in the inode (default)
404 * noadinicb Don't embed data in the inode
405 * shortad Use short ad's
406 * longad Use long ad's (default)
407 * nostrict Unset strict conformance
408 * iocharset= Set the NLS character set
409 *
410 * The remaining are for debugging and disaster recovery:
411 *
28de7948 412 * novrs Skip volume sequence recognition
1da177e4
LT		 413 *
414 * The following expect a offset from 0.
415 *
416 * session= Set the CDROM session (default= last session)
417 * anchor= Override standard anchor location. (default= 256)
418 * volume= Override the VolumeDesc location. (unused)
419 * partition= Override the PartitionDesc location. (unused)
420 * lastblock= Set the last block of the filesystem/
421 *
422 * The following expect a offset from the partition root.
423 *
424 * fileset= Override the fileset block location. (unused)
425 * rootdir= Override the root directory location. (unused)
426 * WARNING: overriding the rootdir to a non-directory may
427 * yield highly unpredictable results.
428 *
429 * PRE-CONDITIONS
430 * options Pointer to mount options string.
431 * uopts Pointer to mount options variable.
432 *
433 * POST-CONDITIONS
434 * <return> 1 Mount options parsed okay.
435 * <return> 0 Error parsing mount options.
436 *
437 * HISTORY
438 * July 1, 1997 - Andrew E. Mileski
439 * Written, tested, and released.
440 */
28de7948 441
1da177e4
LT		 442enum {
443 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
444 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
445 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
446 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
447 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 448 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
449 Opt_fmode, Opt_dmode
1da177e4
LT		 450};
451
a447c093 452static const match_table_t tokens = {
28de7948
CG		 453 {Opt_novrs, "novrs"},
454 {Opt_nostrict, "nostrict"},
455 {Opt_bs, "bs=%u"},
456 {Opt_unhide, "unhide"},
457 {Opt_undelete, "undelete"},
458 {Opt_noadinicb, "noadinicb"},
459 {Opt_adinicb, "adinicb"},
460 {Opt_shortad, "shortad"},
461 {Opt_longad, "longad"},
462 {Opt_uforget, "uid=forget"},
463 {Opt_uignore, "uid=ignore"},
464 {Opt_gforget, "gid=forget"},
465 {Opt_gignore, "gid=ignore"},
466 {Opt_gid, "gid=%u"},
467 {Opt_uid, "uid=%u"},
468 {Opt_umask, "umask=%o"},
469 {Opt_session, "session=%u"},
470 {Opt_lastblock, "lastblock=%u"},
471 {Opt_anchor, "anchor=%u"},
472 {Opt_volume, "volume=%u"},
473 {Opt_partition, "partition=%u"},
474 {Opt_fileset, "fileset=%u"},
475 {Opt_rootdir, "rootdir=%u"},
476 {Opt_utf8, "utf8"},
477 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 478 {Opt_fmode, "mode=%o"},
479 {Opt_dmode, "dmode=%o"},
28de7948 480 {Opt_err, NULL}
1da177e4
LT		 481};
482
6da80894
MS		 483static int udf_parse_options(char *options, struct udf_options *uopt,
484 bool remount)
1da177e4
LT		 485{
486 char *p;
487 int option;
488
489 uopt->novrs = 0;
1da177e4
LT		 490 uopt->partition = 0xFFFF;
491 uopt->session = 0xFFFFFFFF;
492 uopt->lastblock = 0;
493 uopt->anchor = 0;
494 uopt->volume = 0xFFFFFFFF;
495 uopt->rootdir = 0xFFFFFFFF;
496 uopt->fileset = 0xFFFFFFFF;
497 uopt->nls_map = NULL;
498
499 if (!options)
500 return 1;
501
cb00ea35 502 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 503 substring_t args[MAX_OPT_ARGS];
504 int token;
505 if (!*p)
506 continue;
507
508 token = match_token(p, tokens, args);
cb00ea35
CG		 509 switch (token) {
510 case Opt_novrs:
511 uopt->novrs = 1;
4136801a 512 break;
cb00ea35
CG		 513 case Opt_bs:
514 if (match_int(&args[0], &option))
515 return 0;
516 uopt->blocksize = option;
1197e4df 517 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 518 break;
519 case Opt_unhide:
520 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
521 break;
522 case Opt_undelete:
523 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
524 break;
525 case Opt_noadinicb:
526 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
527 break;
528 case Opt_adinicb:
529 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
530 break;
531 case Opt_shortad:
532 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
533 break;
534 case Opt_longad:
535 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
536 break;
537 case Opt_gid:
538 if (match_int(args, &option))
539 return 0;
c2ba138a
EB		 540 uopt->gid = make_kgid(current_user_ns(), option);
541 if (!gid_valid(uopt->gid))
542 return 0;
ca76d2d8 543 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 544 break;
545 case Opt_uid:
546 if (match_int(args, &option))
547 return 0;
c2ba138a
EB		 548 uopt->uid = make_kuid(current_user_ns(), option);
549 if (!uid_valid(uopt->uid))
550 return 0;
ca76d2d8 551 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 552 break;
553 case Opt_umask:
554 if (match_octal(args, &option))
555 return 0;
556 uopt->umask = option;
557 break;
558 case Opt_nostrict:
559 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
560 break;
561 case Opt_session:
562 if (match_int(args, &option))
563 return 0;
564 uopt->session = option;
6da80894
MS		 565 if (!remount)
566 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 567 break;
568 case Opt_lastblock:
569 if (match_int(args, &option))
570 return 0;
571 uopt->lastblock = option;
6da80894
MS		 572 if (!remount)
573 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 574 break;
575 case Opt_anchor:
576 if (match_int(args, &option))
577 return 0;
578 uopt->anchor = option;
579 break;
580 case Opt_volume:
581 if (match_int(args, &option))
582 return 0;
583 uopt->volume = option;
584 break;
585 case Opt_partition:
586 if (match_int(args, &option))
587 return 0;
588 uopt->partition = option;
589 break;
590 case Opt_fileset:
591 if (match_int(args, &option))
592 return 0;
593 uopt->fileset = option;
594 break;
595 case Opt_rootdir:
596 if (match_int(args, &option))
597 return 0;
598 uopt->rootdir = option;
599 break;
600 case Opt_utf8:
601 uopt->flags |= (1 << UDF_FLAG_UTF8);
602 break;
1da177e4 603#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 604 case Opt_iocharset:
605 uopt->nls_map = load_nls(args[0].from);
606 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
607 break;
1da177e4 608#endif
cb00ea35
CG		 609 case Opt_uignore:
610 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
611 break;
612 case Opt_uforget:
613 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
614 break;
615 case Opt_gignore:
616 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
617 break;
618 case Opt_gforget:
619 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
620 break;
7ac9bcd5
MS		 621 case Opt_fmode:
622 if (match_octal(args, &option))
623 return 0;
624 uopt->fmode = option & 0777;
625 break;
626 case Opt_dmode:
627 if (match_octal(args, &option))
628 return 0;
629 uopt->dmode = option & 0777;
630 break;
cb00ea35 631 default:
78ace70c 632 pr_err("bad mount option \"%s\" or missing value\n", p);
1da177e4
LT		 633 return 0;
634 }
635 }
636 return 1;
637}
638
cb00ea35 639static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 640{
641 struct udf_options uopt;
6c79e987 642 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 643 int error = 0;
69d75671 644 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
1da177e4 645
69d75671
JK		 646 if (lvidiu) {
647 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
e729eac6
JK		 648 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
649 return -EACCES;
650 }
651
6c79e987
MS		 652 uopt.flags = sbi->s_flags;
653 uopt.uid = sbi->s_uid;
654 uopt.gid = sbi->s_gid;
655 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 656 uopt.fmode = sbi->s_fmode;
657 uopt.dmode = sbi->s_dmode;
1da177e4 658
6da80894 659 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 660 return -EINVAL;
661
c03cad24 662 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 663 sbi->s_flags = uopt.flags;
664 sbi->s_uid = uopt.uid;
665 sbi->s_gid = uopt.gid;
666 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 667 sbi->s_fmode = uopt.fmode;
668 sbi->s_dmode = uopt.dmode;
c03cad24 669 write_unlock(&sbi->s_cred_lock);
1da177e4 670
c79d967d
CH		 671 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
672 goto out_unlock;
673
36350462 674 if (*flags & MS_RDONLY)
1da177e4 675 udf_close_lvid(sb);
36350462 676 else
1da177e4
LT		 677 udf_open_lvid(sb);
678
c79d967d 679out_unlock:
c79d967d 680 return error;
1da177e4
LT		 681}
682
40346005
JK		 683/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
684/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
685static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 686{
687 struct volStructDesc *vsd = NULL;
f4bcbbd9 688 loff_t sector = 32768;
1da177e4
LT		 689 int sectorsize;
690 struct buffer_head *bh = NULL;
cb00ea35
CG		 691 int nsr02 = 0;
692 int nsr03 = 0;
6c79e987 693 struct udf_sb_info *sbi;
1da177e4 694
6c79e987 695 sbi = UDF_SB(sb);
1da177e4
LT		 696 if (sb->s_blocksize < sizeof(struct volStructDesc))
697 sectorsize = sizeof(struct volStructDesc);
698 else
699 sectorsize = sb->s_blocksize;
700
6c79e987 701 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 702
703 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 704 (unsigned int)(sector >> sb->s_blocksize_bits),
705 sb->s_blocksize);
1da177e4 706 /* Process the sequence (if applicable) */
cb00ea35 707 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 708 /* Read a block */
709 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
710 if (!bh)
711 break;
712
713 /* Look for ISO descriptors */
714 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 715 (sector & (sb->s_blocksize - 1)));
1da177e4 716
cb00ea35 717 if (vsd->stdIdent[0] == 0) {
3bf25cb4 718 brelse(bh);
1da177e4 719 break;
3a71fc5d
MS		 720 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
721 VSD_STD_ID_LEN)) {
cb00ea35
CG		 722 switch (vsd->structType) {
723 case 0:
724 udf_debug("ISO9660 Boot Record found\n");
725 break;
726 case 1:
a983f368 727 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 728 break;
729 case 2:
a983f368 730 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 731 break;
732 case 3:
a983f368 733 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 734 break;
735 case 255:
a983f368 736 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 737 break;
738 default:
739 udf_debug("ISO9660 VRS (%u) found\n",
740 vsd->structType);
741 break;
1da177e4 742 }
3a71fc5d
MS		 743 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
744 VSD_STD_ID_LEN))
745 ; /* nothing */
746 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
747 VSD_STD_ID_LEN)) {
3bf25cb4 748 brelse(bh);
1da177e4 749 break;
3a71fc5d
MS		 750 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
751 VSD_STD_ID_LEN))
1da177e4 752 nsr02 = sector;
3a71fc5d
MS		 753 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
754 VSD_STD_ID_LEN))
1da177e4 755 nsr03 = sector;
3bf25cb4 756 brelse(bh);
1da177e4
LT		 757 }
758
759 if (nsr03)
760 return nsr03;
761 else if (nsr02)
762 return nsr02;
6c79e987 763 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 764 return -1;
765 else
766 return 0;
767}
768
3a71fc5d 769static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 770 struct kernel_lb_addr *fileset,
771 struct kernel_lb_addr *root)
1da177e4
LT		 772{
773 struct buffer_head *bh = NULL;
774 long lastblock;
775 uint16_t ident;
6c79e987 776 struct udf_sb_info *sbi;
1da177e4
LT		 777
778 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 779 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 780 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 781
28de7948 782 if (!bh) {
1da177e4 783 return 1;
28de7948 784 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 785 brelse(bh);
1da177e4
LT		 786 return 1;
787 }
cb00ea35 788
1da177e4
LT		 789 }
790
6c79e987 791 sbi = UDF_SB(sb);
3a71fc5d
MS		 792 if (!bh) {
793 /* Search backwards through the partitions */
5ca4e4be 794 struct kernel_lb_addr newfileset;
1da177e4 795
28de7948 796/* --> cvg: FIXME - is it reasonable? */
1da177e4 797 return 1;
cb00ea35 798
6c79e987 799 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 800 (newfileset.partitionReferenceNum != 0xFFFF &&
801 fileset->logicalBlockNum == 0xFFFFFFFF &&
802 fileset->partitionReferenceNum == 0xFFFF);
803 newfileset.partitionReferenceNum--) {
6c79e987
MS		 804 lastblock = sbi->s_partmaps
805 [newfileset.partitionReferenceNum]
806 .s_partition_len;
1da177e4
LT		 807 newfileset.logicalBlockNum = 0;
808
cb00ea35 809 do {
97e961fd 810 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 811 &ident);
cb00ea35
CG		 812 if (!bh) {
813 newfileset.logicalBlockNum++;
1da177e4
LT		 814 continue;
815 }
816
cb00ea35
CG		 817 switch (ident) {
818 case TAG_IDENT_SBD:
28de7948
CG		 819 {
820 struct spaceBitmapDesc *sp;
4b11111a
MS		 821 sp = (struct spaceBitmapDesc *)
822 bh->b_data;
28de7948
CG		 823 newfileset.logicalBlockNum += 1 +
824 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 825 sizeof(struct spaceBitmapDesc)
826 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 827 brelse(bh);
828 break;
829 }
cb00ea35 830 case TAG_IDENT_FSD:
28de7948
CG		 831 *fileset = newfileset;
832 break;
cb00ea35 833 default:
28de7948
CG		 834 newfileset.logicalBlockNum++;
835 brelse(bh);
836 bh = NULL;
837 break;
1da177e4 838 }
28de7948
CG		 839 } while (newfileset.logicalBlockNum < lastblock &&
840 fileset->logicalBlockNum == 0xFFFFFFFF &&
841 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 842 }
843 }
844
845 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 846 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 847 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 848 fileset->logicalBlockNum,
849 fileset->partitionReferenceNum);
1da177e4 850
6c79e987 851 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 852 udf_load_fileset(sb, bh, root);
3bf25cb4 853 brelse(bh);
1da177e4
LT		 854 return 0;
855 }
856 return 1;
857}
858
d759bfa4
JK		 859/*
860 * Load primary Volume Descriptor Sequence
861 *
862 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
863 * should be tried.
864 */
c0eb31ed 865static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 866{
867 struct primaryVolDesc *pvoldesc;
ba9aadd8 868 struct ustr *instr, *outstr;
c0eb31ed
JK		 869 struct buffer_head *bh;
870 uint16_t ident;
d759bfa4 871 int ret = -ENOMEM;
ba9aadd8
MS		 872
873 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
874 if (!instr)
d759bfa4 875 return -ENOMEM;
ba9aadd8
MS		 876
877 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
878 if (!outstr)
879 goto out1;
c0eb31ed
JK		 880
881 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 882 if (!bh) {
883 ret = -EAGAIN;
ba9aadd8 884 goto out2;
d759bfa4 885 }
ba9aadd8 886
d759bfa4
JK		 887 if (ident != TAG_IDENT_PVD) {
888 ret = -EIO;
889 goto out_bh;
890 }
1da177e4
LT		 891
892 pvoldesc = (struct primaryVolDesc *)bh->b_data;
893
56774805
MS		 894 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
895 pvoldesc->recordingDateAndTime)) {
af15a298 896#ifdef UDFFS_DEBUG
5ca4e4be 897 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 898 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 899 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
900 ts->minute, le16_to_cpu(ts->typeAndTimezone));
901#endif
1da177e4
LT		 902 }
903
ba9aadd8
MS		 904 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
905 if (udf_CS0toUTF8(outstr, instr)) {
906 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
907 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a 908 udf_debug("volIdent[] = '%s'\n",
a983f368 909 UDF_SB(sb)->s_volume_ident);
1da177e4 910 }
1da177e4 911
ba9aadd8
MS		 912 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
913 if (udf_CS0toUTF8(outstr, instr))
914 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed 915
ba9aadd8 916 ret = 0;
d759bfa4
JK		 917out_bh:
918 brelse(bh);
ba9aadd8
MS		 919out2:
920 kfree(outstr);
921out1:
922 kfree(instr);
923 return ret;
1da177e4
LT		 924}
925
3080a74e
NJ		 926struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
927 u32 meta_file_loc, u32 partition_num)
928{
929 struct kernel_lb_addr addr;
930 struct inode *metadata_fe;
931
932 addr.logicalBlockNum = meta_file_loc;
933 addr.partitionReferenceNum = partition_num;
934
935 metadata_fe = udf_iget(sb, &addr);
936
937 if (metadata_fe == NULL)
938 udf_warn(sb, "metadata inode efe not found\n");
939 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
940 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
941 iput(metadata_fe);
942 metadata_fe = NULL;
943 }
944
945 return metadata_fe;
946}
947
bfb257a5
JK		 948static int udf_load_metadata_files(struct super_block *sb, int partition)
949{
950 struct udf_sb_info *sbi = UDF_SB(sb);
951 struct udf_part_map *map;
952 struct udf_meta_data *mdata;
5ca4e4be 953 struct kernel_lb_addr addr;
bfb257a5
JK		 954
955 map = &sbi->s_partmaps[partition];
956 mdata = &map->s_type_specific.s_metadata;
957
958 /* metadata address */
bfb257a5 959 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 960 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 961
3080a74e
NJ		 962 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
963 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5
JK		 964
965 if (mdata->s_metadata_fe == NULL) {
3080a74e
NJ		 966 /* mirror file entry */
967 udf_debug("Mirror metadata file location: block = %d part = %d\n",
968 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 969
3080a74e
NJ		 970 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
971 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 972
3080a74e
NJ		 973 if (mdata->s_mirror_fe == NULL) {
974 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
d759bfa4 975 return -EIO;
3080a74e 976 }
bfb257a5
JK		 977 }
978
979 /*
980 * bitmap file entry
981 * Note:
982 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
983 */
984 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
985 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
986 addr.partitionReferenceNum = map->s_partition_num;
987
988 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 989 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 990
97e961fd 991 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 992 if (mdata->s_bitmap_fe == NULL) {
993 if (sb->s_flags & MS_RDONLY)
a40ecd7b 994 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 995 else {
8076c363 996 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
d759bfa4 997 return -EIO;
bfb257a5
JK		 998 }
999 }
1000 }
1001
1002 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 1003 return 0;
bfb257a5
JK		 1004}
1005
28de7948 1006static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1007 struct kernel_lb_addr *root)
1da177e4
LT		 1008{
1009 struct fileSetDesc *fset;
1010
1011 fset = (struct fileSetDesc *)bh->b_data;
1012
1013 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1014
6c79e987 1015 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1016
cb00ea35
CG		 1017 udf_debug("Rootdir at block=%d, partition=%d\n",
1018 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1019}
1020
883cb9d1
MS		 1021int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1022{
1023 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1024 return DIV_ROUND_UP(map->s_partition_len +
1025 (sizeof(struct spaceBitmapDesc) << 3),
1026 sb->s_blocksize * 8);
883cb9d1
MS		 1027}
1028
66e1da3f
MS		 1029static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1030{
66e1da3f
MS		 1031 struct udf_bitmap *bitmap;
1032 int nr_groups;
1033 int size;
1034
883cb9d1 1035 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1036 size = sizeof(struct udf_bitmap) +
1037 (sizeof(struct buffer_head *) * nr_groups);
1038
1039 if (size <= PAGE_SIZE)
ed2ae6f6 1040 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1041 else
ed2ae6f6 1042 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1043
75b09e02 1044 if (bitmap == NULL)
66e1da3f 1045 return NULL;
66e1da3f 1046
66e1da3f
MS		 1047 bitmap->s_nr_groups = nr_groups;
1048 return bitmap;
1049}
1050
3fb38dfa
JK		 1051static int udf_fill_partdesc_info(struct super_block *sb,
1052 struct partitionDesc *p, int p_index)
1da177e4 1053{
6c79e987 1054 struct udf_part_map *map;
165923fa 1055 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1056 struct partitionHeaderDesc *phd;
165923fa 1057
3fb38dfa 1058 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1059
1060 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1061 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1062
1063 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1064 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1065 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1066 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1067 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1068 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1069 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1070 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1071
a983f368
JP		 1072 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1073 p_index, map->s_partition_type,
1074 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1075
1076 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1077 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1078 return 0;
165923fa
MS		 1079
1080 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1081 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1082 struct kernel_lb_addr loc = {
165923fa
MS		 1083 .logicalBlockNum = le32_to_cpu(
1084 phd->unallocSpaceTable.extPosition),
3fb38dfa 1085 .partitionReferenceNum = p_index,
165923fa
MS		 1086 };
1087
97e961fd 1088 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1089 if (!map->s_uspace.s_table) {
1090 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1091 p_index);
d759bfa4 1092 return -EIO;
165923fa
MS		 1093 }
1094 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1095 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1096 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1097 }
1098
1099 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1100 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1101 if (!bitmap)
d759bfa4 1102 return -ENOMEM;
165923fa 1103 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1104 bitmap->s_extPosition = le32_to_cpu(
165923fa 1105 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1106 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1107 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1108 p_index, bitmap->s_extPosition);
165923fa
MS		 1109 }
1110
1111 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1112 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1113
1114 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1115 struct kernel_lb_addr loc = {
165923fa
MS		 1116 .logicalBlockNum = le32_to_cpu(
1117 phd->freedSpaceTable.extPosition),
3fb38dfa 1118 .partitionReferenceNum = p_index,
165923fa
MS		 1119 };
1120
97e961fd 1121 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1122 if (!map->s_fspace.s_table) {
3fb38dfa 1123 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1124 p_index);
d759bfa4 1125 return -EIO;
165923fa
MS		 1126 }
1127
1128 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1129 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1130 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1131 }
1132
1133 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1134 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1135 if (!bitmap)
d759bfa4 1136 return -ENOMEM;
165923fa 1137 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1138 bitmap->s_extPosition = le32_to_cpu(
165923fa 1139 phd->freedSpaceBitmap.extPosition);
2e0838fd 1140 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1141 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1142 p_index, bitmap->s_extPosition);
165923fa 1143 }
3fb38dfa
JK		 1144 return 0;
1145}
1146
e971b0b9
JK		 1147static void udf_find_vat_block(struct super_block *sb, int p_index,
1148 int type1_index, sector_t start_block)
38b74a53
JK		 1149{
1150 struct udf_sb_info *sbi = UDF_SB(sb);
1151 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1152 sector_t vat_block;
5ca4e4be 1153 struct kernel_lb_addr ino;
e971b0b9
JK		 1154
1155 /*
1156 * VAT file entry is in the last recorded block. Some broken disks have
1157 * it a few blocks before so try a bit harder...
1158 */
1159 ino.partitionReferenceNum = type1_index;
1160 for (vat_block = start_block;
1161 vat_block >= map->s_partition_root &&
1162 vat_block >= start_block - 3 &&
1163 !sbi->s_vat_inode; vat_block--) {
1164 ino.logicalBlockNum = vat_block - map->s_partition_root;
1165 sbi->s_vat_inode = udf_iget(sb, &ino);
1166 }
1167}
1168
1169static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1170{
1171 struct udf_sb_info *sbi = UDF_SB(sb);
1172 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1173 struct buffer_head *bh = NULL;
1174 struct udf_inode_info *vati;
1175 uint32_t pos;
1176 struct virtualAllocationTable20 *vat20;
4bf17af0 1177 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1178
e971b0b9 1179 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1180 if (!sbi->s_vat_inode &&
1181 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1182 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1183 (unsigned long)sbi->s_last_block,
1184 (unsigned long)blocks - 1);
e971b0b9 1185 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1186 }
38b74a53 1187 if (!sbi->s_vat_inode)
d759bfa4 1188 return -EIO;
38b74a53
JK		 1189
1190 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1191 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1192 map->s_type_specific.s_virtual.s_num_entries =
1193 (sbi->s_vat_inode->i_size - 36) >> 2;
1194 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1195 vati = UDF_I(sbi->s_vat_inode);
1196 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1197 pos = udf_block_map(sbi->s_vat_inode, 0);
1198 bh = sb_bread(sb, pos);
1199 if (!bh)
d759bfa4 1200 return -EIO;
fa5e0815
JK		 1201 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1202 } else {
1203 vat20 = (struct virtualAllocationTable20 *)
1204 vati->i_ext.i_data;
1205 }
38b74a53 1206
38b74a53 1207 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1208 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1209 map->s_type_specific.s_virtual.s_num_entries =
1210 (sbi->s_vat_inode->i_size -
1211 map->s_type_specific.s_virtual.
1212 s_start_offset) >> 2;
1213 brelse(bh);
1214 }
1215 return 0;
1216}
1217
d759bfa4
JK		 1218/*
1219 * Load partition descriptor block
1220 *
1221 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1222 * sequence.
1223 */
3fb38dfa
JK		 1224static int udf_load_partdesc(struct super_block *sb, sector_t block)
1225{
1226 struct buffer_head *bh;
1227 struct partitionDesc *p;
1228 struct udf_part_map *map;
1229 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1230 int i, type1_idx;
3fb38dfa
JK		 1231 uint16_t partitionNumber;
1232 uint16_t ident;
d759bfa4 1233 int ret;
3fb38dfa
JK		 1234
1235 bh = udf_read_tagged(sb, block, block, &ident);
1236 if (!bh)
d759bfa4
JK		 1237 return -EAGAIN;
1238 if (ident != TAG_IDENT_PD) {
1239 ret = 0;
3fb38dfa 1240 goto out_bh;
d759bfa4 1241 }
3fb38dfa
JK		 1242
1243 p = (struct partitionDesc *)bh->b_data;
1244 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1245
bfb257a5 1246 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1247 for (i = 0; i < sbi->s_partitions; i++) {
1248 map = &sbi->s_partmaps[i];
1249 udf_debug("Searching map: (%d == %d)\n",
1250 map->s_partition_num, partitionNumber);
38b74a53
JK		 1251 if (map->s_partition_num == partitionNumber &&
1252 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1253 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1254 break;
1255 }
1256
38b74a53 1257 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1258 udf_debug("Partition (%d) not found in partition map\n",
1259 partitionNumber);
d759bfa4 1260 ret = 0;
3fb38dfa
JK		 1261 goto out_bh;
1262 }
165923fa 1263
3fb38dfa 1264 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1265 if (ret < 0)
1266 goto out_bh;
38b74a53
JK		 1267
1268 /*
bfb257a5
JK		 1269 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1270 * PHYSICAL partitions are already set up
38b74a53
JK		 1271 */
1272 type1_idx = i;
1273 for (i = 0; i < sbi->s_partitions; i++) {
1274 map = &sbi->s_partmaps[i];
1275
1276 if (map->s_partition_num == partitionNumber &&
1277 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1278 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1279 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1280 break;
1281 }
1282
d759bfa4
JK		 1283 if (i >= sbi->s_partitions) {
1284 ret = 0;
38b74a53 1285 goto out_bh;
d759bfa4 1286 }
38b74a53
JK		 1287
1288 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1289 if (ret < 0)
38b74a53
JK		 1290 goto out_bh;
1291
bfb257a5
JK		 1292 if (map->s_partition_type == UDF_METADATA_MAP25) {
1293 ret = udf_load_metadata_files(sb, i);
d759bfa4 1294 if (ret < 0) {
78ace70c
JP		 1295 udf_err(sb, "error loading MetaData partition map %d\n",
1296 i);
bfb257a5
JK		 1297 goto out_bh;
1298 }
1299 } else {
e729eac6
JK		 1300 /*
1301 * If we have a partition with virtual map, we don't handle
1302 * writing to it (we overwrite blocks instead of relocating
1303 * them).
1304 */
1305 if (!(sb->s_flags & MS_RDONLY)) {
1306 ret = -EACCES;
1307 goto out_bh;
1308 }
bfb257a5 1309 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1310 if (ret < 0)
bfb257a5 1311 goto out_bh;
bfb257a5 1312 }
d759bfa4 1313 ret = 0;
c0eb31ed 1314out_bh:
2e0838fd 1315 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1316 brelse(bh);
1317 return ret;
1da177e4
LT		 1318}
1319
1df2ae31
JK		 1320static int udf_load_sparable_map(struct super_block *sb,
1321 struct udf_part_map *map,
1322 struct sparablePartitionMap *spm)
1323{
1324 uint32_t loc;
1325 uint16_t ident;
1326 struct sparingTable *st;
1327 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1328 int i;
1329 struct buffer_head *bh;
1330
1331 map->s_partition_type = UDF_SPARABLE_MAP15;
1332 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1333 if (!is_power_of_2(sdata->s_packet_len)) {
1334 udf_err(sb, "error loading logical volume descriptor: "
1335 "Invalid packet length %u\n",
1336 (unsigned)sdata->s_packet_len);
1337 return -EIO;
1338 }
1339 if (spm->numSparingTables > 4) {
1340 udf_err(sb, "error loading logical volume descriptor: "
1341 "Too many sparing tables (%d)\n",
1342 (int)spm->numSparingTables);
1343 return -EIO;
1344 }
1345
1346 for (i = 0; i < spm->numSparingTables; i++) {
1347 loc = le32_to_cpu(spm->locSparingTable[i]);
1348 bh = udf_read_tagged(sb, loc, loc, &ident);
1349 if (!bh)
1350 continue;
1351
1352 st = (struct sparingTable *)bh->b_data;
1353 if (ident != 0 ||
1354 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1355 strlen(UDF_ID_SPARING)) ||
1356 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1357 sb->s_blocksize) {
1358 brelse(bh);
1359 continue;
1360 }
1361
1362 sdata->s_spar_map[i] = bh;
1363 }
1364 map->s_partition_func = udf_get_pblock_spar15;
1365 return 0;
1366}
1367
c0eb31ed 1368static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1369 struct kernel_lb_addr *fileset)
1da177e4
LT		 1370{
1371 struct logicalVolDesc *lvd;
1df2ae31 1372 int i, offset;
1da177e4 1373 uint8_t type;
6c79e987 1374 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1375 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1376 uint16_t ident;
1377 struct buffer_head *bh;
adee11b2 1378 unsigned int table_len;
d759bfa4 1379 int ret;
1da177e4 1380
c0eb31ed
JK		 1381 bh = udf_read_tagged(sb, block, block, &ident);
1382 if (!bh)
d759bfa4 1383 return -EAGAIN;
c0eb31ed 1384 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1385 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1386 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1387 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1388 udf_err(sb, "error loading logical volume descriptor: "
1389 "Partition table too long (%u > %lu)\n", table_len,
1390 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1391 ret = -EIO;
adee11b2
JK		 1392 goto out_bh;
1393 }
1da177e4 1394
cb14d340
JK		 1395 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1396 if (ret)
c0eb31ed 1397 goto out_bh;
1da177e4 1398
cb00ea35 1399 for (i = 0, offset = 0;
adee11b2 1400 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1401 i++, offset += gpm->partitionMapLength) {
1402 struct udf_part_map *map = &sbi->s_partmaps[i];
1403 gpm = (struct genericPartitionMap *)
1404 &(lvd->partitionMaps[offset]);
1405 type = gpm->partitionMapType;
cb00ea35 1406 if (type == 1) {
4b11111a
MS		 1407 struct genericPartitionMap1 *gpm1 =
1408 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1409 map->s_partition_type = UDF_TYPE1_MAP15;
1410 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1411 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1412 map->s_partition_func = NULL;
cb00ea35 1413 } else if (type == 2) {
4b11111a
MS		 1414 struct udfPartitionMap2 *upm2 =
1415 (struct udfPartitionMap2 *)gpm;
1416 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1417 strlen(UDF_ID_VIRTUAL))) {
1418 u16 suf =
1419 le16_to_cpu(((__le16 *)upm2->partIdent.
1420 identSuffix)[0]);
c82a1275 1421 if (suf < 0x0200) {
4b11111a
MS		 1422 map->s_partition_type =
1423 UDF_VIRTUAL_MAP15;
1424 map->s_partition_func =
1425 udf_get_pblock_virt15;
c82a1275 1426 } else {
4b11111a
MS		 1427 map->s_partition_type =
1428 UDF_VIRTUAL_MAP20;
1429 map->s_partition_func =
1430 udf_get_pblock_virt20;
1da177e4 1431 }
4b11111a
MS		 1432 } else if (!strncmp(upm2->partIdent.ident,
1433 UDF_ID_SPARABLE,
1434 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1435 ret = udf_load_sparable_map(sb, map,
1436 (struct sparablePartitionMap *)gpm);
1437 if (ret < 0)
1df2ae31 1438 goto out_bh;
bfb257a5
JK		 1439 } else if (!strncmp(upm2->partIdent.ident,
1440 UDF_ID_METADATA,
1441 strlen(UDF_ID_METADATA))) {
1442 struct udf_meta_data *mdata =
1443 &map->s_type_specific.s_metadata;
1444 struct metadataPartitionMap *mdm =
1445 (struct metadataPartitionMap *)
1446 &(lvd->partitionMaps[offset]);
a983f368
JP		 1447 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1448 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1449
1450 map->s_partition_type = UDF_METADATA_MAP25;
1451 map->s_partition_func = udf_get_pblock_meta25;
1452
1453 mdata->s_meta_file_loc =
1454 le32_to_cpu(mdm->metadataFileLoc);
1455 mdata->s_mirror_file_loc =
1456 le32_to_cpu(mdm->metadataMirrorFileLoc);
1457 mdata->s_bitmap_file_loc =
1458 le32_to_cpu(mdm->metadataBitmapFileLoc);
1459 mdata->s_alloc_unit_size =
1460 le32_to_cpu(mdm->allocUnitSize);
1461 mdata->s_align_unit_size =
1462 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1463 if (mdm->flags & 0x01)
1464 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1465
1466 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1467 le16_to_cpu(*(__le16 *)
1468 mdm->partIdent.identSuffix));
bfb257a5 1469 udf_debug("Metadata part num=%d\n",
a983f368 1470 le16_to_cpu(mdm->partitionNum));
bfb257a5 1471 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1472 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1473 udf_debug("Metadata file loc=%d\n",
a983f368 1474 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1475 udf_debug("Mirror file loc=%d\n",
a983f368 1476 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1477 udf_debug("Bitmap file loc=%d\n",
a983f368 1478 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1479 udf_debug("Flags: %d %d\n",
1480 mdata->s_flags, mdm->flags);
cb00ea35 1481 } else {
3a71fc5d
MS		 1482 udf_debug("Unknown ident: %s\n",
1483 upm2->partIdent.ident);
1da177e4
LT		 1484 continue;
1485 }
6c79e987
MS		 1486 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1487 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1488 }
1489 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1490 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1491 }
1492
cb00ea35 1493 if (fileset) {
5ca4e4be 1494 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1495
1496 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1497 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1498 fileset->logicalBlockNum,
28de7948 1499 fileset->partitionReferenceNum);
1da177e4
LT		 1500 }
1501 if (lvd->integritySeqExt.extLength)
1502 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1503 ret = 0;
c0eb31ed
JK		 1504out_bh:
1505 brelse(bh);
1506 return ret;
1da177e4
LT		 1507}
1508
1509/*
1510 * udf_load_logicalvolint
1511 *
1512 */
5ca4e4be 1513static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1514{
1515 struct buffer_head *bh = NULL;
1516 uint16_t ident;
6c79e987
MS		 1517 struct udf_sb_info *sbi = UDF_SB(sb);
1518 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1519
1520 while (loc.extLength > 0 &&
cb00ea35
CG		 1521 (bh = udf_read_tagged(sb, loc.extLocation,
1522 loc.extLocation, &ident)) &&
1523 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1524 sbi->s_lvid_bh = bh;
1525 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1526
6c79e987 1527 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1528 udf_load_logicalvolint(sb,
6c79e987 1529 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1530
6c79e987 1531 if (sbi->s_lvid_bh != bh)
3bf25cb4 1532 brelse(bh);
1da177e4 1533 loc.extLength -= sb->s_blocksize;
cb00ea35 1534 loc.extLocation++;
1da177e4 1535 }
6c79e987 1536 if (sbi->s_lvid_bh != bh)
3bf25cb4 1537 brelse(bh);
1da177e4
LT		 1538}
1539
1540/*
d759bfa4
JK		 1541 * Process a main/reserve volume descriptor sequence.
1542 * @block First block of first extent of the sequence.
1543 * @lastblock Lastblock of first extent of the sequence.
1544 * @fileset There we store extent containing root fileset
1da177e4 1545 *
d759bfa4
JK		 1546 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1547 * sequence
1da177e4 1548 */
d759bfa4
JK		 1549static noinline int udf_process_sequence(
1550 struct super_block *sb,
1551 sector_t block, sector_t lastblock,
1552 struct kernel_lb_addr *fileset)
1da177e4
LT		 1553{
1554 struct buffer_head *bh = NULL;
1555 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1556 struct udf_vds_record *curr;
1da177e4
LT		 1557 struct generic_desc *gd;
1558 struct volDescPtr *vdp;
cb00ea35 1559 int done = 0;
1da177e4
LT		 1560 uint32_t vdsn;
1561 uint16_t ident;
1562 long next_s = 0, next_e = 0;
d759bfa4 1563 int ret;
1da177e4
LT		 1564
1565 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1566
c0eb31ed
JK		 1567 /*
1568 * Read the main descriptor sequence and find which descriptors
1569 * are in it.
1570 */
cb00ea35 1571 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1572
1573 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1574 if (!bh) {
78ace70c
JP		 1575 udf_err(sb,
1576 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1577 (unsigned long long)block);
d759bfa4 1578 return -EAGAIN;
c0eb31ed 1579 }
1da177e4
LT		 1580
1581 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1582 gd = (struct generic_desc *)bh->b_data;
1583 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1584 switch (ident) {
28de7948 1585 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1586 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1587 if (vdsn >= curr->volDescSeqNum) {
1588 curr->volDescSeqNum = vdsn;
1589 curr->block = block;
cb00ea35
CG		 1590 }
1591 break;
28de7948 1592 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1593 curr = &vds[VDS_POS_VOL_DESC_PTR];
1594 if (vdsn >= curr->volDescSeqNum) {
1595 curr->volDescSeqNum = vdsn;
1596 curr->block = block;
cb00ea35
CG		 1597
1598 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1599 next_s = le32_to_cpu(
1600 vdp->nextVolDescSeqExt.extLocation);
1601 next_e = le32_to_cpu(
1602 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1603 next_e = next_e >> sb->s_blocksize_bits;
1604 next_e += next_s;
1605 }
1606 break;
28de7948 1607 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1608 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1609 if (vdsn >= curr->volDescSeqNum) {
1610 curr->volDescSeqNum = vdsn;
1611 curr->block = block;
cb00ea35
CG		 1612 }
1613 break;
28de7948 1614 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1615 curr = &vds[VDS_POS_PARTITION_DESC];
1616 if (!curr->block)
1617 curr->block = block;
cb00ea35 1618 break;
28de7948 1619 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1620 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1621 if (vdsn >= curr->volDescSeqNum) {
1622 curr->volDescSeqNum = vdsn;
1623 curr->block = block;
cb00ea35
CG		 1624 }
1625 break;
28de7948 1626 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1627 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1628 if (vdsn >= curr->volDescSeqNum) {
1629 curr->volDescSeqNum = vdsn;
1630 curr->block = block;
cb00ea35
CG		 1631 }
1632 break;
28de7948 1633 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1634 vds[VDS_POS_TERMINATING_DESC].block = block;
1635 if (next_e) {
1636 block = next_s;
1637 lastblock = next_e;
1638 next_s = next_e = 0;
4b11111a 1639 } else
cb00ea35
CG		 1640 done = 1;
1641 break;
1da177e4 1642 }
3bf25cb4 1643 brelse(bh);
1da177e4 1644 }
c0eb31ed
JK		 1645 /*
1646 * Now read interesting descriptors again and process them
1647 * in a suitable order
1648 */
1649 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1650 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1651 return -EAGAIN;
1652 }
1653 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1654 if (ret < 0)
1655 return ret;
1656
1657 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1658 ret = udf_load_logicalvol(sb,
1659 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1660 fileset);
1661 if (ret < 0)
1662 return ret;
c0eb31ed 1663 }
165923fa 1664
c0eb31ed
JK		 1665 if (vds[VDS_POS_PARTITION_DESC].block) {
1666 /*
1667 * We rescan the whole descriptor sequence to find
1668 * partition descriptor blocks and process them.
1669 */
1670 for (block = vds[VDS_POS_PARTITION_DESC].block;
1671 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1672 block++) {
1673 ret = udf_load_partdesc(sb, block);
1674 if (ret < 0)
1675 return ret;
1676 }
1da177e4
LT		 1677 }
1678
1679 return 0;
1680}
1681
d759bfa4
JK		 1682/*
1683 * Load Volume Descriptor Sequence described by anchor in bh
1684 *
1685 * Returns <0 on error, 0 on success
1686 */
40346005
JK		 1687static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1688 struct kernel_lb_addr *fileset)
1da177e4 1689{
40346005 1690 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1691 sector_t main_s, main_e, reserve_s, reserve_e;
1692 int ret;
1da177e4 1693
40346005
JK		 1694 anchor = (struct anchorVolDescPtr *)bh->b_data;
1695
1696 /* Locate the main sequence */
1697 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1698 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1699 main_e = main_e >> sb->s_blocksize_bits;
1700 main_e += main_s;
1701
1702 /* Locate the reserve sequence */
1703 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1704 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1705 reserve_e = reserve_e >> sb->s_blocksize_bits;
1706 reserve_e += reserve_s;
1707
1708 /* Process the main & reserve sequences */
1709 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1710 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1711 if (ret != -EAGAIN)
1712 return ret;
bff943af 1713 udf_sb_free_partitions(sb);
d759bfa4
JK		 1714 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1715 if (ret < 0) {
1716 udf_sb_free_partitions(sb);
1717 /* No sequence was OK, return -EIO */
1718 if (ret == -EAGAIN)
1719 ret = -EIO;
1720 }
1721 return ret;
1da177e4
LT		 1722}
1723
40346005
JK		 1724/*
1725 * Check whether there is an anchor block in the given block and
1726 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1727 *
1728 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1729 * block
40346005
JK		 1730 */
1731static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1732 struct kernel_lb_addr *fileset)
1197e4df 1733{
40346005
JK		 1734 struct buffer_head *bh;
1735 uint16_t ident;
1736 int ret;
1197e4df 1737
40346005
JK		 1738 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1739 udf_fixed_to_variable(block) >=
1740 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1741 return -EAGAIN;
40346005
JK		 1742
1743 bh = udf_read_tagged(sb, block, block, &ident);
1744 if (!bh)
d759bfa4 1745 return -EAGAIN;
40346005
JK		 1746 if (ident != TAG_IDENT_AVDP) {
1747 brelse(bh);
d759bfa4 1748 return -EAGAIN;
1197e4df 1749 }
40346005
JK		 1750 ret = udf_load_sequence(sb, bh, fileset);
1751 brelse(bh);
1752 return ret;
1197e4df
CL		 1753}
1754
d759bfa4
JK		 1755/*
1756 * Search for an anchor volume descriptor pointer.
1757 *
1758 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1759 * of anchors.
1760 */
1761static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1762 struct kernel_lb_addr *fileset)
1da177e4 1763{
40346005 1764 sector_t last[6];
38b74a53 1765 int i;
40346005
JK		 1766 struct udf_sb_info *sbi = UDF_SB(sb);
1767 int last_count = 0;
d759bfa4 1768 int ret;
1da177e4 1769
40346005
JK		 1770 /* First try user provided anchor */
1771 if (sbi->s_anchor) {
d759bfa4
JK		 1772 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1773 if (ret != -EAGAIN)
1774 return ret;
40346005
JK		 1775 }
1776 /*
1777 * according to spec, anchor is in either:
1778 * block 256
1779 * lastblock-256
1780 * lastblock
1781 * however, if the disc isn't closed, it could be 512.
1782 */
d759bfa4
JK		 1783 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1784 if (ret != -EAGAIN)
1785 return ret;
40346005
JK		 1786 /*
1787 * The trouble is which block is the last one. Drives often misreport
1788 * this so we try various possibilities.
1789 */
d759bfa4
JK		 1790 last[last_count++] = *lastblock;
1791 if (*lastblock >= 1)
1792 last[last_count++] = *lastblock - 1;
1793 last[last_count++] = *lastblock + 1;
1794 if (*lastblock >= 2)
1795 last[last_count++] = *lastblock - 2;
1796 if (*lastblock >= 150)
1797 last[last_count++] = *lastblock - 150;
1798 if (*lastblock >= 152)
1799 last[last_count++] = *lastblock - 152;
1da177e4 1800
40346005
JK		 1801 for (i = 0; i < last_count; i++) {
1802 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1803 sb->s_blocksize_bits)
28f7c4d4 1804 continue;
d759bfa4
JK		 1805 ret = udf_check_anchor_block(sb, last[i], fileset);
1806 if (ret != -EAGAIN) {
1807 if (!ret)
1808 *lastblock = last[i];
1809 return ret;
1810 }
40346005 1811 if (last[i] < 256)
28f7c4d4 1812 continue;
d759bfa4
JK		 1813 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1814 if (ret != -EAGAIN) {
1815 if (!ret)
1816 *lastblock = last[i];
1817 return ret;
1818 }
40346005 1819 }
28f7c4d4 1820
40346005 1821 /* Finally try block 512 in case media is open */
d759bfa4 1822 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1823}
28f7c4d4 1824
40346005
JK		 1825/*
1826 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1827 * area specified by it. The function expects sbi->s_lastblock to be the last
1828 * block on the media.
1829 *
d759bfa4
JK		 1830 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1831 * was not found.
40346005
JK		 1832 */
1833static int udf_find_anchor(struct super_block *sb,
1834 struct kernel_lb_addr *fileset)
1835{
40346005 1836 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1837 sector_t lastblock = sbi->s_last_block;
1838 int ret;
28f7c4d4 1839
d759bfa4
JK		 1840 ret = udf_scan_anchors(sb, &lastblock, fileset);
1841 if (ret != -EAGAIN)
40346005 1842 goto out;
1da177e4 1843
40346005
JK		 1844 /* No anchor found? Try VARCONV conversion of block numbers */
1845 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1846 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1847 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1848 ret = udf_scan_anchors(sb, &lastblock, fileset);
1849 if (ret != -EAGAIN)
40346005 1850 goto out;
1da177e4 1851
d759bfa4 1852 lastblock = sbi->s_last_block;
40346005 1853 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1854 ret = udf_scan_anchors(sb, &lastblock, fileset);
1855 if (ret < 0) {
40346005
JK		 1856 /* VARCONV didn't help. Clear it. */
1857 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1858 }
40346005 1859out:
d759bfa4
JK		 1860 if (ret == 0)
1861 sbi->s_last_block = lastblock;
1862 return ret;
40346005 1863}
1da177e4 1864
40346005
JK		 1865/*
1866 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1867 * Descriptor Sequence.
1868 *
1869 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1870 * block was not found.
40346005
JK		 1871 */
1872static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1873 int silent, struct kernel_lb_addr *fileset)
1874{
1875 struct udf_sb_info *sbi = UDF_SB(sb);
1876 loff_t nsr_off;
d759bfa4 1877 int ret;
40346005
JK		 1878
1879 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1880 if (!silent)
78ace70c 1881 udf_warn(sb, "Bad block size\n");
d759bfa4 1882 return -EINVAL;
40346005
JK		 1883 }
1884 sbi->s_last_block = uopt->lastblock;
1885 if (!uopt->novrs) {
1886 /* Check that it is NSR02 compliant */
1887 nsr_off = udf_check_vsd(sb);
1888 if (!nsr_off) {
1889 if (!silent)
78ace70c 1890 udf_warn(sb, "No VRS found\n");
40346005
JK		 1891 return 0;
1892 }
1893 if (nsr_off == -1)
a983f368 1894 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
40346005
JK		 1895 if (!sbi->s_last_block)
1896 sbi->s_last_block = udf_get_last_block(sb);
1897 } else {
1898 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1899 }
1da177e4 1900
40346005
JK		 1901 /* Look for anchor block and load Volume Descriptor Sequence */
1902 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1903 ret = udf_find_anchor(sb, fileset);
1904 if (ret < 0) {
1905 if (!silent && ret == -EAGAIN)
78ace70c 1906 udf_warn(sb, "No anchor found\n");
d759bfa4 1907 return ret;
40346005 1908 }
d759bfa4 1909 return 0;
1da177e4
LT		 1910}
1911
1912static void udf_open_lvid(struct super_block *sb)
1913{
6c79e987
MS		 1914 struct udf_sb_info *sbi = UDF_SB(sb);
1915 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1916 struct logicalVolIntegrityDesc *lvid;
1917 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1918
165923fa
MS		 1919 if (!bh)
1920 return;
165923fa 1921 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
69d75671
JK		 1922 lvidiu = udf_sb_lvidiu(sb);
1923 if (!lvidiu)
1924 return;
165923fa 1925
69d75671 1926 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1927 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1928 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1929 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1930 CURRENT_TIME);
146bca72 1931 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1932
1933 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1934 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1935 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1936
1937 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1938 mark_buffer_dirty(bh);
146bca72 1939 sbi->s_lvid_dirty = 0;
949f4a7c 1940 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1941 /* Make opening of filesystem visible on the media immediately */
1942 sync_dirty_buffer(bh);
1da177e4
LT		 1943}
1944
1945static void udf_close_lvid(struct super_block *sb)
1946{
6c79e987
MS		 1947 struct udf_sb_info *sbi = UDF_SB(sb);
1948 struct buffer_head *bh = sbi->s_lvid_bh;
1949 struct logicalVolIntegrityDesc *lvid;
165923fa 1950 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1951
6c79e987
MS		 1952 if (!bh)
1953 return;
69d75671
JK		 1954 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1955 lvidiu = udf_sb_lvidiu(sb);
1956 if (!lvidiu)
1957 return;
6c79e987 1958
949f4a7c 1959 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1960 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1961 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1962 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1963 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1964 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1965 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1966 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1967 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1968 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1969 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1970
1971 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1972 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1973 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1974
1975 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 1976 /*
1977 * We set buffer uptodate unconditionally here to avoid spurious
1978 * warnings from mark_buffer_dirty() when previous EIO has marked
1979 * the buffer as !uptodate
1980 */
1981 set_buffer_uptodate(bh);
165923fa 1982 mark_buffer_dirty(bh);
146bca72 1983 sbi->s_lvid_dirty = 0;
949f4a7c 1984 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1985 /* Make closing of filesystem visible on the media immediately */
1986 sync_dirty_buffer(bh);
1da177e4
LT		 1987}
1988
d664b6af
JK		 1989u64 lvid_get_unique_id(struct super_block *sb)
1990{
1991 struct buffer_head *bh;
1992 struct udf_sb_info *sbi = UDF_SB(sb);
1993 struct logicalVolIntegrityDesc *lvid;
1994 struct logicalVolHeaderDesc *lvhd;
1995 u64 uniqueID;
1996 u64 ret;
1997
1998 bh = sbi->s_lvid_bh;
1999 if (!bh)
2000 return 0;
2001
2002 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2003 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2004
2005 mutex_lock(&sbi->s_alloc_mutex);
2006 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2007 if (!(++uniqueID & 0xFFFFFFFF))
2008 uniqueID += 16;
2009 lvhd->uniqueID = cpu_to_le64(uniqueID);
2010 mutex_unlock(&sbi->s_alloc_mutex);
2011 mark_buffer_dirty(bh);
2012
2013 return ret;
1da177e4
LT		 2014}
2015
1da177e4
LT		 2016static int udf_fill_super(struct super_block *sb, void *options, int silent)
2017{
d759bfa4 2018 int ret = -EINVAL;
cb00ea35 2019 struct inode *inode = NULL;
1da177e4 2020 struct udf_options uopt;
5ca4e4be 2021 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 2022 struct udf_sb_info *sbi;
2023
2024 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2025 uopt.uid = INVALID_UID;
2026 uopt.gid = INVALID_GID;
1da177e4 2027 uopt.umask = 0;
87bc730c
MS		 2028 uopt.fmode = UDF_INVALID_MODE;
2029 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2030
6c79e987 2031 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2032 if (!sbi)
1da177e4 2033 return -ENOMEM;
28de7948 2034
1da177e4 2035 sb->s_fs_info = sbi;
1da177e4 2036
1e7933de 2037 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2038
6da80894 2039 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 2040 goto error_out;
2041
2042 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2043 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2044 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 2045 goto error_out;
2046 }
2047#ifdef CONFIG_UDF_NLS
cb00ea35 2048 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2049 uopt.nls_map = load_nls_default();
2050 if (!uopt.nls_map)
2051 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2052 else
2053 udf_debug("Using default NLS map\n");
2054 }
2055#endif
2056 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2057 uopt.flags |= (1 << UDF_FLAG_UTF8);
2058
2059 fileset.logicalBlockNum = 0xFFFFFFFF;
2060 fileset.partitionReferenceNum = 0xFFFF;
2061
6c79e987
MS		 2062 sbi->s_flags = uopt.flags;
2063 sbi->s_uid = uopt.uid;
2064 sbi->s_gid = uopt.gid;
2065 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2066 sbi->s_fmode = uopt.fmode;
2067 sbi->s_dmode = uopt.dmode;
6c79e987 2068 sbi->s_nls_map = uopt.nls_map;
c03cad24 2069 rwlock_init(&sbi->s_cred_lock);
1da177e4 2070
cb00ea35 2071 if (uopt.session == 0xFFFFFFFF)
6c79e987 2072 sbi->s_session = udf_get_last_session(sb);
1da177e4 2073 else
6c79e987 2074 sbi->s_session = uopt.session;
1da177e4 2075
6c79e987 2076 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2077
40346005
JK		 2078 /* Fill in the rest of the superblock */
2079 sb->s_op = &udf_sb_ops;
2080 sb->s_export_op = &udf_export_ops;
123e9caf 2081
40346005
JK		 2082 sb->s_magic = UDF_SUPER_MAGIC;
2083 sb->s_time_gran = 1000;
2084
1197e4df 2085 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2086 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2087 } else {
e1defc4f 2088 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2089 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2090 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2091 if (!silent)
78ace70c
JP		 2092 pr_notice("Rescanning with blocksize %d\n",
2093 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2094 brelse(sbi->s_lvid_bh);
2095 sbi->s_lvid_bh = NULL;
1197e4df 2096 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2097 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2098 }
1da177e4 2099 }
d759bfa4
JK		 2100 if (ret < 0) {
2101 if (ret == -EAGAIN) {
2102 udf_warn(sb, "No partition found (1)\n");
2103 ret = -EINVAL;
2104 }
1da177e4
LT		 2105 goto error_out;
2106 }
2107
6c79e987 2108 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2109
6c79e987 2110 if (sbi->s_lvid_bh) {
4b11111a 2111 struct logicalVolIntegrityDescImpUse *lvidiu =
69d75671
JK		 2112 udf_sb_lvidiu(sb);
2113 uint16_t minUDFReadRev;
2114 uint16_t minUDFWriteRev;
1da177e4 2115
69d75671
JK		 2116 if (!lvidiu) {
2117 ret = -EINVAL;
2118 goto error_out;
2119 }
2120 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2121 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
cb00ea35 2122 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c 2123 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
69d75671 2124 minUDFReadRev,
78ace70c 2125 UDF_MAX_READ_VERSION);
d759bfa4 2126 ret = -EINVAL;
1da177e4 2127 goto error_out;
e729eac6
JK		 2128 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2129 !(sb->s_flags & MS_RDONLY)) {
2130 ret = -EACCES;
2131 goto error_out;
2132 }
1da177e4 2133
6c79e987 2134 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2135
2136 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2137 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2138 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2139 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2140 }
2141
6c79e987 2142 if (!sbi->s_partitions) {
78ace70c 2143 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2144 ret = -EINVAL;
1da177e4
LT		 2145 goto error_out;
2146 }
2147
4b11111a 2148 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
e729eac6
JK		 2149 UDF_PART_FLAG_READ_ONLY &&
2150 !(sb->s_flags & MS_RDONLY)) {
2151 ret = -EACCES;
2152 goto error_out;
c1a26e7d 2153 }
39b3f6d6 2154
cb00ea35 2155 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2156 udf_warn(sb, "No fileset found\n");
d759bfa4 2157 ret = -EINVAL;
1da177e4
LT		 2158 goto error_out;
2159 }
2160
cb00ea35 2161 if (!silent) {
5ca4e4be 2162 struct timestamp ts;
56774805 2163 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2164 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2165 sbi->s_volume_ident,
2166 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2167 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2168 }
2169 if (!(sb->s_flags & MS_RDONLY))
2170 udf_open_lvid(sb);
2171
2172 /* Assign the root inode */
2173 /* assign inodes by physical block number */
2174 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2175 inode = udf_iget(sb, &rootdir);
cb00ea35 2176 if (!inode) {
78ace70c 2177 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2178 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
d759bfa4 2179 ret = -EIO;
1da177e4
LT		 2180 goto error_out;
2181 }
2182
2183 /* Allocate a dentry for the root inode */
48fde701 2184 sb->s_root = d_make_root(inode);
cb00ea35 2185 if (!sb->s_root) {
78ace70c 2186 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2187 ret = -ENOMEM;
1da177e4
LT		 2188 goto error_out;
2189 }
31170b6a 2190 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2191 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2192 return 0;
2193
28de7948 2194error_out:
6c79e987
MS		 2195 if (sbi->s_vat_inode)
2196 iput(sbi->s_vat_inode);
1da177e4
LT		 2197#ifdef CONFIG_UDF_NLS
2198 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2199 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2200#endif
2201 if (!(sb->s_flags & MS_RDONLY))
2202 udf_close_lvid(sb);
6c79e987 2203 brelse(sbi->s_lvid_bh);
bff943af 2204 udf_sb_free_partitions(sb);
1da177e4
LT		 2205 kfree(sbi);
2206 sb->s_fs_info = NULL;
28de7948 2207
d759bfa4 2208 return ret;
1da177e4
LT		 2209}
2210
8076c363
JP		 2211void _udf_err(struct super_block *sb, const char *function,
2212 const char *fmt, ...)
1da177e4 2213{
c2bff36c 2214 struct va_format vaf;
1da177e4
LT		 2215 va_list args;
2216
1da177e4 2217 va_start(args, fmt);
c2bff36c
JP		 2218
2219 vaf.fmt = fmt;
2220 vaf.va = &args;
2221
2222 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2223
1da177e4 2224 va_end(args);
1da177e4
LT		 2225}
2226
a40ecd7b
JP		 2227void _udf_warn(struct super_block *sb, const char *function,
2228 const char *fmt, ...)
1da177e4 2229{
c2bff36c 2230 struct va_format vaf;
1da177e4
LT		 2231 va_list args;
2232
cb00ea35 2233 va_start(args, fmt);
c2bff36c
JP		 2234
2235 vaf.fmt = fmt;
2236 vaf.va = &args;
2237
2238 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2239
1da177e4 2240 va_end(args);
1da177e4
LT		 2241}
2242
cb00ea35 2243static void udf_put_super(struct super_block *sb)
1da177e4 2244{
6c79e987 2245 struct udf_sb_info *sbi;
1da177e4 2246
6c79e987 2247 sbi = UDF_SB(sb);
6cfd0148 2248
6c79e987
MS		 2249 if (sbi->s_vat_inode)
2250 iput(sbi->s_vat_inode);
1da177e4
LT		 2251#ifdef CONFIG_UDF_NLS
2252 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2253 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2254#endif
2255 if (!(sb->s_flags & MS_RDONLY))
2256 udf_close_lvid(sb);
6c79e987 2257 brelse(sbi->s_lvid_bh);
bff943af 2258 udf_sb_free_partitions(sb);
1da177e4
LT		 2259 kfree(sb->s_fs_info);
2260 sb->s_fs_info = NULL;
2261}
2262
146bca72
JK		 2263static int udf_sync_fs(struct super_block *sb, int wait)
2264{
2265 struct udf_sb_info *sbi = UDF_SB(sb);
2266
2267 mutex_lock(&sbi->s_alloc_mutex);
2268 if (sbi->s_lvid_dirty) {
2269 /*
2270 * Blockdevice will be synced later so we don't have to submit
2271 * the buffer for IO
2272 */
2273 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2274 sbi->s_lvid_dirty = 0;
2275 }
2276 mutex_unlock(&sbi->s_alloc_mutex);
2277
2278 return 0;
2279}
2280
cb00ea35 2281static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2282{
726c3342 2283 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2284 struct udf_sb_info *sbi = UDF_SB(sb);
2285 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2286 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987 2287
69d75671 2288 lvidiu = udf_sb_lvidiu(sb);
1da177e4
LT		 2289 buf->f_type = UDF_SUPER_MAGIC;
2290 buf->f_bsize = sb->s_blocksize;
6c79e987 2291 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2292 buf->f_bfree = udf_count_free(sb);
2293 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2294 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2295 le32_to_cpu(lvidiu->numDirs)) : 0)
2296 + buf->f_bfree;
1da177e4 2297 buf->f_ffree = buf->f_bfree;
cb00ea35 2298 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2299 buf->f_fsid.val[0] = (u32)id;
2300 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2301
2302 return 0;
2303}
2304
4b11111a
MS		 2305static unsigned int udf_count_free_bitmap(struct super_block *sb,
2306 struct udf_bitmap *bitmap)
1da177e4
LT		 2307{
2308 struct buffer_head *bh = NULL;
2309 unsigned int accum = 0;
2310 int index;
2311 int block = 0, newblock;
5ca4e4be 2312 struct kernel_lb_addr loc;
1da177e4 2313 uint32_t bytes;
1da177e4
LT		 2314 uint8_t *ptr;
2315 uint16_t ident;
2316 struct spaceBitmapDesc *bm;
2317
1da177e4 2318 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2319 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2320 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2321
cb00ea35 2322 if (!bh) {
78ace70c 2323 udf_err(sb, "udf_count_free failed\n");
1da177e4 2324 goto out;
cb00ea35 2325 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2326 brelse(bh);
78ace70c 2327 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2328 goto out;
2329 }
2330
2331 bm = (struct spaceBitmapDesc *)bh->b_data;
2332 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2333 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2334 ptr = (uint8_t *)bh->b_data;
1da177e4 2335
cb00ea35 2336 while (bytes > 0) {
01b954a3
MS		 2337 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2338 accum += bitmap_weight((const unsigned long *)(ptr + index),
2339 cur_bytes * 8);
2340 bytes -= cur_bytes;
cb00ea35 2341 if (bytes) {
3bf25cb4 2342 brelse(bh);
97e961fd 2343 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2344 bh = udf_tread(sb, newblock);
cb00ea35 2345 if (!bh) {
1da177e4
LT		 2346 udf_debug("read failed\n");
2347 goto out;
2348 }
2349 index = 0;
28de7948 2350 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2351 }
2352 }
3bf25cb4 2353 brelse(bh);
28de7948 2354out:
1da177e4
LT		 2355 return accum;
2356}
2357
4b11111a
MS		 2358static unsigned int udf_count_free_table(struct super_block *sb,
2359 struct inode *table)
1da177e4
LT		 2360{
2361 unsigned int accum = 0;
ff116fc8 2362 uint32_t elen;
5ca4e4be 2363 struct kernel_lb_addr eloc;
1da177e4 2364 int8_t etype;
ff116fc8 2365 struct extent_position epos;
1da177e4 2366
d1668fe3 2367 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2368 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2369 epos.offset = sizeof(struct unallocSpaceEntry);
2370 epos.bh = NULL;
1da177e4 2371
3a71fc5d 2372 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2373 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2374
3bf25cb4 2375 brelse(epos.bh);
d1668fe3 2376 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2377
2378 return accum;
2379}
cb00ea35
CG		 2380
2381static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2382{
2383 unsigned int accum = 0;
6c79e987
MS		 2384 struct udf_sb_info *sbi;
2385 struct udf_part_map *map;
1da177e4 2386
6c79e987
MS		 2387 sbi = UDF_SB(sb);
2388 if (sbi->s_lvid_bh) {
4b11111a
MS		 2389 struct logicalVolIntegrityDesc *lvid =
2390 (struct logicalVolIntegrityDesc *)
2391 sbi->s_lvid_bh->b_data;
6c79e987 2392 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2393 accum = le32_to_cpu(
2394 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2395 if (accum == 0xFFFFFFFF)
2396 accum = 0;
2397 }
2398 }
2399
2400 if (accum)
2401 return accum;
2402
6c79e987
MS		 2403 map = &sbi->s_partmaps[sbi->s_partition];
2404 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2405 accum += udf_count_free_bitmap(sb,
6c79e987 2406 map->s_uspace.s_bitmap);
1da177e4 2407 }
6c79e987 2408 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2409 accum += udf_count_free_bitmap(sb,
6c79e987 2410 map->s_fspace.s_bitmap);
1da177e4
LT		 2411 }
2412 if (accum)
2413 return accum;
2414
6c79e987 2415 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2416 accum += udf_count_free_table(sb,
6c79e987 2417 map->s_uspace.s_table);
1da177e4 2418 }
6c79e987 2419 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2420 accum += udf_count_free_table(sb,
6c79e987 2421 map->s_fspace.s_table);
1da177e4
LT		 2422 }
2423
2424 return accum;
2425}
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