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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/vfs.h>
52#include <linux/vmalloc.h>
dc5d39be 53#include <linux/errno.h>
6da80894
MS		 54#include <linux/mount.h>
55#include <linux/seq_file.h>
01b954a3 56#include <linux/bitmap.h>
f845fced 57#include <linux/crc-itu-t.h>
1df2ae31 58#include <linux/log2.h>
1da177e4
LT		 59#include <asm/byteorder.h>
60
1da177e4
LT		 61#include "udf_sb.h"
62#include "udf_i.h"
63
64#include <linux/init.h>
e973606c 65#include <linux/uaccess.h>
1da177e4
LT		 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
6da80894
MS		 76#define UDF_DEFAULT_BLOCKSIZE 2048
77
44499602
PF		 78#define VSD_FIRST_SECTOR_OFFSET 32768
79#define VSD_MAX_SECTOR_OFFSET 0x800000
80
8de52778
AV		 81enum { UDF_MAX_LINKS = 0xffff };
82
1da177e4
LT		 83/* These are the "meat" - everything else is stuffing */
84static int udf_fill_super(struct super_block *, void *, int);
85static void udf_put_super(struct super_block *);
146bca72 86static int udf_sync_fs(struct super_block *, int);
1da177e4 87static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 88static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 89static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
90 struct kernel_lb_addr *);
cb00ea35 91static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 92 struct kernel_lb_addr *);
1da177e4
LT		 93static void udf_open_lvid(struct super_block *);
94static void udf_close_lvid(struct super_block *);
95static unsigned int udf_count_free(struct super_block *);
726c3342 96static int udf_statfs(struct dentry *, struct kstatfs *);
34c80b1d 97static int udf_show_options(struct seq_file *, struct dentry *);
1da177e4 98
69d75671 99struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
6c79e987 100{
69d75671
JK		 101 struct logicalVolIntegrityDesc *lvid;
102 unsigned int partnum;
103 unsigned int offset;
104
105 if (!UDF_SB(sb)->s_lvid_bh)
106 return NULL;
107 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
108 partnum = le32_to_cpu(lvid->numOfPartitions);
109 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
110 offsetof(struct logicalVolIntegrityDesc, impUse)) /
111 (2 * sizeof(uint32_t)) < partnum) {
112 udf_err(sb, "Logical volume integrity descriptor corrupted "
113 "(numOfPartitions = %u)!\n", partnum);
114 return NULL;
115 }
116 /* The offset is to skip freeSpaceTable and sizeTable arrays */
117 offset = partnum * 2 * sizeof(uint32_t);
6c79e987
MS		 118 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
119}
120
1da177e4 121/* UDF filesystem type */
152a0836
AV		 122static struct dentry *udf_mount(struct file_system_type *fs_type,
123 int flags, const char *dev_name, void *data)
1da177e4 124{
152a0836 125 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 126}
127
128static struct file_system_type udf_fstype = {
28de7948
CG		 129 .owner = THIS_MODULE,
130 .name = "udf",
152a0836 131 .mount = udf_mount,
28de7948
CG		 132 .kill_sb = kill_block_super,
133 .fs_flags = FS_REQUIRES_DEV,
1da177e4 134};
3e64fe5b 135MODULE_ALIAS_FS("udf");
1da177e4 136
cb00ea35 137static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 138
139static struct inode *udf_alloc_inode(struct super_block *sb)
140{
141 struct udf_inode_info *ei;
3a71fc5d 142 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 143 if (!ei)
144 return NULL;
95f8797f
DB		 145
146 ei->i_unique = 0;
147 ei->i_lenExtents = 0;
148 ei->i_next_alloc_block = 0;
149 ei->i_next_alloc_goal = 0;
150 ei->i_strat4096 = 0;
4d0fb621 151 init_rwsem(&ei->i_data_sem);
99600051
NJ		 152 ei->cached_extent.lstart = -1;
153 spin_lock_init(&ei->i_extent_cache_lock);
95f8797f 154
1da177e4
LT		 155 return &ei->vfs_inode;
156}
157
fa0d7e3d 158static void udf_i_callback(struct rcu_head *head)
1da177e4 159{
fa0d7e3d 160 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 161 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
162}
163
fa0d7e3d
NP		 164static void udf_destroy_inode(struct inode *inode)
165{
166 call_rcu(&inode->i_rcu, udf_i_callback);
167}
168
51cc5068 169static void init_once(void *foo)
1da177e4 170{
cb00ea35 171 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 172
a35afb83
CL		 173 ei->i_ext.i_data = NULL;
174 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 175}
176
53ea18de 177static int __init init_inodecache(void)
1da177e4
LT		 178{
179 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
180 sizeof(struct udf_inode_info),
cb00ea35 181 0, (SLAB_RECLAIM_ACCOUNT |
5d097056
VD		 182 SLAB_MEM_SPREAD |
183 SLAB_ACCOUNT),
20c2df83 184 init_once);
28de7948 185 if (!udf_inode_cachep)
1da177e4
LT		 186 return -ENOMEM;
187 return 0;
188}
189
190static void destroy_inodecache(void)
191{
8c0a8537
KS		 192 /*
193 * Make sure all delayed rcu free inodes are flushed before we
194 * destroy cache.
195 */
196 rcu_barrier();
1a1d92c1 197 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 198}
199
200/* Superblock operations */
ee9b6d61 201static const struct super_operations udf_sb_ops = {
28de7948
CG		 202 .alloc_inode = udf_alloc_inode,
203 .destroy_inode = udf_destroy_inode,
204 .write_inode = udf_write_inode,
3aac2b62 205 .evict_inode = udf_evict_inode,
28de7948 206 .put_super = udf_put_super,
146bca72 207 .sync_fs = udf_sync_fs,
28de7948
CG		 208 .statfs = udf_statfs,
209 .remount_fs = udf_remount_fs,
6da80894 210 .show_options = udf_show_options,
1da177e4
LT		 211};
212
cb00ea35 213struct udf_options {
1da177e4
LT		 214 unsigned char novrs;
215 unsigned int blocksize;
216 unsigned int session;
217 unsigned int lastblock;
218 unsigned int anchor;
219 unsigned int volume;
220 unsigned short partition;
221 unsigned int fileset;
222 unsigned int rootdir;
223 unsigned int flags;
faa17292 224 umode_t umask;
c2ba138a
EB		 225 kgid_t gid;
226 kuid_t uid;
faa17292
AV		 227 umode_t fmode;
228 umode_t dmode;
1da177e4
LT		 229 struct nls_table *nls_map;
230};
231
232static int __init init_udf_fs(void)
233{
234 int err;
28de7948 235
1da177e4
LT		 236 err = init_inodecache();
237 if (err)
238 goto out1;
239 err = register_filesystem(&udf_fstype);
240 if (err)
241 goto out;
28de7948 242
1da177e4 243 return 0;
28de7948
CG		 244
245out:
1da177e4 246 destroy_inodecache();
28de7948
CG		 247
248out1:
1da177e4
LT		 249 return err;
250}
251
252static void __exit exit_udf_fs(void)
253{
254 unregister_filesystem(&udf_fstype);
255 destroy_inodecache();
256}
257
258module_init(init_udf_fs)
28de7948 259module_exit(exit_udf_fs)
1da177e4 260
dc5d39be
MS		 261static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
262{
263 struct udf_sb_info *sbi = UDF_SB(sb);
264
265 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
266 GFP_KERNEL);
267 if (!sbi->s_partmaps) {
8076c363
JP		 268 udf_err(sb, "Unable to allocate space for %d partition maps\n",
269 count);
dc5d39be
MS		 270 sbi->s_partitions = 0;
271 return -ENOMEM;
272 }
273
274 sbi->s_partitions = count;
275 return 0;
276}
277
bff943af
JK		 278static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
279{
280 int i;
281 int nr_groups = bitmap->s_nr_groups;
bff943af
JK		 282
283 for (i = 0; i < nr_groups; i++)
284 if (bitmap->s_block_bitmap[i])
285 brelse(bitmap->s_block_bitmap[i]);
286
1d5cfdb0 287 kvfree(bitmap);
bff943af
JK		 288}
289
290static void udf_free_partition(struct udf_part_map *map)
291{
292 int i;
293 struct udf_meta_data *mdata;
294
295 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
296 iput(map->s_uspace.s_table);
297 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
298 iput(map->s_fspace.s_table);
299 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
300 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
301 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
302 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
303 if (map->s_partition_type == UDF_SPARABLE_MAP15)
304 for (i = 0; i < 4; i++)
305 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
306 else if (map->s_partition_type == UDF_METADATA_MAP25) {
307 mdata = &map->s_type_specific.s_metadata;
308 iput(mdata->s_metadata_fe);
309 mdata->s_metadata_fe = NULL;
310
311 iput(mdata->s_mirror_fe);
312 mdata->s_mirror_fe = NULL;
313
314 iput(mdata->s_bitmap_fe);
315 mdata->s_bitmap_fe = NULL;
316 }
317}
318
319static void udf_sb_free_partitions(struct super_block *sb)
320{
321 struct udf_sb_info *sbi = UDF_SB(sb);
322 int i;
1b1baff6
NJ		 323 if (sbi->s_partmaps == NULL)
324 return;
bff943af
JK		 325 for (i = 0; i < sbi->s_partitions; i++)
326 udf_free_partition(&sbi->s_partmaps[i]);
327 kfree(sbi->s_partmaps);
328 sbi->s_partmaps = NULL;
329}
330
34c80b1d 331static int udf_show_options(struct seq_file *seq, struct dentry *root)
6da80894 332{
34c80b1d 333 struct super_block *sb = root->d_sb;
6da80894
MS		 334 struct udf_sb_info *sbi = UDF_SB(sb);
335
336 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
337 seq_puts(seq, ",nostrict");
1197e4df 338 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 339 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
340 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
341 seq_puts(seq, ",unhide");
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
343 seq_puts(seq, ",undelete");
344 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
345 seq_puts(seq, ",noadinicb");
346 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
347 seq_puts(seq, ",shortad");
348 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
349 seq_puts(seq, ",uid=forget");
350 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
351 seq_puts(seq, ",uid=ignore");
352 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
353 seq_puts(seq, ",gid=forget");
354 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
355 seq_puts(seq, ",gid=ignore");
356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
c2ba138a 357 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
6da80894 358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
c2ba138a 359 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
6da80894 360 if (sbi->s_umask != 0)
faa17292 361 seq_printf(seq, ",umask=%ho", sbi->s_umask);
87bc730c 362 if (sbi->s_fmode != UDF_INVALID_MODE)
faa17292 363 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
87bc730c 364 if (sbi->s_dmode != UDF_INVALID_MODE)
faa17292 365 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
6da80894
MS		 366 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
367 seq_printf(seq, ",session=%u", sbi->s_session);
368 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
369 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 370 if (sbi->s_anchor != 0)
371 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 372 /*
373 * volume, partition, fileset and rootdir seem to be ignored
374 * currently
375 */
376 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
377 seq_puts(seq, ",utf8");
378 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
379 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
380
381 return 0;
382}
383
1da177e4
LT		 384/*
385 * udf_parse_options
386 *
387 * PURPOSE
388 * Parse mount options.
389 *
390 * DESCRIPTION
391 * The following mount options are supported:
392 *
393 * gid= Set the default group.
394 * umask= Set the default umask.
7ac9bcd5
MS		 395 * mode= Set the default file permissions.
396 * dmode= Set the default directory permissions.
1da177e4
LT		 397 * uid= Set the default user.
398 * bs= Set the block size.
399 * unhide Show otherwise hidden files.
400 * undelete Show deleted files in lists.
401 * adinicb Embed data in the inode (default)
402 * noadinicb Don't embed data in the inode
403 * shortad Use short ad's
404 * longad Use long ad's (default)
405 * nostrict Unset strict conformance
406 * iocharset= Set the NLS character set
407 *
408 * The remaining are for debugging and disaster recovery:
409 *
28de7948 410 * novrs Skip volume sequence recognition
1da177e4
LT		 411 *
412 * The following expect a offset from 0.
413 *
414 * session= Set the CDROM session (default= last session)
415 * anchor= Override standard anchor location. (default= 256)
416 * volume= Override the VolumeDesc location. (unused)
417 * partition= Override the PartitionDesc location. (unused)
418 * lastblock= Set the last block of the filesystem/
419 *
420 * The following expect a offset from the partition root.
421 *
422 * fileset= Override the fileset block location. (unused)
423 * rootdir= Override the root directory location. (unused)
424 * WARNING: overriding the rootdir to a non-directory may
425 * yield highly unpredictable results.
426 *
427 * PRE-CONDITIONS
428 * options Pointer to mount options string.
429 * uopts Pointer to mount options variable.
430 *
431 * POST-CONDITIONS
432 * <return> 1 Mount options parsed okay.
433 * <return> 0 Error parsing mount options.
434 *
435 * HISTORY
436 * July 1, 1997 - Andrew E. Mileski
437 * Written, tested, and released.
438 */
28de7948 439
1da177e4
LT		 440enum {
441 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
442 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
443 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
444 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
445 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 446 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
447 Opt_fmode, Opt_dmode
1da177e4
LT		 448};
449
a447c093 450static const match_table_t tokens = {
28de7948
CG		 451 {Opt_novrs, "novrs"},
452 {Opt_nostrict, "nostrict"},
453 {Opt_bs, "bs=%u"},
454 {Opt_unhide, "unhide"},
455 {Opt_undelete, "undelete"},
456 {Opt_noadinicb, "noadinicb"},
457 {Opt_adinicb, "adinicb"},
458 {Opt_shortad, "shortad"},
459 {Opt_longad, "longad"},
460 {Opt_uforget, "uid=forget"},
461 {Opt_uignore, "uid=ignore"},
462 {Opt_gforget, "gid=forget"},
463 {Opt_gignore, "gid=ignore"},
464 {Opt_gid, "gid=%u"},
465 {Opt_uid, "uid=%u"},
466 {Opt_umask, "umask=%o"},
467 {Opt_session, "session=%u"},
468 {Opt_lastblock, "lastblock=%u"},
469 {Opt_anchor, "anchor=%u"},
470 {Opt_volume, "volume=%u"},
471 {Opt_partition, "partition=%u"},
472 {Opt_fileset, "fileset=%u"},
473 {Opt_rootdir, "rootdir=%u"},
474 {Opt_utf8, "utf8"},
475 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 476 {Opt_fmode, "mode=%o"},
477 {Opt_dmode, "dmode=%o"},
28de7948 478 {Opt_err, NULL}
1da177e4
LT		 479};
480
6da80894
MS		 481static int udf_parse_options(char *options, struct udf_options *uopt,
482 bool remount)
1da177e4
LT		 483{
484 char *p;
485 int option;
486
487 uopt->novrs = 0;
1da177e4
LT		 488 uopt->partition = 0xFFFF;
489 uopt->session = 0xFFFFFFFF;
490 uopt->lastblock = 0;
491 uopt->anchor = 0;
492 uopt->volume = 0xFFFFFFFF;
493 uopt->rootdir = 0xFFFFFFFF;
494 uopt->fileset = 0xFFFFFFFF;
495 uopt->nls_map = NULL;
496
497 if (!options)
498 return 1;
499
cb00ea35 500 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 501 substring_t args[MAX_OPT_ARGS];
502 int token;
8c6915ae 503 unsigned n;
1da177e4
LT		 504 if (!*p)
505 continue;
506
507 token = match_token(p, tokens, args);
cb00ea35
CG		 508 switch (token) {
509 case Opt_novrs:
510 uopt->novrs = 1;
4136801a 511 break;
cb00ea35
CG		 512 case Opt_bs:
513 if (match_int(&args[0], &option))
514 return 0;
8c6915ae
FF		 515 n = option;
516 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
517 return 0;
518 uopt->blocksize = n;
1197e4df 519 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 520 break;
521 case Opt_unhide:
522 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
523 break;
524 case Opt_undelete:
525 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
526 break;
527 case Opt_noadinicb:
528 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
529 break;
530 case Opt_adinicb:
531 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
532 break;
533 case Opt_shortad:
534 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
535 break;
536 case Opt_longad:
537 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
538 break;
539 case Opt_gid:
540 if (match_int(args, &option))
541 return 0;
c2ba138a
EB		 542 uopt->gid = make_kgid(current_user_ns(), option);
543 if (!gid_valid(uopt->gid))
544 return 0;
ca76d2d8 545 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 546 break;
547 case Opt_uid:
548 if (match_int(args, &option))
549 return 0;
c2ba138a
EB		 550 uopt->uid = make_kuid(current_user_ns(), option);
551 if (!uid_valid(uopt->uid))
552 return 0;
ca76d2d8 553 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 554 break;
555 case Opt_umask:
556 if (match_octal(args, &option))
557 return 0;
558 uopt->umask = option;
559 break;
560 case Opt_nostrict:
561 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
562 break;
563 case Opt_session:
564 if (match_int(args, &option))
565 return 0;
566 uopt->session = option;
6da80894
MS		 567 if (!remount)
568 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 569 break;
570 case Opt_lastblock:
571 if (match_int(args, &option))
572 return 0;
573 uopt->lastblock = option;
6da80894
MS		 574 if (!remount)
575 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 576 break;
577 case Opt_anchor:
578 if (match_int(args, &option))
579 return 0;
580 uopt->anchor = option;
581 break;
582 case Opt_volume:
583 if (match_int(args, &option))
584 return 0;
585 uopt->volume = option;
586 break;
587 case Opt_partition:
588 if (match_int(args, &option))
589 return 0;
590 uopt->partition = option;
591 break;
592 case Opt_fileset:
593 if (match_int(args, &option))
594 return 0;
595 uopt->fileset = option;
596 break;
597 case Opt_rootdir:
598 if (match_int(args, &option))
599 return 0;
600 uopt->rootdir = option;
601 break;
602 case Opt_utf8:
603 uopt->flags |= (1 << UDF_FLAG_UTF8);
604 break;
1da177e4 605#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 606 case Opt_iocharset:
607 uopt->nls_map = load_nls(args[0].from);
608 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
609 break;
1da177e4 610#endif
cb00ea35
CG		 611 case Opt_uignore:
612 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
613 break;
614 case Opt_uforget:
615 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
616 break;
617 case Opt_gignore:
618 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
619 break;
620 case Opt_gforget:
621 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
622 break;
7ac9bcd5
MS		 623 case Opt_fmode:
624 if (match_octal(args, &option))
625 return 0;
626 uopt->fmode = option & 0777;
627 break;
628 case Opt_dmode:
629 if (match_octal(args, &option))
630 return 0;
631 uopt->dmode = option & 0777;
632 break;
cb00ea35 633 default:
78ace70c 634 pr_err("bad mount option \"%s\" or missing value\n", p);
1da177e4
LT		 635 return 0;
636 }
637 }
638 return 1;
639}
640
cb00ea35 641static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 642{
643 struct udf_options uopt;
6c79e987 644 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 645 int error = 0;
69d75671 646 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
1da177e4 647
02b9984d 648 sync_filesystem(sb);
69d75671
JK		 649 if (lvidiu) {
650 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
e729eac6
JK		 651 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
652 return -EACCES;
653 }
654
6c79e987
MS		 655 uopt.flags = sbi->s_flags;
656 uopt.uid = sbi->s_uid;
657 uopt.gid = sbi->s_gid;
658 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 659 uopt.fmode = sbi->s_fmode;
660 uopt.dmode = sbi->s_dmode;
1da177e4 661
6da80894 662 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 663 return -EINVAL;
664
c03cad24 665 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 666 sbi->s_flags = uopt.flags;
667 sbi->s_uid = uopt.uid;
668 sbi->s_gid = uopt.gid;
669 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 670 sbi->s_fmode = uopt.fmode;
671 sbi->s_dmode = uopt.dmode;
c03cad24 672 write_unlock(&sbi->s_cred_lock);
1da177e4 673
c79d967d
CH		 674 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
675 goto out_unlock;
676
36350462 677 if (*flags & MS_RDONLY)
1da177e4 678 udf_close_lvid(sb);
36350462 679 else
1da177e4
LT		 680 udf_open_lvid(sb);
681
c79d967d 682out_unlock:
c79d967d 683 return error;
1da177e4
LT		 684}
685
40346005
JK		 686/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
687/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
688static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 689{
690 struct volStructDesc *vsd = NULL;
44499602 691 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
1da177e4
LT		 692 int sectorsize;
693 struct buffer_head *bh = NULL;
cb00ea35
CG		 694 int nsr02 = 0;
695 int nsr03 = 0;
6c79e987 696 struct udf_sb_info *sbi;
1da177e4 697
6c79e987 698 sbi = UDF_SB(sb);
1da177e4
LT		 699 if (sb->s_blocksize < sizeof(struct volStructDesc))
700 sectorsize = sizeof(struct volStructDesc);
701 else
702 sectorsize = sb->s_blocksize;
703
6c79e987 704 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 705
706 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 707 (unsigned int)(sector >> sb->s_blocksize_bits),
708 sb->s_blocksize);
44499602
PF		 709 /* Process the sequence (if applicable). The hard limit on the sector
710 * offset is arbitrary, hopefully large enough so that all valid UDF
711 * filesystems will be recognised. There is no mention of an upper
712 * bound to the size of the volume recognition area in the standard.
713 * The limit will prevent the code to read all the sectors of a
714 * specially crafted image (like a bluray disc full of CD001 sectors),
715 * potentially causing minutes or even hours of uninterruptible I/O
716 * activity. This actually happened with uninitialised SSD partitions
717 * (all 0xFF) before the check for the limit and all valid IDs were
718 * added */
719 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
720 sector += sectorsize) {
1da177e4
LT		 721 /* Read a block */
722 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
723 if (!bh)
724 break;
725
726 /* Look for ISO descriptors */
727 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 728 (sector & (sb->s_blocksize - 1)));
1da177e4 729
44499602 730 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
3a71fc5d 731 VSD_STD_ID_LEN)) {
cb00ea35
CG		 732 switch (vsd->structType) {
733 case 0:
734 udf_debug("ISO9660 Boot Record found\n");
735 break;
736 case 1:
a983f368 737 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 738 break;
739 case 2:
a983f368 740 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 741 break;
742 case 3:
a983f368 743 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 744 break;
745 case 255:
a983f368 746 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 747 break;
748 default:
749 udf_debug("ISO9660 VRS (%u) found\n",
750 vsd->structType);
751 break;
1da177e4 752 }
3a71fc5d
MS		 753 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
754 VSD_STD_ID_LEN))
755 ; /* nothing */
756 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
757 VSD_STD_ID_LEN)) {
3bf25cb4 758 brelse(bh);
1da177e4 759 break;
3a71fc5d
MS		 760 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
761 VSD_STD_ID_LEN))
1da177e4 762 nsr02 = sector;
3a71fc5d
MS		 763 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
764 VSD_STD_ID_LEN))
1da177e4 765 nsr03 = sector;
44499602
PF		 766 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
767 VSD_STD_ID_LEN))
768 ; /* nothing */
769 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
770 VSD_STD_ID_LEN))
771 ; /* nothing */
772 else {
773 /* invalid id : end of volume recognition area */
774 brelse(bh);
775 break;
776 }
3bf25cb4 777 brelse(bh);
1da177e4
LT		 778 }
779
780 if (nsr03)
781 return nsr03;
782 else if (nsr02)
783 return nsr02;
44499602
PF		 784 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
785 VSD_FIRST_SECTOR_OFFSET)
1da177e4
LT		 786 return -1;
787 else
788 return 0;
789}
790
3a71fc5d 791static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 792 struct kernel_lb_addr *fileset,
793 struct kernel_lb_addr *root)
1da177e4
LT		 794{
795 struct buffer_head *bh = NULL;
796 long lastblock;
797 uint16_t ident;
6c79e987 798 struct udf_sb_info *sbi;
1da177e4
LT		 799
800 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 801 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 802 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 803
28de7948 804 if (!bh) {
1da177e4 805 return 1;
28de7948 806 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 807 brelse(bh);
1da177e4
LT		 808 return 1;
809 }
cb00ea35 810
1da177e4
LT		 811 }
812
6c79e987 813 sbi = UDF_SB(sb);
3a71fc5d
MS		 814 if (!bh) {
815 /* Search backwards through the partitions */
5ca4e4be 816 struct kernel_lb_addr newfileset;
1da177e4 817
28de7948 818/* --> cvg: FIXME - is it reasonable? */
1da177e4 819 return 1;
cb00ea35 820
6c79e987 821 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 822 (newfileset.partitionReferenceNum != 0xFFFF &&
823 fileset->logicalBlockNum == 0xFFFFFFFF &&
824 fileset->partitionReferenceNum == 0xFFFF);
825 newfileset.partitionReferenceNum--) {
6c79e987
MS		 826 lastblock = sbi->s_partmaps
827 [newfileset.partitionReferenceNum]
828 .s_partition_len;
1da177e4
LT		 829 newfileset.logicalBlockNum = 0;
830
cb00ea35 831 do {
97e961fd 832 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 833 &ident);
cb00ea35
CG		 834 if (!bh) {
835 newfileset.logicalBlockNum++;
1da177e4
LT		 836 continue;
837 }
838
cb00ea35
CG		 839 switch (ident) {
840 case TAG_IDENT_SBD:
28de7948
CG		 841 {
842 struct spaceBitmapDesc *sp;
4b11111a
MS		 843 sp = (struct spaceBitmapDesc *)
844 bh->b_data;
28de7948
CG		 845 newfileset.logicalBlockNum += 1 +
846 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 847 sizeof(struct spaceBitmapDesc)
848 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 849 brelse(bh);
850 break;
851 }
cb00ea35 852 case TAG_IDENT_FSD:
28de7948
CG		 853 *fileset = newfileset;
854 break;
cb00ea35 855 default:
28de7948
CG		 856 newfileset.logicalBlockNum++;
857 brelse(bh);
858 bh = NULL;
859 break;
1da177e4 860 }
28de7948
CG		 861 } while (newfileset.logicalBlockNum < lastblock &&
862 fileset->logicalBlockNum == 0xFFFFFFFF &&
863 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 864 }
865 }
866
867 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 868 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 869 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 870 fileset->logicalBlockNum,
871 fileset->partitionReferenceNum);
1da177e4 872
6c79e987 873 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 874 udf_load_fileset(sb, bh, root);
3bf25cb4 875 brelse(bh);
1da177e4
LT		 876 return 0;
877 }
878 return 1;
879}
880
d759bfa4
JK		 881/*
882 * Load primary Volume Descriptor Sequence
883 *
884 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
885 * should be tried.
886 */
c0eb31ed 887static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 888{
889 struct primaryVolDesc *pvoldesc;
ba9aadd8 890 struct ustr *instr, *outstr;
c0eb31ed
JK		 891 struct buffer_head *bh;
892 uint16_t ident;
d759bfa4 893 int ret = -ENOMEM;
ba9aadd8
MS		 894
895 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
896 if (!instr)
d759bfa4 897 return -ENOMEM;
ba9aadd8
MS		 898
899 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
900 if (!outstr)
901 goto out1;
c0eb31ed
JK		 902
903 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 904 if (!bh) {
905 ret = -EAGAIN;
ba9aadd8 906 goto out2;
d759bfa4 907 }
ba9aadd8 908
d759bfa4
JK		 909 if (ident != TAG_IDENT_PVD) {
910 ret = -EIO;
911 goto out_bh;
912 }
1da177e4
LT		 913
914 pvoldesc = (struct primaryVolDesc *)bh->b_data;
915
56774805
MS		 916 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
917 pvoldesc->recordingDateAndTime)) {
af15a298 918#ifdef UDFFS_DEBUG
5ca4e4be 919 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 920 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 921 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
922 ts->minute, le16_to_cpu(ts->typeAndTimezone));
923#endif
1da177e4
LT		 924 }
925
e9d4cf41
FF		 926 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) {
927 ret = udf_CS0toUTF8(outstr, instr);
928 if (ret < 0)
929 goto out_bh;
930
931 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
932 outstr->u_len > 31 ? 31 : outstr->u_len);
933 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
934 }
1da177e4 935
792352cb 936 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) {
e9d4cf41
FF		 937 ret = udf_CS0toUTF8(outstr, instr);
938 if (ret < 0)
939 goto out_bh;
940
941 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
792352cb 942 }
c0eb31ed 943
ba9aadd8 944 ret = 0;
d759bfa4
JK		 945out_bh:
946 brelse(bh);
ba9aadd8
MS		 947out2:
948 kfree(outstr);
949out1:
950 kfree(instr);
951 return ret;
1da177e4
LT		 952}
953
3080a74e
NJ		 954struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
955 u32 meta_file_loc, u32 partition_num)
956{
957 struct kernel_lb_addr addr;
958 struct inode *metadata_fe;
959
960 addr.logicalBlockNum = meta_file_loc;
961 addr.partitionReferenceNum = partition_num;
962
6174c2eb 963 metadata_fe = udf_iget_special(sb, &addr);
3080a74e 964
6d3d5e86 965 if (IS_ERR(metadata_fe)) {
3080a74e 966 udf_warn(sb, "metadata inode efe not found\n");
6d3d5e86
JK		 967 return metadata_fe;
968 }
969 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
3080a74e
NJ		 970 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
971 iput(metadata_fe);
6d3d5e86 972 return ERR_PTR(-EIO);
3080a74e
NJ		 973 }
974
975 return metadata_fe;
976}
977
bfb257a5
JK		 978static int udf_load_metadata_files(struct super_block *sb, int partition)
979{
980 struct udf_sb_info *sbi = UDF_SB(sb);
981 struct udf_part_map *map;
982 struct udf_meta_data *mdata;
5ca4e4be 983 struct kernel_lb_addr addr;
6d3d5e86 984 struct inode *fe;
bfb257a5
JK		 985
986 map = &sbi->s_partmaps[partition];
987 mdata = &map->s_type_specific.s_metadata;
988
989 /* metadata address */
bfb257a5 990 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 991 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 992
6d3d5e86
JK		 993 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
994 map->s_partition_num);
995 if (IS_ERR(fe)) {
3080a74e
NJ		 996 /* mirror file entry */
997 udf_debug("Mirror metadata file location: block = %d part = %d\n",
998 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 999
6d3d5e86
JK		 1000 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
1001 map->s_partition_num);
bfb257a5 1002
6d3d5e86 1003 if (IS_ERR(fe)) {
3080a74e 1004 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
6d3d5e86 1005 return PTR_ERR(fe);
3080a74e 1006 }
6d3d5e86
JK		 1007 mdata->s_mirror_fe = fe;
1008 } else
1009 mdata->s_metadata_fe = fe;
1010
bfb257a5
JK		 1011
1012 /*
1013 * bitmap file entry
1014 * Note:
1015 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1016 */
1017 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1018 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1019 addr.partitionReferenceNum = map->s_partition_num;
1020
1021 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 1022 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 1023
6174c2eb 1024 fe = udf_iget_special(sb, &addr);
6d3d5e86 1025 if (IS_ERR(fe)) {
bfb257a5 1026 if (sb->s_flags & MS_RDONLY)
a40ecd7b 1027 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 1028 else {
8076c363 1029 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
6d3d5e86 1030 return PTR_ERR(fe);
bfb257a5 1031 }
6d3d5e86
JK		 1032 } else
1033 mdata->s_bitmap_fe = fe;
bfb257a5
JK		 1034 }
1035
1036 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 1037 return 0;
bfb257a5
JK		 1038}
1039
28de7948 1040static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1041 struct kernel_lb_addr *root)
1da177e4
LT		 1042{
1043 struct fileSetDesc *fset;
1044
1045 fset = (struct fileSetDesc *)bh->b_data;
1046
1047 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1048
6c79e987 1049 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1050
cb00ea35
CG		 1051 udf_debug("Rootdir at block=%d, partition=%d\n",
1052 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1053}
1054
883cb9d1
MS		 1055int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1056{
1057 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1058 return DIV_ROUND_UP(map->s_partition_len +
1059 (sizeof(struct spaceBitmapDesc) << 3),
1060 sb->s_blocksize * 8);
883cb9d1
MS		 1061}
1062
66e1da3f
MS		 1063static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1064{
66e1da3f
MS		 1065 struct udf_bitmap *bitmap;
1066 int nr_groups;
1067 int size;
1068
883cb9d1 1069 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1070 size = sizeof(struct udf_bitmap) +
1071 (sizeof(struct buffer_head *) * nr_groups);
1072
1073 if (size <= PAGE_SIZE)
ed2ae6f6 1074 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1075 else
ed2ae6f6 1076 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1077
75b09e02 1078 if (bitmap == NULL)
66e1da3f 1079 return NULL;
66e1da3f 1080
66e1da3f
MS		 1081 bitmap->s_nr_groups = nr_groups;
1082 return bitmap;
1083}
1084
3fb38dfa
JK		 1085static int udf_fill_partdesc_info(struct super_block *sb,
1086 struct partitionDesc *p, int p_index)
1da177e4 1087{
6c79e987 1088 struct udf_part_map *map;
165923fa 1089 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1090 struct partitionHeaderDesc *phd;
165923fa 1091
3fb38dfa 1092 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1093
1094 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1095 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1096
1097 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1098 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1099 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1100 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1101 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1102 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1103 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1104 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1105
a983f368
JP		 1106 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1107 p_index, map->s_partition_type,
1108 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1109
1110 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1111 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1112 return 0;
165923fa
MS		 1113
1114 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1115 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1116 struct kernel_lb_addr loc = {
165923fa
MS		 1117 .logicalBlockNum = le32_to_cpu(
1118 phd->unallocSpaceTable.extPosition),
3fb38dfa 1119 .partitionReferenceNum = p_index,
165923fa 1120 };
6d3d5e86 1121 struct inode *inode;
165923fa 1122
6174c2eb 1123 inode = udf_iget_special(sb, &loc);
6d3d5e86 1124 if (IS_ERR(inode)) {
165923fa 1125 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1126 p_index);
6d3d5e86 1127 return PTR_ERR(inode);
165923fa 1128 }
6d3d5e86 1129 map->s_uspace.s_table = inode;
165923fa
MS		 1130 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1131 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1132 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1133 }
1134
1135 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1136 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1137 if (!bitmap)
d759bfa4 1138 return -ENOMEM;
165923fa 1139 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1140 bitmap->s_extPosition = le32_to_cpu(
165923fa 1141 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1142 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1143 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1144 p_index, bitmap->s_extPosition);
165923fa
MS		 1145 }
1146
1147 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1148 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1149
1150 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1151 struct kernel_lb_addr loc = {
165923fa
MS		 1152 .logicalBlockNum = le32_to_cpu(
1153 phd->freedSpaceTable.extPosition),
3fb38dfa 1154 .partitionReferenceNum = p_index,
165923fa 1155 };
6d3d5e86 1156 struct inode *inode;
165923fa 1157
6174c2eb 1158 inode = udf_iget_special(sb, &loc);
6d3d5e86 1159 if (IS_ERR(inode)) {
3fb38dfa 1160 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1161 p_index);
6d3d5e86 1162 return PTR_ERR(inode);
165923fa 1163 }
6d3d5e86 1164 map->s_fspace.s_table = inode;
165923fa
MS		 1165 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1166 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1167 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1168 }
1169
1170 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1171 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1172 if (!bitmap)
d759bfa4 1173 return -ENOMEM;
165923fa 1174 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1175 bitmap->s_extPosition = le32_to_cpu(
165923fa 1176 phd->freedSpaceBitmap.extPosition);
2e0838fd 1177 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1178 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1179 p_index, bitmap->s_extPosition);
165923fa 1180 }
3fb38dfa
JK		 1181 return 0;
1182}
1183
e971b0b9
JK		 1184static void udf_find_vat_block(struct super_block *sb, int p_index,
1185 int type1_index, sector_t start_block)
38b74a53
JK		 1186{
1187 struct udf_sb_info *sbi = UDF_SB(sb);
1188 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1189 sector_t vat_block;
5ca4e4be 1190 struct kernel_lb_addr ino;
6d3d5e86 1191 struct inode *inode;
e971b0b9
JK		 1192
1193 /*
1194 * VAT file entry is in the last recorded block. Some broken disks have
1195 * it a few blocks before so try a bit harder...
1196 */
1197 ino.partitionReferenceNum = type1_index;
1198 for (vat_block = start_block;
1199 vat_block >= map->s_partition_root &&
6d3d5e86 1200 vat_block >= start_block - 3; vat_block--) {
e971b0b9 1201 ino.logicalBlockNum = vat_block - map->s_partition_root;
6174c2eb 1202 inode = udf_iget_special(sb, &ino);
6d3d5e86
JK		 1203 if (!IS_ERR(inode)) {
1204 sbi->s_vat_inode = inode;
1205 break;
1206 }
e971b0b9
JK		 1207 }
1208}
1209
1210static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1211{
1212 struct udf_sb_info *sbi = UDF_SB(sb);
1213 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1214 struct buffer_head *bh = NULL;
1215 struct udf_inode_info *vati;
1216 uint32_t pos;
1217 struct virtualAllocationTable20 *vat20;
4bf17af0 1218 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1219
e971b0b9 1220 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1221 if (!sbi->s_vat_inode &&
1222 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1223 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1224 (unsigned long)sbi->s_last_block,
1225 (unsigned long)blocks - 1);
e971b0b9 1226 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1227 }
38b74a53 1228 if (!sbi->s_vat_inode)
d759bfa4 1229 return -EIO;
38b74a53
JK		 1230
1231 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1232 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1233 map->s_type_specific.s_virtual.s_num_entries =
1234 (sbi->s_vat_inode->i_size - 36) >> 2;
1235 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1236 vati = UDF_I(sbi->s_vat_inode);
1237 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1238 pos = udf_block_map(sbi->s_vat_inode, 0);
1239 bh = sb_bread(sb, pos);
1240 if (!bh)
d759bfa4 1241 return -EIO;
fa5e0815
JK		 1242 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1243 } else {
1244 vat20 = (struct virtualAllocationTable20 *)
1245 vati->i_ext.i_data;
1246 }
38b74a53 1247
38b74a53 1248 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1249 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1250 map->s_type_specific.s_virtual.s_num_entries =
1251 (sbi->s_vat_inode->i_size -
1252 map->s_type_specific.s_virtual.
1253 s_start_offset) >> 2;
1254 brelse(bh);
1255 }
1256 return 0;
1257}
1258
d759bfa4
JK		 1259/*
1260 * Load partition descriptor block
1261 *
1262 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1263 * sequence.
1264 */
3fb38dfa
JK		 1265static int udf_load_partdesc(struct super_block *sb, sector_t block)
1266{
1267 struct buffer_head *bh;
1268 struct partitionDesc *p;
1269 struct udf_part_map *map;
1270 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1271 int i, type1_idx;
3fb38dfa
JK		 1272 uint16_t partitionNumber;
1273 uint16_t ident;
d759bfa4 1274 int ret;
3fb38dfa
JK		 1275
1276 bh = udf_read_tagged(sb, block, block, &ident);
1277 if (!bh)
d759bfa4
JK		 1278 return -EAGAIN;
1279 if (ident != TAG_IDENT_PD) {
1280 ret = 0;
3fb38dfa 1281 goto out_bh;
d759bfa4 1282 }
3fb38dfa
JK		 1283
1284 p = (struct partitionDesc *)bh->b_data;
1285 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1286
bfb257a5 1287 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1288 for (i = 0; i < sbi->s_partitions; i++) {
1289 map = &sbi->s_partmaps[i];
1290 udf_debug("Searching map: (%d == %d)\n",
1291 map->s_partition_num, partitionNumber);
38b74a53
JK		 1292 if (map->s_partition_num == partitionNumber &&
1293 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1294 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1295 break;
1296 }
1297
38b74a53 1298 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1299 udf_debug("Partition (%d) not found in partition map\n",
1300 partitionNumber);
d759bfa4 1301 ret = 0;
3fb38dfa
JK		 1302 goto out_bh;
1303 }
165923fa 1304
3fb38dfa 1305 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1306 if (ret < 0)
1307 goto out_bh;
38b74a53
JK		 1308
1309 /*
bfb257a5
JK		 1310 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1311 * PHYSICAL partitions are already set up
38b74a53
JK		 1312 */
1313 type1_idx = i;
44499602
PF		 1314#ifdef UDFFS_DEBUG
1315 map = NULL; /* supress 'maybe used uninitialized' warning */
1316#endif
38b74a53
JK		 1317 for (i = 0; i < sbi->s_partitions; i++) {
1318 map = &sbi->s_partmaps[i];
1319
1320 if (map->s_partition_num == partitionNumber &&
1321 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1322 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1323 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1324 break;
1325 }
1326
d759bfa4
JK		 1327 if (i >= sbi->s_partitions) {
1328 ret = 0;
38b74a53 1329 goto out_bh;
d759bfa4 1330 }
38b74a53
JK		 1331
1332 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1333 if (ret < 0)
38b74a53
JK		 1334 goto out_bh;
1335
bfb257a5
JK		 1336 if (map->s_partition_type == UDF_METADATA_MAP25) {
1337 ret = udf_load_metadata_files(sb, i);
d759bfa4 1338 if (ret < 0) {
78ace70c
JP		 1339 udf_err(sb, "error loading MetaData partition map %d\n",
1340 i);
bfb257a5
JK		 1341 goto out_bh;
1342 }
1343 } else {
e729eac6
JK		 1344 /*
1345 * If we have a partition with virtual map, we don't handle
1346 * writing to it (we overwrite blocks instead of relocating
1347 * them).
1348 */
1349 if (!(sb->s_flags & MS_RDONLY)) {
1350 ret = -EACCES;
1351 goto out_bh;
1352 }
bfb257a5 1353 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1354 if (ret < 0)
bfb257a5 1355 goto out_bh;
bfb257a5 1356 }
d759bfa4 1357 ret = 0;
c0eb31ed 1358out_bh:
2e0838fd 1359 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1360 brelse(bh);
1361 return ret;
1da177e4
LT		 1362}
1363
1df2ae31
JK		 1364static int udf_load_sparable_map(struct super_block *sb,
1365 struct udf_part_map *map,
1366 struct sparablePartitionMap *spm)
1367{
1368 uint32_t loc;
1369 uint16_t ident;
1370 struct sparingTable *st;
1371 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1372 int i;
1373 struct buffer_head *bh;
1374
1375 map->s_partition_type = UDF_SPARABLE_MAP15;
1376 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1377 if (!is_power_of_2(sdata->s_packet_len)) {
1378 udf_err(sb, "error loading logical volume descriptor: "
1379 "Invalid packet length %u\n",
1380 (unsigned)sdata->s_packet_len);
1381 return -EIO;
1382 }
1383 if (spm->numSparingTables > 4) {
1384 udf_err(sb, "error loading logical volume descriptor: "
1385 "Too many sparing tables (%d)\n",
1386 (int)spm->numSparingTables);
1387 return -EIO;
1388 }
1389
1390 for (i = 0; i < spm->numSparingTables; i++) {
1391 loc = le32_to_cpu(spm->locSparingTable[i]);
1392 bh = udf_read_tagged(sb, loc, loc, &ident);
1393 if (!bh)
1394 continue;
1395
1396 st = (struct sparingTable *)bh->b_data;
1397 if (ident != 0 ||
1398 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1399 strlen(UDF_ID_SPARING)) ||
1400 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1401 sb->s_blocksize) {
1402 brelse(bh);
1403 continue;
1404 }
1405
1406 sdata->s_spar_map[i] = bh;
1407 }
1408 map->s_partition_func = udf_get_pblock_spar15;
1409 return 0;
1410}
1411
c0eb31ed 1412static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1413 struct kernel_lb_addr *fileset)
1da177e4
LT		 1414{
1415 struct logicalVolDesc *lvd;
1df2ae31 1416 int i, offset;
1da177e4 1417 uint8_t type;
6c79e987 1418 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1419 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1420 uint16_t ident;
1421 struct buffer_head *bh;
adee11b2 1422 unsigned int table_len;
d759bfa4 1423 int ret;
1da177e4 1424
c0eb31ed
JK		 1425 bh = udf_read_tagged(sb, block, block, &ident);
1426 if (!bh)
d759bfa4 1427 return -EAGAIN;
c0eb31ed 1428 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1429 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1430 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1431 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1432 udf_err(sb, "error loading logical volume descriptor: "
1433 "Partition table too long (%u > %lu)\n", table_len,
1434 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1435 ret = -EIO;
adee11b2
JK		 1436 goto out_bh;
1437 }
1da177e4 1438
cb14d340
JK		 1439 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1440 if (ret)
c0eb31ed 1441 goto out_bh;
1da177e4 1442
cb00ea35 1443 for (i = 0, offset = 0;
adee11b2 1444 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1445 i++, offset += gpm->partitionMapLength) {
1446 struct udf_part_map *map = &sbi->s_partmaps[i];
1447 gpm = (struct genericPartitionMap *)
1448 &(lvd->partitionMaps[offset]);
1449 type = gpm->partitionMapType;
cb00ea35 1450 if (type == 1) {
4b11111a
MS		 1451 struct genericPartitionMap1 *gpm1 =
1452 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1453 map->s_partition_type = UDF_TYPE1_MAP15;
1454 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1455 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1456 map->s_partition_func = NULL;
cb00ea35 1457 } else if (type == 2) {
4b11111a
MS		 1458 struct udfPartitionMap2 *upm2 =
1459 (struct udfPartitionMap2 *)gpm;
1460 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1461 strlen(UDF_ID_VIRTUAL))) {
1462 u16 suf =
1463 le16_to_cpu(((__le16 *)upm2->partIdent.
1464 identSuffix)[0]);
c82a1275 1465 if (suf < 0x0200) {
4b11111a
MS		 1466 map->s_partition_type =
1467 UDF_VIRTUAL_MAP15;
1468 map->s_partition_func =
1469 udf_get_pblock_virt15;
c82a1275 1470 } else {
4b11111a
MS		 1471 map->s_partition_type =
1472 UDF_VIRTUAL_MAP20;
1473 map->s_partition_func =
1474 udf_get_pblock_virt20;
1da177e4 1475 }
4b11111a
MS		 1476 } else if (!strncmp(upm2->partIdent.ident,
1477 UDF_ID_SPARABLE,
1478 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1479 ret = udf_load_sparable_map(sb, map,
1480 (struct sparablePartitionMap *)gpm);
1481 if (ret < 0)
1df2ae31 1482 goto out_bh;
bfb257a5
JK		 1483 } else if (!strncmp(upm2->partIdent.ident,
1484 UDF_ID_METADATA,
1485 strlen(UDF_ID_METADATA))) {
1486 struct udf_meta_data *mdata =
1487 &map->s_type_specific.s_metadata;
1488 struct metadataPartitionMap *mdm =
1489 (struct metadataPartitionMap *)
1490 &(lvd->partitionMaps[offset]);
a983f368
JP		 1491 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1492 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1493
1494 map->s_partition_type = UDF_METADATA_MAP25;
1495 map->s_partition_func = udf_get_pblock_meta25;
1496
1497 mdata->s_meta_file_loc =
1498 le32_to_cpu(mdm->metadataFileLoc);
1499 mdata->s_mirror_file_loc =
1500 le32_to_cpu(mdm->metadataMirrorFileLoc);
1501 mdata->s_bitmap_file_loc =
1502 le32_to_cpu(mdm->metadataBitmapFileLoc);
1503 mdata->s_alloc_unit_size =
1504 le32_to_cpu(mdm->allocUnitSize);
1505 mdata->s_align_unit_size =
1506 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1507 if (mdm->flags & 0x01)
1508 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1509
1510 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1511 le16_to_cpu(*(__le16 *)
1512 mdm->partIdent.identSuffix));
bfb257a5 1513 udf_debug("Metadata part num=%d\n",
a983f368 1514 le16_to_cpu(mdm->partitionNum));
bfb257a5 1515 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1516 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1517 udf_debug("Metadata file loc=%d\n",
a983f368 1518 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1519 udf_debug("Mirror file loc=%d\n",
a983f368 1520 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1521 udf_debug("Bitmap file loc=%d\n",
a983f368 1522 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1523 udf_debug("Flags: %d %d\n",
1524 mdata->s_flags, mdm->flags);
cb00ea35 1525 } else {
3a71fc5d
MS		 1526 udf_debug("Unknown ident: %s\n",
1527 upm2->partIdent.ident);
1da177e4
LT		 1528 continue;
1529 }
6c79e987
MS		 1530 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1531 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1532 }
1533 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1534 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1535 }
1536
cb00ea35 1537 if (fileset) {
5ca4e4be 1538 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1539
1540 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1541 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1542 fileset->logicalBlockNum,
28de7948 1543 fileset->partitionReferenceNum);
1da177e4
LT		 1544 }
1545 if (lvd->integritySeqExt.extLength)
1546 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1547 ret = 0;
c0eb31ed
JK		 1548out_bh:
1549 brelse(bh);
1550 return ret;
1da177e4
LT		 1551}
1552
1553/*
1554 * udf_load_logicalvolint
1555 *
1556 */
5ca4e4be 1557static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1558{
1559 struct buffer_head *bh = NULL;
1560 uint16_t ident;
6c79e987
MS		 1561 struct udf_sb_info *sbi = UDF_SB(sb);
1562 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1563
1564 while (loc.extLength > 0 &&
cb00ea35
CG		 1565 (bh = udf_read_tagged(sb, loc.extLocation,
1566 loc.extLocation, &ident)) &&
1567 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1568 sbi->s_lvid_bh = bh;
1569 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1570
6c79e987 1571 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1572 udf_load_logicalvolint(sb,
6c79e987 1573 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1574
6c79e987 1575 if (sbi->s_lvid_bh != bh)
3bf25cb4 1576 brelse(bh);
1da177e4 1577 loc.extLength -= sb->s_blocksize;
cb00ea35 1578 loc.extLocation++;
1da177e4 1579 }
6c79e987 1580 if (sbi->s_lvid_bh != bh)
3bf25cb4 1581 brelse(bh);
1da177e4
LT		 1582}
1583
e7a4eb86
VN		 1584/*
1585 * Maximum number of Terminating Descriptor redirections. The chosen number is
1586 * arbitrary - just that we hopefully don't limit any real use of rewritten
1587 * inode on write-once media but avoid looping for too long on corrupted media.
1588 */
1589#define UDF_MAX_TD_NESTING 64
1590
1da177e4 1591/*
d759bfa4
JK		 1592 * Process a main/reserve volume descriptor sequence.
1593 * @block First block of first extent of the sequence.
1594 * @lastblock Lastblock of first extent of the sequence.
1595 * @fileset There we store extent containing root fileset
1da177e4 1596 *
d759bfa4
JK		 1597 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1598 * sequence
1da177e4 1599 */
d759bfa4
JK		 1600static noinline int udf_process_sequence(
1601 struct super_block *sb,
1602 sector_t block, sector_t lastblock,
1603 struct kernel_lb_addr *fileset)
1da177e4
LT		 1604{
1605 struct buffer_head *bh = NULL;
1606 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1607 struct udf_vds_record *curr;
1da177e4
LT		 1608 struct generic_desc *gd;
1609 struct volDescPtr *vdp;
2b8f9421 1610 bool done = false;
1da177e4
LT		 1611 uint32_t vdsn;
1612 uint16_t ident;
1613 long next_s = 0, next_e = 0;
d759bfa4 1614 int ret;
e7a4eb86 1615 unsigned int indirections = 0;
1da177e4
LT		 1616
1617 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1618
c0eb31ed
JK		 1619 /*
1620 * Read the main descriptor sequence and find which descriptors
1621 * are in it.
1622 */
cb00ea35 1623 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1624
1625 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1626 if (!bh) {
78ace70c
JP		 1627 udf_err(sb,
1628 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1629 (unsigned long long)block);
d759bfa4 1630 return -EAGAIN;
c0eb31ed 1631 }
1da177e4
LT		 1632
1633 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1634 gd = (struct generic_desc *)bh->b_data;
1635 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1636 switch (ident) {
28de7948 1637 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1638 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1639 if (vdsn >= curr->volDescSeqNum) {
1640 curr->volDescSeqNum = vdsn;
1641 curr->block = block;
cb00ea35
CG		 1642 }
1643 break;
28de7948 1644 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1645 curr = &vds[VDS_POS_VOL_DESC_PTR];
1646 if (vdsn >= curr->volDescSeqNum) {
1647 curr->volDescSeqNum = vdsn;
1648 curr->block = block;
cb00ea35
CG		 1649
1650 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1651 next_s = le32_to_cpu(
1652 vdp->nextVolDescSeqExt.extLocation);
1653 next_e = le32_to_cpu(
1654 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1655 next_e = next_e >> sb->s_blocksize_bits;
1656 next_e += next_s;
1657 }
1658 break;
28de7948 1659 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1660 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1661 if (vdsn >= curr->volDescSeqNum) {
1662 curr->volDescSeqNum = vdsn;
1663 curr->block = block;
cb00ea35
CG		 1664 }
1665 break;
28de7948 1666 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1667 curr = &vds[VDS_POS_PARTITION_DESC];
1668 if (!curr->block)
1669 curr->block = block;
cb00ea35 1670 break;
28de7948 1671 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1672 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1673 if (vdsn >= curr->volDescSeqNum) {
1674 curr->volDescSeqNum = vdsn;
1675 curr->block = block;
cb00ea35
CG		 1676 }
1677 break;
28de7948 1678 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1679 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1680 if (vdsn >= curr->volDescSeqNum) {
1681 curr->volDescSeqNum = vdsn;
1682 curr->block = block;
cb00ea35
CG		 1683 }
1684 break;
28de7948 1685 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
e7a4eb86
VN		 1686 if (++indirections > UDF_MAX_TD_NESTING) {
1687 udf_err(sb, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING);
1688 brelse(bh);
1689 return -EIO;
1690 }
1691
cb00ea35
CG		 1692 vds[VDS_POS_TERMINATING_DESC].block = block;
1693 if (next_e) {
1694 block = next_s;
1695 lastblock = next_e;
1696 next_s = next_e = 0;
4b11111a 1697 } else
2b8f9421 1698 done = true;
cb00ea35 1699 break;
1da177e4 1700 }
3bf25cb4 1701 brelse(bh);
1da177e4 1702 }
c0eb31ed
JK		 1703 /*
1704 * Now read interesting descriptors again and process them
1705 * in a suitable order
1706 */
1707 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1708 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1709 return -EAGAIN;
1710 }
1711 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1712 if (ret < 0)
1713 return ret;
1714
1715 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1716 ret = udf_load_logicalvol(sb,
1717 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1718 fileset);
1719 if (ret < 0)
1720 return ret;
c0eb31ed 1721 }
165923fa 1722
c0eb31ed
JK		 1723 if (vds[VDS_POS_PARTITION_DESC].block) {
1724 /*
1725 * We rescan the whole descriptor sequence to find
1726 * partition descriptor blocks and process them.
1727 */
1728 for (block = vds[VDS_POS_PARTITION_DESC].block;
1729 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1730 block++) {
1731 ret = udf_load_partdesc(sb, block);
1732 if (ret < 0)
1733 return ret;
1734 }
1da177e4
LT		 1735 }
1736
1737 return 0;
1738}
1739
d759bfa4
JK		 1740/*
1741 * Load Volume Descriptor Sequence described by anchor in bh
1742 *
1743 * Returns <0 on error, 0 on success
1744 */
40346005
JK		 1745static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1746 struct kernel_lb_addr *fileset)
1da177e4 1747{
40346005 1748 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1749 sector_t main_s, main_e, reserve_s, reserve_e;
1750 int ret;
1da177e4 1751
40346005
JK		 1752 anchor = (struct anchorVolDescPtr *)bh->b_data;
1753
1754 /* Locate the main sequence */
1755 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1756 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1757 main_e = main_e >> sb->s_blocksize_bits;
1758 main_e += main_s;
1759
1760 /* Locate the reserve sequence */
1761 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1762 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1763 reserve_e = reserve_e >> sb->s_blocksize_bits;
1764 reserve_e += reserve_s;
1765
1766 /* Process the main & reserve sequences */
1767 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1768 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1769 if (ret != -EAGAIN)
1770 return ret;
bff943af 1771 udf_sb_free_partitions(sb);
d759bfa4
JK		 1772 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1773 if (ret < 0) {
1774 udf_sb_free_partitions(sb);
1775 /* No sequence was OK, return -EIO */
1776 if (ret == -EAGAIN)
1777 ret = -EIO;
1778 }
1779 return ret;
1da177e4
LT		 1780}
1781
40346005
JK		 1782/*
1783 * Check whether there is an anchor block in the given block and
1784 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1785 *
1786 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1787 * block
40346005
JK		 1788 */
1789static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1790 struct kernel_lb_addr *fileset)
1197e4df 1791{
40346005
JK		 1792 struct buffer_head *bh;
1793 uint16_t ident;
1794 int ret;
1197e4df 1795
40346005
JK		 1796 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1797 udf_fixed_to_variable(block) >=
1798 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1799 return -EAGAIN;
40346005
JK		 1800
1801 bh = udf_read_tagged(sb, block, block, &ident);
1802 if (!bh)
d759bfa4 1803 return -EAGAIN;
40346005
JK		 1804 if (ident != TAG_IDENT_AVDP) {
1805 brelse(bh);
d759bfa4 1806 return -EAGAIN;
1197e4df 1807 }
40346005
JK		 1808 ret = udf_load_sequence(sb, bh, fileset);
1809 brelse(bh);
1810 return ret;
1197e4df
CL		 1811}
1812
d759bfa4
JK		 1813/*
1814 * Search for an anchor volume descriptor pointer.
1815 *
1816 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1817 * of anchors.
1818 */
1819static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1820 struct kernel_lb_addr *fileset)
1da177e4 1821{
40346005 1822 sector_t last[6];
38b74a53 1823 int i;
40346005
JK		 1824 struct udf_sb_info *sbi = UDF_SB(sb);
1825 int last_count = 0;
d759bfa4 1826 int ret;
1da177e4 1827
40346005
JK		 1828 /* First try user provided anchor */
1829 if (sbi->s_anchor) {
d759bfa4
JK		 1830 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1831 if (ret != -EAGAIN)
1832 return ret;
40346005
JK		 1833 }
1834 /*
1835 * according to spec, anchor is in either:
1836 * block 256
1837 * lastblock-256
1838 * lastblock
1839 * however, if the disc isn't closed, it could be 512.
1840 */
d759bfa4
JK		 1841 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1842 if (ret != -EAGAIN)
1843 return ret;
40346005
JK		 1844 /*
1845 * The trouble is which block is the last one. Drives often misreport
1846 * this so we try various possibilities.
1847 */
d759bfa4
JK		 1848 last[last_count++] = *lastblock;
1849 if (*lastblock >= 1)
1850 last[last_count++] = *lastblock - 1;
1851 last[last_count++] = *lastblock + 1;
1852 if (*lastblock >= 2)
1853 last[last_count++] = *lastblock - 2;
1854 if (*lastblock >= 150)
1855 last[last_count++] = *lastblock - 150;
1856 if (*lastblock >= 152)
1857 last[last_count++] = *lastblock - 152;
1da177e4 1858
40346005
JK		 1859 for (i = 0; i < last_count; i++) {
1860 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1861 sb->s_blocksize_bits)
28f7c4d4 1862 continue;
d759bfa4
JK		 1863 ret = udf_check_anchor_block(sb, last[i], fileset);
1864 if (ret != -EAGAIN) {
1865 if (!ret)
1866 *lastblock = last[i];
1867 return ret;
1868 }
40346005 1869 if (last[i] < 256)
28f7c4d4 1870 continue;
d759bfa4
JK		 1871 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1872 if (ret != -EAGAIN) {
1873 if (!ret)
1874 *lastblock = last[i];
1875 return ret;
1876 }
40346005 1877 }
28f7c4d4 1878
40346005 1879 /* Finally try block 512 in case media is open */
d759bfa4 1880 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1881}
28f7c4d4 1882
40346005
JK		 1883/*
1884 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1885 * area specified by it. The function expects sbi->s_lastblock to be the last
1886 * block on the media.
1887 *
d759bfa4
JK		 1888 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1889 * was not found.
40346005
JK		 1890 */
1891static int udf_find_anchor(struct super_block *sb,
1892 struct kernel_lb_addr *fileset)
1893{
40346005 1894 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1895 sector_t lastblock = sbi->s_last_block;
1896 int ret;
28f7c4d4 1897
d759bfa4
JK		 1898 ret = udf_scan_anchors(sb, &lastblock, fileset);
1899 if (ret != -EAGAIN)
40346005 1900 goto out;
1da177e4 1901
40346005
JK		 1902 /* No anchor found? Try VARCONV conversion of block numbers */
1903 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1904 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1905 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1906 ret = udf_scan_anchors(sb, &lastblock, fileset);
1907 if (ret != -EAGAIN)
40346005 1908 goto out;
1da177e4 1909
d759bfa4 1910 lastblock = sbi->s_last_block;
40346005 1911 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1912 ret = udf_scan_anchors(sb, &lastblock, fileset);
1913 if (ret < 0) {
40346005
JK		 1914 /* VARCONV didn't help. Clear it. */
1915 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1916 }
40346005 1917out:
d759bfa4
JK		 1918 if (ret == 0)
1919 sbi->s_last_block = lastblock;
1920 return ret;
40346005 1921}
1da177e4 1922
40346005
JK		 1923/*
1924 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1925 * Descriptor Sequence.
1926 *
1927 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1928 * block was not found.
40346005
JK		 1929 */
1930static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1931 int silent, struct kernel_lb_addr *fileset)
1932{
1933 struct udf_sb_info *sbi = UDF_SB(sb);
1934 loff_t nsr_off;
d759bfa4 1935 int ret;
40346005
JK		 1936
1937 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1938 if (!silent)
78ace70c 1939 udf_warn(sb, "Bad block size\n");
d759bfa4 1940 return -EINVAL;
40346005
JK		 1941 }
1942 sbi->s_last_block = uopt->lastblock;
1943 if (!uopt->novrs) {
1944 /* Check that it is NSR02 compliant */
1945 nsr_off = udf_check_vsd(sb);
1946 if (!nsr_off) {
1947 if (!silent)
78ace70c 1948 udf_warn(sb, "No VRS found\n");
40346005
JK		 1949 return 0;
1950 }
1951 if (nsr_off == -1)
44499602
PF		 1952 udf_debug("Failed to read sector at offset %d. "
1953 "Assuming open disc. Skipping validity "
1954 "check\n", VSD_FIRST_SECTOR_OFFSET);
40346005
JK		 1955 if (!sbi->s_last_block)
1956 sbi->s_last_block = udf_get_last_block(sb);
1957 } else {
1958 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1959 }
1da177e4 1960
40346005
JK		 1961 /* Look for anchor block and load Volume Descriptor Sequence */
1962 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1963 ret = udf_find_anchor(sb, fileset);
1964 if (ret < 0) {
1965 if (!silent && ret == -EAGAIN)
78ace70c 1966 udf_warn(sb, "No anchor found\n");
d759bfa4 1967 return ret;
40346005 1968 }
d759bfa4 1969 return 0;
1da177e4
LT		 1970}
1971
1972static void udf_open_lvid(struct super_block *sb)
1973{
6c79e987
MS		 1974 struct udf_sb_info *sbi = UDF_SB(sb);
1975 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1976 struct logicalVolIntegrityDesc *lvid;
1977 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1978
165923fa
MS		 1979 if (!bh)
1980 return;
165923fa 1981 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
69d75671
JK		 1982 lvidiu = udf_sb_lvidiu(sb);
1983 if (!lvidiu)
1984 return;
165923fa 1985
69d75671 1986 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1987 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1988 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1989 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1990 CURRENT_TIME);
146bca72 1991 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1992
1993 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1994 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1995 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1996
1997 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1998 mark_buffer_dirty(bh);
146bca72 1999 sbi->s_lvid_dirty = 0;
949f4a7c 2000 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2001 /* Make opening of filesystem visible on the media immediately */
2002 sync_dirty_buffer(bh);
1da177e4
LT		 2003}
2004
2005static void udf_close_lvid(struct super_block *sb)
2006{
6c79e987
MS		 2007 struct udf_sb_info *sbi = UDF_SB(sb);
2008 struct buffer_head *bh = sbi->s_lvid_bh;
2009 struct logicalVolIntegrityDesc *lvid;
165923fa 2010 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 2011
6c79e987
MS		 2012 if (!bh)
2013 return;
69d75671
JK		 2014 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2015 lvidiu = udf_sb_lvidiu(sb);
2016 if (!lvidiu)
2017 return;
6c79e987 2018
949f4a7c 2019 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 2020 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2021 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2022 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
2023 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2024 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2025 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2026 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2027 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2028 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2029 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2030
2031 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 2032 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 2033 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 2034
2035 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 2036 /*
2037 * We set buffer uptodate unconditionally here to avoid spurious
2038 * warnings from mark_buffer_dirty() when previous EIO has marked
2039 * the buffer as !uptodate
2040 */
2041 set_buffer_uptodate(bh);
165923fa 2042 mark_buffer_dirty(bh);
146bca72 2043 sbi->s_lvid_dirty = 0;
949f4a7c 2044 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2045 /* Make closing of filesystem visible on the media immediately */
2046 sync_dirty_buffer(bh);
1da177e4
LT		 2047}
2048
d664b6af
JK		 2049u64 lvid_get_unique_id(struct super_block *sb)
2050{
2051 struct buffer_head *bh;
2052 struct udf_sb_info *sbi = UDF_SB(sb);
2053 struct logicalVolIntegrityDesc *lvid;
2054 struct logicalVolHeaderDesc *lvhd;
2055 u64 uniqueID;
2056 u64 ret;
2057
2058 bh = sbi->s_lvid_bh;
2059 if (!bh)
2060 return 0;
2061
2062 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2063 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2064
2065 mutex_lock(&sbi->s_alloc_mutex);
2066 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2067 if (!(++uniqueID & 0xFFFFFFFF))
2068 uniqueID += 16;
2069 lvhd->uniqueID = cpu_to_le64(uniqueID);
2070 mutex_unlock(&sbi->s_alloc_mutex);
2071 mark_buffer_dirty(bh);
2072
2073 return ret;
1da177e4
LT		 2074}
2075
1da177e4
LT		 2076static int udf_fill_super(struct super_block *sb, void *options, int silent)
2077{
d759bfa4 2078 int ret = -EINVAL;
cb00ea35 2079 struct inode *inode = NULL;
1da177e4 2080 struct udf_options uopt;
5ca4e4be 2081 struct kernel_lb_addr rootdir, fileset;
1da177e4 2082 struct udf_sb_info *sbi;
9181f8bf 2083 bool lvid_open = false;
1da177e4
LT		 2084
2085 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2086 uopt.uid = INVALID_UID;
2087 uopt.gid = INVALID_GID;
1da177e4 2088 uopt.umask = 0;
87bc730c
MS		 2089 uopt.fmode = UDF_INVALID_MODE;
2090 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2091
6c79e987 2092 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2093 if (!sbi)
1da177e4 2094 return -ENOMEM;
28de7948 2095
1da177e4 2096 sb->s_fs_info = sbi;
1da177e4 2097
1e7933de 2098 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2099
6da80894 2100 if (!udf_parse_options((char *)options, &uopt, false))
fdf2657b 2101 goto parse_options_failure;
1da177e4
LT		 2102
2103 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2104 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2105 udf_err(sb, "utf8 cannot be combined with iocharset\n");
fdf2657b 2106 goto parse_options_failure;
1da177e4
LT		 2107 }
2108#ifdef CONFIG_UDF_NLS
cb00ea35 2109 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2110 uopt.nls_map = load_nls_default();
2111 if (!uopt.nls_map)
2112 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2113 else
2114 udf_debug("Using default NLS map\n");
2115 }
2116#endif
2117 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2118 uopt.flags |= (1 << UDF_FLAG_UTF8);
2119
2120 fileset.logicalBlockNum = 0xFFFFFFFF;
2121 fileset.partitionReferenceNum = 0xFFFF;
2122
6c79e987
MS		 2123 sbi->s_flags = uopt.flags;
2124 sbi->s_uid = uopt.uid;
2125 sbi->s_gid = uopt.gid;
2126 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2127 sbi->s_fmode = uopt.fmode;
2128 sbi->s_dmode = uopt.dmode;
6c79e987 2129 sbi->s_nls_map = uopt.nls_map;
c03cad24 2130 rwlock_init(&sbi->s_cred_lock);
1da177e4 2131
cb00ea35 2132 if (uopt.session == 0xFFFFFFFF)
6c79e987 2133 sbi->s_session = udf_get_last_session(sb);
1da177e4 2134 else
6c79e987 2135 sbi->s_session = uopt.session;
1da177e4 2136
6c79e987 2137 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2138
40346005
JK		 2139 /* Fill in the rest of the superblock */
2140 sb->s_op = &udf_sb_ops;
2141 sb->s_export_op = &udf_export_ops;
123e9caf 2142
40346005
JK		 2143 sb->s_magic = UDF_SUPER_MAGIC;
2144 sb->s_time_gran = 1000;
2145
1197e4df 2146 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2147 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2148 } else {
e1defc4f 2149 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2150 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2151 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2152 if (!silent)
78ace70c
JP		 2153 pr_notice("Rescanning with blocksize %d\n",
2154 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2155 brelse(sbi->s_lvid_bh);
2156 sbi->s_lvid_bh = NULL;
1197e4df 2157 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2158 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2159 }
1da177e4 2160 }
d759bfa4
JK		 2161 if (ret < 0) {
2162 if (ret == -EAGAIN) {
2163 udf_warn(sb, "No partition found (1)\n");
2164 ret = -EINVAL;
2165 }
1da177e4
LT		 2166 goto error_out;
2167 }
2168
6c79e987 2169 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2170
6c79e987 2171 if (sbi->s_lvid_bh) {
4b11111a 2172 struct logicalVolIntegrityDescImpUse *lvidiu =
69d75671
JK		 2173 udf_sb_lvidiu(sb);
2174 uint16_t minUDFReadRev;
2175 uint16_t minUDFWriteRev;
1da177e4 2176
69d75671
JK		 2177 if (!lvidiu) {
2178 ret = -EINVAL;
2179 goto error_out;
2180 }
2181 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2182 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
cb00ea35 2183 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c 2184 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
69d75671 2185 minUDFReadRev,
78ace70c 2186 UDF_MAX_READ_VERSION);
d759bfa4 2187 ret = -EINVAL;
1da177e4 2188 goto error_out;
e729eac6
JK		 2189 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2190 !(sb->s_flags & MS_RDONLY)) {
2191 ret = -EACCES;
2192 goto error_out;
2193 }
1da177e4 2194
6c79e987 2195 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2196
2197 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2198 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2199 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2200 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2201 }
2202
6c79e987 2203 if (!sbi->s_partitions) {
78ace70c 2204 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2205 ret = -EINVAL;
1da177e4
LT		 2206 goto error_out;
2207 }
2208
4b11111a 2209 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
e729eac6
JK		 2210 UDF_PART_FLAG_READ_ONLY &&
2211 !(sb->s_flags & MS_RDONLY)) {
2212 ret = -EACCES;
2213 goto error_out;
c1a26e7d 2214 }
39b3f6d6 2215
cb00ea35 2216 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2217 udf_warn(sb, "No fileset found\n");
d759bfa4 2218 ret = -EINVAL;
1da177e4
LT		 2219 goto error_out;
2220 }
2221
cb00ea35 2222 if (!silent) {
5ca4e4be 2223 struct timestamp ts;
56774805 2224 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2225 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2226 sbi->s_volume_ident,
2227 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2228 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4 2229 }
9181f8bf 2230 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4 2231 udf_open_lvid(sb);
9181f8bf
JK		 2232 lvid_open = true;
2233 }
1da177e4
LT		 2234
2235 /* Assign the root inode */
2236 /* assign inodes by physical block number */
2237 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2238 inode = udf_iget(sb, &rootdir);
6d3d5e86 2239 if (IS_ERR(inode)) {
78ace70c 2240 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2241 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
6d3d5e86 2242 ret = PTR_ERR(inode);
1da177e4
LT		 2243 goto error_out;
2244 }
2245
2246 /* Allocate a dentry for the root inode */
48fde701 2247 sb->s_root = d_make_root(inode);
cb00ea35 2248 if (!sb->s_root) {
78ace70c 2249 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2250 ret = -ENOMEM;
1da177e4
LT		 2251 goto error_out;
2252 }
31170b6a 2253 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2254 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2255 return 0;
2256
28de7948 2257error_out:
0d454e4a 2258 iput(sbi->s_vat_inode);
fdf2657b 2259parse_options_failure:
1da177e4
LT		 2260#ifdef CONFIG_UDF_NLS
2261 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2262 unload_nls(sbi->s_nls_map);
1da177e4 2263#endif
9181f8bf 2264 if (lvid_open)
1da177e4 2265 udf_close_lvid(sb);
6c79e987 2266 brelse(sbi->s_lvid_bh);
bff943af 2267 udf_sb_free_partitions(sb);
1da177e4
LT		 2268 kfree(sbi);
2269 sb->s_fs_info = NULL;
28de7948 2270
d759bfa4 2271 return ret;
1da177e4
LT		 2272}
2273
8076c363
JP		 2274void _udf_err(struct super_block *sb, const char *function,
2275 const char *fmt, ...)
1da177e4 2276{
c2bff36c 2277 struct va_format vaf;
1da177e4
LT		 2278 va_list args;
2279
1da177e4 2280 va_start(args, fmt);
c2bff36c
JP		 2281
2282 vaf.fmt = fmt;
2283 vaf.va = &args;
2284
2285 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2286
1da177e4 2287 va_end(args);
1da177e4
LT		 2288}
2289
a40ecd7b
JP		 2290void _udf_warn(struct super_block *sb, const char *function,
2291 const char *fmt, ...)
1da177e4 2292{
c2bff36c 2293 struct va_format vaf;
1da177e4
LT		 2294 va_list args;
2295
cb00ea35 2296 va_start(args, fmt);
c2bff36c
JP		 2297
2298 vaf.fmt = fmt;
2299 vaf.va = &args;
2300
2301 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2302
1da177e4 2303 va_end(args);
1da177e4
LT		 2304}
2305
cb00ea35 2306static void udf_put_super(struct super_block *sb)
1da177e4 2307{
6c79e987 2308 struct udf_sb_info *sbi;
1da177e4 2309
6c79e987 2310 sbi = UDF_SB(sb);
6cfd0148 2311
0d454e4a 2312 iput(sbi->s_vat_inode);
1da177e4
LT		 2313#ifdef CONFIG_UDF_NLS
2314 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2315 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2316#endif
2317 if (!(sb->s_flags & MS_RDONLY))
2318 udf_close_lvid(sb);
6c79e987 2319 brelse(sbi->s_lvid_bh);
bff943af 2320 udf_sb_free_partitions(sb);
bbe48dd8 2321 mutex_destroy(&sbi->s_alloc_mutex);
1da177e4
LT		 2322 kfree(sb->s_fs_info);
2323 sb->s_fs_info = NULL;
2324}
2325
146bca72
JK		 2326static int udf_sync_fs(struct super_block *sb, int wait)
2327{
2328 struct udf_sb_info *sbi = UDF_SB(sb);
2329
2330 mutex_lock(&sbi->s_alloc_mutex);
2331 if (sbi->s_lvid_dirty) {
2332 /*
2333 * Blockdevice will be synced later so we don't have to submit
2334 * the buffer for IO
2335 */
2336 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2337 sbi->s_lvid_dirty = 0;
2338 }
2339 mutex_unlock(&sbi->s_alloc_mutex);
2340
2341 return 0;
2342}
2343
cb00ea35 2344static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2345{
726c3342 2346 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2347 struct udf_sb_info *sbi = UDF_SB(sb);
2348 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2349 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987 2350
69d75671 2351 lvidiu = udf_sb_lvidiu(sb);
1da177e4
LT		 2352 buf->f_type = UDF_SUPER_MAGIC;
2353 buf->f_bsize = sb->s_blocksize;
6c79e987 2354 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2355 buf->f_bfree = udf_count_free(sb);
2356 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2357 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2358 le32_to_cpu(lvidiu->numDirs)) : 0)
2359 + buf->f_bfree;
1da177e4 2360 buf->f_ffree = buf->f_bfree;
cb00ea35 2361 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2362 buf->f_fsid.val[0] = (u32)id;
2363 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2364
2365 return 0;
2366}
2367
4b11111a
MS		 2368static unsigned int udf_count_free_bitmap(struct super_block *sb,
2369 struct udf_bitmap *bitmap)
1da177e4
LT		 2370{
2371 struct buffer_head *bh = NULL;
2372 unsigned int accum = 0;
2373 int index;
2374 int block = 0, newblock;
5ca4e4be 2375 struct kernel_lb_addr loc;
1da177e4 2376 uint32_t bytes;
1da177e4
LT		 2377 uint8_t *ptr;
2378 uint16_t ident;
2379 struct spaceBitmapDesc *bm;
2380
1da177e4 2381 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2382 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2383 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2384
cb00ea35 2385 if (!bh) {
78ace70c 2386 udf_err(sb, "udf_count_free failed\n");
1da177e4 2387 goto out;
cb00ea35 2388 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2389 brelse(bh);
78ace70c 2390 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2391 goto out;
2392 }
2393
2394 bm = (struct spaceBitmapDesc *)bh->b_data;
2395 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2396 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2397 ptr = (uint8_t *)bh->b_data;
1da177e4 2398
cb00ea35 2399 while (bytes > 0) {
01b954a3
MS		 2400 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2401 accum += bitmap_weight((const unsigned long *)(ptr + index),
2402 cur_bytes * 8);
2403 bytes -= cur_bytes;
cb00ea35 2404 if (bytes) {
3bf25cb4 2405 brelse(bh);
97e961fd 2406 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2407 bh = udf_tread(sb, newblock);
cb00ea35 2408 if (!bh) {
1da177e4
LT		 2409 udf_debug("read failed\n");
2410 goto out;
2411 }
2412 index = 0;
28de7948 2413 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2414 }
2415 }
3bf25cb4 2416 brelse(bh);
28de7948 2417out:
1da177e4
LT		 2418 return accum;
2419}
2420
4b11111a
MS		 2421static unsigned int udf_count_free_table(struct super_block *sb,
2422 struct inode *table)
1da177e4
LT		 2423{
2424 unsigned int accum = 0;
ff116fc8 2425 uint32_t elen;
5ca4e4be 2426 struct kernel_lb_addr eloc;
1da177e4 2427 int8_t etype;
ff116fc8 2428 struct extent_position epos;
1da177e4 2429
d1668fe3 2430 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2431 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2432 epos.offset = sizeof(struct unallocSpaceEntry);
2433 epos.bh = NULL;
1da177e4 2434
3a71fc5d 2435 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2436 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2437
3bf25cb4 2438 brelse(epos.bh);
d1668fe3 2439 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2440
2441 return accum;
2442}
cb00ea35
CG		 2443
2444static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2445{
2446 unsigned int accum = 0;
6c79e987
MS		 2447 struct udf_sb_info *sbi;
2448 struct udf_part_map *map;
1da177e4 2449
6c79e987
MS		 2450 sbi = UDF_SB(sb);
2451 if (sbi->s_lvid_bh) {
4b11111a
MS		 2452 struct logicalVolIntegrityDesc *lvid =
2453 (struct logicalVolIntegrityDesc *)
2454 sbi->s_lvid_bh->b_data;
6c79e987 2455 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2456 accum = le32_to_cpu(
2457 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2458 if (accum == 0xFFFFFFFF)
2459 accum = 0;
2460 }
2461 }
2462
2463 if (accum)
2464 return accum;
2465
6c79e987
MS		 2466 map = &sbi->s_partmaps[sbi->s_partition];
2467 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2468 accum += udf_count_free_bitmap(sb,
6c79e987 2469 map->s_uspace.s_bitmap);
1da177e4 2470 }
6c79e987 2471 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2472 accum += udf_count_free_bitmap(sb,
6c79e987 2473 map->s_fspace.s_bitmap);
1da177e4
LT		 2474 }
2475 if (accum)
2476 return accum;
2477
6c79e987 2478 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2479 accum += udf_count_free_table(sb,
6c79e987 2480 map->s_uspace.s_table);
1da177e4 2481 }
6c79e987 2482 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2483 accum += udf_count_free_table(sb,
6c79e987 2484 map->s_fspace.s_table);
1da177e4
LT		 2485 }
2486
2487 return accum;
2488}
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