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udf: Fix conversion of 'dstring' fields to UTF8
[deliverable/linux.git] / fs / udf / super.c
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/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;
9293fcfb 890 uint8_t *outstr;
c0eb31ed
JK		 891 struct buffer_head *bh;
892 uint16_t ident;
d759bfa4 893 int ret = -ENOMEM;
ba9aadd8 894
9293fcfb 895 outstr = kmalloc(128, GFP_NOFS);
ba9aadd8 896 if (!outstr)
9293fcfb 897 return -ENOMEM;
c0eb31ed
JK		 898
899 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 900 if (!bh) {
901 ret = -EAGAIN;
ba9aadd8 902 goto out2;
d759bfa4 903 }
ba9aadd8 904
d759bfa4
JK		 905 if (ident != TAG_IDENT_PVD) {
906 ret = -EIO;
907 goto out_bh;
908 }
1da177e4
LT		 909
910 pvoldesc = (struct primaryVolDesc *)bh->b_data;
911
56774805
MS		 912 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
913 pvoldesc->recordingDateAndTime)) {
af15a298 914#ifdef UDFFS_DEBUG
5ca4e4be 915 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 916 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 917 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
918 ts->minute, le16_to_cpu(ts->typeAndTimezone));
919#endif
1da177e4
LT		 920 }
921
c26f6c61 922 ret = udf_dstrCS0toUTF8(outstr, 31, pvoldesc->volIdent, 32);
9293fcfb
AG		 923 if (ret < 0)
924 goto out_bh;
e9d4cf41 925
9293fcfb
AG		 926 strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
927 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
1da177e4 928
c26f6c61 929 ret = udf_dstrCS0toUTF8(outstr, 127, pvoldesc->volSetIdent, 128);
9293fcfb
AG		 930 if (ret < 0)
931 goto out_bh;
e9d4cf41 932
9293fcfb
AG		 933 outstr[ret] = 0;
934 udf_debug("volSetIdent[] = '%s'\n", outstr);
c0eb31ed 935
ba9aadd8 936 ret = 0;
d759bfa4
JK		 937out_bh:
938 brelse(bh);
ba9aadd8
MS		 939out2:
940 kfree(outstr);
ba9aadd8 941 return ret;
1da177e4
LT		 942}
943
3080a74e
NJ		 944struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
945 u32 meta_file_loc, u32 partition_num)
946{
947 struct kernel_lb_addr addr;
948 struct inode *metadata_fe;
949
950 addr.logicalBlockNum = meta_file_loc;
951 addr.partitionReferenceNum = partition_num;
952
6174c2eb 953 metadata_fe = udf_iget_special(sb, &addr);
3080a74e 954
6d3d5e86 955 if (IS_ERR(metadata_fe)) {
3080a74e 956 udf_warn(sb, "metadata inode efe not found\n");
6d3d5e86
JK		 957 return metadata_fe;
958 }
959 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
3080a74e
NJ		 960 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
961 iput(metadata_fe);
6d3d5e86 962 return ERR_PTR(-EIO);
3080a74e
NJ		 963 }
964
965 return metadata_fe;
966}
967
bfb257a5
JK		 968static int udf_load_metadata_files(struct super_block *sb, int partition)
969{
970 struct udf_sb_info *sbi = UDF_SB(sb);
971 struct udf_part_map *map;
972 struct udf_meta_data *mdata;
5ca4e4be 973 struct kernel_lb_addr addr;
6d3d5e86 974 struct inode *fe;
bfb257a5
JK		 975
976 map = &sbi->s_partmaps[partition];
977 mdata = &map->s_type_specific.s_metadata;
978
979 /* metadata address */
bfb257a5 980 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 981 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 982
6d3d5e86
JK		 983 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
984 map->s_partition_num);
985 if (IS_ERR(fe)) {
3080a74e
NJ		 986 /* mirror file entry */
987 udf_debug("Mirror metadata file location: block = %d part = %d\n",
988 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 989
6d3d5e86
JK		 990 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
991 map->s_partition_num);
bfb257a5 992
6d3d5e86 993 if (IS_ERR(fe)) {
3080a74e 994 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
6d3d5e86 995 return PTR_ERR(fe);
3080a74e 996 }
6d3d5e86
JK		 997 mdata->s_mirror_fe = fe;
998 } else
999 mdata->s_metadata_fe = fe;
1000
bfb257a5
JK		 1001
1002 /*
1003 * bitmap file entry
1004 * Note:
1005 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1006 */
1007 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1008 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1009 addr.partitionReferenceNum = map->s_partition_num;
1010
1011 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 1012 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 1013
6174c2eb 1014 fe = udf_iget_special(sb, &addr);
6d3d5e86 1015 if (IS_ERR(fe)) {
bfb257a5 1016 if (sb->s_flags & MS_RDONLY)
a40ecd7b 1017 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 1018 else {
8076c363 1019 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
6d3d5e86 1020 return PTR_ERR(fe);
bfb257a5 1021 }
6d3d5e86
JK		 1022 } else
1023 mdata->s_bitmap_fe = fe;
bfb257a5
JK		 1024 }
1025
1026 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 1027 return 0;
bfb257a5
JK		 1028}
1029
28de7948 1030static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1031 struct kernel_lb_addr *root)
1da177e4
LT		 1032{
1033 struct fileSetDesc *fset;
1034
1035 fset = (struct fileSetDesc *)bh->b_data;
1036
1037 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1038
6c79e987 1039 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1040
cb00ea35
CG		 1041 udf_debug("Rootdir at block=%d, partition=%d\n",
1042 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1043}
1044
883cb9d1
MS		 1045int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1046{
1047 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1048 return DIV_ROUND_UP(map->s_partition_len +
1049 (sizeof(struct spaceBitmapDesc) << 3),
1050 sb->s_blocksize * 8);
883cb9d1
MS		 1051}
1052
66e1da3f
MS		 1053static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1054{
66e1da3f
MS		 1055 struct udf_bitmap *bitmap;
1056 int nr_groups;
1057 int size;
1058
883cb9d1 1059 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1060 size = sizeof(struct udf_bitmap) +
1061 (sizeof(struct buffer_head *) * nr_groups);
1062
1063 if (size <= PAGE_SIZE)
ed2ae6f6 1064 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1065 else
ed2ae6f6 1066 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1067
75b09e02 1068 if (bitmap == NULL)
66e1da3f 1069 return NULL;
66e1da3f 1070
66e1da3f
MS		 1071 bitmap->s_nr_groups = nr_groups;
1072 return bitmap;
1073}
1074
3fb38dfa
JK		 1075static int udf_fill_partdesc_info(struct super_block *sb,
1076 struct partitionDesc *p, int p_index)
1da177e4 1077{
6c79e987 1078 struct udf_part_map *map;
165923fa 1079 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1080 struct partitionHeaderDesc *phd;
165923fa 1081
3fb38dfa 1082 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1083
1084 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1085 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1086
1087 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1088 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1089 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1090 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1091 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1092 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1093 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1094 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1095
a983f368
JP		 1096 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1097 p_index, map->s_partition_type,
1098 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1099
1100 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1101 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1102 return 0;
165923fa
MS		 1103
1104 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1105 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1106 struct kernel_lb_addr loc = {
165923fa
MS		 1107 .logicalBlockNum = le32_to_cpu(
1108 phd->unallocSpaceTable.extPosition),
3fb38dfa 1109 .partitionReferenceNum = p_index,
165923fa 1110 };
6d3d5e86 1111 struct inode *inode;
165923fa 1112
6174c2eb 1113 inode = udf_iget_special(sb, &loc);
6d3d5e86 1114 if (IS_ERR(inode)) {
165923fa 1115 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1116 p_index);
6d3d5e86 1117 return PTR_ERR(inode);
165923fa 1118 }
6d3d5e86 1119 map->s_uspace.s_table = inode;
165923fa
MS		 1120 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1121 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1122 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1123 }
1124
1125 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1126 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1127 if (!bitmap)
d759bfa4 1128 return -ENOMEM;
165923fa 1129 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1130 bitmap->s_extPosition = le32_to_cpu(
165923fa 1131 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1132 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1133 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1134 p_index, bitmap->s_extPosition);
165923fa
MS		 1135 }
1136
1137 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1138 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1139
1140 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1141 struct kernel_lb_addr loc = {
165923fa
MS		 1142 .logicalBlockNum = le32_to_cpu(
1143 phd->freedSpaceTable.extPosition),
3fb38dfa 1144 .partitionReferenceNum = p_index,
165923fa 1145 };
6d3d5e86 1146 struct inode *inode;
165923fa 1147
6174c2eb 1148 inode = udf_iget_special(sb, &loc);
6d3d5e86 1149 if (IS_ERR(inode)) {
3fb38dfa 1150 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1151 p_index);
6d3d5e86 1152 return PTR_ERR(inode);
165923fa 1153 }
6d3d5e86 1154 map->s_fspace.s_table = inode;
165923fa
MS		 1155 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1156 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1157 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1158 }
1159
1160 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1161 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1162 if (!bitmap)
d759bfa4 1163 return -ENOMEM;
165923fa 1164 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1165 bitmap->s_extPosition = le32_to_cpu(
165923fa 1166 phd->freedSpaceBitmap.extPosition);
2e0838fd 1167 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1168 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1169 p_index, bitmap->s_extPosition);
165923fa 1170 }
3fb38dfa
JK		 1171 return 0;
1172}
1173
e971b0b9
JK		 1174static void udf_find_vat_block(struct super_block *sb, int p_index,
1175 int type1_index, sector_t start_block)
38b74a53
JK		 1176{
1177 struct udf_sb_info *sbi = UDF_SB(sb);
1178 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1179 sector_t vat_block;
5ca4e4be 1180 struct kernel_lb_addr ino;
6d3d5e86 1181 struct inode *inode;
e971b0b9
JK		 1182
1183 /*
1184 * VAT file entry is in the last recorded block. Some broken disks have
1185 * it a few blocks before so try a bit harder...
1186 */
1187 ino.partitionReferenceNum = type1_index;
1188 for (vat_block = start_block;
1189 vat_block >= map->s_partition_root &&
6d3d5e86 1190 vat_block >= start_block - 3; vat_block--) {
e971b0b9 1191 ino.logicalBlockNum = vat_block - map->s_partition_root;
6174c2eb 1192 inode = udf_iget_special(sb, &ino);
6d3d5e86
JK		 1193 if (!IS_ERR(inode)) {
1194 sbi->s_vat_inode = inode;
1195 break;
1196 }
e971b0b9
JK		 1197 }
1198}
1199
1200static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1201{
1202 struct udf_sb_info *sbi = UDF_SB(sb);
1203 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1204 struct buffer_head *bh = NULL;
1205 struct udf_inode_info *vati;
1206 uint32_t pos;
1207 struct virtualAllocationTable20 *vat20;
4bf17af0 1208 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1209
e971b0b9 1210 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1211 if (!sbi->s_vat_inode &&
1212 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1213 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1214 (unsigned long)sbi->s_last_block,
1215 (unsigned long)blocks - 1);
e971b0b9 1216 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1217 }
38b74a53 1218 if (!sbi->s_vat_inode)
d759bfa4 1219 return -EIO;
38b74a53
JK		 1220
1221 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1222 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1223 map->s_type_specific.s_virtual.s_num_entries =
1224 (sbi->s_vat_inode->i_size - 36) >> 2;
1225 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1226 vati = UDF_I(sbi->s_vat_inode);
1227 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1228 pos = udf_block_map(sbi->s_vat_inode, 0);
1229 bh = sb_bread(sb, pos);
1230 if (!bh)
d759bfa4 1231 return -EIO;
fa5e0815
JK		 1232 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1233 } else {
1234 vat20 = (struct virtualAllocationTable20 *)
1235 vati->i_ext.i_data;
1236 }
38b74a53 1237
38b74a53 1238 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1239 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1240 map->s_type_specific.s_virtual.s_num_entries =
1241 (sbi->s_vat_inode->i_size -
1242 map->s_type_specific.s_virtual.
1243 s_start_offset) >> 2;
1244 brelse(bh);
1245 }
1246 return 0;
1247}
1248
d759bfa4
JK		 1249/*
1250 * Load partition descriptor block
1251 *
1252 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1253 * sequence.
1254 */
3fb38dfa
JK		 1255static int udf_load_partdesc(struct super_block *sb, sector_t block)
1256{
1257 struct buffer_head *bh;
1258 struct partitionDesc *p;
1259 struct udf_part_map *map;
1260 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1261 int i, type1_idx;
3fb38dfa
JK		 1262 uint16_t partitionNumber;
1263 uint16_t ident;
d759bfa4 1264 int ret;
3fb38dfa
JK		 1265
1266 bh = udf_read_tagged(sb, block, block, &ident);
1267 if (!bh)
d759bfa4
JK		 1268 return -EAGAIN;
1269 if (ident != TAG_IDENT_PD) {
1270 ret = 0;
3fb38dfa 1271 goto out_bh;
d759bfa4 1272 }
3fb38dfa
JK		 1273
1274 p = (struct partitionDesc *)bh->b_data;
1275 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1276
bfb257a5 1277 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1278 for (i = 0; i < sbi->s_partitions; i++) {
1279 map = &sbi->s_partmaps[i];
1280 udf_debug("Searching map: (%d == %d)\n",
1281 map->s_partition_num, partitionNumber);
38b74a53
JK		 1282 if (map->s_partition_num == partitionNumber &&
1283 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1284 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1285 break;
1286 }
1287
38b74a53 1288 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1289 udf_debug("Partition (%d) not found in partition map\n",
1290 partitionNumber);
d759bfa4 1291 ret = 0;
3fb38dfa
JK		 1292 goto out_bh;
1293 }
165923fa 1294
3fb38dfa 1295 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1296 if (ret < 0)
1297 goto out_bh;
38b74a53
JK		 1298
1299 /*
bfb257a5
JK		 1300 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1301 * PHYSICAL partitions are already set up
38b74a53
JK		 1302 */
1303 type1_idx = i;
44499602
PF		 1304#ifdef UDFFS_DEBUG
1305 map = NULL; /* supress 'maybe used uninitialized' warning */
1306#endif
38b74a53
JK		 1307 for (i = 0; i < sbi->s_partitions; i++) {
1308 map = &sbi->s_partmaps[i];
1309
1310 if (map->s_partition_num == partitionNumber &&
1311 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1312 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1313 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1314 break;
1315 }
1316
d759bfa4
JK		 1317 if (i >= sbi->s_partitions) {
1318 ret = 0;
38b74a53 1319 goto out_bh;
d759bfa4 1320 }
38b74a53
JK		 1321
1322 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1323 if (ret < 0)
38b74a53
JK		 1324 goto out_bh;
1325
bfb257a5
JK		 1326 if (map->s_partition_type == UDF_METADATA_MAP25) {
1327 ret = udf_load_metadata_files(sb, i);
d759bfa4 1328 if (ret < 0) {
78ace70c
JP		 1329 udf_err(sb, "error loading MetaData partition map %d\n",
1330 i);
bfb257a5
JK		 1331 goto out_bh;
1332 }
1333 } else {
e729eac6
JK		 1334 /*
1335 * If we have a partition with virtual map, we don't handle
1336 * writing to it (we overwrite blocks instead of relocating
1337 * them).
1338 */
1339 if (!(sb->s_flags & MS_RDONLY)) {
1340 ret = -EACCES;
1341 goto out_bh;
1342 }
bfb257a5 1343 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1344 if (ret < 0)
bfb257a5 1345 goto out_bh;
bfb257a5 1346 }
d759bfa4 1347 ret = 0;
c0eb31ed 1348out_bh:
2e0838fd 1349 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1350 brelse(bh);
1351 return ret;
1da177e4
LT		 1352}
1353
1df2ae31
JK		 1354static int udf_load_sparable_map(struct super_block *sb,
1355 struct udf_part_map *map,
1356 struct sparablePartitionMap *spm)
1357{
1358 uint32_t loc;
1359 uint16_t ident;
1360 struct sparingTable *st;
1361 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1362 int i;
1363 struct buffer_head *bh;
1364
1365 map->s_partition_type = UDF_SPARABLE_MAP15;
1366 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1367 if (!is_power_of_2(sdata->s_packet_len)) {
1368 udf_err(sb, "error loading logical volume descriptor: "
1369 "Invalid packet length %u\n",
1370 (unsigned)sdata->s_packet_len);
1371 return -EIO;
1372 }
1373 if (spm->numSparingTables > 4) {
1374 udf_err(sb, "error loading logical volume descriptor: "
1375 "Too many sparing tables (%d)\n",
1376 (int)spm->numSparingTables);
1377 return -EIO;
1378 }
1379
1380 for (i = 0; i < spm->numSparingTables; i++) {
1381 loc = le32_to_cpu(spm->locSparingTable[i]);
1382 bh = udf_read_tagged(sb, loc, loc, &ident);
1383 if (!bh)
1384 continue;
1385
1386 st = (struct sparingTable *)bh->b_data;
1387 if (ident != 0 ||
1388 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1389 strlen(UDF_ID_SPARING)) ||
1390 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1391 sb->s_blocksize) {
1392 brelse(bh);
1393 continue;
1394 }
1395
1396 sdata->s_spar_map[i] = bh;
1397 }
1398 map->s_partition_func = udf_get_pblock_spar15;
1399 return 0;
1400}
1401
c0eb31ed 1402static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1403 struct kernel_lb_addr *fileset)
1da177e4
LT		 1404{
1405 struct logicalVolDesc *lvd;
1df2ae31 1406 int i, offset;
1da177e4 1407 uint8_t type;
6c79e987 1408 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1409 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1410 uint16_t ident;
1411 struct buffer_head *bh;
adee11b2 1412 unsigned int table_len;
d759bfa4 1413 int ret;
1da177e4 1414
c0eb31ed
JK		 1415 bh = udf_read_tagged(sb, block, block, &ident);
1416 if (!bh)
d759bfa4 1417 return -EAGAIN;
c0eb31ed 1418 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1419 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1420 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1421 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1422 udf_err(sb, "error loading logical volume descriptor: "
1423 "Partition table too long (%u > %lu)\n", table_len,
1424 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1425 ret = -EIO;
adee11b2
JK		 1426 goto out_bh;
1427 }
1da177e4 1428
cb14d340
JK		 1429 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1430 if (ret)
c0eb31ed 1431 goto out_bh;
1da177e4 1432
cb00ea35 1433 for (i = 0, offset = 0;
adee11b2 1434 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1435 i++, offset += gpm->partitionMapLength) {
1436 struct udf_part_map *map = &sbi->s_partmaps[i];
1437 gpm = (struct genericPartitionMap *)
1438 &(lvd->partitionMaps[offset]);
1439 type = gpm->partitionMapType;
cb00ea35 1440 if (type == 1) {
4b11111a
MS		 1441 struct genericPartitionMap1 *gpm1 =
1442 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1443 map->s_partition_type = UDF_TYPE1_MAP15;
1444 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1445 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1446 map->s_partition_func = NULL;
cb00ea35 1447 } else if (type == 2) {
4b11111a
MS		 1448 struct udfPartitionMap2 *upm2 =
1449 (struct udfPartitionMap2 *)gpm;
1450 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1451 strlen(UDF_ID_VIRTUAL))) {
1452 u16 suf =
1453 le16_to_cpu(((__le16 *)upm2->partIdent.
1454 identSuffix)[0]);
c82a1275 1455 if (suf < 0x0200) {
4b11111a
MS		 1456 map->s_partition_type =
1457 UDF_VIRTUAL_MAP15;
1458 map->s_partition_func =
1459 udf_get_pblock_virt15;
c82a1275 1460 } else {
4b11111a
MS		 1461 map->s_partition_type =
1462 UDF_VIRTUAL_MAP20;
1463 map->s_partition_func =
1464 udf_get_pblock_virt20;
1da177e4 1465 }
4b11111a
MS		 1466 } else if (!strncmp(upm2->partIdent.ident,
1467 UDF_ID_SPARABLE,
1468 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1469 ret = udf_load_sparable_map(sb, map,
1470 (struct sparablePartitionMap *)gpm);
1471 if (ret < 0)
1df2ae31 1472 goto out_bh;
bfb257a5
JK		 1473 } else if (!strncmp(upm2->partIdent.ident,
1474 UDF_ID_METADATA,
1475 strlen(UDF_ID_METADATA))) {
1476 struct udf_meta_data *mdata =
1477 &map->s_type_specific.s_metadata;
1478 struct metadataPartitionMap *mdm =
1479 (struct metadataPartitionMap *)
1480 &(lvd->partitionMaps[offset]);
a983f368
JP		 1481 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1482 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1483
1484 map->s_partition_type = UDF_METADATA_MAP25;
1485 map->s_partition_func = udf_get_pblock_meta25;
1486
1487 mdata->s_meta_file_loc =
1488 le32_to_cpu(mdm->metadataFileLoc);
1489 mdata->s_mirror_file_loc =
1490 le32_to_cpu(mdm->metadataMirrorFileLoc);
1491 mdata->s_bitmap_file_loc =
1492 le32_to_cpu(mdm->metadataBitmapFileLoc);
1493 mdata->s_alloc_unit_size =
1494 le32_to_cpu(mdm->allocUnitSize);
1495 mdata->s_align_unit_size =
1496 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1497 if (mdm->flags & 0x01)
1498 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1499
1500 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1501 le16_to_cpu(*(__le16 *)
1502 mdm->partIdent.identSuffix));
bfb257a5 1503 udf_debug("Metadata part num=%d\n",
a983f368 1504 le16_to_cpu(mdm->partitionNum));
bfb257a5 1505 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1506 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1507 udf_debug("Metadata file loc=%d\n",
a983f368 1508 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1509 udf_debug("Mirror file loc=%d\n",
a983f368 1510 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1511 udf_debug("Bitmap file loc=%d\n",
a983f368 1512 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1513 udf_debug("Flags: %d %d\n",
1514 mdata->s_flags, mdm->flags);
cb00ea35 1515 } else {
3a71fc5d
MS		 1516 udf_debug("Unknown ident: %s\n",
1517 upm2->partIdent.ident);
1da177e4
LT		 1518 continue;
1519 }
6c79e987
MS		 1520 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1521 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1522 }
1523 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1524 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1525 }
1526
cb00ea35 1527 if (fileset) {
5ca4e4be 1528 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1529
1530 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1531 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1532 fileset->logicalBlockNum,
28de7948 1533 fileset->partitionReferenceNum);
1da177e4
LT		 1534 }
1535 if (lvd->integritySeqExt.extLength)
1536 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1537 ret = 0;
c0eb31ed
JK		 1538out_bh:
1539 brelse(bh);
1540 return ret;
1da177e4
LT		 1541}
1542
1543/*
1544 * udf_load_logicalvolint
1545 *
1546 */
5ca4e4be 1547static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1548{
1549 struct buffer_head *bh = NULL;
1550 uint16_t ident;
6c79e987
MS		 1551 struct udf_sb_info *sbi = UDF_SB(sb);
1552 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1553
1554 while (loc.extLength > 0 &&
cb00ea35
CG		 1555 (bh = udf_read_tagged(sb, loc.extLocation,
1556 loc.extLocation, &ident)) &&
1557 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1558 sbi->s_lvid_bh = bh;
1559 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1560
6c79e987 1561 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1562 udf_load_logicalvolint(sb,
6c79e987 1563 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1564
6c79e987 1565 if (sbi->s_lvid_bh != bh)
3bf25cb4 1566 brelse(bh);
1da177e4 1567 loc.extLength -= sb->s_blocksize;
cb00ea35 1568 loc.extLocation++;
1da177e4 1569 }
6c79e987 1570 if (sbi->s_lvid_bh != bh)
3bf25cb4 1571 brelse(bh);
1da177e4
LT		 1572}
1573
e7a4eb86
VN		 1574/*
1575 * Maximum number of Terminating Descriptor redirections. The chosen number is
1576 * arbitrary - just that we hopefully don't limit any real use of rewritten
1577 * inode on write-once media but avoid looping for too long on corrupted media.
1578 */
1579#define UDF_MAX_TD_NESTING 64
1580
1da177e4 1581/*
d759bfa4
JK		 1582 * Process a main/reserve volume descriptor sequence.
1583 * @block First block of first extent of the sequence.
1584 * @lastblock Lastblock of first extent of the sequence.
1585 * @fileset There we store extent containing root fileset
1da177e4 1586 *
d759bfa4
JK		 1587 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1588 * sequence
1da177e4 1589 */
d759bfa4
JK		 1590static noinline int udf_process_sequence(
1591 struct super_block *sb,
1592 sector_t block, sector_t lastblock,
1593 struct kernel_lb_addr *fileset)
1da177e4
LT		 1594{
1595 struct buffer_head *bh = NULL;
1596 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1597 struct udf_vds_record *curr;
1da177e4
LT		 1598 struct generic_desc *gd;
1599 struct volDescPtr *vdp;
2b8f9421 1600 bool done = false;
1da177e4
LT		 1601 uint32_t vdsn;
1602 uint16_t ident;
1603 long next_s = 0, next_e = 0;
d759bfa4 1604 int ret;
e7a4eb86 1605 unsigned int indirections = 0;
1da177e4
LT		 1606
1607 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1608
c0eb31ed
JK		 1609 /*
1610 * Read the main descriptor sequence and find which descriptors
1611 * are in it.
1612 */
cb00ea35 1613 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1614
1615 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1616 if (!bh) {
78ace70c
JP		 1617 udf_err(sb,
1618 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1619 (unsigned long long)block);
d759bfa4 1620 return -EAGAIN;
c0eb31ed 1621 }
1da177e4
LT		 1622
1623 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1624 gd = (struct generic_desc *)bh->b_data;
1625 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1626 switch (ident) {
28de7948 1627 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1628 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1629 if (vdsn >= curr->volDescSeqNum) {
1630 curr->volDescSeqNum = vdsn;
1631 curr->block = block;
cb00ea35
CG		 1632 }
1633 break;
28de7948 1634 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1635 curr = &vds[VDS_POS_VOL_DESC_PTR];
1636 if (vdsn >= curr->volDescSeqNum) {
1637 curr->volDescSeqNum = vdsn;
1638 curr->block = block;
cb00ea35
CG		 1639
1640 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1641 next_s = le32_to_cpu(
1642 vdp->nextVolDescSeqExt.extLocation);
1643 next_e = le32_to_cpu(
1644 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1645 next_e = next_e >> sb->s_blocksize_bits;
1646 next_e += next_s;
1647 }
1648 break;
28de7948 1649 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1650 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1651 if (vdsn >= curr->volDescSeqNum) {
1652 curr->volDescSeqNum = vdsn;
1653 curr->block = block;
cb00ea35
CG		 1654 }
1655 break;
28de7948 1656 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1657 curr = &vds[VDS_POS_PARTITION_DESC];
1658 if (!curr->block)
1659 curr->block = block;
cb00ea35 1660 break;
28de7948 1661 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1662 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1663 if (vdsn >= curr->volDescSeqNum) {
1664 curr->volDescSeqNum = vdsn;
1665 curr->block = block;
cb00ea35
CG		 1666 }
1667 break;
28de7948 1668 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1669 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1670 if (vdsn >= curr->volDescSeqNum) {
1671 curr->volDescSeqNum = vdsn;
1672 curr->block = block;
cb00ea35
CG		 1673 }
1674 break;
28de7948 1675 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
e7a4eb86
VN		 1676 if (++indirections > UDF_MAX_TD_NESTING) {
1677 udf_err(sb, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING);
1678 brelse(bh);
1679 return -EIO;
1680 }
1681
cb00ea35
CG		 1682 vds[VDS_POS_TERMINATING_DESC].block = block;
1683 if (next_e) {
1684 block = next_s;
1685 lastblock = next_e;
1686 next_s = next_e = 0;
4b11111a 1687 } else
2b8f9421 1688 done = true;
cb00ea35 1689 break;
1da177e4 1690 }
3bf25cb4 1691 brelse(bh);
1da177e4 1692 }
c0eb31ed
JK		 1693 /*
1694 * Now read interesting descriptors again and process them
1695 * in a suitable order
1696 */
1697 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1698 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1699 return -EAGAIN;
1700 }
1701 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1702 if (ret < 0)
1703 return ret;
1704
1705 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1706 ret = udf_load_logicalvol(sb,
1707 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1708 fileset);
1709 if (ret < 0)
1710 return ret;
c0eb31ed 1711 }
165923fa 1712
c0eb31ed
JK		 1713 if (vds[VDS_POS_PARTITION_DESC].block) {
1714 /*
1715 * We rescan the whole descriptor sequence to find
1716 * partition descriptor blocks and process them.
1717 */
1718 for (block = vds[VDS_POS_PARTITION_DESC].block;
1719 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1720 block++) {
1721 ret = udf_load_partdesc(sb, block);
1722 if (ret < 0)
1723 return ret;
1724 }
1da177e4
LT		 1725 }
1726
1727 return 0;
1728}
1729
d759bfa4
JK		 1730/*
1731 * Load Volume Descriptor Sequence described by anchor in bh
1732 *
1733 * Returns <0 on error, 0 on success
1734 */
40346005
JK		 1735static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1736 struct kernel_lb_addr *fileset)
1da177e4 1737{
40346005 1738 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1739 sector_t main_s, main_e, reserve_s, reserve_e;
1740 int ret;
1da177e4 1741
40346005
JK		 1742 anchor = (struct anchorVolDescPtr *)bh->b_data;
1743
1744 /* Locate the main sequence */
1745 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1746 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1747 main_e = main_e >> sb->s_blocksize_bits;
1748 main_e += main_s;
1749
1750 /* Locate the reserve sequence */
1751 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1752 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1753 reserve_e = reserve_e >> sb->s_blocksize_bits;
1754 reserve_e += reserve_s;
1755
1756 /* Process the main & reserve sequences */
1757 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1758 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1759 if (ret != -EAGAIN)
1760 return ret;
bff943af 1761 udf_sb_free_partitions(sb);
d759bfa4
JK		 1762 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1763 if (ret < 0) {
1764 udf_sb_free_partitions(sb);
1765 /* No sequence was OK, return -EIO */
1766 if (ret == -EAGAIN)
1767 ret = -EIO;
1768 }
1769 return ret;
1da177e4
LT		 1770}
1771
40346005
JK		 1772/*
1773 * Check whether there is an anchor block in the given block and
1774 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1775 *
1776 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1777 * block
40346005
JK		 1778 */
1779static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1780 struct kernel_lb_addr *fileset)
1197e4df 1781{
40346005
JK		 1782 struct buffer_head *bh;
1783 uint16_t ident;
1784 int ret;
1197e4df 1785
40346005
JK		 1786 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1787 udf_fixed_to_variable(block) >=
1788 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1789 return -EAGAIN;
40346005
JK		 1790
1791 bh = udf_read_tagged(sb, block, block, &ident);
1792 if (!bh)
d759bfa4 1793 return -EAGAIN;
40346005
JK		 1794 if (ident != TAG_IDENT_AVDP) {
1795 brelse(bh);
d759bfa4 1796 return -EAGAIN;
1197e4df 1797 }
40346005
JK		 1798 ret = udf_load_sequence(sb, bh, fileset);
1799 brelse(bh);
1800 return ret;
1197e4df
CL		 1801}
1802
d759bfa4
JK		 1803/*
1804 * Search for an anchor volume descriptor pointer.
1805 *
1806 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1807 * of anchors.
1808 */
1809static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1810 struct kernel_lb_addr *fileset)
1da177e4 1811{
40346005 1812 sector_t last[6];
38b74a53 1813 int i;
40346005
JK		 1814 struct udf_sb_info *sbi = UDF_SB(sb);
1815 int last_count = 0;
d759bfa4 1816 int ret;
1da177e4 1817
40346005
JK		 1818 /* First try user provided anchor */
1819 if (sbi->s_anchor) {
d759bfa4
JK		 1820 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1821 if (ret != -EAGAIN)
1822 return ret;
40346005
JK		 1823 }
1824 /*
1825 * according to spec, anchor is in either:
1826 * block 256
1827 * lastblock-256
1828 * lastblock
1829 * however, if the disc isn't closed, it could be 512.
1830 */
d759bfa4
JK		 1831 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1832 if (ret != -EAGAIN)
1833 return ret;
40346005
JK		 1834 /*
1835 * The trouble is which block is the last one. Drives often misreport
1836 * this so we try various possibilities.
1837 */
d759bfa4
JK		 1838 last[last_count++] = *lastblock;
1839 if (*lastblock >= 1)
1840 last[last_count++] = *lastblock - 1;
1841 last[last_count++] = *lastblock + 1;
1842 if (*lastblock >= 2)
1843 last[last_count++] = *lastblock - 2;
1844 if (*lastblock >= 150)
1845 last[last_count++] = *lastblock - 150;
1846 if (*lastblock >= 152)
1847 last[last_count++] = *lastblock - 152;
1da177e4 1848
40346005
JK		 1849 for (i = 0; i < last_count; i++) {
1850 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1851 sb->s_blocksize_bits)
28f7c4d4 1852 continue;
d759bfa4
JK		 1853 ret = udf_check_anchor_block(sb, last[i], fileset);
1854 if (ret != -EAGAIN) {
1855 if (!ret)
1856 *lastblock = last[i];
1857 return ret;
1858 }
40346005 1859 if (last[i] < 256)
28f7c4d4 1860 continue;
d759bfa4
JK		 1861 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1862 if (ret != -EAGAIN) {
1863 if (!ret)
1864 *lastblock = last[i];
1865 return ret;
1866 }
40346005 1867 }
28f7c4d4 1868
40346005 1869 /* Finally try block 512 in case media is open */
d759bfa4 1870 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1871}
28f7c4d4 1872
40346005
JK		 1873/*
1874 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1875 * area specified by it. The function expects sbi->s_lastblock to be the last
1876 * block on the media.
1877 *
d759bfa4
JK		 1878 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1879 * was not found.
40346005
JK		 1880 */
1881static int udf_find_anchor(struct super_block *sb,
1882 struct kernel_lb_addr *fileset)
1883{
40346005 1884 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1885 sector_t lastblock = sbi->s_last_block;
1886 int ret;
28f7c4d4 1887
d759bfa4
JK		 1888 ret = udf_scan_anchors(sb, &lastblock, fileset);
1889 if (ret != -EAGAIN)
40346005 1890 goto out;
1da177e4 1891
40346005
JK		 1892 /* No anchor found? Try VARCONV conversion of block numbers */
1893 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1894 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1895 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1896 ret = udf_scan_anchors(sb, &lastblock, fileset);
1897 if (ret != -EAGAIN)
40346005 1898 goto out;
1da177e4 1899
d759bfa4 1900 lastblock = sbi->s_last_block;
40346005 1901 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1902 ret = udf_scan_anchors(sb, &lastblock, fileset);
1903 if (ret < 0) {
40346005
JK		 1904 /* VARCONV didn't help. Clear it. */
1905 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1906 }
40346005 1907out:
d759bfa4
JK		 1908 if (ret == 0)
1909 sbi->s_last_block = lastblock;
1910 return ret;
40346005 1911}
1da177e4 1912
40346005
JK		 1913/*
1914 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1915 * Descriptor Sequence.
1916 *
1917 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1918 * block was not found.
40346005
JK		 1919 */
1920static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1921 int silent, struct kernel_lb_addr *fileset)
1922{
1923 struct udf_sb_info *sbi = UDF_SB(sb);
1924 loff_t nsr_off;
d759bfa4 1925 int ret;
40346005
JK		 1926
1927 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1928 if (!silent)
78ace70c 1929 udf_warn(sb, "Bad block size\n");
d759bfa4 1930 return -EINVAL;
40346005
JK		 1931 }
1932 sbi->s_last_block = uopt->lastblock;
1933 if (!uopt->novrs) {
1934 /* Check that it is NSR02 compliant */
1935 nsr_off = udf_check_vsd(sb);
1936 if (!nsr_off) {
1937 if (!silent)
78ace70c 1938 udf_warn(sb, "No VRS found\n");
40346005
JK		 1939 return 0;
1940 }
1941 if (nsr_off == -1)
44499602
PF		 1942 udf_debug("Failed to read sector at offset %d. "
1943 "Assuming open disc. Skipping validity "
1944 "check\n", VSD_FIRST_SECTOR_OFFSET);
40346005
JK		 1945 if (!sbi->s_last_block)
1946 sbi->s_last_block = udf_get_last_block(sb);
1947 } else {
1948 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1949 }
1da177e4 1950
40346005
JK		 1951 /* Look for anchor block and load Volume Descriptor Sequence */
1952 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1953 ret = udf_find_anchor(sb, fileset);
1954 if (ret < 0) {
1955 if (!silent && ret == -EAGAIN)
78ace70c 1956 udf_warn(sb, "No anchor found\n");
d759bfa4 1957 return ret;
40346005 1958 }
d759bfa4 1959 return 0;
1da177e4
LT		 1960}
1961
1962static void udf_open_lvid(struct super_block *sb)
1963{
6c79e987
MS		 1964 struct udf_sb_info *sbi = UDF_SB(sb);
1965 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1966 struct logicalVolIntegrityDesc *lvid;
1967 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1968
165923fa
MS		 1969 if (!bh)
1970 return;
165923fa 1971 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
69d75671
JK		 1972 lvidiu = udf_sb_lvidiu(sb);
1973 if (!lvidiu)
1974 return;
165923fa 1975
69d75671 1976 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1977 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1978 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1979 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1980 CURRENT_TIME);
146bca72 1981 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1982
1983 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1984 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1985 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1986
1987 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1988 mark_buffer_dirty(bh);
146bca72 1989 sbi->s_lvid_dirty = 0;
949f4a7c 1990 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1991 /* Make opening of filesystem visible on the media immediately */
1992 sync_dirty_buffer(bh);
1da177e4
LT		 1993}
1994
1995static void udf_close_lvid(struct super_block *sb)
1996{
6c79e987
MS		 1997 struct udf_sb_info *sbi = UDF_SB(sb);
1998 struct buffer_head *bh = sbi->s_lvid_bh;
1999 struct logicalVolIntegrityDesc *lvid;
165923fa 2000 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 2001
6c79e987
MS		 2002 if (!bh)
2003 return;
69d75671
JK		 2004 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2005 lvidiu = udf_sb_lvidiu(sb);
2006 if (!lvidiu)
2007 return;
6c79e987 2008
949f4a7c 2009 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 2010 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2011 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2012 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
2013 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2014 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2015 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2016 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2017 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2018 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2019 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2020
2021 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 2022 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 2023 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 2024
2025 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 2026 /*
2027 * We set buffer uptodate unconditionally here to avoid spurious
2028 * warnings from mark_buffer_dirty() when previous EIO has marked
2029 * the buffer as !uptodate
2030 */
2031 set_buffer_uptodate(bh);
165923fa 2032 mark_buffer_dirty(bh);
146bca72 2033 sbi->s_lvid_dirty = 0;
949f4a7c 2034 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2035 /* Make closing of filesystem visible on the media immediately */
2036 sync_dirty_buffer(bh);
1da177e4
LT		 2037}
2038
d664b6af
JK		 2039u64 lvid_get_unique_id(struct super_block *sb)
2040{
2041 struct buffer_head *bh;
2042 struct udf_sb_info *sbi = UDF_SB(sb);
2043 struct logicalVolIntegrityDesc *lvid;
2044 struct logicalVolHeaderDesc *lvhd;
2045 u64 uniqueID;
2046 u64 ret;
2047
2048 bh = sbi->s_lvid_bh;
2049 if (!bh)
2050 return 0;
2051
2052 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2053 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2054
2055 mutex_lock(&sbi->s_alloc_mutex);
2056 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2057 if (!(++uniqueID & 0xFFFFFFFF))
2058 uniqueID += 16;
2059 lvhd->uniqueID = cpu_to_le64(uniqueID);
2060 mutex_unlock(&sbi->s_alloc_mutex);
2061 mark_buffer_dirty(bh);
2062
2063 return ret;
1da177e4
LT		 2064}
2065
1da177e4
LT		 2066static int udf_fill_super(struct super_block *sb, void *options, int silent)
2067{
d759bfa4 2068 int ret = -EINVAL;
cb00ea35 2069 struct inode *inode = NULL;
1da177e4 2070 struct udf_options uopt;
5ca4e4be 2071 struct kernel_lb_addr rootdir, fileset;
1da177e4 2072 struct udf_sb_info *sbi;
9181f8bf 2073 bool lvid_open = false;
1da177e4
LT		 2074
2075 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2076 uopt.uid = INVALID_UID;
2077 uopt.gid = INVALID_GID;
1da177e4 2078 uopt.umask = 0;
87bc730c
MS		 2079 uopt.fmode = UDF_INVALID_MODE;
2080 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2081
6c79e987 2082 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2083 if (!sbi)
1da177e4 2084 return -ENOMEM;
28de7948 2085
1da177e4 2086 sb->s_fs_info = sbi;
1da177e4 2087
1e7933de 2088 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2089
6da80894 2090 if (!udf_parse_options((char *)options, &uopt, false))
fdf2657b 2091 goto parse_options_failure;
1da177e4
LT		 2092
2093 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2094 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2095 udf_err(sb, "utf8 cannot be combined with iocharset\n");
fdf2657b 2096 goto parse_options_failure;
1da177e4
LT		 2097 }
2098#ifdef CONFIG_UDF_NLS
cb00ea35 2099 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2100 uopt.nls_map = load_nls_default();
2101 if (!uopt.nls_map)
2102 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2103 else
2104 udf_debug("Using default NLS map\n");
2105 }
2106#endif
2107 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2108 uopt.flags |= (1 << UDF_FLAG_UTF8);
2109
2110 fileset.logicalBlockNum = 0xFFFFFFFF;
2111 fileset.partitionReferenceNum = 0xFFFF;
2112
6c79e987
MS		 2113 sbi->s_flags = uopt.flags;
2114 sbi->s_uid = uopt.uid;
2115 sbi->s_gid = uopt.gid;
2116 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2117 sbi->s_fmode = uopt.fmode;
2118 sbi->s_dmode = uopt.dmode;
6c79e987 2119 sbi->s_nls_map = uopt.nls_map;
c03cad24 2120 rwlock_init(&sbi->s_cred_lock);
1da177e4 2121
cb00ea35 2122 if (uopt.session == 0xFFFFFFFF)
6c79e987 2123 sbi->s_session = udf_get_last_session(sb);
1da177e4 2124 else
6c79e987 2125 sbi->s_session = uopt.session;
1da177e4 2126
6c79e987 2127 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2128
40346005
JK		 2129 /* Fill in the rest of the superblock */
2130 sb->s_op = &udf_sb_ops;
2131 sb->s_export_op = &udf_export_ops;
123e9caf 2132
40346005
JK		 2133 sb->s_magic = UDF_SUPER_MAGIC;
2134 sb->s_time_gran = 1000;
2135
1197e4df 2136 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2137 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2138 } else {
e1defc4f 2139 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2140 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2141 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2142 if (!silent)
78ace70c
JP		 2143 pr_notice("Rescanning with blocksize %d\n",
2144 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2145 brelse(sbi->s_lvid_bh);
2146 sbi->s_lvid_bh = NULL;
1197e4df 2147 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2148 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2149 }
1da177e4 2150 }
d759bfa4
JK		 2151 if (ret < 0) {
2152 if (ret == -EAGAIN) {
2153 udf_warn(sb, "No partition found (1)\n");
2154 ret = -EINVAL;
2155 }
1da177e4
LT		 2156 goto error_out;
2157 }
2158
6c79e987 2159 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2160
6c79e987 2161 if (sbi->s_lvid_bh) {
4b11111a 2162 struct logicalVolIntegrityDescImpUse *lvidiu =
69d75671
JK		 2163 udf_sb_lvidiu(sb);
2164 uint16_t minUDFReadRev;
2165 uint16_t minUDFWriteRev;
1da177e4 2166
69d75671
JK		 2167 if (!lvidiu) {
2168 ret = -EINVAL;
2169 goto error_out;
2170 }
2171 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2172 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
cb00ea35 2173 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c 2174 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
69d75671 2175 minUDFReadRev,
78ace70c 2176 UDF_MAX_READ_VERSION);
d759bfa4 2177 ret = -EINVAL;
1da177e4 2178 goto error_out;
e729eac6
JK		 2179 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2180 !(sb->s_flags & MS_RDONLY)) {
2181 ret = -EACCES;
2182 goto error_out;
2183 }
1da177e4 2184
6c79e987 2185 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2186
2187 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2188 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2189 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2190 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2191 }
2192
6c79e987 2193 if (!sbi->s_partitions) {
78ace70c 2194 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2195 ret = -EINVAL;
1da177e4
LT		 2196 goto error_out;
2197 }
2198
4b11111a 2199 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
e729eac6
JK		 2200 UDF_PART_FLAG_READ_ONLY &&
2201 !(sb->s_flags & MS_RDONLY)) {
2202 ret = -EACCES;
2203 goto error_out;
c1a26e7d 2204 }
39b3f6d6 2205
cb00ea35 2206 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2207 udf_warn(sb, "No fileset found\n");
d759bfa4 2208 ret = -EINVAL;
1da177e4
LT		 2209 goto error_out;
2210 }
2211
cb00ea35 2212 if (!silent) {
5ca4e4be 2213 struct timestamp ts;
56774805 2214 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2215 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2216 sbi->s_volume_ident,
2217 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2218 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4 2219 }
9181f8bf 2220 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4 2221 udf_open_lvid(sb);
9181f8bf
JK		 2222 lvid_open = true;
2223 }
1da177e4
LT		 2224
2225 /* Assign the root inode */
2226 /* assign inodes by physical block number */
2227 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2228 inode = udf_iget(sb, &rootdir);
6d3d5e86 2229 if (IS_ERR(inode)) {
78ace70c 2230 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2231 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
6d3d5e86 2232 ret = PTR_ERR(inode);
1da177e4
LT		 2233 goto error_out;
2234 }
2235
2236 /* Allocate a dentry for the root inode */
48fde701 2237 sb->s_root = d_make_root(inode);
cb00ea35 2238 if (!sb->s_root) {
78ace70c 2239 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2240 ret = -ENOMEM;
1da177e4
LT		 2241 goto error_out;
2242 }
31170b6a 2243 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2244 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2245 return 0;
2246
28de7948 2247error_out:
0d454e4a 2248 iput(sbi->s_vat_inode);
fdf2657b 2249parse_options_failure:
1da177e4
LT		 2250#ifdef CONFIG_UDF_NLS
2251 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2252 unload_nls(sbi->s_nls_map);
1da177e4 2253#endif
9181f8bf 2254 if (lvid_open)
1da177e4 2255 udf_close_lvid(sb);
6c79e987 2256 brelse(sbi->s_lvid_bh);
bff943af 2257 udf_sb_free_partitions(sb);
1da177e4
LT		 2258 kfree(sbi);
2259 sb->s_fs_info = NULL;
28de7948 2260
d759bfa4 2261 return ret;
1da177e4
LT		 2262}
2263
8076c363
JP		 2264void _udf_err(struct super_block *sb, const char *function,
2265 const char *fmt, ...)
1da177e4 2266{
c2bff36c 2267 struct va_format vaf;
1da177e4
LT		 2268 va_list args;
2269
1da177e4 2270 va_start(args, fmt);
c2bff36c
JP		 2271
2272 vaf.fmt = fmt;
2273 vaf.va = &args;
2274
2275 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2276
1da177e4 2277 va_end(args);
1da177e4
LT		 2278}
2279
a40ecd7b
JP		 2280void _udf_warn(struct super_block *sb, const char *function,
2281 const char *fmt, ...)
1da177e4 2282{
c2bff36c 2283 struct va_format vaf;
1da177e4
LT		 2284 va_list args;
2285
cb00ea35 2286 va_start(args, fmt);
c2bff36c
JP		 2287
2288 vaf.fmt = fmt;
2289 vaf.va = &args;
2290
2291 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2292
1da177e4 2293 va_end(args);
1da177e4
LT		 2294}
2295
cb00ea35 2296static void udf_put_super(struct super_block *sb)
1da177e4 2297{
6c79e987 2298 struct udf_sb_info *sbi;
1da177e4 2299
6c79e987 2300 sbi = UDF_SB(sb);
6cfd0148 2301
0d454e4a 2302 iput(sbi->s_vat_inode);
1da177e4
LT		 2303#ifdef CONFIG_UDF_NLS
2304 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2305 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2306#endif
2307 if (!(sb->s_flags & MS_RDONLY))
2308 udf_close_lvid(sb);
6c79e987 2309 brelse(sbi->s_lvid_bh);
bff943af 2310 udf_sb_free_partitions(sb);
bbe48dd8 2311 mutex_destroy(&sbi->s_alloc_mutex);
1da177e4
LT		 2312 kfree(sb->s_fs_info);
2313 sb->s_fs_info = NULL;
2314}
2315
146bca72
JK		 2316static int udf_sync_fs(struct super_block *sb, int wait)
2317{
2318 struct udf_sb_info *sbi = UDF_SB(sb);
2319
2320 mutex_lock(&sbi->s_alloc_mutex);
2321 if (sbi->s_lvid_dirty) {
2322 /*
2323 * Blockdevice will be synced later so we don't have to submit
2324 * the buffer for IO
2325 */
2326 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2327 sbi->s_lvid_dirty = 0;
2328 }
2329 mutex_unlock(&sbi->s_alloc_mutex);
2330
2331 return 0;
2332}
2333
cb00ea35 2334static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2335{
726c3342 2336 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2337 struct udf_sb_info *sbi = UDF_SB(sb);
2338 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2339 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987 2340
69d75671 2341 lvidiu = udf_sb_lvidiu(sb);
1da177e4
LT		 2342 buf->f_type = UDF_SUPER_MAGIC;
2343 buf->f_bsize = sb->s_blocksize;
6c79e987 2344 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2345 buf->f_bfree = udf_count_free(sb);
2346 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2347 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2348 le32_to_cpu(lvidiu->numDirs)) : 0)
2349 + buf->f_bfree;
1da177e4 2350 buf->f_ffree = buf->f_bfree;
9fba7056 2351 buf->f_namelen = UDF_NAME_LEN;
557f5a14
CL		 2352 buf->f_fsid.val[0] = (u32)id;
2353 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2354
2355 return 0;
2356}
2357
4b11111a
MS		 2358static unsigned int udf_count_free_bitmap(struct super_block *sb,
2359 struct udf_bitmap *bitmap)
1da177e4
LT		 2360{
2361 struct buffer_head *bh = NULL;
2362 unsigned int accum = 0;
2363 int index;
2364 int block = 0, newblock;
5ca4e4be 2365 struct kernel_lb_addr loc;
1da177e4 2366 uint32_t bytes;
1da177e4
LT		 2367 uint8_t *ptr;
2368 uint16_t ident;
2369 struct spaceBitmapDesc *bm;
2370
1da177e4 2371 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2372 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2373 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2374
cb00ea35 2375 if (!bh) {
78ace70c 2376 udf_err(sb, "udf_count_free failed\n");
1da177e4 2377 goto out;
cb00ea35 2378 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2379 brelse(bh);
78ace70c 2380 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2381 goto out;
2382 }
2383
2384 bm = (struct spaceBitmapDesc *)bh->b_data;
2385 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2386 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2387 ptr = (uint8_t *)bh->b_data;
1da177e4 2388
cb00ea35 2389 while (bytes > 0) {
01b954a3
MS		 2390 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2391 accum += bitmap_weight((const unsigned long *)(ptr + index),
2392 cur_bytes * 8);
2393 bytes -= cur_bytes;
cb00ea35 2394 if (bytes) {
3bf25cb4 2395 brelse(bh);
97e961fd 2396 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2397 bh = udf_tread(sb, newblock);
cb00ea35 2398 if (!bh) {
1da177e4
LT		 2399 udf_debug("read failed\n");
2400 goto out;
2401 }
2402 index = 0;
28de7948 2403 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2404 }
2405 }
3bf25cb4 2406 brelse(bh);
28de7948 2407out:
1da177e4
LT		 2408 return accum;
2409}
2410
4b11111a
MS		 2411static unsigned int udf_count_free_table(struct super_block *sb,
2412 struct inode *table)
1da177e4
LT		 2413{
2414 unsigned int accum = 0;
ff116fc8 2415 uint32_t elen;
5ca4e4be 2416 struct kernel_lb_addr eloc;
1da177e4 2417 int8_t etype;
ff116fc8 2418 struct extent_position epos;
1da177e4 2419
d1668fe3 2420 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2421 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2422 epos.offset = sizeof(struct unallocSpaceEntry);
2423 epos.bh = NULL;
1da177e4 2424
3a71fc5d 2425 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2426 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2427
3bf25cb4 2428 brelse(epos.bh);
d1668fe3 2429 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2430
2431 return accum;
2432}
cb00ea35
CG		 2433
2434static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2435{
2436 unsigned int accum = 0;
6c79e987
MS		 2437 struct udf_sb_info *sbi;
2438 struct udf_part_map *map;
1da177e4 2439
6c79e987
MS		 2440 sbi = UDF_SB(sb);
2441 if (sbi->s_lvid_bh) {
4b11111a
MS		 2442 struct logicalVolIntegrityDesc *lvid =
2443 (struct logicalVolIntegrityDesc *)
2444 sbi->s_lvid_bh->b_data;
6c79e987 2445 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2446 accum = le32_to_cpu(
2447 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2448 if (accum == 0xFFFFFFFF)
2449 accum = 0;
2450 }
2451 }
2452
2453 if (accum)
2454 return accum;
2455
6c79e987
MS		 2456 map = &sbi->s_partmaps[sbi->s_partition];
2457 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2458 accum += udf_count_free_bitmap(sb,
6c79e987 2459 map->s_uspace.s_bitmap);
1da177e4 2460 }
6c79e987 2461 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2462 accum += udf_count_free_bitmap(sb,
6c79e987 2463 map->s_fspace.s_bitmap);
1da177e4
LT		 2464 }
2465 if (accum)
2466 return accum;
2467
6c79e987 2468 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2469 accum += udf_count_free_table(sb,
6c79e987 2470 map->s_uspace.s_table);
1da177e4 2471 }
6c79e987 2472 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2473 accum += udf_count_free_table(sb,
6c79e987 2474 map->s_fspace.s_table);
1da177e4
LT		 2475 }
2476
2477 return accum;
2478}
Linux kernel - Deliverables
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