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ALSA: hda - add headset mic detect quirk for a Dell laptop
[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/buffer_head.h>
52#include <linux/vfs.h>
53#include <linux/vmalloc.h>
dc5d39be 54#include <linux/errno.h>
6da80894
MS		 55#include <linux/mount.h>
56#include <linux/seq_file.h>
01b954a3 57#include <linux/bitmap.h>
f845fced 58#include <linux/crc-itu-t.h>
1df2ae31 59#include <linux/log2.h>
1da177e4
LT		 60#include <asm/byteorder.h>
61
1da177e4
LT		 62#include "udf_sb.h"
63#include "udf_i.h"
64
65#include <linux/init.h>
66#include <asm/uaccess.h>
67
68#define VDS_POS_PRIMARY_VOL_DESC 0
69#define VDS_POS_UNALLOC_SPACE_DESC 1
70#define VDS_POS_LOGICAL_VOL_DESC 2
71#define VDS_POS_PARTITION_DESC 3
72#define VDS_POS_IMP_USE_VOL_DESC 4
73#define VDS_POS_VOL_DESC_PTR 5
74#define VDS_POS_TERMINATING_DESC 6
75#define VDS_POS_LENGTH 7
76
6da80894
MS		 77#define UDF_DEFAULT_BLOCKSIZE 2048
78
44499602
PF		 79#define VSD_FIRST_SECTOR_OFFSET 32768
80#define VSD_MAX_SECTOR_OFFSET 0x800000
81
8de52778
AV		 82enum { UDF_MAX_LINKS = 0xffff };
83
1da177e4
LT		 84/* These are the "meat" - everything else is stuffing */
85static int udf_fill_super(struct super_block *, void *, int);
86static void udf_put_super(struct super_block *);
146bca72 87static int udf_sync_fs(struct super_block *, int);
1da177e4 88static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 89static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 90static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
91 struct kernel_lb_addr *);
cb00ea35 92static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 93 struct kernel_lb_addr *);
1da177e4
LT		 94static void udf_open_lvid(struct super_block *);
95static void udf_close_lvid(struct super_block *);
96static unsigned int udf_count_free(struct super_block *);
726c3342 97static int udf_statfs(struct dentry *, struct kstatfs *);
34c80b1d 98static int udf_show_options(struct seq_file *, struct dentry *);
1da177e4 99
69d75671 100struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
6c79e987 101{
69d75671
JK		 102 struct logicalVolIntegrityDesc *lvid;
103 unsigned int partnum;
104 unsigned int offset;
105
106 if (!UDF_SB(sb)->s_lvid_bh)
107 return NULL;
108 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
109 partnum = le32_to_cpu(lvid->numOfPartitions);
110 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
111 offsetof(struct logicalVolIntegrityDesc, impUse)) /
112 (2 * sizeof(uint32_t)) < partnum) {
113 udf_err(sb, "Logical volume integrity descriptor corrupted "
114 "(numOfPartitions = %u)!\n", partnum);
115 return NULL;
116 }
117 /* The offset is to skip freeSpaceTable and sizeTable arrays */
118 offset = partnum * 2 * sizeof(uint32_t);
6c79e987
MS		 119 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
120}
121
1da177e4 122/* UDF filesystem type */
152a0836
AV		 123static struct dentry *udf_mount(struct file_system_type *fs_type,
124 int flags, const char *dev_name, void *data)
1da177e4 125{
152a0836 126 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 127}
128
129static struct file_system_type udf_fstype = {
28de7948
CG		 130 .owner = THIS_MODULE,
131 .name = "udf",
152a0836 132 .mount = udf_mount,
28de7948
CG		 133 .kill_sb = kill_block_super,
134 .fs_flags = FS_REQUIRES_DEV,
1da177e4 135};
3e64fe5b 136MODULE_ALIAS_FS("udf");
1da177e4 137
cb00ea35 138static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 139
140static struct inode *udf_alloc_inode(struct super_block *sb)
141{
142 struct udf_inode_info *ei;
3a71fc5d 143 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 144 if (!ei)
145 return NULL;
95f8797f
DB		 146
147 ei->i_unique = 0;
148 ei->i_lenExtents = 0;
149 ei->i_next_alloc_block = 0;
150 ei->i_next_alloc_goal = 0;
151 ei->i_strat4096 = 0;
4d0fb621 152 init_rwsem(&ei->i_data_sem);
99600051
NJ		 153 ei->cached_extent.lstart = -1;
154 spin_lock_init(&ei->i_extent_cache_lock);
95f8797f 155
1da177e4
LT		 156 return &ei->vfs_inode;
157}
158
fa0d7e3d 159static void udf_i_callback(struct rcu_head *head)
1da177e4 160{
fa0d7e3d 161 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 162 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
163}
164
fa0d7e3d
NP		 165static void udf_destroy_inode(struct inode *inode)
166{
167 call_rcu(&inode->i_rcu, udf_i_callback);
168}
169
51cc5068 170static void init_once(void *foo)
1da177e4 171{
cb00ea35 172 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 173
a35afb83
CL		 174 ei->i_ext.i_data = NULL;
175 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 176}
177
53ea18de 178static int __init init_inodecache(void)
1da177e4
LT		 179{
180 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
181 sizeof(struct udf_inode_info),
cb00ea35
CG		 182 0, (SLAB_RECLAIM_ACCOUNT |
183 SLAB_MEM_SPREAD),
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;
282 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
283 nr_groups);
284
285 for (i = 0; i < nr_groups; i++)
286 if (bitmap->s_block_bitmap[i])
287 brelse(bitmap->s_block_bitmap[i]);
288
289 if (size <= PAGE_SIZE)
290 kfree(bitmap);
291 else
292 vfree(bitmap);
293}
294
295static void udf_free_partition(struct udf_part_map *map)
296{
297 int i;
298 struct udf_meta_data *mdata;
299
300 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
301 iput(map->s_uspace.s_table);
302 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
303 iput(map->s_fspace.s_table);
304 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
305 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
306 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
307 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
308 if (map->s_partition_type == UDF_SPARABLE_MAP15)
309 for (i = 0; i < 4; i++)
310 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
311 else if (map->s_partition_type == UDF_METADATA_MAP25) {
312 mdata = &map->s_type_specific.s_metadata;
313 iput(mdata->s_metadata_fe);
314 mdata->s_metadata_fe = NULL;
315
316 iput(mdata->s_mirror_fe);
317 mdata->s_mirror_fe = NULL;
318
319 iput(mdata->s_bitmap_fe);
320 mdata->s_bitmap_fe = NULL;
321 }
322}
323
324static void udf_sb_free_partitions(struct super_block *sb)
325{
326 struct udf_sb_info *sbi = UDF_SB(sb);
327 int i;
1b1baff6
NJ		 328 if (sbi->s_partmaps == NULL)
329 return;
bff943af
JK		 330 for (i = 0; i < sbi->s_partitions; i++)
331 udf_free_partition(&sbi->s_partmaps[i]);
332 kfree(sbi->s_partmaps);
333 sbi->s_partmaps = NULL;
334}
335
34c80b1d 336static int udf_show_options(struct seq_file *seq, struct dentry *root)
6da80894 337{
34c80b1d 338 struct super_block *sb = root->d_sb;
6da80894
MS		 339 struct udf_sb_info *sbi = UDF_SB(sb);
340
341 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
342 seq_puts(seq, ",nostrict");
1197e4df 343 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 344 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
345 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
346 seq_puts(seq, ",unhide");
347 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
348 seq_puts(seq, ",undelete");
349 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
350 seq_puts(seq, ",noadinicb");
351 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
352 seq_puts(seq, ",shortad");
353 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
354 seq_puts(seq, ",uid=forget");
355 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
356 seq_puts(seq, ",uid=ignore");
357 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
358 seq_puts(seq, ",gid=forget");
359 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
360 seq_puts(seq, ",gid=ignore");
361 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
c2ba138a 362 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
6da80894 363 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
c2ba138a 364 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
6da80894 365 if (sbi->s_umask != 0)
faa17292 366 seq_printf(seq, ",umask=%ho", sbi->s_umask);
87bc730c 367 if (sbi->s_fmode != UDF_INVALID_MODE)
faa17292 368 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
87bc730c 369 if (sbi->s_dmode != UDF_INVALID_MODE)
faa17292 370 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
6da80894
MS		 371 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
372 seq_printf(seq, ",session=%u", sbi->s_session);
373 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
374 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 375 if (sbi->s_anchor != 0)
376 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 377 /*
378 * volume, partition, fileset and rootdir seem to be ignored
379 * currently
380 */
381 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
382 seq_puts(seq, ",utf8");
383 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
384 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
385
386 return 0;
387}
388
1da177e4
LT		 389/*
390 * udf_parse_options
391 *
392 * PURPOSE
393 * Parse mount options.
394 *
395 * DESCRIPTION
396 * The following mount options are supported:
397 *
398 * gid= Set the default group.
399 * umask= Set the default umask.
7ac9bcd5
MS		 400 * mode= Set the default file permissions.
401 * dmode= Set the default directory permissions.
1da177e4
LT		 402 * uid= Set the default user.
403 * bs= Set the block size.
404 * unhide Show otherwise hidden files.
405 * undelete Show deleted files in lists.
406 * adinicb Embed data in the inode (default)
407 * noadinicb Don't embed data in the inode
408 * shortad Use short ad's
409 * longad Use long ad's (default)
410 * nostrict Unset strict conformance
411 * iocharset= Set the NLS character set
412 *
413 * The remaining are for debugging and disaster recovery:
414 *
28de7948 415 * novrs Skip volume sequence recognition
1da177e4
LT		 416 *
417 * The following expect a offset from 0.
418 *
419 * session= Set the CDROM session (default= last session)
420 * anchor= Override standard anchor location. (default= 256)
421 * volume= Override the VolumeDesc location. (unused)
422 * partition= Override the PartitionDesc location. (unused)
423 * lastblock= Set the last block of the filesystem/
424 *
425 * The following expect a offset from the partition root.
426 *
427 * fileset= Override the fileset block location. (unused)
428 * rootdir= Override the root directory location. (unused)
429 * WARNING: overriding the rootdir to a non-directory may
430 * yield highly unpredictable results.
431 *
432 * PRE-CONDITIONS
433 * options Pointer to mount options string.
434 * uopts Pointer to mount options variable.
435 *
436 * POST-CONDITIONS
437 * <return> 1 Mount options parsed okay.
438 * <return> 0 Error parsing mount options.
439 *
440 * HISTORY
441 * July 1, 1997 - Andrew E. Mileski
442 * Written, tested, and released.
443 */
28de7948 444
1da177e4
LT		 445enum {
446 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
447 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
448 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
449 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
450 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 451 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
452 Opt_fmode, Opt_dmode
1da177e4
LT		 453};
454
a447c093 455static const match_table_t tokens = {
28de7948
CG		 456 {Opt_novrs, "novrs"},
457 {Opt_nostrict, "nostrict"},
458 {Opt_bs, "bs=%u"},
459 {Opt_unhide, "unhide"},
460 {Opt_undelete, "undelete"},
461 {Opt_noadinicb, "noadinicb"},
462 {Opt_adinicb, "adinicb"},
463 {Opt_shortad, "shortad"},
464 {Opt_longad, "longad"},
465 {Opt_uforget, "uid=forget"},
466 {Opt_uignore, "uid=ignore"},
467 {Opt_gforget, "gid=forget"},
468 {Opt_gignore, "gid=ignore"},
469 {Opt_gid, "gid=%u"},
470 {Opt_uid, "uid=%u"},
471 {Opt_umask, "umask=%o"},
472 {Opt_session, "session=%u"},
473 {Opt_lastblock, "lastblock=%u"},
474 {Opt_anchor, "anchor=%u"},
475 {Opt_volume, "volume=%u"},
476 {Opt_partition, "partition=%u"},
477 {Opt_fileset, "fileset=%u"},
478 {Opt_rootdir, "rootdir=%u"},
479 {Opt_utf8, "utf8"},
480 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 481 {Opt_fmode, "mode=%o"},
482 {Opt_dmode, "dmode=%o"},
28de7948 483 {Opt_err, NULL}
1da177e4
LT		 484};
485
6da80894
MS		 486static int udf_parse_options(char *options, struct udf_options *uopt,
487 bool remount)
1da177e4
LT		 488{
489 char *p;
490 int option;
491
492 uopt->novrs = 0;
1da177e4
LT		 493 uopt->partition = 0xFFFF;
494 uopt->session = 0xFFFFFFFF;
495 uopt->lastblock = 0;
496 uopt->anchor = 0;
497 uopt->volume = 0xFFFFFFFF;
498 uopt->rootdir = 0xFFFFFFFF;
499 uopt->fileset = 0xFFFFFFFF;
500 uopt->nls_map = NULL;
501
502 if (!options)
503 return 1;
504
cb00ea35 505 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 506 substring_t args[MAX_OPT_ARGS];
507 int token;
8c6915ae 508 unsigned n;
1da177e4
LT		 509 if (!*p)
510 continue;
511
512 token = match_token(p, tokens, args);
cb00ea35
CG		 513 switch (token) {
514 case Opt_novrs:
515 uopt->novrs = 1;
4136801a 516 break;
cb00ea35
CG		 517 case Opt_bs:
518 if (match_int(&args[0], &option))
519 return 0;
8c6915ae
FF		 520 n = option;
521 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
522 return 0;
523 uopt->blocksize = n;
1197e4df 524 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 525 break;
526 case Opt_unhide:
527 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
528 break;
529 case Opt_undelete:
530 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
531 break;
532 case Opt_noadinicb:
533 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
534 break;
535 case Opt_adinicb:
536 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
537 break;
538 case Opt_shortad:
539 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
540 break;
541 case Opt_longad:
542 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
543 break;
544 case Opt_gid:
545 if (match_int(args, &option))
546 return 0;
c2ba138a
EB		 547 uopt->gid = make_kgid(current_user_ns(), option);
548 if (!gid_valid(uopt->gid))
549 return 0;
ca76d2d8 550 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 551 break;
552 case Opt_uid:
553 if (match_int(args, &option))
554 return 0;
c2ba138a
EB		 555 uopt->uid = make_kuid(current_user_ns(), option);
556 if (!uid_valid(uopt->uid))
557 return 0;
ca76d2d8 558 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 559 break;
560 case Opt_umask:
561 if (match_octal(args, &option))
562 return 0;
563 uopt->umask = option;
564 break;
565 case Opt_nostrict:
566 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
567 break;
568 case Opt_session:
569 if (match_int(args, &option))
570 return 0;
571 uopt->session = option;
6da80894
MS		 572 if (!remount)
573 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 574 break;
575 case Opt_lastblock:
576 if (match_int(args, &option))
577 return 0;
578 uopt->lastblock = option;
6da80894
MS		 579 if (!remount)
580 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 581 break;
582 case Opt_anchor:
583 if (match_int(args, &option))
584 return 0;
585 uopt->anchor = option;
586 break;
587 case Opt_volume:
588 if (match_int(args, &option))
589 return 0;
590 uopt->volume = option;
591 break;
592 case Opt_partition:
593 if (match_int(args, &option))
594 return 0;
595 uopt->partition = option;
596 break;
597 case Opt_fileset:
598 if (match_int(args, &option))
599 return 0;
600 uopt->fileset = option;
601 break;
602 case Opt_rootdir:
603 if (match_int(args, &option))
604 return 0;
605 uopt->rootdir = option;
606 break;
607 case Opt_utf8:
608 uopt->flags |= (1 << UDF_FLAG_UTF8);
609 break;
1da177e4 610#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 611 case Opt_iocharset:
612 uopt->nls_map = load_nls(args[0].from);
613 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
614 break;
1da177e4 615#endif
cb00ea35
CG		 616 case Opt_uignore:
617 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
618 break;
619 case Opt_uforget:
620 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
621 break;
622 case Opt_gignore:
623 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
624 break;
625 case Opt_gforget:
626 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
627 break;
7ac9bcd5
MS		 628 case Opt_fmode:
629 if (match_octal(args, &option))
630 return 0;
631 uopt->fmode = option & 0777;
632 break;
633 case Opt_dmode:
634 if (match_octal(args, &option))
635 return 0;
636 uopt->dmode = option & 0777;
637 break;
cb00ea35 638 default:
78ace70c 639 pr_err("bad mount option \"%s\" or missing value\n", p);
1da177e4
LT		 640 return 0;
641 }
642 }
643 return 1;
644}
645
cb00ea35 646static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 647{
648 struct udf_options uopt;
6c79e987 649 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 650 int error = 0;
69d75671 651 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
1da177e4 652
02b9984d 653 sync_filesystem(sb);
69d75671
JK		 654 if (lvidiu) {
655 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
e729eac6
JK		 656 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
657 return -EACCES;
658 }
659
6c79e987
MS		 660 uopt.flags = sbi->s_flags;
661 uopt.uid = sbi->s_uid;
662 uopt.gid = sbi->s_gid;
663 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 664 uopt.fmode = sbi->s_fmode;
665 uopt.dmode = sbi->s_dmode;
1da177e4 666
6da80894 667 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 668 return -EINVAL;
669
c03cad24 670 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 671 sbi->s_flags = uopt.flags;
672 sbi->s_uid = uopt.uid;
673 sbi->s_gid = uopt.gid;
674 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 675 sbi->s_fmode = uopt.fmode;
676 sbi->s_dmode = uopt.dmode;
c03cad24 677 write_unlock(&sbi->s_cred_lock);
1da177e4 678
c79d967d
CH		 679 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
680 goto out_unlock;
681
36350462 682 if (*flags & MS_RDONLY)
1da177e4 683 udf_close_lvid(sb);
36350462 684 else
1da177e4
LT		 685 udf_open_lvid(sb);
686
c79d967d 687out_unlock:
c79d967d 688 return error;
1da177e4
LT		 689}
690
40346005
JK		 691/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
692/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
693static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 694{
695 struct volStructDesc *vsd = NULL;
44499602 696 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
1da177e4
LT		 697 int sectorsize;
698 struct buffer_head *bh = NULL;
cb00ea35
CG		 699 int nsr02 = 0;
700 int nsr03 = 0;
6c79e987 701 struct udf_sb_info *sbi;
1da177e4 702
6c79e987 703 sbi = UDF_SB(sb);
1da177e4
LT		 704 if (sb->s_blocksize < sizeof(struct volStructDesc))
705 sectorsize = sizeof(struct volStructDesc);
706 else
707 sectorsize = sb->s_blocksize;
708
6c79e987 709 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 710
711 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 712 (unsigned int)(sector >> sb->s_blocksize_bits),
713 sb->s_blocksize);
44499602
PF		 714 /* Process the sequence (if applicable). The hard limit on the sector
715 * offset is arbitrary, hopefully large enough so that all valid UDF
716 * filesystems will be recognised. There is no mention of an upper
717 * bound to the size of the volume recognition area in the standard.
718 * The limit will prevent the code to read all the sectors of a
719 * specially crafted image (like a bluray disc full of CD001 sectors),
720 * potentially causing minutes or even hours of uninterruptible I/O
721 * activity. This actually happened with uninitialised SSD partitions
722 * (all 0xFF) before the check for the limit and all valid IDs were
723 * added */
724 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
725 sector += sectorsize) {
1da177e4
LT		 726 /* Read a block */
727 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
728 if (!bh)
729 break;
730
731 /* Look for ISO descriptors */
732 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 733 (sector & (sb->s_blocksize - 1)));
1da177e4 734
44499602 735 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
3a71fc5d 736 VSD_STD_ID_LEN)) {
cb00ea35
CG		 737 switch (vsd->structType) {
738 case 0:
739 udf_debug("ISO9660 Boot Record found\n");
740 break;
741 case 1:
a983f368 742 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 743 break;
744 case 2:
a983f368 745 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 746 break;
747 case 3:
a983f368 748 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 749 break;
750 case 255:
a983f368 751 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 752 break;
753 default:
754 udf_debug("ISO9660 VRS (%u) found\n",
755 vsd->structType);
756 break;
1da177e4 757 }
3a71fc5d
MS		 758 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
759 VSD_STD_ID_LEN))
760 ; /* nothing */
761 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
762 VSD_STD_ID_LEN)) {
3bf25cb4 763 brelse(bh);
1da177e4 764 break;
3a71fc5d
MS		 765 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
766 VSD_STD_ID_LEN))
1da177e4 767 nsr02 = sector;
3a71fc5d
MS		 768 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
769 VSD_STD_ID_LEN))
1da177e4 770 nsr03 = sector;
44499602
PF		 771 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
772 VSD_STD_ID_LEN))
773 ; /* nothing */
774 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
775 VSD_STD_ID_LEN))
776 ; /* nothing */
777 else {
778 /* invalid id : end of volume recognition area */
779 brelse(bh);
780 break;
781 }
3bf25cb4 782 brelse(bh);
1da177e4
LT		 783 }
784
785 if (nsr03)
786 return nsr03;
787 else if (nsr02)
788 return nsr02;
44499602
PF		 789 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
790 VSD_FIRST_SECTOR_OFFSET)
1da177e4
LT		 791 return -1;
792 else
793 return 0;
794}
795
3a71fc5d 796static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 797 struct kernel_lb_addr *fileset,
798 struct kernel_lb_addr *root)
1da177e4
LT		 799{
800 struct buffer_head *bh = NULL;
801 long lastblock;
802 uint16_t ident;
6c79e987 803 struct udf_sb_info *sbi;
1da177e4
LT		 804
805 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 806 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 807 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 808
28de7948 809 if (!bh) {
1da177e4 810 return 1;
28de7948 811 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 812 brelse(bh);
1da177e4
LT		 813 return 1;
814 }
cb00ea35 815
1da177e4
LT		 816 }
817
6c79e987 818 sbi = UDF_SB(sb);
3a71fc5d
MS		 819 if (!bh) {
820 /* Search backwards through the partitions */
5ca4e4be 821 struct kernel_lb_addr newfileset;
1da177e4 822
28de7948 823/* --> cvg: FIXME - is it reasonable? */
1da177e4 824 return 1;
cb00ea35 825
6c79e987 826 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 827 (newfileset.partitionReferenceNum != 0xFFFF &&
828 fileset->logicalBlockNum == 0xFFFFFFFF &&
829 fileset->partitionReferenceNum == 0xFFFF);
830 newfileset.partitionReferenceNum--) {
6c79e987
MS		 831 lastblock = sbi->s_partmaps
832 [newfileset.partitionReferenceNum]
833 .s_partition_len;
1da177e4
LT		 834 newfileset.logicalBlockNum = 0;
835
cb00ea35 836 do {
97e961fd 837 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 838 &ident);
cb00ea35
CG		 839 if (!bh) {
840 newfileset.logicalBlockNum++;
1da177e4
LT		 841 continue;
842 }
843
cb00ea35
CG		 844 switch (ident) {
845 case TAG_IDENT_SBD:
28de7948
CG		 846 {
847 struct spaceBitmapDesc *sp;
4b11111a
MS		 848 sp = (struct spaceBitmapDesc *)
849 bh->b_data;
28de7948
CG		 850 newfileset.logicalBlockNum += 1 +
851 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 852 sizeof(struct spaceBitmapDesc)
853 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 854 brelse(bh);
855 break;
856 }
cb00ea35 857 case TAG_IDENT_FSD:
28de7948
CG		 858 *fileset = newfileset;
859 break;
cb00ea35 860 default:
28de7948
CG		 861 newfileset.logicalBlockNum++;
862 brelse(bh);
863 bh = NULL;
864 break;
1da177e4 865 }
28de7948
CG		 866 } while (newfileset.logicalBlockNum < lastblock &&
867 fileset->logicalBlockNum == 0xFFFFFFFF &&
868 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 869 }
870 }
871
872 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 873 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 874 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 875 fileset->logicalBlockNum,
876 fileset->partitionReferenceNum);
1da177e4 877
6c79e987 878 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 879 udf_load_fileset(sb, bh, root);
3bf25cb4 880 brelse(bh);
1da177e4
LT		 881 return 0;
882 }
883 return 1;
884}
885
d759bfa4
JK		 886/*
887 * Load primary Volume Descriptor Sequence
888 *
889 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
890 * should be tried.
891 */
c0eb31ed 892static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 893{
894 struct primaryVolDesc *pvoldesc;
ba9aadd8 895 struct ustr *instr, *outstr;
c0eb31ed
JK		 896 struct buffer_head *bh;
897 uint16_t ident;
d759bfa4 898 int ret = -ENOMEM;
ba9aadd8
MS		 899
900 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
901 if (!instr)
d759bfa4 902 return -ENOMEM;
ba9aadd8
MS		 903
904 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
905 if (!outstr)
906 goto out1;
c0eb31ed
JK		 907
908 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 909 if (!bh) {
910 ret = -EAGAIN;
ba9aadd8 911 goto out2;
d759bfa4 912 }
ba9aadd8 913
d759bfa4
JK		 914 if (ident != TAG_IDENT_PVD) {
915 ret = -EIO;
916 goto out_bh;
917 }
1da177e4
LT		 918
919 pvoldesc = (struct primaryVolDesc *)bh->b_data;
920
56774805
MS		 921 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
922 pvoldesc->recordingDateAndTime)) {
af15a298 923#ifdef UDFFS_DEBUG
5ca4e4be 924 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 925 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 926 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
927 ts->minute, le16_to_cpu(ts->typeAndTimezone));
928#endif
1da177e4
LT		 929 }
930
ba9aadd8
MS		 931 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
932 if (udf_CS0toUTF8(outstr, instr)) {
933 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
934 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a 935 udf_debug("volIdent[] = '%s'\n",
a983f368 936 UDF_SB(sb)->s_volume_ident);
1da177e4 937 }
1da177e4 938
ba9aadd8
MS		 939 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
940 if (udf_CS0toUTF8(outstr, instr))
941 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed 942
ba9aadd8 943 ret = 0;
d759bfa4
JK		 944out_bh:
945 brelse(bh);
ba9aadd8
MS		 946out2:
947 kfree(outstr);
948out1:
949 kfree(instr);
950 return ret;
1da177e4
LT		 951}
952
3080a74e
NJ		 953struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
954 u32 meta_file_loc, u32 partition_num)
955{
956 struct kernel_lb_addr addr;
957 struct inode *metadata_fe;
958
959 addr.logicalBlockNum = meta_file_loc;
960 addr.partitionReferenceNum = partition_num;
961
962 metadata_fe = udf_iget(sb, &addr);
963
964 if (metadata_fe == NULL)
965 udf_warn(sb, "metadata inode efe not found\n");
966 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
967 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
968 iput(metadata_fe);
969 metadata_fe = NULL;
970 }
971
972 return metadata_fe;
973}
974
bfb257a5
JK		 975static int udf_load_metadata_files(struct super_block *sb, int partition)
976{
977 struct udf_sb_info *sbi = UDF_SB(sb);
978 struct udf_part_map *map;
979 struct udf_meta_data *mdata;
5ca4e4be 980 struct kernel_lb_addr addr;
bfb257a5
JK		 981
982 map = &sbi->s_partmaps[partition];
983 mdata = &map->s_type_specific.s_metadata;
984
985 /* metadata address */
bfb257a5 986 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 987 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 988
3080a74e
NJ		 989 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
990 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5
JK		 991
992 if (mdata->s_metadata_fe == NULL) {
3080a74e
NJ		 993 /* mirror file entry */
994 udf_debug("Mirror metadata file location: block = %d part = %d\n",
995 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 996
3080a74e
NJ		 997 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
998 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 999
3080a74e
NJ		 1000 if (mdata->s_mirror_fe == NULL) {
1001 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
d759bfa4 1002 return -EIO;
3080a74e 1003 }
bfb257a5
JK		 1004 }
1005
1006 /*
1007 * bitmap file entry
1008 * Note:
1009 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1010 */
1011 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1012 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1013 addr.partitionReferenceNum = map->s_partition_num;
1014
1015 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 1016 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 1017
97e961fd 1018 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 1019 if (mdata->s_bitmap_fe == NULL) {
1020 if (sb->s_flags & MS_RDONLY)
a40ecd7b 1021 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 1022 else {
8076c363 1023 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
d759bfa4 1024 return -EIO;
bfb257a5
JK		 1025 }
1026 }
1027 }
1028
1029 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 1030 return 0;
bfb257a5
JK		 1031}
1032
28de7948 1033static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1034 struct kernel_lb_addr *root)
1da177e4
LT		 1035{
1036 struct fileSetDesc *fset;
1037
1038 fset = (struct fileSetDesc *)bh->b_data;
1039
1040 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1041
6c79e987 1042 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1043
cb00ea35
CG		 1044 udf_debug("Rootdir at block=%d, partition=%d\n",
1045 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1046}
1047
883cb9d1
MS		 1048int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1049{
1050 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1051 return DIV_ROUND_UP(map->s_partition_len +
1052 (sizeof(struct spaceBitmapDesc) << 3),
1053 sb->s_blocksize * 8);
883cb9d1
MS		 1054}
1055
66e1da3f
MS		 1056static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1057{
66e1da3f
MS		 1058 struct udf_bitmap *bitmap;
1059 int nr_groups;
1060 int size;
1061
883cb9d1 1062 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1063 size = sizeof(struct udf_bitmap) +
1064 (sizeof(struct buffer_head *) * nr_groups);
1065
1066 if (size <= PAGE_SIZE)
ed2ae6f6 1067 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1068 else
ed2ae6f6 1069 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1070
75b09e02 1071 if (bitmap == NULL)
66e1da3f 1072 return NULL;
66e1da3f 1073
66e1da3f
MS		 1074 bitmap->s_nr_groups = nr_groups;
1075 return bitmap;
1076}
1077
3fb38dfa
JK		 1078static int udf_fill_partdesc_info(struct super_block *sb,
1079 struct partitionDesc *p, int p_index)
1da177e4 1080{
6c79e987 1081 struct udf_part_map *map;
165923fa 1082 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1083 struct partitionHeaderDesc *phd;
165923fa 1084
3fb38dfa 1085 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1086
1087 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1088 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1089
1090 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1091 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1092 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1093 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1094 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1095 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1096 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1097 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1098
a983f368
JP		 1099 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1100 p_index, map->s_partition_type,
1101 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1102
1103 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1104 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1105 return 0;
165923fa
MS		 1106
1107 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1108 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1109 struct kernel_lb_addr loc = {
165923fa
MS		 1110 .logicalBlockNum = le32_to_cpu(
1111 phd->unallocSpaceTable.extPosition),
3fb38dfa 1112 .partitionReferenceNum = p_index,
165923fa
MS		 1113 };
1114
97e961fd 1115 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1116 if (!map->s_uspace.s_table) {
1117 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1118 p_index);
d759bfa4 1119 return -EIO;
165923fa
MS		 1120 }
1121 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1122 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1123 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1124 }
1125
1126 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1127 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1128 if (!bitmap)
d759bfa4 1129 return -ENOMEM;
165923fa 1130 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1131 bitmap->s_extPosition = le32_to_cpu(
165923fa 1132 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1133 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1134 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1135 p_index, bitmap->s_extPosition);
165923fa
MS		 1136 }
1137
1138 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1139 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1140
1141 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1142 struct kernel_lb_addr loc = {
165923fa
MS		 1143 .logicalBlockNum = le32_to_cpu(
1144 phd->freedSpaceTable.extPosition),
3fb38dfa 1145 .partitionReferenceNum = p_index,
165923fa
MS		 1146 };
1147
97e961fd 1148 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1149 if (!map->s_fspace.s_table) {
3fb38dfa 1150 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1151 p_index);
d759bfa4 1152 return -EIO;
165923fa
MS		 1153 }
1154
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;
e971b0b9
JK		 1181
1182 /*
1183 * VAT file entry is in the last recorded block. Some broken disks have
1184 * it a few blocks before so try a bit harder...
1185 */
1186 ino.partitionReferenceNum = type1_index;
1187 for (vat_block = start_block;
1188 vat_block >= map->s_partition_root &&
1189 vat_block >= start_block - 3 &&
1190 !sbi->s_vat_inode; vat_block--) {
1191 ino.logicalBlockNum = vat_block - map->s_partition_root;
1192 sbi->s_vat_inode = udf_iget(sb, &ino);
1193 }
1194}
1195
1196static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1197{
1198 struct udf_sb_info *sbi = UDF_SB(sb);
1199 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1200 struct buffer_head *bh = NULL;
1201 struct udf_inode_info *vati;
1202 uint32_t pos;
1203 struct virtualAllocationTable20 *vat20;
4bf17af0 1204 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1205
e971b0b9 1206 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1207 if (!sbi->s_vat_inode &&
1208 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1209 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1210 (unsigned long)sbi->s_last_block,
1211 (unsigned long)blocks - 1);
e971b0b9 1212 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1213 }
38b74a53 1214 if (!sbi->s_vat_inode)
d759bfa4 1215 return -EIO;
38b74a53
JK		 1216
1217 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1218 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1219 map->s_type_specific.s_virtual.s_num_entries =
1220 (sbi->s_vat_inode->i_size - 36) >> 2;
1221 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1222 vati = UDF_I(sbi->s_vat_inode);
1223 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1224 pos = udf_block_map(sbi->s_vat_inode, 0);
1225 bh = sb_bread(sb, pos);
1226 if (!bh)
d759bfa4 1227 return -EIO;
fa5e0815
JK		 1228 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1229 } else {
1230 vat20 = (struct virtualAllocationTable20 *)
1231 vati->i_ext.i_data;
1232 }
38b74a53 1233
38b74a53 1234 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1235 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1236 map->s_type_specific.s_virtual.s_num_entries =
1237 (sbi->s_vat_inode->i_size -
1238 map->s_type_specific.s_virtual.
1239 s_start_offset) >> 2;
1240 brelse(bh);
1241 }
1242 return 0;
1243}
1244
d759bfa4
JK		 1245/*
1246 * Load partition descriptor block
1247 *
1248 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1249 * sequence.
1250 */
3fb38dfa
JK		 1251static int udf_load_partdesc(struct super_block *sb, sector_t block)
1252{
1253 struct buffer_head *bh;
1254 struct partitionDesc *p;
1255 struct udf_part_map *map;
1256 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1257 int i, type1_idx;
3fb38dfa
JK		 1258 uint16_t partitionNumber;
1259 uint16_t ident;
d759bfa4 1260 int ret;
3fb38dfa
JK		 1261
1262 bh = udf_read_tagged(sb, block, block, &ident);
1263 if (!bh)
d759bfa4
JK		 1264 return -EAGAIN;
1265 if (ident != TAG_IDENT_PD) {
1266 ret = 0;
3fb38dfa 1267 goto out_bh;
d759bfa4 1268 }
3fb38dfa
JK		 1269
1270 p = (struct partitionDesc *)bh->b_data;
1271 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1272
bfb257a5 1273 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1274 for (i = 0; i < sbi->s_partitions; i++) {
1275 map = &sbi->s_partmaps[i];
1276 udf_debug("Searching map: (%d == %d)\n",
1277 map->s_partition_num, partitionNumber);
38b74a53
JK		 1278 if (map->s_partition_num == partitionNumber &&
1279 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1280 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1281 break;
1282 }
1283
38b74a53 1284 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1285 udf_debug("Partition (%d) not found in partition map\n",
1286 partitionNumber);
d759bfa4 1287 ret = 0;
3fb38dfa
JK		 1288 goto out_bh;
1289 }
165923fa 1290
3fb38dfa 1291 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1292 if (ret < 0)
1293 goto out_bh;
38b74a53
JK		 1294
1295 /*
bfb257a5
JK		 1296 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1297 * PHYSICAL partitions are already set up
38b74a53
JK		 1298 */
1299 type1_idx = i;
44499602
PF		 1300#ifdef UDFFS_DEBUG
1301 map = NULL; /* supress 'maybe used uninitialized' warning */
1302#endif
38b74a53
JK		 1303 for (i = 0; i < sbi->s_partitions; i++) {
1304 map = &sbi->s_partmaps[i];
1305
1306 if (map->s_partition_num == partitionNumber &&
1307 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1308 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1309 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1310 break;
1311 }
1312
d759bfa4
JK		 1313 if (i >= sbi->s_partitions) {
1314 ret = 0;
38b74a53 1315 goto out_bh;
d759bfa4 1316 }
38b74a53
JK		 1317
1318 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1319 if (ret < 0)
38b74a53
JK		 1320 goto out_bh;
1321
bfb257a5
JK		 1322 if (map->s_partition_type == UDF_METADATA_MAP25) {
1323 ret = udf_load_metadata_files(sb, i);
d759bfa4 1324 if (ret < 0) {
78ace70c
JP		 1325 udf_err(sb, "error loading MetaData partition map %d\n",
1326 i);
bfb257a5
JK		 1327 goto out_bh;
1328 }
1329 } else {
e729eac6
JK		 1330 /*
1331 * If we have a partition with virtual map, we don't handle
1332 * writing to it (we overwrite blocks instead of relocating
1333 * them).
1334 */
1335 if (!(sb->s_flags & MS_RDONLY)) {
1336 ret = -EACCES;
1337 goto out_bh;
1338 }
bfb257a5 1339 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1340 if (ret < 0)
bfb257a5 1341 goto out_bh;
bfb257a5 1342 }
d759bfa4 1343 ret = 0;
c0eb31ed 1344out_bh:
2e0838fd 1345 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1346 brelse(bh);
1347 return ret;
1da177e4
LT		 1348}
1349
1df2ae31
JK		 1350static int udf_load_sparable_map(struct super_block *sb,
1351 struct udf_part_map *map,
1352 struct sparablePartitionMap *spm)
1353{
1354 uint32_t loc;
1355 uint16_t ident;
1356 struct sparingTable *st;
1357 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1358 int i;
1359 struct buffer_head *bh;
1360
1361 map->s_partition_type = UDF_SPARABLE_MAP15;
1362 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1363 if (!is_power_of_2(sdata->s_packet_len)) {
1364 udf_err(sb, "error loading logical volume descriptor: "
1365 "Invalid packet length %u\n",
1366 (unsigned)sdata->s_packet_len);
1367 return -EIO;
1368 }
1369 if (spm->numSparingTables > 4) {
1370 udf_err(sb, "error loading logical volume descriptor: "
1371 "Too many sparing tables (%d)\n",
1372 (int)spm->numSparingTables);
1373 return -EIO;
1374 }
1375
1376 for (i = 0; i < spm->numSparingTables; i++) {
1377 loc = le32_to_cpu(spm->locSparingTable[i]);
1378 bh = udf_read_tagged(sb, loc, loc, &ident);
1379 if (!bh)
1380 continue;
1381
1382 st = (struct sparingTable *)bh->b_data;
1383 if (ident != 0 ||
1384 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1385 strlen(UDF_ID_SPARING)) ||
1386 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1387 sb->s_blocksize) {
1388 brelse(bh);
1389 continue;
1390 }
1391
1392 sdata->s_spar_map[i] = bh;
1393 }
1394 map->s_partition_func = udf_get_pblock_spar15;
1395 return 0;
1396}
1397
c0eb31ed 1398static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1399 struct kernel_lb_addr *fileset)
1da177e4
LT		 1400{
1401 struct logicalVolDesc *lvd;
1df2ae31 1402 int i, offset;
1da177e4 1403 uint8_t type;
6c79e987 1404 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1405 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1406 uint16_t ident;
1407 struct buffer_head *bh;
adee11b2 1408 unsigned int table_len;
d759bfa4 1409 int ret;
1da177e4 1410
c0eb31ed
JK		 1411 bh = udf_read_tagged(sb, block, block, &ident);
1412 if (!bh)
d759bfa4 1413 return -EAGAIN;
c0eb31ed 1414 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1415 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1416 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1417 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1418 udf_err(sb, "error loading logical volume descriptor: "
1419 "Partition table too long (%u > %lu)\n", table_len,
1420 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1421 ret = -EIO;
adee11b2
JK		 1422 goto out_bh;
1423 }
1da177e4 1424
cb14d340
JK		 1425 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1426 if (ret)
c0eb31ed 1427 goto out_bh;
1da177e4 1428
cb00ea35 1429 for (i = 0, offset = 0;
adee11b2 1430 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1431 i++, offset += gpm->partitionMapLength) {
1432 struct udf_part_map *map = &sbi->s_partmaps[i];
1433 gpm = (struct genericPartitionMap *)
1434 &(lvd->partitionMaps[offset]);
1435 type = gpm->partitionMapType;
cb00ea35 1436 if (type == 1) {
4b11111a
MS		 1437 struct genericPartitionMap1 *gpm1 =
1438 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1439 map->s_partition_type = UDF_TYPE1_MAP15;
1440 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1441 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1442 map->s_partition_func = NULL;
cb00ea35 1443 } else if (type == 2) {
4b11111a
MS		 1444 struct udfPartitionMap2 *upm2 =
1445 (struct udfPartitionMap2 *)gpm;
1446 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1447 strlen(UDF_ID_VIRTUAL))) {
1448 u16 suf =
1449 le16_to_cpu(((__le16 *)upm2->partIdent.
1450 identSuffix)[0]);
c82a1275 1451 if (suf < 0x0200) {
4b11111a
MS		 1452 map->s_partition_type =
1453 UDF_VIRTUAL_MAP15;
1454 map->s_partition_func =
1455 udf_get_pblock_virt15;
c82a1275 1456 } else {
4b11111a
MS		 1457 map->s_partition_type =
1458 UDF_VIRTUAL_MAP20;
1459 map->s_partition_func =
1460 udf_get_pblock_virt20;
1da177e4 1461 }
4b11111a
MS		 1462 } else if (!strncmp(upm2->partIdent.ident,
1463 UDF_ID_SPARABLE,
1464 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1465 ret = udf_load_sparable_map(sb, map,
1466 (struct sparablePartitionMap *)gpm);
1467 if (ret < 0)
1df2ae31 1468 goto out_bh;
bfb257a5
JK		 1469 } else if (!strncmp(upm2->partIdent.ident,
1470 UDF_ID_METADATA,
1471 strlen(UDF_ID_METADATA))) {
1472 struct udf_meta_data *mdata =
1473 &map->s_type_specific.s_metadata;
1474 struct metadataPartitionMap *mdm =
1475 (struct metadataPartitionMap *)
1476 &(lvd->partitionMaps[offset]);
a983f368
JP		 1477 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1478 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1479
1480 map->s_partition_type = UDF_METADATA_MAP25;
1481 map->s_partition_func = udf_get_pblock_meta25;
1482
1483 mdata->s_meta_file_loc =
1484 le32_to_cpu(mdm->metadataFileLoc);
1485 mdata->s_mirror_file_loc =
1486 le32_to_cpu(mdm->metadataMirrorFileLoc);
1487 mdata->s_bitmap_file_loc =
1488 le32_to_cpu(mdm->metadataBitmapFileLoc);
1489 mdata->s_alloc_unit_size =
1490 le32_to_cpu(mdm->allocUnitSize);
1491 mdata->s_align_unit_size =
1492 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1493 if (mdm->flags & 0x01)
1494 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1495
1496 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1497 le16_to_cpu(*(__le16 *)
1498 mdm->partIdent.identSuffix));
bfb257a5 1499 udf_debug("Metadata part num=%d\n",
a983f368 1500 le16_to_cpu(mdm->partitionNum));
bfb257a5 1501 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1502 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1503 udf_debug("Metadata file loc=%d\n",
a983f368 1504 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1505 udf_debug("Mirror file loc=%d\n",
a983f368 1506 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1507 udf_debug("Bitmap file loc=%d\n",
a983f368 1508 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1509 udf_debug("Flags: %d %d\n",
1510 mdata->s_flags, mdm->flags);
cb00ea35 1511 } else {
3a71fc5d
MS		 1512 udf_debug("Unknown ident: %s\n",
1513 upm2->partIdent.ident);
1da177e4
LT		 1514 continue;
1515 }
6c79e987
MS		 1516 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1517 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1518 }
1519 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1520 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1521 }
1522
cb00ea35 1523 if (fileset) {
5ca4e4be 1524 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1525
1526 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1527 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1528 fileset->logicalBlockNum,
28de7948 1529 fileset->partitionReferenceNum);
1da177e4
LT		 1530 }
1531 if (lvd->integritySeqExt.extLength)
1532 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1533 ret = 0;
c0eb31ed
JK		 1534out_bh:
1535 brelse(bh);
1536 return ret;
1da177e4
LT		 1537}
1538
1539/*
1540 * udf_load_logicalvolint
1541 *
1542 */
5ca4e4be 1543static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1544{
1545 struct buffer_head *bh = NULL;
1546 uint16_t ident;
6c79e987
MS		 1547 struct udf_sb_info *sbi = UDF_SB(sb);
1548 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1549
1550 while (loc.extLength > 0 &&
cb00ea35
CG		 1551 (bh = udf_read_tagged(sb, loc.extLocation,
1552 loc.extLocation, &ident)) &&
1553 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1554 sbi->s_lvid_bh = bh;
1555 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1556
6c79e987 1557 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1558 udf_load_logicalvolint(sb,
6c79e987 1559 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1560
6c79e987 1561 if (sbi->s_lvid_bh != bh)
3bf25cb4 1562 brelse(bh);
1da177e4 1563 loc.extLength -= sb->s_blocksize;
cb00ea35 1564 loc.extLocation++;
1da177e4 1565 }
6c79e987 1566 if (sbi->s_lvid_bh != bh)
3bf25cb4 1567 brelse(bh);
1da177e4
LT		 1568}
1569
1570/*
d759bfa4
JK		 1571 * Process a main/reserve volume descriptor sequence.
1572 * @block First block of first extent of the sequence.
1573 * @lastblock Lastblock of first extent of the sequence.
1574 * @fileset There we store extent containing root fileset
1da177e4 1575 *
d759bfa4
JK		 1576 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1577 * sequence
1da177e4 1578 */
d759bfa4
JK		 1579static noinline int udf_process_sequence(
1580 struct super_block *sb,
1581 sector_t block, sector_t lastblock,
1582 struct kernel_lb_addr *fileset)
1da177e4
LT		 1583{
1584 struct buffer_head *bh = NULL;
1585 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1586 struct udf_vds_record *curr;
1da177e4
LT		 1587 struct generic_desc *gd;
1588 struct volDescPtr *vdp;
cb00ea35 1589 int done = 0;
1da177e4
LT		 1590 uint32_t vdsn;
1591 uint16_t ident;
1592 long next_s = 0, next_e = 0;
d759bfa4 1593 int ret;
1da177e4
LT		 1594
1595 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1596
c0eb31ed
JK		 1597 /*
1598 * Read the main descriptor sequence and find which descriptors
1599 * are in it.
1600 */
cb00ea35 1601 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1602
1603 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1604 if (!bh) {
78ace70c
JP		 1605 udf_err(sb,
1606 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1607 (unsigned long long)block);
d759bfa4 1608 return -EAGAIN;
c0eb31ed 1609 }
1da177e4
LT		 1610
1611 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1612 gd = (struct generic_desc *)bh->b_data;
1613 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1614 switch (ident) {
28de7948 1615 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1616 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1617 if (vdsn >= curr->volDescSeqNum) {
1618 curr->volDescSeqNum = vdsn;
1619 curr->block = block;
cb00ea35
CG		 1620 }
1621 break;
28de7948 1622 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1623 curr = &vds[VDS_POS_VOL_DESC_PTR];
1624 if (vdsn >= curr->volDescSeqNum) {
1625 curr->volDescSeqNum = vdsn;
1626 curr->block = block;
cb00ea35
CG		 1627
1628 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1629 next_s = le32_to_cpu(
1630 vdp->nextVolDescSeqExt.extLocation);
1631 next_e = le32_to_cpu(
1632 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1633 next_e = next_e >> sb->s_blocksize_bits;
1634 next_e += next_s;
1635 }
1636 break;
28de7948 1637 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1638 curr = &vds[VDS_POS_IMP_USE_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_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1645 curr = &vds[VDS_POS_PARTITION_DESC];
1646 if (!curr->block)
1647 curr->block = block;
cb00ea35 1648 break;
28de7948 1649 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1650 curr = &vds[VDS_POS_LOGICAL_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_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1657 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1658 if (vdsn >= curr->volDescSeqNum) {
1659 curr->volDescSeqNum = vdsn;
1660 curr->block = block;
cb00ea35
CG		 1661 }
1662 break;
28de7948 1663 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1664 vds[VDS_POS_TERMINATING_DESC].block = block;
1665 if (next_e) {
1666 block = next_s;
1667 lastblock = next_e;
1668 next_s = next_e = 0;
4b11111a 1669 } else
cb00ea35
CG		 1670 done = 1;
1671 break;
1da177e4 1672 }
3bf25cb4 1673 brelse(bh);
1da177e4 1674 }
c0eb31ed
JK		 1675 /*
1676 * Now read interesting descriptors again and process them
1677 * in a suitable order
1678 */
1679 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1680 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1681 return -EAGAIN;
1682 }
1683 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1684 if (ret < 0)
1685 return ret;
1686
1687 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1688 ret = udf_load_logicalvol(sb,
1689 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1690 fileset);
1691 if (ret < 0)
1692 return ret;
c0eb31ed 1693 }
165923fa 1694
c0eb31ed
JK		 1695 if (vds[VDS_POS_PARTITION_DESC].block) {
1696 /*
1697 * We rescan the whole descriptor sequence to find
1698 * partition descriptor blocks and process them.
1699 */
1700 for (block = vds[VDS_POS_PARTITION_DESC].block;
1701 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1702 block++) {
1703 ret = udf_load_partdesc(sb, block);
1704 if (ret < 0)
1705 return ret;
1706 }
1da177e4
LT		 1707 }
1708
1709 return 0;
1710}
1711
d759bfa4
JK		 1712/*
1713 * Load Volume Descriptor Sequence described by anchor in bh
1714 *
1715 * Returns <0 on error, 0 on success
1716 */
40346005
JK		 1717static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1718 struct kernel_lb_addr *fileset)
1da177e4 1719{
40346005 1720 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1721 sector_t main_s, main_e, reserve_s, reserve_e;
1722 int ret;
1da177e4 1723
40346005
JK		 1724 anchor = (struct anchorVolDescPtr *)bh->b_data;
1725
1726 /* Locate the main sequence */
1727 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1728 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1729 main_e = main_e >> sb->s_blocksize_bits;
1730 main_e += main_s;
1731
1732 /* Locate the reserve sequence */
1733 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1734 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1735 reserve_e = reserve_e >> sb->s_blocksize_bits;
1736 reserve_e += reserve_s;
1737
1738 /* Process the main & reserve sequences */
1739 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1740 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1741 if (ret != -EAGAIN)
1742 return ret;
bff943af 1743 udf_sb_free_partitions(sb);
d759bfa4
JK		 1744 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1745 if (ret < 0) {
1746 udf_sb_free_partitions(sb);
1747 /* No sequence was OK, return -EIO */
1748 if (ret == -EAGAIN)
1749 ret = -EIO;
1750 }
1751 return ret;
1da177e4
LT		 1752}
1753
40346005
JK		 1754/*
1755 * Check whether there is an anchor block in the given block and
1756 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1757 *
1758 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1759 * block
40346005
JK		 1760 */
1761static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1762 struct kernel_lb_addr *fileset)
1197e4df 1763{
40346005
JK		 1764 struct buffer_head *bh;
1765 uint16_t ident;
1766 int ret;
1197e4df 1767
40346005
JK		 1768 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1769 udf_fixed_to_variable(block) >=
1770 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1771 return -EAGAIN;
40346005
JK		 1772
1773 bh = udf_read_tagged(sb, block, block, &ident);
1774 if (!bh)
d759bfa4 1775 return -EAGAIN;
40346005
JK		 1776 if (ident != TAG_IDENT_AVDP) {
1777 brelse(bh);
d759bfa4 1778 return -EAGAIN;
1197e4df 1779 }
40346005
JK		 1780 ret = udf_load_sequence(sb, bh, fileset);
1781 brelse(bh);
1782 return ret;
1197e4df
CL		 1783}
1784
d759bfa4
JK		 1785/*
1786 * Search for an anchor volume descriptor pointer.
1787 *
1788 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1789 * of anchors.
1790 */
1791static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1792 struct kernel_lb_addr *fileset)
1da177e4 1793{
40346005 1794 sector_t last[6];
38b74a53 1795 int i;
40346005
JK		 1796 struct udf_sb_info *sbi = UDF_SB(sb);
1797 int last_count = 0;
d759bfa4 1798 int ret;
1da177e4 1799
40346005
JK		 1800 /* First try user provided anchor */
1801 if (sbi->s_anchor) {
d759bfa4
JK		 1802 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1803 if (ret != -EAGAIN)
1804 return ret;
40346005
JK		 1805 }
1806 /*
1807 * according to spec, anchor is in either:
1808 * block 256
1809 * lastblock-256
1810 * lastblock
1811 * however, if the disc isn't closed, it could be 512.
1812 */
d759bfa4
JK		 1813 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1814 if (ret != -EAGAIN)
1815 return ret;
40346005
JK		 1816 /*
1817 * The trouble is which block is the last one. Drives often misreport
1818 * this so we try various possibilities.
1819 */
d759bfa4
JK		 1820 last[last_count++] = *lastblock;
1821 if (*lastblock >= 1)
1822 last[last_count++] = *lastblock - 1;
1823 last[last_count++] = *lastblock + 1;
1824 if (*lastblock >= 2)
1825 last[last_count++] = *lastblock - 2;
1826 if (*lastblock >= 150)
1827 last[last_count++] = *lastblock - 150;
1828 if (*lastblock >= 152)
1829 last[last_count++] = *lastblock - 152;
1da177e4 1830
40346005
JK		 1831 for (i = 0; i < last_count; i++) {
1832 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1833 sb->s_blocksize_bits)
28f7c4d4 1834 continue;
d759bfa4
JK		 1835 ret = udf_check_anchor_block(sb, last[i], fileset);
1836 if (ret != -EAGAIN) {
1837 if (!ret)
1838 *lastblock = last[i];
1839 return ret;
1840 }
40346005 1841 if (last[i] < 256)
28f7c4d4 1842 continue;
d759bfa4
JK		 1843 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1844 if (ret != -EAGAIN) {
1845 if (!ret)
1846 *lastblock = last[i];
1847 return ret;
1848 }
40346005 1849 }
28f7c4d4 1850
40346005 1851 /* Finally try block 512 in case media is open */
d759bfa4 1852 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1853}
28f7c4d4 1854
40346005
JK		 1855/*
1856 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1857 * area specified by it. The function expects sbi->s_lastblock to be the last
1858 * block on the media.
1859 *
d759bfa4
JK		 1860 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1861 * was not found.
40346005
JK		 1862 */
1863static int udf_find_anchor(struct super_block *sb,
1864 struct kernel_lb_addr *fileset)
1865{
40346005 1866 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1867 sector_t lastblock = sbi->s_last_block;
1868 int ret;
28f7c4d4 1869
d759bfa4
JK		 1870 ret = udf_scan_anchors(sb, &lastblock, fileset);
1871 if (ret != -EAGAIN)
40346005 1872 goto out;
1da177e4 1873
40346005
JK		 1874 /* No anchor found? Try VARCONV conversion of block numbers */
1875 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1876 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1877 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1878 ret = udf_scan_anchors(sb, &lastblock, fileset);
1879 if (ret != -EAGAIN)
40346005 1880 goto out;
1da177e4 1881
d759bfa4 1882 lastblock = sbi->s_last_block;
40346005 1883 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1884 ret = udf_scan_anchors(sb, &lastblock, fileset);
1885 if (ret < 0) {
40346005
JK		 1886 /* VARCONV didn't help. Clear it. */
1887 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1888 }
40346005 1889out:
d759bfa4
JK		 1890 if (ret == 0)
1891 sbi->s_last_block = lastblock;
1892 return ret;
40346005 1893}
1da177e4 1894
40346005
JK		 1895/*
1896 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1897 * Descriptor Sequence.
1898 *
1899 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1900 * block was not found.
40346005
JK		 1901 */
1902static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1903 int silent, struct kernel_lb_addr *fileset)
1904{
1905 struct udf_sb_info *sbi = UDF_SB(sb);
1906 loff_t nsr_off;
d759bfa4 1907 int ret;
40346005
JK		 1908
1909 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1910 if (!silent)
78ace70c 1911 udf_warn(sb, "Bad block size\n");
d759bfa4 1912 return -EINVAL;
40346005
JK		 1913 }
1914 sbi->s_last_block = uopt->lastblock;
1915 if (!uopt->novrs) {
1916 /* Check that it is NSR02 compliant */
1917 nsr_off = udf_check_vsd(sb);
1918 if (!nsr_off) {
1919 if (!silent)
78ace70c 1920 udf_warn(sb, "No VRS found\n");
40346005
JK		 1921 return 0;
1922 }
1923 if (nsr_off == -1)
44499602
PF		 1924 udf_debug("Failed to read sector at offset %d. "
1925 "Assuming open disc. Skipping validity "
1926 "check\n", VSD_FIRST_SECTOR_OFFSET);
40346005
JK		 1927 if (!sbi->s_last_block)
1928 sbi->s_last_block = udf_get_last_block(sb);
1929 } else {
1930 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1931 }
1da177e4 1932
40346005
JK		 1933 /* Look for anchor block and load Volume Descriptor Sequence */
1934 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1935 ret = udf_find_anchor(sb, fileset);
1936 if (ret < 0) {
1937 if (!silent && ret == -EAGAIN)
78ace70c 1938 udf_warn(sb, "No anchor found\n");
d759bfa4 1939 return ret;
40346005 1940 }
d759bfa4 1941 return 0;
1da177e4
LT		 1942}
1943
1944static void udf_open_lvid(struct super_block *sb)
1945{
6c79e987
MS		 1946 struct udf_sb_info *sbi = UDF_SB(sb);
1947 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1948 struct logicalVolIntegrityDesc *lvid;
1949 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1950
165923fa
MS		 1951 if (!bh)
1952 return;
165923fa 1953 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
69d75671
JK		 1954 lvidiu = udf_sb_lvidiu(sb);
1955 if (!lvidiu)
1956 return;
165923fa 1957
69d75671 1958 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1959 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1960 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1961 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1962 CURRENT_TIME);
146bca72 1963 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1964
1965 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1966 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1967 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1968
1969 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1970 mark_buffer_dirty(bh);
146bca72 1971 sbi->s_lvid_dirty = 0;
949f4a7c 1972 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1973 /* Make opening of filesystem visible on the media immediately */
1974 sync_dirty_buffer(bh);
1da177e4
LT		 1975}
1976
1977static void udf_close_lvid(struct super_block *sb)
1978{
6c79e987
MS		 1979 struct udf_sb_info *sbi = UDF_SB(sb);
1980 struct buffer_head *bh = sbi->s_lvid_bh;
1981 struct logicalVolIntegrityDesc *lvid;
165923fa 1982 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1983
6c79e987
MS		 1984 if (!bh)
1985 return;
69d75671
JK		 1986 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1987 lvidiu = udf_sb_lvidiu(sb);
1988 if (!lvidiu)
1989 return;
6c79e987 1990
949f4a7c 1991 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1992 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1993 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1994 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1995 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1996 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1997 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1998 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1999 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2000 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2001 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2002
2003 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 2004 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 2005 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 2006
2007 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 2008 /*
2009 * We set buffer uptodate unconditionally here to avoid spurious
2010 * warnings from mark_buffer_dirty() when previous EIO has marked
2011 * the buffer as !uptodate
2012 */
2013 set_buffer_uptodate(bh);
165923fa 2014 mark_buffer_dirty(bh);
146bca72 2015 sbi->s_lvid_dirty = 0;
949f4a7c 2016 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2017 /* Make closing of filesystem visible on the media immediately */
2018 sync_dirty_buffer(bh);
1da177e4
LT		 2019}
2020
d664b6af
JK		 2021u64 lvid_get_unique_id(struct super_block *sb)
2022{
2023 struct buffer_head *bh;
2024 struct udf_sb_info *sbi = UDF_SB(sb);
2025 struct logicalVolIntegrityDesc *lvid;
2026 struct logicalVolHeaderDesc *lvhd;
2027 u64 uniqueID;
2028 u64 ret;
2029
2030 bh = sbi->s_lvid_bh;
2031 if (!bh)
2032 return 0;
2033
2034 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2035 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2036
2037 mutex_lock(&sbi->s_alloc_mutex);
2038 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2039 if (!(++uniqueID & 0xFFFFFFFF))
2040 uniqueID += 16;
2041 lvhd->uniqueID = cpu_to_le64(uniqueID);
2042 mutex_unlock(&sbi->s_alloc_mutex);
2043 mark_buffer_dirty(bh);
2044
2045 return ret;
1da177e4
LT		 2046}
2047
1da177e4
LT		 2048static int udf_fill_super(struct super_block *sb, void *options, int silent)
2049{
d759bfa4 2050 int ret = -EINVAL;
cb00ea35 2051 struct inode *inode = NULL;
1da177e4 2052 struct udf_options uopt;
5ca4e4be 2053 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 2054 struct udf_sb_info *sbi;
2055
2056 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2057 uopt.uid = INVALID_UID;
2058 uopt.gid = INVALID_GID;
1da177e4 2059 uopt.umask = 0;
87bc730c
MS		 2060 uopt.fmode = UDF_INVALID_MODE;
2061 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2062
6c79e987 2063 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2064 if (!sbi)
1da177e4 2065 return -ENOMEM;
28de7948 2066
1da177e4 2067 sb->s_fs_info = sbi;
1da177e4 2068
1e7933de 2069 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2070
6da80894 2071 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 2072 goto error_out;
2073
2074 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2075 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2076 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 2077 goto error_out;
2078 }
2079#ifdef CONFIG_UDF_NLS
cb00ea35 2080 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2081 uopt.nls_map = load_nls_default();
2082 if (!uopt.nls_map)
2083 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2084 else
2085 udf_debug("Using default NLS map\n");
2086 }
2087#endif
2088 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2089 uopt.flags |= (1 << UDF_FLAG_UTF8);
2090
2091 fileset.logicalBlockNum = 0xFFFFFFFF;
2092 fileset.partitionReferenceNum = 0xFFFF;
2093
6c79e987
MS		 2094 sbi->s_flags = uopt.flags;
2095 sbi->s_uid = uopt.uid;
2096 sbi->s_gid = uopt.gid;
2097 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2098 sbi->s_fmode = uopt.fmode;
2099 sbi->s_dmode = uopt.dmode;
6c79e987 2100 sbi->s_nls_map = uopt.nls_map;
c03cad24 2101 rwlock_init(&sbi->s_cred_lock);
1da177e4 2102
cb00ea35 2103 if (uopt.session == 0xFFFFFFFF)
6c79e987 2104 sbi->s_session = udf_get_last_session(sb);
1da177e4 2105 else
6c79e987 2106 sbi->s_session = uopt.session;
1da177e4 2107
6c79e987 2108 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2109
40346005
JK		 2110 /* Fill in the rest of the superblock */
2111 sb->s_op = &udf_sb_ops;
2112 sb->s_export_op = &udf_export_ops;
123e9caf 2113
40346005
JK		 2114 sb->s_magic = UDF_SUPER_MAGIC;
2115 sb->s_time_gran = 1000;
2116
1197e4df 2117 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2118 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2119 } else {
e1defc4f 2120 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2121 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2122 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2123 if (!silent)
78ace70c
JP		 2124 pr_notice("Rescanning with blocksize %d\n",
2125 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2126 brelse(sbi->s_lvid_bh);
2127 sbi->s_lvid_bh = NULL;
1197e4df 2128 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2129 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2130 }
1da177e4 2131 }
d759bfa4
JK		 2132 if (ret < 0) {
2133 if (ret == -EAGAIN) {
2134 udf_warn(sb, "No partition found (1)\n");
2135 ret = -EINVAL;
2136 }
1da177e4
LT		 2137 goto error_out;
2138 }
2139
6c79e987 2140 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2141
6c79e987 2142 if (sbi->s_lvid_bh) {
4b11111a 2143 struct logicalVolIntegrityDescImpUse *lvidiu =
69d75671
JK		 2144 udf_sb_lvidiu(sb);
2145 uint16_t minUDFReadRev;
2146 uint16_t minUDFWriteRev;
1da177e4 2147
69d75671
JK		 2148 if (!lvidiu) {
2149 ret = -EINVAL;
2150 goto error_out;
2151 }
2152 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2153 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
cb00ea35 2154 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c 2155 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
69d75671 2156 minUDFReadRev,
78ace70c 2157 UDF_MAX_READ_VERSION);
d759bfa4 2158 ret = -EINVAL;
1da177e4 2159 goto error_out;
e729eac6
JK		 2160 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2161 !(sb->s_flags & MS_RDONLY)) {
2162 ret = -EACCES;
2163 goto error_out;
2164 }
1da177e4 2165
6c79e987 2166 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2167
2168 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2169 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2170 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2171 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2172 }
2173
6c79e987 2174 if (!sbi->s_partitions) {
78ace70c 2175 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2176 ret = -EINVAL;
1da177e4
LT		 2177 goto error_out;
2178 }
2179
4b11111a 2180 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
e729eac6
JK		 2181 UDF_PART_FLAG_READ_ONLY &&
2182 !(sb->s_flags & MS_RDONLY)) {
2183 ret = -EACCES;
2184 goto error_out;
c1a26e7d 2185 }
39b3f6d6 2186
cb00ea35 2187 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2188 udf_warn(sb, "No fileset found\n");
d759bfa4 2189 ret = -EINVAL;
1da177e4
LT		 2190 goto error_out;
2191 }
2192
cb00ea35 2193 if (!silent) {
5ca4e4be 2194 struct timestamp ts;
56774805 2195 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2196 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2197 sbi->s_volume_ident,
2198 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2199 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2200 }
2201 if (!(sb->s_flags & MS_RDONLY))
2202 udf_open_lvid(sb);
2203
2204 /* Assign the root inode */
2205 /* assign inodes by physical block number */
2206 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2207 inode = udf_iget(sb, &rootdir);
cb00ea35 2208 if (!inode) {
78ace70c 2209 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2210 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
d759bfa4 2211 ret = -EIO;
1da177e4
LT		 2212 goto error_out;
2213 }
2214
2215 /* Allocate a dentry for the root inode */
48fde701 2216 sb->s_root = d_make_root(inode);
cb00ea35 2217 if (!sb->s_root) {
78ace70c 2218 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2219 ret = -ENOMEM;
1da177e4
LT		 2220 goto error_out;
2221 }
31170b6a 2222 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2223 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2224 return 0;
2225
28de7948 2226error_out:
6c79e987
MS		 2227 if (sbi->s_vat_inode)
2228 iput(sbi->s_vat_inode);
1da177e4
LT		 2229#ifdef CONFIG_UDF_NLS
2230 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2231 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2232#endif
2233 if (!(sb->s_flags & MS_RDONLY))
2234 udf_close_lvid(sb);
6c79e987 2235 brelse(sbi->s_lvid_bh);
bff943af 2236 udf_sb_free_partitions(sb);
1da177e4
LT		 2237 kfree(sbi);
2238 sb->s_fs_info = NULL;
28de7948 2239
d759bfa4 2240 return ret;
1da177e4
LT		 2241}
2242
8076c363
JP		 2243void _udf_err(struct super_block *sb, const char *function,
2244 const char *fmt, ...)
1da177e4 2245{
c2bff36c 2246 struct va_format vaf;
1da177e4
LT		 2247 va_list args;
2248
1da177e4 2249 va_start(args, fmt);
c2bff36c
JP		 2250
2251 vaf.fmt = fmt;
2252 vaf.va = &args;
2253
2254 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2255
1da177e4 2256 va_end(args);
1da177e4
LT		 2257}
2258
a40ecd7b
JP		 2259void _udf_warn(struct super_block *sb, const char *function,
2260 const char *fmt, ...)
1da177e4 2261{
c2bff36c 2262 struct va_format vaf;
1da177e4
LT		 2263 va_list args;
2264
cb00ea35 2265 va_start(args, fmt);
c2bff36c
JP		 2266
2267 vaf.fmt = fmt;
2268 vaf.va = &args;
2269
2270 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2271
1da177e4 2272 va_end(args);
1da177e4
LT		 2273}
2274
cb00ea35 2275static void udf_put_super(struct super_block *sb)
1da177e4 2276{
6c79e987 2277 struct udf_sb_info *sbi;
1da177e4 2278
6c79e987 2279 sbi = UDF_SB(sb);
6cfd0148 2280
6c79e987
MS		 2281 if (sbi->s_vat_inode)
2282 iput(sbi->s_vat_inode);
1da177e4
LT		 2283#ifdef CONFIG_UDF_NLS
2284 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2285 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2286#endif
2287 if (!(sb->s_flags & MS_RDONLY))
2288 udf_close_lvid(sb);
6c79e987 2289 brelse(sbi->s_lvid_bh);
bff943af 2290 udf_sb_free_partitions(sb);
1da177e4
LT		 2291 kfree(sb->s_fs_info);
2292 sb->s_fs_info = NULL;
2293}
2294
146bca72
JK		 2295static int udf_sync_fs(struct super_block *sb, int wait)
2296{
2297 struct udf_sb_info *sbi = UDF_SB(sb);
2298
2299 mutex_lock(&sbi->s_alloc_mutex);
2300 if (sbi->s_lvid_dirty) {
2301 /*
2302 * Blockdevice will be synced later so we don't have to submit
2303 * the buffer for IO
2304 */
2305 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2306 sbi->s_lvid_dirty = 0;
2307 }
2308 mutex_unlock(&sbi->s_alloc_mutex);
2309
2310 return 0;
2311}
2312
cb00ea35 2313static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2314{
726c3342 2315 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2316 struct udf_sb_info *sbi = UDF_SB(sb);
2317 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2318 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987 2319
69d75671 2320 lvidiu = udf_sb_lvidiu(sb);
1da177e4
LT		 2321 buf->f_type = UDF_SUPER_MAGIC;
2322 buf->f_bsize = sb->s_blocksize;
6c79e987 2323 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2324 buf->f_bfree = udf_count_free(sb);
2325 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2326 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2327 le32_to_cpu(lvidiu->numDirs)) : 0)
2328 + buf->f_bfree;
1da177e4 2329 buf->f_ffree = buf->f_bfree;
cb00ea35 2330 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2331 buf->f_fsid.val[0] = (u32)id;
2332 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2333
2334 return 0;
2335}
2336
4b11111a
MS		 2337static unsigned int udf_count_free_bitmap(struct super_block *sb,
2338 struct udf_bitmap *bitmap)
1da177e4
LT		 2339{
2340 struct buffer_head *bh = NULL;
2341 unsigned int accum = 0;
2342 int index;
2343 int block = 0, newblock;
5ca4e4be 2344 struct kernel_lb_addr loc;
1da177e4 2345 uint32_t bytes;
1da177e4
LT		 2346 uint8_t *ptr;
2347 uint16_t ident;
2348 struct spaceBitmapDesc *bm;
2349
1da177e4 2350 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2351 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2352 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2353
cb00ea35 2354 if (!bh) {
78ace70c 2355 udf_err(sb, "udf_count_free failed\n");
1da177e4 2356 goto out;
cb00ea35 2357 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2358 brelse(bh);
78ace70c 2359 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2360 goto out;
2361 }
2362
2363 bm = (struct spaceBitmapDesc *)bh->b_data;
2364 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2365 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2366 ptr = (uint8_t *)bh->b_data;
1da177e4 2367
cb00ea35 2368 while (bytes > 0) {
01b954a3
MS		 2369 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2370 accum += bitmap_weight((const unsigned long *)(ptr + index),
2371 cur_bytes * 8);
2372 bytes -= cur_bytes;
cb00ea35 2373 if (bytes) {
3bf25cb4 2374 brelse(bh);
97e961fd 2375 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2376 bh = udf_tread(sb, newblock);
cb00ea35 2377 if (!bh) {
1da177e4
LT		 2378 udf_debug("read failed\n");
2379 goto out;
2380 }
2381 index = 0;
28de7948 2382 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2383 }
2384 }
3bf25cb4 2385 brelse(bh);
28de7948 2386out:
1da177e4
LT		 2387 return accum;
2388}
2389
4b11111a
MS		 2390static unsigned int udf_count_free_table(struct super_block *sb,
2391 struct inode *table)
1da177e4
LT		 2392{
2393 unsigned int accum = 0;
ff116fc8 2394 uint32_t elen;
5ca4e4be 2395 struct kernel_lb_addr eloc;
1da177e4 2396 int8_t etype;
ff116fc8 2397 struct extent_position epos;
1da177e4 2398
d1668fe3 2399 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2400 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2401 epos.offset = sizeof(struct unallocSpaceEntry);
2402 epos.bh = NULL;
1da177e4 2403
3a71fc5d 2404 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2405 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2406
3bf25cb4 2407 brelse(epos.bh);
d1668fe3 2408 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2409
2410 return accum;
2411}
cb00ea35
CG		 2412
2413static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2414{
2415 unsigned int accum = 0;
6c79e987
MS		 2416 struct udf_sb_info *sbi;
2417 struct udf_part_map *map;
1da177e4 2418
6c79e987
MS		 2419 sbi = UDF_SB(sb);
2420 if (sbi->s_lvid_bh) {
4b11111a
MS		 2421 struct logicalVolIntegrityDesc *lvid =
2422 (struct logicalVolIntegrityDesc *)
2423 sbi->s_lvid_bh->b_data;
6c79e987 2424 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2425 accum = le32_to_cpu(
2426 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2427 if (accum == 0xFFFFFFFF)
2428 accum = 0;
2429 }
2430 }
2431
2432 if (accum)
2433 return accum;
2434
6c79e987
MS		 2435 map = &sbi->s_partmaps[sbi->s_partition];
2436 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2437 accum += udf_count_free_bitmap(sb,
6c79e987 2438 map->s_uspace.s_bitmap);
1da177e4 2439 }
6c79e987 2440 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2441 accum += udf_count_free_bitmap(sb,
6c79e987 2442 map->s_fspace.s_bitmap);
1da177e4
LT		 2443 }
2444 if (accum)
2445 return accum;
2446
6c79e987 2447 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2448 accum += udf_count_free_table(sb,
6c79e987 2449 map->s_uspace.s_table);
1da177e4 2450 }
6c79e987 2451 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2452 accum += udf_count_free_table(sb,
6c79e987 2453 map->s_fspace.s_table);
1da177e4
LT		 2454 }
2455
2456 return accum;
2457}
Linux kernel - Deliverables
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