]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blame - fs/udf/super.c
projects / mirror_ubuntu-hirsute-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
udf: merge module informations in super.c
[mirror_ubuntu-hirsute-kernel.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
a47241cd
AT		 81/*
82 * Maximum number of Terminating Descriptor / Logical Volume Integrity
83 * Descriptor redirections. The chosen numbers are arbitrary - just that we
84 * hopefully don't limit any real use of rewritten inode on write-once media
85 * but avoid looping for too long on corrupted media.
86 */
87#define UDF_MAX_TD_NESTING 64
88#define UDF_MAX_LVID_NESTING 1000
89
8de52778
AV		 90enum { UDF_MAX_LINKS = 0xffff };
91
1da177e4
LT		 92/* These are the "meat" - everything else is stuffing */
93static int udf_fill_super(struct super_block *, void *, int);
94static void udf_put_super(struct super_block *);
146bca72 95static int udf_sync_fs(struct super_block *, int);
1da177e4 96static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 97static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 98static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
99 struct kernel_lb_addr *);
cb00ea35 100static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 101 struct kernel_lb_addr *);
1da177e4
LT		 102static void udf_open_lvid(struct super_block *);
103static void udf_close_lvid(struct super_block *);
104static unsigned int udf_count_free(struct super_block *);
726c3342 105static int udf_statfs(struct dentry *, struct kstatfs *);
34c80b1d 106static int udf_show_options(struct seq_file *, struct dentry *);
1da177e4 107
69d75671 108struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
6c79e987 109{
69d75671
JK		 110 struct logicalVolIntegrityDesc *lvid;
111 unsigned int partnum;
112 unsigned int offset;
113
114 if (!UDF_SB(sb)->s_lvid_bh)
115 return NULL;
116 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
117 partnum = le32_to_cpu(lvid->numOfPartitions);
118 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
119 offsetof(struct logicalVolIntegrityDesc, impUse)) /
120 (2 * sizeof(uint32_t)) < partnum) {
121 udf_err(sb, "Logical volume integrity descriptor corrupted "
122 "(numOfPartitions = %u)!\n", partnum);
123 return NULL;
124 }
125 /* The offset is to skip freeSpaceTable and sizeTable arrays */
126 offset = partnum * 2 * sizeof(uint32_t);
6c79e987
MS		 127 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
128}
129
1da177e4 130/* UDF filesystem type */
152a0836
AV		 131static struct dentry *udf_mount(struct file_system_type *fs_type,
132 int flags, const char *dev_name, void *data)
1da177e4 133{
152a0836 134 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 135}
136
137static struct file_system_type udf_fstype = {
28de7948
CG		 138 .owner = THIS_MODULE,
139 .name = "udf",
152a0836 140 .mount = udf_mount,
28de7948
CG		 141 .kill_sb = kill_block_super,
142 .fs_flags = FS_REQUIRES_DEV,
1da177e4 143};
3e64fe5b 144MODULE_ALIAS_FS("udf");
1da177e4 145
cb00ea35 146static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 147
148static struct inode *udf_alloc_inode(struct super_block *sb)
149{
150 struct udf_inode_info *ei;
3a71fc5d 151 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 152 if (!ei)
153 return NULL;
95f8797f
DB		 154
155 ei->i_unique = 0;
156 ei->i_lenExtents = 0;
157 ei->i_next_alloc_block = 0;
158 ei->i_next_alloc_goal = 0;
159 ei->i_strat4096 = 0;
4d0fb621 160 init_rwsem(&ei->i_data_sem);
99600051
NJ		 161 ei->cached_extent.lstart = -1;
162 spin_lock_init(&ei->i_extent_cache_lock);
95f8797f 163
1da177e4
LT		 164 return &ei->vfs_inode;
165}
166
fa0d7e3d 167static void udf_i_callback(struct rcu_head *head)
1da177e4 168{
fa0d7e3d 169 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 170 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
171}
172
fa0d7e3d
NP		 173static void udf_destroy_inode(struct inode *inode)
174{
175 call_rcu(&inode->i_rcu, udf_i_callback);
176}
177
51cc5068 178static void init_once(void *foo)
1da177e4 179{
cb00ea35 180 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 181
a35afb83
CL		 182 ei->i_ext.i_data = NULL;
183 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 184}
185
53ea18de 186static int __init init_inodecache(void)
1da177e4
LT		 187{
188 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
189 sizeof(struct udf_inode_info),
cb00ea35 190 0, (SLAB_RECLAIM_ACCOUNT |
5d097056
VD		 191 SLAB_MEM_SPREAD |
192 SLAB_ACCOUNT),
20c2df83 193 init_once);
28de7948 194 if (!udf_inode_cachep)
1da177e4
LT		 195 return -ENOMEM;
196 return 0;
197}
198
199static void destroy_inodecache(void)
200{
8c0a8537
KS		 201 /*
202 * Make sure all delayed rcu free inodes are flushed before we
203 * destroy cache.
204 */
205 rcu_barrier();
1a1d92c1 206 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 207}
208
209/* Superblock operations */
ee9b6d61 210static const struct super_operations udf_sb_ops = {
28de7948
CG		 211 .alloc_inode = udf_alloc_inode,
212 .destroy_inode = udf_destroy_inode,
213 .write_inode = udf_write_inode,
3aac2b62 214 .evict_inode = udf_evict_inode,
28de7948 215 .put_super = udf_put_super,
146bca72 216 .sync_fs = udf_sync_fs,
28de7948
CG		 217 .statfs = udf_statfs,
218 .remount_fs = udf_remount_fs,
6da80894 219 .show_options = udf_show_options,
1da177e4
LT		 220};
221
cb00ea35 222struct udf_options {
1da177e4
LT		 223 unsigned char novrs;
224 unsigned int blocksize;
225 unsigned int session;
226 unsigned int lastblock;
227 unsigned int anchor;
228 unsigned int volume;
229 unsigned short partition;
230 unsigned int fileset;
231 unsigned int rootdir;
232 unsigned int flags;
faa17292 233 umode_t umask;
c2ba138a
EB		 234 kgid_t gid;
235 kuid_t uid;
faa17292
AV		 236 umode_t fmode;
237 umode_t dmode;
1da177e4
LT		 238 struct nls_table *nls_map;
239};
240
241static int __init init_udf_fs(void)
242{
243 int err;
28de7948 244
1da177e4
LT		 245 err = init_inodecache();
246 if (err)
247 goto out1;
248 err = register_filesystem(&udf_fstype);
249 if (err)
250 goto out;
28de7948 251
1da177e4 252 return 0;
28de7948
CG		 253
254out:
1da177e4 255 destroy_inodecache();
28de7948
CG		 256
257out1:
1da177e4
LT		 258 return err;
259}
260
261static void __exit exit_udf_fs(void)
262{
263 unregister_filesystem(&udf_fstype);
264 destroy_inodecache();
265}
266
dc5d39be
MS		 267static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
268{
269 struct udf_sb_info *sbi = UDF_SB(sb);
270
271 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
272 GFP_KERNEL);
273 if (!sbi->s_partmaps) {
8076c363
JP		 274 udf_err(sb, "Unable to allocate space for %d partition maps\n",
275 count);
dc5d39be
MS		 276 sbi->s_partitions = 0;
277 return -ENOMEM;
278 }
279
280 sbi->s_partitions = count;
281 return 0;
282}
283
bff943af
JK		 284static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
285{
286 int i;
287 int nr_groups = bitmap->s_nr_groups;
bff943af
JK		 288
289 for (i = 0; i < nr_groups; i++)
290 if (bitmap->s_block_bitmap[i])
291 brelse(bitmap->s_block_bitmap[i]);
292
1d5cfdb0 293 kvfree(bitmap);
bff943af
JK		 294}
295
296static void udf_free_partition(struct udf_part_map *map)
297{
298 int i;
299 struct udf_meta_data *mdata;
300
301 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
302 iput(map->s_uspace.s_table);
303 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
304 iput(map->s_fspace.s_table);
305 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
306 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
307 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
308 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
309 if (map->s_partition_type == UDF_SPARABLE_MAP15)
310 for (i = 0; i < 4; i++)
311 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
312 else if (map->s_partition_type == UDF_METADATA_MAP25) {
313 mdata = &map->s_type_specific.s_metadata;
314 iput(mdata->s_metadata_fe);
315 mdata->s_metadata_fe = NULL;
316
317 iput(mdata->s_mirror_fe);
318 mdata->s_mirror_fe = NULL;
319
320 iput(mdata->s_bitmap_fe);
321 mdata->s_bitmap_fe = NULL;
322 }
323}
324
325static void udf_sb_free_partitions(struct super_block *sb)
326{
327 struct udf_sb_info *sbi = UDF_SB(sb);
328 int i;
1b1baff6
NJ		 329 if (sbi->s_partmaps == NULL)
330 return;
bff943af
JK		 331 for (i = 0; i < sbi->s_partitions; i++)
332 udf_free_partition(&sbi->s_partmaps[i]);
333 kfree(sbi->s_partmaps);
334 sbi->s_partmaps = NULL;
335}
336
34c80b1d 337static int udf_show_options(struct seq_file *seq, struct dentry *root)
6da80894 338{
34c80b1d 339 struct super_block *sb = root->d_sb;
6da80894
MS		 340 struct udf_sb_info *sbi = UDF_SB(sb);
341
342 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
343 seq_puts(seq, ",nostrict");
1197e4df 344 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 345 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
346 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
347 seq_puts(seq, ",unhide");
348 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
349 seq_puts(seq, ",undelete");
350 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
351 seq_puts(seq, ",noadinicb");
352 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
353 seq_puts(seq, ",shortad");
354 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
355 seq_puts(seq, ",uid=forget");
356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
357 seq_puts(seq, ",uid=ignore");
358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
359 seq_puts(seq, ",gid=forget");
360 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
361 seq_puts(seq, ",gid=ignore");
362 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
c2ba138a 363 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
6da80894 364 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
c2ba138a 365 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
6da80894 366 if (sbi->s_umask != 0)
faa17292 367 seq_printf(seq, ",umask=%ho", sbi->s_umask);
87bc730c 368 if (sbi->s_fmode != UDF_INVALID_MODE)
faa17292 369 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
87bc730c 370 if (sbi->s_dmode != UDF_INVALID_MODE)
faa17292 371 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
6da80894
MS		 372 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
373 seq_printf(seq, ",session=%u", sbi->s_session);
374 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
375 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 376 if (sbi->s_anchor != 0)
377 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 378 /*
379 * volume, partition, fileset and rootdir seem to be ignored
380 * currently
381 */
382 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
383 seq_puts(seq, ",utf8");
384 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
385 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
386
387 return 0;
388}
389
1da177e4
LT		 390/*
391 * udf_parse_options
392 *
393 * PURPOSE
394 * Parse mount options.
395 *
396 * DESCRIPTION
397 * The following mount options are supported:
398 *
399 * gid= Set the default group.
400 * umask= Set the default umask.
7ac9bcd5
MS		 401 * mode= Set the default file permissions.
402 * dmode= Set the default directory permissions.
1da177e4
LT		 403 * uid= Set the default user.
404 * bs= Set the block size.
405 * unhide Show otherwise hidden files.
406 * undelete Show deleted files in lists.
407 * adinicb Embed data in the inode (default)
408 * noadinicb Don't embed data in the inode
409 * shortad Use short ad's
410 * longad Use long ad's (default)
411 * nostrict Unset strict conformance
412 * iocharset= Set the NLS character set
413 *
414 * The remaining are for debugging and disaster recovery:
415 *
28de7948 416 * novrs Skip volume sequence recognition
1da177e4
LT		 417 *
418 * The following expect a offset from 0.
419 *
420 * session= Set the CDROM session (default= last session)
421 * anchor= Override standard anchor location. (default= 256)
422 * volume= Override the VolumeDesc location. (unused)
423 * partition= Override the PartitionDesc location. (unused)
424 * lastblock= Set the last block of the filesystem/
425 *
426 * The following expect a offset from the partition root.
427 *
428 * fileset= Override the fileset block location. (unused)
429 * rootdir= Override the root directory location. (unused)
430 * WARNING: overriding the rootdir to a non-directory may
431 * yield highly unpredictable results.
432 *
433 * PRE-CONDITIONS
434 * options Pointer to mount options string.
435 * uopts Pointer to mount options variable.
436 *
437 * POST-CONDITIONS
438 * <return> 1 Mount options parsed okay.
439 * <return> 0 Error parsing mount options.
440 *
441 * HISTORY
442 * July 1, 1997 - Andrew E. Mileski
443 * Written, tested, and released.
444 */
28de7948 445
1da177e4
LT		 446enum {
447 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
448 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
449 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
450 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
451 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 452 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
453 Opt_fmode, Opt_dmode
1da177e4
LT		 454};
455
a447c093 456static const match_table_t tokens = {
28de7948
CG		 457 {Opt_novrs, "novrs"},
458 {Opt_nostrict, "nostrict"},
459 {Opt_bs, "bs=%u"},
460 {Opt_unhide, "unhide"},
461 {Opt_undelete, "undelete"},
462 {Opt_noadinicb, "noadinicb"},
463 {Opt_adinicb, "adinicb"},
464 {Opt_shortad, "shortad"},
465 {Opt_longad, "longad"},
466 {Opt_uforget, "uid=forget"},
467 {Opt_uignore, "uid=ignore"},
468 {Opt_gforget, "gid=forget"},
469 {Opt_gignore, "gid=ignore"},
470 {Opt_gid, "gid=%u"},
471 {Opt_uid, "uid=%u"},
472 {Opt_umask, "umask=%o"},
473 {Opt_session, "session=%u"},
474 {Opt_lastblock, "lastblock=%u"},
475 {Opt_anchor, "anchor=%u"},
476 {Opt_volume, "volume=%u"},
477 {Opt_partition, "partition=%u"},
478 {Opt_fileset, "fileset=%u"},
479 {Opt_rootdir, "rootdir=%u"},
480 {Opt_utf8, "utf8"},
481 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 482 {Opt_fmode, "mode=%o"},
483 {Opt_dmode, "dmode=%o"},
28de7948 484 {Opt_err, NULL}
1da177e4
LT		 485};
486
6da80894
MS		 487static int udf_parse_options(char *options, struct udf_options *uopt,
488 bool remount)
1da177e4
LT		 489{
490 char *p;
491 int option;
492
493 uopt->novrs = 0;
1da177e4
LT		 494 uopt->partition = 0xFFFF;
495 uopt->session = 0xFFFFFFFF;
496 uopt->lastblock = 0;
497 uopt->anchor = 0;
498 uopt->volume = 0xFFFFFFFF;
499 uopt->rootdir = 0xFFFFFFFF;
500 uopt->fileset = 0xFFFFFFFF;
501 uopt->nls_map = NULL;
502
503 if (!options)
504 return 1;
505
cb00ea35 506 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 507 substring_t args[MAX_OPT_ARGS];
508 int token;
8c6915ae 509 unsigned n;
1da177e4
LT		 510 if (!*p)
511 continue;
512
513 token = match_token(p, tokens, args);
cb00ea35
CG		 514 switch (token) {
515 case Opt_novrs:
516 uopt->novrs = 1;
4136801a 517 break;
cb00ea35
CG		 518 case Opt_bs:
519 if (match_int(&args[0], &option))
520 return 0;
8c6915ae
FF		 521 n = option;
522 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
523 return 0;
524 uopt->blocksize = n;
1197e4df 525 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 526 break;
527 case Opt_unhide:
528 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
529 break;
530 case Opt_undelete:
531 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
532 break;
533 case Opt_noadinicb:
534 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
535 break;
536 case Opt_adinicb:
537 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
538 break;
539 case Opt_shortad:
540 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
541 break;
542 case Opt_longad:
543 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
544 break;
545 case Opt_gid:
546 if (match_int(args, &option))
547 return 0;
c2ba138a
EB		 548 uopt->gid = make_kgid(current_user_ns(), option);
549 if (!gid_valid(uopt->gid))
550 return 0;
ca76d2d8 551 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 552 break;
553 case Opt_uid:
554 if (match_int(args, &option))
555 return 0;
c2ba138a
EB		 556 uopt->uid = make_kuid(current_user_ns(), option);
557 if (!uid_valid(uopt->uid))
558 return 0;
ca76d2d8 559 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 560 break;
561 case Opt_umask:
562 if (match_octal(args, &option))
563 return 0;
564 uopt->umask = option;
565 break;
566 case Opt_nostrict:
567 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
568 break;
569 case Opt_session:
570 if (match_int(args, &option))
571 return 0;
572 uopt->session = option;
6da80894
MS		 573 if (!remount)
574 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 575 break;
576 case Opt_lastblock:
577 if (match_int(args, &option))
578 return 0;
579 uopt->lastblock = option;
6da80894
MS		 580 if (!remount)
581 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 582 break;
583 case Opt_anchor:
584 if (match_int(args, &option))
585 return 0;
586 uopt->anchor = option;
587 break;
588 case Opt_volume:
589 if (match_int(args, &option))
590 return 0;
591 uopt->volume = option;
592 break;
593 case Opt_partition:
594 if (match_int(args, &option))
595 return 0;
596 uopt->partition = option;
597 break;
598 case Opt_fileset:
599 if (match_int(args, &option))
600 return 0;
601 uopt->fileset = option;
602 break;
603 case Opt_rootdir:
604 if (match_int(args, &option))
605 return 0;
606 uopt->rootdir = option;
607 break;
608 case Opt_utf8:
609 uopt->flags |= (1 << UDF_FLAG_UTF8);
610 break;
1da177e4 611#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 612 case Opt_iocharset:
613 uopt->nls_map = load_nls(args[0].from);
614 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
615 break;
1da177e4 616#endif
cb00ea35
CG		 617 case Opt_uignore:
618 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
619 break;
620 case Opt_uforget:
621 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
622 break;
623 case Opt_gignore:
624 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
625 break;
626 case Opt_gforget:
627 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
628 break;
7ac9bcd5
MS		 629 case Opt_fmode:
630 if (match_octal(args, &option))
631 return 0;
632 uopt->fmode = option & 0777;
633 break;
634 case Opt_dmode:
635 if (match_octal(args, &option))
636 return 0;
637 uopt->dmode = option & 0777;
638 break;
cb00ea35 639 default:
78ace70c 640 pr_err("bad mount option \"%s\" or missing value\n", p);
1da177e4
LT		 641 return 0;
642 }
643 }
644 return 1;
645}
646
cb00ea35 647static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 648{
649 struct udf_options uopt;
6c79e987 650 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 651 int error = 0;
69d75671 652 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
1da177e4 653
02b9984d 654 sync_filesystem(sb);
69d75671
JK		 655 if (lvidiu) {
656 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
e729eac6
JK		 657 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
658 return -EACCES;
659 }
660
6c79e987
MS		 661 uopt.flags = sbi->s_flags;
662 uopt.uid = sbi->s_uid;
663 uopt.gid = sbi->s_gid;
664 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 665 uopt.fmode = sbi->s_fmode;
666 uopt.dmode = sbi->s_dmode;
1da177e4 667
6da80894 668 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 669 return -EINVAL;
670
c03cad24 671 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 672 sbi->s_flags = uopt.flags;
673 sbi->s_uid = uopt.uid;
674 sbi->s_gid = uopt.gid;
675 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 676 sbi->s_fmode = uopt.fmode;
677 sbi->s_dmode = uopt.dmode;
c03cad24 678 write_unlock(&sbi->s_cred_lock);
1da177e4 679
c79d967d
CH		 680 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
681 goto out_unlock;
682
36350462 683 if (*flags & MS_RDONLY)
1da177e4 684 udf_close_lvid(sb);
36350462 685 else
1da177e4
LT		 686 udf_open_lvid(sb);
687
c79d967d 688out_unlock:
c79d967d 689 return error;
1da177e4
LT		 690}
691
40346005
JK		 692/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
693/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
694static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 695{
696 struct volStructDesc *vsd = NULL;
44499602 697 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
1da177e4
LT		 698 int sectorsize;
699 struct buffer_head *bh = NULL;
cb00ea35
CG		 700 int nsr02 = 0;
701 int nsr03 = 0;
6c79e987 702 struct udf_sb_info *sbi;
1da177e4 703
6c79e987 704 sbi = UDF_SB(sb);
1da177e4
LT		 705 if (sb->s_blocksize < sizeof(struct volStructDesc))
706 sectorsize = sizeof(struct volStructDesc);
707 else
708 sectorsize = sb->s_blocksize;
709
6c79e987 710 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 711
712 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 713 (unsigned int)(sector >> sb->s_blocksize_bits),
714 sb->s_blocksize);
44499602
PF		 715 /* Process the sequence (if applicable). The hard limit on the sector
716 * offset is arbitrary, hopefully large enough so that all valid UDF
717 * filesystems will be recognised. There is no mention of an upper
718 * bound to the size of the volume recognition area in the standard.
719 * The limit will prevent the code to read all the sectors of a
720 * specially crafted image (like a bluray disc full of CD001 sectors),
721 * potentially causing minutes or even hours of uninterruptible I/O
722 * activity. This actually happened with uninitialised SSD partitions
723 * (all 0xFF) before the check for the limit and all valid IDs were
724 * added */
725 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
726 sector += sectorsize) {
1da177e4
LT		 727 /* Read a block */
728 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
729 if (!bh)
730 break;
731
732 /* Look for ISO descriptors */
733 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 734 (sector & (sb->s_blocksize - 1)));
1da177e4 735
44499602 736 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
3a71fc5d 737 VSD_STD_ID_LEN)) {
cb00ea35
CG		 738 switch (vsd->structType) {
739 case 0:
740 udf_debug("ISO9660 Boot Record found\n");
741 break;
742 case 1:
a983f368 743 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 744 break;
745 case 2:
a983f368 746 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 747 break;
748 case 3:
a983f368 749 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 750 break;
751 case 255:
a983f368 752 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 753 break;
754 default:
755 udf_debug("ISO9660 VRS (%u) found\n",
756 vsd->structType);
757 break;
1da177e4 758 }
3a71fc5d
MS		 759 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
760 VSD_STD_ID_LEN))
761 ; /* nothing */
762 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
763 VSD_STD_ID_LEN)) {
3bf25cb4 764 brelse(bh);
1da177e4 765 break;
3a71fc5d
MS		 766 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
767 VSD_STD_ID_LEN))
1da177e4 768 nsr02 = sector;
3a71fc5d
MS		 769 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
770 VSD_STD_ID_LEN))
1da177e4 771 nsr03 = sector;
44499602
PF		 772 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
773 VSD_STD_ID_LEN))
774 ; /* nothing */
775 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
776 VSD_STD_ID_LEN))
777 ; /* nothing */
778 else {
779 /* invalid id : end of volume recognition area */
780 brelse(bh);
781 break;
782 }
3bf25cb4 783 brelse(bh);
1da177e4
LT		 784 }
785
786 if (nsr03)
787 return nsr03;
788 else if (nsr02)
789 return nsr02;
44499602
PF		 790 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
791 VSD_FIRST_SECTOR_OFFSET)
1da177e4
LT		 792 return -1;
793 else
794 return 0;
795}
796
3a71fc5d 797static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 798 struct kernel_lb_addr *fileset,
799 struct kernel_lb_addr *root)
1da177e4
LT		 800{
801 struct buffer_head *bh = NULL;
802 long lastblock;
803 uint16_t ident;
6c79e987 804 struct udf_sb_info *sbi;
1da177e4
LT		 805
806 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 807 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 808 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 809
28de7948 810 if (!bh) {
1da177e4 811 return 1;
28de7948 812 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 813 brelse(bh);
1da177e4
LT		 814 return 1;
815 }
cb00ea35 816
1da177e4
LT		 817 }
818
6c79e987 819 sbi = UDF_SB(sb);
3a71fc5d
MS		 820 if (!bh) {
821 /* Search backwards through the partitions */
5ca4e4be 822 struct kernel_lb_addr newfileset;
1da177e4 823
28de7948 824/* --> cvg: FIXME - is it reasonable? */
1da177e4 825 return 1;
cb00ea35 826
6c79e987 827 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 828 (newfileset.partitionReferenceNum != 0xFFFF &&
829 fileset->logicalBlockNum == 0xFFFFFFFF &&
830 fileset->partitionReferenceNum == 0xFFFF);
831 newfileset.partitionReferenceNum--) {
6c79e987
MS		 832 lastblock = sbi->s_partmaps
833 [newfileset.partitionReferenceNum]
834 .s_partition_len;
1da177e4
LT		 835 newfileset.logicalBlockNum = 0;
836
cb00ea35 837 do {
97e961fd 838 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 839 &ident);
cb00ea35
CG		 840 if (!bh) {
841 newfileset.logicalBlockNum++;
1da177e4
LT		 842 continue;
843 }
844
cb00ea35
CG		 845 switch (ident) {
846 case TAG_IDENT_SBD:
28de7948
CG		 847 {
848 struct spaceBitmapDesc *sp;
4b11111a
MS		 849 sp = (struct spaceBitmapDesc *)
850 bh->b_data;
28de7948
CG		 851 newfileset.logicalBlockNum += 1 +
852 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 853 sizeof(struct spaceBitmapDesc)
854 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 855 brelse(bh);
856 break;
857 }
cb00ea35 858 case TAG_IDENT_FSD:
28de7948
CG		 859 *fileset = newfileset;
860 break;
cb00ea35 861 default:
28de7948
CG		 862 newfileset.logicalBlockNum++;
863 brelse(bh);
864 bh = NULL;
865 break;
1da177e4 866 }
28de7948
CG		 867 } while (newfileset.logicalBlockNum < lastblock &&
868 fileset->logicalBlockNum == 0xFFFFFFFF &&
869 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 870 }
871 }
872
873 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 874 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 875 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 876 fileset->logicalBlockNum,
877 fileset->partitionReferenceNum);
1da177e4 878
6c79e987 879 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 880 udf_load_fileset(sb, bh, root);
3bf25cb4 881 brelse(bh);
1da177e4
LT		 882 return 0;
883 }
884 return 1;
885}
886
d759bfa4
JK		 887/*
888 * Load primary Volume Descriptor Sequence
889 *
890 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
891 * should be tried.
892 */
c0eb31ed 893static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 894{
895 struct primaryVolDesc *pvoldesc;
9293fcfb 896 uint8_t *outstr;
c0eb31ed
JK		 897 struct buffer_head *bh;
898 uint16_t ident;
d759bfa4 899 int ret = -ENOMEM;
ba9aadd8 900
9293fcfb 901 outstr = kmalloc(128, GFP_NOFS);
ba9aadd8 902 if (!outstr)
9293fcfb 903 return -ENOMEM;
c0eb31ed
JK		 904
905 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 906 if (!bh) {
907 ret = -EAGAIN;
ba9aadd8 908 goto out2;
d759bfa4 909 }
ba9aadd8 910
d759bfa4
JK		 911 if (ident != TAG_IDENT_PVD) {
912 ret = -EIO;
913 goto out_bh;
914 }
1da177e4
LT		 915
916 pvoldesc = (struct primaryVolDesc *)bh->b_data;
917
56774805
MS		 918 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
919 pvoldesc->recordingDateAndTime)) {
af15a298 920#ifdef UDFFS_DEBUG
5ca4e4be 921 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 922 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 923 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
924 ts->minute, le16_to_cpu(ts->typeAndTimezone));
925#endif
1da177e4
LT		 926 }
927
c26f6c61 928 ret = udf_dstrCS0toUTF8(outstr, 31, pvoldesc->volIdent, 32);
9293fcfb
AG		 929 if (ret < 0)
930 goto out_bh;
e9d4cf41 931
9293fcfb
AG		 932 strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
933 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
1da177e4 934
c26f6c61 935 ret = udf_dstrCS0toUTF8(outstr, 127, pvoldesc->volSetIdent, 128);
9293fcfb
AG		 936 if (ret < 0)
937 goto out_bh;
e9d4cf41 938
9293fcfb
AG		 939 outstr[ret] = 0;
940 udf_debug("volSetIdent[] = '%s'\n", outstr);
c0eb31ed 941
ba9aadd8 942 ret = 0;
d759bfa4
JK		 943out_bh:
944 brelse(bh);
ba9aadd8
MS		 945out2:
946 kfree(outstr);
ba9aadd8 947 return ret;
1da177e4
LT		 948}
949
3080a74e 950struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
7888824b 951 u32 meta_file_loc, u32 partition_ref)
3080a74e
NJ		 952{
953 struct kernel_lb_addr addr;
954 struct inode *metadata_fe;
955
956 addr.logicalBlockNum = meta_file_loc;
7888824b 957 addr.partitionReferenceNum = partition_ref;
3080a74e 958
6174c2eb 959 metadata_fe = udf_iget_special(sb, &addr);
3080a74e 960
6d3d5e86 961 if (IS_ERR(metadata_fe)) {
3080a74e 962 udf_warn(sb, "metadata inode efe not found\n");
6d3d5e86
JK		 963 return metadata_fe;
964 }
965 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
3080a74e
NJ		 966 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
967 iput(metadata_fe);
6d3d5e86 968 return ERR_PTR(-EIO);
3080a74e
NJ		 969 }
970
971 return metadata_fe;
972}
973
7888824b
AT		 974static int udf_load_metadata_files(struct super_block *sb, int partition,
975 int type1_index)
bfb257a5
JK		 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;
6d3d5e86 981 struct inode *fe;
bfb257a5
JK		 982
983 map = &sbi->s_partmaps[partition];
984 mdata = &map->s_type_specific.s_metadata;
7888824b 985 mdata->s_phys_partition_ref = type1_index;
bfb257a5
JK		 986
987 /* metadata address */
bfb257a5 988 udf_debug("Metadata file location: block = %d part = %d\n",
7888824b 989 mdata->s_meta_file_loc, mdata->s_phys_partition_ref);
bfb257a5 990
6d3d5e86 991 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
7888824b 992 mdata->s_phys_partition_ref);
6d3d5e86 993 if (IS_ERR(fe)) {
3080a74e
NJ		 994 /* mirror file entry */
995 udf_debug("Mirror metadata file location: block = %d part = %d\n",
7888824b 996 mdata->s_mirror_file_loc, mdata->s_phys_partition_ref);
bfb257a5 997
6d3d5e86 998 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
7888824b 999 mdata->s_phys_partition_ref);
bfb257a5 1000
6d3d5e86 1001 if (IS_ERR(fe)) {
3080a74e 1002 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
6d3d5e86 1003 return PTR_ERR(fe);
3080a74e 1004 }
6d3d5e86
JK		 1005 mdata->s_mirror_fe = fe;
1006 } else
1007 mdata->s_metadata_fe = fe;
1008
bfb257a5
JK		 1009
1010 /*
1011 * bitmap file entry
1012 * Note:
1013 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1014 */
1015 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1016 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
7888824b 1017 addr.partitionReferenceNum = mdata->s_phys_partition_ref;
bfb257a5
JK		 1018
1019 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 1020 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 1021
6174c2eb 1022 fe = udf_iget_special(sb, &addr);
6d3d5e86 1023 if (IS_ERR(fe)) {
bfb257a5 1024 if (sb->s_flags & MS_RDONLY)
a40ecd7b 1025 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 1026 else {
8076c363 1027 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
6d3d5e86 1028 return PTR_ERR(fe);
bfb257a5 1029 }
6d3d5e86
JK		 1030 } else
1031 mdata->s_bitmap_fe = fe;
bfb257a5
JK		 1032 }
1033
1034 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 1035 return 0;
bfb257a5
JK		 1036}
1037
28de7948 1038static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1039 struct kernel_lb_addr *root)
1da177e4
LT		 1040{
1041 struct fileSetDesc *fset;
1042
1043 fset = (struct fileSetDesc *)bh->b_data;
1044
1045 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1046
6c79e987 1047 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1048
cb00ea35
CG		 1049 udf_debug("Rootdir at block=%d, partition=%d\n",
1050 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1051}
1052
883cb9d1
MS		 1053int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1054{
1055 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1056 return DIV_ROUND_UP(map->s_partition_len +
1057 (sizeof(struct spaceBitmapDesc) << 3),
1058 sb->s_blocksize * 8);
883cb9d1
MS		 1059}
1060
66e1da3f
MS		 1061static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1062{
66e1da3f
MS		 1063 struct udf_bitmap *bitmap;
1064 int nr_groups;
1065 int size;
1066
883cb9d1 1067 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1068 size = sizeof(struct udf_bitmap) +
1069 (sizeof(struct buffer_head *) * nr_groups);
1070
1071 if (size <= PAGE_SIZE)
ed2ae6f6 1072 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1073 else
ed2ae6f6 1074 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1075
75b09e02 1076 if (bitmap == NULL)
66e1da3f 1077 return NULL;
66e1da3f 1078
66e1da3f
MS		 1079 bitmap->s_nr_groups = nr_groups;
1080 return bitmap;
1081}
1082
3fb38dfa
JK		 1083static int udf_fill_partdesc_info(struct super_block *sb,
1084 struct partitionDesc *p, int p_index)
1da177e4 1085{
6c79e987 1086 struct udf_part_map *map;
165923fa 1087 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1088 struct partitionHeaderDesc *phd;
165923fa 1089
3fb38dfa 1090 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1091
1092 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1093 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1094
1095 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1096 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1097 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1098 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1099 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1100 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1101 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1102 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1103
a983f368
JP		 1104 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1105 p_index, map->s_partition_type,
1106 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1107
1108 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1109 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1110 return 0;
165923fa
MS		 1111
1112 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1113 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1114 struct kernel_lb_addr loc = {
165923fa
MS		 1115 .logicalBlockNum = le32_to_cpu(
1116 phd->unallocSpaceTable.extPosition),
3fb38dfa 1117 .partitionReferenceNum = p_index,
165923fa 1118 };
6d3d5e86 1119 struct inode *inode;
165923fa 1120
6174c2eb 1121 inode = udf_iget_special(sb, &loc);
6d3d5e86 1122 if (IS_ERR(inode)) {
165923fa 1123 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1124 p_index);
6d3d5e86 1125 return PTR_ERR(inode);
165923fa 1126 }
6d3d5e86 1127 map->s_uspace.s_table = inode;
165923fa
MS		 1128 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1129 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1130 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1131 }
1132
1133 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1134 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1135 if (!bitmap)
d759bfa4 1136 return -ENOMEM;
165923fa 1137 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1138 bitmap->s_extPosition = le32_to_cpu(
165923fa 1139 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1140 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1141 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1142 p_index, bitmap->s_extPosition);
165923fa
MS		 1143 }
1144
1145 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1146 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1147
1148 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1149 struct kernel_lb_addr loc = {
165923fa
MS		 1150 .logicalBlockNum = le32_to_cpu(
1151 phd->freedSpaceTable.extPosition),
3fb38dfa 1152 .partitionReferenceNum = p_index,
165923fa 1153 };
6d3d5e86 1154 struct inode *inode;
165923fa 1155
6174c2eb 1156 inode = udf_iget_special(sb, &loc);
6d3d5e86 1157 if (IS_ERR(inode)) {
3fb38dfa 1158 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1159 p_index);
6d3d5e86 1160 return PTR_ERR(inode);
165923fa 1161 }
6d3d5e86 1162 map->s_fspace.s_table = inode;
165923fa
MS		 1163 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1164 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1165 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1166 }
1167
1168 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1169 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1170 if (!bitmap)
d759bfa4 1171 return -ENOMEM;
165923fa 1172 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1173 bitmap->s_extPosition = le32_to_cpu(
165923fa 1174 phd->freedSpaceBitmap.extPosition);
2e0838fd 1175 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1176 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1177 p_index, bitmap->s_extPosition);
165923fa 1178 }
3fb38dfa
JK		 1179 return 0;
1180}
1181
e971b0b9
JK		 1182static void udf_find_vat_block(struct super_block *sb, int p_index,
1183 int type1_index, sector_t start_block)
38b74a53
JK		 1184{
1185 struct udf_sb_info *sbi = UDF_SB(sb);
1186 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1187 sector_t vat_block;
5ca4e4be 1188 struct kernel_lb_addr ino;
6d3d5e86 1189 struct inode *inode;
e971b0b9
JK		 1190
1191 /*
1192 * VAT file entry is in the last recorded block. Some broken disks have
1193 * it a few blocks before so try a bit harder...
1194 */
1195 ino.partitionReferenceNum = type1_index;
1196 for (vat_block = start_block;
1197 vat_block >= map->s_partition_root &&
6d3d5e86 1198 vat_block >= start_block - 3; vat_block--) {
e971b0b9 1199 ino.logicalBlockNum = vat_block - map->s_partition_root;
6174c2eb 1200 inode = udf_iget_special(sb, &ino);
6d3d5e86
JK		 1201 if (!IS_ERR(inode)) {
1202 sbi->s_vat_inode = inode;
1203 break;
1204 }
e971b0b9
JK		 1205 }
1206}
1207
1208static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1209{
1210 struct udf_sb_info *sbi = UDF_SB(sb);
1211 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1212 struct buffer_head *bh = NULL;
1213 struct udf_inode_info *vati;
1214 uint32_t pos;
1215 struct virtualAllocationTable20 *vat20;
4bf17af0 1216 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1217
e971b0b9 1218 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1219 if (!sbi->s_vat_inode &&
1220 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1221 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1222 (unsigned long)sbi->s_last_block,
1223 (unsigned long)blocks - 1);
e971b0b9 1224 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1225 }
38b74a53 1226 if (!sbi->s_vat_inode)
d759bfa4 1227 return -EIO;
38b74a53
JK		 1228
1229 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1230 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1231 map->s_type_specific.s_virtual.s_num_entries =
1232 (sbi->s_vat_inode->i_size - 36) >> 2;
1233 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1234 vati = UDF_I(sbi->s_vat_inode);
1235 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1236 pos = udf_block_map(sbi->s_vat_inode, 0);
1237 bh = sb_bread(sb, pos);
1238 if (!bh)
d759bfa4 1239 return -EIO;
fa5e0815
JK		 1240 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1241 } else {
1242 vat20 = (struct virtualAllocationTable20 *)
1243 vati->i_ext.i_data;
1244 }
38b74a53 1245
38b74a53 1246 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1247 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1248 map->s_type_specific.s_virtual.s_num_entries =
1249 (sbi->s_vat_inode->i_size -
1250 map->s_type_specific.s_virtual.
1251 s_start_offset) >> 2;
1252 brelse(bh);
1253 }
1254 return 0;
1255}
1256
d759bfa4
JK		 1257/*
1258 * Load partition descriptor block
1259 *
1260 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1261 * sequence.
1262 */
3fb38dfa
JK		 1263static int udf_load_partdesc(struct super_block *sb, sector_t block)
1264{
1265 struct buffer_head *bh;
1266 struct partitionDesc *p;
1267 struct udf_part_map *map;
1268 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1269 int i, type1_idx;
3fb38dfa
JK		 1270 uint16_t partitionNumber;
1271 uint16_t ident;
d759bfa4 1272 int ret;
3fb38dfa
JK		 1273
1274 bh = udf_read_tagged(sb, block, block, &ident);
1275 if (!bh)
d759bfa4
JK		 1276 return -EAGAIN;
1277 if (ident != TAG_IDENT_PD) {
1278 ret = 0;
3fb38dfa 1279 goto out_bh;
d759bfa4 1280 }
3fb38dfa
JK		 1281
1282 p = (struct partitionDesc *)bh->b_data;
1283 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1284
7888824b 1285 /* First scan for TYPE1 and SPARABLE partitions */
3fb38dfa
JK		 1286 for (i = 0; i < sbi->s_partitions; i++) {
1287 map = &sbi->s_partmaps[i];
1288 udf_debug("Searching map: (%d == %d)\n",
1289 map->s_partition_num, partitionNumber);
38b74a53
JK		 1290 if (map->s_partition_num == partitionNumber &&
1291 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1292 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1293 break;
1294 }
1295
38b74a53 1296 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1297 udf_debug("Partition (%d) not found in partition map\n",
1298 partitionNumber);
d759bfa4 1299 ret = 0;
3fb38dfa
JK		 1300 goto out_bh;
1301 }
165923fa 1302
3fb38dfa 1303 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1304 if (ret < 0)
1305 goto out_bh;
38b74a53
JK		 1306
1307 /*
bfb257a5
JK		 1308 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1309 * PHYSICAL partitions are already set up
38b74a53
JK		 1310 */
1311 type1_idx = i;
44499602
PF		 1312#ifdef UDFFS_DEBUG
1313 map = NULL; /* supress 'maybe used uninitialized' warning */
1314#endif
38b74a53
JK		 1315 for (i = 0; i < sbi->s_partitions; i++) {
1316 map = &sbi->s_partmaps[i];
1317
1318 if (map->s_partition_num == partitionNumber &&
1319 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1320 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1321 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1322 break;
1323 }
1324
d759bfa4
JK		 1325 if (i >= sbi->s_partitions) {
1326 ret = 0;
38b74a53 1327 goto out_bh;
d759bfa4 1328 }
38b74a53
JK		 1329
1330 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1331 if (ret < 0)
38b74a53
JK		 1332 goto out_bh;
1333
bfb257a5 1334 if (map->s_partition_type == UDF_METADATA_MAP25) {
7888824b 1335 ret = udf_load_metadata_files(sb, i, type1_idx);
d759bfa4 1336 if (ret < 0) {
78ace70c
JP		 1337 udf_err(sb, "error loading MetaData partition map %d\n",
1338 i);
bfb257a5
JK		 1339 goto out_bh;
1340 }
1341 } else {
e729eac6
JK		 1342 /*
1343 * If we have a partition with virtual map, we don't handle
1344 * writing to it (we overwrite blocks instead of relocating
1345 * them).
1346 */
1347 if (!(sb->s_flags & MS_RDONLY)) {
1348 ret = -EACCES;
1349 goto out_bh;
1350 }
bfb257a5 1351 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1352 if (ret < 0)
bfb257a5 1353 goto out_bh;
bfb257a5 1354 }
d759bfa4 1355 ret = 0;
c0eb31ed 1356out_bh:
2e0838fd 1357 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1358 brelse(bh);
1359 return ret;
1da177e4
LT		 1360}
1361
1df2ae31
JK		 1362static int udf_load_sparable_map(struct super_block *sb,
1363 struct udf_part_map *map,
1364 struct sparablePartitionMap *spm)
1365{
1366 uint32_t loc;
1367 uint16_t ident;
1368 struct sparingTable *st;
1369 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1370 int i;
1371 struct buffer_head *bh;
1372
1373 map->s_partition_type = UDF_SPARABLE_MAP15;
1374 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1375 if (!is_power_of_2(sdata->s_packet_len)) {
1376 udf_err(sb, "error loading logical volume descriptor: "
1377 "Invalid packet length %u\n",
1378 (unsigned)sdata->s_packet_len);
1379 return -EIO;
1380 }
1381 if (spm->numSparingTables > 4) {
1382 udf_err(sb, "error loading logical volume descriptor: "
1383 "Too many sparing tables (%d)\n",
1384 (int)spm->numSparingTables);
1385 return -EIO;
1386 }
1387
1388 for (i = 0; i < spm->numSparingTables; i++) {
1389 loc = le32_to_cpu(spm->locSparingTable[i]);
1390 bh = udf_read_tagged(sb, loc, loc, &ident);
1391 if (!bh)
1392 continue;
1393
1394 st = (struct sparingTable *)bh->b_data;
1395 if (ident != 0 ||
1396 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1397 strlen(UDF_ID_SPARING)) ||
1398 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1399 sb->s_blocksize) {
1400 brelse(bh);
1401 continue;
1402 }
1403
1404 sdata->s_spar_map[i] = bh;
1405 }
1406 map->s_partition_func = udf_get_pblock_spar15;
1407 return 0;
1408}
1409
c0eb31ed 1410static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1411 struct kernel_lb_addr *fileset)
1da177e4
LT		 1412{
1413 struct logicalVolDesc *lvd;
1df2ae31 1414 int i, offset;
1da177e4 1415 uint8_t type;
6c79e987 1416 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1417 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1418 uint16_t ident;
1419 struct buffer_head *bh;
adee11b2 1420 unsigned int table_len;
d759bfa4 1421 int ret;
1da177e4 1422
c0eb31ed
JK		 1423 bh = udf_read_tagged(sb, block, block, &ident);
1424 if (!bh)
d759bfa4 1425 return -EAGAIN;
c0eb31ed 1426 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1427 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1428 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1429 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1430 udf_err(sb, "error loading logical volume descriptor: "
1431 "Partition table too long (%u > %lu)\n", table_len,
1432 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1433 ret = -EIO;
adee11b2
JK		 1434 goto out_bh;
1435 }
1da177e4 1436
cb14d340
JK		 1437 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1438 if (ret)
c0eb31ed 1439 goto out_bh;
1da177e4 1440
cb00ea35 1441 for (i = 0, offset = 0;
adee11b2 1442 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1443 i++, offset += gpm->partitionMapLength) {
1444 struct udf_part_map *map = &sbi->s_partmaps[i];
1445 gpm = (struct genericPartitionMap *)
1446 &(lvd->partitionMaps[offset]);
1447 type = gpm->partitionMapType;
cb00ea35 1448 if (type == 1) {
4b11111a
MS		 1449 struct genericPartitionMap1 *gpm1 =
1450 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1451 map->s_partition_type = UDF_TYPE1_MAP15;
1452 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1453 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1454 map->s_partition_func = NULL;
cb00ea35 1455 } else if (type == 2) {
4b11111a
MS		 1456 struct udfPartitionMap2 *upm2 =
1457 (struct udfPartitionMap2 *)gpm;
1458 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1459 strlen(UDF_ID_VIRTUAL))) {
1460 u16 suf =
1461 le16_to_cpu(((__le16 *)upm2->partIdent.
1462 identSuffix)[0]);
c82a1275 1463 if (suf < 0x0200) {
4b11111a
MS		 1464 map->s_partition_type =
1465 UDF_VIRTUAL_MAP15;
1466 map->s_partition_func =
1467 udf_get_pblock_virt15;
c82a1275 1468 } else {
4b11111a
MS		 1469 map->s_partition_type =
1470 UDF_VIRTUAL_MAP20;
1471 map->s_partition_func =
1472 udf_get_pblock_virt20;
1da177e4 1473 }
4b11111a
MS		 1474 } else if (!strncmp(upm2->partIdent.ident,
1475 UDF_ID_SPARABLE,
1476 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1477 ret = udf_load_sparable_map(sb, map,
1478 (struct sparablePartitionMap *)gpm);
1479 if (ret < 0)
1df2ae31 1480 goto out_bh;
bfb257a5
JK		 1481 } else if (!strncmp(upm2->partIdent.ident,
1482 UDF_ID_METADATA,
1483 strlen(UDF_ID_METADATA))) {
1484 struct udf_meta_data *mdata =
1485 &map->s_type_specific.s_metadata;
1486 struct metadataPartitionMap *mdm =
1487 (struct metadataPartitionMap *)
1488 &(lvd->partitionMaps[offset]);
a983f368
JP		 1489 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1490 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1491
1492 map->s_partition_type = UDF_METADATA_MAP25;
1493 map->s_partition_func = udf_get_pblock_meta25;
1494
1495 mdata->s_meta_file_loc =
1496 le32_to_cpu(mdm->metadataFileLoc);
1497 mdata->s_mirror_file_loc =
1498 le32_to_cpu(mdm->metadataMirrorFileLoc);
1499 mdata->s_bitmap_file_loc =
1500 le32_to_cpu(mdm->metadataBitmapFileLoc);
1501 mdata->s_alloc_unit_size =
1502 le32_to_cpu(mdm->allocUnitSize);
1503 mdata->s_align_unit_size =
1504 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1505 if (mdm->flags & 0x01)
1506 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1507
1508 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1509 le16_to_cpu(*(__le16 *)
1510 mdm->partIdent.identSuffix));
bfb257a5 1511 udf_debug("Metadata part num=%d\n",
a983f368 1512 le16_to_cpu(mdm->partitionNum));
bfb257a5 1513 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1514 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1515 udf_debug("Metadata file loc=%d\n",
a983f368 1516 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1517 udf_debug("Mirror file loc=%d\n",
a983f368 1518 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1519 udf_debug("Bitmap file loc=%d\n",
a983f368 1520 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1521 udf_debug("Flags: %d %d\n",
1522 mdata->s_flags, mdm->flags);
cb00ea35 1523 } else {
3a71fc5d
MS		 1524 udf_debug("Unknown ident: %s\n",
1525 upm2->partIdent.ident);
1da177e4
LT		 1526 continue;
1527 }
6c79e987
MS		 1528 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1529 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1530 }
1531 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1532 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1533 }
1534
cb00ea35 1535 if (fileset) {
5ca4e4be 1536 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1537
1538 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1539 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1540 fileset->logicalBlockNum,
28de7948 1541 fileset->partitionReferenceNum);
1da177e4
LT		 1542 }
1543 if (lvd->integritySeqExt.extLength)
1544 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1545 ret = 0;
c0eb31ed
JK		 1546out_bh:
1547 brelse(bh);
1548 return ret;
1da177e4
LT		 1549}
1550
1551/*
a47241cd 1552 * Find the prevailing Logical Volume Integrity Descriptor.
1da177e4 1553 */
5ca4e4be 1554static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4 1555{
a47241cd 1556 struct buffer_head *bh, *final_bh;
1da177e4 1557 uint16_t ident;
6c79e987
MS		 1558 struct udf_sb_info *sbi = UDF_SB(sb);
1559 struct logicalVolIntegrityDesc *lvid;
a47241cd
AT		 1560 int indirections = 0;
1561
1562 while (++indirections <= UDF_MAX_LVID_NESTING) {
1563 final_bh = NULL;
1564 while (loc.extLength > 0 &&
1565 (bh = udf_read_tagged(sb, loc.extLocation,
1566 loc.extLocation, &ident))) {
1567 if (ident != TAG_IDENT_LVID) {
1568 brelse(bh);
1569 break;
1570 }
1571
1572 brelse(final_bh);
1573 final_bh = bh;
1da177e4 1574
a47241cd
AT		 1575 loc.extLength -= sb->s_blocksize;
1576 loc.extLocation++;
1577 }
cb00ea35 1578
a47241cd
AT		 1579 if (!final_bh)
1580 return;
cb00ea35 1581
a47241cd
AT		 1582 brelse(sbi->s_lvid_bh);
1583 sbi->s_lvid_bh = final_bh;
1584
1585 lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data;
1586 if (lvid->nextIntegrityExt.extLength == 0)
1587 return;
1588
1589 loc = leea_to_cpu(lvid->nextIntegrityExt);
1da177e4 1590 }
a47241cd
AT		 1591
1592 udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n",
1593 UDF_MAX_LVID_NESTING);
1594 brelse(sbi->s_lvid_bh);
1595 sbi->s_lvid_bh = NULL;
1da177e4
LT		 1596}
1597
e7a4eb86 1598
1da177e4 1599/*
d759bfa4
JK		 1600 * Process a main/reserve volume descriptor sequence.
1601 * @block First block of first extent of the sequence.
1602 * @lastblock Lastblock of first extent of the sequence.
1603 * @fileset There we store extent containing root fileset
1da177e4 1604 *
d759bfa4
JK		 1605 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1606 * sequence
1da177e4 1607 */
d759bfa4
JK		 1608static noinline int udf_process_sequence(
1609 struct super_block *sb,
1610 sector_t block, sector_t lastblock,
1611 struct kernel_lb_addr *fileset)
1da177e4
LT		 1612{
1613 struct buffer_head *bh = NULL;
1614 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1615 struct udf_vds_record *curr;
1da177e4
LT		 1616 struct generic_desc *gd;
1617 struct volDescPtr *vdp;
2b8f9421 1618 bool done = false;
1da177e4
LT		 1619 uint32_t vdsn;
1620 uint16_t ident;
1621 long next_s = 0, next_e = 0;
d759bfa4 1622 int ret;
e7a4eb86 1623 unsigned int indirections = 0;
1da177e4
LT		 1624
1625 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1626
c0eb31ed
JK		 1627 /*
1628 * Read the main descriptor sequence and find which descriptors
1629 * are in it.
1630 */
cb00ea35 1631 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1632
1633 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1634 if (!bh) {
78ace70c
JP		 1635 udf_err(sb,
1636 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1637 (unsigned long long)block);
d759bfa4 1638 return -EAGAIN;
c0eb31ed 1639 }
1da177e4
LT		 1640
1641 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1642 gd = (struct generic_desc *)bh->b_data;
1643 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1644 switch (ident) {
28de7948 1645 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1646 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1647 if (vdsn >= curr->volDescSeqNum) {
1648 curr->volDescSeqNum = vdsn;
1649 curr->block = block;
cb00ea35
CG		 1650 }
1651 break;
28de7948 1652 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1653 curr = &vds[VDS_POS_VOL_DESC_PTR];
1654 if (vdsn >= curr->volDescSeqNum) {
1655 curr->volDescSeqNum = vdsn;
1656 curr->block = block;
cb00ea35
CG		 1657
1658 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1659 next_s = le32_to_cpu(
1660 vdp->nextVolDescSeqExt.extLocation);
1661 next_e = le32_to_cpu(
1662 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1663 next_e = next_e >> sb->s_blocksize_bits;
1664 next_e += next_s;
1665 }
1666 break;
28de7948 1667 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1668 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1669 if (vdsn >= curr->volDescSeqNum) {
1670 curr->volDescSeqNum = vdsn;
1671 curr->block = block;
cb00ea35
CG		 1672 }
1673 break;
28de7948 1674 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1675 curr = &vds[VDS_POS_PARTITION_DESC];
1676 if (!curr->block)
1677 curr->block = block;
cb00ea35 1678 break;
28de7948 1679 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1680 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1681 if (vdsn >= curr->volDescSeqNum) {
1682 curr->volDescSeqNum = vdsn;
1683 curr->block = block;
cb00ea35
CG		 1684 }
1685 break;
28de7948 1686 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1687 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1688 if (vdsn >= curr->volDescSeqNum) {
1689 curr->volDescSeqNum = vdsn;
1690 curr->block = block;
cb00ea35
CG		 1691 }
1692 break;
28de7948 1693 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
e7a4eb86
VN		 1694 if (++indirections > UDF_MAX_TD_NESTING) {
1695 udf_err(sb, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING);
1696 brelse(bh);
1697 return -EIO;
1698 }
1699
cb00ea35
CG		 1700 vds[VDS_POS_TERMINATING_DESC].block = block;
1701 if (next_e) {
1702 block = next_s;
1703 lastblock = next_e;
1704 next_s = next_e = 0;
4b11111a 1705 } else
2b8f9421 1706 done = true;
cb00ea35 1707 break;
1da177e4 1708 }
3bf25cb4 1709 brelse(bh);
1da177e4 1710 }
c0eb31ed
JK		 1711 /*
1712 * Now read interesting descriptors again and process them
1713 * in a suitable order
1714 */
1715 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1716 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1717 return -EAGAIN;
1718 }
1719 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1720 if (ret < 0)
1721 return ret;
1722
1723 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1724 ret = udf_load_logicalvol(sb,
1725 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1726 fileset);
1727 if (ret < 0)
1728 return ret;
c0eb31ed 1729 }
165923fa 1730
c0eb31ed
JK		 1731 if (vds[VDS_POS_PARTITION_DESC].block) {
1732 /*
1733 * We rescan the whole descriptor sequence to find
1734 * partition descriptor blocks and process them.
1735 */
1736 for (block = vds[VDS_POS_PARTITION_DESC].block;
1737 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1738 block++) {
1739 ret = udf_load_partdesc(sb, block);
1740 if (ret < 0)
1741 return ret;
1742 }
1da177e4
LT		 1743 }
1744
1745 return 0;
1746}
1747
d759bfa4
JK		 1748/*
1749 * Load Volume Descriptor Sequence described by anchor in bh
1750 *
1751 * Returns <0 on error, 0 on success
1752 */
40346005
JK		 1753static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1754 struct kernel_lb_addr *fileset)
1da177e4 1755{
40346005 1756 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1757 sector_t main_s, main_e, reserve_s, reserve_e;
1758 int ret;
1da177e4 1759
40346005
JK		 1760 anchor = (struct anchorVolDescPtr *)bh->b_data;
1761
1762 /* Locate the main sequence */
1763 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1764 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1765 main_e = main_e >> sb->s_blocksize_bits;
1766 main_e += main_s;
1767
1768 /* Locate the reserve sequence */
1769 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1770 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1771 reserve_e = reserve_e >> sb->s_blocksize_bits;
1772 reserve_e += reserve_s;
1773
1774 /* Process the main & reserve sequences */
1775 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1776 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1777 if (ret != -EAGAIN)
1778 return ret;
bff943af 1779 udf_sb_free_partitions(sb);
d759bfa4
JK		 1780 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1781 if (ret < 0) {
1782 udf_sb_free_partitions(sb);
1783 /* No sequence was OK, return -EIO */
1784 if (ret == -EAGAIN)
1785 ret = -EIO;
1786 }
1787 return ret;
1da177e4
LT		 1788}
1789
40346005
JK		 1790/*
1791 * Check whether there is an anchor block in the given block and
1792 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1793 *
1794 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1795 * block
40346005
JK		 1796 */
1797static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1798 struct kernel_lb_addr *fileset)
1197e4df 1799{
40346005
JK		 1800 struct buffer_head *bh;
1801 uint16_t ident;
1802 int ret;
1197e4df 1803
40346005
JK		 1804 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1805 udf_fixed_to_variable(block) >=
1806 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1807 return -EAGAIN;
40346005
JK		 1808
1809 bh = udf_read_tagged(sb, block, block, &ident);
1810 if (!bh)
d759bfa4 1811 return -EAGAIN;
40346005
JK		 1812 if (ident != TAG_IDENT_AVDP) {
1813 brelse(bh);
d759bfa4 1814 return -EAGAIN;
1197e4df 1815 }
40346005
JK		 1816 ret = udf_load_sequence(sb, bh, fileset);
1817 brelse(bh);
1818 return ret;
1197e4df
CL		 1819}
1820
d759bfa4
JK		 1821/*
1822 * Search for an anchor volume descriptor pointer.
1823 *
1824 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1825 * of anchors.
1826 */
1827static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1828 struct kernel_lb_addr *fileset)
1da177e4 1829{
40346005 1830 sector_t last[6];
38b74a53 1831 int i;
40346005
JK		 1832 struct udf_sb_info *sbi = UDF_SB(sb);
1833 int last_count = 0;
d759bfa4 1834 int ret;
1da177e4 1835
40346005
JK		 1836 /* First try user provided anchor */
1837 if (sbi->s_anchor) {
d759bfa4
JK		 1838 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1839 if (ret != -EAGAIN)
1840 return ret;
40346005
JK		 1841 }
1842 /*
1843 * according to spec, anchor is in either:
1844 * block 256
1845 * lastblock-256
1846 * lastblock
1847 * however, if the disc isn't closed, it could be 512.
1848 */
d759bfa4
JK		 1849 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1850 if (ret != -EAGAIN)
1851 return ret;
40346005
JK		 1852 /*
1853 * The trouble is which block is the last one. Drives often misreport
1854 * this so we try various possibilities.
1855 */
d759bfa4
JK		 1856 last[last_count++] = *lastblock;
1857 if (*lastblock >= 1)
1858 last[last_count++] = *lastblock - 1;
1859 last[last_count++] = *lastblock + 1;
1860 if (*lastblock >= 2)
1861 last[last_count++] = *lastblock - 2;
1862 if (*lastblock >= 150)
1863 last[last_count++] = *lastblock - 150;
1864 if (*lastblock >= 152)
1865 last[last_count++] = *lastblock - 152;
1da177e4 1866
40346005
JK		 1867 for (i = 0; i < last_count; i++) {
1868 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1869 sb->s_blocksize_bits)
28f7c4d4 1870 continue;
d759bfa4
JK		 1871 ret = udf_check_anchor_block(sb, last[i], fileset);
1872 if (ret != -EAGAIN) {
1873 if (!ret)
1874 *lastblock = last[i];
1875 return ret;
1876 }
40346005 1877 if (last[i] < 256)
28f7c4d4 1878 continue;
d759bfa4
JK		 1879 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1880 if (ret != -EAGAIN) {
1881 if (!ret)
1882 *lastblock = last[i];
1883 return ret;
1884 }
40346005 1885 }
28f7c4d4 1886
40346005 1887 /* Finally try block 512 in case media is open */
d759bfa4 1888 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1889}
28f7c4d4 1890
40346005
JK		 1891/*
1892 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1893 * area specified by it. The function expects sbi->s_lastblock to be the last
1894 * block on the media.
1895 *
d759bfa4
JK		 1896 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1897 * was not found.
40346005
JK		 1898 */
1899static int udf_find_anchor(struct super_block *sb,
1900 struct kernel_lb_addr *fileset)
1901{
40346005 1902 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1903 sector_t lastblock = sbi->s_last_block;
1904 int ret;
28f7c4d4 1905
d759bfa4
JK		 1906 ret = udf_scan_anchors(sb, &lastblock, fileset);
1907 if (ret != -EAGAIN)
40346005 1908 goto out;
1da177e4 1909
40346005
JK		 1910 /* No anchor found? Try VARCONV conversion of block numbers */
1911 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1912 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1913 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1914 ret = udf_scan_anchors(sb, &lastblock, fileset);
1915 if (ret != -EAGAIN)
40346005 1916 goto out;
1da177e4 1917
d759bfa4 1918 lastblock = sbi->s_last_block;
40346005 1919 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1920 ret = udf_scan_anchors(sb, &lastblock, fileset);
1921 if (ret < 0) {
40346005
JK		 1922 /* VARCONV didn't help. Clear it. */
1923 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1924 }
40346005 1925out:
d759bfa4
JK		 1926 if (ret == 0)
1927 sbi->s_last_block = lastblock;
1928 return ret;
40346005 1929}
1da177e4 1930
40346005
JK		 1931/*
1932 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1933 * Descriptor Sequence.
1934 *
1935 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1936 * block was not found.
40346005
JK		 1937 */
1938static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1939 int silent, struct kernel_lb_addr *fileset)
1940{
1941 struct udf_sb_info *sbi = UDF_SB(sb);
1942 loff_t nsr_off;
d759bfa4 1943 int ret;
40346005
JK		 1944
1945 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1946 if (!silent)
78ace70c 1947 udf_warn(sb, "Bad block size\n");
d759bfa4 1948 return -EINVAL;
40346005
JK		 1949 }
1950 sbi->s_last_block = uopt->lastblock;
1951 if (!uopt->novrs) {
1952 /* Check that it is NSR02 compliant */
1953 nsr_off = udf_check_vsd(sb);
1954 if (!nsr_off) {
1955 if (!silent)
78ace70c 1956 udf_warn(sb, "No VRS found\n");
40346005
JK		 1957 return 0;
1958 }
1959 if (nsr_off == -1)
44499602
PF		 1960 udf_debug("Failed to read sector at offset %d. "
1961 "Assuming open disc. Skipping validity "
1962 "check\n", VSD_FIRST_SECTOR_OFFSET);
40346005
JK		 1963 if (!sbi->s_last_block)
1964 sbi->s_last_block = udf_get_last_block(sb);
1965 } else {
1966 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1967 }
1da177e4 1968
40346005
JK		 1969 /* Look for anchor block and load Volume Descriptor Sequence */
1970 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1971 ret = udf_find_anchor(sb, fileset);
1972 if (ret < 0) {
1973 if (!silent && ret == -EAGAIN)
78ace70c 1974 udf_warn(sb, "No anchor found\n");
d759bfa4 1975 return ret;
40346005 1976 }
d759bfa4 1977 return 0;
1da177e4
LT		 1978}
1979
1980static void udf_open_lvid(struct super_block *sb)
1981{
6c79e987
MS		 1982 struct udf_sb_info *sbi = UDF_SB(sb);
1983 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1984 struct logicalVolIntegrityDesc *lvid;
1985 struct logicalVolIntegrityDescImpUse *lvidiu;
88b50ce3 1986 struct timespec ts;
146bca72 1987
165923fa
MS		 1988 if (!bh)
1989 return;
165923fa 1990 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
69d75671
JK		 1991 lvidiu = udf_sb_lvidiu(sb);
1992 if (!lvidiu)
1993 return;
165923fa 1994
69d75671 1995 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1996 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1997 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
88b50ce3
DD		 1998 ktime_get_real_ts(&ts);
1999 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
146bca72 2000 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 2001
2002 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 2003 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 2004 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 2005
2006 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2007 mark_buffer_dirty(bh);
146bca72 2008 sbi->s_lvid_dirty = 0;
949f4a7c 2009 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2010 /* Make opening of filesystem visible on the media immediately */
2011 sync_dirty_buffer(bh);
1da177e4
LT		 2012}
2013
2014static void udf_close_lvid(struct super_block *sb)
2015{
6c79e987
MS		 2016 struct udf_sb_info *sbi = UDF_SB(sb);
2017 struct buffer_head *bh = sbi->s_lvid_bh;
2018 struct logicalVolIntegrityDesc *lvid;
165923fa 2019 struct logicalVolIntegrityDescImpUse *lvidiu;
88b50ce3 2020 struct timespec ts;
28de7948 2021
6c79e987
MS		 2022 if (!bh)
2023 return;
69d75671
JK		 2024 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2025 lvidiu = udf_sb_lvidiu(sb);
2026 if (!lvidiu)
2027 return;
6c79e987 2028
949f4a7c 2029 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 2030 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2031 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
88b50ce3
DD		 2032 ktime_get_real_ts(&ts);
2033 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
165923fa
MS		 2034 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2035 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2036 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2037 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2038 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2039 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2040 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2041
2042 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 2043 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 2044 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 2045
2046 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 2047 /*
2048 * We set buffer uptodate unconditionally here to avoid spurious
2049 * warnings from mark_buffer_dirty() when previous EIO has marked
2050 * the buffer as !uptodate
2051 */
2052 set_buffer_uptodate(bh);
165923fa 2053 mark_buffer_dirty(bh);
146bca72 2054 sbi->s_lvid_dirty = 0;
949f4a7c 2055 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2056 /* Make closing of filesystem visible on the media immediately */
2057 sync_dirty_buffer(bh);
1da177e4
LT		 2058}
2059
d664b6af
JK		 2060u64 lvid_get_unique_id(struct super_block *sb)
2061{
2062 struct buffer_head *bh;
2063 struct udf_sb_info *sbi = UDF_SB(sb);
2064 struct logicalVolIntegrityDesc *lvid;
2065 struct logicalVolHeaderDesc *lvhd;
2066 u64 uniqueID;
2067 u64 ret;
2068
2069 bh = sbi->s_lvid_bh;
2070 if (!bh)
2071 return 0;
2072
2073 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2074 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2075
2076 mutex_lock(&sbi->s_alloc_mutex);
2077 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2078 if (!(++uniqueID & 0xFFFFFFFF))
2079 uniqueID += 16;
2080 lvhd->uniqueID = cpu_to_le64(uniqueID);
2081 mutex_unlock(&sbi->s_alloc_mutex);
2082 mark_buffer_dirty(bh);
2083
2084 return ret;
1da177e4
LT		 2085}
2086
1da177e4
LT		 2087static int udf_fill_super(struct super_block *sb, void *options, int silent)
2088{
d759bfa4 2089 int ret = -EINVAL;
cb00ea35 2090 struct inode *inode = NULL;
1da177e4 2091 struct udf_options uopt;
5ca4e4be 2092 struct kernel_lb_addr rootdir, fileset;
1da177e4 2093 struct udf_sb_info *sbi;
9181f8bf 2094 bool lvid_open = false;
1da177e4
LT		 2095
2096 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2097 uopt.uid = INVALID_UID;
2098 uopt.gid = INVALID_GID;
1da177e4 2099 uopt.umask = 0;
87bc730c
MS		 2100 uopt.fmode = UDF_INVALID_MODE;
2101 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2102
6c79e987 2103 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2104 if (!sbi)
1da177e4 2105 return -ENOMEM;
28de7948 2106
1da177e4 2107 sb->s_fs_info = sbi;
1da177e4 2108
1e7933de 2109 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2110
6da80894 2111 if (!udf_parse_options((char *)options, &uopt, false))
fdf2657b 2112 goto parse_options_failure;
1da177e4
LT		 2113
2114 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2115 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2116 udf_err(sb, "utf8 cannot be combined with iocharset\n");
fdf2657b 2117 goto parse_options_failure;
1da177e4
LT		 2118 }
2119#ifdef CONFIG_UDF_NLS
cb00ea35 2120 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2121 uopt.nls_map = load_nls_default();
2122 if (!uopt.nls_map)
2123 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2124 else
2125 udf_debug("Using default NLS map\n");
2126 }
2127#endif
2128 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2129 uopt.flags |= (1 << UDF_FLAG_UTF8);
2130
2131 fileset.logicalBlockNum = 0xFFFFFFFF;
2132 fileset.partitionReferenceNum = 0xFFFF;
2133
6c79e987
MS		 2134 sbi->s_flags = uopt.flags;
2135 sbi->s_uid = uopt.uid;
2136 sbi->s_gid = uopt.gid;
2137 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2138 sbi->s_fmode = uopt.fmode;
2139 sbi->s_dmode = uopt.dmode;
6c79e987 2140 sbi->s_nls_map = uopt.nls_map;
c03cad24 2141 rwlock_init(&sbi->s_cred_lock);
1da177e4 2142
cb00ea35 2143 if (uopt.session == 0xFFFFFFFF)
6c79e987 2144 sbi->s_session = udf_get_last_session(sb);
1da177e4 2145 else
6c79e987 2146 sbi->s_session = uopt.session;
1da177e4 2147
6c79e987 2148 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2149
40346005
JK		 2150 /* Fill in the rest of the superblock */
2151 sb->s_op = &udf_sb_ops;
2152 sb->s_export_op = &udf_export_ops;
123e9caf 2153
40346005
JK		 2154 sb->s_magic = UDF_SUPER_MAGIC;
2155 sb->s_time_gran = 1000;
2156
1197e4df 2157 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2158 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2159 } else {
e1defc4f 2160 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2161 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2162 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2163 if (!silent)
78ace70c
JP		 2164 pr_notice("Rescanning with blocksize %d\n",
2165 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2166 brelse(sbi->s_lvid_bh);
2167 sbi->s_lvid_bh = NULL;
1197e4df 2168 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2169 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2170 }
1da177e4 2171 }
d759bfa4
JK		 2172 if (ret < 0) {
2173 if (ret == -EAGAIN) {
2174 udf_warn(sb, "No partition found (1)\n");
2175 ret = -EINVAL;
2176 }
1da177e4
LT		 2177 goto error_out;
2178 }
2179
6c79e987 2180 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2181
6c79e987 2182 if (sbi->s_lvid_bh) {
4b11111a 2183 struct logicalVolIntegrityDescImpUse *lvidiu =
69d75671
JK		 2184 udf_sb_lvidiu(sb);
2185 uint16_t minUDFReadRev;
2186 uint16_t minUDFWriteRev;
1da177e4 2187
69d75671
JK		 2188 if (!lvidiu) {
2189 ret = -EINVAL;
2190 goto error_out;
2191 }
2192 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2193 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
cb00ea35 2194 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c 2195 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
69d75671 2196 minUDFReadRev,
78ace70c 2197 UDF_MAX_READ_VERSION);
d759bfa4 2198 ret = -EINVAL;
1da177e4 2199 goto error_out;
e729eac6
JK		 2200 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2201 !(sb->s_flags & MS_RDONLY)) {
2202 ret = -EACCES;
2203 goto error_out;
2204 }
1da177e4 2205
6c79e987 2206 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2207
2208 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2209 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2210 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2211 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2212 }
2213
6c79e987 2214 if (!sbi->s_partitions) {
78ace70c 2215 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2216 ret = -EINVAL;
1da177e4
LT		 2217 goto error_out;
2218 }
2219
4b11111a 2220 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
e729eac6
JK		 2221 UDF_PART_FLAG_READ_ONLY &&
2222 !(sb->s_flags & MS_RDONLY)) {
2223 ret = -EACCES;
2224 goto error_out;
c1a26e7d 2225 }
39b3f6d6 2226
cb00ea35 2227 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2228 udf_warn(sb, "No fileset found\n");
d759bfa4 2229 ret = -EINVAL;
1da177e4
LT		 2230 goto error_out;
2231 }
2232
cb00ea35 2233 if (!silent) {
5ca4e4be 2234 struct timestamp ts;
56774805 2235 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2236 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2237 sbi->s_volume_ident,
2238 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2239 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4 2240 }
9181f8bf 2241 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4 2242 udf_open_lvid(sb);
9181f8bf
JK		 2243 lvid_open = true;
2244 }
1da177e4
LT		 2245
2246 /* Assign the root inode */
2247 /* assign inodes by physical block number */
2248 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2249 inode = udf_iget(sb, &rootdir);
6d3d5e86 2250 if (IS_ERR(inode)) {
78ace70c 2251 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2252 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
6d3d5e86 2253 ret = PTR_ERR(inode);
1da177e4
LT		 2254 goto error_out;
2255 }
2256
2257 /* Allocate a dentry for the root inode */
48fde701 2258 sb->s_root = d_make_root(inode);
cb00ea35 2259 if (!sb->s_root) {
78ace70c 2260 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2261 ret = -ENOMEM;
1da177e4
LT		 2262 goto error_out;
2263 }
31170b6a 2264 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2265 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2266 return 0;
2267
28de7948 2268error_out:
0d454e4a 2269 iput(sbi->s_vat_inode);
fdf2657b 2270parse_options_failure:
1da177e4
LT		 2271#ifdef CONFIG_UDF_NLS
2272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2273 unload_nls(sbi->s_nls_map);
1da177e4 2274#endif
9181f8bf 2275 if (lvid_open)
1da177e4 2276 udf_close_lvid(sb);
6c79e987 2277 brelse(sbi->s_lvid_bh);
bff943af 2278 udf_sb_free_partitions(sb);
1da177e4
LT		 2279 kfree(sbi);
2280 sb->s_fs_info = NULL;
28de7948 2281
d759bfa4 2282 return ret;
1da177e4
LT		 2283}
2284
8076c363
JP		 2285void _udf_err(struct super_block *sb, const char *function,
2286 const char *fmt, ...)
1da177e4 2287{
c2bff36c 2288 struct va_format vaf;
1da177e4
LT		 2289 va_list args;
2290
1da177e4 2291 va_start(args, fmt);
c2bff36c
JP		 2292
2293 vaf.fmt = fmt;
2294 vaf.va = &args;
2295
2296 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2297
1da177e4 2298 va_end(args);
1da177e4
LT		 2299}
2300
a40ecd7b
JP		 2301void _udf_warn(struct super_block *sb, const char *function,
2302 const char *fmt, ...)
1da177e4 2303{
c2bff36c 2304 struct va_format vaf;
1da177e4
LT		 2305 va_list args;
2306
cb00ea35 2307 va_start(args, fmt);
c2bff36c
JP		 2308
2309 vaf.fmt = fmt;
2310 vaf.va = &args;
2311
2312 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2313
1da177e4 2314 va_end(args);
1da177e4
LT		 2315}
2316
cb00ea35 2317static void udf_put_super(struct super_block *sb)
1da177e4 2318{
6c79e987 2319 struct udf_sb_info *sbi;
1da177e4 2320
6c79e987 2321 sbi = UDF_SB(sb);
6cfd0148 2322
0d454e4a 2323 iput(sbi->s_vat_inode);
1da177e4
LT		 2324#ifdef CONFIG_UDF_NLS
2325 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2326 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2327#endif
2328 if (!(sb->s_flags & MS_RDONLY))
2329 udf_close_lvid(sb);
6c79e987 2330 brelse(sbi->s_lvid_bh);
bff943af 2331 udf_sb_free_partitions(sb);
bbe48dd8 2332 mutex_destroy(&sbi->s_alloc_mutex);
1da177e4
LT		 2333 kfree(sb->s_fs_info);
2334 sb->s_fs_info = NULL;
2335}
2336
146bca72
JK		 2337static int udf_sync_fs(struct super_block *sb, int wait)
2338{
2339 struct udf_sb_info *sbi = UDF_SB(sb);
2340
2341 mutex_lock(&sbi->s_alloc_mutex);
2342 if (sbi->s_lvid_dirty) {
2343 /*
2344 * Blockdevice will be synced later so we don't have to submit
2345 * the buffer for IO
2346 */
2347 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2348 sbi->s_lvid_dirty = 0;
2349 }
2350 mutex_unlock(&sbi->s_alloc_mutex);
2351
2352 return 0;
2353}
2354
cb00ea35 2355static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2356{
726c3342 2357 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2358 struct udf_sb_info *sbi = UDF_SB(sb);
2359 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2360 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987 2361
69d75671 2362 lvidiu = udf_sb_lvidiu(sb);
1da177e4
LT		 2363 buf->f_type = UDF_SUPER_MAGIC;
2364 buf->f_bsize = sb->s_blocksize;
6c79e987 2365 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2366 buf->f_bfree = udf_count_free(sb);
2367 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2368 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2369 le32_to_cpu(lvidiu->numDirs)) : 0)
2370 + buf->f_bfree;
1da177e4 2371 buf->f_ffree = buf->f_bfree;
9fba7056 2372 buf->f_namelen = UDF_NAME_LEN;
557f5a14
CL		 2373 buf->f_fsid.val[0] = (u32)id;
2374 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2375
2376 return 0;
2377}
2378
4b11111a
MS		 2379static unsigned int udf_count_free_bitmap(struct super_block *sb,
2380 struct udf_bitmap *bitmap)
1da177e4
LT		 2381{
2382 struct buffer_head *bh = NULL;
2383 unsigned int accum = 0;
2384 int index;
2385 int block = 0, newblock;
5ca4e4be 2386 struct kernel_lb_addr loc;
1da177e4 2387 uint32_t bytes;
1da177e4
LT		 2388 uint8_t *ptr;
2389 uint16_t ident;
2390 struct spaceBitmapDesc *bm;
2391
1da177e4 2392 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2393 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2394 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2395
cb00ea35 2396 if (!bh) {
78ace70c 2397 udf_err(sb, "udf_count_free failed\n");
1da177e4 2398 goto out;
cb00ea35 2399 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2400 brelse(bh);
78ace70c 2401 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2402 goto out;
2403 }
2404
2405 bm = (struct spaceBitmapDesc *)bh->b_data;
2406 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2407 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2408 ptr = (uint8_t *)bh->b_data;
1da177e4 2409
cb00ea35 2410 while (bytes > 0) {
01b954a3
MS		 2411 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2412 accum += bitmap_weight((const unsigned long *)(ptr + index),
2413 cur_bytes * 8);
2414 bytes -= cur_bytes;
cb00ea35 2415 if (bytes) {
3bf25cb4 2416 brelse(bh);
97e961fd 2417 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2418 bh = udf_tread(sb, newblock);
cb00ea35 2419 if (!bh) {
1da177e4
LT		 2420 udf_debug("read failed\n");
2421 goto out;
2422 }
2423 index = 0;
28de7948 2424 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2425 }
2426 }
3bf25cb4 2427 brelse(bh);
28de7948 2428out:
1da177e4
LT		 2429 return accum;
2430}
2431
4b11111a
MS		 2432static unsigned int udf_count_free_table(struct super_block *sb,
2433 struct inode *table)
1da177e4
LT		 2434{
2435 unsigned int accum = 0;
ff116fc8 2436 uint32_t elen;
5ca4e4be 2437 struct kernel_lb_addr eloc;
1da177e4 2438 int8_t etype;
ff116fc8 2439 struct extent_position epos;
1da177e4 2440
d1668fe3 2441 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2442 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2443 epos.offset = sizeof(struct unallocSpaceEntry);
2444 epos.bh = NULL;
1da177e4 2445
3a71fc5d 2446 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2447 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2448
3bf25cb4 2449 brelse(epos.bh);
d1668fe3 2450 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2451
2452 return accum;
2453}
cb00ea35
CG		 2454
2455static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2456{
2457 unsigned int accum = 0;
6c79e987
MS		 2458 struct udf_sb_info *sbi;
2459 struct udf_part_map *map;
1da177e4 2460
6c79e987
MS		 2461 sbi = UDF_SB(sb);
2462 if (sbi->s_lvid_bh) {
4b11111a
MS		 2463 struct logicalVolIntegrityDesc *lvid =
2464 (struct logicalVolIntegrityDesc *)
2465 sbi->s_lvid_bh->b_data;
6c79e987 2466 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2467 accum = le32_to_cpu(
2468 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2469 if (accum == 0xFFFFFFFF)
2470 accum = 0;
2471 }
2472 }
2473
2474 if (accum)
2475 return accum;
2476
6c79e987
MS		 2477 map = &sbi->s_partmaps[sbi->s_partition];
2478 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2479 accum += udf_count_free_bitmap(sb,
6c79e987 2480 map->s_uspace.s_bitmap);
1da177e4 2481 }
6c79e987 2482 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2483 accum += udf_count_free_bitmap(sb,
6c79e987 2484 map->s_fspace.s_bitmap);
1da177e4
LT		 2485 }
2486 if (accum)
2487 return accum;
2488
6c79e987 2489 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2490 accum += udf_count_free_table(sb,
6c79e987 2491 map->s_uspace.s_table);
1da177e4 2492 }
6c79e987 2493 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2494 accum += udf_count_free_table(sb,
6c79e987 2495 map->s_fspace.s_table);
1da177e4
LT		 2496 }
2497
2498 return accum;
2499}
54bb60d5
FF		 2500
2501MODULE_AUTHOR("Ben Fennema");
2502MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2503MODULE_LICENSE("GPL");
2504module_init(init_udf_fs)
2505module_exit(exit_udf_fs)
Ubuntu Hirsute Linux kernel mirror