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udf: Standardize return values in mount sequence
[linux-2.6-block.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
8de52778
AV		 79enum { UDF_MAX_LINKS = 0xffff };
80
1da177e4
LT		 81/* These are the "meat" - everything else is stuffing */
82static int udf_fill_super(struct super_block *, void *, int);
83static void udf_put_super(struct super_block *);
146bca72 84static int udf_sync_fs(struct super_block *, int);
1da177e4 85static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 86static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 87static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
cb00ea35 89static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 90 struct kernel_lb_addr *);
1da177e4
LT		 91static void udf_open_lvid(struct super_block *);
92static void udf_close_lvid(struct super_block *);
93static unsigned int udf_count_free(struct super_block *);
726c3342 94static int udf_statfs(struct dentry *, struct kstatfs *);
34c80b1d 95static int udf_show_options(struct seq_file *, struct dentry *);
1da177e4 96
6c79e987
MS		 97struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
98{
4b11111a
MS		 99 struct logicalVolIntegrityDesc *lvid =
100 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
6c79e987 101 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
4b11111a
MS		 102 __u32 offset = number_of_partitions * 2 *
103 sizeof(uint32_t)/sizeof(uint8_t);
6c79e987
MS		 104 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
105}
106
1da177e4 107/* UDF filesystem type */
152a0836
AV		 108static struct dentry *udf_mount(struct file_system_type *fs_type,
109 int flags, const char *dev_name, void *data)
1da177e4 110{
152a0836 111 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 112}
113
114static struct file_system_type udf_fstype = {
28de7948
CG		 115 .owner = THIS_MODULE,
116 .name = "udf",
152a0836 117 .mount = udf_mount,
28de7948
CG		 118 .kill_sb = kill_block_super,
119 .fs_flags = FS_REQUIRES_DEV,
1da177e4 120};
3e64fe5b 121MODULE_ALIAS_FS("udf");
1da177e4 122
cb00ea35 123static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 124
125static struct inode *udf_alloc_inode(struct super_block *sb)
126{
127 struct udf_inode_info *ei;
3a71fc5d 128 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 129 if (!ei)
130 return NULL;
95f8797f
DB		 131
132 ei->i_unique = 0;
133 ei->i_lenExtents = 0;
134 ei->i_next_alloc_block = 0;
135 ei->i_next_alloc_goal = 0;
136 ei->i_strat4096 = 0;
4d0fb621 137 init_rwsem(&ei->i_data_sem);
99600051
NJ		 138 ei->cached_extent.lstart = -1;
139 spin_lock_init(&ei->i_extent_cache_lock);
95f8797f 140
1da177e4
LT		 141 return &ei->vfs_inode;
142}
143
fa0d7e3d 144static void udf_i_callback(struct rcu_head *head)
1da177e4 145{
fa0d7e3d 146 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 147 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
148}
149
fa0d7e3d
NP		 150static void udf_destroy_inode(struct inode *inode)
151{
152 call_rcu(&inode->i_rcu, udf_i_callback);
153}
154
51cc5068 155static void init_once(void *foo)
1da177e4 156{
cb00ea35 157 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 158
a35afb83
CL		 159 ei->i_ext.i_data = NULL;
160 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 161}
162
163static int init_inodecache(void)
164{
165 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
166 sizeof(struct udf_inode_info),
cb00ea35
CG		 167 0, (SLAB_RECLAIM_ACCOUNT |
168 SLAB_MEM_SPREAD),
20c2df83 169 init_once);
28de7948 170 if (!udf_inode_cachep)
1da177e4
LT		 171 return -ENOMEM;
172 return 0;
173}
174
175static void destroy_inodecache(void)
176{
8c0a8537
KS		 177 /*
178 * Make sure all delayed rcu free inodes are flushed before we
179 * destroy cache.
180 */
181 rcu_barrier();
1a1d92c1 182 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 183}
184
185/* Superblock operations */
ee9b6d61 186static const struct super_operations udf_sb_ops = {
28de7948
CG		 187 .alloc_inode = udf_alloc_inode,
188 .destroy_inode = udf_destroy_inode,
189 .write_inode = udf_write_inode,
3aac2b62 190 .evict_inode = udf_evict_inode,
28de7948 191 .put_super = udf_put_super,
146bca72 192 .sync_fs = udf_sync_fs,
28de7948
CG		 193 .statfs = udf_statfs,
194 .remount_fs = udf_remount_fs,
6da80894 195 .show_options = udf_show_options,
1da177e4
LT		 196};
197
cb00ea35 198struct udf_options {
1da177e4
LT		 199 unsigned char novrs;
200 unsigned int blocksize;
201 unsigned int session;
202 unsigned int lastblock;
203 unsigned int anchor;
204 unsigned int volume;
205 unsigned short partition;
206 unsigned int fileset;
207 unsigned int rootdir;
208 unsigned int flags;
faa17292 209 umode_t umask;
c2ba138a
EB		 210 kgid_t gid;
211 kuid_t uid;
faa17292
AV		 212 umode_t fmode;
213 umode_t dmode;
1da177e4
LT		 214 struct nls_table *nls_map;
215};
216
217static int __init init_udf_fs(void)
218{
219 int err;
28de7948 220
1da177e4
LT		 221 err = init_inodecache();
222 if (err)
223 goto out1;
224 err = register_filesystem(&udf_fstype);
225 if (err)
226 goto out;
28de7948 227
1da177e4 228 return 0;
28de7948
CG		 229
230out:
1da177e4 231 destroy_inodecache();
28de7948
CG		 232
233out1:
1da177e4
LT		 234 return err;
235}
236
237static void __exit exit_udf_fs(void)
238{
239 unregister_filesystem(&udf_fstype);
240 destroy_inodecache();
241}
242
243module_init(init_udf_fs)
28de7948 244module_exit(exit_udf_fs)
1da177e4 245
dc5d39be
MS		 246static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
247{
248 struct udf_sb_info *sbi = UDF_SB(sb);
249
250 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
251 GFP_KERNEL);
252 if (!sbi->s_partmaps) {
8076c363
JP		 253 udf_err(sb, "Unable to allocate space for %d partition maps\n",
254 count);
dc5d39be
MS		 255 sbi->s_partitions = 0;
256 return -ENOMEM;
257 }
258
259 sbi->s_partitions = count;
260 return 0;
261}
262
bff943af
JK		 263static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
264{
265 int i;
266 int nr_groups = bitmap->s_nr_groups;
267 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
268 nr_groups);
269
270 for (i = 0; i < nr_groups; i++)
271 if (bitmap->s_block_bitmap[i])
272 brelse(bitmap->s_block_bitmap[i]);
273
274 if (size <= PAGE_SIZE)
275 kfree(bitmap);
276 else
277 vfree(bitmap);
278}
279
280static void udf_free_partition(struct udf_part_map *map)
281{
282 int i;
283 struct udf_meta_data *mdata;
284
285 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
286 iput(map->s_uspace.s_table);
287 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
288 iput(map->s_fspace.s_table);
289 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
290 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
291 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
292 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
293 if (map->s_partition_type == UDF_SPARABLE_MAP15)
294 for (i = 0; i < 4; i++)
295 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
296 else if (map->s_partition_type == UDF_METADATA_MAP25) {
297 mdata = &map->s_type_specific.s_metadata;
298 iput(mdata->s_metadata_fe);
299 mdata->s_metadata_fe = NULL;
300
301 iput(mdata->s_mirror_fe);
302 mdata->s_mirror_fe = NULL;
303
304 iput(mdata->s_bitmap_fe);
305 mdata->s_bitmap_fe = NULL;
306 }
307}
308
309static void udf_sb_free_partitions(struct super_block *sb)
310{
311 struct udf_sb_info *sbi = UDF_SB(sb);
312 int i;
1b1baff6
NJ		 313 if (sbi->s_partmaps == NULL)
314 return;
bff943af
JK		 315 for (i = 0; i < sbi->s_partitions; i++)
316 udf_free_partition(&sbi->s_partmaps[i]);
317 kfree(sbi->s_partmaps);
318 sbi->s_partmaps = NULL;
319}
320
34c80b1d 321static int udf_show_options(struct seq_file *seq, struct dentry *root)
6da80894 322{
34c80b1d 323 struct super_block *sb = root->d_sb;
6da80894
MS		 324 struct udf_sb_info *sbi = UDF_SB(sb);
325
326 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
327 seq_puts(seq, ",nostrict");
1197e4df 328 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 329 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
330 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
331 seq_puts(seq, ",unhide");
332 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
333 seq_puts(seq, ",undelete");
334 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
335 seq_puts(seq, ",noadinicb");
336 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
337 seq_puts(seq, ",shortad");
338 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
339 seq_puts(seq, ",uid=forget");
340 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
341 seq_puts(seq, ",uid=ignore");
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
343 seq_puts(seq, ",gid=forget");
344 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
345 seq_puts(seq, ",gid=ignore");
346 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
c2ba138a 347 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
6da80894 348 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
c2ba138a 349 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
6da80894 350 if (sbi->s_umask != 0)
faa17292 351 seq_printf(seq, ",umask=%ho", sbi->s_umask);
87bc730c 352 if (sbi->s_fmode != UDF_INVALID_MODE)
faa17292 353 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
87bc730c 354 if (sbi->s_dmode != UDF_INVALID_MODE)
faa17292 355 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
6da80894
MS		 356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
357 seq_printf(seq, ",session=%u", sbi->s_session);
358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
359 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 360 if (sbi->s_anchor != 0)
361 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 362 /*
363 * volume, partition, fileset and rootdir seem to be ignored
364 * currently
365 */
366 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
367 seq_puts(seq, ",utf8");
368 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
369 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
370
371 return 0;
372}
373
1da177e4
LT		 374/*
375 * udf_parse_options
376 *
377 * PURPOSE
378 * Parse mount options.
379 *
380 * DESCRIPTION
381 * The following mount options are supported:
382 *
383 * gid= Set the default group.
384 * umask= Set the default umask.
7ac9bcd5
MS		 385 * mode= Set the default file permissions.
386 * dmode= Set the default directory permissions.
1da177e4
LT		 387 * uid= Set the default user.
388 * bs= Set the block size.
389 * unhide Show otherwise hidden files.
390 * undelete Show deleted files in lists.
391 * adinicb Embed data in the inode (default)
392 * noadinicb Don't embed data in the inode
393 * shortad Use short ad's
394 * longad Use long ad's (default)
395 * nostrict Unset strict conformance
396 * iocharset= Set the NLS character set
397 *
398 * The remaining are for debugging and disaster recovery:
399 *
28de7948 400 * novrs Skip volume sequence recognition
1da177e4
LT		 401 *
402 * The following expect a offset from 0.
403 *
404 * session= Set the CDROM session (default= last session)
405 * anchor= Override standard anchor location. (default= 256)
406 * volume= Override the VolumeDesc location. (unused)
407 * partition= Override the PartitionDesc location. (unused)
408 * lastblock= Set the last block of the filesystem/
409 *
410 * The following expect a offset from the partition root.
411 *
412 * fileset= Override the fileset block location. (unused)
413 * rootdir= Override the root directory location. (unused)
414 * WARNING: overriding the rootdir to a non-directory may
415 * yield highly unpredictable results.
416 *
417 * PRE-CONDITIONS
418 * options Pointer to mount options string.
419 * uopts Pointer to mount options variable.
420 *
421 * POST-CONDITIONS
422 * <return> 1 Mount options parsed okay.
423 * <return> 0 Error parsing mount options.
424 *
425 * HISTORY
426 * July 1, 1997 - Andrew E. Mileski
427 * Written, tested, and released.
428 */
28de7948 429
1da177e4
LT		 430enum {
431 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
432 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
433 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
434 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
435 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 436 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
437 Opt_fmode, Opt_dmode
1da177e4
LT		 438};
439
a447c093 440static const match_table_t tokens = {
28de7948
CG		 441 {Opt_novrs, "novrs"},
442 {Opt_nostrict, "nostrict"},
443 {Opt_bs, "bs=%u"},
444 {Opt_unhide, "unhide"},
445 {Opt_undelete, "undelete"},
446 {Opt_noadinicb, "noadinicb"},
447 {Opt_adinicb, "adinicb"},
448 {Opt_shortad, "shortad"},
449 {Opt_longad, "longad"},
450 {Opt_uforget, "uid=forget"},
451 {Opt_uignore, "uid=ignore"},
452 {Opt_gforget, "gid=forget"},
453 {Opt_gignore, "gid=ignore"},
454 {Opt_gid, "gid=%u"},
455 {Opt_uid, "uid=%u"},
456 {Opt_umask, "umask=%o"},
457 {Opt_session, "session=%u"},
458 {Opt_lastblock, "lastblock=%u"},
459 {Opt_anchor, "anchor=%u"},
460 {Opt_volume, "volume=%u"},
461 {Opt_partition, "partition=%u"},
462 {Opt_fileset, "fileset=%u"},
463 {Opt_rootdir, "rootdir=%u"},
464 {Opt_utf8, "utf8"},
465 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 466 {Opt_fmode, "mode=%o"},
467 {Opt_dmode, "dmode=%o"},
28de7948 468 {Opt_err, NULL}
1da177e4
LT		 469};
470
6da80894
MS		 471static int udf_parse_options(char *options, struct udf_options *uopt,
472 bool remount)
1da177e4
LT		 473{
474 char *p;
475 int option;
476
477 uopt->novrs = 0;
1da177e4
LT		 478 uopt->partition = 0xFFFF;
479 uopt->session = 0xFFFFFFFF;
480 uopt->lastblock = 0;
481 uopt->anchor = 0;
482 uopt->volume = 0xFFFFFFFF;
483 uopt->rootdir = 0xFFFFFFFF;
484 uopt->fileset = 0xFFFFFFFF;
485 uopt->nls_map = NULL;
486
487 if (!options)
488 return 1;
489
cb00ea35 490 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 491 substring_t args[MAX_OPT_ARGS];
492 int token;
493 if (!*p)
494 continue;
495
496 token = match_token(p, tokens, args);
cb00ea35
CG		 497 switch (token) {
498 case Opt_novrs:
499 uopt->novrs = 1;
4136801a 500 break;
cb00ea35
CG		 501 case Opt_bs:
502 if (match_int(&args[0], &option))
503 return 0;
504 uopt->blocksize = option;
1197e4df 505 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 506 break;
507 case Opt_unhide:
508 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
509 break;
510 case Opt_undelete:
511 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
512 break;
513 case Opt_noadinicb:
514 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
515 break;
516 case Opt_adinicb:
517 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
518 break;
519 case Opt_shortad:
520 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
521 break;
522 case Opt_longad:
523 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
524 break;
525 case Opt_gid:
526 if (match_int(args, &option))
527 return 0;
c2ba138a
EB		 528 uopt->gid = make_kgid(current_user_ns(), option);
529 if (!gid_valid(uopt->gid))
530 return 0;
ca76d2d8 531 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 532 break;
533 case Opt_uid:
534 if (match_int(args, &option))
535 return 0;
c2ba138a
EB		 536 uopt->uid = make_kuid(current_user_ns(), option);
537 if (!uid_valid(uopt->uid))
538 return 0;
ca76d2d8 539 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 540 break;
541 case Opt_umask:
542 if (match_octal(args, &option))
543 return 0;
544 uopt->umask = option;
545 break;
546 case Opt_nostrict:
547 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
548 break;
549 case Opt_session:
550 if (match_int(args, &option))
551 return 0;
552 uopt->session = option;
6da80894
MS		 553 if (!remount)
554 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 555 break;
556 case Opt_lastblock:
557 if (match_int(args, &option))
558 return 0;
559 uopt->lastblock = option;
6da80894
MS		 560 if (!remount)
561 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 562 break;
563 case Opt_anchor:
564 if (match_int(args, &option))
565 return 0;
566 uopt->anchor = option;
567 break;
568 case Opt_volume:
569 if (match_int(args, &option))
570 return 0;
571 uopt->volume = option;
572 break;
573 case Opt_partition:
574 if (match_int(args, &option))
575 return 0;
576 uopt->partition = option;
577 break;
578 case Opt_fileset:
579 if (match_int(args, &option))
580 return 0;
581 uopt->fileset = option;
582 break;
583 case Opt_rootdir:
584 if (match_int(args, &option))
585 return 0;
586 uopt->rootdir = option;
587 break;
588 case Opt_utf8:
589 uopt->flags |= (1 << UDF_FLAG_UTF8);
590 break;
1da177e4 591#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 592 case Opt_iocharset:
593 uopt->nls_map = load_nls(args[0].from);
594 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
595 break;
1da177e4 596#endif
cb00ea35
CG		 597 case Opt_uignore:
598 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
599 break;
600 case Opt_uforget:
601 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
602 break;
603 case Opt_gignore:
604 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
605 break;
606 case Opt_gforget:
607 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
608 break;
7ac9bcd5
MS		 609 case Opt_fmode:
610 if (match_octal(args, &option))
611 return 0;
612 uopt->fmode = option & 0777;
613 break;
614 case Opt_dmode:
615 if (match_octal(args, &option))
616 return 0;
617 uopt->dmode = option & 0777;
618 break;
cb00ea35 619 default:
78ace70c 620 pr_err("bad mount option \"%s\" or missing value\n", p);
1da177e4
LT		 621 return 0;
622 }
623 }
624 return 1;
625}
626
cb00ea35 627static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 628{
629 struct udf_options uopt;
6c79e987 630 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 631 int error = 0;
1da177e4 632
6c79e987
MS		 633 uopt.flags = sbi->s_flags;
634 uopt.uid = sbi->s_uid;
635 uopt.gid = sbi->s_gid;
636 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 637 uopt.fmode = sbi->s_fmode;
638 uopt.dmode = sbi->s_dmode;
1da177e4 639
6da80894 640 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 641 return -EINVAL;
642
c03cad24 643 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 644 sbi->s_flags = uopt.flags;
645 sbi->s_uid = uopt.uid;
646 sbi->s_gid = uopt.gid;
647 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 648 sbi->s_fmode = uopt.fmode;
649 sbi->s_dmode = uopt.dmode;
c03cad24 650 write_unlock(&sbi->s_cred_lock);
1da177e4 651
6c79e987
MS		 652 if (sbi->s_lvid_bh) {
653 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
1da177e4
LT		 654 if (write_rev > UDF_MAX_WRITE_VERSION)
655 *flags |= MS_RDONLY;
656 }
657
c79d967d
CH		 658 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
659 goto out_unlock;
660
36350462 661 if (*flags & MS_RDONLY)
1da177e4 662 udf_close_lvid(sb);
36350462 663 else
1da177e4
LT		 664 udf_open_lvid(sb);
665
c79d967d 666out_unlock:
c79d967d 667 return error;
1da177e4
LT		 668}
669
40346005
JK		 670/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
671/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
672static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 673{
674 struct volStructDesc *vsd = NULL;
f4bcbbd9 675 loff_t sector = 32768;
1da177e4
LT		 676 int sectorsize;
677 struct buffer_head *bh = NULL;
cb00ea35
CG		 678 int nsr02 = 0;
679 int nsr03 = 0;
6c79e987 680 struct udf_sb_info *sbi;
1da177e4 681
6c79e987 682 sbi = UDF_SB(sb);
1da177e4
LT		 683 if (sb->s_blocksize < sizeof(struct volStructDesc))
684 sectorsize = sizeof(struct volStructDesc);
685 else
686 sectorsize = sb->s_blocksize;
687
6c79e987 688 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 689
690 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 691 (unsigned int)(sector >> sb->s_blocksize_bits),
692 sb->s_blocksize);
1da177e4 693 /* Process the sequence (if applicable) */
cb00ea35 694 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 695 /* Read a block */
696 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
697 if (!bh)
698 break;
699
700 /* Look for ISO descriptors */
701 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 702 (sector & (sb->s_blocksize - 1)));
1da177e4 703
cb00ea35 704 if (vsd->stdIdent[0] == 0) {
3bf25cb4 705 brelse(bh);
1da177e4 706 break;
3a71fc5d
MS		 707 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
708 VSD_STD_ID_LEN)) {
cb00ea35
CG		 709 switch (vsd->structType) {
710 case 0:
711 udf_debug("ISO9660 Boot Record found\n");
712 break;
713 case 1:
a983f368 714 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 715 break;
716 case 2:
a983f368 717 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 718 break;
719 case 3:
a983f368 720 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 721 break;
722 case 255:
a983f368 723 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 724 break;
725 default:
726 udf_debug("ISO9660 VRS (%u) found\n",
727 vsd->structType);
728 break;
1da177e4 729 }
3a71fc5d
MS		 730 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
731 VSD_STD_ID_LEN))
732 ; /* nothing */
733 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
734 VSD_STD_ID_LEN)) {
3bf25cb4 735 brelse(bh);
1da177e4 736 break;
3a71fc5d
MS		 737 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
738 VSD_STD_ID_LEN))
1da177e4 739 nsr02 = sector;
3a71fc5d
MS		 740 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
741 VSD_STD_ID_LEN))
1da177e4 742 nsr03 = sector;
3bf25cb4 743 brelse(bh);
1da177e4
LT		 744 }
745
746 if (nsr03)
747 return nsr03;
748 else if (nsr02)
749 return nsr02;
6c79e987 750 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 751 return -1;
752 else
753 return 0;
754}
755
3a71fc5d 756static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 757 struct kernel_lb_addr *fileset,
758 struct kernel_lb_addr *root)
1da177e4
LT		 759{
760 struct buffer_head *bh = NULL;
761 long lastblock;
762 uint16_t ident;
6c79e987 763 struct udf_sb_info *sbi;
1da177e4
LT		 764
765 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 766 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 767 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 768
28de7948 769 if (!bh) {
1da177e4 770 return 1;
28de7948 771 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 772 brelse(bh);
1da177e4
LT		 773 return 1;
774 }
cb00ea35 775
1da177e4
LT		 776 }
777
6c79e987 778 sbi = UDF_SB(sb);
3a71fc5d
MS		 779 if (!bh) {
780 /* Search backwards through the partitions */
5ca4e4be 781 struct kernel_lb_addr newfileset;
1da177e4 782
28de7948 783/* --> cvg: FIXME - is it reasonable? */
1da177e4 784 return 1;
cb00ea35 785
6c79e987 786 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 787 (newfileset.partitionReferenceNum != 0xFFFF &&
788 fileset->logicalBlockNum == 0xFFFFFFFF &&
789 fileset->partitionReferenceNum == 0xFFFF);
790 newfileset.partitionReferenceNum--) {
6c79e987
MS		 791 lastblock = sbi->s_partmaps
792 [newfileset.partitionReferenceNum]
793 .s_partition_len;
1da177e4
LT		 794 newfileset.logicalBlockNum = 0;
795
cb00ea35 796 do {
97e961fd 797 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 798 &ident);
cb00ea35
CG		 799 if (!bh) {
800 newfileset.logicalBlockNum++;
1da177e4
LT		 801 continue;
802 }
803
cb00ea35
CG		 804 switch (ident) {
805 case TAG_IDENT_SBD:
28de7948
CG		 806 {
807 struct spaceBitmapDesc *sp;
4b11111a
MS		 808 sp = (struct spaceBitmapDesc *)
809 bh->b_data;
28de7948
CG		 810 newfileset.logicalBlockNum += 1 +
811 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 812 sizeof(struct spaceBitmapDesc)
813 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 814 brelse(bh);
815 break;
816 }
cb00ea35 817 case TAG_IDENT_FSD:
28de7948
CG		 818 *fileset = newfileset;
819 break;
cb00ea35 820 default:
28de7948
CG		 821 newfileset.logicalBlockNum++;
822 brelse(bh);
823 bh = NULL;
824 break;
1da177e4 825 }
28de7948
CG		 826 } while (newfileset.logicalBlockNum < lastblock &&
827 fileset->logicalBlockNum == 0xFFFFFFFF &&
828 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 829 }
830 }
831
832 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 833 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 834 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 835 fileset->logicalBlockNum,
836 fileset->partitionReferenceNum);
1da177e4 837
6c79e987 838 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 839 udf_load_fileset(sb, bh, root);
3bf25cb4 840 brelse(bh);
1da177e4
LT		 841 return 0;
842 }
843 return 1;
844}
845
d759bfa4
JK		 846/*
847 * Load primary Volume Descriptor Sequence
848 *
849 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
850 * should be tried.
851 */
c0eb31ed 852static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 853{
854 struct primaryVolDesc *pvoldesc;
ba9aadd8 855 struct ustr *instr, *outstr;
c0eb31ed
JK		 856 struct buffer_head *bh;
857 uint16_t ident;
d759bfa4 858 int ret = -ENOMEM;
ba9aadd8
MS		 859
860 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
861 if (!instr)
d759bfa4 862 return -ENOMEM;
ba9aadd8
MS		 863
864 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
865 if (!outstr)
866 goto out1;
c0eb31ed
JK		 867
868 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 869 if (!bh) {
870 ret = -EAGAIN;
ba9aadd8 871 goto out2;
d759bfa4 872 }
ba9aadd8 873
d759bfa4
JK		 874 if (ident != TAG_IDENT_PVD) {
875 ret = -EIO;
876 goto out_bh;
877 }
1da177e4
LT		 878
879 pvoldesc = (struct primaryVolDesc *)bh->b_data;
880
56774805
MS		 881 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
882 pvoldesc->recordingDateAndTime)) {
af15a298 883#ifdef UDFFS_DEBUG
5ca4e4be 884 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 885 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 886 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
887 ts->minute, le16_to_cpu(ts->typeAndTimezone));
888#endif
1da177e4
LT		 889 }
890
ba9aadd8
MS		 891 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
892 if (udf_CS0toUTF8(outstr, instr)) {
893 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
894 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a 895 udf_debug("volIdent[] = '%s'\n",
a983f368 896 UDF_SB(sb)->s_volume_ident);
1da177e4 897 }
1da177e4 898
ba9aadd8
MS		 899 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
900 if (udf_CS0toUTF8(outstr, instr))
901 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed 902
ba9aadd8 903 ret = 0;
d759bfa4
JK		 904out_bh:
905 brelse(bh);
ba9aadd8
MS		 906out2:
907 kfree(outstr);
908out1:
909 kfree(instr);
910 return ret;
1da177e4
LT		 911}
912
3080a74e
NJ		 913struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
914 u32 meta_file_loc, u32 partition_num)
915{
916 struct kernel_lb_addr addr;
917 struct inode *metadata_fe;
918
919 addr.logicalBlockNum = meta_file_loc;
920 addr.partitionReferenceNum = partition_num;
921
922 metadata_fe = udf_iget(sb, &addr);
923
924 if (metadata_fe == NULL)
925 udf_warn(sb, "metadata inode efe not found\n");
926 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
927 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
928 iput(metadata_fe);
929 metadata_fe = NULL;
930 }
931
932 return metadata_fe;
933}
934
bfb257a5
JK		 935static int udf_load_metadata_files(struct super_block *sb, int partition)
936{
937 struct udf_sb_info *sbi = UDF_SB(sb);
938 struct udf_part_map *map;
939 struct udf_meta_data *mdata;
5ca4e4be 940 struct kernel_lb_addr addr;
bfb257a5
JK		 941
942 map = &sbi->s_partmaps[partition];
943 mdata = &map->s_type_specific.s_metadata;
944
945 /* metadata address */
bfb257a5 946 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 947 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 948
3080a74e
NJ		 949 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
950 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5
JK		 951
952 if (mdata->s_metadata_fe == NULL) {
3080a74e
NJ		 953 /* mirror file entry */
954 udf_debug("Mirror metadata file location: block = %d part = %d\n",
955 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 956
3080a74e
NJ		 957 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
958 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 959
3080a74e
NJ		 960 if (mdata->s_mirror_fe == NULL) {
961 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
d759bfa4 962 return -EIO;
3080a74e 963 }
bfb257a5
JK		 964 }
965
966 /*
967 * bitmap file entry
968 * Note:
969 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
970 */
971 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
972 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
973 addr.partitionReferenceNum = map->s_partition_num;
974
975 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 976 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 977
97e961fd 978 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 979 if (mdata->s_bitmap_fe == NULL) {
980 if (sb->s_flags & MS_RDONLY)
a40ecd7b 981 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 982 else {
8076c363 983 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
d759bfa4 984 return -EIO;
bfb257a5
JK		 985 }
986 }
987 }
988
989 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 990 return 0;
bfb257a5
JK		 991}
992
28de7948 993static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 994 struct kernel_lb_addr *root)
1da177e4
LT		 995{
996 struct fileSetDesc *fset;
997
998 fset = (struct fileSetDesc *)bh->b_data;
999
1000 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1001
6c79e987 1002 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1003
cb00ea35
CG		 1004 udf_debug("Rootdir at block=%d, partition=%d\n",
1005 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1006}
1007
883cb9d1
MS		 1008int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1009{
1010 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1011 return DIV_ROUND_UP(map->s_partition_len +
1012 (sizeof(struct spaceBitmapDesc) << 3),
1013 sb->s_blocksize * 8);
883cb9d1
MS		 1014}
1015
66e1da3f
MS		 1016static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1017{
66e1da3f
MS		 1018 struct udf_bitmap *bitmap;
1019 int nr_groups;
1020 int size;
1021
883cb9d1 1022 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1023 size = sizeof(struct udf_bitmap) +
1024 (sizeof(struct buffer_head *) * nr_groups);
1025
1026 if (size <= PAGE_SIZE)
ed2ae6f6 1027 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1028 else
ed2ae6f6 1029 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1030
75b09e02 1031 if (bitmap == NULL)
66e1da3f 1032 return NULL;
66e1da3f 1033
66e1da3f
MS		 1034 bitmap->s_nr_groups = nr_groups;
1035 return bitmap;
1036}
1037
3fb38dfa
JK		 1038static int udf_fill_partdesc_info(struct super_block *sb,
1039 struct partitionDesc *p, int p_index)
1da177e4 1040{
6c79e987 1041 struct udf_part_map *map;
165923fa 1042 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1043 struct partitionHeaderDesc *phd;
165923fa 1044
3fb38dfa 1045 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1046
1047 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1048 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1049
1050 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1051 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1052 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1053 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1054 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1055 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1056 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1057 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1058
a983f368
JP		 1059 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1060 p_index, map->s_partition_type,
1061 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1062
1063 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1064 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1065 return 0;
165923fa
MS		 1066
1067 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1068 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1069 struct kernel_lb_addr loc = {
165923fa
MS		 1070 .logicalBlockNum = le32_to_cpu(
1071 phd->unallocSpaceTable.extPosition),
3fb38dfa 1072 .partitionReferenceNum = p_index,
165923fa
MS		 1073 };
1074
97e961fd 1075 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1076 if (!map->s_uspace.s_table) {
1077 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1078 p_index);
d759bfa4 1079 return -EIO;
165923fa
MS		 1080 }
1081 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1082 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1083 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1084 }
1085
1086 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1087 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1088 if (!bitmap)
d759bfa4 1089 return -ENOMEM;
165923fa 1090 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1091 bitmap->s_extPosition = le32_to_cpu(
165923fa 1092 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1093 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1094 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1095 p_index, bitmap->s_extPosition);
165923fa
MS		 1096 }
1097
1098 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1099 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1100
1101 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1102 struct kernel_lb_addr loc = {
165923fa
MS		 1103 .logicalBlockNum = le32_to_cpu(
1104 phd->freedSpaceTable.extPosition),
3fb38dfa 1105 .partitionReferenceNum = p_index,
165923fa
MS		 1106 };
1107
97e961fd 1108 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1109 if (!map->s_fspace.s_table) {
3fb38dfa 1110 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1111 p_index);
d759bfa4 1112 return -EIO;
165923fa
MS		 1113 }
1114
1115 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1116 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1117 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1118 }
1119
1120 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1121 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1122 if (!bitmap)
d759bfa4 1123 return -ENOMEM;
165923fa 1124 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1125 bitmap->s_extPosition = le32_to_cpu(
165923fa 1126 phd->freedSpaceBitmap.extPosition);
2e0838fd 1127 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1128 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1129 p_index, bitmap->s_extPosition);
165923fa 1130 }
3fb38dfa
JK		 1131 return 0;
1132}
1133
e971b0b9
JK		 1134static void udf_find_vat_block(struct super_block *sb, int p_index,
1135 int type1_index, sector_t start_block)
38b74a53
JK		 1136{
1137 struct udf_sb_info *sbi = UDF_SB(sb);
1138 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1139 sector_t vat_block;
5ca4e4be 1140 struct kernel_lb_addr ino;
e971b0b9
JK		 1141
1142 /*
1143 * VAT file entry is in the last recorded block. Some broken disks have
1144 * it a few blocks before so try a bit harder...
1145 */
1146 ino.partitionReferenceNum = type1_index;
1147 for (vat_block = start_block;
1148 vat_block >= map->s_partition_root &&
1149 vat_block >= start_block - 3 &&
1150 !sbi->s_vat_inode; vat_block--) {
1151 ino.logicalBlockNum = vat_block - map->s_partition_root;
1152 sbi->s_vat_inode = udf_iget(sb, &ino);
1153 }
1154}
1155
1156static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1157{
1158 struct udf_sb_info *sbi = UDF_SB(sb);
1159 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1160 struct buffer_head *bh = NULL;
1161 struct udf_inode_info *vati;
1162 uint32_t pos;
1163 struct virtualAllocationTable20 *vat20;
4bf17af0 1164 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1165
e971b0b9 1166 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1167 if (!sbi->s_vat_inode &&
1168 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1169 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1170 (unsigned long)sbi->s_last_block,
1171 (unsigned long)blocks - 1);
e971b0b9 1172 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1173 }
38b74a53 1174 if (!sbi->s_vat_inode)
d759bfa4 1175 return -EIO;
38b74a53
JK		 1176
1177 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1178 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1179 map->s_type_specific.s_virtual.s_num_entries =
1180 (sbi->s_vat_inode->i_size - 36) >> 2;
1181 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1182 vati = UDF_I(sbi->s_vat_inode);
1183 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1184 pos = udf_block_map(sbi->s_vat_inode, 0);
1185 bh = sb_bread(sb, pos);
1186 if (!bh)
d759bfa4 1187 return -EIO;
fa5e0815
JK		 1188 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1189 } else {
1190 vat20 = (struct virtualAllocationTable20 *)
1191 vati->i_ext.i_data;
1192 }
38b74a53 1193
38b74a53 1194 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1195 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1196 map->s_type_specific.s_virtual.s_num_entries =
1197 (sbi->s_vat_inode->i_size -
1198 map->s_type_specific.s_virtual.
1199 s_start_offset) >> 2;
1200 brelse(bh);
1201 }
1202 return 0;
1203}
1204
d759bfa4
JK		 1205/*
1206 * Load partition descriptor block
1207 *
1208 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1209 * sequence.
1210 */
3fb38dfa
JK		 1211static int udf_load_partdesc(struct super_block *sb, sector_t block)
1212{
1213 struct buffer_head *bh;
1214 struct partitionDesc *p;
1215 struct udf_part_map *map;
1216 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1217 int i, type1_idx;
3fb38dfa
JK		 1218 uint16_t partitionNumber;
1219 uint16_t ident;
d759bfa4 1220 int ret;
3fb38dfa
JK		 1221
1222 bh = udf_read_tagged(sb, block, block, &ident);
1223 if (!bh)
d759bfa4
JK		 1224 return -EAGAIN;
1225 if (ident != TAG_IDENT_PD) {
1226 ret = 0;
3fb38dfa 1227 goto out_bh;
d759bfa4 1228 }
3fb38dfa
JK		 1229
1230 p = (struct partitionDesc *)bh->b_data;
1231 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1232
bfb257a5 1233 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1234 for (i = 0; i < sbi->s_partitions; i++) {
1235 map = &sbi->s_partmaps[i];
1236 udf_debug("Searching map: (%d == %d)\n",
1237 map->s_partition_num, partitionNumber);
38b74a53
JK		 1238 if (map->s_partition_num == partitionNumber &&
1239 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1240 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1241 break;
1242 }
1243
38b74a53 1244 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1245 udf_debug("Partition (%d) not found in partition map\n",
1246 partitionNumber);
d759bfa4 1247 ret = 0;
3fb38dfa
JK		 1248 goto out_bh;
1249 }
165923fa 1250
3fb38dfa 1251 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1252 if (ret < 0)
1253 goto out_bh;
38b74a53
JK		 1254
1255 /*
bfb257a5
JK		 1256 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1257 * PHYSICAL partitions are already set up
38b74a53
JK		 1258 */
1259 type1_idx = i;
1260 for (i = 0; i < sbi->s_partitions; i++) {
1261 map = &sbi->s_partmaps[i];
1262
1263 if (map->s_partition_num == partitionNumber &&
1264 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1265 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1266 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1267 break;
1268 }
1269
d759bfa4
JK		 1270 if (i >= sbi->s_partitions) {
1271 ret = 0;
38b74a53 1272 goto out_bh;
d759bfa4 1273 }
38b74a53
JK		 1274
1275 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1276 if (ret < 0)
38b74a53
JK		 1277 goto out_bh;
1278
bfb257a5
JK		 1279 if (map->s_partition_type == UDF_METADATA_MAP25) {
1280 ret = udf_load_metadata_files(sb, i);
d759bfa4 1281 if (ret < 0) {
78ace70c
JP		 1282 udf_err(sb, "error loading MetaData partition map %d\n",
1283 i);
bfb257a5
JK		 1284 goto out_bh;
1285 }
1286 } else {
1287 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1288 if (ret < 0)
bfb257a5
JK		 1289 goto out_bh;
1290 /*
1291 * Mark filesystem read-only if we have a partition with
1292 * virtual map since we don't handle writing to it (we
1293 * overwrite blocks instead of relocating them).
1294 */
1295 sb->s_flags |= MS_RDONLY;
78ace70c 1296 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
bfb257a5 1297 }
d759bfa4 1298 ret = 0;
c0eb31ed 1299out_bh:
2e0838fd 1300 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1301 brelse(bh);
1302 return ret;
1da177e4
LT		 1303}
1304
1df2ae31
JK		 1305static int udf_load_sparable_map(struct super_block *sb,
1306 struct udf_part_map *map,
1307 struct sparablePartitionMap *spm)
1308{
1309 uint32_t loc;
1310 uint16_t ident;
1311 struct sparingTable *st;
1312 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1313 int i;
1314 struct buffer_head *bh;
1315
1316 map->s_partition_type = UDF_SPARABLE_MAP15;
1317 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1318 if (!is_power_of_2(sdata->s_packet_len)) {
1319 udf_err(sb, "error loading logical volume descriptor: "
1320 "Invalid packet length %u\n",
1321 (unsigned)sdata->s_packet_len);
1322 return -EIO;
1323 }
1324 if (spm->numSparingTables > 4) {
1325 udf_err(sb, "error loading logical volume descriptor: "
1326 "Too many sparing tables (%d)\n",
1327 (int)spm->numSparingTables);
1328 return -EIO;
1329 }
1330
1331 for (i = 0; i < spm->numSparingTables; i++) {
1332 loc = le32_to_cpu(spm->locSparingTable[i]);
1333 bh = udf_read_tagged(sb, loc, loc, &ident);
1334 if (!bh)
1335 continue;
1336
1337 st = (struct sparingTable *)bh->b_data;
1338 if (ident != 0 ||
1339 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1340 strlen(UDF_ID_SPARING)) ||
1341 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1342 sb->s_blocksize) {
1343 brelse(bh);
1344 continue;
1345 }
1346
1347 sdata->s_spar_map[i] = bh;
1348 }
1349 map->s_partition_func = udf_get_pblock_spar15;
1350 return 0;
1351}
1352
c0eb31ed 1353static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1354 struct kernel_lb_addr *fileset)
1da177e4
LT		 1355{
1356 struct logicalVolDesc *lvd;
1df2ae31 1357 int i, offset;
1da177e4 1358 uint8_t type;
6c79e987 1359 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1360 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1361 uint16_t ident;
1362 struct buffer_head *bh;
adee11b2 1363 unsigned int table_len;
d759bfa4 1364 int ret;
1da177e4 1365
c0eb31ed
JK		 1366 bh = udf_read_tagged(sb, block, block, &ident);
1367 if (!bh)
d759bfa4 1368 return -EAGAIN;
c0eb31ed 1369 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1370 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1371 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1372 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1373 udf_err(sb, "error loading logical volume descriptor: "
1374 "Partition table too long (%u > %lu)\n", table_len,
1375 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1376 ret = -EIO;
adee11b2
JK		 1377 goto out_bh;
1378 }
1da177e4 1379
cb14d340
JK		 1380 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1381 if (ret)
c0eb31ed 1382 goto out_bh;
1da177e4 1383
cb00ea35 1384 for (i = 0, offset = 0;
adee11b2 1385 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1386 i++, offset += gpm->partitionMapLength) {
1387 struct udf_part_map *map = &sbi->s_partmaps[i];
1388 gpm = (struct genericPartitionMap *)
1389 &(lvd->partitionMaps[offset]);
1390 type = gpm->partitionMapType;
cb00ea35 1391 if (type == 1) {
4b11111a
MS		 1392 struct genericPartitionMap1 *gpm1 =
1393 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1394 map->s_partition_type = UDF_TYPE1_MAP15;
1395 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1396 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1397 map->s_partition_func = NULL;
cb00ea35 1398 } else if (type == 2) {
4b11111a
MS		 1399 struct udfPartitionMap2 *upm2 =
1400 (struct udfPartitionMap2 *)gpm;
1401 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1402 strlen(UDF_ID_VIRTUAL))) {
1403 u16 suf =
1404 le16_to_cpu(((__le16 *)upm2->partIdent.
1405 identSuffix)[0]);
c82a1275 1406 if (suf < 0x0200) {
4b11111a
MS		 1407 map->s_partition_type =
1408 UDF_VIRTUAL_MAP15;
1409 map->s_partition_func =
1410 udf_get_pblock_virt15;
c82a1275 1411 } else {
4b11111a
MS		 1412 map->s_partition_type =
1413 UDF_VIRTUAL_MAP20;
1414 map->s_partition_func =
1415 udf_get_pblock_virt20;
1da177e4 1416 }
4b11111a
MS		 1417 } else if (!strncmp(upm2->partIdent.ident,
1418 UDF_ID_SPARABLE,
1419 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1420 ret = udf_load_sparable_map(sb, map,
1421 (struct sparablePartitionMap *)gpm);
1422 if (ret < 0)
1df2ae31 1423 goto out_bh;
bfb257a5
JK		 1424 } else if (!strncmp(upm2->partIdent.ident,
1425 UDF_ID_METADATA,
1426 strlen(UDF_ID_METADATA))) {
1427 struct udf_meta_data *mdata =
1428 &map->s_type_specific.s_metadata;
1429 struct metadataPartitionMap *mdm =
1430 (struct metadataPartitionMap *)
1431 &(lvd->partitionMaps[offset]);
a983f368
JP		 1432 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1433 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1434
1435 map->s_partition_type = UDF_METADATA_MAP25;
1436 map->s_partition_func = udf_get_pblock_meta25;
1437
1438 mdata->s_meta_file_loc =
1439 le32_to_cpu(mdm->metadataFileLoc);
1440 mdata->s_mirror_file_loc =
1441 le32_to_cpu(mdm->metadataMirrorFileLoc);
1442 mdata->s_bitmap_file_loc =
1443 le32_to_cpu(mdm->metadataBitmapFileLoc);
1444 mdata->s_alloc_unit_size =
1445 le32_to_cpu(mdm->allocUnitSize);
1446 mdata->s_align_unit_size =
1447 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1448 if (mdm->flags & 0x01)
1449 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1450
1451 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1452 le16_to_cpu(*(__le16 *)
1453 mdm->partIdent.identSuffix));
bfb257a5 1454 udf_debug("Metadata part num=%d\n",
a983f368 1455 le16_to_cpu(mdm->partitionNum));
bfb257a5 1456 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1457 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1458 udf_debug("Metadata file loc=%d\n",
a983f368 1459 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1460 udf_debug("Mirror file loc=%d\n",
a983f368 1461 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1462 udf_debug("Bitmap file loc=%d\n",
a983f368 1463 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1464 udf_debug("Flags: %d %d\n",
1465 mdata->s_flags, mdm->flags);
cb00ea35 1466 } else {
3a71fc5d
MS		 1467 udf_debug("Unknown ident: %s\n",
1468 upm2->partIdent.ident);
1da177e4
LT		 1469 continue;
1470 }
6c79e987
MS		 1471 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1472 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1473 }
1474 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1475 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1476 }
1477
cb00ea35 1478 if (fileset) {
5ca4e4be 1479 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1480
1481 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1482 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1483 fileset->logicalBlockNum,
28de7948 1484 fileset->partitionReferenceNum);
1da177e4
LT		 1485 }
1486 if (lvd->integritySeqExt.extLength)
1487 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1488 ret = 0;
c0eb31ed
JK		 1489out_bh:
1490 brelse(bh);
1491 return ret;
1da177e4
LT		 1492}
1493
1494/*
1495 * udf_load_logicalvolint
1496 *
1497 */
5ca4e4be 1498static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1499{
1500 struct buffer_head *bh = NULL;
1501 uint16_t ident;
6c79e987
MS		 1502 struct udf_sb_info *sbi = UDF_SB(sb);
1503 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1504
1505 while (loc.extLength > 0 &&
cb00ea35
CG		 1506 (bh = udf_read_tagged(sb, loc.extLocation,
1507 loc.extLocation, &ident)) &&
1508 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1509 sbi->s_lvid_bh = bh;
1510 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1511
6c79e987 1512 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1513 udf_load_logicalvolint(sb,
6c79e987 1514 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1515
6c79e987 1516 if (sbi->s_lvid_bh != bh)
3bf25cb4 1517 brelse(bh);
1da177e4 1518 loc.extLength -= sb->s_blocksize;
cb00ea35 1519 loc.extLocation++;
1da177e4 1520 }
6c79e987 1521 if (sbi->s_lvid_bh != bh)
3bf25cb4 1522 brelse(bh);
1da177e4
LT		 1523}
1524
1525/*
d759bfa4
JK		 1526 * Process a main/reserve volume descriptor sequence.
1527 * @block First block of first extent of the sequence.
1528 * @lastblock Lastblock of first extent of the sequence.
1529 * @fileset There we store extent containing root fileset
1da177e4 1530 *
d759bfa4
JK		 1531 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1532 * sequence
1da177e4 1533 */
d759bfa4
JK		 1534static noinline int udf_process_sequence(
1535 struct super_block *sb,
1536 sector_t block, sector_t lastblock,
1537 struct kernel_lb_addr *fileset)
1da177e4
LT		 1538{
1539 struct buffer_head *bh = NULL;
1540 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1541 struct udf_vds_record *curr;
1da177e4
LT		 1542 struct generic_desc *gd;
1543 struct volDescPtr *vdp;
cb00ea35 1544 int done = 0;
1da177e4
LT		 1545 uint32_t vdsn;
1546 uint16_t ident;
1547 long next_s = 0, next_e = 0;
d759bfa4 1548 int ret;
1da177e4
LT		 1549
1550 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1551
c0eb31ed
JK		 1552 /*
1553 * Read the main descriptor sequence and find which descriptors
1554 * are in it.
1555 */
cb00ea35 1556 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1557
1558 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1559 if (!bh) {
78ace70c
JP		 1560 udf_err(sb,
1561 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1562 (unsigned long long)block);
d759bfa4 1563 return -EAGAIN;
c0eb31ed 1564 }
1da177e4
LT		 1565
1566 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1567 gd = (struct generic_desc *)bh->b_data;
1568 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1569 switch (ident) {
28de7948 1570 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1571 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1572 if (vdsn >= curr->volDescSeqNum) {
1573 curr->volDescSeqNum = vdsn;
1574 curr->block = block;
cb00ea35
CG		 1575 }
1576 break;
28de7948 1577 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1578 curr = &vds[VDS_POS_VOL_DESC_PTR];
1579 if (vdsn >= curr->volDescSeqNum) {
1580 curr->volDescSeqNum = vdsn;
1581 curr->block = block;
cb00ea35
CG		 1582
1583 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1584 next_s = le32_to_cpu(
1585 vdp->nextVolDescSeqExt.extLocation);
1586 next_e = le32_to_cpu(
1587 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1588 next_e = next_e >> sb->s_blocksize_bits;
1589 next_e += next_s;
1590 }
1591 break;
28de7948 1592 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1593 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1594 if (vdsn >= curr->volDescSeqNum) {
1595 curr->volDescSeqNum = vdsn;
1596 curr->block = block;
cb00ea35
CG		 1597 }
1598 break;
28de7948 1599 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1600 curr = &vds[VDS_POS_PARTITION_DESC];
1601 if (!curr->block)
1602 curr->block = block;
cb00ea35 1603 break;
28de7948 1604 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1605 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1606 if (vdsn >= curr->volDescSeqNum) {
1607 curr->volDescSeqNum = vdsn;
1608 curr->block = block;
cb00ea35
CG		 1609 }
1610 break;
28de7948 1611 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1612 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1613 if (vdsn >= curr->volDescSeqNum) {
1614 curr->volDescSeqNum = vdsn;
1615 curr->block = block;
cb00ea35
CG		 1616 }
1617 break;
28de7948 1618 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1619 vds[VDS_POS_TERMINATING_DESC].block = block;
1620 if (next_e) {
1621 block = next_s;
1622 lastblock = next_e;
1623 next_s = next_e = 0;
4b11111a 1624 } else
cb00ea35
CG		 1625 done = 1;
1626 break;
1da177e4 1627 }
3bf25cb4 1628 brelse(bh);
1da177e4 1629 }
c0eb31ed
JK		 1630 /*
1631 * Now read interesting descriptors again and process them
1632 * in a suitable order
1633 */
1634 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1635 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1636 return -EAGAIN;
1637 }
1638 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1639 if (ret < 0)
1640 return ret;
1641
1642 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1643 ret = udf_load_logicalvol(sb,
1644 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1645 fileset);
1646 if (ret < 0)
1647 return ret;
c0eb31ed 1648 }
165923fa 1649
c0eb31ed
JK		 1650 if (vds[VDS_POS_PARTITION_DESC].block) {
1651 /*
1652 * We rescan the whole descriptor sequence to find
1653 * partition descriptor blocks and process them.
1654 */
1655 for (block = vds[VDS_POS_PARTITION_DESC].block;
1656 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1657 block++) {
1658 ret = udf_load_partdesc(sb, block);
1659 if (ret < 0)
1660 return ret;
1661 }
1da177e4
LT		 1662 }
1663
1664 return 0;
1665}
1666
d759bfa4
JK		 1667/*
1668 * Load Volume Descriptor Sequence described by anchor in bh
1669 *
1670 * Returns <0 on error, 0 on success
1671 */
40346005
JK		 1672static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1673 struct kernel_lb_addr *fileset)
1da177e4 1674{
40346005 1675 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1676 sector_t main_s, main_e, reserve_s, reserve_e;
1677 int ret;
1da177e4 1678
40346005
JK		 1679 anchor = (struct anchorVolDescPtr *)bh->b_data;
1680
1681 /* Locate the main sequence */
1682 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1683 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1684 main_e = main_e >> sb->s_blocksize_bits;
1685 main_e += main_s;
1686
1687 /* Locate the reserve sequence */
1688 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1689 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1690 reserve_e = reserve_e >> sb->s_blocksize_bits;
1691 reserve_e += reserve_s;
1692
1693 /* Process the main & reserve sequences */
1694 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1695 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1696 if (ret != -EAGAIN)
1697 return ret;
bff943af 1698 udf_sb_free_partitions(sb);
d759bfa4
JK		 1699 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1700 if (ret < 0) {
1701 udf_sb_free_partitions(sb);
1702 /* No sequence was OK, return -EIO */
1703 if (ret == -EAGAIN)
1704 ret = -EIO;
1705 }
1706 return ret;
1da177e4
LT		 1707}
1708
40346005
JK		 1709/*
1710 * Check whether there is an anchor block in the given block and
1711 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1712 *
1713 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1714 * block
40346005
JK		 1715 */
1716static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1717 struct kernel_lb_addr *fileset)
1197e4df 1718{
40346005
JK		 1719 struct buffer_head *bh;
1720 uint16_t ident;
1721 int ret;
1197e4df 1722
40346005
JK		 1723 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1724 udf_fixed_to_variable(block) >=
1725 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1726 return -EAGAIN;
40346005
JK		 1727
1728 bh = udf_read_tagged(sb, block, block, &ident);
1729 if (!bh)
d759bfa4 1730 return -EAGAIN;
40346005
JK		 1731 if (ident != TAG_IDENT_AVDP) {
1732 brelse(bh);
d759bfa4 1733 return -EAGAIN;
1197e4df 1734 }
40346005
JK		 1735 ret = udf_load_sequence(sb, bh, fileset);
1736 brelse(bh);
1737 return ret;
1197e4df
CL		 1738}
1739
d759bfa4
JK		 1740/*
1741 * Search for an anchor volume descriptor pointer.
1742 *
1743 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1744 * of anchors.
1745 */
1746static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1747 struct kernel_lb_addr *fileset)
1da177e4 1748{
40346005 1749 sector_t last[6];
38b74a53 1750 int i;
40346005
JK		 1751 struct udf_sb_info *sbi = UDF_SB(sb);
1752 int last_count = 0;
d759bfa4 1753 int ret;
1da177e4 1754
40346005
JK		 1755 /* First try user provided anchor */
1756 if (sbi->s_anchor) {
d759bfa4
JK		 1757 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1758 if (ret != -EAGAIN)
1759 return ret;
40346005
JK		 1760 }
1761 /*
1762 * according to spec, anchor is in either:
1763 * block 256
1764 * lastblock-256
1765 * lastblock
1766 * however, if the disc isn't closed, it could be 512.
1767 */
d759bfa4
JK		 1768 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1769 if (ret != -EAGAIN)
1770 return ret;
40346005
JK		 1771 /*
1772 * The trouble is which block is the last one. Drives often misreport
1773 * this so we try various possibilities.
1774 */
d759bfa4
JK		 1775 last[last_count++] = *lastblock;
1776 if (*lastblock >= 1)
1777 last[last_count++] = *lastblock - 1;
1778 last[last_count++] = *lastblock + 1;
1779 if (*lastblock >= 2)
1780 last[last_count++] = *lastblock - 2;
1781 if (*lastblock >= 150)
1782 last[last_count++] = *lastblock - 150;
1783 if (*lastblock >= 152)
1784 last[last_count++] = *lastblock - 152;
1da177e4 1785
40346005
JK		 1786 for (i = 0; i < last_count; i++) {
1787 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1788 sb->s_blocksize_bits)
28f7c4d4 1789 continue;
d759bfa4
JK		 1790 ret = udf_check_anchor_block(sb, last[i], fileset);
1791 if (ret != -EAGAIN) {
1792 if (!ret)
1793 *lastblock = last[i];
1794 return ret;
1795 }
40346005 1796 if (last[i] < 256)
28f7c4d4 1797 continue;
d759bfa4
JK		 1798 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1799 if (ret != -EAGAIN) {
1800 if (!ret)
1801 *lastblock = last[i];
1802 return ret;
1803 }
40346005 1804 }
28f7c4d4 1805
40346005 1806 /* Finally try block 512 in case media is open */
d759bfa4 1807 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1808}
28f7c4d4 1809
40346005
JK		 1810/*
1811 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1812 * area specified by it. The function expects sbi->s_lastblock to be the last
1813 * block on the media.
1814 *
d759bfa4
JK		 1815 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1816 * was not found.
40346005
JK		 1817 */
1818static int udf_find_anchor(struct super_block *sb,
1819 struct kernel_lb_addr *fileset)
1820{
40346005 1821 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1822 sector_t lastblock = sbi->s_last_block;
1823 int ret;
28f7c4d4 1824
d759bfa4
JK		 1825 ret = udf_scan_anchors(sb, &lastblock, fileset);
1826 if (ret != -EAGAIN)
40346005 1827 goto out;
1da177e4 1828
40346005
JK		 1829 /* No anchor found? Try VARCONV conversion of block numbers */
1830 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1831 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1832 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1833 ret = udf_scan_anchors(sb, &lastblock, fileset);
1834 if (ret != -EAGAIN)
40346005 1835 goto out;
1da177e4 1836
d759bfa4 1837 lastblock = sbi->s_last_block;
40346005 1838 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1839 ret = udf_scan_anchors(sb, &lastblock, fileset);
1840 if (ret < 0) {
40346005
JK		 1841 /* VARCONV didn't help. Clear it. */
1842 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1843 }
40346005 1844out:
d759bfa4
JK		 1845 if (ret == 0)
1846 sbi->s_last_block = lastblock;
1847 return ret;
40346005 1848}
1da177e4 1849
40346005
JK		 1850/*
1851 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1852 * Descriptor Sequence.
1853 *
1854 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1855 * block was not found.
40346005
JK		 1856 */
1857static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1858 int silent, struct kernel_lb_addr *fileset)
1859{
1860 struct udf_sb_info *sbi = UDF_SB(sb);
1861 loff_t nsr_off;
d759bfa4 1862 int ret;
40346005
JK		 1863
1864 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1865 if (!silent)
78ace70c 1866 udf_warn(sb, "Bad block size\n");
d759bfa4 1867 return -EINVAL;
40346005
JK		 1868 }
1869 sbi->s_last_block = uopt->lastblock;
1870 if (!uopt->novrs) {
1871 /* Check that it is NSR02 compliant */
1872 nsr_off = udf_check_vsd(sb);
1873 if (!nsr_off) {
1874 if (!silent)
78ace70c 1875 udf_warn(sb, "No VRS found\n");
40346005
JK		 1876 return 0;
1877 }
1878 if (nsr_off == -1)
a983f368 1879 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
40346005
JK		 1880 if (!sbi->s_last_block)
1881 sbi->s_last_block = udf_get_last_block(sb);
1882 } else {
1883 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1884 }
1da177e4 1885
40346005
JK		 1886 /* Look for anchor block and load Volume Descriptor Sequence */
1887 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1888 ret = udf_find_anchor(sb, fileset);
1889 if (ret < 0) {
1890 if (!silent && ret == -EAGAIN)
78ace70c 1891 udf_warn(sb, "No anchor found\n");
d759bfa4 1892 return ret;
40346005 1893 }
d759bfa4 1894 return 0;
1da177e4
LT		 1895}
1896
1897static void udf_open_lvid(struct super_block *sb)
1898{
6c79e987
MS		 1899 struct udf_sb_info *sbi = UDF_SB(sb);
1900 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1901 struct logicalVolIntegrityDesc *lvid;
1902 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1903
165923fa
MS		 1904 if (!bh)
1905 return;
949f4a7c
JK		 1906
1907 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1908 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1909 lvidiu = udf_sb_lvidiu(sbi);
1910
1911 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1912 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1913 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1914 CURRENT_TIME);
146bca72 1915 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1916
1917 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1918 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1919 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1920
1921 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1922 mark_buffer_dirty(bh);
146bca72 1923 sbi->s_lvid_dirty = 0;
949f4a7c 1924 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1925 /* Make opening of filesystem visible on the media immediately */
1926 sync_dirty_buffer(bh);
1da177e4
LT		 1927}
1928
1929static void udf_close_lvid(struct super_block *sb)
1930{
6c79e987
MS		 1931 struct udf_sb_info *sbi = UDF_SB(sb);
1932 struct buffer_head *bh = sbi->s_lvid_bh;
1933 struct logicalVolIntegrityDesc *lvid;
165923fa 1934 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1935
6c79e987
MS		 1936 if (!bh)
1937 return;
1938
949f4a7c 1939 mutex_lock(&sbi->s_alloc_mutex);
6c79e987 1940 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
165923fa
MS		 1941 lvidiu = udf_sb_lvidiu(sbi);
1942 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1943 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1944 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1945 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1946 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1947 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1948 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1949 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1950 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1951 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1952
1953 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1954 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1955 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1956
1957 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 1958 /*
1959 * We set buffer uptodate unconditionally here to avoid spurious
1960 * warnings from mark_buffer_dirty() when previous EIO has marked
1961 * the buffer as !uptodate
1962 */
1963 set_buffer_uptodate(bh);
165923fa 1964 mark_buffer_dirty(bh);
146bca72 1965 sbi->s_lvid_dirty = 0;
949f4a7c 1966 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1967 /* Make closing of filesystem visible on the media immediately */
1968 sync_dirty_buffer(bh);
1da177e4
LT		 1969}
1970
d664b6af
JK		 1971u64 lvid_get_unique_id(struct super_block *sb)
1972{
1973 struct buffer_head *bh;
1974 struct udf_sb_info *sbi = UDF_SB(sb);
1975 struct logicalVolIntegrityDesc *lvid;
1976 struct logicalVolHeaderDesc *lvhd;
1977 u64 uniqueID;
1978 u64 ret;
1979
1980 bh = sbi->s_lvid_bh;
1981 if (!bh)
1982 return 0;
1983
1984 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1985 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1986
1987 mutex_lock(&sbi->s_alloc_mutex);
1988 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1989 if (!(++uniqueID & 0xFFFFFFFF))
1990 uniqueID += 16;
1991 lvhd->uniqueID = cpu_to_le64(uniqueID);
1992 mutex_unlock(&sbi->s_alloc_mutex);
1993 mark_buffer_dirty(bh);
1994
1995 return ret;
1da177e4
LT		 1996}
1997
1da177e4
LT		 1998static int udf_fill_super(struct super_block *sb, void *options, int silent)
1999{
d759bfa4 2000 int ret = -EINVAL;
cb00ea35 2001 struct inode *inode = NULL;
1da177e4 2002 struct udf_options uopt;
5ca4e4be 2003 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 2004 struct udf_sb_info *sbi;
2005
2006 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2007 uopt.uid = INVALID_UID;
2008 uopt.gid = INVALID_GID;
1da177e4 2009 uopt.umask = 0;
87bc730c
MS		 2010 uopt.fmode = UDF_INVALID_MODE;
2011 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2012
6c79e987 2013 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2014 if (!sbi)
1da177e4 2015 return -ENOMEM;
28de7948 2016
1da177e4 2017 sb->s_fs_info = sbi;
1da177e4 2018
1e7933de 2019 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2020
6da80894 2021 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 2022 goto error_out;
2023
2024 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2025 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2026 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 2027 goto error_out;
2028 }
2029#ifdef CONFIG_UDF_NLS
cb00ea35 2030 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2031 uopt.nls_map = load_nls_default();
2032 if (!uopt.nls_map)
2033 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2034 else
2035 udf_debug("Using default NLS map\n");
2036 }
2037#endif
2038 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2039 uopt.flags |= (1 << UDF_FLAG_UTF8);
2040
2041 fileset.logicalBlockNum = 0xFFFFFFFF;
2042 fileset.partitionReferenceNum = 0xFFFF;
2043
6c79e987
MS		 2044 sbi->s_flags = uopt.flags;
2045 sbi->s_uid = uopt.uid;
2046 sbi->s_gid = uopt.gid;
2047 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2048 sbi->s_fmode = uopt.fmode;
2049 sbi->s_dmode = uopt.dmode;
6c79e987 2050 sbi->s_nls_map = uopt.nls_map;
c03cad24 2051 rwlock_init(&sbi->s_cred_lock);
1da177e4 2052
cb00ea35 2053 if (uopt.session == 0xFFFFFFFF)
6c79e987 2054 sbi->s_session = udf_get_last_session(sb);
1da177e4 2055 else
6c79e987 2056 sbi->s_session = uopt.session;
1da177e4 2057
6c79e987 2058 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2059
40346005
JK		 2060 /* Fill in the rest of the superblock */
2061 sb->s_op = &udf_sb_ops;
2062 sb->s_export_op = &udf_export_ops;
123e9caf 2063
40346005
JK		 2064 sb->s_magic = UDF_SUPER_MAGIC;
2065 sb->s_time_gran = 1000;
2066
1197e4df 2067 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2068 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2069 } else {
e1defc4f 2070 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2071 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2072 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2073 if (!silent)
78ace70c
JP		 2074 pr_notice("Rescanning with blocksize %d\n",
2075 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2076 brelse(sbi->s_lvid_bh);
2077 sbi->s_lvid_bh = NULL;
1197e4df 2078 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2079 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2080 }
1da177e4 2081 }
d759bfa4
JK		 2082 if (ret < 0) {
2083 if (ret == -EAGAIN) {
2084 udf_warn(sb, "No partition found (1)\n");
2085 ret = -EINVAL;
2086 }
1da177e4
LT		 2087 goto error_out;
2088 }
2089
6c79e987 2090 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2091
6c79e987 2092 if (sbi->s_lvid_bh) {
4b11111a
MS		 2093 struct logicalVolIntegrityDescImpUse *lvidiu =
2094 udf_sb_lvidiu(sbi);
6c79e987
MS		 2095 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2096 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
4b11111a
MS		 2097 /* uint16_t maxUDFWriteRev =
2098 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1da177e4 2099
cb00ea35 2100 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c
JP		 2101 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2102 le16_to_cpu(lvidiu->minUDFReadRev),
2103 UDF_MAX_READ_VERSION);
d759bfa4 2104 ret = -EINVAL;
1da177e4 2105 goto error_out;
4b11111a 2106 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1da177e4 2107 sb->s_flags |= MS_RDONLY;
1da177e4 2108
6c79e987 2109 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2110
2111 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2112 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2113 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2114 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2115 }
2116
6c79e987 2117 if (!sbi->s_partitions) {
78ace70c 2118 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2119 ret = -EINVAL;
1da177e4
LT		 2120 goto error_out;
2121 }
2122
4b11111a
MS		 2123 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2124 UDF_PART_FLAG_READ_ONLY) {
78ace70c 2125 pr_notice("Partition marked readonly; forcing readonly mount\n");
39b3f6d6 2126 sb->s_flags |= MS_RDONLY;
c1a26e7d 2127 }
39b3f6d6 2128
cb00ea35 2129 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2130 udf_warn(sb, "No fileset found\n");
d759bfa4 2131 ret = -EINVAL;
1da177e4
LT		 2132 goto error_out;
2133 }
2134
cb00ea35 2135 if (!silent) {
5ca4e4be 2136 struct timestamp ts;
56774805 2137 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2138 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2139 sbi->s_volume_ident,
2140 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2141 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2142 }
2143 if (!(sb->s_flags & MS_RDONLY))
2144 udf_open_lvid(sb);
2145
2146 /* Assign the root inode */
2147 /* assign inodes by physical block number */
2148 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2149 inode = udf_iget(sb, &rootdir);
cb00ea35 2150 if (!inode) {
78ace70c 2151 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2152 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
d759bfa4 2153 ret = -EIO;
1da177e4
LT		 2154 goto error_out;
2155 }
2156
2157 /* Allocate a dentry for the root inode */
48fde701 2158 sb->s_root = d_make_root(inode);
cb00ea35 2159 if (!sb->s_root) {
78ace70c 2160 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2161 ret = -ENOMEM;
1da177e4
LT		 2162 goto error_out;
2163 }
31170b6a 2164 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2165 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2166 return 0;
2167
28de7948 2168error_out:
6c79e987
MS		 2169 if (sbi->s_vat_inode)
2170 iput(sbi->s_vat_inode);
1da177e4
LT		 2171#ifdef CONFIG_UDF_NLS
2172 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2173 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2174#endif
2175 if (!(sb->s_flags & MS_RDONLY))
2176 udf_close_lvid(sb);
6c79e987 2177 brelse(sbi->s_lvid_bh);
bff943af 2178 udf_sb_free_partitions(sb);
1da177e4
LT		 2179 kfree(sbi);
2180 sb->s_fs_info = NULL;
28de7948 2181
d759bfa4 2182 return ret;
1da177e4
LT		 2183}
2184
8076c363
JP		 2185void _udf_err(struct super_block *sb, const char *function,
2186 const char *fmt, ...)
1da177e4 2187{
c2bff36c 2188 struct va_format vaf;
1da177e4
LT		 2189 va_list args;
2190
1da177e4 2191 va_start(args, fmt);
c2bff36c
JP		 2192
2193 vaf.fmt = fmt;
2194 vaf.va = &args;
2195
2196 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2197
1da177e4 2198 va_end(args);
1da177e4
LT		 2199}
2200
a40ecd7b
JP		 2201void _udf_warn(struct super_block *sb, const char *function,
2202 const char *fmt, ...)
1da177e4 2203{
c2bff36c 2204 struct va_format vaf;
1da177e4
LT		 2205 va_list args;
2206
cb00ea35 2207 va_start(args, fmt);
c2bff36c
JP		 2208
2209 vaf.fmt = fmt;
2210 vaf.va = &args;
2211
2212 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2213
1da177e4 2214 va_end(args);
1da177e4
LT		 2215}
2216
cb00ea35 2217static void udf_put_super(struct super_block *sb)
1da177e4 2218{
6c79e987 2219 struct udf_sb_info *sbi;
1da177e4 2220
6c79e987 2221 sbi = UDF_SB(sb);
6cfd0148 2222
6c79e987
MS		 2223 if (sbi->s_vat_inode)
2224 iput(sbi->s_vat_inode);
1da177e4
LT		 2225#ifdef CONFIG_UDF_NLS
2226 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2227 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2228#endif
2229 if (!(sb->s_flags & MS_RDONLY))
2230 udf_close_lvid(sb);
6c79e987 2231 brelse(sbi->s_lvid_bh);
bff943af 2232 udf_sb_free_partitions(sb);
1da177e4
LT		 2233 kfree(sb->s_fs_info);
2234 sb->s_fs_info = NULL;
2235}
2236
146bca72
JK		 2237static int udf_sync_fs(struct super_block *sb, int wait)
2238{
2239 struct udf_sb_info *sbi = UDF_SB(sb);
2240
2241 mutex_lock(&sbi->s_alloc_mutex);
2242 if (sbi->s_lvid_dirty) {
2243 /*
2244 * Blockdevice will be synced later so we don't have to submit
2245 * the buffer for IO
2246 */
2247 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2248 sbi->s_lvid_dirty = 0;
2249 }
2250 mutex_unlock(&sbi->s_alloc_mutex);
2251
2252 return 0;
2253}
2254
cb00ea35 2255static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2256{
726c3342 2257 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2258 struct udf_sb_info *sbi = UDF_SB(sb);
2259 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2260 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987
MS		 2261
2262 if (sbi->s_lvid_bh != NULL)
2263 lvidiu = udf_sb_lvidiu(sbi);
2264 else
2265 lvidiu = NULL;
726c3342 2266
1da177e4
LT		 2267 buf->f_type = UDF_SUPER_MAGIC;
2268 buf->f_bsize = sb->s_blocksize;
6c79e987 2269 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2270 buf->f_bfree = udf_count_free(sb);
2271 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2272 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2273 le32_to_cpu(lvidiu->numDirs)) : 0)
2274 + buf->f_bfree;
1da177e4 2275 buf->f_ffree = buf->f_bfree;
cb00ea35 2276 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2277 buf->f_fsid.val[0] = (u32)id;
2278 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2279
2280 return 0;
2281}
2282
4b11111a
MS		 2283static unsigned int udf_count_free_bitmap(struct super_block *sb,
2284 struct udf_bitmap *bitmap)
1da177e4
LT		 2285{
2286 struct buffer_head *bh = NULL;
2287 unsigned int accum = 0;
2288 int index;
2289 int block = 0, newblock;
5ca4e4be 2290 struct kernel_lb_addr loc;
1da177e4 2291 uint32_t bytes;
1da177e4
LT		 2292 uint8_t *ptr;
2293 uint16_t ident;
2294 struct spaceBitmapDesc *bm;
2295
1da177e4 2296 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2297 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2298 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2299
cb00ea35 2300 if (!bh) {
78ace70c 2301 udf_err(sb, "udf_count_free failed\n");
1da177e4 2302 goto out;
cb00ea35 2303 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2304 brelse(bh);
78ace70c 2305 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2306 goto out;
2307 }
2308
2309 bm = (struct spaceBitmapDesc *)bh->b_data;
2310 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2311 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2312 ptr = (uint8_t *)bh->b_data;
1da177e4 2313
cb00ea35 2314 while (bytes > 0) {
01b954a3
MS		 2315 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2316 accum += bitmap_weight((const unsigned long *)(ptr + index),
2317 cur_bytes * 8);
2318 bytes -= cur_bytes;
cb00ea35 2319 if (bytes) {
3bf25cb4 2320 brelse(bh);
97e961fd 2321 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2322 bh = udf_tread(sb, newblock);
cb00ea35 2323 if (!bh) {
1da177e4
LT		 2324 udf_debug("read failed\n");
2325 goto out;
2326 }
2327 index = 0;
28de7948 2328 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2329 }
2330 }
3bf25cb4 2331 brelse(bh);
28de7948 2332out:
1da177e4
LT		 2333 return accum;
2334}
2335
4b11111a
MS		 2336static unsigned int udf_count_free_table(struct super_block *sb,
2337 struct inode *table)
1da177e4
LT		 2338{
2339 unsigned int accum = 0;
ff116fc8 2340 uint32_t elen;
5ca4e4be 2341 struct kernel_lb_addr eloc;
1da177e4 2342 int8_t etype;
ff116fc8 2343 struct extent_position epos;
1da177e4 2344
d1668fe3 2345 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2346 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2347 epos.offset = sizeof(struct unallocSpaceEntry);
2348 epos.bh = NULL;
1da177e4 2349
3a71fc5d 2350 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2351 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2352
3bf25cb4 2353 brelse(epos.bh);
d1668fe3 2354 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2355
2356 return accum;
2357}
cb00ea35
CG		 2358
2359static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2360{
2361 unsigned int accum = 0;
6c79e987
MS		 2362 struct udf_sb_info *sbi;
2363 struct udf_part_map *map;
1da177e4 2364
6c79e987
MS		 2365 sbi = UDF_SB(sb);
2366 if (sbi->s_lvid_bh) {
4b11111a
MS		 2367 struct logicalVolIntegrityDesc *lvid =
2368 (struct logicalVolIntegrityDesc *)
2369 sbi->s_lvid_bh->b_data;
6c79e987 2370 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2371 accum = le32_to_cpu(
2372 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2373 if (accum == 0xFFFFFFFF)
2374 accum = 0;
2375 }
2376 }
2377
2378 if (accum)
2379 return accum;
2380
6c79e987
MS		 2381 map = &sbi->s_partmaps[sbi->s_partition];
2382 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2383 accum += udf_count_free_bitmap(sb,
6c79e987 2384 map->s_uspace.s_bitmap);
1da177e4 2385 }
6c79e987 2386 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2387 accum += udf_count_free_bitmap(sb,
6c79e987 2388 map->s_fspace.s_bitmap);
1da177e4
LT		 2389 }
2390 if (accum)
2391 return accum;
2392
6c79e987 2393 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2394 accum += udf_count_free_table(sb,
6c79e987 2395 map->s_uspace.s_table);
1da177e4 2396 }
6c79e987 2397 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2398 accum += udf_count_free_table(sb,
6c79e987 2399 map->s_fspace.s_table);
1da177e4
LT		 2400 }
2401
2402 return accum;
2403}
Linux 6.x block layer and io_uring tree(s)