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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>
51#include <linux/smp_lock.h>
52#include <linux/buffer_head.h>
53#include <linux/vfs.h>
54#include <linux/vmalloc.h>
dc5d39be 55#include <linux/errno.h>
6da80894
MS		 56#include <linux/mount.h>
57#include <linux/seq_file.h>
01b954a3 58#include <linux/bitmap.h>
f845fced 59#include <linux/crc-itu-t.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
1da177e4
LT		 79static char error_buf[1024];
80
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 *);
6da80894 95static int udf_show_options(struct seq_file *, struct vfsmount *);
b8145a76
AB		 96static void udf_error(struct super_block *sb, const char *function,
97 const char *fmt, ...);
1da177e4 98
6c79e987
MS		 99struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
100{
4b11111a
MS		 101 struct logicalVolIntegrityDesc *lvid =
102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
6c79e987 103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
4b11111a
MS		 104 __u32 offset = number_of_partitions * 2 *
105 sizeof(uint32_t)/sizeof(uint8_t);
6c79e987
MS		 106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107}
108
1da177e4 109/* UDF filesystem type */
152a0836
AV		 110static struct dentry *udf_mount(struct file_system_type *fs_type,
111 int flags, const char *dev_name, void *data)
1da177e4 112{
152a0836 113 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 114}
115
116static struct file_system_type udf_fstype = {
28de7948
CG		 117 .owner = THIS_MODULE,
118 .name = "udf",
152a0836 119 .mount = udf_mount,
28de7948
CG		 120 .kill_sb = kill_block_super,
121 .fs_flags = FS_REQUIRES_DEV,
1da177e4
LT		 122};
123
cb00ea35 124static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 125
126static struct inode *udf_alloc_inode(struct super_block *sb)
127{
128 struct udf_inode_info *ei;
3a71fc5d 129 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 130 if (!ei)
131 return NULL;
95f8797f
DB		 132
133 ei->i_unique = 0;
134 ei->i_lenExtents = 0;
135 ei->i_next_alloc_block = 0;
136 ei->i_next_alloc_goal = 0;
137 ei->i_strat4096 = 0;
138
1da177e4
LT		 139 return &ei->vfs_inode;
140}
141
fa0d7e3d 142static void udf_i_callback(struct rcu_head *head)
1da177e4 143{
fa0d7e3d
NP		 144 struct inode *inode = container_of(head, struct inode, i_rcu);
145 INIT_LIST_HEAD(&inode->i_dentry);
1da177e4
LT		 146 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
147}
148
fa0d7e3d
NP		 149static void udf_destroy_inode(struct inode *inode)
150{
151 call_rcu(&inode->i_rcu, udf_i_callback);
152}
153
51cc5068 154static void init_once(void *foo)
1da177e4 155{
cb00ea35 156 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 157
a35afb83
CL		 158 ei->i_ext.i_data = NULL;
159 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 160}
161
162static int init_inodecache(void)
163{
164 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
165 sizeof(struct udf_inode_info),
cb00ea35
CG		 166 0, (SLAB_RECLAIM_ACCOUNT |
167 SLAB_MEM_SPREAD),
20c2df83 168 init_once);
28de7948 169 if (!udf_inode_cachep)
1da177e4
LT		 170 return -ENOMEM;
171 return 0;
172}
173
174static void destroy_inodecache(void)
175{
1a1d92c1 176 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 177}
178
179/* Superblock operations */
ee9b6d61 180static const struct super_operations udf_sb_ops = {
28de7948
CG		 181 .alloc_inode = udf_alloc_inode,
182 .destroy_inode = udf_destroy_inode,
183 .write_inode = udf_write_inode,
3aac2b62 184 .evict_inode = udf_evict_inode,
28de7948 185 .put_super = udf_put_super,
146bca72 186 .sync_fs = udf_sync_fs,
28de7948
CG		 187 .statfs = udf_statfs,
188 .remount_fs = udf_remount_fs,
6da80894 189 .show_options = udf_show_options,
1da177e4
LT		 190};
191
cb00ea35 192struct udf_options {
1da177e4
LT		 193 unsigned char novrs;
194 unsigned int blocksize;
195 unsigned int session;
196 unsigned int lastblock;
197 unsigned int anchor;
198 unsigned int volume;
199 unsigned short partition;
200 unsigned int fileset;
201 unsigned int rootdir;
202 unsigned int flags;
203 mode_t umask;
204 gid_t gid;
205 uid_t uid;
7ac9bcd5
MS		 206 mode_t fmode;
207 mode_t dmode;
1da177e4
LT		 208 struct nls_table *nls_map;
209};
210
211static int __init init_udf_fs(void)
212{
213 int err;
28de7948 214
1da177e4
LT		 215 err = init_inodecache();
216 if (err)
217 goto out1;
218 err = register_filesystem(&udf_fstype);
219 if (err)
220 goto out;
28de7948 221
1da177e4 222 return 0;
28de7948
CG		 223
224out:
1da177e4 225 destroy_inodecache();
28de7948
CG		 226
227out1:
1da177e4
LT		 228 return err;
229}
230
231static void __exit exit_udf_fs(void)
232{
233 unregister_filesystem(&udf_fstype);
234 destroy_inodecache();
235}
236
237module_init(init_udf_fs)
28de7948 238module_exit(exit_udf_fs)
1da177e4 239
dc5d39be
MS		 240static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
241{
242 struct udf_sb_info *sbi = UDF_SB(sb);
243
244 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
245 GFP_KERNEL);
246 if (!sbi->s_partmaps) {
8e24eea7 247 udf_error(sb, __func__,
dc5d39be
MS		 248 "Unable to allocate space for %d partition maps",
249 count);
250 sbi->s_partitions = 0;
251 return -ENOMEM;
252 }
253
254 sbi->s_partitions = count;
255 return 0;
256}
257
6da80894
MS		 258static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
259{
260 struct super_block *sb = mnt->mnt_sb;
261 struct udf_sb_info *sbi = UDF_SB(sb);
262
263 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
264 seq_puts(seq, ",nostrict");
1197e4df 265 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 266 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
267 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
268 seq_puts(seq, ",unhide");
269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
270 seq_puts(seq, ",undelete");
271 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
272 seq_puts(seq, ",noadinicb");
273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
274 seq_puts(seq, ",shortad");
275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
276 seq_puts(seq, ",uid=forget");
277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
278 seq_puts(seq, ",uid=ignore");
279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
280 seq_puts(seq, ",gid=forget");
281 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
282 seq_puts(seq, ",gid=ignore");
283 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
284 seq_printf(seq, ",uid=%u", sbi->s_uid);
285 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
286 seq_printf(seq, ",gid=%u", sbi->s_gid);
287 if (sbi->s_umask != 0)
288 seq_printf(seq, ",umask=%o", sbi->s_umask);
87bc730c 289 if (sbi->s_fmode != UDF_INVALID_MODE)
7ac9bcd5 290 seq_printf(seq, ",mode=%o", sbi->s_fmode);
87bc730c 291 if (sbi->s_dmode != UDF_INVALID_MODE)
7ac9bcd5 292 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
6da80894
MS		 293 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
294 seq_printf(seq, ",session=%u", sbi->s_session);
295 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
296 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 297 if (sbi->s_anchor != 0)
298 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 299 /*
300 * volume, partition, fileset and rootdir seem to be ignored
301 * currently
302 */
303 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
304 seq_puts(seq, ",utf8");
305 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
306 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
307
308 return 0;
309}
310
1da177e4
LT		 311/*
312 * udf_parse_options
313 *
314 * PURPOSE
315 * Parse mount options.
316 *
317 * DESCRIPTION
318 * The following mount options are supported:
319 *
320 * gid= Set the default group.
321 * umask= Set the default umask.
7ac9bcd5
MS		 322 * mode= Set the default file permissions.
323 * dmode= Set the default directory permissions.
1da177e4
LT		 324 * uid= Set the default user.
325 * bs= Set the block size.
326 * unhide Show otherwise hidden files.
327 * undelete Show deleted files in lists.
328 * adinicb Embed data in the inode (default)
329 * noadinicb Don't embed data in the inode
330 * shortad Use short ad's
331 * longad Use long ad's (default)
332 * nostrict Unset strict conformance
333 * iocharset= Set the NLS character set
334 *
335 * The remaining are for debugging and disaster recovery:
336 *
28de7948 337 * novrs Skip volume sequence recognition
1da177e4
LT		 338 *
339 * The following expect a offset from 0.
340 *
341 * session= Set the CDROM session (default= last session)
342 * anchor= Override standard anchor location. (default= 256)
343 * volume= Override the VolumeDesc location. (unused)
344 * partition= Override the PartitionDesc location. (unused)
345 * lastblock= Set the last block of the filesystem/
346 *
347 * The following expect a offset from the partition root.
348 *
349 * fileset= Override the fileset block location. (unused)
350 * rootdir= Override the root directory location. (unused)
351 * WARNING: overriding the rootdir to a non-directory may
352 * yield highly unpredictable results.
353 *
354 * PRE-CONDITIONS
355 * options Pointer to mount options string.
356 * uopts Pointer to mount options variable.
357 *
358 * POST-CONDITIONS
359 * <return> 1 Mount options parsed okay.
360 * <return> 0 Error parsing mount options.
361 *
362 * HISTORY
363 * July 1, 1997 - Andrew E. Mileski
364 * Written, tested, and released.
365 */
28de7948 366
1da177e4
LT		 367enum {
368 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
369 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
370 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
371 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
372 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 373 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
374 Opt_fmode, Opt_dmode
1da177e4
LT		 375};
376
a447c093 377static const match_table_t tokens = {
28de7948
CG		 378 {Opt_novrs, "novrs"},
379 {Opt_nostrict, "nostrict"},
380 {Opt_bs, "bs=%u"},
381 {Opt_unhide, "unhide"},
382 {Opt_undelete, "undelete"},
383 {Opt_noadinicb, "noadinicb"},
384 {Opt_adinicb, "adinicb"},
385 {Opt_shortad, "shortad"},
386 {Opt_longad, "longad"},
387 {Opt_uforget, "uid=forget"},
388 {Opt_uignore, "uid=ignore"},
389 {Opt_gforget, "gid=forget"},
390 {Opt_gignore, "gid=ignore"},
391 {Opt_gid, "gid=%u"},
392 {Opt_uid, "uid=%u"},
393 {Opt_umask, "umask=%o"},
394 {Opt_session, "session=%u"},
395 {Opt_lastblock, "lastblock=%u"},
396 {Opt_anchor, "anchor=%u"},
397 {Opt_volume, "volume=%u"},
398 {Opt_partition, "partition=%u"},
399 {Opt_fileset, "fileset=%u"},
400 {Opt_rootdir, "rootdir=%u"},
401 {Opt_utf8, "utf8"},
402 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 403 {Opt_fmode, "mode=%o"},
404 {Opt_dmode, "dmode=%o"},
28de7948 405 {Opt_err, NULL}
1da177e4
LT		 406};
407
6da80894
MS		 408static int udf_parse_options(char *options, struct udf_options *uopt,
409 bool remount)
1da177e4
LT		 410{
411 char *p;
412 int option;
413
414 uopt->novrs = 0;
1da177e4
LT		 415 uopt->partition = 0xFFFF;
416 uopt->session = 0xFFFFFFFF;
417 uopt->lastblock = 0;
418 uopt->anchor = 0;
419 uopt->volume = 0xFFFFFFFF;
420 uopt->rootdir = 0xFFFFFFFF;
421 uopt->fileset = 0xFFFFFFFF;
422 uopt->nls_map = NULL;
423
424 if (!options)
425 return 1;
426
cb00ea35 427 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 428 substring_t args[MAX_OPT_ARGS];
429 int token;
430 if (!*p)
431 continue;
432
433 token = match_token(p, tokens, args);
cb00ea35
CG		 434 switch (token) {
435 case Opt_novrs:
436 uopt->novrs = 1;
4136801a 437 break;
cb00ea35
CG		 438 case Opt_bs:
439 if (match_int(&args[0], &option))
440 return 0;
441 uopt->blocksize = option;
1197e4df 442 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 443 break;
444 case Opt_unhide:
445 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
446 break;
447 case Opt_undelete:
448 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
449 break;
450 case Opt_noadinicb:
451 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
452 break;
453 case Opt_adinicb:
454 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
455 break;
456 case Opt_shortad:
457 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
458 break;
459 case Opt_longad:
460 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
461 break;
462 case Opt_gid:
463 if (match_int(args, &option))
464 return 0;
465 uopt->gid = option;
ca76d2d8 466 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 467 break;
468 case Opt_uid:
469 if (match_int(args, &option))
470 return 0;
471 uopt->uid = option;
ca76d2d8 472 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 473 break;
474 case Opt_umask:
475 if (match_octal(args, &option))
476 return 0;
477 uopt->umask = option;
478 break;
479 case Opt_nostrict:
480 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
481 break;
482 case Opt_session:
483 if (match_int(args, &option))
484 return 0;
485 uopt->session = option;
6da80894
MS		 486 if (!remount)
487 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 488 break;
489 case Opt_lastblock:
490 if (match_int(args, &option))
491 return 0;
492 uopt->lastblock = option;
6da80894
MS		 493 if (!remount)
494 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 495 break;
496 case Opt_anchor:
497 if (match_int(args, &option))
498 return 0;
499 uopt->anchor = option;
500 break;
501 case Opt_volume:
502 if (match_int(args, &option))
503 return 0;
504 uopt->volume = option;
505 break;
506 case Opt_partition:
507 if (match_int(args, &option))
508 return 0;
509 uopt->partition = option;
510 break;
511 case Opt_fileset:
512 if (match_int(args, &option))
513 return 0;
514 uopt->fileset = option;
515 break;
516 case Opt_rootdir:
517 if (match_int(args, &option))
518 return 0;
519 uopt->rootdir = option;
520 break;
521 case Opt_utf8:
522 uopt->flags |= (1 << UDF_FLAG_UTF8);
523 break;
1da177e4 524#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 525 case Opt_iocharset:
526 uopt->nls_map = load_nls(args[0].from);
527 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
528 break;
1da177e4 529#endif
cb00ea35
CG		 530 case Opt_uignore:
531 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
532 break;
533 case Opt_uforget:
534 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
535 break;
536 case Opt_gignore:
537 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
538 break;
539 case Opt_gforget:
540 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
541 break;
7ac9bcd5
MS		 542 case Opt_fmode:
543 if (match_octal(args, &option))
544 return 0;
545 uopt->fmode = option & 0777;
546 break;
547 case Opt_dmode:
548 if (match_octal(args, &option))
549 return 0;
550 uopt->dmode = option & 0777;
551 break;
cb00ea35
CG		 552 default:
553 printk(KERN_ERR "udf: bad mount option \"%s\" "
554 "or missing value\n", p);
1da177e4
LT		 555 return 0;
556 }
557 }
558 return 1;
559}
560
cb00ea35 561static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 562{
563 struct udf_options uopt;
6c79e987 564 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 565 int error = 0;
1da177e4 566
6c79e987
MS		 567 uopt.flags = sbi->s_flags;
568 uopt.uid = sbi->s_uid;
569 uopt.gid = sbi->s_gid;
570 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 571 uopt.fmode = sbi->s_fmode;
572 uopt.dmode = sbi->s_dmode;
1da177e4 573
6da80894 574 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 575 return -EINVAL;
576
337eb00a 577 lock_kernel();
6c79e987
MS		 578 sbi->s_flags = uopt.flags;
579 sbi->s_uid = uopt.uid;
580 sbi->s_gid = uopt.gid;
581 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 582 sbi->s_fmode = uopt.fmode;
583 sbi->s_dmode = uopt.dmode;
1da177e4 584
6c79e987
MS		 585 if (sbi->s_lvid_bh) {
586 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
1da177e4
LT		 587 if (write_rev > UDF_MAX_WRITE_VERSION)
588 *flags |= MS_RDONLY;
589 }
590
c79d967d
CH		 591 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
592 goto out_unlock;
593
36350462 594 if (*flags & MS_RDONLY)
1da177e4 595 udf_close_lvid(sb);
36350462 596 else
1da177e4
LT		 597 udf_open_lvid(sb);
598
c79d967d 599out_unlock:
337eb00a 600 unlock_kernel();
c79d967d 601 return error;
1da177e4
LT		 602}
603
40346005
JK		 604/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
605/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
606static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 607{
608 struct volStructDesc *vsd = NULL;
f4bcbbd9 609 loff_t sector = 32768;
1da177e4
LT		 610 int sectorsize;
611 struct buffer_head *bh = NULL;
cb00ea35
CG		 612 int nsr02 = 0;
613 int nsr03 = 0;
6c79e987 614 struct udf_sb_info *sbi;
1da177e4 615
6c79e987 616 sbi = UDF_SB(sb);
1da177e4
LT		 617 if (sb->s_blocksize < sizeof(struct volStructDesc))
618 sectorsize = sizeof(struct volStructDesc);
619 else
620 sectorsize = sb->s_blocksize;
621
6c79e987 622 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 623
624 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 625 (unsigned int)(sector >> sb->s_blocksize_bits),
626 sb->s_blocksize);
1da177e4 627 /* Process the sequence (if applicable) */
cb00ea35 628 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 629 /* Read a block */
630 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
631 if (!bh)
632 break;
633
634 /* Look for ISO descriptors */
635 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 636 (sector & (sb->s_blocksize - 1)));
1da177e4 637
cb00ea35 638 if (vsd->stdIdent[0] == 0) {
3bf25cb4 639 brelse(bh);
1da177e4 640 break;
3a71fc5d
MS		 641 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
642 VSD_STD_ID_LEN)) {
cb00ea35
CG		 643 switch (vsd->structType) {
644 case 0:
645 udf_debug("ISO9660 Boot Record found\n");
646 break;
647 case 1:
3a71fc5d
MS		 648 udf_debug("ISO9660 Primary Volume Descriptor "
649 "found\n");
cb00ea35
CG		 650 break;
651 case 2:
3a71fc5d
MS		 652 udf_debug("ISO9660 Supplementary Volume "
653 "Descriptor found\n");
cb00ea35
CG		 654 break;
655 case 3:
3a71fc5d
MS		 656 udf_debug("ISO9660 Volume Partition Descriptor "
657 "found\n");
cb00ea35
CG		 658 break;
659 case 255:
3a71fc5d
MS		 660 udf_debug("ISO9660 Volume Descriptor Set "
661 "Terminator found\n");
cb00ea35
CG		 662 break;
663 default:
664 udf_debug("ISO9660 VRS (%u) found\n",
665 vsd->structType);
666 break;
1da177e4 667 }
3a71fc5d
MS		 668 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
669 VSD_STD_ID_LEN))
670 ; /* nothing */
671 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
672 VSD_STD_ID_LEN)) {
3bf25cb4 673 brelse(bh);
1da177e4 674 break;
3a71fc5d
MS		 675 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
676 VSD_STD_ID_LEN))
1da177e4 677 nsr02 = sector;
3a71fc5d
MS		 678 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
679 VSD_STD_ID_LEN))
1da177e4 680 nsr03 = sector;
3bf25cb4 681 brelse(bh);
1da177e4
LT		 682 }
683
684 if (nsr03)
685 return nsr03;
686 else if (nsr02)
687 return nsr02;
6c79e987 688 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 689 return -1;
690 else
691 return 0;
692}
693
3a71fc5d 694static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 695 struct kernel_lb_addr *fileset,
696 struct kernel_lb_addr *root)
1da177e4
LT		 697{
698 struct buffer_head *bh = NULL;
699 long lastblock;
700 uint16_t ident;
6c79e987 701 struct udf_sb_info *sbi;
1da177e4
LT		 702
703 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 704 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 705 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 706
28de7948 707 if (!bh) {
1da177e4 708 return 1;
28de7948 709 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 710 brelse(bh);
1da177e4
LT		 711 return 1;
712 }
cb00ea35 713
1da177e4
LT		 714 }
715
6c79e987 716 sbi = UDF_SB(sb);
3a71fc5d
MS		 717 if (!bh) {
718 /* Search backwards through the partitions */
5ca4e4be 719 struct kernel_lb_addr newfileset;
1da177e4 720
28de7948 721/* --> cvg: FIXME - is it reasonable? */
1da177e4 722 return 1;
cb00ea35 723
6c79e987 724 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 725 (newfileset.partitionReferenceNum != 0xFFFF &&
726 fileset->logicalBlockNum == 0xFFFFFFFF &&
727 fileset->partitionReferenceNum == 0xFFFF);
728 newfileset.partitionReferenceNum--) {
6c79e987
MS		 729 lastblock = sbi->s_partmaps
730 [newfileset.partitionReferenceNum]
731 .s_partition_len;
1da177e4
LT		 732 newfileset.logicalBlockNum = 0;
733
cb00ea35 734 do {
97e961fd 735 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 736 &ident);
cb00ea35
CG		 737 if (!bh) {
738 newfileset.logicalBlockNum++;
1da177e4
LT		 739 continue;
740 }
741
cb00ea35
CG		 742 switch (ident) {
743 case TAG_IDENT_SBD:
28de7948
CG		 744 {
745 struct spaceBitmapDesc *sp;
4b11111a
MS		 746 sp = (struct spaceBitmapDesc *)
747 bh->b_data;
28de7948
CG		 748 newfileset.logicalBlockNum += 1 +
749 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 750 sizeof(struct spaceBitmapDesc)
751 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 752 brelse(bh);
753 break;
754 }
cb00ea35 755 case TAG_IDENT_FSD:
28de7948
CG		 756 *fileset = newfileset;
757 break;
cb00ea35 758 default:
28de7948
CG		 759 newfileset.logicalBlockNum++;
760 brelse(bh);
761 bh = NULL;
762 break;
1da177e4 763 }
28de7948
CG		 764 } while (newfileset.logicalBlockNum < lastblock &&
765 fileset->logicalBlockNum == 0xFFFFFFFF &&
766 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 767 }
768 }
769
770 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 771 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 772 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 773 fileset->logicalBlockNum,
774 fileset->partitionReferenceNum);
1da177e4 775
6c79e987 776 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 777 udf_load_fileset(sb, bh, root);
3bf25cb4 778 brelse(bh);
1da177e4
LT		 779 return 0;
780 }
781 return 1;
782}
783
c0eb31ed 784static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 785{
786 struct primaryVolDesc *pvoldesc;
ba9aadd8 787 struct ustr *instr, *outstr;
c0eb31ed
JK		 788 struct buffer_head *bh;
789 uint16_t ident;
ba9aadd8
MS		 790 int ret = 1;
791
792 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
793 if (!instr)
794 return 1;
795
796 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
797 if (!outstr)
798 goto out1;
c0eb31ed
JK		 799
800 bh = udf_read_tagged(sb, block, block, &ident);
801 if (!bh)
ba9aadd8
MS		 802 goto out2;
803
c0eb31ed 804 BUG_ON(ident != TAG_IDENT_PVD);
1da177e4
LT		 805
806 pvoldesc = (struct primaryVolDesc *)bh->b_data;
807
56774805
MS		 808 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
809 pvoldesc->recordingDateAndTime)) {
af15a298 810#ifdef UDFFS_DEBUG
5ca4e4be 811 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
cbf5676a 812 udf_debug("recording time %04u/%02u/%02u"
3a71fc5d 813 " %02u:%02u (%x)\n",
af15a298
MS		 814 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
815 ts->minute, le16_to_cpu(ts->typeAndTimezone));
816#endif
1da177e4
LT		 817 }
818
ba9aadd8
MS		 819 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
820 if (udf_CS0toUTF8(outstr, instr)) {
821 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
822 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a
MS		 823 udf_debug("volIdent[] = '%s'\n",
824 UDF_SB(sb)->s_volume_ident);
1da177e4 825 }
1da177e4 826
ba9aadd8
MS		 827 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
828 if (udf_CS0toUTF8(outstr, instr))
829 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed
JK		 830
831 brelse(bh);
ba9aadd8
MS		 832 ret = 0;
833out2:
834 kfree(outstr);
835out1:
836 kfree(instr);
837 return ret;
1da177e4
LT		 838}
839
bfb257a5
JK		 840static int udf_load_metadata_files(struct super_block *sb, int partition)
841{
842 struct udf_sb_info *sbi = UDF_SB(sb);
843 struct udf_part_map *map;
844 struct udf_meta_data *mdata;
5ca4e4be 845 struct kernel_lb_addr addr;
bfb257a5
JK		 846 int fe_error = 0;
847
848 map = &sbi->s_partmaps[partition];
849 mdata = &map->s_type_specific.s_metadata;
850
851 /* metadata address */
852 addr.logicalBlockNum = mdata->s_meta_file_loc;
853 addr.partitionReferenceNum = map->s_partition_num;
854
855 udf_debug("Metadata file location: block = %d part = %d\n",
856 addr.logicalBlockNum, addr.partitionReferenceNum);
857
97e961fd 858 mdata->s_metadata_fe = udf_iget(sb, &addr);
bfb257a5
JK		 859
860 if (mdata->s_metadata_fe == NULL) {
861 udf_warning(sb, __func__, "metadata inode efe not found, "
862 "will try mirror inode.");
863 fe_error = 1;
864 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
865 ICBTAG_FLAG_AD_SHORT) {
866 udf_warning(sb, __func__, "metadata inode efe does not have "
867 "short allocation descriptors!");
868 fe_error = 1;
869 iput(mdata->s_metadata_fe);
870 mdata->s_metadata_fe = NULL;
871 }
872
873 /* mirror file entry */
874 addr.logicalBlockNum = mdata->s_mirror_file_loc;
875 addr.partitionReferenceNum = map->s_partition_num;
876
877 udf_debug("Mirror metadata file location: block = %d part = %d\n",
878 addr.logicalBlockNum, addr.partitionReferenceNum);
879
97e961fd 880 mdata->s_mirror_fe = udf_iget(sb, &addr);
bfb257a5
JK		 881
882 if (mdata->s_mirror_fe == NULL) {
883 if (fe_error) {
884 udf_error(sb, __func__, "mirror inode efe not found "
885 "and metadata inode is missing too, exiting...");
886 goto error_exit;
887 } else
888 udf_warning(sb, __func__, "mirror inode efe not found,"
889 " but metadata inode is OK");
890 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
891 ICBTAG_FLAG_AD_SHORT) {
892 udf_warning(sb, __func__, "mirror inode efe does not have "
893 "short allocation descriptors!");
894 iput(mdata->s_mirror_fe);
895 mdata->s_mirror_fe = NULL;
896 if (fe_error)
897 goto error_exit;
898 }
899
900 /*
901 * bitmap file entry
902 * Note:
903 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
904 */
905 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
906 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
907 addr.partitionReferenceNum = map->s_partition_num;
908
909 udf_debug("Bitmap file location: block = %d part = %d\n",
910 addr.logicalBlockNum, addr.partitionReferenceNum);
911
97e961fd 912 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 913
914 if (mdata->s_bitmap_fe == NULL) {
915 if (sb->s_flags & MS_RDONLY)
916 udf_warning(sb, __func__, "bitmap inode efe "
917 "not found but it's ok since the disc"
918 " is mounted read-only");
919 else {
920 udf_error(sb, __func__, "bitmap inode efe not "
921 "found and attempted read-write mount");
922 goto error_exit;
923 }
924 }
925 }
926
927 udf_debug("udf_load_metadata_files Ok\n");
928
929 return 0;
930
931error_exit:
932 return 1;
933}
934
28de7948 935static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 936 struct kernel_lb_addr *root)
1da177e4
LT		 937{
938 struct fileSetDesc *fset;
939
940 fset = (struct fileSetDesc *)bh->b_data;
941
942 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
943
6c79e987 944 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 945
cb00ea35
CG		 946 udf_debug("Rootdir at block=%d, partition=%d\n",
947 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 948}
949
883cb9d1
MS		 950int udf_compute_nr_groups(struct super_block *sb, u32 partition)
951{
952 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 953 return DIV_ROUND_UP(map->s_partition_len +
954 (sizeof(struct spaceBitmapDesc) << 3),
955 sb->s_blocksize * 8);
883cb9d1
MS		 956}
957
66e1da3f
MS		 958static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
959{
66e1da3f
MS		 960 struct udf_bitmap *bitmap;
961 int nr_groups;
962 int size;
963
883cb9d1 964 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 965 size = sizeof(struct udf_bitmap) +
966 (sizeof(struct buffer_head *) * nr_groups);
967
968 if (size <= PAGE_SIZE)
969 bitmap = kmalloc(size, GFP_KERNEL);
970 else
971 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
972
973 if (bitmap == NULL) {
8e24eea7 974 udf_error(sb, __func__,
66e1da3f
MS		 975 "Unable to allocate space for bitmap "
976 "and %d buffer_head pointers", nr_groups);
977 return NULL;
978 }
979
980 memset(bitmap, 0x00, size);
981 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
982 bitmap->s_nr_groups = nr_groups;
983 return bitmap;
984}
985
3fb38dfa
JK		 986static int udf_fill_partdesc_info(struct super_block *sb,
987 struct partitionDesc *p, int p_index)
1da177e4 988{
6c79e987 989 struct udf_part_map *map;
165923fa 990 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 991 struct partitionHeaderDesc *phd;
165923fa 992
3fb38dfa 993 map = &sbi->s_partmaps[p_index];
165923fa
MS		 994
995 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
996 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
997
998 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
999 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1000 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1001 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1002 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1003 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1004 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1005 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1006
706047a7
SM		 1007 udf_debug("Partition (%d type %x) starts at physical %d, "
1008 "block length %d\n", p_index,
165923fa
MS		 1009 map->s_partition_type, map->s_partition_root,
1010 map->s_partition_len);
1011
1012 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1013 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1014 return 0;
165923fa
MS		 1015
1016 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1017 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1018 struct kernel_lb_addr loc = {
165923fa
MS		 1019 .logicalBlockNum = le32_to_cpu(
1020 phd->unallocSpaceTable.extPosition),
3fb38dfa 1021 .partitionReferenceNum = p_index,
165923fa
MS		 1022 };
1023
97e961fd 1024 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1025 if (!map->s_uspace.s_table) {
1026 udf_debug("cannot load unallocSpaceTable (part %d)\n",
3fb38dfa
JK		 1027 p_index);
1028 return 1;
165923fa
MS		 1029 }
1030 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1031 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
3fb38dfa 1032 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1033 }
1034
1035 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1036 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1037 if (!bitmap)
1038 return 1;
165923fa 1039 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1040 bitmap->s_extLength = le32_to_cpu(
165923fa 1041 phd->unallocSpaceBitmap.extLength);
2e0838fd 1042 bitmap->s_extPosition = le32_to_cpu(
165923fa 1043 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1044 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
3fb38dfa 1045 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1046 bitmap->s_extPosition);
165923fa
MS		 1047 }
1048
1049 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1050 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1051
1052 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1053 struct kernel_lb_addr loc = {
165923fa
MS		 1054 .logicalBlockNum = le32_to_cpu(
1055 phd->freedSpaceTable.extPosition),
3fb38dfa 1056 .partitionReferenceNum = p_index,
165923fa
MS		 1057 };
1058
97e961fd 1059 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1060 if (!map->s_fspace.s_table) {
3fb38dfa
JK		 1061 udf_debug("cannot load freedSpaceTable (part %d)\n",
1062 p_index);
1063 return 1;
165923fa
MS		 1064 }
1065
1066 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1067 udf_debug("freedSpaceTable (part %d) @ %ld\n",
3fb38dfa 1068 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1069 }
1070
1071 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1072 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1073 if (!bitmap)
1074 return 1;
165923fa 1075 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1076 bitmap->s_extLength = le32_to_cpu(
165923fa 1077 phd->freedSpaceBitmap.extLength);
2e0838fd 1078 bitmap->s_extPosition = le32_to_cpu(
165923fa 1079 phd->freedSpaceBitmap.extPosition);
2e0838fd 1080 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
3fb38dfa 1081 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1082 bitmap->s_extPosition);
165923fa 1083 }
3fb38dfa
JK		 1084 return 0;
1085}
1086
e971b0b9
JK		 1087static void udf_find_vat_block(struct super_block *sb, int p_index,
1088 int type1_index, sector_t start_block)
38b74a53
JK		 1089{
1090 struct udf_sb_info *sbi = UDF_SB(sb);
1091 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1092 sector_t vat_block;
5ca4e4be 1093 struct kernel_lb_addr ino;
e971b0b9
JK		 1094
1095 /*
1096 * VAT file entry is in the last recorded block. Some broken disks have
1097 * it a few blocks before so try a bit harder...
1098 */
1099 ino.partitionReferenceNum = type1_index;
1100 for (vat_block = start_block;
1101 vat_block >= map->s_partition_root &&
1102 vat_block >= start_block - 3 &&
1103 !sbi->s_vat_inode; vat_block--) {
1104 ino.logicalBlockNum = vat_block - map->s_partition_root;
1105 sbi->s_vat_inode = udf_iget(sb, &ino);
1106 }
1107}
1108
1109static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1110{
1111 struct udf_sb_info *sbi = UDF_SB(sb);
1112 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1113 struct buffer_head *bh = NULL;
1114 struct udf_inode_info *vati;
1115 uint32_t pos;
1116 struct virtualAllocationTable20 *vat20;
4bf17af0 1117 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1118
e971b0b9 1119 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1120 if (!sbi->s_vat_inode &&
1121 sbi->s_last_block != blocks - 1) {
1122 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1123 " last recorded block (%lu), retrying with the last "
1124 "block of the device (%lu).\n",
1125 (unsigned long)sbi->s_last_block,
1126 (unsigned long)blocks - 1);
e971b0b9 1127 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1128 }
38b74a53
JK		 1129 if (!sbi->s_vat_inode)
1130 return 1;
1131
1132 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1133 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1134 map->s_type_specific.s_virtual.s_num_entries =
1135 (sbi->s_vat_inode->i_size - 36) >> 2;
1136 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1137 vati = UDF_I(sbi->s_vat_inode);
1138 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1139 pos = udf_block_map(sbi->s_vat_inode, 0);
1140 bh = sb_bread(sb, pos);
1141 if (!bh)
1142 return 1;
1143 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1144 } else {
1145 vat20 = (struct virtualAllocationTable20 *)
1146 vati->i_ext.i_data;
1147 }
38b74a53 1148
38b74a53 1149 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1150 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1151 map->s_type_specific.s_virtual.s_num_entries =
1152 (sbi->s_vat_inode->i_size -
1153 map->s_type_specific.s_virtual.
1154 s_start_offset) >> 2;
1155 brelse(bh);
1156 }
1157 return 0;
1158}
1159
3fb38dfa
JK		 1160static int udf_load_partdesc(struct super_block *sb, sector_t block)
1161{
1162 struct buffer_head *bh;
1163 struct partitionDesc *p;
1164 struct udf_part_map *map;
1165 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1166 int i, type1_idx;
3fb38dfa
JK		 1167 uint16_t partitionNumber;
1168 uint16_t ident;
1169 int ret = 0;
1170
1171 bh = udf_read_tagged(sb, block, block, &ident);
1172 if (!bh)
1173 return 1;
1174 if (ident != TAG_IDENT_PD)
1175 goto out_bh;
1176
1177 p = (struct partitionDesc *)bh->b_data;
1178 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1179
bfb257a5 1180 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1181 for (i = 0; i < sbi->s_partitions; i++) {
1182 map = &sbi->s_partmaps[i];
1183 udf_debug("Searching map: (%d == %d)\n",
1184 map->s_partition_num, partitionNumber);
38b74a53
JK		 1185 if (map->s_partition_num == partitionNumber &&
1186 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1187 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1188 break;
1189 }
1190
38b74a53 1191 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1192 udf_debug("Partition (%d) not found in partition map\n",
1193 partitionNumber);
1194 goto out_bh;
1195 }
165923fa 1196
3fb38dfa 1197 ret = udf_fill_partdesc_info(sb, p, i);
38b74a53
JK		 1198
1199 /*
bfb257a5
JK		 1200 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1201 * PHYSICAL partitions are already set up
38b74a53
JK		 1202 */
1203 type1_idx = i;
1204 for (i = 0; i < sbi->s_partitions; i++) {
1205 map = &sbi->s_partmaps[i];
1206
1207 if (map->s_partition_num == partitionNumber &&
1208 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1209 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1210 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1211 break;
1212 }
1213
1214 if (i >= sbi->s_partitions)
1215 goto out_bh;
1216
1217 ret = udf_fill_partdesc_info(sb, p, i);
1218 if (ret)
1219 goto out_bh;
1220
bfb257a5
JK		 1221 if (map->s_partition_type == UDF_METADATA_MAP25) {
1222 ret = udf_load_metadata_files(sb, i);
1223 if (ret) {
1224 printk(KERN_ERR "UDF-fs: error loading MetaData "
1225 "partition map %d\n", i);
1226 goto out_bh;
1227 }
1228 } else {
1229 ret = udf_load_vat(sb, i, type1_idx);
1230 if (ret)
1231 goto out_bh;
1232 /*
1233 * Mark filesystem read-only if we have a partition with
1234 * virtual map since we don't handle writing to it (we
1235 * overwrite blocks instead of relocating them).
1236 */
1237 sb->s_flags |= MS_RDONLY;
1238 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1239 "because writing to pseudooverwrite partition is "
1240 "not implemented.\n");
1241 }
c0eb31ed 1242out_bh:
2e0838fd 1243 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1244 brelse(bh);
1245 return ret;
1da177e4
LT		 1246}
1247
c0eb31ed 1248static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1249 struct kernel_lb_addr *fileset)
1da177e4
LT		 1250{
1251 struct logicalVolDesc *lvd;
1252 int i, j, offset;
1253 uint8_t type;
6c79e987 1254 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1255 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1256 uint16_t ident;
1257 struct buffer_head *bh;
1258 int ret = 0;
1da177e4 1259
c0eb31ed
JK		 1260 bh = udf_read_tagged(sb, block, block, &ident);
1261 if (!bh)
1262 return 1;
1263 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4
LT		 1264 lvd = (struct logicalVolDesc *)bh->b_data;
1265
dc5d39be 1266 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
c0eb31ed
JK		 1267 if (i != 0) {
1268 ret = i;
1269 goto out_bh;
1270 }
1da177e4 1271
cb00ea35 1272 for (i = 0, offset = 0;
6c79e987 1273 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
4b11111a
MS		 1274 i++, offset += gpm->partitionMapLength) {
1275 struct udf_part_map *map = &sbi->s_partmaps[i];
1276 gpm = (struct genericPartitionMap *)
1277 &(lvd->partitionMaps[offset]);
1278 type = gpm->partitionMapType;
cb00ea35 1279 if (type == 1) {
4b11111a
MS		 1280 struct genericPartitionMap1 *gpm1 =
1281 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1282 map->s_partition_type = UDF_TYPE1_MAP15;
1283 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1284 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1285 map->s_partition_func = NULL;
cb00ea35 1286 } else if (type == 2) {
4b11111a
MS		 1287 struct udfPartitionMap2 *upm2 =
1288 (struct udfPartitionMap2 *)gpm;
1289 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1290 strlen(UDF_ID_VIRTUAL))) {
1291 u16 suf =
1292 le16_to_cpu(((__le16 *)upm2->partIdent.
1293 identSuffix)[0]);
c82a1275 1294 if (suf < 0x0200) {
4b11111a
MS		 1295 map->s_partition_type =
1296 UDF_VIRTUAL_MAP15;
1297 map->s_partition_func =
1298 udf_get_pblock_virt15;
c82a1275 1299 } else {
4b11111a
MS		 1300 map->s_partition_type =
1301 UDF_VIRTUAL_MAP20;
1302 map->s_partition_func =
1303 udf_get_pblock_virt20;
1da177e4 1304 }
4b11111a
MS		 1305 } else if (!strncmp(upm2->partIdent.ident,
1306 UDF_ID_SPARABLE,
1307 strlen(UDF_ID_SPARABLE))) {
1da177e4 1308 uint32_t loc;
1da177e4 1309 struct sparingTable *st;
4b11111a
MS		 1310 struct sparablePartitionMap *spm =
1311 (struct sparablePartitionMap *)gpm;
28de7948 1312
6c79e987 1313 map->s_partition_type = UDF_SPARABLE_MAP15;
4b11111a
MS		 1314 map->s_type_specific.s_sparing.s_packet_len =
1315 le16_to_cpu(spm->packetLength);
cb00ea35 1316 for (j = 0; j < spm->numSparingTables; j++) {
4b11111a
MS		 1317 struct buffer_head *bh2;
1318
1319 loc = le32_to_cpu(
1320 spm->locSparingTable[j]);
1321 bh2 = udf_read_tagged(sb, loc, loc,
1322 &ident);
1323 map->s_type_specific.s_sparing.
1324 s_spar_map[j] = bh2;
1325
165923fa
MS		 1326 if (bh2 == NULL)
1327 continue;
1328
1329 st = (struct sparingTable *)bh2->b_data;
1330 if (ident != 0 || strncmp(
1331 st->sparingIdent.ident,
1332 UDF_ID_SPARING,
1333 strlen(UDF_ID_SPARING))) {
1334 brelse(bh2);
1335 map->s_type_specific.s_sparing.
1336 s_spar_map[j] = NULL;
1da177e4
LT		 1337 }
1338 }
6c79e987 1339 map->s_partition_func = udf_get_pblock_spar15;
bfb257a5
JK		 1340 } else if (!strncmp(upm2->partIdent.ident,
1341 UDF_ID_METADATA,
1342 strlen(UDF_ID_METADATA))) {
1343 struct udf_meta_data *mdata =
1344 &map->s_type_specific.s_metadata;
1345 struct metadataPartitionMap *mdm =
1346 (struct metadataPartitionMap *)
1347 &(lvd->partitionMaps[offset]);
1348 udf_debug("Parsing Logical vol part %d "
1349 "type %d id=%s\n", i, type,
1350 UDF_ID_METADATA);
1351
1352 map->s_partition_type = UDF_METADATA_MAP25;
1353 map->s_partition_func = udf_get_pblock_meta25;
1354
1355 mdata->s_meta_file_loc =
1356 le32_to_cpu(mdm->metadataFileLoc);
1357 mdata->s_mirror_file_loc =
1358 le32_to_cpu(mdm->metadataMirrorFileLoc);
1359 mdata->s_bitmap_file_loc =
1360 le32_to_cpu(mdm->metadataBitmapFileLoc);
1361 mdata->s_alloc_unit_size =
1362 le32_to_cpu(mdm->allocUnitSize);
1363 mdata->s_align_unit_size =
1364 le16_to_cpu(mdm->alignUnitSize);
1365 mdata->s_dup_md_flag =
1366 mdm->flags & 0x01;
1367
1368 udf_debug("Metadata Ident suffix=0x%x\n",
1369 (le16_to_cpu(
1370 ((__le16 *)
1371 mdm->partIdent.identSuffix)[0])));
1372 udf_debug("Metadata part num=%d\n",
1373 le16_to_cpu(mdm->partitionNum));
1374 udf_debug("Metadata part alloc unit size=%d\n",
1375 le32_to_cpu(mdm->allocUnitSize));
1376 udf_debug("Metadata file loc=%d\n",
1377 le32_to_cpu(mdm->metadataFileLoc));
1378 udf_debug("Mirror file loc=%d\n",
1379 le32_to_cpu(mdm->metadataMirrorFileLoc));
1380 udf_debug("Bitmap file loc=%d\n",
1381 le32_to_cpu(mdm->metadataBitmapFileLoc));
1382 udf_debug("Duplicate Flag: %d %d\n",
1383 mdata->s_dup_md_flag, mdm->flags);
cb00ea35 1384 } else {
3a71fc5d
MS		 1385 udf_debug("Unknown ident: %s\n",
1386 upm2->partIdent.ident);
1da177e4
LT		 1387 continue;
1388 }
6c79e987
MS		 1389 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1390 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1391 }
1392 udf_debug("Partition (%d:%d) type %d on volume %d\n",
6c79e987
MS		 1393 i, map->s_partition_num, type,
1394 map->s_volumeseqnum);
1da177e4
LT		 1395 }
1396
cb00ea35 1397 if (fileset) {
5ca4e4be 1398 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1399
1400 *fileset = lelb_to_cpu(la->extLocation);
3a71fc5d
MS		 1401 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1402 "partition=%d\n", fileset->logicalBlockNum,
28de7948 1403 fileset->partitionReferenceNum);
1da177e4
LT		 1404 }
1405 if (lvd->integritySeqExt.extLength)
1406 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
28de7948 1407
c0eb31ed
JK		 1408out_bh:
1409 brelse(bh);
1410 return ret;
1da177e4
LT		 1411}
1412
1413/*
1414 * udf_load_logicalvolint
1415 *
1416 */
5ca4e4be 1417static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1418{
1419 struct buffer_head *bh = NULL;
1420 uint16_t ident;
6c79e987
MS		 1421 struct udf_sb_info *sbi = UDF_SB(sb);
1422 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1423
1424 while (loc.extLength > 0 &&
cb00ea35
CG		 1425 (bh = udf_read_tagged(sb, loc.extLocation,
1426 loc.extLocation, &ident)) &&
1427 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1428 sbi->s_lvid_bh = bh;
1429 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1430
6c79e987 1431 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1432 udf_load_logicalvolint(sb,
6c79e987 1433 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1434
6c79e987 1435 if (sbi->s_lvid_bh != bh)
3bf25cb4 1436 brelse(bh);
1da177e4 1437 loc.extLength -= sb->s_blocksize;
cb00ea35 1438 loc.extLocation++;
1da177e4 1439 }
6c79e987 1440 if (sbi->s_lvid_bh != bh)
3bf25cb4 1441 brelse(bh);
1da177e4
LT		 1442}
1443
1444/*
1445 * udf_process_sequence
1446 *
1447 * PURPOSE
1448 * Process a main/reserve volume descriptor sequence.
1449 *
1450 * PRE-CONDITIONS
1451 * sb Pointer to _locked_ superblock.
1452 * block First block of first extent of the sequence.
1453 * lastblock Lastblock of first extent of the sequence.
1454 *
1455 * HISTORY
1456 * July 1, 1997 - Andrew E. Mileski
1457 * Written, tested, and released.
1458 */
200a3592 1459static noinline int udf_process_sequence(struct super_block *sb, long block,
5ca4e4be 1460 long lastblock, struct kernel_lb_addr *fileset)
1da177e4
LT		 1461{
1462 struct buffer_head *bh = NULL;
1463 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1464 struct udf_vds_record *curr;
1da177e4
LT		 1465 struct generic_desc *gd;
1466 struct volDescPtr *vdp;
cb00ea35 1467 int done = 0;
1da177e4
LT		 1468 uint32_t vdsn;
1469 uint16_t ident;
1470 long next_s = 0, next_e = 0;
1471
1472 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1473
c0eb31ed
JK		 1474 /*
1475 * Read the main descriptor sequence and find which descriptors
1476 * are in it.
1477 */
cb00ea35 1478 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1479
1480 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed
JK		 1481 if (!bh) {
1482 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1483 "sequence is corrupted or we could not read "
1484 "it.\n", (unsigned long long)block);
1485 return 1;
1486 }
1da177e4
LT		 1487
1488 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1489 gd = (struct generic_desc *)bh->b_data;
1490 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1491 switch (ident) {
28de7948 1492 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1493 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1494 if (vdsn >= curr->volDescSeqNum) {
1495 curr->volDescSeqNum = vdsn;
1496 curr->block = block;
cb00ea35
CG		 1497 }
1498 break;
28de7948 1499 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1500 curr = &vds[VDS_POS_VOL_DESC_PTR];
1501 if (vdsn >= curr->volDescSeqNum) {
1502 curr->volDescSeqNum = vdsn;
1503 curr->block = block;
cb00ea35
CG		 1504
1505 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1506 next_s = le32_to_cpu(
1507 vdp->nextVolDescSeqExt.extLocation);
1508 next_e = le32_to_cpu(
1509 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1510 next_e = next_e >> sb->s_blocksize_bits;
1511 next_e += next_s;
1512 }
1513 break;
28de7948 1514 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1515 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1516 if (vdsn >= curr->volDescSeqNum) {
1517 curr->volDescSeqNum = vdsn;
1518 curr->block = block;
cb00ea35
CG		 1519 }
1520 break;
28de7948 1521 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1522 curr = &vds[VDS_POS_PARTITION_DESC];
1523 if (!curr->block)
1524 curr->block = block;
cb00ea35 1525 break;
28de7948 1526 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1527 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1528 if (vdsn >= curr->volDescSeqNum) {
1529 curr->volDescSeqNum = vdsn;
1530 curr->block = block;
cb00ea35
CG		 1531 }
1532 break;
28de7948 1533 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1534 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1535 if (vdsn >= curr->volDescSeqNum) {
1536 curr->volDescSeqNum = vdsn;
1537 curr->block = block;
cb00ea35
CG		 1538 }
1539 break;
28de7948 1540 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1541 vds[VDS_POS_TERMINATING_DESC].block = block;
1542 if (next_e) {
1543 block = next_s;
1544 lastblock = next_e;
1545 next_s = next_e = 0;
4b11111a 1546 } else
cb00ea35
CG		 1547 done = 1;
1548 break;
1da177e4 1549 }
3bf25cb4 1550 brelse(bh);
1da177e4 1551 }
c0eb31ed
JK		 1552 /*
1553 * Now read interesting descriptors again and process them
1554 * in a suitable order
1555 */
1556 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1557 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1558 return 1;
1559 }
1560 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1561 return 1;
165923fa 1562
c0eb31ed
JK		 1563 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1564 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1565 return 1;
165923fa 1566
c0eb31ed
JK		 1567 if (vds[VDS_POS_PARTITION_DESC].block) {
1568 /*
1569 * We rescan the whole descriptor sequence to find
1570 * partition descriptor blocks and process them.
1571 */
1572 for (block = vds[VDS_POS_PARTITION_DESC].block;
1573 block < vds[VDS_POS_TERMINATING_DESC].block;
1574 block++)
1575 if (udf_load_partdesc(sb, block))
165923fa 1576 return 1;
1da177e4
LT		 1577 }
1578
1579 return 0;
1580}
1581
40346005
JK		 1582static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1583 struct kernel_lb_addr *fileset)
1da177e4 1584{
40346005
JK		 1585 struct anchorVolDescPtr *anchor;
1586 long main_s, main_e, reserve_s, reserve_e;
1da177e4 1587
40346005
JK		 1588 anchor = (struct anchorVolDescPtr *)bh->b_data;
1589
1590 /* Locate the main sequence */
1591 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1592 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1593 main_e = main_e >> sb->s_blocksize_bits;
1594 main_e += main_s;
1595
1596 /* Locate the reserve sequence */
1597 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1598 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1599 reserve_e = reserve_e >> sb->s_blocksize_bits;
1600 reserve_e += reserve_s;
1601
1602 /* Process the main & reserve sequences */
1603 /* responsible for finding the PartitionDesc(s) */
1604 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1605 return 1;
1606 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1da177e4
LT		 1607}
1608
40346005
JK		 1609/*
1610 * Check whether there is an anchor block in the given block and
1611 * load Volume Descriptor Sequence if so.
1612 */
1613static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1614 struct kernel_lb_addr *fileset)
1197e4df 1615{
40346005
JK		 1616 struct buffer_head *bh;
1617 uint16_t ident;
1618 int ret;
1197e4df 1619
40346005
JK		 1620 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1621 udf_fixed_to_variable(block) >=
1622 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1197e4df 1623 return 0;
40346005
JK		 1624
1625 bh = udf_read_tagged(sb, block, block, &ident);
1626 if (!bh)
1197e4df 1627 return 0;
40346005
JK		 1628 if (ident != TAG_IDENT_AVDP) {
1629 brelse(bh);
1197e4df
CL		 1630 return 0;
1631 }
40346005
JK		 1632 ret = udf_load_sequence(sb, bh, fileset);
1633 brelse(bh);
1634 return ret;
1197e4df
CL		 1635}
1636
40346005
JK		 1637/* Search for an anchor volume descriptor pointer */
1638static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1639 struct kernel_lb_addr *fileset)
1da177e4 1640{
40346005 1641 sector_t last[6];
38b74a53 1642 int i;
40346005
JK		 1643 struct udf_sb_info *sbi = UDF_SB(sb);
1644 int last_count = 0;
1da177e4 1645
40346005
JK		 1646 /* First try user provided anchor */
1647 if (sbi->s_anchor) {
1648 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1649 return lastblock;
1650 }
1651 /*
1652 * according to spec, anchor is in either:
1653 * block 256
1654 * lastblock-256
1655 * lastblock
1656 * however, if the disc isn't closed, it could be 512.
1657 */
1658 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1659 return lastblock;
1660 /*
1661 * The trouble is which block is the last one. Drives often misreport
1662 * this so we try various possibilities.
1663 */
1664 last[last_count++] = lastblock;
1665 if (lastblock >= 1)
1666 last[last_count++] = lastblock - 1;
1667 last[last_count++] = lastblock + 1;
1668 if (lastblock >= 2)
1669 last[last_count++] = lastblock - 2;
1670 if (lastblock >= 150)
1671 last[last_count++] = lastblock - 150;
1672 if (lastblock >= 152)
1673 last[last_count++] = lastblock - 152;
1da177e4 1674
40346005
JK		 1675 for (i = 0; i < last_count; i++) {
1676 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1677 sb->s_blocksize_bits)
28f7c4d4 1678 continue;
40346005
JK		 1679 if (udf_check_anchor_block(sb, last[i], fileset))
1680 return last[i];
1681 if (last[i] < 256)
28f7c4d4 1682 continue;
40346005
JK		 1683 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1684 return last[i];
1685 }
28f7c4d4 1686
40346005
JK		 1687 /* Finally try block 512 in case media is open */
1688 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1689 return last[0];
1690 return 0;
1691}
28f7c4d4 1692
40346005
JK		 1693/*
1694 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1695 * area specified by it. The function expects sbi->s_lastblock to be the last
1696 * block on the media.
1697 *
1698 * Return 1 if ok, 0 if not found.
1699 *
1700 */
1701static int udf_find_anchor(struct super_block *sb,
1702 struct kernel_lb_addr *fileset)
1703{
1704 sector_t lastblock;
1705 struct udf_sb_info *sbi = UDF_SB(sb);
28f7c4d4 1706
40346005
JK		 1707 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1708 if (lastblock)
1709 goto out;
1da177e4 1710
40346005
JK		 1711 /* No anchor found? Try VARCONV conversion of block numbers */
1712 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1713 /* Firstly, we try to not convert number of the last block */
1714 lastblock = udf_scan_anchors(sb,
1715 udf_variable_to_fixed(sbi->s_last_block),
1716 fileset);
1717 if (lastblock)
1718 goto out;
1da177e4 1719
40346005
JK		 1720 /* Secondly, we try with converted number of the last block */
1721 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1722 if (!lastblock) {
1723 /* VARCONV didn't help. Clear it. */
1724 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1725 return 0;
1da177e4 1726 }
40346005
JK		 1727out:
1728 sbi->s_last_block = lastblock;
1729 return 1;
1730}
1da177e4 1731
40346005
JK		 1732/*
1733 * Check Volume Structure Descriptor, find Anchor block and load Volume
1734 * Descriptor Sequence
1735 */
1736static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1737 int silent, struct kernel_lb_addr *fileset)
1738{
1739 struct udf_sb_info *sbi = UDF_SB(sb);
1740 loff_t nsr_off;
1741
1742 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1743 if (!silent)
1744 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1745 return 0;
1746 }
1747 sbi->s_last_block = uopt->lastblock;
1748 if (!uopt->novrs) {
1749 /* Check that it is NSR02 compliant */
1750 nsr_off = udf_check_vsd(sb);
1751 if (!nsr_off) {
1752 if (!silent)
1753 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1754 return 0;
1755 }
1756 if (nsr_off == -1)
1757 udf_debug("Failed to read byte 32768. Assuming open "
1758 "disc. Skipping validity check\n");
1759 if (!sbi->s_last_block)
1760 sbi->s_last_block = udf_get_last_block(sb);
1761 } else {
1762 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1763 }
1da177e4 1764
40346005
JK		 1765 /* Look for anchor block and load Volume Descriptor Sequence */
1766 sbi->s_anchor = uopt->anchor;
1767 if (!udf_find_anchor(sb, fileset)) {
1768 if (!silent)
1769 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1770 return 0;
1771 }
1772 return 1;
1da177e4
LT		 1773}
1774
1775static void udf_open_lvid(struct super_block *sb)
1776{
6c79e987
MS		 1777 struct udf_sb_info *sbi = UDF_SB(sb);
1778 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1779 struct logicalVolIntegrityDesc *lvid;
1780 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1781
165923fa
MS		 1782 if (!bh)
1783 return;
165923fa
MS		 1784 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1785 lvidiu = udf_sb_lvidiu(sbi);
1786
1787 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1788 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1789 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1790 CURRENT_TIME);
146bca72 1791 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1792
1793 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1794 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1795 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1796
1797 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1798 mark_buffer_dirty(bh);
146bca72 1799 sbi->s_lvid_dirty = 0;
1da177e4
LT		 1800}
1801
1802static void udf_close_lvid(struct super_block *sb)
1803{
6c79e987
MS		 1804 struct udf_sb_info *sbi = UDF_SB(sb);
1805 struct buffer_head *bh = sbi->s_lvid_bh;
1806 struct logicalVolIntegrityDesc *lvid;
165923fa 1807 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1808
6c79e987
MS		 1809 if (!bh)
1810 return;
1811
1812 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
165923fa
MS		 1813 lvidiu = udf_sb_lvidiu(sbi);
1814 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1815 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1816 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1817 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1818 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1819 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1820 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1821 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1822 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1823 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1824
1825 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1826 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1827 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1828
1829 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1830 mark_buffer_dirty(bh);
146bca72 1831 sbi->s_lvid_dirty = 0;
1da177e4
LT		 1832}
1833
66e1da3f
MS		 1834static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1835{
1836 int i;
1837 int nr_groups = bitmap->s_nr_groups;
4b11111a
MS		 1838 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1839 nr_groups);
66e1da3f
MS		 1840
1841 for (i = 0; i < nr_groups; i++)
1842 if (bitmap->s_block_bitmap[i])
1843 brelse(bitmap->s_block_bitmap[i]);
1844
1845 if (size <= PAGE_SIZE)
1846 kfree(bitmap);
1847 else
1848 vfree(bitmap);
1849}
1850
2e0838fd
JK		 1851static void udf_free_partition(struct udf_part_map *map)
1852{
1853 int i;
bfb257a5 1854 struct udf_meta_data *mdata;
2e0838fd
JK		 1855
1856 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1857 iput(map->s_uspace.s_table);
1858 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1859 iput(map->s_fspace.s_table);
1860 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1861 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1862 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1863 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1864 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1865 for (i = 0; i < 4; i++)
1866 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
bfb257a5
JK		 1867 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1868 mdata = &map->s_type_specific.s_metadata;
1869 iput(mdata->s_metadata_fe);
1870 mdata->s_metadata_fe = NULL;
1871
1872 iput(mdata->s_mirror_fe);
1873 mdata->s_mirror_fe = NULL;
1874
1875 iput(mdata->s_bitmap_fe);
1876 mdata->s_bitmap_fe = NULL;
1877 }
2e0838fd
JK		 1878}
1879
1da177e4
LT		 1880static int udf_fill_super(struct super_block *sb, void *options, int silent)
1881{
1882 int i;
40346005 1883 int ret;
cb00ea35 1884 struct inode *inode = NULL;
1da177e4 1885 struct udf_options uopt;
5ca4e4be 1886 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 1887 struct udf_sb_info *sbi;
1888
db719222
JB		 1889 lock_kernel();
1890
1da177e4
LT		 1891 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1892 uopt.uid = -1;
1893 uopt.gid = -1;
1894 uopt.umask = 0;
87bc730c
MS		 1895 uopt.fmode = UDF_INVALID_MODE;
1896 uopt.dmode = UDF_INVALID_MODE;
1da177e4 1897
6c79e987 1898 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
db719222
JB		 1899 if (!sbi) {
1900 unlock_kernel();
1da177e4 1901 return -ENOMEM;
db719222 1902 }
28de7948 1903
1da177e4 1904 sb->s_fs_info = sbi;
1da177e4 1905
1e7933de 1906 mutex_init(&sbi->s_alloc_mutex);
1da177e4 1907
6da80894 1908 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 1909 goto error_out;
1910
1911 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 1912 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1da177e4 1913 udf_error(sb, "udf_read_super",
cb00ea35 1914 "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 1915 goto error_out;
1916 }
1917#ifdef CONFIG_UDF_NLS
cb00ea35 1918 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 1919 uopt.nls_map = load_nls_default();
1920 if (!uopt.nls_map)
1921 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1922 else
1923 udf_debug("Using default NLS map\n");
1924 }
1925#endif
1926 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1927 uopt.flags |= (1 << UDF_FLAG_UTF8);
1928
1929 fileset.logicalBlockNum = 0xFFFFFFFF;
1930 fileset.partitionReferenceNum = 0xFFFF;
1931
6c79e987
MS		 1932 sbi->s_flags = uopt.flags;
1933 sbi->s_uid = uopt.uid;
1934 sbi->s_gid = uopt.gid;
1935 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 1936 sbi->s_fmode = uopt.fmode;
1937 sbi->s_dmode = uopt.dmode;
6c79e987 1938 sbi->s_nls_map = uopt.nls_map;
1da177e4 1939
cb00ea35 1940 if (uopt.session == 0xFFFFFFFF)
6c79e987 1941 sbi->s_session = udf_get_last_session(sb);
1da177e4 1942 else
6c79e987 1943 sbi->s_session = uopt.session;
1da177e4 1944
6c79e987 1945 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 1946
40346005
JK		 1947 /* Fill in the rest of the superblock */
1948 sb->s_op = &udf_sb_ops;
1949 sb->s_export_op = &udf_export_ops;
123e9caf 1950
40346005
JK		 1951 sb->s_dirt = 0;
1952 sb->s_magic = UDF_SUPER_MAGIC;
1953 sb->s_time_gran = 1000;
1954
1197e4df 1955 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 1956 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 1957 } else {
e1defc4f 1958 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005
JK		 1959 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1960 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df
CL		 1961 if (!silent)
1962 printk(KERN_NOTICE
1963 "UDF-fs: Rescanning with blocksize "
1964 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1965 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 1966 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 1967 }
1da177e4 1968 }
40346005 1969 if (!ret) {
3a71fc5d 1970 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1da177e4
LT		 1971 goto error_out;
1972 }
1973
6c79e987 1974 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 1975
6c79e987 1976 if (sbi->s_lvid_bh) {
4b11111a
MS		 1977 struct logicalVolIntegrityDescImpUse *lvidiu =
1978 udf_sb_lvidiu(sbi);
6c79e987
MS		 1979 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1980 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
4b11111a
MS		 1981 /* uint16_t maxUDFWriteRev =
1982 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1da177e4 1983
cb00ea35 1984 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
4b11111a
MS		 1985 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1986 "(max is %x)\n",
6c79e987 1987 le16_to_cpu(lvidiu->minUDFReadRev),
cb00ea35 1988 UDF_MAX_READ_VERSION);
1da177e4 1989 goto error_out;
4b11111a 1990 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1da177e4 1991 sb->s_flags |= MS_RDONLY;
1da177e4 1992
6c79e987 1993 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 1994
1995 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1996 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1997 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1998 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1999 }
2000
6c79e987 2001 if (!sbi->s_partitions) {
3a71fc5d 2002 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1da177e4
LT		 2003 goto error_out;
2004 }
2005
4b11111a
MS		 2006 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2007 UDF_PART_FLAG_READ_ONLY) {
2008 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2009 "forcing readonly mount\n");
39b3f6d6 2010 sb->s_flags |= MS_RDONLY;
c1a26e7d 2011 }
39b3f6d6 2012
cb00ea35 2013 if (udf_find_fileset(sb, &fileset, &rootdir)) {
3a71fc5d 2014 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1da177e4
LT		 2015 goto error_out;
2016 }
2017
cb00ea35 2018 if (!silent) {
5ca4e4be 2019 struct timestamp ts;
56774805 2020 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
a9ca6635 2021 udf_info("UDF: Mounting volume '%s', "
28de7948 2022 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
56774805
MS		 2023 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2024 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2025 }
2026 if (!(sb->s_flags & MS_RDONLY))
2027 udf_open_lvid(sb);
2028
2029 /* Assign the root inode */
2030 /* assign inodes by physical block number */
2031 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2032 inode = udf_iget(sb, &rootdir);
cb00ea35 2033 if (!inode) {
4b11111a
MS		 2034 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2035 "partition=%d\n",
cb00ea35 2036 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1da177e4
LT		 2037 goto error_out;
2038 }
2039
2040 /* Allocate a dentry for the root inode */
2041 sb->s_root = d_alloc_root(inode);
cb00ea35 2042 if (!sb->s_root) {
3a71fc5d 2043 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1da177e4
LT		 2044 iput(inode);
2045 goto error_out;
2046 }
31170b6a 2047 sb->s_maxbytes = MAX_LFS_FILESIZE;
db719222 2048 unlock_kernel();
1da177e4
LT		 2049 return 0;
2050
28de7948 2051error_out:
6c79e987
MS		 2052 if (sbi->s_vat_inode)
2053 iput(sbi->s_vat_inode);
2e0838fd
JK		 2054 if (sbi->s_partitions)
2055 for (i = 0; i < sbi->s_partitions; i++)
2056 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2057#ifdef CONFIG_UDF_NLS
2058 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2059 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2060#endif
2061 if (!(sb->s_flags & MS_RDONLY))
2062 udf_close_lvid(sb);
6c79e987
MS		 2063 brelse(sbi->s_lvid_bh);
2064
2065 kfree(sbi->s_partmaps);
1da177e4
LT		 2066 kfree(sbi);
2067 sb->s_fs_info = NULL;
28de7948 2068
db719222 2069 unlock_kernel();
1da177e4
LT		 2070 return -EINVAL;
2071}
2072
b8145a76
AB		 2073static void udf_error(struct super_block *sb, const char *function,
2074 const char *fmt, ...)
1da177e4
LT		 2075{
2076 va_list args;
2077
cb00ea35 2078 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4
LT		 2079 /* mark sb error */
2080 sb->s_dirt = 1;
2081 }
2082 va_start(args, fmt);
4a6e617a 2083 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4 2084 va_end(args);
3a71fc5d 2085 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
28de7948 2086 sb->s_id, function, error_buf);
1da177e4
LT		 2087}
2088
2089void udf_warning(struct super_block *sb, const char *function,
cb00ea35 2090 const char *fmt, ...)
1da177e4
LT		 2091{
2092 va_list args;
2093
cb00ea35 2094 va_start(args, fmt);
4a6e617a 2095 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 2096 va_end(args);
2097 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
cb00ea35 2098 sb->s_id, function, error_buf);
1da177e4
LT		 2099}
2100
cb00ea35 2101static void udf_put_super(struct super_block *sb)
1da177e4
LT		 2102{
2103 int i;
6c79e987 2104 struct udf_sb_info *sbi;
1da177e4 2105
6c79e987 2106 sbi = UDF_SB(sb);
6cfd0148
CH		 2107
2108 lock_kernel();
2109
6c79e987
MS		 2110 if (sbi->s_vat_inode)
2111 iput(sbi->s_vat_inode);
2e0838fd
JK		 2112 if (sbi->s_partitions)
2113 for (i = 0; i < sbi->s_partitions; i++)
2114 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2115#ifdef CONFIG_UDF_NLS
2116 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2117 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2118#endif
2119 if (!(sb->s_flags & MS_RDONLY))
2120 udf_close_lvid(sb);
6c79e987
MS		 2121 brelse(sbi->s_lvid_bh);
2122 kfree(sbi->s_partmaps);
1da177e4
LT		 2123 kfree(sb->s_fs_info);
2124 sb->s_fs_info = NULL;
6cfd0148
CH		 2125
2126 unlock_kernel();
1da177e4
LT		 2127}
2128
146bca72
JK		 2129static int udf_sync_fs(struct super_block *sb, int wait)
2130{
2131 struct udf_sb_info *sbi = UDF_SB(sb);
2132
2133 mutex_lock(&sbi->s_alloc_mutex);
2134 if (sbi->s_lvid_dirty) {
2135 /*
2136 * Blockdevice will be synced later so we don't have to submit
2137 * the buffer for IO
2138 */
2139 mark_buffer_dirty(sbi->s_lvid_bh);
2140 sb->s_dirt = 0;
2141 sbi->s_lvid_dirty = 0;
2142 }
2143 mutex_unlock(&sbi->s_alloc_mutex);
2144
2145 return 0;
2146}
2147
cb00ea35 2148static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2149{
726c3342 2150 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2151 struct udf_sb_info *sbi = UDF_SB(sb);
2152 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2153 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987
MS		 2154
2155 if (sbi->s_lvid_bh != NULL)
2156 lvidiu = udf_sb_lvidiu(sbi);
2157 else
2158 lvidiu = NULL;
726c3342 2159
1da177e4
LT		 2160 buf->f_type = UDF_SUPER_MAGIC;
2161 buf->f_bsize = sb->s_blocksize;
6c79e987 2162 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2163 buf->f_bfree = udf_count_free(sb);
2164 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2165 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2166 le32_to_cpu(lvidiu->numDirs)) : 0)
2167 + buf->f_bfree;
1da177e4 2168 buf->f_ffree = buf->f_bfree;
cb00ea35 2169 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2170 buf->f_fsid.val[0] = (u32)id;
2171 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2172
2173 return 0;
2174}
2175
4b11111a
MS		 2176static unsigned int udf_count_free_bitmap(struct super_block *sb,
2177 struct udf_bitmap *bitmap)
1da177e4
LT		 2178{
2179 struct buffer_head *bh = NULL;
2180 unsigned int accum = 0;
2181 int index;
2182 int block = 0, newblock;
5ca4e4be 2183 struct kernel_lb_addr loc;
1da177e4 2184 uint32_t bytes;
1da177e4
LT		 2185 uint8_t *ptr;
2186 uint16_t ident;
2187 struct spaceBitmapDesc *bm;
2188
2189 lock_kernel();
2190
2191 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2192 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2193 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2194
cb00ea35 2195 if (!bh) {
1da177e4
LT		 2196 printk(KERN_ERR "udf: udf_count_free failed\n");
2197 goto out;
cb00ea35 2198 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2199 brelse(bh);
1da177e4
LT		 2200 printk(KERN_ERR "udf: udf_count_free failed\n");
2201 goto out;
2202 }
2203
2204 bm = (struct spaceBitmapDesc *)bh->b_data;
2205 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2206 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2207 ptr = (uint8_t *)bh->b_data;
1da177e4 2208
cb00ea35 2209 while (bytes > 0) {
01b954a3
MS		 2210 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2211 accum += bitmap_weight((const unsigned long *)(ptr + index),
2212 cur_bytes * 8);
2213 bytes -= cur_bytes;
cb00ea35 2214 if (bytes) {
3bf25cb4 2215 brelse(bh);
97e961fd 2216 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2217 bh = udf_tread(sb, newblock);
cb00ea35 2218 if (!bh) {
1da177e4
LT		 2219 udf_debug("read failed\n");
2220 goto out;
2221 }
2222 index = 0;
28de7948 2223 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2224 }
2225 }
3bf25cb4 2226 brelse(bh);
1da177e4 2227
28de7948 2228out:
1da177e4
LT		 2229 unlock_kernel();
2230
2231 return accum;
2232}
2233
4b11111a
MS		 2234static unsigned int udf_count_free_table(struct super_block *sb,
2235 struct inode *table)
1da177e4
LT		 2236{
2237 unsigned int accum = 0;
ff116fc8 2238 uint32_t elen;
5ca4e4be 2239 struct kernel_lb_addr eloc;
1da177e4 2240 int8_t etype;
ff116fc8 2241 struct extent_position epos;
1da177e4
LT		 2242
2243 lock_kernel();
2244
c0b34438 2245 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2246 epos.offset = sizeof(struct unallocSpaceEntry);
2247 epos.bh = NULL;
1da177e4 2248
3a71fc5d 2249 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2250 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2251
3bf25cb4 2252 brelse(epos.bh);
1da177e4
LT		 2253
2254 unlock_kernel();
2255
2256 return accum;
2257}
cb00ea35
CG		 2258
2259static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2260{
2261 unsigned int accum = 0;
6c79e987
MS		 2262 struct udf_sb_info *sbi;
2263 struct udf_part_map *map;
1da177e4 2264
6c79e987
MS		 2265 sbi = UDF_SB(sb);
2266 if (sbi->s_lvid_bh) {
4b11111a
MS		 2267 struct logicalVolIntegrityDesc *lvid =
2268 (struct logicalVolIntegrityDesc *)
2269 sbi->s_lvid_bh->b_data;
6c79e987 2270 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2271 accum = le32_to_cpu(
2272 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2273 if (accum == 0xFFFFFFFF)
2274 accum = 0;
2275 }
2276 }
2277
2278 if (accum)
2279 return accum;
2280
6c79e987
MS		 2281 map = &sbi->s_partmaps[sbi->s_partition];
2282 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2283 accum += udf_count_free_bitmap(sb,
6c79e987 2284 map->s_uspace.s_bitmap);
1da177e4 2285 }
6c79e987 2286 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2287 accum += udf_count_free_bitmap(sb,
6c79e987 2288 map->s_fspace.s_bitmap);
1da177e4
LT		 2289 }
2290 if (accum)
2291 return accum;
2292
6c79e987 2293 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2294 accum += udf_count_free_table(sb,
6c79e987 2295 map->s_uspace.s_table);
1da177e4 2296 }
6c79e987 2297 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2298 accum += udf_count_free_table(sb,
6c79e987 2299 map->s_fspace.s_table);
1da177e4
LT		 2300 }
2301
2302 return accum;
2303}
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