projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Ext3: return ENOMEM rather than EIO if sb_getblk fails
[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
LT		 120};
121
cb00ea35 122static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 123
124static struct inode *udf_alloc_inode(struct super_block *sb)
125{
126 struct udf_inode_info *ei;
3a71fc5d 127 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 128 if (!ei)
129 return NULL;
95f8797f
DB		 130
131 ei->i_unique = 0;
132 ei->i_lenExtents = 0;
133 ei->i_next_alloc_block = 0;
134 ei->i_next_alloc_goal = 0;
135 ei->i_strat4096 = 0;
4d0fb621 136 init_rwsem(&ei->i_data_sem);
95f8797f 137
1da177e4
LT		 138 return &ei->vfs_inode;
139}
140
fa0d7e3d 141static void udf_i_callback(struct rcu_head *head)
1da177e4 142{
fa0d7e3d 143 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 144 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
145}
146
fa0d7e3d
NP		 147static void udf_destroy_inode(struct inode *inode)
148{
149 call_rcu(&inode->i_rcu, udf_i_callback);
150}
151
51cc5068 152static void init_once(void *foo)
1da177e4 153{
cb00ea35 154 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 155
a35afb83
CL		 156 ei->i_ext.i_data = NULL;
157 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 158}
159
160static int init_inodecache(void)
161{
162 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
163 sizeof(struct udf_inode_info),
cb00ea35
CG		 164 0, (SLAB_RECLAIM_ACCOUNT |
165 SLAB_MEM_SPREAD),
20c2df83 166 init_once);
28de7948 167 if (!udf_inode_cachep)
1da177e4
LT		 168 return -ENOMEM;
169 return 0;
170}
171
172static void destroy_inodecache(void)
173{
8c0a8537
KS		 174 /*
175 * Make sure all delayed rcu free inodes are flushed before we
176 * destroy cache.
177 */
178 rcu_barrier();
1a1d92c1 179 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 180}
181
182/* Superblock operations */
ee9b6d61 183static const struct super_operations udf_sb_ops = {
28de7948
CG		 184 .alloc_inode = udf_alloc_inode,
185 .destroy_inode = udf_destroy_inode,
186 .write_inode = udf_write_inode,
3aac2b62 187 .evict_inode = udf_evict_inode,
28de7948 188 .put_super = udf_put_super,
146bca72 189 .sync_fs = udf_sync_fs,
28de7948
CG		 190 .statfs = udf_statfs,
191 .remount_fs = udf_remount_fs,
6da80894 192 .show_options = udf_show_options,
1da177e4
LT		 193};
194
cb00ea35 195struct udf_options {
1da177e4
LT		 196 unsigned char novrs;
197 unsigned int blocksize;
198 unsigned int session;
199 unsigned int lastblock;
200 unsigned int anchor;
201 unsigned int volume;
202 unsigned short partition;
203 unsigned int fileset;
204 unsigned int rootdir;
205 unsigned int flags;
faa17292 206 umode_t umask;
c2ba138a
EB		 207 kgid_t gid;
208 kuid_t uid;
faa17292
AV		 209 umode_t fmode;
210 umode_t dmode;
1da177e4
LT		 211 struct nls_table *nls_map;
212};
213
214static int __init init_udf_fs(void)
215{
216 int err;
28de7948 217
1da177e4
LT		 218 err = init_inodecache();
219 if (err)
220 goto out1;
221 err = register_filesystem(&udf_fstype);
222 if (err)
223 goto out;
28de7948 224
1da177e4 225 return 0;
28de7948
CG		 226
227out:
1da177e4 228 destroy_inodecache();
28de7948
CG		 229
230out1:
1da177e4
LT		 231 return err;
232}
233
234static void __exit exit_udf_fs(void)
235{
236 unregister_filesystem(&udf_fstype);
237 destroy_inodecache();
238}
239
240module_init(init_udf_fs)
28de7948 241module_exit(exit_udf_fs)
1da177e4 242
dc5d39be
MS		 243static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
244{
245 struct udf_sb_info *sbi = UDF_SB(sb);
246
247 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
248 GFP_KERNEL);
249 if (!sbi->s_partmaps) {
8076c363
JP		 250 udf_err(sb, "Unable to allocate space for %d partition maps\n",
251 count);
dc5d39be
MS		 252 sbi->s_partitions = 0;
253 return -ENOMEM;
254 }
255
256 sbi->s_partitions = count;
257 return 0;
258}
259
bff943af
JK		 260static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
261{
262 int i;
263 int nr_groups = bitmap->s_nr_groups;
264 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
265 nr_groups);
266
267 for (i = 0; i < nr_groups; i++)
268 if (bitmap->s_block_bitmap[i])
269 brelse(bitmap->s_block_bitmap[i]);
270
271 if (size <= PAGE_SIZE)
272 kfree(bitmap);
273 else
274 vfree(bitmap);
275}
276
277static void udf_free_partition(struct udf_part_map *map)
278{
279 int i;
280 struct udf_meta_data *mdata;
281
282 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
283 iput(map->s_uspace.s_table);
284 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
285 iput(map->s_fspace.s_table);
286 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
287 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
288 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
289 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
290 if (map->s_partition_type == UDF_SPARABLE_MAP15)
291 for (i = 0; i < 4; i++)
292 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
293 else if (map->s_partition_type == UDF_METADATA_MAP25) {
294 mdata = &map->s_type_specific.s_metadata;
295 iput(mdata->s_metadata_fe);
296 mdata->s_metadata_fe = NULL;
297
298 iput(mdata->s_mirror_fe);
299 mdata->s_mirror_fe = NULL;
300
301 iput(mdata->s_bitmap_fe);
302 mdata->s_bitmap_fe = NULL;
303 }
304}
305
306static void udf_sb_free_partitions(struct super_block *sb)
307{
308 struct udf_sb_info *sbi = UDF_SB(sb);
309 int i;
1b1baff6
NJ		 310 if (sbi->s_partmaps == NULL)
311 return;
bff943af
JK		 312 for (i = 0; i < sbi->s_partitions; i++)
313 udf_free_partition(&sbi->s_partmaps[i]);
314 kfree(sbi->s_partmaps);
315 sbi->s_partmaps = NULL;
316}
317
34c80b1d 318static int udf_show_options(struct seq_file *seq, struct dentry *root)
6da80894 319{
34c80b1d 320 struct super_block *sb = root->d_sb;
6da80894
MS		 321 struct udf_sb_info *sbi = UDF_SB(sb);
322
323 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
324 seq_puts(seq, ",nostrict");
1197e4df 325 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 326 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
327 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
328 seq_puts(seq, ",unhide");
329 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
330 seq_puts(seq, ",undelete");
331 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
332 seq_puts(seq, ",noadinicb");
333 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
334 seq_puts(seq, ",shortad");
335 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
336 seq_puts(seq, ",uid=forget");
337 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
338 seq_puts(seq, ",uid=ignore");
339 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
340 seq_puts(seq, ",gid=forget");
341 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
342 seq_puts(seq, ",gid=ignore");
343 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
c2ba138a 344 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
6da80894 345 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
c2ba138a 346 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
6da80894 347 if (sbi->s_umask != 0)
faa17292 348 seq_printf(seq, ",umask=%ho", sbi->s_umask);
87bc730c 349 if (sbi->s_fmode != UDF_INVALID_MODE)
faa17292 350 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
87bc730c 351 if (sbi->s_dmode != UDF_INVALID_MODE)
faa17292 352 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
6da80894
MS		 353 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
354 seq_printf(seq, ",session=%u", sbi->s_session);
355 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
356 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 357 if (sbi->s_anchor != 0)
358 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 359 /*
360 * volume, partition, fileset and rootdir seem to be ignored
361 * currently
362 */
363 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
364 seq_puts(seq, ",utf8");
365 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
366 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
367
368 return 0;
369}
370
1da177e4
LT		 371/*
372 * udf_parse_options
373 *
374 * PURPOSE
375 * Parse mount options.
376 *
377 * DESCRIPTION
378 * The following mount options are supported:
379 *
380 * gid= Set the default group.
381 * umask= Set the default umask.
7ac9bcd5
MS		 382 * mode= Set the default file permissions.
383 * dmode= Set the default directory permissions.
1da177e4
LT		 384 * uid= Set the default user.
385 * bs= Set the block size.
386 * unhide Show otherwise hidden files.
387 * undelete Show deleted files in lists.
388 * adinicb Embed data in the inode (default)
389 * noadinicb Don't embed data in the inode
390 * shortad Use short ad's
391 * longad Use long ad's (default)
392 * nostrict Unset strict conformance
393 * iocharset= Set the NLS character set
394 *
395 * The remaining are for debugging and disaster recovery:
396 *
28de7948 397 * novrs Skip volume sequence recognition
1da177e4
LT		 398 *
399 * The following expect a offset from 0.
400 *
401 * session= Set the CDROM session (default= last session)
402 * anchor= Override standard anchor location. (default= 256)
403 * volume= Override the VolumeDesc location. (unused)
404 * partition= Override the PartitionDesc location. (unused)
405 * lastblock= Set the last block of the filesystem/
406 *
407 * The following expect a offset from the partition root.
408 *
409 * fileset= Override the fileset block location. (unused)
410 * rootdir= Override the root directory location. (unused)
411 * WARNING: overriding the rootdir to a non-directory may
412 * yield highly unpredictable results.
413 *
414 * PRE-CONDITIONS
415 * options Pointer to mount options string.
416 * uopts Pointer to mount options variable.
417 *
418 * POST-CONDITIONS
419 * <return> 1 Mount options parsed okay.
420 * <return> 0 Error parsing mount options.
421 *
422 * HISTORY
423 * July 1, 1997 - Andrew E. Mileski
424 * Written, tested, and released.
425 */
28de7948 426
1da177e4
LT		 427enum {
428 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
429 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
430 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
431 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
432 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 433 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
434 Opt_fmode, Opt_dmode
1da177e4
LT		 435};
436
a447c093 437static const match_table_t tokens = {
28de7948
CG		 438 {Opt_novrs, "novrs"},
439 {Opt_nostrict, "nostrict"},
440 {Opt_bs, "bs=%u"},
441 {Opt_unhide, "unhide"},
442 {Opt_undelete, "undelete"},
443 {Opt_noadinicb, "noadinicb"},
444 {Opt_adinicb, "adinicb"},
445 {Opt_shortad, "shortad"},
446 {Opt_longad, "longad"},
447 {Opt_uforget, "uid=forget"},
448 {Opt_uignore, "uid=ignore"},
449 {Opt_gforget, "gid=forget"},
450 {Opt_gignore, "gid=ignore"},
451 {Opt_gid, "gid=%u"},
452 {Opt_uid, "uid=%u"},
453 {Opt_umask, "umask=%o"},
454 {Opt_session, "session=%u"},
455 {Opt_lastblock, "lastblock=%u"},
456 {Opt_anchor, "anchor=%u"},
457 {Opt_volume, "volume=%u"},
458 {Opt_partition, "partition=%u"},
459 {Opt_fileset, "fileset=%u"},
460 {Opt_rootdir, "rootdir=%u"},
461 {Opt_utf8, "utf8"},
462 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 463 {Opt_fmode, "mode=%o"},
464 {Opt_dmode, "dmode=%o"},
28de7948 465 {Opt_err, NULL}
1da177e4
LT		 466};
467
6da80894
MS		 468static int udf_parse_options(char *options, struct udf_options *uopt,
469 bool remount)
1da177e4
LT		 470{
471 char *p;
472 int option;
473
474 uopt->novrs = 0;
1da177e4
LT		 475 uopt->partition = 0xFFFF;
476 uopt->session = 0xFFFFFFFF;
477 uopt->lastblock = 0;
478 uopt->anchor = 0;
479 uopt->volume = 0xFFFFFFFF;
480 uopt->rootdir = 0xFFFFFFFF;
481 uopt->fileset = 0xFFFFFFFF;
482 uopt->nls_map = NULL;
483
484 if (!options)
485 return 1;
486
cb00ea35 487 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 488 substring_t args[MAX_OPT_ARGS];
489 int token;
490 if (!*p)
491 continue;
492
493 token = match_token(p, tokens, args);
cb00ea35
CG		 494 switch (token) {
495 case Opt_novrs:
496 uopt->novrs = 1;
4136801a 497 break;
cb00ea35
CG		 498 case Opt_bs:
499 if (match_int(&args[0], &option))
500 return 0;
501 uopt->blocksize = option;
1197e4df 502 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 503 break;
504 case Opt_unhide:
505 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
506 break;
507 case Opt_undelete:
508 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
509 break;
510 case Opt_noadinicb:
511 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
512 break;
513 case Opt_adinicb:
514 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
515 break;
516 case Opt_shortad:
517 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
518 break;
519 case Opt_longad:
520 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
521 break;
522 case Opt_gid:
523 if (match_int(args, &option))
524 return 0;
c2ba138a
EB		 525 uopt->gid = make_kgid(current_user_ns(), option);
526 if (!gid_valid(uopt->gid))
527 return 0;
ca76d2d8 528 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 529 break;
530 case Opt_uid:
531 if (match_int(args, &option))
532 return 0;
c2ba138a
EB		 533 uopt->uid = make_kuid(current_user_ns(), option);
534 if (!uid_valid(uopt->uid))
535 return 0;
ca76d2d8 536 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 537 break;
538 case Opt_umask:
539 if (match_octal(args, &option))
540 return 0;
541 uopt->umask = option;
542 break;
543 case Opt_nostrict:
544 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
545 break;
546 case Opt_session:
547 if (match_int(args, &option))
548 return 0;
549 uopt->session = option;
6da80894
MS		 550 if (!remount)
551 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 552 break;
553 case Opt_lastblock:
554 if (match_int(args, &option))
555 return 0;
556 uopt->lastblock = option;
6da80894
MS		 557 if (!remount)
558 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 559 break;
560 case Opt_anchor:
561 if (match_int(args, &option))
562 return 0;
563 uopt->anchor = option;
564 break;
565 case Opt_volume:
566 if (match_int(args, &option))
567 return 0;
568 uopt->volume = option;
569 break;
570 case Opt_partition:
571 if (match_int(args, &option))
572 return 0;
573 uopt->partition = option;
574 break;
575 case Opt_fileset:
576 if (match_int(args, &option))
577 return 0;
578 uopt->fileset = option;
579 break;
580 case Opt_rootdir:
581 if (match_int(args, &option))
582 return 0;
583 uopt->rootdir = option;
584 break;
585 case Opt_utf8:
586 uopt->flags |= (1 << UDF_FLAG_UTF8);
587 break;
1da177e4 588#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 589 case Opt_iocharset:
590 uopt->nls_map = load_nls(args[0].from);
591 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
592 break;
1da177e4 593#endif
cb00ea35
CG		 594 case Opt_uignore:
595 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
596 break;
597 case Opt_uforget:
598 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
599 break;
600 case Opt_gignore:
601 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
602 break;
603 case Opt_gforget:
604 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
605 break;
7ac9bcd5
MS		 606 case Opt_fmode:
607 if (match_octal(args, &option))
608 return 0;
609 uopt->fmode = option & 0777;
610 break;
611 case Opt_dmode:
612 if (match_octal(args, &option))
613 return 0;
614 uopt->dmode = option & 0777;
615 break;
cb00ea35 616 default:
78ace70c 617 pr_err("bad mount option \"%s\" or missing value\n", p);
1da177e4
LT		 618 return 0;
619 }
620 }
621 return 1;
622}
623
cb00ea35 624static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 625{
626 struct udf_options uopt;
6c79e987 627 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 628 int error = 0;
1da177e4 629
6c79e987
MS		 630 uopt.flags = sbi->s_flags;
631 uopt.uid = sbi->s_uid;
632 uopt.gid = sbi->s_gid;
633 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 634 uopt.fmode = sbi->s_fmode;
635 uopt.dmode = sbi->s_dmode;
1da177e4 636
6da80894 637 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 638 return -EINVAL;
639
c03cad24 640 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 641 sbi->s_flags = uopt.flags;
642 sbi->s_uid = uopt.uid;
643 sbi->s_gid = uopt.gid;
644 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 645 sbi->s_fmode = uopt.fmode;
646 sbi->s_dmode = uopt.dmode;
c03cad24 647 write_unlock(&sbi->s_cred_lock);
1da177e4 648
6c79e987
MS		 649 if (sbi->s_lvid_bh) {
650 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
1da177e4
LT		 651 if (write_rev > UDF_MAX_WRITE_VERSION)
652 *flags |= MS_RDONLY;
653 }
654
c79d967d
CH		 655 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
656 goto out_unlock;
657
36350462 658 if (*flags & MS_RDONLY)
1da177e4 659 udf_close_lvid(sb);
36350462 660 else
1da177e4
LT		 661 udf_open_lvid(sb);
662
c79d967d 663out_unlock:
c79d967d 664 return error;
1da177e4
LT		 665}
666
40346005
JK		 667/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
668/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
669static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 670{
671 struct volStructDesc *vsd = NULL;
f4bcbbd9 672 loff_t sector = 32768;
1da177e4
LT		 673 int sectorsize;
674 struct buffer_head *bh = NULL;
cb00ea35
CG		 675 int nsr02 = 0;
676 int nsr03 = 0;
6c79e987 677 struct udf_sb_info *sbi;
1da177e4 678
6c79e987 679 sbi = UDF_SB(sb);
1da177e4
LT		 680 if (sb->s_blocksize < sizeof(struct volStructDesc))
681 sectorsize = sizeof(struct volStructDesc);
682 else
683 sectorsize = sb->s_blocksize;
684
6c79e987 685 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 686
687 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 688 (unsigned int)(sector >> sb->s_blocksize_bits),
689 sb->s_blocksize);
1da177e4 690 /* Process the sequence (if applicable) */
cb00ea35 691 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 692 /* Read a block */
693 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
694 if (!bh)
695 break;
696
697 /* Look for ISO descriptors */
698 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 699 (sector & (sb->s_blocksize - 1)));
1da177e4 700
cb00ea35 701 if (vsd->stdIdent[0] == 0) {
3bf25cb4 702 brelse(bh);
1da177e4 703 break;
3a71fc5d
MS		 704 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
705 VSD_STD_ID_LEN)) {
cb00ea35
CG		 706 switch (vsd->structType) {
707 case 0:
708 udf_debug("ISO9660 Boot Record found\n");
709 break;
710 case 1:
a983f368 711 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 712 break;
713 case 2:
a983f368 714 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 715 break;
716 case 3:
a983f368 717 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 718 break;
719 case 255:
a983f368 720 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 721 break;
722 default:
723 udf_debug("ISO9660 VRS (%u) found\n",
724 vsd->structType);
725 break;
1da177e4 726 }
3a71fc5d
MS		 727 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
728 VSD_STD_ID_LEN))
729 ; /* nothing */
730 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
731 VSD_STD_ID_LEN)) {
3bf25cb4 732 brelse(bh);
1da177e4 733 break;
3a71fc5d
MS		 734 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
735 VSD_STD_ID_LEN))
1da177e4 736 nsr02 = sector;
3a71fc5d
MS		 737 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
738 VSD_STD_ID_LEN))
1da177e4 739 nsr03 = sector;
3bf25cb4 740 brelse(bh);
1da177e4
LT		 741 }
742
743 if (nsr03)
744 return nsr03;
745 else if (nsr02)
746 return nsr02;
6c79e987 747 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 748 return -1;
749 else
750 return 0;
751}
752
3a71fc5d 753static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 754 struct kernel_lb_addr *fileset,
755 struct kernel_lb_addr *root)
1da177e4
LT		 756{
757 struct buffer_head *bh = NULL;
758 long lastblock;
759 uint16_t ident;
6c79e987 760 struct udf_sb_info *sbi;
1da177e4
LT		 761
762 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 763 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 764 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 765
28de7948 766 if (!bh) {
1da177e4 767 return 1;
28de7948 768 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 769 brelse(bh);
1da177e4
LT		 770 return 1;
771 }
cb00ea35 772
1da177e4
LT		 773 }
774
6c79e987 775 sbi = UDF_SB(sb);
3a71fc5d
MS		 776 if (!bh) {
777 /* Search backwards through the partitions */
5ca4e4be 778 struct kernel_lb_addr newfileset;
1da177e4 779
28de7948 780/* --> cvg: FIXME - is it reasonable? */
1da177e4 781 return 1;
cb00ea35 782
6c79e987 783 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 784 (newfileset.partitionReferenceNum != 0xFFFF &&
785 fileset->logicalBlockNum == 0xFFFFFFFF &&
786 fileset->partitionReferenceNum == 0xFFFF);
787 newfileset.partitionReferenceNum--) {
6c79e987
MS		 788 lastblock = sbi->s_partmaps
789 [newfileset.partitionReferenceNum]
790 .s_partition_len;
1da177e4
LT		 791 newfileset.logicalBlockNum = 0;
792
cb00ea35 793 do {
97e961fd 794 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 795 &ident);
cb00ea35
CG		 796 if (!bh) {
797 newfileset.logicalBlockNum++;
1da177e4
LT		 798 continue;
799 }
800
cb00ea35
CG		 801 switch (ident) {
802 case TAG_IDENT_SBD:
28de7948
CG		 803 {
804 struct spaceBitmapDesc *sp;
4b11111a
MS		 805 sp = (struct spaceBitmapDesc *)
806 bh->b_data;
28de7948
CG		 807 newfileset.logicalBlockNum += 1 +
808 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 809 sizeof(struct spaceBitmapDesc)
810 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 811 brelse(bh);
812 break;
813 }
cb00ea35 814 case TAG_IDENT_FSD:
28de7948
CG		 815 *fileset = newfileset;
816 break;
cb00ea35 817 default:
28de7948
CG		 818 newfileset.logicalBlockNum++;
819 brelse(bh);
820 bh = NULL;
821 break;
1da177e4 822 }
28de7948
CG		 823 } while (newfileset.logicalBlockNum < lastblock &&
824 fileset->logicalBlockNum == 0xFFFFFFFF &&
825 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 826 }
827 }
828
829 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 830 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 831 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 832 fileset->logicalBlockNum,
833 fileset->partitionReferenceNum);
1da177e4 834
6c79e987 835 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 836 udf_load_fileset(sb, bh, root);
3bf25cb4 837 brelse(bh);
1da177e4
LT		 838 return 0;
839 }
840 return 1;
841}
842
c0eb31ed 843static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 844{
845 struct primaryVolDesc *pvoldesc;
ba9aadd8 846 struct ustr *instr, *outstr;
c0eb31ed
JK		 847 struct buffer_head *bh;
848 uint16_t ident;
ba9aadd8
MS		 849 int ret = 1;
850
851 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
852 if (!instr)
853 return 1;
854
855 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
856 if (!outstr)
857 goto out1;
c0eb31ed
JK		 858
859 bh = udf_read_tagged(sb, block, block, &ident);
860 if (!bh)
ba9aadd8
MS		 861 goto out2;
862
c0eb31ed 863 BUG_ON(ident != TAG_IDENT_PVD);
1da177e4
LT		 864
865 pvoldesc = (struct primaryVolDesc *)bh->b_data;
866
56774805
MS		 867 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
868 pvoldesc->recordingDateAndTime)) {
af15a298 869#ifdef UDFFS_DEBUG
5ca4e4be 870 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 871 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 872 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
873 ts->minute, le16_to_cpu(ts->typeAndTimezone));
874#endif
1da177e4
LT		 875 }
876
ba9aadd8
MS		 877 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
878 if (udf_CS0toUTF8(outstr, instr)) {
879 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
880 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a 881 udf_debug("volIdent[] = '%s'\n",
a983f368 882 UDF_SB(sb)->s_volume_ident);
1da177e4 883 }
1da177e4 884
ba9aadd8
MS		 885 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
886 if (udf_CS0toUTF8(outstr, instr))
887 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed
JK		 888
889 brelse(bh);
ba9aadd8
MS		 890 ret = 0;
891out2:
892 kfree(outstr);
893out1:
894 kfree(instr);
895 return ret;
1da177e4
LT		 896}
897
3080a74e
NJ		 898struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
899 u32 meta_file_loc, u32 partition_num)
900{
901 struct kernel_lb_addr addr;
902 struct inode *metadata_fe;
903
904 addr.logicalBlockNum = meta_file_loc;
905 addr.partitionReferenceNum = partition_num;
906
907 metadata_fe = udf_iget(sb, &addr);
908
909 if (metadata_fe == NULL)
910 udf_warn(sb, "metadata inode efe not found\n");
911 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
912 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
913 iput(metadata_fe);
914 metadata_fe = NULL;
915 }
916
917 return metadata_fe;
918}
919
bfb257a5
JK		 920static int udf_load_metadata_files(struct super_block *sb, int partition)
921{
922 struct udf_sb_info *sbi = UDF_SB(sb);
923 struct udf_part_map *map;
924 struct udf_meta_data *mdata;
5ca4e4be 925 struct kernel_lb_addr addr;
bfb257a5
JK		 926
927 map = &sbi->s_partmaps[partition];
928 mdata = &map->s_type_specific.s_metadata;
929
930 /* metadata address */
bfb257a5 931 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 932 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 933
3080a74e
NJ		 934 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
935 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5
JK		 936
937 if (mdata->s_metadata_fe == NULL) {
3080a74e
NJ		 938 /* mirror file entry */
939 udf_debug("Mirror metadata file location: block = %d part = %d\n",
940 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 941
3080a74e
NJ		 942 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
943 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 944
3080a74e
NJ		 945 if (mdata->s_mirror_fe == NULL) {
946 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
bfb257a5 947 goto error_exit;
3080a74e 948 }
bfb257a5
JK		 949 }
950
951 /*
952 * bitmap file entry
953 * Note:
954 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
955 */
956 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
957 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
958 addr.partitionReferenceNum = map->s_partition_num;
959
960 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 961 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 962
97e961fd 963 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 964
965 if (mdata->s_bitmap_fe == NULL) {
966 if (sb->s_flags & MS_RDONLY)
a40ecd7b 967 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 968 else {
8076c363 969 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
bfb257a5
JK		 970 goto error_exit;
971 }
972 }
973 }
974
975 udf_debug("udf_load_metadata_files Ok\n");
976
977 return 0;
978
979error_exit:
980 return 1;
981}
982
28de7948 983static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 984 struct kernel_lb_addr *root)
1da177e4
LT		 985{
986 struct fileSetDesc *fset;
987
988 fset = (struct fileSetDesc *)bh->b_data;
989
990 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
991
6c79e987 992 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 993
cb00ea35
CG		 994 udf_debug("Rootdir at block=%d, partition=%d\n",
995 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 996}
997
883cb9d1
MS		 998int udf_compute_nr_groups(struct super_block *sb, u32 partition)
999{
1000 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1001 return DIV_ROUND_UP(map->s_partition_len +
1002 (sizeof(struct spaceBitmapDesc) << 3),
1003 sb->s_blocksize * 8);
883cb9d1
MS		 1004}
1005
66e1da3f
MS		 1006static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1007{
66e1da3f
MS		 1008 struct udf_bitmap *bitmap;
1009 int nr_groups;
1010 int size;
1011
883cb9d1 1012 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1013 size = sizeof(struct udf_bitmap) +
1014 (sizeof(struct buffer_head *) * nr_groups);
1015
1016 if (size <= PAGE_SIZE)
ed2ae6f6 1017 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1018 else
ed2ae6f6 1019 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1020
75b09e02 1021 if (bitmap == NULL)
66e1da3f 1022 return NULL;
66e1da3f 1023
66e1da3f
MS		 1024 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1025 bitmap->s_nr_groups = nr_groups;
1026 return bitmap;
1027}
1028
3fb38dfa
JK		 1029static int udf_fill_partdesc_info(struct super_block *sb,
1030 struct partitionDesc *p, int p_index)
1da177e4 1031{
6c79e987 1032 struct udf_part_map *map;
165923fa 1033 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1034 struct partitionHeaderDesc *phd;
165923fa 1035
3fb38dfa 1036 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1037
1038 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1039 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1040
1041 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1042 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1043 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1044 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1045 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1046 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1047 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1048 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1049
a983f368
JP		 1050 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1051 p_index, map->s_partition_type,
1052 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1053
1054 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1055 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1056 return 0;
165923fa
MS		 1057
1058 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1059 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1060 struct kernel_lb_addr loc = {
165923fa
MS		 1061 .logicalBlockNum = le32_to_cpu(
1062 phd->unallocSpaceTable.extPosition),
3fb38dfa 1063 .partitionReferenceNum = p_index,
165923fa
MS		 1064 };
1065
97e961fd 1066 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1067 if (!map->s_uspace.s_table) {
1068 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1069 p_index);
3fb38dfa 1070 return 1;
165923fa
MS		 1071 }
1072 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1073 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1074 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1075 }
1076
1077 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1078 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1079 if (!bitmap)
1080 return 1;
165923fa 1081 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1082 bitmap->s_extLength = le32_to_cpu(
165923fa 1083 phd->unallocSpaceBitmap.extLength);
2e0838fd 1084 bitmap->s_extPosition = le32_to_cpu(
165923fa 1085 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1086 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1087 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1088 p_index, bitmap->s_extPosition);
165923fa
MS		 1089 }
1090
1091 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1092 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1093
1094 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1095 struct kernel_lb_addr loc = {
165923fa
MS		 1096 .logicalBlockNum = le32_to_cpu(
1097 phd->freedSpaceTable.extPosition),
3fb38dfa 1098 .partitionReferenceNum = p_index,
165923fa
MS		 1099 };
1100
97e961fd 1101 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1102 if (!map->s_fspace.s_table) {
3fb38dfa 1103 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1104 p_index);
3fb38dfa 1105 return 1;
165923fa
MS		 1106 }
1107
1108 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1109 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1110 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1111 }
1112
1113 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1114 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1115 if (!bitmap)
1116 return 1;
165923fa 1117 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1118 bitmap->s_extLength = le32_to_cpu(
165923fa 1119 phd->freedSpaceBitmap.extLength);
2e0838fd 1120 bitmap->s_extPosition = le32_to_cpu(
165923fa 1121 phd->freedSpaceBitmap.extPosition);
2e0838fd 1122 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1123 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1124 p_index, bitmap->s_extPosition);
165923fa 1125 }
3fb38dfa
JK		 1126 return 0;
1127}
1128
e971b0b9
JK		 1129static void udf_find_vat_block(struct super_block *sb, int p_index,
1130 int type1_index, sector_t start_block)
38b74a53
JK		 1131{
1132 struct udf_sb_info *sbi = UDF_SB(sb);
1133 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1134 sector_t vat_block;
5ca4e4be 1135 struct kernel_lb_addr ino;
e971b0b9
JK		 1136
1137 /*
1138 * VAT file entry is in the last recorded block. Some broken disks have
1139 * it a few blocks before so try a bit harder...
1140 */
1141 ino.partitionReferenceNum = type1_index;
1142 for (vat_block = start_block;
1143 vat_block >= map->s_partition_root &&
1144 vat_block >= start_block - 3 &&
1145 !sbi->s_vat_inode; vat_block--) {
1146 ino.logicalBlockNum = vat_block - map->s_partition_root;
1147 sbi->s_vat_inode = udf_iget(sb, &ino);
1148 }
1149}
1150
1151static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1152{
1153 struct udf_sb_info *sbi = UDF_SB(sb);
1154 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1155 struct buffer_head *bh = NULL;
1156 struct udf_inode_info *vati;
1157 uint32_t pos;
1158 struct virtualAllocationTable20 *vat20;
4bf17af0 1159 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1160
e971b0b9 1161 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1162 if (!sbi->s_vat_inode &&
1163 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1164 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1165 (unsigned long)sbi->s_last_block,
1166 (unsigned long)blocks - 1);
e971b0b9 1167 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1168 }
38b74a53
JK		 1169 if (!sbi->s_vat_inode)
1170 return 1;
1171
1172 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1173 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1174 map->s_type_specific.s_virtual.s_num_entries =
1175 (sbi->s_vat_inode->i_size - 36) >> 2;
1176 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1177 vati = UDF_I(sbi->s_vat_inode);
1178 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1179 pos = udf_block_map(sbi->s_vat_inode, 0);
1180 bh = sb_bread(sb, pos);
1181 if (!bh)
1182 return 1;
1183 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1184 } else {
1185 vat20 = (struct virtualAllocationTable20 *)
1186 vati->i_ext.i_data;
1187 }
38b74a53 1188
38b74a53 1189 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1190 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1191 map->s_type_specific.s_virtual.s_num_entries =
1192 (sbi->s_vat_inode->i_size -
1193 map->s_type_specific.s_virtual.
1194 s_start_offset) >> 2;
1195 brelse(bh);
1196 }
1197 return 0;
1198}
1199
3fb38dfa
JK		 1200static int udf_load_partdesc(struct super_block *sb, sector_t block)
1201{
1202 struct buffer_head *bh;
1203 struct partitionDesc *p;
1204 struct udf_part_map *map;
1205 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1206 int i, type1_idx;
3fb38dfa
JK		 1207 uint16_t partitionNumber;
1208 uint16_t ident;
1209 int ret = 0;
1210
1211 bh = udf_read_tagged(sb, block, block, &ident);
1212 if (!bh)
1213 return 1;
1214 if (ident != TAG_IDENT_PD)
1215 goto out_bh;
1216
1217 p = (struct partitionDesc *)bh->b_data;
1218 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1219
bfb257a5 1220 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1221 for (i = 0; i < sbi->s_partitions; i++) {
1222 map = &sbi->s_partmaps[i];
1223 udf_debug("Searching map: (%d == %d)\n",
1224 map->s_partition_num, partitionNumber);
38b74a53
JK		 1225 if (map->s_partition_num == partitionNumber &&
1226 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1227 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1228 break;
1229 }
1230
38b74a53 1231 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1232 udf_debug("Partition (%d) not found in partition map\n",
1233 partitionNumber);
1234 goto out_bh;
1235 }
165923fa 1236
3fb38dfa 1237 ret = udf_fill_partdesc_info(sb, p, i);
38b74a53
JK		 1238
1239 /*
bfb257a5
JK		 1240 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1241 * PHYSICAL partitions are already set up
38b74a53
JK		 1242 */
1243 type1_idx = i;
1244 for (i = 0; i < sbi->s_partitions; i++) {
1245 map = &sbi->s_partmaps[i];
1246
1247 if (map->s_partition_num == partitionNumber &&
1248 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1249 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1250 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1251 break;
1252 }
1253
1254 if (i >= sbi->s_partitions)
1255 goto out_bh;
1256
1257 ret = udf_fill_partdesc_info(sb, p, i);
1258 if (ret)
1259 goto out_bh;
1260
bfb257a5
JK		 1261 if (map->s_partition_type == UDF_METADATA_MAP25) {
1262 ret = udf_load_metadata_files(sb, i);
1263 if (ret) {
78ace70c
JP		 1264 udf_err(sb, "error loading MetaData partition map %d\n",
1265 i);
bfb257a5
JK		 1266 goto out_bh;
1267 }
1268 } else {
1269 ret = udf_load_vat(sb, i, type1_idx);
1270 if (ret)
1271 goto out_bh;
1272 /*
1273 * Mark filesystem read-only if we have a partition with
1274 * virtual map since we don't handle writing to it (we
1275 * overwrite blocks instead of relocating them).
1276 */
1277 sb->s_flags |= MS_RDONLY;
78ace70c 1278 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
bfb257a5 1279 }
c0eb31ed 1280out_bh:
2e0838fd 1281 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1282 brelse(bh);
1283 return ret;
1da177e4
LT		 1284}
1285
1df2ae31
JK		 1286static int udf_load_sparable_map(struct super_block *sb,
1287 struct udf_part_map *map,
1288 struct sparablePartitionMap *spm)
1289{
1290 uint32_t loc;
1291 uint16_t ident;
1292 struct sparingTable *st;
1293 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1294 int i;
1295 struct buffer_head *bh;
1296
1297 map->s_partition_type = UDF_SPARABLE_MAP15;
1298 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1299 if (!is_power_of_2(sdata->s_packet_len)) {
1300 udf_err(sb, "error loading logical volume descriptor: "
1301 "Invalid packet length %u\n",
1302 (unsigned)sdata->s_packet_len);
1303 return -EIO;
1304 }
1305 if (spm->numSparingTables > 4) {
1306 udf_err(sb, "error loading logical volume descriptor: "
1307 "Too many sparing tables (%d)\n",
1308 (int)spm->numSparingTables);
1309 return -EIO;
1310 }
1311
1312 for (i = 0; i < spm->numSparingTables; i++) {
1313 loc = le32_to_cpu(spm->locSparingTable[i]);
1314 bh = udf_read_tagged(sb, loc, loc, &ident);
1315 if (!bh)
1316 continue;
1317
1318 st = (struct sparingTable *)bh->b_data;
1319 if (ident != 0 ||
1320 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1321 strlen(UDF_ID_SPARING)) ||
1322 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1323 sb->s_blocksize) {
1324 brelse(bh);
1325 continue;
1326 }
1327
1328 sdata->s_spar_map[i] = bh;
1329 }
1330 map->s_partition_func = udf_get_pblock_spar15;
1331 return 0;
1332}
1333
c0eb31ed 1334static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1335 struct kernel_lb_addr *fileset)
1da177e4
LT		 1336{
1337 struct logicalVolDesc *lvd;
1df2ae31 1338 int i, offset;
1da177e4 1339 uint8_t type;
6c79e987 1340 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1341 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1342 uint16_t ident;
1343 struct buffer_head *bh;
adee11b2 1344 unsigned int table_len;
c0eb31ed 1345 int ret = 0;
1da177e4 1346
c0eb31ed
JK		 1347 bh = udf_read_tagged(sb, block, block, &ident);
1348 if (!bh)
1349 return 1;
1350 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1351 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1352 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1353 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1354 udf_err(sb, "error loading logical volume descriptor: "
1355 "Partition table too long (%u > %lu)\n", table_len,
1356 sb->s_blocksize - sizeof(*lvd));
68766a2e 1357 ret = 1;
adee11b2
JK		 1358 goto out_bh;
1359 }
1da177e4 1360
cb14d340
JK		 1361 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1362 if (ret)
c0eb31ed 1363 goto out_bh;
1da177e4 1364
cb00ea35 1365 for (i = 0, offset = 0;
adee11b2 1366 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1367 i++, offset += gpm->partitionMapLength) {
1368 struct udf_part_map *map = &sbi->s_partmaps[i];
1369 gpm = (struct genericPartitionMap *)
1370 &(lvd->partitionMaps[offset]);
1371 type = gpm->partitionMapType;
cb00ea35 1372 if (type == 1) {
4b11111a
MS		 1373 struct genericPartitionMap1 *gpm1 =
1374 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1375 map->s_partition_type = UDF_TYPE1_MAP15;
1376 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1377 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1378 map->s_partition_func = NULL;
cb00ea35 1379 } else if (type == 2) {
4b11111a
MS		 1380 struct udfPartitionMap2 *upm2 =
1381 (struct udfPartitionMap2 *)gpm;
1382 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1383 strlen(UDF_ID_VIRTUAL))) {
1384 u16 suf =
1385 le16_to_cpu(((__le16 *)upm2->partIdent.
1386 identSuffix)[0]);
c82a1275 1387 if (suf < 0x0200) {
4b11111a
MS		 1388 map->s_partition_type =
1389 UDF_VIRTUAL_MAP15;
1390 map->s_partition_func =
1391 udf_get_pblock_virt15;
c82a1275 1392 } else {
4b11111a
MS		 1393 map->s_partition_type =
1394 UDF_VIRTUAL_MAP20;
1395 map->s_partition_func =
1396 udf_get_pblock_virt20;
1da177e4 1397 }
4b11111a
MS		 1398 } else if (!strncmp(upm2->partIdent.ident,
1399 UDF_ID_SPARABLE,
1400 strlen(UDF_ID_SPARABLE))) {
1df2ae31 1401 if (udf_load_sparable_map(sb, map,
68766a2e
NP		 1402 (struct sparablePartitionMap *)gpm) < 0) {
1403 ret = 1;
1df2ae31 1404 goto out_bh;
68766a2e 1405 }
bfb257a5
JK		 1406 } else if (!strncmp(upm2->partIdent.ident,
1407 UDF_ID_METADATA,
1408 strlen(UDF_ID_METADATA))) {
1409 struct udf_meta_data *mdata =
1410 &map->s_type_specific.s_metadata;
1411 struct metadataPartitionMap *mdm =
1412 (struct metadataPartitionMap *)
1413 &(lvd->partitionMaps[offset]);
a983f368
JP		 1414 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1415 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1416
1417 map->s_partition_type = UDF_METADATA_MAP25;
1418 map->s_partition_func = udf_get_pblock_meta25;
1419
1420 mdata->s_meta_file_loc =
1421 le32_to_cpu(mdm->metadataFileLoc);
1422 mdata->s_mirror_file_loc =
1423 le32_to_cpu(mdm->metadataMirrorFileLoc);
1424 mdata->s_bitmap_file_loc =
1425 le32_to_cpu(mdm->metadataBitmapFileLoc);
1426 mdata->s_alloc_unit_size =
1427 le32_to_cpu(mdm->allocUnitSize);
1428 mdata->s_align_unit_size =
1429 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1430 if (mdm->flags & 0x01)
1431 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1432
1433 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1434 le16_to_cpu(*(__le16 *)
1435 mdm->partIdent.identSuffix));
bfb257a5 1436 udf_debug("Metadata part num=%d\n",
a983f368 1437 le16_to_cpu(mdm->partitionNum));
bfb257a5 1438 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1439 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1440 udf_debug("Metadata file loc=%d\n",
a983f368 1441 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1442 udf_debug("Mirror file loc=%d\n",
a983f368 1443 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1444 udf_debug("Bitmap file loc=%d\n",
a983f368 1445 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1446 udf_debug("Flags: %d %d\n",
1447 mdata->s_flags, mdm->flags);
cb00ea35 1448 } else {
3a71fc5d
MS		 1449 udf_debug("Unknown ident: %s\n",
1450 upm2->partIdent.ident);
1da177e4
LT		 1451 continue;
1452 }
6c79e987
MS		 1453 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1454 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1455 }
1456 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1457 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1458 }
1459
cb00ea35 1460 if (fileset) {
5ca4e4be 1461 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1462
1463 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1464 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1465 fileset->logicalBlockNum,
28de7948 1466 fileset->partitionReferenceNum);
1da177e4
LT		 1467 }
1468 if (lvd->integritySeqExt.extLength)
1469 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
28de7948 1470
c0eb31ed
JK		 1471out_bh:
1472 brelse(bh);
1473 return ret;
1da177e4
LT		 1474}
1475
1476/*
1477 * udf_load_logicalvolint
1478 *
1479 */
5ca4e4be 1480static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1481{
1482 struct buffer_head *bh = NULL;
1483 uint16_t ident;
6c79e987
MS		 1484 struct udf_sb_info *sbi = UDF_SB(sb);
1485 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1486
1487 while (loc.extLength > 0 &&
cb00ea35
CG		 1488 (bh = udf_read_tagged(sb, loc.extLocation,
1489 loc.extLocation, &ident)) &&
1490 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1491 sbi->s_lvid_bh = bh;
1492 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1493
6c79e987 1494 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1495 udf_load_logicalvolint(sb,
6c79e987 1496 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1497
6c79e987 1498 if (sbi->s_lvid_bh != bh)
3bf25cb4 1499 brelse(bh);
1da177e4 1500 loc.extLength -= sb->s_blocksize;
cb00ea35 1501 loc.extLocation++;
1da177e4 1502 }
6c79e987 1503 if (sbi->s_lvid_bh != bh)
3bf25cb4 1504 brelse(bh);
1da177e4
LT		 1505}
1506
1507/*
1508 * udf_process_sequence
1509 *
1510 * PURPOSE
1511 * Process a main/reserve volume descriptor sequence.
1512 *
1513 * PRE-CONDITIONS
1514 * sb Pointer to _locked_ superblock.
1515 * block First block of first extent of the sequence.
1516 * lastblock Lastblock of first extent of the sequence.
1517 *
1518 * HISTORY
1519 * July 1, 1997 - Andrew E. Mileski
1520 * Written, tested, and released.
1521 */
200a3592 1522static noinline int udf_process_sequence(struct super_block *sb, long block,
5ca4e4be 1523 long lastblock, struct kernel_lb_addr *fileset)
1da177e4
LT		 1524{
1525 struct buffer_head *bh = NULL;
1526 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1527 struct udf_vds_record *curr;
1da177e4
LT		 1528 struct generic_desc *gd;
1529 struct volDescPtr *vdp;
cb00ea35 1530 int done = 0;
1da177e4
LT		 1531 uint32_t vdsn;
1532 uint16_t ident;
1533 long next_s = 0, next_e = 0;
1534
1535 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1536
c0eb31ed
JK		 1537 /*
1538 * Read the main descriptor sequence and find which descriptors
1539 * are in it.
1540 */
cb00ea35 1541 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1542
1543 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1544 if (!bh) {
78ace70c
JP		 1545 udf_err(sb,
1546 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1547 (unsigned long long)block);
c0eb31ed
JK		 1548 return 1;
1549 }
1da177e4
LT		 1550
1551 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1552 gd = (struct generic_desc *)bh->b_data;
1553 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1554 switch (ident) {
28de7948 1555 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1556 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1557 if (vdsn >= curr->volDescSeqNum) {
1558 curr->volDescSeqNum = vdsn;
1559 curr->block = block;
cb00ea35
CG		 1560 }
1561 break;
28de7948 1562 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1563 curr = &vds[VDS_POS_VOL_DESC_PTR];
1564 if (vdsn >= curr->volDescSeqNum) {
1565 curr->volDescSeqNum = vdsn;
1566 curr->block = block;
cb00ea35
CG		 1567
1568 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1569 next_s = le32_to_cpu(
1570 vdp->nextVolDescSeqExt.extLocation);
1571 next_e = le32_to_cpu(
1572 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1573 next_e = next_e >> sb->s_blocksize_bits;
1574 next_e += next_s;
1575 }
1576 break;
28de7948 1577 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1578 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1579 if (vdsn >= curr->volDescSeqNum) {
1580 curr->volDescSeqNum = vdsn;
1581 curr->block = block;
cb00ea35
CG		 1582 }
1583 break;
28de7948 1584 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1585 curr = &vds[VDS_POS_PARTITION_DESC];
1586 if (!curr->block)
1587 curr->block = block;
cb00ea35 1588 break;
28de7948 1589 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1590 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1591 if (vdsn >= curr->volDescSeqNum) {
1592 curr->volDescSeqNum = vdsn;
1593 curr->block = block;
cb00ea35
CG		 1594 }
1595 break;
28de7948 1596 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1597 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1598 if (vdsn >= curr->volDescSeqNum) {
1599 curr->volDescSeqNum = vdsn;
1600 curr->block = block;
cb00ea35
CG		 1601 }
1602 break;
28de7948 1603 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1604 vds[VDS_POS_TERMINATING_DESC].block = block;
1605 if (next_e) {
1606 block = next_s;
1607 lastblock = next_e;
1608 next_s = next_e = 0;
4b11111a 1609 } else
cb00ea35
CG		 1610 done = 1;
1611 break;
1da177e4 1612 }
3bf25cb4 1613 brelse(bh);
1da177e4 1614 }
c0eb31ed
JK		 1615 /*
1616 * Now read interesting descriptors again and process them
1617 * in a suitable order
1618 */
1619 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1620 udf_err(sb, "Primary Volume Descriptor not found!\n");
c0eb31ed
JK		 1621 return 1;
1622 }
1623 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1624 return 1;
165923fa 1625
c0eb31ed
JK		 1626 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1627 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1628 return 1;
165923fa 1629
c0eb31ed
JK		 1630 if (vds[VDS_POS_PARTITION_DESC].block) {
1631 /*
1632 * We rescan the whole descriptor sequence to find
1633 * partition descriptor blocks and process them.
1634 */
1635 for (block = vds[VDS_POS_PARTITION_DESC].block;
1636 block < vds[VDS_POS_TERMINATING_DESC].block;
1637 block++)
1638 if (udf_load_partdesc(sb, block))
165923fa 1639 return 1;
1da177e4
LT		 1640 }
1641
1642 return 0;
1643}
1644
40346005
JK		 1645static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1646 struct kernel_lb_addr *fileset)
1da177e4 1647{
40346005
JK		 1648 struct anchorVolDescPtr *anchor;
1649 long main_s, main_e, reserve_s, reserve_e;
1da177e4 1650
40346005
JK		 1651 anchor = (struct anchorVolDescPtr *)bh->b_data;
1652
1653 /* Locate the main sequence */
1654 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1655 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1656 main_e = main_e >> sb->s_blocksize_bits;
1657 main_e += main_s;
1658
1659 /* Locate the reserve sequence */
1660 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1661 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1662 reserve_e = reserve_e >> sb->s_blocksize_bits;
1663 reserve_e += reserve_s;
1664
1665 /* Process the main & reserve sequences */
1666 /* responsible for finding the PartitionDesc(s) */
1667 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1668 return 1;
bff943af
JK		 1669 udf_sb_free_partitions(sb);
1670 if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset))
1671 return 1;
1672 udf_sb_free_partitions(sb);
1673 return 0;
1da177e4
LT		 1674}
1675
40346005
JK		 1676/*
1677 * Check whether there is an anchor block in the given block and
1678 * load Volume Descriptor Sequence if so.
1679 */
1680static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1681 struct kernel_lb_addr *fileset)
1197e4df 1682{
40346005
JK		 1683 struct buffer_head *bh;
1684 uint16_t ident;
1685 int ret;
1197e4df 1686
40346005
JK		 1687 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1688 udf_fixed_to_variable(block) >=
1689 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1197e4df 1690 return 0;
40346005
JK		 1691
1692 bh = udf_read_tagged(sb, block, block, &ident);
1693 if (!bh)
1197e4df 1694 return 0;
40346005
JK		 1695 if (ident != TAG_IDENT_AVDP) {
1696 brelse(bh);
1197e4df
CL		 1697 return 0;
1698 }
40346005
JK		 1699 ret = udf_load_sequence(sb, bh, fileset);
1700 brelse(bh);
1701 return ret;
1197e4df
CL		 1702}
1703
40346005
JK		 1704/* Search for an anchor volume descriptor pointer */
1705static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1706 struct kernel_lb_addr *fileset)
1da177e4 1707{
40346005 1708 sector_t last[6];
38b74a53 1709 int i;
40346005
JK		 1710 struct udf_sb_info *sbi = UDF_SB(sb);
1711 int last_count = 0;
1da177e4 1712
40346005
JK		 1713 /* First try user provided anchor */
1714 if (sbi->s_anchor) {
1715 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1716 return lastblock;
1717 }
1718 /*
1719 * according to spec, anchor is in either:
1720 * block 256
1721 * lastblock-256
1722 * lastblock
1723 * however, if the disc isn't closed, it could be 512.
1724 */
1725 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1726 return lastblock;
1727 /*
1728 * The trouble is which block is the last one. Drives often misreport
1729 * this so we try various possibilities.
1730 */
1731 last[last_count++] = lastblock;
1732 if (lastblock >= 1)
1733 last[last_count++] = lastblock - 1;
1734 last[last_count++] = lastblock + 1;
1735 if (lastblock >= 2)
1736 last[last_count++] = lastblock - 2;
1737 if (lastblock >= 150)
1738 last[last_count++] = lastblock - 150;
1739 if (lastblock >= 152)
1740 last[last_count++] = lastblock - 152;
1da177e4 1741
40346005
JK		 1742 for (i = 0; i < last_count; i++) {
1743 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1744 sb->s_blocksize_bits)
28f7c4d4 1745 continue;
40346005
JK		 1746 if (udf_check_anchor_block(sb, last[i], fileset))
1747 return last[i];
1748 if (last[i] < 256)
28f7c4d4 1749 continue;
40346005
JK		 1750 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1751 return last[i];
1752 }
28f7c4d4 1753
40346005
JK		 1754 /* Finally try block 512 in case media is open */
1755 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1756 return last[0];
1757 return 0;
1758}
28f7c4d4 1759
40346005
JK		 1760/*
1761 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1762 * area specified by it. The function expects sbi->s_lastblock to be the last
1763 * block on the media.
1764 *
1765 * Return 1 if ok, 0 if not found.
1766 *
1767 */
1768static int udf_find_anchor(struct super_block *sb,
1769 struct kernel_lb_addr *fileset)
1770{
1771 sector_t lastblock;
1772 struct udf_sb_info *sbi = UDF_SB(sb);
28f7c4d4 1773
40346005
JK		 1774 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1775 if (lastblock)
1776 goto out;
1da177e4 1777
40346005
JK		 1778 /* No anchor found? Try VARCONV conversion of block numbers */
1779 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1780 /* Firstly, we try to not convert number of the last block */
1781 lastblock = udf_scan_anchors(sb,
1782 udf_variable_to_fixed(sbi->s_last_block),
1783 fileset);
1784 if (lastblock)
1785 goto out;
1da177e4 1786
40346005
JK		 1787 /* Secondly, we try with converted number of the last block */
1788 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1789 if (!lastblock) {
1790 /* VARCONV didn't help. Clear it. */
1791 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1792 return 0;
1da177e4 1793 }
40346005
JK		 1794out:
1795 sbi->s_last_block = lastblock;
1796 return 1;
1797}
1da177e4 1798
40346005
JK		 1799/*
1800 * Check Volume Structure Descriptor, find Anchor block and load Volume
1801 * Descriptor Sequence
1802 */
1803static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1804 int silent, struct kernel_lb_addr *fileset)
1805{
1806 struct udf_sb_info *sbi = UDF_SB(sb);
1807 loff_t nsr_off;
1808
1809 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1810 if (!silent)
78ace70c 1811 udf_warn(sb, "Bad block size\n");
40346005
JK		 1812 return 0;
1813 }
1814 sbi->s_last_block = uopt->lastblock;
1815 if (!uopt->novrs) {
1816 /* Check that it is NSR02 compliant */
1817 nsr_off = udf_check_vsd(sb);
1818 if (!nsr_off) {
1819 if (!silent)
78ace70c 1820 udf_warn(sb, "No VRS found\n");
40346005
JK		 1821 return 0;
1822 }
1823 if (nsr_off == -1)
a983f368 1824 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
40346005
JK		 1825 if (!sbi->s_last_block)
1826 sbi->s_last_block = udf_get_last_block(sb);
1827 } else {
1828 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1829 }
1da177e4 1830
40346005
JK		 1831 /* Look for anchor block and load Volume Descriptor Sequence */
1832 sbi->s_anchor = uopt->anchor;
1833 if (!udf_find_anchor(sb, fileset)) {
1834 if (!silent)
78ace70c 1835 udf_warn(sb, "No anchor found\n");
40346005
JK		 1836 return 0;
1837 }
1838 return 1;
1da177e4
LT		 1839}
1840
1841static void udf_open_lvid(struct super_block *sb)
1842{
6c79e987
MS		 1843 struct udf_sb_info *sbi = UDF_SB(sb);
1844 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1845 struct logicalVolIntegrityDesc *lvid;
1846 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1847
165923fa
MS		 1848 if (!bh)
1849 return;
949f4a7c
JK		 1850
1851 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1852 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1853 lvidiu = udf_sb_lvidiu(sbi);
1854
1855 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1856 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1857 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1858 CURRENT_TIME);
146bca72 1859 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1860
1861 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1862 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1863 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1864
1865 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1866 mark_buffer_dirty(bh);
146bca72 1867 sbi->s_lvid_dirty = 0;
949f4a7c 1868 mutex_unlock(&sbi->s_alloc_mutex);
1da177e4
LT		 1869}
1870
1871static void udf_close_lvid(struct super_block *sb)
1872{
6c79e987
MS		 1873 struct udf_sb_info *sbi = UDF_SB(sb);
1874 struct buffer_head *bh = sbi->s_lvid_bh;
1875 struct logicalVolIntegrityDesc *lvid;
165923fa 1876 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1877
6c79e987
MS		 1878 if (!bh)
1879 return;
1880
949f4a7c 1881 mutex_lock(&sbi->s_alloc_mutex);
6c79e987 1882 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
165923fa
MS		 1883 lvidiu = udf_sb_lvidiu(sbi);
1884 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1885 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1886 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1887 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1888 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1889 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1890 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1891 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1892 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1893 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1894
1895 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1896 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1897 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1898
1899 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 1900 /*
1901 * We set buffer uptodate unconditionally here to avoid spurious
1902 * warnings from mark_buffer_dirty() when previous EIO has marked
1903 * the buffer as !uptodate
1904 */
1905 set_buffer_uptodate(bh);
165923fa 1906 mark_buffer_dirty(bh);
146bca72 1907 sbi->s_lvid_dirty = 0;
949f4a7c 1908 mutex_unlock(&sbi->s_alloc_mutex);
1da177e4
LT		 1909}
1910
d664b6af
JK		 1911u64 lvid_get_unique_id(struct super_block *sb)
1912{
1913 struct buffer_head *bh;
1914 struct udf_sb_info *sbi = UDF_SB(sb);
1915 struct logicalVolIntegrityDesc *lvid;
1916 struct logicalVolHeaderDesc *lvhd;
1917 u64 uniqueID;
1918 u64 ret;
1919
1920 bh = sbi->s_lvid_bh;
1921 if (!bh)
1922 return 0;
1923
1924 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1925 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1926
1927 mutex_lock(&sbi->s_alloc_mutex);
1928 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1929 if (!(++uniqueID & 0xFFFFFFFF))
1930 uniqueID += 16;
1931 lvhd->uniqueID = cpu_to_le64(uniqueID);
1932 mutex_unlock(&sbi->s_alloc_mutex);
1933 mark_buffer_dirty(bh);
1934
1935 return ret;
1da177e4
LT		 1936}
1937
1da177e4
LT		 1938static int udf_fill_super(struct super_block *sb, void *options, int silent)
1939{
40346005 1940 int ret;
cb00ea35 1941 struct inode *inode = NULL;
1da177e4 1942 struct udf_options uopt;
5ca4e4be 1943 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 1944 struct udf_sb_info *sbi;
1945
1946 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 1947 uopt.uid = INVALID_UID;
1948 uopt.gid = INVALID_GID;
1da177e4 1949 uopt.umask = 0;
87bc730c
MS		 1950 uopt.fmode = UDF_INVALID_MODE;
1951 uopt.dmode = UDF_INVALID_MODE;
1da177e4 1952
6c79e987 1953 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 1954 if (!sbi)
1da177e4 1955 return -ENOMEM;
28de7948 1956
1da177e4 1957 sb->s_fs_info = sbi;
1da177e4 1958
1e7933de 1959 mutex_init(&sbi->s_alloc_mutex);
1da177e4 1960
6da80894 1961 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 1962 goto error_out;
1963
1964 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 1965 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 1966 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 1967 goto error_out;
1968 }
1969#ifdef CONFIG_UDF_NLS
cb00ea35 1970 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 1971 uopt.nls_map = load_nls_default();
1972 if (!uopt.nls_map)
1973 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1974 else
1975 udf_debug("Using default NLS map\n");
1976 }
1977#endif
1978 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1979 uopt.flags |= (1 << UDF_FLAG_UTF8);
1980
1981 fileset.logicalBlockNum = 0xFFFFFFFF;
1982 fileset.partitionReferenceNum = 0xFFFF;
1983
6c79e987
MS		 1984 sbi->s_flags = uopt.flags;
1985 sbi->s_uid = uopt.uid;
1986 sbi->s_gid = uopt.gid;
1987 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 1988 sbi->s_fmode = uopt.fmode;
1989 sbi->s_dmode = uopt.dmode;
6c79e987 1990 sbi->s_nls_map = uopt.nls_map;
c03cad24 1991 rwlock_init(&sbi->s_cred_lock);
1da177e4 1992
cb00ea35 1993 if (uopt.session == 0xFFFFFFFF)
6c79e987 1994 sbi->s_session = udf_get_last_session(sb);
1da177e4 1995 else
6c79e987 1996 sbi->s_session = uopt.session;
1da177e4 1997
6c79e987 1998 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 1999
40346005
JK		 2000 /* Fill in the rest of the superblock */
2001 sb->s_op = &udf_sb_ops;
2002 sb->s_export_op = &udf_export_ops;
123e9caf 2003
40346005
JK		 2004 sb->s_magic = UDF_SUPER_MAGIC;
2005 sb->s_time_gran = 1000;
2006
1197e4df 2007 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2008 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2009 } else {
e1defc4f 2010 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005
JK		 2011 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2012 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2013 if (!silent)
78ace70c
JP		 2014 pr_notice("Rescanning with blocksize %d\n",
2015 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2016 brelse(sbi->s_lvid_bh);
2017 sbi->s_lvid_bh = NULL;
1197e4df 2018 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2019 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2020 }
1da177e4 2021 }
40346005 2022 if (!ret) {
78ace70c 2023 udf_warn(sb, "No partition found (1)\n");
1da177e4
LT		 2024 goto error_out;
2025 }
2026
6c79e987 2027 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2028
6c79e987 2029 if (sbi->s_lvid_bh) {
4b11111a
MS		 2030 struct logicalVolIntegrityDescImpUse *lvidiu =
2031 udf_sb_lvidiu(sbi);
6c79e987
MS		 2032 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2033 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
4b11111a
MS		 2034 /* uint16_t maxUDFWriteRev =
2035 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1da177e4 2036
cb00ea35 2037 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c
JP		 2038 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2039 le16_to_cpu(lvidiu->minUDFReadRev),
2040 UDF_MAX_READ_VERSION);
1da177e4 2041 goto error_out;
4b11111a 2042 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1da177e4 2043 sb->s_flags |= MS_RDONLY;
1da177e4 2044
6c79e987 2045 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2046
2047 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2048 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2049 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2050 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2051 }
2052
6c79e987 2053 if (!sbi->s_partitions) {
78ace70c 2054 udf_warn(sb, "No partition found (2)\n");
1da177e4
LT		 2055 goto error_out;
2056 }
2057
4b11111a
MS		 2058 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2059 UDF_PART_FLAG_READ_ONLY) {
78ace70c 2060 pr_notice("Partition marked readonly; forcing readonly mount\n");
39b3f6d6 2061 sb->s_flags |= MS_RDONLY;
c1a26e7d 2062 }
39b3f6d6 2063
cb00ea35 2064 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2065 udf_warn(sb, "No fileset found\n");
1da177e4
LT		 2066 goto error_out;
2067 }
2068
cb00ea35 2069 if (!silent) {
5ca4e4be 2070 struct timestamp ts;
56774805 2071 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2072 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2073 sbi->s_volume_ident,
2074 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2075 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2076 }
2077 if (!(sb->s_flags & MS_RDONLY))
2078 udf_open_lvid(sb);
2079
2080 /* Assign the root inode */
2081 /* assign inodes by physical block number */
2082 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2083 inode = udf_iget(sb, &rootdir);
cb00ea35 2084 if (!inode) {
78ace70c 2085 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2086 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1da177e4
LT		 2087 goto error_out;
2088 }
2089
2090 /* Allocate a dentry for the root inode */
48fde701 2091 sb->s_root = d_make_root(inode);
cb00ea35 2092 if (!sb->s_root) {
78ace70c 2093 udf_err(sb, "Couldn't allocate root dentry\n");
1da177e4
LT		 2094 goto error_out;
2095 }
31170b6a 2096 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2097 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2098 return 0;
2099
28de7948 2100error_out:
6c79e987
MS		 2101 if (sbi->s_vat_inode)
2102 iput(sbi->s_vat_inode);
1da177e4
LT		 2103#ifdef CONFIG_UDF_NLS
2104 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2105 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2106#endif
2107 if (!(sb->s_flags & MS_RDONLY))
2108 udf_close_lvid(sb);
6c79e987 2109 brelse(sbi->s_lvid_bh);
bff943af 2110 udf_sb_free_partitions(sb);
1da177e4
LT		 2111 kfree(sbi);
2112 sb->s_fs_info = NULL;
28de7948 2113
1da177e4
LT		 2114 return -EINVAL;
2115}
2116
8076c363
JP		 2117void _udf_err(struct super_block *sb, const char *function,
2118 const char *fmt, ...)
1da177e4 2119{
c2bff36c 2120 struct va_format vaf;
1da177e4
LT		 2121 va_list args;
2122
1da177e4 2123 va_start(args, fmt);
c2bff36c
JP		 2124
2125 vaf.fmt = fmt;
2126 vaf.va = &args;
2127
2128 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2129
1da177e4 2130 va_end(args);
1da177e4
LT		 2131}
2132
a40ecd7b
JP		 2133void _udf_warn(struct super_block *sb, const char *function,
2134 const char *fmt, ...)
1da177e4 2135{
c2bff36c 2136 struct va_format vaf;
1da177e4
LT		 2137 va_list args;
2138
cb00ea35 2139 va_start(args, fmt);
c2bff36c
JP		 2140
2141 vaf.fmt = fmt;
2142 vaf.va = &args;
2143
2144 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2145
1da177e4 2146 va_end(args);
1da177e4
LT		 2147}
2148
cb00ea35 2149static void udf_put_super(struct super_block *sb)
1da177e4 2150{
6c79e987 2151 struct udf_sb_info *sbi;
1da177e4 2152
6c79e987 2153 sbi = UDF_SB(sb);
6cfd0148 2154
6c79e987
MS		 2155 if (sbi->s_vat_inode)
2156 iput(sbi->s_vat_inode);
1da177e4
LT		 2157#ifdef CONFIG_UDF_NLS
2158 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2159 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2160#endif
2161 if (!(sb->s_flags & MS_RDONLY))
2162 udf_close_lvid(sb);
6c79e987 2163 brelse(sbi->s_lvid_bh);
bff943af 2164 udf_sb_free_partitions(sb);
1da177e4
LT		 2165 kfree(sb->s_fs_info);
2166 sb->s_fs_info = NULL;
2167}
2168
146bca72
JK		 2169static int udf_sync_fs(struct super_block *sb, int wait)
2170{
2171 struct udf_sb_info *sbi = UDF_SB(sb);
2172
2173 mutex_lock(&sbi->s_alloc_mutex);
2174 if (sbi->s_lvid_dirty) {
2175 /*
2176 * Blockdevice will be synced later so we don't have to submit
2177 * the buffer for IO
2178 */
2179 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2180 sbi->s_lvid_dirty = 0;
2181 }
2182 mutex_unlock(&sbi->s_alloc_mutex);
2183
2184 return 0;
2185}
2186
cb00ea35 2187static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2188{
726c3342 2189 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2190 struct udf_sb_info *sbi = UDF_SB(sb);
2191 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2192 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987
MS		 2193
2194 if (sbi->s_lvid_bh != NULL)
2195 lvidiu = udf_sb_lvidiu(sbi);
2196 else
2197 lvidiu = NULL;
726c3342 2198
1da177e4
LT		 2199 buf->f_type = UDF_SUPER_MAGIC;
2200 buf->f_bsize = sb->s_blocksize;
6c79e987 2201 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2202 buf->f_bfree = udf_count_free(sb);
2203 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2204 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2205 le32_to_cpu(lvidiu->numDirs)) : 0)
2206 + buf->f_bfree;
1da177e4 2207 buf->f_ffree = buf->f_bfree;
cb00ea35 2208 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2209 buf->f_fsid.val[0] = (u32)id;
2210 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2211
2212 return 0;
2213}
2214
4b11111a
MS		 2215static unsigned int udf_count_free_bitmap(struct super_block *sb,
2216 struct udf_bitmap *bitmap)
1da177e4
LT		 2217{
2218 struct buffer_head *bh = NULL;
2219 unsigned int accum = 0;
2220 int index;
2221 int block = 0, newblock;
5ca4e4be 2222 struct kernel_lb_addr loc;
1da177e4 2223 uint32_t bytes;
1da177e4
LT		 2224 uint8_t *ptr;
2225 uint16_t ident;
2226 struct spaceBitmapDesc *bm;
2227
1da177e4 2228 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2229 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2230 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2231
cb00ea35 2232 if (!bh) {
78ace70c 2233 udf_err(sb, "udf_count_free failed\n");
1da177e4 2234 goto out;
cb00ea35 2235 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2236 brelse(bh);
78ace70c 2237 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2238 goto out;
2239 }
2240
2241 bm = (struct spaceBitmapDesc *)bh->b_data;
2242 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2243 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2244 ptr = (uint8_t *)bh->b_data;
1da177e4 2245
cb00ea35 2246 while (bytes > 0) {
01b954a3
MS		 2247 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2248 accum += bitmap_weight((const unsigned long *)(ptr + index),
2249 cur_bytes * 8);
2250 bytes -= cur_bytes;
cb00ea35 2251 if (bytes) {
3bf25cb4 2252 brelse(bh);
97e961fd 2253 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2254 bh = udf_tread(sb, newblock);
cb00ea35 2255 if (!bh) {
1da177e4
LT		 2256 udf_debug("read failed\n");
2257 goto out;
2258 }
2259 index = 0;
28de7948 2260 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2261 }
2262 }
3bf25cb4 2263 brelse(bh);
28de7948 2264out:
1da177e4
LT		 2265 return accum;
2266}
2267
4b11111a
MS		 2268static unsigned int udf_count_free_table(struct super_block *sb,
2269 struct inode *table)
1da177e4
LT		 2270{
2271 unsigned int accum = 0;
ff116fc8 2272 uint32_t elen;
5ca4e4be 2273 struct kernel_lb_addr eloc;
1da177e4 2274 int8_t etype;
ff116fc8 2275 struct extent_position epos;
1da177e4 2276
d1668fe3 2277 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2278 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2279 epos.offset = sizeof(struct unallocSpaceEntry);
2280 epos.bh = NULL;
1da177e4 2281
3a71fc5d 2282 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2283 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2284
3bf25cb4 2285 brelse(epos.bh);
d1668fe3 2286 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2287
2288 return accum;
2289}
cb00ea35
CG		 2290
2291static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2292{
2293 unsigned int accum = 0;
6c79e987
MS		 2294 struct udf_sb_info *sbi;
2295 struct udf_part_map *map;
1da177e4 2296
6c79e987
MS		 2297 sbi = UDF_SB(sb);
2298 if (sbi->s_lvid_bh) {
4b11111a
MS		 2299 struct logicalVolIntegrityDesc *lvid =
2300 (struct logicalVolIntegrityDesc *)
2301 sbi->s_lvid_bh->b_data;
6c79e987 2302 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2303 accum = le32_to_cpu(
2304 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2305 if (accum == 0xFFFFFFFF)
2306 accum = 0;
2307 }
2308 }
2309
2310 if (accum)
2311 return accum;
2312
6c79e987
MS		 2313 map = &sbi->s_partmaps[sbi->s_partition];
2314 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2315 accum += udf_count_free_bitmap(sb,
6c79e987 2316 map->s_uspace.s_bitmap);
1da177e4 2317 }
6c79e987 2318 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2319 accum += udf_count_free_bitmap(sb,
6c79e987 2320 map->s_fspace.s_bitmap);
1da177e4
LT		 2321 }
2322 if (accum)
2323 return accum;
2324
6c79e987 2325 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2326 accum += udf_count_free_table(sb,
6c79e987 2327 map->s_uspace.s_table);
1da177e4 2328 }
6c79e987 2329 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2330 accum += udf_count_free_table(sb,
6c79e987 2331 map->s_fspace.s_table);
1da177e4
LT		 2332 }
2333
2334 return accum;
2335}
Linux 6.x block layer and io_uring tree(s)