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kmemcg: account certain kmem allocations to memcg
[deliverable/linux.git] / fs / udf / super.c
CommitLineData
1da177e4
LT		 1/*
2 * super.c
3 *
4 * PURPOSE
5 * Super block routines for the OSTA-UDF(tm) filesystem.
6 *
7 * DESCRIPTION
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
10 *
11 * This code is based on version 2.00 of the UDF specification,
12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
13 * http://www.osta.org/
14 * http://www.ecma.ch/
15 * http://www.iso.org/
16 *
1da177e4
LT		 17 * COPYRIGHT
18 * This file is distributed under the terms of the GNU General Public
19 * License (GPL). Copies of the GPL can be obtained from:
20 * ftp://prep.ai.mit.edu/pub/gnu/GPL
21 * Each contributing author retains all rights to their own work.
22 *
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
26 *
27 * HISTORY
28 *
29 * 09/24/98 dgb changed to allow compiling outside of kernel, and
30 * added some debugging.
31 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
32 * 10/16/98 attempting some multi-session support
33 * 10/17/98 added freespace count for "df"
34 * 11/11/98 gr added novrs option
35 * 11/26/98 dgb added fileset,anchor mount options
3a71fc5d
MS		 36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
1da177e4
LT		 38 * 12/20/98 find the free space bitmap (if it exists)
39 */
40
cb00ea35 41#include "udfdecl.h"
1da177e4 42
1da177e4
LT		 43#include <linux/blkdev.h>
44#include <linux/slab.h>
45#include <linux/kernel.h>
46#include <linux/module.h>
47#include <linux/parser.h>
48#include <linux/stat.h>
49#include <linux/cdrom.h>
50#include <linux/nls.h>
1da177e4
LT		 51#include <linux/vfs.h>
52#include <linux/vmalloc.h>
dc5d39be 53#include <linux/errno.h>
6da80894
MS		 54#include <linux/mount.h>
55#include <linux/seq_file.h>
01b954a3 56#include <linux/bitmap.h>
f845fced 57#include <linux/crc-itu-t.h>
1df2ae31 58#include <linux/log2.h>
1da177e4
LT		 59#include <asm/byteorder.h>
60
1da177e4
LT		 61#include "udf_sb.h"
62#include "udf_i.h"
63
64#include <linux/init.h>
e973606c 65#include <linux/uaccess.h>
1da177e4
LT		 66
67#define VDS_POS_PRIMARY_VOL_DESC 0
68#define VDS_POS_UNALLOC_SPACE_DESC 1
69#define VDS_POS_LOGICAL_VOL_DESC 2
70#define VDS_POS_PARTITION_DESC 3
71#define VDS_POS_IMP_USE_VOL_DESC 4
72#define VDS_POS_VOL_DESC_PTR 5
73#define VDS_POS_TERMINATING_DESC 6
74#define VDS_POS_LENGTH 7
75
6da80894
MS		 76#define UDF_DEFAULT_BLOCKSIZE 2048
77
44499602
PF		 78#define VSD_FIRST_SECTOR_OFFSET 32768
79#define VSD_MAX_SECTOR_OFFSET 0x800000
80
8de52778
AV		 81enum { UDF_MAX_LINKS = 0xffff };
82
1da177e4
LT		 83/* These are the "meat" - everything else is stuffing */
84static int udf_fill_super(struct super_block *, void *, int);
85static void udf_put_super(struct super_block *);
146bca72 86static int udf_sync_fs(struct super_block *, int);
1da177e4 87static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 88static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 89static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
90 struct kernel_lb_addr *);
cb00ea35 91static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 92 struct kernel_lb_addr *);
1da177e4
LT		 93static void udf_open_lvid(struct super_block *);
94static void udf_close_lvid(struct super_block *);
95static unsigned int udf_count_free(struct super_block *);
726c3342 96static int udf_statfs(struct dentry *, struct kstatfs *);
34c80b1d 97static int udf_show_options(struct seq_file *, struct dentry *);
1da177e4 98
69d75671 99struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
6c79e987 100{
69d75671
JK		 101 struct logicalVolIntegrityDesc *lvid;
102 unsigned int partnum;
103 unsigned int offset;
104
105 if (!UDF_SB(sb)->s_lvid_bh)
106 return NULL;
107 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
108 partnum = le32_to_cpu(lvid->numOfPartitions);
109 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
110 offsetof(struct logicalVolIntegrityDesc, impUse)) /
111 (2 * sizeof(uint32_t)) < partnum) {
112 udf_err(sb, "Logical volume integrity descriptor corrupted "
113 "(numOfPartitions = %u)!\n", partnum);
114 return NULL;
115 }
116 /* The offset is to skip freeSpaceTable and sizeTable arrays */
117 offset = partnum * 2 * sizeof(uint32_t);
6c79e987
MS		 118 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
119}
120
1da177e4 121/* UDF filesystem type */
152a0836
AV		 122static struct dentry *udf_mount(struct file_system_type *fs_type,
123 int flags, const char *dev_name, void *data)
1da177e4 124{
152a0836 125 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 126}
127
128static struct file_system_type udf_fstype = {
28de7948
CG		 129 .owner = THIS_MODULE,
130 .name = "udf",
152a0836 131 .mount = udf_mount,
28de7948
CG		 132 .kill_sb = kill_block_super,
133 .fs_flags = FS_REQUIRES_DEV,
1da177e4 134};
3e64fe5b 135MODULE_ALIAS_FS("udf");
1da177e4 136
cb00ea35 137static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 138
139static struct inode *udf_alloc_inode(struct super_block *sb)
140{
141 struct udf_inode_info *ei;
3a71fc5d 142 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 143 if (!ei)
144 return NULL;
95f8797f
DB		 145
146 ei->i_unique = 0;
147 ei->i_lenExtents = 0;
148 ei->i_next_alloc_block = 0;
149 ei->i_next_alloc_goal = 0;
150 ei->i_strat4096 = 0;
4d0fb621 151 init_rwsem(&ei->i_data_sem);
99600051
NJ		 152 ei->cached_extent.lstart = -1;
153 spin_lock_init(&ei->i_extent_cache_lock);
95f8797f 154
1da177e4
LT		 155 return &ei->vfs_inode;
156}
157
fa0d7e3d 158static void udf_i_callback(struct rcu_head *head)
1da177e4 159{
fa0d7e3d 160 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 161 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
162}
163
fa0d7e3d
NP		 164static void udf_destroy_inode(struct inode *inode)
165{
166 call_rcu(&inode->i_rcu, udf_i_callback);
167}
168
51cc5068 169static void init_once(void *foo)
1da177e4 170{
cb00ea35 171 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 172
a35afb83
CL		 173 ei->i_ext.i_data = NULL;
174 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 175}
176
53ea18de 177static int __init init_inodecache(void)
1da177e4
LT		 178{
179 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
180 sizeof(struct udf_inode_info),
cb00ea35 181 0, (SLAB_RECLAIM_ACCOUNT |
5d097056
VD		 182 SLAB_MEM_SPREAD |
183 SLAB_ACCOUNT),
20c2df83 184 init_once);
28de7948 185 if (!udf_inode_cachep)
1da177e4
LT		 186 return -ENOMEM;
187 return 0;
188}
189
190static void destroy_inodecache(void)
191{
8c0a8537
KS		 192 /*
193 * Make sure all delayed rcu free inodes are flushed before we
194 * destroy cache.
195 */
196 rcu_barrier();
1a1d92c1 197 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 198}
199
200/* Superblock operations */
ee9b6d61 201static const struct super_operations udf_sb_ops = {
28de7948
CG		 202 .alloc_inode = udf_alloc_inode,
203 .destroy_inode = udf_destroy_inode,
204 .write_inode = udf_write_inode,
3aac2b62 205 .evict_inode = udf_evict_inode,
28de7948 206 .put_super = udf_put_super,
146bca72 207 .sync_fs = udf_sync_fs,
28de7948
CG		 208 .statfs = udf_statfs,
209 .remount_fs = udf_remount_fs,
6da80894 210 .show_options = udf_show_options,
1da177e4
LT		 211};
212
cb00ea35 213struct udf_options {
1da177e4
LT		 214 unsigned char novrs;
215 unsigned int blocksize;
216 unsigned int session;
217 unsigned int lastblock;
218 unsigned int anchor;
219 unsigned int volume;
220 unsigned short partition;
221 unsigned int fileset;
222 unsigned int rootdir;
223 unsigned int flags;
faa17292 224 umode_t umask;
c2ba138a
EB		 225 kgid_t gid;
226 kuid_t uid;
faa17292
AV		 227 umode_t fmode;
228 umode_t dmode;
1da177e4
LT		 229 struct nls_table *nls_map;
230};
231
232static int __init init_udf_fs(void)
233{
234 int err;
28de7948 235
1da177e4
LT		 236 err = init_inodecache();
237 if (err)
238 goto out1;
239 err = register_filesystem(&udf_fstype);
240 if (err)
241 goto out;
28de7948 242
1da177e4 243 return 0;
28de7948
CG		 244
245out:
1da177e4 246 destroy_inodecache();
28de7948
CG		 247
248out1:
1da177e4
LT		 249 return err;
250}
251
252static void __exit exit_udf_fs(void)
253{
254 unregister_filesystem(&udf_fstype);
255 destroy_inodecache();
256}
257
258module_init(init_udf_fs)
28de7948 259module_exit(exit_udf_fs)
1da177e4 260
dc5d39be
MS		 261static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
262{
263 struct udf_sb_info *sbi = UDF_SB(sb);
264
265 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
266 GFP_KERNEL);
267 if (!sbi->s_partmaps) {
8076c363
JP		 268 udf_err(sb, "Unable to allocate space for %d partition maps\n",
269 count);
dc5d39be
MS		 270 sbi->s_partitions = 0;
271 return -ENOMEM;
272 }
273
274 sbi->s_partitions = count;
275 return 0;
276}
277
bff943af
JK		 278static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
279{
280 int i;
281 int nr_groups = bitmap->s_nr_groups;
282 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
283 nr_groups);
284
285 for (i = 0; i < nr_groups; i++)
286 if (bitmap->s_block_bitmap[i])
287 brelse(bitmap->s_block_bitmap[i]);
288
289 if (size <= PAGE_SIZE)
290 kfree(bitmap);
291 else
292 vfree(bitmap);
293}
294
295static void udf_free_partition(struct udf_part_map *map)
296{
297 int i;
298 struct udf_meta_data *mdata;
299
300 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
301 iput(map->s_uspace.s_table);
302 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
303 iput(map->s_fspace.s_table);
304 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
305 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
306 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
307 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
308 if (map->s_partition_type == UDF_SPARABLE_MAP15)
309 for (i = 0; i < 4; i++)
310 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
311 else if (map->s_partition_type == UDF_METADATA_MAP25) {
312 mdata = &map->s_type_specific.s_metadata;
313 iput(mdata->s_metadata_fe);
314 mdata->s_metadata_fe = NULL;
315
316 iput(mdata->s_mirror_fe);
317 mdata->s_mirror_fe = NULL;
318
319 iput(mdata->s_bitmap_fe);
320 mdata->s_bitmap_fe = NULL;
321 }
322}
323
324static void udf_sb_free_partitions(struct super_block *sb)
325{
326 struct udf_sb_info *sbi = UDF_SB(sb);
327 int i;
1b1baff6
NJ		 328 if (sbi->s_partmaps == NULL)
329 return;
bff943af
JK		 330 for (i = 0; i < sbi->s_partitions; i++)
331 udf_free_partition(&sbi->s_partmaps[i]);
332 kfree(sbi->s_partmaps);
333 sbi->s_partmaps = NULL;
334}
335
34c80b1d 336static int udf_show_options(struct seq_file *seq, struct dentry *root)
6da80894 337{
34c80b1d 338 struct super_block *sb = root->d_sb;
6da80894
MS		 339 struct udf_sb_info *sbi = UDF_SB(sb);
340
341 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
342 seq_puts(seq, ",nostrict");
1197e4df 343 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 344 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
345 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
346 seq_puts(seq, ",unhide");
347 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
348 seq_puts(seq, ",undelete");
349 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
350 seq_puts(seq, ",noadinicb");
351 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
352 seq_puts(seq, ",shortad");
353 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
354 seq_puts(seq, ",uid=forget");
355 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
356 seq_puts(seq, ",uid=ignore");
357 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
358 seq_puts(seq, ",gid=forget");
359 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
360 seq_puts(seq, ",gid=ignore");
361 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
c2ba138a 362 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
6da80894 363 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
c2ba138a 364 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
6da80894 365 if (sbi->s_umask != 0)
faa17292 366 seq_printf(seq, ",umask=%ho", sbi->s_umask);
87bc730c 367 if (sbi->s_fmode != UDF_INVALID_MODE)
faa17292 368 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
87bc730c 369 if (sbi->s_dmode != UDF_INVALID_MODE)
faa17292 370 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
6da80894
MS		 371 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
372 seq_printf(seq, ",session=%u", sbi->s_session);
373 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
374 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 375 if (sbi->s_anchor != 0)
376 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 377 /*
378 * volume, partition, fileset and rootdir seem to be ignored
379 * currently
380 */
381 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
382 seq_puts(seq, ",utf8");
383 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
384 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
385
386 return 0;
387}
388
1da177e4
LT		 389/*
390 * udf_parse_options
391 *
392 * PURPOSE
393 * Parse mount options.
394 *
395 * DESCRIPTION
396 * The following mount options are supported:
397 *
398 * gid= Set the default group.
399 * umask= Set the default umask.
7ac9bcd5
MS		 400 * mode= Set the default file permissions.
401 * dmode= Set the default directory permissions.
1da177e4
LT		 402 * uid= Set the default user.
403 * bs= Set the block size.
404 * unhide Show otherwise hidden files.
405 * undelete Show deleted files in lists.
406 * adinicb Embed data in the inode (default)
407 * noadinicb Don't embed data in the inode
408 * shortad Use short ad's
409 * longad Use long ad's (default)
410 * nostrict Unset strict conformance
411 * iocharset= Set the NLS character set
412 *
413 * The remaining are for debugging and disaster recovery:
414 *
28de7948 415 * novrs Skip volume sequence recognition
1da177e4
LT		 416 *
417 * The following expect a offset from 0.
418 *
419 * session= Set the CDROM session (default= last session)
420 * anchor= Override standard anchor location. (default= 256)
421 * volume= Override the VolumeDesc location. (unused)
422 * partition= Override the PartitionDesc location. (unused)
423 * lastblock= Set the last block of the filesystem/
424 *
425 * The following expect a offset from the partition root.
426 *
427 * fileset= Override the fileset block location. (unused)
428 * rootdir= Override the root directory location. (unused)
429 * WARNING: overriding the rootdir to a non-directory may
430 * yield highly unpredictable results.
431 *
432 * PRE-CONDITIONS
433 * options Pointer to mount options string.
434 * uopts Pointer to mount options variable.
435 *
436 * POST-CONDITIONS
437 * <return> 1 Mount options parsed okay.
438 * <return> 0 Error parsing mount options.
439 *
440 * HISTORY
441 * July 1, 1997 - Andrew E. Mileski
442 * Written, tested, and released.
443 */
28de7948 444
1da177e4
LT		 445enum {
446 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
447 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
448 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
449 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
450 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 451 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
452 Opt_fmode, Opt_dmode
1da177e4
LT		 453};
454
a447c093 455static const match_table_t tokens = {
28de7948
CG		 456 {Opt_novrs, "novrs"},
457 {Opt_nostrict, "nostrict"},
458 {Opt_bs, "bs=%u"},
459 {Opt_unhide, "unhide"},
460 {Opt_undelete, "undelete"},
461 {Opt_noadinicb, "noadinicb"},
462 {Opt_adinicb, "adinicb"},
463 {Opt_shortad, "shortad"},
464 {Opt_longad, "longad"},
465 {Opt_uforget, "uid=forget"},
466 {Opt_uignore, "uid=ignore"},
467 {Opt_gforget, "gid=forget"},
468 {Opt_gignore, "gid=ignore"},
469 {Opt_gid, "gid=%u"},
470 {Opt_uid, "uid=%u"},
471 {Opt_umask, "umask=%o"},
472 {Opt_session, "session=%u"},
473 {Opt_lastblock, "lastblock=%u"},
474 {Opt_anchor, "anchor=%u"},
475 {Opt_volume, "volume=%u"},
476 {Opt_partition, "partition=%u"},
477 {Opt_fileset, "fileset=%u"},
478 {Opt_rootdir, "rootdir=%u"},
479 {Opt_utf8, "utf8"},
480 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 481 {Opt_fmode, "mode=%o"},
482 {Opt_dmode, "dmode=%o"},
28de7948 483 {Opt_err, NULL}
1da177e4
LT		 484};
485
6da80894
MS		 486static int udf_parse_options(char *options, struct udf_options *uopt,
487 bool remount)
1da177e4
LT		 488{
489 char *p;
490 int option;
491
492 uopt->novrs = 0;
1da177e4
LT		 493 uopt->partition = 0xFFFF;
494 uopt->session = 0xFFFFFFFF;
495 uopt->lastblock = 0;
496 uopt->anchor = 0;
497 uopt->volume = 0xFFFFFFFF;
498 uopt->rootdir = 0xFFFFFFFF;
499 uopt->fileset = 0xFFFFFFFF;
500 uopt->nls_map = NULL;
501
502 if (!options)
503 return 1;
504
cb00ea35 505 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 506 substring_t args[MAX_OPT_ARGS];
507 int token;
8c6915ae 508 unsigned n;
1da177e4
LT		 509 if (!*p)
510 continue;
511
512 token = match_token(p, tokens, args);
cb00ea35
CG		 513 switch (token) {
514 case Opt_novrs:
515 uopt->novrs = 1;
4136801a 516 break;
cb00ea35
CG		 517 case Opt_bs:
518 if (match_int(&args[0], &option))
519 return 0;
8c6915ae
FF		 520 n = option;
521 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
522 return 0;
523 uopt->blocksize = n;
1197e4df 524 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 525 break;
526 case Opt_unhide:
527 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
528 break;
529 case Opt_undelete:
530 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
531 break;
532 case Opt_noadinicb:
533 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
534 break;
535 case Opt_adinicb:
536 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
537 break;
538 case Opt_shortad:
539 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
540 break;
541 case Opt_longad:
542 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
543 break;
544 case Opt_gid:
545 if (match_int(args, &option))
546 return 0;
c2ba138a
EB		 547 uopt->gid = make_kgid(current_user_ns(), option);
548 if (!gid_valid(uopt->gid))
549 return 0;
ca76d2d8 550 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 551 break;
552 case Opt_uid:
553 if (match_int(args, &option))
554 return 0;
c2ba138a
EB		 555 uopt->uid = make_kuid(current_user_ns(), option);
556 if (!uid_valid(uopt->uid))
557 return 0;
ca76d2d8 558 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 559 break;
560 case Opt_umask:
561 if (match_octal(args, &option))
562 return 0;
563 uopt->umask = option;
564 break;
565 case Opt_nostrict:
566 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
567 break;
568 case Opt_session:
569 if (match_int(args, &option))
570 return 0;
571 uopt->session = option;
6da80894
MS		 572 if (!remount)
573 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 574 break;
575 case Opt_lastblock:
576 if (match_int(args, &option))
577 return 0;
578 uopt->lastblock = option;
6da80894
MS		 579 if (!remount)
580 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 581 break;
582 case Opt_anchor:
583 if (match_int(args, &option))
584 return 0;
585 uopt->anchor = option;
586 break;
587 case Opt_volume:
588 if (match_int(args, &option))
589 return 0;
590 uopt->volume = option;
591 break;
592 case Opt_partition:
593 if (match_int(args, &option))
594 return 0;
595 uopt->partition = option;
596 break;
597 case Opt_fileset:
598 if (match_int(args, &option))
599 return 0;
600 uopt->fileset = option;
601 break;
602 case Opt_rootdir:
603 if (match_int(args, &option))
604 return 0;
605 uopt->rootdir = option;
606 break;
607 case Opt_utf8:
608 uopt->flags |= (1 << UDF_FLAG_UTF8);
609 break;
1da177e4 610#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 611 case Opt_iocharset:
612 uopt->nls_map = load_nls(args[0].from);
613 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
614 break;
1da177e4 615#endif
cb00ea35
CG		 616 case Opt_uignore:
617 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
618 break;
619 case Opt_uforget:
620 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
621 break;
622 case Opt_gignore:
623 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
624 break;
625 case Opt_gforget:
626 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
627 break;
7ac9bcd5
MS		 628 case Opt_fmode:
629 if (match_octal(args, &option))
630 return 0;
631 uopt->fmode = option & 0777;
632 break;
633 case Opt_dmode:
634 if (match_octal(args, &option))
635 return 0;
636 uopt->dmode = option & 0777;
637 break;
cb00ea35 638 default:
78ace70c 639 pr_err("bad mount option \"%s\" or missing value\n", p);
1da177e4
LT		 640 return 0;
641 }
642 }
643 return 1;
644}
645
cb00ea35 646static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 647{
648 struct udf_options uopt;
6c79e987 649 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 650 int error = 0;
69d75671 651 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
1da177e4 652
02b9984d 653 sync_filesystem(sb);
69d75671
JK		 654 if (lvidiu) {
655 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
e729eac6
JK		 656 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
657 return -EACCES;
658 }
659
6c79e987
MS		 660 uopt.flags = sbi->s_flags;
661 uopt.uid = sbi->s_uid;
662 uopt.gid = sbi->s_gid;
663 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 664 uopt.fmode = sbi->s_fmode;
665 uopt.dmode = sbi->s_dmode;
1da177e4 666
6da80894 667 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 668 return -EINVAL;
669
c03cad24 670 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 671 sbi->s_flags = uopt.flags;
672 sbi->s_uid = uopt.uid;
673 sbi->s_gid = uopt.gid;
674 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 675 sbi->s_fmode = uopt.fmode;
676 sbi->s_dmode = uopt.dmode;
c03cad24 677 write_unlock(&sbi->s_cred_lock);
1da177e4 678
c79d967d
CH		 679 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
680 goto out_unlock;
681
36350462 682 if (*flags & MS_RDONLY)
1da177e4 683 udf_close_lvid(sb);
36350462 684 else
1da177e4
LT		 685 udf_open_lvid(sb);
686
c79d967d 687out_unlock:
c79d967d 688 return error;
1da177e4
LT		 689}
690
40346005
JK		 691/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
692/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
693static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 694{
695 struct volStructDesc *vsd = NULL;
44499602 696 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
1da177e4
LT		 697 int sectorsize;
698 struct buffer_head *bh = NULL;
cb00ea35
CG		 699 int nsr02 = 0;
700 int nsr03 = 0;
6c79e987 701 struct udf_sb_info *sbi;
1da177e4 702
6c79e987 703 sbi = UDF_SB(sb);
1da177e4
LT		 704 if (sb->s_blocksize < sizeof(struct volStructDesc))
705 sectorsize = sizeof(struct volStructDesc);
706 else
707 sectorsize = sb->s_blocksize;
708
6c79e987 709 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 710
711 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 712 (unsigned int)(sector >> sb->s_blocksize_bits),
713 sb->s_blocksize);
44499602
PF		 714 /* Process the sequence (if applicable). The hard limit on the sector
715 * offset is arbitrary, hopefully large enough so that all valid UDF
716 * filesystems will be recognised. There is no mention of an upper
717 * bound to the size of the volume recognition area in the standard.
718 * The limit will prevent the code to read all the sectors of a
719 * specially crafted image (like a bluray disc full of CD001 sectors),
720 * potentially causing minutes or even hours of uninterruptible I/O
721 * activity. This actually happened with uninitialised SSD partitions
722 * (all 0xFF) before the check for the limit and all valid IDs were
723 * added */
724 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
725 sector += sectorsize) {
1da177e4
LT		 726 /* Read a block */
727 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
728 if (!bh)
729 break;
730
731 /* Look for ISO descriptors */
732 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 733 (sector & (sb->s_blocksize - 1)));
1da177e4 734
44499602 735 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
3a71fc5d 736 VSD_STD_ID_LEN)) {
cb00ea35
CG		 737 switch (vsd->structType) {
738 case 0:
739 udf_debug("ISO9660 Boot Record found\n");
740 break;
741 case 1:
a983f368 742 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 743 break;
744 case 2:
a983f368 745 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 746 break;
747 case 3:
a983f368 748 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 749 break;
750 case 255:
a983f368 751 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 752 break;
753 default:
754 udf_debug("ISO9660 VRS (%u) found\n",
755 vsd->structType);
756 break;
1da177e4 757 }
3a71fc5d
MS		 758 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
759 VSD_STD_ID_LEN))
760 ; /* nothing */
761 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
762 VSD_STD_ID_LEN)) {
3bf25cb4 763 brelse(bh);
1da177e4 764 break;
3a71fc5d
MS		 765 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
766 VSD_STD_ID_LEN))
1da177e4 767 nsr02 = sector;
3a71fc5d
MS		 768 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
769 VSD_STD_ID_LEN))
1da177e4 770 nsr03 = sector;
44499602
PF		 771 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
772 VSD_STD_ID_LEN))
773 ; /* nothing */
774 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
775 VSD_STD_ID_LEN))
776 ; /* nothing */
777 else {
778 /* invalid id : end of volume recognition area */
779 brelse(bh);
780 break;
781 }
3bf25cb4 782 brelse(bh);
1da177e4
LT		 783 }
784
785 if (nsr03)
786 return nsr03;
787 else if (nsr02)
788 return nsr02;
44499602
PF		 789 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
790 VSD_FIRST_SECTOR_OFFSET)
1da177e4
LT		 791 return -1;
792 else
793 return 0;
794}
795
3a71fc5d 796static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 797 struct kernel_lb_addr *fileset,
798 struct kernel_lb_addr *root)
1da177e4
LT		 799{
800 struct buffer_head *bh = NULL;
801 long lastblock;
802 uint16_t ident;
6c79e987 803 struct udf_sb_info *sbi;
1da177e4
LT		 804
805 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 806 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 807 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 808
28de7948 809 if (!bh) {
1da177e4 810 return 1;
28de7948 811 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 812 brelse(bh);
1da177e4
LT		 813 return 1;
814 }
cb00ea35 815
1da177e4
LT		 816 }
817
6c79e987 818 sbi = UDF_SB(sb);
3a71fc5d
MS		 819 if (!bh) {
820 /* Search backwards through the partitions */
5ca4e4be 821 struct kernel_lb_addr newfileset;
1da177e4 822
28de7948 823/* --> cvg: FIXME - is it reasonable? */
1da177e4 824 return 1;
cb00ea35 825
6c79e987 826 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 827 (newfileset.partitionReferenceNum != 0xFFFF &&
828 fileset->logicalBlockNum == 0xFFFFFFFF &&
829 fileset->partitionReferenceNum == 0xFFFF);
830 newfileset.partitionReferenceNum--) {
6c79e987
MS		 831 lastblock = sbi->s_partmaps
832 [newfileset.partitionReferenceNum]
833 .s_partition_len;
1da177e4
LT		 834 newfileset.logicalBlockNum = 0;
835
cb00ea35 836 do {
97e961fd 837 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 838 &ident);
cb00ea35
CG		 839 if (!bh) {
840 newfileset.logicalBlockNum++;
1da177e4
LT		 841 continue;
842 }
843
cb00ea35
CG		 844 switch (ident) {
845 case TAG_IDENT_SBD:
28de7948
CG		 846 {
847 struct spaceBitmapDesc *sp;
4b11111a
MS		 848 sp = (struct spaceBitmapDesc *)
849 bh->b_data;
28de7948
CG		 850 newfileset.logicalBlockNum += 1 +
851 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 852 sizeof(struct spaceBitmapDesc)
853 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 854 brelse(bh);
855 break;
856 }
cb00ea35 857 case TAG_IDENT_FSD:
28de7948
CG		 858 *fileset = newfileset;
859 break;
cb00ea35 860 default:
28de7948
CG		 861 newfileset.logicalBlockNum++;
862 brelse(bh);
863 bh = NULL;
864 break;
1da177e4 865 }
28de7948
CG		 866 } while (newfileset.logicalBlockNum < lastblock &&
867 fileset->logicalBlockNum == 0xFFFFFFFF &&
868 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 869 }
870 }
871
872 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 873 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 874 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 875 fileset->logicalBlockNum,
876 fileset->partitionReferenceNum);
1da177e4 877
6c79e987 878 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 879 udf_load_fileset(sb, bh, root);
3bf25cb4 880 brelse(bh);
1da177e4
LT		 881 return 0;
882 }
883 return 1;
884}
885
d759bfa4
JK		 886/*
887 * Load primary Volume Descriptor Sequence
888 *
889 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
890 * should be tried.
891 */
c0eb31ed 892static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 893{
894 struct primaryVolDesc *pvoldesc;
ba9aadd8 895 struct ustr *instr, *outstr;
c0eb31ed
JK		 896 struct buffer_head *bh;
897 uint16_t ident;
d759bfa4 898 int ret = -ENOMEM;
ba9aadd8
MS		 899
900 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
901 if (!instr)
d759bfa4 902 return -ENOMEM;
ba9aadd8
MS		 903
904 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
905 if (!outstr)
906 goto out1;
c0eb31ed
JK		 907
908 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 909 if (!bh) {
910 ret = -EAGAIN;
ba9aadd8 911 goto out2;
d759bfa4 912 }
ba9aadd8 913
d759bfa4
JK		 914 if (ident != TAG_IDENT_PVD) {
915 ret = -EIO;
916 goto out_bh;
917 }
1da177e4
LT		 918
919 pvoldesc = (struct primaryVolDesc *)bh->b_data;
920
56774805
MS		 921 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
922 pvoldesc->recordingDateAndTime)) {
af15a298 923#ifdef UDFFS_DEBUG
5ca4e4be 924 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 925 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 926 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
927 ts->minute, le16_to_cpu(ts->typeAndTimezone));
928#endif
1da177e4
LT		 929 }
930
e9d4cf41
FF		 931 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) {
932 ret = udf_CS0toUTF8(outstr, instr);
933 if (ret < 0)
934 goto out_bh;
935
936 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
937 outstr->u_len > 31 ? 31 : outstr->u_len);
938 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
939 }
1da177e4 940
792352cb 941 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) {
e9d4cf41
FF		 942 ret = udf_CS0toUTF8(outstr, instr);
943 if (ret < 0)
944 goto out_bh;
945
946 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
792352cb 947 }
c0eb31ed 948
ba9aadd8 949 ret = 0;
d759bfa4
JK		 950out_bh:
951 brelse(bh);
ba9aadd8
MS		 952out2:
953 kfree(outstr);
954out1:
955 kfree(instr);
956 return ret;
1da177e4
LT		 957}
958
3080a74e
NJ		 959struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
960 u32 meta_file_loc, u32 partition_num)
961{
962 struct kernel_lb_addr addr;
963 struct inode *metadata_fe;
964
965 addr.logicalBlockNum = meta_file_loc;
966 addr.partitionReferenceNum = partition_num;
967
6174c2eb 968 metadata_fe = udf_iget_special(sb, &addr);
3080a74e 969
6d3d5e86 970 if (IS_ERR(metadata_fe)) {
3080a74e 971 udf_warn(sb, "metadata inode efe not found\n");
6d3d5e86
JK		 972 return metadata_fe;
973 }
974 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
3080a74e
NJ		 975 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
976 iput(metadata_fe);
6d3d5e86 977 return ERR_PTR(-EIO);
3080a74e
NJ		 978 }
979
980 return metadata_fe;
981}
982
bfb257a5
JK		 983static int udf_load_metadata_files(struct super_block *sb, int partition)
984{
985 struct udf_sb_info *sbi = UDF_SB(sb);
986 struct udf_part_map *map;
987 struct udf_meta_data *mdata;
5ca4e4be 988 struct kernel_lb_addr addr;
6d3d5e86 989 struct inode *fe;
bfb257a5
JK		 990
991 map = &sbi->s_partmaps[partition];
992 mdata = &map->s_type_specific.s_metadata;
993
994 /* metadata address */
bfb257a5 995 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 996 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 997
6d3d5e86
JK		 998 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
999 map->s_partition_num);
1000 if (IS_ERR(fe)) {
3080a74e
NJ		 1001 /* mirror file entry */
1002 udf_debug("Mirror metadata file location: block = %d part = %d\n",
1003 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 1004
6d3d5e86
JK		 1005 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
1006 map->s_partition_num);
bfb257a5 1007
6d3d5e86 1008 if (IS_ERR(fe)) {
3080a74e 1009 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
6d3d5e86 1010 return PTR_ERR(fe);
3080a74e 1011 }
6d3d5e86
JK		 1012 mdata->s_mirror_fe = fe;
1013 } else
1014 mdata->s_metadata_fe = fe;
1015
bfb257a5
JK		 1016
1017 /*
1018 * bitmap file entry
1019 * Note:
1020 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1021 */
1022 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1023 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1024 addr.partitionReferenceNum = map->s_partition_num;
1025
1026 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 1027 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 1028
6174c2eb 1029 fe = udf_iget_special(sb, &addr);
6d3d5e86 1030 if (IS_ERR(fe)) {
bfb257a5 1031 if (sb->s_flags & MS_RDONLY)
a40ecd7b 1032 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 1033 else {
8076c363 1034 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
6d3d5e86 1035 return PTR_ERR(fe);
bfb257a5 1036 }
6d3d5e86
JK		 1037 } else
1038 mdata->s_bitmap_fe = fe;
bfb257a5
JK		 1039 }
1040
1041 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 1042 return 0;
bfb257a5
JK		 1043}
1044
28de7948 1045static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1046 struct kernel_lb_addr *root)
1da177e4
LT		 1047{
1048 struct fileSetDesc *fset;
1049
1050 fset = (struct fileSetDesc *)bh->b_data;
1051
1052 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1053
6c79e987 1054 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1055
cb00ea35
CG		 1056 udf_debug("Rootdir at block=%d, partition=%d\n",
1057 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1058}
1059
883cb9d1
MS		 1060int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1061{
1062 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1063 return DIV_ROUND_UP(map->s_partition_len +
1064 (sizeof(struct spaceBitmapDesc) << 3),
1065 sb->s_blocksize * 8);
883cb9d1
MS		 1066}
1067
66e1da3f
MS		 1068static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1069{
66e1da3f
MS		 1070 struct udf_bitmap *bitmap;
1071 int nr_groups;
1072 int size;
1073
883cb9d1 1074 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1075 size = sizeof(struct udf_bitmap) +
1076 (sizeof(struct buffer_head *) * nr_groups);
1077
1078 if (size <= PAGE_SIZE)
ed2ae6f6 1079 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1080 else
ed2ae6f6 1081 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1082
75b09e02 1083 if (bitmap == NULL)
66e1da3f 1084 return NULL;
66e1da3f 1085
66e1da3f
MS		 1086 bitmap->s_nr_groups = nr_groups;
1087 return bitmap;
1088}
1089
3fb38dfa
JK		 1090static int udf_fill_partdesc_info(struct super_block *sb,
1091 struct partitionDesc *p, int p_index)
1da177e4 1092{
6c79e987 1093 struct udf_part_map *map;
165923fa 1094 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1095 struct partitionHeaderDesc *phd;
165923fa 1096
3fb38dfa 1097 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1098
1099 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1100 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1101
1102 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1103 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1104 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1105 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1106 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1107 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1108 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1109 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1110
a983f368
JP		 1111 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1112 p_index, map->s_partition_type,
1113 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1114
1115 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1116 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1117 return 0;
165923fa
MS		 1118
1119 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1120 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1121 struct kernel_lb_addr loc = {
165923fa
MS		 1122 .logicalBlockNum = le32_to_cpu(
1123 phd->unallocSpaceTable.extPosition),
3fb38dfa 1124 .partitionReferenceNum = p_index,
165923fa 1125 };
6d3d5e86 1126 struct inode *inode;
165923fa 1127
6174c2eb 1128 inode = udf_iget_special(sb, &loc);
6d3d5e86 1129 if (IS_ERR(inode)) {
165923fa 1130 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1131 p_index);
6d3d5e86 1132 return PTR_ERR(inode);
165923fa 1133 }
6d3d5e86 1134 map->s_uspace.s_table = inode;
165923fa
MS		 1135 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1136 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1137 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1138 }
1139
1140 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1141 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1142 if (!bitmap)
d759bfa4 1143 return -ENOMEM;
165923fa 1144 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1145 bitmap->s_extPosition = le32_to_cpu(
165923fa 1146 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1147 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1148 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1149 p_index, bitmap->s_extPosition);
165923fa
MS		 1150 }
1151
1152 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1153 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1154
1155 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1156 struct kernel_lb_addr loc = {
165923fa
MS		 1157 .logicalBlockNum = le32_to_cpu(
1158 phd->freedSpaceTable.extPosition),
3fb38dfa 1159 .partitionReferenceNum = p_index,
165923fa 1160 };
6d3d5e86 1161 struct inode *inode;
165923fa 1162
6174c2eb 1163 inode = udf_iget_special(sb, &loc);
6d3d5e86 1164 if (IS_ERR(inode)) {
3fb38dfa 1165 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1166 p_index);
6d3d5e86 1167 return PTR_ERR(inode);
165923fa 1168 }
6d3d5e86 1169 map->s_fspace.s_table = inode;
165923fa
MS		 1170 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1171 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1172 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1173 }
1174
1175 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1176 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1177 if (!bitmap)
d759bfa4 1178 return -ENOMEM;
165923fa 1179 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1180 bitmap->s_extPosition = le32_to_cpu(
165923fa 1181 phd->freedSpaceBitmap.extPosition);
2e0838fd 1182 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1183 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1184 p_index, bitmap->s_extPosition);
165923fa 1185 }
3fb38dfa
JK		 1186 return 0;
1187}
1188
e971b0b9
JK		 1189static void udf_find_vat_block(struct super_block *sb, int p_index,
1190 int type1_index, sector_t start_block)
38b74a53
JK		 1191{
1192 struct udf_sb_info *sbi = UDF_SB(sb);
1193 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1194 sector_t vat_block;
5ca4e4be 1195 struct kernel_lb_addr ino;
6d3d5e86 1196 struct inode *inode;
e971b0b9
JK		 1197
1198 /*
1199 * VAT file entry is in the last recorded block. Some broken disks have
1200 * it a few blocks before so try a bit harder...
1201 */
1202 ino.partitionReferenceNum = type1_index;
1203 for (vat_block = start_block;
1204 vat_block >= map->s_partition_root &&
6d3d5e86 1205 vat_block >= start_block - 3; vat_block--) {
e971b0b9 1206 ino.logicalBlockNum = vat_block - map->s_partition_root;
6174c2eb 1207 inode = udf_iget_special(sb, &ino);
6d3d5e86
JK		 1208 if (!IS_ERR(inode)) {
1209 sbi->s_vat_inode = inode;
1210 break;
1211 }
e971b0b9
JK		 1212 }
1213}
1214
1215static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1216{
1217 struct udf_sb_info *sbi = UDF_SB(sb);
1218 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1219 struct buffer_head *bh = NULL;
1220 struct udf_inode_info *vati;
1221 uint32_t pos;
1222 struct virtualAllocationTable20 *vat20;
4bf17af0 1223 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1224
e971b0b9 1225 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1226 if (!sbi->s_vat_inode &&
1227 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1228 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1229 (unsigned long)sbi->s_last_block,
1230 (unsigned long)blocks - 1);
e971b0b9 1231 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1232 }
38b74a53 1233 if (!sbi->s_vat_inode)
d759bfa4 1234 return -EIO;
38b74a53
JK		 1235
1236 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1237 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1238 map->s_type_specific.s_virtual.s_num_entries =
1239 (sbi->s_vat_inode->i_size - 36) >> 2;
1240 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1241 vati = UDF_I(sbi->s_vat_inode);
1242 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1243 pos = udf_block_map(sbi->s_vat_inode, 0);
1244 bh = sb_bread(sb, pos);
1245 if (!bh)
d759bfa4 1246 return -EIO;
fa5e0815
JK		 1247 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1248 } else {
1249 vat20 = (struct virtualAllocationTable20 *)
1250 vati->i_ext.i_data;
1251 }
38b74a53 1252
38b74a53 1253 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1254 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1255 map->s_type_specific.s_virtual.s_num_entries =
1256 (sbi->s_vat_inode->i_size -
1257 map->s_type_specific.s_virtual.
1258 s_start_offset) >> 2;
1259 brelse(bh);
1260 }
1261 return 0;
1262}
1263
d759bfa4
JK		 1264/*
1265 * Load partition descriptor block
1266 *
1267 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1268 * sequence.
1269 */
3fb38dfa
JK		 1270static int udf_load_partdesc(struct super_block *sb, sector_t block)
1271{
1272 struct buffer_head *bh;
1273 struct partitionDesc *p;
1274 struct udf_part_map *map;
1275 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1276 int i, type1_idx;
3fb38dfa
JK		 1277 uint16_t partitionNumber;
1278 uint16_t ident;
d759bfa4 1279 int ret;
3fb38dfa
JK		 1280
1281 bh = udf_read_tagged(sb, block, block, &ident);
1282 if (!bh)
d759bfa4
JK		 1283 return -EAGAIN;
1284 if (ident != TAG_IDENT_PD) {
1285 ret = 0;
3fb38dfa 1286 goto out_bh;
d759bfa4 1287 }
3fb38dfa
JK		 1288
1289 p = (struct partitionDesc *)bh->b_data;
1290 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1291
bfb257a5 1292 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1293 for (i = 0; i < sbi->s_partitions; i++) {
1294 map = &sbi->s_partmaps[i];
1295 udf_debug("Searching map: (%d == %d)\n",
1296 map->s_partition_num, partitionNumber);
38b74a53
JK		 1297 if (map->s_partition_num == partitionNumber &&
1298 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1299 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1300 break;
1301 }
1302
38b74a53 1303 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1304 udf_debug("Partition (%d) not found in partition map\n",
1305 partitionNumber);
d759bfa4 1306 ret = 0;
3fb38dfa
JK		 1307 goto out_bh;
1308 }
165923fa 1309
3fb38dfa 1310 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1311 if (ret < 0)
1312 goto out_bh;
38b74a53
JK		 1313
1314 /*
bfb257a5
JK		 1315 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1316 * PHYSICAL partitions are already set up
38b74a53
JK		 1317 */
1318 type1_idx = i;
44499602
PF		 1319#ifdef UDFFS_DEBUG
1320 map = NULL; /* supress 'maybe used uninitialized' warning */
1321#endif
38b74a53
JK		 1322 for (i = 0; i < sbi->s_partitions; i++) {
1323 map = &sbi->s_partmaps[i];
1324
1325 if (map->s_partition_num == partitionNumber &&
1326 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1327 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1328 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1329 break;
1330 }
1331
d759bfa4
JK		 1332 if (i >= sbi->s_partitions) {
1333 ret = 0;
38b74a53 1334 goto out_bh;
d759bfa4 1335 }
38b74a53
JK		 1336
1337 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1338 if (ret < 0)
38b74a53
JK		 1339 goto out_bh;
1340
bfb257a5
JK		 1341 if (map->s_partition_type == UDF_METADATA_MAP25) {
1342 ret = udf_load_metadata_files(sb, i);
d759bfa4 1343 if (ret < 0) {
78ace70c
JP		 1344 udf_err(sb, "error loading MetaData partition map %d\n",
1345 i);
bfb257a5
JK		 1346 goto out_bh;
1347 }
1348 } else {
e729eac6
JK		 1349 /*
1350 * If we have a partition with virtual map, we don't handle
1351 * writing to it (we overwrite blocks instead of relocating
1352 * them).
1353 */
1354 if (!(sb->s_flags & MS_RDONLY)) {
1355 ret = -EACCES;
1356 goto out_bh;
1357 }
bfb257a5 1358 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1359 if (ret < 0)
bfb257a5 1360 goto out_bh;
bfb257a5 1361 }
d759bfa4 1362 ret = 0;
c0eb31ed 1363out_bh:
2e0838fd 1364 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1365 brelse(bh);
1366 return ret;
1da177e4
LT		 1367}
1368
1df2ae31
JK		 1369static int udf_load_sparable_map(struct super_block *sb,
1370 struct udf_part_map *map,
1371 struct sparablePartitionMap *spm)
1372{
1373 uint32_t loc;
1374 uint16_t ident;
1375 struct sparingTable *st;
1376 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1377 int i;
1378 struct buffer_head *bh;
1379
1380 map->s_partition_type = UDF_SPARABLE_MAP15;
1381 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1382 if (!is_power_of_2(sdata->s_packet_len)) {
1383 udf_err(sb, "error loading logical volume descriptor: "
1384 "Invalid packet length %u\n",
1385 (unsigned)sdata->s_packet_len);
1386 return -EIO;
1387 }
1388 if (spm->numSparingTables > 4) {
1389 udf_err(sb, "error loading logical volume descriptor: "
1390 "Too many sparing tables (%d)\n",
1391 (int)spm->numSparingTables);
1392 return -EIO;
1393 }
1394
1395 for (i = 0; i < spm->numSparingTables; i++) {
1396 loc = le32_to_cpu(spm->locSparingTable[i]);
1397 bh = udf_read_tagged(sb, loc, loc, &ident);
1398 if (!bh)
1399 continue;
1400
1401 st = (struct sparingTable *)bh->b_data;
1402 if (ident != 0 ||
1403 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1404 strlen(UDF_ID_SPARING)) ||
1405 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1406 sb->s_blocksize) {
1407 brelse(bh);
1408 continue;
1409 }
1410
1411 sdata->s_spar_map[i] = bh;
1412 }
1413 map->s_partition_func = udf_get_pblock_spar15;
1414 return 0;
1415}
1416
c0eb31ed 1417static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1418 struct kernel_lb_addr *fileset)
1da177e4
LT		 1419{
1420 struct logicalVolDesc *lvd;
1df2ae31 1421 int i, offset;
1da177e4 1422 uint8_t type;
6c79e987 1423 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1424 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1425 uint16_t ident;
1426 struct buffer_head *bh;
adee11b2 1427 unsigned int table_len;
d759bfa4 1428 int ret;
1da177e4 1429
c0eb31ed
JK		 1430 bh = udf_read_tagged(sb, block, block, &ident);
1431 if (!bh)
d759bfa4 1432 return -EAGAIN;
c0eb31ed 1433 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1434 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1435 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1436 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1437 udf_err(sb, "error loading logical volume descriptor: "
1438 "Partition table too long (%u > %lu)\n", table_len,
1439 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1440 ret = -EIO;
adee11b2
JK		 1441 goto out_bh;
1442 }
1da177e4 1443
cb14d340
JK		 1444 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1445 if (ret)
c0eb31ed 1446 goto out_bh;
1da177e4 1447
cb00ea35 1448 for (i = 0, offset = 0;
adee11b2 1449 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1450 i++, offset += gpm->partitionMapLength) {
1451 struct udf_part_map *map = &sbi->s_partmaps[i];
1452 gpm = (struct genericPartitionMap *)
1453 &(lvd->partitionMaps[offset]);
1454 type = gpm->partitionMapType;
cb00ea35 1455 if (type == 1) {
4b11111a
MS		 1456 struct genericPartitionMap1 *gpm1 =
1457 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1458 map->s_partition_type = UDF_TYPE1_MAP15;
1459 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1460 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1461 map->s_partition_func = NULL;
cb00ea35 1462 } else if (type == 2) {
4b11111a
MS		 1463 struct udfPartitionMap2 *upm2 =
1464 (struct udfPartitionMap2 *)gpm;
1465 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1466 strlen(UDF_ID_VIRTUAL))) {
1467 u16 suf =
1468 le16_to_cpu(((__le16 *)upm2->partIdent.
1469 identSuffix)[0]);
c82a1275 1470 if (suf < 0x0200) {
4b11111a
MS		 1471 map->s_partition_type =
1472 UDF_VIRTUAL_MAP15;
1473 map->s_partition_func =
1474 udf_get_pblock_virt15;
c82a1275 1475 } else {
4b11111a
MS		 1476 map->s_partition_type =
1477 UDF_VIRTUAL_MAP20;
1478 map->s_partition_func =
1479 udf_get_pblock_virt20;
1da177e4 1480 }
4b11111a
MS		 1481 } else if (!strncmp(upm2->partIdent.ident,
1482 UDF_ID_SPARABLE,
1483 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1484 ret = udf_load_sparable_map(sb, map,
1485 (struct sparablePartitionMap *)gpm);
1486 if (ret < 0)
1df2ae31 1487 goto out_bh;
bfb257a5
JK		 1488 } else if (!strncmp(upm2->partIdent.ident,
1489 UDF_ID_METADATA,
1490 strlen(UDF_ID_METADATA))) {
1491 struct udf_meta_data *mdata =
1492 &map->s_type_specific.s_metadata;
1493 struct metadataPartitionMap *mdm =
1494 (struct metadataPartitionMap *)
1495 &(lvd->partitionMaps[offset]);
a983f368
JP		 1496 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1497 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1498
1499 map->s_partition_type = UDF_METADATA_MAP25;
1500 map->s_partition_func = udf_get_pblock_meta25;
1501
1502 mdata->s_meta_file_loc =
1503 le32_to_cpu(mdm->metadataFileLoc);
1504 mdata->s_mirror_file_loc =
1505 le32_to_cpu(mdm->metadataMirrorFileLoc);
1506 mdata->s_bitmap_file_loc =
1507 le32_to_cpu(mdm->metadataBitmapFileLoc);
1508 mdata->s_alloc_unit_size =
1509 le32_to_cpu(mdm->allocUnitSize);
1510 mdata->s_align_unit_size =
1511 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1512 if (mdm->flags & 0x01)
1513 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1514
1515 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1516 le16_to_cpu(*(__le16 *)
1517 mdm->partIdent.identSuffix));
bfb257a5 1518 udf_debug("Metadata part num=%d\n",
a983f368 1519 le16_to_cpu(mdm->partitionNum));
bfb257a5 1520 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1521 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1522 udf_debug("Metadata file loc=%d\n",
a983f368 1523 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1524 udf_debug("Mirror file loc=%d\n",
a983f368 1525 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1526 udf_debug("Bitmap file loc=%d\n",
a983f368 1527 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1528 udf_debug("Flags: %d %d\n",
1529 mdata->s_flags, mdm->flags);
cb00ea35 1530 } else {
3a71fc5d
MS		 1531 udf_debug("Unknown ident: %s\n",
1532 upm2->partIdent.ident);
1da177e4
LT		 1533 continue;
1534 }
6c79e987
MS		 1535 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1536 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1537 }
1538 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1539 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1540 }
1541
cb00ea35 1542 if (fileset) {
5ca4e4be 1543 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1544
1545 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1546 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1547 fileset->logicalBlockNum,
28de7948 1548 fileset->partitionReferenceNum);
1da177e4
LT		 1549 }
1550 if (lvd->integritySeqExt.extLength)
1551 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1552 ret = 0;
c0eb31ed
JK		 1553out_bh:
1554 brelse(bh);
1555 return ret;
1da177e4
LT		 1556}
1557
1558/*
1559 * udf_load_logicalvolint
1560 *
1561 */
5ca4e4be 1562static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1563{
1564 struct buffer_head *bh = NULL;
1565 uint16_t ident;
6c79e987
MS		 1566 struct udf_sb_info *sbi = UDF_SB(sb);
1567 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1568
1569 while (loc.extLength > 0 &&
cb00ea35
CG		 1570 (bh = udf_read_tagged(sb, loc.extLocation,
1571 loc.extLocation, &ident)) &&
1572 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1573 sbi->s_lvid_bh = bh;
1574 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1575
6c79e987 1576 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1577 udf_load_logicalvolint(sb,
6c79e987 1578 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1579
6c79e987 1580 if (sbi->s_lvid_bh != bh)
3bf25cb4 1581 brelse(bh);
1da177e4 1582 loc.extLength -= sb->s_blocksize;
cb00ea35 1583 loc.extLocation++;
1da177e4 1584 }
6c79e987 1585 if (sbi->s_lvid_bh != bh)
3bf25cb4 1586 brelse(bh);
1da177e4
LT		 1587}
1588
1589/*
d759bfa4
JK		 1590 * Process a main/reserve volume descriptor sequence.
1591 * @block First block of first extent of the sequence.
1592 * @lastblock Lastblock of first extent of the sequence.
1593 * @fileset There we store extent containing root fileset
1da177e4 1594 *
d759bfa4
JK		 1595 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1596 * sequence
1da177e4 1597 */
d759bfa4
JK		 1598static noinline int udf_process_sequence(
1599 struct super_block *sb,
1600 sector_t block, sector_t lastblock,
1601 struct kernel_lb_addr *fileset)
1da177e4
LT		 1602{
1603 struct buffer_head *bh = NULL;
1604 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1605 struct udf_vds_record *curr;
1da177e4
LT		 1606 struct generic_desc *gd;
1607 struct volDescPtr *vdp;
2b8f9421 1608 bool done = false;
1da177e4
LT		 1609 uint32_t vdsn;
1610 uint16_t ident;
1611 long next_s = 0, next_e = 0;
d759bfa4 1612 int ret;
1da177e4
LT		 1613
1614 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1615
c0eb31ed
JK		 1616 /*
1617 * Read the main descriptor sequence and find which descriptors
1618 * are in it.
1619 */
cb00ea35 1620 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1621
1622 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1623 if (!bh) {
78ace70c
JP		 1624 udf_err(sb,
1625 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1626 (unsigned long long)block);
d759bfa4 1627 return -EAGAIN;
c0eb31ed 1628 }
1da177e4
LT		 1629
1630 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1631 gd = (struct generic_desc *)bh->b_data;
1632 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1633 switch (ident) {
28de7948 1634 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1635 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1636 if (vdsn >= curr->volDescSeqNum) {
1637 curr->volDescSeqNum = vdsn;
1638 curr->block = block;
cb00ea35
CG		 1639 }
1640 break;
28de7948 1641 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1642 curr = &vds[VDS_POS_VOL_DESC_PTR];
1643 if (vdsn >= curr->volDescSeqNum) {
1644 curr->volDescSeqNum = vdsn;
1645 curr->block = block;
cb00ea35
CG		 1646
1647 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1648 next_s = le32_to_cpu(
1649 vdp->nextVolDescSeqExt.extLocation);
1650 next_e = le32_to_cpu(
1651 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1652 next_e = next_e >> sb->s_blocksize_bits;
1653 next_e += next_s;
1654 }
1655 break;
28de7948 1656 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1657 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1658 if (vdsn >= curr->volDescSeqNum) {
1659 curr->volDescSeqNum = vdsn;
1660 curr->block = block;
cb00ea35
CG		 1661 }
1662 break;
28de7948 1663 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1664 curr = &vds[VDS_POS_PARTITION_DESC];
1665 if (!curr->block)
1666 curr->block = block;
cb00ea35 1667 break;
28de7948 1668 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1669 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1670 if (vdsn >= curr->volDescSeqNum) {
1671 curr->volDescSeqNum = vdsn;
1672 curr->block = block;
cb00ea35
CG		 1673 }
1674 break;
28de7948 1675 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1676 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1677 if (vdsn >= curr->volDescSeqNum) {
1678 curr->volDescSeqNum = vdsn;
1679 curr->block = block;
cb00ea35
CG		 1680 }
1681 break;
28de7948 1682 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1683 vds[VDS_POS_TERMINATING_DESC].block = block;
1684 if (next_e) {
1685 block = next_s;
1686 lastblock = next_e;
1687 next_s = next_e = 0;
4b11111a 1688 } else
2b8f9421 1689 done = true;
cb00ea35 1690 break;
1da177e4 1691 }
3bf25cb4 1692 brelse(bh);
1da177e4 1693 }
c0eb31ed
JK		 1694 /*
1695 * Now read interesting descriptors again and process them
1696 * in a suitable order
1697 */
1698 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1699 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1700 return -EAGAIN;
1701 }
1702 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1703 if (ret < 0)
1704 return ret;
1705
1706 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1707 ret = udf_load_logicalvol(sb,
1708 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1709 fileset);
1710 if (ret < 0)
1711 return ret;
c0eb31ed 1712 }
165923fa 1713
c0eb31ed
JK		 1714 if (vds[VDS_POS_PARTITION_DESC].block) {
1715 /*
1716 * We rescan the whole descriptor sequence to find
1717 * partition descriptor blocks and process them.
1718 */
1719 for (block = vds[VDS_POS_PARTITION_DESC].block;
1720 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1721 block++) {
1722 ret = udf_load_partdesc(sb, block);
1723 if (ret < 0)
1724 return ret;
1725 }
1da177e4
LT		 1726 }
1727
1728 return 0;
1729}
1730
d759bfa4
JK		 1731/*
1732 * Load Volume Descriptor Sequence described by anchor in bh
1733 *
1734 * Returns <0 on error, 0 on success
1735 */
40346005
JK		 1736static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1737 struct kernel_lb_addr *fileset)
1da177e4 1738{
40346005 1739 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1740 sector_t main_s, main_e, reserve_s, reserve_e;
1741 int ret;
1da177e4 1742
40346005
JK		 1743 anchor = (struct anchorVolDescPtr *)bh->b_data;
1744
1745 /* Locate the main sequence */
1746 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1747 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1748 main_e = main_e >> sb->s_blocksize_bits;
1749 main_e += main_s;
1750
1751 /* Locate the reserve sequence */
1752 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1753 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1754 reserve_e = reserve_e >> sb->s_blocksize_bits;
1755 reserve_e += reserve_s;
1756
1757 /* Process the main & reserve sequences */
1758 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1759 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1760 if (ret != -EAGAIN)
1761 return ret;
bff943af 1762 udf_sb_free_partitions(sb);
d759bfa4
JK		 1763 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1764 if (ret < 0) {
1765 udf_sb_free_partitions(sb);
1766 /* No sequence was OK, return -EIO */
1767 if (ret == -EAGAIN)
1768 ret = -EIO;
1769 }
1770 return ret;
1da177e4
LT		 1771}
1772
40346005
JK		 1773/*
1774 * Check whether there is an anchor block in the given block and
1775 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1776 *
1777 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1778 * block
40346005
JK		 1779 */
1780static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1781 struct kernel_lb_addr *fileset)
1197e4df 1782{
40346005
JK		 1783 struct buffer_head *bh;
1784 uint16_t ident;
1785 int ret;
1197e4df 1786
40346005
JK		 1787 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1788 udf_fixed_to_variable(block) >=
1789 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1790 return -EAGAIN;
40346005
JK		 1791
1792 bh = udf_read_tagged(sb, block, block, &ident);
1793 if (!bh)
d759bfa4 1794 return -EAGAIN;
40346005
JK		 1795 if (ident != TAG_IDENT_AVDP) {
1796 brelse(bh);
d759bfa4 1797 return -EAGAIN;
1197e4df 1798 }
40346005
JK		 1799 ret = udf_load_sequence(sb, bh, fileset);
1800 brelse(bh);
1801 return ret;
1197e4df
CL		 1802}
1803
d759bfa4
JK		 1804/*
1805 * Search for an anchor volume descriptor pointer.
1806 *
1807 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1808 * of anchors.
1809 */
1810static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1811 struct kernel_lb_addr *fileset)
1da177e4 1812{
40346005 1813 sector_t last[6];
38b74a53 1814 int i;
40346005
JK		 1815 struct udf_sb_info *sbi = UDF_SB(sb);
1816 int last_count = 0;
d759bfa4 1817 int ret;
1da177e4 1818
40346005
JK		 1819 /* First try user provided anchor */
1820 if (sbi->s_anchor) {
d759bfa4
JK		 1821 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1822 if (ret != -EAGAIN)
1823 return ret;
40346005
JK		 1824 }
1825 /*
1826 * according to spec, anchor is in either:
1827 * block 256
1828 * lastblock-256
1829 * lastblock
1830 * however, if the disc isn't closed, it could be 512.
1831 */
d759bfa4
JK		 1832 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1833 if (ret != -EAGAIN)
1834 return ret;
40346005
JK		 1835 /*
1836 * The trouble is which block is the last one. Drives often misreport
1837 * this so we try various possibilities.
1838 */
d759bfa4
JK		 1839 last[last_count++] = *lastblock;
1840 if (*lastblock >= 1)
1841 last[last_count++] = *lastblock - 1;
1842 last[last_count++] = *lastblock + 1;
1843 if (*lastblock >= 2)
1844 last[last_count++] = *lastblock - 2;
1845 if (*lastblock >= 150)
1846 last[last_count++] = *lastblock - 150;
1847 if (*lastblock >= 152)
1848 last[last_count++] = *lastblock - 152;
1da177e4 1849
40346005
JK		 1850 for (i = 0; i < last_count; i++) {
1851 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1852 sb->s_blocksize_bits)
28f7c4d4 1853 continue;
d759bfa4
JK		 1854 ret = udf_check_anchor_block(sb, last[i], fileset);
1855 if (ret != -EAGAIN) {
1856 if (!ret)
1857 *lastblock = last[i];
1858 return ret;
1859 }
40346005 1860 if (last[i] < 256)
28f7c4d4 1861 continue;
d759bfa4
JK		 1862 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1863 if (ret != -EAGAIN) {
1864 if (!ret)
1865 *lastblock = last[i];
1866 return ret;
1867 }
40346005 1868 }
28f7c4d4 1869
40346005 1870 /* Finally try block 512 in case media is open */
d759bfa4 1871 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1872}
28f7c4d4 1873
40346005
JK		 1874/*
1875 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1876 * area specified by it. The function expects sbi->s_lastblock to be the last
1877 * block on the media.
1878 *
d759bfa4
JK		 1879 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1880 * was not found.
40346005
JK		 1881 */
1882static int udf_find_anchor(struct super_block *sb,
1883 struct kernel_lb_addr *fileset)
1884{
40346005 1885 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1886 sector_t lastblock = sbi->s_last_block;
1887 int ret;
28f7c4d4 1888
d759bfa4
JK		 1889 ret = udf_scan_anchors(sb, &lastblock, fileset);
1890 if (ret != -EAGAIN)
40346005 1891 goto out;
1da177e4 1892
40346005
JK		 1893 /* No anchor found? Try VARCONV conversion of block numbers */
1894 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1895 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1896 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1897 ret = udf_scan_anchors(sb, &lastblock, fileset);
1898 if (ret != -EAGAIN)
40346005 1899 goto out;
1da177e4 1900
d759bfa4 1901 lastblock = sbi->s_last_block;
40346005 1902 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1903 ret = udf_scan_anchors(sb, &lastblock, fileset);
1904 if (ret < 0) {
40346005
JK		 1905 /* VARCONV didn't help. Clear it. */
1906 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1907 }
40346005 1908out:
d759bfa4
JK		 1909 if (ret == 0)
1910 sbi->s_last_block = lastblock;
1911 return ret;
40346005 1912}
1da177e4 1913
40346005
JK		 1914/*
1915 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1916 * Descriptor Sequence.
1917 *
1918 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1919 * block was not found.
40346005
JK		 1920 */
1921static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1922 int silent, struct kernel_lb_addr *fileset)
1923{
1924 struct udf_sb_info *sbi = UDF_SB(sb);
1925 loff_t nsr_off;
d759bfa4 1926 int ret;
40346005
JK		 1927
1928 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1929 if (!silent)
78ace70c 1930 udf_warn(sb, "Bad block size\n");
d759bfa4 1931 return -EINVAL;
40346005
JK		 1932 }
1933 sbi->s_last_block = uopt->lastblock;
1934 if (!uopt->novrs) {
1935 /* Check that it is NSR02 compliant */
1936 nsr_off = udf_check_vsd(sb);
1937 if (!nsr_off) {
1938 if (!silent)
78ace70c 1939 udf_warn(sb, "No VRS found\n");
40346005
JK		 1940 return 0;
1941 }
1942 if (nsr_off == -1)
44499602
PF		 1943 udf_debug("Failed to read sector at offset %d. "
1944 "Assuming open disc. Skipping validity "
1945 "check\n", VSD_FIRST_SECTOR_OFFSET);
40346005
JK		 1946 if (!sbi->s_last_block)
1947 sbi->s_last_block = udf_get_last_block(sb);
1948 } else {
1949 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1950 }
1da177e4 1951
40346005
JK		 1952 /* Look for anchor block and load Volume Descriptor Sequence */
1953 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1954 ret = udf_find_anchor(sb, fileset);
1955 if (ret < 0) {
1956 if (!silent && ret == -EAGAIN)
78ace70c 1957 udf_warn(sb, "No anchor found\n");
d759bfa4 1958 return ret;
40346005 1959 }
d759bfa4 1960 return 0;
1da177e4
LT		 1961}
1962
1963static void udf_open_lvid(struct super_block *sb)
1964{
6c79e987
MS		 1965 struct udf_sb_info *sbi = UDF_SB(sb);
1966 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1967 struct logicalVolIntegrityDesc *lvid;
1968 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1969
165923fa
MS		 1970 if (!bh)
1971 return;
165923fa 1972 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
69d75671
JK		 1973 lvidiu = udf_sb_lvidiu(sb);
1974 if (!lvidiu)
1975 return;
165923fa 1976
69d75671 1977 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1978 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1979 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1980 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1981 CURRENT_TIME);
146bca72 1982 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1983
1984 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1985 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1986 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1987
1988 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1989 mark_buffer_dirty(bh);
146bca72 1990 sbi->s_lvid_dirty = 0;
949f4a7c 1991 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1992 /* Make opening of filesystem visible on the media immediately */
1993 sync_dirty_buffer(bh);
1da177e4
LT		 1994}
1995
1996static void udf_close_lvid(struct super_block *sb)
1997{
6c79e987
MS		 1998 struct udf_sb_info *sbi = UDF_SB(sb);
1999 struct buffer_head *bh = sbi->s_lvid_bh;
2000 struct logicalVolIntegrityDesc *lvid;
165923fa 2001 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 2002
6c79e987
MS		 2003 if (!bh)
2004 return;
69d75671
JK		 2005 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2006 lvidiu = udf_sb_lvidiu(sb);
2007 if (!lvidiu)
2008 return;
6c79e987 2009
949f4a7c 2010 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 2011 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2012 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2013 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
2014 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2015 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2016 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2017 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2018 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2019 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2020 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2021
2022 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 2023 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 2024 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 2025
2026 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 2027 /*
2028 * We set buffer uptodate unconditionally here to avoid spurious
2029 * warnings from mark_buffer_dirty() when previous EIO has marked
2030 * the buffer as !uptodate
2031 */
2032 set_buffer_uptodate(bh);
165923fa 2033 mark_buffer_dirty(bh);
146bca72 2034 sbi->s_lvid_dirty = 0;
949f4a7c 2035 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2036 /* Make closing of filesystem visible on the media immediately */
2037 sync_dirty_buffer(bh);
1da177e4
LT		 2038}
2039
d664b6af
JK		 2040u64 lvid_get_unique_id(struct super_block *sb)
2041{
2042 struct buffer_head *bh;
2043 struct udf_sb_info *sbi = UDF_SB(sb);
2044 struct logicalVolIntegrityDesc *lvid;
2045 struct logicalVolHeaderDesc *lvhd;
2046 u64 uniqueID;
2047 u64 ret;
2048
2049 bh = sbi->s_lvid_bh;
2050 if (!bh)
2051 return 0;
2052
2053 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2054 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2055
2056 mutex_lock(&sbi->s_alloc_mutex);
2057 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2058 if (!(++uniqueID & 0xFFFFFFFF))
2059 uniqueID += 16;
2060 lvhd->uniqueID = cpu_to_le64(uniqueID);
2061 mutex_unlock(&sbi->s_alloc_mutex);
2062 mark_buffer_dirty(bh);
2063
2064 return ret;
1da177e4
LT		 2065}
2066
1da177e4
LT		 2067static int udf_fill_super(struct super_block *sb, void *options, int silent)
2068{
d759bfa4 2069 int ret = -EINVAL;
cb00ea35 2070 struct inode *inode = NULL;
1da177e4 2071 struct udf_options uopt;
5ca4e4be 2072 struct kernel_lb_addr rootdir, fileset;
1da177e4 2073 struct udf_sb_info *sbi;
9181f8bf 2074 bool lvid_open = false;
1da177e4
LT		 2075
2076 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2077 uopt.uid = INVALID_UID;
2078 uopt.gid = INVALID_GID;
1da177e4 2079 uopt.umask = 0;
87bc730c
MS		 2080 uopt.fmode = UDF_INVALID_MODE;
2081 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2082
6c79e987 2083 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2084 if (!sbi)
1da177e4 2085 return -ENOMEM;
28de7948 2086
1da177e4 2087 sb->s_fs_info = sbi;
1da177e4 2088
1e7933de 2089 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2090
6da80894 2091 if (!udf_parse_options((char *)options, &uopt, false))
fdf2657b 2092 goto parse_options_failure;
1da177e4
LT		 2093
2094 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2095 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2096 udf_err(sb, "utf8 cannot be combined with iocharset\n");
fdf2657b 2097 goto parse_options_failure;
1da177e4
LT		 2098 }
2099#ifdef CONFIG_UDF_NLS
cb00ea35 2100 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2101 uopt.nls_map = load_nls_default();
2102 if (!uopt.nls_map)
2103 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2104 else
2105 udf_debug("Using default NLS map\n");
2106 }
2107#endif
2108 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2109 uopt.flags |= (1 << UDF_FLAG_UTF8);
2110
2111 fileset.logicalBlockNum = 0xFFFFFFFF;
2112 fileset.partitionReferenceNum = 0xFFFF;
2113
6c79e987
MS		 2114 sbi->s_flags = uopt.flags;
2115 sbi->s_uid = uopt.uid;
2116 sbi->s_gid = uopt.gid;
2117 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2118 sbi->s_fmode = uopt.fmode;
2119 sbi->s_dmode = uopt.dmode;
6c79e987 2120 sbi->s_nls_map = uopt.nls_map;
c03cad24 2121 rwlock_init(&sbi->s_cred_lock);
1da177e4 2122
cb00ea35 2123 if (uopt.session == 0xFFFFFFFF)
6c79e987 2124 sbi->s_session = udf_get_last_session(sb);
1da177e4 2125 else
6c79e987 2126 sbi->s_session = uopt.session;
1da177e4 2127
6c79e987 2128 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2129
40346005
JK		 2130 /* Fill in the rest of the superblock */
2131 sb->s_op = &udf_sb_ops;
2132 sb->s_export_op = &udf_export_ops;
123e9caf 2133
40346005
JK		 2134 sb->s_magic = UDF_SUPER_MAGIC;
2135 sb->s_time_gran = 1000;
2136
1197e4df 2137 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2138 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2139 } else {
e1defc4f 2140 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2141 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2142 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2143 if (!silent)
78ace70c
JP		 2144 pr_notice("Rescanning with blocksize %d\n",
2145 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2146 brelse(sbi->s_lvid_bh);
2147 sbi->s_lvid_bh = NULL;
1197e4df 2148 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2149 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2150 }
1da177e4 2151 }
d759bfa4
JK		 2152 if (ret < 0) {
2153 if (ret == -EAGAIN) {
2154 udf_warn(sb, "No partition found (1)\n");
2155 ret = -EINVAL;
2156 }
1da177e4
LT		 2157 goto error_out;
2158 }
2159
6c79e987 2160 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2161
6c79e987 2162 if (sbi->s_lvid_bh) {
4b11111a 2163 struct logicalVolIntegrityDescImpUse *lvidiu =
69d75671
JK		 2164 udf_sb_lvidiu(sb);
2165 uint16_t minUDFReadRev;
2166 uint16_t minUDFWriteRev;
1da177e4 2167
69d75671
JK		 2168 if (!lvidiu) {
2169 ret = -EINVAL;
2170 goto error_out;
2171 }
2172 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2173 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
cb00ea35 2174 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c 2175 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
69d75671 2176 minUDFReadRev,
78ace70c 2177 UDF_MAX_READ_VERSION);
d759bfa4 2178 ret = -EINVAL;
1da177e4 2179 goto error_out;
e729eac6
JK		 2180 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2181 !(sb->s_flags & MS_RDONLY)) {
2182 ret = -EACCES;
2183 goto error_out;
2184 }
1da177e4 2185
6c79e987 2186 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2187
2188 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2189 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2190 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2191 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2192 }
2193
6c79e987 2194 if (!sbi->s_partitions) {
78ace70c 2195 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2196 ret = -EINVAL;
1da177e4
LT		 2197 goto error_out;
2198 }
2199
4b11111a 2200 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
e729eac6
JK		 2201 UDF_PART_FLAG_READ_ONLY &&
2202 !(sb->s_flags & MS_RDONLY)) {
2203 ret = -EACCES;
2204 goto error_out;
c1a26e7d 2205 }
39b3f6d6 2206
cb00ea35 2207 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2208 udf_warn(sb, "No fileset found\n");
d759bfa4 2209 ret = -EINVAL;
1da177e4
LT		 2210 goto error_out;
2211 }
2212
cb00ea35 2213 if (!silent) {
5ca4e4be 2214 struct timestamp ts;
56774805 2215 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2216 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2217 sbi->s_volume_ident,
2218 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2219 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4 2220 }
9181f8bf 2221 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4 2222 udf_open_lvid(sb);
9181f8bf
JK		 2223 lvid_open = true;
2224 }
1da177e4
LT		 2225
2226 /* Assign the root inode */
2227 /* assign inodes by physical block number */
2228 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2229 inode = udf_iget(sb, &rootdir);
6d3d5e86 2230 if (IS_ERR(inode)) {
78ace70c 2231 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2232 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
6d3d5e86 2233 ret = PTR_ERR(inode);
1da177e4
LT		 2234 goto error_out;
2235 }
2236
2237 /* Allocate a dentry for the root inode */
48fde701 2238 sb->s_root = d_make_root(inode);
cb00ea35 2239 if (!sb->s_root) {
78ace70c 2240 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2241 ret = -ENOMEM;
1da177e4
LT		 2242 goto error_out;
2243 }
31170b6a 2244 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2245 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2246 return 0;
2247
28de7948 2248error_out:
0d454e4a 2249 iput(sbi->s_vat_inode);
fdf2657b 2250parse_options_failure:
1da177e4
LT		 2251#ifdef CONFIG_UDF_NLS
2252 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2253 unload_nls(sbi->s_nls_map);
1da177e4 2254#endif
9181f8bf 2255 if (lvid_open)
1da177e4 2256 udf_close_lvid(sb);
6c79e987 2257 brelse(sbi->s_lvid_bh);
bff943af 2258 udf_sb_free_partitions(sb);
1da177e4
LT		 2259 kfree(sbi);
2260 sb->s_fs_info = NULL;
28de7948 2261
d759bfa4 2262 return ret;
1da177e4
LT		 2263}
2264
8076c363
JP		 2265void _udf_err(struct super_block *sb, const char *function,
2266 const char *fmt, ...)
1da177e4 2267{
c2bff36c 2268 struct va_format vaf;
1da177e4
LT		 2269 va_list args;
2270
1da177e4 2271 va_start(args, fmt);
c2bff36c
JP		 2272
2273 vaf.fmt = fmt;
2274 vaf.va = &args;
2275
2276 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2277
1da177e4 2278 va_end(args);
1da177e4
LT		 2279}
2280
a40ecd7b
JP		 2281void _udf_warn(struct super_block *sb, const char *function,
2282 const char *fmt, ...)
1da177e4 2283{
c2bff36c 2284 struct va_format vaf;
1da177e4
LT		 2285 va_list args;
2286
cb00ea35 2287 va_start(args, fmt);
c2bff36c
JP		 2288
2289 vaf.fmt = fmt;
2290 vaf.va = &args;
2291
2292 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2293
1da177e4 2294 va_end(args);
1da177e4
LT		 2295}
2296
cb00ea35 2297static void udf_put_super(struct super_block *sb)
1da177e4 2298{
6c79e987 2299 struct udf_sb_info *sbi;
1da177e4 2300
6c79e987 2301 sbi = UDF_SB(sb);
6cfd0148 2302
0d454e4a 2303 iput(sbi->s_vat_inode);
1da177e4
LT		 2304#ifdef CONFIG_UDF_NLS
2305 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2306 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2307#endif
2308 if (!(sb->s_flags & MS_RDONLY))
2309 udf_close_lvid(sb);
6c79e987 2310 brelse(sbi->s_lvid_bh);
bff943af 2311 udf_sb_free_partitions(sb);
bbe48dd8 2312 mutex_destroy(&sbi->s_alloc_mutex);
1da177e4
LT		 2313 kfree(sb->s_fs_info);
2314 sb->s_fs_info = NULL;
2315}
2316
146bca72
JK		 2317static int udf_sync_fs(struct super_block *sb, int wait)
2318{
2319 struct udf_sb_info *sbi = UDF_SB(sb);
2320
2321 mutex_lock(&sbi->s_alloc_mutex);
2322 if (sbi->s_lvid_dirty) {
2323 /*
2324 * Blockdevice will be synced later so we don't have to submit
2325 * the buffer for IO
2326 */
2327 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2328 sbi->s_lvid_dirty = 0;
2329 }
2330 mutex_unlock(&sbi->s_alloc_mutex);
2331
2332 return 0;
2333}
2334
cb00ea35 2335static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2336{
726c3342 2337 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2338 struct udf_sb_info *sbi = UDF_SB(sb);
2339 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2340 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987 2341
69d75671 2342 lvidiu = udf_sb_lvidiu(sb);
1da177e4
LT		 2343 buf->f_type = UDF_SUPER_MAGIC;
2344 buf->f_bsize = sb->s_blocksize;
6c79e987 2345 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2346 buf->f_bfree = udf_count_free(sb);
2347 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2348 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2349 le32_to_cpu(lvidiu->numDirs)) : 0)
2350 + buf->f_bfree;
1da177e4 2351 buf->f_ffree = buf->f_bfree;
cb00ea35 2352 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2353 buf->f_fsid.val[0] = (u32)id;
2354 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2355
2356 return 0;
2357}
2358
4b11111a
MS		 2359static unsigned int udf_count_free_bitmap(struct super_block *sb,
2360 struct udf_bitmap *bitmap)
1da177e4
LT		 2361{
2362 struct buffer_head *bh = NULL;
2363 unsigned int accum = 0;
2364 int index;
2365 int block = 0, newblock;
5ca4e4be 2366 struct kernel_lb_addr loc;
1da177e4 2367 uint32_t bytes;
1da177e4
LT		 2368 uint8_t *ptr;
2369 uint16_t ident;
2370 struct spaceBitmapDesc *bm;
2371
1da177e4 2372 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2373 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2374 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2375
cb00ea35 2376 if (!bh) {
78ace70c 2377 udf_err(sb, "udf_count_free failed\n");
1da177e4 2378 goto out;
cb00ea35 2379 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2380 brelse(bh);
78ace70c 2381 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2382 goto out;
2383 }
2384
2385 bm = (struct spaceBitmapDesc *)bh->b_data;
2386 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2387 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2388 ptr = (uint8_t *)bh->b_data;
1da177e4 2389
cb00ea35 2390 while (bytes > 0) {
01b954a3
MS		 2391 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2392 accum += bitmap_weight((const unsigned long *)(ptr + index),
2393 cur_bytes * 8);
2394 bytes -= cur_bytes;
cb00ea35 2395 if (bytes) {
3bf25cb4 2396 brelse(bh);
97e961fd 2397 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2398 bh = udf_tread(sb, newblock);
cb00ea35 2399 if (!bh) {
1da177e4
LT		 2400 udf_debug("read failed\n");
2401 goto out;
2402 }
2403 index = 0;
28de7948 2404 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2405 }
2406 }
3bf25cb4 2407 brelse(bh);
28de7948 2408out:
1da177e4
LT		 2409 return accum;
2410}
2411
4b11111a
MS		 2412static unsigned int udf_count_free_table(struct super_block *sb,
2413 struct inode *table)
1da177e4
LT		 2414{
2415 unsigned int accum = 0;
ff116fc8 2416 uint32_t elen;
5ca4e4be 2417 struct kernel_lb_addr eloc;
1da177e4 2418 int8_t etype;
ff116fc8 2419 struct extent_position epos;
1da177e4 2420
d1668fe3 2421 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2422 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2423 epos.offset = sizeof(struct unallocSpaceEntry);
2424 epos.bh = NULL;
1da177e4 2425
3a71fc5d 2426 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2427 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2428
3bf25cb4 2429 brelse(epos.bh);
d1668fe3 2430 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2431
2432 return accum;
2433}
cb00ea35
CG		 2434
2435static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2436{
2437 unsigned int accum = 0;
6c79e987
MS		 2438 struct udf_sb_info *sbi;
2439 struct udf_part_map *map;
1da177e4 2440
6c79e987
MS		 2441 sbi = UDF_SB(sb);
2442 if (sbi->s_lvid_bh) {
4b11111a
MS		 2443 struct logicalVolIntegrityDesc *lvid =
2444 (struct logicalVolIntegrityDesc *)
2445 sbi->s_lvid_bh->b_data;
6c79e987 2446 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2447 accum = le32_to_cpu(
2448 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2449 if (accum == 0xFFFFFFFF)
2450 accum = 0;
2451 }
2452 }
2453
2454 if (accum)
2455 return accum;
2456
6c79e987
MS		 2457 map = &sbi->s_partmaps[sbi->s_partition];
2458 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2459 accum += udf_count_free_bitmap(sb,
6c79e987 2460 map->s_uspace.s_bitmap);
1da177e4 2461 }
6c79e987 2462 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2463 accum += udf_count_free_bitmap(sb,
6c79e987 2464 map->s_fspace.s_bitmap);
1da177e4
LT		 2465 }
2466 if (accum)
2467 return accum;
2468
6c79e987 2469 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2470 accum += udf_count_free_table(sb,
6c79e987 2471 map->s_uspace.s_table);
1da177e4 2472 }
6c79e987 2473 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2474 accum += udf_count_free_table(sb,
6c79e987 2475 map->s_fspace.s_table);
1da177e4
LT		 2476 }
2477
2478 return accum;
2479}
Linux kernel - Deliverables
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