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udf: Add __init macro to init_inodecache
[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/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
44499602
PF		 79#define VSD_FIRST_SECTOR_OFFSET 32768
80#define VSD_MAX_SECTOR_OFFSET 0x800000
81
8de52778
AV		 82enum { UDF_MAX_LINKS = 0xffff };
83
1da177e4
LT		 84/* These are the "meat" - everything else is stuffing */
85static int udf_fill_super(struct super_block *, void *, int);
86static void udf_put_super(struct super_block *);
146bca72 87static int udf_sync_fs(struct super_block *, int);
1da177e4 88static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 89static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 90static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
91 struct kernel_lb_addr *);
cb00ea35 92static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 93 struct kernel_lb_addr *);
1da177e4
LT		 94static void udf_open_lvid(struct super_block *);
95static void udf_close_lvid(struct super_block *);
96static unsigned int udf_count_free(struct super_block *);
726c3342 97static int udf_statfs(struct dentry *, struct kstatfs *);
34c80b1d 98static int udf_show_options(struct seq_file *, struct dentry *);
1da177e4 99
69d75671 100struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
6c79e987 101{
69d75671
JK		 102 struct logicalVolIntegrityDesc *lvid;
103 unsigned int partnum;
104 unsigned int offset;
105
106 if (!UDF_SB(sb)->s_lvid_bh)
107 return NULL;
108 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
109 partnum = le32_to_cpu(lvid->numOfPartitions);
110 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
111 offsetof(struct logicalVolIntegrityDesc, impUse)) /
112 (2 * sizeof(uint32_t)) < partnum) {
113 udf_err(sb, "Logical volume integrity descriptor corrupted "
114 "(numOfPartitions = %u)!\n", partnum);
115 return NULL;
116 }
117 /* The offset is to skip freeSpaceTable and sizeTable arrays */
118 offset = partnum * 2 * sizeof(uint32_t);
6c79e987
MS		 119 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
120}
121
1da177e4 122/* UDF filesystem type */
152a0836
AV		 123static struct dentry *udf_mount(struct file_system_type *fs_type,
124 int flags, const char *dev_name, void *data)
1da177e4 125{
152a0836 126 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 127}
128
129static struct file_system_type udf_fstype = {
28de7948
CG		 130 .owner = THIS_MODULE,
131 .name = "udf",
152a0836 132 .mount = udf_mount,
28de7948
CG		 133 .kill_sb = kill_block_super,
134 .fs_flags = FS_REQUIRES_DEV,
1da177e4 135};
3e64fe5b 136MODULE_ALIAS_FS("udf");
1da177e4 137
cb00ea35 138static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 139
140static struct inode *udf_alloc_inode(struct super_block *sb)
141{
142 struct udf_inode_info *ei;
3a71fc5d 143 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 144 if (!ei)
145 return NULL;
95f8797f
DB		 146
147 ei->i_unique = 0;
148 ei->i_lenExtents = 0;
149 ei->i_next_alloc_block = 0;
150 ei->i_next_alloc_goal = 0;
151 ei->i_strat4096 = 0;
4d0fb621 152 init_rwsem(&ei->i_data_sem);
99600051
NJ		 153 ei->cached_extent.lstart = -1;
154 spin_lock_init(&ei->i_extent_cache_lock);
95f8797f 155
1da177e4
LT		 156 return &ei->vfs_inode;
157}
158
fa0d7e3d 159static void udf_i_callback(struct rcu_head *head)
1da177e4 160{
fa0d7e3d 161 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 162 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
163}
164
fa0d7e3d
NP		 165static void udf_destroy_inode(struct inode *inode)
166{
167 call_rcu(&inode->i_rcu, udf_i_callback);
168}
169
51cc5068 170static void init_once(void *foo)
1da177e4 171{
cb00ea35 172 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 173
a35afb83
CL		 174 ei->i_ext.i_data = NULL;
175 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 176}
177
53ea18de 178static int __init init_inodecache(void)
1da177e4
LT		 179{
180 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
181 sizeof(struct udf_inode_info),
cb00ea35
CG		 182 0, (SLAB_RECLAIM_ACCOUNT |
183 SLAB_MEM_SPREAD),
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
69d75671
JK		 653 if (lvidiu) {
654 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
e729eac6
JK		 655 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
656 return -EACCES;
657 }
658
6c79e987
MS		 659 uopt.flags = sbi->s_flags;
660 uopt.uid = sbi->s_uid;
661 uopt.gid = sbi->s_gid;
662 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 663 uopt.fmode = sbi->s_fmode;
664 uopt.dmode = sbi->s_dmode;
1da177e4 665
6da80894 666 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 667 return -EINVAL;
668
c03cad24 669 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 670 sbi->s_flags = uopt.flags;
671 sbi->s_uid = uopt.uid;
672 sbi->s_gid = uopt.gid;
673 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 674 sbi->s_fmode = uopt.fmode;
675 sbi->s_dmode = uopt.dmode;
c03cad24 676 write_unlock(&sbi->s_cred_lock);
1da177e4 677
c79d967d
CH		 678 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
679 goto out_unlock;
680
36350462 681 if (*flags & MS_RDONLY)
1da177e4 682 udf_close_lvid(sb);
36350462 683 else
1da177e4
LT		 684 udf_open_lvid(sb);
685
c79d967d 686out_unlock:
c79d967d 687 return error;
1da177e4
LT		 688}
689
40346005
JK		 690/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
691/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
692static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 693{
694 struct volStructDesc *vsd = NULL;
44499602 695 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
1da177e4
LT		 696 int sectorsize;
697 struct buffer_head *bh = NULL;
cb00ea35
CG		 698 int nsr02 = 0;
699 int nsr03 = 0;
6c79e987 700 struct udf_sb_info *sbi;
1da177e4 701
6c79e987 702 sbi = UDF_SB(sb);
1da177e4
LT		 703 if (sb->s_blocksize < sizeof(struct volStructDesc))
704 sectorsize = sizeof(struct volStructDesc);
705 else
706 sectorsize = sb->s_blocksize;
707
6c79e987 708 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 709
710 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 711 (unsigned int)(sector >> sb->s_blocksize_bits),
712 sb->s_blocksize);
44499602
PF		 713 /* Process the sequence (if applicable). The hard limit on the sector
714 * offset is arbitrary, hopefully large enough so that all valid UDF
715 * filesystems will be recognised. There is no mention of an upper
716 * bound to the size of the volume recognition area in the standard.
717 * The limit will prevent the code to read all the sectors of a
718 * specially crafted image (like a bluray disc full of CD001 sectors),
719 * potentially causing minutes or even hours of uninterruptible I/O
720 * activity. This actually happened with uninitialised SSD partitions
721 * (all 0xFF) before the check for the limit and all valid IDs were
722 * added */
723 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
724 sector += sectorsize) {
1da177e4
LT		 725 /* Read a block */
726 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
727 if (!bh)
728 break;
729
730 /* Look for ISO descriptors */
731 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 732 (sector & (sb->s_blocksize - 1)));
1da177e4 733
44499602 734 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
3a71fc5d 735 VSD_STD_ID_LEN)) {
cb00ea35
CG		 736 switch (vsd->structType) {
737 case 0:
738 udf_debug("ISO9660 Boot Record found\n");
739 break;
740 case 1:
a983f368 741 udf_debug("ISO9660 Primary Volume Descriptor found\n");
cb00ea35
CG		 742 break;
743 case 2:
a983f368 744 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
cb00ea35
CG		 745 break;
746 case 3:
a983f368 747 udf_debug("ISO9660 Volume Partition Descriptor found\n");
cb00ea35
CG		 748 break;
749 case 255:
a983f368 750 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
cb00ea35
CG		 751 break;
752 default:
753 udf_debug("ISO9660 VRS (%u) found\n",
754 vsd->structType);
755 break;
1da177e4 756 }
3a71fc5d
MS		 757 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
758 VSD_STD_ID_LEN))
759 ; /* nothing */
760 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
761 VSD_STD_ID_LEN)) {
3bf25cb4 762 brelse(bh);
1da177e4 763 break;
3a71fc5d
MS		 764 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
765 VSD_STD_ID_LEN))
1da177e4 766 nsr02 = sector;
3a71fc5d
MS		 767 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
768 VSD_STD_ID_LEN))
1da177e4 769 nsr03 = sector;
44499602
PF		 770 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
771 VSD_STD_ID_LEN))
772 ; /* nothing */
773 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
774 VSD_STD_ID_LEN))
775 ; /* nothing */
776 else {
777 /* invalid id : end of volume recognition area */
778 brelse(bh);
779 break;
780 }
3bf25cb4 781 brelse(bh);
1da177e4
LT		 782 }
783
784 if (nsr03)
785 return nsr03;
786 else if (nsr02)
787 return nsr02;
44499602
PF		 788 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
789 VSD_FIRST_SECTOR_OFFSET)
1da177e4
LT		 790 return -1;
791 else
792 return 0;
793}
794
3a71fc5d 795static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 796 struct kernel_lb_addr *fileset,
797 struct kernel_lb_addr *root)
1da177e4
LT		 798{
799 struct buffer_head *bh = NULL;
800 long lastblock;
801 uint16_t ident;
6c79e987 802 struct udf_sb_info *sbi;
1da177e4
LT		 803
804 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 805 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 806 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 807
28de7948 808 if (!bh) {
1da177e4 809 return 1;
28de7948 810 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 811 brelse(bh);
1da177e4
LT		 812 return 1;
813 }
cb00ea35 814
1da177e4
LT		 815 }
816
6c79e987 817 sbi = UDF_SB(sb);
3a71fc5d
MS		 818 if (!bh) {
819 /* Search backwards through the partitions */
5ca4e4be 820 struct kernel_lb_addr newfileset;
1da177e4 821
28de7948 822/* --> cvg: FIXME - is it reasonable? */
1da177e4 823 return 1;
cb00ea35 824
6c79e987 825 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 826 (newfileset.partitionReferenceNum != 0xFFFF &&
827 fileset->logicalBlockNum == 0xFFFFFFFF &&
828 fileset->partitionReferenceNum == 0xFFFF);
829 newfileset.partitionReferenceNum--) {
6c79e987
MS		 830 lastblock = sbi->s_partmaps
831 [newfileset.partitionReferenceNum]
832 .s_partition_len;
1da177e4
LT		 833 newfileset.logicalBlockNum = 0;
834
cb00ea35 835 do {
97e961fd 836 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 837 &ident);
cb00ea35
CG		 838 if (!bh) {
839 newfileset.logicalBlockNum++;
1da177e4
LT		 840 continue;
841 }
842
cb00ea35
CG		 843 switch (ident) {
844 case TAG_IDENT_SBD:
28de7948
CG		 845 {
846 struct spaceBitmapDesc *sp;
4b11111a
MS		 847 sp = (struct spaceBitmapDesc *)
848 bh->b_data;
28de7948
CG		 849 newfileset.logicalBlockNum += 1 +
850 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 851 sizeof(struct spaceBitmapDesc)
852 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 853 brelse(bh);
854 break;
855 }
cb00ea35 856 case TAG_IDENT_FSD:
28de7948
CG		 857 *fileset = newfileset;
858 break;
cb00ea35 859 default:
28de7948
CG		 860 newfileset.logicalBlockNum++;
861 brelse(bh);
862 bh = NULL;
863 break;
1da177e4 864 }
28de7948
CG		 865 } while (newfileset.logicalBlockNum < lastblock &&
866 fileset->logicalBlockNum == 0xFFFFFFFF &&
867 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 868 }
869 }
870
871 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 872 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 873 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 874 fileset->logicalBlockNum,
875 fileset->partitionReferenceNum);
1da177e4 876
6c79e987 877 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 878 udf_load_fileset(sb, bh, root);
3bf25cb4 879 brelse(bh);
1da177e4
LT		 880 return 0;
881 }
882 return 1;
883}
884
d759bfa4
JK		 885/*
886 * Load primary Volume Descriptor Sequence
887 *
888 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
889 * should be tried.
890 */
c0eb31ed 891static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 892{
893 struct primaryVolDesc *pvoldesc;
ba9aadd8 894 struct ustr *instr, *outstr;
c0eb31ed
JK		 895 struct buffer_head *bh;
896 uint16_t ident;
d759bfa4 897 int ret = -ENOMEM;
ba9aadd8
MS		 898
899 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
900 if (!instr)
d759bfa4 901 return -ENOMEM;
ba9aadd8
MS		 902
903 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
904 if (!outstr)
905 goto out1;
c0eb31ed
JK		 906
907 bh = udf_read_tagged(sb, block, block, &ident);
d759bfa4
JK		 908 if (!bh) {
909 ret = -EAGAIN;
ba9aadd8 910 goto out2;
d759bfa4 911 }
ba9aadd8 912
d759bfa4
JK		 913 if (ident != TAG_IDENT_PVD) {
914 ret = -EIO;
915 goto out_bh;
916 }
1da177e4
LT		 917
918 pvoldesc = (struct primaryVolDesc *)bh->b_data;
919
56774805
MS		 920 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
921 pvoldesc->recordingDateAndTime)) {
af15a298 922#ifdef UDFFS_DEBUG
5ca4e4be 923 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
a983f368 924 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
af15a298
MS		 925 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
926 ts->minute, le16_to_cpu(ts->typeAndTimezone));
927#endif
1da177e4
LT		 928 }
929
ba9aadd8
MS		 930 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
931 if (udf_CS0toUTF8(outstr, instr)) {
932 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
933 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a 934 udf_debug("volIdent[] = '%s'\n",
a983f368 935 UDF_SB(sb)->s_volume_ident);
1da177e4 936 }
1da177e4 937
ba9aadd8
MS		 938 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
939 if (udf_CS0toUTF8(outstr, instr))
940 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed 941
ba9aadd8 942 ret = 0;
d759bfa4
JK		 943out_bh:
944 brelse(bh);
ba9aadd8
MS		 945out2:
946 kfree(outstr);
947out1:
948 kfree(instr);
949 return ret;
1da177e4
LT		 950}
951
3080a74e
NJ		 952struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
953 u32 meta_file_loc, u32 partition_num)
954{
955 struct kernel_lb_addr addr;
956 struct inode *metadata_fe;
957
958 addr.logicalBlockNum = meta_file_loc;
959 addr.partitionReferenceNum = partition_num;
960
961 metadata_fe = udf_iget(sb, &addr);
962
963 if (metadata_fe == NULL)
964 udf_warn(sb, "metadata inode efe not found\n");
965 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
966 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
967 iput(metadata_fe);
968 metadata_fe = NULL;
969 }
970
971 return metadata_fe;
972}
973
bfb257a5
JK		 974static int udf_load_metadata_files(struct super_block *sb, int partition)
975{
976 struct udf_sb_info *sbi = UDF_SB(sb);
977 struct udf_part_map *map;
978 struct udf_meta_data *mdata;
5ca4e4be 979 struct kernel_lb_addr addr;
bfb257a5
JK		 980
981 map = &sbi->s_partmaps[partition];
982 mdata = &map->s_type_specific.s_metadata;
983
984 /* metadata address */
bfb257a5 985 udf_debug("Metadata file location: block = %d part = %d\n",
3080a74e 986 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5 987
3080a74e
NJ		 988 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
989 mdata->s_meta_file_loc, map->s_partition_num);
bfb257a5
JK		 990
991 if (mdata->s_metadata_fe == NULL) {
3080a74e
NJ		 992 /* mirror file entry */
993 udf_debug("Mirror metadata file location: block = %d part = %d\n",
994 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 995
3080a74e
NJ		 996 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
997 mdata->s_mirror_file_loc, map->s_partition_num);
bfb257a5 998
3080a74e
NJ		 999 if (mdata->s_mirror_fe == NULL) {
1000 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
d759bfa4 1001 return -EIO;
3080a74e 1002 }
bfb257a5
JK		 1003 }
1004
1005 /*
1006 * bitmap file entry
1007 * Note:
1008 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1009 */
1010 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1011 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1012 addr.partitionReferenceNum = map->s_partition_num;
1013
1014 udf_debug("Bitmap file location: block = %d part = %d\n",
a983f368 1015 addr.logicalBlockNum, addr.partitionReferenceNum);
bfb257a5 1016
97e961fd 1017 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 1018 if (mdata->s_bitmap_fe == NULL) {
1019 if (sb->s_flags & MS_RDONLY)
a40ecd7b 1020 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 1021 else {
8076c363 1022 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
d759bfa4 1023 return -EIO;
bfb257a5
JK		 1024 }
1025 }
1026 }
1027
1028 udf_debug("udf_load_metadata_files Ok\n");
bfb257a5 1029 return 0;
bfb257a5
JK		 1030}
1031
28de7948 1032static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1033 struct kernel_lb_addr *root)
1da177e4
LT		 1034{
1035 struct fileSetDesc *fset;
1036
1037 fset = (struct fileSetDesc *)bh->b_data;
1038
1039 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1040
6c79e987 1041 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1042
cb00ea35
CG		 1043 udf_debug("Rootdir at block=%d, partition=%d\n",
1044 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1045}
1046
883cb9d1
MS		 1047int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1048{
1049 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1050 return DIV_ROUND_UP(map->s_partition_len +
1051 (sizeof(struct spaceBitmapDesc) << 3),
1052 sb->s_blocksize * 8);
883cb9d1
MS		 1053}
1054
66e1da3f
MS		 1055static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1056{
66e1da3f
MS		 1057 struct udf_bitmap *bitmap;
1058 int nr_groups;
1059 int size;
1060
883cb9d1 1061 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1062 size = sizeof(struct udf_bitmap) +
1063 (sizeof(struct buffer_head *) * nr_groups);
1064
1065 if (size <= PAGE_SIZE)
ed2ae6f6 1066 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 1067 else
ed2ae6f6 1068 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f 1069
75b09e02 1070 if (bitmap == NULL)
66e1da3f 1071 return NULL;
66e1da3f 1072
66e1da3f
MS		 1073 bitmap->s_nr_groups = nr_groups;
1074 return bitmap;
1075}
1076
3fb38dfa
JK		 1077static int udf_fill_partdesc_info(struct super_block *sb,
1078 struct partitionDesc *p, int p_index)
1da177e4 1079{
6c79e987 1080 struct udf_part_map *map;
165923fa 1081 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1082 struct partitionHeaderDesc *phd;
165923fa 1083
3fb38dfa 1084 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1085
1086 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1087 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1088
1089 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1090 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1091 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1092 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1093 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1094 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1095 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1096 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1097
a983f368
JP		 1098 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1099 p_index, map->s_partition_type,
1100 map->s_partition_root, map->s_partition_len);
165923fa
MS		 1101
1102 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1103 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1104 return 0;
165923fa
MS		 1105
1106 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1107 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1108 struct kernel_lb_addr loc = {
165923fa
MS		 1109 .logicalBlockNum = le32_to_cpu(
1110 phd->unallocSpaceTable.extPosition),
3fb38dfa 1111 .partitionReferenceNum = p_index,
165923fa
MS		 1112 };
1113
97e961fd 1114 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1115 if (!map->s_uspace.s_table) {
1116 udf_debug("cannot load unallocSpaceTable (part %d)\n",
a983f368 1117 p_index);
d759bfa4 1118 return -EIO;
165923fa
MS		 1119 }
1120 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1121 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
a983f368 1122 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1123 }
1124
1125 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1126 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1127 if (!bitmap)
d759bfa4 1128 return -ENOMEM;
165923fa 1129 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1130 bitmap->s_extPosition = le32_to_cpu(
165923fa 1131 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1132 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
a983f368
JP		 1133 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1134 p_index, bitmap->s_extPosition);
165923fa
MS		 1135 }
1136
1137 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1138 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1139
1140 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1141 struct kernel_lb_addr loc = {
165923fa
MS		 1142 .logicalBlockNum = le32_to_cpu(
1143 phd->freedSpaceTable.extPosition),
3fb38dfa 1144 .partitionReferenceNum = p_index,
165923fa
MS		 1145 };
1146
97e961fd 1147 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1148 if (!map->s_fspace.s_table) {
3fb38dfa 1149 udf_debug("cannot load freedSpaceTable (part %d)\n",
a983f368 1150 p_index);
d759bfa4 1151 return -EIO;
165923fa
MS		 1152 }
1153
1154 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1155 udf_debug("freedSpaceTable (part %d) @ %ld\n",
a983f368 1156 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1157 }
1158
1159 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1160 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1161 if (!bitmap)
d759bfa4 1162 return -ENOMEM;
165923fa 1163 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1164 bitmap->s_extPosition = le32_to_cpu(
165923fa 1165 phd->freedSpaceBitmap.extPosition);
2e0838fd 1166 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
a983f368
JP		 1167 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1168 p_index, bitmap->s_extPosition);
165923fa 1169 }
3fb38dfa
JK		 1170 return 0;
1171}
1172
e971b0b9
JK		 1173static void udf_find_vat_block(struct super_block *sb, int p_index,
1174 int type1_index, sector_t start_block)
38b74a53
JK		 1175{
1176 struct udf_sb_info *sbi = UDF_SB(sb);
1177 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1178 sector_t vat_block;
5ca4e4be 1179 struct kernel_lb_addr ino;
e971b0b9
JK		 1180
1181 /*
1182 * VAT file entry is in the last recorded block. Some broken disks have
1183 * it a few blocks before so try a bit harder...
1184 */
1185 ino.partitionReferenceNum = type1_index;
1186 for (vat_block = start_block;
1187 vat_block >= map->s_partition_root &&
1188 vat_block >= start_block - 3 &&
1189 !sbi->s_vat_inode; vat_block--) {
1190 ino.logicalBlockNum = vat_block - map->s_partition_root;
1191 sbi->s_vat_inode = udf_iget(sb, &ino);
1192 }
1193}
1194
1195static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1196{
1197 struct udf_sb_info *sbi = UDF_SB(sb);
1198 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1199 struct buffer_head *bh = NULL;
1200 struct udf_inode_info *vati;
1201 uint32_t pos;
1202 struct virtualAllocationTable20 *vat20;
4bf17af0 1203 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1204
e971b0b9 1205 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1206 if (!sbi->s_vat_inode &&
1207 sbi->s_last_block != blocks - 1) {
78ace70c
JP		 1208 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1209 (unsigned long)sbi->s_last_block,
1210 (unsigned long)blocks - 1);
e971b0b9 1211 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1212 }
38b74a53 1213 if (!sbi->s_vat_inode)
d759bfa4 1214 return -EIO;
38b74a53
JK		 1215
1216 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1217 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1218 map->s_type_specific.s_virtual.s_num_entries =
1219 (sbi->s_vat_inode->i_size - 36) >> 2;
1220 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1221 vati = UDF_I(sbi->s_vat_inode);
1222 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1223 pos = udf_block_map(sbi->s_vat_inode, 0);
1224 bh = sb_bread(sb, pos);
1225 if (!bh)
d759bfa4 1226 return -EIO;
fa5e0815
JK		 1227 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1228 } else {
1229 vat20 = (struct virtualAllocationTable20 *)
1230 vati->i_ext.i_data;
1231 }
38b74a53 1232
38b74a53 1233 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1234 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1235 map->s_type_specific.s_virtual.s_num_entries =
1236 (sbi->s_vat_inode->i_size -
1237 map->s_type_specific.s_virtual.
1238 s_start_offset) >> 2;
1239 brelse(bh);
1240 }
1241 return 0;
1242}
1243
d759bfa4
JK		 1244/*
1245 * Load partition descriptor block
1246 *
1247 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1248 * sequence.
1249 */
3fb38dfa
JK		 1250static int udf_load_partdesc(struct super_block *sb, sector_t block)
1251{
1252 struct buffer_head *bh;
1253 struct partitionDesc *p;
1254 struct udf_part_map *map;
1255 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1256 int i, type1_idx;
3fb38dfa
JK		 1257 uint16_t partitionNumber;
1258 uint16_t ident;
d759bfa4 1259 int ret;
3fb38dfa
JK		 1260
1261 bh = udf_read_tagged(sb, block, block, &ident);
1262 if (!bh)
d759bfa4
JK		 1263 return -EAGAIN;
1264 if (ident != TAG_IDENT_PD) {
1265 ret = 0;
3fb38dfa 1266 goto out_bh;
d759bfa4 1267 }
3fb38dfa
JK		 1268
1269 p = (struct partitionDesc *)bh->b_data;
1270 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1271
bfb257a5 1272 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1273 for (i = 0; i < sbi->s_partitions; i++) {
1274 map = &sbi->s_partmaps[i];
1275 udf_debug("Searching map: (%d == %d)\n",
1276 map->s_partition_num, partitionNumber);
38b74a53
JK		 1277 if (map->s_partition_num == partitionNumber &&
1278 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1279 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1280 break;
1281 }
1282
38b74a53 1283 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1284 udf_debug("Partition (%d) not found in partition map\n",
1285 partitionNumber);
d759bfa4 1286 ret = 0;
3fb38dfa
JK		 1287 goto out_bh;
1288 }
165923fa 1289
3fb38dfa 1290 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4
JK		 1291 if (ret < 0)
1292 goto out_bh;
38b74a53
JK		 1293
1294 /*
bfb257a5
JK		 1295 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1296 * PHYSICAL partitions are already set up
38b74a53
JK		 1297 */
1298 type1_idx = i;
44499602
PF		 1299#ifdef UDFFS_DEBUG
1300 map = NULL; /* supress 'maybe used uninitialized' warning */
1301#endif
38b74a53
JK		 1302 for (i = 0; i < sbi->s_partitions; i++) {
1303 map = &sbi->s_partmaps[i];
1304
1305 if (map->s_partition_num == partitionNumber &&
1306 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1307 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1308 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1309 break;
1310 }
1311
d759bfa4
JK		 1312 if (i >= sbi->s_partitions) {
1313 ret = 0;
38b74a53 1314 goto out_bh;
d759bfa4 1315 }
38b74a53
JK		 1316
1317 ret = udf_fill_partdesc_info(sb, p, i);
d759bfa4 1318 if (ret < 0)
38b74a53
JK		 1319 goto out_bh;
1320
bfb257a5
JK		 1321 if (map->s_partition_type == UDF_METADATA_MAP25) {
1322 ret = udf_load_metadata_files(sb, i);
d759bfa4 1323 if (ret < 0) {
78ace70c
JP		 1324 udf_err(sb, "error loading MetaData partition map %d\n",
1325 i);
bfb257a5
JK		 1326 goto out_bh;
1327 }
1328 } else {
e729eac6
JK		 1329 /*
1330 * If we have a partition with virtual map, we don't handle
1331 * writing to it (we overwrite blocks instead of relocating
1332 * them).
1333 */
1334 if (!(sb->s_flags & MS_RDONLY)) {
1335 ret = -EACCES;
1336 goto out_bh;
1337 }
bfb257a5 1338 ret = udf_load_vat(sb, i, type1_idx);
d759bfa4 1339 if (ret < 0)
bfb257a5 1340 goto out_bh;
bfb257a5 1341 }
d759bfa4 1342 ret = 0;
c0eb31ed 1343out_bh:
2e0838fd 1344 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1345 brelse(bh);
1346 return ret;
1da177e4
LT		 1347}
1348
1df2ae31
JK		 1349static int udf_load_sparable_map(struct super_block *sb,
1350 struct udf_part_map *map,
1351 struct sparablePartitionMap *spm)
1352{
1353 uint32_t loc;
1354 uint16_t ident;
1355 struct sparingTable *st;
1356 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1357 int i;
1358 struct buffer_head *bh;
1359
1360 map->s_partition_type = UDF_SPARABLE_MAP15;
1361 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1362 if (!is_power_of_2(sdata->s_packet_len)) {
1363 udf_err(sb, "error loading logical volume descriptor: "
1364 "Invalid packet length %u\n",
1365 (unsigned)sdata->s_packet_len);
1366 return -EIO;
1367 }
1368 if (spm->numSparingTables > 4) {
1369 udf_err(sb, "error loading logical volume descriptor: "
1370 "Too many sparing tables (%d)\n",
1371 (int)spm->numSparingTables);
1372 return -EIO;
1373 }
1374
1375 for (i = 0; i < spm->numSparingTables; i++) {
1376 loc = le32_to_cpu(spm->locSparingTable[i]);
1377 bh = udf_read_tagged(sb, loc, loc, &ident);
1378 if (!bh)
1379 continue;
1380
1381 st = (struct sparingTable *)bh->b_data;
1382 if (ident != 0 ||
1383 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1384 strlen(UDF_ID_SPARING)) ||
1385 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1386 sb->s_blocksize) {
1387 brelse(bh);
1388 continue;
1389 }
1390
1391 sdata->s_spar_map[i] = bh;
1392 }
1393 map->s_partition_func = udf_get_pblock_spar15;
1394 return 0;
1395}
1396
c0eb31ed 1397static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1398 struct kernel_lb_addr *fileset)
1da177e4
LT		 1399{
1400 struct logicalVolDesc *lvd;
1df2ae31 1401 int i, offset;
1da177e4 1402 uint8_t type;
6c79e987 1403 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1404 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1405 uint16_t ident;
1406 struct buffer_head *bh;
adee11b2 1407 unsigned int table_len;
d759bfa4 1408 int ret;
1da177e4 1409
c0eb31ed
JK		 1410 bh = udf_read_tagged(sb, block, block, &ident);
1411 if (!bh)
d759bfa4 1412 return -EAGAIN;
c0eb31ed 1413 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4 1414 lvd = (struct logicalVolDesc *)bh->b_data;
adee11b2 1415 table_len = le32_to_cpu(lvd->mapTableLength);
57b9655d 1416 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
adee11b2
JK		 1417 udf_err(sb, "error loading logical volume descriptor: "
1418 "Partition table too long (%u > %lu)\n", table_len,
1419 sb->s_blocksize - sizeof(*lvd));
d759bfa4 1420 ret = -EIO;
adee11b2
JK		 1421 goto out_bh;
1422 }
1da177e4 1423
cb14d340
JK		 1424 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1425 if (ret)
c0eb31ed 1426 goto out_bh;
1da177e4 1427
cb00ea35 1428 for (i = 0, offset = 0;
adee11b2 1429 i < sbi->s_partitions && offset < table_len;
4b11111a
MS		 1430 i++, offset += gpm->partitionMapLength) {
1431 struct udf_part_map *map = &sbi->s_partmaps[i];
1432 gpm = (struct genericPartitionMap *)
1433 &(lvd->partitionMaps[offset]);
1434 type = gpm->partitionMapType;
cb00ea35 1435 if (type == 1) {
4b11111a
MS		 1436 struct genericPartitionMap1 *gpm1 =
1437 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1438 map->s_partition_type = UDF_TYPE1_MAP15;
1439 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1440 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1441 map->s_partition_func = NULL;
cb00ea35 1442 } else if (type == 2) {
4b11111a
MS		 1443 struct udfPartitionMap2 *upm2 =
1444 (struct udfPartitionMap2 *)gpm;
1445 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1446 strlen(UDF_ID_VIRTUAL))) {
1447 u16 suf =
1448 le16_to_cpu(((__le16 *)upm2->partIdent.
1449 identSuffix)[0]);
c82a1275 1450 if (suf < 0x0200) {
4b11111a
MS		 1451 map->s_partition_type =
1452 UDF_VIRTUAL_MAP15;
1453 map->s_partition_func =
1454 udf_get_pblock_virt15;
c82a1275 1455 } else {
4b11111a
MS		 1456 map->s_partition_type =
1457 UDF_VIRTUAL_MAP20;
1458 map->s_partition_func =
1459 udf_get_pblock_virt20;
1da177e4 1460 }
4b11111a
MS		 1461 } else if (!strncmp(upm2->partIdent.ident,
1462 UDF_ID_SPARABLE,
1463 strlen(UDF_ID_SPARABLE))) {
d759bfa4
JK		 1464 ret = udf_load_sparable_map(sb, map,
1465 (struct sparablePartitionMap *)gpm);
1466 if (ret < 0)
1df2ae31 1467 goto out_bh;
bfb257a5
JK		 1468 } else if (!strncmp(upm2->partIdent.ident,
1469 UDF_ID_METADATA,
1470 strlen(UDF_ID_METADATA))) {
1471 struct udf_meta_data *mdata =
1472 &map->s_type_specific.s_metadata;
1473 struct metadataPartitionMap *mdm =
1474 (struct metadataPartitionMap *)
1475 &(lvd->partitionMaps[offset]);
a983f368
JP		 1476 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1477 i, type, UDF_ID_METADATA);
bfb257a5
JK		 1478
1479 map->s_partition_type = UDF_METADATA_MAP25;
1480 map->s_partition_func = udf_get_pblock_meta25;
1481
1482 mdata->s_meta_file_loc =
1483 le32_to_cpu(mdm->metadataFileLoc);
1484 mdata->s_mirror_file_loc =
1485 le32_to_cpu(mdm->metadataMirrorFileLoc);
1486 mdata->s_bitmap_file_loc =
1487 le32_to_cpu(mdm->metadataBitmapFileLoc);
1488 mdata->s_alloc_unit_size =
1489 le32_to_cpu(mdm->allocUnitSize);
1490 mdata->s_align_unit_size =
1491 le16_to_cpu(mdm->alignUnitSize);
ed47a7d0
JK		 1492 if (mdm->flags & 0x01)
1493 mdata->s_flags |= MF_DUPLICATE_MD;
bfb257a5
JK		 1494
1495 udf_debug("Metadata Ident suffix=0x%x\n",
a983f368
JP		 1496 le16_to_cpu(*(__le16 *)
1497 mdm->partIdent.identSuffix));
bfb257a5 1498 udf_debug("Metadata part num=%d\n",
a983f368 1499 le16_to_cpu(mdm->partitionNum));
bfb257a5 1500 udf_debug("Metadata part alloc unit size=%d\n",
a983f368 1501 le32_to_cpu(mdm->allocUnitSize));
bfb257a5 1502 udf_debug("Metadata file loc=%d\n",
a983f368 1503 le32_to_cpu(mdm->metadataFileLoc));
bfb257a5 1504 udf_debug("Mirror file loc=%d\n",
a983f368 1505 le32_to_cpu(mdm->metadataMirrorFileLoc));
bfb257a5 1506 udf_debug("Bitmap file loc=%d\n",
a983f368 1507 le32_to_cpu(mdm->metadataBitmapFileLoc));
ed47a7d0
JK		 1508 udf_debug("Flags: %d %d\n",
1509 mdata->s_flags, mdm->flags);
cb00ea35 1510 } else {
3a71fc5d
MS		 1511 udf_debug("Unknown ident: %s\n",
1512 upm2->partIdent.ident);
1da177e4
LT		 1513 continue;
1514 }
6c79e987
MS		 1515 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1516 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1517 }
1518 udf_debug("Partition (%d:%d) type %d on volume %d\n",
a983f368 1519 i, map->s_partition_num, type, map->s_volumeseqnum);
1da177e4
LT		 1520 }
1521
cb00ea35 1522 if (fileset) {
5ca4e4be 1523 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1524
1525 *fileset = lelb_to_cpu(la->extLocation);
a983f368
JP		 1526 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1527 fileset->logicalBlockNum,
28de7948 1528 fileset->partitionReferenceNum);
1da177e4
LT		 1529 }
1530 if (lvd->integritySeqExt.extLength)
1531 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
d759bfa4 1532 ret = 0;
c0eb31ed
JK		 1533out_bh:
1534 brelse(bh);
1535 return ret;
1da177e4
LT		 1536}
1537
1538/*
1539 * udf_load_logicalvolint
1540 *
1541 */
5ca4e4be 1542static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1543{
1544 struct buffer_head *bh = NULL;
1545 uint16_t ident;
6c79e987
MS		 1546 struct udf_sb_info *sbi = UDF_SB(sb);
1547 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1548
1549 while (loc.extLength > 0 &&
cb00ea35
CG		 1550 (bh = udf_read_tagged(sb, loc.extLocation,
1551 loc.extLocation, &ident)) &&
1552 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1553 sbi->s_lvid_bh = bh;
1554 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1555
6c79e987 1556 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1557 udf_load_logicalvolint(sb,
6c79e987 1558 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1559
6c79e987 1560 if (sbi->s_lvid_bh != bh)
3bf25cb4 1561 brelse(bh);
1da177e4 1562 loc.extLength -= sb->s_blocksize;
cb00ea35 1563 loc.extLocation++;
1da177e4 1564 }
6c79e987 1565 if (sbi->s_lvid_bh != bh)
3bf25cb4 1566 brelse(bh);
1da177e4
LT		 1567}
1568
1569/*
d759bfa4
JK		 1570 * Process a main/reserve volume descriptor sequence.
1571 * @block First block of first extent of the sequence.
1572 * @lastblock Lastblock of first extent of the sequence.
1573 * @fileset There we store extent containing root fileset
1da177e4 1574 *
d759bfa4
JK		 1575 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1576 * sequence
1da177e4 1577 */
d759bfa4
JK		 1578static noinline int udf_process_sequence(
1579 struct super_block *sb,
1580 sector_t block, sector_t lastblock,
1581 struct kernel_lb_addr *fileset)
1da177e4
LT		 1582{
1583 struct buffer_head *bh = NULL;
1584 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1585 struct udf_vds_record *curr;
1da177e4
LT		 1586 struct generic_desc *gd;
1587 struct volDescPtr *vdp;
cb00ea35 1588 int done = 0;
1da177e4
LT		 1589 uint32_t vdsn;
1590 uint16_t ident;
1591 long next_s = 0, next_e = 0;
d759bfa4 1592 int ret;
1da177e4
LT		 1593
1594 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1595
c0eb31ed
JK		 1596 /*
1597 * Read the main descriptor sequence and find which descriptors
1598 * are in it.
1599 */
cb00ea35 1600 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1601
1602 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed 1603 if (!bh) {
78ace70c
JP		 1604 udf_err(sb,
1605 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1606 (unsigned long long)block);
d759bfa4 1607 return -EAGAIN;
c0eb31ed 1608 }
1da177e4
LT		 1609
1610 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1611 gd = (struct generic_desc *)bh->b_data;
1612 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1613 switch (ident) {
28de7948 1614 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1615 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1616 if (vdsn >= curr->volDescSeqNum) {
1617 curr->volDescSeqNum = vdsn;
1618 curr->block = block;
cb00ea35
CG		 1619 }
1620 break;
28de7948 1621 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1622 curr = &vds[VDS_POS_VOL_DESC_PTR];
1623 if (vdsn >= curr->volDescSeqNum) {
1624 curr->volDescSeqNum = vdsn;
1625 curr->block = block;
cb00ea35
CG		 1626
1627 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1628 next_s = le32_to_cpu(
1629 vdp->nextVolDescSeqExt.extLocation);
1630 next_e = le32_to_cpu(
1631 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1632 next_e = next_e >> sb->s_blocksize_bits;
1633 next_e += next_s;
1634 }
1635 break;
28de7948 1636 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1637 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1638 if (vdsn >= curr->volDescSeqNum) {
1639 curr->volDescSeqNum = vdsn;
1640 curr->block = block;
cb00ea35
CG		 1641 }
1642 break;
28de7948 1643 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1644 curr = &vds[VDS_POS_PARTITION_DESC];
1645 if (!curr->block)
1646 curr->block = block;
cb00ea35 1647 break;
28de7948 1648 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1649 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1650 if (vdsn >= curr->volDescSeqNum) {
1651 curr->volDescSeqNum = vdsn;
1652 curr->block = block;
cb00ea35
CG		 1653 }
1654 break;
28de7948 1655 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1656 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1657 if (vdsn >= curr->volDescSeqNum) {
1658 curr->volDescSeqNum = vdsn;
1659 curr->block = block;
cb00ea35
CG		 1660 }
1661 break;
28de7948 1662 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1663 vds[VDS_POS_TERMINATING_DESC].block = block;
1664 if (next_e) {
1665 block = next_s;
1666 lastblock = next_e;
1667 next_s = next_e = 0;
4b11111a 1668 } else
cb00ea35
CG		 1669 done = 1;
1670 break;
1da177e4 1671 }
3bf25cb4 1672 brelse(bh);
1da177e4 1673 }
c0eb31ed
JK		 1674 /*
1675 * Now read interesting descriptors again and process them
1676 * in a suitable order
1677 */
1678 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
78ace70c 1679 udf_err(sb, "Primary Volume Descriptor not found!\n");
d759bfa4
JK		 1680 return -EAGAIN;
1681 }
1682 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1683 if (ret < 0)
1684 return ret;
1685
1686 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1687 ret = udf_load_logicalvol(sb,
1688 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1689 fileset);
1690 if (ret < 0)
1691 return ret;
c0eb31ed 1692 }
165923fa 1693
c0eb31ed
JK		 1694 if (vds[VDS_POS_PARTITION_DESC].block) {
1695 /*
1696 * We rescan the whole descriptor sequence to find
1697 * partition descriptor blocks and process them.
1698 */
1699 for (block = vds[VDS_POS_PARTITION_DESC].block;
1700 block < vds[VDS_POS_TERMINATING_DESC].block;
d759bfa4
JK		 1701 block++) {
1702 ret = udf_load_partdesc(sb, block);
1703 if (ret < 0)
1704 return ret;
1705 }
1da177e4
LT		 1706 }
1707
1708 return 0;
1709}
1710
d759bfa4
JK		 1711/*
1712 * Load Volume Descriptor Sequence described by anchor in bh
1713 *
1714 * Returns <0 on error, 0 on success
1715 */
40346005
JK		 1716static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1717 struct kernel_lb_addr *fileset)
1da177e4 1718{
40346005 1719 struct anchorVolDescPtr *anchor;
d759bfa4
JK		 1720 sector_t main_s, main_e, reserve_s, reserve_e;
1721 int ret;
1da177e4 1722
40346005
JK		 1723 anchor = (struct anchorVolDescPtr *)bh->b_data;
1724
1725 /* Locate the main sequence */
1726 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1727 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1728 main_e = main_e >> sb->s_blocksize_bits;
1729 main_e += main_s;
1730
1731 /* Locate the reserve sequence */
1732 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1733 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1734 reserve_e = reserve_e >> sb->s_blocksize_bits;
1735 reserve_e += reserve_s;
1736
1737 /* Process the main & reserve sequences */
1738 /* responsible for finding the PartitionDesc(s) */
d759bfa4
JK		 1739 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1740 if (ret != -EAGAIN)
1741 return ret;
bff943af 1742 udf_sb_free_partitions(sb);
d759bfa4
JK		 1743 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1744 if (ret < 0) {
1745 udf_sb_free_partitions(sb);
1746 /* No sequence was OK, return -EIO */
1747 if (ret == -EAGAIN)
1748 ret = -EIO;
1749 }
1750 return ret;
1da177e4
LT		 1751}
1752
40346005
JK		 1753/*
1754 * Check whether there is an anchor block in the given block and
1755 * load Volume Descriptor Sequence if so.
d759bfa4
JK		 1756 *
1757 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1758 * block
40346005
JK		 1759 */
1760static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1761 struct kernel_lb_addr *fileset)
1197e4df 1762{
40346005
JK		 1763 struct buffer_head *bh;
1764 uint16_t ident;
1765 int ret;
1197e4df 1766
40346005
JK		 1767 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1768 udf_fixed_to_variable(block) >=
1769 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
d759bfa4 1770 return -EAGAIN;
40346005
JK		 1771
1772 bh = udf_read_tagged(sb, block, block, &ident);
1773 if (!bh)
d759bfa4 1774 return -EAGAIN;
40346005
JK		 1775 if (ident != TAG_IDENT_AVDP) {
1776 brelse(bh);
d759bfa4 1777 return -EAGAIN;
1197e4df 1778 }
40346005
JK		 1779 ret = udf_load_sequence(sb, bh, fileset);
1780 brelse(bh);
1781 return ret;
1197e4df
CL		 1782}
1783
d759bfa4
JK		 1784/*
1785 * Search for an anchor volume descriptor pointer.
1786 *
1787 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1788 * of anchors.
1789 */
1790static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1791 struct kernel_lb_addr *fileset)
1da177e4 1792{
40346005 1793 sector_t last[6];
38b74a53 1794 int i;
40346005
JK		 1795 struct udf_sb_info *sbi = UDF_SB(sb);
1796 int last_count = 0;
d759bfa4 1797 int ret;
1da177e4 1798
40346005
JK		 1799 /* First try user provided anchor */
1800 if (sbi->s_anchor) {
d759bfa4
JK		 1801 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1802 if (ret != -EAGAIN)
1803 return ret;
40346005
JK		 1804 }
1805 /*
1806 * according to spec, anchor is in either:
1807 * block 256
1808 * lastblock-256
1809 * lastblock
1810 * however, if the disc isn't closed, it could be 512.
1811 */
d759bfa4
JK		 1812 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1813 if (ret != -EAGAIN)
1814 return ret;
40346005
JK		 1815 /*
1816 * The trouble is which block is the last one. Drives often misreport
1817 * this so we try various possibilities.
1818 */
d759bfa4
JK		 1819 last[last_count++] = *lastblock;
1820 if (*lastblock >= 1)
1821 last[last_count++] = *lastblock - 1;
1822 last[last_count++] = *lastblock + 1;
1823 if (*lastblock >= 2)
1824 last[last_count++] = *lastblock - 2;
1825 if (*lastblock >= 150)
1826 last[last_count++] = *lastblock - 150;
1827 if (*lastblock >= 152)
1828 last[last_count++] = *lastblock - 152;
1da177e4 1829
40346005
JK		 1830 for (i = 0; i < last_count; i++) {
1831 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1832 sb->s_blocksize_bits)
28f7c4d4 1833 continue;
d759bfa4
JK		 1834 ret = udf_check_anchor_block(sb, last[i], fileset);
1835 if (ret != -EAGAIN) {
1836 if (!ret)
1837 *lastblock = last[i];
1838 return ret;
1839 }
40346005 1840 if (last[i] < 256)
28f7c4d4 1841 continue;
d759bfa4
JK		 1842 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1843 if (ret != -EAGAIN) {
1844 if (!ret)
1845 *lastblock = last[i];
1846 return ret;
1847 }
40346005 1848 }
28f7c4d4 1849
40346005 1850 /* Finally try block 512 in case media is open */
d759bfa4 1851 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
40346005 1852}
28f7c4d4 1853
40346005
JK		 1854/*
1855 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1856 * area specified by it. The function expects sbi->s_lastblock to be the last
1857 * block on the media.
1858 *
d759bfa4
JK		 1859 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1860 * was not found.
40346005
JK		 1861 */
1862static int udf_find_anchor(struct super_block *sb,
1863 struct kernel_lb_addr *fileset)
1864{
40346005 1865 struct udf_sb_info *sbi = UDF_SB(sb);
d759bfa4
JK		 1866 sector_t lastblock = sbi->s_last_block;
1867 int ret;
28f7c4d4 1868
d759bfa4
JK		 1869 ret = udf_scan_anchors(sb, &lastblock, fileset);
1870 if (ret != -EAGAIN)
40346005 1871 goto out;
1da177e4 1872
40346005
JK		 1873 /* No anchor found? Try VARCONV conversion of block numbers */
1874 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
d759bfa4 1875 lastblock = udf_variable_to_fixed(sbi->s_last_block);
40346005 1876 /* Firstly, we try to not convert number of the last block */
d759bfa4
JK		 1877 ret = udf_scan_anchors(sb, &lastblock, fileset);
1878 if (ret != -EAGAIN)
40346005 1879 goto out;
1da177e4 1880
d759bfa4 1881 lastblock = sbi->s_last_block;
40346005 1882 /* Secondly, we try with converted number of the last block */
d759bfa4
JK		 1883 ret = udf_scan_anchors(sb, &lastblock, fileset);
1884 if (ret < 0) {
40346005
JK		 1885 /* VARCONV didn't help. Clear it. */
1886 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1da177e4 1887 }
40346005 1888out:
d759bfa4
JK		 1889 if (ret == 0)
1890 sbi->s_last_block = lastblock;
1891 return ret;
40346005 1892}
1da177e4 1893
40346005
JK		 1894/*
1895 * Check Volume Structure Descriptor, find Anchor block and load Volume
d759bfa4
JK		 1896 * Descriptor Sequence.
1897 *
1898 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1899 * block was not found.
40346005
JK		 1900 */
1901static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1902 int silent, struct kernel_lb_addr *fileset)
1903{
1904 struct udf_sb_info *sbi = UDF_SB(sb);
1905 loff_t nsr_off;
d759bfa4 1906 int ret;
40346005
JK		 1907
1908 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1909 if (!silent)
78ace70c 1910 udf_warn(sb, "Bad block size\n");
d759bfa4 1911 return -EINVAL;
40346005
JK		 1912 }
1913 sbi->s_last_block = uopt->lastblock;
1914 if (!uopt->novrs) {
1915 /* Check that it is NSR02 compliant */
1916 nsr_off = udf_check_vsd(sb);
1917 if (!nsr_off) {
1918 if (!silent)
78ace70c 1919 udf_warn(sb, "No VRS found\n");
40346005
JK		 1920 return 0;
1921 }
1922 if (nsr_off == -1)
44499602
PF		 1923 udf_debug("Failed to read sector at offset %d. "
1924 "Assuming open disc. Skipping validity "
1925 "check\n", VSD_FIRST_SECTOR_OFFSET);
40346005
JK		 1926 if (!sbi->s_last_block)
1927 sbi->s_last_block = udf_get_last_block(sb);
1928 } else {
1929 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1930 }
1da177e4 1931
40346005
JK		 1932 /* Look for anchor block and load Volume Descriptor Sequence */
1933 sbi->s_anchor = uopt->anchor;
d759bfa4
JK		 1934 ret = udf_find_anchor(sb, fileset);
1935 if (ret < 0) {
1936 if (!silent && ret == -EAGAIN)
78ace70c 1937 udf_warn(sb, "No anchor found\n");
d759bfa4 1938 return ret;
40346005 1939 }
d759bfa4 1940 return 0;
1da177e4
LT		 1941}
1942
1943static void udf_open_lvid(struct super_block *sb)
1944{
6c79e987
MS		 1945 struct udf_sb_info *sbi = UDF_SB(sb);
1946 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1947 struct logicalVolIntegrityDesc *lvid;
1948 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1949
165923fa
MS		 1950 if (!bh)
1951 return;
165923fa 1952 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
69d75671
JK		 1953 lvidiu = udf_sb_lvidiu(sb);
1954 if (!lvidiu)
1955 return;
165923fa 1956
69d75671 1957 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1958 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1959 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1960 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1961 CURRENT_TIME);
146bca72 1962 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1963
1964 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1965 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1966 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1967
1968 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1969 mark_buffer_dirty(bh);
146bca72 1970 sbi->s_lvid_dirty = 0;
949f4a7c 1971 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 1972 /* Make opening of filesystem visible on the media immediately */
1973 sync_dirty_buffer(bh);
1da177e4
LT		 1974}
1975
1976static void udf_close_lvid(struct super_block *sb)
1977{
6c79e987
MS		 1978 struct udf_sb_info *sbi = UDF_SB(sb);
1979 struct buffer_head *bh = sbi->s_lvid_bh;
1980 struct logicalVolIntegrityDesc *lvid;
165923fa 1981 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1982
6c79e987
MS		 1983 if (!bh)
1984 return;
69d75671
JK		 1985 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1986 lvidiu = udf_sb_lvidiu(sb);
1987 if (!lvidiu)
1988 return;
6c79e987 1989
949f4a7c 1990 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1991 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1992 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1993 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1994 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1995 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1996 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1997 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1998 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1999 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2000 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2001
2002 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 2003 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 2004 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 2005
2006 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
853a0c25
JK		 2007 /*
2008 * We set buffer uptodate unconditionally here to avoid spurious
2009 * warnings from mark_buffer_dirty() when previous EIO has marked
2010 * the buffer as !uptodate
2011 */
2012 set_buffer_uptodate(bh);
165923fa 2013 mark_buffer_dirty(bh);
146bca72 2014 sbi->s_lvid_dirty = 0;
949f4a7c 2015 mutex_unlock(&sbi->s_alloc_mutex);
9734c971
JK		 2016 /* Make closing of filesystem visible on the media immediately */
2017 sync_dirty_buffer(bh);
1da177e4
LT		 2018}
2019
d664b6af
JK		 2020u64 lvid_get_unique_id(struct super_block *sb)
2021{
2022 struct buffer_head *bh;
2023 struct udf_sb_info *sbi = UDF_SB(sb);
2024 struct logicalVolIntegrityDesc *lvid;
2025 struct logicalVolHeaderDesc *lvhd;
2026 u64 uniqueID;
2027 u64 ret;
2028
2029 bh = sbi->s_lvid_bh;
2030 if (!bh)
2031 return 0;
2032
2033 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2034 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2035
2036 mutex_lock(&sbi->s_alloc_mutex);
2037 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2038 if (!(++uniqueID & 0xFFFFFFFF))
2039 uniqueID += 16;
2040 lvhd->uniqueID = cpu_to_le64(uniqueID);
2041 mutex_unlock(&sbi->s_alloc_mutex);
2042 mark_buffer_dirty(bh);
2043
2044 return ret;
1da177e4
LT		 2045}
2046
1da177e4
LT		 2047static int udf_fill_super(struct super_block *sb, void *options, int silent)
2048{
d759bfa4 2049 int ret = -EINVAL;
cb00ea35 2050 struct inode *inode = NULL;
1da177e4 2051 struct udf_options uopt;
5ca4e4be 2052 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 2053 struct udf_sb_info *sbi;
2054
2055 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
c2ba138a
EB		 2056 uopt.uid = INVALID_UID;
2057 uopt.gid = INVALID_GID;
1da177e4 2058 uopt.umask = 0;
87bc730c
MS		 2059 uopt.fmode = UDF_INVALID_MODE;
2060 uopt.dmode = UDF_INVALID_MODE;
1da177e4 2061
6c79e987 2062 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 2063 if (!sbi)
1da177e4 2064 return -ENOMEM;
28de7948 2065
1da177e4 2066 sb->s_fs_info = sbi;
1da177e4 2067
1e7933de 2068 mutex_init(&sbi->s_alloc_mutex);
1da177e4 2069
6da80894 2070 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 2071 goto error_out;
2072
2073 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 2074 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 2075 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 2076 goto error_out;
2077 }
2078#ifdef CONFIG_UDF_NLS
cb00ea35 2079 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 2080 uopt.nls_map = load_nls_default();
2081 if (!uopt.nls_map)
2082 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2083 else
2084 udf_debug("Using default NLS map\n");
2085 }
2086#endif
2087 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2088 uopt.flags |= (1 << UDF_FLAG_UTF8);
2089
2090 fileset.logicalBlockNum = 0xFFFFFFFF;
2091 fileset.partitionReferenceNum = 0xFFFF;
2092
6c79e987
MS		 2093 sbi->s_flags = uopt.flags;
2094 sbi->s_uid = uopt.uid;
2095 sbi->s_gid = uopt.gid;
2096 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 2097 sbi->s_fmode = uopt.fmode;
2098 sbi->s_dmode = uopt.dmode;
6c79e987 2099 sbi->s_nls_map = uopt.nls_map;
c03cad24 2100 rwlock_init(&sbi->s_cred_lock);
1da177e4 2101
cb00ea35 2102 if (uopt.session == 0xFFFFFFFF)
6c79e987 2103 sbi->s_session = udf_get_last_session(sb);
1da177e4 2104 else
6c79e987 2105 sbi->s_session = uopt.session;
1da177e4 2106
6c79e987 2107 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 2108
40346005
JK		 2109 /* Fill in the rest of the superblock */
2110 sb->s_op = &udf_sb_ops;
2111 sb->s_export_op = &udf_export_ops;
123e9caf 2112
40346005
JK		 2113 sb->s_magic = UDF_SUPER_MAGIC;
2114 sb->s_time_gran = 1000;
2115
1197e4df 2116 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 2117 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2118 } else {
e1defc4f 2119 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005 2120 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
d759bfa4 2121 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df 2122 if (!silent)
78ace70c
JP		 2123 pr_notice("Rescanning with blocksize %d\n",
2124 UDF_DEFAULT_BLOCKSIZE);
dc141a40
AS		 2125 brelse(sbi->s_lvid_bh);
2126 sbi->s_lvid_bh = NULL;
1197e4df 2127 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 2128 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 2129 }
1da177e4 2130 }
d759bfa4
JK		 2131 if (ret < 0) {
2132 if (ret == -EAGAIN) {
2133 udf_warn(sb, "No partition found (1)\n");
2134 ret = -EINVAL;
2135 }
1da177e4
LT		 2136 goto error_out;
2137 }
2138
6c79e987 2139 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2140
6c79e987 2141 if (sbi->s_lvid_bh) {
4b11111a 2142 struct logicalVolIntegrityDescImpUse *lvidiu =
69d75671
JK		 2143 udf_sb_lvidiu(sb);
2144 uint16_t minUDFReadRev;
2145 uint16_t minUDFWriteRev;
1da177e4 2146
69d75671
JK		 2147 if (!lvidiu) {
2148 ret = -EINVAL;
2149 goto error_out;
2150 }
2151 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2152 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
cb00ea35 2153 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
78ace70c 2154 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
69d75671 2155 minUDFReadRev,
78ace70c 2156 UDF_MAX_READ_VERSION);
d759bfa4 2157 ret = -EINVAL;
1da177e4 2158 goto error_out;
e729eac6
JK		 2159 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2160 !(sb->s_flags & MS_RDONLY)) {
2161 ret = -EACCES;
2162 goto error_out;
2163 }
1da177e4 2164
6c79e987 2165 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2166
2167 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2168 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2169 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2170 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2171 }
2172
6c79e987 2173 if (!sbi->s_partitions) {
78ace70c 2174 udf_warn(sb, "No partition found (2)\n");
d759bfa4 2175 ret = -EINVAL;
1da177e4
LT		 2176 goto error_out;
2177 }
2178
4b11111a 2179 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
e729eac6
JK		 2180 UDF_PART_FLAG_READ_ONLY &&
2181 !(sb->s_flags & MS_RDONLY)) {
2182 ret = -EACCES;
2183 goto error_out;
c1a26e7d 2184 }
39b3f6d6 2185
cb00ea35 2186 if (udf_find_fileset(sb, &fileset, &rootdir)) {
78ace70c 2187 udf_warn(sb, "No fileset found\n");
d759bfa4 2188 ret = -EINVAL;
1da177e4
LT		 2189 goto error_out;
2190 }
2191
cb00ea35 2192 if (!silent) {
5ca4e4be 2193 struct timestamp ts;
56774805 2194 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
78ace70c
JP		 2195 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2196 sbi->s_volume_ident,
2197 le16_to_cpu(ts.year), ts.month, ts.day,
56774805 2198 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2199 }
2200 if (!(sb->s_flags & MS_RDONLY))
2201 udf_open_lvid(sb);
2202
2203 /* Assign the root inode */
2204 /* assign inodes by physical block number */
2205 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2206 inode = udf_iget(sb, &rootdir);
cb00ea35 2207 if (!inode) {
78ace70c 2208 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
cb00ea35 2209 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
d759bfa4 2210 ret = -EIO;
1da177e4
LT		 2211 goto error_out;
2212 }
2213
2214 /* Allocate a dentry for the root inode */
48fde701 2215 sb->s_root = d_make_root(inode);
cb00ea35 2216 if (!sb->s_root) {
78ace70c 2217 udf_err(sb, "Couldn't allocate root dentry\n");
d759bfa4 2218 ret = -ENOMEM;
1da177e4
LT		 2219 goto error_out;
2220 }
31170b6a 2221 sb->s_maxbytes = MAX_LFS_FILESIZE;
8de52778 2222 sb->s_max_links = UDF_MAX_LINKS;
1da177e4
LT		 2223 return 0;
2224
28de7948 2225error_out:
6c79e987
MS		 2226 if (sbi->s_vat_inode)
2227 iput(sbi->s_vat_inode);
1da177e4
LT		 2228#ifdef CONFIG_UDF_NLS
2229 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2230 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2231#endif
2232 if (!(sb->s_flags & MS_RDONLY))
2233 udf_close_lvid(sb);
6c79e987 2234 brelse(sbi->s_lvid_bh);
bff943af 2235 udf_sb_free_partitions(sb);
1da177e4
LT		 2236 kfree(sbi);
2237 sb->s_fs_info = NULL;
28de7948 2238
d759bfa4 2239 return ret;
1da177e4
LT		 2240}
2241
8076c363
JP		 2242void _udf_err(struct super_block *sb, const char *function,
2243 const char *fmt, ...)
1da177e4 2244{
c2bff36c 2245 struct va_format vaf;
1da177e4
LT		 2246 va_list args;
2247
1da177e4 2248 va_start(args, fmt);
c2bff36c
JP		 2249
2250 vaf.fmt = fmt;
2251 vaf.va = &args;
2252
2253 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2254
1da177e4 2255 va_end(args);
1da177e4
LT		 2256}
2257
a40ecd7b
JP		 2258void _udf_warn(struct super_block *sb, const char *function,
2259 const char *fmt, ...)
1da177e4 2260{
c2bff36c 2261 struct va_format vaf;
1da177e4
LT		 2262 va_list args;
2263
cb00ea35 2264 va_start(args, fmt);
c2bff36c
JP		 2265
2266 vaf.fmt = fmt;
2267 vaf.va = &args;
2268
2269 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2270
1da177e4 2271 va_end(args);
1da177e4
LT		 2272}
2273
cb00ea35 2274static void udf_put_super(struct super_block *sb)
1da177e4 2275{
6c79e987 2276 struct udf_sb_info *sbi;
1da177e4 2277
6c79e987 2278 sbi = UDF_SB(sb);
6cfd0148 2279
6c79e987
MS		 2280 if (sbi->s_vat_inode)
2281 iput(sbi->s_vat_inode);
1da177e4
LT		 2282#ifdef CONFIG_UDF_NLS
2283 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2284 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2285#endif
2286 if (!(sb->s_flags & MS_RDONLY))
2287 udf_close_lvid(sb);
6c79e987 2288 brelse(sbi->s_lvid_bh);
bff943af 2289 udf_sb_free_partitions(sb);
1da177e4
LT		 2290 kfree(sb->s_fs_info);
2291 sb->s_fs_info = NULL;
2292}
2293
146bca72
JK		 2294static int udf_sync_fs(struct super_block *sb, int wait)
2295{
2296 struct udf_sb_info *sbi = UDF_SB(sb);
2297
2298 mutex_lock(&sbi->s_alloc_mutex);
2299 if (sbi->s_lvid_dirty) {
2300 /*
2301 * Blockdevice will be synced later so we don't have to submit
2302 * the buffer for IO
2303 */
2304 mark_buffer_dirty(sbi->s_lvid_bh);
146bca72
JK		 2305 sbi->s_lvid_dirty = 0;
2306 }
2307 mutex_unlock(&sbi->s_alloc_mutex);
2308
2309 return 0;
2310}
2311
cb00ea35 2312static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2313{
726c3342 2314 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2315 struct udf_sb_info *sbi = UDF_SB(sb);
2316 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2317 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987 2318
69d75671 2319 lvidiu = udf_sb_lvidiu(sb);
1da177e4
LT		 2320 buf->f_type = UDF_SUPER_MAGIC;
2321 buf->f_bsize = sb->s_blocksize;
6c79e987 2322 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2323 buf->f_bfree = udf_count_free(sb);
2324 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2325 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2326 le32_to_cpu(lvidiu->numDirs)) : 0)
2327 + buf->f_bfree;
1da177e4 2328 buf->f_ffree = buf->f_bfree;
cb00ea35 2329 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2330 buf->f_fsid.val[0] = (u32)id;
2331 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2332
2333 return 0;
2334}
2335
4b11111a
MS		 2336static unsigned int udf_count_free_bitmap(struct super_block *sb,
2337 struct udf_bitmap *bitmap)
1da177e4
LT		 2338{
2339 struct buffer_head *bh = NULL;
2340 unsigned int accum = 0;
2341 int index;
2342 int block = 0, newblock;
5ca4e4be 2343 struct kernel_lb_addr loc;
1da177e4 2344 uint32_t bytes;
1da177e4
LT		 2345 uint8_t *ptr;
2346 uint16_t ident;
2347 struct spaceBitmapDesc *bm;
2348
1da177e4 2349 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2350 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2351 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2352
cb00ea35 2353 if (!bh) {
78ace70c 2354 udf_err(sb, "udf_count_free failed\n");
1da177e4 2355 goto out;
cb00ea35 2356 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2357 brelse(bh);
78ace70c 2358 udf_err(sb, "udf_count_free failed\n");
1da177e4
LT		 2359 goto out;
2360 }
2361
2362 bm = (struct spaceBitmapDesc *)bh->b_data;
2363 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2364 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2365 ptr = (uint8_t *)bh->b_data;
1da177e4 2366
cb00ea35 2367 while (bytes > 0) {
01b954a3
MS		 2368 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2369 accum += bitmap_weight((const unsigned long *)(ptr + index),
2370 cur_bytes * 8);
2371 bytes -= cur_bytes;
cb00ea35 2372 if (bytes) {
3bf25cb4 2373 brelse(bh);
97e961fd 2374 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2375 bh = udf_tread(sb, newblock);
cb00ea35 2376 if (!bh) {
1da177e4
LT		 2377 udf_debug("read failed\n");
2378 goto out;
2379 }
2380 index = 0;
28de7948 2381 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2382 }
2383 }
3bf25cb4 2384 brelse(bh);
28de7948 2385out:
1da177e4
LT		 2386 return accum;
2387}
2388
4b11111a
MS		 2389static unsigned int udf_count_free_table(struct super_block *sb,
2390 struct inode *table)
1da177e4
LT		 2391{
2392 unsigned int accum = 0;
ff116fc8 2393 uint32_t elen;
5ca4e4be 2394 struct kernel_lb_addr eloc;
1da177e4 2395 int8_t etype;
ff116fc8 2396 struct extent_position epos;
1da177e4 2397
d1668fe3 2398 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2399 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2400 epos.offset = sizeof(struct unallocSpaceEntry);
2401 epos.bh = NULL;
1da177e4 2402
3a71fc5d 2403 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2404 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2405
3bf25cb4 2406 brelse(epos.bh);
d1668fe3 2407 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2408
2409 return accum;
2410}
cb00ea35
CG		 2411
2412static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2413{
2414 unsigned int accum = 0;
6c79e987
MS		 2415 struct udf_sb_info *sbi;
2416 struct udf_part_map *map;
1da177e4 2417
6c79e987
MS		 2418 sbi = UDF_SB(sb);
2419 if (sbi->s_lvid_bh) {
4b11111a
MS		 2420 struct logicalVolIntegrityDesc *lvid =
2421 (struct logicalVolIntegrityDesc *)
2422 sbi->s_lvid_bh->b_data;
6c79e987 2423 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2424 accum = le32_to_cpu(
2425 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2426 if (accum == 0xFFFFFFFF)
2427 accum = 0;
2428 }
2429 }
2430
2431 if (accum)
2432 return accum;
2433
6c79e987
MS		 2434 map = &sbi->s_partmaps[sbi->s_partition];
2435 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2436 accum += udf_count_free_bitmap(sb,
6c79e987 2437 map->s_uspace.s_bitmap);
1da177e4 2438 }
6c79e987 2439 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2440 accum += udf_count_free_bitmap(sb,
6c79e987 2441 map->s_fspace.s_bitmap);
1da177e4
LT		 2442 }
2443 if (accum)
2444 return accum;
2445
6c79e987 2446 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2447 accum += udf_count_free_table(sb,
6c79e987 2448 map->s_uspace.s_table);
1da177e4 2449 }
6c79e987 2450 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2451 accum += udf_count_free_table(sb,
6c79e987 2452 map->s_fspace.s_table);
1da177e4
LT		 2453 }
2454
2455 return accum;
2456}
Linux kernel - Deliverables
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