5 * Super block routines for the OSTA-UDF(tm) filesystem.
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
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/
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.
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
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
36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
38 * 12/20/98 find the free space bitmap (if it exists)
43 #include <linux/blkdev.h>
44 #include <linux/slab.h>
45 #include <linux/kernel.h>
46 #include <linux/module.h>
47 #include <linux/parser.h>
48 #include <linux/stat.h>
49 #include <linux/cdrom.h>
50 #include <linux/nls.h>
51 #include <linux/buffer_head.h>
52 #include <linux/vfs.h>
53 #include <linux/vmalloc.h>
54 #include <linux/errno.h>
55 #include <linux/mount.h>
56 #include <linux/seq_file.h>
57 #include <linux/bitmap.h>
58 #include <linux/crc-itu-t.h>
59 #include <linux/log2.h>
60 #include <asm/byteorder.h>
65 #include <linux/init.h>
66 #include <asm/uaccess.h>
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
77 #define UDF_DEFAULT_BLOCKSIZE 2048
79 enum { UDF_MAX_LINKS
= 0xffff };
81 /* These are the "meat" - everything else is stuffing */
82 static int udf_fill_super(struct super_block
*, void *, int);
83 static void udf_put_super(struct super_block
*);
84 static int udf_sync_fs(struct super_block
*, int);
85 static int udf_remount_fs(struct super_block
*, int *, char *);
86 static void udf_load_logicalvolint(struct super_block
*, struct kernel_extent_ad
);
87 static int udf_find_fileset(struct super_block
*, struct kernel_lb_addr
*,
88 struct kernel_lb_addr
*);
89 static void udf_load_fileset(struct super_block
*, struct buffer_head
*,
90 struct kernel_lb_addr
*);
91 static void udf_open_lvid(struct super_block
*);
92 static void udf_close_lvid(struct super_block
*);
93 static unsigned int udf_count_free(struct super_block
*);
94 static int udf_statfs(struct dentry
*, struct kstatfs
*);
95 static int udf_show_options(struct seq_file
*, struct dentry
*);
97 struct logicalVolIntegrityDescImpUse
*udf_sb_lvidiu(struct udf_sb_info
*sbi
)
99 struct logicalVolIntegrityDesc
*lvid
=
100 (struct logicalVolIntegrityDesc
*)sbi
->s_lvid_bh
->b_data
;
101 __u32 number_of_partitions
= le32_to_cpu(lvid
->numOfPartitions
);
102 __u32 offset
= number_of_partitions
* 2 *
103 sizeof(uint32_t)/sizeof(uint8_t);
104 return (struct logicalVolIntegrityDescImpUse
*)&(lvid
->impUse
[offset
]);
107 /* UDF filesystem type */
108 static struct dentry
*udf_mount(struct file_system_type
*fs_type
,
109 int flags
, const char *dev_name
, void *data
)
111 return mount_bdev(fs_type
, flags
, dev_name
, data
, udf_fill_super
);
114 static struct file_system_type udf_fstype
= {
115 .owner
= THIS_MODULE
,
118 .kill_sb
= kill_block_super
,
119 .fs_flags
= FS_REQUIRES_DEV
,
121 MODULE_ALIAS_FS("udf");
123 static struct kmem_cache
*udf_inode_cachep
;
125 static struct inode
*udf_alloc_inode(struct super_block
*sb
)
127 struct udf_inode_info
*ei
;
128 ei
= kmem_cache_alloc(udf_inode_cachep
, GFP_KERNEL
);
133 ei
->i_lenExtents
= 0;
134 ei
->i_next_alloc_block
= 0;
135 ei
->i_next_alloc_goal
= 0;
137 init_rwsem(&ei
->i_data_sem
);
138 ei
->cached_extent
.lstart
= -1;
139 spin_lock_init(&ei
->i_extent_cache_lock
);
141 return &ei
->vfs_inode
;
144 static void udf_i_callback(struct rcu_head
*head
)
146 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
147 kmem_cache_free(udf_inode_cachep
, UDF_I(inode
));
150 static void udf_destroy_inode(struct inode
*inode
)
152 call_rcu(&inode
->i_rcu
, udf_i_callback
);
155 static void init_once(void *foo
)
157 struct udf_inode_info
*ei
= (struct udf_inode_info
*)foo
;
159 ei
->i_ext
.i_data
= NULL
;
160 inode_init_once(&ei
->vfs_inode
);
163 static int init_inodecache(void)
165 udf_inode_cachep
= kmem_cache_create("udf_inode_cache",
166 sizeof(struct udf_inode_info
),
167 0, (SLAB_RECLAIM_ACCOUNT
|
170 if (!udf_inode_cachep
)
175 static void destroy_inodecache(void)
178 * Make sure all delayed rcu free inodes are flushed before we
182 kmem_cache_destroy(udf_inode_cachep
);
185 /* Superblock operations */
186 static const struct super_operations udf_sb_ops
= {
187 .alloc_inode
= udf_alloc_inode
,
188 .destroy_inode
= udf_destroy_inode
,
189 .write_inode
= udf_write_inode
,
190 .evict_inode
= udf_evict_inode
,
191 .put_super
= udf_put_super
,
192 .sync_fs
= udf_sync_fs
,
193 .statfs
= udf_statfs
,
194 .remount_fs
= udf_remount_fs
,
195 .show_options
= udf_show_options
,
200 unsigned int blocksize
;
201 unsigned int session
;
202 unsigned int lastblock
;
205 unsigned short partition
;
206 unsigned int fileset
;
207 unsigned int rootdir
;
214 struct nls_table
*nls_map
;
217 static int __init
init_udf_fs(void)
221 err
= init_inodecache();
224 err
= register_filesystem(&udf_fstype
);
231 destroy_inodecache();
237 static void __exit
exit_udf_fs(void)
239 unregister_filesystem(&udf_fstype
);
240 destroy_inodecache();
243 module_init(init_udf_fs
)
244 module_exit(exit_udf_fs
)
246 static int udf_sb_alloc_partition_maps(struct super_block
*sb
, u32 count
)
248 struct udf_sb_info
*sbi
= UDF_SB(sb
);
250 sbi
->s_partmaps
= kcalloc(count
, sizeof(struct udf_part_map
),
252 if (!sbi
->s_partmaps
) {
253 udf_err(sb
, "Unable to allocate space for %d partition maps\n",
255 sbi
->s_partitions
= 0;
259 sbi
->s_partitions
= count
;
263 static void udf_sb_free_bitmap(struct udf_bitmap
*bitmap
)
266 int nr_groups
= bitmap
->s_nr_groups
;
267 int size
= sizeof(struct udf_bitmap
) + (sizeof(struct buffer_head
*) *
270 for (i
= 0; i
< nr_groups
; i
++)
271 if (bitmap
->s_block_bitmap
[i
])
272 brelse(bitmap
->s_block_bitmap
[i
]);
274 if (size
<= PAGE_SIZE
)
280 static void udf_free_partition(struct udf_part_map
*map
)
283 struct udf_meta_data
*mdata
;
285 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
)
286 iput(map
->s_uspace
.s_table
);
287 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
)
288 iput(map
->s_fspace
.s_table
);
289 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
)
290 udf_sb_free_bitmap(map
->s_uspace
.s_bitmap
);
291 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
)
292 udf_sb_free_bitmap(map
->s_fspace
.s_bitmap
);
293 if (map
->s_partition_type
== UDF_SPARABLE_MAP15
)
294 for (i
= 0; i
< 4; i
++)
295 brelse(map
->s_type_specific
.s_sparing
.s_spar_map
[i
]);
296 else if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
297 mdata
= &map
->s_type_specific
.s_metadata
;
298 iput(mdata
->s_metadata_fe
);
299 mdata
->s_metadata_fe
= NULL
;
301 iput(mdata
->s_mirror_fe
);
302 mdata
->s_mirror_fe
= NULL
;
304 iput(mdata
->s_bitmap_fe
);
305 mdata
->s_bitmap_fe
= NULL
;
309 static void udf_sb_free_partitions(struct super_block
*sb
)
311 struct udf_sb_info
*sbi
= UDF_SB(sb
);
313 if (sbi
->s_partmaps
== NULL
)
315 for (i
= 0; i
< sbi
->s_partitions
; i
++)
316 udf_free_partition(&sbi
->s_partmaps
[i
]);
317 kfree(sbi
->s_partmaps
);
318 sbi
->s_partmaps
= NULL
;
321 static int udf_show_options(struct seq_file
*seq
, struct dentry
*root
)
323 struct super_block
*sb
= root
->d_sb
;
324 struct udf_sb_info
*sbi
= UDF_SB(sb
);
326 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_STRICT
))
327 seq_puts(seq
, ",nostrict");
328 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_BLOCKSIZE_SET
))
329 seq_printf(seq
, ",bs=%lu", sb
->s_blocksize
);
330 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNHIDE
))
331 seq_puts(seq
, ",unhide");
332 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNDELETE
))
333 seq_puts(seq
, ",undelete");
334 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_AD_IN_ICB
))
335 seq_puts(seq
, ",noadinicb");
336 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_SHORT_AD
))
337 seq_puts(seq
, ",shortad");
338 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_FORGET
))
339 seq_puts(seq
, ",uid=forget");
340 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_IGNORE
))
341 seq_puts(seq
, ",uid=ignore");
342 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_FORGET
))
343 seq_puts(seq
, ",gid=forget");
344 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_IGNORE
))
345 seq_puts(seq
, ",gid=ignore");
346 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_SET
))
347 seq_printf(seq
, ",uid=%u", from_kuid(&init_user_ns
, sbi
->s_uid
));
348 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_SET
))
349 seq_printf(seq
, ",gid=%u", from_kgid(&init_user_ns
, sbi
->s_gid
));
350 if (sbi
->s_umask
!= 0)
351 seq_printf(seq
, ",umask=%ho", sbi
->s_umask
);
352 if (sbi
->s_fmode
!= UDF_INVALID_MODE
)
353 seq_printf(seq
, ",mode=%ho", sbi
->s_fmode
);
354 if (sbi
->s_dmode
!= UDF_INVALID_MODE
)
355 seq_printf(seq
, ",dmode=%ho", sbi
->s_dmode
);
356 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_SESSION_SET
))
357 seq_printf(seq
, ",session=%u", sbi
->s_session
);
358 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_LASTBLOCK_SET
))
359 seq_printf(seq
, ",lastblock=%u", sbi
->s_last_block
);
360 if (sbi
->s_anchor
!= 0)
361 seq_printf(seq
, ",anchor=%u", sbi
->s_anchor
);
363 * volume, partition, fileset and rootdir seem to be ignored
366 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UTF8
))
367 seq_puts(seq
, ",utf8");
368 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
) && sbi
->s_nls_map
)
369 seq_printf(seq
, ",iocharset=%s", sbi
->s_nls_map
->charset
);
378 * Parse mount options.
381 * The following mount options are supported:
383 * gid= Set the default group.
384 * umask= Set the default umask.
385 * mode= Set the default file permissions.
386 * dmode= Set the default directory permissions.
387 * uid= Set the default user.
388 * bs= Set the block size.
389 * unhide Show otherwise hidden files.
390 * undelete Show deleted files in lists.
391 * adinicb Embed data in the inode (default)
392 * noadinicb Don't embed data in the inode
393 * shortad Use short ad's
394 * longad Use long ad's (default)
395 * nostrict Unset strict conformance
396 * iocharset= Set the NLS character set
398 * The remaining are for debugging and disaster recovery:
400 * novrs Skip volume sequence recognition
402 * The following expect a offset from 0.
404 * session= Set the CDROM session (default= last session)
405 * anchor= Override standard anchor location. (default= 256)
406 * volume= Override the VolumeDesc location. (unused)
407 * partition= Override the PartitionDesc location. (unused)
408 * lastblock= Set the last block of the filesystem/
410 * The following expect a offset from the partition root.
412 * fileset= Override the fileset block location. (unused)
413 * rootdir= Override the root directory location. (unused)
414 * WARNING: overriding the rootdir to a non-directory may
415 * yield highly unpredictable results.
418 * options Pointer to mount options string.
419 * uopts Pointer to mount options variable.
422 * <return> 1 Mount options parsed okay.
423 * <return> 0 Error parsing mount options.
426 * July 1, 1997 - Andrew E. Mileski
427 * Written, tested, and released.
431 Opt_novrs
, Opt_nostrict
, Opt_bs
, Opt_unhide
, Opt_undelete
,
432 Opt_noadinicb
, Opt_adinicb
, Opt_shortad
, Opt_longad
,
433 Opt_gid
, Opt_uid
, Opt_umask
, Opt_session
, Opt_lastblock
,
434 Opt_anchor
, Opt_volume
, Opt_partition
, Opt_fileset
,
435 Opt_rootdir
, Opt_utf8
, Opt_iocharset
,
436 Opt_err
, Opt_uforget
, Opt_uignore
, Opt_gforget
, Opt_gignore
,
440 static const match_table_t tokens
= {
441 {Opt_novrs
, "novrs"},
442 {Opt_nostrict
, "nostrict"},
444 {Opt_unhide
, "unhide"},
445 {Opt_undelete
, "undelete"},
446 {Opt_noadinicb
, "noadinicb"},
447 {Opt_adinicb
, "adinicb"},
448 {Opt_shortad
, "shortad"},
449 {Opt_longad
, "longad"},
450 {Opt_uforget
, "uid=forget"},
451 {Opt_uignore
, "uid=ignore"},
452 {Opt_gforget
, "gid=forget"},
453 {Opt_gignore
, "gid=ignore"},
456 {Opt_umask
, "umask=%o"},
457 {Opt_session
, "session=%u"},
458 {Opt_lastblock
, "lastblock=%u"},
459 {Opt_anchor
, "anchor=%u"},
460 {Opt_volume
, "volume=%u"},
461 {Opt_partition
, "partition=%u"},
462 {Opt_fileset
, "fileset=%u"},
463 {Opt_rootdir
, "rootdir=%u"},
465 {Opt_iocharset
, "iocharset=%s"},
466 {Opt_fmode
, "mode=%o"},
467 {Opt_dmode
, "dmode=%o"},
471 static int udf_parse_options(char *options
, struct udf_options
*uopt
,
478 uopt
->partition
= 0xFFFF;
479 uopt
->session
= 0xFFFFFFFF;
482 uopt
->volume
= 0xFFFFFFFF;
483 uopt
->rootdir
= 0xFFFFFFFF;
484 uopt
->fileset
= 0xFFFFFFFF;
485 uopt
->nls_map
= NULL
;
490 while ((p
= strsep(&options
, ",")) != NULL
) {
491 substring_t args
[MAX_OPT_ARGS
];
496 token
= match_token(p
, tokens
, args
);
502 if (match_int(&args
[0], &option
))
504 uopt
->blocksize
= option
;
505 uopt
->flags
|= (1 << UDF_FLAG_BLOCKSIZE_SET
);
508 uopt
->flags
|= (1 << UDF_FLAG_UNHIDE
);
511 uopt
->flags
|= (1 << UDF_FLAG_UNDELETE
);
514 uopt
->flags
&= ~(1 << UDF_FLAG_USE_AD_IN_ICB
);
517 uopt
->flags
|= (1 << UDF_FLAG_USE_AD_IN_ICB
);
520 uopt
->flags
|= (1 << UDF_FLAG_USE_SHORT_AD
);
523 uopt
->flags
&= ~(1 << UDF_FLAG_USE_SHORT_AD
);
526 if (match_int(args
, &option
))
528 uopt
->gid
= make_kgid(current_user_ns(), option
);
529 if (!gid_valid(uopt
->gid
))
531 uopt
->flags
|= (1 << UDF_FLAG_GID_SET
);
534 if (match_int(args
, &option
))
536 uopt
->uid
= make_kuid(current_user_ns(), option
);
537 if (!uid_valid(uopt
->uid
))
539 uopt
->flags
|= (1 << UDF_FLAG_UID_SET
);
542 if (match_octal(args
, &option
))
544 uopt
->umask
= option
;
547 uopt
->flags
&= ~(1 << UDF_FLAG_STRICT
);
550 if (match_int(args
, &option
))
552 uopt
->session
= option
;
554 uopt
->flags
|= (1 << UDF_FLAG_SESSION_SET
);
557 if (match_int(args
, &option
))
559 uopt
->lastblock
= option
;
561 uopt
->flags
|= (1 << UDF_FLAG_LASTBLOCK_SET
);
564 if (match_int(args
, &option
))
566 uopt
->anchor
= option
;
569 if (match_int(args
, &option
))
571 uopt
->volume
= option
;
574 if (match_int(args
, &option
))
576 uopt
->partition
= option
;
579 if (match_int(args
, &option
))
581 uopt
->fileset
= option
;
584 if (match_int(args
, &option
))
586 uopt
->rootdir
= option
;
589 uopt
->flags
|= (1 << UDF_FLAG_UTF8
);
591 #ifdef CONFIG_UDF_NLS
593 uopt
->nls_map
= load_nls(args
[0].from
);
594 uopt
->flags
|= (1 << UDF_FLAG_NLS_MAP
);
598 uopt
->flags
|= (1 << UDF_FLAG_UID_IGNORE
);
601 uopt
->flags
|= (1 << UDF_FLAG_UID_FORGET
);
604 uopt
->flags
|= (1 << UDF_FLAG_GID_IGNORE
);
607 uopt
->flags
|= (1 << UDF_FLAG_GID_FORGET
);
610 if (match_octal(args
, &option
))
612 uopt
->fmode
= option
& 0777;
615 if (match_octal(args
, &option
))
617 uopt
->dmode
= option
& 0777;
620 pr_err("bad mount option \"%s\" or missing value\n", p
);
627 static int udf_remount_fs(struct super_block
*sb
, int *flags
, char *options
)
629 struct udf_options uopt
;
630 struct udf_sb_info
*sbi
= UDF_SB(sb
);
633 if (sbi
->s_lvid_bh
) {
634 int write_rev
= le16_to_cpu(udf_sb_lvidiu(sbi
)->minUDFWriteRev
);
635 if (write_rev
> UDF_MAX_WRITE_VERSION
&& !(*flags
& MS_RDONLY
))
639 uopt
.flags
= sbi
->s_flags
;
640 uopt
.uid
= sbi
->s_uid
;
641 uopt
.gid
= sbi
->s_gid
;
642 uopt
.umask
= sbi
->s_umask
;
643 uopt
.fmode
= sbi
->s_fmode
;
644 uopt
.dmode
= sbi
->s_dmode
;
646 if (!udf_parse_options(options
, &uopt
, true))
649 write_lock(&sbi
->s_cred_lock
);
650 sbi
->s_flags
= uopt
.flags
;
651 sbi
->s_uid
= uopt
.uid
;
652 sbi
->s_gid
= uopt
.gid
;
653 sbi
->s_umask
= uopt
.umask
;
654 sbi
->s_fmode
= uopt
.fmode
;
655 sbi
->s_dmode
= uopt
.dmode
;
656 write_unlock(&sbi
->s_cred_lock
);
658 if ((*flags
& MS_RDONLY
) == (sb
->s_flags
& MS_RDONLY
))
661 if (*flags
& MS_RDONLY
)
670 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
671 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
672 static loff_t
udf_check_vsd(struct super_block
*sb
)
674 struct volStructDesc
*vsd
= NULL
;
675 loff_t sector
= 32768;
677 struct buffer_head
*bh
= NULL
;
680 struct udf_sb_info
*sbi
;
683 if (sb
->s_blocksize
< sizeof(struct volStructDesc
))
684 sectorsize
= sizeof(struct volStructDesc
);
686 sectorsize
= sb
->s_blocksize
;
688 sector
+= (sbi
->s_session
<< sb
->s_blocksize_bits
);
690 udf_debug("Starting at sector %u (%ld byte sectors)\n",
691 (unsigned int)(sector
>> sb
->s_blocksize_bits
),
693 /* Process the sequence (if applicable) */
694 for (; !nsr02
&& !nsr03
; sector
+= sectorsize
) {
696 bh
= udf_tread(sb
, sector
>> sb
->s_blocksize_bits
);
700 /* Look for ISO descriptors */
701 vsd
= (struct volStructDesc
*)(bh
->b_data
+
702 (sector
& (sb
->s_blocksize
- 1)));
704 if (vsd
->stdIdent
[0] == 0) {
707 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CD001
,
709 switch (vsd
->structType
) {
711 udf_debug("ISO9660 Boot Record found\n");
714 udf_debug("ISO9660 Primary Volume Descriptor found\n");
717 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
720 udf_debug("ISO9660 Volume Partition Descriptor found\n");
723 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
726 udf_debug("ISO9660 VRS (%u) found\n",
730 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BEA01
,
733 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_TEA01
,
737 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR02
,
740 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR03
,
750 else if (sector
- (sbi
->s_session
<< sb
->s_blocksize_bits
) == 32768)
756 static int udf_find_fileset(struct super_block
*sb
,
757 struct kernel_lb_addr
*fileset
,
758 struct kernel_lb_addr
*root
)
760 struct buffer_head
*bh
= NULL
;
763 struct udf_sb_info
*sbi
;
765 if (fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
766 fileset
->partitionReferenceNum
!= 0xFFFF) {
767 bh
= udf_read_ptagged(sb
, fileset
, 0, &ident
);
771 } else if (ident
!= TAG_IDENT_FSD
) {
780 /* Search backwards through the partitions */
781 struct kernel_lb_addr newfileset
;
783 /* --> cvg: FIXME - is it reasonable? */
786 for (newfileset
.partitionReferenceNum
= sbi
->s_partitions
- 1;
787 (newfileset
.partitionReferenceNum
!= 0xFFFF &&
788 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
789 fileset
->partitionReferenceNum
== 0xFFFF);
790 newfileset
.partitionReferenceNum
--) {
791 lastblock
= sbi
->s_partmaps
792 [newfileset
.partitionReferenceNum
]
794 newfileset
.logicalBlockNum
= 0;
797 bh
= udf_read_ptagged(sb
, &newfileset
, 0,
800 newfileset
.logicalBlockNum
++;
807 struct spaceBitmapDesc
*sp
;
808 sp
= (struct spaceBitmapDesc
*)
810 newfileset
.logicalBlockNum
+= 1 +
811 ((le32_to_cpu(sp
->numOfBytes
) +
812 sizeof(struct spaceBitmapDesc
)
813 - 1) >> sb
->s_blocksize_bits
);
818 *fileset
= newfileset
;
821 newfileset
.logicalBlockNum
++;
826 } while (newfileset
.logicalBlockNum
< lastblock
&&
827 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
828 fileset
->partitionReferenceNum
== 0xFFFF);
832 if ((fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
833 fileset
->partitionReferenceNum
!= 0xFFFF) && bh
) {
834 udf_debug("Fileset at block=%d, partition=%d\n",
835 fileset
->logicalBlockNum
,
836 fileset
->partitionReferenceNum
);
838 sbi
->s_partition
= fileset
->partitionReferenceNum
;
839 udf_load_fileset(sb
, bh
, root
);
847 * Load primary Volume Descriptor Sequence
849 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
852 static int udf_load_pvoldesc(struct super_block
*sb
, sector_t block
)
854 struct primaryVolDesc
*pvoldesc
;
855 struct ustr
*instr
, *outstr
;
856 struct buffer_head
*bh
;
860 instr
= kmalloc(sizeof(struct ustr
), GFP_NOFS
);
864 outstr
= kmalloc(sizeof(struct ustr
), GFP_NOFS
);
868 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
874 if (ident
!= TAG_IDENT_PVD
) {
879 pvoldesc
= (struct primaryVolDesc
*)bh
->b_data
;
881 if (udf_disk_stamp_to_time(&UDF_SB(sb
)->s_record_time
,
882 pvoldesc
->recordingDateAndTime
)) {
884 struct timestamp
*ts
= &pvoldesc
->recordingDateAndTime
;
885 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
886 le16_to_cpu(ts
->year
), ts
->month
, ts
->day
, ts
->hour
,
887 ts
->minute
, le16_to_cpu(ts
->typeAndTimezone
));
891 if (!udf_build_ustr(instr
, pvoldesc
->volIdent
, 32))
892 if (udf_CS0toUTF8(outstr
, instr
)) {
893 strncpy(UDF_SB(sb
)->s_volume_ident
, outstr
->u_name
,
894 outstr
->u_len
> 31 ? 31 : outstr
->u_len
);
895 udf_debug("volIdent[] = '%s'\n",
896 UDF_SB(sb
)->s_volume_ident
);
899 if (!udf_build_ustr(instr
, pvoldesc
->volSetIdent
, 128))
900 if (udf_CS0toUTF8(outstr
, instr
))
901 udf_debug("volSetIdent[] = '%s'\n", outstr
->u_name
);
913 struct inode
*udf_find_metadata_inode_efe(struct super_block
*sb
,
914 u32 meta_file_loc
, u32 partition_num
)
916 struct kernel_lb_addr addr
;
917 struct inode
*metadata_fe
;
919 addr
.logicalBlockNum
= meta_file_loc
;
920 addr
.partitionReferenceNum
= partition_num
;
922 metadata_fe
= udf_iget(sb
, &addr
);
924 if (metadata_fe
== NULL
)
925 udf_warn(sb
, "metadata inode efe not found\n");
926 else if (UDF_I(metadata_fe
)->i_alloc_type
!= ICBTAG_FLAG_AD_SHORT
) {
927 udf_warn(sb
, "metadata inode efe does not have short allocation descriptors!\n");
935 static int udf_load_metadata_files(struct super_block
*sb
, int partition
)
937 struct udf_sb_info
*sbi
= UDF_SB(sb
);
938 struct udf_part_map
*map
;
939 struct udf_meta_data
*mdata
;
940 struct kernel_lb_addr addr
;
942 map
= &sbi
->s_partmaps
[partition
];
943 mdata
= &map
->s_type_specific
.s_metadata
;
945 /* metadata address */
946 udf_debug("Metadata file location: block = %d part = %d\n",
947 mdata
->s_meta_file_loc
, map
->s_partition_num
);
949 mdata
->s_metadata_fe
= udf_find_metadata_inode_efe(sb
,
950 mdata
->s_meta_file_loc
, map
->s_partition_num
);
952 if (mdata
->s_metadata_fe
== NULL
) {
953 /* mirror file entry */
954 udf_debug("Mirror metadata file location: block = %d part = %d\n",
955 mdata
->s_mirror_file_loc
, map
->s_partition_num
);
957 mdata
->s_mirror_fe
= udf_find_metadata_inode_efe(sb
,
958 mdata
->s_mirror_file_loc
, map
->s_partition_num
);
960 if (mdata
->s_mirror_fe
== NULL
) {
961 udf_err(sb
, "Both metadata and mirror metadata inode efe can not found\n");
969 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
971 if (mdata
->s_bitmap_file_loc
!= 0xFFFFFFFF) {
972 addr
.logicalBlockNum
= mdata
->s_bitmap_file_loc
;
973 addr
.partitionReferenceNum
= map
->s_partition_num
;
975 udf_debug("Bitmap file location: block = %d part = %d\n",
976 addr
.logicalBlockNum
, addr
.partitionReferenceNum
);
978 mdata
->s_bitmap_fe
= udf_iget(sb
, &addr
);
979 if (mdata
->s_bitmap_fe
== NULL
) {
980 if (sb
->s_flags
& MS_RDONLY
)
981 udf_warn(sb
, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
983 udf_err(sb
, "bitmap inode efe not found and attempted read-write mount\n");
989 udf_debug("udf_load_metadata_files Ok\n");
993 static void udf_load_fileset(struct super_block
*sb
, struct buffer_head
*bh
,
994 struct kernel_lb_addr
*root
)
996 struct fileSetDesc
*fset
;
998 fset
= (struct fileSetDesc
*)bh
->b_data
;
1000 *root
= lelb_to_cpu(fset
->rootDirectoryICB
.extLocation
);
1002 UDF_SB(sb
)->s_serial_number
= le16_to_cpu(fset
->descTag
.tagSerialNum
);
1004 udf_debug("Rootdir at block=%d, partition=%d\n",
1005 root
->logicalBlockNum
, root
->partitionReferenceNum
);
1008 int udf_compute_nr_groups(struct super_block
*sb
, u32 partition
)
1010 struct udf_part_map
*map
= &UDF_SB(sb
)->s_partmaps
[partition
];
1011 return DIV_ROUND_UP(map
->s_partition_len
+
1012 (sizeof(struct spaceBitmapDesc
) << 3),
1013 sb
->s_blocksize
* 8);
1016 static struct udf_bitmap
*udf_sb_alloc_bitmap(struct super_block
*sb
, u32 index
)
1018 struct udf_bitmap
*bitmap
;
1022 nr_groups
= udf_compute_nr_groups(sb
, index
);
1023 size
= sizeof(struct udf_bitmap
) +
1024 (sizeof(struct buffer_head
*) * nr_groups
);
1026 if (size
<= PAGE_SIZE
)
1027 bitmap
= kzalloc(size
, GFP_KERNEL
);
1029 bitmap
= vzalloc(size
); /* TODO: get rid of vzalloc */
1034 bitmap
->s_nr_groups
= nr_groups
;
1038 static int udf_fill_partdesc_info(struct super_block
*sb
,
1039 struct partitionDesc
*p
, int p_index
)
1041 struct udf_part_map
*map
;
1042 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1043 struct partitionHeaderDesc
*phd
;
1045 map
= &sbi
->s_partmaps
[p_index
];
1047 map
->s_partition_len
= le32_to_cpu(p
->partitionLength
); /* blocks */
1048 map
->s_partition_root
= le32_to_cpu(p
->partitionStartingLocation
);
1050 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY
))
1051 map
->s_partition_flags
|= UDF_PART_FLAG_READ_ONLY
;
1052 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE
))
1053 map
->s_partition_flags
|= UDF_PART_FLAG_WRITE_ONCE
;
1054 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE
))
1055 map
->s_partition_flags
|= UDF_PART_FLAG_REWRITABLE
;
1056 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE
))
1057 map
->s_partition_flags
|= UDF_PART_FLAG_OVERWRITABLE
;
1059 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1060 p_index
, map
->s_partition_type
,
1061 map
->s_partition_root
, map
->s_partition_len
);
1063 if (strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR02
) &&
1064 strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR03
))
1067 phd
= (struct partitionHeaderDesc
*)p
->partitionContentsUse
;
1068 if (phd
->unallocSpaceTable
.extLength
) {
1069 struct kernel_lb_addr loc
= {
1070 .logicalBlockNum
= le32_to_cpu(
1071 phd
->unallocSpaceTable
.extPosition
),
1072 .partitionReferenceNum
= p_index
,
1075 map
->s_uspace
.s_table
= udf_iget(sb
, &loc
);
1076 if (!map
->s_uspace
.s_table
) {
1077 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1081 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_TABLE
;
1082 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1083 p_index
, map
->s_uspace
.s_table
->i_ino
);
1086 if (phd
->unallocSpaceBitmap
.extLength
) {
1087 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1090 map
->s_uspace
.s_bitmap
= bitmap
;
1091 bitmap
->s_extPosition
= le32_to_cpu(
1092 phd
->unallocSpaceBitmap
.extPosition
);
1093 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_BITMAP
;
1094 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1095 p_index
, bitmap
->s_extPosition
);
1098 if (phd
->partitionIntegrityTable
.extLength
)
1099 udf_debug("partitionIntegrityTable (part %d)\n", p_index
);
1101 if (phd
->freedSpaceTable
.extLength
) {
1102 struct kernel_lb_addr loc
= {
1103 .logicalBlockNum
= le32_to_cpu(
1104 phd
->freedSpaceTable
.extPosition
),
1105 .partitionReferenceNum
= p_index
,
1108 map
->s_fspace
.s_table
= udf_iget(sb
, &loc
);
1109 if (!map
->s_fspace
.s_table
) {
1110 udf_debug("cannot load freedSpaceTable (part %d)\n",
1115 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_TABLE
;
1116 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1117 p_index
, map
->s_fspace
.s_table
->i_ino
);
1120 if (phd
->freedSpaceBitmap
.extLength
) {
1121 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1124 map
->s_fspace
.s_bitmap
= bitmap
;
1125 bitmap
->s_extPosition
= le32_to_cpu(
1126 phd
->freedSpaceBitmap
.extPosition
);
1127 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_BITMAP
;
1128 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1129 p_index
, bitmap
->s_extPosition
);
1134 static void udf_find_vat_block(struct super_block
*sb
, int p_index
,
1135 int type1_index
, sector_t start_block
)
1137 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1138 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1140 struct kernel_lb_addr ino
;
1143 * VAT file entry is in the last recorded block. Some broken disks have
1144 * it a few blocks before so try a bit harder...
1146 ino
.partitionReferenceNum
= type1_index
;
1147 for (vat_block
= start_block
;
1148 vat_block
>= map
->s_partition_root
&&
1149 vat_block
>= start_block
- 3 &&
1150 !sbi
->s_vat_inode
; vat_block
--) {
1151 ino
.logicalBlockNum
= vat_block
- map
->s_partition_root
;
1152 sbi
->s_vat_inode
= udf_iget(sb
, &ino
);
1156 static int udf_load_vat(struct super_block
*sb
, int p_index
, int type1_index
)
1158 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1159 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1160 struct buffer_head
*bh
= NULL
;
1161 struct udf_inode_info
*vati
;
1163 struct virtualAllocationTable20
*vat20
;
1164 sector_t blocks
= sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
;
1166 udf_find_vat_block(sb
, p_index
, type1_index
, sbi
->s_last_block
);
1167 if (!sbi
->s_vat_inode
&&
1168 sbi
->s_last_block
!= blocks
- 1) {
1169 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1170 (unsigned long)sbi
->s_last_block
,
1171 (unsigned long)blocks
- 1);
1172 udf_find_vat_block(sb
, p_index
, type1_index
, blocks
- 1);
1174 if (!sbi
->s_vat_inode
)
1177 if (map
->s_partition_type
== UDF_VIRTUAL_MAP15
) {
1178 map
->s_type_specific
.s_virtual
.s_start_offset
= 0;
1179 map
->s_type_specific
.s_virtual
.s_num_entries
=
1180 (sbi
->s_vat_inode
->i_size
- 36) >> 2;
1181 } else if (map
->s_partition_type
== UDF_VIRTUAL_MAP20
) {
1182 vati
= UDF_I(sbi
->s_vat_inode
);
1183 if (vati
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
1184 pos
= udf_block_map(sbi
->s_vat_inode
, 0);
1185 bh
= sb_bread(sb
, pos
);
1188 vat20
= (struct virtualAllocationTable20
*)bh
->b_data
;
1190 vat20
= (struct virtualAllocationTable20
*)
1194 map
->s_type_specific
.s_virtual
.s_start_offset
=
1195 le16_to_cpu(vat20
->lengthHeader
);
1196 map
->s_type_specific
.s_virtual
.s_num_entries
=
1197 (sbi
->s_vat_inode
->i_size
-
1198 map
->s_type_specific
.s_virtual
.
1199 s_start_offset
) >> 2;
1206 * Load partition descriptor block
1208 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1211 static int udf_load_partdesc(struct super_block
*sb
, sector_t block
)
1213 struct buffer_head
*bh
;
1214 struct partitionDesc
*p
;
1215 struct udf_part_map
*map
;
1216 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1218 uint16_t partitionNumber
;
1222 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1225 if (ident
!= TAG_IDENT_PD
) {
1230 p
= (struct partitionDesc
*)bh
->b_data
;
1231 partitionNumber
= le16_to_cpu(p
->partitionNumber
);
1233 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1234 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1235 map
= &sbi
->s_partmaps
[i
];
1236 udf_debug("Searching map: (%d == %d)\n",
1237 map
->s_partition_num
, partitionNumber
);
1238 if (map
->s_partition_num
== partitionNumber
&&
1239 (map
->s_partition_type
== UDF_TYPE1_MAP15
||
1240 map
->s_partition_type
== UDF_SPARABLE_MAP15
))
1244 if (i
>= sbi
->s_partitions
) {
1245 udf_debug("Partition (%d) not found in partition map\n",
1251 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1256 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1257 * PHYSICAL partitions are already set up
1260 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1261 map
= &sbi
->s_partmaps
[i
];
1263 if (map
->s_partition_num
== partitionNumber
&&
1264 (map
->s_partition_type
== UDF_VIRTUAL_MAP15
||
1265 map
->s_partition_type
== UDF_VIRTUAL_MAP20
||
1266 map
->s_partition_type
== UDF_METADATA_MAP25
))
1270 if (i
>= sbi
->s_partitions
) {
1275 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1279 if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
1280 ret
= udf_load_metadata_files(sb
, i
);
1282 udf_err(sb
, "error loading MetaData partition map %d\n",
1288 * If we have a partition with virtual map, we don't handle
1289 * writing to it (we overwrite blocks instead of relocating
1292 if (!(sb
->s_flags
& MS_RDONLY
)) {
1296 ret
= udf_load_vat(sb
, i
, type1_idx
);
1302 /* In case loading failed, we handle cleanup in udf_fill_super */
1307 static int udf_load_sparable_map(struct super_block
*sb
,
1308 struct udf_part_map
*map
,
1309 struct sparablePartitionMap
*spm
)
1313 struct sparingTable
*st
;
1314 struct udf_sparing_data
*sdata
= &map
->s_type_specific
.s_sparing
;
1316 struct buffer_head
*bh
;
1318 map
->s_partition_type
= UDF_SPARABLE_MAP15
;
1319 sdata
->s_packet_len
= le16_to_cpu(spm
->packetLength
);
1320 if (!is_power_of_2(sdata
->s_packet_len
)) {
1321 udf_err(sb
, "error loading logical volume descriptor: "
1322 "Invalid packet length %u\n",
1323 (unsigned)sdata
->s_packet_len
);
1326 if (spm
->numSparingTables
> 4) {
1327 udf_err(sb
, "error loading logical volume descriptor: "
1328 "Too many sparing tables (%d)\n",
1329 (int)spm
->numSparingTables
);
1333 for (i
= 0; i
< spm
->numSparingTables
; i
++) {
1334 loc
= le32_to_cpu(spm
->locSparingTable
[i
]);
1335 bh
= udf_read_tagged(sb
, loc
, loc
, &ident
);
1339 st
= (struct sparingTable
*)bh
->b_data
;
1341 strncmp(st
->sparingIdent
.ident
, UDF_ID_SPARING
,
1342 strlen(UDF_ID_SPARING
)) ||
1343 sizeof(*st
) + le16_to_cpu(st
->reallocationTableLen
) >
1349 sdata
->s_spar_map
[i
] = bh
;
1351 map
->s_partition_func
= udf_get_pblock_spar15
;
1355 static int udf_load_logicalvol(struct super_block
*sb
, sector_t block
,
1356 struct kernel_lb_addr
*fileset
)
1358 struct logicalVolDesc
*lvd
;
1361 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1362 struct genericPartitionMap
*gpm
;
1364 struct buffer_head
*bh
;
1365 unsigned int table_len
;
1368 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1371 BUG_ON(ident
!= TAG_IDENT_LVD
);
1372 lvd
= (struct logicalVolDesc
*)bh
->b_data
;
1373 table_len
= le32_to_cpu(lvd
->mapTableLength
);
1374 if (table_len
> sb
->s_blocksize
- sizeof(*lvd
)) {
1375 udf_err(sb
, "error loading logical volume descriptor: "
1376 "Partition table too long (%u > %lu)\n", table_len
,
1377 sb
->s_blocksize
- sizeof(*lvd
));
1382 ret
= udf_sb_alloc_partition_maps(sb
, le32_to_cpu(lvd
->numPartitionMaps
));
1386 for (i
= 0, offset
= 0;
1387 i
< sbi
->s_partitions
&& offset
< table_len
;
1388 i
++, offset
+= gpm
->partitionMapLength
) {
1389 struct udf_part_map
*map
= &sbi
->s_partmaps
[i
];
1390 gpm
= (struct genericPartitionMap
*)
1391 &(lvd
->partitionMaps
[offset
]);
1392 type
= gpm
->partitionMapType
;
1394 struct genericPartitionMap1
*gpm1
=
1395 (struct genericPartitionMap1
*)gpm
;
1396 map
->s_partition_type
= UDF_TYPE1_MAP15
;
1397 map
->s_volumeseqnum
= le16_to_cpu(gpm1
->volSeqNum
);
1398 map
->s_partition_num
= le16_to_cpu(gpm1
->partitionNum
);
1399 map
->s_partition_func
= NULL
;
1400 } else if (type
== 2) {
1401 struct udfPartitionMap2
*upm2
=
1402 (struct udfPartitionMap2
*)gpm
;
1403 if (!strncmp(upm2
->partIdent
.ident
, UDF_ID_VIRTUAL
,
1404 strlen(UDF_ID_VIRTUAL
))) {
1406 le16_to_cpu(((__le16
*)upm2
->partIdent
.
1409 map
->s_partition_type
=
1411 map
->s_partition_func
=
1412 udf_get_pblock_virt15
;
1414 map
->s_partition_type
=
1416 map
->s_partition_func
=
1417 udf_get_pblock_virt20
;
1419 } else if (!strncmp(upm2
->partIdent
.ident
,
1421 strlen(UDF_ID_SPARABLE
))) {
1422 ret
= udf_load_sparable_map(sb
, map
,
1423 (struct sparablePartitionMap
*)gpm
);
1426 } else if (!strncmp(upm2
->partIdent
.ident
,
1428 strlen(UDF_ID_METADATA
))) {
1429 struct udf_meta_data
*mdata
=
1430 &map
->s_type_specific
.s_metadata
;
1431 struct metadataPartitionMap
*mdm
=
1432 (struct metadataPartitionMap
*)
1433 &(lvd
->partitionMaps
[offset
]);
1434 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1435 i
, type
, UDF_ID_METADATA
);
1437 map
->s_partition_type
= UDF_METADATA_MAP25
;
1438 map
->s_partition_func
= udf_get_pblock_meta25
;
1440 mdata
->s_meta_file_loc
=
1441 le32_to_cpu(mdm
->metadataFileLoc
);
1442 mdata
->s_mirror_file_loc
=
1443 le32_to_cpu(mdm
->metadataMirrorFileLoc
);
1444 mdata
->s_bitmap_file_loc
=
1445 le32_to_cpu(mdm
->metadataBitmapFileLoc
);
1446 mdata
->s_alloc_unit_size
=
1447 le32_to_cpu(mdm
->allocUnitSize
);
1448 mdata
->s_align_unit_size
=
1449 le16_to_cpu(mdm
->alignUnitSize
);
1450 if (mdm
->flags
& 0x01)
1451 mdata
->s_flags
|= MF_DUPLICATE_MD
;
1453 udf_debug("Metadata Ident suffix=0x%x\n",
1454 le16_to_cpu(*(__le16
*)
1455 mdm
->partIdent
.identSuffix
));
1456 udf_debug("Metadata part num=%d\n",
1457 le16_to_cpu(mdm
->partitionNum
));
1458 udf_debug("Metadata part alloc unit size=%d\n",
1459 le32_to_cpu(mdm
->allocUnitSize
));
1460 udf_debug("Metadata file loc=%d\n",
1461 le32_to_cpu(mdm
->metadataFileLoc
));
1462 udf_debug("Mirror file loc=%d\n",
1463 le32_to_cpu(mdm
->metadataMirrorFileLoc
));
1464 udf_debug("Bitmap file loc=%d\n",
1465 le32_to_cpu(mdm
->metadataBitmapFileLoc
));
1466 udf_debug("Flags: %d %d\n",
1467 mdata
->s_flags
, mdm
->flags
);
1469 udf_debug("Unknown ident: %s\n",
1470 upm2
->partIdent
.ident
);
1473 map
->s_volumeseqnum
= le16_to_cpu(upm2
->volSeqNum
);
1474 map
->s_partition_num
= le16_to_cpu(upm2
->partitionNum
);
1476 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1477 i
, map
->s_partition_num
, type
, map
->s_volumeseqnum
);
1481 struct long_ad
*la
= (struct long_ad
*)&(lvd
->logicalVolContentsUse
[0]);
1483 *fileset
= lelb_to_cpu(la
->extLocation
);
1484 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1485 fileset
->logicalBlockNum
,
1486 fileset
->partitionReferenceNum
);
1488 if (lvd
->integritySeqExt
.extLength
)
1489 udf_load_logicalvolint(sb
, leea_to_cpu(lvd
->integritySeqExt
));
1497 * udf_load_logicalvolint
1500 static void udf_load_logicalvolint(struct super_block
*sb
, struct kernel_extent_ad loc
)
1502 struct buffer_head
*bh
= NULL
;
1504 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1505 struct logicalVolIntegrityDesc
*lvid
;
1507 while (loc
.extLength
> 0 &&
1508 (bh
= udf_read_tagged(sb
, loc
.extLocation
,
1509 loc
.extLocation
, &ident
)) &&
1510 ident
== TAG_IDENT_LVID
) {
1511 sbi
->s_lvid_bh
= bh
;
1512 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1514 if (lvid
->nextIntegrityExt
.extLength
)
1515 udf_load_logicalvolint(sb
,
1516 leea_to_cpu(lvid
->nextIntegrityExt
));
1518 if (sbi
->s_lvid_bh
!= bh
)
1520 loc
.extLength
-= sb
->s_blocksize
;
1523 if (sbi
->s_lvid_bh
!= bh
)
1528 * Process a main/reserve volume descriptor sequence.
1529 * @block First block of first extent of the sequence.
1530 * @lastblock Lastblock of first extent of the sequence.
1531 * @fileset There we store extent containing root fileset
1533 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1536 static noinline
int udf_process_sequence(
1537 struct super_block
*sb
,
1538 sector_t block
, sector_t lastblock
,
1539 struct kernel_lb_addr
*fileset
)
1541 struct buffer_head
*bh
= NULL
;
1542 struct udf_vds_record vds
[VDS_POS_LENGTH
];
1543 struct udf_vds_record
*curr
;
1544 struct generic_desc
*gd
;
1545 struct volDescPtr
*vdp
;
1549 long next_s
= 0, next_e
= 0;
1552 memset(vds
, 0, sizeof(struct udf_vds_record
) * VDS_POS_LENGTH
);
1555 * Read the main descriptor sequence and find which descriptors
1558 for (; (!done
&& block
<= lastblock
); block
++) {
1560 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1563 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1564 (unsigned long long)block
);
1568 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1569 gd
= (struct generic_desc
*)bh
->b_data
;
1570 vdsn
= le32_to_cpu(gd
->volDescSeqNum
);
1572 case TAG_IDENT_PVD
: /* ISO 13346 3/10.1 */
1573 curr
= &vds
[VDS_POS_PRIMARY_VOL_DESC
];
1574 if (vdsn
>= curr
->volDescSeqNum
) {
1575 curr
->volDescSeqNum
= vdsn
;
1576 curr
->block
= block
;
1579 case TAG_IDENT_VDP
: /* ISO 13346 3/10.3 */
1580 curr
= &vds
[VDS_POS_VOL_DESC_PTR
];
1581 if (vdsn
>= curr
->volDescSeqNum
) {
1582 curr
->volDescSeqNum
= vdsn
;
1583 curr
->block
= block
;
1585 vdp
= (struct volDescPtr
*)bh
->b_data
;
1586 next_s
= le32_to_cpu(
1587 vdp
->nextVolDescSeqExt
.extLocation
);
1588 next_e
= le32_to_cpu(
1589 vdp
->nextVolDescSeqExt
.extLength
);
1590 next_e
= next_e
>> sb
->s_blocksize_bits
;
1594 case TAG_IDENT_IUVD
: /* ISO 13346 3/10.4 */
1595 curr
= &vds
[VDS_POS_IMP_USE_VOL_DESC
];
1596 if (vdsn
>= curr
->volDescSeqNum
) {
1597 curr
->volDescSeqNum
= vdsn
;
1598 curr
->block
= block
;
1601 case TAG_IDENT_PD
: /* ISO 13346 3/10.5 */
1602 curr
= &vds
[VDS_POS_PARTITION_DESC
];
1604 curr
->block
= block
;
1606 case TAG_IDENT_LVD
: /* ISO 13346 3/10.6 */
1607 curr
= &vds
[VDS_POS_LOGICAL_VOL_DESC
];
1608 if (vdsn
>= curr
->volDescSeqNum
) {
1609 curr
->volDescSeqNum
= vdsn
;
1610 curr
->block
= block
;
1613 case TAG_IDENT_USD
: /* ISO 13346 3/10.8 */
1614 curr
= &vds
[VDS_POS_UNALLOC_SPACE_DESC
];
1615 if (vdsn
>= curr
->volDescSeqNum
) {
1616 curr
->volDescSeqNum
= vdsn
;
1617 curr
->block
= block
;
1620 case TAG_IDENT_TD
: /* ISO 13346 3/10.9 */
1621 vds
[VDS_POS_TERMINATING_DESC
].block
= block
;
1625 next_s
= next_e
= 0;
1633 * Now read interesting descriptors again and process them
1634 * in a suitable order
1636 if (!vds
[VDS_POS_PRIMARY_VOL_DESC
].block
) {
1637 udf_err(sb
, "Primary Volume Descriptor not found!\n");
1640 ret
= udf_load_pvoldesc(sb
, vds
[VDS_POS_PRIMARY_VOL_DESC
].block
);
1644 if (vds
[VDS_POS_LOGICAL_VOL_DESC
].block
) {
1645 ret
= udf_load_logicalvol(sb
,
1646 vds
[VDS_POS_LOGICAL_VOL_DESC
].block
,
1652 if (vds
[VDS_POS_PARTITION_DESC
].block
) {
1654 * We rescan the whole descriptor sequence to find
1655 * partition descriptor blocks and process them.
1657 for (block
= vds
[VDS_POS_PARTITION_DESC
].block
;
1658 block
< vds
[VDS_POS_TERMINATING_DESC
].block
;
1660 ret
= udf_load_partdesc(sb
, block
);
1670 * Load Volume Descriptor Sequence described by anchor in bh
1672 * Returns <0 on error, 0 on success
1674 static int udf_load_sequence(struct super_block
*sb
, struct buffer_head
*bh
,
1675 struct kernel_lb_addr
*fileset
)
1677 struct anchorVolDescPtr
*anchor
;
1678 sector_t main_s
, main_e
, reserve_s
, reserve_e
;
1681 anchor
= (struct anchorVolDescPtr
*)bh
->b_data
;
1683 /* Locate the main sequence */
1684 main_s
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLocation
);
1685 main_e
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLength
);
1686 main_e
= main_e
>> sb
->s_blocksize_bits
;
1689 /* Locate the reserve sequence */
1690 reserve_s
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLocation
);
1691 reserve_e
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLength
);
1692 reserve_e
= reserve_e
>> sb
->s_blocksize_bits
;
1693 reserve_e
+= reserve_s
;
1695 /* Process the main & reserve sequences */
1696 /* responsible for finding the PartitionDesc(s) */
1697 ret
= udf_process_sequence(sb
, main_s
, main_e
, fileset
);
1700 udf_sb_free_partitions(sb
);
1701 ret
= udf_process_sequence(sb
, reserve_s
, reserve_e
, fileset
);
1703 udf_sb_free_partitions(sb
);
1704 /* No sequence was OK, return -EIO */
1712 * Check whether there is an anchor block in the given block and
1713 * load Volume Descriptor Sequence if so.
1715 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1718 static int udf_check_anchor_block(struct super_block
*sb
, sector_t block
,
1719 struct kernel_lb_addr
*fileset
)
1721 struct buffer_head
*bh
;
1725 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_VARCONV
) &&
1726 udf_fixed_to_variable(block
) >=
1727 sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
)
1730 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1733 if (ident
!= TAG_IDENT_AVDP
) {
1737 ret
= udf_load_sequence(sb
, bh
, fileset
);
1743 * Search for an anchor volume descriptor pointer.
1745 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1748 static int udf_scan_anchors(struct super_block
*sb
, sector_t
*lastblock
,
1749 struct kernel_lb_addr
*fileset
)
1753 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1757 /* First try user provided anchor */
1758 if (sbi
->s_anchor
) {
1759 ret
= udf_check_anchor_block(sb
, sbi
->s_anchor
, fileset
);
1764 * according to spec, anchor is in either:
1768 * however, if the disc isn't closed, it could be 512.
1770 ret
= udf_check_anchor_block(sb
, sbi
->s_session
+ 256, fileset
);
1774 * The trouble is which block is the last one. Drives often misreport
1775 * this so we try various possibilities.
1777 last
[last_count
++] = *lastblock
;
1778 if (*lastblock
>= 1)
1779 last
[last_count
++] = *lastblock
- 1;
1780 last
[last_count
++] = *lastblock
+ 1;
1781 if (*lastblock
>= 2)
1782 last
[last_count
++] = *lastblock
- 2;
1783 if (*lastblock
>= 150)
1784 last
[last_count
++] = *lastblock
- 150;
1785 if (*lastblock
>= 152)
1786 last
[last_count
++] = *lastblock
- 152;
1788 for (i
= 0; i
< last_count
; i
++) {
1789 if (last
[i
] >= sb
->s_bdev
->bd_inode
->i_size
>>
1790 sb
->s_blocksize_bits
)
1792 ret
= udf_check_anchor_block(sb
, last
[i
], fileset
);
1793 if (ret
!= -EAGAIN
) {
1795 *lastblock
= last
[i
];
1800 ret
= udf_check_anchor_block(sb
, last
[i
] - 256, fileset
);
1801 if (ret
!= -EAGAIN
) {
1803 *lastblock
= last
[i
];
1808 /* Finally try block 512 in case media is open */
1809 return udf_check_anchor_block(sb
, sbi
->s_session
+ 512, fileset
);
1813 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1814 * area specified by it. The function expects sbi->s_lastblock to be the last
1815 * block on the media.
1817 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1820 static int udf_find_anchor(struct super_block
*sb
,
1821 struct kernel_lb_addr
*fileset
)
1823 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1824 sector_t lastblock
= sbi
->s_last_block
;
1827 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1831 /* No anchor found? Try VARCONV conversion of block numbers */
1832 UDF_SET_FLAG(sb
, UDF_FLAG_VARCONV
);
1833 lastblock
= udf_variable_to_fixed(sbi
->s_last_block
);
1834 /* Firstly, we try to not convert number of the last block */
1835 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1839 lastblock
= sbi
->s_last_block
;
1840 /* Secondly, we try with converted number of the last block */
1841 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1843 /* VARCONV didn't help. Clear it. */
1844 UDF_CLEAR_FLAG(sb
, UDF_FLAG_VARCONV
);
1848 sbi
->s_last_block
= lastblock
;
1853 * Check Volume Structure Descriptor, find Anchor block and load Volume
1854 * Descriptor Sequence.
1856 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1857 * block was not found.
1859 static int udf_load_vrs(struct super_block
*sb
, struct udf_options
*uopt
,
1860 int silent
, struct kernel_lb_addr
*fileset
)
1862 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1866 if (!sb_set_blocksize(sb
, uopt
->blocksize
)) {
1868 udf_warn(sb
, "Bad block size\n");
1871 sbi
->s_last_block
= uopt
->lastblock
;
1873 /* Check that it is NSR02 compliant */
1874 nsr_off
= udf_check_vsd(sb
);
1877 udf_warn(sb
, "No VRS found\n");
1881 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
1882 if (!sbi
->s_last_block
)
1883 sbi
->s_last_block
= udf_get_last_block(sb
);
1885 udf_debug("Validity check skipped because of novrs option\n");
1888 /* Look for anchor block and load Volume Descriptor Sequence */
1889 sbi
->s_anchor
= uopt
->anchor
;
1890 ret
= udf_find_anchor(sb
, fileset
);
1892 if (!silent
&& ret
== -EAGAIN
)
1893 udf_warn(sb
, "No anchor found\n");
1899 static void udf_open_lvid(struct super_block
*sb
)
1901 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1902 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1903 struct logicalVolIntegrityDesc
*lvid
;
1904 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1909 mutex_lock(&sbi
->s_alloc_mutex
);
1910 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1911 lvidiu
= udf_sb_lvidiu(sbi
);
1913 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1914 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1915 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
,
1917 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN
);
1919 lvid
->descTag
.descCRC
= cpu_to_le16(
1920 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
1921 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
1923 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
1924 mark_buffer_dirty(bh
);
1925 sbi
->s_lvid_dirty
= 0;
1926 mutex_unlock(&sbi
->s_alloc_mutex
);
1927 /* Make opening of filesystem visible on the media immediately */
1928 sync_dirty_buffer(bh
);
1931 static void udf_close_lvid(struct super_block
*sb
)
1933 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1934 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1935 struct logicalVolIntegrityDesc
*lvid
;
1936 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1941 mutex_lock(&sbi
->s_alloc_mutex
);
1942 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1943 lvidiu
= udf_sb_lvidiu(sbi
);
1944 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1945 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1946 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, CURRENT_TIME
);
1947 if (UDF_MAX_WRITE_VERSION
> le16_to_cpu(lvidiu
->maxUDFWriteRev
))
1948 lvidiu
->maxUDFWriteRev
= cpu_to_le16(UDF_MAX_WRITE_VERSION
);
1949 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFReadRev
))
1950 lvidiu
->minUDFReadRev
= cpu_to_le16(sbi
->s_udfrev
);
1951 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFWriteRev
))
1952 lvidiu
->minUDFWriteRev
= cpu_to_le16(sbi
->s_udfrev
);
1953 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE
);
1955 lvid
->descTag
.descCRC
= cpu_to_le16(
1956 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
1957 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
1959 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
1961 * We set buffer uptodate unconditionally here to avoid spurious
1962 * warnings from mark_buffer_dirty() when previous EIO has marked
1963 * the buffer as !uptodate
1965 set_buffer_uptodate(bh
);
1966 mark_buffer_dirty(bh
);
1967 sbi
->s_lvid_dirty
= 0;
1968 mutex_unlock(&sbi
->s_alloc_mutex
);
1969 /* Make closing of filesystem visible on the media immediately */
1970 sync_dirty_buffer(bh
);
1973 u64
lvid_get_unique_id(struct super_block
*sb
)
1975 struct buffer_head
*bh
;
1976 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1977 struct logicalVolIntegrityDesc
*lvid
;
1978 struct logicalVolHeaderDesc
*lvhd
;
1982 bh
= sbi
->s_lvid_bh
;
1986 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1987 lvhd
= (struct logicalVolHeaderDesc
*)lvid
->logicalVolContentsUse
;
1989 mutex_lock(&sbi
->s_alloc_mutex
);
1990 ret
= uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
1991 if (!(++uniqueID
& 0xFFFFFFFF))
1993 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
1994 mutex_unlock(&sbi
->s_alloc_mutex
);
1995 mark_buffer_dirty(bh
);
2000 static int udf_fill_super(struct super_block
*sb
, void *options
, int silent
)
2003 struct inode
*inode
= NULL
;
2004 struct udf_options uopt
;
2005 struct kernel_lb_addr rootdir
, fileset
;
2006 struct udf_sb_info
*sbi
;
2008 uopt
.flags
= (1 << UDF_FLAG_USE_AD_IN_ICB
) | (1 << UDF_FLAG_STRICT
);
2009 uopt
.uid
= INVALID_UID
;
2010 uopt
.gid
= INVALID_GID
;
2012 uopt
.fmode
= UDF_INVALID_MODE
;
2013 uopt
.dmode
= UDF_INVALID_MODE
;
2015 sbi
= kzalloc(sizeof(struct udf_sb_info
), GFP_KERNEL
);
2019 sb
->s_fs_info
= sbi
;
2021 mutex_init(&sbi
->s_alloc_mutex
);
2023 if (!udf_parse_options((char *)options
, &uopt
, false))
2026 if (uopt
.flags
& (1 << UDF_FLAG_UTF8
) &&
2027 uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) {
2028 udf_err(sb
, "utf8 cannot be combined with iocharset\n");
2031 #ifdef CONFIG_UDF_NLS
2032 if ((uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) && !uopt
.nls_map
) {
2033 uopt
.nls_map
= load_nls_default();
2035 uopt
.flags
&= ~(1 << UDF_FLAG_NLS_MAP
);
2037 udf_debug("Using default NLS map\n");
2040 if (!(uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)))
2041 uopt
.flags
|= (1 << UDF_FLAG_UTF8
);
2043 fileset
.logicalBlockNum
= 0xFFFFFFFF;
2044 fileset
.partitionReferenceNum
= 0xFFFF;
2046 sbi
->s_flags
= uopt
.flags
;
2047 sbi
->s_uid
= uopt
.uid
;
2048 sbi
->s_gid
= uopt
.gid
;
2049 sbi
->s_umask
= uopt
.umask
;
2050 sbi
->s_fmode
= uopt
.fmode
;
2051 sbi
->s_dmode
= uopt
.dmode
;
2052 sbi
->s_nls_map
= uopt
.nls_map
;
2053 rwlock_init(&sbi
->s_cred_lock
);
2055 if (uopt
.session
== 0xFFFFFFFF)
2056 sbi
->s_session
= udf_get_last_session(sb
);
2058 sbi
->s_session
= uopt
.session
;
2060 udf_debug("Multi-session=%d\n", sbi
->s_session
);
2062 /* Fill in the rest of the superblock */
2063 sb
->s_op
= &udf_sb_ops
;
2064 sb
->s_export_op
= &udf_export_ops
;
2066 sb
->s_magic
= UDF_SUPER_MAGIC
;
2067 sb
->s_time_gran
= 1000;
2069 if (uopt
.flags
& (1 << UDF_FLAG_BLOCKSIZE_SET
)) {
2070 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2072 uopt
.blocksize
= bdev_logical_block_size(sb
->s_bdev
);
2073 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2074 if (ret
== -EAGAIN
&& uopt
.blocksize
!= UDF_DEFAULT_BLOCKSIZE
) {
2076 pr_notice("Rescanning with blocksize %d\n",
2077 UDF_DEFAULT_BLOCKSIZE
);
2078 brelse(sbi
->s_lvid_bh
);
2079 sbi
->s_lvid_bh
= NULL
;
2080 uopt
.blocksize
= UDF_DEFAULT_BLOCKSIZE
;
2081 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2085 if (ret
== -EAGAIN
) {
2086 udf_warn(sb
, "No partition found (1)\n");
2092 udf_debug("Lastblock=%d\n", sbi
->s_last_block
);
2094 if (sbi
->s_lvid_bh
) {
2095 struct logicalVolIntegrityDescImpUse
*lvidiu
=
2097 uint16_t minUDFReadRev
= le16_to_cpu(lvidiu
->minUDFReadRev
);
2098 uint16_t minUDFWriteRev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
2099 /* uint16_t maxUDFWriteRev =
2100 le16_to_cpu(lvidiu->maxUDFWriteRev); */
2102 if (minUDFReadRev
> UDF_MAX_READ_VERSION
) {
2103 udf_err(sb
, "minUDFReadRev=%x (max is %x)\n",
2104 le16_to_cpu(lvidiu
->minUDFReadRev
),
2105 UDF_MAX_READ_VERSION
);
2108 } else if (minUDFWriteRev
> UDF_MAX_WRITE_VERSION
&&
2109 !(sb
->s_flags
& MS_RDONLY
)) {
2114 sbi
->s_udfrev
= minUDFWriteRev
;
2116 if (minUDFReadRev
>= UDF_VERS_USE_EXTENDED_FE
)
2117 UDF_SET_FLAG(sb
, UDF_FLAG_USE_EXTENDED_FE
);
2118 if (minUDFReadRev
>= UDF_VERS_USE_STREAMS
)
2119 UDF_SET_FLAG(sb
, UDF_FLAG_USE_STREAMS
);
2122 if (!sbi
->s_partitions
) {
2123 udf_warn(sb
, "No partition found (2)\n");
2128 if (sbi
->s_partmaps
[sbi
->s_partition
].s_partition_flags
&
2129 UDF_PART_FLAG_READ_ONLY
&&
2130 !(sb
->s_flags
& MS_RDONLY
)) {
2135 if (udf_find_fileset(sb
, &fileset
, &rootdir
)) {
2136 udf_warn(sb
, "No fileset found\n");
2142 struct timestamp ts
;
2143 udf_time_to_disk_stamp(&ts
, sbi
->s_record_time
);
2144 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2145 sbi
->s_volume_ident
,
2146 le16_to_cpu(ts
.year
), ts
.month
, ts
.day
,
2147 ts
.hour
, ts
.minute
, le16_to_cpu(ts
.typeAndTimezone
));
2149 if (!(sb
->s_flags
& MS_RDONLY
))
2152 /* Assign the root inode */
2153 /* assign inodes by physical block number */
2154 /* perhaps it's not extensible enough, but for now ... */
2155 inode
= udf_iget(sb
, &rootdir
);
2157 udf_err(sb
, "Error in udf_iget, block=%d, partition=%d\n",
2158 rootdir
.logicalBlockNum
, rootdir
.partitionReferenceNum
);
2163 /* Allocate a dentry for the root inode */
2164 sb
->s_root
= d_make_root(inode
);
2166 udf_err(sb
, "Couldn't allocate root dentry\n");
2170 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
2171 sb
->s_max_links
= UDF_MAX_LINKS
;
2175 if (sbi
->s_vat_inode
)
2176 iput(sbi
->s_vat_inode
);
2177 #ifdef CONFIG_UDF_NLS
2178 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2179 unload_nls(sbi
->s_nls_map
);
2181 if (!(sb
->s_flags
& MS_RDONLY
))
2183 brelse(sbi
->s_lvid_bh
);
2184 udf_sb_free_partitions(sb
);
2186 sb
->s_fs_info
= NULL
;
2191 void _udf_err(struct super_block
*sb
, const char *function
,
2192 const char *fmt
, ...)
2194 struct va_format vaf
;
2197 va_start(args
, fmt
);
2202 pr_err("error (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2207 void _udf_warn(struct super_block
*sb
, const char *function
,
2208 const char *fmt
, ...)
2210 struct va_format vaf
;
2213 va_start(args
, fmt
);
2218 pr_warn("warning (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2223 static void udf_put_super(struct super_block
*sb
)
2225 struct udf_sb_info
*sbi
;
2229 if (sbi
->s_vat_inode
)
2230 iput(sbi
->s_vat_inode
);
2231 #ifdef CONFIG_UDF_NLS
2232 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2233 unload_nls(sbi
->s_nls_map
);
2235 if (!(sb
->s_flags
& MS_RDONLY
))
2237 brelse(sbi
->s_lvid_bh
);
2238 udf_sb_free_partitions(sb
);
2239 kfree(sb
->s_fs_info
);
2240 sb
->s_fs_info
= NULL
;
2243 static int udf_sync_fs(struct super_block
*sb
, int wait
)
2245 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2247 mutex_lock(&sbi
->s_alloc_mutex
);
2248 if (sbi
->s_lvid_dirty
) {
2250 * Blockdevice will be synced later so we don't have to submit
2253 mark_buffer_dirty(sbi
->s_lvid_bh
);
2254 sbi
->s_lvid_dirty
= 0;
2256 mutex_unlock(&sbi
->s_alloc_mutex
);
2261 static int udf_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2263 struct super_block
*sb
= dentry
->d_sb
;
2264 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2265 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2266 u64 id
= huge_encode_dev(sb
->s_bdev
->bd_dev
);
2268 if (sbi
->s_lvid_bh
!= NULL
)
2269 lvidiu
= udf_sb_lvidiu(sbi
);
2273 buf
->f_type
= UDF_SUPER_MAGIC
;
2274 buf
->f_bsize
= sb
->s_blocksize
;
2275 buf
->f_blocks
= sbi
->s_partmaps
[sbi
->s_partition
].s_partition_len
;
2276 buf
->f_bfree
= udf_count_free(sb
);
2277 buf
->f_bavail
= buf
->f_bfree
;
2278 buf
->f_files
= (lvidiu
!= NULL
? (le32_to_cpu(lvidiu
->numFiles
) +
2279 le32_to_cpu(lvidiu
->numDirs
)) : 0)
2281 buf
->f_ffree
= buf
->f_bfree
;
2282 buf
->f_namelen
= UDF_NAME_LEN
- 2;
2283 buf
->f_fsid
.val
[0] = (u32
)id
;
2284 buf
->f_fsid
.val
[1] = (u32
)(id
>> 32);
2289 static unsigned int udf_count_free_bitmap(struct super_block
*sb
,
2290 struct udf_bitmap
*bitmap
)
2292 struct buffer_head
*bh
= NULL
;
2293 unsigned int accum
= 0;
2295 int block
= 0, newblock
;
2296 struct kernel_lb_addr loc
;
2300 struct spaceBitmapDesc
*bm
;
2302 loc
.logicalBlockNum
= bitmap
->s_extPosition
;
2303 loc
.partitionReferenceNum
= UDF_SB(sb
)->s_partition
;
2304 bh
= udf_read_ptagged(sb
, &loc
, 0, &ident
);
2307 udf_err(sb
, "udf_count_free failed\n");
2309 } else if (ident
!= TAG_IDENT_SBD
) {
2311 udf_err(sb
, "udf_count_free failed\n");
2315 bm
= (struct spaceBitmapDesc
*)bh
->b_data
;
2316 bytes
= le32_to_cpu(bm
->numOfBytes
);
2317 index
= sizeof(struct spaceBitmapDesc
); /* offset in first block only */
2318 ptr
= (uint8_t *)bh
->b_data
;
2321 u32 cur_bytes
= min_t(u32
, bytes
, sb
->s_blocksize
- index
);
2322 accum
+= bitmap_weight((const unsigned long *)(ptr
+ index
),
2327 newblock
= udf_get_lb_pblock(sb
, &loc
, ++block
);
2328 bh
= udf_tread(sb
, newblock
);
2330 udf_debug("read failed\n");
2334 ptr
= (uint8_t *)bh
->b_data
;
2342 static unsigned int udf_count_free_table(struct super_block
*sb
,
2343 struct inode
*table
)
2345 unsigned int accum
= 0;
2347 struct kernel_lb_addr eloc
;
2349 struct extent_position epos
;
2351 mutex_lock(&UDF_SB(sb
)->s_alloc_mutex
);
2352 epos
.block
= UDF_I(table
)->i_location
;
2353 epos
.offset
= sizeof(struct unallocSpaceEntry
);
2356 while ((etype
= udf_next_aext(table
, &epos
, &eloc
, &elen
, 1)) != -1)
2357 accum
+= (elen
>> table
->i_sb
->s_blocksize_bits
);
2360 mutex_unlock(&UDF_SB(sb
)->s_alloc_mutex
);
2365 static unsigned int udf_count_free(struct super_block
*sb
)
2367 unsigned int accum
= 0;
2368 struct udf_sb_info
*sbi
;
2369 struct udf_part_map
*map
;
2372 if (sbi
->s_lvid_bh
) {
2373 struct logicalVolIntegrityDesc
*lvid
=
2374 (struct logicalVolIntegrityDesc
*)
2375 sbi
->s_lvid_bh
->b_data
;
2376 if (le32_to_cpu(lvid
->numOfPartitions
) > sbi
->s_partition
) {
2377 accum
= le32_to_cpu(
2378 lvid
->freeSpaceTable
[sbi
->s_partition
]);
2379 if (accum
== 0xFFFFFFFF)
2387 map
= &sbi
->s_partmaps
[sbi
->s_partition
];
2388 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
) {
2389 accum
+= udf_count_free_bitmap(sb
,
2390 map
->s_uspace
.s_bitmap
);
2392 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
) {
2393 accum
+= udf_count_free_bitmap(sb
,
2394 map
->s_fspace
.s_bitmap
);
2399 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
) {
2400 accum
+= udf_count_free_table(sb
,
2401 map
->s_uspace
.s_table
);
2403 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
) {
2404 accum
+= udf_count_free_table(sb
,
2405 map
->s_fspace
.s_table
);