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/vfs.h>
52 #include <linux/vmalloc.h>
53 #include <linux/errno.h>
54 #include <linux/mount.h>
55 #include <linux/seq_file.h>
56 #include <linux/bitmap.h>
57 #include <linux/crc-itu-t.h>
58 #include <linux/log2.h>
59 #include <asm/byteorder.h>
64 #include <linux/init.h>
65 #include <linux/uaccess.h>
67 #define VDS_POS_PRIMARY_VOL_DESC 0
68 #define VDS_POS_UNALLOC_SPACE_DESC 1
69 #define VDS_POS_LOGICAL_VOL_DESC 2
70 #define VDS_POS_PARTITION_DESC 3
71 #define VDS_POS_IMP_USE_VOL_DESC 4
72 #define VDS_POS_VOL_DESC_PTR 5
73 #define VDS_POS_TERMINATING_DESC 6
74 #define VDS_POS_LENGTH 7
76 #define VSD_FIRST_SECTOR_OFFSET 32768
77 #define VSD_MAX_SECTOR_OFFSET 0x800000
80 * Maximum number of Terminating Descriptor / Logical Volume Integrity
81 * Descriptor redirections. The chosen numbers are arbitrary - just that we
82 * hopefully don't limit any real use of rewritten inode on write-once media
83 * but avoid looping for too long on corrupted media.
85 #define UDF_MAX_TD_NESTING 64
86 #define UDF_MAX_LVID_NESTING 1000
88 enum { UDF_MAX_LINKS
= 0xffff };
90 /* These are the "meat" - everything else is stuffing */
91 static int udf_fill_super(struct super_block
*, void *, int);
92 static void udf_put_super(struct super_block
*);
93 static int udf_sync_fs(struct super_block
*, int);
94 static int udf_remount_fs(struct super_block
*, int *, char *);
95 static void udf_load_logicalvolint(struct super_block
*, struct kernel_extent_ad
);
96 static int udf_find_fileset(struct super_block
*, struct kernel_lb_addr
*,
97 struct kernel_lb_addr
*);
98 static void udf_load_fileset(struct super_block
*, struct buffer_head
*,
99 struct kernel_lb_addr
*);
100 static void udf_open_lvid(struct super_block
*);
101 static void udf_close_lvid(struct super_block
*);
102 static unsigned int udf_count_free(struct super_block
*);
103 static int udf_statfs(struct dentry
*, struct kstatfs
*);
104 static int udf_show_options(struct seq_file
*, struct dentry
*);
106 struct logicalVolIntegrityDescImpUse
*udf_sb_lvidiu(struct super_block
*sb
)
108 struct logicalVolIntegrityDesc
*lvid
;
109 unsigned int partnum
;
112 if (!UDF_SB(sb
)->s_lvid_bh
)
114 lvid
= (struct logicalVolIntegrityDesc
*)UDF_SB(sb
)->s_lvid_bh
->b_data
;
115 partnum
= le32_to_cpu(lvid
->numOfPartitions
);
116 if ((sb
->s_blocksize
- sizeof(struct logicalVolIntegrityDescImpUse
) -
117 offsetof(struct logicalVolIntegrityDesc
, impUse
)) /
118 (2 * sizeof(uint32_t)) < partnum
) {
119 udf_err(sb
, "Logical volume integrity descriptor corrupted "
120 "(numOfPartitions = %u)!\n", partnum
);
123 /* The offset is to skip freeSpaceTable and sizeTable arrays */
124 offset
= partnum
* 2 * sizeof(uint32_t);
125 return (struct logicalVolIntegrityDescImpUse
*)&(lvid
->impUse
[offset
]);
128 /* UDF filesystem type */
129 static struct dentry
*udf_mount(struct file_system_type
*fs_type
,
130 int flags
, const char *dev_name
, void *data
)
132 return mount_bdev(fs_type
, flags
, dev_name
, data
, udf_fill_super
);
135 static struct file_system_type udf_fstype
= {
136 .owner
= THIS_MODULE
,
139 .kill_sb
= kill_block_super
,
140 .fs_flags
= FS_REQUIRES_DEV
,
142 MODULE_ALIAS_FS("udf");
144 static struct kmem_cache
*udf_inode_cachep
;
146 static struct inode
*udf_alloc_inode(struct super_block
*sb
)
148 struct udf_inode_info
*ei
;
149 ei
= kmem_cache_alloc(udf_inode_cachep
, GFP_KERNEL
);
154 ei
->i_lenExtents
= 0;
155 ei
->i_next_alloc_block
= 0;
156 ei
->i_next_alloc_goal
= 0;
158 init_rwsem(&ei
->i_data_sem
);
159 ei
->cached_extent
.lstart
= -1;
160 spin_lock_init(&ei
->i_extent_cache_lock
);
162 return &ei
->vfs_inode
;
165 static void udf_i_callback(struct rcu_head
*head
)
167 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
168 kmem_cache_free(udf_inode_cachep
, UDF_I(inode
));
171 static void udf_destroy_inode(struct inode
*inode
)
173 call_rcu(&inode
->i_rcu
, udf_i_callback
);
176 static void init_once(void *foo
)
178 struct udf_inode_info
*ei
= (struct udf_inode_info
*)foo
;
180 ei
->i_ext
.i_data
= NULL
;
181 inode_init_once(&ei
->vfs_inode
);
184 static int __init
init_inodecache(void)
186 udf_inode_cachep
= kmem_cache_create("udf_inode_cache",
187 sizeof(struct udf_inode_info
),
188 0, (SLAB_RECLAIM_ACCOUNT
|
192 if (!udf_inode_cachep
)
197 static void destroy_inodecache(void)
200 * Make sure all delayed rcu free inodes are flushed before we
204 kmem_cache_destroy(udf_inode_cachep
);
207 /* Superblock operations */
208 static const struct super_operations udf_sb_ops
= {
209 .alloc_inode
= udf_alloc_inode
,
210 .destroy_inode
= udf_destroy_inode
,
211 .write_inode
= udf_write_inode
,
212 .evict_inode
= udf_evict_inode
,
213 .put_super
= udf_put_super
,
214 .sync_fs
= udf_sync_fs
,
215 .statfs
= udf_statfs
,
216 .remount_fs
= udf_remount_fs
,
217 .show_options
= udf_show_options
,
222 unsigned int blocksize
;
223 unsigned int session
;
224 unsigned int lastblock
;
227 unsigned short partition
;
228 unsigned int fileset
;
229 unsigned int rootdir
;
236 struct nls_table
*nls_map
;
239 static int __init
init_udf_fs(void)
243 err
= init_inodecache();
246 err
= register_filesystem(&udf_fstype
);
253 destroy_inodecache();
259 static void __exit
exit_udf_fs(void)
261 unregister_filesystem(&udf_fstype
);
262 destroy_inodecache();
265 static int udf_sb_alloc_partition_maps(struct super_block
*sb
, u32 count
)
267 struct udf_sb_info
*sbi
= UDF_SB(sb
);
269 sbi
->s_partmaps
= kcalloc(count
, sizeof(struct udf_part_map
),
271 if (!sbi
->s_partmaps
) {
272 udf_err(sb
, "Unable to allocate space for %d partition maps\n",
274 sbi
->s_partitions
= 0;
278 sbi
->s_partitions
= count
;
282 static void udf_sb_free_bitmap(struct udf_bitmap
*bitmap
)
285 int nr_groups
= bitmap
->s_nr_groups
;
287 for (i
= 0; i
< nr_groups
; i
++)
288 if (bitmap
->s_block_bitmap
[i
])
289 brelse(bitmap
->s_block_bitmap
[i
]);
294 static void udf_free_partition(struct udf_part_map
*map
)
297 struct udf_meta_data
*mdata
;
299 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
)
300 iput(map
->s_uspace
.s_table
);
301 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
)
302 iput(map
->s_fspace
.s_table
);
303 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
)
304 udf_sb_free_bitmap(map
->s_uspace
.s_bitmap
);
305 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
)
306 udf_sb_free_bitmap(map
->s_fspace
.s_bitmap
);
307 if (map
->s_partition_type
== UDF_SPARABLE_MAP15
)
308 for (i
= 0; i
< 4; i
++)
309 brelse(map
->s_type_specific
.s_sparing
.s_spar_map
[i
]);
310 else if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
311 mdata
= &map
->s_type_specific
.s_metadata
;
312 iput(mdata
->s_metadata_fe
);
313 mdata
->s_metadata_fe
= NULL
;
315 iput(mdata
->s_mirror_fe
);
316 mdata
->s_mirror_fe
= NULL
;
318 iput(mdata
->s_bitmap_fe
);
319 mdata
->s_bitmap_fe
= NULL
;
323 static void udf_sb_free_partitions(struct super_block
*sb
)
325 struct udf_sb_info
*sbi
= UDF_SB(sb
);
327 if (sbi
->s_partmaps
== NULL
)
329 for (i
= 0; i
< sbi
->s_partitions
; i
++)
330 udf_free_partition(&sbi
->s_partmaps
[i
]);
331 kfree(sbi
->s_partmaps
);
332 sbi
->s_partmaps
= NULL
;
335 static int udf_show_options(struct seq_file
*seq
, struct dentry
*root
)
337 struct super_block
*sb
= root
->d_sb
;
338 struct udf_sb_info
*sbi
= UDF_SB(sb
);
340 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_STRICT
))
341 seq_puts(seq
, ",nostrict");
342 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_BLOCKSIZE_SET
))
343 seq_printf(seq
, ",bs=%lu", sb
->s_blocksize
);
344 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNHIDE
))
345 seq_puts(seq
, ",unhide");
346 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNDELETE
))
347 seq_puts(seq
, ",undelete");
348 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_AD_IN_ICB
))
349 seq_puts(seq
, ",noadinicb");
350 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_SHORT_AD
))
351 seq_puts(seq
, ",shortad");
352 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_FORGET
))
353 seq_puts(seq
, ",uid=forget");
354 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_IGNORE
))
355 seq_puts(seq
, ",uid=ignore");
356 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_FORGET
))
357 seq_puts(seq
, ",gid=forget");
358 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_IGNORE
))
359 seq_puts(seq
, ",gid=ignore");
360 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_SET
))
361 seq_printf(seq
, ",uid=%u", from_kuid(&init_user_ns
, sbi
->s_uid
));
362 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_SET
))
363 seq_printf(seq
, ",gid=%u", from_kgid(&init_user_ns
, sbi
->s_gid
));
364 if (sbi
->s_umask
!= 0)
365 seq_printf(seq
, ",umask=%ho", sbi
->s_umask
);
366 if (sbi
->s_fmode
!= UDF_INVALID_MODE
)
367 seq_printf(seq
, ",mode=%ho", sbi
->s_fmode
);
368 if (sbi
->s_dmode
!= UDF_INVALID_MODE
)
369 seq_printf(seq
, ",dmode=%ho", sbi
->s_dmode
);
370 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_SESSION_SET
))
371 seq_printf(seq
, ",session=%u", sbi
->s_session
);
372 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_LASTBLOCK_SET
))
373 seq_printf(seq
, ",lastblock=%u", sbi
->s_last_block
);
374 if (sbi
->s_anchor
!= 0)
375 seq_printf(seq
, ",anchor=%u", sbi
->s_anchor
);
377 * volume, partition, fileset and rootdir seem to be ignored
380 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UTF8
))
381 seq_puts(seq
, ",utf8");
382 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
) && sbi
->s_nls_map
)
383 seq_printf(seq
, ",iocharset=%s", sbi
->s_nls_map
->charset
);
392 * Parse mount options.
395 * The following mount options are supported:
397 * gid= Set the default group.
398 * umask= Set the default umask.
399 * mode= Set the default file permissions.
400 * dmode= Set the default directory permissions.
401 * uid= Set the default user.
402 * bs= Set the block size.
403 * unhide Show otherwise hidden files.
404 * undelete Show deleted files in lists.
405 * adinicb Embed data in the inode (default)
406 * noadinicb Don't embed data in the inode
407 * shortad Use short ad's
408 * longad Use long ad's (default)
409 * nostrict Unset strict conformance
410 * iocharset= Set the NLS character set
412 * The remaining are for debugging and disaster recovery:
414 * novrs Skip volume sequence recognition
416 * The following expect a offset from 0.
418 * session= Set the CDROM session (default= last session)
419 * anchor= Override standard anchor location. (default= 256)
420 * volume= Override the VolumeDesc location. (unused)
421 * partition= Override the PartitionDesc location. (unused)
422 * lastblock= Set the last block of the filesystem/
424 * The following expect a offset from the partition root.
426 * fileset= Override the fileset block location. (unused)
427 * rootdir= Override the root directory location. (unused)
428 * WARNING: overriding the rootdir to a non-directory may
429 * yield highly unpredictable results.
432 * options Pointer to mount options string.
433 * uopts Pointer to mount options variable.
436 * <return> 1 Mount options parsed okay.
437 * <return> 0 Error parsing mount options.
440 * July 1, 1997 - Andrew E. Mileski
441 * Written, tested, and released.
445 Opt_novrs
, Opt_nostrict
, Opt_bs
, Opt_unhide
, Opt_undelete
,
446 Opt_noadinicb
, Opt_adinicb
, Opt_shortad
, Opt_longad
,
447 Opt_gid
, Opt_uid
, Opt_umask
, Opt_session
, Opt_lastblock
,
448 Opt_anchor
, Opt_volume
, Opt_partition
, Opt_fileset
,
449 Opt_rootdir
, Opt_utf8
, Opt_iocharset
,
450 Opt_err
, Opt_uforget
, Opt_uignore
, Opt_gforget
, Opt_gignore
,
454 static const match_table_t tokens
= {
455 {Opt_novrs
, "novrs"},
456 {Opt_nostrict
, "nostrict"},
458 {Opt_unhide
, "unhide"},
459 {Opt_undelete
, "undelete"},
460 {Opt_noadinicb
, "noadinicb"},
461 {Opt_adinicb
, "adinicb"},
462 {Opt_shortad
, "shortad"},
463 {Opt_longad
, "longad"},
464 {Opt_uforget
, "uid=forget"},
465 {Opt_uignore
, "uid=ignore"},
466 {Opt_gforget
, "gid=forget"},
467 {Opt_gignore
, "gid=ignore"},
470 {Opt_umask
, "umask=%o"},
471 {Opt_session
, "session=%u"},
472 {Opt_lastblock
, "lastblock=%u"},
473 {Opt_anchor
, "anchor=%u"},
474 {Opt_volume
, "volume=%u"},
475 {Opt_partition
, "partition=%u"},
476 {Opt_fileset
, "fileset=%u"},
477 {Opt_rootdir
, "rootdir=%u"},
479 {Opt_iocharset
, "iocharset=%s"},
480 {Opt_fmode
, "mode=%o"},
481 {Opt_dmode
, "dmode=%o"},
485 static int udf_parse_options(char *options
, struct udf_options
*uopt
,
492 uopt
->partition
= 0xFFFF;
493 uopt
->session
= 0xFFFFFFFF;
496 uopt
->volume
= 0xFFFFFFFF;
497 uopt
->rootdir
= 0xFFFFFFFF;
498 uopt
->fileset
= 0xFFFFFFFF;
499 uopt
->nls_map
= NULL
;
504 while ((p
= strsep(&options
, ",")) != NULL
) {
505 substring_t args
[MAX_OPT_ARGS
];
511 token
= match_token(p
, tokens
, args
);
517 if (match_int(&args
[0], &option
))
520 if (n
!= 512 && n
!= 1024 && n
!= 2048 && n
!= 4096)
523 uopt
->flags
|= (1 << UDF_FLAG_BLOCKSIZE_SET
);
526 uopt
->flags
|= (1 << UDF_FLAG_UNHIDE
);
529 uopt
->flags
|= (1 << UDF_FLAG_UNDELETE
);
532 uopt
->flags
&= ~(1 << UDF_FLAG_USE_AD_IN_ICB
);
535 uopt
->flags
|= (1 << UDF_FLAG_USE_AD_IN_ICB
);
538 uopt
->flags
|= (1 << UDF_FLAG_USE_SHORT_AD
);
541 uopt
->flags
&= ~(1 << UDF_FLAG_USE_SHORT_AD
);
544 if (match_int(args
, &option
))
546 uopt
->gid
= make_kgid(current_user_ns(), option
);
547 if (!gid_valid(uopt
->gid
))
549 uopt
->flags
|= (1 << UDF_FLAG_GID_SET
);
552 if (match_int(args
, &option
))
554 uopt
->uid
= make_kuid(current_user_ns(), option
);
555 if (!uid_valid(uopt
->uid
))
557 uopt
->flags
|= (1 << UDF_FLAG_UID_SET
);
560 if (match_octal(args
, &option
))
562 uopt
->umask
= option
;
565 uopt
->flags
&= ~(1 << UDF_FLAG_STRICT
);
568 if (match_int(args
, &option
))
570 uopt
->session
= option
;
572 uopt
->flags
|= (1 << UDF_FLAG_SESSION_SET
);
575 if (match_int(args
, &option
))
577 uopt
->lastblock
= option
;
579 uopt
->flags
|= (1 << UDF_FLAG_LASTBLOCK_SET
);
582 if (match_int(args
, &option
))
584 uopt
->anchor
= option
;
587 if (match_int(args
, &option
))
589 uopt
->volume
= option
;
592 if (match_int(args
, &option
))
594 uopt
->partition
= option
;
597 if (match_int(args
, &option
))
599 uopt
->fileset
= option
;
602 if (match_int(args
, &option
))
604 uopt
->rootdir
= option
;
607 uopt
->flags
|= (1 << UDF_FLAG_UTF8
);
609 #ifdef CONFIG_UDF_NLS
611 uopt
->nls_map
= load_nls(args
[0].from
);
612 uopt
->flags
|= (1 << UDF_FLAG_NLS_MAP
);
616 uopt
->flags
|= (1 << UDF_FLAG_UID_IGNORE
);
619 uopt
->flags
|= (1 << UDF_FLAG_UID_FORGET
);
622 uopt
->flags
|= (1 << UDF_FLAG_GID_IGNORE
);
625 uopt
->flags
|= (1 << UDF_FLAG_GID_FORGET
);
628 if (match_octal(args
, &option
))
630 uopt
->fmode
= option
& 0777;
633 if (match_octal(args
, &option
))
635 uopt
->dmode
= option
& 0777;
638 pr_err("bad mount option \"%s\" or missing value\n", p
);
645 static int udf_remount_fs(struct super_block
*sb
, int *flags
, char *options
)
647 struct udf_options uopt
;
648 struct udf_sb_info
*sbi
= UDF_SB(sb
);
650 struct logicalVolIntegrityDescImpUse
*lvidiu
= udf_sb_lvidiu(sb
);
654 int write_rev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
655 if (write_rev
> UDF_MAX_WRITE_VERSION
&& !(*flags
& MS_RDONLY
))
659 uopt
.flags
= sbi
->s_flags
;
660 uopt
.uid
= sbi
->s_uid
;
661 uopt
.gid
= sbi
->s_gid
;
662 uopt
.umask
= sbi
->s_umask
;
663 uopt
.fmode
= sbi
->s_fmode
;
664 uopt
.dmode
= sbi
->s_dmode
;
666 if (!udf_parse_options(options
, &uopt
, true))
669 write_lock(&sbi
->s_cred_lock
);
670 sbi
->s_flags
= uopt
.flags
;
671 sbi
->s_uid
= uopt
.uid
;
672 sbi
->s_gid
= uopt
.gid
;
673 sbi
->s_umask
= uopt
.umask
;
674 sbi
->s_fmode
= uopt
.fmode
;
675 sbi
->s_dmode
= uopt
.dmode
;
676 write_unlock(&sbi
->s_cred_lock
);
678 if ((*flags
& MS_RDONLY
) == (sb
->s_flags
& MS_RDONLY
))
681 if (*flags
& MS_RDONLY
)
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) */
692 static loff_t
udf_check_vsd(struct super_block
*sb
)
694 struct volStructDesc
*vsd
= NULL
;
695 loff_t sector
= VSD_FIRST_SECTOR_OFFSET
;
697 struct buffer_head
*bh
= NULL
;
700 struct udf_sb_info
*sbi
;
703 if (sb
->s_blocksize
< sizeof(struct volStructDesc
))
704 sectorsize
= sizeof(struct volStructDesc
);
706 sectorsize
= sb
->s_blocksize
;
708 sector
+= (sbi
->s_session
<< sb
->s_blocksize_bits
);
710 udf_debug("Starting at sector %u (%ld byte sectors)\n",
711 (unsigned int)(sector
>> sb
->s_blocksize_bits
),
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
723 for (; !nsr02
&& !nsr03
&& sector
< VSD_MAX_SECTOR_OFFSET
;
724 sector
+= sectorsize
) {
726 bh
= udf_tread(sb
, sector
>> sb
->s_blocksize_bits
);
730 /* Look for ISO descriptors */
731 vsd
= (struct volStructDesc
*)(bh
->b_data
+
732 (sector
& (sb
->s_blocksize
- 1)));
734 if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CD001
,
736 switch (vsd
->structType
) {
738 udf_debug("ISO9660 Boot Record found\n");
741 udf_debug("ISO9660 Primary Volume Descriptor found\n");
744 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
747 udf_debug("ISO9660 Volume Partition Descriptor found\n");
750 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
753 udf_debug("ISO9660 VRS (%u) found\n",
757 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BEA01
,
760 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_TEA01
,
764 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR02
,
767 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR03
,
770 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BOOT2
,
773 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CDW02
,
777 /* invalid id : end of volume recognition area */
788 else if (!bh
&& sector
- (sbi
->s_session
<< sb
->s_blocksize_bits
) ==
789 VSD_FIRST_SECTOR_OFFSET
)
795 static int udf_find_fileset(struct super_block
*sb
,
796 struct kernel_lb_addr
*fileset
,
797 struct kernel_lb_addr
*root
)
799 struct buffer_head
*bh
= NULL
;
802 struct udf_sb_info
*sbi
;
804 if (fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
805 fileset
->partitionReferenceNum
!= 0xFFFF) {
806 bh
= udf_read_ptagged(sb
, fileset
, 0, &ident
);
810 } else if (ident
!= TAG_IDENT_FSD
) {
819 /* Search backwards through the partitions */
820 struct kernel_lb_addr newfileset
;
822 /* --> cvg: FIXME - is it reasonable? */
825 for (newfileset
.partitionReferenceNum
= sbi
->s_partitions
- 1;
826 (newfileset
.partitionReferenceNum
!= 0xFFFF &&
827 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
828 fileset
->partitionReferenceNum
== 0xFFFF);
829 newfileset
.partitionReferenceNum
--) {
830 lastblock
= sbi
->s_partmaps
831 [newfileset
.partitionReferenceNum
]
833 newfileset
.logicalBlockNum
= 0;
836 bh
= udf_read_ptagged(sb
, &newfileset
, 0,
839 newfileset
.logicalBlockNum
++;
846 struct spaceBitmapDesc
*sp
;
847 sp
= (struct spaceBitmapDesc
*)
849 newfileset
.logicalBlockNum
+= 1 +
850 ((le32_to_cpu(sp
->numOfBytes
) +
851 sizeof(struct spaceBitmapDesc
)
852 - 1) >> sb
->s_blocksize_bits
);
857 *fileset
= newfileset
;
860 newfileset
.logicalBlockNum
++;
865 } while (newfileset
.logicalBlockNum
< lastblock
&&
866 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
867 fileset
->partitionReferenceNum
== 0xFFFF);
871 if ((fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
872 fileset
->partitionReferenceNum
!= 0xFFFF) && bh
) {
873 udf_debug("Fileset at block=%d, partition=%d\n",
874 fileset
->logicalBlockNum
,
875 fileset
->partitionReferenceNum
);
877 sbi
->s_partition
= fileset
->partitionReferenceNum
;
878 udf_load_fileset(sb
, bh
, root
);
886 * Load primary Volume Descriptor Sequence
888 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
891 static int udf_load_pvoldesc(struct super_block
*sb
, sector_t block
)
893 struct primaryVolDesc
*pvoldesc
;
895 struct buffer_head
*bh
;
899 outstr
= kmalloc(128, GFP_NOFS
);
903 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
909 if (ident
!= TAG_IDENT_PVD
) {
914 pvoldesc
= (struct primaryVolDesc
*)bh
->b_data
;
916 if (udf_disk_stamp_to_time(&UDF_SB(sb
)->s_record_time
,
917 pvoldesc
->recordingDateAndTime
)) {
919 struct timestamp
*ts
= &pvoldesc
->recordingDateAndTime
;
920 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
921 le16_to_cpu(ts
->year
), ts
->month
, ts
->day
, ts
->hour
,
922 ts
->minute
, le16_to_cpu(ts
->typeAndTimezone
));
926 ret
= udf_dstrCS0toUTF8(outstr
, 31, pvoldesc
->volIdent
, 32);
930 strncpy(UDF_SB(sb
)->s_volume_ident
, outstr
, ret
);
931 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb
)->s_volume_ident
);
933 ret
= udf_dstrCS0toUTF8(outstr
, 127, pvoldesc
->volSetIdent
, 128);
938 udf_debug("volSetIdent[] = '%s'\n", outstr
);
948 struct inode
*udf_find_metadata_inode_efe(struct super_block
*sb
,
949 u32 meta_file_loc
, u32 partition_ref
)
951 struct kernel_lb_addr addr
;
952 struct inode
*metadata_fe
;
954 addr
.logicalBlockNum
= meta_file_loc
;
955 addr
.partitionReferenceNum
= partition_ref
;
957 metadata_fe
= udf_iget_special(sb
, &addr
);
959 if (IS_ERR(metadata_fe
)) {
960 udf_warn(sb
, "metadata inode efe not found\n");
963 if (UDF_I(metadata_fe
)->i_alloc_type
!= ICBTAG_FLAG_AD_SHORT
) {
964 udf_warn(sb
, "metadata inode efe does not have short allocation descriptors!\n");
966 return ERR_PTR(-EIO
);
972 static int udf_load_metadata_files(struct super_block
*sb
, int partition
,
975 struct udf_sb_info
*sbi
= UDF_SB(sb
);
976 struct udf_part_map
*map
;
977 struct udf_meta_data
*mdata
;
978 struct kernel_lb_addr addr
;
981 map
= &sbi
->s_partmaps
[partition
];
982 mdata
= &map
->s_type_specific
.s_metadata
;
983 mdata
->s_phys_partition_ref
= type1_index
;
985 /* metadata address */
986 udf_debug("Metadata file location: block = %d part = %d\n",
987 mdata
->s_meta_file_loc
, mdata
->s_phys_partition_ref
);
989 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_meta_file_loc
,
990 mdata
->s_phys_partition_ref
);
992 /* mirror file entry */
993 udf_debug("Mirror metadata file location: block = %d part = %d\n",
994 mdata
->s_mirror_file_loc
, mdata
->s_phys_partition_ref
);
996 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_mirror_file_loc
,
997 mdata
->s_phys_partition_ref
);
1000 udf_err(sb
, "Both metadata and mirror metadata inode efe can not found\n");
1003 mdata
->s_mirror_fe
= fe
;
1005 mdata
->s_metadata_fe
= fe
;
1011 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1013 if (mdata
->s_bitmap_file_loc
!= 0xFFFFFFFF) {
1014 addr
.logicalBlockNum
= mdata
->s_bitmap_file_loc
;
1015 addr
.partitionReferenceNum
= mdata
->s_phys_partition_ref
;
1017 udf_debug("Bitmap file location: block = %d part = %d\n",
1018 addr
.logicalBlockNum
, addr
.partitionReferenceNum
);
1020 fe
= udf_iget_special(sb
, &addr
);
1022 if (sb
->s_flags
& MS_RDONLY
)
1023 udf_warn(sb
, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1025 udf_err(sb
, "bitmap inode efe not found and attempted read-write mount\n");
1029 mdata
->s_bitmap_fe
= fe
;
1032 udf_debug("udf_load_metadata_files Ok\n");
1036 static void udf_load_fileset(struct super_block
*sb
, struct buffer_head
*bh
,
1037 struct kernel_lb_addr
*root
)
1039 struct fileSetDesc
*fset
;
1041 fset
= (struct fileSetDesc
*)bh
->b_data
;
1043 *root
= lelb_to_cpu(fset
->rootDirectoryICB
.extLocation
);
1045 UDF_SB(sb
)->s_serial_number
= le16_to_cpu(fset
->descTag
.tagSerialNum
);
1047 udf_debug("Rootdir at block=%d, partition=%d\n",
1048 root
->logicalBlockNum
, root
->partitionReferenceNum
);
1051 int udf_compute_nr_groups(struct super_block
*sb
, u32 partition
)
1053 struct udf_part_map
*map
= &UDF_SB(sb
)->s_partmaps
[partition
];
1054 return DIV_ROUND_UP(map
->s_partition_len
+
1055 (sizeof(struct spaceBitmapDesc
) << 3),
1056 sb
->s_blocksize
* 8);
1059 static struct udf_bitmap
*udf_sb_alloc_bitmap(struct super_block
*sb
, u32 index
)
1061 struct udf_bitmap
*bitmap
;
1065 nr_groups
= udf_compute_nr_groups(sb
, index
);
1066 size
= sizeof(struct udf_bitmap
) +
1067 (sizeof(struct buffer_head
*) * nr_groups
);
1069 if (size
<= PAGE_SIZE
)
1070 bitmap
= kzalloc(size
, GFP_KERNEL
);
1072 bitmap
= vzalloc(size
); /* TODO: get rid of vzalloc */
1077 bitmap
->s_nr_groups
= nr_groups
;
1081 static int udf_fill_partdesc_info(struct super_block
*sb
,
1082 struct partitionDesc
*p
, int p_index
)
1084 struct udf_part_map
*map
;
1085 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1086 struct partitionHeaderDesc
*phd
;
1088 map
= &sbi
->s_partmaps
[p_index
];
1090 map
->s_partition_len
= le32_to_cpu(p
->partitionLength
); /* blocks */
1091 map
->s_partition_root
= le32_to_cpu(p
->partitionStartingLocation
);
1093 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY
))
1094 map
->s_partition_flags
|= UDF_PART_FLAG_READ_ONLY
;
1095 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE
))
1096 map
->s_partition_flags
|= UDF_PART_FLAG_WRITE_ONCE
;
1097 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE
))
1098 map
->s_partition_flags
|= UDF_PART_FLAG_REWRITABLE
;
1099 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE
))
1100 map
->s_partition_flags
|= UDF_PART_FLAG_OVERWRITABLE
;
1102 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1103 p_index
, map
->s_partition_type
,
1104 map
->s_partition_root
, map
->s_partition_len
);
1106 if (strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR02
) &&
1107 strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR03
))
1110 phd
= (struct partitionHeaderDesc
*)p
->partitionContentsUse
;
1111 if (phd
->unallocSpaceTable
.extLength
) {
1112 struct kernel_lb_addr loc
= {
1113 .logicalBlockNum
= le32_to_cpu(
1114 phd
->unallocSpaceTable
.extPosition
),
1115 .partitionReferenceNum
= p_index
,
1117 struct inode
*inode
;
1119 inode
= udf_iget_special(sb
, &loc
);
1120 if (IS_ERR(inode
)) {
1121 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1123 return PTR_ERR(inode
);
1125 map
->s_uspace
.s_table
= inode
;
1126 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_TABLE
;
1127 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1128 p_index
, map
->s_uspace
.s_table
->i_ino
);
1131 if (phd
->unallocSpaceBitmap
.extLength
) {
1132 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1135 map
->s_uspace
.s_bitmap
= bitmap
;
1136 bitmap
->s_extPosition
= le32_to_cpu(
1137 phd
->unallocSpaceBitmap
.extPosition
);
1138 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_BITMAP
;
1139 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1140 p_index
, bitmap
->s_extPosition
);
1143 if (phd
->partitionIntegrityTable
.extLength
)
1144 udf_debug("partitionIntegrityTable (part %d)\n", p_index
);
1146 if (phd
->freedSpaceTable
.extLength
) {
1147 struct kernel_lb_addr loc
= {
1148 .logicalBlockNum
= le32_to_cpu(
1149 phd
->freedSpaceTable
.extPosition
),
1150 .partitionReferenceNum
= p_index
,
1152 struct inode
*inode
;
1154 inode
= udf_iget_special(sb
, &loc
);
1155 if (IS_ERR(inode
)) {
1156 udf_debug("cannot load freedSpaceTable (part %d)\n",
1158 return PTR_ERR(inode
);
1160 map
->s_fspace
.s_table
= inode
;
1161 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_TABLE
;
1162 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1163 p_index
, map
->s_fspace
.s_table
->i_ino
);
1166 if (phd
->freedSpaceBitmap
.extLength
) {
1167 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1170 map
->s_fspace
.s_bitmap
= bitmap
;
1171 bitmap
->s_extPosition
= le32_to_cpu(
1172 phd
->freedSpaceBitmap
.extPosition
);
1173 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_BITMAP
;
1174 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1175 p_index
, bitmap
->s_extPosition
);
1180 static void udf_find_vat_block(struct super_block
*sb
, int p_index
,
1181 int type1_index
, sector_t start_block
)
1183 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1184 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1186 struct kernel_lb_addr ino
;
1187 struct inode
*inode
;
1190 * VAT file entry is in the last recorded block. Some broken disks have
1191 * it a few blocks before so try a bit harder...
1193 ino
.partitionReferenceNum
= type1_index
;
1194 for (vat_block
= start_block
;
1195 vat_block
>= map
->s_partition_root
&&
1196 vat_block
>= start_block
- 3; vat_block
--) {
1197 ino
.logicalBlockNum
= vat_block
- map
->s_partition_root
;
1198 inode
= udf_iget_special(sb
, &ino
);
1199 if (!IS_ERR(inode
)) {
1200 sbi
->s_vat_inode
= inode
;
1206 static int udf_load_vat(struct super_block
*sb
, int p_index
, int type1_index
)
1208 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1209 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1210 struct buffer_head
*bh
= NULL
;
1211 struct udf_inode_info
*vati
;
1213 struct virtualAllocationTable20
*vat20
;
1214 sector_t blocks
= i_size_read(sb
->s_bdev
->bd_inode
) >>
1215 sb
->s_blocksize_bits
;
1217 udf_find_vat_block(sb
, p_index
, type1_index
, sbi
->s_last_block
);
1218 if (!sbi
->s_vat_inode
&&
1219 sbi
->s_last_block
!= blocks
- 1) {
1220 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1221 (unsigned long)sbi
->s_last_block
,
1222 (unsigned long)blocks
- 1);
1223 udf_find_vat_block(sb
, p_index
, type1_index
, blocks
- 1);
1225 if (!sbi
->s_vat_inode
)
1228 if (map
->s_partition_type
== UDF_VIRTUAL_MAP15
) {
1229 map
->s_type_specific
.s_virtual
.s_start_offset
= 0;
1230 map
->s_type_specific
.s_virtual
.s_num_entries
=
1231 (sbi
->s_vat_inode
->i_size
- 36) >> 2;
1232 } else if (map
->s_partition_type
== UDF_VIRTUAL_MAP20
) {
1233 vati
= UDF_I(sbi
->s_vat_inode
);
1234 if (vati
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
1235 pos
= udf_block_map(sbi
->s_vat_inode
, 0);
1236 bh
= sb_bread(sb
, pos
);
1239 vat20
= (struct virtualAllocationTable20
*)bh
->b_data
;
1241 vat20
= (struct virtualAllocationTable20
*)
1245 map
->s_type_specific
.s_virtual
.s_start_offset
=
1246 le16_to_cpu(vat20
->lengthHeader
);
1247 map
->s_type_specific
.s_virtual
.s_num_entries
=
1248 (sbi
->s_vat_inode
->i_size
-
1249 map
->s_type_specific
.s_virtual
.
1250 s_start_offset
) >> 2;
1257 * Load partition descriptor block
1259 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1262 static int udf_load_partdesc(struct super_block
*sb
, sector_t block
)
1264 struct buffer_head
*bh
;
1265 struct partitionDesc
*p
;
1266 struct udf_part_map
*map
;
1267 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1269 uint16_t partitionNumber
;
1273 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1276 if (ident
!= TAG_IDENT_PD
) {
1281 p
= (struct partitionDesc
*)bh
->b_data
;
1282 partitionNumber
= le16_to_cpu(p
->partitionNumber
);
1284 /* First scan for TYPE1 and SPARABLE partitions */
1285 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1286 map
= &sbi
->s_partmaps
[i
];
1287 udf_debug("Searching map: (%d == %d)\n",
1288 map
->s_partition_num
, partitionNumber
);
1289 if (map
->s_partition_num
== partitionNumber
&&
1290 (map
->s_partition_type
== UDF_TYPE1_MAP15
||
1291 map
->s_partition_type
== UDF_SPARABLE_MAP15
))
1295 if (i
>= sbi
->s_partitions
) {
1296 udf_debug("Partition (%d) not found in partition map\n",
1302 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1307 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1308 * PHYSICAL partitions are already set up
1312 map
= NULL
; /* supress 'maybe used uninitialized' warning */
1314 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1315 map
= &sbi
->s_partmaps
[i
];
1317 if (map
->s_partition_num
== partitionNumber
&&
1318 (map
->s_partition_type
== UDF_VIRTUAL_MAP15
||
1319 map
->s_partition_type
== UDF_VIRTUAL_MAP20
||
1320 map
->s_partition_type
== UDF_METADATA_MAP25
))
1324 if (i
>= sbi
->s_partitions
) {
1329 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1333 if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
1334 ret
= udf_load_metadata_files(sb
, i
, type1_idx
);
1336 udf_err(sb
, "error loading MetaData partition map %d\n",
1342 * If we have a partition with virtual map, we don't handle
1343 * writing to it (we overwrite blocks instead of relocating
1346 if (!(sb
->s_flags
& MS_RDONLY
)) {
1350 ret
= udf_load_vat(sb
, i
, type1_idx
);
1356 /* In case loading failed, we handle cleanup in udf_fill_super */
1361 static int udf_load_sparable_map(struct super_block
*sb
,
1362 struct udf_part_map
*map
,
1363 struct sparablePartitionMap
*spm
)
1367 struct sparingTable
*st
;
1368 struct udf_sparing_data
*sdata
= &map
->s_type_specific
.s_sparing
;
1370 struct buffer_head
*bh
;
1372 map
->s_partition_type
= UDF_SPARABLE_MAP15
;
1373 sdata
->s_packet_len
= le16_to_cpu(spm
->packetLength
);
1374 if (!is_power_of_2(sdata
->s_packet_len
)) {
1375 udf_err(sb
, "error loading logical volume descriptor: "
1376 "Invalid packet length %u\n",
1377 (unsigned)sdata
->s_packet_len
);
1380 if (spm
->numSparingTables
> 4) {
1381 udf_err(sb
, "error loading logical volume descriptor: "
1382 "Too many sparing tables (%d)\n",
1383 (int)spm
->numSparingTables
);
1387 for (i
= 0; i
< spm
->numSparingTables
; i
++) {
1388 loc
= le32_to_cpu(spm
->locSparingTable
[i
]);
1389 bh
= udf_read_tagged(sb
, loc
, loc
, &ident
);
1393 st
= (struct sparingTable
*)bh
->b_data
;
1395 strncmp(st
->sparingIdent
.ident
, UDF_ID_SPARING
,
1396 strlen(UDF_ID_SPARING
)) ||
1397 sizeof(*st
) + le16_to_cpu(st
->reallocationTableLen
) >
1403 sdata
->s_spar_map
[i
] = bh
;
1405 map
->s_partition_func
= udf_get_pblock_spar15
;
1409 static int udf_load_logicalvol(struct super_block
*sb
, sector_t block
,
1410 struct kernel_lb_addr
*fileset
)
1412 struct logicalVolDesc
*lvd
;
1415 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1416 struct genericPartitionMap
*gpm
;
1418 struct buffer_head
*bh
;
1419 unsigned int table_len
;
1422 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1425 BUG_ON(ident
!= TAG_IDENT_LVD
);
1426 lvd
= (struct logicalVolDesc
*)bh
->b_data
;
1427 table_len
= le32_to_cpu(lvd
->mapTableLength
);
1428 if (table_len
> sb
->s_blocksize
- sizeof(*lvd
)) {
1429 udf_err(sb
, "error loading logical volume descriptor: "
1430 "Partition table too long (%u > %lu)\n", table_len
,
1431 sb
->s_blocksize
- sizeof(*lvd
));
1436 ret
= udf_sb_alloc_partition_maps(sb
, le32_to_cpu(lvd
->numPartitionMaps
));
1440 for (i
= 0, offset
= 0;
1441 i
< sbi
->s_partitions
&& offset
< table_len
;
1442 i
++, offset
+= gpm
->partitionMapLength
) {
1443 struct udf_part_map
*map
= &sbi
->s_partmaps
[i
];
1444 gpm
= (struct genericPartitionMap
*)
1445 &(lvd
->partitionMaps
[offset
]);
1446 type
= gpm
->partitionMapType
;
1448 struct genericPartitionMap1
*gpm1
=
1449 (struct genericPartitionMap1
*)gpm
;
1450 map
->s_partition_type
= UDF_TYPE1_MAP15
;
1451 map
->s_volumeseqnum
= le16_to_cpu(gpm1
->volSeqNum
);
1452 map
->s_partition_num
= le16_to_cpu(gpm1
->partitionNum
);
1453 map
->s_partition_func
= NULL
;
1454 } else if (type
== 2) {
1455 struct udfPartitionMap2
*upm2
=
1456 (struct udfPartitionMap2
*)gpm
;
1457 if (!strncmp(upm2
->partIdent
.ident
, UDF_ID_VIRTUAL
,
1458 strlen(UDF_ID_VIRTUAL
))) {
1460 le16_to_cpu(((__le16
*)upm2
->partIdent
.
1463 map
->s_partition_type
=
1465 map
->s_partition_func
=
1466 udf_get_pblock_virt15
;
1468 map
->s_partition_type
=
1470 map
->s_partition_func
=
1471 udf_get_pblock_virt20
;
1473 } else if (!strncmp(upm2
->partIdent
.ident
,
1475 strlen(UDF_ID_SPARABLE
))) {
1476 ret
= udf_load_sparable_map(sb
, map
,
1477 (struct sparablePartitionMap
*)gpm
);
1480 } else if (!strncmp(upm2
->partIdent
.ident
,
1482 strlen(UDF_ID_METADATA
))) {
1483 struct udf_meta_data
*mdata
=
1484 &map
->s_type_specific
.s_metadata
;
1485 struct metadataPartitionMap
*mdm
=
1486 (struct metadataPartitionMap
*)
1487 &(lvd
->partitionMaps
[offset
]);
1488 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1489 i
, type
, UDF_ID_METADATA
);
1491 map
->s_partition_type
= UDF_METADATA_MAP25
;
1492 map
->s_partition_func
= udf_get_pblock_meta25
;
1494 mdata
->s_meta_file_loc
=
1495 le32_to_cpu(mdm
->metadataFileLoc
);
1496 mdata
->s_mirror_file_loc
=
1497 le32_to_cpu(mdm
->metadataMirrorFileLoc
);
1498 mdata
->s_bitmap_file_loc
=
1499 le32_to_cpu(mdm
->metadataBitmapFileLoc
);
1500 mdata
->s_alloc_unit_size
=
1501 le32_to_cpu(mdm
->allocUnitSize
);
1502 mdata
->s_align_unit_size
=
1503 le16_to_cpu(mdm
->alignUnitSize
);
1504 if (mdm
->flags
& 0x01)
1505 mdata
->s_flags
|= MF_DUPLICATE_MD
;
1507 udf_debug("Metadata Ident suffix=0x%x\n",
1508 le16_to_cpu(*(__le16
*)
1509 mdm
->partIdent
.identSuffix
));
1510 udf_debug("Metadata part num=%d\n",
1511 le16_to_cpu(mdm
->partitionNum
));
1512 udf_debug("Metadata part alloc unit size=%d\n",
1513 le32_to_cpu(mdm
->allocUnitSize
));
1514 udf_debug("Metadata file loc=%d\n",
1515 le32_to_cpu(mdm
->metadataFileLoc
));
1516 udf_debug("Mirror file loc=%d\n",
1517 le32_to_cpu(mdm
->metadataMirrorFileLoc
));
1518 udf_debug("Bitmap file loc=%d\n",
1519 le32_to_cpu(mdm
->metadataBitmapFileLoc
));
1520 udf_debug("Flags: %d %d\n",
1521 mdata
->s_flags
, mdm
->flags
);
1523 udf_debug("Unknown ident: %s\n",
1524 upm2
->partIdent
.ident
);
1527 map
->s_volumeseqnum
= le16_to_cpu(upm2
->volSeqNum
);
1528 map
->s_partition_num
= le16_to_cpu(upm2
->partitionNum
);
1530 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1531 i
, map
->s_partition_num
, type
, map
->s_volumeseqnum
);
1535 struct long_ad
*la
= (struct long_ad
*)&(lvd
->logicalVolContentsUse
[0]);
1537 *fileset
= lelb_to_cpu(la
->extLocation
);
1538 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1539 fileset
->logicalBlockNum
,
1540 fileset
->partitionReferenceNum
);
1542 if (lvd
->integritySeqExt
.extLength
)
1543 udf_load_logicalvolint(sb
, leea_to_cpu(lvd
->integritySeqExt
));
1551 * Find the prevailing Logical Volume Integrity Descriptor.
1553 static void udf_load_logicalvolint(struct super_block
*sb
, struct kernel_extent_ad loc
)
1555 struct buffer_head
*bh
, *final_bh
;
1557 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1558 struct logicalVolIntegrityDesc
*lvid
;
1559 int indirections
= 0;
1561 while (++indirections
<= UDF_MAX_LVID_NESTING
) {
1563 while (loc
.extLength
> 0 &&
1564 (bh
= udf_read_tagged(sb
, loc
.extLocation
,
1565 loc
.extLocation
, &ident
))) {
1566 if (ident
!= TAG_IDENT_LVID
) {
1574 loc
.extLength
-= sb
->s_blocksize
;
1581 brelse(sbi
->s_lvid_bh
);
1582 sbi
->s_lvid_bh
= final_bh
;
1584 lvid
= (struct logicalVolIntegrityDesc
*)final_bh
->b_data
;
1585 if (lvid
->nextIntegrityExt
.extLength
== 0)
1588 loc
= leea_to_cpu(lvid
->nextIntegrityExt
);
1591 udf_warn(sb
, "Too many LVID indirections (max %u), ignoring.\n",
1592 UDF_MAX_LVID_NESTING
);
1593 brelse(sbi
->s_lvid_bh
);
1594 sbi
->s_lvid_bh
= NULL
;
1599 * Process a main/reserve volume descriptor sequence.
1600 * @block First block of first extent of the sequence.
1601 * @lastblock Lastblock of first extent of the sequence.
1602 * @fileset There we store extent containing root fileset
1604 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1607 static noinline
int udf_process_sequence(
1608 struct super_block
*sb
,
1609 sector_t block
, sector_t lastblock
,
1610 struct kernel_lb_addr
*fileset
)
1612 struct buffer_head
*bh
= NULL
;
1613 struct udf_vds_record vds
[VDS_POS_LENGTH
];
1614 struct udf_vds_record
*curr
;
1615 struct generic_desc
*gd
;
1616 struct volDescPtr
*vdp
;
1620 long next_s
= 0, next_e
= 0;
1622 unsigned int indirections
= 0;
1624 memset(vds
, 0, sizeof(struct udf_vds_record
) * VDS_POS_LENGTH
);
1627 * Read the main descriptor sequence and find which descriptors
1630 for (; (!done
&& block
<= lastblock
); block
++) {
1632 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1635 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1636 (unsigned long long)block
);
1640 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1641 gd
= (struct generic_desc
*)bh
->b_data
;
1642 vdsn
= le32_to_cpu(gd
->volDescSeqNum
);
1644 case TAG_IDENT_PVD
: /* ISO 13346 3/10.1 */
1645 curr
= &vds
[VDS_POS_PRIMARY_VOL_DESC
];
1646 if (vdsn
>= curr
->volDescSeqNum
) {
1647 curr
->volDescSeqNum
= vdsn
;
1648 curr
->block
= block
;
1651 case TAG_IDENT_VDP
: /* ISO 13346 3/10.3 */
1652 curr
= &vds
[VDS_POS_VOL_DESC_PTR
];
1653 if (vdsn
>= curr
->volDescSeqNum
) {
1654 curr
->volDescSeqNum
= vdsn
;
1655 curr
->block
= block
;
1657 vdp
= (struct volDescPtr
*)bh
->b_data
;
1658 next_s
= le32_to_cpu(
1659 vdp
->nextVolDescSeqExt
.extLocation
);
1660 next_e
= le32_to_cpu(
1661 vdp
->nextVolDescSeqExt
.extLength
);
1662 next_e
= next_e
>> sb
->s_blocksize_bits
;
1666 case TAG_IDENT_IUVD
: /* ISO 13346 3/10.4 */
1667 curr
= &vds
[VDS_POS_IMP_USE_VOL_DESC
];
1668 if (vdsn
>= curr
->volDescSeqNum
) {
1669 curr
->volDescSeqNum
= vdsn
;
1670 curr
->block
= block
;
1673 case TAG_IDENT_PD
: /* ISO 13346 3/10.5 */
1674 curr
= &vds
[VDS_POS_PARTITION_DESC
];
1676 curr
->block
= block
;
1678 case TAG_IDENT_LVD
: /* ISO 13346 3/10.6 */
1679 curr
= &vds
[VDS_POS_LOGICAL_VOL_DESC
];
1680 if (vdsn
>= curr
->volDescSeqNum
) {
1681 curr
->volDescSeqNum
= vdsn
;
1682 curr
->block
= block
;
1685 case TAG_IDENT_USD
: /* ISO 13346 3/10.8 */
1686 curr
= &vds
[VDS_POS_UNALLOC_SPACE_DESC
];
1687 if (vdsn
>= curr
->volDescSeqNum
) {
1688 curr
->volDescSeqNum
= vdsn
;
1689 curr
->block
= block
;
1692 case TAG_IDENT_TD
: /* ISO 13346 3/10.9 */
1693 if (++indirections
> UDF_MAX_TD_NESTING
) {
1694 udf_err(sb
, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING
);
1699 vds
[VDS_POS_TERMINATING_DESC
].block
= block
;
1703 next_s
= next_e
= 0;
1711 * Now read interesting descriptors again and process them
1712 * in a suitable order
1714 if (!vds
[VDS_POS_PRIMARY_VOL_DESC
].block
) {
1715 udf_err(sb
, "Primary Volume Descriptor not found!\n");
1718 ret
= udf_load_pvoldesc(sb
, vds
[VDS_POS_PRIMARY_VOL_DESC
].block
);
1722 if (vds
[VDS_POS_LOGICAL_VOL_DESC
].block
) {
1723 ret
= udf_load_logicalvol(sb
,
1724 vds
[VDS_POS_LOGICAL_VOL_DESC
].block
,
1730 if (vds
[VDS_POS_PARTITION_DESC
].block
) {
1732 * We rescan the whole descriptor sequence to find
1733 * partition descriptor blocks and process them.
1735 for (block
= vds
[VDS_POS_PARTITION_DESC
].block
;
1736 block
< vds
[VDS_POS_TERMINATING_DESC
].block
;
1738 ret
= udf_load_partdesc(sb
, block
);
1748 * Load Volume Descriptor Sequence described by anchor in bh
1750 * Returns <0 on error, 0 on success
1752 static int udf_load_sequence(struct super_block
*sb
, struct buffer_head
*bh
,
1753 struct kernel_lb_addr
*fileset
)
1755 struct anchorVolDescPtr
*anchor
;
1756 sector_t main_s
, main_e
, reserve_s
, reserve_e
;
1759 anchor
= (struct anchorVolDescPtr
*)bh
->b_data
;
1761 /* Locate the main sequence */
1762 main_s
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLocation
);
1763 main_e
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLength
);
1764 main_e
= main_e
>> sb
->s_blocksize_bits
;
1767 /* Locate the reserve sequence */
1768 reserve_s
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLocation
);
1769 reserve_e
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLength
);
1770 reserve_e
= reserve_e
>> sb
->s_blocksize_bits
;
1771 reserve_e
+= reserve_s
;
1773 /* Process the main & reserve sequences */
1774 /* responsible for finding the PartitionDesc(s) */
1775 ret
= udf_process_sequence(sb
, main_s
, main_e
, fileset
);
1778 udf_sb_free_partitions(sb
);
1779 ret
= udf_process_sequence(sb
, reserve_s
, reserve_e
, fileset
);
1781 udf_sb_free_partitions(sb
);
1782 /* No sequence was OK, return -EIO */
1790 * Check whether there is an anchor block in the given block and
1791 * load Volume Descriptor Sequence if so.
1793 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1796 static int udf_check_anchor_block(struct super_block
*sb
, sector_t block
,
1797 struct kernel_lb_addr
*fileset
)
1799 struct buffer_head
*bh
;
1803 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_VARCONV
) &&
1804 udf_fixed_to_variable(block
) >=
1805 i_size_read(sb
->s_bdev
->bd_inode
) >> sb
->s_blocksize_bits
)
1808 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1811 if (ident
!= TAG_IDENT_AVDP
) {
1815 ret
= udf_load_sequence(sb
, bh
, fileset
);
1821 * Search for an anchor volume descriptor pointer.
1823 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1826 static int udf_scan_anchors(struct super_block
*sb
, sector_t
*lastblock
,
1827 struct kernel_lb_addr
*fileset
)
1831 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1835 /* First try user provided anchor */
1836 if (sbi
->s_anchor
) {
1837 ret
= udf_check_anchor_block(sb
, sbi
->s_anchor
, fileset
);
1842 * according to spec, anchor is in either:
1846 * however, if the disc isn't closed, it could be 512.
1848 ret
= udf_check_anchor_block(sb
, sbi
->s_session
+ 256, fileset
);
1852 * The trouble is which block is the last one. Drives often misreport
1853 * this so we try various possibilities.
1855 last
[last_count
++] = *lastblock
;
1856 if (*lastblock
>= 1)
1857 last
[last_count
++] = *lastblock
- 1;
1858 last
[last_count
++] = *lastblock
+ 1;
1859 if (*lastblock
>= 2)
1860 last
[last_count
++] = *lastblock
- 2;
1861 if (*lastblock
>= 150)
1862 last
[last_count
++] = *lastblock
- 150;
1863 if (*lastblock
>= 152)
1864 last
[last_count
++] = *lastblock
- 152;
1866 for (i
= 0; i
< last_count
; i
++) {
1867 if (last
[i
] >= i_size_read(sb
->s_bdev
->bd_inode
) >>
1868 sb
->s_blocksize_bits
)
1870 ret
= udf_check_anchor_block(sb
, last
[i
], fileset
);
1871 if (ret
!= -EAGAIN
) {
1873 *lastblock
= last
[i
];
1878 ret
= udf_check_anchor_block(sb
, last
[i
] - 256, fileset
);
1879 if (ret
!= -EAGAIN
) {
1881 *lastblock
= last
[i
];
1886 /* Finally try block 512 in case media is open */
1887 return udf_check_anchor_block(sb
, sbi
->s_session
+ 512, fileset
);
1891 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1892 * area specified by it. The function expects sbi->s_lastblock to be the last
1893 * block on the media.
1895 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1898 static int udf_find_anchor(struct super_block
*sb
,
1899 struct kernel_lb_addr
*fileset
)
1901 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1902 sector_t lastblock
= sbi
->s_last_block
;
1905 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1909 /* No anchor found? Try VARCONV conversion of block numbers */
1910 UDF_SET_FLAG(sb
, UDF_FLAG_VARCONV
);
1911 lastblock
= udf_variable_to_fixed(sbi
->s_last_block
);
1912 /* Firstly, we try to not convert number of the last block */
1913 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1917 lastblock
= sbi
->s_last_block
;
1918 /* Secondly, we try with converted number of the last block */
1919 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1921 /* VARCONV didn't help. Clear it. */
1922 UDF_CLEAR_FLAG(sb
, UDF_FLAG_VARCONV
);
1926 sbi
->s_last_block
= lastblock
;
1931 * Check Volume Structure Descriptor, find Anchor block and load Volume
1932 * Descriptor Sequence.
1934 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1935 * block was not found.
1937 static int udf_load_vrs(struct super_block
*sb
, struct udf_options
*uopt
,
1938 int silent
, struct kernel_lb_addr
*fileset
)
1940 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1944 if (!sb_set_blocksize(sb
, uopt
->blocksize
)) {
1946 udf_warn(sb
, "Bad block size\n");
1949 sbi
->s_last_block
= uopt
->lastblock
;
1951 /* Check that it is NSR02 compliant */
1952 nsr_off
= udf_check_vsd(sb
);
1955 udf_warn(sb
, "No VRS found\n");
1959 udf_debug("Failed to read sector at offset %d. "
1960 "Assuming open disc. Skipping validity "
1961 "check\n", VSD_FIRST_SECTOR_OFFSET
);
1962 if (!sbi
->s_last_block
)
1963 sbi
->s_last_block
= udf_get_last_block(sb
);
1965 udf_debug("Validity check skipped because of novrs option\n");
1968 /* Look for anchor block and load Volume Descriptor Sequence */
1969 sbi
->s_anchor
= uopt
->anchor
;
1970 ret
= udf_find_anchor(sb
, fileset
);
1972 if (!silent
&& ret
== -EAGAIN
)
1973 udf_warn(sb
, "No anchor found\n");
1979 static void udf_open_lvid(struct super_block
*sb
)
1981 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1982 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1983 struct logicalVolIntegrityDesc
*lvid
;
1984 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1989 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1990 lvidiu
= udf_sb_lvidiu(sb
);
1994 mutex_lock(&sbi
->s_alloc_mutex
);
1995 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1996 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1997 ktime_get_real_ts(&ts
);
1998 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, ts
);
1999 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN
);
2001 lvid
->descTag
.descCRC
= cpu_to_le16(
2002 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
2003 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
2005 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
2006 mark_buffer_dirty(bh
);
2007 sbi
->s_lvid_dirty
= 0;
2008 mutex_unlock(&sbi
->s_alloc_mutex
);
2009 /* Make opening of filesystem visible on the media immediately */
2010 sync_dirty_buffer(bh
);
2013 static void udf_close_lvid(struct super_block
*sb
)
2015 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2016 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
2017 struct logicalVolIntegrityDesc
*lvid
;
2018 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2023 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2024 lvidiu
= udf_sb_lvidiu(sb
);
2028 mutex_lock(&sbi
->s_alloc_mutex
);
2029 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
2030 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
2031 ktime_get_real_ts(&ts
);
2032 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, ts
);
2033 if (UDF_MAX_WRITE_VERSION
> le16_to_cpu(lvidiu
->maxUDFWriteRev
))
2034 lvidiu
->maxUDFWriteRev
= cpu_to_le16(UDF_MAX_WRITE_VERSION
);
2035 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFReadRev
))
2036 lvidiu
->minUDFReadRev
= cpu_to_le16(sbi
->s_udfrev
);
2037 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFWriteRev
))
2038 lvidiu
->minUDFWriteRev
= cpu_to_le16(sbi
->s_udfrev
);
2039 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE
);
2041 lvid
->descTag
.descCRC
= cpu_to_le16(
2042 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
2043 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
2045 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
2047 * We set buffer uptodate unconditionally here to avoid spurious
2048 * warnings from mark_buffer_dirty() when previous EIO has marked
2049 * the buffer as !uptodate
2051 set_buffer_uptodate(bh
);
2052 mark_buffer_dirty(bh
);
2053 sbi
->s_lvid_dirty
= 0;
2054 mutex_unlock(&sbi
->s_alloc_mutex
);
2055 /* Make closing of filesystem visible on the media immediately */
2056 sync_dirty_buffer(bh
);
2059 u64
lvid_get_unique_id(struct super_block
*sb
)
2061 struct buffer_head
*bh
;
2062 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2063 struct logicalVolIntegrityDesc
*lvid
;
2064 struct logicalVolHeaderDesc
*lvhd
;
2068 bh
= sbi
->s_lvid_bh
;
2072 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2073 lvhd
= (struct logicalVolHeaderDesc
*)lvid
->logicalVolContentsUse
;
2075 mutex_lock(&sbi
->s_alloc_mutex
);
2076 ret
= uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
2077 if (!(++uniqueID
& 0xFFFFFFFF))
2079 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
2080 mutex_unlock(&sbi
->s_alloc_mutex
);
2081 mark_buffer_dirty(bh
);
2086 static int udf_fill_super(struct super_block
*sb
, void *options
, int silent
)
2089 struct inode
*inode
= NULL
;
2090 struct udf_options uopt
;
2091 struct kernel_lb_addr rootdir
, fileset
;
2092 struct udf_sb_info
*sbi
;
2093 bool lvid_open
= false;
2095 uopt
.flags
= (1 << UDF_FLAG_USE_AD_IN_ICB
) | (1 << UDF_FLAG_STRICT
);
2096 uopt
.uid
= INVALID_UID
;
2097 uopt
.gid
= INVALID_GID
;
2099 uopt
.fmode
= UDF_INVALID_MODE
;
2100 uopt
.dmode
= UDF_INVALID_MODE
;
2102 sbi
= kzalloc(sizeof(struct udf_sb_info
), GFP_KERNEL
);
2106 sb
->s_fs_info
= sbi
;
2108 mutex_init(&sbi
->s_alloc_mutex
);
2110 if (!udf_parse_options((char *)options
, &uopt
, false))
2111 goto parse_options_failure
;
2113 if (uopt
.flags
& (1 << UDF_FLAG_UTF8
) &&
2114 uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) {
2115 udf_err(sb
, "utf8 cannot be combined with iocharset\n");
2116 goto parse_options_failure
;
2118 #ifdef CONFIG_UDF_NLS
2119 if ((uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) && !uopt
.nls_map
) {
2120 uopt
.nls_map
= load_nls_default();
2122 uopt
.flags
&= ~(1 << UDF_FLAG_NLS_MAP
);
2124 udf_debug("Using default NLS map\n");
2127 if (!(uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)))
2128 uopt
.flags
|= (1 << UDF_FLAG_UTF8
);
2130 fileset
.logicalBlockNum
= 0xFFFFFFFF;
2131 fileset
.partitionReferenceNum
= 0xFFFF;
2133 sbi
->s_flags
= uopt
.flags
;
2134 sbi
->s_uid
= uopt
.uid
;
2135 sbi
->s_gid
= uopt
.gid
;
2136 sbi
->s_umask
= uopt
.umask
;
2137 sbi
->s_fmode
= uopt
.fmode
;
2138 sbi
->s_dmode
= uopt
.dmode
;
2139 sbi
->s_nls_map
= uopt
.nls_map
;
2140 rwlock_init(&sbi
->s_cred_lock
);
2142 if (uopt
.session
== 0xFFFFFFFF)
2143 sbi
->s_session
= udf_get_last_session(sb
);
2145 sbi
->s_session
= uopt
.session
;
2147 udf_debug("Multi-session=%d\n", sbi
->s_session
);
2149 /* Fill in the rest of the superblock */
2150 sb
->s_op
= &udf_sb_ops
;
2151 sb
->s_export_op
= &udf_export_ops
;
2153 sb
->s_magic
= UDF_SUPER_MAGIC
;
2154 sb
->s_time_gran
= 1000;
2156 if (uopt
.flags
& (1 << UDF_FLAG_BLOCKSIZE_SET
)) {
2157 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2159 uopt
.blocksize
= bdev_logical_block_size(sb
->s_bdev
);
2160 while (uopt
.blocksize
<= 4096) {
2161 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2163 if (!silent
&& ret
!= -EACCES
) {
2164 pr_notice("Scanning with blocksize %d failed\n",
2167 brelse(sbi
->s_lvid_bh
);
2168 sbi
->s_lvid_bh
= NULL
;
2170 * EACCES is special - we want to propagate to
2171 * upper layers that we cannot handle RW mount.
2178 uopt
.blocksize
<<= 1;
2182 if (ret
== -EAGAIN
) {
2183 udf_warn(sb
, "No partition found (1)\n");
2189 udf_debug("Lastblock=%d\n", sbi
->s_last_block
);
2191 if (sbi
->s_lvid_bh
) {
2192 struct logicalVolIntegrityDescImpUse
*lvidiu
=
2194 uint16_t minUDFReadRev
;
2195 uint16_t minUDFWriteRev
;
2201 minUDFReadRev
= le16_to_cpu(lvidiu
->minUDFReadRev
);
2202 minUDFWriteRev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
2203 if (minUDFReadRev
> UDF_MAX_READ_VERSION
) {
2204 udf_err(sb
, "minUDFReadRev=%x (max is %x)\n",
2206 UDF_MAX_READ_VERSION
);
2209 } else if (minUDFWriteRev
> UDF_MAX_WRITE_VERSION
&&
2210 !(sb
->s_flags
& MS_RDONLY
)) {
2215 sbi
->s_udfrev
= minUDFWriteRev
;
2217 if (minUDFReadRev
>= UDF_VERS_USE_EXTENDED_FE
)
2218 UDF_SET_FLAG(sb
, UDF_FLAG_USE_EXTENDED_FE
);
2219 if (minUDFReadRev
>= UDF_VERS_USE_STREAMS
)
2220 UDF_SET_FLAG(sb
, UDF_FLAG_USE_STREAMS
);
2223 if (!sbi
->s_partitions
) {
2224 udf_warn(sb
, "No partition found (2)\n");
2229 if (sbi
->s_partmaps
[sbi
->s_partition
].s_partition_flags
&
2230 UDF_PART_FLAG_READ_ONLY
&&
2231 !(sb
->s_flags
& MS_RDONLY
)) {
2236 if (udf_find_fileset(sb
, &fileset
, &rootdir
)) {
2237 udf_warn(sb
, "No fileset found\n");
2243 struct timestamp ts
;
2244 udf_time_to_disk_stamp(&ts
, sbi
->s_record_time
);
2245 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2246 sbi
->s_volume_ident
,
2247 le16_to_cpu(ts
.year
), ts
.month
, ts
.day
,
2248 ts
.hour
, ts
.minute
, le16_to_cpu(ts
.typeAndTimezone
));
2250 if (!(sb
->s_flags
& MS_RDONLY
)) {
2255 /* Assign the root inode */
2256 /* assign inodes by physical block number */
2257 /* perhaps it's not extensible enough, but for now ... */
2258 inode
= udf_iget(sb
, &rootdir
);
2259 if (IS_ERR(inode
)) {
2260 udf_err(sb
, "Error in udf_iget, block=%d, partition=%d\n",
2261 rootdir
.logicalBlockNum
, rootdir
.partitionReferenceNum
);
2262 ret
= PTR_ERR(inode
);
2266 /* Allocate a dentry for the root inode */
2267 sb
->s_root
= d_make_root(inode
);
2269 udf_err(sb
, "Couldn't allocate root dentry\n");
2273 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
2274 sb
->s_max_links
= UDF_MAX_LINKS
;
2278 iput(sbi
->s_vat_inode
);
2279 parse_options_failure
:
2280 #ifdef CONFIG_UDF_NLS
2281 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2282 unload_nls(sbi
->s_nls_map
);
2286 brelse(sbi
->s_lvid_bh
);
2287 udf_sb_free_partitions(sb
);
2289 sb
->s_fs_info
= NULL
;
2294 void _udf_err(struct super_block
*sb
, const char *function
,
2295 const char *fmt
, ...)
2297 struct va_format vaf
;
2300 va_start(args
, fmt
);
2305 pr_err("error (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2310 void _udf_warn(struct super_block
*sb
, const char *function
,
2311 const char *fmt
, ...)
2313 struct va_format vaf
;
2316 va_start(args
, fmt
);
2321 pr_warn("warning (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2326 static void udf_put_super(struct super_block
*sb
)
2328 struct udf_sb_info
*sbi
;
2332 iput(sbi
->s_vat_inode
);
2333 #ifdef CONFIG_UDF_NLS
2334 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2335 unload_nls(sbi
->s_nls_map
);
2337 if (!(sb
->s_flags
& MS_RDONLY
))
2339 brelse(sbi
->s_lvid_bh
);
2340 udf_sb_free_partitions(sb
);
2341 mutex_destroy(&sbi
->s_alloc_mutex
);
2342 kfree(sb
->s_fs_info
);
2343 sb
->s_fs_info
= NULL
;
2346 static int udf_sync_fs(struct super_block
*sb
, int wait
)
2348 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2350 mutex_lock(&sbi
->s_alloc_mutex
);
2351 if (sbi
->s_lvid_dirty
) {
2353 * Blockdevice will be synced later so we don't have to submit
2356 mark_buffer_dirty(sbi
->s_lvid_bh
);
2357 sbi
->s_lvid_dirty
= 0;
2359 mutex_unlock(&sbi
->s_alloc_mutex
);
2364 static int udf_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2366 struct super_block
*sb
= dentry
->d_sb
;
2367 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2368 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2369 u64 id
= huge_encode_dev(sb
->s_bdev
->bd_dev
);
2371 lvidiu
= udf_sb_lvidiu(sb
);
2372 buf
->f_type
= UDF_SUPER_MAGIC
;
2373 buf
->f_bsize
= sb
->s_blocksize
;
2374 buf
->f_blocks
= sbi
->s_partmaps
[sbi
->s_partition
].s_partition_len
;
2375 buf
->f_bfree
= udf_count_free(sb
);
2376 buf
->f_bavail
= buf
->f_bfree
;
2377 buf
->f_files
= (lvidiu
!= NULL
? (le32_to_cpu(lvidiu
->numFiles
) +
2378 le32_to_cpu(lvidiu
->numDirs
)) : 0)
2380 buf
->f_ffree
= buf
->f_bfree
;
2381 buf
->f_namelen
= UDF_NAME_LEN
;
2382 buf
->f_fsid
.val
[0] = (u32
)id
;
2383 buf
->f_fsid
.val
[1] = (u32
)(id
>> 32);
2388 static unsigned int udf_count_free_bitmap(struct super_block
*sb
,
2389 struct udf_bitmap
*bitmap
)
2391 struct buffer_head
*bh
= NULL
;
2392 unsigned int accum
= 0;
2394 int block
= 0, newblock
;
2395 struct kernel_lb_addr loc
;
2399 struct spaceBitmapDesc
*bm
;
2401 loc
.logicalBlockNum
= bitmap
->s_extPosition
;
2402 loc
.partitionReferenceNum
= UDF_SB(sb
)->s_partition
;
2403 bh
= udf_read_ptagged(sb
, &loc
, 0, &ident
);
2406 udf_err(sb
, "udf_count_free failed\n");
2408 } else if (ident
!= TAG_IDENT_SBD
) {
2410 udf_err(sb
, "udf_count_free failed\n");
2414 bm
= (struct spaceBitmapDesc
*)bh
->b_data
;
2415 bytes
= le32_to_cpu(bm
->numOfBytes
);
2416 index
= sizeof(struct spaceBitmapDesc
); /* offset in first block only */
2417 ptr
= (uint8_t *)bh
->b_data
;
2420 u32 cur_bytes
= min_t(u32
, bytes
, sb
->s_blocksize
- index
);
2421 accum
+= bitmap_weight((const unsigned long *)(ptr
+ index
),
2426 newblock
= udf_get_lb_pblock(sb
, &loc
, ++block
);
2427 bh
= udf_tread(sb
, newblock
);
2429 udf_debug("read failed\n");
2433 ptr
= (uint8_t *)bh
->b_data
;
2441 static unsigned int udf_count_free_table(struct super_block
*sb
,
2442 struct inode
*table
)
2444 unsigned int accum
= 0;
2446 struct kernel_lb_addr eloc
;
2448 struct extent_position epos
;
2450 mutex_lock(&UDF_SB(sb
)->s_alloc_mutex
);
2451 epos
.block
= UDF_I(table
)->i_location
;
2452 epos
.offset
= sizeof(struct unallocSpaceEntry
);
2455 while ((etype
= udf_next_aext(table
, &epos
, &eloc
, &elen
, 1)) != -1)
2456 accum
+= (elen
>> table
->i_sb
->s_blocksize_bits
);
2459 mutex_unlock(&UDF_SB(sb
)->s_alloc_mutex
);
2464 static unsigned int udf_count_free(struct super_block
*sb
)
2466 unsigned int accum
= 0;
2467 struct udf_sb_info
*sbi
;
2468 struct udf_part_map
*map
;
2471 if (sbi
->s_lvid_bh
) {
2472 struct logicalVolIntegrityDesc
*lvid
=
2473 (struct logicalVolIntegrityDesc
*)
2474 sbi
->s_lvid_bh
->b_data
;
2475 if (le32_to_cpu(lvid
->numOfPartitions
) > sbi
->s_partition
) {
2476 accum
= le32_to_cpu(
2477 lvid
->freeSpaceTable
[sbi
->s_partition
]);
2478 if (accum
== 0xFFFFFFFF)
2486 map
= &sbi
->s_partmaps
[sbi
->s_partition
];
2487 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
) {
2488 accum
+= udf_count_free_bitmap(sb
,
2489 map
->s_uspace
.s_bitmap
);
2491 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
) {
2492 accum
+= udf_count_free_bitmap(sb
,
2493 map
->s_fspace
.s_bitmap
);
2498 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
) {
2499 accum
+= udf_count_free_table(sb
,
2500 map
->s_uspace
.s_table
);
2502 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
) {
2503 accum
+= udf_count_free_table(sb
,
2504 map
->s_fspace
.s_table
);
2510 MODULE_AUTHOR("Ben Fennema");
2511 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2512 MODULE_LICENSE("GPL");
2513 module_init(init_udf_fs
)
2514 module_exit(exit_udf_fs
)