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 UDF_DEFAULT_BLOCKSIZE 2048
78 #define VSD_FIRST_SECTOR_OFFSET 32768
79 #define VSD_MAX_SECTOR_OFFSET 0x800000
82 * Maximum number of Terminating Descriptor / Logical Volume Integrity
83 * Descriptor redirections. The chosen numbers are arbitrary - just that we
84 * hopefully don't limit any real use of rewritten inode on write-once media
85 * but avoid looping for too long on corrupted media.
87 #define UDF_MAX_TD_NESTING 64
88 #define UDF_MAX_LVID_NESTING 1000
90 enum { UDF_MAX_LINKS
= 0xffff };
92 /* These are the "meat" - everything else is stuffing */
93 static int udf_fill_super(struct super_block
*, void *, int);
94 static void udf_put_super(struct super_block
*);
95 static int udf_sync_fs(struct super_block
*, int);
96 static int udf_remount_fs(struct super_block
*, int *, char *);
97 static void udf_load_logicalvolint(struct super_block
*, struct kernel_extent_ad
);
98 static int udf_find_fileset(struct super_block
*, struct kernel_lb_addr
*,
99 struct kernel_lb_addr
*);
100 static void udf_load_fileset(struct super_block
*, struct buffer_head
*,
101 struct kernel_lb_addr
*);
102 static void udf_open_lvid(struct super_block
*);
103 static void udf_close_lvid(struct super_block
*);
104 static unsigned int udf_count_free(struct super_block
*);
105 static int udf_statfs(struct dentry
*, struct kstatfs
*);
106 static int udf_show_options(struct seq_file
*, struct dentry
*);
108 struct logicalVolIntegrityDescImpUse
*udf_sb_lvidiu(struct super_block
*sb
)
110 struct logicalVolIntegrityDesc
*lvid
;
111 unsigned int partnum
;
114 if (!UDF_SB(sb
)->s_lvid_bh
)
116 lvid
= (struct logicalVolIntegrityDesc
*)UDF_SB(sb
)->s_lvid_bh
->b_data
;
117 partnum
= le32_to_cpu(lvid
->numOfPartitions
);
118 if ((sb
->s_blocksize
- sizeof(struct logicalVolIntegrityDescImpUse
) -
119 offsetof(struct logicalVolIntegrityDesc
, impUse
)) /
120 (2 * sizeof(uint32_t)) < partnum
) {
121 udf_err(sb
, "Logical volume integrity descriptor corrupted "
122 "(numOfPartitions = %u)!\n", partnum
);
125 /* The offset is to skip freeSpaceTable and sizeTable arrays */
126 offset
= partnum
* 2 * sizeof(uint32_t);
127 return (struct logicalVolIntegrityDescImpUse
*)&(lvid
->impUse
[offset
]);
130 /* UDF filesystem type */
131 static struct dentry
*udf_mount(struct file_system_type
*fs_type
,
132 int flags
, const char *dev_name
, void *data
)
134 return mount_bdev(fs_type
, flags
, dev_name
, data
, udf_fill_super
);
137 static struct file_system_type udf_fstype
= {
138 .owner
= THIS_MODULE
,
141 .kill_sb
= kill_block_super
,
142 .fs_flags
= FS_REQUIRES_DEV
,
144 MODULE_ALIAS_FS("udf");
146 static struct kmem_cache
*udf_inode_cachep
;
148 static struct inode
*udf_alloc_inode(struct super_block
*sb
)
150 struct udf_inode_info
*ei
;
151 ei
= kmem_cache_alloc(udf_inode_cachep
, GFP_KERNEL
);
156 ei
->i_lenExtents
= 0;
157 ei
->i_next_alloc_block
= 0;
158 ei
->i_next_alloc_goal
= 0;
160 init_rwsem(&ei
->i_data_sem
);
161 ei
->cached_extent
.lstart
= -1;
162 spin_lock_init(&ei
->i_extent_cache_lock
);
164 return &ei
->vfs_inode
;
167 static void udf_i_callback(struct rcu_head
*head
)
169 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
170 kmem_cache_free(udf_inode_cachep
, UDF_I(inode
));
173 static void udf_destroy_inode(struct inode
*inode
)
175 call_rcu(&inode
->i_rcu
, udf_i_callback
);
178 static void init_once(void *foo
)
180 struct udf_inode_info
*ei
= (struct udf_inode_info
*)foo
;
182 ei
->i_ext
.i_data
= NULL
;
183 inode_init_once(&ei
->vfs_inode
);
186 static int __init
init_inodecache(void)
188 udf_inode_cachep
= kmem_cache_create("udf_inode_cache",
189 sizeof(struct udf_inode_info
),
190 0, (SLAB_RECLAIM_ACCOUNT
|
194 if (!udf_inode_cachep
)
199 static void destroy_inodecache(void)
202 * Make sure all delayed rcu free inodes are flushed before we
206 kmem_cache_destroy(udf_inode_cachep
);
209 /* Superblock operations */
210 static const struct super_operations udf_sb_ops
= {
211 .alloc_inode
= udf_alloc_inode
,
212 .destroy_inode
= udf_destroy_inode
,
213 .write_inode
= udf_write_inode
,
214 .evict_inode
= udf_evict_inode
,
215 .put_super
= udf_put_super
,
216 .sync_fs
= udf_sync_fs
,
217 .statfs
= udf_statfs
,
218 .remount_fs
= udf_remount_fs
,
219 .show_options
= udf_show_options
,
224 unsigned int blocksize
;
225 unsigned int session
;
226 unsigned int lastblock
;
229 unsigned short partition
;
230 unsigned int fileset
;
231 unsigned int rootdir
;
238 struct nls_table
*nls_map
;
241 static int __init
init_udf_fs(void)
245 err
= init_inodecache();
248 err
= register_filesystem(&udf_fstype
);
255 destroy_inodecache();
261 static void __exit
exit_udf_fs(void)
263 unregister_filesystem(&udf_fstype
);
264 destroy_inodecache();
267 static int udf_sb_alloc_partition_maps(struct super_block
*sb
, u32 count
)
269 struct udf_sb_info
*sbi
= UDF_SB(sb
);
271 sbi
->s_partmaps
= kcalloc(count
, sizeof(struct udf_part_map
),
273 if (!sbi
->s_partmaps
) {
274 udf_err(sb
, "Unable to allocate space for %d partition maps\n",
276 sbi
->s_partitions
= 0;
280 sbi
->s_partitions
= count
;
284 static void udf_sb_free_bitmap(struct udf_bitmap
*bitmap
)
287 int nr_groups
= bitmap
->s_nr_groups
;
289 for (i
= 0; i
< nr_groups
; i
++)
290 if (bitmap
->s_block_bitmap
[i
])
291 brelse(bitmap
->s_block_bitmap
[i
]);
296 static void udf_free_partition(struct udf_part_map
*map
)
299 struct udf_meta_data
*mdata
;
301 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
)
302 iput(map
->s_uspace
.s_table
);
303 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
)
304 iput(map
->s_fspace
.s_table
);
305 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
)
306 udf_sb_free_bitmap(map
->s_uspace
.s_bitmap
);
307 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
)
308 udf_sb_free_bitmap(map
->s_fspace
.s_bitmap
);
309 if (map
->s_partition_type
== UDF_SPARABLE_MAP15
)
310 for (i
= 0; i
< 4; i
++)
311 brelse(map
->s_type_specific
.s_sparing
.s_spar_map
[i
]);
312 else if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
313 mdata
= &map
->s_type_specific
.s_metadata
;
314 iput(mdata
->s_metadata_fe
);
315 mdata
->s_metadata_fe
= NULL
;
317 iput(mdata
->s_mirror_fe
);
318 mdata
->s_mirror_fe
= NULL
;
320 iput(mdata
->s_bitmap_fe
);
321 mdata
->s_bitmap_fe
= NULL
;
325 static void udf_sb_free_partitions(struct super_block
*sb
)
327 struct udf_sb_info
*sbi
= UDF_SB(sb
);
329 if (sbi
->s_partmaps
== NULL
)
331 for (i
= 0; i
< sbi
->s_partitions
; i
++)
332 udf_free_partition(&sbi
->s_partmaps
[i
]);
333 kfree(sbi
->s_partmaps
);
334 sbi
->s_partmaps
= NULL
;
337 static int udf_show_options(struct seq_file
*seq
, struct dentry
*root
)
339 struct super_block
*sb
= root
->d_sb
;
340 struct udf_sb_info
*sbi
= UDF_SB(sb
);
342 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_STRICT
))
343 seq_puts(seq
, ",nostrict");
344 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_BLOCKSIZE_SET
))
345 seq_printf(seq
, ",bs=%lu", sb
->s_blocksize
);
346 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNHIDE
))
347 seq_puts(seq
, ",unhide");
348 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNDELETE
))
349 seq_puts(seq
, ",undelete");
350 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_AD_IN_ICB
))
351 seq_puts(seq
, ",noadinicb");
352 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_SHORT_AD
))
353 seq_puts(seq
, ",shortad");
354 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_FORGET
))
355 seq_puts(seq
, ",uid=forget");
356 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_IGNORE
))
357 seq_puts(seq
, ",uid=ignore");
358 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_FORGET
))
359 seq_puts(seq
, ",gid=forget");
360 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_IGNORE
))
361 seq_puts(seq
, ",gid=ignore");
362 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_SET
))
363 seq_printf(seq
, ",uid=%u", from_kuid(&init_user_ns
, sbi
->s_uid
));
364 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_SET
))
365 seq_printf(seq
, ",gid=%u", from_kgid(&init_user_ns
, sbi
->s_gid
));
366 if (sbi
->s_umask
!= 0)
367 seq_printf(seq
, ",umask=%ho", sbi
->s_umask
);
368 if (sbi
->s_fmode
!= UDF_INVALID_MODE
)
369 seq_printf(seq
, ",mode=%ho", sbi
->s_fmode
);
370 if (sbi
->s_dmode
!= UDF_INVALID_MODE
)
371 seq_printf(seq
, ",dmode=%ho", sbi
->s_dmode
);
372 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_SESSION_SET
))
373 seq_printf(seq
, ",session=%u", sbi
->s_session
);
374 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_LASTBLOCK_SET
))
375 seq_printf(seq
, ",lastblock=%u", sbi
->s_last_block
);
376 if (sbi
->s_anchor
!= 0)
377 seq_printf(seq
, ",anchor=%u", sbi
->s_anchor
);
379 * volume, partition, fileset and rootdir seem to be ignored
382 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UTF8
))
383 seq_puts(seq
, ",utf8");
384 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
) && sbi
->s_nls_map
)
385 seq_printf(seq
, ",iocharset=%s", sbi
->s_nls_map
->charset
);
394 * Parse mount options.
397 * The following mount options are supported:
399 * gid= Set the default group.
400 * umask= Set the default umask.
401 * mode= Set the default file permissions.
402 * dmode= Set the default directory permissions.
403 * uid= Set the default user.
404 * bs= Set the block size.
405 * unhide Show otherwise hidden files.
406 * undelete Show deleted files in lists.
407 * adinicb Embed data in the inode (default)
408 * noadinicb Don't embed data in the inode
409 * shortad Use short ad's
410 * longad Use long ad's (default)
411 * nostrict Unset strict conformance
412 * iocharset= Set the NLS character set
414 * The remaining are for debugging and disaster recovery:
416 * novrs Skip volume sequence recognition
418 * The following expect a offset from 0.
420 * session= Set the CDROM session (default= last session)
421 * anchor= Override standard anchor location. (default= 256)
422 * volume= Override the VolumeDesc location. (unused)
423 * partition= Override the PartitionDesc location. (unused)
424 * lastblock= Set the last block of the filesystem/
426 * The following expect a offset from the partition root.
428 * fileset= Override the fileset block location. (unused)
429 * rootdir= Override the root directory location. (unused)
430 * WARNING: overriding the rootdir to a non-directory may
431 * yield highly unpredictable results.
434 * options Pointer to mount options string.
435 * uopts Pointer to mount options variable.
438 * <return> 1 Mount options parsed okay.
439 * <return> 0 Error parsing mount options.
442 * July 1, 1997 - Andrew E. Mileski
443 * Written, tested, and released.
447 Opt_novrs
, Opt_nostrict
, Opt_bs
, Opt_unhide
, Opt_undelete
,
448 Opt_noadinicb
, Opt_adinicb
, Opt_shortad
, Opt_longad
,
449 Opt_gid
, Opt_uid
, Opt_umask
, Opt_session
, Opt_lastblock
,
450 Opt_anchor
, Opt_volume
, Opt_partition
, Opt_fileset
,
451 Opt_rootdir
, Opt_utf8
, Opt_iocharset
,
452 Opt_err
, Opt_uforget
, Opt_uignore
, Opt_gforget
, Opt_gignore
,
456 static const match_table_t tokens
= {
457 {Opt_novrs
, "novrs"},
458 {Opt_nostrict
, "nostrict"},
460 {Opt_unhide
, "unhide"},
461 {Opt_undelete
, "undelete"},
462 {Opt_noadinicb
, "noadinicb"},
463 {Opt_adinicb
, "adinicb"},
464 {Opt_shortad
, "shortad"},
465 {Opt_longad
, "longad"},
466 {Opt_uforget
, "uid=forget"},
467 {Opt_uignore
, "uid=ignore"},
468 {Opt_gforget
, "gid=forget"},
469 {Opt_gignore
, "gid=ignore"},
472 {Opt_umask
, "umask=%o"},
473 {Opt_session
, "session=%u"},
474 {Opt_lastblock
, "lastblock=%u"},
475 {Opt_anchor
, "anchor=%u"},
476 {Opt_volume
, "volume=%u"},
477 {Opt_partition
, "partition=%u"},
478 {Opt_fileset
, "fileset=%u"},
479 {Opt_rootdir
, "rootdir=%u"},
481 {Opt_iocharset
, "iocharset=%s"},
482 {Opt_fmode
, "mode=%o"},
483 {Opt_dmode
, "dmode=%o"},
487 static int udf_parse_options(char *options
, struct udf_options
*uopt
,
494 uopt
->partition
= 0xFFFF;
495 uopt
->session
= 0xFFFFFFFF;
498 uopt
->volume
= 0xFFFFFFFF;
499 uopt
->rootdir
= 0xFFFFFFFF;
500 uopt
->fileset
= 0xFFFFFFFF;
501 uopt
->nls_map
= NULL
;
506 while ((p
= strsep(&options
, ",")) != NULL
) {
507 substring_t args
[MAX_OPT_ARGS
];
513 token
= match_token(p
, tokens
, args
);
519 if (match_int(&args
[0], &option
))
522 if (n
!= 512 && n
!= 1024 && n
!= 2048 && n
!= 4096)
525 uopt
->flags
|= (1 << UDF_FLAG_BLOCKSIZE_SET
);
528 uopt
->flags
|= (1 << UDF_FLAG_UNHIDE
);
531 uopt
->flags
|= (1 << UDF_FLAG_UNDELETE
);
534 uopt
->flags
&= ~(1 << UDF_FLAG_USE_AD_IN_ICB
);
537 uopt
->flags
|= (1 << UDF_FLAG_USE_AD_IN_ICB
);
540 uopt
->flags
|= (1 << UDF_FLAG_USE_SHORT_AD
);
543 uopt
->flags
&= ~(1 << UDF_FLAG_USE_SHORT_AD
);
546 if (match_int(args
, &option
))
548 uopt
->gid
= make_kgid(current_user_ns(), option
);
549 if (!gid_valid(uopt
->gid
))
551 uopt
->flags
|= (1 << UDF_FLAG_GID_SET
);
554 if (match_int(args
, &option
))
556 uopt
->uid
= make_kuid(current_user_ns(), option
);
557 if (!uid_valid(uopt
->uid
))
559 uopt
->flags
|= (1 << UDF_FLAG_UID_SET
);
562 if (match_octal(args
, &option
))
564 uopt
->umask
= option
;
567 uopt
->flags
&= ~(1 << UDF_FLAG_STRICT
);
570 if (match_int(args
, &option
))
572 uopt
->session
= option
;
574 uopt
->flags
|= (1 << UDF_FLAG_SESSION_SET
);
577 if (match_int(args
, &option
))
579 uopt
->lastblock
= option
;
581 uopt
->flags
|= (1 << UDF_FLAG_LASTBLOCK_SET
);
584 if (match_int(args
, &option
))
586 uopt
->anchor
= option
;
589 if (match_int(args
, &option
))
591 uopt
->volume
= option
;
594 if (match_int(args
, &option
))
596 uopt
->partition
= option
;
599 if (match_int(args
, &option
))
601 uopt
->fileset
= option
;
604 if (match_int(args
, &option
))
606 uopt
->rootdir
= option
;
609 uopt
->flags
|= (1 << UDF_FLAG_UTF8
);
611 #ifdef CONFIG_UDF_NLS
613 uopt
->nls_map
= load_nls(args
[0].from
);
614 uopt
->flags
|= (1 << UDF_FLAG_NLS_MAP
);
618 uopt
->flags
|= (1 << UDF_FLAG_UID_IGNORE
);
621 uopt
->flags
|= (1 << UDF_FLAG_UID_FORGET
);
624 uopt
->flags
|= (1 << UDF_FLAG_GID_IGNORE
);
627 uopt
->flags
|= (1 << UDF_FLAG_GID_FORGET
);
630 if (match_octal(args
, &option
))
632 uopt
->fmode
= option
& 0777;
635 if (match_octal(args
, &option
))
637 uopt
->dmode
= option
& 0777;
640 pr_err("bad mount option \"%s\" or missing value\n", p
);
647 static int udf_remount_fs(struct super_block
*sb
, int *flags
, char *options
)
649 struct udf_options uopt
;
650 struct udf_sb_info
*sbi
= UDF_SB(sb
);
652 struct logicalVolIntegrityDescImpUse
*lvidiu
= udf_sb_lvidiu(sb
);
656 int write_rev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
657 if (write_rev
> UDF_MAX_WRITE_VERSION
&& !(*flags
& MS_RDONLY
))
661 uopt
.flags
= sbi
->s_flags
;
662 uopt
.uid
= sbi
->s_uid
;
663 uopt
.gid
= sbi
->s_gid
;
664 uopt
.umask
= sbi
->s_umask
;
665 uopt
.fmode
= sbi
->s_fmode
;
666 uopt
.dmode
= sbi
->s_dmode
;
668 if (!udf_parse_options(options
, &uopt
, true))
671 write_lock(&sbi
->s_cred_lock
);
672 sbi
->s_flags
= uopt
.flags
;
673 sbi
->s_uid
= uopt
.uid
;
674 sbi
->s_gid
= uopt
.gid
;
675 sbi
->s_umask
= uopt
.umask
;
676 sbi
->s_fmode
= uopt
.fmode
;
677 sbi
->s_dmode
= uopt
.dmode
;
678 write_unlock(&sbi
->s_cred_lock
);
680 if ((*flags
& MS_RDONLY
) == (sb
->s_flags
& MS_RDONLY
))
683 if (*flags
& MS_RDONLY
)
692 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
693 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
694 static loff_t
udf_check_vsd(struct super_block
*sb
)
696 struct volStructDesc
*vsd
= NULL
;
697 loff_t sector
= VSD_FIRST_SECTOR_OFFSET
;
699 struct buffer_head
*bh
= NULL
;
702 struct udf_sb_info
*sbi
;
705 if (sb
->s_blocksize
< sizeof(struct volStructDesc
))
706 sectorsize
= sizeof(struct volStructDesc
);
708 sectorsize
= sb
->s_blocksize
;
710 sector
+= (sbi
->s_session
<< sb
->s_blocksize_bits
);
712 udf_debug("Starting at sector %u (%ld byte sectors)\n",
713 (unsigned int)(sector
>> sb
->s_blocksize_bits
),
715 /* Process the sequence (if applicable). The hard limit on the sector
716 * offset is arbitrary, hopefully large enough so that all valid UDF
717 * filesystems will be recognised. There is no mention of an upper
718 * bound to the size of the volume recognition area in the standard.
719 * The limit will prevent the code to read all the sectors of a
720 * specially crafted image (like a bluray disc full of CD001 sectors),
721 * potentially causing minutes or even hours of uninterruptible I/O
722 * activity. This actually happened with uninitialised SSD partitions
723 * (all 0xFF) before the check for the limit and all valid IDs were
725 for (; !nsr02
&& !nsr03
&& sector
< VSD_MAX_SECTOR_OFFSET
;
726 sector
+= sectorsize
) {
728 bh
= udf_tread(sb
, sector
>> sb
->s_blocksize_bits
);
732 /* Look for ISO descriptors */
733 vsd
= (struct volStructDesc
*)(bh
->b_data
+
734 (sector
& (sb
->s_blocksize
- 1)));
736 if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CD001
,
738 switch (vsd
->structType
) {
740 udf_debug("ISO9660 Boot Record found\n");
743 udf_debug("ISO9660 Primary Volume Descriptor found\n");
746 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
749 udf_debug("ISO9660 Volume Partition Descriptor found\n");
752 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
755 udf_debug("ISO9660 VRS (%u) found\n",
759 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BEA01
,
762 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_TEA01
,
766 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR02
,
769 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR03
,
772 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BOOT2
,
775 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CDW02
,
779 /* invalid id : end of volume recognition area */
790 else if (!bh
&& sector
- (sbi
->s_session
<< sb
->s_blocksize_bits
) ==
791 VSD_FIRST_SECTOR_OFFSET
)
797 static int udf_find_fileset(struct super_block
*sb
,
798 struct kernel_lb_addr
*fileset
,
799 struct kernel_lb_addr
*root
)
801 struct buffer_head
*bh
= NULL
;
804 struct udf_sb_info
*sbi
;
806 if (fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
807 fileset
->partitionReferenceNum
!= 0xFFFF) {
808 bh
= udf_read_ptagged(sb
, fileset
, 0, &ident
);
812 } else if (ident
!= TAG_IDENT_FSD
) {
821 /* Search backwards through the partitions */
822 struct kernel_lb_addr newfileset
;
824 /* --> cvg: FIXME - is it reasonable? */
827 for (newfileset
.partitionReferenceNum
= sbi
->s_partitions
- 1;
828 (newfileset
.partitionReferenceNum
!= 0xFFFF &&
829 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
830 fileset
->partitionReferenceNum
== 0xFFFF);
831 newfileset
.partitionReferenceNum
--) {
832 lastblock
= sbi
->s_partmaps
833 [newfileset
.partitionReferenceNum
]
835 newfileset
.logicalBlockNum
= 0;
838 bh
= udf_read_ptagged(sb
, &newfileset
, 0,
841 newfileset
.logicalBlockNum
++;
848 struct spaceBitmapDesc
*sp
;
849 sp
= (struct spaceBitmapDesc
*)
851 newfileset
.logicalBlockNum
+= 1 +
852 ((le32_to_cpu(sp
->numOfBytes
) +
853 sizeof(struct spaceBitmapDesc
)
854 - 1) >> sb
->s_blocksize_bits
);
859 *fileset
= newfileset
;
862 newfileset
.logicalBlockNum
++;
867 } while (newfileset
.logicalBlockNum
< lastblock
&&
868 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
869 fileset
->partitionReferenceNum
== 0xFFFF);
873 if ((fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
874 fileset
->partitionReferenceNum
!= 0xFFFF) && bh
) {
875 udf_debug("Fileset at block=%d, partition=%d\n",
876 fileset
->logicalBlockNum
,
877 fileset
->partitionReferenceNum
);
879 sbi
->s_partition
= fileset
->partitionReferenceNum
;
880 udf_load_fileset(sb
, bh
, root
);
888 * Load primary Volume Descriptor Sequence
890 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
893 static int udf_load_pvoldesc(struct super_block
*sb
, sector_t block
)
895 struct primaryVolDesc
*pvoldesc
;
897 struct buffer_head
*bh
;
901 outstr
= kmalloc(128, GFP_NOFS
);
905 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
911 if (ident
!= TAG_IDENT_PVD
) {
916 pvoldesc
= (struct primaryVolDesc
*)bh
->b_data
;
918 if (udf_disk_stamp_to_time(&UDF_SB(sb
)->s_record_time
,
919 pvoldesc
->recordingDateAndTime
)) {
921 struct timestamp
*ts
= &pvoldesc
->recordingDateAndTime
;
922 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
923 le16_to_cpu(ts
->year
), ts
->month
, ts
->day
, ts
->hour
,
924 ts
->minute
, le16_to_cpu(ts
->typeAndTimezone
));
928 ret
= udf_dstrCS0toUTF8(outstr
, 31, pvoldesc
->volIdent
, 32);
932 strncpy(UDF_SB(sb
)->s_volume_ident
, outstr
, ret
);
933 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb
)->s_volume_ident
);
935 ret
= udf_dstrCS0toUTF8(outstr
, 127, pvoldesc
->volSetIdent
, 128);
940 udf_debug("volSetIdent[] = '%s'\n", outstr
);
950 struct inode
*udf_find_metadata_inode_efe(struct super_block
*sb
,
951 u32 meta_file_loc
, u32 partition_ref
)
953 struct kernel_lb_addr addr
;
954 struct inode
*metadata_fe
;
956 addr
.logicalBlockNum
= meta_file_loc
;
957 addr
.partitionReferenceNum
= partition_ref
;
959 metadata_fe
= udf_iget_special(sb
, &addr
);
961 if (IS_ERR(metadata_fe
)) {
962 udf_warn(sb
, "metadata inode efe not found\n");
965 if (UDF_I(metadata_fe
)->i_alloc_type
!= ICBTAG_FLAG_AD_SHORT
) {
966 udf_warn(sb
, "metadata inode efe does not have short allocation descriptors!\n");
968 return ERR_PTR(-EIO
);
974 static int udf_load_metadata_files(struct super_block
*sb
, int partition
,
977 struct udf_sb_info
*sbi
= UDF_SB(sb
);
978 struct udf_part_map
*map
;
979 struct udf_meta_data
*mdata
;
980 struct kernel_lb_addr addr
;
983 map
= &sbi
->s_partmaps
[partition
];
984 mdata
= &map
->s_type_specific
.s_metadata
;
985 mdata
->s_phys_partition_ref
= type1_index
;
987 /* metadata address */
988 udf_debug("Metadata file location: block = %d part = %d\n",
989 mdata
->s_meta_file_loc
, mdata
->s_phys_partition_ref
);
991 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_meta_file_loc
,
992 mdata
->s_phys_partition_ref
);
994 /* mirror file entry */
995 udf_debug("Mirror metadata file location: block = %d part = %d\n",
996 mdata
->s_mirror_file_loc
, mdata
->s_phys_partition_ref
);
998 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_mirror_file_loc
,
999 mdata
->s_phys_partition_ref
);
1002 udf_err(sb
, "Both metadata and mirror metadata inode efe can not found\n");
1005 mdata
->s_mirror_fe
= fe
;
1007 mdata
->s_metadata_fe
= fe
;
1013 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1015 if (mdata
->s_bitmap_file_loc
!= 0xFFFFFFFF) {
1016 addr
.logicalBlockNum
= mdata
->s_bitmap_file_loc
;
1017 addr
.partitionReferenceNum
= mdata
->s_phys_partition_ref
;
1019 udf_debug("Bitmap file location: block = %d part = %d\n",
1020 addr
.logicalBlockNum
, addr
.partitionReferenceNum
);
1022 fe
= udf_iget_special(sb
, &addr
);
1024 if (sb
->s_flags
& MS_RDONLY
)
1025 udf_warn(sb
, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1027 udf_err(sb
, "bitmap inode efe not found and attempted read-write mount\n");
1031 mdata
->s_bitmap_fe
= fe
;
1034 udf_debug("udf_load_metadata_files Ok\n");
1038 static void udf_load_fileset(struct super_block
*sb
, struct buffer_head
*bh
,
1039 struct kernel_lb_addr
*root
)
1041 struct fileSetDesc
*fset
;
1043 fset
= (struct fileSetDesc
*)bh
->b_data
;
1045 *root
= lelb_to_cpu(fset
->rootDirectoryICB
.extLocation
);
1047 UDF_SB(sb
)->s_serial_number
= le16_to_cpu(fset
->descTag
.tagSerialNum
);
1049 udf_debug("Rootdir at block=%d, partition=%d\n",
1050 root
->logicalBlockNum
, root
->partitionReferenceNum
);
1053 int udf_compute_nr_groups(struct super_block
*sb
, u32 partition
)
1055 struct udf_part_map
*map
= &UDF_SB(sb
)->s_partmaps
[partition
];
1056 return DIV_ROUND_UP(map
->s_partition_len
+
1057 (sizeof(struct spaceBitmapDesc
) << 3),
1058 sb
->s_blocksize
* 8);
1061 static struct udf_bitmap
*udf_sb_alloc_bitmap(struct super_block
*sb
, u32 index
)
1063 struct udf_bitmap
*bitmap
;
1067 nr_groups
= udf_compute_nr_groups(sb
, index
);
1068 size
= sizeof(struct udf_bitmap
) +
1069 (sizeof(struct buffer_head
*) * nr_groups
);
1071 if (size
<= PAGE_SIZE
)
1072 bitmap
= kzalloc(size
, GFP_KERNEL
);
1074 bitmap
= vzalloc(size
); /* TODO: get rid of vzalloc */
1079 bitmap
->s_nr_groups
= nr_groups
;
1083 static int udf_fill_partdesc_info(struct super_block
*sb
,
1084 struct partitionDesc
*p
, int p_index
)
1086 struct udf_part_map
*map
;
1087 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1088 struct partitionHeaderDesc
*phd
;
1090 map
= &sbi
->s_partmaps
[p_index
];
1092 map
->s_partition_len
= le32_to_cpu(p
->partitionLength
); /* blocks */
1093 map
->s_partition_root
= le32_to_cpu(p
->partitionStartingLocation
);
1095 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY
))
1096 map
->s_partition_flags
|= UDF_PART_FLAG_READ_ONLY
;
1097 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE
))
1098 map
->s_partition_flags
|= UDF_PART_FLAG_WRITE_ONCE
;
1099 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE
))
1100 map
->s_partition_flags
|= UDF_PART_FLAG_REWRITABLE
;
1101 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE
))
1102 map
->s_partition_flags
|= UDF_PART_FLAG_OVERWRITABLE
;
1104 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1105 p_index
, map
->s_partition_type
,
1106 map
->s_partition_root
, map
->s_partition_len
);
1108 if (strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR02
) &&
1109 strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR03
))
1112 phd
= (struct partitionHeaderDesc
*)p
->partitionContentsUse
;
1113 if (phd
->unallocSpaceTable
.extLength
) {
1114 struct kernel_lb_addr loc
= {
1115 .logicalBlockNum
= le32_to_cpu(
1116 phd
->unallocSpaceTable
.extPosition
),
1117 .partitionReferenceNum
= p_index
,
1119 struct inode
*inode
;
1121 inode
= udf_iget_special(sb
, &loc
);
1122 if (IS_ERR(inode
)) {
1123 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1125 return PTR_ERR(inode
);
1127 map
->s_uspace
.s_table
= inode
;
1128 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_TABLE
;
1129 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1130 p_index
, map
->s_uspace
.s_table
->i_ino
);
1133 if (phd
->unallocSpaceBitmap
.extLength
) {
1134 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1137 map
->s_uspace
.s_bitmap
= bitmap
;
1138 bitmap
->s_extPosition
= le32_to_cpu(
1139 phd
->unallocSpaceBitmap
.extPosition
);
1140 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_BITMAP
;
1141 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1142 p_index
, bitmap
->s_extPosition
);
1145 if (phd
->partitionIntegrityTable
.extLength
)
1146 udf_debug("partitionIntegrityTable (part %d)\n", p_index
);
1148 if (phd
->freedSpaceTable
.extLength
) {
1149 struct kernel_lb_addr loc
= {
1150 .logicalBlockNum
= le32_to_cpu(
1151 phd
->freedSpaceTable
.extPosition
),
1152 .partitionReferenceNum
= p_index
,
1154 struct inode
*inode
;
1156 inode
= udf_iget_special(sb
, &loc
);
1157 if (IS_ERR(inode
)) {
1158 udf_debug("cannot load freedSpaceTable (part %d)\n",
1160 return PTR_ERR(inode
);
1162 map
->s_fspace
.s_table
= inode
;
1163 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_TABLE
;
1164 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1165 p_index
, map
->s_fspace
.s_table
->i_ino
);
1168 if (phd
->freedSpaceBitmap
.extLength
) {
1169 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1172 map
->s_fspace
.s_bitmap
= bitmap
;
1173 bitmap
->s_extPosition
= le32_to_cpu(
1174 phd
->freedSpaceBitmap
.extPosition
);
1175 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_BITMAP
;
1176 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1177 p_index
, bitmap
->s_extPosition
);
1182 static void udf_find_vat_block(struct super_block
*sb
, int p_index
,
1183 int type1_index
, sector_t start_block
)
1185 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1186 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1188 struct kernel_lb_addr ino
;
1189 struct inode
*inode
;
1192 * VAT file entry is in the last recorded block. Some broken disks have
1193 * it a few blocks before so try a bit harder...
1195 ino
.partitionReferenceNum
= type1_index
;
1196 for (vat_block
= start_block
;
1197 vat_block
>= map
->s_partition_root
&&
1198 vat_block
>= start_block
- 3; vat_block
--) {
1199 ino
.logicalBlockNum
= vat_block
- map
->s_partition_root
;
1200 inode
= udf_iget_special(sb
, &ino
);
1201 if (!IS_ERR(inode
)) {
1202 sbi
->s_vat_inode
= inode
;
1208 static int udf_load_vat(struct super_block
*sb
, int p_index
, int type1_index
)
1210 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1211 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1212 struct buffer_head
*bh
= NULL
;
1213 struct udf_inode_info
*vati
;
1215 struct virtualAllocationTable20
*vat20
;
1216 sector_t blocks
= sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
;
1218 udf_find_vat_block(sb
, p_index
, type1_index
, sbi
->s_last_block
);
1219 if (!sbi
->s_vat_inode
&&
1220 sbi
->s_last_block
!= blocks
- 1) {
1221 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1222 (unsigned long)sbi
->s_last_block
,
1223 (unsigned long)blocks
- 1);
1224 udf_find_vat_block(sb
, p_index
, type1_index
, blocks
- 1);
1226 if (!sbi
->s_vat_inode
)
1229 if (map
->s_partition_type
== UDF_VIRTUAL_MAP15
) {
1230 map
->s_type_specific
.s_virtual
.s_start_offset
= 0;
1231 map
->s_type_specific
.s_virtual
.s_num_entries
=
1232 (sbi
->s_vat_inode
->i_size
- 36) >> 2;
1233 } else if (map
->s_partition_type
== UDF_VIRTUAL_MAP20
) {
1234 vati
= UDF_I(sbi
->s_vat_inode
);
1235 if (vati
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
1236 pos
= udf_block_map(sbi
->s_vat_inode
, 0);
1237 bh
= sb_bread(sb
, pos
);
1240 vat20
= (struct virtualAllocationTable20
*)bh
->b_data
;
1242 vat20
= (struct virtualAllocationTable20
*)
1246 map
->s_type_specific
.s_virtual
.s_start_offset
=
1247 le16_to_cpu(vat20
->lengthHeader
);
1248 map
->s_type_specific
.s_virtual
.s_num_entries
=
1249 (sbi
->s_vat_inode
->i_size
-
1250 map
->s_type_specific
.s_virtual
.
1251 s_start_offset
) >> 2;
1258 * Load partition descriptor block
1260 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1263 static int udf_load_partdesc(struct super_block
*sb
, sector_t block
)
1265 struct buffer_head
*bh
;
1266 struct partitionDesc
*p
;
1267 struct udf_part_map
*map
;
1268 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1270 uint16_t partitionNumber
;
1274 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1277 if (ident
!= TAG_IDENT_PD
) {
1282 p
= (struct partitionDesc
*)bh
->b_data
;
1283 partitionNumber
= le16_to_cpu(p
->partitionNumber
);
1285 /* First scan for TYPE1 and SPARABLE partitions */
1286 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1287 map
= &sbi
->s_partmaps
[i
];
1288 udf_debug("Searching map: (%d == %d)\n",
1289 map
->s_partition_num
, partitionNumber
);
1290 if (map
->s_partition_num
== partitionNumber
&&
1291 (map
->s_partition_type
== UDF_TYPE1_MAP15
||
1292 map
->s_partition_type
== UDF_SPARABLE_MAP15
))
1296 if (i
>= sbi
->s_partitions
) {
1297 udf_debug("Partition (%d) not found in partition map\n",
1303 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1308 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1309 * PHYSICAL partitions are already set up
1313 map
= NULL
; /* supress 'maybe used uninitialized' warning */
1315 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1316 map
= &sbi
->s_partmaps
[i
];
1318 if (map
->s_partition_num
== partitionNumber
&&
1319 (map
->s_partition_type
== UDF_VIRTUAL_MAP15
||
1320 map
->s_partition_type
== UDF_VIRTUAL_MAP20
||
1321 map
->s_partition_type
== UDF_METADATA_MAP25
))
1325 if (i
>= sbi
->s_partitions
) {
1330 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1334 if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
1335 ret
= udf_load_metadata_files(sb
, i
, type1_idx
);
1337 udf_err(sb
, "error loading MetaData partition map %d\n",
1343 * If we have a partition with virtual map, we don't handle
1344 * writing to it (we overwrite blocks instead of relocating
1347 if (!(sb
->s_flags
& MS_RDONLY
)) {
1351 ret
= udf_load_vat(sb
, i
, type1_idx
);
1357 /* In case loading failed, we handle cleanup in udf_fill_super */
1362 static int udf_load_sparable_map(struct super_block
*sb
,
1363 struct udf_part_map
*map
,
1364 struct sparablePartitionMap
*spm
)
1368 struct sparingTable
*st
;
1369 struct udf_sparing_data
*sdata
= &map
->s_type_specific
.s_sparing
;
1371 struct buffer_head
*bh
;
1373 map
->s_partition_type
= UDF_SPARABLE_MAP15
;
1374 sdata
->s_packet_len
= le16_to_cpu(spm
->packetLength
);
1375 if (!is_power_of_2(sdata
->s_packet_len
)) {
1376 udf_err(sb
, "error loading logical volume descriptor: "
1377 "Invalid packet length %u\n",
1378 (unsigned)sdata
->s_packet_len
);
1381 if (spm
->numSparingTables
> 4) {
1382 udf_err(sb
, "error loading logical volume descriptor: "
1383 "Too many sparing tables (%d)\n",
1384 (int)spm
->numSparingTables
);
1388 for (i
= 0; i
< spm
->numSparingTables
; i
++) {
1389 loc
= le32_to_cpu(spm
->locSparingTable
[i
]);
1390 bh
= udf_read_tagged(sb
, loc
, loc
, &ident
);
1394 st
= (struct sparingTable
*)bh
->b_data
;
1396 strncmp(st
->sparingIdent
.ident
, UDF_ID_SPARING
,
1397 strlen(UDF_ID_SPARING
)) ||
1398 sizeof(*st
) + le16_to_cpu(st
->reallocationTableLen
) >
1404 sdata
->s_spar_map
[i
] = bh
;
1406 map
->s_partition_func
= udf_get_pblock_spar15
;
1410 static int udf_load_logicalvol(struct super_block
*sb
, sector_t block
,
1411 struct kernel_lb_addr
*fileset
)
1413 struct logicalVolDesc
*lvd
;
1416 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1417 struct genericPartitionMap
*gpm
;
1419 struct buffer_head
*bh
;
1420 unsigned int table_len
;
1423 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1426 BUG_ON(ident
!= TAG_IDENT_LVD
);
1427 lvd
= (struct logicalVolDesc
*)bh
->b_data
;
1428 table_len
= le32_to_cpu(lvd
->mapTableLength
);
1429 if (table_len
> sb
->s_blocksize
- sizeof(*lvd
)) {
1430 udf_err(sb
, "error loading logical volume descriptor: "
1431 "Partition table too long (%u > %lu)\n", table_len
,
1432 sb
->s_blocksize
- sizeof(*lvd
));
1437 ret
= udf_sb_alloc_partition_maps(sb
, le32_to_cpu(lvd
->numPartitionMaps
));
1441 for (i
= 0, offset
= 0;
1442 i
< sbi
->s_partitions
&& offset
< table_len
;
1443 i
++, offset
+= gpm
->partitionMapLength
) {
1444 struct udf_part_map
*map
= &sbi
->s_partmaps
[i
];
1445 gpm
= (struct genericPartitionMap
*)
1446 &(lvd
->partitionMaps
[offset
]);
1447 type
= gpm
->partitionMapType
;
1449 struct genericPartitionMap1
*gpm1
=
1450 (struct genericPartitionMap1
*)gpm
;
1451 map
->s_partition_type
= UDF_TYPE1_MAP15
;
1452 map
->s_volumeseqnum
= le16_to_cpu(gpm1
->volSeqNum
);
1453 map
->s_partition_num
= le16_to_cpu(gpm1
->partitionNum
);
1454 map
->s_partition_func
= NULL
;
1455 } else if (type
== 2) {
1456 struct udfPartitionMap2
*upm2
=
1457 (struct udfPartitionMap2
*)gpm
;
1458 if (!strncmp(upm2
->partIdent
.ident
, UDF_ID_VIRTUAL
,
1459 strlen(UDF_ID_VIRTUAL
))) {
1461 le16_to_cpu(((__le16
*)upm2
->partIdent
.
1464 map
->s_partition_type
=
1466 map
->s_partition_func
=
1467 udf_get_pblock_virt15
;
1469 map
->s_partition_type
=
1471 map
->s_partition_func
=
1472 udf_get_pblock_virt20
;
1474 } else if (!strncmp(upm2
->partIdent
.ident
,
1476 strlen(UDF_ID_SPARABLE
))) {
1477 ret
= udf_load_sparable_map(sb
, map
,
1478 (struct sparablePartitionMap
*)gpm
);
1481 } else if (!strncmp(upm2
->partIdent
.ident
,
1483 strlen(UDF_ID_METADATA
))) {
1484 struct udf_meta_data
*mdata
=
1485 &map
->s_type_specific
.s_metadata
;
1486 struct metadataPartitionMap
*mdm
=
1487 (struct metadataPartitionMap
*)
1488 &(lvd
->partitionMaps
[offset
]);
1489 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1490 i
, type
, UDF_ID_METADATA
);
1492 map
->s_partition_type
= UDF_METADATA_MAP25
;
1493 map
->s_partition_func
= udf_get_pblock_meta25
;
1495 mdata
->s_meta_file_loc
=
1496 le32_to_cpu(mdm
->metadataFileLoc
);
1497 mdata
->s_mirror_file_loc
=
1498 le32_to_cpu(mdm
->metadataMirrorFileLoc
);
1499 mdata
->s_bitmap_file_loc
=
1500 le32_to_cpu(mdm
->metadataBitmapFileLoc
);
1501 mdata
->s_alloc_unit_size
=
1502 le32_to_cpu(mdm
->allocUnitSize
);
1503 mdata
->s_align_unit_size
=
1504 le16_to_cpu(mdm
->alignUnitSize
);
1505 if (mdm
->flags
& 0x01)
1506 mdata
->s_flags
|= MF_DUPLICATE_MD
;
1508 udf_debug("Metadata Ident suffix=0x%x\n",
1509 le16_to_cpu(*(__le16
*)
1510 mdm
->partIdent
.identSuffix
));
1511 udf_debug("Metadata part num=%d\n",
1512 le16_to_cpu(mdm
->partitionNum
));
1513 udf_debug("Metadata part alloc unit size=%d\n",
1514 le32_to_cpu(mdm
->allocUnitSize
));
1515 udf_debug("Metadata file loc=%d\n",
1516 le32_to_cpu(mdm
->metadataFileLoc
));
1517 udf_debug("Mirror file loc=%d\n",
1518 le32_to_cpu(mdm
->metadataMirrorFileLoc
));
1519 udf_debug("Bitmap file loc=%d\n",
1520 le32_to_cpu(mdm
->metadataBitmapFileLoc
));
1521 udf_debug("Flags: %d %d\n",
1522 mdata
->s_flags
, mdm
->flags
);
1524 udf_debug("Unknown ident: %s\n",
1525 upm2
->partIdent
.ident
);
1528 map
->s_volumeseqnum
= le16_to_cpu(upm2
->volSeqNum
);
1529 map
->s_partition_num
= le16_to_cpu(upm2
->partitionNum
);
1531 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1532 i
, map
->s_partition_num
, type
, map
->s_volumeseqnum
);
1536 struct long_ad
*la
= (struct long_ad
*)&(lvd
->logicalVolContentsUse
[0]);
1538 *fileset
= lelb_to_cpu(la
->extLocation
);
1539 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1540 fileset
->logicalBlockNum
,
1541 fileset
->partitionReferenceNum
);
1543 if (lvd
->integritySeqExt
.extLength
)
1544 udf_load_logicalvolint(sb
, leea_to_cpu(lvd
->integritySeqExt
));
1552 * Find the prevailing Logical Volume Integrity Descriptor.
1554 static void udf_load_logicalvolint(struct super_block
*sb
, struct kernel_extent_ad loc
)
1556 struct buffer_head
*bh
, *final_bh
;
1558 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1559 struct logicalVolIntegrityDesc
*lvid
;
1560 int indirections
= 0;
1562 while (++indirections
<= UDF_MAX_LVID_NESTING
) {
1564 while (loc
.extLength
> 0 &&
1565 (bh
= udf_read_tagged(sb
, loc
.extLocation
,
1566 loc
.extLocation
, &ident
))) {
1567 if (ident
!= TAG_IDENT_LVID
) {
1575 loc
.extLength
-= sb
->s_blocksize
;
1582 brelse(sbi
->s_lvid_bh
);
1583 sbi
->s_lvid_bh
= final_bh
;
1585 lvid
= (struct logicalVolIntegrityDesc
*)final_bh
->b_data
;
1586 if (lvid
->nextIntegrityExt
.extLength
== 0)
1589 loc
= leea_to_cpu(lvid
->nextIntegrityExt
);
1592 udf_warn(sb
, "Too many LVID indirections (max %u), ignoring.\n",
1593 UDF_MAX_LVID_NESTING
);
1594 brelse(sbi
->s_lvid_bh
);
1595 sbi
->s_lvid_bh
= NULL
;
1600 * Process a main/reserve volume descriptor sequence.
1601 * @block First block of first extent of the sequence.
1602 * @lastblock Lastblock of first extent of the sequence.
1603 * @fileset There we store extent containing root fileset
1605 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1608 static noinline
int udf_process_sequence(
1609 struct super_block
*sb
,
1610 sector_t block
, sector_t lastblock
,
1611 struct kernel_lb_addr
*fileset
)
1613 struct buffer_head
*bh
= NULL
;
1614 struct udf_vds_record vds
[VDS_POS_LENGTH
];
1615 struct udf_vds_record
*curr
;
1616 struct generic_desc
*gd
;
1617 struct volDescPtr
*vdp
;
1621 long next_s
= 0, next_e
= 0;
1623 unsigned int indirections
= 0;
1625 memset(vds
, 0, sizeof(struct udf_vds_record
) * VDS_POS_LENGTH
);
1628 * Read the main descriptor sequence and find which descriptors
1631 for (; (!done
&& block
<= lastblock
); block
++) {
1633 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1636 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1637 (unsigned long long)block
);
1641 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1642 gd
= (struct generic_desc
*)bh
->b_data
;
1643 vdsn
= le32_to_cpu(gd
->volDescSeqNum
);
1645 case TAG_IDENT_PVD
: /* ISO 13346 3/10.1 */
1646 curr
= &vds
[VDS_POS_PRIMARY_VOL_DESC
];
1647 if (vdsn
>= curr
->volDescSeqNum
) {
1648 curr
->volDescSeqNum
= vdsn
;
1649 curr
->block
= block
;
1652 case TAG_IDENT_VDP
: /* ISO 13346 3/10.3 */
1653 curr
= &vds
[VDS_POS_VOL_DESC_PTR
];
1654 if (vdsn
>= curr
->volDescSeqNum
) {
1655 curr
->volDescSeqNum
= vdsn
;
1656 curr
->block
= block
;
1658 vdp
= (struct volDescPtr
*)bh
->b_data
;
1659 next_s
= le32_to_cpu(
1660 vdp
->nextVolDescSeqExt
.extLocation
);
1661 next_e
= le32_to_cpu(
1662 vdp
->nextVolDescSeqExt
.extLength
);
1663 next_e
= next_e
>> sb
->s_blocksize_bits
;
1667 case TAG_IDENT_IUVD
: /* ISO 13346 3/10.4 */
1668 curr
= &vds
[VDS_POS_IMP_USE_VOL_DESC
];
1669 if (vdsn
>= curr
->volDescSeqNum
) {
1670 curr
->volDescSeqNum
= vdsn
;
1671 curr
->block
= block
;
1674 case TAG_IDENT_PD
: /* ISO 13346 3/10.5 */
1675 curr
= &vds
[VDS_POS_PARTITION_DESC
];
1677 curr
->block
= block
;
1679 case TAG_IDENT_LVD
: /* ISO 13346 3/10.6 */
1680 curr
= &vds
[VDS_POS_LOGICAL_VOL_DESC
];
1681 if (vdsn
>= curr
->volDescSeqNum
) {
1682 curr
->volDescSeqNum
= vdsn
;
1683 curr
->block
= block
;
1686 case TAG_IDENT_USD
: /* ISO 13346 3/10.8 */
1687 curr
= &vds
[VDS_POS_UNALLOC_SPACE_DESC
];
1688 if (vdsn
>= curr
->volDescSeqNum
) {
1689 curr
->volDescSeqNum
= vdsn
;
1690 curr
->block
= block
;
1693 case TAG_IDENT_TD
: /* ISO 13346 3/10.9 */
1694 if (++indirections
> UDF_MAX_TD_NESTING
) {
1695 udf_err(sb
, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING
);
1700 vds
[VDS_POS_TERMINATING_DESC
].block
= block
;
1704 next_s
= next_e
= 0;
1712 * Now read interesting descriptors again and process them
1713 * in a suitable order
1715 if (!vds
[VDS_POS_PRIMARY_VOL_DESC
].block
) {
1716 udf_err(sb
, "Primary Volume Descriptor not found!\n");
1719 ret
= udf_load_pvoldesc(sb
, vds
[VDS_POS_PRIMARY_VOL_DESC
].block
);
1723 if (vds
[VDS_POS_LOGICAL_VOL_DESC
].block
) {
1724 ret
= udf_load_logicalvol(sb
,
1725 vds
[VDS_POS_LOGICAL_VOL_DESC
].block
,
1731 if (vds
[VDS_POS_PARTITION_DESC
].block
) {
1733 * We rescan the whole descriptor sequence to find
1734 * partition descriptor blocks and process them.
1736 for (block
= vds
[VDS_POS_PARTITION_DESC
].block
;
1737 block
< vds
[VDS_POS_TERMINATING_DESC
].block
;
1739 ret
= udf_load_partdesc(sb
, block
);
1749 * Load Volume Descriptor Sequence described by anchor in bh
1751 * Returns <0 on error, 0 on success
1753 static int udf_load_sequence(struct super_block
*sb
, struct buffer_head
*bh
,
1754 struct kernel_lb_addr
*fileset
)
1756 struct anchorVolDescPtr
*anchor
;
1757 sector_t main_s
, main_e
, reserve_s
, reserve_e
;
1760 anchor
= (struct anchorVolDescPtr
*)bh
->b_data
;
1762 /* Locate the main sequence */
1763 main_s
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLocation
);
1764 main_e
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLength
);
1765 main_e
= main_e
>> sb
->s_blocksize_bits
;
1768 /* Locate the reserve sequence */
1769 reserve_s
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLocation
);
1770 reserve_e
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLength
);
1771 reserve_e
= reserve_e
>> sb
->s_blocksize_bits
;
1772 reserve_e
+= reserve_s
;
1774 /* Process the main & reserve sequences */
1775 /* responsible for finding the PartitionDesc(s) */
1776 ret
= udf_process_sequence(sb
, main_s
, main_e
, fileset
);
1779 udf_sb_free_partitions(sb
);
1780 ret
= udf_process_sequence(sb
, reserve_s
, reserve_e
, fileset
);
1782 udf_sb_free_partitions(sb
);
1783 /* No sequence was OK, return -EIO */
1791 * Check whether there is an anchor block in the given block and
1792 * load Volume Descriptor Sequence if so.
1794 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1797 static int udf_check_anchor_block(struct super_block
*sb
, sector_t block
,
1798 struct kernel_lb_addr
*fileset
)
1800 struct buffer_head
*bh
;
1804 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_VARCONV
) &&
1805 udf_fixed_to_variable(block
) >=
1806 sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
)
1809 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1812 if (ident
!= TAG_IDENT_AVDP
) {
1816 ret
= udf_load_sequence(sb
, bh
, fileset
);
1822 * Search for an anchor volume descriptor pointer.
1824 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1827 static int udf_scan_anchors(struct super_block
*sb
, sector_t
*lastblock
,
1828 struct kernel_lb_addr
*fileset
)
1832 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1836 /* First try user provided anchor */
1837 if (sbi
->s_anchor
) {
1838 ret
= udf_check_anchor_block(sb
, sbi
->s_anchor
, fileset
);
1843 * according to spec, anchor is in either:
1847 * however, if the disc isn't closed, it could be 512.
1849 ret
= udf_check_anchor_block(sb
, sbi
->s_session
+ 256, fileset
);
1853 * The trouble is which block is the last one. Drives often misreport
1854 * this so we try various possibilities.
1856 last
[last_count
++] = *lastblock
;
1857 if (*lastblock
>= 1)
1858 last
[last_count
++] = *lastblock
- 1;
1859 last
[last_count
++] = *lastblock
+ 1;
1860 if (*lastblock
>= 2)
1861 last
[last_count
++] = *lastblock
- 2;
1862 if (*lastblock
>= 150)
1863 last
[last_count
++] = *lastblock
- 150;
1864 if (*lastblock
>= 152)
1865 last
[last_count
++] = *lastblock
- 152;
1867 for (i
= 0; i
< last_count
; i
++) {
1868 if (last
[i
] >= sb
->s_bdev
->bd_inode
->i_size
>>
1869 sb
->s_blocksize_bits
)
1871 ret
= udf_check_anchor_block(sb
, last
[i
], fileset
);
1872 if (ret
!= -EAGAIN
) {
1874 *lastblock
= last
[i
];
1879 ret
= udf_check_anchor_block(sb
, last
[i
] - 256, fileset
);
1880 if (ret
!= -EAGAIN
) {
1882 *lastblock
= last
[i
];
1887 /* Finally try block 512 in case media is open */
1888 return udf_check_anchor_block(sb
, sbi
->s_session
+ 512, fileset
);
1892 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1893 * area specified by it. The function expects sbi->s_lastblock to be the last
1894 * block on the media.
1896 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1899 static int udf_find_anchor(struct super_block
*sb
,
1900 struct kernel_lb_addr
*fileset
)
1902 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1903 sector_t lastblock
= sbi
->s_last_block
;
1906 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1910 /* No anchor found? Try VARCONV conversion of block numbers */
1911 UDF_SET_FLAG(sb
, UDF_FLAG_VARCONV
);
1912 lastblock
= udf_variable_to_fixed(sbi
->s_last_block
);
1913 /* Firstly, we try to not convert number of the last block */
1914 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1918 lastblock
= sbi
->s_last_block
;
1919 /* Secondly, we try with converted number of the last block */
1920 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1922 /* VARCONV didn't help. Clear it. */
1923 UDF_CLEAR_FLAG(sb
, UDF_FLAG_VARCONV
);
1927 sbi
->s_last_block
= lastblock
;
1932 * Check Volume Structure Descriptor, find Anchor block and load Volume
1933 * Descriptor Sequence.
1935 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1936 * block was not found.
1938 static int udf_load_vrs(struct super_block
*sb
, struct udf_options
*uopt
,
1939 int silent
, struct kernel_lb_addr
*fileset
)
1941 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1945 if (!sb_set_blocksize(sb
, uopt
->blocksize
)) {
1947 udf_warn(sb
, "Bad block size\n");
1950 sbi
->s_last_block
= uopt
->lastblock
;
1952 /* Check that it is NSR02 compliant */
1953 nsr_off
= udf_check_vsd(sb
);
1956 udf_warn(sb
, "No VRS found\n");
1960 udf_debug("Failed to read sector at offset %d. "
1961 "Assuming open disc. Skipping validity "
1962 "check\n", VSD_FIRST_SECTOR_OFFSET
);
1963 if (!sbi
->s_last_block
)
1964 sbi
->s_last_block
= udf_get_last_block(sb
);
1966 udf_debug("Validity check skipped because of novrs option\n");
1969 /* Look for anchor block and load Volume Descriptor Sequence */
1970 sbi
->s_anchor
= uopt
->anchor
;
1971 ret
= udf_find_anchor(sb
, fileset
);
1973 if (!silent
&& ret
== -EAGAIN
)
1974 udf_warn(sb
, "No anchor found\n");
1980 static void udf_open_lvid(struct super_block
*sb
)
1982 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1983 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1984 struct logicalVolIntegrityDesc
*lvid
;
1985 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1990 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1991 lvidiu
= udf_sb_lvidiu(sb
);
1995 mutex_lock(&sbi
->s_alloc_mutex
);
1996 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1997 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1998 ktime_get_real_ts(&ts
);
1999 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, ts
);
2000 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN
);
2002 lvid
->descTag
.descCRC
= cpu_to_le16(
2003 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
2004 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
2006 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
2007 mark_buffer_dirty(bh
);
2008 sbi
->s_lvid_dirty
= 0;
2009 mutex_unlock(&sbi
->s_alloc_mutex
);
2010 /* Make opening of filesystem visible on the media immediately */
2011 sync_dirty_buffer(bh
);
2014 static void udf_close_lvid(struct super_block
*sb
)
2016 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2017 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
2018 struct logicalVolIntegrityDesc
*lvid
;
2019 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2024 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2025 lvidiu
= udf_sb_lvidiu(sb
);
2029 mutex_lock(&sbi
->s_alloc_mutex
);
2030 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
2031 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
2032 ktime_get_real_ts(&ts
);
2033 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, ts
);
2034 if (UDF_MAX_WRITE_VERSION
> le16_to_cpu(lvidiu
->maxUDFWriteRev
))
2035 lvidiu
->maxUDFWriteRev
= cpu_to_le16(UDF_MAX_WRITE_VERSION
);
2036 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFReadRev
))
2037 lvidiu
->minUDFReadRev
= cpu_to_le16(sbi
->s_udfrev
);
2038 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFWriteRev
))
2039 lvidiu
->minUDFWriteRev
= cpu_to_le16(sbi
->s_udfrev
);
2040 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE
);
2042 lvid
->descTag
.descCRC
= cpu_to_le16(
2043 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
2044 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
2046 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
2048 * We set buffer uptodate unconditionally here to avoid spurious
2049 * warnings from mark_buffer_dirty() when previous EIO has marked
2050 * the buffer as !uptodate
2052 set_buffer_uptodate(bh
);
2053 mark_buffer_dirty(bh
);
2054 sbi
->s_lvid_dirty
= 0;
2055 mutex_unlock(&sbi
->s_alloc_mutex
);
2056 /* Make closing of filesystem visible on the media immediately */
2057 sync_dirty_buffer(bh
);
2060 u64
lvid_get_unique_id(struct super_block
*sb
)
2062 struct buffer_head
*bh
;
2063 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2064 struct logicalVolIntegrityDesc
*lvid
;
2065 struct logicalVolHeaderDesc
*lvhd
;
2069 bh
= sbi
->s_lvid_bh
;
2073 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2074 lvhd
= (struct logicalVolHeaderDesc
*)lvid
->logicalVolContentsUse
;
2076 mutex_lock(&sbi
->s_alloc_mutex
);
2077 ret
= uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
2078 if (!(++uniqueID
& 0xFFFFFFFF))
2080 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
2081 mutex_unlock(&sbi
->s_alloc_mutex
);
2082 mark_buffer_dirty(bh
);
2087 static int udf_fill_super(struct super_block
*sb
, void *options
, int silent
)
2090 struct inode
*inode
= NULL
;
2091 struct udf_options uopt
;
2092 struct kernel_lb_addr rootdir
, fileset
;
2093 struct udf_sb_info
*sbi
;
2094 bool lvid_open
= false;
2096 uopt
.flags
= (1 << UDF_FLAG_USE_AD_IN_ICB
) | (1 << UDF_FLAG_STRICT
);
2097 uopt
.uid
= INVALID_UID
;
2098 uopt
.gid
= INVALID_GID
;
2100 uopt
.fmode
= UDF_INVALID_MODE
;
2101 uopt
.dmode
= UDF_INVALID_MODE
;
2103 sbi
= kzalloc(sizeof(struct udf_sb_info
), GFP_KERNEL
);
2107 sb
->s_fs_info
= sbi
;
2109 mutex_init(&sbi
->s_alloc_mutex
);
2111 if (!udf_parse_options((char *)options
, &uopt
, false))
2112 goto parse_options_failure
;
2114 if (uopt
.flags
& (1 << UDF_FLAG_UTF8
) &&
2115 uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) {
2116 udf_err(sb
, "utf8 cannot be combined with iocharset\n");
2117 goto parse_options_failure
;
2119 #ifdef CONFIG_UDF_NLS
2120 if ((uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) && !uopt
.nls_map
) {
2121 uopt
.nls_map
= load_nls_default();
2123 uopt
.flags
&= ~(1 << UDF_FLAG_NLS_MAP
);
2125 udf_debug("Using default NLS map\n");
2128 if (!(uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)))
2129 uopt
.flags
|= (1 << UDF_FLAG_UTF8
);
2131 fileset
.logicalBlockNum
= 0xFFFFFFFF;
2132 fileset
.partitionReferenceNum
= 0xFFFF;
2134 sbi
->s_flags
= uopt
.flags
;
2135 sbi
->s_uid
= uopt
.uid
;
2136 sbi
->s_gid
= uopt
.gid
;
2137 sbi
->s_umask
= uopt
.umask
;
2138 sbi
->s_fmode
= uopt
.fmode
;
2139 sbi
->s_dmode
= uopt
.dmode
;
2140 sbi
->s_nls_map
= uopt
.nls_map
;
2141 rwlock_init(&sbi
->s_cred_lock
);
2143 if (uopt
.session
== 0xFFFFFFFF)
2144 sbi
->s_session
= udf_get_last_session(sb
);
2146 sbi
->s_session
= uopt
.session
;
2148 udf_debug("Multi-session=%d\n", sbi
->s_session
);
2150 /* Fill in the rest of the superblock */
2151 sb
->s_op
= &udf_sb_ops
;
2152 sb
->s_export_op
= &udf_export_ops
;
2154 sb
->s_magic
= UDF_SUPER_MAGIC
;
2155 sb
->s_time_gran
= 1000;
2157 if (uopt
.flags
& (1 << UDF_FLAG_BLOCKSIZE_SET
)) {
2158 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2160 uopt
.blocksize
= bdev_logical_block_size(sb
->s_bdev
);
2161 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2162 if (ret
== -EAGAIN
&& uopt
.blocksize
!= UDF_DEFAULT_BLOCKSIZE
) {
2164 pr_notice("Rescanning with blocksize %d\n",
2165 UDF_DEFAULT_BLOCKSIZE
);
2166 brelse(sbi
->s_lvid_bh
);
2167 sbi
->s_lvid_bh
= NULL
;
2168 uopt
.blocksize
= UDF_DEFAULT_BLOCKSIZE
;
2169 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2173 if (ret
== -EAGAIN
) {
2174 udf_warn(sb
, "No partition found (1)\n");
2180 udf_debug("Lastblock=%d\n", sbi
->s_last_block
);
2182 if (sbi
->s_lvid_bh
) {
2183 struct logicalVolIntegrityDescImpUse
*lvidiu
=
2185 uint16_t minUDFReadRev
;
2186 uint16_t minUDFWriteRev
;
2192 minUDFReadRev
= le16_to_cpu(lvidiu
->minUDFReadRev
);
2193 minUDFWriteRev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
2194 if (minUDFReadRev
> UDF_MAX_READ_VERSION
) {
2195 udf_err(sb
, "minUDFReadRev=%x (max is %x)\n",
2197 UDF_MAX_READ_VERSION
);
2200 } else if (minUDFWriteRev
> UDF_MAX_WRITE_VERSION
&&
2201 !(sb
->s_flags
& MS_RDONLY
)) {
2206 sbi
->s_udfrev
= minUDFWriteRev
;
2208 if (minUDFReadRev
>= UDF_VERS_USE_EXTENDED_FE
)
2209 UDF_SET_FLAG(sb
, UDF_FLAG_USE_EXTENDED_FE
);
2210 if (minUDFReadRev
>= UDF_VERS_USE_STREAMS
)
2211 UDF_SET_FLAG(sb
, UDF_FLAG_USE_STREAMS
);
2214 if (!sbi
->s_partitions
) {
2215 udf_warn(sb
, "No partition found (2)\n");
2220 if (sbi
->s_partmaps
[sbi
->s_partition
].s_partition_flags
&
2221 UDF_PART_FLAG_READ_ONLY
&&
2222 !(sb
->s_flags
& MS_RDONLY
)) {
2227 if (udf_find_fileset(sb
, &fileset
, &rootdir
)) {
2228 udf_warn(sb
, "No fileset found\n");
2234 struct timestamp ts
;
2235 udf_time_to_disk_stamp(&ts
, sbi
->s_record_time
);
2236 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2237 sbi
->s_volume_ident
,
2238 le16_to_cpu(ts
.year
), ts
.month
, ts
.day
,
2239 ts
.hour
, ts
.minute
, le16_to_cpu(ts
.typeAndTimezone
));
2241 if (!(sb
->s_flags
& MS_RDONLY
)) {
2246 /* Assign the root inode */
2247 /* assign inodes by physical block number */
2248 /* perhaps it's not extensible enough, but for now ... */
2249 inode
= udf_iget(sb
, &rootdir
);
2250 if (IS_ERR(inode
)) {
2251 udf_err(sb
, "Error in udf_iget, block=%d, partition=%d\n",
2252 rootdir
.logicalBlockNum
, rootdir
.partitionReferenceNum
);
2253 ret
= PTR_ERR(inode
);
2257 /* Allocate a dentry for the root inode */
2258 sb
->s_root
= d_make_root(inode
);
2260 udf_err(sb
, "Couldn't allocate root dentry\n");
2264 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
2265 sb
->s_max_links
= UDF_MAX_LINKS
;
2269 iput(sbi
->s_vat_inode
);
2270 parse_options_failure
:
2271 #ifdef CONFIG_UDF_NLS
2272 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2273 unload_nls(sbi
->s_nls_map
);
2277 brelse(sbi
->s_lvid_bh
);
2278 udf_sb_free_partitions(sb
);
2280 sb
->s_fs_info
= NULL
;
2285 void _udf_err(struct super_block
*sb
, const char *function
,
2286 const char *fmt
, ...)
2288 struct va_format vaf
;
2291 va_start(args
, fmt
);
2296 pr_err("error (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2301 void _udf_warn(struct super_block
*sb
, const char *function
,
2302 const char *fmt
, ...)
2304 struct va_format vaf
;
2307 va_start(args
, fmt
);
2312 pr_warn("warning (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2317 static void udf_put_super(struct super_block
*sb
)
2319 struct udf_sb_info
*sbi
;
2323 iput(sbi
->s_vat_inode
);
2324 #ifdef CONFIG_UDF_NLS
2325 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2326 unload_nls(sbi
->s_nls_map
);
2328 if (!(sb
->s_flags
& MS_RDONLY
))
2330 brelse(sbi
->s_lvid_bh
);
2331 udf_sb_free_partitions(sb
);
2332 mutex_destroy(&sbi
->s_alloc_mutex
);
2333 kfree(sb
->s_fs_info
);
2334 sb
->s_fs_info
= NULL
;
2337 static int udf_sync_fs(struct super_block
*sb
, int wait
)
2339 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2341 mutex_lock(&sbi
->s_alloc_mutex
);
2342 if (sbi
->s_lvid_dirty
) {
2344 * Blockdevice will be synced later so we don't have to submit
2347 mark_buffer_dirty(sbi
->s_lvid_bh
);
2348 sbi
->s_lvid_dirty
= 0;
2350 mutex_unlock(&sbi
->s_alloc_mutex
);
2355 static int udf_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2357 struct super_block
*sb
= dentry
->d_sb
;
2358 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2359 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2360 u64 id
= huge_encode_dev(sb
->s_bdev
->bd_dev
);
2362 lvidiu
= udf_sb_lvidiu(sb
);
2363 buf
->f_type
= UDF_SUPER_MAGIC
;
2364 buf
->f_bsize
= sb
->s_blocksize
;
2365 buf
->f_blocks
= sbi
->s_partmaps
[sbi
->s_partition
].s_partition_len
;
2366 buf
->f_bfree
= udf_count_free(sb
);
2367 buf
->f_bavail
= buf
->f_bfree
;
2368 buf
->f_files
= (lvidiu
!= NULL
? (le32_to_cpu(lvidiu
->numFiles
) +
2369 le32_to_cpu(lvidiu
->numDirs
)) : 0)
2371 buf
->f_ffree
= buf
->f_bfree
;
2372 buf
->f_namelen
= UDF_NAME_LEN
;
2373 buf
->f_fsid
.val
[0] = (u32
)id
;
2374 buf
->f_fsid
.val
[1] = (u32
)(id
>> 32);
2379 static unsigned int udf_count_free_bitmap(struct super_block
*sb
,
2380 struct udf_bitmap
*bitmap
)
2382 struct buffer_head
*bh
= NULL
;
2383 unsigned int accum
= 0;
2385 int block
= 0, newblock
;
2386 struct kernel_lb_addr loc
;
2390 struct spaceBitmapDesc
*bm
;
2392 loc
.logicalBlockNum
= bitmap
->s_extPosition
;
2393 loc
.partitionReferenceNum
= UDF_SB(sb
)->s_partition
;
2394 bh
= udf_read_ptagged(sb
, &loc
, 0, &ident
);
2397 udf_err(sb
, "udf_count_free failed\n");
2399 } else if (ident
!= TAG_IDENT_SBD
) {
2401 udf_err(sb
, "udf_count_free failed\n");
2405 bm
= (struct spaceBitmapDesc
*)bh
->b_data
;
2406 bytes
= le32_to_cpu(bm
->numOfBytes
);
2407 index
= sizeof(struct spaceBitmapDesc
); /* offset in first block only */
2408 ptr
= (uint8_t *)bh
->b_data
;
2411 u32 cur_bytes
= min_t(u32
, bytes
, sb
->s_blocksize
- index
);
2412 accum
+= bitmap_weight((const unsigned long *)(ptr
+ index
),
2417 newblock
= udf_get_lb_pblock(sb
, &loc
, ++block
);
2418 bh
= udf_tread(sb
, newblock
);
2420 udf_debug("read failed\n");
2424 ptr
= (uint8_t *)bh
->b_data
;
2432 static unsigned int udf_count_free_table(struct super_block
*sb
,
2433 struct inode
*table
)
2435 unsigned int accum
= 0;
2437 struct kernel_lb_addr eloc
;
2439 struct extent_position epos
;
2441 mutex_lock(&UDF_SB(sb
)->s_alloc_mutex
);
2442 epos
.block
= UDF_I(table
)->i_location
;
2443 epos
.offset
= sizeof(struct unallocSpaceEntry
);
2446 while ((etype
= udf_next_aext(table
, &epos
, &eloc
, &elen
, 1)) != -1)
2447 accum
+= (elen
>> table
->i_sb
->s_blocksize_bits
);
2450 mutex_unlock(&UDF_SB(sb
)->s_alloc_mutex
);
2455 static unsigned int udf_count_free(struct super_block
*sb
)
2457 unsigned int accum
= 0;
2458 struct udf_sb_info
*sbi
;
2459 struct udf_part_map
*map
;
2462 if (sbi
->s_lvid_bh
) {
2463 struct logicalVolIntegrityDesc
*lvid
=
2464 (struct logicalVolIntegrityDesc
*)
2465 sbi
->s_lvid_bh
->b_data
;
2466 if (le32_to_cpu(lvid
->numOfPartitions
) > sbi
->s_partition
) {
2467 accum
= le32_to_cpu(
2468 lvid
->freeSpaceTable
[sbi
->s_partition
]);
2469 if (accum
== 0xFFFFFFFF)
2477 map
= &sbi
->s_partmaps
[sbi
->s_partition
];
2478 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
) {
2479 accum
+= udf_count_free_bitmap(sb
,
2480 map
->s_uspace
.s_bitmap
);
2482 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
) {
2483 accum
+= udf_count_free_bitmap(sb
,
2484 map
->s_fspace
.s_bitmap
);
2489 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
) {
2490 accum
+= udf_count_free_table(sb
,
2491 map
->s_uspace
.s_table
);
2493 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
) {
2494 accum
+= udf_count_free_table(sb
,
2495 map
->s_fspace
.s_table
);
2501 MODULE_AUTHOR("Ben Fennema");
2502 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2503 MODULE_LICENSE("GPL");
2504 module_init(init_udf_fs
)
2505 module_exit(exit_udf_fs
)