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
81 enum { UDF_MAX_LINKS
= 0xffff };
83 /* These are the "meat" - everything else is stuffing */
84 static int udf_fill_super(struct super_block
*, void *, int);
85 static void udf_put_super(struct super_block
*);
86 static int udf_sync_fs(struct super_block
*, int);
87 static int udf_remount_fs(struct super_block
*, int *, char *);
88 static void udf_load_logicalvolint(struct super_block
*, struct kernel_extent_ad
);
89 static int udf_find_fileset(struct super_block
*, struct kernel_lb_addr
*,
90 struct kernel_lb_addr
*);
91 static void udf_load_fileset(struct super_block
*, struct buffer_head
*,
92 struct kernel_lb_addr
*);
93 static void udf_open_lvid(struct super_block
*);
94 static void udf_close_lvid(struct super_block
*);
95 static unsigned int udf_count_free(struct super_block
*);
96 static int udf_statfs(struct dentry
*, struct kstatfs
*);
97 static int udf_show_options(struct seq_file
*, struct dentry
*);
99 struct logicalVolIntegrityDescImpUse
*udf_sb_lvidiu(struct super_block
*sb
)
101 struct logicalVolIntegrityDesc
*lvid
;
102 unsigned int partnum
;
105 if (!UDF_SB(sb
)->s_lvid_bh
)
107 lvid
= (struct logicalVolIntegrityDesc
*)UDF_SB(sb
)->s_lvid_bh
->b_data
;
108 partnum
= le32_to_cpu(lvid
->numOfPartitions
);
109 if ((sb
->s_blocksize
- sizeof(struct logicalVolIntegrityDescImpUse
) -
110 offsetof(struct logicalVolIntegrityDesc
, impUse
)) /
111 (2 * sizeof(uint32_t)) < partnum
) {
112 udf_err(sb
, "Logical volume integrity descriptor corrupted "
113 "(numOfPartitions = %u)!\n", partnum
);
116 /* The offset is to skip freeSpaceTable and sizeTable arrays */
117 offset
= partnum
* 2 * sizeof(uint32_t);
118 return (struct logicalVolIntegrityDescImpUse
*)&(lvid
->impUse
[offset
]);
121 /* UDF filesystem type */
122 static struct dentry
*udf_mount(struct file_system_type
*fs_type
,
123 int flags
, const char *dev_name
, void *data
)
125 return mount_bdev(fs_type
, flags
, dev_name
, data
, udf_fill_super
);
128 static struct file_system_type udf_fstype
= {
129 .owner
= THIS_MODULE
,
132 .kill_sb
= kill_block_super
,
133 .fs_flags
= FS_REQUIRES_DEV
,
135 MODULE_ALIAS_FS("udf");
137 static struct kmem_cache
*udf_inode_cachep
;
139 static struct inode
*udf_alloc_inode(struct super_block
*sb
)
141 struct udf_inode_info
*ei
;
142 ei
= kmem_cache_alloc(udf_inode_cachep
, GFP_KERNEL
);
147 ei
->i_lenExtents
= 0;
148 ei
->i_next_alloc_block
= 0;
149 ei
->i_next_alloc_goal
= 0;
151 init_rwsem(&ei
->i_data_sem
);
152 ei
->cached_extent
.lstart
= -1;
153 spin_lock_init(&ei
->i_extent_cache_lock
);
155 return &ei
->vfs_inode
;
158 static void udf_i_callback(struct rcu_head
*head
)
160 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
161 kmem_cache_free(udf_inode_cachep
, UDF_I(inode
));
164 static void udf_destroy_inode(struct inode
*inode
)
166 call_rcu(&inode
->i_rcu
, udf_i_callback
);
169 static void init_once(void *foo
)
171 struct udf_inode_info
*ei
= (struct udf_inode_info
*)foo
;
173 ei
->i_ext
.i_data
= NULL
;
174 inode_init_once(&ei
->vfs_inode
);
177 static int __init
init_inodecache(void)
179 udf_inode_cachep
= kmem_cache_create("udf_inode_cache",
180 sizeof(struct udf_inode_info
),
181 0, (SLAB_RECLAIM_ACCOUNT
|
185 if (!udf_inode_cachep
)
190 static void destroy_inodecache(void)
193 * Make sure all delayed rcu free inodes are flushed before we
197 kmem_cache_destroy(udf_inode_cachep
);
200 /* Superblock operations */
201 static const struct super_operations udf_sb_ops
= {
202 .alloc_inode
= udf_alloc_inode
,
203 .destroy_inode
= udf_destroy_inode
,
204 .write_inode
= udf_write_inode
,
205 .evict_inode
= udf_evict_inode
,
206 .put_super
= udf_put_super
,
207 .sync_fs
= udf_sync_fs
,
208 .statfs
= udf_statfs
,
209 .remount_fs
= udf_remount_fs
,
210 .show_options
= udf_show_options
,
215 unsigned int blocksize
;
216 unsigned int session
;
217 unsigned int lastblock
;
220 unsigned short partition
;
221 unsigned int fileset
;
222 unsigned int rootdir
;
229 struct nls_table
*nls_map
;
232 static int __init
init_udf_fs(void)
236 err
= init_inodecache();
239 err
= register_filesystem(&udf_fstype
);
246 destroy_inodecache();
252 static void __exit
exit_udf_fs(void)
254 unregister_filesystem(&udf_fstype
);
255 destroy_inodecache();
258 module_init(init_udf_fs
)
259 module_exit(exit_udf_fs
)
261 static int udf_sb_alloc_partition_maps(struct super_block
*sb
, u32 count
)
263 struct udf_sb_info
*sbi
= UDF_SB(sb
);
265 sbi
->s_partmaps
= kcalloc(count
, sizeof(struct udf_part_map
),
267 if (!sbi
->s_partmaps
) {
268 udf_err(sb
, "Unable to allocate space for %d partition maps\n",
270 sbi
->s_partitions
= 0;
274 sbi
->s_partitions
= count
;
278 static void udf_sb_free_bitmap(struct udf_bitmap
*bitmap
)
281 int nr_groups
= bitmap
->s_nr_groups
;
282 int size
= sizeof(struct udf_bitmap
) + (sizeof(struct buffer_head
*) *
285 for (i
= 0; i
< nr_groups
; i
++)
286 if (bitmap
->s_block_bitmap
[i
])
287 brelse(bitmap
->s_block_bitmap
[i
]);
289 if (size
<= PAGE_SIZE
)
295 static void udf_free_partition(struct udf_part_map
*map
)
298 struct udf_meta_data
*mdata
;
300 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
)
301 iput(map
->s_uspace
.s_table
);
302 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
)
303 iput(map
->s_fspace
.s_table
);
304 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
)
305 udf_sb_free_bitmap(map
->s_uspace
.s_bitmap
);
306 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
)
307 udf_sb_free_bitmap(map
->s_fspace
.s_bitmap
);
308 if (map
->s_partition_type
== UDF_SPARABLE_MAP15
)
309 for (i
= 0; i
< 4; i
++)
310 brelse(map
->s_type_specific
.s_sparing
.s_spar_map
[i
]);
311 else if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
312 mdata
= &map
->s_type_specific
.s_metadata
;
313 iput(mdata
->s_metadata_fe
);
314 mdata
->s_metadata_fe
= NULL
;
316 iput(mdata
->s_mirror_fe
);
317 mdata
->s_mirror_fe
= NULL
;
319 iput(mdata
->s_bitmap_fe
);
320 mdata
->s_bitmap_fe
= NULL
;
324 static void udf_sb_free_partitions(struct super_block
*sb
)
326 struct udf_sb_info
*sbi
= UDF_SB(sb
);
328 if (sbi
->s_partmaps
== NULL
)
330 for (i
= 0; i
< sbi
->s_partitions
; i
++)
331 udf_free_partition(&sbi
->s_partmaps
[i
]);
332 kfree(sbi
->s_partmaps
);
333 sbi
->s_partmaps
= NULL
;
336 static int udf_show_options(struct seq_file
*seq
, struct dentry
*root
)
338 struct super_block
*sb
= root
->d_sb
;
339 struct udf_sb_info
*sbi
= UDF_SB(sb
);
341 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_STRICT
))
342 seq_puts(seq
, ",nostrict");
343 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_BLOCKSIZE_SET
))
344 seq_printf(seq
, ",bs=%lu", sb
->s_blocksize
);
345 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNHIDE
))
346 seq_puts(seq
, ",unhide");
347 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNDELETE
))
348 seq_puts(seq
, ",undelete");
349 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_AD_IN_ICB
))
350 seq_puts(seq
, ",noadinicb");
351 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_SHORT_AD
))
352 seq_puts(seq
, ",shortad");
353 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_FORGET
))
354 seq_puts(seq
, ",uid=forget");
355 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_IGNORE
))
356 seq_puts(seq
, ",uid=ignore");
357 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_FORGET
))
358 seq_puts(seq
, ",gid=forget");
359 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_IGNORE
))
360 seq_puts(seq
, ",gid=ignore");
361 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_SET
))
362 seq_printf(seq
, ",uid=%u", from_kuid(&init_user_ns
, sbi
->s_uid
));
363 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_SET
))
364 seq_printf(seq
, ",gid=%u", from_kgid(&init_user_ns
, sbi
->s_gid
));
365 if (sbi
->s_umask
!= 0)
366 seq_printf(seq
, ",umask=%ho", sbi
->s_umask
);
367 if (sbi
->s_fmode
!= UDF_INVALID_MODE
)
368 seq_printf(seq
, ",mode=%ho", sbi
->s_fmode
);
369 if (sbi
->s_dmode
!= UDF_INVALID_MODE
)
370 seq_printf(seq
, ",dmode=%ho", sbi
->s_dmode
);
371 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_SESSION_SET
))
372 seq_printf(seq
, ",session=%u", sbi
->s_session
);
373 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_LASTBLOCK_SET
))
374 seq_printf(seq
, ",lastblock=%u", sbi
->s_last_block
);
375 if (sbi
->s_anchor
!= 0)
376 seq_printf(seq
, ",anchor=%u", sbi
->s_anchor
);
378 * volume, partition, fileset and rootdir seem to be ignored
381 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UTF8
))
382 seq_puts(seq
, ",utf8");
383 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
) && sbi
->s_nls_map
)
384 seq_printf(seq
, ",iocharset=%s", sbi
->s_nls_map
->charset
);
393 * Parse mount options.
396 * The following mount options are supported:
398 * gid= Set the default group.
399 * umask= Set the default umask.
400 * mode= Set the default file permissions.
401 * dmode= Set the default directory permissions.
402 * uid= Set the default user.
403 * bs= Set the block size.
404 * unhide Show otherwise hidden files.
405 * undelete Show deleted files in lists.
406 * adinicb Embed data in the inode (default)
407 * noadinicb Don't embed data in the inode
408 * shortad Use short ad's
409 * longad Use long ad's (default)
410 * nostrict Unset strict conformance
411 * iocharset= Set the NLS character set
413 * The remaining are for debugging and disaster recovery:
415 * novrs Skip volume sequence recognition
417 * The following expect a offset from 0.
419 * session= Set the CDROM session (default= last session)
420 * anchor= Override standard anchor location. (default= 256)
421 * volume= Override the VolumeDesc location. (unused)
422 * partition= Override the PartitionDesc location. (unused)
423 * lastblock= Set the last block of the filesystem/
425 * The following expect a offset from the partition root.
427 * fileset= Override the fileset block location. (unused)
428 * rootdir= Override the root directory location. (unused)
429 * WARNING: overriding the rootdir to a non-directory may
430 * yield highly unpredictable results.
433 * options Pointer to mount options string.
434 * uopts Pointer to mount options variable.
437 * <return> 1 Mount options parsed okay.
438 * <return> 0 Error parsing mount options.
441 * July 1, 1997 - Andrew E. Mileski
442 * Written, tested, and released.
446 Opt_novrs
, Opt_nostrict
, Opt_bs
, Opt_unhide
, Opt_undelete
,
447 Opt_noadinicb
, Opt_adinicb
, Opt_shortad
, Opt_longad
,
448 Opt_gid
, Opt_uid
, Opt_umask
, Opt_session
, Opt_lastblock
,
449 Opt_anchor
, Opt_volume
, Opt_partition
, Opt_fileset
,
450 Opt_rootdir
, Opt_utf8
, Opt_iocharset
,
451 Opt_err
, Opt_uforget
, Opt_uignore
, Opt_gforget
, Opt_gignore
,
455 static const match_table_t tokens
= {
456 {Opt_novrs
, "novrs"},
457 {Opt_nostrict
, "nostrict"},
459 {Opt_unhide
, "unhide"},
460 {Opt_undelete
, "undelete"},
461 {Opt_noadinicb
, "noadinicb"},
462 {Opt_adinicb
, "adinicb"},
463 {Opt_shortad
, "shortad"},
464 {Opt_longad
, "longad"},
465 {Opt_uforget
, "uid=forget"},
466 {Opt_uignore
, "uid=ignore"},
467 {Opt_gforget
, "gid=forget"},
468 {Opt_gignore
, "gid=ignore"},
471 {Opt_umask
, "umask=%o"},
472 {Opt_session
, "session=%u"},
473 {Opt_lastblock
, "lastblock=%u"},
474 {Opt_anchor
, "anchor=%u"},
475 {Opt_volume
, "volume=%u"},
476 {Opt_partition
, "partition=%u"},
477 {Opt_fileset
, "fileset=%u"},
478 {Opt_rootdir
, "rootdir=%u"},
480 {Opt_iocharset
, "iocharset=%s"},
481 {Opt_fmode
, "mode=%o"},
482 {Opt_dmode
, "dmode=%o"},
486 static int udf_parse_options(char *options
, struct udf_options
*uopt
,
493 uopt
->partition
= 0xFFFF;
494 uopt
->session
= 0xFFFFFFFF;
497 uopt
->volume
= 0xFFFFFFFF;
498 uopt
->rootdir
= 0xFFFFFFFF;
499 uopt
->fileset
= 0xFFFFFFFF;
500 uopt
->nls_map
= NULL
;
505 while ((p
= strsep(&options
, ",")) != NULL
) {
506 substring_t args
[MAX_OPT_ARGS
];
512 token
= match_token(p
, tokens
, args
);
518 if (match_int(&args
[0], &option
))
521 if (n
!= 512 && n
!= 1024 && n
!= 2048 && n
!= 4096)
524 uopt
->flags
|= (1 << UDF_FLAG_BLOCKSIZE_SET
);
527 uopt
->flags
|= (1 << UDF_FLAG_UNHIDE
);
530 uopt
->flags
|= (1 << UDF_FLAG_UNDELETE
);
533 uopt
->flags
&= ~(1 << UDF_FLAG_USE_AD_IN_ICB
);
536 uopt
->flags
|= (1 << UDF_FLAG_USE_AD_IN_ICB
);
539 uopt
->flags
|= (1 << UDF_FLAG_USE_SHORT_AD
);
542 uopt
->flags
&= ~(1 << UDF_FLAG_USE_SHORT_AD
);
545 if (match_int(args
, &option
))
547 uopt
->gid
= make_kgid(current_user_ns(), option
);
548 if (!gid_valid(uopt
->gid
))
550 uopt
->flags
|= (1 << UDF_FLAG_GID_SET
);
553 if (match_int(args
, &option
))
555 uopt
->uid
= make_kuid(current_user_ns(), option
);
556 if (!uid_valid(uopt
->uid
))
558 uopt
->flags
|= (1 << UDF_FLAG_UID_SET
);
561 if (match_octal(args
, &option
))
563 uopt
->umask
= option
;
566 uopt
->flags
&= ~(1 << UDF_FLAG_STRICT
);
569 if (match_int(args
, &option
))
571 uopt
->session
= option
;
573 uopt
->flags
|= (1 << UDF_FLAG_SESSION_SET
);
576 if (match_int(args
, &option
))
578 uopt
->lastblock
= option
;
580 uopt
->flags
|= (1 << UDF_FLAG_LASTBLOCK_SET
);
583 if (match_int(args
, &option
))
585 uopt
->anchor
= option
;
588 if (match_int(args
, &option
))
590 uopt
->volume
= option
;
593 if (match_int(args
, &option
))
595 uopt
->partition
= option
;
598 if (match_int(args
, &option
))
600 uopt
->fileset
= option
;
603 if (match_int(args
, &option
))
605 uopt
->rootdir
= option
;
608 uopt
->flags
|= (1 << UDF_FLAG_UTF8
);
610 #ifdef CONFIG_UDF_NLS
612 uopt
->nls_map
= load_nls(args
[0].from
);
613 uopt
->flags
|= (1 << UDF_FLAG_NLS_MAP
);
617 uopt
->flags
|= (1 << UDF_FLAG_UID_IGNORE
);
620 uopt
->flags
|= (1 << UDF_FLAG_UID_FORGET
);
623 uopt
->flags
|= (1 << UDF_FLAG_GID_IGNORE
);
626 uopt
->flags
|= (1 << UDF_FLAG_GID_FORGET
);
629 if (match_octal(args
, &option
))
631 uopt
->fmode
= option
& 0777;
634 if (match_octal(args
, &option
))
636 uopt
->dmode
= option
& 0777;
639 pr_err("bad mount option \"%s\" or missing value\n", p
);
646 static int udf_remount_fs(struct super_block
*sb
, int *flags
, char *options
)
648 struct udf_options uopt
;
649 struct udf_sb_info
*sbi
= UDF_SB(sb
);
651 struct logicalVolIntegrityDescImpUse
*lvidiu
= udf_sb_lvidiu(sb
);
655 int write_rev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
656 if (write_rev
> UDF_MAX_WRITE_VERSION
&& !(*flags
& MS_RDONLY
))
660 uopt
.flags
= sbi
->s_flags
;
661 uopt
.uid
= sbi
->s_uid
;
662 uopt
.gid
= sbi
->s_gid
;
663 uopt
.umask
= sbi
->s_umask
;
664 uopt
.fmode
= sbi
->s_fmode
;
665 uopt
.dmode
= sbi
->s_dmode
;
667 if (!udf_parse_options(options
, &uopt
, true))
670 write_lock(&sbi
->s_cred_lock
);
671 sbi
->s_flags
= uopt
.flags
;
672 sbi
->s_uid
= uopt
.uid
;
673 sbi
->s_gid
= uopt
.gid
;
674 sbi
->s_umask
= uopt
.umask
;
675 sbi
->s_fmode
= uopt
.fmode
;
676 sbi
->s_dmode
= uopt
.dmode
;
677 write_unlock(&sbi
->s_cred_lock
);
679 if ((*flags
& MS_RDONLY
) == (sb
->s_flags
& MS_RDONLY
))
682 if (*flags
& MS_RDONLY
)
691 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
692 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
693 static loff_t
udf_check_vsd(struct super_block
*sb
)
695 struct volStructDesc
*vsd
= NULL
;
696 loff_t sector
= VSD_FIRST_SECTOR_OFFSET
;
698 struct buffer_head
*bh
= NULL
;
701 struct udf_sb_info
*sbi
;
704 if (sb
->s_blocksize
< sizeof(struct volStructDesc
))
705 sectorsize
= sizeof(struct volStructDesc
);
707 sectorsize
= sb
->s_blocksize
;
709 sector
+= (sbi
->s_session
<< sb
->s_blocksize_bits
);
711 udf_debug("Starting at sector %u (%ld byte sectors)\n",
712 (unsigned int)(sector
>> sb
->s_blocksize_bits
),
714 /* Process the sequence (if applicable). The hard limit on the sector
715 * offset is arbitrary, hopefully large enough so that all valid UDF
716 * filesystems will be recognised. There is no mention of an upper
717 * bound to the size of the volume recognition area in the standard.
718 * The limit will prevent the code to read all the sectors of a
719 * specially crafted image (like a bluray disc full of CD001 sectors),
720 * potentially causing minutes or even hours of uninterruptible I/O
721 * activity. This actually happened with uninitialised SSD partitions
722 * (all 0xFF) before the check for the limit and all valid IDs were
724 for (; !nsr02
&& !nsr03
&& sector
< VSD_MAX_SECTOR_OFFSET
;
725 sector
+= sectorsize
) {
727 bh
= udf_tread(sb
, sector
>> sb
->s_blocksize_bits
);
731 /* Look for ISO descriptors */
732 vsd
= (struct volStructDesc
*)(bh
->b_data
+
733 (sector
& (sb
->s_blocksize
- 1)));
735 if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CD001
,
737 switch (vsd
->structType
) {
739 udf_debug("ISO9660 Boot Record found\n");
742 udf_debug("ISO9660 Primary Volume Descriptor found\n");
745 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
748 udf_debug("ISO9660 Volume Partition Descriptor found\n");
751 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
754 udf_debug("ISO9660 VRS (%u) found\n",
758 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BEA01
,
761 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_TEA01
,
765 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR02
,
768 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR03
,
771 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BOOT2
,
774 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CDW02
,
778 /* invalid id : end of volume recognition area */
789 else if (!bh
&& sector
- (sbi
->s_session
<< sb
->s_blocksize_bits
) ==
790 VSD_FIRST_SECTOR_OFFSET
)
796 static int udf_find_fileset(struct super_block
*sb
,
797 struct kernel_lb_addr
*fileset
,
798 struct kernel_lb_addr
*root
)
800 struct buffer_head
*bh
= NULL
;
803 struct udf_sb_info
*sbi
;
805 if (fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
806 fileset
->partitionReferenceNum
!= 0xFFFF) {
807 bh
= udf_read_ptagged(sb
, fileset
, 0, &ident
);
811 } else if (ident
!= TAG_IDENT_FSD
) {
820 /* Search backwards through the partitions */
821 struct kernel_lb_addr newfileset
;
823 /* --> cvg: FIXME - is it reasonable? */
826 for (newfileset
.partitionReferenceNum
= sbi
->s_partitions
- 1;
827 (newfileset
.partitionReferenceNum
!= 0xFFFF &&
828 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
829 fileset
->partitionReferenceNum
== 0xFFFF);
830 newfileset
.partitionReferenceNum
--) {
831 lastblock
= sbi
->s_partmaps
832 [newfileset
.partitionReferenceNum
]
834 newfileset
.logicalBlockNum
= 0;
837 bh
= udf_read_ptagged(sb
, &newfileset
, 0,
840 newfileset
.logicalBlockNum
++;
847 struct spaceBitmapDesc
*sp
;
848 sp
= (struct spaceBitmapDesc
*)
850 newfileset
.logicalBlockNum
+= 1 +
851 ((le32_to_cpu(sp
->numOfBytes
) +
852 sizeof(struct spaceBitmapDesc
)
853 - 1) >> sb
->s_blocksize_bits
);
858 *fileset
= newfileset
;
861 newfileset
.logicalBlockNum
++;
866 } while (newfileset
.logicalBlockNum
< lastblock
&&
867 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
868 fileset
->partitionReferenceNum
== 0xFFFF);
872 if ((fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
873 fileset
->partitionReferenceNum
!= 0xFFFF) && bh
) {
874 udf_debug("Fileset at block=%d, partition=%d\n",
875 fileset
->logicalBlockNum
,
876 fileset
->partitionReferenceNum
);
878 sbi
->s_partition
= fileset
->partitionReferenceNum
;
879 udf_load_fileset(sb
, bh
, root
);
887 * Load primary Volume Descriptor Sequence
889 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
892 static int udf_load_pvoldesc(struct super_block
*sb
, sector_t block
)
894 struct primaryVolDesc
*pvoldesc
;
895 struct ustr
*instr
, *outstr
;
896 struct buffer_head
*bh
;
900 instr
= kmalloc(sizeof(struct ustr
), GFP_NOFS
);
904 outstr
= kmalloc(sizeof(struct ustr
), GFP_NOFS
);
908 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
914 if (ident
!= TAG_IDENT_PVD
) {
919 pvoldesc
= (struct primaryVolDesc
*)bh
->b_data
;
921 if (udf_disk_stamp_to_time(&UDF_SB(sb
)->s_record_time
,
922 pvoldesc
->recordingDateAndTime
)) {
924 struct timestamp
*ts
= &pvoldesc
->recordingDateAndTime
;
925 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
926 le16_to_cpu(ts
->year
), ts
->month
, ts
->day
, ts
->hour
,
927 ts
->minute
, le16_to_cpu(ts
->typeAndTimezone
));
931 if (!udf_build_ustr(instr
, pvoldesc
->volIdent
, 32)) {
932 ret
= udf_CS0toUTF8(outstr
, instr
);
936 strncpy(UDF_SB(sb
)->s_volume_ident
, outstr
->u_name
,
937 outstr
->u_len
> 31 ? 31 : outstr
->u_len
);
938 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb
)->s_volume_ident
);
941 if (!udf_build_ustr(instr
, pvoldesc
->volSetIdent
, 128)) {
942 ret
= udf_CS0toUTF8(outstr
, instr
);
946 udf_debug("volSetIdent[] = '%s'\n", outstr
->u_name
);
959 struct inode
*udf_find_metadata_inode_efe(struct super_block
*sb
,
960 u32 meta_file_loc
, u32 partition_num
)
962 struct kernel_lb_addr addr
;
963 struct inode
*metadata_fe
;
965 addr
.logicalBlockNum
= meta_file_loc
;
966 addr
.partitionReferenceNum
= partition_num
;
968 metadata_fe
= udf_iget_special(sb
, &addr
);
970 if (IS_ERR(metadata_fe
)) {
971 udf_warn(sb
, "metadata inode efe not found\n");
974 if (UDF_I(metadata_fe
)->i_alloc_type
!= ICBTAG_FLAG_AD_SHORT
) {
975 udf_warn(sb
, "metadata inode efe does not have short allocation descriptors!\n");
977 return ERR_PTR(-EIO
);
983 static int udf_load_metadata_files(struct super_block
*sb
, int partition
)
985 struct udf_sb_info
*sbi
= UDF_SB(sb
);
986 struct udf_part_map
*map
;
987 struct udf_meta_data
*mdata
;
988 struct kernel_lb_addr addr
;
991 map
= &sbi
->s_partmaps
[partition
];
992 mdata
= &map
->s_type_specific
.s_metadata
;
994 /* metadata address */
995 udf_debug("Metadata file location: block = %d part = %d\n",
996 mdata
->s_meta_file_loc
, map
->s_partition_num
);
998 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_meta_file_loc
,
999 map
->s_partition_num
);
1001 /* mirror file entry */
1002 udf_debug("Mirror metadata file location: block = %d part = %d\n",
1003 mdata
->s_mirror_file_loc
, map
->s_partition_num
);
1005 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_mirror_file_loc
,
1006 map
->s_partition_num
);
1009 udf_err(sb
, "Both metadata and mirror metadata inode efe can not found\n");
1012 mdata
->s_mirror_fe
= fe
;
1014 mdata
->s_metadata_fe
= fe
;
1020 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1022 if (mdata
->s_bitmap_file_loc
!= 0xFFFFFFFF) {
1023 addr
.logicalBlockNum
= mdata
->s_bitmap_file_loc
;
1024 addr
.partitionReferenceNum
= map
->s_partition_num
;
1026 udf_debug("Bitmap file location: block = %d part = %d\n",
1027 addr
.logicalBlockNum
, addr
.partitionReferenceNum
);
1029 fe
= udf_iget_special(sb
, &addr
);
1031 if (sb
->s_flags
& MS_RDONLY
)
1032 udf_warn(sb
, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1034 udf_err(sb
, "bitmap inode efe not found and attempted read-write mount\n");
1038 mdata
->s_bitmap_fe
= fe
;
1041 udf_debug("udf_load_metadata_files Ok\n");
1045 static void udf_load_fileset(struct super_block
*sb
, struct buffer_head
*bh
,
1046 struct kernel_lb_addr
*root
)
1048 struct fileSetDesc
*fset
;
1050 fset
= (struct fileSetDesc
*)bh
->b_data
;
1052 *root
= lelb_to_cpu(fset
->rootDirectoryICB
.extLocation
);
1054 UDF_SB(sb
)->s_serial_number
= le16_to_cpu(fset
->descTag
.tagSerialNum
);
1056 udf_debug("Rootdir at block=%d, partition=%d\n",
1057 root
->logicalBlockNum
, root
->partitionReferenceNum
);
1060 int udf_compute_nr_groups(struct super_block
*sb
, u32 partition
)
1062 struct udf_part_map
*map
= &UDF_SB(sb
)->s_partmaps
[partition
];
1063 return DIV_ROUND_UP(map
->s_partition_len
+
1064 (sizeof(struct spaceBitmapDesc
) << 3),
1065 sb
->s_blocksize
* 8);
1068 static struct udf_bitmap
*udf_sb_alloc_bitmap(struct super_block
*sb
, u32 index
)
1070 struct udf_bitmap
*bitmap
;
1074 nr_groups
= udf_compute_nr_groups(sb
, index
);
1075 size
= sizeof(struct udf_bitmap
) +
1076 (sizeof(struct buffer_head
*) * nr_groups
);
1078 if (size
<= PAGE_SIZE
)
1079 bitmap
= kzalloc(size
, GFP_KERNEL
);
1081 bitmap
= vzalloc(size
); /* TODO: get rid of vzalloc */
1086 bitmap
->s_nr_groups
= nr_groups
;
1090 static int udf_fill_partdesc_info(struct super_block
*sb
,
1091 struct partitionDesc
*p
, int p_index
)
1093 struct udf_part_map
*map
;
1094 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1095 struct partitionHeaderDesc
*phd
;
1097 map
= &sbi
->s_partmaps
[p_index
];
1099 map
->s_partition_len
= le32_to_cpu(p
->partitionLength
); /* blocks */
1100 map
->s_partition_root
= le32_to_cpu(p
->partitionStartingLocation
);
1102 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY
))
1103 map
->s_partition_flags
|= UDF_PART_FLAG_READ_ONLY
;
1104 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE
))
1105 map
->s_partition_flags
|= UDF_PART_FLAG_WRITE_ONCE
;
1106 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE
))
1107 map
->s_partition_flags
|= UDF_PART_FLAG_REWRITABLE
;
1108 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE
))
1109 map
->s_partition_flags
|= UDF_PART_FLAG_OVERWRITABLE
;
1111 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1112 p_index
, map
->s_partition_type
,
1113 map
->s_partition_root
, map
->s_partition_len
);
1115 if (strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR02
) &&
1116 strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR03
))
1119 phd
= (struct partitionHeaderDesc
*)p
->partitionContentsUse
;
1120 if (phd
->unallocSpaceTable
.extLength
) {
1121 struct kernel_lb_addr loc
= {
1122 .logicalBlockNum
= le32_to_cpu(
1123 phd
->unallocSpaceTable
.extPosition
),
1124 .partitionReferenceNum
= p_index
,
1126 struct inode
*inode
;
1128 inode
= udf_iget_special(sb
, &loc
);
1129 if (IS_ERR(inode
)) {
1130 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1132 return PTR_ERR(inode
);
1134 map
->s_uspace
.s_table
= inode
;
1135 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_TABLE
;
1136 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1137 p_index
, map
->s_uspace
.s_table
->i_ino
);
1140 if (phd
->unallocSpaceBitmap
.extLength
) {
1141 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1144 map
->s_uspace
.s_bitmap
= bitmap
;
1145 bitmap
->s_extPosition
= le32_to_cpu(
1146 phd
->unallocSpaceBitmap
.extPosition
);
1147 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_BITMAP
;
1148 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1149 p_index
, bitmap
->s_extPosition
);
1152 if (phd
->partitionIntegrityTable
.extLength
)
1153 udf_debug("partitionIntegrityTable (part %d)\n", p_index
);
1155 if (phd
->freedSpaceTable
.extLength
) {
1156 struct kernel_lb_addr loc
= {
1157 .logicalBlockNum
= le32_to_cpu(
1158 phd
->freedSpaceTable
.extPosition
),
1159 .partitionReferenceNum
= p_index
,
1161 struct inode
*inode
;
1163 inode
= udf_iget_special(sb
, &loc
);
1164 if (IS_ERR(inode
)) {
1165 udf_debug("cannot load freedSpaceTable (part %d)\n",
1167 return PTR_ERR(inode
);
1169 map
->s_fspace
.s_table
= inode
;
1170 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_TABLE
;
1171 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1172 p_index
, map
->s_fspace
.s_table
->i_ino
);
1175 if (phd
->freedSpaceBitmap
.extLength
) {
1176 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1179 map
->s_fspace
.s_bitmap
= bitmap
;
1180 bitmap
->s_extPosition
= le32_to_cpu(
1181 phd
->freedSpaceBitmap
.extPosition
);
1182 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_BITMAP
;
1183 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1184 p_index
, bitmap
->s_extPosition
);
1189 static void udf_find_vat_block(struct super_block
*sb
, int p_index
,
1190 int type1_index
, sector_t start_block
)
1192 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1193 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1195 struct kernel_lb_addr ino
;
1196 struct inode
*inode
;
1199 * VAT file entry is in the last recorded block. Some broken disks have
1200 * it a few blocks before so try a bit harder...
1202 ino
.partitionReferenceNum
= type1_index
;
1203 for (vat_block
= start_block
;
1204 vat_block
>= map
->s_partition_root
&&
1205 vat_block
>= start_block
- 3; vat_block
--) {
1206 ino
.logicalBlockNum
= vat_block
- map
->s_partition_root
;
1207 inode
= udf_iget_special(sb
, &ino
);
1208 if (!IS_ERR(inode
)) {
1209 sbi
->s_vat_inode
= inode
;
1215 static int udf_load_vat(struct super_block
*sb
, int p_index
, int type1_index
)
1217 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1218 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1219 struct buffer_head
*bh
= NULL
;
1220 struct udf_inode_info
*vati
;
1222 struct virtualAllocationTable20
*vat20
;
1223 sector_t blocks
= sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
;
1225 udf_find_vat_block(sb
, p_index
, type1_index
, sbi
->s_last_block
);
1226 if (!sbi
->s_vat_inode
&&
1227 sbi
->s_last_block
!= blocks
- 1) {
1228 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1229 (unsigned long)sbi
->s_last_block
,
1230 (unsigned long)blocks
- 1);
1231 udf_find_vat_block(sb
, p_index
, type1_index
, blocks
- 1);
1233 if (!sbi
->s_vat_inode
)
1236 if (map
->s_partition_type
== UDF_VIRTUAL_MAP15
) {
1237 map
->s_type_specific
.s_virtual
.s_start_offset
= 0;
1238 map
->s_type_specific
.s_virtual
.s_num_entries
=
1239 (sbi
->s_vat_inode
->i_size
- 36) >> 2;
1240 } else if (map
->s_partition_type
== UDF_VIRTUAL_MAP20
) {
1241 vati
= UDF_I(sbi
->s_vat_inode
);
1242 if (vati
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
1243 pos
= udf_block_map(sbi
->s_vat_inode
, 0);
1244 bh
= sb_bread(sb
, pos
);
1247 vat20
= (struct virtualAllocationTable20
*)bh
->b_data
;
1249 vat20
= (struct virtualAllocationTable20
*)
1253 map
->s_type_specific
.s_virtual
.s_start_offset
=
1254 le16_to_cpu(vat20
->lengthHeader
);
1255 map
->s_type_specific
.s_virtual
.s_num_entries
=
1256 (sbi
->s_vat_inode
->i_size
-
1257 map
->s_type_specific
.s_virtual
.
1258 s_start_offset
) >> 2;
1265 * Load partition descriptor block
1267 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1270 static int udf_load_partdesc(struct super_block
*sb
, sector_t block
)
1272 struct buffer_head
*bh
;
1273 struct partitionDesc
*p
;
1274 struct udf_part_map
*map
;
1275 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1277 uint16_t partitionNumber
;
1281 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1284 if (ident
!= TAG_IDENT_PD
) {
1289 p
= (struct partitionDesc
*)bh
->b_data
;
1290 partitionNumber
= le16_to_cpu(p
->partitionNumber
);
1292 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1293 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1294 map
= &sbi
->s_partmaps
[i
];
1295 udf_debug("Searching map: (%d == %d)\n",
1296 map
->s_partition_num
, partitionNumber
);
1297 if (map
->s_partition_num
== partitionNumber
&&
1298 (map
->s_partition_type
== UDF_TYPE1_MAP15
||
1299 map
->s_partition_type
== UDF_SPARABLE_MAP15
))
1303 if (i
>= sbi
->s_partitions
) {
1304 udf_debug("Partition (%d) not found in partition map\n",
1310 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1315 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1316 * PHYSICAL partitions are already set up
1320 map
= NULL
; /* supress 'maybe used uninitialized' warning */
1322 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1323 map
= &sbi
->s_partmaps
[i
];
1325 if (map
->s_partition_num
== partitionNumber
&&
1326 (map
->s_partition_type
== UDF_VIRTUAL_MAP15
||
1327 map
->s_partition_type
== UDF_VIRTUAL_MAP20
||
1328 map
->s_partition_type
== UDF_METADATA_MAP25
))
1332 if (i
>= sbi
->s_partitions
) {
1337 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1341 if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
1342 ret
= udf_load_metadata_files(sb
, i
);
1344 udf_err(sb
, "error loading MetaData partition map %d\n",
1350 * If we have a partition with virtual map, we don't handle
1351 * writing to it (we overwrite blocks instead of relocating
1354 if (!(sb
->s_flags
& MS_RDONLY
)) {
1358 ret
= udf_load_vat(sb
, i
, type1_idx
);
1364 /* In case loading failed, we handle cleanup in udf_fill_super */
1369 static int udf_load_sparable_map(struct super_block
*sb
,
1370 struct udf_part_map
*map
,
1371 struct sparablePartitionMap
*spm
)
1375 struct sparingTable
*st
;
1376 struct udf_sparing_data
*sdata
= &map
->s_type_specific
.s_sparing
;
1378 struct buffer_head
*bh
;
1380 map
->s_partition_type
= UDF_SPARABLE_MAP15
;
1381 sdata
->s_packet_len
= le16_to_cpu(spm
->packetLength
);
1382 if (!is_power_of_2(sdata
->s_packet_len
)) {
1383 udf_err(sb
, "error loading logical volume descriptor: "
1384 "Invalid packet length %u\n",
1385 (unsigned)sdata
->s_packet_len
);
1388 if (spm
->numSparingTables
> 4) {
1389 udf_err(sb
, "error loading logical volume descriptor: "
1390 "Too many sparing tables (%d)\n",
1391 (int)spm
->numSparingTables
);
1395 for (i
= 0; i
< spm
->numSparingTables
; i
++) {
1396 loc
= le32_to_cpu(spm
->locSparingTable
[i
]);
1397 bh
= udf_read_tagged(sb
, loc
, loc
, &ident
);
1401 st
= (struct sparingTable
*)bh
->b_data
;
1403 strncmp(st
->sparingIdent
.ident
, UDF_ID_SPARING
,
1404 strlen(UDF_ID_SPARING
)) ||
1405 sizeof(*st
) + le16_to_cpu(st
->reallocationTableLen
) >
1411 sdata
->s_spar_map
[i
] = bh
;
1413 map
->s_partition_func
= udf_get_pblock_spar15
;
1417 static int udf_load_logicalvol(struct super_block
*sb
, sector_t block
,
1418 struct kernel_lb_addr
*fileset
)
1420 struct logicalVolDesc
*lvd
;
1423 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1424 struct genericPartitionMap
*gpm
;
1426 struct buffer_head
*bh
;
1427 unsigned int table_len
;
1430 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1433 BUG_ON(ident
!= TAG_IDENT_LVD
);
1434 lvd
= (struct logicalVolDesc
*)bh
->b_data
;
1435 table_len
= le32_to_cpu(lvd
->mapTableLength
);
1436 if (table_len
> sb
->s_blocksize
- sizeof(*lvd
)) {
1437 udf_err(sb
, "error loading logical volume descriptor: "
1438 "Partition table too long (%u > %lu)\n", table_len
,
1439 sb
->s_blocksize
- sizeof(*lvd
));
1444 ret
= udf_sb_alloc_partition_maps(sb
, le32_to_cpu(lvd
->numPartitionMaps
));
1448 for (i
= 0, offset
= 0;
1449 i
< sbi
->s_partitions
&& offset
< table_len
;
1450 i
++, offset
+= gpm
->partitionMapLength
) {
1451 struct udf_part_map
*map
= &sbi
->s_partmaps
[i
];
1452 gpm
= (struct genericPartitionMap
*)
1453 &(lvd
->partitionMaps
[offset
]);
1454 type
= gpm
->partitionMapType
;
1456 struct genericPartitionMap1
*gpm1
=
1457 (struct genericPartitionMap1
*)gpm
;
1458 map
->s_partition_type
= UDF_TYPE1_MAP15
;
1459 map
->s_volumeseqnum
= le16_to_cpu(gpm1
->volSeqNum
);
1460 map
->s_partition_num
= le16_to_cpu(gpm1
->partitionNum
);
1461 map
->s_partition_func
= NULL
;
1462 } else if (type
== 2) {
1463 struct udfPartitionMap2
*upm2
=
1464 (struct udfPartitionMap2
*)gpm
;
1465 if (!strncmp(upm2
->partIdent
.ident
, UDF_ID_VIRTUAL
,
1466 strlen(UDF_ID_VIRTUAL
))) {
1468 le16_to_cpu(((__le16
*)upm2
->partIdent
.
1471 map
->s_partition_type
=
1473 map
->s_partition_func
=
1474 udf_get_pblock_virt15
;
1476 map
->s_partition_type
=
1478 map
->s_partition_func
=
1479 udf_get_pblock_virt20
;
1481 } else if (!strncmp(upm2
->partIdent
.ident
,
1483 strlen(UDF_ID_SPARABLE
))) {
1484 ret
= udf_load_sparable_map(sb
, map
,
1485 (struct sparablePartitionMap
*)gpm
);
1488 } else if (!strncmp(upm2
->partIdent
.ident
,
1490 strlen(UDF_ID_METADATA
))) {
1491 struct udf_meta_data
*mdata
=
1492 &map
->s_type_specific
.s_metadata
;
1493 struct metadataPartitionMap
*mdm
=
1494 (struct metadataPartitionMap
*)
1495 &(lvd
->partitionMaps
[offset
]);
1496 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1497 i
, type
, UDF_ID_METADATA
);
1499 map
->s_partition_type
= UDF_METADATA_MAP25
;
1500 map
->s_partition_func
= udf_get_pblock_meta25
;
1502 mdata
->s_meta_file_loc
=
1503 le32_to_cpu(mdm
->metadataFileLoc
);
1504 mdata
->s_mirror_file_loc
=
1505 le32_to_cpu(mdm
->metadataMirrorFileLoc
);
1506 mdata
->s_bitmap_file_loc
=
1507 le32_to_cpu(mdm
->metadataBitmapFileLoc
);
1508 mdata
->s_alloc_unit_size
=
1509 le32_to_cpu(mdm
->allocUnitSize
);
1510 mdata
->s_align_unit_size
=
1511 le16_to_cpu(mdm
->alignUnitSize
);
1512 if (mdm
->flags
& 0x01)
1513 mdata
->s_flags
|= MF_DUPLICATE_MD
;
1515 udf_debug("Metadata Ident suffix=0x%x\n",
1516 le16_to_cpu(*(__le16
*)
1517 mdm
->partIdent
.identSuffix
));
1518 udf_debug("Metadata part num=%d\n",
1519 le16_to_cpu(mdm
->partitionNum
));
1520 udf_debug("Metadata part alloc unit size=%d\n",
1521 le32_to_cpu(mdm
->allocUnitSize
));
1522 udf_debug("Metadata file loc=%d\n",
1523 le32_to_cpu(mdm
->metadataFileLoc
));
1524 udf_debug("Mirror file loc=%d\n",
1525 le32_to_cpu(mdm
->metadataMirrorFileLoc
));
1526 udf_debug("Bitmap file loc=%d\n",
1527 le32_to_cpu(mdm
->metadataBitmapFileLoc
));
1528 udf_debug("Flags: %d %d\n",
1529 mdata
->s_flags
, mdm
->flags
);
1531 udf_debug("Unknown ident: %s\n",
1532 upm2
->partIdent
.ident
);
1535 map
->s_volumeseqnum
= le16_to_cpu(upm2
->volSeqNum
);
1536 map
->s_partition_num
= le16_to_cpu(upm2
->partitionNum
);
1538 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1539 i
, map
->s_partition_num
, type
, map
->s_volumeseqnum
);
1543 struct long_ad
*la
= (struct long_ad
*)&(lvd
->logicalVolContentsUse
[0]);
1545 *fileset
= lelb_to_cpu(la
->extLocation
);
1546 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1547 fileset
->logicalBlockNum
,
1548 fileset
->partitionReferenceNum
);
1550 if (lvd
->integritySeqExt
.extLength
)
1551 udf_load_logicalvolint(sb
, leea_to_cpu(lvd
->integritySeqExt
));
1559 * udf_load_logicalvolint
1562 static void udf_load_logicalvolint(struct super_block
*sb
, struct kernel_extent_ad loc
)
1564 struct buffer_head
*bh
= NULL
;
1566 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1567 struct logicalVolIntegrityDesc
*lvid
;
1569 while (loc
.extLength
> 0 &&
1570 (bh
= udf_read_tagged(sb
, loc
.extLocation
,
1571 loc
.extLocation
, &ident
)) &&
1572 ident
== TAG_IDENT_LVID
) {
1573 sbi
->s_lvid_bh
= bh
;
1574 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1576 if (lvid
->nextIntegrityExt
.extLength
)
1577 udf_load_logicalvolint(sb
,
1578 leea_to_cpu(lvid
->nextIntegrityExt
));
1580 if (sbi
->s_lvid_bh
!= bh
)
1582 loc
.extLength
-= sb
->s_blocksize
;
1585 if (sbi
->s_lvid_bh
!= bh
)
1590 * Maximum number of Terminating Descriptor redirections. The chosen number is
1591 * arbitrary - just that we hopefully don't limit any real use of rewritten
1592 * inode on write-once media but avoid looping for too long on corrupted media.
1594 #define UDF_MAX_TD_NESTING 64
1597 * Process a main/reserve volume descriptor sequence.
1598 * @block First block of first extent of the sequence.
1599 * @lastblock Lastblock of first extent of the sequence.
1600 * @fileset There we store extent containing root fileset
1602 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1605 static noinline
int udf_process_sequence(
1606 struct super_block
*sb
,
1607 sector_t block
, sector_t lastblock
,
1608 struct kernel_lb_addr
*fileset
)
1610 struct buffer_head
*bh
= NULL
;
1611 struct udf_vds_record vds
[VDS_POS_LENGTH
];
1612 struct udf_vds_record
*curr
;
1613 struct generic_desc
*gd
;
1614 struct volDescPtr
*vdp
;
1618 long next_s
= 0, next_e
= 0;
1620 unsigned int indirections
= 0;
1622 memset(vds
, 0, sizeof(struct udf_vds_record
) * VDS_POS_LENGTH
);
1625 * Read the main descriptor sequence and find which descriptors
1628 for (; (!done
&& block
<= lastblock
); block
++) {
1630 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1633 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1634 (unsigned long long)block
);
1638 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1639 gd
= (struct generic_desc
*)bh
->b_data
;
1640 vdsn
= le32_to_cpu(gd
->volDescSeqNum
);
1642 case TAG_IDENT_PVD
: /* ISO 13346 3/10.1 */
1643 curr
= &vds
[VDS_POS_PRIMARY_VOL_DESC
];
1644 if (vdsn
>= curr
->volDescSeqNum
) {
1645 curr
->volDescSeqNum
= vdsn
;
1646 curr
->block
= block
;
1649 case TAG_IDENT_VDP
: /* ISO 13346 3/10.3 */
1650 curr
= &vds
[VDS_POS_VOL_DESC_PTR
];
1651 if (vdsn
>= curr
->volDescSeqNum
) {
1652 curr
->volDescSeqNum
= vdsn
;
1653 curr
->block
= block
;
1655 vdp
= (struct volDescPtr
*)bh
->b_data
;
1656 next_s
= le32_to_cpu(
1657 vdp
->nextVolDescSeqExt
.extLocation
);
1658 next_e
= le32_to_cpu(
1659 vdp
->nextVolDescSeqExt
.extLength
);
1660 next_e
= next_e
>> sb
->s_blocksize_bits
;
1664 case TAG_IDENT_IUVD
: /* ISO 13346 3/10.4 */
1665 curr
= &vds
[VDS_POS_IMP_USE_VOL_DESC
];
1666 if (vdsn
>= curr
->volDescSeqNum
) {
1667 curr
->volDescSeqNum
= vdsn
;
1668 curr
->block
= block
;
1671 case TAG_IDENT_PD
: /* ISO 13346 3/10.5 */
1672 curr
= &vds
[VDS_POS_PARTITION_DESC
];
1674 curr
->block
= block
;
1676 case TAG_IDENT_LVD
: /* ISO 13346 3/10.6 */
1677 curr
= &vds
[VDS_POS_LOGICAL_VOL_DESC
];
1678 if (vdsn
>= curr
->volDescSeqNum
) {
1679 curr
->volDescSeqNum
= vdsn
;
1680 curr
->block
= block
;
1683 case TAG_IDENT_USD
: /* ISO 13346 3/10.8 */
1684 curr
= &vds
[VDS_POS_UNALLOC_SPACE_DESC
];
1685 if (vdsn
>= curr
->volDescSeqNum
) {
1686 curr
->volDescSeqNum
= vdsn
;
1687 curr
->block
= block
;
1690 case TAG_IDENT_TD
: /* ISO 13346 3/10.9 */
1691 if (++indirections
> UDF_MAX_TD_NESTING
) {
1692 udf_err(sb
, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING
);
1697 vds
[VDS_POS_TERMINATING_DESC
].block
= block
;
1701 next_s
= next_e
= 0;
1709 * Now read interesting descriptors again and process them
1710 * in a suitable order
1712 if (!vds
[VDS_POS_PRIMARY_VOL_DESC
].block
) {
1713 udf_err(sb
, "Primary Volume Descriptor not found!\n");
1716 ret
= udf_load_pvoldesc(sb
, vds
[VDS_POS_PRIMARY_VOL_DESC
].block
);
1720 if (vds
[VDS_POS_LOGICAL_VOL_DESC
].block
) {
1721 ret
= udf_load_logicalvol(sb
,
1722 vds
[VDS_POS_LOGICAL_VOL_DESC
].block
,
1728 if (vds
[VDS_POS_PARTITION_DESC
].block
) {
1730 * We rescan the whole descriptor sequence to find
1731 * partition descriptor blocks and process them.
1733 for (block
= vds
[VDS_POS_PARTITION_DESC
].block
;
1734 block
< vds
[VDS_POS_TERMINATING_DESC
].block
;
1736 ret
= udf_load_partdesc(sb
, block
);
1746 * Load Volume Descriptor Sequence described by anchor in bh
1748 * Returns <0 on error, 0 on success
1750 static int udf_load_sequence(struct super_block
*sb
, struct buffer_head
*bh
,
1751 struct kernel_lb_addr
*fileset
)
1753 struct anchorVolDescPtr
*anchor
;
1754 sector_t main_s
, main_e
, reserve_s
, reserve_e
;
1757 anchor
= (struct anchorVolDescPtr
*)bh
->b_data
;
1759 /* Locate the main sequence */
1760 main_s
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLocation
);
1761 main_e
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLength
);
1762 main_e
= main_e
>> sb
->s_blocksize_bits
;
1765 /* Locate the reserve sequence */
1766 reserve_s
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLocation
);
1767 reserve_e
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLength
);
1768 reserve_e
= reserve_e
>> sb
->s_blocksize_bits
;
1769 reserve_e
+= reserve_s
;
1771 /* Process the main & reserve sequences */
1772 /* responsible for finding the PartitionDesc(s) */
1773 ret
= udf_process_sequence(sb
, main_s
, main_e
, fileset
);
1776 udf_sb_free_partitions(sb
);
1777 ret
= udf_process_sequence(sb
, reserve_s
, reserve_e
, fileset
);
1779 udf_sb_free_partitions(sb
);
1780 /* No sequence was OK, return -EIO */
1788 * Check whether there is an anchor block in the given block and
1789 * load Volume Descriptor Sequence if so.
1791 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1794 static int udf_check_anchor_block(struct super_block
*sb
, sector_t block
,
1795 struct kernel_lb_addr
*fileset
)
1797 struct buffer_head
*bh
;
1801 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_VARCONV
) &&
1802 udf_fixed_to_variable(block
) >=
1803 sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
)
1806 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1809 if (ident
!= TAG_IDENT_AVDP
) {
1813 ret
= udf_load_sequence(sb
, bh
, fileset
);
1819 * Search for an anchor volume descriptor pointer.
1821 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1824 static int udf_scan_anchors(struct super_block
*sb
, sector_t
*lastblock
,
1825 struct kernel_lb_addr
*fileset
)
1829 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1833 /* First try user provided anchor */
1834 if (sbi
->s_anchor
) {
1835 ret
= udf_check_anchor_block(sb
, sbi
->s_anchor
, fileset
);
1840 * according to spec, anchor is in either:
1844 * however, if the disc isn't closed, it could be 512.
1846 ret
= udf_check_anchor_block(sb
, sbi
->s_session
+ 256, fileset
);
1850 * The trouble is which block is the last one. Drives often misreport
1851 * this so we try various possibilities.
1853 last
[last_count
++] = *lastblock
;
1854 if (*lastblock
>= 1)
1855 last
[last_count
++] = *lastblock
- 1;
1856 last
[last_count
++] = *lastblock
+ 1;
1857 if (*lastblock
>= 2)
1858 last
[last_count
++] = *lastblock
- 2;
1859 if (*lastblock
>= 150)
1860 last
[last_count
++] = *lastblock
- 150;
1861 if (*lastblock
>= 152)
1862 last
[last_count
++] = *lastblock
- 152;
1864 for (i
= 0; i
< last_count
; i
++) {
1865 if (last
[i
] >= sb
->s_bdev
->bd_inode
->i_size
>>
1866 sb
->s_blocksize_bits
)
1868 ret
= udf_check_anchor_block(sb
, last
[i
], fileset
);
1869 if (ret
!= -EAGAIN
) {
1871 *lastblock
= last
[i
];
1876 ret
= udf_check_anchor_block(sb
, last
[i
] - 256, fileset
);
1877 if (ret
!= -EAGAIN
) {
1879 *lastblock
= last
[i
];
1884 /* Finally try block 512 in case media is open */
1885 return udf_check_anchor_block(sb
, sbi
->s_session
+ 512, fileset
);
1889 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1890 * area specified by it. The function expects sbi->s_lastblock to be the last
1891 * block on the media.
1893 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1896 static int udf_find_anchor(struct super_block
*sb
,
1897 struct kernel_lb_addr
*fileset
)
1899 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1900 sector_t lastblock
= sbi
->s_last_block
;
1903 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1907 /* No anchor found? Try VARCONV conversion of block numbers */
1908 UDF_SET_FLAG(sb
, UDF_FLAG_VARCONV
);
1909 lastblock
= udf_variable_to_fixed(sbi
->s_last_block
);
1910 /* Firstly, we try to not convert number of the last block */
1911 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1915 lastblock
= sbi
->s_last_block
;
1916 /* Secondly, we try with converted number of the last block */
1917 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1919 /* VARCONV didn't help. Clear it. */
1920 UDF_CLEAR_FLAG(sb
, UDF_FLAG_VARCONV
);
1924 sbi
->s_last_block
= lastblock
;
1929 * Check Volume Structure Descriptor, find Anchor block and load Volume
1930 * Descriptor Sequence.
1932 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1933 * block was not found.
1935 static int udf_load_vrs(struct super_block
*sb
, struct udf_options
*uopt
,
1936 int silent
, struct kernel_lb_addr
*fileset
)
1938 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1942 if (!sb_set_blocksize(sb
, uopt
->blocksize
)) {
1944 udf_warn(sb
, "Bad block size\n");
1947 sbi
->s_last_block
= uopt
->lastblock
;
1949 /* Check that it is NSR02 compliant */
1950 nsr_off
= udf_check_vsd(sb
);
1953 udf_warn(sb
, "No VRS found\n");
1957 udf_debug("Failed to read sector at offset %d. "
1958 "Assuming open disc. Skipping validity "
1959 "check\n", VSD_FIRST_SECTOR_OFFSET
);
1960 if (!sbi
->s_last_block
)
1961 sbi
->s_last_block
= udf_get_last_block(sb
);
1963 udf_debug("Validity check skipped because of novrs option\n");
1966 /* Look for anchor block and load Volume Descriptor Sequence */
1967 sbi
->s_anchor
= uopt
->anchor
;
1968 ret
= udf_find_anchor(sb
, fileset
);
1970 if (!silent
&& ret
== -EAGAIN
)
1971 udf_warn(sb
, "No anchor found\n");
1977 static void udf_open_lvid(struct super_block
*sb
)
1979 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1980 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1981 struct logicalVolIntegrityDesc
*lvid
;
1982 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1986 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1987 lvidiu
= udf_sb_lvidiu(sb
);
1991 mutex_lock(&sbi
->s_alloc_mutex
);
1992 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1993 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1994 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
,
1996 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN
);
1998 lvid
->descTag
.descCRC
= cpu_to_le16(
1999 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
2000 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
2002 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
2003 mark_buffer_dirty(bh
);
2004 sbi
->s_lvid_dirty
= 0;
2005 mutex_unlock(&sbi
->s_alloc_mutex
);
2006 /* Make opening of filesystem visible on the media immediately */
2007 sync_dirty_buffer(bh
);
2010 static void udf_close_lvid(struct super_block
*sb
)
2012 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2013 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
2014 struct logicalVolIntegrityDesc
*lvid
;
2015 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2019 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2020 lvidiu
= udf_sb_lvidiu(sb
);
2024 mutex_lock(&sbi
->s_alloc_mutex
);
2025 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
2026 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
2027 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, CURRENT_TIME
);
2028 if (UDF_MAX_WRITE_VERSION
> le16_to_cpu(lvidiu
->maxUDFWriteRev
))
2029 lvidiu
->maxUDFWriteRev
= cpu_to_le16(UDF_MAX_WRITE_VERSION
);
2030 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFReadRev
))
2031 lvidiu
->minUDFReadRev
= cpu_to_le16(sbi
->s_udfrev
);
2032 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFWriteRev
))
2033 lvidiu
->minUDFWriteRev
= cpu_to_le16(sbi
->s_udfrev
);
2034 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE
);
2036 lvid
->descTag
.descCRC
= cpu_to_le16(
2037 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
2038 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
2040 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
2042 * We set buffer uptodate unconditionally here to avoid spurious
2043 * warnings from mark_buffer_dirty() when previous EIO has marked
2044 * the buffer as !uptodate
2046 set_buffer_uptodate(bh
);
2047 mark_buffer_dirty(bh
);
2048 sbi
->s_lvid_dirty
= 0;
2049 mutex_unlock(&sbi
->s_alloc_mutex
);
2050 /* Make closing of filesystem visible on the media immediately */
2051 sync_dirty_buffer(bh
);
2054 u64
lvid_get_unique_id(struct super_block
*sb
)
2056 struct buffer_head
*bh
;
2057 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2058 struct logicalVolIntegrityDesc
*lvid
;
2059 struct logicalVolHeaderDesc
*lvhd
;
2063 bh
= sbi
->s_lvid_bh
;
2067 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2068 lvhd
= (struct logicalVolHeaderDesc
*)lvid
->logicalVolContentsUse
;
2070 mutex_lock(&sbi
->s_alloc_mutex
);
2071 ret
= uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
2072 if (!(++uniqueID
& 0xFFFFFFFF))
2074 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
2075 mutex_unlock(&sbi
->s_alloc_mutex
);
2076 mark_buffer_dirty(bh
);
2081 static int udf_fill_super(struct super_block
*sb
, void *options
, int silent
)
2084 struct inode
*inode
= NULL
;
2085 struct udf_options uopt
;
2086 struct kernel_lb_addr rootdir
, fileset
;
2087 struct udf_sb_info
*sbi
;
2088 bool lvid_open
= false;
2090 uopt
.flags
= (1 << UDF_FLAG_USE_AD_IN_ICB
) | (1 << UDF_FLAG_STRICT
);
2091 uopt
.uid
= INVALID_UID
;
2092 uopt
.gid
= INVALID_GID
;
2094 uopt
.fmode
= UDF_INVALID_MODE
;
2095 uopt
.dmode
= UDF_INVALID_MODE
;
2097 sbi
= kzalloc(sizeof(struct udf_sb_info
), GFP_KERNEL
);
2101 sb
->s_fs_info
= sbi
;
2103 mutex_init(&sbi
->s_alloc_mutex
);
2105 if (!udf_parse_options((char *)options
, &uopt
, false))
2106 goto parse_options_failure
;
2108 if (uopt
.flags
& (1 << UDF_FLAG_UTF8
) &&
2109 uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) {
2110 udf_err(sb
, "utf8 cannot be combined with iocharset\n");
2111 goto parse_options_failure
;
2113 #ifdef CONFIG_UDF_NLS
2114 if ((uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) && !uopt
.nls_map
) {
2115 uopt
.nls_map
= load_nls_default();
2117 uopt
.flags
&= ~(1 << UDF_FLAG_NLS_MAP
);
2119 udf_debug("Using default NLS map\n");
2122 if (!(uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)))
2123 uopt
.flags
|= (1 << UDF_FLAG_UTF8
);
2125 fileset
.logicalBlockNum
= 0xFFFFFFFF;
2126 fileset
.partitionReferenceNum
= 0xFFFF;
2128 sbi
->s_flags
= uopt
.flags
;
2129 sbi
->s_uid
= uopt
.uid
;
2130 sbi
->s_gid
= uopt
.gid
;
2131 sbi
->s_umask
= uopt
.umask
;
2132 sbi
->s_fmode
= uopt
.fmode
;
2133 sbi
->s_dmode
= uopt
.dmode
;
2134 sbi
->s_nls_map
= uopt
.nls_map
;
2135 rwlock_init(&sbi
->s_cred_lock
);
2137 if (uopt
.session
== 0xFFFFFFFF)
2138 sbi
->s_session
= udf_get_last_session(sb
);
2140 sbi
->s_session
= uopt
.session
;
2142 udf_debug("Multi-session=%d\n", sbi
->s_session
);
2144 /* Fill in the rest of the superblock */
2145 sb
->s_op
= &udf_sb_ops
;
2146 sb
->s_export_op
= &udf_export_ops
;
2148 sb
->s_magic
= UDF_SUPER_MAGIC
;
2149 sb
->s_time_gran
= 1000;
2151 if (uopt
.flags
& (1 << UDF_FLAG_BLOCKSIZE_SET
)) {
2152 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2154 uopt
.blocksize
= bdev_logical_block_size(sb
->s_bdev
);
2155 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2156 if (ret
== -EAGAIN
&& uopt
.blocksize
!= UDF_DEFAULT_BLOCKSIZE
) {
2158 pr_notice("Rescanning with blocksize %d\n",
2159 UDF_DEFAULT_BLOCKSIZE
);
2160 brelse(sbi
->s_lvid_bh
);
2161 sbi
->s_lvid_bh
= NULL
;
2162 uopt
.blocksize
= UDF_DEFAULT_BLOCKSIZE
;
2163 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2167 if (ret
== -EAGAIN
) {
2168 udf_warn(sb
, "No partition found (1)\n");
2174 udf_debug("Lastblock=%d\n", sbi
->s_last_block
);
2176 if (sbi
->s_lvid_bh
) {
2177 struct logicalVolIntegrityDescImpUse
*lvidiu
=
2179 uint16_t minUDFReadRev
;
2180 uint16_t minUDFWriteRev
;
2186 minUDFReadRev
= le16_to_cpu(lvidiu
->minUDFReadRev
);
2187 minUDFWriteRev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
2188 if (minUDFReadRev
> UDF_MAX_READ_VERSION
) {
2189 udf_err(sb
, "minUDFReadRev=%x (max is %x)\n",
2191 UDF_MAX_READ_VERSION
);
2194 } else if (minUDFWriteRev
> UDF_MAX_WRITE_VERSION
&&
2195 !(sb
->s_flags
& MS_RDONLY
)) {
2200 sbi
->s_udfrev
= minUDFWriteRev
;
2202 if (minUDFReadRev
>= UDF_VERS_USE_EXTENDED_FE
)
2203 UDF_SET_FLAG(sb
, UDF_FLAG_USE_EXTENDED_FE
);
2204 if (minUDFReadRev
>= UDF_VERS_USE_STREAMS
)
2205 UDF_SET_FLAG(sb
, UDF_FLAG_USE_STREAMS
);
2208 if (!sbi
->s_partitions
) {
2209 udf_warn(sb
, "No partition found (2)\n");
2214 if (sbi
->s_partmaps
[sbi
->s_partition
].s_partition_flags
&
2215 UDF_PART_FLAG_READ_ONLY
&&
2216 !(sb
->s_flags
& MS_RDONLY
)) {
2221 if (udf_find_fileset(sb
, &fileset
, &rootdir
)) {
2222 udf_warn(sb
, "No fileset found\n");
2228 struct timestamp ts
;
2229 udf_time_to_disk_stamp(&ts
, sbi
->s_record_time
);
2230 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2231 sbi
->s_volume_ident
,
2232 le16_to_cpu(ts
.year
), ts
.month
, ts
.day
,
2233 ts
.hour
, ts
.minute
, le16_to_cpu(ts
.typeAndTimezone
));
2235 if (!(sb
->s_flags
& MS_RDONLY
)) {
2240 /* Assign the root inode */
2241 /* assign inodes by physical block number */
2242 /* perhaps it's not extensible enough, but for now ... */
2243 inode
= udf_iget(sb
, &rootdir
);
2244 if (IS_ERR(inode
)) {
2245 udf_err(sb
, "Error in udf_iget, block=%d, partition=%d\n",
2246 rootdir
.logicalBlockNum
, rootdir
.partitionReferenceNum
);
2247 ret
= PTR_ERR(inode
);
2251 /* Allocate a dentry for the root inode */
2252 sb
->s_root
= d_make_root(inode
);
2254 udf_err(sb
, "Couldn't allocate root dentry\n");
2258 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
2259 sb
->s_max_links
= UDF_MAX_LINKS
;
2263 iput(sbi
->s_vat_inode
);
2264 parse_options_failure
:
2265 #ifdef CONFIG_UDF_NLS
2266 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2267 unload_nls(sbi
->s_nls_map
);
2271 brelse(sbi
->s_lvid_bh
);
2272 udf_sb_free_partitions(sb
);
2274 sb
->s_fs_info
= NULL
;
2279 void _udf_err(struct super_block
*sb
, const char *function
,
2280 const char *fmt
, ...)
2282 struct va_format vaf
;
2285 va_start(args
, fmt
);
2290 pr_err("error (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2295 void _udf_warn(struct super_block
*sb
, const char *function
,
2296 const char *fmt
, ...)
2298 struct va_format vaf
;
2301 va_start(args
, fmt
);
2306 pr_warn("warning (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2311 static void udf_put_super(struct super_block
*sb
)
2313 struct udf_sb_info
*sbi
;
2317 iput(sbi
->s_vat_inode
);
2318 #ifdef CONFIG_UDF_NLS
2319 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2320 unload_nls(sbi
->s_nls_map
);
2322 if (!(sb
->s_flags
& MS_RDONLY
))
2324 brelse(sbi
->s_lvid_bh
);
2325 udf_sb_free_partitions(sb
);
2326 mutex_destroy(&sbi
->s_alloc_mutex
);
2327 kfree(sb
->s_fs_info
);
2328 sb
->s_fs_info
= NULL
;
2331 static int udf_sync_fs(struct super_block
*sb
, int wait
)
2333 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2335 mutex_lock(&sbi
->s_alloc_mutex
);
2336 if (sbi
->s_lvid_dirty
) {
2338 * Blockdevice will be synced later so we don't have to submit
2341 mark_buffer_dirty(sbi
->s_lvid_bh
);
2342 sbi
->s_lvid_dirty
= 0;
2344 mutex_unlock(&sbi
->s_alloc_mutex
);
2349 static int udf_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2351 struct super_block
*sb
= dentry
->d_sb
;
2352 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2353 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2354 u64 id
= huge_encode_dev(sb
->s_bdev
->bd_dev
);
2356 lvidiu
= udf_sb_lvidiu(sb
);
2357 buf
->f_type
= UDF_SUPER_MAGIC
;
2358 buf
->f_bsize
= sb
->s_blocksize
;
2359 buf
->f_blocks
= sbi
->s_partmaps
[sbi
->s_partition
].s_partition_len
;
2360 buf
->f_bfree
= udf_count_free(sb
);
2361 buf
->f_bavail
= buf
->f_bfree
;
2362 buf
->f_files
= (lvidiu
!= NULL
? (le32_to_cpu(lvidiu
->numFiles
) +
2363 le32_to_cpu(lvidiu
->numDirs
)) : 0)
2365 buf
->f_ffree
= buf
->f_bfree
;
2366 buf
->f_namelen
= UDF_NAME_LEN
- 2;
2367 buf
->f_fsid
.val
[0] = (u32
)id
;
2368 buf
->f_fsid
.val
[1] = (u32
)(id
>> 32);
2373 static unsigned int udf_count_free_bitmap(struct super_block
*sb
,
2374 struct udf_bitmap
*bitmap
)
2376 struct buffer_head
*bh
= NULL
;
2377 unsigned int accum
= 0;
2379 int block
= 0, newblock
;
2380 struct kernel_lb_addr loc
;
2384 struct spaceBitmapDesc
*bm
;
2386 loc
.logicalBlockNum
= bitmap
->s_extPosition
;
2387 loc
.partitionReferenceNum
= UDF_SB(sb
)->s_partition
;
2388 bh
= udf_read_ptagged(sb
, &loc
, 0, &ident
);
2391 udf_err(sb
, "udf_count_free failed\n");
2393 } else if (ident
!= TAG_IDENT_SBD
) {
2395 udf_err(sb
, "udf_count_free failed\n");
2399 bm
= (struct spaceBitmapDesc
*)bh
->b_data
;
2400 bytes
= le32_to_cpu(bm
->numOfBytes
);
2401 index
= sizeof(struct spaceBitmapDesc
); /* offset in first block only */
2402 ptr
= (uint8_t *)bh
->b_data
;
2405 u32 cur_bytes
= min_t(u32
, bytes
, sb
->s_blocksize
- index
);
2406 accum
+= bitmap_weight((const unsigned long *)(ptr
+ index
),
2411 newblock
= udf_get_lb_pblock(sb
, &loc
, ++block
);
2412 bh
= udf_tread(sb
, newblock
);
2414 udf_debug("read failed\n");
2418 ptr
= (uint8_t *)bh
->b_data
;
2426 static unsigned int udf_count_free_table(struct super_block
*sb
,
2427 struct inode
*table
)
2429 unsigned int accum
= 0;
2431 struct kernel_lb_addr eloc
;
2433 struct extent_position epos
;
2435 mutex_lock(&UDF_SB(sb
)->s_alloc_mutex
);
2436 epos
.block
= UDF_I(table
)->i_location
;
2437 epos
.offset
= sizeof(struct unallocSpaceEntry
);
2440 while ((etype
= udf_next_aext(table
, &epos
, &eloc
, &elen
, 1)) != -1)
2441 accum
+= (elen
>> table
->i_sb
->s_blocksize_bits
);
2444 mutex_unlock(&UDF_SB(sb
)->s_alloc_mutex
);
2449 static unsigned int udf_count_free(struct super_block
*sb
)
2451 unsigned int accum
= 0;
2452 struct udf_sb_info
*sbi
;
2453 struct udf_part_map
*map
;
2456 if (sbi
->s_lvid_bh
) {
2457 struct logicalVolIntegrityDesc
*lvid
=
2458 (struct logicalVolIntegrityDesc
*)
2459 sbi
->s_lvid_bh
->b_data
;
2460 if (le32_to_cpu(lvid
->numOfPartitions
) > sbi
->s_partition
) {
2461 accum
= le32_to_cpu(
2462 lvid
->freeSpaceTable
[sbi
->s_partition
]);
2463 if (accum
== 0xFFFFFFFF)
2471 map
= &sbi
->s_partmaps
[sbi
->s_partition
];
2472 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
) {
2473 accum
+= udf_count_free_bitmap(sb
,
2474 map
->s_uspace
.s_bitmap
);
2476 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
) {
2477 accum
+= udf_count_free_bitmap(sb
,
2478 map
->s_fspace
.s_bitmap
);
2483 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
) {
2484 accum
+= udf_count_free_table(sb
,
2485 map
->s_uspace
.s_table
);
2487 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
) {
2488 accum
+= udf_count_free_table(sb
,
2489 map
->s_fspace
.s_table
);