5 * Super block routines for the OSTA-UDF(tm) filesystem.
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
11 * This code is based on version 2.00 of the UDF specification,
12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
13 * http://www.osta.org/
18 * This file is distributed under the terms of the GNU General Public
19 * License (GPL). Copies of the GPL can be obtained from:
20 * ftp://prep.ai.mit.edu/pub/gnu/GPL
21 * Each contributing author retains all rights to their own work.
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
29 * 09/24/98 dgb changed to allow compiling outside of kernel, and
30 * added some debugging.
31 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
32 * 10/16/98 attempting some multi-session support
33 * 10/17/98 added freespace count for "df"
34 * 11/11/98 gr added novrs option
35 * 11/26/98 dgb added fileset,anchor mount options
36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
38 * 12/20/98 find the free space bitmap (if it exists)
43 #include <linux/blkdev.h>
44 #include <linux/slab.h>
45 #include <linux/kernel.h>
46 #include <linux/module.h>
47 #include <linux/parser.h>
48 #include <linux/stat.h>
49 #include <linux/cdrom.h>
50 #include <linux/nls.h>
51 #include <linux/buffer_head.h>
52 #include <linux/vfs.h>
53 #include <linux/vmalloc.h>
54 #include <linux/errno.h>
55 #include <linux/mount.h>
56 #include <linux/seq_file.h>
57 #include <linux/bitmap.h>
58 #include <linux/crc-itu-t.h>
59 #include <linux/log2.h>
60 #include <asm/byteorder.h>
65 #include <linux/init.h>
66 #include <asm/uaccess.h>
68 #define VDS_POS_PRIMARY_VOL_DESC 0
69 #define VDS_POS_UNALLOC_SPACE_DESC 1
70 #define VDS_POS_LOGICAL_VOL_DESC 2
71 #define VDS_POS_PARTITION_DESC 3
72 #define VDS_POS_IMP_USE_VOL_DESC 4
73 #define VDS_POS_VOL_DESC_PTR 5
74 #define VDS_POS_TERMINATING_DESC 6
75 #define VDS_POS_LENGTH 7
77 #define UDF_DEFAULT_BLOCKSIZE 2048
79 #define VSD_FIRST_SECTOR_OFFSET 32768
80 #define VSD_MAX_SECTOR_OFFSET 0x800000
82 enum { UDF_MAX_LINKS
= 0xffff };
84 /* These are the "meat" - everything else is stuffing */
85 static int udf_fill_super(struct super_block
*, void *, int);
86 static void udf_put_super(struct super_block
*);
87 static int udf_sync_fs(struct super_block
*, int);
88 static int udf_remount_fs(struct super_block
*, int *, char *);
89 static void udf_load_logicalvolint(struct super_block
*, struct kernel_extent_ad
);
90 static int udf_find_fileset(struct super_block
*, struct kernel_lb_addr
*,
91 struct kernel_lb_addr
*);
92 static void udf_load_fileset(struct super_block
*, struct buffer_head
*,
93 struct kernel_lb_addr
*);
94 static void udf_open_lvid(struct super_block
*);
95 static void udf_close_lvid(struct super_block
*);
96 static unsigned int udf_count_free(struct super_block
*);
97 static int udf_statfs(struct dentry
*, struct kstatfs
*);
98 static int udf_show_options(struct seq_file
*, struct dentry
*);
100 struct logicalVolIntegrityDescImpUse
*udf_sb_lvidiu(struct super_block
*sb
)
102 struct logicalVolIntegrityDesc
*lvid
;
103 unsigned int partnum
;
106 if (!UDF_SB(sb
)->s_lvid_bh
)
108 lvid
= (struct logicalVolIntegrityDesc
*)UDF_SB(sb
)->s_lvid_bh
->b_data
;
109 partnum
= le32_to_cpu(lvid
->numOfPartitions
);
110 if ((sb
->s_blocksize
- sizeof(struct logicalVolIntegrityDescImpUse
) -
111 offsetof(struct logicalVolIntegrityDesc
, impUse
)) /
112 (2 * sizeof(uint32_t)) < partnum
) {
113 udf_err(sb
, "Logical volume integrity descriptor corrupted "
114 "(numOfPartitions = %u)!\n", partnum
);
117 /* The offset is to skip freeSpaceTable and sizeTable arrays */
118 offset
= partnum
* 2 * sizeof(uint32_t);
119 return (struct logicalVolIntegrityDescImpUse
*)&(lvid
->impUse
[offset
]);
122 /* UDF filesystem type */
123 static struct dentry
*udf_mount(struct file_system_type
*fs_type
,
124 int flags
, const char *dev_name
, void *data
)
126 return mount_bdev(fs_type
, flags
, dev_name
, data
, udf_fill_super
);
129 static struct file_system_type udf_fstype
= {
130 .owner
= THIS_MODULE
,
133 .kill_sb
= kill_block_super
,
134 .fs_flags
= FS_REQUIRES_DEV
,
136 MODULE_ALIAS_FS("udf");
138 static struct kmem_cache
*udf_inode_cachep
;
140 static struct inode
*udf_alloc_inode(struct super_block
*sb
)
142 struct udf_inode_info
*ei
;
143 ei
= kmem_cache_alloc(udf_inode_cachep
, GFP_KERNEL
);
148 ei
->i_lenExtents
= 0;
149 ei
->i_next_alloc_block
= 0;
150 ei
->i_next_alloc_goal
= 0;
152 init_rwsem(&ei
->i_data_sem
);
153 ei
->cached_extent
.lstart
= -1;
154 spin_lock_init(&ei
->i_extent_cache_lock
);
156 return &ei
->vfs_inode
;
159 static void udf_i_callback(struct rcu_head
*head
)
161 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
162 kmem_cache_free(udf_inode_cachep
, UDF_I(inode
));
165 static void udf_destroy_inode(struct inode
*inode
)
167 call_rcu(&inode
->i_rcu
, udf_i_callback
);
170 static void init_once(void *foo
)
172 struct udf_inode_info
*ei
= (struct udf_inode_info
*)foo
;
174 ei
->i_ext
.i_data
= NULL
;
175 inode_init_once(&ei
->vfs_inode
);
178 static int __init
init_inodecache(void)
180 udf_inode_cachep
= kmem_cache_create("udf_inode_cache",
181 sizeof(struct udf_inode_info
),
182 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
);
654 int write_rev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
655 if (write_rev
> UDF_MAX_WRITE_VERSION
&& !(*flags
& MS_RDONLY
))
659 uopt
.flags
= sbi
->s_flags
;
660 uopt
.uid
= sbi
->s_uid
;
661 uopt
.gid
= sbi
->s_gid
;
662 uopt
.umask
= sbi
->s_umask
;
663 uopt
.fmode
= sbi
->s_fmode
;
664 uopt
.dmode
= sbi
->s_dmode
;
666 if (!udf_parse_options(options
, &uopt
, true))
669 write_lock(&sbi
->s_cred_lock
);
670 sbi
->s_flags
= uopt
.flags
;
671 sbi
->s_uid
= uopt
.uid
;
672 sbi
->s_gid
= uopt
.gid
;
673 sbi
->s_umask
= uopt
.umask
;
674 sbi
->s_fmode
= uopt
.fmode
;
675 sbi
->s_dmode
= uopt
.dmode
;
676 write_unlock(&sbi
->s_cred_lock
);
678 if ((*flags
& MS_RDONLY
) == (sb
->s_flags
& MS_RDONLY
))
681 if (*flags
& MS_RDONLY
)
690 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
691 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
692 static loff_t
udf_check_vsd(struct super_block
*sb
)
694 struct volStructDesc
*vsd
= NULL
;
695 loff_t sector
= VSD_FIRST_SECTOR_OFFSET
;
697 struct buffer_head
*bh
= NULL
;
700 struct udf_sb_info
*sbi
;
703 if (sb
->s_blocksize
< sizeof(struct volStructDesc
))
704 sectorsize
= sizeof(struct volStructDesc
);
706 sectorsize
= sb
->s_blocksize
;
708 sector
+= (sbi
->s_session
<< sb
->s_blocksize_bits
);
710 udf_debug("Starting at sector %u (%ld byte sectors)\n",
711 (unsigned int)(sector
>> sb
->s_blocksize_bits
),
713 /* Process the sequence (if applicable). The hard limit on the sector
714 * offset is arbitrary, hopefully large enough so that all valid UDF
715 * filesystems will be recognised. There is no mention of an upper
716 * bound to the size of the volume recognition area in the standard.
717 * The limit will prevent the code to read all the sectors of a
718 * specially crafted image (like a bluray disc full of CD001 sectors),
719 * potentially causing minutes or even hours of uninterruptible I/O
720 * activity. This actually happened with uninitialised SSD partitions
721 * (all 0xFF) before the check for the limit and all valid IDs were
723 for (; !nsr02
&& !nsr03
&& sector
< VSD_MAX_SECTOR_OFFSET
;
724 sector
+= sectorsize
) {
726 bh
= udf_tread(sb
, sector
>> sb
->s_blocksize_bits
);
730 /* Look for ISO descriptors */
731 vsd
= (struct volStructDesc
*)(bh
->b_data
+
732 (sector
& (sb
->s_blocksize
- 1)));
734 if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CD001
,
736 switch (vsd
->structType
) {
738 udf_debug("ISO9660 Boot Record found\n");
741 udf_debug("ISO9660 Primary Volume Descriptor found\n");
744 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
747 udf_debug("ISO9660 Volume Partition Descriptor found\n");
750 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
753 udf_debug("ISO9660 VRS (%u) found\n",
757 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BEA01
,
760 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_TEA01
,
764 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR02
,
767 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR03
,
770 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BOOT2
,
773 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CDW02
,
777 /* invalid id : end of volume recognition area */
788 else if (!bh
&& sector
- (sbi
->s_session
<< sb
->s_blocksize_bits
) ==
789 VSD_FIRST_SECTOR_OFFSET
)
795 static int udf_find_fileset(struct super_block
*sb
,
796 struct kernel_lb_addr
*fileset
,
797 struct kernel_lb_addr
*root
)
799 struct buffer_head
*bh
= NULL
;
802 struct udf_sb_info
*sbi
;
804 if (fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
805 fileset
->partitionReferenceNum
!= 0xFFFF) {
806 bh
= udf_read_ptagged(sb
, fileset
, 0, &ident
);
810 } else if (ident
!= TAG_IDENT_FSD
) {
819 /* Search backwards through the partitions */
820 struct kernel_lb_addr newfileset
;
822 /* --> cvg: FIXME - is it reasonable? */
825 for (newfileset
.partitionReferenceNum
= sbi
->s_partitions
- 1;
826 (newfileset
.partitionReferenceNum
!= 0xFFFF &&
827 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
828 fileset
->partitionReferenceNum
== 0xFFFF);
829 newfileset
.partitionReferenceNum
--) {
830 lastblock
= sbi
->s_partmaps
831 [newfileset
.partitionReferenceNum
]
833 newfileset
.logicalBlockNum
= 0;
836 bh
= udf_read_ptagged(sb
, &newfileset
, 0,
839 newfileset
.logicalBlockNum
++;
846 struct spaceBitmapDesc
*sp
;
847 sp
= (struct spaceBitmapDesc
*)
849 newfileset
.logicalBlockNum
+= 1 +
850 ((le32_to_cpu(sp
->numOfBytes
) +
851 sizeof(struct spaceBitmapDesc
)
852 - 1) >> sb
->s_blocksize_bits
);
857 *fileset
= newfileset
;
860 newfileset
.logicalBlockNum
++;
865 } while (newfileset
.logicalBlockNum
< lastblock
&&
866 fileset
->logicalBlockNum
== 0xFFFFFFFF &&
867 fileset
->partitionReferenceNum
== 0xFFFF);
871 if ((fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
872 fileset
->partitionReferenceNum
!= 0xFFFF) && bh
) {
873 udf_debug("Fileset at block=%d, partition=%d\n",
874 fileset
->logicalBlockNum
,
875 fileset
->partitionReferenceNum
);
877 sbi
->s_partition
= fileset
->partitionReferenceNum
;
878 udf_load_fileset(sb
, bh
, root
);
886 * Load primary Volume Descriptor Sequence
888 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
891 static int udf_load_pvoldesc(struct super_block
*sb
, sector_t block
)
893 struct primaryVolDesc
*pvoldesc
;
894 struct ustr
*instr
, *outstr
;
895 struct buffer_head
*bh
;
899 instr
= kmalloc(sizeof(struct ustr
), GFP_NOFS
);
903 outstr
= kmalloc(sizeof(struct ustr
), GFP_NOFS
);
907 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
913 if (ident
!= TAG_IDENT_PVD
) {
918 pvoldesc
= (struct primaryVolDesc
*)bh
->b_data
;
920 if (udf_disk_stamp_to_time(&UDF_SB(sb
)->s_record_time
,
921 pvoldesc
->recordingDateAndTime
)) {
923 struct timestamp
*ts
= &pvoldesc
->recordingDateAndTime
;
924 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
925 le16_to_cpu(ts
->year
), ts
->month
, ts
->day
, ts
->hour
,
926 ts
->minute
, le16_to_cpu(ts
->typeAndTimezone
));
930 if (!udf_build_ustr(instr
, pvoldesc
->volIdent
, 32))
931 if (udf_CS0toUTF8(outstr
, instr
)) {
932 strncpy(UDF_SB(sb
)->s_volume_ident
, outstr
->u_name
,
933 outstr
->u_len
> 31 ? 31 : outstr
->u_len
);
934 udf_debug("volIdent[] = '%s'\n",
935 UDF_SB(sb
)->s_volume_ident
);
938 if (!udf_build_ustr(instr
, pvoldesc
->volSetIdent
, 128))
939 if (udf_CS0toUTF8(outstr
, instr
))
940 udf_debug("volSetIdent[] = '%s'\n", outstr
->u_name
);
952 struct inode
*udf_find_metadata_inode_efe(struct super_block
*sb
,
953 u32 meta_file_loc
, u32 partition_num
)
955 struct kernel_lb_addr addr
;
956 struct inode
*metadata_fe
;
958 addr
.logicalBlockNum
= meta_file_loc
;
959 addr
.partitionReferenceNum
= partition_num
;
961 metadata_fe
= udf_iget(sb
, &addr
);
963 if (metadata_fe
== NULL
)
964 udf_warn(sb
, "metadata inode efe not found\n");
965 else if (UDF_I(metadata_fe
)->i_alloc_type
!= ICBTAG_FLAG_AD_SHORT
) {
966 udf_warn(sb
, "metadata inode efe does not have short allocation descriptors!\n");
974 static int udf_load_metadata_files(struct super_block
*sb
, int partition
)
976 struct udf_sb_info
*sbi
= UDF_SB(sb
);
977 struct udf_part_map
*map
;
978 struct udf_meta_data
*mdata
;
979 struct kernel_lb_addr addr
;
981 map
= &sbi
->s_partmaps
[partition
];
982 mdata
= &map
->s_type_specific
.s_metadata
;
984 /* metadata address */
985 udf_debug("Metadata file location: block = %d part = %d\n",
986 mdata
->s_meta_file_loc
, map
->s_partition_num
);
988 mdata
->s_metadata_fe
= udf_find_metadata_inode_efe(sb
,
989 mdata
->s_meta_file_loc
, map
->s_partition_num
);
991 if (mdata
->s_metadata_fe
== NULL
) {
992 /* mirror file entry */
993 udf_debug("Mirror metadata file location: block = %d part = %d\n",
994 mdata
->s_mirror_file_loc
, map
->s_partition_num
);
996 mdata
->s_mirror_fe
= udf_find_metadata_inode_efe(sb
,
997 mdata
->s_mirror_file_loc
, map
->s_partition_num
);
999 if (mdata
->s_mirror_fe
== NULL
) {
1000 udf_err(sb
, "Both metadata and mirror metadata inode efe can not found\n");
1008 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1010 if (mdata
->s_bitmap_file_loc
!= 0xFFFFFFFF) {
1011 addr
.logicalBlockNum
= mdata
->s_bitmap_file_loc
;
1012 addr
.partitionReferenceNum
= map
->s_partition_num
;
1014 udf_debug("Bitmap file location: block = %d part = %d\n",
1015 addr
.logicalBlockNum
, addr
.partitionReferenceNum
);
1017 mdata
->s_bitmap_fe
= udf_iget(sb
, &addr
);
1018 if (mdata
->s_bitmap_fe
== NULL
) {
1019 if (sb
->s_flags
& MS_RDONLY
)
1020 udf_warn(sb
, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1022 udf_err(sb
, "bitmap inode efe not found and attempted read-write mount\n");
1028 udf_debug("udf_load_metadata_files Ok\n");
1032 static void udf_load_fileset(struct super_block
*sb
, struct buffer_head
*bh
,
1033 struct kernel_lb_addr
*root
)
1035 struct fileSetDesc
*fset
;
1037 fset
= (struct fileSetDesc
*)bh
->b_data
;
1039 *root
= lelb_to_cpu(fset
->rootDirectoryICB
.extLocation
);
1041 UDF_SB(sb
)->s_serial_number
= le16_to_cpu(fset
->descTag
.tagSerialNum
);
1043 udf_debug("Rootdir at block=%d, partition=%d\n",
1044 root
->logicalBlockNum
, root
->partitionReferenceNum
);
1047 int udf_compute_nr_groups(struct super_block
*sb
, u32 partition
)
1049 struct udf_part_map
*map
= &UDF_SB(sb
)->s_partmaps
[partition
];
1050 return DIV_ROUND_UP(map
->s_partition_len
+
1051 (sizeof(struct spaceBitmapDesc
) << 3),
1052 sb
->s_blocksize
* 8);
1055 static struct udf_bitmap
*udf_sb_alloc_bitmap(struct super_block
*sb
, u32 index
)
1057 struct udf_bitmap
*bitmap
;
1061 nr_groups
= udf_compute_nr_groups(sb
, index
);
1062 size
= sizeof(struct udf_bitmap
) +
1063 (sizeof(struct buffer_head
*) * nr_groups
);
1065 if (size
<= PAGE_SIZE
)
1066 bitmap
= kzalloc(size
, GFP_KERNEL
);
1068 bitmap
= vzalloc(size
); /* TODO: get rid of vzalloc */
1073 bitmap
->s_nr_groups
= nr_groups
;
1077 static int udf_fill_partdesc_info(struct super_block
*sb
,
1078 struct partitionDesc
*p
, int p_index
)
1080 struct udf_part_map
*map
;
1081 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1082 struct partitionHeaderDesc
*phd
;
1084 map
= &sbi
->s_partmaps
[p_index
];
1086 map
->s_partition_len
= le32_to_cpu(p
->partitionLength
); /* blocks */
1087 map
->s_partition_root
= le32_to_cpu(p
->partitionStartingLocation
);
1089 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY
))
1090 map
->s_partition_flags
|= UDF_PART_FLAG_READ_ONLY
;
1091 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE
))
1092 map
->s_partition_flags
|= UDF_PART_FLAG_WRITE_ONCE
;
1093 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE
))
1094 map
->s_partition_flags
|= UDF_PART_FLAG_REWRITABLE
;
1095 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE
))
1096 map
->s_partition_flags
|= UDF_PART_FLAG_OVERWRITABLE
;
1098 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1099 p_index
, map
->s_partition_type
,
1100 map
->s_partition_root
, map
->s_partition_len
);
1102 if (strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR02
) &&
1103 strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR03
))
1106 phd
= (struct partitionHeaderDesc
*)p
->partitionContentsUse
;
1107 if (phd
->unallocSpaceTable
.extLength
) {
1108 struct kernel_lb_addr loc
= {
1109 .logicalBlockNum
= le32_to_cpu(
1110 phd
->unallocSpaceTable
.extPosition
),
1111 .partitionReferenceNum
= p_index
,
1114 map
->s_uspace
.s_table
= udf_iget(sb
, &loc
);
1115 if (!map
->s_uspace
.s_table
) {
1116 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1120 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_TABLE
;
1121 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1122 p_index
, map
->s_uspace
.s_table
->i_ino
);
1125 if (phd
->unallocSpaceBitmap
.extLength
) {
1126 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1129 map
->s_uspace
.s_bitmap
= bitmap
;
1130 bitmap
->s_extPosition
= le32_to_cpu(
1131 phd
->unallocSpaceBitmap
.extPosition
);
1132 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_BITMAP
;
1133 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1134 p_index
, bitmap
->s_extPosition
);
1137 if (phd
->partitionIntegrityTable
.extLength
)
1138 udf_debug("partitionIntegrityTable (part %d)\n", p_index
);
1140 if (phd
->freedSpaceTable
.extLength
) {
1141 struct kernel_lb_addr loc
= {
1142 .logicalBlockNum
= le32_to_cpu(
1143 phd
->freedSpaceTable
.extPosition
),
1144 .partitionReferenceNum
= p_index
,
1147 map
->s_fspace
.s_table
= udf_iget(sb
, &loc
);
1148 if (!map
->s_fspace
.s_table
) {
1149 udf_debug("cannot load freedSpaceTable (part %d)\n",
1154 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_TABLE
;
1155 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1156 p_index
, map
->s_fspace
.s_table
->i_ino
);
1159 if (phd
->freedSpaceBitmap
.extLength
) {
1160 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1163 map
->s_fspace
.s_bitmap
= bitmap
;
1164 bitmap
->s_extPosition
= le32_to_cpu(
1165 phd
->freedSpaceBitmap
.extPosition
);
1166 map
->s_partition_flags
|= UDF_PART_FLAG_FREED_BITMAP
;
1167 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1168 p_index
, bitmap
->s_extPosition
);
1173 static void udf_find_vat_block(struct super_block
*sb
, int p_index
,
1174 int type1_index
, sector_t start_block
)
1176 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1177 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1179 struct kernel_lb_addr ino
;
1182 * VAT file entry is in the last recorded block. Some broken disks have
1183 * it a few blocks before so try a bit harder...
1185 ino
.partitionReferenceNum
= type1_index
;
1186 for (vat_block
= start_block
;
1187 vat_block
>= map
->s_partition_root
&&
1188 vat_block
>= start_block
- 3 &&
1189 !sbi
->s_vat_inode
; vat_block
--) {
1190 ino
.logicalBlockNum
= vat_block
- map
->s_partition_root
;
1191 sbi
->s_vat_inode
= udf_iget(sb
, &ino
);
1195 static int udf_load_vat(struct super_block
*sb
, int p_index
, int type1_index
)
1197 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1198 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1199 struct buffer_head
*bh
= NULL
;
1200 struct udf_inode_info
*vati
;
1202 struct virtualAllocationTable20
*vat20
;
1203 sector_t blocks
= sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
;
1205 udf_find_vat_block(sb
, p_index
, type1_index
, sbi
->s_last_block
);
1206 if (!sbi
->s_vat_inode
&&
1207 sbi
->s_last_block
!= blocks
- 1) {
1208 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1209 (unsigned long)sbi
->s_last_block
,
1210 (unsigned long)blocks
- 1);
1211 udf_find_vat_block(sb
, p_index
, type1_index
, blocks
- 1);
1213 if (!sbi
->s_vat_inode
)
1216 if (map
->s_partition_type
== UDF_VIRTUAL_MAP15
) {
1217 map
->s_type_specific
.s_virtual
.s_start_offset
= 0;
1218 map
->s_type_specific
.s_virtual
.s_num_entries
=
1219 (sbi
->s_vat_inode
->i_size
- 36) >> 2;
1220 } else if (map
->s_partition_type
== UDF_VIRTUAL_MAP20
) {
1221 vati
= UDF_I(sbi
->s_vat_inode
);
1222 if (vati
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
1223 pos
= udf_block_map(sbi
->s_vat_inode
, 0);
1224 bh
= sb_bread(sb
, pos
);
1227 vat20
= (struct virtualAllocationTable20
*)bh
->b_data
;
1229 vat20
= (struct virtualAllocationTable20
*)
1233 map
->s_type_specific
.s_virtual
.s_start_offset
=
1234 le16_to_cpu(vat20
->lengthHeader
);
1235 map
->s_type_specific
.s_virtual
.s_num_entries
=
1236 (sbi
->s_vat_inode
->i_size
-
1237 map
->s_type_specific
.s_virtual
.
1238 s_start_offset
) >> 2;
1245 * Load partition descriptor block
1247 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1250 static int udf_load_partdesc(struct super_block
*sb
, sector_t block
)
1252 struct buffer_head
*bh
;
1253 struct partitionDesc
*p
;
1254 struct udf_part_map
*map
;
1255 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1257 uint16_t partitionNumber
;
1261 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1264 if (ident
!= TAG_IDENT_PD
) {
1269 p
= (struct partitionDesc
*)bh
->b_data
;
1270 partitionNumber
= le16_to_cpu(p
->partitionNumber
);
1272 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1273 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1274 map
= &sbi
->s_partmaps
[i
];
1275 udf_debug("Searching map: (%d == %d)\n",
1276 map
->s_partition_num
, partitionNumber
);
1277 if (map
->s_partition_num
== partitionNumber
&&
1278 (map
->s_partition_type
== UDF_TYPE1_MAP15
||
1279 map
->s_partition_type
== UDF_SPARABLE_MAP15
))
1283 if (i
>= sbi
->s_partitions
) {
1284 udf_debug("Partition (%d) not found in partition map\n",
1290 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1295 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1296 * PHYSICAL partitions are already set up
1300 map
= NULL
; /* supress 'maybe used uninitialized' warning */
1302 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1303 map
= &sbi
->s_partmaps
[i
];
1305 if (map
->s_partition_num
== partitionNumber
&&
1306 (map
->s_partition_type
== UDF_VIRTUAL_MAP15
||
1307 map
->s_partition_type
== UDF_VIRTUAL_MAP20
||
1308 map
->s_partition_type
== UDF_METADATA_MAP25
))
1312 if (i
>= sbi
->s_partitions
) {
1317 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1321 if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
1322 ret
= udf_load_metadata_files(sb
, i
);
1324 udf_err(sb
, "error loading MetaData partition map %d\n",
1330 * If we have a partition with virtual map, we don't handle
1331 * writing to it (we overwrite blocks instead of relocating
1334 if (!(sb
->s_flags
& MS_RDONLY
)) {
1338 ret
= udf_load_vat(sb
, i
, type1_idx
);
1344 /* In case loading failed, we handle cleanup in udf_fill_super */
1349 static int udf_load_sparable_map(struct super_block
*sb
,
1350 struct udf_part_map
*map
,
1351 struct sparablePartitionMap
*spm
)
1355 struct sparingTable
*st
;
1356 struct udf_sparing_data
*sdata
= &map
->s_type_specific
.s_sparing
;
1358 struct buffer_head
*bh
;
1360 map
->s_partition_type
= UDF_SPARABLE_MAP15
;
1361 sdata
->s_packet_len
= le16_to_cpu(spm
->packetLength
);
1362 if (!is_power_of_2(sdata
->s_packet_len
)) {
1363 udf_err(sb
, "error loading logical volume descriptor: "
1364 "Invalid packet length %u\n",
1365 (unsigned)sdata
->s_packet_len
);
1368 if (spm
->numSparingTables
> 4) {
1369 udf_err(sb
, "error loading logical volume descriptor: "
1370 "Too many sparing tables (%d)\n",
1371 (int)spm
->numSparingTables
);
1375 for (i
= 0; i
< spm
->numSparingTables
; i
++) {
1376 loc
= le32_to_cpu(spm
->locSparingTable
[i
]);
1377 bh
= udf_read_tagged(sb
, loc
, loc
, &ident
);
1381 st
= (struct sparingTable
*)bh
->b_data
;
1383 strncmp(st
->sparingIdent
.ident
, UDF_ID_SPARING
,
1384 strlen(UDF_ID_SPARING
)) ||
1385 sizeof(*st
) + le16_to_cpu(st
->reallocationTableLen
) >
1391 sdata
->s_spar_map
[i
] = bh
;
1393 map
->s_partition_func
= udf_get_pblock_spar15
;
1397 static int udf_load_logicalvol(struct super_block
*sb
, sector_t block
,
1398 struct kernel_lb_addr
*fileset
)
1400 struct logicalVolDesc
*lvd
;
1403 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1404 struct genericPartitionMap
*gpm
;
1406 struct buffer_head
*bh
;
1407 unsigned int table_len
;
1410 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1413 BUG_ON(ident
!= TAG_IDENT_LVD
);
1414 lvd
= (struct logicalVolDesc
*)bh
->b_data
;
1415 table_len
= le32_to_cpu(lvd
->mapTableLength
);
1416 if (table_len
> sb
->s_blocksize
- sizeof(*lvd
)) {
1417 udf_err(sb
, "error loading logical volume descriptor: "
1418 "Partition table too long (%u > %lu)\n", table_len
,
1419 sb
->s_blocksize
- sizeof(*lvd
));
1424 ret
= udf_sb_alloc_partition_maps(sb
, le32_to_cpu(lvd
->numPartitionMaps
));
1428 for (i
= 0, offset
= 0;
1429 i
< sbi
->s_partitions
&& offset
< table_len
;
1430 i
++, offset
+= gpm
->partitionMapLength
) {
1431 struct udf_part_map
*map
= &sbi
->s_partmaps
[i
];
1432 gpm
= (struct genericPartitionMap
*)
1433 &(lvd
->partitionMaps
[offset
]);
1434 type
= gpm
->partitionMapType
;
1436 struct genericPartitionMap1
*gpm1
=
1437 (struct genericPartitionMap1
*)gpm
;
1438 map
->s_partition_type
= UDF_TYPE1_MAP15
;
1439 map
->s_volumeseqnum
= le16_to_cpu(gpm1
->volSeqNum
);
1440 map
->s_partition_num
= le16_to_cpu(gpm1
->partitionNum
);
1441 map
->s_partition_func
= NULL
;
1442 } else if (type
== 2) {
1443 struct udfPartitionMap2
*upm2
=
1444 (struct udfPartitionMap2
*)gpm
;
1445 if (!strncmp(upm2
->partIdent
.ident
, UDF_ID_VIRTUAL
,
1446 strlen(UDF_ID_VIRTUAL
))) {
1448 le16_to_cpu(((__le16
*)upm2
->partIdent
.
1451 map
->s_partition_type
=
1453 map
->s_partition_func
=
1454 udf_get_pblock_virt15
;
1456 map
->s_partition_type
=
1458 map
->s_partition_func
=
1459 udf_get_pblock_virt20
;
1461 } else if (!strncmp(upm2
->partIdent
.ident
,
1463 strlen(UDF_ID_SPARABLE
))) {
1464 ret
= udf_load_sparable_map(sb
, map
,
1465 (struct sparablePartitionMap
*)gpm
);
1468 } else if (!strncmp(upm2
->partIdent
.ident
,
1470 strlen(UDF_ID_METADATA
))) {
1471 struct udf_meta_data
*mdata
=
1472 &map
->s_type_specific
.s_metadata
;
1473 struct metadataPartitionMap
*mdm
=
1474 (struct metadataPartitionMap
*)
1475 &(lvd
->partitionMaps
[offset
]);
1476 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1477 i
, type
, UDF_ID_METADATA
);
1479 map
->s_partition_type
= UDF_METADATA_MAP25
;
1480 map
->s_partition_func
= udf_get_pblock_meta25
;
1482 mdata
->s_meta_file_loc
=
1483 le32_to_cpu(mdm
->metadataFileLoc
);
1484 mdata
->s_mirror_file_loc
=
1485 le32_to_cpu(mdm
->metadataMirrorFileLoc
);
1486 mdata
->s_bitmap_file_loc
=
1487 le32_to_cpu(mdm
->metadataBitmapFileLoc
);
1488 mdata
->s_alloc_unit_size
=
1489 le32_to_cpu(mdm
->allocUnitSize
);
1490 mdata
->s_align_unit_size
=
1491 le16_to_cpu(mdm
->alignUnitSize
);
1492 if (mdm
->flags
& 0x01)
1493 mdata
->s_flags
|= MF_DUPLICATE_MD
;
1495 udf_debug("Metadata Ident suffix=0x%x\n",
1496 le16_to_cpu(*(__le16
*)
1497 mdm
->partIdent
.identSuffix
));
1498 udf_debug("Metadata part num=%d\n",
1499 le16_to_cpu(mdm
->partitionNum
));
1500 udf_debug("Metadata part alloc unit size=%d\n",
1501 le32_to_cpu(mdm
->allocUnitSize
));
1502 udf_debug("Metadata file loc=%d\n",
1503 le32_to_cpu(mdm
->metadataFileLoc
));
1504 udf_debug("Mirror file loc=%d\n",
1505 le32_to_cpu(mdm
->metadataMirrorFileLoc
));
1506 udf_debug("Bitmap file loc=%d\n",
1507 le32_to_cpu(mdm
->metadataBitmapFileLoc
));
1508 udf_debug("Flags: %d %d\n",
1509 mdata
->s_flags
, mdm
->flags
);
1511 udf_debug("Unknown ident: %s\n",
1512 upm2
->partIdent
.ident
);
1515 map
->s_volumeseqnum
= le16_to_cpu(upm2
->volSeqNum
);
1516 map
->s_partition_num
= le16_to_cpu(upm2
->partitionNum
);
1518 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1519 i
, map
->s_partition_num
, type
, map
->s_volumeseqnum
);
1523 struct long_ad
*la
= (struct long_ad
*)&(lvd
->logicalVolContentsUse
[0]);
1525 *fileset
= lelb_to_cpu(la
->extLocation
);
1526 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1527 fileset
->logicalBlockNum
,
1528 fileset
->partitionReferenceNum
);
1530 if (lvd
->integritySeqExt
.extLength
)
1531 udf_load_logicalvolint(sb
, leea_to_cpu(lvd
->integritySeqExt
));
1539 * udf_load_logicalvolint
1542 static void udf_load_logicalvolint(struct super_block
*sb
, struct kernel_extent_ad loc
)
1544 struct buffer_head
*bh
= NULL
;
1546 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1547 struct logicalVolIntegrityDesc
*lvid
;
1549 while (loc
.extLength
> 0 &&
1550 (bh
= udf_read_tagged(sb
, loc
.extLocation
,
1551 loc
.extLocation
, &ident
)) &&
1552 ident
== TAG_IDENT_LVID
) {
1553 sbi
->s_lvid_bh
= bh
;
1554 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1556 if (lvid
->nextIntegrityExt
.extLength
)
1557 udf_load_logicalvolint(sb
,
1558 leea_to_cpu(lvid
->nextIntegrityExt
));
1560 if (sbi
->s_lvid_bh
!= bh
)
1562 loc
.extLength
-= sb
->s_blocksize
;
1565 if (sbi
->s_lvid_bh
!= bh
)
1570 * Process a main/reserve volume descriptor sequence.
1571 * @block First block of first extent of the sequence.
1572 * @lastblock Lastblock of first extent of the sequence.
1573 * @fileset There we store extent containing root fileset
1575 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1578 static noinline
int udf_process_sequence(
1579 struct super_block
*sb
,
1580 sector_t block
, sector_t lastblock
,
1581 struct kernel_lb_addr
*fileset
)
1583 struct buffer_head
*bh
= NULL
;
1584 struct udf_vds_record vds
[VDS_POS_LENGTH
];
1585 struct udf_vds_record
*curr
;
1586 struct generic_desc
*gd
;
1587 struct volDescPtr
*vdp
;
1591 long next_s
= 0, next_e
= 0;
1594 memset(vds
, 0, sizeof(struct udf_vds_record
) * VDS_POS_LENGTH
);
1597 * Read the main descriptor sequence and find which descriptors
1600 for (; (!done
&& block
<= lastblock
); block
++) {
1602 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1605 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1606 (unsigned long long)block
);
1610 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1611 gd
= (struct generic_desc
*)bh
->b_data
;
1612 vdsn
= le32_to_cpu(gd
->volDescSeqNum
);
1614 case TAG_IDENT_PVD
: /* ISO 13346 3/10.1 */
1615 curr
= &vds
[VDS_POS_PRIMARY_VOL_DESC
];
1616 if (vdsn
>= curr
->volDescSeqNum
) {
1617 curr
->volDescSeqNum
= vdsn
;
1618 curr
->block
= block
;
1621 case TAG_IDENT_VDP
: /* ISO 13346 3/10.3 */
1622 curr
= &vds
[VDS_POS_VOL_DESC_PTR
];
1623 if (vdsn
>= curr
->volDescSeqNum
) {
1624 curr
->volDescSeqNum
= vdsn
;
1625 curr
->block
= block
;
1627 vdp
= (struct volDescPtr
*)bh
->b_data
;
1628 next_s
= le32_to_cpu(
1629 vdp
->nextVolDescSeqExt
.extLocation
);
1630 next_e
= le32_to_cpu(
1631 vdp
->nextVolDescSeqExt
.extLength
);
1632 next_e
= next_e
>> sb
->s_blocksize_bits
;
1636 case TAG_IDENT_IUVD
: /* ISO 13346 3/10.4 */
1637 curr
= &vds
[VDS_POS_IMP_USE_VOL_DESC
];
1638 if (vdsn
>= curr
->volDescSeqNum
) {
1639 curr
->volDescSeqNum
= vdsn
;
1640 curr
->block
= block
;
1643 case TAG_IDENT_PD
: /* ISO 13346 3/10.5 */
1644 curr
= &vds
[VDS_POS_PARTITION_DESC
];
1646 curr
->block
= block
;
1648 case TAG_IDENT_LVD
: /* ISO 13346 3/10.6 */
1649 curr
= &vds
[VDS_POS_LOGICAL_VOL_DESC
];
1650 if (vdsn
>= curr
->volDescSeqNum
) {
1651 curr
->volDescSeqNum
= vdsn
;
1652 curr
->block
= block
;
1655 case TAG_IDENT_USD
: /* ISO 13346 3/10.8 */
1656 curr
= &vds
[VDS_POS_UNALLOC_SPACE_DESC
];
1657 if (vdsn
>= curr
->volDescSeqNum
) {
1658 curr
->volDescSeqNum
= vdsn
;
1659 curr
->block
= block
;
1662 case TAG_IDENT_TD
: /* ISO 13346 3/10.9 */
1663 vds
[VDS_POS_TERMINATING_DESC
].block
= block
;
1667 next_s
= next_e
= 0;
1675 * Now read interesting descriptors again and process them
1676 * in a suitable order
1678 if (!vds
[VDS_POS_PRIMARY_VOL_DESC
].block
) {
1679 udf_err(sb
, "Primary Volume Descriptor not found!\n");
1682 ret
= udf_load_pvoldesc(sb
, vds
[VDS_POS_PRIMARY_VOL_DESC
].block
);
1686 if (vds
[VDS_POS_LOGICAL_VOL_DESC
].block
) {
1687 ret
= udf_load_logicalvol(sb
,
1688 vds
[VDS_POS_LOGICAL_VOL_DESC
].block
,
1694 if (vds
[VDS_POS_PARTITION_DESC
].block
) {
1696 * We rescan the whole descriptor sequence to find
1697 * partition descriptor blocks and process them.
1699 for (block
= vds
[VDS_POS_PARTITION_DESC
].block
;
1700 block
< vds
[VDS_POS_TERMINATING_DESC
].block
;
1702 ret
= udf_load_partdesc(sb
, block
);
1712 * Load Volume Descriptor Sequence described by anchor in bh
1714 * Returns <0 on error, 0 on success
1716 static int udf_load_sequence(struct super_block
*sb
, struct buffer_head
*bh
,
1717 struct kernel_lb_addr
*fileset
)
1719 struct anchorVolDescPtr
*anchor
;
1720 sector_t main_s
, main_e
, reserve_s
, reserve_e
;
1723 anchor
= (struct anchorVolDescPtr
*)bh
->b_data
;
1725 /* Locate the main sequence */
1726 main_s
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLocation
);
1727 main_e
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLength
);
1728 main_e
= main_e
>> sb
->s_blocksize_bits
;
1731 /* Locate the reserve sequence */
1732 reserve_s
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLocation
);
1733 reserve_e
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLength
);
1734 reserve_e
= reserve_e
>> sb
->s_blocksize_bits
;
1735 reserve_e
+= reserve_s
;
1737 /* Process the main & reserve sequences */
1738 /* responsible for finding the PartitionDesc(s) */
1739 ret
= udf_process_sequence(sb
, main_s
, main_e
, fileset
);
1742 udf_sb_free_partitions(sb
);
1743 ret
= udf_process_sequence(sb
, reserve_s
, reserve_e
, fileset
);
1745 udf_sb_free_partitions(sb
);
1746 /* No sequence was OK, return -EIO */
1754 * Check whether there is an anchor block in the given block and
1755 * load Volume Descriptor Sequence if so.
1757 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1760 static int udf_check_anchor_block(struct super_block
*sb
, sector_t block
,
1761 struct kernel_lb_addr
*fileset
)
1763 struct buffer_head
*bh
;
1767 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_VARCONV
) &&
1768 udf_fixed_to_variable(block
) >=
1769 sb
->s_bdev
->bd_inode
->i_size
>> sb
->s_blocksize_bits
)
1772 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1775 if (ident
!= TAG_IDENT_AVDP
) {
1779 ret
= udf_load_sequence(sb
, bh
, fileset
);
1785 * Search for an anchor volume descriptor pointer.
1787 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1790 static int udf_scan_anchors(struct super_block
*sb
, sector_t
*lastblock
,
1791 struct kernel_lb_addr
*fileset
)
1795 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1799 /* First try user provided anchor */
1800 if (sbi
->s_anchor
) {
1801 ret
= udf_check_anchor_block(sb
, sbi
->s_anchor
, fileset
);
1806 * according to spec, anchor is in either:
1810 * however, if the disc isn't closed, it could be 512.
1812 ret
= udf_check_anchor_block(sb
, sbi
->s_session
+ 256, fileset
);
1816 * The trouble is which block is the last one. Drives often misreport
1817 * this so we try various possibilities.
1819 last
[last_count
++] = *lastblock
;
1820 if (*lastblock
>= 1)
1821 last
[last_count
++] = *lastblock
- 1;
1822 last
[last_count
++] = *lastblock
+ 1;
1823 if (*lastblock
>= 2)
1824 last
[last_count
++] = *lastblock
- 2;
1825 if (*lastblock
>= 150)
1826 last
[last_count
++] = *lastblock
- 150;
1827 if (*lastblock
>= 152)
1828 last
[last_count
++] = *lastblock
- 152;
1830 for (i
= 0; i
< last_count
; i
++) {
1831 if (last
[i
] >= sb
->s_bdev
->bd_inode
->i_size
>>
1832 sb
->s_blocksize_bits
)
1834 ret
= udf_check_anchor_block(sb
, last
[i
], fileset
);
1835 if (ret
!= -EAGAIN
) {
1837 *lastblock
= last
[i
];
1842 ret
= udf_check_anchor_block(sb
, last
[i
] - 256, fileset
);
1843 if (ret
!= -EAGAIN
) {
1845 *lastblock
= last
[i
];
1850 /* Finally try block 512 in case media is open */
1851 return udf_check_anchor_block(sb
, sbi
->s_session
+ 512, fileset
);
1855 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1856 * area specified by it. The function expects sbi->s_lastblock to be the last
1857 * block on the media.
1859 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1862 static int udf_find_anchor(struct super_block
*sb
,
1863 struct kernel_lb_addr
*fileset
)
1865 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1866 sector_t lastblock
= sbi
->s_last_block
;
1869 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1873 /* No anchor found? Try VARCONV conversion of block numbers */
1874 UDF_SET_FLAG(sb
, UDF_FLAG_VARCONV
);
1875 lastblock
= udf_variable_to_fixed(sbi
->s_last_block
);
1876 /* Firstly, we try to not convert number of the last block */
1877 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1881 lastblock
= sbi
->s_last_block
;
1882 /* Secondly, we try with converted number of the last block */
1883 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1885 /* VARCONV didn't help. Clear it. */
1886 UDF_CLEAR_FLAG(sb
, UDF_FLAG_VARCONV
);
1890 sbi
->s_last_block
= lastblock
;
1895 * Check Volume Structure Descriptor, find Anchor block and load Volume
1896 * Descriptor Sequence.
1898 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1899 * block was not found.
1901 static int udf_load_vrs(struct super_block
*sb
, struct udf_options
*uopt
,
1902 int silent
, struct kernel_lb_addr
*fileset
)
1904 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1908 if (!sb_set_blocksize(sb
, uopt
->blocksize
)) {
1910 udf_warn(sb
, "Bad block size\n");
1913 sbi
->s_last_block
= uopt
->lastblock
;
1915 /* Check that it is NSR02 compliant */
1916 nsr_off
= udf_check_vsd(sb
);
1919 udf_warn(sb
, "No VRS found\n");
1923 udf_debug("Failed to read sector at offset %d. "
1924 "Assuming open disc. Skipping validity "
1925 "check\n", VSD_FIRST_SECTOR_OFFSET
);
1926 if (!sbi
->s_last_block
)
1927 sbi
->s_last_block
= udf_get_last_block(sb
);
1929 udf_debug("Validity check skipped because of novrs option\n");
1932 /* Look for anchor block and load Volume Descriptor Sequence */
1933 sbi
->s_anchor
= uopt
->anchor
;
1934 ret
= udf_find_anchor(sb
, fileset
);
1936 if (!silent
&& ret
== -EAGAIN
)
1937 udf_warn(sb
, "No anchor found\n");
1943 static void udf_open_lvid(struct super_block
*sb
)
1945 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1946 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1947 struct logicalVolIntegrityDesc
*lvid
;
1948 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1952 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1953 lvidiu
= udf_sb_lvidiu(sb
);
1957 mutex_lock(&sbi
->s_alloc_mutex
);
1958 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1959 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1960 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
,
1962 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN
);
1964 lvid
->descTag
.descCRC
= cpu_to_le16(
1965 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
1966 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
1968 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
1969 mark_buffer_dirty(bh
);
1970 sbi
->s_lvid_dirty
= 0;
1971 mutex_unlock(&sbi
->s_alloc_mutex
);
1972 /* Make opening of filesystem visible on the media immediately */
1973 sync_dirty_buffer(bh
);
1976 static void udf_close_lvid(struct super_block
*sb
)
1978 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1979 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1980 struct logicalVolIntegrityDesc
*lvid
;
1981 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1985 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1986 lvidiu
= udf_sb_lvidiu(sb
);
1990 mutex_lock(&sbi
->s_alloc_mutex
);
1991 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1992 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1993 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, CURRENT_TIME
);
1994 if (UDF_MAX_WRITE_VERSION
> le16_to_cpu(lvidiu
->maxUDFWriteRev
))
1995 lvidiu
->maxUDFWriteRev
= cpu_to_le16(UDF_MAX_WRITE_VERSION
);
1996 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFReadRev
))
1997 lvidiu
->minUDFReadRev
= cpu_to_le16(sbi
->s_udfrev
);
1998 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFWriteRev
))
1999 lvidiu
->minUDFWriteRev
= cpu_to_le16(sbi
->s_udfrev
);
2000 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE
);
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
);
2008 * We set buffer uptodate unconditionally here to avoid spurious
2009 * warnings from mark_buffer_dirty() when previous EIO has marked
2010 * the buffer as !uptodate
2012 set_buffer_uptodate(bh
);
2013 mark_buffer_dirty(bh
);
2014 sbi
->s_lvid_dirty
= 0;
2015 mutex_unlock(&sbi
->s_alloc_mutex
);
2016 /* Make closing of filesystem visible on the media immediately */
2017 sync_dirty_buffer(bh
);
2020 u64
lvid_get_unique_id(struct super_block
*sb
)
2022 struct buffer_head
*bh
;
2023 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2024 struct logicalVolIntegrityDesc
*lvid
;
2025 struct logicalVolHeaderDesc
*lvhd
;
2029 bh
= sbi
->s_lvid_bh
;
2033 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2034 lvhd
= (struct logicalVolHeaderDesc
*)lvid
->logicalVolContentsUse
;
2036 mutex_lock(&sbi
->s_alloc_mutex
);
2037 ret
= uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
2038 if (!(++uniqueID
& 0xFFFFFFFF))
2040 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
2041 mutex_unlock(&sbi
->s_alloc_mutex
);
2042 mark_buffer_dirty(bh
);
2047 static int udf_fill_super(struct super_block
*sb
, void *options
, int silent
)
2050 struct inode
*inode
= NULL
;
2051 struct udf_options uopt
;
2052 struct kernel_lb_addr rootdir
, fileset
;
2053 struct udf_sb_info
*sbi
;
2055 uopt
.flags
= (1 << UDF_FLAG_USE_AD_IN_ICB
) | (1 << UDF_FLAG_STRICT
);
2056 uopt
.uid
= INVALID_UID
;
2057 uopt
.gid
= INVALID_GID
;
2059 uopt
.fmode
= UDF_INVALID_MODE
;
2060 uopt
.dmode
= UDF_INVALID_MODE
;
2062 sbi
= kzalloc(sizeof(struct udf_sb_info
), GFP_KERNEL
);
2066 sb
->s_fs_info
= sbi
;
2068 mutex_init(&sbi
->s_alloc_mutex
);
2070 if (!udf_parse_options((char *)options
, &uopt
, false))
2073 if (uopt
.flags
& (1 << UDF_FLAG_UTF8
) &&
2074 uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) {
2075 udf_err(sb
, "utf8 cannot be combined with iocharset\n");
2078 #ifdef CONFIG_UDF_NLS
2079 if ((uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) && !uopt
.nls_map
) {
2080 uopt
.nls_map
= load_nls_default();
2082 uopt
.flags
&= ~(1 << UDF_FLAG_NLS_MAP
);
2084 udf_debug("Using default NLS map\n");
2087 if (!(uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)))
2088 uopt
.flags
|= (1 << UDF_FLAG_UTF8
);
2090 fileset
.logicalBlockNum
= 0xFFFFFFFF;
2091 fileset
.partitionReferenceNum
= 0xFFFF;
2093 sbi
->s_flags
= uopt
.flags
;
2094 sbi
->s_uid
= uopt
.uid
;
2095 sbi
->s_gid
= uopt
.gid
;
2096 sbi
->s_umask
= uopt
.umask
;
2097 sbi
->s_fmode
= uopt
.fmode
;
2098 sbi
->s_dmode
= uopt
.dmode
;
2099 sbi
->s_nls_map
= uopt
.nls_map
;
2100 rwlock_init(&sbi
->s_cred_lock
);
2102 if (uopt
.session
== 0xFFFFFFFF)
2103 sbi
->s_session
= udf_get_last_session(sb
);
2105 sbi
->s_session
= uopt
.session
;
2107 udf_debug("Multi-session=%d\n", sbi
->s_session
);
2109 /* Fill in the rest of the superblock */
2110 sb
->s_op
= &udf_sb_ops
;
2111 sb
->s_export_op
= &udf_export_ops
;
2113 sb
->s_magic
= UDF_SUPER_MAGIC
;
2114 sb
->s_time_gran
= 1000;
2116 if (uopt
.flags
& (1 << UDF_FLAG_BLOCKSIZE_SET
)) {
2117 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2119 uopt
.blocksize
= bdev_logical_block_size(sb
->s_bdev
);
2120 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2121 if (ret
== -EAGAIN
&& uopt
.blocksize
!= UDF_DEFAULT_BLOCKSIZE
) {
2123 pr_notice("Rescanning with blocksize %d\n",
2124 UDF_DEFAULT_BLOCKSIZE
);
2125 brelse(sbi
->s_lvid_bh
);
2126 sbi
->s_lvid_bh
= NULL
;
2127 uopt
.blocksize
= UDF_DEFAULT_BLOCKSIZE
;
2128 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2132 if (ret
== -EAGAIN
) {
2133 udf_warn(sb
, "No partition found (1)\n");
2139 udf_debug("Lastblock=%d\n", sbi
->s_last_block
);
2141 if (sbi
->s_lvid_bh
) {
2142 struct logicalVolIntegrityDescImpUse
*lvidiu
=
2144 uint16_t minUDFReadRev
;
2145 uint16_t minUDFWriteRev
;
2151 minUDFReadRev
= le16_to_cpu(lvidiu
->minUDFReadRev
);
2152 minUDFWriteRev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
2153 if (minUDFReadRev
> UDF_MAX_READ_VERSION
) {
2154 udf_err(sb
, "minUDFReadRev=%x (max is %x)\n",
2156 UDF_MAX_READ_VERSION
);
2159 } else if (minUDFWriteRev
> UDF_MAX_WRITE_VERSION
&&
2160 !(sb
->s_flags
& MS_RDONLY
)) {
2165 sbi
->s_udfrev
= minUDFWriteRev
;
2167 if (minUDFReadRev
>= UDF_VERS_USE_EXTENDED_FE
)
2168 UDF_SET_FLAG(sb
, UDF_FLAG_USE_EXTENDED_FE
);
2169 if (minUDFReadRev
>= UDF_VERS_USE_STREAMS
)
2170 UDF_SET_FLAG(sb
, UDF_FLAG_USE_STREAMS
);
2173 if (!sbi
->s_partitions
) {
2174 udf_warn(sb
, "No partition found (2)\n");
2179 if (sbi
->s_partmaps
[sbi
->s_partition
].s_partition_flags
&
2180 UDF_PART_FLAG_READ_ONLY
&&
2181 !(sb
->s_flags
& MS_RDONLY
)) {
2186 if (udf_find_fileset(sb
, &fileset
, &rootdir
)) {
2187 udf_warn(sb
, "No fileset found\n");
2193 struct timestamp ts
;
2194 udf_time_to_disk_stamp(&ts
, sbi
->s_record_time
);
2195 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2196 sbi
->s_volume_ident
,
2197 le16_to_cpu(ts
.year
), ts
.month
, ts
.day
,
2198 ts
.hour
, ts
.minute
, le16_to_cpu(ts
.typeAndTimezone
));
2200 if (!(sb
->s_flags
& MS_RDONLY
))
2203 /* Assign the root inode */
2204 /* assign inodes by physical block number */
2205 /* perhaps it's not extensible enough, but for now ... */
2206 inode
= udf_iget(sb
, &rootdir
);
2208 udf_err(sb
, "Error in udf_iget, block=%d, partition=%d\n",
2209 rootdir
.logicalBlockNum
, rootdir
.partitionReferenceNum
);
2214 /* Allocate a dentry for the root inode */
2215 sb
->s_root
= d_make_root(inode
);
2217 udf_err(sb
, "Couldn't allocate root dentry\n");
2221 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
2222 sb
->s_max_links
= UDF_MAX_LINKS
;
2226 if (sbi
->s_vat_inode
)
2227 iput(sbi
->s_vat_inode
);
2228 #ifdef CONFIG_UDF_NLS
2229 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2230 unload_nls(sbi
->s_nls_map
);
2232 if (!(sb
->s_flags
& MS_RDONLY
))
2234 brelse(sbi
->s_lvid_bh
);
2235 udf_sb_free_partitions(sb
);
2237 sb
->s_fs_info
= NULL
;
2242 void _udf_err(struct super_block
*sb
, const char *function
,
2243 const char *fmt
, ...)
2245 struct va_format vaf
;
2248 va_start(args
, fmt
);
2253 pr_err("error (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2258 void _udf_warn(struct super_block
*sb
, const char *function
,
2259 const char *fmt
, ...)
2261 struct va_format vaf
;
2264 va_start(args
, fmt
);
2269 pr_warn("warning (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2274 static void udf_put_super(struct super_block
*sb
)
2276 struct udf_sb_info
*sbi
;
2280 if (sbi
->s_vat_inode
)
2281 iput(sbi
->s_vat_inode
);
2282 #ifdef CONFIG_UDF_NLS
2283 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2284 unload_nls(sbi
->s_nls_map
);
2286 if (!(sb
->s_flags
& MS_RDONLY
))
2288 brelse(sbi
->s_lvid_bh
);
2289 udf_sb_free_partitions(sb
);
2290 kfree(sb
->s_fs_info
);
2291 sb
->s_fs_info
= NULL
;
2294 static int udf_sync_fs(struct super_block
*sb
, int wait
)
2296 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2298 mutex_lock(&sbi
->s_alloc_mutex
);
2299 if (sbi
->s_lvid_dirty
) {
2301 * Blockdevice will be synced later so we don't have to submit
2304 mark_buffer_dirty(sbi
->s_lvid_bh
);
2305 sbi
->s_lvid_dirty
= 0;
2307 mutex_unlock(&sbi
->s_alloc_mutex
);
2312 static int udf_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2314 struct super_block
*sb
= dentry
->d_sb
;
2315 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2316 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2317 u64 id
= huge_encode_dev(sb
->s_bdev
->bd_dev
);
2319 lvidiu
= udf_sb_lvidiu(sb
);
2320 buf
->f_type
= UDF_SUPER_MAGIC
;
2321 buf
->f_bsize
= sb
->s_blocksize
;
2322 buf
->f_blocks
= sbi
->s_partmaps
[sbi
->s_partition
].s_partition_len
;
2323 buf
->f_bfree
= udf_count_free(sb
);
2324 buf
->f_bavail
= buf
->f_bfree
;
2325 buf
->f_files
= (lvidiu
!= NULL
? (le32_to_cpu(lvidiu
->numFiles
) +
2326 le32_to_cpu(lvidiu
->numDirs
)) : 0)
2328 buf
->f_ffree
= buf
->f_bfree
;
2329 buf
->f_namelen
= UDF_NAME_LEN
- 2;
2330 buf
->f_fsid
.val
[0] = (u32
)id
;
2331 buf
->f_fsid
.val
[1] = (u32
)(id
>> 32);
2336 static unsigned int udf_count_free_bitmap(struct super_block
*sb
,
2337 struct udf_bitmap
*bitmap
)
2339 struct buffer_head
*bh
= NULL
;
2340 unsigned int accum
= 0;
2342 int block
= 0, newblock
;
2343 struct kernel_lb_addr loc
;
2347 struct spaceBitmapDesc
*bm
;
2349 loc
.logicalBlockNum
= bitmap
->s_extPosition
;
2350 loc
.partitionReferenceNum
= UDF_SB(sb
)->s_partition
;
2351 bh
= udf_read_ptagged(sb
, &loc
, 0, &ident
);
2354 udf_err(sb
, "udf_count_free failed\n");
2356 } else if (ident
!= TAG_IDENT_SBD
) {
2358 udf_err(sb
, "udf_count_free failed\n");
2362 bm
= (struct spaceBitmapDesc
*)bh
->b_data
;
2363 bytes
= le32_to_cpu(bm
->numOfBytes
);
2364 index
= sizeof(struct spaceBitmapDesc
); /* offset in first block only */
2365 ptr
= (uint8_t *)bh
->b_data
;
2368 u32 cur_bytes
= min_t(u32
, bytes
, sb
->s_blocksize
- index
);
2369 accum
+= bitmap_weight((const unsigned long *)(ptr
+ index
),
2374 newblock
= udf_get_lb_pblock(sb
, &loc
, ++block
);
2375 bh
= udf_tread(sb
, newblock
);
2377 udf_debug("read failed\n");
2381 ptr
= (uint8_t *)bh
->b_data
;
2389 static unsigned int udf_count_free_table(struct super_block
*sb
,
2390 struct inode
*table
)
2392 unsigned int accum
= 0;
2394 struct kernel_lb_addr eloc
;
2396 struct extent_position epos
;
2398 mutex_lock(&UDF_SB(sb
)->s_alloc_mutex
);
2399 epos
.block
= UDF_I(table
)->i_location
;
2400 epos
.offset
= sizeof(struct unallocSpaceEntry
);
2403 while ((etype
= udf_next_aext(table
, &epos
, &eloc
, &elen
, 1)) != -1)
2404 accum
+= (elen
>> table
->i_sb
->s_blocksize_bits
);
2407 mutex_unlock(&UDF_SB(sb
)->s_alloc_mutex
);
2412 static unsigned int udf_count_free(struct super_block
*sb
)
2414 unsigned int accum
= 0;
2415 struct udf_sb_info
*sbi
;
2416 struct udf_part_map
*map
;
2419 if (sbi
->s_lvid_bh
) {
2420 struct logicalVolIntegrityDesc
*lvid
=
2421 (struct logicalVolIntegrityDesc
*)
2422 sbi
->s_lvid_bh
->b_data
;
2423 if (le32_to_cpu(lvid
->numOfPartitions
) > sbi
->s_partition
) {
2424 accum
= le32_to_cpu(
2425 lvid
->freeSpaceTable
[sbi
->s_partition
]);
2426 if (accum
== 0xFFFFFFFF)
2434 map
= &sbi
->s_partmaps
[sbi
->s_partition
];
2435 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
) {
2436 accum
+= udf_count_free_bitmap(sb
,
2437 map
->s_uspace
.s_bitmap
);
2439 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_BITMAP
) {
2440 accum
+= udf_count_free_bitmap(sb
,
2441 map
->s_fspace
.s_bitmap
);
2446 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
) {
2447 accum
+= udf_count_free_table(sb
,
2448 map
->s_uspace
.s_table
);
2450 if (map
->s_partition_flags
& UDF_PART_FLAG_FREED_TABLE
) {
2451 accum
+= udf_count_free_table(sb
,
2452 map
->s_fspace
.s_table
);