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>
68 VDS_POS_PRIMARY_VOL_DESC
,
69 VDS_POS_UNALLOC_SPACE_DESC
,
70 VDS_POS_LOGICAL_VOL_DESC
,
71 VDS_POS_IMP_USE_VOL_DESC
,
75 #define VSD_FIRST_SECTOR_OFFSET 32768
76 #define VSD_MAX_SECTOR_OFFSET 0x800000
79 * Maximum number of Terminating Descriptor / Logical Volume Integrity
80 * Descriptor redirections. The chosen numbers are arbitrary - just that we
81 * hopefully don't limit any real use of rewritten inode on write-once media
82 * but avoid looping for too long on corrupted media.
84 #define UDF_MAX_TD_NESTING 64
85 #define UDF_MAX_LVID_NESTING 1000
87 enum { UDF_MAX_LINKS
= 0xffff };
89 /* These are the "meat" - everything else is stuffing */
90 static int udf_fill_super(struct super_block
*, void *, int);
91 static void udf_put_super(struct super_block
*);
92 static int udf_sync_fs(struct super_block
*, int);
93 static int udf_remount_fs(struct super_block
*, int *, char *);
94 static void udf_load_logicalvolint(struct super_block
*, struct kernel_extent_ad
);
95 static int udf_find_fileset(struct super_block
*, struct kernel_lb_addr
*,
96 struct kernel_lb_addr
*);
97 static void udf_load_fileset(struct super_block
*, struct buffer_head
*,
98 struct kernel_lb_addr
*);
99 static void udf_open_lvid(struct super_block
*);
100 static void udf_close_lvid(struct super_block
*);
101 static unsigned int udf_count_free(struct super_block
*);
102 static int udf_statfs(struct dentry
*, struct kstatfs
*);
103 static int udf_show_options(struct seq_file
*, struct dentry
*);
105 struct logicalVolIntegrityDescImpUse
*udf_sb_lvidiu(struct super_block
*sb
)
107 struct logicalVolIntegrityDesc
*lvid
;
108 unsigned int partnum
;
111 if (!UDF_SB(sb
)->s_lvid_bh
)
113 lvid
= (struct logicalVolIntegrityDesc
*)UDF_SB(sb
)->s_lvid_bh
->b_data
;
114 partnum
= le32_to_cpu(lvid
->numOfPartitions
);
115 if ((sb
->s_blocksize
- sizeof(struct logicalVolIntegrityDescImpUse
) -
116 offsetof(struct logicalVolIntegrityDesc
, impUse
)) /
117 (2 * sizeof(uint32_t)) < partnum
) {
118 udf_err(sb
, "Logical volume integrity descriptor corrupted "
119 "(numOfPartitions = %u)!\n", partnum
);
122 /* The offset is to skip freeSpaceTable and sizeTable arrays */
123 offset
= partnum
* 2 * sizeof(uint32_t);
124 return (struct logicalVolIntegrityDescImpUse
*)&(lvid
->impUse
[offset
]);
127 /* UDF filesystem type */
128 static struct dentry
*udf_mount(struct file_system_type
*fs_type
,
129 int flags
, const char *dev_name
, void *data
)
131 return mount_bdev(fs_type
, flags
, dev_name
, data
, udf_fill_super
);
134 static struct file_system_type udf_fstype
= {
135 .owner
= THIS_MODULE
,
138 .kill_sb
= kill_block_super
,
139 .fs_flags
= FS_REQUIRES_DEV
,
141 MODULE_ALIAS_FS("udf");
143 static struct kmem_cache
*udf_inode_cachep
;
145 static struct inode
*udf_alloc_inode(struct super_block
*sb
)
147 struct udf_inode_info
*ei
;
148 ei
= kmem_cache_alloc(udf_inode_cachep
, GFP_KERNEL
);
153 ei
->i_lenExtents
= 0;
154 ei
->i_next_alloc_block
= 0;
155 ei
->i_next_alloc_goal
= 0;
157 init_rwsem(&ei
->i_data_sem
);
158 ei
->cached_extent
.lstart
= -1;
159 spin_lock_init(&ei
->i_extent_cache_lock
);
161 return &ei
->vfs_inode
;
164 static void udf_free_in_core_inode(struct inode
*inode
)
166 kmem_cache_free(udf_inode_cachep
, UDF_I(inode
));
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 .free_inode
= udf_free_in_core_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
;
225 struct nls_table
*nls_map
;
228 static int __init
init_udf_fs(void)
232 err
= init_inodecache();
235 err
= register_filesystem(&udf_fstype
);
242 destroy_inodecache();
248 static void __exit
exit_udf_fs(void)
250 unregister_filesystem(&udf_fstype
);
251 destroy_inodecache();
254 static int udf_sb_alloc_partition_maps(struct super_block
*sb
, u32 count
)
256 struct udf_sb_info
*sbi
= UDF_SB(sb
);
258 sbi
->s_partmaps
= kcalloc(count
, sizeof(*sbi
->s_partmaps
), GFP_KERNEL
);
259 if (!sbi
->s_partmaps
) {
260 sbi
->s_partitions
= 0;
264 sbi
->s_partitions
= count
;
268 static void udf_sb_free_bitmap(struct udf_bitmap
*bitmap
)
271 int nr_groups
= bitmap
->s_nr_groups
;
273 for (i
= 0; i
< nr_groups
; i
++)
274 if (bitmap
->s_block_bitmap
[i
])
275 brelse(bitmap
->s_block_bitmap
[i
]);
280 static void udf_free_partition(struct udf_part_map
*map
)
283 struct udf_meta_data
*mdata
;
285 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
)
286 iput(map
->s_uspace
.s_table
);
287 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_BITMAP
)
288 udf_sb_free_bitmap(map
->s_uspace
.s_bitmap
);
289 if (map
->s_partition_type
== UDF_SPARABLE_MAP15
)
290 for (i
= 0; i
< 4; i
++)
291 brelse(map
->s_type_specific
.s_sparing
.s_spar_map
[i
]);
292 else if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
293 mdata
= &map
->s_type_specific
.s_metadata
;
294 iput(mdata
->s_metadata_fe
);
295 mdata
->s_metadata_fe
= NULL
;
297 iput(mdata
->s_mirror_fe
);
298 mdata
->s_mirror_fe
= NULL
;
300 iput(mdata
->s_bitmap_fe
);
301 mdata
->s_bitmap_fe
= NULL
;
305 static void udf_sb_free_partitions(struct super_block
*sb
)
307 struct udf_sb_info
*sbi
= UDF_SB(sb
);
310 if (!sbi
->s_partmaps
)
312 for (i
= 0; i
< sbi
->s_partitions
; i
++)
313 udf_free_partition(&sbi
->s_partmaps
[i
]);
314 kfree(sbi
->s_partmaps
);
315 sbi
->s_partmaps
= NULL
;
318 static int udf_show_options(struct seq_file
*seq
, struct dentry
*root
)
320 struct super_block
*sb
= root
->d_sb
;
321 struct udf_sb_info
*sbi
= UDF_SB(sb
);
323 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_STRICT
))
324 seq_puts(seq
, ",nostrict");
325 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_BLOCKSIZE_SET
))
326 seq_printf(seq
, ",bs=%lu", sb
->s_blocksize
);
327 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNHIDE
))
328 seq_puts(seq
, ",unhide");
329 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UNDELETE
))
330 seq_puts(seq
, ",undelete");
331 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_AD_IN_ICB
))
332 seq_puts(seq
, ",noadinicb");
333 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_USE_SHORT_AD
))
334 seq_puts(seq
, ",shortad");
335 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_FORGET
))
336 seq_puts(seq
, ",uid=forget");
337 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_FORGET
))
338 seq_puts(seq
, ",gid=forget");
339 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UID_SET
))
340 seq_printf(seq
, ",uid=%u", from_kuid(&init_user_ns
, sbi
->s_uid
));
341 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_GID_SET
))
342 seq_printf(seq
, ",gid=%u", from_kgid(&init_user_ns
, sbi
->s_gid
));
343 if (sbi
->s_umask
!= 0)
344 seq_printf(seq
, ",umask=%ho", sbi
->s_umask
);
345 if (sbi
->s_fmode
!= UDF_INVALID_MODE
)
346 seq_printf(seq
, ",mode=%ho", sbi
->s_fmode
);
347 if (sbi
->s_dmode
!= UDF_INVALID_MODE
)
348 seq_printf(seq
, ",dmode=%ho", sbi
->s_dmode
);
349 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_SESSION_SET
))
350 seq_printf(seq
, ",session=%d", sbi
->s_session
);
351 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_LASTBLOCK_SET
))
352 seq_printf(seq
, ",lastblock=%u", sbi
->s_last_block
);
353 if (sbi
->s_anchor
!= 0)
354 seq_printf(seq
, ",anchor=%u", sbi
->s_anchor
);
355 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_UTF8
))
356 seq_puts(seq
, ",utf8");
357 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
) && sbi
->s_nls_map
)
358 seq_printf(seq
, ",iocharset=%s", sbi
->s_nls_map
->charset
);
367 * Parse mount options.
370 * The following mount options are supported:
372 * gid= Set the default group.
373 * umask= Set the default umask.
374 * mode= Set the default file permissions.
375 * dmode= Set the default directory permissions.
376 * uid= Set the default user.
377 * bs= Set the block size.
378 * unhide Show otherwise hidden files.
379 * undelete Show deleted files in lists.
380 * adinicb Embed data in the inode (default)
381 * noadinicb Don't embed data in the inode
382 * shortad Use short ad's
383 * longad Use long ad's (default)
384 * nostrict Unset strict conformance
385 * iocharset= Set the NLS character set
387 * The remaining are for debugging and disaster recovery:
389 * novrs Skip volume sequence recognition
391 * The following expect a offset from 0.
393 * session= Set the CDROM session (default= last session)
394 * anchor= Override standard anchor location. (default= 256)
395 * volume= Override the VolumeDesc location. (unused)
396 * partition= Override the PartitionDesc location. (unused)
397 * lastblock= Set the last block of the filesystem/
399 * The following expect a offset from the partition root.
401 * fileset= Override the fileset block location. (unused)
402 * rootdir= Override the root directory location. (unused)
403 * WARNING: overriding the rootdir to a non-directory may
404 * yield highly unpredictable results.
407 * options Pointer to mount options string.
408 * uopts Pointer to mount options variable.
411 * <return> 1 Mount options parsed okay.
412 * <return> 0 Error parsing mount options.
415 * July 1, 1997 - Andrew E. Mileski
416 * Written, tested, and released.
420 Opt_novrs
, Opt_nostrict
, Opt_bs
, Opt_unhide
, Opt_undelete
,
421 Opt_noadinicb
, Opt_adinicb
, Opt_shortad
, Opt_longad
,
422 Opt_gid
, Opt_uid
, Opt_umask
, Opt_session
, Opt_lastblock
,
423 Opt_anchor
, Opt_volume
, Opt_partition
, Opt_fileset
,
424 Opt_rootdir
, Opt_utf8
, Opt_iocharset
,
425 Opt_err
, Opt_uforget
, Opt_uignore
, Opt_gforget
, Opt_gignore
,
429 static const match_table_t tokens
= {
430 {Opt_novrs
, "novrs"},
431 {Opt_nostrict
, "nostrict"},
433 {Opt_unhide
, "unhide"},
434 {Opt_undelete
, "undelete"},
435 {Opt_noadinicb
, "noadinicb"},
436 {Opt_adinicb
, "adinicb"},
437 {Opt_shortad
, "shortad"},
438 {Opt_longad
, "longad"},
439 {Opt_uforget
, "uid=forget"},
440 {Opt_uignore
, "uid=ignore"},
441 {Opt_gforget
, "gid=forget"},
442 {Opt_gignore
, "gid=ignore"},
445 {Opt_umask
, "umask=%o"},
446 {Opt_session
, "session=%u"},
447 {Opt_lastblock
, "lastblock=%u"},
448 {Opt_anchor
, "anchor=%u"},
449 {Opt_volume
, "volume=%u"},
450 {Opt_partition
, "partition=%u"},
451 {Opt_fileset
, "fileset=%u"},
452 {Opt_rootdir
, "rootdir=%u"},
454 {Opt_iocharset
, "iocharset=%s"},
455 {Opt_fmode
, "mode=%o"},
456 {Opt_dmode
, "dmode=%o"},
460 static int udf_parse_options(char *options
, struct udf_options
*uopt
,
467 uopt
->session
= 0xFFFFFFFF;
474 while ((p
= strsep(&options
, ",")) != NULL
) {
475 substring_t args
[MAX_OPT_ARGS
];
481 token
= match_token(p
, tokens
, args
);
487 if (match_int(&args
[0], &option
))
490 if (n
!= 512 && n
!= 1024 && n
!= 2048 && n
!= 4096)
493 uopt
->flags
|= (1 << UDF_FLAG_BLOCKSIZE_SET
);
496 uopt
->flags
|= (1 << UDF_FLAG_UNHIDE
);
499 uopt
->flags
|= (1 << UDF_FLAG_UNDELETE
);
502 uopt
->flags
&= ~(1 << UDF_FLAG_USE_AD_IN_ICB
);
505 uopt
->flags
|= (1 << UDF_FLAG_USE_AD_IN_ICB
);
508 uopt
->flags
|= (1 << UDF_FLAG_USE_SHORT_AD
);
511 uopt
->flags
&= ~(1 << UDF_FLAG_USE_SHORT_AD
);
514 if (match_int(args
, &option
))
516 uopt
->gid
= make_kgid(current_user_ns(), option
);
517 if (!gid_valid(uopt
->gid
))
519 uopt
->flags
|= (1 << UDF_FLAG_GID_SET
);
522 if (match_int(args
, &option
))
524 uopt
->uid
= make_kuid(current_user_ns(), option
);
525 if (!uid_valid(uopt
->uid
))
527 uopt
->flags
|= (1 << UDF_FLAG_UID_SET
);
530 if (match_octal(args
, &option
))
532 uopt
->umask
= option
;
535 uopt
->flags
&= ~(1 << UDF_FLAG_STRICT
);
538 if (match_int(args
, &option
))
540 uopt
->session
= option
;
542 uopt
->flags
|= (1 << UDF_FLAG_SESSION_SET
);
545 if (match_int(args
, &option
))
547 uopt
->lastblock
= option
;
549 uopt
->flags
|= (1 << UDF_FLAG_LASTBLOCK_SET
);
552 if (match_int(args
, &option
))
554 uopt
->anchor
= option
;
560 /* Ignored (never implemented properly) */
563 uopt
->flags
|= (1 << UDF_FLAG_UTF8
);
568 unload_nls(uopt
->nls_map
);
570 * load_nls() failure is handled later in
571 * udf_fill_super() after all options are
574 uopt
->nls_map
= load_nls(args
[0].from
);
575 uopt
->flags
|= (1 << UDF_FLAG_NLS_MAP
);
579 uopt
->flags
|= (1 << UDF_FLAG_UID_FORGET
);
583 /* These options are superseeded by uid=<number> */
586 uopt
->flags
|= (1 << UDF_FLAG_GID_FORGET
);
589 if (match_octal(args
, &option
))
591 uopt
->fmode
= option
& 0777;
594 if (match_octal(args
, &option
))
596 uopt
->dmode
= option
& 0777;
599 pr_err("bad mount option \"%s\" or missing value\n", p
);
606 static int udf_remount_fs(struct super_block
*sb
, int *flags
, char *options
)
608 struct udf_options uopt
;
609 struct udf_sb_info
*sbi
= UDF_SB(sb
);
612 if (!(*flags
& SB_RDONLY
) && UDF_QUERY_FLAG(sb
, UDF_FLAG_RW_INCOMPAT
))
617 uopt
.flags
= sbi
->s_flags
;
618 uopt
.uid
= sbi
->s_uid
;
619 uopt
.gid
= sbi
->s_gid
;
620 uopt
.umask
= sbi
->s_umask
;
621 uopt
.fmode
= sbi
->s_fmode
;
622 uopt
.dmode
= sbi
->s_dmode
;
625 if (!udf_parse_options(options
, &uopt
, true))
628 write_lock(&sbi
->s_cred_lock
);
629 sbi
->s_flags
= uopt
.flags
;
630 sbi
->s_uid
= uopt
.uid
;
631 sbi
->s_gid
= uopt
.gid
;
632 sbi
->s_umask
= uopt
.umask
;
633 sbi
->s_fmode
= uopt
.fmode
;
634 sbi
->s_dmode
= uopt
.dmode
;
635 write_unlock(&sbi
->s_cred_lock
);
637 if ((bool)(*flags
& SB_RDONLY
) == sb_rdonly(sb
))
640 if (*flags
& SB_RDONLY
)
649 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
650 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
651 static loff_t
udf_check_vsd(struct super_block
*sb
)
653 struct volStructDesc
*vsd
= NULL
;
654 loff_t sector
= VSD_FIRST_SECTOR_OFFSET
;
656 struct buffer_head
*bh
= NULL
;
659 struct udf_sb_info
*sbi
;
662 if (sb
->s_blocksize
< sizeof(struct volStructDesc
))
663 sectorsize
= sizeof(struct volStructDesc
);
665 sectorsize
= sb
->s_blocksize
;
667 sector
+= (((loff_t
)sbi
->s_session
) << sb
->s_blocksize_bits
);
669 udf_debug("Starting at sector %u (%lu byte sectors)\n",
670 (unsigned int)(sector
>> sb
->s_blocksize_bits
),
672 /* Process the sequence (if applicable). The hard limit on the sector
673 * offset is arbitrary, hopefully large enough so that all valid UDF
674 * filesystems will be recognised. There is no mention of an upper
675 * bound to the size of the volume recognition area in the standard.
676 * The limit will prevent the code to read all the sectors of a
677 * specially crafted image (like a bluray disc full of CD001 sectors),
678 * potentially causing minutes or even hours of uninterruptible I/O
679 * activity. This actually happened with uninitialised SSD partitions
680 * (all 0xFF) before the check for the limit and all valid IDs were
682 for (; !nsr02
&& !nsr03
&& sector
< VSD_MAX_SECTOR_OFFSET
;
683 sector
+= sectorsize
) {
685 bh
= udf_tread(sb
, sector
>> sb
->s_blocksize_bits
);
689 /* Look for ISO descriptors */
690 vsd
= (struct volStructDesc
*)(bh
->b_data
+
691 (sector
& (sb
->s_blocksize
- 1)));
693 if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CD001
,
695 switch (vsd
->structType
) {
697 udf_debug("ISO9660 Boot Record found\n");
700 udf_debug("ISO9660 Primary Volume Descriptor found\n");
703 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
706 udf_debug("ISO9660 Volume Partition Descriptor found\n");
709 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
712 udf_debug("ISO9660 VRS (%u) found\n",
716 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BEA01
,
719 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_TEA01
,
723 } else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR02
,
726 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_NSR03
,
729 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_BOOT2
,
732 else if (!strncmp(vsd
->stdIdent
, VSD_STD_ID_CDW02
,
736 /* invalid id : end of volume recognition area */
747 else if (!bh
&& sector
- (sbi
->s_session
<< sb
->s_blocksize_bits
) ==
748 VSD_FIRST_SECTOR_OFFSET
)
754 static int udf_find_fileset(struct super_block
*sb
,
755 struct kernel_lb_addr
*fileset
,
756 struct kernel_lb_addr
*root
)
758 struct buffer_head
*bh
= NULL
;
761 if (fileset
->logicalBlockNum
!= 0xFFFFFFFF ||
762 fileset
->partitionReferenceNum
!= 0xFFFF) {
763 bh
= udf_read_ptagged(sb
, fileset
, 0, &ident
);
767 } else if (ident
!= TAG_IDENT_FSD
) {
772 udf_debug("Fileset at block=%u, partition=%u\n",
773 fileset
->logicalBlockNum
,
774 fileset
->partitionReferenceNum
);
776 UDF_SB(sb
)->s_partition
= fileset
->partitionReferenceNum
;
777 udf_load_fileset(sb
, bh
, root
);
785 * Load primary Volume Descriptor Sequence
787 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
790 static int udf_load_pvoldesc(struct super_block
*sb
, sector_t block
)
792 struct primaryVolDesc
*pvoldesc
;
794 struct buffer_head
*bh
;
798 struct timestamp
*ts
;
801 outstr
= kmalloc(128, GFP_NOFS
);
805 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
811 if (ident
!= TAG_IDENT_PVD
) {
816 pvoldesc
= (struct primaryVolDesc
*)bh
->b_data
;
818 udf_disk_stamp_to_time(&UDF_SB(sb
)->s_record_time
,
819 pvoldesc
->recordingDateAndTime
);
821 ts
= &pvoldesc
->recordingDateAndTime
;
822 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
823 le16_to_cpu(ts
->year
), ts
->month
, ts
->day
, ts
->hour
,
824 ts
->minute
, le16_to_cpu(ts
->typeAndTimezone
));
828 ret
= udf_dstrCS0toChar(sb
, outstr
, 31, pvoldesc
->volIdent
, 32);
830 strcpy(UDF_SB(sb
)->s_volume_ident
, "InvalidName");
831 pr_warn("incorrect volume identification, setting to "
834 strncpy(UDF_SB(sb
)->s_volume_ident
, outstr
, ret
);
836 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb
)->s_volume_ident
);
838 ret
= udf_dstrCS0toChar(sb
, outstr
, 127, pvoldesc
->volSetIdent
, 128);
844 udf_debug("volSetIdent[] = '%s'\n", outstr
);
854 struct inode
*udf_find_metadata_inode_efe(struct super_block
*sb
,
855 u32 meta_file_loc
, u32 partition_ref
)
857 struct kernel_lb_addr addr
;
858 struct inode
*metadata_fe
;
860 addr
.logicalBlockNum
= meta_file_loc
;
861 addr
.partitionReferenceNum
= partition_ref
;
863 metadata_fe
= udf_iget_special(sb
, &addr
);
865 if (IS_ERR(metadata_fe
)) {
866 udf_warn(sb
, "metadata inode efe not found\n");
869 if (UDF_I(metadata_fe
)->i_alloc_type
!= ICBTAG_FLAG_AD_SHORT
) {
870 udf_warn(sb
, "metadata inode efe does not have short allocation descriptors!\n");
872 return ERR_PTR(-EIO
);
878 static int udf_load_metadata_files(struct super_block
*sb
, int partition
,
881 struct udf_sb_info
*sbi
= UDF_SB(sb
);
882 struct udf_part_map
*map
;
883 struct udf_meta_data
*mdata
;
884 struct kernel_lb_addr addr
;
887 map
= &sbi
->s_partmaps
[partition
];
888 mdata
= &map
->s_type_specific
.s_metadata
;
889 mdata
->s_phys_partition_ref
= type1_index
;
891 /* metadata address */
892 udf_debug("Metadata file location: block = %u part = %u\n",
893 mdata
->s_meta_file_loc
, mdata
->s_phys_partition_ref
);
895 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_meta_file_loc
,
896 mdata
->s_phys_partition_ref
);
898 /* mirror file entry */
899 udf_debug("Mirror metadata file location: block = %u part = %u\n",
900 mdata
->s_mirror_file_loc
, mdata
->s_phys_partition_ref
);
902 fe
= udf_find_metadata_inode_efe(sb
, mdata
->s_mirror_file_loc
,
903 mdata
->s_phys_partition_ref
);
906 udf_err(sb
, "Both metadata and mirror metadata inode efe can not found\n");
909 mdata
->s_mirror_fe
= fe
;
911 mdata
->s_metadata_fe
= fe
;
917 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
919 if (mdata
->s_bitmap_file_loc
!= 0xFFFFFFFF) {
920 addr
.logicalBlockNum
= mdata
->s_bitmap_file_loc
;
921 addr
.partitionReferenceNum
= mdata
->s_phys_partition_ref
;
923 udf_debug("Bitmap file location: block = %u part = %u\n",
924 addr
.logicalBlockNum
, addr
.partitionReferenceNum
);
926 fe
= udf_iget_special(sb
, &addr
);
929 udf_warn(sb
, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
931 udf_err(sb
, "bitmap inode efe not found and attempted read-write mount\n");
935 mdata
->s_bitmap_fe
= fe
;
938 udf_debug("udf_load_metadata_files Ok\n");
942 static void udf_load_fileset(struct super_block
*sb
, struct buffer_head
*bh
,
943 struct kernel_lb_addr
*root
)
945 struct fileSetDesc
*fset
;
947 fset
= (struct fileSetDesc
*)bh
->b_data
;
949 *root
= lelb_to_cpu(fset
->rootDirectoryICB
.extLocation
);
951 UDF_SB(sb
)->s_serial_number
= le16_to_cpu(fset
->descTag
.tagSerialNum
);
953 udf_debug("Rootdir at block=%u, partition=%u\n",
954 root
->logicalBlockNum
, root
->partitionReferenceNum
);
957 int udf_compute_nr_groups(struct super_block
*sb
, u32 partition
)
959 struct udf_part_map
*map
= &UDF_SB(sb
)->s_partmaps
[partition
];
960 return DIV_ROUND_UP(map
->s_partition_len
+
961 (sizeof(struct spaceBitmapDesc
) << 3),
962 sb
->s_blocksize
* 8);
965 static struct udf_bitmap
*udf_sb_alloc_bitmap(struct super_block
*sb
, u32 index
)
967 struct udf_bitmap
*bitmap
;
971 nr_groups
= udf_compute_nr_groups(sb
, index
);
972 size
= sizeof(struct udf_bitmap
) +
973 (sizeof(struct buffer_head
*) * nr_groups
);
975 if (size
<= PAGE_SIZE
)
976 bitmap
= kzalloc(size
, GFP_KERNEL
);
978 bitmap
= vzalloc(size
); /* TODO: get rid of vzalloc */
983 bitmap
->s_nr_groups
= nr_groups
;
987 static int check_partition_desc(struct super_block
*sb
,
988 struct partitionDesc
*p
,
989 struct udf_part_map
*map
)
991 bool umap
, utable
, fmap
, ftable
;
992 struct partitionHeaderDesc
*phd
;
994 switch (le32_to_cpu(p
->accessType
)) {
995 case PD_ACCESS_TYPE_READ_ONLY
:
996 case PD_ACCESS_TYPE_WRITE_ONCE
:
997 case PD_ACCESS_TYPE_REWRITABLE
:
998 case PD_ACCESS_TYPE_NONE
:
1002 /* No Partition Header Descriptor? */
1003 if (strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR02
) &&
1004 strcmp(p
->partitionContents
.ident
, PD_PARTITION_CONTENTS_NSR03
))
1007 phd
= (struct partitionHeaderDesc
*)p
->partitionContentsUse
;
1008 utable
= phd
->unallocSpaceTable
.extLength
;
1009 umap
= phd
->unallocSpaceBitmap
.extLength
;
1010 ftable
= phd
->freedSpaceTable
.extLength
;
1011 fmap
= phd
->freedSpaceBitmap
.extLength
;
1013 /* No allocation info? */
1014 if (!utable
&& !umap
&& !ftable
&& !fmap
)
1017 /* We don't support blocks that require erasing before overwrite */
1020 /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */
1024 if (map
->s_partition_type
== UDF_VIRTUAL_MAP15
||
1025 map
->s_partition_type
== UDF_VIRTUAL_MAP20
)
1032 UDF_SET_FLAG(sb
, UDF_FLAG_RW_INCOMPAT
);
1036 static int udf_fill_partdesc_info(struct super_block
*sb
,
1037 struct partitionDesc
*p
, int p_index
)
1039 struct udf_part_map
*map
;
1040 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1041 struct partitionHeaderDesc
*phd
;
1044 map
= &sbi
->s_partmaps
[p_index
];
1046 map
->s_partition_len
= le32_to_cpu(p
->partitionLength
); /* blocks */
1047 map
->s_partition_root
= le32_to_cpu(p
->partitionStartingLocation
);
1049 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY
))
1050 map
->s_partition_flags
|= UDF_PART_FLAG_READ_ONLY
;
1051 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE
))
1052 map
->s_partition_flags
|= UDF_PART_FLAG_WRITE_ONCE
;
1053 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE
))
1054 map
->s_partition_flags
|= UDF_PART_FLAG_REWRITABLE
;
1055 if (p
->accessType
== cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE
))
1056 map
->s_partition_flags
|= UDF_PART_FLAG_OVERWRITABLE
;
1058 udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n",
1059 p_index
, map
->s_partition_type
,
1060 map
->s_partition_root
, map
->s_partition_len
);
1062 err
= check_partition_desc(sb
, p
, map
);
1067 * Skip loading allocation info it we cannot ever write to the fs.
1068 * This is a correctness thing as we may have decided to force ro mount
1069 * to avoid allocation info we don't support.
1071 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_RW_INCOMPAT
))
1074 phd
= (struct partitionHeaderDesc
*)p
->partitionContentsUse
;
1075 if (phd
->unallocSpaceTable
.extLength
) {
1076 struct kernel_lb_addr loc
= {
1077 .logicalBlockNum
= le32_to_cpu(
1078 phd
->unallocSpaceTable
.extPosition
),
1079 .partitionReferenceNum
= p_index
,
1081 struct inode
*inode
;
1083 inode
= udf_iget_special(sb
, &loc
);
1084 if (IS_ERR(inode
)) {
1085 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1087 return PTR_ERR(inode
);
1089 map
->s_uspace
.s_table
= inode
;
1090 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_TABLE
;
1091 udf_debug("unallocSpaceTable (part %d) @ %lu\n",
1092 p_index
, map
->s_uspace
.s_table
->i_ino
);
1095 if (phd
->unallocSpaceBitmap
.extLength
) {
1096 struct udf_bitmap
*bitmap
= udf_sb_alloc_bitmap(sb
, p_index
);
1099 map
->s_uspace
.s_bitmap
= bitmap
;
1100 bitmap
->s_extPosition
= le32_to_cpu(
1101 phd
->unallocSpaceBitmap
.extPosition
);
1102 map
->s_partition_flags
|= UDF_PART_FLAG_UNALLOC_BITMAP
;
1103 udf_debug("unallocSpaceBitmap (part %d) @ %u\n",
1104 p_index
, bitmap
->s_extPosition
);
1110 static void udf_find_vat_block(struct super_block
*sb
, int p_index
,
1111 int type1_index
, sector_t start_block
)
1113 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1114 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1116 struct kernel_lb_addr ino
;
1117 struct inode
*inode
;
1120 * VAT file entry is in the last recorded block. Some broken disks have
1121 * it a few blocks before so try a bit harder...
1123 ino
.partitionReferenceNum
= type1_index
;
1124 for (vat_block
= start_block
;
1125 vat_block
>= map
->s_partition_root
&&
1126 vat_block
>= start_block
- 3; vat_block
--) {
1127 ino
.logicalBlockNum
= vat_block
- map
->s_partition_root
;
1128 inode
= udf_iget_special(sb
, &ino
);
1129 if (!IS_ERR(inode
)) {
1130 sbi
->s_vat_inode
= inode
;
1136 static int udf_load_vat(struct super_block
*sb
, int p_index
, int type1_index
)
1138 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1139 struct udf_part_map
*map
= &sbi
->s_partmaps
[p_index
];
1140 struct buffer_head
*bh
= NULL
;
1141 struct udf_inode_info
*vati
;
1143 struct virtualAllocationTable20
*vat20
;
1144 sector_t blocks
= i_size_read(sb
->s_bdev
->bd_inode
) >>
1145 sb
->s_blocksize_bits
;
1147 udf_find_vat_block(sb
, p_index
, type1_index
, sbi
->s_last_block
);
1148 if (!sbi
->s_vat_inode
&&
1149 sbi
->s_last_block
!= blocks
- 1) {
1150 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1151 (unsigned long)sbi
->s_last_block
,
1152 (unsigned long)blocks
- 1);
1153 udf_find_vat_block(sb
, p_index
, type1_index
, blocks
- 1);
1155 if (!sbi
->s_vat_inode
)
1158 if (map
->s_partition_type
== UDF_VIRTUAL_MAP15
) {
1159 map
->s_type_specific
.s_virtual
.s_start_offset
= 0;
1160 map
->s_type_specific
.s_virtual
.s_num_entries
=
1161 (sbi
->s_vat_inode
->i_size
- 36) >> 2;
1162 } else if (map
->s_partition_type
== UDF_VIRTUAL_MAP20
) {
1163 vati
= UDF_I(sbi
->s_vat_inode
);
1164 if (vati
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
1165 pos
= udf_block_map(sbi
->s_vat_inode
, 0);
1166 bh
= sb_bread(sb
, pos
);
1169 vat20
= (struct virtualAllocationTable20
*)bh
->b_data
;
1171 vat20
= (struct virtualAllocationTable20
*)
1175 map
->s_type_specific
.s_virtual
.s_start_offset
=
1176 le16_to_cpu(vat20
->lengthHeader
);
1177 map
->s_type_specific
.s_virtual
.s_num_entries
=
1178 (sbi
->s_vat_inode
->i_size
-
1179 map
->s_type_specific
.s_virtual
.
1180 s_start_offset
) >> 2;
1187 * Load partition descriptor block
1189 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1192 static int udf_load_partdesc(struct super_block
*sb
, sector_t block
)
1194 struct buffer_head
*bh
;
1195 struct partitionDesc
*p
;
1196 struct udf_part_map
*map
;
1197 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1199 uint16_t partitionNumber
;
1203 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1206 if (ident
!= TAG_IDENT_PD
) {
1211 p
= (struct partitionDesc
*)bh
->b_data
;
1212 partitionNumber
= le16_to_cpu(p
->partitionNumber
);
1214 /* First scan for TYPE1 and SPARABLE partitions */
1215 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1216 map
= &sbi
->s_partmaps
[i
];
1217 udf_debug("Searching map: (%u == %u)\n",
1218 map
->s_partition_num
, partitionNumber
);
1219 if (map
->s_partition_num
== partitionNumber
&&
1220 (map
->s_partition_type
== UDF_TYPE1_MAP15
||
1221 map
->s_partition_type
== UDF_SPARABLE_MAP15
))
1225 if (i
>= sbi
->s_partitions
) {
1226 udf_debug("Partition (%u) not found in partition map\n",
1232 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1237 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1238 * PHYSICAL partitions are already set up
1242 map
= NULL
; /* supress 'maybe used uninitialized' warning */
1244 for (i
= 0; i
< sbi
->s_partitions
; i
++) {
1245 map
= &sbi
->s_partmaps
[i
];
1247 if (map
->s_partition_num
== partitionNumber
&&
1248 (map
->s_partition_type
== UDF_VIRTUAL_MAP15
||
1249 map
->s_partition_type
== UDF_VIRTUAL_MAP20
||
1250 map
->s_partition_type
== UDF_METADATA_MAP25
))
1254 if (i
>= sbi
->s_partitions
) {
1259 ret
= udf_fill_partdesc_info(sb
, p
, i
);
1263 if (map
->s_partition_type
== UDF_METADATA_MAP25
) {
1264 ret
= udf_load_metadata_files(sb
, i
, type1_idx
);
1266 udf_err(sb
, "error loading MetaData partition map %d\n",
1272 * If we have a partition with virtual map, we don't handle
1273 * writing to it (we overwrite blocks instead of relocating
1276 if (!sb_rdonly(sb
)) {
1280 UDF_SET_FLAG(sb
, UDF_FLAG_RW_INCOMPAT
);
1281 ret
= udf_load_vat(sb
, i
, type1_idx
);
1287 /* In case loading failed, we handle cleanup in udf_fill_super */
1292 static int udf_load_sparable_map(struct super_block
*sb
,
1293 struct udf_part_map
*map
,
1294 struct sparablePartitionMap
*spm
)
1298 struct sparingTable
*st
;
1299 struct udf_sparing_data
*sdata
= &map
->s_type_specific
.s_sparing
;
1301 struct buffer_head
*bh
;
1303 map
->s_partition_type
= UDF_SPARABLE_MAP15
;
1304 sdata
->s_packet_len
= le16_to_cpu(spm
->packetLength
);
1305 if (!is_power_of_2(sdata
->s_packet_len
)) {
1306 udf_err(sb
, "error loading logical volume descriptor: "
1307 "Invalid packet length %u\n",
1308 (unsigned)sdata
->s_packet_len
);
1311 if (spm
->numSparingTables
> 4) {
1312 udf_err(sb
, "error loading logical volume descriptor: "
1313 "Too many sparing tables (%d)\n",
1314 (int)spm
->numSparingTables
);
1318 for (i
= 0; i
< spm
->numSparingTables
; i
++) {
1319 loc
= le32_to_cpu(spm
->locSparingTable
[i
]);
1320 bh
= udf_read_tagged(sb
, loc
, loc
, &ident
);
1324 st
= (struct sparingTable
*)bh
->b_data
;
1326 strncmp(st
->sparingIdent
.ident
, UDF_ID_SPARING
,
1327 strlen(UDF_ID_SPARING
)) ||
1328 sizeof(*st
) + le16_to_cpu(st
->reallocationTableLen
) >
1334 sdata
->s_spar_map
[i
] = bh
;
1336 map
->s_partition_func
= udf_get_pblock_spar15
;
1340 static int udf_load_logicalvol(struct super_block
*sb
, sector_t block
,
1341 struct kernel_lb_addr
*fileset
)
1343 struct logicalVolDesc
*lvd
;
1346 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1347 struct genericPartitionMap
*gpm
;
1349 struct buffer_head
*bh
;
1350 unsigned int table_len
;
1353 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1356 BUG_ON(ident
!= TAG_IDENT_LVD
);
1357 lvd
= (struct logicalVolDesc
*)bh
->b_data
;
1358 table_len
= le32_to_cpu(lvd
->mapTableLength
);
1359 if (table_len
> sb
->s_blocksize
- sizeof(*lvd
)) {
1360 udf_err(sb
, "error loading logical volume descriptor: "
1361 "Partition table too long (%u > %lu)\n", table_len
,
1362 sb
->s_blocksize
- sizeof(*lvd
));
1367 ret
= udf_sb_alloc_partition_maps(sb
, le32_to_cpu(lvd
->numPartitionMaps
));
1371 for (i
= 0, offset
= 0;
1372 i
< sbi
->s_partitions
&& offset
< table_len
;
1373 i
++, offset
+= gpm
->partitionMapLength
) {
1374 struct udf_part_map
*map
= &sbi
->s_partmaps
[i
];
1375 gpm
= (struct genericPartitionMap
*)
1376 &(lvd
->partitionMaps
[offset
]);
1377 type
= gpm
->partitionMapType
;
1379 struct genericPartitionMap1
*gpm1
=
1380 (struct genericPartitionMap1
*)gpm
;
1381 map
->s_partition_type
= UDF_TYPE1_MAP15
;
1382 map
->s_volumeseqnum
= le16_to_cpu(gpm1
->volSeqNum
);
1383 map
->s_partition_num
= le16_to_cpu(gpm1
->partitionNum
);
1384 map
->s_partition_func
= NULL
;
1385 } else if (type
== 2) {
1386 struct udfPartitionMap2
*upm2
=
1387 (struct udfPartitionMap2
*)gpm
;
1388 if (!strncmp(upm2
->partIdent
.ident
, UDF_ID_VIRTUAL
,
1389 strlen(UDF_ID_VIRTUAL
))) {
1391 le16_to_cpu(((__le16
*)upm2
->partIdent
.
1394 map
->s_partition_type
=
1396 map
->s_partition_func
=
1397 udf_get_pblock_virt15
;
1399 map
->s_partition_type
=
1401 map
->s_partition_func
=
1402 udf_get_pblock_virt20
;
1404 } else if (!strncmp(upm2
->partIdent
.ident
,
1406 strlen(UDF_ID_SPARABLE
))) {
1407 ret
= udf_load_sparable_map(sb
, map
,
1408 (struct sparablePartitionMap
*)gpm
);
1411 } else if (!strncmp(upm2
->partIdent
.ident
,
1413 strlen(UDF_ID_METADATA
))) {
1414 struct udf_meta_data
*mdata
=
1415 &map
->s_type_specific
.s_metadata
;
1416 struct metadataPartitionMap
*mdm
=
1417 (struct metadataPartitionMap
*)
1418 &(lvd
->partitionMaps
[offset
]);
1419 udf_debug("Parsing Logical vol part %d type %u id=%s\n",
1420 i
, type
, UDF_ID_METADATA
);
1422 map
->s_partition_type
= UDF_METADATA_MAP25
;
1423 map
->s_partition_func
= udf_get_pblock_meta25
;
1425 mdata
->s_meta_file_loc
=
1426 le32_to_cpu(mdm
->metadataFileLoc
);
1427 mdata
->s_mirror_file_loc
=
1428 le32_to_cpu(mdm
->metadataMirrorFileLoc
);
1429 mdata
->s_bitmap_file_loc
=
1430 le32_to_cpu(mdm
->metadataBitmapFileLoc
);
1431 mdata
->s_alloc_unit_size
=
1432 le32_to_cpu(mdm
->allocUnitSize
);
1433 mdata
->s_align_unit_size
=
1434 le16_to_cpu(mdm
->alignUnitSize
);
1435 if (mdm
->flags
& 0x01)
1436 mdata
->s_flags
|= MF_DUPLICATE_MD
;
1438 udf_debug("Metadata Ident suffix=0x%x\n",
1439 le16_to_cpu(*(__le16
*)
1440 mdm
->partIdent
.identSuffix
));
1441 udf_debug("Metadata part num=%u\n",
1442 le16_to_cpu(mdm
->partitionNum
));
1443 udf_debug("Metadata part alloc unit size=%u\n",
1444 le32_to_cpu(mdm
->allocUnitSize
));
1445 udf_debug("Metadata file loc=%u\n",
1446 le32_to_cpu(mdm
->metadataFileLoc
));
1447 udf_debug("Mirror file loc=%u\n",
1448 le32_to_cpu(mdm
->metadataMirrorFileLoc
));
1449 udf_debug("Bitmap file loc=%u\n",
1450 le32_to_cpu(mdm
->metadataBitmapFileLoc
));
1451 udf_debug("Flags: %d %u\n",
1452 mdata
->s_flags
, mdm
->flags
);
1454 udf_debug("Unknown ident: %s\n",
1455 upm2
->partIdent
.ident
);
1458 map
->s_volumeseqnum
= le16_to_cpu(upm2
->volSeqNum
);
1459 map
->s_partition_num
= le16_to_cpu(upm2
->partitionNum
);
1461 udf_debug("Partition (%d:%u) type %u on volume %u\n",
1462 i
, map
->s_partition_num
, type
, map
->s_volumeseqnum
);
1466 struct long_ad
*la
= (struct long_ad
*)&(lvd
->logicalVolContentsUse
[0]);
1468 *fileset
= lelb_to_cpu(la
->extLocation
);
1469 udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n",
1470 fileset
->logicalBlockNum
,
1471 fileset
->partitionReferenceNum
);
1473 if (lvd
->integritySeqExt
.extLength
)
1474 udf_load_logicalvolint(sb
, leea_to_cpu(lvd
->integritySeqExt
));
1477 if (!sbi
->s_lvid_bh
) {
1478 /* We can't generate unique IDs without a valid LVID */
1479 if (sb_rdonly(sb
)) {
1480 UDF_SET_FLAG(sb
, UDF_FLAG_RW_INCOMPAT
);
1482 udf_warn(sb
, "Damaged or missing LVID, forcing "
1483 "readonly mount\n");
1493 * Find the prevailing Logical Volume Integrity Descriptor.
1495 static void udf_load_logicalvolint(struct super_block
*sb
, struct kernel_extent_ad loc
)
1497 struct buffer_head
*bh
, *final_bh
;
1499 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1500 struct logicalVolIntegrityDesc
*lvid
;
1501 int indirections
= 0;
1503 while (++indirections
<= UDF_MAX_LVID_NESTING
) {
1505 while (loc
.extLength
> 0 &&
1506 (bh
= udf_read_tagged(sb
, loc
.extLocation
,
1507 loc
.extLocation
, &ident
))) {
1508 if (ident
!= TAG_IDENT_LVID
) {
1516 loc
.extLength
-= sb
->s_blocksize
;
1523 brelse(sbi
->s_lvid_bh
);
1524 sbi
->s_lvid_bh
= final_bh
;
1526 lvid
= (struct logicalVolIntegrityDesc
*)final_bh
->b_data
;
1527 if (lvid
->nextIntegrityExt
.extLength
== 0)
1530 loc
= leea_to_cpu(lvid
->nextIntegrityExt
);
1533 udf_warn(sb
, "Too many LVID indirections (max %u), ignoring.\n",
1534 UDF_MAX_LVID_NESTING
);
1535 brelse(sbi
->s_lvid_bh
);
1536 sbi
->s_lvid_bh
= NULL
;
1540 * Step for reallocation of table of partition descriptor sequence numbers.
1541 * Must be power of 2.
1543 #define PART_DESC_ALLOC_STEP 32
1545 struct part_desc_seq_scan_data
{
1546 struct udf_vds_record rec
;
1550 struct desc_seq_scan_data
{
1551 struct udf_vds_record vds
[VDS_POS_LENGTH
];
1552 unsigned int size_part_descs
;
1553 unsigned int num_part_descs
;
1554 struct part_desc_seq_scan_data
*part_descs_loc
;
1557 static struct udf_vds_record
*handle_partition_descriptor(
1558 struct buffer_head
*bh
,
1559 struct desc_seq_scan_data
*data
)
1561 struct partitionDesc
*desc
= (struct partitionDesc
*)bh
->b_data
;
1565 partnum
= le16_to_cpu(desc
->partitionNumber
);
1566 for (i
= 0; i
< data
->num_part_descs
; i
++)
1567 if (partnum
== data
->part_descs_loc
[i
].partnum
)
1568 return &(data
->part_descs_loc
[i
].rec
);
1569 if (data
->num_part_descs
>= data
->size_part_descs
) {
1570 struct part_desc_seq_scan_data
*new_loc
;
1571 unsigned int new_size
= ALIGN(partnum
, PART_DESC_ALLOC_STEP
);
1573 new_loc
= kcalloc(new_size
, sizeof(*new_loc
), GFP_KERNEL
);
1575 return ERR_PTR(-ENOMEM
);
1576 memcpy(new_loc
, data
->part_descs_loc
,
1577 data
->size_part_descs
* sizeof(*new_loc
));
1578 kfree(data
->part_descs_loc
);
1579 data
->part_descs_loc
= new_loc
;
1580 data
->size_part_descs
= new_size
;
1582 return &(data
->part_descs_loc
[data
->num_part_descs
++].rec
);
1586 static struct udf_vds_record
*get_volume_descriptor_record(uint16_t ident
,
1587 struct buffer_head
*bh
, struct desc_seq_scan_data
*data
)
1590 case TAG_IDENT_PVD
: /* ISO 13346 3/10.1 */
1591 return &(data
->vds
[VDS_POS_PRIMARY_VOL_DESC
]);
1592 case TAG_IDENT_IUVD
: /* ISO 13346 3/10.4 */
1593 return &(data
->vds
[VDS_POS_IMP_USE_VOL_DESC
]);
1594 case TAG_IDENT_LVD
: /* ISO 13346 3/10.6 */
1595 return &(data
->vds
[VDS_POS_LOGICAL_VOL_DESC
]);
1596 case TAG_IDENT_USD
: /* ISO 13346 3/10.8 */
1597 return &(data
->vds
[VDS_POS_UNALLOC_SPACE_DESC
]);
1598 case TAG_IDENT_PD
: /* ISO 13346 3/10.5 */
1599 return handle_partition_descriptor(bh
, data
);
1605 * Process a main/reserve volume descriptor sequence.
1606 * @block First block of first extent of the sequence.
1607 * @lastblock Lastblock of first extent of the sequence.
1608 * @fileset There we store extent containing root fileset
1610 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1613 static noinline
int udf_process_sequence(
1614 struct super_block
*sb
,
1615 sector_t block
, sector_t lastblock
,
1616 struct kernel_lb_addr
*fileset
)
1618 struct buffer_head
*bh
= NULL
;
1619 struct udf_vds_record
*curr
;
1620 struct generic_desc
*gd
;
1621 struct volDescPtr
*vdp
;
1626 unsigned int indirections
= 0;
1627 struct desc_seq_scan_data data
;
1630 memset(data
.vds
, 0, sizeof(struct udf_vds_record
) * VDS_POS_LENGTH
);
1631 data
.size_part_descs
= PART_DESC_ALLOC_STEP
;
1632 data
.num_part_descs
= 0;
1633 data
.part_descs_loc
= kcalloc(data
.size_part_descs
,
1634 sizeof(*data
.part_descs_loc
),
1636 if (!data
.part_descs_loc
)
1640 * Read the main descriptor sequence and find which descriptors
1643 for (; (!done
&& block
<= lastblock
); block
++) {
1644 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1648 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1649 gd
= (struct generic_desc
*)bh
->b_data
;
1650 vdsn
= le32_to_cpu(gd
->volDescSeqNum
);
1652 case TAG_IDENT_VDP
: /* ISO 13346 3/10.3 */
1653 if (++indirections
> UDF_MAX_TD_NESTING
) {
1654 udf_err(sb
, "too many Volume Descriptor "
1655 "Pointers (max %u supported)\n",
1656 UDF_MAX_TD_NESTING
);
1661 vdp
= (struct volDescPtr
*)bh
->b_data
;
1662 block
= le32_to_cpu(vdp
->nextVolDescSeqExt
.extLocation
);
1663 lastblock
= le32_to_cpu(
1664 vdp
->nextVolDescSeqExt
.extLength
) >>
1665 sb
->s_blocksize_bits
;
1666 lastblock
+= block
- 1;
1667 /* For loop is going to increment 'block' again */
1670 case TAG_IDENT_PVD
: /* ISO 13346 3/10.1 */
1671 case TAG_IDENT_IUVD
: /* ISO 13346 3/10.4 */
1672 case TAG_IDENT_LVD
: /* ISO 13346 3/10.6 */
1673 case TAG_IDENT_USD
: /* ISO 13346 3/10.8 */
1674 case TAG_IDENT_PD
: /* ISO 13346 3/10.5 */
1675 curr
= get_volume_descriptor_record(ident
, bh
, &data
);
1678 return PTR_ERR(curr
);
1680 /* Descriptor we don't care about? */
1683 if (vdsn
>= curr
->volDescSeqNum
) {
1684 curr
->volDescSeqNum
= vdsn
;
1685 curr
->block
= block
;
1688 case TAG_IDENT_TD
: /* ISO 13346 3/10.9 */
1695 * Now read interesting descriptors again and process them
1696 * in a suitable order
1698 if (!data
.vds
[VDS_POS_PRIMARY_VOL_DESC
].block
) {
1699 udf_err(sb
, "Primary Volume Descriptor not found!\n");
1702 ret
= udf_load_pvoldesc(sb
, data
.vds
[VDS_POS_PRIMARY_VOL_DESC
].block
);
1706 if (data
.vds
[VDS_POS_LOGICAL_VOL_DESC
].block
) {
1707 ret
= udf_load_logicalvol(sb
,
1708 data
.vds
[VDS_POS_LOGICAL_VOL_DESC
].block
,
1714 /* Now handle prevailing Partition Descriptors */
1715 for (i
= 0; i
< data
.num_part_descs
; i
++) {
1716 ret
= udf_load_partdesc(sb
, data
.part_descs_loc
[i
].rec
.block
);
1725 * Load Volume Descriptor Sequence described by anchor in bh
1727 * Returns <0 on error, 0 on success
1729 static int udf_load_sequence(struct super_block
*sb
, struct buffer_head
*bh
,
1730 struct kernel_lb_addr
*fileset
)
1732 struct anchorVolDescPtr
*anchor
;
1733 sector_t main_s
, main_e
, reserve_s
, reserve_e
;
1736 anchor
= (struct anchorVolDescPtr
*)bh
->b_data
;
1738 /* Locate the main sequence */
1739 main_s
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLocation
);
1740 main_e
= le32_to_cpu(anchor
->mainVolDescSeqExt
.extLength
);
1741 main_e
= main_e
>> sb
->s_blocksize_bits
;
1742 main_e
+= main_s
- 1;
1744 /* Locate the reserve sequence */
1745 reserve_s
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLocation
);
1746 reserve_e
= le32_to_cpu(anchor
->reserveVolDescSeqExt
.extLength
);
1747 reserve_e
= reserve_e
>> sb
->s_blocksize_bits
;
1748 reserve_e
+= reserve_s
- 1;
1750 /* Process the main & reserve sequences */
1751 /* responsible for finding the PartitionDesc(s) */
1752 ret
= udf_process_sequence(sb
, main_s
, main_e
, fileset
);
1755 udf_sb_free_partitions(sb
);
1756 ret
= udf_process_sequence(sb
, reserve_s
, reserve_e
, fileset
);
1758 udf_sb_free_partitions(sb
);
1759 /* No sequence was OK, return -EIO */
1767 * Check whether there is an anchor block in the given block and
1768 * load Volume Descriptor Sequence if so.
1770 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1773 static int udf_check_anchor_block(struct super_block
*sb
, sector_t block
,
1774 struct kernel_lb_addr
*fileset
)
1776 struct buffer_head
*bh
;
1780 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_VARCONV
) &&
1781 udf_fixed_to_variable(block
) >=
1782 i_size_read(sb
->s_bdev
->bd_inode
) >> sb
->s_blocksize_bits
)
1785 bh
= udf_read_tagged(sb
, block
, block
, &ident
);
1788 if (ident
!= TAG_IDENT_AVDP
) {
1792 ret
= udf_load_sequence(sb
, bh
, fileset
);
1798 * Search for an anchor volume descriptor pointer.
1800 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1803 static int udf_scan_anchors(struct super_block
*sb
, sector_t
*lastblock
,
1804 struct kernel_lb_addr
*fileset
)
1808 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1812 /* First try user provided anchor */
1813 if (sbi
->s_anchor
) {
1814 ret
= udf_check_anchor_block(sb
, sbi
->s_anchor
, fileset
);
1819 * according to spec, anchor is in either:
1823 * however, if the disc isn't closed, it could be 512.
1825 ret
= udf_check_anchor_block(sb
, sbi
->s_session
+ 256, fileset
);
1829 * The trouble is which block is the last one. Drives often misreport
1830 * this so we try various possibilities.
1832 last
[last_count
++] = *lastblock
;
1833 if (*lastblock
>= 1)
1834 last
[last_count
++] = *lastblock
- 1;
1835 last
[last_count
++] = *lastblock
+ 1;
1836 if (*lastblock
>= 2)
1837 last
[last_count
++] = *lastblock
- 2;
1838 if (*lastblock
>= 150)
1839 last
[last_count
++] = *lastblock
- 150;
1840 if (*lastblock
>= 152)
1841 last
[last_count
++] = *lastblock
- 152;
1843 for (i
= 0; i
< last_count
; i
++) {
1844 if (last
[i
] >= i_size_read(sb
->s_bdev
->bd_inode
) >>
1845 sb
->s_blocksize_bits
)
1847 ret
= udf_check_anchor_block(sb
, last
[i
], fileset
);
1848 if (ret
!= -EAGAIN
) {
1850 *lastblock
= last
[i
];
1855 ret
= udf_check_anchor_block(sb
, last
[i
] - 256, fileset
);
1856 if (ret
!= -EAGAIN
) {
1858 *lastblock
= last
[i
];
1863 /* Finally try block 512 in case media is open */
1864 return udf_check_anchor_block(sb
, sbi
->s_session
+ 512, fileset
);
1868 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1869 * area specified by it. The function expects sbi->s_lastblock to be the last
1870 * block on the media.
1872 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1875 static int udf_find_anchor(struct super_block
*sb
,
1876 struct kernel_lb_addr
*fileset
)
1878 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1879 sector_t lastblock
= sbi
->s_last_block
;
1882 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1886 /* No anchor found? Try VARCONV conversion of block numbers */
1887 UDF_SET_FLAG(sb
, UDF_FLAG_VARCONV
);
1888 lastblock
= udf_variable_to_fixed(sbi
->s_last_block
);
1889 /* Firstly, we try to not convert number of the last block */
1890 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1894 lastblock
= sbi
->s_last_block
;
1895 /* Secondly, we try with converted number of the last block */
1896 ret
= udf_scan_anchors(sb
, &lastblock
, fileset
);
1898 /* VARCONV didn't help. Clear it. */
1899 UDF_CLEAR_FLAG(sb
, UDF_FLAG_VARCONV
);
1903 sbi
->s_last_block
= lastblock
;
1908 * Check Volume Structure Descriptor, find Anchor block and load Volume
1909 * Descriptor Sequence.
1911 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1912 * block was not found.
1914 static int udf_load_vrs(struct super_block
*sb
, struct udf_options
*uopt
,
1915 int silent
, struct kernel_lb_addr
*fileset
)
1917 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1921 if (!sb_set_blocksize(sb
, uopt
->blocksize
)) {
1923 udf_warn(sb
, "Bad block size\n");
1926 sbi
->s_last_block
= uopt
->lastblock
;
1928 /* Check that it is NSR02 compliant */
1929 nsr_off
= udf_check_vsd(sb
);
1932 udf_warn(sb
, "No VRS found\n");
1936 udf_debug("Failed to read sector at offset %d. "
1937 "Assuming open disc. Skipping validity "
1938 "check\n", VSD_FIRST_SECTOR_OFFSET
);
1939 if (!sbi
->s_last_block
)
1940 sbi
->s_last_block
= udf_get_last_block(sb
);
1942 udf_debug("Validity check skipped because of novrs option\n");
1945 /* Look for anchor block and load Volume Descriptor Sequence */
1946 sbi
->s_anchor
= uopt
->anchor
;
1947 ret
= udf_find_anchor(sb
, fileset
);
1949 if (!silent
&& ret
== -EAGAIN
)
1950 udf_warn(sb
, "No anchor found\n");
1956 static void udf_finalize_lvid(struct logicalVolIntegrityDesc
*lvid
)
1958 struct timespec64 ts
;
1960 ktime_get_real_ts64(&ts
);
1961 udf_time_to_disk_stamp(&lvid
->recordingDateAndTime
, ts
);
1962 lvid
->descTag
.descCRC
= cpu_to_le16(
1963 crc_itu_t(0, (char *)lvid
+ sizeof(struct tag
),
1964 le16_to_cpu(lvid
->descTag
.descCRCLength
)));
1965 lvid
->descTag
.tagChecksum
= udf_tag_checksum(&lvid
->descTag
);
1968 static void udf_open_lvid(struct super_block
*sb
)
1970 struct udf_sb_info
*sbi
= UDF_SB(sb
);
1971 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
1972 struct logicalVolIntegrityDesc
*lvid
;
1973 struct logicalVolIntegrityDescImpUse
*lvidiu
;
1977 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1978 lvidiu
= udf_sb_lvidiu(sb
);
1982 mutex_lock(&sbi
->s_alloc_mutex
);
1983 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
1984 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
1985 if (le32_to_cpu(lvid
->integrityType
) == LVID_INTEGRITY_TYPE_CLOSE
)
1986 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN
);
1988 UDF_SET_FLAG(sb
, UDF_FLAG_INCONSISTENT
);
1990 udf_finalize_lvid(lvid
);
1991 mark_buffer_dirty(bh
);
1992 sbi
->s_lvid_dirty
= 0;
1993 mutex_unlock(&sbi
->s_alloc_mutex
);
1994 /* Make opening of filesystem visible on the media immediately */
1995 sync_dirty_buffer(bh
);
1998 static void udf_close_lvid(struct super_block
*sb
)
2000 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2001 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
2002 struct logicalVolIntegrityDesc
*lvid
;
2003 struct logicalVolIntegrityDescImpUse
*lvidiu
;
2007 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2008 lvidiu
= udf_sb_lvidiu(sb
);
2012 mutex_lock(&sbi
->s_alloc_mutex
);
2013 lvidiu
->impIdent
.identSuffix
[0] = UDF_OS_CLASS_UNIX
;
2014 lvidiu
->impIdent
.identSuffix
[1] = UDF_OS_ID_LINUX
;
2015 if (UDF_MAX_WRITE_VERSION
> le16_to_cpu(lvidiu
->maxUDFWriteRev
))
2016 lvidiu
->maxUDFWriteRev
= cpu_to_le16(UDF_MAX_WRITE_VERSION
);
2017 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFReadRev
))
2018 lvidiu
->minUDFReadRev
= cpu_to_le16(sbi
->s_udfrev
);
2019 if (sbi
->s_udfrev
> le16_to_cpu(lvidiu
->minUDFWriteRev
))
2020 lvidiu
->minUDFWriteRev
= cpu_to_le16(sbi
->s_udfrev
);
2021 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_INCONSISTENT
))
2022 lvid
->integrityType
= cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE
);
2025 * We set buffer uptodate unconditionally here to avoid spurious
2026 * warnings from mark_buffer_dirty() when previous EIO has marked
2027 * the buffer as !uptodate
2029 set_buffer_uptodate(bh
);
2030 udf_finalize_lvid(lvid
);
2031 mark_buffer_dirty(bh
);
2032 sbi
->s_lvid_dirty
= 0;
2033 mutex_unlock(&sbi
->s_alloc_mutex
);
2034 /* Make closing of filesystem visible on the media immediately */
2035 sync_dirty_buffer(bh
);
2038 u64
lvid_get_unique_id(struct super_block
*sb
)
2040 struct buffer_head
*bh
;
2041 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2042 struct logicalVolIntegrityDesc
*lvid
;
2043 struct logicalVolHeaderDesc
*lvhd
;
2047 bh
= sbi
->s_lvid_bh
;
2051 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2052 lvhd
= (struct logicalVolHeaderDesc
*)lvid
->logicalVolContentsUse
;
2054 mutex_lock(&sbi
->s_alloc_mutex
);
2055 ret
= uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
2056 if (!(++uniqueID
& 0xFFFFFFFF))
2058 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
2059 udf_updated_lvid(sb
);
2060 mutex_unlock(&sbi
->s_alloc_mutex
);
2065 static int udf_fill_super(struct super_block
*sb
, void *options
, int silent
)
2068 struct inode
*inode
= NULL
;
2069 struct udf_options uopt
;
2070 struct kernel_lb_addr rootdir
, fileset
;
2071 struct udf_sb_info
*sbi
;
2072 bool lvid_open
= false;
2074 uopt
.flags
= (1 << UDF_FLAG_USE_AD_IN_ICB
) | (1 << UDF_FLAG_STRICT
);
2075 /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */
2076 uopt
.uid
= make_kuid(current_user_ns(), overflowuid
);
2077 uopt
.gid
= make_kgid(current_user_ns(), overflowgid
);
2079 uopt
.fmode
= UDF_INVALID_MODE
;
2080 uopt
.dmode
= UDF_INVALID_MODE
;
2081 uopt
.nls_map
= NULL
;
2083 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
2087 sb
->s_fs_info
= sbi
;
2089 mutex_init(&sbi
->s_alloc_mutex
);
2091 if (!udf_parse_options((char *)options
, &uopt
, false))
2092 goto parse_options_failure
;
2094 if (uopt
.flags
& (1 << UDF_FLAG_UTF8
) &&
2095 uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) {
2096 udf_err(sb
, "utf8 cannot be combined with iocharset\n");
2097 goto parse_options_failure
;
2099 if ((uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)) && !uopt
.nls_map
) {
2100 uopt
.nls_map
= load_nls_default();
2102 uopt
.flags
&= ~(1 << UDF_FLAG_NLS_MAP
);
2104 udf_debug("Using default NLS map\n");
2106 if (!(uopt
.flags
& (1 << UDF_FLAG_NLS_MAP
)))
2107 uopt
.flags
|= (1 << UDF_FLAG_UTF8
);
2109 fileset
.logicalBlockNum
= 0xFFFFFFFF;
2110 fileset
.partitionReferenceNum
= 0xFFFF;
2112 sbi
->s_flags
= uopt
.flags
;
2113 sbi
->s_uid
= uopt
.uid
;
2114 sbi
->s_gid
= uopt
.gid
;
2115 sbi
->s_umask
= uopt
.umask
;
2116 sbi
->s_fmode
= uopt
.fmode
;
2117 sbi
->s_dmode
= uopt
.dmode
;
2118 sbi
->s_nls_map
= uopt
.nls_map
;
2119 rwlock_init(&sbi
->s_cred_lock
);
2121 if (uopt
.session
== 0xFFFFFFFF)
2122 sbi
->s_session
= udf_get_last_session(sb
);
2124 sbi
->s_session
= uopt
.session
;
2126 udf_debug("Multi-session=%d\n", sbi
->s_session
);
2128 /* Fill in the rest of the superblock */
2129 sb
->s_op
= &udf_sb_ops
;
2130 sb
->s_export_op
= &udf_export_ops
;
2132 sb
->s_magic
= UDF_SUPER_MAGIC
;
2133 sb
->s_time_gran
= 1000;
2135 if (uopt
.flags
& (1 << UDF_FLAG_BLOCKSIZE_SET
)) {
2136 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2138 uopt
.blocksize
= bdev_logical_block_size(sb
->s_bdev
);
2139 while (uopt
.blocksize
<= 4096) {
2140 ret
= udf_load_vrs(sb
, &uopt
, silent
, &fileset
);
2142 if (!silent
&& ret
!= -EACCES
) {
2143 pr_notice("Scanning with blocksize %u failed\n",
2146 brelse(sbi
->s_lvid_bh
);
2147 sbi
->s_lvid_bh
= NULL
;
2149 * EACCES is special - we want to propagate to
2150 * upper layers that we cannot handle RW mount.
2157 uopt
.blocksize
<<= 1;
2161 if (ret
== -EAGAIN
) {
2162 udf_warn(sb
, "No partition found (1)\n");
2168 udf_debug("Lastblock=%u\n", sbi
->s_last_block
);
2170 if (sbi
->s_lvid_bh
) {
2171 struct logicalVolIntegrityDescImpUse
*lvidiu
=
2173 uint16_t minUDFReadRev
;
2174 uint16_t minUDFWriteRev
;
2180 minUDFReadRev
= le16_to_cpu(lvidiu
->minUDFReadRev
);
2181 minUDFWriteRev
= le16_to_cpu(lvidiu
->minUDFWriteRev
);
2182 if (minUDFReadRev
> UDF_MAX_READ_VERSION
) {
2183 udf_err(sb
, "minUDFReadRev=%x (max is %x)\n",
2185 UDF_MAX_READ_VERSION
);
2188 } else if (minUDFWriteRev
> UDF_MAX_WRITE_VERSION
) {
2189 if (!sb_rdonly(sb
)) {
2193 UDF_SET_FLAG(sb
, UDF_FLAG_RW_INCOMPAT
);
2196 sbi
->s_udfrev
= minUDFWriteRev
;
2198 if (minUDFReadRev
>= UDF_VERS_USE_EXTENDED_FE
)
2199 UDF_SET_FLAG(sb
, UDF_FLAG_USE_EXTENDED_FE
);
2200 if (minUDFReadRev
>= UDF_VERS_USE_STREAMS
)
2201 UDF_SET_FLAG(sb
, UDF_FLAG_USE_STREAMS
);
2204 if (!sbi
->s_partitions
) {
2205 udf_warn(sb
, "No partition found (2)\n");
2210 if (sbi
->s_partmaps
[sbi
->s_partition
].s_partition_flags
&
2211 UDF_PART_FLAG_READ_ONLY
) {
2212 if (!sb_rdonly(sb
)) {
2216 UDF_SET_FLAG(sb
, UDF_FLAG_RW_INCOMPAT
);
2219 if (udf_find_fileset(sb
, &fileset
, &rootdir
)) {
2220 udf_warn(sb
, "No fileset found\n");
2226 struct timestamp ts
;
2227 udf_time_to_disk_stamp(&ts
, sbi
->s_record_time
);
2228 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2229 sbi
->s_volume_ident
,
2230 le16_to_cpu(ts
.year
), ts
.month
, ts
.day
,
2231 ts
.hour
, ts
.minute
, le16_to_cpu(ts
.typeAndTimezone
));
2233 if (!sb_rdonly(sb
)) {
2238 /* Assign the root inode */
2239 /* assign inodes by physical block number */
2240 /* perhaps it's not extensible enough, but for now ... */
2241 inode
= udf_iget(sb
, &rootdir
);
2242 if (IS_ERR(inode
)) {
2243 udf_err(sb
, "Error in udf_iget, block=%u, partition=%u\n",
2244 rootdir
.logicalBlockNum
, rootdir
.partitionReferenceNum
);
2245 ret
= PTR_ERR(inode
);
2249 /* Allocate a dentry for the root inode */
2250 sb
->s_root
= d_make_root(inode
);
2252 udf_err(sb
, "Couldn't allocate root dentry\n");
2256 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
2257 sb
->s_max_links
= UDF_MAX_LINKS
;
2261 iput(sbi
->s_vat_inode
);
2262 parse_options_failure
:
2264 unload_nls(uopt
.nls_map
);
2267 brelse(sbi
->s_lvid_bh
);
2268 udf_sb_free_partitions(sb
);
2270 sb
->s_fs_info
= NULL
;
2275 void _udf_err(struct super_block
*sb
, const char *function
,
2276 const char *fmt
, ...)
2278 struct va_format vaf
;
2281 va_start(args
, fmt
);
2286 pr_err("error (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2291 void _udf_warn(struct super_block
*sb
, const char *function
,
2292 const char *fmt
, ...)
2294 struct va_format vaf
;
2297 va_start(args
, fmt
);
2302 pr_warn("warning (device %s): %s: %pV", sb
->s_id
, function
, &vaf
);
2307 static void udf_put_super(struct super_block
*sb
)
2309 struct udf_sb_info
*sbi
;
2313 iput(sbi
->s_vat_inode
);
2314 if (UDF_QUERY_FLAG(sb
, UDF_FLAG_NLS_MAP
))
2315 unload_nls(sbi
->s_nls_map
);
2318 brelse(sbi
->s_lvid_bh
);
2319 udf_sb_free_partitions(sb
);
2320 mutex_destroy(&sbi
->s_alloc_mutex
);
2321 kfree(sb
->s_fs_info
);
2322 sb
->s_fs_info
= NULL
;
2325 static int udf_sync_fs(struct super_block
*sb
, int wait
)
2327 struct udf_sb_info
*sbi
= UDF_SB(sb
);
2329 mutex_lock(&sbi
->s_alloc_mutex
);
2330 if (sbi
->s_lvid_dirty
) {
2331 struct buffer_head
*bh
= sbi
->s_lvid_bh
;
2332 struct logicalVolIntegrityDesc
*lvid
;
2334 lvid
= (struct logicalVolIntegrityDesc
*)bh
->b_data
;
2335 udf_finalize_lvid(lvid
);
2338 * Blockdevice will be synced later so we don't have to submit
2341 mark_buffer_dirty(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
;
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 udf_pblk_t 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
);
2479 if (map
->s_partition_flags
& UDF_PART_FLAG_UNALLOC_TABLE
) {
2480 accum
+= udf_count_free_table(sb
,
2481 map
->s_uspace
.s_table
);
2486 MODULE_AUTHOR("Ben Fennema");
2487 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2488 MODULE_LICENSE("GPL");
2489 module_init(init_udf_fs
)
2490 module_exit(exit_udf_fs
)