5 * Inode name handling routines for the OSTA-UDF(tm) filesystem.
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
13 * (C) 1998-2004 Ben Fennema
14 * (C) 1999-2000 Stelias Computing Inc
18 * 12/12/98 blf Created. Split out the lookup code from dir.c
19 * 04/19/99 blf link, mknod, symlink support
26 #include <linux/string.h>
27 #include <linux/errno.h>
29 #include <linux/slab.h>
30 #include <linux/quotaops.h>
31 #include <linux/smp_lock.h>
32 #include <linux/buffer_head.h>
33 #include <linux/sched.h>
35 static inline int udf_match(int len1
, const char *name1
, int len2
,
41 return !memcmp(name1
, name2
, len1
);
44 int udf_write_fi(struct inode
*inode
, struct fileIdentDesc
*cfi
,
45 struct fileIdentDesc
*sfi
, struct udf_fileident_bh
*fibh
,
46 uint8_t *impuse
, uint8_t *fileident
)
48 uint16_t crclen
= fibh
->eoffset
- fibh
->soffset
- sizeof(tag
);
51 uint16_t liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
52 uint8_t lfi
= cfi
->lengthFileIdent
;
53 int padlen
= fibh
->eoffset
- fibh
->soffset
- liu
- lfi
-
54 sizeof(struct fileIdentDesc
);
57 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
60 offset
= fibh
->soffset
+ sizeof(struct fileIdentDesc
);
63 if (adinicb
|| (offset
+ liu
< 0)) {
64 memcpy((uint8_t *)sfi
->impUse
, impuse
, liu
);
65 } else if (offset
>= 0) {
66 memcpy(fibh
->ebh
->b_data
+ offset
, impuse
, liu
);
68 memcpy((uint8_t *)sfi
->impUse
, impuse
, -offset
);
69 memcpy(fibh
->ebh
->b_data
, impuse
- offset
,
77 if (adinicb
|| (offset
+ lfi
< 0)) {
78 memcpy((uint8_t *)sfi
->fileIdent
+ liu
, fileident
, lfi
);
79 } else if (offset
>= 0) {
80 memcpy(fibh
->ebh
->b_data
+ offset
, fileident
, lfi
);
82 memcpy((uint8_t *)sfi
->fileIdent
+ liu
, fileident
,
84 memcpy(fibh
->ebh
->b_data
, fileident
- offset
,
91 if (adinicb
|| (offset
+ padlen
< 0)) {
92 memset((uint8_t *)sfi
->padding
+ liu
+ lfi
, 0x00, padlen
);
93 } else if (offset
>= 0) {
94 memset(fibh
->ebh
->b_data
+ offset
, 0x00, padlen
);
96 memset((uint8_t *)sfi
->padding
+ liu
+ lfi
, 0x00, -offset
);
97 memset(fibh
->ebh
->b_data
, 0x00, padlen
+ offset
);
100 crc
= udf_crc((uint8_t *)cfi
+ sizeof(tag
),
101 sizeof(struct fileIdentDesc
) - sizeof(tag
), 0);
103 if (fibh
->sbh
== fibh
->ebh
) {
104 crc
= udf_crc((uint8_t *)sfi
->impUse
,
105 crclen
+ sizeof(tag
) -
106 sizeof(struct fileIdentDesc
), crc
);
107 } else if (sizeof(struct fileIdentDesc
) >= -fibh
->soffset
) {
108 crc
= udf_crc(fibh
->ebh
->b_data
+
109 sizeof(struct fileIdentDesc
) +
111 crclen
+ sizeof(tag
) -
112 sizeof(struct fileIdentDesc
),
115 crc
= udf_crc((uint8_t *)sfi
->impUse
,
116 -fibh
->soffset
- sizeof(struct fileIdentDesc
),
118 crc
= udf_crc(fibh
->ebh
->b_data
, fibh
->eoffset
, crc
);
121 cfi
->descTag
.descCRC
= cpu_to_le16(crc
);
122 cfi
->descTag
.descCRCLength
= cpu_to_le16(crclen
);
123 cfi
->descTag
.tagChecksum
= udf_tag_checksum(&cfi
->descTag
);
125 if (adinicb
|| (sizeof(struct fileIdentDesc
) <= -fibh
->soffset
)) {
126 memcpy((uint8_t *)sfi
, (uint8_t *)cfi
,
127 sizeof(struct fileIdentDesc
));
129 memcpy((uint8_t *)sfi
, (uint8_t *)cfi
, -fibh
->soffset
);
130 memcpy(fibh
->ebh
->b_data
, (uint8_t *)cfi
- fibh
->soffset
,
131 sizeof(struct fileIdentDesc
) + fibh
->soffset
);
135 mark_inode_dirty(inode
);
137 if (fibh
->sbh
!= fibh
->ebh
)
138 mark_buffer_dirty_inode(fibh
->ebh
, inode
);
139 mark_buffer_dirty_inode(fibh
->sbh
, inode
);
144 static struct fileIdentDesc
*udf_find_entry(struct inode
*dir
,
145 struct dentry
*dentry
,
146 struct udf_fileident_bh
*fibh
,
147 struct fileIdentDesc
*cfi
)
149 struct fileIdentDesc
*fi
= NULL
;
152 char fname
[UDF_NAME_LEN
];
160 struct extent_position epos
= {};
161 struct udf_inode_info
*dinfo
= UDF_I(dir
);
163 size
= udf_ext0_offset(dir
) + dir
->i_size
;
164 f_pos
= udf_ext0_offset(dir
);
166 fibh
->soffset
= fibh
->eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
167 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
168 fibh
->sbh
= fibh
->ebh
= NULL
;
169 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
170 &epos
, &eloc
, &elen
, &offset
) ==
171 (EXT_RECORDED_ALLOCATED
>> 30)) {
172 block
= udf_get_lb_pblock(dir
->i_sb
, eloc
, offset
);
173 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
174 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
175 epos
.offset
-= sizeof(short_ad
);
176 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
177 epos
.offset
-= sizeof(long_ad
);
181 fibh
->sbh
= fibh
->ebh
= udf_tread(dir
->i_sb
, block
);
191 while (f_pos
< size
) {
192 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
195 if (fibh
->sbh
!= fibh
->ebh
)
202 liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
203 lfi
= cfi
->lengthFileIdent
;
205 if (fibh
->sbh
== fibh
->ebh
) {
206 nameptr
= fi
->fileIdent
+ liu
;
208 int poffset
; /* Unpaded ending offset */
210 poffset
= fibh
->soffset
+ sizeof(struct fileIdentDesc
) +
214 nameptr
= (uint8_t *)(fibh
->ebh
->b_data
+
218 memcpy(nameptr
, fi
->fileIdent
+ liu
,
220 memcpy(nameptr
+ lfi
- poffset
,
221 fibh
->ebh
->b_data
, poffset
);
225 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
226 if (!UDF_QUERY_FLAG(dir
->i_sb
, UDF_FLAG_UNDELETE
))
230 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_HIDDEN
) != 0) {
231 if (!UDF_QUERY_FLAG(dir
->i_sb
, UDF_FLAG_UNHIDE
))
238 flen
= udf_get_filename(dir
->i_sb
, nameptr
, fname
, lfi
);
239 if (flen
&& udf_match(flen
, fname
, dentry
->d_name
.len
,
240 dentry
->d_name
.name
)) {
246 if (fibh
->sbh
!= fibh
->ebh
)
254 static struct dentry
*udf_lookup(struct inode
*dir
, struct dentry
*dentry
,
255 struct nameidata
*nd
)
257 struct inode
*inode
= NULL
;
258 struct fileIdentDesc cfi
;
259 struct udf_fileident_bh fibh
;
261 if (dentry
->d_name
.len
> UDF_NAME_LEN
- 2)
262 return ERR_PTR(-ENAMETOOLONG
);
266 /* temporary shorthand for specifying files by inode number */
267 if (!strncmp(dentry
->d_name
.name
, ".B=", 3)) {
268 kernel_lb_addr lb
= {
269 .logicalBlockNum
= 0,
270 .partitionReferenceNum
=
271 simple_strtoul(dentry
->d_name
.name
+ 3,
274 inode
= udf_iget(dir
->i_sb
, lb
);
277 return ERR_PTR(-EACCES
);
280 #endif /* UDF_RECOVERY */
282 if (udf_find_entry(dir
, dentry
, &fibh
, &cfi
)) {
283 if (fibh
.sbh
!= fibh
.ebh
)
287 inode
= udf_iget(dir
->i_sb
, lelb_to_cpu(cfi
.icb
.extLocation
));
290 return ERR_PTR(-EACCES
);
294 d_add(dentry
, inode
);
299 static struct fileIdentDesc
*udf_add_entry(struct inode
*dir
,
300 struct dentry
*dentry
,
301 struct udf_fileident_bh
*fibh
,
302 struct fileIdentDesc
*cfi
, int *err
)
304 struct super_block
*sb
= dir
->i_sb
;
305 struct fileIdentDesc
*fi
= NULL
;
306 char name
[UDF_NAME_LEN
], fname
[UDF_NAME_LEN
];
311 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
319 struct extent_position epos
= {};
320 struct udf_inode_info
*dinfo
;
323 if (!dentry
->d_name
.len
) {
327 namelen
= udf_put_filename(sb
, dentry
->d_name
.name
, name
,
330 *err
= -ENAMETOOLONG
;
337 nfidlen
= (sizeof(struct fileIdentDesc
) + namelen
+ 3) & ~3;
339 f_pos
= udf_ext0_offset(dir
);
341 fibh
->soffset
= fibh
->eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
343 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
344 fibh
->sbh
= fibh
->ebh
= NULL
;
345 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
346 &epos
, &eloc
, &elen
, &offset
) ==
347 (EXT_RECORDED_ALLOCATED
>> 30)) {
348 block
= udf_get_lb_pblock(dir
->i_sb
, eloc
, offset
);
349 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
350 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
351 epos
.offset
-= sizeof(short_ad
);
352 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
353 epos
.offset
-= sizeof(long_ad
);
357 fibh
->sbh
= fibh
->ebh
= udf_tread(dir
->i_sb
, block
);
364 block
= dinfo
->i_location
.logicalBlockNum
;
366 block
= udf_get_lb_pblock(dir
->i_sb
, dinfo
->i_location
, 0);
367 fibh
->sbh
= fibh
->ebh
= NULL
;
368 fibh
->soffset
= fibh
->eoffset
= sb
->s_blocksize
;
372 while (f_pos
< size
) {
373 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
377 if (fibh
->sbh
!= fibh
->ebh
)
385 liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
386 lfi
= cfi
->lengthFileIdent
;
388 if (fibh
->sbh
== fibh
->ebh
)
389 nameptr
= fi
->fileIdent
+ liu
;
391 int poffset
; /* Unpaded ending offset */
393 poffset
= fibh
->soffset
+ sizeof(struct fileIdentDesc
) +
397 nameptr
= (char *)(fibh
->ebh
->b_data
+
401 memcpy(nameptr
, fi
->fileIdent
+ liu
,
403 memcpy(nameptr
+ lfi
- poffset
,
404 fibh
->ebh
->b_data
, poffset
);
408 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
409 if (((sizeof(struct fileIdentDesc
) +
410 liu
+ lfi
+ 3) & ~3) == nfidlen
) {
412 cfi
->descTag
.tagSerialNum
= cpu_to_le16(1);
413 cfi
->fileVersionNum
= cpu_to_le16(1);
414 cfi
->fileCharacteristics
= 0;
415 cfi
->lengthFileIdent
= namelen
;
416 cfi
->lengthOfImpUse
= cpu_to_le16(0);
417 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
,
430 flen
= udf_get_filename(dir
->i_sb
, nameptr
, fname
, lfi
);
431 if (flen
&& udf_match(flen
, fname
, dentry
->d_name
.len
,
432 dentry
->d_name
.name
)) {
433 if (fibh
->sbh
!= fibh
->ebh
)
443 if (dinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
444 elen
= (elen
+ sb
->s_blocksize
- 1) & ~(sb
->s_blocksize
- 1);
445 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
446 epos
.offset
-= sizeof(short_ad
);
447 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
448 epos
.offset
-= sizeof(long_ad
);
449 udf_write_aext(dir
, &epos
, eloc
, elen
, 1);
453 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
&&
454 sb
->s_blocksize
- fibh
->eoffset
< nfidlen
) {
457 fibh
->soffset
-= udf_ext0_offset(dir
);
458 fibh
->eoffset
-= udf_ext0_offset(dir
);
459 f_pos
-= udf_ext0_offset(dir
);
460 if (fibh
->sbh
!= fibh
->ebh
)
463 fibh
->sbh
= fibh
->ebh
=
464 udf_expand_dir_adinicb(dir
, &block
, err
);
467 epos
.block
= dinfo
->i_location
;
468 epos
.offset
= udf_file_entry_alloc_offset(dir
);
469 /* Load extent udf_expand_dir_adinicb() has created */
470 udf_current_aext(dir
, &epos
, &eloc
, &elen
, 1);
473 if (sb
->s_blocksize
- fibh
->eoffset
>= nfidlen
) {
474 fibh
->soffset
= fibh
->eoffset
;
475 fibh
->eoffset
+= nfidlen
;
476 if (fibh
->sbh
!= fibh
->ebh
) {
478 fibh
->sbh
= fibh
->ebh
;
481 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
482 block
= dinfo
->i_location
.logicalBlockNum
;
483 fi
= (struct fileIdentDesc
*)
484 (dinfo
->i_ext
.i_data
+
486 udf_ext0_offset(dir
) +
489 block
= eloc
.logicalBlockNum
+
491 dir
->i_sb
->s_blocksize_bits
);
492 fi
= (struct fileIdentDesc
*)
493 (fibh
->sbh
->b_data
+ fibh
->soffset
);
496 fibh
->soffset
= fibh
->eoffset
- sb
->s_blocksize
;
497 fibh
->eoffset
+= nfidlen
- sb
->s_blocksize
;
498 if (fibh
->sbh
!= fibh
->ebh
) {
500 fibh
->sbh
= fibh
->ebh
;
503 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
504 dir
->i_sb
->s_blocksize_bits
);
505 fibh
->ebh
= udf_bread(dir
,
506 f_pos
>> dir
->i_sb
->s_blocksize_bits
, 1, err
);
513 if (!fibh
->soffset
) {
514 if (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
515 (EXT_RECORDED_ALLOCATED
>> 30)) {
516 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
517 dir
->i_sb
->s_blocksize_bits
);
522 fibh
->sbh
= fibh
->ebh
;
523 fi
= (struct fileIdentDesc
*)(fibh
->sbh
->b_data
);
525 fi
= (struct fileIdentDesc
*)
526 (fibh
->sbh
->b_data
+ sb
->s_blocksize
+
531 memset(cfi
, 0, sizeof(struct fileIdentDesc
));
532 if (UDF_SB(sb
)->s_udfrev
>= 0x0200)
533 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 3, 1, block
,
536 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 2, 1, block
,
538 cfi
->fileVersionNum
= cpu_to_le16(1);
539 cfi
->lengthFileIdent
= namelen
;
540 cfi
->lengthOfImpUse
= cpu_to_le16(0);
541 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
, name
)) {
543 dir
->i_size
+= nfidlen
;
544 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
545 dinfo
->i_lenAlloc
+= nfidlen
;
546 mark_inode_dirty(dir
);
550 if (fibh
->sbh
!= fibh
->ebh
)
558 static int udf_delete_entry(struct inode
*inode
, struct fileIdentDesc
*fi
,
559 struct udf_fileident_bh
*fibh
,
560 struct fileIdentDesc
*cfi
)
562 cfi
->fileCharacteristics
|= FID_FILE_CHAR_DELETED
;
564 if (UDF_QUERY_FLAG(inode
->i_sb
, UDF_FLAG_STRICT
))
565 memset(&(cfi
->icb
), 0x00, sizeof(long_ad
));
567 return udf_write_fi(inode
, cfi
, fi
, fibh
, NULL
, NULL
);
570 static int udf_create(struct inode
*dir
, struct dentry
*dentry
, int mode
,
571 struct nameidata
*nd
)
573 struct udf_fileident_bh fibh
;
575 struct fileIdentDesc cfi
, *fi
;
577 struct udf_inode_info
*iinfo
;
580 inode
= udf_new_inode(dir
, mode
, &err
);
586 iinfo
= UDF_I(inode
);
587 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
588 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
590 inode
->i_data
.a_ops
= &udf_aops
;
591 inode
->i_op
= &udf_file_inode_operations
;
592 inode
->i_fop
= &udf_file_operations
;
593 inode
->i_mode
= mode
;
594 mark_inode_dirty(inode
);
596 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
599 mark_inode_dirty(inode
);
604 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
605 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
606 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
607 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
608 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
609 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
610 mark_inode_dirty(dir
);
611 if (fibh
.sbh
!= fibh
.ebh
)
615 d_instantiate(dentry
, inode
);
620 static int udf_mknod(struct inode
*dir
, struct dentry
*dentry
, int mode
,
624 struct udf_fileident_bh fibh
;
625 struct fileIdentDesc cfi
, *fi
;
627 struct udf_inode_info
*iinfo
;
629 if (!old_valid_dev(rdev
))
634 inode
= udf_new_inode(dir
, mode
, &err
);
638 iinfo
= UDF_I(inode
);
639 inode
->i_uid
= current
->fsuid
;
640 init_special_inode(inode
, mode
, rdev
);
641 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
644 mark_inode_dirty(inode
);
649 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
650 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
651 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
652 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
653 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
654 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
655 mark_inode_dirty(dir
);
656 mark_inode_dirty(inode
);
658 if (fibh
.sbh
!= fibh
.ebh
)
661 d_instantiate(dentry
, inode
);
669 static int udf_mkdir(struct inode
*dir
, struct dentry
*dentry
, int mode
)
672 struct udf_fileident_bh fibh
;
673 struct fileIdentDesc cfi
, *fi
;
675 struct udf_inode_info
*dinfo
= UDF_I(dir
);
676 struct udf_inode_info
*iinfo
;
680 if (dir
->i_nlink
>= (256 << sizeof(dir
->i_nlink
)) - 1)
684 inode
= udf_new_inode(dir
, S_IFDIR
, &err
);
688 iinfo
= UDF_I(inode
);
689 inode
->i_op
= &udf_dir_inode_operations
;
690 inode
->i_fop
= &udf_dir_operations
;
691 fi
= udf_add_entry(inode
, NULL
, &fibh
, &cfi
, &err
);
694 mark_inode_dirty(inode
);
699 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
700 cfi
.icb
.extLocation
= cpu_to_lelb(dinfo
->i_location
);
701 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
702 cpu_to_le32(dinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
703 cfi
.fileCharacteristics
=
704 FID_FILE_CHAR_DIRECTORY
| FID_FILE_CHAR_PARENT
;
705 udf_write_fi(inode
, &cfi
, fi
, &fibh
, NULL
, NULL
);
707 inode
->i_mode
= S_IFDIR
| mode
;
708 if (dir
->i_mode
& S_ISGID
)
709 inode
->i_mode
|= S_ISGID
;
710 mark_inode_dirty(inode
);
712 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
715 mark_inode_dirty(inode
);
719 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
720 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
721 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
722 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
723 cfi
.fileCharacteristics
|= FID_FILE_CHAR_DIRECTORY
;
724 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
726 mark_inode_dirty(dir
);
727 d_instantiate(dentry
, inode
);
728 if (fibh
.sbh
!= fibh
.ebh
)
738 static int empty_dir(struct inode
*dir
)
740 struct fileIdentDesc
*fi
, cfi
;
741 struct udf_fileident_bh fibh
;
743 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
748 struct extent_position epos
= {};
749 struct udf_inode_info
*dinfo
= UDF_I(dir
);
751 f_pos
= udf_ext0_offset(dir
);
752 fibh
.soffset
= fibh
.eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
754 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
755 fibh
.sbh
= fibh
.ebh
= NULL
;
756 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
757 &epos
, &eloc
, &elen
, &offset
) ==
758 (EXT_RECORDED_ALLOCATED
>> 30)) {
759 block
= udf_get_lb_pblock(dir
->i_sb
, eloc
, offset
);
760 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
761 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
762 epos
.offset
-= sizeof(short_ad
);
763 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
764 epos
.offset
-= sizeof(long_ad
);
768 fibh
.sbh
= fibh
.ebh
= udf_tread(dir
->i_sb
, block
);
778 while (f_pos
< size
) {
779 fi
= udf_fileident_read(dir
, &f_pos
, &fibh
, &cfi
, &epos
, &eloc
,
782 if (fibh
.sbh
!= fibh
.ebh
)
789 if (cfi
.lengthFileIdent
&&
790 (cfi
.fileCharacteristics
& FID_FILE_CHAR_DELETED
) == 0) {
791 if (fibh
.sbh
!= fibh
.ebh
)
799 if (fibh
.sbh
!= fibh
.ebh
)
807 static int udf_rmdir(struct inode
*dir
, struct dentry
*dentry
)
810 struct inode
*inode
= dentry
->d_inode
;
811 struct udf_fileident_bh fibh
;
812 struct fileIdentDesc
*fi
, cfi
;
817 fi
= udf_find_entry(dir
, dentry
, &fibh
, &cfi
);
822 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
823 if (udf_get_lb_pblock(dir
->i_sb
, tloc
, 0) != inode
->i_ino
)
826 if (!empty_dir(inode
))
828 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
831 if (inode
->i_nlink
!= 2)
832 udf_warning(inode
->i_sb
, "udf_rmdir",
833 "empty directory has nlink != 2 (%d)",
837 inode_dec_link_count(dir
);
838 inode
->i_ctime
= dir
->i_ctime
= dir
->i_mtime
=
839 current_fs_time(dir
->i_sb
);
840 mark_inode_dirty(dir
);
843 if (fibh
.sbh
!= fibh
.ebh
)
852 static int udf_unlink(struct inode
*dir
, struct dentry
*dentry
)
855 struct inode
*inode
= dentry
->d_inode
;
856 struct udf_fileident_bh fibh
;
857 struct fileIdentDesc
*fi
;
858 struct fileIdentDesc cfi
;
863 fi
= udf_find_entry(dir
, dentry
, &fibh
, &cfi
);
868 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
869 if (udf_get_lb_pblock(dir
->i_sb
, tloc
, 0) != inode
->i_ino
)
872 if (!inode
->i_nlink
) {
873 udf_debug("Deleting nonexistent file (%lu), %d\n",
874 inode
->i_ino
, inode
->i_nlink
);
877 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
880 dir
->i_ctime
= dir
->i_mtime
= current_fs_time(dir
->i_sb
);
881 mark_inode_dirty(dir
);
882 inode_dec_link_count(inode
);
883 inode
->i_ctime
= dir
->i_ctime
;
887 if (fibh
.sbh
!= fibh
.ebh
)
896 static int udf_symlink(struct inode
*dir
, struct dentry
*dentry
,
900 struct pathComponent
*pc
;
902 struct udf_fileident_bh fibh
;
903 struct extent_position epos
= {};
904 int eoffset
, elen
= 0;
905 struct fileIdentDesc
*fi
;
906 struct fileIdentDesc cfi
;
910 char name
[UDF_NAME_LEN
];
912 struct buffer_head
*bh
;
913 struct udf_inode_info
*iinfo
;
916 inode
= udf_new_inode(dir
, S_IFLNK
, &err
);
920 iinfo
= UDF_I(inode
);
921 inode
->i_mode
= S_IFLNK
| S_IRWXUGO
;
922 inode
->i_data
.a_ops
= &udf_symlink_aops
;
923 inode
->i_op
= &page_symlink_inode_operations
;
925 if (iinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
929 block
= udf_new_block(inode
->i_sb
, inode
,
930 iinfo
->i_location
.partitionReferenceNum
,
931 iinfo
->i_location
.logicalBlockNum
, &err
);
934 epos
.block
= iinfo
->i_location
;
935 epos
.offset
= udf_file_entry_alloc_offset(inode
);
937 eloc
.logicalBlockNum
= block
;
938 eloc
.partitionReferenceNum
=
939 iinfo
->i_location
.partitionReferenceNum
;
940 elen
= inode
->i_sb
->s_blocksize
;
941 iinfo
->i_lenExtents
= elen
;
942 udf_add_aext(inode
, &epos
, eloc
, elen
, 0);
945 block
= udf_get_pblock(inode
->i_sb
, block
,
946 iinfo
->i_location
.partitionReferenceNum
,
948 epos
.bh
= udf_tread(inode
->i_sb
, block
);
949 lock_buffer(epos
.bh
);
950 memset(epos
.bh
->b_data
, 0x00, inode
->i_sb
->s_blocksize
);
951 set_buffer_uptodate(epos
.bh
);
952 unlock_buffer(epos
.bh
);
953 mark_buffer_dirty_inode(epos
.bh
, inode
);
954 ea
= epos
.bh
->b_data
+ udf_ext0_offset(inode
);
956 ea
= iinfo
->i_ext
.i_data
+ iinfo
->i_lenEAttr
;
958 eoffset
= inode
->i_sb
->s_blocksize
- udf_ext0_offset(inode
);
959 pc
= (struct pathComponent
*)ea
;
961 if (*symname
== '/') {
964 } while (*symname
== '/');
966 pc
->componentType
= 1;
967 pc
->lengthComponentIdent
= 0;
968 pc
->componentFileVersionNum
= 0;
969 pc
+= sizeof(struct pathComponent
);
970 elen
+= sizeof(struct pathComponent
);
976 if (elen
+ sizeof(struct pathComponent
) > eoffset
)
979 pc
= (struct pathComponent
*)(ea
+ elen
);
981 compstart
= (char *)symname
;
985 } while (*symname
&& *symname
!= '/');
987 pc
->componentType
= 5;
988 pc
->lengthComponentIdent
= 0;
989 pc
->componentFileVersionNum
= 0;
990 if (compstart
[0] == '.') {
991 if ((symname
- compstart
) == 1)
992 pc
->componentType
= 4;
993 else if ((symname
- compstart
) == 2 &&
995 pc
->componentType
= 3;
998 if (pc
->componentType
== 5) {
999 namelen
= udf_put_filename(inode
->i_sb
, compstart
, name
,
1000 symname
- compstart
);
1004 if (elen
+ sizeof(struct pathComponent
) + namelen
>
1008 pc
->lengthComponentIdent
= namelen
;
1010 memcpy(pc
->componentIdent
, name
, namelen
);
1013 elen
+= sizeof(struct pathComponent
) + pc
->lengthComponentIdent
;
1018 } while (*symname
== '/');
1023 inode
->i_size
= elen
;
1024 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1025 iinfo
->i_lenAlloc
= inode
->i_size
;
1026 mark_inode_dirty(inode
);
1028 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
1031 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
1032 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
1033 bh
= UDF_SB(inode
->i_sb
)->s_lvid_bh
;
1035 struct logicalVolIntegrityDesc
*lvid
=
1036 (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1037 struct logicalVolHeaderDesc
*lvhd
;
1039 lvhd
= (struct logicalVolHeaderDesc
*)
1040 lvid
->logicalVolContentsUse
;
1041 uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
1042 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
1043 cpu_to_le32(uniqueID
& 0x00000000FFFFFFFFUL
);
1044 if (!(++uniqueID
& 0x00000000FFFFFFFFUL
))
1046 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
1047 mark_buffer_dirty(bh
);
1049 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
1050 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1051 mark_inode_dirty(dir
);
1052 if (fibh
.sbh
!= fibh
.ebh
)
1055 d_instantiate(dentry
, inode
);
1063 inode_dec_link_count(inode
);
1068 static int udf_link(struct dentry
*old_dentry
, struct inode
*dir
,
1069 struct dentry
*dentry
)
1071 struct inode
*inode
= old_dentry
->d_inode
;
1072 struct udf_fileident_bh fibh
;
1073 struct fileIdentDesc cfi
, *fi
;
1075 struct buffer_head
*bh
;
1078 if (inode
->i_nlink
>= (256 << sizeof(inode
->i_nlink
)) - 1) {
1083 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
1088 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
1089 cfi
.icb
.extLocation
= cpu_to_lelb(UDF_I(inode
)->i_location
);
1090 bh
= UDF_SB(inode
->i_sb
)->s_lvid_bh
;
1092 struct logicalVolIntegrityDesc
*lvid
=
1093 (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1094 struct logicalVolHeaderDesc
*lvhd
;
1096 lvhd
= (struct logicalVolHeaderDesc
*)
1097 (lvid
->logicalVolContentsUse
);
1098 uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
1099 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
1100 cpu_to_le32(uniqueID
& 0x00000000FFFFFFFFUL
);
1101 if (!(++uniqueID
& 0x00000000FFFFFFFFUL
))
1103 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
1104 mark_buffer_dirty(bh
);
1106 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
1107 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1108 mark_inode_dirty(dir
);
1110 if (fibh
.sbh
!= fibh
.ebh
)
1114 inode
->i_ctime
= current_fs_time(inode
->i_sb
);
1115 mark_inode_dirty(inode
);
1116 atomic_inc(&inode
->i_count
);
1117 d_instantiate(dentry
, inode
);
1123 /* Anybody can rename anything with this: the permission checks are left to the
1124 * higher-level routines.
1126 static int udf_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1127 struct inode
*new_dir
, struct dentry
*new_dentry
)
1129 struct inode
*old_inode
= old_dentry
->d_inode
;
1130 struct inode
*new_inode
= new_dentry
->d_inode
;
1131 struct udf_fileident_bh ofibh
, nfibh
;
1132 struct fileIdentDesc
*ofi
= NULL
, *nfi
= NULL
, *dir_fi
= NULL
;
1133 struct fileIdentDesc ocfi
, ncfi
;
1134 struct buffer_head
*dir_bh
= NULL
;
1135 int retval
= -ENOENT
;
1136 kernel_lb_addr tloc
;
1137 struct udf_inode_info
*old_iinfo
= UDF_I(old_inode
);
1140 ofi
= udf_find_entry(old_dir
, old_dentry
, &ofibh
, &ocfi
);
1142 if (ofibh
.sbh
!= ofibh
.ebh
)
1146 tloc
= lelb_to_cpu(ocfi
.icb
.extLocation
);
1147 if (!ofi
|| udf_get_lb_pblock(old_dir
->i_sb
, tloc
, 0)
1148 != old_inode
->i_ino
)
1151 nfi
= udf_find_entry(new_dir
, new_dentry
, &nfibh
, &ncfi
);
1154 if (nfibh
.sbh
!= nfibh
.ebh
)
1160 if (S_ISDIR(old_inode
->i_mode
)) {
1161 int offset
= udf_ext0_offset(old_inode
);
1164 retval
= -ENOTEMPTY
;
1165 if (!empty_dir(new_inode
))
1169 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
1170 dir_fi
= udf_get_fileident(
1171 old_iinfo
->i_ext
.i_data
-
1173 sizeof(struct extendedFileEntry
) :
1174 sizeof(struct fileEntry
)),
1175 old_inode
->i_sb
->s_blocksize
, &offset
);
1177 dir_bh
= udf_bread(old_inode
, 0, 0, &retval
);
1180 dir_fi
= udf_get_fileident(dir_bh
->b_data
,
1181 old_inode
->i_sb
->s_blocksize
, &offset
);
1185 tloc
= lelb_to_cpu(dir_fi
->icb
.extLocation
);
1186 if (udf_get_lb_pblock(old_inode
->i_sb
, tloc
, 0) !=
1193 (256 << sizeof(new_dir
->i_nlink
)) - 1)
1197 nfi
= udf_add_entry(new_dir
, new_dentry
, &nfibh
, &ncfi
,
1204 * Like most other Unix systems, set the ctime for inodes on a
1207 old_inode
->i_ctime
= current_fs_time(old_inode
->i_sb
);
1208 mark_inode_dirty(old_inode
);
1213 ncfi
.fileVersionNum
= ocfi
.fileVersionNum
;
1214 ncfi
.fileCharacteristics
= ocfi
.fileCharacteristics
;
1215 memcpy(&(ncfi
.icb
), &(ocfi
.icb
), sizeof(long_ad
));
1216 udf_write_fi(new_dir
, &ncfi
, nfi
, &nfibh
, NULL
, NULL
);
1218 /* The old fid may have moved - find it again */
1219 ofi
= udf_find_entry(old_dir
, old_dentry
, &ofibh
, &ocfi
);
1220 udf_delete_entry(old_dir
, ofi
, &ofibh
, &ocfi
);
1223 new_inode
->i_ctime
= current_fs_time(new_inode
->i_sb
);
1224 inode_dec_link_count(new_inode
);
1226 old_dir
->i_ctime
= old_dir
->i_mtime
= current_fs_time(old_dir
->i_sb
);
1227 mark_inode_dirty(old_dir
);
1230 dir_fi
->icb
.extLocation
= cpu_to_lelb(UDF_I(new_dir
)->i_location
);
1231 udf_update_tag((char *)dir_fi
,
1232 (sizeof(struct fileIdentDesc
) +
1233 le16_to_cpu(dir_fi
->lengthOfImpUse
) + 3) & ~3);
1234 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1235 mark_inode_dirty(old_inode
);
1237 mark_buffer_dirty_inode(dir_bh
, old_inode
);
1239 inode_dec_link_count(old_dir
);
1241 inode_dec_link_count(new_inode
);
1244 mark_inode_dirty(new_dir
);
1249 if (ofibh
.sbh
!= ofibh
.ebh
)
1259 if (nfibh
.sbh
!= nfibh
.ebh
)
1268 const struct inode_operations udf_dir_inode_operations
= {
1269 .lookup
= udf_lookup
,
1270 .create
= udf_create
,
1272 .unlink
= udf_unlink
,
1273 .symlink
= udf_symlink
,
1277 .rename
= udf_rename
,