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
)
258 * Look-up the inode for a given name.
261 * Required - lookup_dentry() will return -ENOTDIR if this routine is not
262 * available for a directory. The filesystem is useless if this routine is
263 * not available for at least the filesystem's root directory.
265 * This routine is passed an incomplete dentry - it must be completed by
266 * calling d_add(dentry, inode). If the name does not exist, then the
267 * specified inode must be set to null. An error should only be returned
268 * when the lookup fails for a reason other than the name not existing.
269 * Note that the directory inode semaphore is held during the call.
271 * Refer to lookup_dentry() in fs/namei.c
272 * lookup_dentry() -> lookup() -> real_lookup() -> .
275 * dir Pointer to inode of parent directory.
276 * dentry Pointer to dentry to complete.
277 * nd Pointer to lookup nameidata
280 * <return> Zero on success.
283 * July 1, 1997 - Andrew E. Mileski
284 * Written, tested, and released.
287 static struct dentry
*udf_lookup(struct inode
*dir
, struct dentry
*dentry
,
288 struct nameidata
*nd
)
290 struct inode
*inode
= NULL
;
291 struct fileIdentDesc cfi
;
292 struct udf_fileident_bh fibh
;
294 if (dentry
->d_name
.len
> UDF_NAME_LEN
- 2)
295 return ERR_PTR(-ENAMETOOLONG
);
299 /* temporary shorthand for specifying files by inode number */
300 if (!strncmp(dentry
->d_name
.name
, ".B=", 3)) {
301 kernel_lb_addr lb
= {
302 .logicalBlockNum
= 0,
303 .partitionReferenceNum
=
304 simple_strtoul(dentry
->d_name
.name
+ 3,
307 inode
= udf_iget(dir
->i_sb
, lb
);
310 return ERR_PTR(-EACCES
);
313 #endif /* UDF_RECOVERY */
315 if (udf_find_entry(dir
, dentry
, &fibh
, &cfi
)) {
316 if (fibh
.sbh
!= fibh
.ebh
)
320 inode
= udf_iget(dir
->i_sb
, lelb_to_cpu(cfi
.icb
.extLocation
));
323 return ERR_PTR(-EACCES
);
327 d_add(dentry
, inode
);
332 static struct fileIdentDesc
*udf_add_entry(struct inode
*dir
,
333 struct dentry
*dentry
,
334 struct udf_fileident_bh
*fibh
,
335 struct fileIdentDesc
*cfi
, int *err
)
337 struct super_block
*sb
= dir
->i_sb
;
338 struct fileIdentDesc
*fi
= NULL
;
339 char name
[UDF_NAME_LEN
], fname
[UDF_NAME_LEN
];
344 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
352 struct extent_position epos
= {};
353 struct udf_inode_info
*dinfo
;
356 if (!dentry
->d_name
.len
) {
360 namelen
= udf_put_filename(sb
, dentry
->d_name
.name
, name
,
363 *err
= -ENAMETOOLONG
;
370 nfidlen
= (sizeof(struct fileIdentDesc
) + namelen
+ 3) & ~3;
372 f_pos
= udf_ext0_offset(dir
);
374 fibh
->soffset
= fibh
->eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
376 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
377 fibh
->sbh
= fibh
->ebh
= NULL
;
378 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
379 &epos
, &eloc
, &elen
, &offset
) ==
380 (EXT_RECORDED_ALLOCATED
>> 30)) {
381 block
= udf_get_lb_pblock(dir
->i_sb
, eloc
, offset
);
382 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
383 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
384 epos
.offset
-= sizeof(short_ad
);
385 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
386 epos
.offset
-= sizeof(long_ad
);
390 fibh
->sbh
= fibh
->ebh
= udf_tread(dir
->i_sb
, block
);
397 block
= dinfo
->i_location
.logicalBlockNum
;
400 block
= udf_get_lb_pblock(dir
->i_sb
, dinfo
->i_location
, 0);
401 fibh
->sbh
= fibh
->ebh
= NULL
;
402 fibh
->soffset
= fibh
->eoffset
= sb
->s_blocksize
;
406 while (f_pos
< size
) {
407 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
411 if (fibh
->sbh
!= fibh
->ebh
)
419 liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
420 lfi
= cfi
->lengthFileIdent
;
422 if (fibh
->sbh
== fibh
->ebh
)
423 nameptr
= fi
->fileIdent
+ liu
;
425 int poffset
; /* Unpaded ending offset */
427 poffset
= fibh
->soffset
+ sizeof(struct fileIdentDesc
) +
431 nameptr
= (char *)(fibh
->ebh
->b_data
+
435 memcpy(nameptr
, fi
->fileIdent
+ liu
,
437 memcpy(nameptr
+ lfi
- poffset
,
438 fibh
->ebh
->b_data
, poffset
);
442 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
443 if (((sizeof(struct fileIdentDesc
) +
444 liu
+ lfi
+ 3) & ~3) == nfidlen
) {
446 cfi
->descTag
.tagSerialNum
= cpu_to_le16(1);
447 cfi
->fileVersionNum
= cpu_to_le16(1);
448 cfi
->fileCharacteristics
= 0;
449 cfi
->lengthFileIdent
= namelen
;
450 cfi
->lengthOfImpUse
= cpu_to_le16(0);
451 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
,
464 flen
= udf_get_filename(dir
->i_sb
, nameptr
, fname
, lfi
);
465 if (flen
&& udf_match(flen
, fname
, dentry
->d_name
.len
,
466 dentry
->d_name
.name
)) {
467 if (fibh
->sbh
!= fibh
->ebh
)
479 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
&&
480 sb
->s_blocksize
- fibh
->eoffset
< nfidlen
) {
483 fibh
->soffset
-= udf_ext0_offset(dir
);
484 fibh
->eoffset
-= udf_ext0_offset(dir
);
485 f_pos
-= udf_ext0_offset(dir
);
486 if (fibh
->sbh
!= fibh
->ebh
)
489 fibh
->sbh
= fibh
->ebh
=
490 udf_expand_dir_adinicb(dir
, &block
, err
);
493 epos
.block
= dinfo
->i_location
;
494 eloc
.logicalBlockNum
= block
;
495 eloc
.partitionReferenceNum
=
496 dinfo
->i_location
.partitionReferenceNum
;
497 elen
= dir
->i_sb
->s_blocksize
;
498 epos
.offset
= udf_file_entry_alloc_offset(dir
);
499 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
500 epos
.offset
+= sizeof(short_ad
);
501 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
502 epos
.offset
+= sizeof(long_ad
);
505 if (sb
->s_blocksize
- fibh
->eoffset
>= nfidlen
) {
506 fibh
->soffset
= fibh
->eoffset
;
507 fibh
->eoffset
+= nfidlen
;
508 if (fibh
->sbh
!= fibh
->ebh
) {
510 fibh
->sbh
= fibh
->ebh
;
513 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
514 block
= dinfo
->i_location
.logicalBlockNum
;
515 fi
= (struct fileIdentDesc
*)
516 (dinfo
->i_ext
.i_data
+
518 udf_ext0_offset(dir
) +
521 block
= eloc
.logicalBlockNum
+
523 dir
->i_sb
->s_blocksize_bits
);
524 fi
= (struct fileIdentDesc
*)
525 (fibh
->sbh
->b_data
+ fibh
->soffset
);
528 fibh
->soffset
= fibh
->eoffset
- sb
->s_blocksize
;
529 fibh
->eoffset
+= nfidlen
- sb
->s_blocksize
;
530 if (fibh
->sbh
!= fibh
->ebh
) {
532 fibh
->sbh
= fibh
->ebh
;
535 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
536 dir
->i_sb
->s_blocksize_bits
);
537 fibh
->ebh
= udf_bread(dir
,
538 f_pos
>> dir
->i_sb
->s_blocksize_bits
, 1, err
);
545 if (!fibh
->soffset
) {
546 if (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
547 (EXT_RECORDED_ALLOCATED
>> 30)) {
548 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
549 dir
->i_sb
->s_blocksize_bits
);
554 fibh
->sbh
= fibh
->ebh
;
555 fi
= (struct fileIdentDesc
*)(fibh
->sbh
->b_data
);
557 fi
= (struct fileIdentDesc
*)
558 (fibh
->sbh
->b_data
+ sb
->s_blocksize
+
563 memset(cfi
, 0, sizeof(struct fileIdentDesc
));
564 if (UDF_SB(sb
)->s_udfrev
>= 0x0200)
565 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 3, 1, block
,
568 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 2, 1, block
,
570 cfi
->fileVersionNum
= cpu_to_le16(1);
571 cfi
->lengthFileIdent
= namelen
;
572 cfi
->lengthOfImpUse
= cpu_to_le16(0);
573 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
, name
)) {
575 dir
->i_size
+= nfidlen
;
576 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
577 dinfo
->i_lenAlloc
+= nfidlen
;
578 mark_inode_dirty(dir
);
582 if (fibh
->sbh
!= fibh
->ebh
)
590 static int udf_delete_entry(struct inode
*inode
, struct fileIdentDesc
*fi
,
591 struct udf_fileident_bh
*fibh
,
592 struct fileIdentDesc
*cfi
)
594 cfi
->fileCharacteristics
|= FID_FILE_CHAR_DELETED
;
596 if (UDF_QUERY_FLAG(inode
->i_sb
, UDF_FLAG_STRICT
))
597 memset(&(cfi
->icb
), 0x00, sizeof(long_ad
));
599 return udf_write_fi(inode
, cfi
, fi
, fibh
, NULL
, NULL
);
602 static int udf_create(struct inode
*dir
, struct dentry
*dentry
, int mode
,
603 struct nameidata
*nd
)
605 struct udf_fileident_bh fibh
;
607 struct fileIdentDesc cfi
, *fi
;
609 struct udf_inode_info
*iinfo
;
612 inode
= udf_new_inode(dir
, mode
, &err
);
618 iinfo
= UDF_I(inode
);
619 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
620 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
622 inode
->i_data
.a_ops
= &udf_aops
;
623 inode
->i_op
= &udf_file_inode_operations
;
624 inode
->i_fop
= &udf_file_operations
;
625 inode
->i_mode
= mode
;
626 mark_inode_dirty(inode
);
628 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
631 mark_inode_dirty(inode
);
636 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
637 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
638 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
639 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
640 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
641 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
642 mark_inode_dirty(dir
);
643 if (fibh
.sbh
!= fibh
.ebh
)
647 d_instantiate(dentry
, inode
);
652 static int udf_mknod(struct inode
*dir
, struct dentry
*dentry
, int mode
,
656 struct udf_fileident_bh fibh
;
657 struct fileIdentDesc cfi
, *fi
;
659 struct udf_inode_info
*iinfo
;
661 if (!old_valid_dev(rdev
))
666 inode
= udf_new_inode(dir
, mode
, &err
);
670 iinfo
= UDF_I(inode
);
671 inode
->i_uid
= current
->fsuid
;
672 init_special_inode(inode
, mode
, rdev
);
673 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
676 mark_inode_dirty(inode
);
681 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
682 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
683 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
684 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
685 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
686 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
687 mark_inode_dirty(dir
);
688 mark_inode_dirty(inode
);
690 if (fibh
.sbh
!= fibh
.ebh
)
693 d_instantiate(dentry
, inode
);
701 static int udf_mkdir(struct inode
*dir
, struct dentry
*dentry
, int mode
)
704 struct udf_fileident_bh fibh
;
705 struct fileIdentDesc cfi
, *fi
;
707 struct udf_inode_info
*dinfo
= UDF_I(dir
);
708 struct udf_inode_info
*iinfo
;
712 if (dir
->i_nlink
>= (256 << sizeof(dir
->i_nlink
)) - 1)
716 inode
= udf_new_inode(dir
, S_IFDIR
, &err
);
720 iinfo
= UDF_I(inode
);
721 inode
->i_op
= &udf_dir_inode_operations
;
722 inode
->i_fop
= &udf_dir_operations
;
723 fi
= udf_add_entry(inode
, NULL
, &fibh
, &cfi
, &err
);
726 mark_inode_dirty(inode
);
731 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
732 cfi
.icb
.extLocation
= cpu_to_lelb(dinfo
->i_location
);
733 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
734 cpu_to_le32(dinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
735 cfi
.fileCharacteristics
=
736 FID_FILE_CHAR_DIRECTORY
| FID_FILE_CHAR_PARENT
;
737 udf_write_fi(inode
, &cfi
, fi
, &fibh
, NULL
, NULL
);
739 inode
->i_mode
= S_IFDIR
| mode
;
740 if (dir
->i_mode
& S_ISGID
)
741 inode
->i_mode
|= S_ISGID
;
742 mark_inode_dirty(inode
);
744 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
747 mark_inode_dirty(inode
);
751 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
752 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
753 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
754 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
755 cfi
.fileCharacteristics
|= FID_FILE_CHAR_DIRECTORY
;
756 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
758 mark_inode_dirty(dir
);
759 d_instantiate(dentry
, inode
);
760 if (fibh
.sbh
!= fibh
.ebh
)
770 static int empty_dir(struct inode
*dir
)
772 struct fileIdentDesc
*fi
, cfi
;
773 struct udf_fileident_bh fibh
;
775 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
780 struct extent_position epos
= {};
781 struct udf_inode_info
*dinfo
= UDF_I(dir
);
783 f_pos
= udf_ext0_offset(dir
);
784 fibh
.soffset
= fibh
.eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
786 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
787 fibh
.sbh
= fibh
.ebh
= NULL
;
788 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
789 &epos
, &eloc
, &elen
, &offset
) ==
790 (EXT_RECORDED_ALLOCATED
>> 30)) {
791 block
= udf_get_lb_pblock(dir
->i_sb
, eloc
, offset
);
792 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
793 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
794 epos
.offset
-= sizeof(short_ad
);
795 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
796 epos
.offset
-= sizeof(long_ad
);
800 fibh
.sbh
= fibh
.ebh
= udf_tread(dir
->i_sb
, block
);
810 while (f_pos
< size
) {
811 fi
= udf_fileident_read(dir
, &f_pos
, &fibh
, &cfi
, &epos
, &eloc
,
814 if (fibh
.sbh
!= fibh
.ebh
)
821 if (cfi
.lengthFileIdent
&&
822 (cfi
.fileCharacteristics
& FID_FILE_CHAR_DELETED
) == 0) {
823 if (fibh
.sbh
!= fibh
.ebh
)
831 if (fibh
.sbh
!= fibh
.ebh
)
839 static int udf_rmdir(struct inode
*dir
, struct dentry
*dentry
)
842 struct inode
*inode
= dentry
->d_inode
;
843 struct udf_fileident_bh fibh
;
844 struct fileIdentDesc
*fi
, cfi
;
849 fi
= udf_find_entry(dir
, dentry
, &fibh
, &cfi
);
854 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
855 if (udf_get_lb_pblock(dir
->i_sb
, tloc
, 0) != inode
->i_ino
)
858 if (!empty_dir(inode
))
860 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
863 if (inode
->i_nlink
!= 2)
864 udf_warning(inode
->i_sb
, "udf_rmdir",
865 "empty directory has nlink != 2 (%d)",
869 inode_dec_link_count(dir
);
870 inode
->i_ctime
= dir
->i_ctime
= dir
->i_mtime
=
871 current_fs_time(dir
->i_sb
);
872 mark_inode_dirty(dir
);
875 if (fibh
.sbh
!= fibh
.ebh
)
884 static int udf_unlink(struct inode
*dir
, struct dentry
*dentry
)
887 struct inode
*inode
= dentry
->d_inode
;
888 struct udf_fileident_bh fibh
;
889 struct fileIdentDesc
*fi
;
890 struct fileIdentDesc cfi
;
895 fi
= udf_find_entry(dir
, dentry
, &fibh
, &cfi
);
900 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
901 if (udf_get_lb_pblock(dir
->i_sb
, tloc
, 0) != inode
->i_ino
)
904 if (!inode
->i_nlink
) {
905 udf_debug("Deleting nonexistent file (%lu), %d\n",
906 inode
->i_ino
, inode
->i_nlink
);
909 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
912 dir
->i_ctime
= dir
->i_mtime
= current_fs_time(dir
->i_sb
);
913 mark_inode_dirty(dir
);
914 inode_dec_link_count(inode
);
915 inode
->i_ctime
= dir
->i_ctime
;
919 if (fibh
.sbh
!= fibh
.ebh
)
928 static int udf_symlink(struct inode
*dir
, struct dentry
*dentry
,
932 struct pathComponent
*pc
;
934 struct udf_fileident_bh fibh
;
935 struct extent_position epos
= {};
936 int eoffset
, elen
= 0;
937 struct fileIdentDesc
*fi
;
938 struct fileIdentDesc cfi
;
942 char name
[UDF_NAME_LEN
];
944 struct buffer_head
*bh
;
945 struct udf_inode_info
*iinfo
;
948 inode
= udf_new_inode(dir
, S_IFLNK
, &err
);
952 iinfo
= UDF_I(inode
);
953 inode
->i_mode
= S_IFLNK
| S_IRWXUGO
;
954 inode
->i_data
.a_ops
= &udf_symlink_aops
;
955 inode
->i_op
= &page_symlink_inode_operations
;
957 if (iinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
961 block
= udf_new_block(inode
->i_sb
, inode
,
962 iinfo
->i_location
.partitionReferenceNum
,
963 iinfo
->i_location
.logicalBlockNum
, &err
);
966 epos
.block
= iinfo
->i_location
;
967 epos
.offset
= udf_file_entry_alloc_offset(inode
);
969 eloc
.logicalBlockNum
= block
;
970 eloc
.partitionReferenceNum
=
971 iinfo
->i_location
.partitionReferenceNum
;
972 elen
= inode
->i_sb
->s_blocksize
;
973 iinfo
->i_lenExtents
= elen
;
974 udf_add_aext(inode
, &epos
, eloc
, elen
, 0);
977 block
= udf_get_pblock(inode
->i_sb
, block
,
978 iinfo
->i_location
.partitionReferenceNum
,
980 epos
.bh
= udf_tread(inode
->i_sb
, block
);
981 lock_buffer(epos
.bh
);
982 memset(epos
.bh
->b_data
, 0x00, inode
->i_sb
->s_blocksize
);
983 set_buffer_uptodate(epos
.bh
);
984 unlock_buffer(epos
.bh
);
985 mark_buffer_dirty_inode(epos
.bh
, inode
);
986 ea
= epos
.bh
->b_data
+ udf_ext0_offset(inode
);
988 ea
= iinfo
->i_ext
.i_data
+ iinfo
->i_lenEAttr
;
990 eoffset
= inode
->i_sb
->s_blocksize
- udf_ext0_offset(inode
);
991 pc
= (struct pathComponent
*)ea
;
993 if (*symname
== '/') {
996 } while (*symname
== '/');
998 pc
->componentType
= 1;
999 pc
->lengthComponentIdent
= 0;
1000 pc
->componentFileVersionNum
= 0;
1001 pc
+= sizeof(struct pathComponent
);
1002 elen
+= sizeof(struct pathComponent
);
1005 err
= -ENAMETOOLONG
;
1008 if (elen
+ sizeof(struct pathComponent
) > eoffset
)
1011 pc
= (struct pathComponent
*)(ea
+ elen
);
1013 compstart
= (char *)symname
;
1017 } while (*symname
&& *symname
!= '/');
1019 pc
->componentType
= 5;
1020 pc
->lengthComponentIdent
= 0;
1021 pc
->componentFileVersionNum
= 0;
1022 if (compstart
[0] == '.') {
1023 if ((symname
- compstart
) == 1)
1024 pc
->componentType
= 4;
1025 else if ((symname
- compstart
) == 2 &&
1026 compstart
[1] == '.')
1027 pc
->componentType
= 3;
1030 if (pc
->componentType
== 5) {
1031 namelen
= udf_put_filename(inode
->i_sb
, compstart
, name
,
1032 symname
- compstart
);
1036 if (elen
+ sizeof(struct pathComponent
) + namelen
>
1040 pc
->lengthComponentIdent
= namelen
;
1042 memcpy(pc
->componentIdent
, name
, namelen
);
1045 elen
+= sizeof(struct pathComponent
) + pc
->lengthComponentIdent
;
1050 } while (*symname
== '/');
1055 inode
->i_size
= elen
;
1056 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1057 iinfo
->i_lenAlloc
= inode
->i_size
;
1058 mark_inode_dirty(inode
);
1060 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
1063 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
1064 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
1065 bh
= UDF_SB(inode
->i_sb
)->s_lvid_bh
;
1067 struct logicalVolIntegrityDesc
*lvid
=
1068 (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1069 struct logicalVolHeaderDesc
*lvhd
;
1071 lvhd
= (struct logicalVolHeaderDesc
*)
1072 lvid
->logicalVolContentsUse
;
1073 uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
1074 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
1075 cpu_to_le32(uniqueID
& 0x00000000FFFFFFFFUL
);
1076 if (!(++uniqueID
& 0x00000000FFFFFFFFUL
))
1078 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
1079 mark_buffer_dirty(bh
);
1081 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
1082 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1083 mark_inode_dirty(dir
);
1084 if (fibh
.sbh
!= fibh
.ebh
)
1087 d_instantiate(dentry
, inode
);
1095 inode_dec_link_count(inode
);
1100 static int udf_link(struct dentry
*old_dentry
, struct inode
*dir
,
1101 struct dentry
*dentry
)
1103 struct inode
*inode
= old_dentry
->d_inode
;
1104 struct udf_fileident_bh fibh
;
1105 struct fileIdentDesc cfi
, *fi
;
1107 struct buffer_head
*bh
;
1110 if (inode
->i_nlink
>= (256 << sizeof(inode
->i_nlink
)) - 1) {
1115 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
1120 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
1121 cfi
.icb
.extLocation
= cpu_to_lelb(UDF_I(inode
)->i_location
);
1122 bh
= UDF_SB(inode
->i_sb
)->s_lvid_bh
;
1124 struct logicalVolIntegrityDesc
*lvid
=
1125 (struct logicalVolIntegrityDesc
*)bh
->b_data
;
1126 struct logicalVolHeaderDesc
*lvhd
;
1128 lvhd
= (struct logicalVolHeaderDesc
*)
1129 (lvid
->logicalVolContentsUse
);
1130 uniqueID
= le64_to_cpu(lvhd
->uniqueID
);
1131 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
1132 cpu_to_le32(uniqueID
& 0x00000000FFFFFFFFUL
);
1133 if (!(++uniqueID
& 0x00000000FFFFFFFFUL
))
1135 lvhd
->uniqueID
= cpu_to_le64(uniqueID
);
1136 mark_buffer_dirty(bh
);
1138 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
1139 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1140 mark_inode_dirty(dir
);
1142 if (fibh
.sbh
!= fibh
.ebh
)
1146 inode
->i_ctime
= current_fs_time(inode
->i_sb
);
1147 mark_inode_dirty(inode
);
1148 atomic_inc(&inode
->i_count
);
1149 d_instantiate(dentry
, inode
);
1155 /* Anybody can rename anything with this: the permission checks are left to the
1156 * higher-level routines.
1158 static int udf_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1159 struct inode
*new_dir
, struct dentry
*new_dentry
)
1161 struct inode
*old_inode
= old_dentry
->d_inode
;
1162 struct inode
*new_inode
= new_dentry
->d_inode
;
1163 struct udf_fileident_bh ofibh
, nfibh
;
1164 struct fileIdentDesc
*ofi
= NULL
, *nfi
= NULL
, *dir_fi
= NULL
;
1165 struct fileIdentDesc ocfi
, ncfi
;
1166 struct buffer_head
*dir_bh
= NULL
;
1167 int retval
= -ENOENT
;
1168 kernel_lb_addr tloc
;
1169 struct udf_inode_info
*old_iinfo
= UDF_I(old_inode
);
1172 ofi
= udf_find_entry(old_dir
, old_dentry
, &ofibh
, &ocfi
);
1174 if (ofibh
.sbh
!= ofibh
.ebh
)
1178 tloc
= lelb_to_cpu(ocfi
.icb
.extLocation
);
1179 if (!ofi
|| udf_get_lb_pblock(old_dir
->i_sb
, tloc
, 0)
1180 != old_inode
->i_ino
)
1183 nfi
= udf_find_entry(new_dir
, new_dentry
, &nfibh
, &ncfi
);
1186 if (nfibh
.sbh
!= nfibh
.ebh
)
1192 if (S_ISDIR(old_inode
->i_mode
)) {
1193 int offset
= udf_ext0_offset(old_inode
);
1196 retval
= -ENOTEMPTY
;
1197 if (!empty_dir(new_inode
))
1201 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
1202 dir_fi
= udf_get_fileident(
1203 old_iinfo
->i_ext
.i_data
-
1205 sizeof(struct extendedFileEntry
) :
1206 sizeof(struct fileEntry
)),
1207 old_inode
->i_sb
->s_blocksize
, &offset
);
1209 dir_bh
= udf_bread(old_inode
, 0, 0, &retval
);
1212 dir_fi
= udf_get_fileident(dir_bh
->b_data
,
1213 old_inode
->i_sb
->s_blocksize
, &offset
);
1217 tloc
= lelb_to_cpu(dir_fi
->icb
.extLocation
);
1218 if (udf_get_lb_pblock(old_inode
->i_sb
, tloc
, 0) !=
1225 (256 << sizeof(new_dir
->i_nlink
)) - 1)
1229 nfi
= udf_add_entry(new_dir
, new_dentry
, &nfibh
, &ncfi
,
1236 * Like most other Unix systems, set the ctime for inodes on a
1239 old_inode
->i_ctime
= current_fs_time(old_inode
->i_sb
);
1240 mark_inode_dirty(old_inode
);
1245 ncfi
.fileVersionNum
= ocfi
.fileVersionNum
;
1246 ncfi
.fileCharacteristics
= ocfi
.fileCharacteristics
;
1247 memcpy(&(ncfi
.icb
), &(ocfi
.icb
), sizeof(long_ad
));
1248 udf_write_fi(new_dir
, &ncfi
, nfi
, &nfibh
, NULL
, NULL
);
1250 /* The old fid may have moved - find it again */
1251 ofi
= udf_find_entry(old_dir
, old_dentry
, &ofibh
, &ocfi
);
1252 udf_delete_entry(old_dir
, ofi
, &ofibh
, &ocfi
);
1255 new_inode
->i_ctime
= current_fs_time(new_inode
->i_sb
);
1256 inode_dec_link_count(new_inode
);
1258 old_dir
->i_ctime
= old_dir
->i_mtime
= current_fs_time(old_dir
->i_sb
);
1259 mark_inode_dirty(old_dir
);
1262 dir_fi
->icb
.extLocation
= cpu_to_lelb(UDF_I(new_dir
)->i_location
);
1263 udf_update_tag((char *)dir_fi
,
1264 (sizeof(struct fileIdentDesc
) +
1265 le16_to_cpu(dir_fi
->lengthOfImpUse
) + 3) & ~3);
1266 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1267 mark_inode_dirty(old_inode
);
1269 mark_buffer_dirty_inode(dir_bh
, old_inode
);
1271 inode_dec_link_count(old_dir
);
1273 inode_dec_link_count(new_inode
);
1276 mark_inode_dirty(new_dir
);
1281 if (ofibh
.sbh
!= ofibh
.ebh
)
1291 if (nfibh
.sbh
!= nfibh
.ebh
)
1300 const struct inode_operations udf_dir_inode_operations
= {
1301 .lookup
= udf_lookup
,
1302 .create
= udf_create
,
1304 .unlink
= udf_unlink
,
1305 .symlink
= udf_symlink
,
1309 .rename
= udf_rename
,