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/buffer_head.h>
31 #include <linux/sched.h>
32 #include <linux/crc-itu-t.h>
33 #include <linux/exportfs.h>
35 static inline int udf_match(int len1
, const unsigned char *name1
, int len2
,
36 const unsigned char *name2
)
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(struct 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
= crc_itu_t(0, (uint8_t *)cfi
+ sizeof(struct tag
),
101 sizeof(struct fileIdentDesc
) - sizeof(struct tag
));
103 if (fibh
->sbh
== fibh
->ebh
) {
104 crc
= crc_itu_t(crc
, (uint8_t *)sfi
->impUse
,
105 crclen
+ sizeof(struct tag
) -
106 sizeof(struct fileIdentDesc
));
107 } else if (sizeof(struct fileIdentDesc
) >= -fibh
->soffset
) {
108 crc
= crc_itu_t(crc
, fibh
->ebh
->b_data
+
109 sizeof(struct fileIdentDesc
) +
111 crclen
+ sizeof(struct tag
) -
112 sizeof(struct fileIdentDesc
));
114 crc
= crc_itu_t(crc
, (uint8_t *)sfi
->impUse
,
115 -fibh
->soffset
- sizeof(struct fileIdentDesc
));
116 crc
= crc_itu_t(crc
, fibh
->ebh
->b_data
, fibh
->eoffset
);
119 cfi
->descTag
.descCRC
= cpu_to_le16(crc
);
120 cfi
->descTag
.descCRCLength
= cpu_to_le16(crclen
);
121 cfi
->descTag
.tagChecksum
= udf_tag_checksum(&cfi
->descTag
);
123 if (adinicb
|| (sizeof(struct fileIdentDesc
) <= -fibh
->soffset
)) {
124 memcpy((uint8_t *)sfi
, (uint8_t *)cfi
,
125 sizeof(struct fileIdentDesc
));
127 memcpy((uint8_t *)sfi
, (uint8_t *)cfi
, -fibh
->soffset
);
128 memcpy(fibh
->ebh
->b_data
, (uint8_t *)cfi
- fibh
->soffset
,
129 sizeof(struct fileIdentDesc
) + fibh
->soffset
);
133 mark_inode_dirty(inode
);
135 if (fibh
->sbh
!= fibh
->ebh
)
136 mark_buffer_dirty_inode(fibh
->ebh
, inode
);
137 mark_buffer_dirty_inode(fibh
->sbh
, inode
);
142 static struct fileIdentDesc
*udf_find_entry(struct inode
*dir
,
143 const struct qstr
*child
,
144 struct udf_fileident_bh
*fibh
,
145 struct fileIdentDesc
*cfi
)
147 struct fileIdentDesc
*fi
= NULL
;
150 unsigned char *fname
= NULL
;
151 unsigned char *nameptr
;
155 struct kernel_lb_addr eloc
;
158 struct extent_position epos
= {};
159 struct udf_inode_info
*dinfo
= UDF_I(dir
);
160 int isdotdot
= child
->len
== 2 &&
161 child
->name
[0] == '.' && child
->name
[1] == '.';
162 struct super_block
*sb
= dir
->i_sb
;
164 size
= udf_ext0_offset(dir
) + dir
->i_size
;
165 f_pos
= udf_ext0_offset(dir
);
167 fibh
->sbh
= fibh
->ebh
= NULL
;
168 fibh
->soffset
= fibh
->eoffset
= f_pos
& (sb
->s_blocksize
- 1);
169 if (dinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
170 if (inode_bmap(dir
, f_pos
>> sb
->s_blocksize_bits
, &epos
,
171 &eloc
, &elen
, &offset
) != (EXT_RECORDED_ALLOCATED
>> 30))
173 block
= udf_get_lb_pblock(sb
, &eloc
, offset
);
174 if ((++offset
<< sb
->s_blocksize_bits
) < elen
) {
175 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
176 epos
.offset
-= sizeof(struct short_ad
);
177 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
178 epos
.offset
-= sizeof(struct long_ad
);
182 fibh
->sbh
= fibh
->ebh
= udf_tread(sb
, block
);
187 fname
= kmalloc(UDF_NAME_LEN
, GFP_NOFS
);
191 while (f_pos
< size
) {
192 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
197 liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
198 lfi
= cfi
->lengthFileIdent
;
200 if (fibh
->sbh
== fibh
->ebh
) {
201 nameptr
= fi
->fileIdent
+ liu
;
203 int poffset
; /* Unpaded ending offset */
205 poffset
= fibh
->soffset
+ sizeof(struct fileIdentDesc
) +
209 nameptr
= (uint8_t *)(fibh
->ebh
->b_data
+
213 memcpy(nameptr
, fi
->fileIdent
+ liu
,
215 memcpy(nameptr
+ lfi
- poffset
,
216 fibh
->ebh
->b_data
, poffset
);
220 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
221 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_UNDELETE
))
225 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_HIDDEN
) != 0) {
226 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_UNHIDE
))
230 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_PARENT
) &&
237 flen
= udf_get_filename(sb
, nameptr
, lfi
, fname
, UDF_NAME_LEN
);
238 if (flen
&& udf_match(flen
, fname
, child
->len
, child
->name
))
244 if (fibh
->sbh
!= fibh
->ebh
)
254 static struct dentry
*udf_lookup(struct inode
*dir
, struct dentry
*dentry
,
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
);
265 /* temporary shorthand for specifying files by inode number */
266 if (!strncmp(dentry
->d_name
.name
, ".B=", 3)) {
267 struct kernel_lb_addr lb
= {
268 .logicalBlockNum
= 0,
269 .partitionReferenceNum
=
270 simple_strtoul(dentry
->d_name
.name
+ 3,
273 inode
= udf_iget(dir
->i_sb
, lb
);
277 #endif /* UDF_RECOVERY */
279 if (udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
)) {
280 struct kernel_lb_addr loc
;
282 if (fibh
.sbh
!= fibh
.ebh
)
286 loc
= lelb_to_cpu(cfi
.icb
.extLocation
);
287 inode
= udf_iget(dir
->i_sb
, &loc
);
289 return ERR_CAST(inode
);
292 return d_splice_alias(inode
, dentry
);
295 static struct fileIdentDesc
*udf_add_entry(struct inode
*dir
,
296 struct dentry
*dentry
,
297 struct udf_fileident_bh
*fibh
,
298 struct fileIdentDesc
*cfi
, int *err
)
300 struct super_block
*sb
= dir
->i_sb
;
301 struct fileIdentDesc
*fi
= NULL
;
302 unsigned char *name
= NULL
;
305 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
310 struct kernel_lb_addr eloc
;
313 struct extent_position epos
= {};
314 struct udf_inode_info
*dinfo
;
316 fibh
->sbh
= fibh
->ebh
= NULL
;
317 name
= kmalloc(UDF_NAME_LEN
, GFP_NOFS
);
324 if (!dentry
->d_name
.len
) {
328 namelen
= udf_put_filename(sb
, dentry
->d_name
.name
, name
,
331 *err
= -ENAMETOOLONG
;
338 nfidlen
= (sizeof(struct fileIdentDesc
) + namelen
+ 3) & ~3;
340 f_pos
= udf_ext0_offset(dir
);
342 fibh
->soffset
= fibh
->eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
344 if (dinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
345 if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
, &epos
,
346 &eloc
, &elen
, &offset
) != (EXT_RECORDED_ALLOCATED
>> 30)) {
347 block
= udf_get_lb_pblock(dir
->i_sb
,
348 &dinfo
->i_location
, 0);
349 fibh
->soffset
= fibh
->eoffset
= sb
->s_blocksize
;
352 block
= udf_get_lb_pblock(dir
->i_sb
, &eloc
, offset
);
353 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
354 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
355 epos
.offset
-= sizeof(struct short_ad
);
356 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
357 epos
.offset
-= sizeof(struct long_ad
);
361 fibh
->sbh
= fibh
->ebh
= udf_tread(dir
->i_sb
, block
);
367 block
= dinfo
->i_location
.logicalBlockNum
;
370 while (f_pos
< size
) {
371 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
379 liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
380 lfi
= cfi
->lengthFileIdent
;
382 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
383 if (((sizeof(struct fileIdentDesc
) +
384 liu
+ lfi
+ 3) & ~3) == nfidlen
) {
385 cfi
->descTag
.tagSerialNum
= cpu_to_le16(1);
386 cfi
->fileVersionNum
= cpu_to_le16(1);
387 cfi
->fileCharacteristics
= 0;
388 cfi
->lengthFileIdent
= namelen
;
389 cfi
->lengthOfImpUse
= cpu_to_le16(0);
390 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
,
404 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
&&
405 sb
->s_blocksize
- fibh
->eoffset
< nfidlen
) {
408 fibh
->soffset
-= udf_ext0_offset(dir
);
409 fibh
->eoffset
-= udf_ext0_offset(dir
);
410 f_pos
-= udf_ext0_offset(dir
);
411 if (fibh
->sbh
!= fibh
->ebh
)
414 fibh
->sbh
= fibh
->ebh
=
415 udf_expand_dir_adinicb(dir
, &block
, err
);
418 epos
.block
= dinfo
->i_location
;
419 epos
.offset
= udf_file_entry_alloc_offset(dir
);
420 /* Load extent udf_expand_dir_adinicb() has created */
421 udf_current_aext(dir
, &epos
, &eloc
, &elen
, 1);
424 /* Entry fits into current block? */
425 if (sb
->s_blocksize
- fibh
->eoffset
>= nfidlen
) {
426 fibh
->soffset
= fibh
->eoffset
;
427 fibh
->eoffset
+= nfidlen
;
428 if (fibh
->sbh
!= fibh
->ebh
) {
430 fibh
->sbh
= fibh
->ebh
;
433 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
434 block
= dinfo
->i_location
.logicalBlockNum
;
435 fi
= (struct fileIdentDesc
*)
436 (dinfo
->i_ext
.i_data
+
438 udf_ext0_offset(dir
) +
441 block
= eloc
.logicalBlockNum
+
443 dir
->i_sb
->s_blocksize_bits
);
444 fi
= (struct fileIdentDesc
*)
445 (fibh
->sbh
->b_data
+ fibh
->soffset
);
448 /* Round up last extent in the file */
449 elen
= (elen
+ sb
->s_blocksize
- 1) & ~(sb
->s_blocksize
- 1);
450 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
451 epos
.offset
-= sizeof(struct short_ad
);
452 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
453 epos
.offset
-= sizeof(struct long_ad
);
454 udf_write_aext(dir
, &epos
, &eloc
, elen
, 1);
455 dinfo
->i_lenExtents
= (dinfo
->i_lenExtents
+ sb
->s_blocksize
456 - 1) & ~(sb
->s_blocksize
- 1);
458 fibh
->soffset
= fibh
->eoffset
- sb
->s_blocksize
;
459 fibh
->eoffset
+= nfidlen
- sb
->s_blocksize
;
460 if (fibh
->sbh
!= fibh
->ebh
) {
462 fibh
->sbh
= fibh
->ebh
;
465 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
466 dir
->i_sb
->s_blocksize_bits
);
467 fibh
->ebh
= udf_bread(dir
,
468 f_pos
>> dir
->i_sb
->s_blocksize_bits
, 1, err
);
471 /* Extents could have been merged, invalidate our position */
474 epos
.block
= dinfo
->i_location
;
475 epos
.offset
= udf_file_entry_alloc_offset(dir
);
477 if (!fibh
->soffset
) {
478 /* Find the freshly allocated block */
479 while (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
480 (EXT_RECORDED_ALLOCATED
>> 30))
482 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
483 dir
->i_sb
->s_blocksize_bits
);
485 fibh
->sbh
= fibh
->ebh
;
486 fi
= (struct fileIdentDesc
*)(fibh
->sbh
->b_data
);
488 fi
= (struct fileIdentDesc
*)
489 (fibh
->sbh
->b_data
+ sb
->s_blocksize
+
494 memset(cfi
, 0, sizeof(struct fileIdentDesc
));
495 if (UDF_SB(sb
)->s_udfrev
>= 0x0200)
496 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 3, 1, block
,
499 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 2, 1, block
,
501 cfi
->fileVersionNum
= cpu_to_le16(1);
502 cfi
->lengthFileIdent
= namelen
;
503 cfi
->lengthOfImpUse
= cpu_to_le16(0);
504 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
, name
)) {
505 dir
->i_size
+= nfidlen
;
506 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
507 dinfo
->i_lenAlloc
+= nfidlen
;
509 /* Find the last extent and truncate it to proper size */
510 while (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
511 (EXT_RECORDED_ALLOCATED
>> 30))
513 elen
-= dinfo
->i_lenExtents
- dir
->i_size
;
514 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
515 epos
.offset
-= sizeof(struct short_ad
);
516 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
517 epos
.offset
-= sizeof(struct long_ad
);
518 udf_write_aext(dir
, &epos
, &eloc
, elen
, 1);
519 dinfo
->i_lenExtents
= dir
->i_size
;
522 mark_inode_dirty(dir
);
531 if (fibh
->sbh
!= fibh
->ebh
)
540 static int udf_delete_entry(struct inode
*inode
, struct fileIdentDesc
*fi
,
541 struct udf_fileident_bh
*fibh
,
542 struct fileIdentDesc
*cfi
)
544 cfi
->fileCharacteristics
|= FID_FILE_CHAR_DELETED
;
546 if (UDF_QUERY_FLAG(inode
->i_sb
, UDF_FLAG_STRICT
))
547 memset(&(cfi
->icb
), 0x00, sizeof(struct long_ad
));
549 return udf_write_fi(inode
, cfi
, fi
, fibh
, NULL
, NULL
);
552 static int udf_add_nondir(struct dentry
*dentry
, struct inode
*inode
)
554 struct udf_inode_info
*iinfo
= UDF_I(inode
);
555 struct inode
*dir
= dentry
->d_parent
->d_inode
;
556 struct udf_fileident_bh fibh
;
557 struct fileIdentDesc cfi
, *fi
;
560 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
562 inode_dec_link_count(inode
);
563 unlock_new_inode(inode
);
567 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
568 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
569 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
570 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
571 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
572 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
573 mark_inode_dirty(dir
);
574 if (fibh
.sbh
!= fibh
.ebh
)
577 unlock_new_inode(inode
);
578 d_instantiate(dentry
, inode
);
583 static int udf_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
586 struct inode
*inode
= udf_new_inode(dir
, mode
);
589 return PTR_ERR(inode
);
591 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
592 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
594 inode
->i_data
.a_ops
= &udf_aops
;
595 inode
->i_op
= &udf_file_inode_operations
;
596 inode
->i_fop
= &udf_file_operations
;
597 mark_inode_dirty(inode
);
599 return udf_add_nondir(dentry
, inode
);
602 static int udf_tmpfile(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
604 struct inode
*inode
= udf_new_inode(dir
, mode
);
607 return PTR_ERR(inode
);
609 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
610 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
612 inode
->i_data
.a_ops
= &udf_aops
;
613 inode
->i_op
= &udf_file_inode_operations
;
614 inode
->i_fop
= &udf_file_operations
;
615 mark_inode_dirty(inode
);
616 d_tmpfile(dentry
, inode
);
617 unlock_new_inode(inode
);
621 static int udf_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
626 if (!old_valid_dev(rdev
))
629 inode
= udf_new_inode(dir
, mode
);
631 return PTR_ERR(inode
);
633 init_special_inode(inode
, mode
, rdev
);
634 return udf_add_nondir(dentry
, inode
);
637 static int udf_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
640 struct udf_fileident_bh fibh
;
641 struct fileIdentDesc cfi
, *fi
;
643 struct udf_inode_info
*dinfo
= UDF_I(dir
);
644 struct udf_inode_info
*iinfo
;
646 inode
= udf_new_inode(dir
, S_IFDIR
| mode
);
648 return PTR_ERR(inode
);
650 iinfo
= UDF_I(inode
);
651 inode
->i_op
= &udf_dir_inode_operations
;
652 inode
->i_fop
= &udf_dir_operations
;
653 fi
= udf_add_entry(inode
, NULL
, &fibh
, &cfi
, &err
);
655 inode_dec_link_count(inode
);
656 unlock_new_inode(inode
);
661 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
662 cfi
.icb
.extLocation
= cpu_to_lelb(dinfo
->i_location
);
663 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
664 cpu_to_le32(dinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
665 cfi
.fileCharacteristics
=
666 FID_FILE_CHAR_DIRECTORY
| FID_FILE_CHAR_PARENT
;
667 udf_write_fi(inode
, &cfi
, fi
, &fibh
, NULL
, NULL
);
669 mark_inode_dirty(inode
);
671 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
674 mark_inode_dirty(inode
);
675 unlock_new_inode(inode
);
679 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
680 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
681 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
682 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
683 cfi
.fileCharacteristics
|= FID_FILE_CHAR_DIRECTORY
;
684 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
686 mark_inode_dirty(dir
);
687 unlock_new_inode(inode
);
688 d_instantiate(dentry
, inode
);
689 if (fibh
.sbh
!= fibh
.ebh
)
698 static int empty_dir(struct inode
*dir
)
700 struct fileIdentDesc
*fi
, cfi
;
701 struct udf_fileident_bh fibh
;
703 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
705 struct kernel_lb_addr eloc
;
708 struct extent_position epos
= {};
709 struct udf_inode_info
*dinfo
= UDF_I(dir
);
711 f_pos
= udf_ext0_offset(dir
);
712 fibh
.soffset
= fibh
.eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
714 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
715 fibh
.sbh
= fibh
.ebh
= NULL
;
716 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
717 &epos
, &eloc
, &elen
, &offset
) ==
718 (EXT_RECORDED_ALLOCATED
>> 30)) {
719 block
= udf_get_lb_pblock(dir
->i_sb
, &eloc
, offset
);
720 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
721 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
722 epos
.offset
-= sizeof(struct short_ad
);
723 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
724 epos
.offset
-= sizeof(struct long_ad
);
728 fibh
.sbh
= fibh
.ebh
= udf_tread(dir
->i_sb
, block
);
738 while (f_pos
< size
) {
739 fi
= udf_fileident_read(dir
, &f_pos
, &fibh
, &cfi
, &epos
, &eloc
,
742 if (fibh
.sbh
!= fibh
.ebh
)
749 if (cfi
.lengthFileIdent
&&
750 (cfi
.fileCharacteristics
& FID_FILE_CHAR_DELETED
) == 0) {
751 if (fibh
.sbh
!= fibh
.ebh
)
759 if (fibh
.sbh
!= fibh
.ebh
)
767 static int udf_rmdir(struct inode
*dir
, struct dentry
*dentry
)
770 struct inode
*inode
= dentry
->d_inode
;
771 struct udf_fileident_bh fibh
;
772 struct fileIdentDesc
*fi
, cfi
;
773 struct kernel_lb_addr tloc
;
776 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
781 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
782 if (udf_get_lb_pblock(dir
->i_sb
, &tloc
, 0) != inode
->i_ino
)
785 if (!empty_dir(inode
))
787 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
790 if (inode
->i_nlink
!= 2)
791 udf_warn(inode
->i_sb
, "empty directory has nlink != 2 (%d)\n",
795 inode_dec_link_count(dir
);
796 inode
->i_ctime
= dir
->i_ctime
= dir
->i_mtime
=
797 current_fs_time(dir
->i_sb
);
798 mark_inode_dirty(dir
);
801 if (fibh
.sbh
!= fibh
.ebh
)
809 static int udf_unlink(struct inode
*dir
, struct dentry
*dentry
)
812 struct inode
*inode
= dentry
->d_inode
;
813 struct udf_fileident_bh fibh
;
814 struct fileIdentDesc
*fi
;
815 struct fileIdentDesc cfi
;
816 struct kernel_lb_addr tloc
;
819 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
824 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
825 if (udf_get_lb_pblock(dir
->i_sb
, &tloc
, 0) != inode
->i_ino
)
828 if (!inode
->i_nlink
) {
829 udf_debug("Deleting nonexistent file (%lu), %d\n",
830 inode
->i_ino
, inode
->i_nlink
);
833 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
836 dir
->i_ctime
= dir
->i_mtime
= current_fs_time(dir
->i_sb
);
837 mark_inode_dirty(dir
);
838 inode_dec_link_count(inode
);
839 inode
->i_ctime
= dir
->i_ctime
;
843 if (fibh
.sbh
!= fibh
.ebh
)
851 static int udf_symlink(struct inode
*dir
, struct dentry
*dentry
,
854 struct inode
*inode
= udf_new_inode(dir
, S_IFLNK
| S_IRWXUGO
);
855 struct pathComponent
*pc
;
856 const char *compstart
;
857 struct extent_position epos
= {};
858 int eoffset
, elen
= 0;
862 unsigned char *name
= NULL
;
864 struct udf_inode_info
*iinfo
;
865 struct super_block
*sb
= dir
->i_sb
;
868 return PTR_ERR(inode
);
870 iinfo
= UDF_I(inode
);
871 down_write(&iinfo
->i_data_sem
);
872 name
= kmalloc(UDF_NAME_LEN
, GFP_NOFS
);
878 inode
->i_data
.a_ops
= &udf_symlink_aops
;
879 inode
->i_op
= &udf_symlink_inode_operations
;
881 if (iinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
882 struct kernel_lb_addr eloc
;
885 block
= udf_new_block(sb
, inode
,
886 iinfo
->i_location
.partitionReferenceNum
,
887 iinfo
->i_location
.logicalBlockNum
, &err
);
890 epos
.block
= iinfo
->i_location
;
891 epos
.offset
= udf_file_entry_alloc_offset(inode
);
893 eloc
.logicalBlockNum
= block
;
894 eloc
.partitionReferenceNum
=
895 iinfo
->i_location
.partitionReferenceNum
;
896 bsize
= sb
->s_blocksize
;
897 iinfo
->i_lenExtents
= bsize
;
898 udf_add_aext(inode
, &epos
, &eloc
, bsize
, 0);
901 block
= udf_get_pblock(sb
, block
,
902 iinfo
->i_location
.partitionReferenceNum
,
904 epos
.bh
= udf_tgetblk(sb
, block
);
905 lock_buffer(epos
.bh
);
906 memset(epos
.bh
->b_data
, 0x00, bsize
);
907 set_buffer_uptodate(epos
.bh
);
908 unlock_buffer(epos
.bh
);
909 mark_buffer_dirty_inode(epos
.bh
, inode
);
910 ea
= epos
.bh
->b_data
+ udf_ext0_offset(inode
);
912 ea
= iinfo
->i_ext
.i_data
+ iinfo
->i_lenEAttr
;
914 eoffset
= sb
->s_blocksize
- udf_ext0_offset(inode
);
915 pc
= (struct pathComponent
*)ea
;
917 if (*symname
== '/') {
920 } while (*symname
== '/');
922 pc
->componentType
= 1;
923 pc
->lengthComponentIdent
= 0;
924 pc
->componentFileVersionNum
= 0;
925 elen
+= sizeof(struct pathComponent
);
931 if (elen
+ sizeof(struct pathComponent
) > eoffset
)
934 pc
= (struct pathComponent
*)(ea
+ elen
);
940 } while (*symname
&& *symname
!= '/');
942 pc
->componentType
= 5;
943 pc
->lengthComponentIdent
= 0;
944 pc
->componentFileVersionNum
= 0;
945 if (compstart
[0] == '.') {
946 if ((symname
- compstart
) == 1)
947 pc
->componentType
= 4;
948 else if ((symname
- compstart
) == 2 &&
950 pc
->componentType
= 3;
953 if (pc
->componentType
== 5) {
954 namelen
= udf_put_filename(sb
, compstart
, name
,
955 symname
- compstart
);
959 if (elen
+ sizeof(struct pathComponent
) + namelen
>
963 pc
->lengthComponentIdent
= namelen
;
965 memcpy(pc
->componentIdent
, name
, namelen
);
968 elen
+= sizeof(struct pathComponent
) + pc
->lengthComponentIdent
;
973 } while (*symname
== '/');
978 inode
->i_size
= elen
;
979 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
980 iinfo
->i_lenAlloc
= inode
->i_size
;
982 udf_truncate_tail_extent(inode
);
983 mark_inode_dirty(inode
);
984 up_write(&iinfo
->i_data_sem
);
986 err
= udf_add_nondir(dentry
, inode
);
992 up_write(&iinfo
->i_data_sem
);
993 inode_dec_link_count(inode
);
994 unlock_new_inode(inode
);
999 static int udf_link(struct dentry
*old_dentry
, struct inode
*dir
,
1000 struct dentry
*dentry
)
1002 struct inode
*inode
= old_dentry
->d_inode
;
1003 struct udf_fileident_bh fibh
;
1004 struct fileIdentDesc cfi
, *fi
;
1007 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
1011 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
1012 cfi
.icb
.extLocation
= cpu_to_lelb(UDF_I(inode
)->i_location
);
1013 if (UDF_SB(inode
->i_sb
)->s_lvid_bh
) {
1014 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
1015 cpu_to_le32(lvid_get_unique_id(inode
->i_sb
));
1017 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
1018 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1019 mark_inode_dirty(dir
);
1021 if (fibh
.sbh
!= fibh
.ebh
)
1025 inode
->i_ctime
= current_fs_time(inode
->i_sb
);
1026 mark_inode_dirty(inode
);
1028 d_instantiate(dentry
, inode
);
1033 /* Anybody can rename anything with this: the permission checks are left to the
1034 * higher-level routines.
1036 static int udf_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1037 struct inode
*new_dir
, struct dentry
*new_dentry
)
1039 struct inode
*old_inode
= old_dentry
->d_inode
;
1040 struct inode
*new_inode
= new_dentry
->d_inode
;
1041 struct udf_fileident_bh ofibh
, nfibh
;
1042 struct fileIdentDesc
*ofi
= NULL
, *nfi
= NULL
, *dir_fi
= NULL
;
1043 struct fileIdentDesc ocfi
, ncfi
;
1044 struct buffer_head
*dir_bh
= NULL
;
1045 int retval
= -ENOENT
;
1046 struct kernel_lb_addr tloc
;
1047 struct udf_inode_info
*old_iinfo
= UDF_I(old_inode
);
1049 ofi
= udf_find_entry(old_dir
, &old_dentry
->d_name
, &ofibh
, &ocfi
);
1051 if (ofibh
.sbh
!= ofibh
.ebh
)
1055 tloc
= lelb_to_cpu(ocfi
.icb
.extLocation
);
1056 if (!ofi
|| udf_get_lb_pblock(old_dir
->i_sb
, &tloc
, 0)
1057 != old_inode
->i_ino
)
1060 nfi
= udf_find_entry(new_dir
, &new_dentry
->d_name
, &nfibh
, &ncfi
);
1063 if (nfibh
.sbh
!= nfibh
.ebh
)
1069 if (S_ISDIR(old_inode
->i_mode
)) {
1070 int offset
= udf_ext0_offset(old_inode
);
1073 retval
= -ENOTEMPTY
;
1074 if (!empty_dir(new_inode
))
1078 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
1079 dir_fi
= udf_get_fileident(
1080 old_iinfo
->i_ext
.i_data
-
1082 sizeof(struct extendedFileEntry
) :
1083 sizeof(struct fileEntry
)),
1084 old_inode
->i_sb
->s_blocksize
, &offset
);
1086 dir_bh
= udf_bread(old_inode
, 0, 0, &retval
);
1089 dir_fi
= udf_get_fileident(dir_bh
->b_data
,
1090 old_inode
->i_sb
->s_blocksize
, &offset
);
1094 tloc
= lelb_to_cpu(dir_fi
->icb
.extLocation
);
1095 if (udf_get_lb_pblock(old_inode
->i_sb
, &tloc
, 0) !=
1100 nfi
= udf_add_entry(new_dir
, new_dentry
, &nfibh
, &ncfi
,
1107 * Like most other Unix systems, set the ctime for inodes on a
1110 old_inode
->i_ctime
= current_fs_time(old_inode
->i_sb
);
1111 mark_inode_dirty(old_inode
);
1116 ncfi
.fileVersionNum
= ocfi
.fileVersionNum
;
1117 ncfi
.fileCharacteristics
= ocfi
.fileCharacteristics
;
1118 memcpy(&(ncfi
.icb
), &(ocfi
.icb
), sizeof(struct long_ad
));
1119 udf_write_fi(new_dir
, &ncfi
, nfi
, &nfibh
, NULL
, NULL
);
1121 /* The old fid may have moved - find it again */
1122 ofi
= udf_find_entry(old_dir
, &old_dentry
->d_name
, &ofibh
, &ocfi
);
1123 udf_delete_entry(old_dir
, ofi
, &ofibh
, &ocfi
);
1126 new_inode
->i_ctime
= current_fs_time(new_inode
->i_sb
);
1127 inode_dec_link_count(new_inode
);
1129 old_dir
->i_ctime
= old_dir
->i_mtime
= current_fs_time(old_dir
->i_sb
);
1130 mark_inode_dirty(old_dir
);
1133 dir_fi
->icb
.extLocation
= cpu_to_lelb(UDF_I(new_dir
)->i_location
);
1134 udf_update_tag((char *)dir_fi
,
1135 (sizeof(struct fileIdentDesc
) +
1136 le16_to_cpu(dir_fi
->lengthOfImpUse
) + 3) & ~3);
1137 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1138 mark_inode_dirty(old_inode
);
1140 mark_buffer_dirty_inode(dir_bh
, old_inode
);
1142 inode_dec_link_count(old_dir
);
1144 inode_dec_link_count(new_inode
);
1147 mark_inode_dirty(new_dir
);
1152 if (ofibh
.sbh
!= ofibh
.ebh
)
1162 if (nfibh
.sbh
!= nfibh
.ebh
)
1170 static struct dentry
*udf_get_parent(struct dentry
*child
)
1172 struct kernel_lb_addr tloc
;
1173 struct inode
*inode
= NULL
;
1174 struct qstr dotdot
= QSTR_INIT("..", 2);
1175 struct fileIdentDesc cfi
;
1176 struct udf_fileident_bh fibh
;
1178 if (!udf_find_entry(child
->d_inode
, &dotdot
, &fibh
, &cfi
))
1179 return ERR_PTR(-EACCES
);
1181 if (fibh
.sbh
!= fibh
.ebh
)
1185 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
1186 inode
= udf_iget(child
->d_inode
->i_sb
, &tloc
);
1188 return ERR_CAST(inode
);
1190 return d_obtain_alias(inode
);
1194 static struct dentry
*udf_nfs_get_inode(struct super_block
*sb
, u32 block
,
1195 u16 partref
, __u32 generation
)
1197 struct inode
*inode
;
1198 struct kernel_lb_addr loc
;
1201 return ERR_PTR(-ESTALE
);
1203 loc
.logicalBlockNum
= block
;
1204 loc
.partitionReferenceNum
= partref
;
1205 inode
= udf_iget(sb
, &loc
);
1208 return ERR_CAST(inode
);
1210 if (generation
&& inode
->i_generation
!= generation
) {
1212 return ERR_PTR(-ESTALE
);
1214 return d_obtain_alias(inode
);
1217 static struct dentry
*udf_fh_to_dentry(struct super_block
*sb
,
1218 struct fid
*fid
, int fh_len
, int fh_type
)
1220 if ((fh_len
!= 3 && fh_len
!= 5) ||
1221 (fh_type
!= FILEID_UDF_WITH_PARENT
&&
1222 fh_type
!= FILEID_UDF_WITHOUT_PARENT
))
1225 return udf_nfs_get_inode(sb
, fid
->udf
.block
, fid
->udf
.partref
,
1226 fid
->udf
.generation
);
1229 static struct dentry
*udf_fh_to_parent(struct super_block
*sb
,
1230 struct fid
*fid
, int fh_len
, int fh_type
)
1232 if (fh_len
!= 5 || fh_type
!= FILEID_UDF_WITH_PARENT
)
1235 return udf_nfs_get_inode(sb
, fid
->udf
.parent_block
,
1236 fid
->udf
.parent_partref
,
1237 fid
->udf
.parent_generation
);
1239 static int udf_encode_fh(struct inode
*inode
, __u32
*fh
, int *lenp
,
1240 struct inode
*parent
)
1243 struct kernel_lb_addr location
= UDF_I(inode
)->i_location
;
1244 struct fid
*fid
= (struct fid
*)fh
;
1245 int type
= FILEID_UDF_WITHOUT_PARENT
;
1247 if (parent
&& (len
< 5)) {
1249 return FILEID_INVALID
;
1250 } else if (len
< 3) {
1252 return FILEID_INVALID
;
1256 fid
->udf
.block
= location
.logicalBlockNum
;
1257 fid
->udf
.partref
= location
.partitionReferenceNum
;
1258 fid
->udf
.parent_partref
= 0;
1259 fid
->udf
.generation
= inode
->i_generation
;
1262 location
= UDF_I(parent
)->i_location
;
1263 fid
->udf
.parent_block
= location
.logicalBlockNum
;
1264 fid
->udf
.parent_partref
= location
.partitionReferenceNum
;
1265 fid
->udf
.parent_generation
= inode
->i_generation
;
1267 type
= FILEID_UDF_WITH_PARENT
;
1273 const struct export_operations udf_export_ops
= {
1274 .encode_fh
= udf_encode_fh
,
1275 .fh_to_dentry
= udf_fh_to_dentry
,
1276 .fh_to_parent
= udf_fh_to_parent
,
1277 .get_parent
= udf_get_parent
,
1280 const struct inode_operations udf_dir_inode_operations
= {
1281 .lookup
= udf_lookup
,
1282 .create
= udf_create
,
1284 .unlink
= udf_unlink
,
1285 .symlink
= udf_symlink
,
1289 .rename
= udf_rename
,
1290 .tmpfile
= udf_tmpfile
,
1292 const struct inode_operations udf_symlink_inode_operations
= {
1293 .readlink
= generic_readlink
,
1294 .follow_link
= page_follow_link_light
,
1295 .put_link
= page_put_link
,