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/sched.h>
31 #include <linux/crc-itu-t.h>
32 #include <linux/exportfs.h>
34 static inline int udf_match(int len1
, const unsigned char *name1
, int len2
,
35 const unsigned char *name2
)
40 return !memcmp(name1
, name2
, len1
);
43 int udf_write_fi(struct inode
*inode
, struct fileIdentDesc
*cfi
,
44 struct fileIdentDesc
*sfi
, struct udf_fileident_bh
*fibh
,
45 uint8_t *impuse
, uint8_t *fileident
)
47 uint16_t crclen
= fibh
->eoffset
- fibh
->soffset
- sizeof(struct tag
);
50 uint16_t liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
51 uint8_t lfi
= cfi
->lengthFileIdent
;
52 int padlen
= fibh
->eoffset
- fibh
->soffset
- liu
- lfi
-
53 sizeof(struct fileIdentDesc
);
56 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
59 offset
= fibh
->soffset
+ sizeof(struct fileIdentDesc
);
62 if (adinicb
|| (offset
+ liu
< 0)) {
63 memcpy((uint8_t *)sfi
->impUse
, impuse
, liu
);
64 } else if (offset
>= 0) {
65 memcpy(fibh
->ebh
->b_data
+ offset
, impuse
, liu
);
67 memcpy((uint8_t *)sfi
->impUse
, impuse
, -offset
);
68 memcpy(fibh
->ebh
->b_data
, impuse
- offset
,
76 if (adinicb
|| (offset
+ lfi
< 0)) {
77 memcpy((uint8_t *)sfi
->fileIdent
+ liu
, fileident
, lfi
);
78 } else if (offset
>= 0) {
79 memcpy(fibh
->ebh
->b_data
+ offset
, fileident
, lfi
);
81 memcpy((uint8_t *)sfi
->fileIdent
+ liu
, fileident
,
83 memcpy(fibh
->ebh
->b_data
, fileident
- offset
,
90 if (adinicb
|| (offset
+ padlen
< 0)) {
91 memset((uint8_t *)sfi
->padding
+ liu
+ lfi
, 0x00, padlen
);
92 } else if (offset
>= 0) {
93 memset(fibh
->ebh
->b_data
+ offset
, 0x00, padlen
);
95 memset((uint8_t *)sfi
->padding
+ liu
+ lfi
, 0x00, -offset
);
96 memset(fibh
->ebh
->b_data
, 0x00, padlen
+ offset
);
99 crc
= crc_itu_t(0, (uint8_t *)cfi
+ sizeof(struct tag
),
100 sizeof(struct fileIdentDesc
) - sizeof(struct tag
));
102 if (fibh
->sbh
== fibh
->ebh
) {
103 crc
= crc_itu_t(crc
, (uint8_t *)sfi
->impUse
,
104 crclen
+ sizeof(struct tag
) -
105 sizeof(struct fileIdentDesc
));
106 } else if (sizeof(struct fileIdentDesc
) >= -fibh
->soffset
) {
107 crc
= crc_itu_t(crc
, fibh
->ebh
->b_data
+
108 sizeof(struct fileIdentDesc
) +
110 crclen
+ sizeof(struct tag
) -
111 sizeof(struct fileIdentDesc
));
113 crc
= crc_itu_t(crc
, (uint8_t *)sfi
->impUse
,
114 -fibh
->soffset
- sizeof(struct fileIdentDesc
));
115 crc
= crc_itu_t(crc
, fibh
->ebh
->b_data
, fibh
->eoffset
);
118 cfi
->descTag
.descCRC
= cpu_to_le16(crc
);
119 cfi
->descTag
.descCRCLength
= cpu_to_le16(crclen
);
120 cfi
->descTag
.tagChecksum
= udf_tag_checksum(&cfi
->descTag
);
122 if (adinicb
|| (sizeof(struct fileIdentDesc
) <= -fibh
->soffset
)) {
123 memcpy((uint8_t *)sfi
, (uint8_t *)cfi
,
124 sizeof(struct fileIdentDesc
));
126 memcpy((uint8_t *)sfi
, (uint8_t *)cfi
, -fibh
->soffset
);
127 memcpy(fibh
->ebh
->b_data
, (uint8_t *)cfi
- fibh
->soffset
,
128 sizeof(struct fileIdentDesc
) + fibh
->soffset
);
132 mark_inode_dirty(inode
);
134 if (fibh
->sbh
!= fibh
->ebh
)
135 mark_buffer_dirty_inode(fibh
->ebh
, inode
);
136 mark_buffer_dirty_inode(fibh
->sbh
, inode
);
142 * udf_find_entry - find entry in given directory.
144 * @dir: directory inode to search in
145 * @child: qstr of the name
146 * @fibh: buffer head / inode with file identifier descriptor we found
147 * @cfi: found file identifier descriptor with given name
149 * This function searches in the directory @dir for a file name @child. When
150 * found, @fibh points to the buffer head(s) (bh is NULL for in ICB
151 * directories) containing the file identifier descriptor (FID). In that case
152 * the function returns pointer to the FID in the buffer or inode - but note
153 * that FID may be split among two buffers (blocks) so accessing it via that
154 * pointer isn't easily possible. This pointer can be used only as an iterator
155 * for other directory manipulation functions. For inspection of the FID @cfi
156 * can be used - the found FID is copied there.
158 * Returns pointer to FID, NULL when nothing found, or error code.
160 static struct fileIdentDesc
*udf_find_entry(struct inode
*dir
,
161 const struct qstr
*child
,
162 struct udf_fileident_bh
*fibh
,
163 struct fileIdentDesc
*cfi
)
165 struct fileIdentDesc
*fi
= NULL
;
169 unsigned char *fname
= NULL
, *copy_name
= NULL
;
170 unsigned char *nameptr
;
174 struct kernel_lb_addr eloc
;
177 struct extent_position epos
= {};
178 struct udf_inode_info
*dinfo
= UDF_I(dir
);
179 int isdotdot
= child
->len
== 2 &&
180 child
->name
[0] == '.' && child
->name
[1] == '.';
181 struct super_block
*sb
= dir
->i_sb
;
183 size
= udf_ext0_offset(dir
) + dir
->i_size
;
184 f_pos
= udf_ext0_offset(dir
);
186 fibh
->sbh
= fibh
->ebh
= NULL
;
187 fibh
->soffset
= fibh
->eoffset
= f_pos
& (sb
->s_blocksize
- 1);
188 if (dinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
189 if (inode_bmap(dir
, f_pos
>> sb
->s_blocksize_bits
, &epos
,
190 &eloc
, &elen
, &offset
) != (EXT_RECORDED_ALLOCATED
>> 30)) {
195 block
= udf_get_lb_pblock(sb
, &eloc
, offset
);
196 if ((++offset
<< sb
->s_blocksize_bits
) < elen
) {
197 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
198 epos
.offset
-= sizeof(struct short_ad
);
199 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
200 epos
.offset
-= sizeof(struct long_ad
);
204 fibh
->sbh
= fibh
->ebh
= udf_tread(sb
, block
);
211 fname
= kmalloc(UDF_NAME_LEN
, GFP_NOFS
);
213 fi
= ERR_PTR(-ENOMEM
);
217 while (f_pos
< size
) {
218 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
225 liu
= le16_to_cpu(cfi
->lengthOfImpUse
);
226 lfi
= cfi
->lengthFileIdent
;
228 if (fibh
->sbh
== fibh
->ebh
) {
229 nameptr
= fi
->fileIdent
+ liu
;
231 int poffset
; /* Unpaded ending offset */
233 poffset
= fibh
->soffset
+ sizeof(struct fileIdentDesc
) +
237 nameptr
= (uint8_t *)(fibh
->ebh
->b_data
+
241 copy_name
= kmalloc(UDF_NAME_LEN
,
244 fi
= ERR_PTR(-ENOMEM
);
249 memcpy(nameptr
, fi
->fileIdent
+ liu
,
251 memcpy(nameptr
+ lfi
- poffset
,
252 fibh
->ebh
->b_data
, poffset
);
256 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
257 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_UNDELETE
))
261 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_HIDDEN
) != 0) {
262 if (!UDF_QUERY_FLAG(sb
, UDF_FLAG_UNHIDE
))
266 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_PARENT
) &&
273 flen
= udf_get_filename(sb
, nameptr
, lfi
, fname
, UDF_NAME_LEN
);
279 if (udf_match(flen
, fname
, child
->len
, child
->name
))
285 if (fibh
->sbh
!= fibh
->ebh
)
296 static struct dentry
*udf_lookup(struct inode
*dir
, struct dentry
*dentry
,
299 struct inode
*inode
= NULL
;
300 struct fileIdentDesc cfi
;
301 struct udf_fileident_bh fibh
;
302 struct fileIdentDesc
*fi
;
304 if (dentry
->d_name
.len
> UDF_NAME_LEN
)
305 return ERR_PTR(-ENAMETOOLONG
);
307 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
312 struct kernel_lb_addr loc
;
314 if (fibh
.sbh
!= fibh
.ebh
)
318 loc
= lelb_to_cpu(cfi
.icb
.extLocation
);
319 inode
= udf_iget(dir
->i_sb
, &loc
);
321 return ERR_CAST(inode
);
324 return d_splice_alias(inode
, dentry
);
327 static struct fileIdentDesc
*udf_add_entry(struct inode
*dir
,
328 struct dentry
*dentry
,
329 struct udf_fileident_bh
*fibh
,
330 struct fileIdentDesc
*cfi
, int *err
)
332 struct super_block
*sb
= dir
->i_sb
;
333 struct fileIdentDesc
*fi
= NULL
;
334 unsigned char *name
= NULL
;
337 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
340 struct kernel_lb_addr eloc
;
343 struct extent_position epos
= {};
344 struct udf_inode_info
*dinfo
;
346 fibh
->sbh
= fibh
->ebh
= NULL
;
347 name
= kmalloc(UDF_NAME_LEN_CS0
, GFP_NOFS
);
354 if (!dentry
->d_name
.len
) {
358 namelen
= udf_put_filename(sb
, dentry
->d_name
.name
,
360 name
, UDF_NAME_LEN_CS0
);
362 *err
= -ENAMETOOLONG
;
369 nfidlen
= ALIGN(sizeof(struct fileIdentDesc
) + namelen
, UDF_NAME_PAD
);
371 f_pos
= udf_ext0_offset(dir
);
373 fibh
->soffset
= fibh
->eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
375 if (dinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
376 if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
, &epos
,
377 &eloc
, &elen
, &offset
) != (EXT_RECORDED_ALLOCATED
>> 30)) {
378 block
= udf_get_lb_pblock(dir
->i_sb
,
379 &dinfo
->i_location
, 0);
380 fibh
->soffset
= fibh
->eoffset
= sb
->s_blocksize
;
383 block
= udf_get_lb_pblock(dir
->i_sb
, &eloc
, offset
);
384 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
385 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
386 epos
.offset
-= sizeof(struct short_ad
);
387 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
388 epos
.offset
-= sizeof(struct long_ad
);
392 fibh
->sbh
= fibh
->ebh
= udf_tread(dir
->i_sb
, block
);
398 block
= dinfo
->i_location
.logicalBlockNum
;
401 while (f_pos
< size
) {
402 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
410 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
411 if (udf_dir_entry_len(cfi
) == 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
,
431 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
&&
432 sb
->s_blocksize
- fibh
->eoffset
< nfidlen
) {
435 fibh
->soffset
-= udf_ext0_offset(dir
);
436 fibh
->eoffset
-= udf_ext0_offset(dir
);
437 f_pos
-= udf_ext0_offset(dir
);
438 if (fibh
->sbh
!= fibh
->ebh
)
441 fibh
->sbh
= fibh
->ebh
=
442 udf_expand_dir_adinicb(dir
, &block
, err
);
445 epos
.block
= dinfo
->i_location
;
446 epos
.offset
= udf_file_entry_alloc_offset(dir
);
447 /* Load extent udf_expand_dir_adinicb() has created */
448 udf_current_aext(dir
, &epos
, &eloc
, &elen
, 1);
451 /* Entry fits into current block? */
452 if (sb
->s_blocksize
- fibh
->eoffset
>= nfidlen
) {
453 fibh
->soffset
= fibh
->eoffset
;
454 fibh
->eoffset
+= nfidlen
;
455 if (fibh
->sbh
!= fibh
->ebh
) {
457 fibh
->sbh
= fibh
->ebh
;
460 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
461 block
= dinfo
->i_location
.logicalBlockNum
;
462 fi
= (struct fileIdentDesc
*)
463 (dinfo
->i_data
+ fibh
->soffset
-
464 udf_ext0_offset(dir
) +
467 block
= eloc
.logicalBlockNum
+
469 dir
->i_sb
->s_blocksize_bits
);
470 fi
= (struct fileIdentDesc
*)
471 (fibh
->sbh
->b_data
+ fibh
->soffset
);
474 /* Round up last extent in the file */
475 elen
= (elen
+ sb
->s_blocksize
- 1) & ~(sb
->s_blocksize
- 1);
476 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
477 epos
.offset
-= sizeof(struct short_ad
);
478 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
479 epos
.offset
-= sizeof(struct long_ad
);
480 udf_write_aext(dir
, &epos
, &eloc
, elen
, 1);
481 dinfo
->i_lenExtents
= (dinfo
->i_lenExtents
+ sb
->s_blocksize
482 - 1) & ~(sb
->s_blocksize
- 1);
484 fibh
->soffset
= fibh
->eoffset
- sb
->s_blocksize
;
485 fibh
->eoffset
+= nfidlen
- sb
->s_blocksize
;
486 if (fibh
->sbh
!= fibh
->ebh
) {
488 fibh
->sbh
= fibh
->ebh
;
491 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
492 dir
->i_sb
->s_blocksize_bits
);
493 fibh
->ebh
= udf_bread(dir
,
494 f_pos
>> dir
->i_sb
->s_blocksize_bits
, 1, err
);
497 /* Extents could have been merged, invalidate our position */
500 epos
.block
= dinfo
->i_location
;
501 epos
.offset
= udf_file_entry_alloc_offset(dir
);
503 if (!fibh
->soffset
) {
504 /* Find the freshly allocated block */
505 while (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
506 (EXT_RECORDED_ALLOCATED
>> 30))
508 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
509 dir
->i_sb
->s_blocksize_bits
);
511 fibh
->sbh
= fibh
->ebh
;
512 fi
= (struct fileIdentDesc
*)(fibh
->sbh
->b_data
);
514 fi
= (struct fileIdentDesc
*)
515 (fibh
->sbh
->b_data
+ sb
->s_blocksize
+
520 memset(cfi
, 0, sizeof(struct fileIdentDesc
));
521 if (UDF_SB(sb
)->s_udfrev
>= 0x0200)
522 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 3, 1, block
,
525 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 2, 1, block
,
527 cfi
->fileVersionNum
= cpu_to_le16(1);
528 cfi
->lengthFileIdent
= namelen
;
529 cfi
->lengthOfImpUse
= cpu_to_le16(0);
530 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
, name
)) {
531 dir
->i_size
+= nfidlen
;
532 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
533 dinfo
->i_lenAlloc
+= nfidlen
;
535 /* Find the last extent and truncate it to proper size */
536 while (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
537 (EXT_RECORDED_ALLOCATED
>> 30))
539 elen
-= dinfo
->i_lenExtents
- dir
->i_size
;
540 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
541 epos
.offset
-= sizeof(struct short_ad
);
542 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
543 epos
.offset
-= sizeof(struct long_ad
);
544 udf_write_aext(dir
, &epos
, &eloc
, elen
, 1);
545 dinfo
->i_lenExtents
= dir
->i_size
;
548 mark_inode_dirty(dir
);
557 if (fibh
->sbh
!= fibh
->ebh
)
566 static int udf_delete_entry(struct inode
*inode
, struct fileIdentDesc
*fi
,
567 struct udf_fileident_bh
*fibh
,
568 struct fileIdentDesc
*cfi
)
570 cfi
->fileCharacteristics
|= FID_FILE_CHAR_DELETED
;
572 if (UDF_QUERY_FLAG(inode
->i_sb
, UDF_FLAG_STRICT
))
573 memset(&(cfi
->icb
), 0x00, sizeof(struct long_ad
));
575 return udf_write_fi(inode
, cfi
, fi
, fibh
, NULL
, NULL
);
578 static int udf_add_nondir(struct dentry
*dentry
, struct inode
*inode
)
580 struct udf_inode_info
*iinfo
= UDF_I(inode
);
581 struct inode
*dir
= d_inode(dentry
->d_parent
);
582 struct udf_fileident_bh fibh
;
583 struct fileIdentDesc cfi
, *fi
;
586 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
588 inode_dec_link_count(inode
);
589 discard_new_inode(inode
);
592 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
593 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
594 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
595 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
596 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
597 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
598 mark_inode_dirty(dir
);
599 if (fibh
.sbh
!= fibh
.ebh
)
602 d_instantiate_new(dentry
, inode
);
607 static int udf_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
610 struct inode
*inode
= udf_new_inode(dir
, mode
);
613 return PTR_ERR(inode
);
615 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
616 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
618 inode
->i_data
.a_ops
= &udf_aops
;
619 inode
->i_op
= &udf_file_inode_operations
;
620 inode
->i_fop
= &udf_file_operations
;
621 mark_inode_dirty(inode
);
623 return udf_add_nondir(dentry
, inode
);
626 static int udf_tmpfile(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
628 struct inode
*inode
= udf_new_inode(dir
, mode
);
631 return PTR_ERR(inode
);
633 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
634 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
636 inode
->i_data
.a_ops
= &udf_aops
;
637 inode
->i_op
= &udf_file_inode_operations
;
638 inode
->i_fop
= &udf_file_operations
;
639 mark_inode_dirty(inode
);
640 d_tmpfile(dentry
, inode
);
641 unlock_new_inode(inode
);
645 static int udf_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
650 if (!old_valid_dev(rdev
))
653 inode
= udf_new_inode(dir
, mode
);
655 return PTR_ERR(inode
);
657 init_special_inode(inode
, mode
, rdev
);
658 return udf_add_nondir(dentry
, inode
);
661 static int udf_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
664 struct udf_fileident_bh fibh
;
665 struct fileIdentDesc cfi
, *fi
;
667 struct udf_inode_info
*dinfo
= UDF_I(dir
);
668 struct udf_inode_info
*iinfo
;
670 inode
= udf_new_inode(dir
, S_IFDIR
| mode
);
672 return PTR_ERR(inode
);
674 iinfo
= UDF_I(inode
);
675 inode
->i_op
= &udf_dir_inode_operations
;
676 inode
->i_fop
= &udf_dir_operations
;
677 fi
= udf_add_entry(inode
, NULL
, &fibh
, &cfi
, &err
);
679 inode_dec_link_count(inode
);
680 discard_new_inode(inode
);
684 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
685 cfi
.icb
.extLocation
= cpu_to_lelb(dinfo
->i_location
);
686 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
687 cpu_to_le32(dinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
688 cfi
.fileCharacteristics
=
689 FID_FILE_CHAR_DIRECTORY
| FID_FILE_CHAR_PARENT
;
690 udf_write_fi(inode
, &cfi
, fi
, &fibh
, NULL
, NULL
);
692 mark_inode_dirty(inode
);
694 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
697 mark_inode_dirty(inode
);
698 discard_new_inode(inode
);
701 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
702 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
703 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
704 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
705 cfi
.fileCharacteristics
|= FID_FILE_CHAR_DIRECTORY
;
706 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
708 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
709 mark_inode_dirty(dir
);
710 d_instantiate_new(dentry
, inode
);
711 if (fibh
.sbh
!= fibh
.ebh
)
720 static int empty_dir(struct inode
*dir
)
722 struct fileIdentDesc
*fi
, cfi
;
723 struct udf_fileident_bh fibh
;
725 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
727 struct kernel_lb_addr eloc
;
730 struct extent_position epos
= {};
731 struct udf_inode_info
*dinfo
= UDF_I(dir
);
733 f_pos
= udf_ext0_offset(dir
);
734 fibh
.soffset
= fibh
.eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
736 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
737 fibh
.sbh
= fibh
.ebh
= NULL
;
738 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
739 &epos
, &eloc
, &elen
, &offset
) ==
740 (EXT_RECORDED_ALLOCATED
>> 30)) {
741 block
= udf_get_lb_pblock(dir
->i_sb
, &eloc
, offset
);
742 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
743 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
744 epos
.offset
-= sizeof(struct short_ad
);
745 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
746 epos
.offset
-= sizeof(struct long_ad
);
750 fibh
.sbh
= fibh
.ebh
= udf_tread(dir
->i_sb
, block
);
760 while (f_pos
< size
) {
761 fi
= udf_fileident_read(dir
, &f_pos
, &fibh
, &cfi
, &epos
, &eloc
,
764 if (fibh
.sbh
!= fibh
.ebh
)
771 if (cfi
.lengthFileIdent
&&
772 (cfi
.fileCharacteristics
& FID_FILE_CHAR_DELETED
) == 0) {
773 if (fibh
.sbh
!= fibh
.ebh
)
781 if (fibh
.sbh
!= fibh
.ebh
)
789 static int udf_rmdir(struct inode
*dir
, struct dentry
*dentry
)
792 struct inode
*inode
= d_inode(dentry
);
793 struct udf_fileident_bh fibh
;
794 struct fileIdentDesc
*fi
, cfi
;
795 struct kernel_lb_addr tloc
;
798 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
799 if (IS_ERR_OR_NULL(fi
)) {
801 retval
= PTR_ERR(fi
);
806 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
807 if (udf_get_lb_pblock(dir
->i_sb
, &tloc
, 0) != inode
->i_ino
)
810 if (!empty_dir(inode
))
812 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
815 if (inode
->i_nlink
!= 2)
816 udf_warn(inode
->i_sb
, "empty directory has nlink != 2 (%u)\n",
820 inode_dec_link_count(dir
);
821 inode
->i_ctime
= dir
->i_ctime
= dir
->i_mtime
=
823 mark_inode_dirty(dir
);
826 if (fibh
.sbh
!= fibh
.ebh
)
834 static int udf_unlink(struct inode
*dir
, struct dentry
*dentry
)
837 struct inode
*inode
= d_inode(dentry
);
838 struct udf_fileident_bh fibh
;
839 struct fileIdentDesc
*fi
;
840 struct fileIdentDesc cfi
;
841 struct kernel_lb_addr tloc
;
844 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
846 if (IS_ERR_OR_NULL(fi
)) {
848 retval
= PTR_ERR(fi
);
853 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
854 if (udf_get_lb_pblock(dir
->i_sb
, &tloc
, 0) != inode
->i_ino
)
857 if (!inode
->i_nlink
) {
858 udf_debug("Deleting nonexistent file (%lu), %u\n",
859 inode
->i_ino
, inode
->i_nlink
);
862 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
865 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
866 mark_inode_dirty(dir
);
867 inode_dec_link_count(inode
);
868 inode
->i_ctime
= dir
->i_ctime
;
872 if (fibh
.sbh
!= fibh
.ebh
)
880 static int udf_symlink(struct inode
*dir
, struct dentry
*dentry
,
883 struct inode
*inode
= udf_new_inode(dir
, S_IFLNK
| 0777);
884 struct pathComponent
*pc
;
885 const char *compstart
;
886 struct extent_position epos
= {};
887 int eoffset
, elen
= 0;
891 unsigned char *name
= NULL
;
893 struct udf_inode_info
*iinfo
;
894 struct super_block
*sb
= dir
->i_sb
;
897 return PTR_ERR(inode
);
899 iinfo
= UDF_I(inode
);
900 down_write(&iinfo
->i_data_sem
);
901 name
= kmalloc(UDF_NAME_LEN_CS0
, GFP_NOFS
);
907 inode
->i_data
.a_ops
= &udf_symlink_aops
;
908 inode
->i_op
= &udf_symlink_inode_operations
;
909 inode_nohighmem(inode
);
911 if (iinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
912 struct kernel_lb_addr eloc
;
915 block
= udf_new_block(sb
, inode
,
916 iinfo
->i_location
.partitionReferenceNum
,
917 iinfo
->i_location
.logicalBlockNum
, &err
);
920 epos
.block
= iinfo
->i_location
;
921 epos
.offset
= udf_file_entry_alloc_offset(inode
);
923 eloc
.logicalBlockNum
= block
;
924 eloc
.partitionReferenceNum
=
925 iinfo
->i_location
.partitionReferenceNum
;
926 bsize
= sb
->s_blocksize
;
927 iinfo
->i_lenExtents
= bsize
;
928 udf_add_aext(inode
, &epos
, &eloc
, bsize
, 0);
931 block
= udf_get_pblock(sb
, block
,
932 iinfo
->i_location
.partitionReferenceNum
,
934 epos
.bh
= udf_tgetblk(sb
, block
);
935 lock_buffer(epos
.bh
);
936 memset(epos
.bh
->b_data
, 0x00, bsize
);
937 set_buffer_uptodate(epos
.bh
);
938 unlock_buffer(epos
.bh
);
939 mark_buffer_dirty_inode(epos
.bh
, inode
);
940 ea
= epos
.bh
->b_data
+ udf_ext0_offset(inode
);
942 ea
= iinfo
->i_data
+ iinfo
->i_lenEAttr
;
944 eoffset
= sb
->s_blocksize
- udf_ext0_offset(inode
);
945 pc
= (struct pathComponent
*)ea
;
947 if (*symname
== '/') {
950 } while (*symname
== '/');
952 pc
->componentType
= 1;
953 pc
->lengthComponentIdent
= 0;
954 pc
->componentFileVersionNum
= 0;
955 elen
+= sizeof(struct pathComponent
);
961 if (elen
+ sizeof(struct pathComponent
) > eoffset
)
964 pc
= (struct pathComponent
*)(ea
+ elen
);
970 } while (*symname
&& *symname
!= '/');
972 pc
->componentType
= 5;
973 pc
->lengthComponentIdent
= 0;
974 pc
->componentFileVersionNum
= 0;
975 if (compstart
[0] == '.') {
976 if ((symname
- compstart
) == 1)
977 pc
->componentType
= 4;
978 else if ((symname
- compstart
) == 2 &&
980 pc
->componentType
= 3;
983 if (pc
->componentType
== 5) {
984 namelen
= udf_put_filename(sb
, compstart
,
986 name
, UDF_NAME_LEN_CS0
);
990 if (elen
+ sizeof(struct pathComponent
) + namelen
>
994 pc
->lengthComponentIdent
= namelen
;
996 memcpy(pc
->componentIdent
, name
, namelen
);
999 elen
+= sizeof(struct pathComponent
) + pc
->lengthComponentIdent
;
1004 } while (*symname
== '/');
1009 inode
->i_size
= elen
;
1010 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1011 iinfo
->i_lenAlloc
= inode
->i_size
;
1013 udf_truncate_tail_extent(inode
);
1014 mark_inode_dirty(inode
);
1015 up_write(&iinfo
->i_data_sem
);
1017 err
= udf_add_nondir(dentry
, inode
);
1023 up_write(&iinfo
->i_data_sem
);
1024 inode_dec_link_count(inode
);
1025 discard_new_inode(inode
);
1029 static int udf_link(struct dentry
*old_dentry
, struct inode
*dir
,
1030 struct dentry
*dentry
)
1032 struct inode
*inode
= d_inode(old_dentry
);
1033 struct udf_fileident_bh fibh
;
1034 struct fileIdentDesc cfi
, *fi
;
1037 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
1041 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
1042 cfi
.icb
.extLocation
= cpu_to_lelb(UDF_I(inode
)->i_location
);
1043 if (UDF_SB(inode
->i_sb
)->s_lvid_bh
) {
1044 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
1045 cpu_to_le32(lvid_get_unique_id(inode
->i_sb
));
1047 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
1048 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1049 mark_inode_dirty(dir
);
1051 if (fibh
.sbh
!= fibh
.ebh
)
1055 inode
->i_ctime
= current_time(inode
);
1056 mark_inode_dirty(inode
);
1057 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
1058 mark_inode_dirty(dir
);
1060 d_instantiate(dentry
, inode
);
1065 /* Anybody can rename anything with this: the permission checks are left to the
1066 * higher-level routines.
1068 static int udf_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1069 struct inode
*new_dir
, struct dentry
*new_dentry
,
1072 struct inode
*old_inode
= d_inode(old_dentry
);
1073 struct inode
*new_inode
= d_inode(new_dentry
);
1074 struct udf_fileident_bh ofibh
, nfibh
;
1075 struct fileIdentDesc
*ofi
= NULL
, *nfi
= NULL
, *dir_fi
= NULL
;
1076 struct fileIdentDesc ocfi
, ncfi
;
1077 struct buffer_head
*dir_bh
= NULL
;
1078 int retval
= -ENOENT
;
1079 struct kernel_lb_addr tloc
;
1080 struct udf_inode_info
*old_iinfo
= UDF_I(old_inode
);
1082 if (flags
& ~RENAME_NOREPLACE
)
1085 ofi
= udf_find_entry(old_dir
, &old_dentry
->d_name
, &ofibh
, &ocfi
);
1087 retval
= PTR_ERR(ofi
);
1091 if (ofibh
.sbh
!= ofibh
.ebh
)
1095 tloc
= lelb_to_cpu(ocfi
.icb
.extLocation
);
1096 if (!ofi
|| udf_get_lb_pblock(old_dir
->i_sb
, &tloc
, 0)
1097 != old_inode
->i_ino
)
1100 nfi
= udf_find_entry(new_dir
, &new_dentry
->d_name
, &nfibh
, &ncfi
);
1102 retval
= PTR_ERR(nfi
);
1105 if (nfi
&& !new_inode
) {
1106 if (nfibh
.sbh
!= nfibh
.ebh
)
1111 if (S_ISDIR(old_inode
->i_mode
)) {
1112 int offset
= udf_ext0_offset(old_inode
);
1115 retval
= -ENOTEMPTY
;
1116 if (!empty_dir(new_inode
))
1120 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
1121 dir_fi
= udf_get_fileident(
1124 sizeof(struct extendedFileEntry
) :
1125 sizeof(struct fileEntry
)),
1126 old_inode
->i_sb
->s_blocksize
, &offset
);
1128 dir_bh
= udf_bread(old_inode
, 0, 0, &retval
);
1131 dir_fi
= udf_get_fileident(dir_bh
->b_data
,
1132 old_inode
->i_sb
->s_blocksize
, &offset
);
1136 tloc
= lelb_to_cpu(dir_fi
->icb
.extLocation
);
1137 if (udf_get_lb_pblock(old_inode
->i_sb
, &tloc
, 0) !=
1142 nfi
= udf_add_entry(new_dir
, new_dentry
, &nfibh
, &ncfi
,
1149 * Like most other Unix systems, set the ctime for inodes on a
1152 old_inode
->i_ctime
= current_time(old_inode
);
1153 mark_inode_dirty(old_inode
);
1158 ncfi
.fileVersionNum
= ocfi
.fileVersionNum
;
1159 ncfi
.fileCharacteristics
= ocfi
.fileCharacteristics
;
1160 memcpy(&(ncfi
.icb
), &(ocfi
.icb
), sizeof(ocfi
.icb
));
1161 udf_write_fi(new_dir
, &ncfi
, nfi
, &nfibh
, NULL
, NULL
);
1163 /* The old fid may have moved - find it again */
1164 ofi
= udf_find_entry(old_dir
, &old_dentry
->d_name
, &ofibh
, &ocfi
);
1165 udf_delete_entry(old_dir
, ofi
, &ofibh
, &ocfi
);
1168 new_inode
->i_ctime
= current_time(new_inode
);
1169 inode_dec_link_count(new_inode
);
1171 old_dir
->i_ctime
= old_dir
->i_mtime
= current_time(old_dir
);
1172 new_dir
->i_ctime
= new_dir
->i_mtime
= current_time(new_dir
);
1173 mark_inode_dirty(old_dir
);
1174 mark_inode_dirty(new_dir
);
1177 dir_fi
->icb
.extLocation
= cpu_to_lelb(UDF_I(new_dir
)->i_location
);
1178 udf_update_tag((char *)dir_fi
, udf_dir_entry_len(dir_fi
));
1179 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1180 mark_inode_dirty(old_inode
);
1182 mark_buffer_dirty_inode(dir_bh
, old_inode
);
1184 inode_dec_link_count(old_dir
);
1186 inode_dec_link_count(new_inode
);
1189 mark_inode_dirty(new_dir
);
1194 if (ofibh
.sbh
!= ofibh
.ebh
)
1204 if (nfibh
.sbh
!= nfibh
.ebh
)
1212 static struct dentry
*udf_get_parent(struct dentry
*child
)
1214 struct kernel_lb_addr tloc
;
1215 struct inode
*inode
= NULL
;
1216 struct qstr dotdot
= QSTR_INIT("..", 2);
1217 struct fileIdentDesc cfi
;
1218 struct udf_fileident_bh fibh
;
1220 if (!udf_find_entry(d_inode(child
), &dotdot
, &fibh
, &cfi
))
1221 return ERR_PTR(-EACCES
);
1223 if (fibh
.sbh
!= fibh
.ebh
)
1227 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
1228 inode
= udf_iget(child
->d_sb
, &tloc
);
1230 return ERR_CAST(inode
);
1232 return d_obtain_alias(inode
);
1236 static struct dentry
*udf_nfs_get_inode(struct super_block
*sb
, u32 block
,
1237 u16 partref
, __u32 generation
)
1239 struct inode
*inode
;
1240 struct kernel_lb_addr loc
;
1243 return ERR_PTR(-ESTALE
);
1245 loc
.logicalBlockNum
= block
;
1246 loc
.partitionReferenceNum
= partref
;
1247 inode
= udf_iget(sb
, &loc
);
1250 return ERR_CAST(inode
);
1252 if (generation
&& inode
->i_generation
!= generation
) {
1254 return ERR_PTR(-ESTALE
);
1256 return d_obtain_alias(inode
);
1259 static struct dentry
*udf_fh_to_dentry(struct super_block
*sb
,
1260 struct fid
*fid
, int fh_len
, int fh_type
)
1263 (fh_type
!= FILEID_UDF_WITH_PARENT
&&
1264 fh_type
!= FILEID_UDF_WITHOUT_PARENT
))
1267 return udf_nfs_get_inode(sb
, fid
->udf
.block
, fid
->udf
.partref
,
1268 fid
->udf
.generation
);
1271 static struct dentry
*udf_fh_to_parent(struct super_block
*sb
,
1272 struct fid
*fid
, int fh_len
, int fh_type
)
1274 if (fh_len
< 5 || fh_type
!= FILEID_UDF_WITH_PARENT
)
1277 return udf_nfs_get_inode(sb
, fid
->udf
.parent_block
,
1278 fid
->udf
.parent_partref
,
1279 fid
->udf
.parent_generation
);
1281 static int udf_encode_fh(struct inode
*inode
, __u32
*fh
, int *lenp
,
1282 struct inode
*parent
)
1285 struct kernel_lb_addr location
= UDF_I(inode
)->i_location
;
1286 struct fid
*fid
= (struct fid
*)fh
;
1287 int type
= FILEID_UDF_WITHOUT_PARENT
;
1289 if (parent
&& (len
< 5)) {
1291 return FILEID_INVALID
;
1292 } else if (len
< 3) {
1294 return FILEID_INVALID
;
1298 fid
->udf
.block
= location
.logicalBlockNum
;
1299 fid
->udf
.partref
= location
.partitionReferenceNum
;
1300 fid
->udf
.parent_partref
= 0;
1301 fid
->udf
.generation
= inode
->i_generation
;
1304 location
= UDF_I(parent
)->i_location
;
1305 fid
->udf
.parent_block
= location
.logicalBlockNum
;
1306 fid
->udf
.parent_partref
= location
.partitionReferenceNum
;
1307 fid
->udf
.parent_generation
= inode
->i_generation
;
1309 type
= FILEID_UDF_WITH_PARENT
;
1315 const struct export_operations udf_export_ops
= {
1316 .encode_fh
= udf_encode_fh
,
1317 .fh_to_dentry
= udf_fh_to_dentry
,
1318 .fh_to_parent
= udf_fh_to_parent
,
1319 .get_parent
= udf_get_parent
,
1322 const struct inode_operations udf_dir_inode_operations
= {
1323 .lookup
= udf_lookup
,
1324 .create
= udf_create
,
1326 .unlink
= udf_unlink
,
1327 .symlink
= udf_symlink
,
1331 .rename
= udf_rename
,
1332 .tmpfile
= udf_tmpfile
,