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
);
308 /* temporary shorthand for specifying files by inode number */
309 if (!strncmp(dentry
->d_name
.name
, ".B=", 3)) {
310 struct kernel_lb_addr lb
= {
311 .logicalBlockNum
= 0,
312 .partitionReferenceNum
=
313 simple_strtoul(dentry
->d_name
.name
+ 3,
316 inode
= udf_iget(dir
->i_sb
, lb
);
320 #endif /* UDF_RECOVERY */
322 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
327 struct kernel_lb_addr loc
;
329 if (fibh
.sbh
!= fibh
.ebh
)
333 loc
= lelb_to_cpu(cfi
.icb
.extLocation
);
334 inode
= udf_iget(dir
->i_sb
, &loc
);
336 return ERR_CAST(inode
);
339 return d_splice_alias(inode
, dentry
);
342 static struct fileIdentDesc
*udf_add_entry(struct inode
*dir
,
343 struct dentry
*dentry
,
344 struct udf_fileident_bh
*fibh
,
345 struct fileIdentDesc
*cfi
, int *err
)
347 struct super_block
*sb
= dir
->i_sb
;
348 struct fileIdentDesc
*fi
= NULL
;
349 unsigned char *name
= NULL
;
352 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
355 struct kernel_lb_addr eloc
;
358 struct extent_position epos
= {};
359 struct udf_inode_info
*dinfo
;
361 fibh
->sbh
= fibh
->ebh
= NULL
;
362 name
= kmalloc(UDF_NAME_LEN_CS0
, GFP_NOFS
);
369 if (!dentry
->d_name
.len
) {
373 namelen
= udf_put_filename(sb
, dentry
->d_name
.name
,
375 name
, UDF_NAME_LEN_CS0
);
377 *err
= -ENAMETOOLONG
;
384 nfidlen
= ALIGN(sizeof(struct fileIdentDesc
) + namelen
, UDF_NAME_PAD
);
386 f_pos
= udf_ext0_offset(dir
);
388 fibh
->soffset
= fibh
->eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
390 if (dinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
391 if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
, &epos
,
392 &eloc
, &elen
, &offset
) != (EXT_RECORDED_ALLOCATED
>> 30)) {
393 block
= udf_get_lb_pblock(dir
->i_sb
,
394 &dinfo
->i_location
, 0);
395 fibh
->soffset
= fibh
->eoffset
= sb
->s_blocksize
;
398 block
= udf_get_lb_pblock(dir
->i_sb
, &eloc
, offset
);
399 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
400 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
401 epos
.offset
-= sizeof(struct short_ad
);
402 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
403 epos
.offset
-= sizeof(struct long_ad
);
407 fibh
->sbh
= fibh
->ebh
= udf_tread(dir
->i_sb
, block
);
413 block
= dinfo
->i_location
.logicalBlockNum
;
416 while (f_pos
< size
) {
417 fi
= udf_fileident_read(dir
, &f_pos
, fibh
, cfi
, &epos
, &eloc
,
425 if ((cfi
->fileCharacteristics
& FID_FILE_CHAR_DELETED
) != 0) {
426 if (udf_dir_entry_len(cfi
) == nfidlen
) {
427 cfi
->descTag
.tagSerialNum
= cpu_to_le16(1);
428 cfi
->fileVersionNum
= cpu_to_le16(1);
429 cfi
->fileCharacteristics
= 0;
430 cfi
->lengthFileIdent
= namelen
;
431 cfi
->lengthOfImpUse
= cpu_to_le16(0);
432 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
,
446 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
&&
447 sb
->s_blocksize
- fibh
->eoffset
< nfidlen
) {
450 fibh
->soffset
-= udf_ext0_offset(dir
);
451 fibh
->eoffset
-= udf_ext0_offset(dir
);
452 f_pos
-= udf_ext0_offset(dir
);
453 if (fibh
->sbh
!= fibh
->ebh
)
456 fibh
->sbh
= fibh
->ebh
=
457 udf_expand_dir_adinicb(dir
, &block
, err
);
460 epos
.block
= dinfo
->i_location
;
461 epos
.offset
= udf_file_entry_alloc_offset(dir
);
462 /* Load extent udf_expand_dir_adinicb() has created */
463 udf_current_aext(dir
, &epos
, &eloc
, &elen
, 1);
466 /* Entry fits into current block? */
467 if (sb
->s_blocksize
- fibh
->eoffset
>= nfidlen
) {
468 fibh
->soffset
= fibh
->eoffset
;
469 fibh
->eoffset
+= nfidlen
;
470 if (fibh
->sbh
!= fibh
->ebh
) {
472 fibh
->sbh
= fibh
->ebh
;
475 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
476 block
= dinfo
->i_location
.logicalBlockNum
;
477 fi
= (struct fileIdentDesc
*)
478 (dinfo
->i_ext
.i_data
+
480 udf_ext0_offset(dir
) +
483 block
= eloc
.logicalBlockNum
+
485 dir
->i_sb
->s_blocksize_bits
);
486 fi
= (struct fileIdentDesc
*)
487 (fibh
->sbh
->b_data
+ fibh
->soffset
);
490 /* Round up last extent in the file */
491 elen
= (elen
+ sb
->s_blocksize
- 1) & ~(sb
->s_blocksize
- 1);
492 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
493 epos
.offset
-= sizeof(struct short_ad
);
494 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
495 epos
.offset
-= sizeof(struct long_ad
);
496 udf_write_aext(dir
, &epos
, &eloc
, elen
, 1);
497 dinfo
->i_lenExtents
= (dinfo
->i_lenExtents
+ sb
->s_blocksize
498 - 1) & ~(sb
->s_blocksize
- 1);
500 fibh
->soffset
= fibh
->eoffset
- sb
->s_blocksize
;
501 fibh
->eoffset
+= nfidlen
- sb
->s_blocksize
;
502 if (fibh
->sbh
!= fibh
->ebh
) {
504 fibh
->sbh
= fibh
->ebh
;
507 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
508 dir
->i_sb
->s_blocksize_bits
);
509 fibh
->ebh
= udf_bread(dir
,
510 f_pos
>> dir
->i_sb
->s_blocksize_bits
, 1, err
);
513 /* Extents could have been merged, invalidate our position */
516 epos
.block
= dinfo
->i_location
;
517 epos
.offset
= udf_file_entry_alloc_offset(dir
);
519 if (!fibh
->soffset
) {
520 /* Find the freshly allocated block */
521 while (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
522 (EXT_RECORDED_ALLOCATED
>> 30))
524 block
= eloc
.logicalBlockNum
+ ((elen
- 1) >>
525 dir
->i_sb
->s_blocksize_bits
);
527 fibh
->sbh
= fibh
->ebh
;
528 fi
= (struct fileIdentDesc
*)(fibh
->sbh
->b_data
);
530 fi
= (struct fileIdentDesc
*)
531 (fibh
->sbh
->b_data
+ sb
->s_blocksize
+
536 memset(cfi
, 0, sizeof(struct fileIdentDesc
));
537 if (UDF_SB(sb
)->s_udfrev
>= 0x0200)
538 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 3, 1, block
,
541 udf_new_tag((char *)cfi
, TAG_IDENT_FID
, 2, 1, block
,
543 cfi
->fileVersionNum
= cpu_to_le16(1);
544 cfi
->lengthFileIdent
= namelen
;
545 cfi
->lengthOfImpUse
= cpu_to_le16(0);
546 if (!udf_write_fi(dir
, cfi
, fi
, fibh
, NULL
, name
)) {
547 dir
->i_size
+= nfidlen
;
548 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
549 dinfo
->i_lenAlloc
+= nfidlen
;
551 /* Find the last extent and truncate it to proper size */
552 while (udf_next_aext(dir
, &epos
, &eloc
, &elen
, 1) ==
553 (EXT_RECORDED_ALLOCATED
>> 30))
555 elen
-= dinfo
->i_lenExtents
- dir
->i_size
;
556 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
557 epos
.offset
-= sizeof(struct short_ad
);
558 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
559 epos
.offset
-= sizeof(struct long_ad
);
560 udf_write_aext(dir
, &epos
, &eloc
, elen
, 1);
561 dinfo
->i_lenExtents
= dir
->i_size
;
564 mark_inode_dirty(dir
);
573 if (fibh
->sbh
!= fibh
->ebh
)
582 static int udf_delete_entry(struct inode
*inode
, struct fileIdentDesc
*fi
,
583 struct udf_fileident_bh
*fibh
,
584 struct fileIdentDesc
*cfi
)
586 cfi
->fileCharacteristics
|= FID_FILE_CHAR_DELETED
;
588 if (UDF_QUERY_FLAG(inode
->i_sb
, UDF_FLAG_STRICT
))
589 memset(&(cfi
->icb
), 0x00, sizeof(struct long_ad
));
591 return udf_write_fi(inode
, cfi
, fi
, fibh
, NULL
, NULL
);
594 static int udf_add_nondir(struct dentry
*dentry
, struct inode
*inode
)
596 struct udf_inode_info
*iinfo
= UDF_I(inode
);
597 struct inode
*dir
= d_inode(dentry
->d_parent
);
598 struct udf_fileident_bh fibh
;
599 struct fileIdentDesc cfi
, *fi
;
602 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
604 inode_dec_link_count(inode
);
605 discard_new_inode(inode
);
608 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
609 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
610 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
611 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
612 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
613 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
614 mark_inode_dirty(dir
);
615 if (fibh
.sbh
!= fibh
.ebh
)
618 d_instantiate_new(dentry
, inode
);
623 static int udf_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
626 struct inode
*inode
= udf_new_inode(dir
, mode
);
629 return PTR_ERR(inode
);
631 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
632 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
634 inode
->i_data
.a_ops
= &udf_aops
;
635 inode
->i_op
= &udf_file_inode_operations
;
636 inode
->i_fop
= &udf_file_operations
;
637 mark_inode_dirty(inode
);
639 return udf_add_nondir(dentry
, inode
);
642 static int udf_tmpfile(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
644 struct inode
*inode
= udf_new_inode(dir
, mode
);
647 return PTR_ERR(inode
);
649 if (UDF_I(inode
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
650 inode
->i_data
.a_ops
= &udf_adinicb_aops
;
652 inode
->i_data
.a_ops
= &udf_aops
;
653 inode
->i_op
= &udf_file_inode_operations
;
654 inode
->i_fop
= &udf_file_operations
;
655 mark_inode_dirty(inode
);
656 d_tmpfile(dentry
, inode
);
657 unlock_new_inode(inode
);
661 static int udf_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
666 if (!old_valid_dev(rdev
))
669 inode
= udf_new_inode(dir
, mode
);
671 return PTR_ERR(inode
);
673 init_special_inode(inode
, mode
, rdev
);
674 return udf_add_nondir(dentry
, inode
);
677 static int udf_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
680 struct udf_fileident_bh fibh
;
681 struct fileIdentDesc cfi
, *fi
;
683 struct udf_inode_info
*dinfo
= UDF_I(dir
);
684 struct udf_inode_info
*iinfo
;
686 inode
= udf_new_inode(dir
, S_IFDIR
| mode
);
688 return PTR_ERR(inode
);
690 iinfo
= UDF_I(inode
);
691 inode
->i_op
= &udf_dir_inode_operations
;
692 inode
->i_fop
= &udf_dir_operations
;
693 fi
= udf_add_entry(inode
, NULL
, &fibh
, &cfi
, &err
);
695 inode_dec_link_count(inode
);
696 discard_new_inode(inode
);
700 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
701 cfi
.icb
.extLocation
= cpu_to_lelb(dinfo
->i_location
);
702 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
703 cpu_to_le32(dinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
704 cfi
.fileCharacteristics
=
705 FID_FILE_CHAR_DIRECTORY
| FID_FILE_CHAR_PARENT
;
706 udf_write_fi(inode
, &cfi
, fi
, &fibh
, NULL
, NULL
);
708 mark_inode_dirty(inode
);
710 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
713 mark_inode_dirty(inode
);
714 discard_new_inode(inode
);
717 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
718 cfi
.icb
.extLocation
= cpu_to_lelb(iinfo
->i_location
);
719 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
720 cpu_to_le32(iinfo
->i_unique
& 0x00000000FFFFFFFFUL
);
721 cfi
.fileCharacteristics
|= FID_FILE_CHAR_DIRECTORY
;
722 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
724 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
725 mark_inode_dirty(dir
);
726 d_instantiate_new(dentry
, inode
);
727 if (fibh
.sbh
!= fibh
.ebh
)
736 static int empty_dir(struct inode
*dir
)
738 struct fileIdentDesc
*fi
, cfi
;
739 struct udf_fileident_bh fibh
;
741 loff_t size
= udf_ext0_offset(dir
) + dir
->i_size
;
743 struct kernel_lb_addr eloc
;
746 struct extent_position epos
= {};
747 struct udf_inode_info
*dinfo
= UDF_I(dir
);
749 f_pos
= udf_ext0_offset(dir
);
750 fibh
.soffset
= fibh
.eoffset
= f_pos
& (dir
->i_sb
->s_blocksize
- 1);
752 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
753 fibh
.sbh
= fibh
.ebh
= NULL
;
754 else if (inode_bmap(dir
, f_pos
>> dir
->i_sb
->s_blocksize_bits
,
755 &epos
, &eloc
, &elen
, &offset
) ==
756 (EXT_RECORDED_ALLOCATED
>> 30)) {
757 block
= udf_get_lb_pblock(dir
->i_sb
, &eloc
, offset
);
758 if ((++offset
<< dir
->i_sb
->s_blocksize_bits
) < elen
) {
759 if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_SHORT
)
760 epos
.offset
-= sizeof(struct short_ad
);
761 else if (dinfo
->i_alloc_type
== ICBTAG_FLAG_AD_LONG
)
762 epos
.offset
-= sizeof(struct long_ad
);
766 fibh
.sbh
= fibh
.ebh
= udf_tread(dir
->i_sb
, block
);
776 while (f_pos
< size
) {
777 fi
= udf_fileident_read(dir
, &f_pos
, &fibh
, &cfi
, &epos
, &eloc
,
780 if (fibh
.sbh
!= fibh
.ebh
)
787 if (cfi
.lengthFileIdent
&&
788 (cfi
.fileCharacteristics
& FID_FILE_CHAR_DELETED
) == 0) {
789 if (fibh
.sbh
!= fibh
.ebh
)
797 if (fibh
.sbh
!= fibh
.ebh
)
805 static int udf_rmdir(struct inode
*dir
, struct dentry
*dentry
)
808 struct inode
*inode
= d_inode(dentry
);
809 struct udf_fileident_bh fibh
;
810 struct fileIdentDesc
*fi
, cfi
;
811 struct kernel_lb_addr tloc
;
814 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
815 if (IS_ERR_OR_NULL(fi
)) {
817 retval
= PTR_ERR(fi
);
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_warn(inode
->i_sb
, "empty directory has nlink != 2 (%u)\n",
836 inode_dec_link_count(dir
);
837 inode
->i_ctime
= dir
->i_ctime
= dir
->i_mtime
=
839 mark_inode_dirty(dir
);
842 if (fibh
.sbh
!= fibh
.ebh
)
850 static int udf_unlink(struct inode
*dir
, struct dentry
*dentry
)
853 struct inode
*inode
= d_inode(dentry
);
854 struct udf_fileident_bh fibh
;
855 struct fileIdentDesc
*fi
;
856 struct fileIdentDesc cfi
;
857 struct kernel_lb_addr tloc
;
860 fi
= udf_find_entry(dir
, &dentry
->d_name
, &fibh
, &cfi
);
862 if (IS_ERR_OR_NULL(fi
)) {
864 retval
= PTR_ERR(fi
);
869 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
870 if (udf_get_lb_pblock(dir
->i_sb
, &tloc
, 0) != inode
->i_ino
)
873 if (!inode
->i_nlink
) {
874 udf_debug("Deleting nonexistent file (%lu), %u\n",
875 inode
->i_ino
, inode
->i_nlink
);
878 retval
= udf_delete_entry(dir
, fi
, &fibh
, &cfi
);
881 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
882 mark_inode_dirty(dir
);
883 inode_dec_link_count(inode
);
884 inode
->i_ctime
= dir
->i_ctime
;
888 if (fibh
.sbh
!= fibh
.ebh
)
896 static int udf_symlink(struct inode
*dir
, struct dentry
*dentry
,
899 struct inode
*inode
= udf_new_inode(dir
, S_IFLNK
| 0777);
900 struct pathComponent
*pc
;
901 const char *compstart
;
902 struct extent_position epos
= {};
903 int eoffset
, elen
= 0;
907 unsigned char *name
= NULL
;
909 struct udf_inode_info
*iinfo
;
910 struct super_block
*sb
= dir
->i_sb
;
913 return PTR_ERR(inode
);
915 iinfo
= UDF_I(inode
);
916 down_write(&iinfo
->i_data_sem
);
917 name
= kmalloc(UDF_NAME_LEN_CS0
, GFP_NOFS
);
923 inode
->i_data
.a_ops
= &udf_symlink_aops
;
924 inode
->i_op
= &udf_symlink_inode_operations
;
925 inode_nohighmem(inode
);
927 if (iinfo
->i_alloc_type
!= ICBTAG_FLAG_AD_IN_ICB
) {
928 struct kernel_lb_addr eloc
;
931 block
= udf_new_block(sb
, inode
,
932 iinfo
->i_location
.partitionReferenceNum
,
933 iinfo
->i_location
.logicalBlockNum
, &err
);
936 epos
.block
= iinfo
->i_location
;
937 epos
.offset
= udf_file_entry_alloc_offset(inode
);
939 eloc
.logicalBlockNum
= block
;
940 eloc
.partitionReferenceNum
=
941 iinfo
->i_location
.partitionReferenceNum
;
942 bsize
= sb
->s_blocksize
;
943 iinfo
->i_lenExtents
= bsize
;
944 udf_add_aext(inode
, &epos
, &eloc
, bsize
, 0);
947 block
= udf_get_pblock(sb
, block
,
948 iinfo
->i_location
.partitionReferenceNum
,
950 epos
.bh
= udf_tgetblk(sb
, block
);
951 lock_buffer(epos
.bh
);
952 memset(epos
.bh
->b_data
, 0x00, bsize
);
953 set_buffer_uptodate(epos
.bh
);
954 unlock_buffer(epos
.bh
);
955 mark_buffer_dirty_inode(epos
.bh
, inode
);
956 ea
= epos
.bh
->b_data
+ udf_ext0_offset(inode
);
958 ea
= iinfo
->i_ext
.i_data
+ iinfo
->i_lenEAttr
;
960 eoffset
= sb
->s_blocksize
- udf_ext0_offset(inode
);
961 pc
= (struct pathComponent
*)ea
;
963 if (*symname
== '/') {
966 } while (*symname
== '/');
968 pc
->componentType
= 1;
969 pc
->lengthComponentIdent
= 0;
970 pc
->componentFileVersionNum
= 0;
971 elen
+= sizeof(struct pathComponent
);
977 if (elen
+ sizeof(struct pathComponent
) > eoffset
)
980 pc
= (struct pathComponent
*)(ea
+ elen
);
986 } while (*symname
&& *symname
!= '/');
988 pc
->componentType
= 5;
989 pc
->lengthComponentIdent
= 0;
990 pc
->componentFileVersionNum
= 0;
991 if (compstart
[0] == '.') {
992 if ((symname
- compstart
) == 1)
993 pc
->componentType
= 4;
994 else if ((symname
- compstart
) == 2 &&
996 pc
->componentType
= 3;
999 if (pc
->componentType
== 5) {
1000 namelen
= udf_put_filename(sb
, compstart
,
1001 symname
- compstart
,
1002 name
, UDF_NAME_LEN_CS0
);
1006 if (elen
+ sizeof(struct pathComponent
) + namelen
>
1010 pc
->lengthComponentIdent
= namelen
;
1012 memcpy(pc
->componentIdent
, name
, namelen
);
1015 elen
+= sizeof(struct pathComponent
) + pc
->lengthComponentIdent
;
1020 } while (*symname
== '/');
1025 inode
->i_size
= elen
;
1026 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1027 iinfo
->i_lenAlloc
= inode
->i_size
;
1029 udf_truncate_tail_extent(inode
);
1030 mark_inode_dirty(inode
);
1031 up_write(&iinfo
->i_data_sem
);
1033 err
= udf_add_nondir(dentry
, inode
);
1039 up_write(&iinfo
->i_data_sem
);
1040 inode_dec_link_count(inode
);
1041 discard_new_inode(inode
);
1045 static int udf_link(struct dentry
*old_dentry
, struct inode
*dir
,
1046 struct dentry
*dentry
)
1048 struct inode
*inode
= d_inode(old_dentry
);
1049 struct udf_fileident_bh fibh
;
1050 struct fileIdentDesc cfi
, *fi
;
1053 fi
= udf_add_entry(dir
, dentry
, &fibh
, &cfi
, &err
);
1057 cfi
.icb
.extLength
= cpu_to_le32(inode
->i_sb
->s_blocksize
);
1058 cfi
.icb
.extLocation
= cpu_to_lelb(UDF_I(inode
)->i_location
);
1059 if (UDF_SB(inode
->i_sb
)->s_lvid_bh
) {
1060 *(__le32
*)((struct allocDescImpUse
*)cfi
.icb
.impUse
)->impUse
=
1061 cpu_to_le32(lvid_get_unique_id(inode
->i_sb
));
1063 udf_write_fi(dir
, &cfi
, fi
, &fibh
, NULL
, NULL
);
1064 if (UDF_I(dir
)->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1065 mark_inode_dirty(dir
);
1067 if (fibh
.sbh
!= fibh
.ebh
)
1071 inode
->i_ctime
= current_time(inode
);
1072 mark_inode_dirty(inode
);
1073 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
1074 mark_inode_dirty(dir
);
1076 d_instantiate(dentry
, inode
);
1081 /* Anybody can rename anything with this: the permission checks are left to the
1082 * higher-level routines.
1084 static int udf_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1085 struct inode
*new_dir
, struct dentry
*new_dentry
,
1088 struct inode
*old_inode
= d_inode(old_dentry
);
1089 struct inode
*new_inode
= d_inode(new_dentry
);
1090 struct udf_fileident_bh ofibh
, nfibh
;
1091 struct fileIdentDesc
*ofi
= NULL
, *nfi
= NULL
, *dir_fi
= NULL
;
1092 struct fileIdentDesc ocfi
, ncfi
;
1093 struct buffer_head
*dir_bh
= NULL
;
1094 int retval
= -ENOENT
;
1095 struct kernel_lb_addr tloc
;
1096 struct udf_inode_info
*old_iinfo
= UDF_I(old_inode
);
1098 if (flags
& ~RENAME_NOREPLACE
)
1101 ofi
= udf_find_entry(old_dir
, &old_dentry
->d_name
, &ofibh
, &ocfi
);
1103 retval
= PTR_ERR(ofi
);
1107 if (ofibh
.sbh
!= ofibh
.ebh
)
1111 tloc
= lelb_to_cpu(ocfi
.icb
.extLocation
);
1112 if (!ofi
|| udf_get_lb_pblock(old_dir
->i_sb
, &tloc
, 0)
1113 != old_inode
->i_ino
)
1116 nfi
= udf_find_entry(new_dir
, &new_dentry
->d_name
, &nfibh
, &ncfi
);
1118 retval
= PTR_ERR(nfi
);
1121 if (nfi
&& !new_inode
) {
1122 if (nfibh
.sbh
!= nfibh
.ebh
)
1127 if (S_ISDIR(old_inode
->i_mode
)) {
1128 int offset
= udf_ext0_offset(old_inode
);
1131 retval
= -ENOTEMPTY
;
1132 if (!empty_dir(new_inode
))
1136 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
1137 dir_fi
= udf_get_fileident(
1138 old_iinfo
->i_ext
.i_data
-
1140 sizeof(struct extendedFileEntry
) :
1141 sizeof(struct fileEntry
)),
1142 old_inode
->i_sb
->s_blocksize
, &offset
);
1144 dir_bh
= udf_bread(old_inode
, 0, 0, &retval
);
1147 dir_fi
= udf_get_fileident(dir_bh
->b_data
,
1148 old_inode
->i_sb
->s_blocksize
, &offset
);
1152 tloc
= lelb_to_cpu(dir_fi
->icb
.extLocation
);
1153 if (udf_get_lb_pblock(old_inode
->i_sb
, &tloc
, 0) !=
1158 nfi
= udf_add_entry(new_dir
, new_dentry
, &nfibh
, &ncfi
,
1165 * Like most other Unix systems, set the ctime for inodes on a
1168 old_inode
->i_ctime
= current_time(old_inode
);
1169 mark_inode_dirty(old_inode
);
1174 ncfi
.fileVersionNum
= ocfi
.fileVersionNum
;
1175 ncfi
.fileCharacteristics
= ocfi
.fileCharacteristics
;
1176 memcpy(&(ncfi
.icb
), &(ocfi
.icb
), sizeof(ocfi
.icb
));
1177 udf_write_fi(new_dir
, &ncfi
, nfi
, &nfibh
, NULL
, NULL
);
1179 /* The old fid may have moved - find it again */
1180 ofi
= udf_find_entry(old_dir
, &old_dentry
->d_name
, &ofibh
, &ocfi
);
1181 udf_delete_entry(old_dir
, ofi
, &ofibh
, &ocfi
);
1184 new_inode
->i_ctime
= current_time(new_inode
);
1185 inode_dec_link_count(new_inode
);
1187 old_dir
->i_ctime
= old_dir
->i_mtime
= current_time(old_dir
);
1188 new_dir
->i_ctime
= new_dir
->i_mtime
= current_time(new_dir
);
1189 mark_inode_dirty(old_dir
);
1190 mark_inode_dirty(new_dir
);
1193 dir_fi
->icb
.extLocation
= cpu_to_lelb(UDF_I(new_dir
)->i_location
);
1194 udf_update_tag((char *)dir_fi
, udf_dir_entry_len(dir_fi
));
1195 if (old_iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
)
1196 mark_inode_dirty(old_inode
);
1198 mark_buffer_dirty_inode(dir_bh
, old_inode
);
1200 inode_dec_link_count(old_dir
);
1202 inode_dec_link_count(new_inode
);
1205 mark_inode_dirty(new_dir
);
1210 if (ofibh
.sbh
!= ofibh
.ebh
)
1220 if (nfibh
.sbh
!= nfibh
.ebh
)
1228 static struct dentry
*udf_get_parent(struct dentry
*child
)
1230 struct kernel_lb_addr tloc
;
1231 struct inode
*inode
= NULL
;
1232 struct qstr dotdot
= QSTR_INIT("..", 2);
1233 struct fileIdentDesc cfi
;
1234 struct udf_fileident_bh fibh
;
1236 if (!udf_find_entry(d_inode(child
), &dotdot
, &fibh
, &cfi
))
1237 return ERR_PTR(-EACCES
);
1239 if (fibh
.sbh
!= fibh
.ebh
)
1243 tloc
= lelb_to_cpu(cfi
.icb
.extLocation
);
1244 inode
= udf_iget(child
->d_sb
, &tloc
);
1246 return ERR_CAST(inode
);
1248 return d_obtain_alias(inode
);
1252 static struct dentry
*udf_nfs_get_inode(struct super_block
*sb
, u32 block
,
1253 u16 partref
, __u32 generation
)
1255 struct inode
*inode
;
1256 struct kernel_lb_addr loc
;
1259 return ERR_PTR(-ESTALE
);
1261 loc
.logicalBlockNum
= block
;
1262 loc
.partitionReferenceNum
= partref
;
1263 inode
= udf_iget(sb
, &loc
);
1266 return ERR_CAST(inode
);
1268 if (generation
&& inode
->i_generation
!= generation
) {
1270 return ERR_PTR(-ESTALE
);
1272 return d_obtain_alias(inode
);
1275 static struct dentry
*udf_fh_to_dentry(struct super_block
*sb
,
1276 struct fid
*fid
, int fh_len
, int fh_type
)
1279 (fh_type
!= FILEID_UDF_WITH_PARENT
&&
1280 fh_type
!= FILEID_UDF_WITHOUT_PARENT
))
1283 return udf_nfs_get_inode(sb
, fid
->udf
.block
, fid
->udf
.partref
,
1284 fid
->udf
.generation
);
1287 static struct dentry
*udf_fh_to_parent(struct super_block
*sb
,
1288 struct fid
*fid
, int fh_len
, int fh_type
)
1290 if (fh_len
< 5 || fh_type
!= FILEID_UDF_WITH_PARENT
)
1293 return udf_nfs_get_inode(sb
, fid
->udf
.parent_block
,
1294 fid
->udf
.parent_partref
,
1295 fid
->udf
.parent_generation
);
1297 static int udf_encode_fh(struct inode
*inode
, __u32
*fh
, int *lenp
,
1298 struct inode
*parent
)
1301 struct kernel_lb_addr location
= UDF_I(inode
)->i_location
;
1302 struct fid
*fid
= (struct fid
*)fh
;
1303 int type
= FILEID_UDF_WITHOUT_PARENT
;
1305 if (parent
&& (len
< 5)) {
1307 return FILEID_INVALID
;
1308 } else if (len
< 3) {
1310 return FILEID_INVALID
;
1314 fid
->udf
.block
= location
.logicalBlockNum
;
1315 fid
->udf
.partref
= location
.partitionReferenceNum
;
1316 fid
->udf
.parent_partref
= 0;
1317 fid
->udf
.generation
= inode
->i_generation
;
1320 location
= UDF_I(parent
)->i_location
;
1321 fid
->udf
.parent_block
= location
.logicalBlockNum
;
1322 fid
->udf
.parent_partref
= location
.partitionReferenceNum
;
1323 fid
->udf
.parent_generation
= inode
->i_generation
;
1325 type
= FILEID_UDF_WITH_PARENT
;
1331 const struct export_operations udf_export_ops
= {
1332 .encode_fh
= udf_encode_fh
,
1333 .fh_to_dentry
= udf_fh_to_dentry
,
1334 .fh_to_parent
= udf_fh_to_parent
,
1335 .get_parent
= udf_get_parent
,
1338 const struct inode_operations udf_dir_inode_operations
= {
1339 .lookup
= udf_lookup
,
1340 .create
= udf_create
,
1342 .unlink
= udf_unlink
,
1343 .symlink
= udf_symlink
,
1347 .rename
= udf_rename
,
1348 .tmpfile
= udf_tmpfile
,