Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm
[linux-2.6] / fs / udf / namei.c
1 /*
2  * namei.c
3  *
4  * PURPOSE
5  *      Inode name handling routines for the OSTA-UDF(tm) filesystem.
6  *
7  * COPYRIGHT
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.
12  *
13  *  (C) 1998-2004 Ben Fennema
14  *  (C) 1999-2000 Stelias Computing Inc
15  *
16  * HISTORY
17  *
18  *  12/12/98 blf  Created. Split out the lookup code from dir.c
19  *  04/19/99 blf  link, mknod, symlink support
20  */
21
22 #include "udfdecl.h"
23
24 #include "udf_i.h"
25 #include "udf_sb.h"
26 #include <linux/string.h>
27 #include <linux/errno.h>
28 #include <linux/mm.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>
34 #include <linux/crc-itu-t.h>
35
36 static inline int udf_match(int len1, const char *name1, int len2,
37                             const char *name2)
38 {
39         if (len1 != len2)
40                 return 0;
41
42         return !memcmp(name1, name2, len1);
43 }
44
45 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
46                  struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
47                  uint8_t *impuse, uint8_t *fileident)
48 {
49         uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
50         uint16_t crc;
51         int offset;
52         uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
53         uint8_t lfi = cfi->lengthFileIdent;
54         int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
55                 sizeof(struct fileIdentDesc);
56         int adinicb = 0;
57
58         if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
59                 adinicb = 1;
60
61         offset = fibh->soffset + sizeof(struct fileIdentDesc);
62
63         if (impuse) {
64                 if (adinicb || (offset + liu < 0)) {
65                         memcpy((uint8_t *)sfi->impUse, impuse, liu);
66                 } else if (offset >= 0) {
67                         memcpy(fibh->ebh->b_data + offset, impuse, liu);
68                 } else {
69                         memcpy((uint8_t *)sfi->impUse, impuse, -offset);
70                         memcpy(fibh->ebh->b_data, impuse - offset,
71                                 liu + offset);
72                 }
73         }
74
75         offset += liu;
76
77         if (fileident) {
78                 if (adinicb || (offset + lfi < 0)) {
79                         memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
80                 } else if (offset >= 0) {
81                         memcpy(fibh->ebh->b_data + offset, fileident, lfi);
82                 } else {
83                         memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
84                                 -offset);
85                         memcpy(fibh->ebh->b_data, fileident - offset,
86                                 lfi + offset);
87                 }
88         }
89
90         offset += lfi;
91
92         if (adinicb || (offset + padlen < 0)) {
93                 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
94         } else if (offset >= 0) {
95                 memset(fibh->ebh->b_data + offset, 0x00, padlen);
96         } else {
97                 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
98                 memset(fibh->ebh->b_data, 0x00, padlen + offset);
99         }
100
101         crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(tag),
102                       sizeof(struct fileIdentDesc) - sizeof(tag));
103
104         if (fibh->sbh == fibh->ebh) {
105                 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
106                               crclen + sizeof(tag) -
107                               sizeof(struct fileIdentDesc));
108         } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
109                 crc = crc_itu_t(crc, fibh->ebh->b_data +
110                                         sizeof(struct fileIdentDesc) +
111                                         fibh->soffset,
112                               crclen + sizeof(tag) -
113                                         sizeof(struct fileIdentDesc));
114         } else {
115                 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
116                               -fibh->soffset - sizeof(struct fileIdentDesc));
117                 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
118         }
119
120         cfi->descTag.descCRC = cpu_to_le16(crc);
121         cfi->descTag.descCRCLength = cpu_to_le16(crclen);
122         cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
123
124         if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
125                 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
126                         sizeof(struct fileIdentDesc));
127         } else {
128                 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
129                 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
130                        sizeof(struct fileIdentDesc) + fibh->soffset);
131         }
132
133         if (adinicb) {
134                 mark_inode_dirty(inode);
135         } else {
136                 if (fibh->sbh != fibh->ebh)
137                         mark_buffer_dirty_inode(fibh->ebh, inode);
138                 mark_buffer_dirty_inode(fibh->sbh, inode);
139         }
140         return 0;
141 }
142
143 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
144                                             struct dentry *dentry,
145                                             struct udf_fileident_bh *fibh,
146                                             struct fileIdentDesc *cfi)
147 {
148         struct fileIdentDesc *fi = NULL;
149         loff_t f_pos;
150         int block, flen;
151         char *fname = NULL;
152         char *nameptr;
153         uint8_t lfi;
154         uint16_t liu;
155         loff_t size;
156         kernel_lb_addr eloc;
157         uint32_t elen;
158         sector_t offset;
159         struct extent_position epos = {};
160         struct udf_inode_info *dinfo = UDF_I(dir);
161
162         size = udf_ext0_offset(dir) + dir->i_size;
163         f_pos = udf_ext0_offset(dir);
164
165         fibh->sbh = fibh->ebh = NULL;
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                 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
169                     &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
170                         goto out_err;
171                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
172                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
173                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
174                                 epos.offset -= sizeof(short_ad);
175                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
176                                 epos.offset -= sizeof(long_ad);
177                 } else
178                         offset = 0;
179
180                 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
181                 if (!fibh->sbh)
182                         goto out_err;
183         }
184
185         fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
186         if (!fname)
187                 goto out_err;
188
189         while (f_pos < size) {
190                 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
191                                         &elen, &offset);
192                 if (!fi)
193                         goto out_err;
194
195                 liu = le16_to_cpu(cfi->lengthOfImpUse);
196                 lfi = cfi->lengthFileIdent;
197
198                 if (fibh->sbh == fibh->ebh) {
199                         nameptr = fi->fileIdent + liu;
200                 } else {
201                         int poffset;    /* Unpaded ending offset */
202
203                         poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
204                                         liu + lfi;
205
206                         if (poffset >= lfi)
207                                 nameptr = (uint8_t *)(fibh->ebh->b_data +
208                                                       poffset - lfi);
209                         else {
210                                 nameptr = fname;
211                                 memcpy(nameptr, fi->fileIdent + liu,
212                                         lfi - poffset);
213                                 memcpy(nameptr + lfi - poffset,
214                                         fibh->ebh->b_data, poffset);
215                         }
216                 }
217
218                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
219                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
220                                 continue;
221                 }
222
223                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
224                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
225                                 continue;
226                 }
227
228                 if (!lfi)
229                         continue;
230
231                 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
232                 if (flen && udf_match(flen, fname, dentry->d_name.len,
233                                       dentry->d_name.name))
234                         goto out_ok;
235         }
236
237 out_err:
238         fi = NULL;
239         if (fibh->sbh != fibh->ebh)
240                 brelse(fibh->ebh);
241         brelse(fibh->sbh);
242 out_ok:
243         brelse(epos.bh);
244         kfree(fname);
245
246         return fi;
247 }
248
249 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
250                                  struct nameidata *nd)
251 {
252         struct inode *inode = NULL;
253         struct fileIdentDesc cfi;
254         struct udf_fileident_bh fibh;
255
256         if (dentry->d_name.len > UDF_NAME_LEN - 2)
257                 return ERR_PTR(-ENAMETOOLONG);
258
259         lock_kernel();
260 #ifdef UDF_RECOVERY
261         /* temporary shorthand for specifying files by inode number */
262         if (!strncmp(dentry->d_name.name, ".B=", 3)) {
263                 kernel_lb_addr lb = {
264                         .logicalBlockNum = 0,
265                         .partitionReferenceNum =
266                                 simple_strtoul(dentry->d_name.name + 3,
267                                                 NULL, 0),
268                 };
269                 inode = udf_iget(dir->i_sb, lb);
270                 if (!inode) {
271                         unlock_kernel();
272                         return ERR_PTR(-EACCES);
273                 }
274         } else
275 #endif /* UDF_RECOVERY */
276
277         if (udf_find_entry(dir, dentry, &fibh, &cfi)) {
278                 if (fibh.sbh != fibh.ebh)
279                         brelse(fibh.ebh);
280                 brelse(fibh.sbh);
281
282                 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
283                 if (!inode) {
284                         unlock_kernel();
285                         return ERR_PTR(-EACCES);
286                 }
287         }
288         unlock_kernel();
289         d_add(dentry, inode);
290
291         return NULL;
292 }
293
294 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
295                                            struct dentry *dentry,
296                                            struct udf_fileident_bh *fibh,
297                                            struct fileIdentDesc *cfi, int *err)
298 {
299         struct super_block *sb = dir->i_sb;
300         struct fileIdentDesc *fi = NULL;
301         char *name = NULL;
302         int namelen;
303         loff_t f_pos;
304         loff_t size = udf_ext0_offset(dir) + dir->i_size;
305         int nfidlen;
306         uint8_t lfi;
307         uint16_t liu;
308         int block;
309         kernel_lb_addr eloc;
310         uint32_t elen;
311         sector_t offset;
312         struct extent_position epos = {};
313         struct udf_inode_info *dinfo;
314
315         fibh->sbh = fibh->ebh = NULL;
316         name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
317         if (!name) {
318                 *err = -ENOMEM;
319                 goto out_err;
320         }
321
322         if (dentry) {
323                 if (!dentry->d_name.len) {
324                         *err = -EINVAL;
325                         goto out_err;
326                 }
327                 namelen = udf_put_filename(sb, dentry->d_name.name, name,
328                                                  dentry->d_name.len);
329                 if (!namelen) {
330                         *err = -ENAMETOOLONG;
331                         goto out_err;
332                 }
333         } else {
334                 namelen = 0;
335         }
336
337         nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
338
339         f_pos = udf_ext0_offset(dir);
340
341         fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
342         dinfo = UDF_I(dir);
343         if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
344                 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
345                     &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
346                         block = udf_get_lb_pblock(dir->i_sb,
347                                         dinfo->i_location, 0);
348                         fibh->soffset = fibh->eoffset = sb->s_blocksize;
349                         goto add;
350                 }
351                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
352                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
353                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
354                                 epos.offset -= sizeof(short_ad);
355                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
356                                 epos.offset -= sizeof(long_ad);
357                 } else
358                         offset = 0;
359
360                 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
361                 if (!fibh->sbh) {
362                         *err = -EIO;
363                         goto out_err;
364                 }
365
366                 block = dinfo->i_location.logicalBlockNum;
367         }
368
369         while (f_pos < size) {
370                 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
371                                         &elen, &offset);
372
373                 if (!fi) {
374                         *err = -EIO;
375                         goto out_err;
376                 }
377
378                 liu = le16_to_cpu(cfi->lengthOfImpUse);
379                 lfi = cfi->lengthFileIdent;
380
381                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
382                         if (((sizeof(struct fileIdentDesc) +
383                                         liu + lfi + 3) & ~3) == nfidlen) {
384                                 cfi->descTag.tagSerialNum = cpu_to_le16(1);
385                                 cfi->fileVersionNum = cpu_to_le16(1);
386                                 cfi->fileCharacteristics = 0;
387                                 cfi->lengthFileIdent = namelen;
388                                 cfi->lengthOfImpUse = cpu_to_le16(0);
389                                 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
390                                                   name))
391                                         goto out_ok;
392                                 else {
393                                         *err = -EIO;
394                                         goto out_err;
395                                 }
396                         }
397                 }
398         }
399
400 add:
401         if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
402                 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
403                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
404                         epos.offset -= sizeof(short_ad);
405                 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
406                         epos.offset -= sizeof(long_ad);
407                 udf_write_aext(dir, &epos, eloc, elen, 1);
408         }
409         f_pos += nfidlen;
410
411         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
412             sb->s_blocksize - fibh->eoffset < nfidlen) {
413                 brelse(epos.bh);
414                 epos.bh = NULL;
415                 fibh->soffset -= udf_ext0_offset(dir);
416                 fibh->eoffset -= udf_ext0_offset(dir);
417                 f_pos -= udf_ext0_offset(dir);
418                 if (fibh->sbh != fibh->ebh)
419                         brelse(fibh->ebh);
420                 brelse(fibh->sbh);
421                 fibh->sbh = fibh->ebh =
422                                 udf_expand_dir_adinicb(dir, &block, err);
423                 if (!fibh->sbh)
424                         goto out_err;
425                 epos.block = dinfo->i_location;
426                 epos.offset = udf_file_entry_alloc_offset(dir);
427                 /* Load extent udf_expand_dir_adinicb() has created */
428                 udf_current_aext(dir, &epos, &eloc, &elen, 1);
429         }
430
431         if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
432                 fibh->soffset = fibh->eoffset;
433                 fibh->eoffset += nfidlen;
434                 if (fibh->sbh != fibh->ebh) {
435                         brelse(fibh->sbh);
436                         fibh->sbh = fibh->ebh;
437                 }
438
439                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
440                         block = dinfo->i_location.logicalBlockNum;
441                         fi = (struct fileIdentDesc *)
442                                         (dinfo->i_ext.i_data +
443                                          fibh->soffset -
444                                          udf_ext0_offset(dir) +
445                                          dinfo->i_lenEAttr);
446                 } else {
447                         block = eloc.logicalBlockNum +
448                                         ((elen - 1) >>
449                                                 dir->i_sb->s_blocksize_bits);
450                         fi = (struct fileIdentDesc *)
451                                 (fibh->sbh->b_data + fibh->soffset);
452                 }
453         } else {
454                 fibh->soffset = fibh->eoffset - sb->s_blocksize;
455                 fibh->eoffset += nfidlen - sb->s_blocksize;
456                 if (fibh->sbh != fibh->ebh) {
457                         brelse(fibh->sbh);
458                         fibh->sbh = fibh->ebh;
459                 }
460
461                 block = eloc.logicalBlockNum + ((elen - 1) >>
462                                                 dir->i_sb->s_blocksize_bits);
463                 fibh->ebh = udf_bread(dir,
464                                 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
465                 if (!fibh->ebh)
466                         goto out_err;
467
468                 if (!fibh->soffset) {
469                         if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
470                             (EXT_RECORDED_ALLOCATED >> 30)) {
471                                 block = eloc.logicalBlockNum + ((elen - 1) >>
472                                         dir->i_sb->s_blocksize_bits);
473                         } else
474                                 block++;
475
476                         brelse(fibh->sbh);
477                         fibh->sbh = fibh->ebh;
478                         fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
479                 } else {
480                         fi = (struct fileIdentDesc *)
481                                 (fibh->sbh->b_data + sb->s_blocksize +
482                                         fibh->soffset);
483                 }
484         }
485
486         memset(cfi, 0, sizeof(struct fileIdentDesc));
487         if (UDF_SB(sb)->s_udfrev >= 0x0200)
488                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
489                             sizeof(tag));
490         else
491                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
492                             sizeof(tag));
493         cfi->fileVersionNum = cpu_to_le16(1);
494         cfi->lengthFileIdent = namelen;
495         cfi->lengthOfImpUse = cpu_to_le16(0);
496         if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
497                 dir->i_size += nfidlen;
498                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
499                         dinfo->i_lenAlloc += nfidlen;
500                 mark_inode_dirty(dir);
501                 goto out_ok;
502         } else {
503                 *err = -EIO;
504                 goto out_err;
505         }
506
507 out_err:
508         fi = NULL;
509         if (fibh->sbh != fibh->ebh)
510                 brelse(fibh->ebh);
511         brelse(fibh->sbh);
512 out_ok:
513         brelse(epos.bh);
514         kfree(name);
515         return fi;
516 }
517
518 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
519                             struct udf_fileident_bh *fibh,
520                             struct fileIdentDesc *cfi)
521 {
522         cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
523
524         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
525                 memset(&(cfi->icb), 0x00, sizeof(long_ad));
526
527         return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
528 }
529
530 static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
531                       struct nameidata *nd)
532 {
533         struct udf_fileident_bh fibh;
534         struct inode *inode;
535         struct fileIdentDesc cfi, *fi;
536         int err;
537         struct udf_inode_info *iinfo;
538
539         lock_kernel();
540         inode = udf_new_inode(dir, mode, &err);
541         if (!inode) {
542                 unlock_kernel();
543                 return err;
544         }
545
546         iinfo = UDF_I(inode);
547         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
548                 inode->i_data.a_ops = &udf_adinicb_aops;
549         else
550                 inode->i_data.a_ops = &udf_aops;
551         inode->i_op = &udf_file_inode_operations;
552         inode->i_fop = &udf_file_operations;
553         inode->i_mode = mode;
554         mark_inode_dirty(inode);
555
556         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
557         if (!fi) {
558                 inode->i_nlink--;
559                 mark_inode_dirty(inode);
560                 iput(inode);
561                 unlock_kernel();
562                 return err;
563         }
564         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
565         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
566         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
567                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
568         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
569         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
570                 mark_inode_dirty(dir);
571         if (fibh.sbh != fibh.ebh)
572                 brelse(fibh.ebh);
573         brelse(fibh.sbh);
574         unlock_kernel();
575         d_instantiate(dentry, inode);
576
577         return 0;
578 }
579
580 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
581                      dev_t rdev)
582 {
583         struct inode *inode;
584         struct udf_fileident_bh fibh;
585         struct fileIdentDesc cfi, *fi;
586         int err;
587         struct udf_inode_info *iinfo;
588
589         if (!old_valid_dev(rdev))
590                 return -EINVAL;
591
592         lock_kernel();
593         err = -EIO;
594         inode = udf_new_inode(dir, mode, &err);
595         if (!inode)
596                 goto out;
597
598         iinfo = UDF_I(inode);
599         inode->i_uid = current->fsuid;
600         init_special_inode(inode, mode, rdev);
601         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
602         if (!fi) {
603                 inode->i_nlink--;
604                 mark_inode_dirty(inode);
605                 iput(inode);
606                 unlock_kernel();
607                 return err;
608         }
609         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
610         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
611         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
612                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
613         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
614         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
615                 mark_inode_dirty(dir);
616         mark_inode_dirty(inode);
617
618         if (fibh.sbh != fibh.ebh)
619                 brelse(fibh.ebh);
620         brelse(fibh.sbh);
621         d_instantiate(dentry, inode);
622         err = 0;
623
624 out:
625         unlock_kernel();
626         return err;
627 }
628
629 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
630 {
631         struct inode *inode;
632         struct udf_fileident_bh fibh;
633         struct fileIdentDesc cfi, *fi;
634         int err;
635         struct udf_inode_info *dinfo = UDF_I(dir);
636         struct udf_inode_info *iinfo;
637
638         lock_kernel();
639         err = -EMLINK;
640         if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
641                 goto out;
642
643         err = -EIO;
644         inode = udf_new_inode(dir, S_IFDIR, &err);
645         if (!inode)
646                 goto out;
647
648         iinfo = UDF_I(inode);
649         inode->i_op = &udf_dir_inode_operations;
650         inode->i_fop = &udf_dir_operations;
651         fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
652         if (!fi) {
653                 inode->i_nlink--;
654                 mark_inode_dirty(inode);
655                 iput(inode);
656                 goto out;
657         }
658         inode->i_nlink = 2;
659         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
660         cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
661         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
662                 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
663         cfi.fileCharacteristics =
664                         FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
665         udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
666         brelse(fibh.sbh);
667         inode->i_mode = S_IFDIR | mode;
668         if (dir->i_mode & S_ISGID)
669                 inode->i_mode |= S_ISGID;
670         mark_inode_dirty(inode);
671
672         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
673         if (!fi) {
674                 inode->i_nlink = 0;
675                 mark_inode_dirty(inode);
676                 iput(inode);
677                 goto out;
678         }
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);
685         inc_nlink(dir);
686         mark_inode_dirty(dir);
687         d_instantiate(dentry, inode);
688         if (fibh.sbh != fibh.ebh)
689                 brelse(fibh.ebh);
690         brelse(fibh.sbh);
691         err = 0;
692
693 out:
694         unlock_kernel();
695         return err;
696 }
697
698 static int empty_dir(struct inode *dir)
699 {
700         struct fileIdentDesc *fi, cfi;
701         struct udf_fileident_bh fibh;
702         loff_t f_pos;
703         loff_t size = udf_ext0_offset(dir) + dir->i_size;
704         int block;
705         kernel_lb_addr eloc;
706         uint32_t elen;
707         sector_t offset;
708         struct extent_position epos = {};
709         struct udf_inode_info *dinfo = UDF_I(dir);
710
711         f_pos = udf_ext0_offset(dir);
712         fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
713
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(short_ad);
723                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
724                                 epos.offset -= sizeof(long_ad);
725                 } else
726                         offset = 0;
727
728                 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
729                 if (!fibh.sbh) {
730                         brelse(epos.bh);
731                         return 0;
732                 }
733         } else {
734                 brelse(epos.bh);
735                 return 0;
736         }
737
738         while (f_pos < size) {
739                 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
740                                         &elen, &offset);
741                 if (!fi) {
742                         if (fibh.sbh != fibh.ebh)
743                                 brelse(fibh.ebh);
744                         brelse(fibh.sbh);
745                         brelse(epos.bh);
746                         return 0;
747                 }
748
749                 if (cfi.lengthFileIdent &&
750                     (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
751                         if (fibh.sbh != fibh.ebh)
752                                 brelse(fibh.ebh);
753                         brelse(fibh.sbh);
754                         brelse(epos.bh);
755                         return 0;
756                 }
757         }
758
759         if (fibh.sbh != fibh.ebh)
760                 brelse(fibh.ebh);
761         brelse(fibh.sbh);
762         brelse(epos.bh);
763
764         return 1;
765 }
766
767 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
768 {
769         int retval;
770         struct inode *inode = dentry->d_inode;
771         struct udf_fileident_bh fibh;
772         struct fileIdentDesc *fi, cfi;
773         kernel_lb_addr tloc;
774
775         retval = -ENOENT;
776         lock_kernel();
777         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
778         if (!fi)
779                 goto out;
780
781         retval = -EIO;
782         tloc = lelb_to_cpu(cfi.icb.extLocation);
783         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
784                 goto end_rmdir;
785         retval = -ENOTEMPTY;
786         if (!empty_dir(inode))
787                 goto end_rmdir;
788         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
789         if (retval)
790                 goto end_rmdir;
791         if (inode->i_nlink != 2)
792                 udf_warning(inode->i_sb, "udf_rmdir",
793                             "empty directory has nlink != 2 (%d)",
794                             inode->i_nlink);
795         clear_nlink(inode);
796         inode->i_size = 0;
797         inode_dec_link_count(dir);
798         inode->i_ctime = dir->i_ctime = dir->i_mtime =
799                                                 current_fs_time(dir->i_sb);
800         mark_inode_dirty(dir);
801
802 end_rmdir:
803         if (fibh.sbh != fibh.ebh)
804                 brelse(fibh.ebh);
805         brelse(fibh.sbh);
806
807 out:
808         unlock_kernel();
809         return retval;
810 }
811
812 static int udf_unlink(struct inode *dir, struct dentry *dentry)
813 {
814         int retval;
815         struct inode *inode = dentry->d_inode;
816         struct udf_fileident_bh fibh;
817         struct fileIdentDesc *fi;
818         struct fileIdentDesc cfi;
819         kernel_lb_addr tloc;
820
821         retval = -ENOENT;
822         lock_kernel();
823         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
824         if (!fi)
825                 goto out;
826
827         retval = -EIO;
828         tloc = lelb_to_cpu(cfi.icb.extLocation);
829         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
830                 goto end_unlink;
831
832         if (!inode->i_nlink) {
833                 udf_debug("Deleting nonexistent file (%lu), %d\n",
834                           inode->i_ino, inode->i_nlink);
835                 inode->i_nlink = 1;
836         }
837         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
838         if (retval)
839                 goto end_unlink;
840         dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
841         mark_inode_dirty(dir);
842         inode_dec_link_count(inode);
843         inode->i_ctime = dir->i_ctime;
844         retval = 0;
845
846 end_unlink:
847         if (fibh.sbh != fibh.ebh)
848                 brelse(fibh.ebh);
849         brelse(fibh.sbh);
850
851 out:
852         unlock_kernel();
853         return retval;
854 }
855
856 static int udf_symlink(struct inode *dir, struct dentry *dentry,
857                        const char *symname)
858 {
859         struct inode *inode;
860         struct pathComponent *pc;
861         char *compstart;
862         struct udf_fileident_bh fibh;
863         struct extent_position epos = {};
864         int eoffset, elen = 0;
865         struct fileIdentDesc *fi;
866         struct fileIdentDesc cfi;
867         char *ea;
868         int err;
869         int block;
870         char *name = NULL;
871         int namelen;
872         struct buffer_head *bh;
873         struct udf_inode_info *iinfo;
874
875         lock_kernel();
876         inode = udf_new_inode(dir, S_IFLNK, &err);
877         if (!inode)
878                 goto out;
879
880         name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
881         if (!name) {
882                 err = -ENOMEM;
883                 goto out_no_entry;
884         }
885
886         iinfo = UDF_I(inode);
887         inode->i_mode = S_IFLNK | S_IRWXUGO;
888         inode->i_data.a_ops = &udf_symlink_aops;
889         inode->i_op = &page_symlink_inode_operations;
890
891         if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
892                 kernel_lb_addr eloc;
893                 uint32_t elen;
894
895                 block = udf_new_block(inode->i_sb, inode,
896                                 iinfo->i_location.partitionReferenceNum,
897                                 iinfo->i_location.logicalBlockNum, &err);
898                 if (!block)
899                         goto out_no_entry;
900                 epos.block = iinfo->i_location;
901                 epos.offset = udf_file_entry_alloc_offset(inode);
902                 epos.bh = NULL;
903                 eloc.logicalBlockNum = block;
904                 eloc.partitionReferenceNum =
905                                 iinfo->i_location.partitionReferenceNum;
906                 elen = inode->i_sb->s_blocksize;
907                 iinfo->i_lenExtents = elen;
908                 udf_add_aext(inode, &epos, eloc, elen, 0);
909                 brelse(epos.bh);
910
911                 block = udf_get_pblock(inode->i_sb, block,
912                                 iinfo->i_location.partitionReferenceNum,
913                                 0);
914                 epos.bh = udf_tread(inode->i_sb, block);
915                 lock_buffer(epos.bh);
916                 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
917                 set_buffer_uptodate(epos.bh);
918                 unlock_buffer(epos.bh);
919                 mark_buffer_dirty_inode(epos.bh, inode);
920                 ea = epos.bh->b_data + udf_ext0_offset(inode);
921         } else
922                 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
923
924         eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
925         pc = (struct pathComponent *)ea;
926
927         if (*symname == '/') {
928                 do {
929                         symname++;
930                 } while (*symname == '/');
931
932                 pc->componentType = 1;
933                 pc->lengthComponentIdent = 0;
934                 pc->componentFileVersionNum = 0;
935                 pc += sizeof(struct pathComponent);
936                 elen += sizeof(struct pathComponent);
937         }
938
939         err = -ENAMETOOLONG;
940
941         while (*symname) {
942                 if (elen + sizeof(struct pathComponent) > eoffset)
943                         goto out_no_entry;
944
945                 pc = (struct pathComponent *)(ea + elen);
946
947                 compstart = (char *)symname;
948
949                 do {
950                         symname++;
951                 } while (*symname && *symname != '/');
952
953                 pc->componentType = 5;
954                 pc->lengthComponentIdent = 0;
955                 pc->componentFileVersionNum = 0;
956                 if (compstart[0] == '.') {
957                         if ((symname - compstart) == 1)
958                                 pc->componentType = 4;
959                         else if ((symname - compstart) == 2 &&
960                                         compstart[1] == '.')
961                                 pc->componentType = 3;
962                 }
963
964                 if (pc->componentType == 5) {
965                         namelen = udf_put_filename(inode->i_sb, compstart, name,
966                                                    symname - compstart);
967                         if (!namelen)
968                                 goto out_no_entry;
969
970                         if (elen + sizeof(struct pathComponent) + namelen >
971                                         eoffset)
972                                 goto out_no_entry;
973                         else
974                                 pc->lengthComponentIdent = namelen;
975
976                         memcpy(pc->componentIdent, name, namelen);
977                 }
978
979                 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
980
981                 if (*symname) {
982                         do {
983                                 symname++;
984                         } while (*symname == '/');
985                 }
986         }
987
988         brelse(epos.bh);
989         inode->i_size = elen;
990         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
991                 iinfo->i_lenAlloc = inode->i_size;
992         mark_inode_dirty(inode);
993
994         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
995         if (!fi)
996                 goto out_no_entry;
997         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
998         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
999         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1000         if (bh) {
1001                 struct logicalVolIntegrityDesc *lvid =
1002                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1003                 struct logicalVolHeaderDesc *lvhd;
1004                 uint64_t uniqueID;
1005                 lvhd = (struct logicalVolHeaderDesc *)
1006                                 lvid->logicalVolContentsUse;
1007                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1008                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1009                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1010                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1011                         uniqueID += 16;
1012                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1013                 mark_buffer_dirty(bh);
1014         }
1015         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1016         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1017                 mark_inode_dirty(dir);
1018         if (fibh.sbh != fibh.ebh)
1019                 brelse(fibh.ebh);
1020         brelse(fibh.sbh);
1021         d_instantiate(dentry, inode);
1022         err = 0;
1023
1024 out:
1025         kfree(name);
1026         unlock_kernel();
1027         return err;
1028
1029 out_no_entry:
1030         inode_dec_link_count(inode);
1031         iput(inode);
1032         goto out;
1033 }
1034
1035 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1036                     struct dentry *dentry)
1037 {
1038         struct inode *inode = old_dentry->d_inode;
1039         struct udf_fileident_bh fibh;
1040         struct fileIdentDesc cfi, *fi;
1041         int err;
1042         struct buffer_head *bh;
1043
1044         lock_kernel();
1045         if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
1046                 unlock_kernel();
1047                 return -EMLINK;
1048         }
1049
1050         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1051         if (!fi) {
1052                 unlock_kernel();
1053                 return err;
1054         }
1055         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1056         cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1057         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1058         if (bh) {
1059                 struct logicalVolIntegrityDesc *lvid =
1060                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1061                 struct logicalVolHeaderDesc *lvhd;
1062                 uint64_t uniqueID;
1063                 lvhd = (struct logicalVolHeaderDesc *)
1064                                 (lvid->logicalVolContentsUse);
1065                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1066                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1067                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1068                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1069                         uniqueID += 16;
1070                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1071                 mark_buffer_dirty(bh);
1072         }
1073         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1074         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1075                 mark_inode_dirty(dir);
1076
1077         if (fibh.sbh != fibh.ebh)
1078                 brelse(fibh.ebh);
1079         brelse(fibh.sbh);
1080         inc_nlink(inode);
1081         inode->i_ctime = current_fs_time(inode->i_sb);
1082         mark_inode_dirty(inode);
1083         atomic_inc(&inode->i_count);
1084         d_instantiate(dentry, inode);
1085         unlock_kernel();
1086
1087         return 0;
1088 }
1089
1090 /* Anybody can rename anything with this: the permission checks are left to the
1091  * higher-level routines.
1092  */
1093 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1094                       struct inode *new_dir, struct dentry *new_dentry)
1095 {
1096         struct inode *old_inode = old_dentry->d_inode;
1097         struct inode *new_inode = new_dentry->d_inode;
1098         struct udf_fileident_bh ofibh, nfibh;
1099         struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1100         struct fileIdentDesc ocfi, ncfi;
1101         struct buffer_head *dir_bh = NULL;
1102         int retval = -ENOENT;
1103         kernel_lb_addr tloc;
1104         struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1105
1106         lock_kernel();
1107         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1108         if (ofi) {
1109                 if (ofibh.sbh != ofibh.ebh)
1110                         brelse(ofibh.ebh);
1111                 brelse(ofibh.sbh);
1112         }
1113         tloc = lelb_to_cpu(ocfi.icb.extLocation);
1114         if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1115             != old_inode->i_ino)
1116                 goto end_rename;
1117
1118         nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1119         if (nfi) {
1120                 if (!new_inode) {
1121                         if (nfibh.sbh != nfibh.ebh)
1122                                 brelse(nfibh.ebh);
1123                         brelse(nfibh.sbh);
1124                         nfi = NULL;
1125                 }
1126         }
1127         if (S_ISDIR(old_inode->i_mode)) {
1128                 int offset = udf_ext0_offset(old_inode);
1129
1130                 if (new_inode) {
1131                         retval = -ENOTEMPTY;
1132                         if (!empty_dir(new_inode))
1133                                 goto end_rename;
1134                 }
1135                 retval = -EIO;
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 -
1139                                           (old_iinfo->i_efe ?
1140                                            sizeof(struct extendedFileEntry) :
1141                                            sizeof(struct fileEntry)),
1142                                         old_inode->i_sb->s_blocksize, &offset);
1143                 } else {
1144                         dir_bh = udf_bread(old_inode, 0, 0, &retval);
1145                         if (!dir_bh)
1146                                 goto end_rename;
1147                         dir_fi = udf_get_fileident(dir_bh->b_data,
1148                                         old_inode->i_sb->s_blocksize, &offset);
1149                 }
1150                 if (!dir_fi)
1151                         goto end_rename;
1152                 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1153                 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) !=
1154                                 old_dir->i_ino)
1155                         goto end_rename;
1156
1157                 retval = -EMLINK;
1158                 if (!new_inode &&
1159                         new_dir->i_nlink >=
1160                                 (256 << sizeof(new_dir->i_nlink)) - 1)
1161                         goto end_rename;
1162         }
1163         if (!nfi) {
1164                 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1165                                     &retval);
1166                 if (!nfi)
1167                         goto end_rename;
1168         }
1169
1170         /*
1171          * Like most other Unix systems, set the ctime for inodes on a
1172          * rename.
1173          */
1174         old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1175         mark_inode_dirty(old_inode);
1176
1177         /*
1178          * ok, that's it
1179          */
1180         ncfi.fileVersionNum = ocfi.fileVersionNum;
1181         ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1182         memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1183         udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1184
1185         /* The old fid may have moved - find it again */
1186         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1187         udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1188
1189         if (new_inode) {
1190                 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1191                 inode_dec_link_count(new_inode);
1192         }
1193         old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1194         mark_inode_dirty(old_dir);
1195
1196         if (dir_fi) {
1197                 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1198                 udf_update_tag((char *)dir_fi,
1199                                 (sizeof(struct fileIdentDesc) +
1200                                 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1201                 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1202                         mark_inode_dirty(old_inode);
1203                 else
1204                         mark_buffer_dirty_inode(dir_bh, old_inode);
1205
1206                 inode_dec_link_count(old_dir);
1207                 if (new_inode)
1208                         inode_dec_link_count(new_inode);
1209                 else {
1210                         inc_nlink(new_dir);
1211                         mark_inode_dirty(new_dir);
1212                 }
1213         }
1214
1215         if (ofi) {
1216                 if (ofibh.sbh != ofibh.ebh)
1217                         brelse(ofibh.ebh);
1218                 brelse(ofibh.sbh);
1219         }
1220
1221         retval = 0;
1222
1223 end_rename:
1224         brelse(dir_bh);
1225         if (nfi) {
1226                 if (nfibh.sbh != nfibh.ebh)
1227                         brelse(nfibh.ebh);
1228                 brelse(nfibh.sbh);
1229         }
1230         unlock_kernel();
1231
1232         return retval;
1233 }
1234
1235 const struct inode_operations udf_dir_inode_operations = {
1236         .lookup                         = udf_lookup,
1237         .create                         = udf_create,
1238         .link                           = udf_link,
1239         .unlink                         = udf_unlink,
1240         .symlink                        = udf_symlink,
1241         .mkdir                          = udf_mkdir,
1242         .rmdir                          = udf_rmdir,
1243         .mknod                          = udf_mknod,
1244         .rename                         = udf_rename,
1245 };