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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
35 static inline int udf_match(int len1, const char *name1, int len2,
36 const char *name2)
37 {
38 if (len1 != len2)
39 return 0;
40
41 return !memcmp(name1, name2, len1);
42 }
43
44 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
45 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
46 uint8_t *impuse, uint8_t *fileident)
47 {
48 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
49 uint16_t crc;
50 int offset;
51 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
52 uint8_t lfi = cfi->lengthFileIdent;
53 int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
54 sizeof(struct fileIdentDesc);
55 int adinicb = 0;
56
57 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
58 adinicb = 1;
59
60 offset = fibh->soffset + sizeof(struct fileIdentDesc);
61
62 if (impuse) {
63 if (adinicb || (offset + liu < 0)) {
64 memcpy((uint8_t *)sfi->impUse, impuse, liu);
65 } else if (offset >= 0) {
66 memcpy(fibh->ebh->b_data + offset, impuse, liu);
67 } else {
68 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
69 memcpy(fibh->ebh->b_data, impuse - offset,
70 liu + offset);
71 }
72 }
73
74 offset += liu;
75
76 if (fileident) {
77 if (adinicb || (offset + lfi < 0)) {
78 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
79 } else if (offset >= 0) {
80 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
81 } else {
82 memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
83 -offset);
84 memcpy(fibh->ebh->b_data, fileident - offset,
85 lfi + offset);
86 }
87 }
88
89 offset += lfi;
90
91 if (adinicb || (offset + padlen < 0)) {
92 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
93 } else if (offset >= 0) {
94 memset(fibh->ebh->b_data + offset, 0x00, padlen);
95 } else {
96 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
97 memset(fibh->ebh->b_data, 0x00, padlen + offset);
98 }
99
100 crc = udf_crc((uint8_t *)cfi + sizeof(tag),
101 sizeof(struct fileIdentDesc) - sizeof(tag), 0);
102
103 if (fibh->sbh == fibh->ebh) {
104 crc = udf_crc((uint8_t *)sfi->impUse,
105 crclen + sizeof(tag) -
106 sizeof(struct fileIdentDesc), crc);
107 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
108 crc = udf_crc(fibh->ebh->b_data +
109 sizeof(struct fileIdentDesc) +
110 fibh->soffset,
111 crclen + sizeof(tag) -
112 sizeof(struct fileIdentDesc),
113 crc);
114 } else {
115 crc = udf_crc((uint8_t *)sfi->impUse,
116 -fibh->soffset - sizeof(struct fileIdentDesc),
117 crc);
118 crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
119 }
120
121 cfi->descTag.descCRC = cpu_to_le16(crc);
122 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
123 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
124
125 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
126 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
127 sizeof(struct fileIdentDesc));
128 } else {
129 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
130 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
131 sizeof(struct fileIdentDesc) + fibh->soffset);
132 }
133
134 if (adinicb) {
135 mark_inode_dirty(inode);
136 } else {
137 if (fibh->sbh != fibh->ebh)
138 mark_buffer_dirty_inode(fibh->ebh, inode);
139 mark_buffer_dirty_inode(fibh->sbh, inode);
140 }
141 return 0;
142 }
143
144 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
145 struct dentry *dentry,
146 struct udf_fileident_bh *fibh,
147 struct fileIdentDesc *cfi)
148 {
149 struct fileIdentDesc *fi = NULL;
150 loff_t f_pos;
151 int block, flen;
152 char fname[UDF_NAME_LEN];
153 char *nameptr;
154 uint8_t lfi;
155 uint16_t liu;
156 loff_t size;
157 kernel_lb_addr eloc;
158 uint32_t elen;
159 sector_t offset;
160 struct extent_position epos = {};
161
162 size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
163 f_pos = (udf_ext0_offset(dir) >> 2);
164
165 fibh->soffset = fibh->eoffset =
166 (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
167 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
168 fibh->sbh = fibh->ebh = NULL;
169 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
170 &epos, &eloc, &elen, &offset) ==
171 (EXT_RECORDED_ALLOCATED >> 30)) {
172 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
173 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
174 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
175 epos.offset -= sizeof(short_ad);
176 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
177 epos.offset -= sizeof(long_ad);
178 } else
179 offset = 0;
180
181 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
182 if (!fibh->sbh) {
183 brelse(epos.bh);
184 return NULL;
185 }
186 } else {
187 brelse(epos.bh);
188 return NULL;
189 }
190
191 while ((f_pos < size)) {
192 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
193 &elen, &offset);
194 if (!fi) {
195 if (fibh->sbh != fibh->ebh)
196 brelse(fibh->ebh);
197 brelse(fibh->sbh);
198 brelse(epos.bh);
199 return NULL;
200 }
201
202 liu = le16_to_cpu(cfi->lengthOfImpUse);
203 lfi = cfi->lengthFileIdent;
204
205 if (fibh->sbh == fibh->ebh) {
206 nameptr = fi->fileIdent + liu;
207 } else {
208 int poffset; /* Unpaded ending offset */
209
210 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
211 liu + lfi;
212
213 if (poffset >= lfi)
214 nameptr = (uint8_t *)(fibh->ebh->b_data +
215 poffset - lfi);
216 else {
217 nameptr = fname;
218 memcpy(nameptr, fi->fileIdent + liu,
219 lfi - poffset);
220 memcpy(nameptr + lfi - poffset,
221 fibh->ebh->b_data, poffset);
222 }
223 }
224
225 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
226 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
227 continue;
228 }
229
230 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
231 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
232 continue;
233 }
234
235 if (!lfi)
236 continue;
237
238 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
239 if (flen && udf_match(flen, fname, dentry->d_name.len,
240 dentry->d_name.name)) {
241 brelse(epos.bh);
242 return fi;
243 }
244 }
245
246 if (fibh->sbh != fibh->ebh)
247 brelse(fibh->ebh);
248 brelse(fibh->sbh);
249 brelse(epos.bh);
250
251 return NULL;
252 }
253
254 /*
255 * udf_lookup
256 *
257 * PURPOSE
258 * Look-up the inode for a given name.
259 *
260 * DESCRIPTION
261 * Required - lookup_dentry() will return -ENOTDIR if this routine is not
262 * available for a directory. The filesystem is useless if this routine is
263 * not available for at least the filesystem's root directory.
264 *
265 * This routine is passed an incomplete dentry - it must be completed by
266 * calling d_add(dentry, inode). If the name does not exist, then the
267 * specified inode must be set to null. An error should only be returned
268 * when the lookup fails for a reason other than the name not existing.
269 * Note that the directory inode semaphore is held during the call.
270 *
271 * Refer to lookup_dentry() in fs/namei.c
272 * lookup_dentry() -> lookup() -> real_lookup() -> .
273 *
274 * PRE-CONDITIONS
275 * dir Pointer to inode of parent directory.
276 * dentry Pointer to dentry to complete.
277 * nd Pointer to lookup nameidata
278 *
279 * POST-CONDITIONS
280 * <return> Zero on success.
281 *
282 * HISTORY
283 * July 1, 1997 - Andrew E. Mileski
284 * Written, tested, and released.
285 */
286
287 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
288 struct nameidata *nd)
289 {
290 struct inode *inode = NULL;
291 struct fileIdentDesc cfi;
292 struct udf_fileident_bh fibh;
293
294 if (dentry->d_name.len > UDF_NAME_LEN - 2)
295 return ERR_PTR(-ENAMETOOLONG);
296
297 lock_kernel();
298 #ifdef UDF_RECOVERY
299 /* temporary shorthand for specifying files by inode number */
300 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
301 kernel_lb_addr lb = {
302 .logicalBlockNum = 0,
303 .partitionReferenceNum =
304 simple_strtoul(dentry->d_name.name + 3,
305 NULL, 0),
306 };
307 inode = udf_iget(dir->i_sb, lb);
308 if (!inode) {
309 unlock_kernel();
310 return ERR_PTR(-EACCES);
311 }
312 } else
313 #endif /* UDF_RECOVERY */
314
315 if (udf_find_entry(dir, dentry, &fibh, &cfi)) {
316 if (fibh.sbh != fibh.ebh)
317 brelse(fibh.ebh);
318 brelse(fibh.sbh);
319
320 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
321 if (!inode) {
322 unlock_kernel();
323 return ERR_PTR(-EACCES);
324 }
325 }
326 unlock_kernel();
327 d_add(dentry, inode);
328
329 return NULL;
330 }
331
332 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
333 struct dentry *dentry,
334 struct udf_fileident_bh *fibh,
335 struct fileIdentDesc *cfi, int *err)
336 {
337 struct super_block *sb = dir->i_sb;
338 struct fileIdentDesc *fi = NULL;
339 char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
340 int namelen;
341 loff_t f_pos;
342 int flen;
343 char *nameptr;
344 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
345 int nfidlen;
346 uint8_t lfi;
347 uint16_t liu;
348 int block;
349 kernel_lb_addr eloc;
350 uint32_t elen;
351 sector_t offset;
352 struct extent_position epos = {};
353
354 if (dentry) {
355 if (!dentry->d_name.len) {
356 *err = -EINVAL;
357 return NULL;
358 }
359 namelen = udf_put_filename(sb, dentry->d_name.name, name,
360 dentry->d_name.len);
361 if (!namelen) {
362 *err = -ENAMETOOLONG;
363 return NULL;
364 }
365 } else {
366 namelen = 0;
367 }
368
369 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
370
371 f_pos = (udf_ext0_offset(dir) >> 2);
372
373 fibh->soffset = fibh->eoffset =
374 (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
375 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
376 fibh->sbh = fibh->ebh = NULL;
377 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
378 &epos, &eloc, &elen, &offset) ==
379 (EXT_RECORDED_ALLOCATED >> 30)) {
380 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
381 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
382 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
383 epos.offset -= sizeof(short_ad);
384 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
385 epos.offset -= sizeof(long_ad);
386 } else
387 offset = 0;
388
389 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
390 if (!fibh->sbh) {
391 brelse(epos.bh);
392 *err = -EIO;
393 return NULL;
394 }
395
396 block = UDF_I_LOCATION(dir).logicalBlockNum;
397
398 } else {
399 block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0);
400 fibh->sbh = fibh->ebh = NULL;
401 fibh->soffset = fibh->eoffset = sb->s_blocksize;
402 goto add;
403 }
404
405 while ((f_pos < size)) {
406 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
407 &elen, &offset);
408
409 if (!fi) {
410 if (fibh->sbh != fibh->ebh)
411 brelse(fibh->ebh);
412 brelse(fibh->sbh);
413 brelse(epos.bh);
414 *err = -EIO;
415 return NULL;
416 }
417
418 liu = le16_to_cpu(cfi->lengthOfImpUse);
419 lfi = cfi->lengthFileIdent;
420
421 if (fibh->sbh == fibh->ebh)
422 nameptr = fi->fileIdent + liu;
423 else {
424 int poffset; /* Unpaded ending offset */
425
426 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
427 liu + lfi;
428
429 if (poffset >= lfi)
430 nameptr = (char *)(fibh->ebh->b_data +
431 poffset - lfi);
432 else {
433 nameptr = fname;
434 memcpy(nameptr, fi->fileIdent + liu,
435 lfi - poffset);
436 memcpy(nameptr + lfi - poffset,
437 fibh->ebh->b_data, poffset);
438 }
439 }
440
441 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
442 if (((sizeof(struct fileIdentDesc) +
443 liu + lfi + 3) & ~3) == nfidlen) {
444 brelse(epos.bh);
445 cfi->descTag.tagSerialNum = cpu_to_le16(1);
446 cfi->fileVersionNum = cpu_to_le16(1);
447 cfi->fileCharacteristics = 0;
448 cfi->lengthFileIdent = namelen;
449 cfi->lengthOfImpUse = cpu_to_le16(0);
450 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
451 name))
452 return fi;
453 else {
454 *err = -EIO;
455 return NULL;
456 }
457 }
458 }
459
460 if (!lfi || !dentry)
461 continue;
462
463 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
464 if (flen && udf_match(flen, fname, dentry->d_name.len,
465 dentry->d_name.name)) {
466 if (fibh->sbh != fibh->ebh)
467 brelse(fibh->ebh);
468 brelse(fibh->sbh);
469 brelse(epos.bh);
470 *err = -EEXIST;
471 return NULL;
472 }
473 }
474
475 add:
476 f_pos += nfidlen;
477
478 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB &&
479 sb->s_blocksize - fibh->eoffset < nfidlen) {
480 brelse(epos.bh);
481 epos.bh = NULL;
482 fibh->soffset -= udf_ext0_offset(dir);
483 fibh->eoffset -= udf_ext0_offset(dir);
484 f_pos -= (udf_ext0_offset(dir) >> 2);
485 if (fibh->sbh != fibh->ebh)
486 brelse(fibh->ebh);
487 brelse(fibh->sbh);
488 fibh->sbh = fibh->ebh =
489 udf_expand_dir_adinicb(dir, &block, err);
490 if (!fibh->sbh)
491 return NULL;
492 epos.block = UDF_I_LOCATION(dir);
493 eloc.logicalBlockNum = block;
494 eloc.partitionReferenceNum =
495 UDF_I_LOCATION(dir).partitionReferenceNum;
496 elen = dir->i_sb->s_blocksize;
497 epos.offset = udf_file_entry_alloc_offset(dir);
498 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
499 epos.offset += sizeof(short_ad);
500 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
501 epos.offset += sizeof(long_ad);
502 }
503
504 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
505 fibh->soffset = fibh->eoffset;
506 fibh->eoffset += nfidlen;
507 if (fibh->sbh != fibh->ebh) {
508 brelse(fibh->sbh);
509 fibh->sbh = fibh->ebh;
510 }
511
512 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) {
513 block = UDF_I_LOCATION(dir).logicalBlockNum;
514 fi = (struct fileIdentDesc *)
515 (UDF_I_DATA(dir) + fibh->soffset -
516 udf_ext0_offset(dir) +
517 UDF_I_LENEATTR(dir));
518 } else {
519 block = eloc.logicalBlockNum +
520 ((elen - 1) >>
521 dir->i_sb->s_blocksize_bits);
522 fi = (struct fileIdentDesc *)
523 (fibh->sbh->b_data + fibh->soffset);
524 }
525 } else {
526 fibh->soffset = fibh->eoffset - sb->s_blocksize;
527 fibh->eoffset += nfidlen - sb->s_blocksize;
528 if (fibh->sbh != fibh->ebh) {
529 brelse(fibh->sbh);
530 fibh->sbh = fibh->ebh;
531 }
532
533 block = eloc.logicalBlockNum + ((elen - 1) >>
534 dir->i_sb->s_blocksize_bits);
535 fibh->ebh = udf_bread(dir,
536 f_pos >> (dir->i_sb->s_blocksize_bits - 2),
537 1, err);
538 if (!fibh->ebh) {
539 brelse(epos.bh);
540 brelse(fibh->sbh);
541 return NULL;
542 }
543
544 if (!fibh->soffset) {
545 if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
546 (EXT_RECORDED_ALLOCATED >> 30)) {
547 block = eloc.logicalBlockNum + ((elen - 1) >>
548 dir->i_sb->s_blocksize_bits);
549 } else
550 block++;
551
552 brelse(fibh->sbh);
553 fibh->sbh = fibh->ebh;
554 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
555 } else {
556 fi = (struct fileIdentDesc *)
557 (fibh->sbh->b_data + sb->s_blocksize +
558 fibh->soffset);
559 }
560 }
561
562 memset(cfi, 0, sizeof(struct fileIdentDesc));
563 if (UDF_SB(sb)->s_udfrev >= 0x0200)
564 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
565 sizeof(tag));
566 else
567 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
568 sizeof(tag));
569 cfi->fileVersionNum = cpu_to_le16(1);
570 cfi->lengthFileIdent = namelen;
571 cfi->lengthOfImpUse = cpu_to_le16(0);
572 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
573 brelse(epos.bh);
574 dir->i_size += nfidlen;
575 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
576 UDF_I_LENALLOC(dir) += nfidlen;
577 mark_inode_dirty(dir);
578 return fi;
579 } else {
580 brelse(epos.bh);
581 if (fibh->sbh != fibh->ebh)
582 brelse(fibh->ebh);
583 brelse(fibh->sbh);
584 *err = -EIO;
585 return NULL;
586 }
587 }
588
589 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
590 struct udf_fileident_bh *fibh,
591 struct fileIdentDesc *cfi)
592 {
593 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
594
595 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
596 memset(&(cfi->icb), 0x00, sizeof(long_ad));
597
598 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
599 }
600
601 static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
602 struct nameidata *nd)
603 {
604 struct udf_fileident_bh fibh;
605 struct inode *inode;
606 struct fileIdentDesc cfi, *fi;
607 int err;
608
609 lock_kernel();
610 inode = udf_new_inode(dir, mode, &err);
611 if (!inode) {
612 unlock_kernel();
613 return err;
614 }
615
616 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
617 inode->i_data.a_ops = &udf_adinicb_aops;
618 else
619 inode->i_data.a_ops = &udf_aops;
620 inode->i_op = &udf_file_inode_operations;
621 inode->i_fop = &udf_file_operations;
622 inode->i_mode = mode;
623 mark_inode_dirty(inode);
624
625 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
626 if (!fi) {
627 inode->i_nlink--;
628 mark_inode_dirty(inode);
629 iput(inode);
630 unlock_kernel();
631 return err;
632 }
633 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
634 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
635 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
636 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
637 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
638 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
639 mark_inode_dirty(dir);
640 if (fibh.sbh != fibh.ebh)
641 brelse(fibh.ebh);
642 brelse(fibh.sbh);
643 unlock_kernel();
644 d_instantiate(dentry, inode);
645
646 return 0;
647 }
648
649 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
650 dev_t rdev)
651 {
652 struct inode *inode;
653 struct udf_fileident_bh fibh;
654 struct fileIdentDesc cfi, *fi;
655 int err;
656
657 if (!old_valid_dev(rdev))
658 return -EINVAL;
659
660 lock_kernel();
661 err = -EIO;
662 inode = udf_new_inode(dir, mode, &err);
663 if (!inode)
664 goto out;
665
666 inode->i_uid = current->fsuid;
667 init_special_inode(inode, mode, rdev);
668 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
669 if (!fi) {
670 inode->i_nlink--;
671 mark_inode_dirty(inode);
672 iput(inode);
673 unlock_kernel();
674 return err;
675 }
676 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
677 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
678 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
679 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
680 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
681 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
682 mark_inode_dirty(dir);
683 mark_inode_dirty(inode);
684
685 if (fibh.sbh != fibh.ebh)
686 brelse(fibh.ebh);
687 brelse(fibh.sbh);
688 d_instantiate(dentry, inode);
689 err = 0;
690
691 out:
692 unlock_kernel();
693 return err;
694 }
695
696 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
697 {
698 struct inode *inode;
699 struct udf_fileident_bh fibh;
700 struct fileIdentDesc cfi, *fi;
701 int err;
702
703 lock_kernel();
704 err = -EMLINK;
705 if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
706 goto out;
707
708 err = -EIO;
709 inode = udf_new_inode(dir, S_IFDIR, &err);
710 if (!inode)
711 goto out;
712
713 inode->i_op = &udf_dir_inode_operations;
714 inode->i_fop = &udf_dir_operations;
715 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
716 if (!fi) {
717 inode->i_nlink--;
718 mark_inode_dirty(inode);
719 iput(inode);
720 goto out;
721 }
722 inode->i_nlink = 2;
723 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
724 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir));
725 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
726 cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL);
727 cfi.fileCharacteristics =
728 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
729 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
730 brelse(fibh.sbh);
731 inode->i_mode = S_IFDIR | mode;
732 if (dir->i_mode & S_ISGID)
733 inode->i_mode |= S_ISGID;
734 mark_inode_dirty(inode);
735
736 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
737 if (!fi) {
738 inode->i_nlink = 0;
739 mark_inode_dirty(inode);
740 iput(inode);
741 goto out;
742 }
743 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
744 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
745 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
746 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
747 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
748 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
749 inc_nlink(dir);
750 mark_inode_dirty(dir);
751 d_instantiate(dentry, inode);
752 if (fibh.sbh != fibh.ebh)
753 brelse(fibh.ebh);
754 brelse(fibh.sbh);
755 err = 0;
756
757 out:
758 unlock_kernel();
759 return err;
760 }
761
762 static int empty_dir(struct inode *dir)
763 {
764 struct fileIdentDesc *fi, cfi;
765 struct udf_fileident_bh fibh;
766 loff_t f_pos;
767 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
768 int block;
769 kernel_lb_addr eloc;
770 uint32_t elen;
771 sector_t offset;
772 struct extent_position epos = {};
773
774 f_pos = (udf_ext0_offset(dir) >> 2);
775
776 fibh.soffset = fibh.eoffset =
777 (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
778
779 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
780 fibh.sbh = fibh.ebh = NULL;
781 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
782 &epos, &eloc, &elen, &offset) ==
783 (EXT_RECORDED_ALLOCATED >> 30)) {
784 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
785 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
786 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
787 epos.offset -= sizeof(short_ad);
788 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
789 epos.offset -= sizeof(long_ad);
790 } else
791 offset = 0;
792
793 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
794 if (!fibh.sbh) {
795 brelse(epos.bh);
796 return 0;
797 }
798 } else {
799 brelse(epos.bh);
800 return 0;
801 }
802
803 while ((f_pos < size)) {
804 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
805 &elen, &offset);
806 if (!fi) {
807 if (fibh.sbh != fibh.ebh)
808 brelse(fibh.ebh);
809 brelse(fibh.sbh);
810 brelse(epos.bh);
811 return 0;
812 }
813
814 if (cfi.lengthFileIdent &&
815 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
816 if (fibh.sbh != fibh.ebh)
817 brelse(fibh.ebh);
818 brelse(fibh.sbh);
819 brelse(epos.bh);
820 return 0;
821 }
822 }
823
824 if (fibh.sbh != fibh.ebh)
825 brelse(fibh.ebh);
826 brelse(fibh.sbh);
827 brelse(epos.bh);
828
829 return 1;
830 }
831
832 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
833 {
834 int retval;
835 struct inode *inode = dentry->d_inode;
836 struct udf_fileident_bh fibh;
837 struct fileIdentDesc *fi, cfi;
838 kernel_lb_addr tloc;
839
840 retval = -ENOENT;
841 lock_kernel();
842 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
843 if (!fi)
844 goto out;
845
846 retval = -EIO;
847 tloc = lelb_to_cpu(cfi.icb.extLocation);
848 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
849 goto end_rmdir;
850 retval = -ENOTEMPTY;
851 if (!empty_dir(inode))
852 goto end_rmdir;
853 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
854 if (retval)
855 goto end_rmdir;
856 if (inode->i_nlink != 2)
857 udf_warning(inode->i_sb, "udf_rmdir",
858 "empty directory has nlink != 2 (%d)",
859 inode->i_nlink);
860 clear_nlink(inode);
861 inode->i_size = 0;
862 inode_dec_link_count(dir);
863 inode->i_ctime = dir->i_ctime = dir->i_mtime =
864 current_fs_time(dir->i_sb);
865 mark_inode_dirty(dir);
866
867 end_rmdir:
868 if (fibh.sbh != fibh.ebh)
869 brelse(fibh.ebh);
870 brelse(fibh.sbh);
871
872 out:
873 unlock_kernel();
874 return retval;
875 }
876
877 static int udf_unlink(struct inode *dir, struct dentry *dentry)
878 {
879 int retval;
880 struct inode *inode = dentry->d_inode;
881 struct udf_fileident_bh fibh;
882 struct fileIdentDesc *fi;
883 struct fileIdentDesc cfi;
884 kernel_lb_addr tloc;
885
886 retval = -ENOENT;
887 lock_kernel();
888 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
889 if (!fi)
890 goto out;
891
892 retval = -EIO;
893 tloc = lelb_to_cpu(cfi.icb.extLocation);
894 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
895 goto end_unlink;
896
897 if (!inode->i_nlink) {
898 udf_debug("Deleting nonexistent file (%lu), %d\n",
899 inode->i_ino, inode->i_nlink);
900 inode->i_nlink = 1;
901 }
902 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
903 if (retval)
904 goto end_unlink;
905 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
906 mark_inode_dirty(dir);
907 inode_dec_link_count(inode);
908 inode->i_ctime = dir->i_ctime;
909 retval = 0;
910
911 end_unlink:
912 if (fibh.sbh != fibh.ebh)
913 brelse(fibh.ebh);
914 brelse(fibh.sbh);
915
916 out:
917 unlock_kernel();
918 return retval;
919 }
920
921 static int udf_symlink(struct inode *dir, struct dentry *dentry,
922 const char *symname)
923 {
924 struct inode *inode;
925 struct pathComponent *pc;
926 char *compstart;
927 struct udf_fileident_bh fibh;
928 struct extent_position epos = {};
929 int eoffset, elen = 0;
930 struct fileIdentDesc *fi;
931 struct fileIdentDesc cfi;
932 char *ea;
933 int err;
934 int block;
935 char name[UDF_NAME_LEN];
936 int namelen;
937 struct buffer_head *bh;
938
939 lock_kernel();
940 inode = udf_new_inode(dir, S_IFLNK, &err);
941 if (!inode)
942 goto out;
943
944 inode->i_mode = S_IFLNK | S_IRWXUGO;
945 inode->i_data.a_ops = &udf_symlink_aops;
946 inode->i_op = &page_symlink_inode_operations;
947
948 if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB) {
949 kernel_lb_addr eloc;
950 uint32_t elen;
951
952 block = udf_new_block(inode->i_sb, inode,
953 UDF_I_LOCATION(inode).partitionReferenceNum,
954 UDF_I_LOCATION(inode).logicalBlockNum, &err);
955 if (!block)
956 goto out_no_entry;
957 epos.block = UDF_I_LOCATION(inode);
958 epos.offset = udf_file_entry_alloc_offset(inode);
959 epos.bh = NULL;
960 eloc.logicalBlockNum = block;
961 eloc.partitionReferenceNum =
962 UDF_I_LOCATION(inode).partitionReferenceNum;
963 elen = inode->i_sb->s_blocksize;
964 UDF_I_LENEXTENTS(inode) = elen;
965 udf_add_aext(inode, &epos, eloc, elen, 0);
966 brelse(epos.bh);
967
968 block = udf_get_pblock(inode->i_sb, block,
969 UDF_I_LOCATION(inode).partitionReferenceNum,
970 0);
971 epos.bh = udf_tread(inode->i_sb, block);
972 lock_buffer(epos.bh);
973 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
974 set_buffer_uptodate(epos.bh);
975 unlock_buffer(epos.bh);
976 mark_buffer_dirty_inode(epos.bh, inode);
977 ea = epos.bh->b_data + udf_ext0_offset(inode);
978 } else {
979 ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode);
980 }
981
982 eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
983 pc = (struct pathComponent *)ea;
984
985 if (*symname == '/') {
986 do {
987 symname++;
988 } while (*symname == '/');
989
990 pc->componentType = 1;
991 pc->lengthComponentIdent = 0;
992 pc->componentFileVersionNum = 0;
993 pc += sizeof(struct pathComponent);
994 elen += sizeof(struct pathComponent);
995 }
996
997 err = -ENAMETOOLONG;
998
999 while (*symname) {
1000 if (elen + sizeof(struct pathComponent) > eoffset)
1001 goto out_no_entry;
1002
1003 pc = (struct pathComponent *)(ea + elen);
1004
1005 compstart = (char *)symname;
1006
1007 do {
1008 symname++;
1009 } while (*symname && *symname != '/');
1010
1011 pc->componentType = 5;
1012 pc->lengthComponentIdent = 0;
1013 pc->componentFileVersionNum = 0;
1014 if (compstart[0] == '.') {
1015 if ((symname - compstart) == 1)
1016 pc->componentType = 4;
1017 else if ((symname - compstart) == 2 &&
1018 compstart[1] == '.')
1019 pc->componentType = 3;
1020 }
1021
1022 if (pc->componentType == 5) {
1023 namelen = udf_put_filename(inode->i_sb, compstart, name,
1024 symname - compstart);
1025 if (!namelen)
1026 goto out_no_entry;
1027
1028 if (elen + sizeof(struct pathComponent) + namelen >
1029 eoffset)
1030 goto out_no_entry;
1031 else
1032 pc->lengthComponentIdent = namelen;
1033
1034 memcpy(pc->componentIdent, name, namelen);
1035 }
1036
1037 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1038
1039 if (*symname) {
1040 do {
1041 symname++;
1042 } while (*symname == '/');
1043 }
1044 }
1045
1046 brelse(epos.bh);
1047 inode->i_size = elen;
1048 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
1049 UDF_I_LENALLOC(inode) = inode->i_size;
1050 mark_inode_dirty(inode);
1051
1052 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1053 if (!fi)
1054 goto out_no_entry;
1055 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1056 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
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_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1075 mark_inode_dirty(dir);
1076 if (fibh.sbh != fibh.ebh)
1077 brelse(fibh.ebh);
1078 brelse(fibh.sbh);
1079 d_instantiate(dentry, inode);
1080 err = 0;
1081
1082 out:
1083 unlock_kernel();
1084 return err;
1085
1086 out_no_entry:
1087 inode_dec_link_count(inode);
1088 iput(inode);
1089 goto out;
1090 }
1091
1092 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1093 struct dentry *dentry)
1094 {
1095 struct inode *inode = old_dentry->d_inode;
1096 struct udf_fileident_bh fibh;
1097 struct fileIdentDesc cfi, *fi;
1098 int err;
1099 struct buffer_head *bh;
1100
1101 lock_kernel();
1102 if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
1103 unlock_kernel();
1104 return -EMLINK;
1105 }
1106
1107 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1108 if (!fi) {
1109 unlock_kernel();
1110 return err;
1111 }
1112 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1113 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
1114 bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1115 if (bh) {
1116 struct logicalVolIntegrityDesc *lvid =
1117 (struct logicalVolIntegrityDesc *)bh->b_data;
1118 struct logicalVolHeaderDesc *lvhd;
1119 uint64_t uniqueID;
1120 lvhd = (struct logicalVolHeaderDesc *)
1121 (lvid->logicalVolContentsUse);
1122 uniqueID = le64_to_cpu(lvhd->uniqueID);
1123 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1124 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1125 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1126 uniqueID += 16;
1127 lvhd->uniqueID = cpu_to_le64(uniqueID);
1128 mark_buffer_dirty(bh);
1129 }
1130 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1131 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1132 mark_inode_dirty(dir);
1133
1134 if (fibh.sbh != fibh.ebh)
1135 brelse(fibh.ebh);
1136 brelse(fibh.sbh);
1137 inc_nlink(inode);
1138 inode->i_ctime = current_fs_time(inode->i_sb);
1139 mark_inode_dirty(inode);
1140 atomic_inc(&inode->i_count);
1141 d_instantiate(dentry, inode);
1142 unlock_kernel();
1143
1144 return 0;
1145 }
1146
1147 /* Anybody can rename anything with this: the permission checks are left to the
1148 * higher-level routines.
1149 */
1150 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1151 struct inode *new_dir, struct dentry *new_dentry)
1152 {
1153 struct inode *old_inode = old_dentry->d_inode;
1154 struct inode *new_inode = new_dentry->d_inode;
1155 struct udf_fileident_bh ofibh, nfibh;
1156 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1157 struct fileIdentDesc ocfi, ncfi;
1158 struct buffer_head *dir_bh = NULL;
1159 int retval = -ENOENT;
1160 kernel_lb_addr tloc;
1161
1162 lock_kernel();
1163 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1164 if (ofi) {
1165 if (ofibh.sbh != ofibh.ebh)
1166 brelse(ofibh.ebh);
1167 brelse(ofibh.sbh);
1168 }
1169 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1170 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1171 != old_inode->i_ino)
1172 goto end_rename;
1173
1174 nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1175 if (nfi) {
1176 if (!new_inode) {
1177 if (nfibh.sbh != nfibh.ebh)
1178 brelse(nfibh.ebh);
1179 brelse(nfibh.sbh);
1180 nfi = NULL;
1181 }
1182 }
1183 if (S_ISDIR(old_inode->i_mode)) {
1184 uint32_t offset = udf_ext0_offset(old_inode);
1185
1186 if (new_inode) {
1187 retval = -ENOTEMPTY;
1188 if (!empty_dir(new_inode))
1189 goto end_rename;
1190 }
1191 retval = -EIO;
1192 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) {
1193 dir_fi = udf_get_fileident(
1194 UDF_I_DATA(old_inode) -
1195 (UDF_I_EFE(old_inode) ?
1196 sizeof(struct extendedFileEntry) :
1197 sizeof(struct fileEntry)),
1198 old_inode->i_sb->s_blocksize, &offset);
1199 } else {
1200 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1201 if (!dir_bh)
1202 goto end_rename;
1203 dir_fi = udf_get_fileident(dir_bh->b_data,
1204 old_inode->i_sb->s_blocksize, &offset);
1205 }
1206 if (!dir_fi)
1207 goto end_rename;
1208 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1209 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) !=
1210 old_dir->i_ino)
1211 goto end_rename;
1212
1213 retval = -EMLINK;
1214 if (!new_inode &&
1215 new_dir->i_nlink >=
1216 (256 << sizeof(new_dir->i_nlink)) - 1)
1217 goto end_rename;
1218 }
1219 if (!nfi) {
1220 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1221 &retval);
1222 if (!nfi)
1223 goto end_rename;
1224 }
1225
1226 /*
1227 * Like most other Unix systems, set the ctime for inodes on a
1228 * rename.
1229 */
1230 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1231 mark_inode_dirty(old_inode);
1232
1233 /*
1234 * ok, that's it
1235 */
1236 ncfi.fileVersionNum = ocfi.fileVersionNum;
1237 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1238 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1239 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1240
1241 /* The old fid may have moved - find it again */
1242 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1243 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1244
1245 if (new_inode) {
1246 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1247 inode_dec_link_count(new_inode);
1248 }
1249 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1250 mark_inode_dirty(old_dir);
1251
1252 if (dir_fi) {
1253 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir));
1254 udf_update_tag((char *)dir_fi,
1255 (sizeof(struct fileIdentDesc) +
1256 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1257 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
1258 mark_inode_dirty(old_inode);
1259 else
1260 mark_buffer_dirty_inode(dir_bh, old_inode);
1261
1262 inode_dec_link_count(old_dir);
1263 if (new_inode)
1264 inode_dec_link_count(new_inode);
1265 else {
1266 inc_nlink(new_dir);
1267 mark_inode_dirty(new_dir);
1268 }
1269 }
1270
1271 if (ofi) {
1272 if (ofibh.sbh != ofibh.ebh)
1273 brelse(ofibh.ebh);
1274 brelse(ofibh.sbh);
1275 }
1276
1277 retval = 0;
1278
1279 end_rename:
1280 brelse(dir_bh);
1281 if (nfi) {
1282 if (nfibh.sbh != nfibh.ebh)
1283 brelse(nfibh.ebh);
1284 brelse(nfibh.sbh);
1285 }
1286 unlock_kernel();
1287
1288 return retval;
1289 }
1290
1291 const struct inode_operations udf_dir_inode_operations = {
1292 .lookup = udf_lookup,
1293 .create = udf_create,
1294 .link = udf_link,
1295 .unlink = udf_unlink,
1296 .symlink = udf_symlink,
1297 .mkdir = udf_mkdir,
1298 .rmdir = udf_rmdir,
1299 .mknod = udf_mknod,
1300 .rename = udf_rename,
1301 };