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Linux v2.6.13
[linux-2.6/next.git] / fs / udf / namei.c
blobac191ed7df0ac74cf57ca06152fd2b5fcd6367f5
1 /*
2 * namei.c
3 *
4 * PURPOSE
5 * Inode name handling routines for the OSTA-UDF(tm) filesystem.
6 *
7 * CONTACTS
8 * E-mail regarding any portion of the Linux UDF file system should be
9 * directed to the development team mailing list (run by majordomo):
10 * linux_udf@hpesjro.fc.hp.com
11 *
12 * COPYRIGHT
13 * This file is distributed under the terms of the GNU General Public
14 * License (GPL). Copies of the GPL can be obtained from:
15 * ftp://prep.ai.mit.edu/pub/gnu/GPL
16 * Each contributing author retains all rights to their own work.
17 *
18 * (C) 1998-2004 Ben Fennema
19 * (C) 1999-2000 Stelias Computing Inc
20 *
21 * HISTORY
22 *
23 * 12/12/98 blf Created. Split out the lookup code from dir.c
24 * 04/19/99 blf link, mknod, symlink support
25 */
26
27 #include "udfdecl.h"
28
29 #include "udf_i.h"
30 #include "udf_sb.h"
31 #include <linux/string.h>
32 #include <linux/errno.h>
33 #include <linux/mm.h>
34 #include <linux/slab.h>
35 #include <linux/quotaops.h>
36 #include <linux/smp_lock.h>
37 #include <linux/buffer_head.h>
38
39 static inline int udf_match(int len1, const char *name1, int len2, const char *name2)
40 {
41 if (len1 != len2)
42 return 0;
43 return !memcmp(name1, name2, len1);
44 }
45
46 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
47 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
48 uint8_t *impuse, uint8_t *fileident)
49 {
50 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
51 uint16_t crc;
52 uint8_t checksum = 0;
53 int i;
54 int offset;
55 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
56 uint8_t lfi = cfi->lengthFileIdent;
57 int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
58 sizeof(struct fileIdentDesc);
59 int adinicb = 0;
60
61 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
62 adinicb = 1;
63
64 offset = fibh->soffset + sizeof(struct fileIdentDesc);
65
66 if (impuse)
67 {
68 if (adinicb || (offset + liu < 0))
69 memcpy((uint8_t *)sfi->impUse, impuse, liu);
70 else if (offset >= 0)
71 memcpy(fibh->ebh->b_data + offset, impuse, liu);
72 else
73 {
74 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
75 memcpy(fibh->ebh->b_data, impuse - offset, liu + offset);
76 }
77 }
78
79 offset += liu;
80
81 if (fileident)
82 {
83 if (adinicb || (offset + lfi < 0))
84 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
85 else if (offset >= 0)
86 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
87 else
88 {
89 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, -offset);
90 memcpy(fibh->ebh->b_data, fileident - offset, lfi + offset);
91 }
92 }
93
94 offset += lfi;
95
96 if (adinicb || (offset + padlen < 0))
97 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
98 else if (offset >= 0)
99 memset(fibh->ebh->b_data + offset, 0x00, padlen);
100 else
101 {
102 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
103 memset(fibh->ebh->b_data, 0x00, padlen + offset);
104 }
105
106 crc = udf_crc((uint8_t *)cfi + sizeof(tag), sizeof(struct fileIdentDesc) -
107 sizeof(tag), 0);
108
109 if (fibh->sbh == fibh->ebh)
110 crc = udf_crc((uint8_t *)sfi->impUse,
111 crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
112 else if (sizeof(struct fileIdentDesc) >= -fibh->soffset)
113 crc = udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + fibh->soffset,
114 crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
115 else
116 {
117 crc = udf_crc((uint8_t *)sfi->impUse,
118 -fibh->soffset - sizeof(struct fileIdentDesc), crc);
119 crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
120 }
121
122 cfi->descTag.descCRC = cpu_to_le16(crc);
123 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
124
125 for (i=0; i<16; i++)
126 if (i != 4)
127 checksum += ((uint8_t *)&cfi->descTag)[i];
128
129 cfi->descTag.tagChecksum = checksum;
130 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset))
131 memcpy((uint8_t *)sfi, (uint8_t *)cfi, sizeof(struct fileIdentDesc));
132 else
133 {
134 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
135 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
136 sizeof(struct fileIdentDesc) + fibh->soffset);
137 }
138
139 if (adinicb)
140 mark_inode_dirty(inode);
141 else
142 {
143 if (fibh->sbh != fibh->ebh)
144 mark_buffer_dirty_inode(fibh->ebh, inode);
145 mark_buffer_dirty_inode(fibh->sbh, inode);
146 }
147 return 0;
148 }
149
150 static struct fileIdentDesc *
151 udf_find_entry(struct inode *dir, struct dentry *dentry,
152 struct udf_fileident_bh *fibh,
153 struct fileIdentDesc *cfi)
154 {
155 struct fileIdentDesc *fi=NULL;
156 loff_t f_pos;
157 int block, flen;
158 char fname[UDF_NAME_LEN];
159 char *nameptr;
160 uint8_t lfi;
161 uint16_t liu;
162 loff_t size;
163 kernel_lb_addr bloc, eloc;
164 uint32_t extoffset, elen, offset;
165 struct buffer_head *bh = NULL;
166
167 size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
168 f_pos = (udf_ext0_offset(dir) >> 2);
169
170 fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
171 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
172 fibh->sbh = fibh->ebh = NULL;
173 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
174 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
175 {
176 offset >>= dir->i_sb->s_blocksize_bits;
177 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
178 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
179 {
180 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
181 extoffset -= sizeof(short_ad);
182 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
183 extoffset -= sizeof(long_ad);
184 }
185 else
186 offset = 0;
187
188 if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
189 {
190 udf_release_data(bh);
191 return NULL;
192 }
193 }
194 else
195 {
196 udf_release_data(bh);
197 return NULL;
198 }
199
200 while ( (f_pos < size) )
201 {
202 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
203
204 if (!fi)
205 {
206 if (fibh->sbh != fibh->ebh)
207 udf_release_data(fibh->ebh);
208 udf_release_data(fibh->sbh);
209 udf_release_data(bh);
210 return NULL;
211 }
212
213 liu = le16_to_cpu(cfi->lengthOfImpUse);
214 lfi = cfi->lengthFileIdent;
215
216 if (fibh->sbh == fibh->ebh)
217 {
218 nameptr = fi->fileIdent + liu;
219 }
220 else
221 {
222 int poffset; /* Unpaded ending offset */
223
224 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
225
226 if (poffset >= lfi)
227 nameptr = (uint8_t *)(fibh->ebh->b_data + poffset - lfi);
228 else
229 {
230 nameptr = fname;
231 memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
232 memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
233 }
234 }
235
236 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
237 {
238 if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) )
239 continue;
240 }
241
242 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 )
243 {
244 if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) )
245 continue;
246 }
247
248 if (!lfi)
249 continue;
250
251 if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)))
252 {
253 if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
254 {
255 udf_release_data(bh);
256 return fi;
257 }
258 }
259 }
260 if (fibh->sbh != fibh->ebh)
261 udf_release_data(fibh->ebh);
262 udf_release_data(fibh->sbh);
263 udf_release_data(bh);
264 return NULL;
265 }
266
267 /*
268 * udf_lookup
269 *
270 * PURPOSE
271 * Look-up the inode for a given name.
272 *
273 * DESCRIPTION
274 * Required - lookup_dentry() will return -ENOTDIR if this routine is not
275 * available for a directory. The filesystem is useless if this routine is
276 * not available for at least the filesystem's root directory.
277 *
278 * This routine is passed an incomplete dentry - it must be completed by
279 * calling d_add(dentry, inode). If the name does not exist, then the
280 * specified inode must be set to null. An error should only be returned
281 * when the lookup fails for a reason other than the name not existing.
282 * Note that the directory inode semaphore is held during the call.
283 *
284 * Refer to lookup_dentry() in fs/namei.c
285 * lookup_dentry() -> lookup() -> real_lookup() -> .
286 *
287 * PRE-CONDITIONS
288 * dir Pointer to inode of parent directory.
289 * dentry Pointer to dentry to complete.
290 * nd Pointer to lookup nameidata
291 *
292 * POST-CONDITIONS
293 * <return> Zero on success.
294 *
295 * HISTORY
296 * July 1, 1997 - Andrew E. Mileski
297 * Written, tested, and released.
298 */
299
300 static struct dentry *
301 udf_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
302 {
303 struct inode *inode = NULL;
304 struct fileIdentDesc cfi, *fi;
305 struct udf_fileident_bh fibh;
306
307 if (dentry->d_name.len > UDF_NAME_LEN-2)
308 return ERR_PTR(-ENAMETOOLONG);
309
310 lock_kernel();
311 #ifdef UDF_RECOVERY
312 /* temporary shorthand for specifying files by inode number */
313 if (!strncmp(dentry->d_name.name, ".B=", 3) )
314 {
315 kernel_lb_addr lb = { 0, simple_strtoul(dentry->d_name.name+3, NULL, 0) };
316 inode = udf_iget(dir->i_sb, lb);
317 if (!inode)
318 {
319 unlock_kernel();
320 return ERR_PTR(-EACCES);
321 }
322 }
323 else
324 #endif /* UDF_RECOVERY */
325
326 if ((fi = udf_find_entry(dir, dentry, &fibh, &cfi)))
327 {
328 if (fibh.sbh != fibh.ebh)
329 udf_release_data(fibh.ebh);
330 udf_release_data(fibh.sbh);
331
332 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
333 if ( !inode )
334 {
335 unlock_kernel();
336 return ERR_PTR(-EACCES);
337 }
338 }
339 unlock_kernel();
340 d_add(dentry, inode);
341 return NULL;
342 }
343
344 static struct fileIdentDesc *
345 udf_add_entry(struct inode *dir, struct dentry *dentry,
346 struct udf_fileident_bh *fibh,
347 struct fileIdentDesc *cfi, int *err)
348 {
349 struct super_block *sb;
350 struct fileIdentDesc *fi=NULL;
351 char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
352 int namelen;
353 loff_t f_pos;
354 int flen;
355 char *nameptr;
356 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
357 int nfidlen;
358 uint8_t lfi;
359 uint16_t liu;
360 int block;
361 kernel_lb_addr bloc, eloc;
362 uint32_t extoffset, elen, offset;
363 struct buffer_head *bh = NULL;
364
365 sb = dir->i_sb;
366
367 if (dentry)
368 {
369 if (!dentry->d_name.len)
370 {
371 *err = -EINVAL;
372 return NULL;
373 }
374
375 if ( !(namelen = udf_put_filename(sb, dentry->d_name.name, name, dentry->d_name.len)))
376 {
377 *err = -ENAMETOOLONG;
378 return NULL;
379 }
380 }
381 else
382 namelen = 0;
383
384 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
385
386 f_pos = (udf_ext0_offset(dir) >> 2);
387
388 fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
389 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
390 fibh->sbh = fibh->ebh = NULL;
391 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
392 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
393 {
394 offset >>= dir->i_sb->s_blocksize_bits;
395 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
396 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
397 {
398 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
399 extoffset -= sizeof(short_ad);
400 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
401 extoffset -= sizeof(long_ad);
402 }
403 else
404 offset = 0;
405
406 if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
407 {
408 udf_release_data(bh);
409 *err = -EIO;
410 return NULL;
411 }
412
413 block = UDF_I_LOCATION(dir).logicalBlockNum;
414
415 }
416 else
417 {
418 block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0);
419 fibh->sbh = fibh->ebh = NULL;
420 fibh->soffset = fibh->eoffset = sb->s_blocksize;
421 goto add;
422 }
423
424 while ( (f_pos < size) )
425 {
426 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
427
428 if (!fi)
429 {
430 if (fibh->sbh != fibh->ebh)
431 udf_release_data(fibh->ebh);
432 udf_release_data(fibh->sbh);
433 udf_release_data(bh);
434 *err = -EIO;
435 return NULL;
436 }
437
438 liu = le16_to_cpu(cfi->lengthOfImpUse);
439 lfi = cfi->lengthFileIdent;
440
441 if (fibh->sbh == fibh->ebh)
442 nameptr = fi->fileIdent + liu;
443 else
444 {
445 int poffset; /* Unpaded ending offset */
446
447 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
448
449 if (poffset >= lfi)
450 nameptr = (char *)(fibh->ebh->b_data + poffset - lfi);
451 else
452 {
453 nameptr = fname;
454 memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
455 memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
456 }
457 }
458
459 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
460 {
461 if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen)
462 {
463 udf_release_data(bh);
464 cfi->descTag.tagSerialNum = cpu_to_le16(1);
465 cfi->fileVersionNum = cpu_to_le16(1);
466 cfi->fileCharacteristics = 0;
467 cfi->lengthFileIdent = namelen;
468 cfi->lengthOfImpUse = cpu_to_le16(0);
469 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
470 return fi;
471 else
472 {
473 *err = -EIO;
474 return NULL;
475 }
476 }
477 }
478
479 if (!lfi || !dentry)
480 continue;
481
482 if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) &&
483 udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
484 {
485 if (fibh->sbh != fibh->ebh)
486 udf_release_data(fibh->ebh);
487 udf_release_data(fibh->sbh);
488 udf_release_data(bh);
489 *err = -EEXIST;
490 return NULL;
491 }
492 }
493
494 add:
495 f_pos += nfidlen;
496
497 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB &&
498 sb->s_blocksize - fibh->eoffset < nfidlen)
499 {
500 udf_release_data(bh);
501 bh = NULL;
502 fibh->soffset -= udf_ext0_offset(dir);
503 fibh->eoffset -= udf_ext0_offset(dir);
504 f_pos -= (udf_ext0_offset(dir) >> 2);
505 if (fibh->sbh != fibh->ebh)
506 udf_release_data(fibh->ebh);
507 udf_release_data(fibh->sbh);
508 if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err)))
509 return NULL;
510 bloc = UDF_I_LOCATION(dir);
511 eloc.logicalBlockNum = block;
512 eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;
513 elen = dir->i_sb->s_blocksize;
514 extoffset = udf_file_entry_alloc_offset(dir);
515 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
516 extoffset += sizeof(short_ad);
517 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
518 extoffset += sizeof(long_ad);
519 }
520
521 if (sb->s_blocksize - fibh->eoffset >= nfidlen)
522 {
523 fibh->soffset = fibh->eoffset;
524 fibh->eoffset += nfidlen;
525 if (fibh->sbh != fibh->ebh)
526 {
527 udf_release_data(fibh->sbh);
528 fibh->sbh = fibh->ebh;
529 }
530
531 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
532 {
533 block = UDF_I_LOCATION(dir).logicalBlockNum;
534 fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - udf_ext0_offset(dir) + UDF_I_LENEATTR(dir));
535 }
536 else
537 {
538 block = eloc.logicalBlockNum + ((elen - 1) >>
539 dir->i_sb->s_blocksize_bits);
540 fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset);
541 }
542 }
543 else
544 {
545 fibh->soffset = fibh->eoffset - sb->s_blocksize;
546 fibh->eoffset += nfidlen - sb->s_blocksize;
547 if (fibh->sbh != fibh->ebh)
548 {
549 udf_release_data(fibh->sbh);
550 fibh->sbh = fibh->ebh;
551 }
552
553 block = eloc.logicalBlockNum + ((elen - 1) >>
554 dir->i_sb->s_blocksize_bits);
555
556 if (!(fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err)))
557 {
558 udf_release_data(bh);
559 udf_release_data(fibh->sbh);
560 return NULL;
561 }
562
563 if (!(fibh->soffset))
564 {
565 if (udf_next_aext(dir, &bloc, &extoffset, &eloc, &elen, &bh, 1) ==
566 (EXT_RECORDED_ALLOCATED >> 30))
567 {
568 block = eloc.logicalBlockNum + ((elen - 1) >>
569 dir->i_sb->s_blocksize_bits);
570 }
571 else
572 block ++;
573
574 udf_release_data(fibh->sbh);
575 fibh->sbh = fibh->ebh;
576 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
577 }
578 else
579 {
580 fi = (struct fileIdentDesc *)
581 (fibh->sbh->b_data + sb->s_blocksize + fibh->soffset);
582 }
583 }
584
585 memset(cfi, 0, sizeof(struct fileIdentDesc));
586 if (UDF_SB_UDFREV(sb) >= 0x0200)
587 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag));
588 else
589 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag));
590 cfi->fileVersionNum = cpu_to_le16(1);
591 cfi->lengthFileIdent = namelen;
592 cfi->lengthOfImpUse = cpu_to_le16(0);
593 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
594 {
595 udf_release_data(bh);
596 dir->i_size += nfidlen;
597 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
598 UDF_I_LENALLOC(dir) += nfidlen;
599 mark_inode_dirty(dir);
600 return fi;
601 }
602 else
603 {
604 udf_release_data(bh);
605 if (fibh->sbh != fibh->ebh)
606 udf_release_data(fibh->ebh);
607 udf_release_data(fibh->sbh);
608 *err = -EIO;
609 return NULL;
610 }
611 }
612
613 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
614 struct udf_fileident_bh *fibh, struct fileIdentDesc *cfi)
615 {
616 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
617 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
618 memset(&(cfi->icb), 0x00, sizeof(long_ad));
619 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
620 }
621
622 static int udf_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
623 {
624 struct udf_fileident_bh fibh;
625 struct inode *inode;
626 struct fileIdentDesc cfi, *fi;
627 int err;
628
629 lock_kernel();
630 inode = udf_new_inode(dir, mode, &err);
631 if (!inode)
632 {
633 unlock_kernel();
634 return err;
635 }
636
637 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
638 inode->i_data.a_ops = &udf_adinicb_aops;
639 else
640 inode->i_data.a_ops = &udf_aops;
641 inode->i_op = &udf_file_inode_operations;
642 inode->i_fop = &udf_file_operations;
643 inode->i_mode = mode;
644 mark_inode_dirty(inode);
645
646 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
647 {
648 inode->i_nlink --;
649 mark_inode_dirty(inode);
650 iput(inode);
651 unlock_kernel();
652 return err;
653 }
654 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
655 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
656 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
657 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
658 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
659 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
660 {
661 mark_inode_dirty(dir);
662 }
663 if (fibh.sbh != fibh.ebh)
664 udf_release_data(fibh.ebh);
665 udf_release_data(fibh.sbh);
666 unlock_kernel();
667 d_instantiate(dentry, inode);
668 return 0;
669 }
670
671 static int udf_mknod(struct inode * dir, struct dentry * dentry, int mode, dev_t rdev)
672 {
673 struct inode * inode;
674 struct udf_fileident_bh fibh;
675 struct fileIdentDesc cfi, *fi;
676 int err;
677
678 if (!old_valid_dev(rdev))
679 return -EINVAL;
680
681 lock_kernel();
682 err = -EIO;
683 inode = udf_new_inode(dir, mode, &err);
684 if (!inode)
685 goto out;
686
687 inode->i_uid = current->fsuid;
688 init_special_inode(inode, mode, rdev);
689 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
690 {
691 inode->i_nlink --;
692 mark_inode_dirty(inode);
693 iput(inode);
694 unlock_kernel();
695 return err;
696 }
697 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
698 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
699 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
700 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
701 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
702 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
703 {
704 mark_inode_dirty(dir);
705 }
706 mark_inode_dirty(inode);
707
708 if (fibh.sbh != fibh.ebh)
709 udf_release_data(fibh.ebh);
710 udf_release_data(fibh.sbh);
711 d_instantiate(dentry, inode);
712 err = 0;
713 out:
714 unlock_kernel();
715 return err;
716 }
717
718 static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode)
719 {
720 struct inode * inode;
721 struct udf_fileident_bh fibh;
722 struct fileIdentDesc cfi, *fi;
723 int err;
724
725 lock_kernel();
726 err = -EMLINK;
727 if (dir->i_nlink >= (256<<sizeof(dir->i_nlink))-1)
728 goto out;
729
730 err = -EIO;
731 inode = udf_new_inode(dir, S_IFDIR, &err);
732 if (!inode)
733 goto out;
734
735 inode->i_op = &udf_dir_inode_operations;
736 inode->i_fop = &udf_dir_operations;
737 if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err)))
738 {
739 inode->i_nlink--;
740 mark_inode_dirty(inode);
741 iput(inode);
742 goto out;
743 }
744 inode->i_nlink = 2;
745 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
746 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir));
747 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
748 cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL);
749 cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
750 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
751 udf_release_data(fibh.sbh);
752 inode->i_mode = S_IFDIR | mode;
753 if (dir->i_mode & S_ISGID)
754 inode->i_mode |= S_ISGID;
755 mark_inode_dirty(inode);
756
757 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
758 {
759 inode->i_nlink = 0;
760 mark_inode_dirty(inode);
761 iput(inode);
762 goto out;
763 }
764 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
765 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
766 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
767 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
768 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
769 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
770 dir->i_nlink++;
771 mark_inode_dirty(dir);
772 d_instantiate(dentry, inode);
773 if (fibh.sbh != fibh.ebh)
774 udf_release_data(fibh.ebh);
775 udf_release_data(fibh.sbh);
776 err = 0;
777 out:
778 unlock_kernel();
779 return err;
780 }
781
782 static int empty_dir(struct inode *dir)
783 {
784 struct fileIdentDesc *fi, cfi;
785 struct udf_fileident_bh fibh;
786 loff_t f_pos;
787 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
788 int block;
789 kernel_lb_addr bloc, eloc;
790 uint32_t extoffset, elen, offset;
791 struct buffer_head *bh = NULL;
792
793 f_pos = (udf_ext0_offset(dir) >> 2);
794
795 fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
796
797 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
798 fibh.sbh = fibh.ebh = NULL;
799 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
800 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
801 {
802 offset >>= dir->i_sb->s_blocksize_bits;
803 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
804 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
805 {
806 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
807 extoffset -= sizeof(short_ad);
808 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
809 extoffset -= sizeof(long_ad);
810 }
811 else
812 offset = 0;
813
814 if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block)))
815 {
816 udf_release_data(bh);
817 return 0;
818 }
819 }
820 else
821 {
822 udf_release_data(bh);
823 return 0;
824 }
825
826
827 while ( (f_pos < size) )
828 {
829 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
830
831 if (!fi)
832 {
833 if (fibh.sbh != fibh.ebh)
834 udf_release_data(fibh.ebh);
835 udf_release_data(fibh.sbh);
836 udf_release_data(bh);
837 return 0;
838 }
839
840 if (cfi.lengthFileIdent && (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0)
841 {
842 if (fibh.sbh != fibh.ebh)
843 udf_release_data(fibh.ebh);
844 udf_release_data(fibh.sbh);
845 udf_release_data(bh);
846 return 0;
847 }
848 }
849 if (fibh.sbh != fibh.ebh)
850 udf_release_data(fibh.ebh);
851 udf_release_data(fibh.sbh);
852 udf_release_data(bh);
853 return 1;
854 }
855
856 static int udf_rmdir(struct inode * dir, struct dentry * dentry)
857 {
858 int retval;
859 struct inode * inode = dentry->d_inode;
860 struct udf_fileident_bh fibh;
861 struct fileIdentDesc *fi, cfi;
862 kernel_lb_addr tloc;
863
864 retval = -ENOENT;
865 lock_kernel();
866 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
867 if (!fi)
868 goto out;
869
870 retval = -EIO;
871 tloc = lelb_to_cpu(cfi.icb.extLocation);
872 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
873 goto end_rmdir;
874 retval = -ENOTEMPTY;
875 if (!empty_dir(inode))
876 goto end_rmdir;
877 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
878 if (retval)
879 goto end_rmdir;
880 if (inode->i_nlink != 2)
881 udf_warning(inode->i_sb, "udf_rmdir",
882 "empty directory has nlink != 2 (%d)",
883 inode->i_nlink);
884 inode->i_nlink = 0;
885 inode->i_size = 0;
886 mark_inode_dirty(inode);
887 dir->i_nlink --;
888 inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
889 mark_inode_dirty(dir);
890
891 end_rmdir:
892 if (fibh.sbh != fibh.ebh)
893 udf_release_data(fibh.ebh);
894 udf_release_data(fibh.sbh);
895 out:
896 unlock_kernel();
897 return retval;
898 }
899
900 static int udf_unlink(struct inode * dir, struct dentry * dentry)
901 {
902 int retval;
903 struct inode * inode = dentry->d_inode;
904 struct udf_fileident_bh fibh;
905 struct fileIdentDesc *fi;
906 struct fileIdentDesc cfi;
907 kernel_lb_addr tloc;
908
909 retval = -ENOENT;
910 lock_kernel();
911 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
912 if (!fi)
913 goto out;
914
915 retval = -EIO;
916 tloc = lelb_to_cpu(cfi.icb.extLocation);
917 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
918 goto end_unlink;
919
920 if (!inode->i_nlink)
921 {
922 udf_debug("Deleting nonexistent file (%lu), %d\n",
923 inode->i_ino, inode->i_nlink);
924 inode->i_nlink = 1;
925 }
926 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
927 if (retval)
928 goto end_unlink;
929 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
930 mark_inode_dirty(dir);
931 inode->i_nlink--;
932 mark_inode_dirty(inode);
933 inode->i_ctime = dir->i_ctime;
934 retval = 0;
935
936 end_unlink:
937 if (fibh.sbh != fibh.ebh)
938 udf_release_data(fibh.ebh);
939 udf_release_data(fibh.sbh);
940 out:
941 unlock_kernel();
942 return retval;
943 }
944
945 static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * symname)
946 {
947 struct inode * inode;
948 struct pathComponent *pc;
949 char *compstart;
950 struct udf_fileident_bh fibh;
951 struct buffer_head *bh = NULL;
952 int eoffset, elen = 0;
953 struct fileIdentDesc *fi;
954 struct fileIdentDesc cfi;
955 char *ea;
956 int err;
957 int block;
958 char name[UDF_NAME_LEN];
959 int namelen;
960
961 lock_kernel();
962 if (!(inode = udf_new_inode(dir, S_IFLNK, &err)))
963 goto out;
964
965 inode->i_mode = S_IFLNK | S_IRWXUGO;
966 inode->i_data.a_ops = &udf_symlink_aops;
967 inode->i_op = &page_symlink_inode_operations;
968
969 if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB)
970 {
971 struct buffer_head *bh = NULL;
972 kernel_lb_addr bloc, eloc;
973 uint32_t elen, extoffset;
974
975 block = udf_new_block(inode->i_sb, inode,
976 UDF_I_LOCATION(inode).partitionReferenceNum,
977 UDF_I_LOCATION(inode).logicalBlockNum, &err);
978 if (!block)
979 goto out_no_entry;
980 bloc = UDF_I_LOCATION(inode);
981 eloc.logicalBlockNum = block;
982 eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
983 elen = inode->i_sb->s_blocksize;
984 UDF_I_LENEXTENTS(inode) = elen;
985 extoffset = udf_file_entry_alloc_offset(inode);
986 udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 0);
987 udf_release_data(bh);
988
989 block = udf_get_pblock(inode->i_sb, block,
990 UDF_I_LOCATION(inode).partitionReferenceNum, 0);
991 bh = udf_tread(inode->i_sb, block);
992 lock_buffer(bh);
993 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
994 set_buffer_uptodate(bh);
995 unlock_buffer(bh);
996 mark_buffer_dirty_inode(bh, inode);
997 ea = bh->b_data + udf_ext0_offset(inode);
998 }
999 else
1000 ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode);
1001
1002 eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
1003 pc = (struct pathComponent *)ea;
1004
1005 if (*symname == '/')
1006 {
1007 do
1008 {
1009 symname++;
1010 } while (*symname == '/');
1011
1012 pc->componentType = 1;
1013 pc->lengthComponentIdent = 0;
1014 pc->componentFileVersionNum = 0;
1015 pc += sizeof(struct pathComponent);
1016 elen += sizeof(struct pathComponent);
1017 }
1018
1019 err = -ENAMETOOLONG;
1020
1021 while (*symname)
1022 {
1023 if (elen + sizeof(struct pathComponent) > eoffset)
1024 goto out_no_entry;
1025
1026 pc = (struct pathComponent *)(ea + elen);
1027
1028 compstart = (char *)symname;
1029
1030 do
1031 {
1032 symname++;
1033 } while (*symname && *symname != '/');
1034
1035 pc->componentType = 5;
1036 pc->lengthComponentIdent = 0;
1037 pc->componentFileVersionNum = 0;
1038 if (compstart[0] == '.')
1039 {
1040 if ((symname-compstart) == 1)
1041 pc->componentType = 4;
1042 else if ((symname-compstart) == 2 && compstart[1] == '.')
1043 pc->componentType = 3;
1044 }
1045
1046 if (pc->componentType == 5)
1047 {
1048 if ( !(namelen = udf_put_filename(inode->i_sb, compstart, name, symname-compstart)))
1049 goto out_no_entry;
1050
1051 if (elen + sizeof(struct pathComponent) + namelen > eoffset)
1052 goto out_no_entry;
1053 else
1054 pc->lengthComponentIdent = namelen;
1055
1056 memcpy(pc->componentIdent, name, namelen);
1057 }
1058
1059 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1060
1061 if (*symname)
1062 {
1063 do
1064 {
1065 symname++;
1066 } while (*symname == '/');
1067 }
1068 }
1069
1070 udf_release_data(bh);
1071 inode->i_size = elen;
1072 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
1073 UDF_I_LENALLOC(inode) = inode->i_size;
1074 mark_inode_dirty(inode);
1075
1076 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
1077 goto out_no_entry;
1078 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1079 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
1080 if (UDF_SB_LVIDBH(inode->i_sb))
1081 {
1082 struct logicalVolHeaderDesc *lvhd;
1083 uint64_t uniqueID;
1084 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
1085 uniqueID = le64_to_cpu(lvhd->uniqueID);
1086 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1087 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1088 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1089 uniqueID += 16;
1090 lvhd->uniqueID = cpu_to_le64(uniqueID);
1091 mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
1092 }
1093 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1094 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1095 {
1096 mark_inode_dirty(dir);
1097 }
1098 if (fibh.sbh != fibh.ebh)
1099 udf_release_data(fibh.ebh);
1100 udf_release_data(fibh.sbh);
1101 d_instantiate(dentry, inode);
1102 err = 0;
1103
1104 out:
1105 unlock_kernel();
1106 return err;
1107
1108 out_no_entry:
1109 inode->i_nlink--;
1110 mark_inode_dirty(inode);
1111 iput(inode);
1112 goto out;
1113 }
1114
1115 static int udf_link(struct dentry * old_dentry, struct inode * dir,
1116 struct dentry *dentry)
1117 {
1118 struct inode *inode = old_dentry->d_inode;
1119 struct udf_fileident_bh fibh;
1120 struct fileIdentDesc cfi, *fi;
1121 int err;
1122
1123 lock_kernel();
1124 if (inode->i_nlink >= (256<<sizeof(inode->i_nlink))-1)
1125 {
1126 unlock_kernel();
1127 return -EMLINK;
1128 }
1129
1130 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
1131 {
1132 unlock_kernel();
1133 return err;
1134 }
1135 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1136 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
1137 if (UDF_SB_LVIDBH(inode->i_sb))
1138 {
1139 struct logicalVolHeaderDesc *lvhd;
1140 uint64_t uniqueID;
1141 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
1142 uniqueID = le64_to_cpu(lvhd->uniqueID);
1143 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1144 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1145 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1146 uniqueID += 16;
1147 lvhd->uniqueID = cpu_to_le64(uniqueID);
1148 mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
1149 }
1150 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1151 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1152 {
1153 mark_inode_dirty(dir);
1154 }
1155 if (fibh.sbh != fibh.ebh)
1156 udf_release_data(fibh.ebh);
1157 udf_release_data(fibh.sbh);
1158 inode->i_nlink ++;
1159 inode->i_ctime = current_fs_time(inode->i_sb);
1160 mark_inode_dirty(inode);
1161 atomic_inc(&inode->i_count);
1162 d_instantiate(dentry, inode);
1163 unlock_kernel();
1164 return 0;
1165 }
1166
1167 /* Anybody can rename anything with this: the permission checks are left to the
1168 * higher-level routines.
1169 */
1170 static int udf_rename (struct inode * old_dir, struct dentry * old_dentry,
1171 struct inode * new_dir, struct dentry * new_dentry)
1172 {
1173 struct inode * old_inode = old_dentry->d_inode;
1174 struct inode * new_inode = new_dentry->d_inode;
1175 struct udf_fileident_bh ofibh, nfibh;
1176 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi;
1177 struct buffer_head *dir_bh = NULL;
1178 int retval = -ENOENT;
1179 kernel_lb_addr tloc;
1180
1181 lock_kernel();
1182 if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi)))
1183 {
1184 if (ofibh.sbh != ofibh.ebh)
1185 udf_release_data(ofibh.ebh);
1186 udf_release_data(ofibh.sbh);
1187 }
1188 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1189 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1190 != old_inode->i_ino)
1191 goto end_rename;
1192
1193 nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1194 if (nfi)
1195 {
1196 if (!new_inode)
1197 {
1198 if (nfibh.sbh != nfibh.ebh)
1199 udf_release_data(nfibh.ebh);
1200 udf_release_data(nfibh.sbh);
1201 nfi = NULL;
1202 }
1203 }
1204 if (S_ISDIR(old_inode->i_mode))
1205 {
1206 uint32_t offset = udf_ext0_offset(old_inode);
1207
1208 if (new_inode)
1209 {
1210 retval = -ENOTEMPTY;
1211 if (!empty_dir(new_inode))
1212 goto end_rename;
1213 }
1214 retval = -EIO;
1215 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
1216 {
1217 dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) -
1218 (UDF_I_EFE(old_inode) ?
1219 sizeof(struct extendedFileEntry) :
1220 sizeof(struct fileEntry)),
1221 old_inode->i_sb->s_blocksize, &offset);
1222 }
1223 else
1224 {
1225 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1226 if (!dir_bh)
1227 goto end_rename;
1228 dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset);
1229 }
1230 if (!dir_fi)
1231 goto end_rename;
1232 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1233 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0)
1234 != old_dir->i_ino)
1235 goto end_rename;
1236
1237 retval = -EMLINK;
1238 if (!new_inode && new_dir->i_nlink >= (256<<sizeof(new_dir->i_nlink))-1)
1239 goto end_rename;
1240 }
1241 if (!nfi)
1242 {
1243 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval);
1244 if (!nfi)
1245 goto end_rename;
1246 }
1247
1248 /*
1249 * Like most other Unix systems, set the ctime for inodes on a
1250 * rename.
1251 */
1252 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1253 mark_inode_dirty(old_inode);
1254
1255 /*
1256 * ok, that's it
1257 */
1258 ncfi.fileVersionNum = ocfi.fileVersionNum;
1259 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1260 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1261 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1262
1263 /* The old fid may have moved - find it again */
1264 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1265 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1266
1267 if (new_inode)
1268 {
1269 new_inode->i_nlink--;
1270 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1271 mark_inode_dirty(new_inode);
1272 }
1273 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1274 mark_inode_dirty(old_dir);
1275
1276 if (dir_fi)
1277 {
1278 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir));
1279 udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) +
1280 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1281 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
1282 {
1283 mark_inode_dirty(old_inode);
1284 }
1285 else
1286 mark_buffer_dirty_inode(dir_bh, old_inode);
1287 old_dir->i_nlink --;
1288 mark_inode_dirty(old_dir);
1289 if (new_inode)
1290 {
1291 new_inode->i_nlink --;
1292 mark_inode_dirty(new_inode);
1293 }
1294 else
1295 {
1296 new_dir->i_nlink ++;
1297 mark_inode_dirty(new_dir);
1298 }
1299 }
1300
1301 if (ofi)
1302 {
1303 if (ofibh.sbh != ofibh.ebh)
1304 udf_release_data(ofibh.ebh);
1305 udf_release_data(ofibh.sbh);
1306 }
1307
1308 retval = 0;
1309
1310 end_rename:
1311 udf_release_data(dir_bh);
1312 if (nfi)
1313 {
1314 if (nfibh.sbh != nfibh.ebh)
1315 udf_release_data(nfibh.ebh);
1316 udf_release_data(nfibh.sbh);
1317 }
1318 unlock_kernel();
1319 return retval;
1320 }
1321
1322 struct inode_operations udf_dir_inode_operations = {
1323 .lookup = udf_lookup,
1324 .create = udf_create,
1325 .link = udf_link,
1326 .unlink = udf_unlink,
1327 .symlink = udf_symlink,
1328 .mkdir = udf_mkdir,
1329 .rmdir = udf_rmdir,
1330 .mknod = udf_mknod,
1331 .rename = udf_rename,
1332 };
linux-next