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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/udf/namei.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/udf/namei.c')
-rw-r--r--fs/udf/namei.c1334
1 files changed, 1334 insertions, 0 deletions
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
new file mode 100644
index 000000000000..3f6dc7112bc6
--- /dev/null
+++ b/fs/udf/namei.c
@@ -0,0 +1,1334 @@
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
39static 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
46int 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
150static struct fileIdentDesc *
151udf_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 = (udf_ext0_offset(dir) + dir->i_size) >> 2;
163 kernel_lb_addr bloc, eloc;
164 uint32_t extoffset, elen, offset;
165 struct buffer_head *bh = NULL;
166
167 if (!dir)
168 return NULL;
169
170 f_pos = (udf_ext0_offset(dir) >> 2);
171
172 fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
173 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
174 fibh->sbh = fibh->ebh = NULL;
175 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
176 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
177 {
178 offset >>= dir->i_sb->s_blocksize_bits;
179 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
180 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
181 {
182 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
183 extoffset -= sizeof(short_ad);
184 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
185 extoffset -= sizeof(long_ad);
186 }
187 else
188 offset = 0;
189
190 if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
191 {
192 udf_release_data(bh);
193 return NULL;
194 }
195 }
196 else
197 {
198 udf_release_data(bh);
199 return NULL;
200 }
201
202 while ( (f_pos < size) )
203 {
204 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
205
206 if (!fi)
207 {
208 if (fibh->sbh != fibh->ebh)
209 udf_release_data(fibh->ebh);
210 udf_release_data(fibh->sbh);
211 udf_release_data(bh);
212 return NULL;
213 }
214
215 liu = le16_to_cpu(cfi->lengthOfImpUse);
216 lfi = cfi->lengthFileIdent;
217
218 if (fibh->sbh == fibh->ebh)
219 {
220 nameptr = fi->fileIdent + liu;
221 }
222 else
223 {
224 int poffset; /* Unpaded ending offset */
225
226 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
227
228 if (poffset >= lfi)
229 nameptr = (uint8_t *)(fibh->ebh->b_data + poffset - lfi);
230 else
231 {
232 nameptr = fname;
233 memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
234 memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
235 }
236 }
237
238 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
239 {
240 if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) )
241 continue;
242 }
243
244 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 )
245 {
246 if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) )
247 continue;
248 }
249
250 if (!lfi)
251 continue;
252
253 if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)))
254 {
255 if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
256 {
257 udf_release_data(bh);
258 return fi;
259 }
260 }
261 }
262 if (fibh->sbh != fibh->ebh)
263 udf_release_data(fibh->ebh);
264 udf_release_data(fibh->sbh);
265 udf_release_data(bh);
266 return NULL;
267}
268
269/*
270 * udf_lookup
271 *
272 * PURPOSE
273 * Look-up the inode for a given name.
274 *
275 * DESCRIPTION
276 * Required - lookup_dentry() will return -ENOTDIR if this routine is not
277 * available for a directory. The filesystem is useless if this routine is
278 * not available for at least the filesystem's root directory.
279 *
280 * This routine is passed an incomplete dentry - it must be completed by
281 * calling d_add(dentry, inode). If the name does not exist, then the
282 * specified inode must be set to null. An error should only be returned
283 * when the lookup fails for a reason other than the name not existing.
284 * Note that the directory inode semaphore is held during the call.
285 *
286 * Refer to lookup_dentry() in fs/namei.c
287 * lookup_dentry() -> lookup() -> real_lookup() -> .
288 *
289 * PRE-CONDITIONS
290 * dir Pointer to inode of parent directory.
291 * dentry Pointer to dentry to complete.
292 * nd Pointer to lookup nameidata
293 *
294 * POST-CONDITIONS
295 * <return> Zero on success.
296 *
297 * HISTORY
298 * July 1, 1997 - Andrew E. Mileski
299 * Written, tested, and released.
300 */
301
302static struct dentry *
303udf_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
304{
305 struct inode *inode = NULL;
306 struct fileIdentDesc cfi, *fi;
307 struct udf_fileident_bh fibh;
308
309 if (dentry->d_name.len > UDF_NAME_LEN-2)
310 return ERR_PTR(-ENAMETOOLONG);
311
312 lock_kernel();
313#ifdef UDF_RECOVERY
314 /* temporary shorthand for specifying files by inode number */
315 if (!strncmp(dentry->d_name.name, ".B=", 3) )
316 {
317 kernel_lb_addr lb = { 0, simple_strtoul(dentry->d_name.name+3, NULL, 0) };
318 inode = udf_iget(dir->i_sb, lb);
319 if (!inode)
320 {
321 unlock_kernel();
322 return ERR_PTR(-EACCES);
323 }
324 }
325 else
326#endif /* UDF_RECOVERY */
327
328 if ((fi = udf_find_entry(dir, dentry, &fibh, &cfi)))
329 {
330 if (fibh.sbh != fibh.ebh)
331 udf_release_data(fibh.ebh);
332 udf_release_data(fibh.sbh);
333
334 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
335 if ( !inode )
336 {
337 unlock_kernel();
338 return ERR_PTR(-EACCES);
339 }
340 }
341 unlock_kernel();
342 d_add(dentry, inode);
343 return NULL;
344}
345
346static struct fileIdentDesc *
347udf_add_entry(struct inode *dir, struct dentry *dentry,
348 struct udf_fileident_bh *fibh,
349 struct fileIdentDesc *cfi, int *err)
350{
351 struct super_block *sb;
352 struct fileIdentDesc *fi=NULL;
353 char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
354 int namelen;
355 loff_t f_pos;
356 int flen;
357 char *nameptr;
358 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
359 int nfidlen;
360 uint8_t lfi;
361 uint16_t liu;
362 int block;
363 kernel_lb_addr bloc, eloc;
364 uint32_t extoffset, elen, offset;
365 struct buffer_head *bh = NULL;
366
367 sb = dir->i_sb;
368
369 if (dentry)
370 {
371 if (!dentry->d_name.len)
372 {
373 *err = -EINVAL;
374 return NULL;
375 }
376
377 if ( !(namelen = udf_put_filename(sb, dentry->d_name.name, name, dentry->d_name.len)))
378 {
379 *err = -ENAMETOOLONG;
380 return NULL;
381 }
382 }
383 else
384 namelen = 0;
385
386 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
387
388 f_pos = (udf_ext0_offset(dir) >> 2);
389
390 fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
391 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
392 fibh->sbh = fibh->ebh = NULL;
393 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
394 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
395 {
396 offset >>= dir->i_sb->s_blocksize_bits;
397 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
398 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
399 {
400 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
401 extoffset -= sizeof(short_ad);
402 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
403 extoffset -= sizeof(long_ad);
404 }
405 else
406 offset = 0;
407
408 if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
409 {
410 udf_release_data(bh);
411 *err = -EIO;
412 return NULL;
413 }
414
415 block = UDF_I_LOCATION(dir).logicalBlockNum;
416
417 }
418 else
419 {
420 block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0);
421 fibh->sbh = fibh->ebh = NULL;
422 fibh->soffset = fibh->eoffset = sb->s_blocksize;
423 goto add;
424 }
425
426 while ( (f_pos < size) )
427 {
428 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
429
430 if (!fi)
431 {
432 if (fibh->sbh != fibh->ebh)
433 udf_release_data(fibh->ebh);
434 udf_release_data(fibh->sbh);
435 udf_release_data(bh);
436 *err = -EIO;
437 return NULL;
438 }
439
440 liu = le16_to_cpu(cfi->lengthOfImpUse);
441 lfi = cfi->lengthFileIdent;
442
443 if (fibh->sbh == fibh->ebh)
444 nameptr = fi->fileIdent + liu;
445 else
446 {
447 int poffset; /* Unpaded ending offset */
448
449 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
450
451 if (poffset >= lfi)
452 nameptr = (char *)(fibh->ebh->b_data + poffset - lfi);
453 else
454 {
455 nameptr = fname;
456 memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
457 memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
458 }
459 }
460
461 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
462 {
463 if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen)
464 {
465 udf_release_data(bh);
466 cfi->descTag.tagSerialNum = cpu_to_le16(1);
467 cfi->fileVersionNum = cpu_to_le16(1);
468 cfi->fileCharacteristics = 0;
469 cfi->lengthFileIdent = namelen;
470 cfi->lengthOfImpUse = cpu_to_le16(0);
471 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
472 return fi;
473 else
474 {
475 *err = -EIO;
476 return NULL;
477 }
478 }
479 }
480
481 if (!lfi || !dentry)
482 continue;
483
484 if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) &&
485 udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
486 {
487 if (fibh->sbh != fibh->ebh)
488 udf_release_data(fibh->ebh);
489 udf_release_data(fibh->sbh);
490 udf_release_data(bh);
491 *err = -EEXIST;
492 return NULL;
493 }
494 }
495
496add:
497 f_pos += nfidlen;
498
499 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB &&
500 sb->s_blocksize - fibh->eoffset < nfidlen)
501 {
502 udf_release_data(bh);
503 bh = NULL;
504 fibh->soffset -= udf_ext0_offset(dir);
505 fibh->eoffset -= udf_ext0_offset(dir);
506 f_pos -= (udf_ext0_offset(dir) >> 2);
507 if (fibh->sbh != fibh->ebh)
508 udf_release_data(fibh->ebh);
509 udf_release_data(fibh->sbh);
510 if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err)))
511 return NULL;
512 bloc = UDF_I_LOCATION(dir);
513 eloc.logicalBlockNum = block;
514 eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;
515 elen = dir->i_sb->s_blocksize;
516 extoffset = udf_file_entry_alloc_offset(dir);
517 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
518 extoffset += sizeof(short_ad);
519 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
520 extoffset += sizeof(long_ad);
521 }
522
523 if (sb->s_blocksize - fibh->eoffset >= nfidlen)
524 {
525 fibh->soffset = fibh->eoffset;
526 fibh->eoffset += nfidlen;
527 if (fibh->sbh != fibh->ebh)
528 {
529 udf_release_data(fibh->sbh);
530 fibh->sbh = fibh->ebh;
531 }
532
533 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
534 {
535 block = UDF_I_LOCATION(dir).logicalBlockNum;
536 fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - udf_ext0_offset(dir) + UDF_I_LENEATTR(dir));
537 }
538 else
539 {
540 block = eloc.logicalBlockNum + ((elen - 1) >>
541 dir->i_sb->s_blocksize_bits);
542 fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset);
543 }
544 }
545 else
546 {
547 fibh->soffset = fibh->eoffset - sb->s_blocksize;
548 fibh->eoffset += nfidlen - sb->s_blocksize;
549 if (fibh->sbh != fibh->ebh)
550 {
551 udf_release_data(fibh->sbh);
552 fibh->sbh = fibh->ebh;
553 }
554
555 block = eloc.logicalBlockNum + ((elen - 1) >>
556 dir->i_sb->s_blocksize_bits);
557
558 if (!(fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err)))
559 {
560 udf_release_data(bh);
561 udf_release_data(fibh->sbh);
562 return NULL;
563 }
564
565 if (!(fibh->soffset))
566 {
567 if (udf_next_aext(dir, &bloc, &extoffset, &eloc, &elen, &bh, 1) ==
568 (EXT_RECORDED_ALLOCATED >> 30))
569 {
570 block = eloc.logicalBlockNum + ((elen - 1) >>
571 dir->i_sb->s_blocksize_bits);
572 }
573 else
574 block ++;
575
576 udf_release_data(fibh->sbh);
577 fibh->sbh = fibh->ebh;
578 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
579 }
580 else
581 {
582 fi = (struct fileIdentDesc *)
583 (fibh->sbh->b_data + sb->s_blocksize + fibh->soffset);
584 }
585 }
586
587 memset(cfi, 0, sizeof(struct fileIdentDesc));
588 if (UDF_SB_UDFREV(sb) >= 0x0200)
589 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag));
590 else
591 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag));
592 cfi->fileVersionNum = cpu_to_le16(1);
593 cfi->lengthFileIdent = namelen;
594 cfi->lengthOfImpUse = cpu_to_le16(0);
595 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
596 {
597 udf_release_data(bh);
598 dir->i_size += nfidlen;
599 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
600 UDF_I_LENALLOC(dir) += nfidlen;
601 mark_inode_dirty(dir);
602 return fi;
603 }
604 else
605 {
606 udf_release_data(bh);
607 if (fibh->sbh != fibh->ebh)
608 udf_release_data(fibh->ebh);
609 udf_release_data(fibh->sbh);
610 *err = -EIO;
611 return NULL;
612 }
613}
614
615static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
616 struct udf_fileident_bh *fibh, struct fileIdentDesc *cfi)
617{
618 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
619 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
620 memset(&(cfi->icb), 0x00, sizeof(long_ad));
621 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
622}
623
624static int udf_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
625{
626 struct udf_fileident_bh fibh;
627 struct inode *inode;
628 struct fileIdentDesc cfi, *fi;
629 int err;
630
631 lock_kernel();
632 inode = udf_new_inode(dir, mode, &err);
633 if (!inode)
634 {
635 unlock_kernel();
636 return err;
637 }
638
639 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
640 inode->i_data.a_ops = &udf_adinicb_aops;
641 else
642 inode->i_data.a_ops = &udf_aops;
643 inode->i_op = &udf_file_inode_operations;
644 inode->i_fop = &udf_file_operations;
645 inode->i_mode = mode;
646 mark_inode_dirty(inode);
647
648 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
649 {
650 inode->i_nlink --;
651 mark_inode_dirty(inode);
652 iput(inode);
653 unlock_kernel();
654 return err;
655 }
656 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
657 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
658 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
659 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
660 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
661 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
662 {
663 mark_inode_dirty(dir);
664 }
665 if (fibh.sbh != fibh.ebh)
666 udf_release_data(fibh.ebh);
667 udf_release_data(fibh.sbh);
668 unlock_kernel();
669 d_instantiate(dentry, inode);
670 return 0;
671}
672
673static int udf_mknod(struct inode * dir, struct dentry * dentry, int mode, dev_t rdev)
674{
675 struct inode * inode;
676 struct udf_fileident_bh fibh;
677 struct fileIdentDesc cfi, *fi;
678 int err;
679
680 if (!old_valid_dev(rdev))
681 return -EINVAL;
682
683 lock_kernel();
684 err = -EIO;
685 inode = udf_new_inode(dir, mode, &err);
686 if (!inode)
687 goto out;
688
689 inode->i_uid = current->fsuid;
690 init_special_inode(inode, mode, rdev);
691 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
692 {
693 inode->i_nlink --;
694 mark_inode_dirty(inode);
695 iput(inode);
696 unlock_kernel();
697 return err;
698 }
699 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
700 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
701 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
702 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
703 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
704 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
705 {
706 mark_inode_dirty(dir);
707 }
708 mark_inode_dirty(inode);
709
710 if (fibh.sbh != fibh.ebh)
711 udf_release_data(fibh.ebh);
712 udf_release_data(fibh.sbh);
713 d_instantiate(dentry, inode);
714 err = 0;
715out:
716 unlock_kernel();
717 return err;
718}
719
720static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode)
721{
722 struct inode * inode;
723 struct udf_fileident_bh fibh;
724 struct fileIdentDesc cfi, *fi;
725 int err;
726
727 lock_kernel();
728 err = -EMLINK;
729 if (dir->i_nlink >= (256<<sizeof(dir->i_nlink))-1)
730 goto out;
731
732 err = -EIO;
733 inode = udf_new_inode(dir, S_IFDIR, &err);
734 if (!inode)
735 goto out;
736
737 inode->i_op = &udf_dir_inode_operations;
738 inode->i_fop = &udf_dir_operations;
739 if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err)))
740 {
741 inode->i_nlink--;
742 mark_inode_dirty(inode);
743 iput(inode);
744 goto out;
745 }
746 inode->i_nlink = 2;
747 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
748 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir));
749 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
750 cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL);
751 cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
752 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
753 udf_release_data(fibh.sbh);
754 inode->i_mode = S_IFDIR | mode;
755 if (dir->i_mode & S_ISGID)
756 inode->i_mode |= S_ISGID;
757 mark_inode_dirty(inode);
758
759 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
760 {
761 inode->i_nlink = 0;
762 mark_inode_dirty(inode);
763 iput(inode);
764 goto out;
765 }
766 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
767 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
768 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
769 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
770 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
771 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
772 dir->i_nlink++;
773 mark_inode_dirty(dir);
774 d_instantiate(dentry, inode);
775 if (fibh.sbh != fibh.ebh)
776 udf_release_data(fibh.ebh);
777 udf_release_data(fibh.sbh);
778 err = 0;
779out:
780 unlock_kernel();
781 return err;
782}
783
784static int empty_dir(struct inode *dir)
785{
786 struct fileIdentDesc *fi, cfi;
787 struct udf_fileident_bh fibh;
788 loff_t f_pos;
789 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
790 int block;
791 kernel_lb_addr bloc, eloc;
792 uint32_t extoffset, elen, offset;
793 struct buffer_head *bh = NULL;
794
795 f_pos = (udf_ext0_offset(dir) >> 2);
796
797 fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
798
799 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
800 fibh.sbh = fibh.ebh = NULL;
801 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
802 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
803 {
804 offset >>= dir->i_sb->s_blocksize_bits;
805 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
806 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
807 {
808 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
809 extoffset -= sizeof(short_ad);
810 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
811 extoffset -= sizeof(long_ad);
812 }
813 else
814 offset = 0;
815
816 if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block)))
817 {
818 udf_release_data(bh);
819 return 0;
820 }
821 }
822 else
823 {
824 udf_release_data(bh);
825 return 0;
826 }
827
828
829 while ( (f_pos < size) )
830 {
831 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
832
833 if (!fi)
834 {
835 if (fibh.sbh != fibh.ebh)
836 udf_release_data(fibh.ebh);
837 udf_release_data(fibh.sbh);
838 udf_release_data(bh);
839 return 0;
840 }
841
842 if (cfi.lengthFileIdent && (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0)
843 {
844 if (fibh.sbh != fibh.ebh)
845 udf_release_data(fibh.ebh);
846 udf_release_data(fibh.sbh);
847 udf_release_data(bh);
848 return 0;
849 }
850 }
851 if (fibh.sbh != fibh.ebh)
852 udf_release_data(fibh.ebh);
853 udf_release_data(fibh.sbh);
854 udf_release_data(bh);
855 return 1;
856}
857
858static int udf_rmdir(struct inode * dir, struct dentry * dentry)
859{
860 int retval;
861 struct inode * inode = dentry->d_inode;
862 struct udf_fileident_bh fibh;
863 struct fileIdentDesc *fi, cfi;
864 kernel_lb_addr tloc;
865
866 retval = -ENOENT;
867 lock_kernel();
868 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
869 if (!fi)
870 goto out;
871
872 retval = -EIO;
873 tloc = lelb_to_cpu(cfi.icb.extLocation);
874 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
875 goto end_rmdir;
876 retval = -ENOTEMPTY;
877 if (!empty_dir(inode))
878 goto end_rmdir;
879 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
880 if (retval)
881 goto end_rmdir;
882 if (inode->i_nlink != 2)
883 udf_warning(inode->i_sb, "udf_rmdir",
884 "empty directory has nlink != 2 (%d)",
885 inode->i_nlink);
886 inode->i_nlink = 0;
887 inode->i_size = 0;
888 mark_inode_dirty(inode);
889 dir->i_nlink --;
890 inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
891 mark_inode_dirty(dir);
892
893end_rmdir:
894 if (fibh.sbh != fibh.ebh)
895 udf_release_data(fibh.ebh);
896 udf_release_data(fibh.sbh);
897out:
898 unlock_kernel();
899 return retval;
900}
901
902static int udf_unlink(struct inode * dir, struct dentry * dentry)
903{
904 int retval;
905 struct inode * inode = dentry->d_inode;
906 struct udf_fileident_bh fibh;
907 struct fileIdentDesc *fi;
908 struct fileIdentDesc cfi;
909 kernel_lb_addr tloc;
910
911 retval = -ENOENT;
912 lock_kernel();
913 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
914 if (!fi)
915 goto out;
916
917 retval = -EIO;
918 tloc = lelb_to_cpu(cfi.icb.extLocation);
919 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
920 goto end_unlink;
921
922 if (!inode->i_nlink)
923 {
924 udf_debug("Deleting nonexistent file (%lu), %d\n",
925 inode->i_ino, inode->i_nlink);
926 inode->i_nlink = 1;
927 }
928 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
929 if (retval)
930 goto end_unlink;
931 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
932 mark_inode_dirty(dir);
933 inode->i_nlink--;
934 mark_inode_dirty(inode);
935 inode->i_ctime = dir->i_ctime;
936 retval = 0;
937
938end_unlink:
939 if (fibh.sbh != fibh.ebh)
940 udf_release_data(fibh.ebh);
941 udf_release_data(fibh.sbh);
942out:
943 unlock_kernel();
944 return retval;
945}
946
947static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * symname)
948{
949 struct inode * inode;
950 struct pathComponent *pc;
951 char *compstart;
952 struct udf_fileident_bh fibh;
953 struct buffer_head *bh = NULL;
954 int eoffset, elen = 0;
955 struct fileIdentDesc *fi;
956 struct fileIdentDesc cfi;
957 char *ea;
958 int err;
959 int block;
960 char name[UDF_NAME_LEN];
961 int namelen;
962
963 lock_kernel();
964 if (!(inode = udf_new_inode(dir, S_IFLNK, &err)))
965 goto out;
966
967 inode->i_mode = S_IFLNK | S_IRWXUGO;
968 inode->i_data.a_ops = &udf_symlink_aops;
969 inode->i_op = &page_symlink_inode_operations;
970
971 if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB)
972 {
973 struct buffer_head *bh = NULL;
974 kernel_lb_addr bloc, eloc;
975 uint32_t elen, extoffset;
976
977 block = udf_new_block(inode->i_sb, inode,
978 UDF_I_LOCATION(inode).partitionReferenceNum,
979 UDF_I_LOCATION(inode).logicalBlockNum, &err);
980 if (!block)
981 goto out_no_entry;
982 bloc = UDF_I_LOCATION(inode);
983 eloc.logicalBlockNum = block;
984 eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
985 elen = inode->i_sb->s_blocksize;
986 UDF_I_LENEXTENTS(inode) = elen;
987 extoffset = udf_file_entry_alloc_offset(inode);
988 udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 0);
989 udf_release_data(bh);
990
991 block = udf_get_pblock(inode->i_sb, block,
992 UDF_I_LOCATION(inode).partitionReferenceNum, 0);
993 bh = udf_tread(inode->i_sb, block);
994 lock_buffer(bh);
995 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
996 set_buffer_uptodate(bh);
997 unlock_buffer(bh);
998 mark_buffer_dirty_inode(bh, inode);
999 ea = bh->b_data + udf_ext0_offset(inode);
1000 }
1001 else
1002 ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode);
1003
1004 eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
1005 pc = (struct pathComponent *)ea;
1006
1007 if (*symname == '/')
1008 {
1009 do
1010 {
1011 symname++;
1012 } while (*symname == '/');
1013
1014 pc->componentType = 1;
1015 pc->lengthComponentIdent = 0;
1016 pc->componentFileVersionNum = 0;
1017 pc += sizeof(struct pathComponent);
1018 elen += sizeof(struct pathComponent);
1019 }
1020
1021 err = -ENAMETOOLONG;
1022
1023 while (*symname)
1024 {
1025 if (elen + sizeof(struct pathComponent) > eoffset)
1026 goto out_no_entry;
1027
1028 pc = (struct pathComponent *)(ea + elen);
1029
1030 compstart = (char *)symname;
1031
1032 do
1033 {
1034 symname++;
1035 } while (*symname && *symname != '/');
1036
1037 pc->componentType = 5;
1038 pc->lengthComponentIdent = 0;
1039 pc->componentFileVersionNum = 0;
1040 if (compstart[0] == '.')
1041 {
1042 if ((symname-compstart) == 1)
1043 pc->componentType = 4;
1044 else if ((symname-compstart) == 2 && compstart[1] == '.')
1045 pc->componentType = 3;
1046 }
1047
1048 if (pc->componentType == 5)
1049 {
1050 if ( !(namelen = udf_put_filename(inode->i_sb, compstart, name, symname-compstart)))
1051 goto out_no_entry;
1052
1053 if (elen + sizeof(struct pathComponent) + namelen > eoffset)
1054 goto out_no_entry;
1055 else
1056 pc->lengthComponentIdent = namelen;
1057
1058 memcpy(pc->componentIdent, name, namelen);
1059 }
1060
1061 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1062
1063 if (*symname)
1064 {
1065 do
1066 {
1067 symname++;
1068 } while (*symname == '/');
1069 }
1070 }
1071
1072 udf_release_data(bh);
1073 inode->i_size = elen;
1074 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
1075 UDF_I_LENALLOC(inode) = inode->i_size;
1076 mark_inode_dirty(inode);
1077
1078 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
1079 goto out_no_entry;
1080 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1081 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
1082 if (UDF_SB_LVIDBH(inode->i_sb))
1083 {
1084 struct logicalVolHeaderDesc *lvhd;
1085 uint64_t uniqueID;
1086 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
1087 uniqueID = le64_to_cpu(lvhd->uniqueID);
1088 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1089 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1090 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1091 uniqueID += 16;
1092 lvhd->uniqueID = cpu_to_le64(uniqueID);
1093 mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
1094 }
1095 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1096 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1097 {
1098 mark_inode_dirty(dir);
1099 }
1100 if (fibh.sbh != fibh.ebh)
1101 udf_release_data(fibh.ebh);
1102 udf_release_data(fibh.sbh);
1103 d_instantiate(dentry, inode);
1104 err = 0;
1105
1106out:
1107 unlock_kernel();
1108 return err;
1109
1110out_no_entry:
1111 inode->i_nlink--;
1112 mark_inode_dirty(inode);
1113 iput(inode);
1114 goto out;
1115}
1116
1117static int udf_link(struct dentry * old_dentry, struct inode * dir,
1118 struct dentry *dentry)
1119{
1120 struct inode *inode = old_dentry->d_inode;
1121 struct udf_fileident_bh fibh;
1122 struct fileIdentDesc cfi, *fi;
1123 int err;
1124
1125 lock_kernel();
1126 if (inode->i_nlink >= (256<<sizeof(inode->i_nlink))-1)
1127 {
1128 unlock_kernel();
1129 return -EMLINK;
1130 }
1131
1132 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
1133 {
1134 unlock_kernel();
1135 return err;
1136 }
1137 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1138 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
1139 if (UDF_SB_LVIDBH(inode->i_sb))
1140 {
1141 struct logicalVolHeaderDesc *lvhd;
1142 uint64_t uniqueID;
1143 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
1144 uniqueID = le64_to_cpu(lvhd->uniqueID);
1145 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1146 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1147 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1148 uniqueID += 16;
1149 lvhd->uniqueID = cpu_to_le64(uniqueID);
1150 mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
1151 }
1152 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1153 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1154 {
1155 mark_inode_dirty(dir);
1156 }
1157 if (fibh.sbh != fibh.ebh)
1158 udf_release_data(fibh.ebh);
1159 udf_release_data(fibh.sbh);
1160 inode->i_nlink ++;
1161 inode->i_ctime = current_fs_time(inode->i_sb);
1162 mark_inode_dirty(inode);
1163 atomic_inc(&inode->i_count);
1164 d_instantiate(dentry, inode);
1165 unlock_kernel();
1166 return 0;
1167}
1168
1169/* Anybody can rename anything with this: the permission checks are left to the
1170 * higher-level routines.
1171 */
1172static int udf_rename (struct inode * old_dir, struct dentry * old_dentry,
1173 struct inode * new_dir, struct dentry * new_dentry)
1174{
1175 struct inode * old_inode = old_dentry->d_inode;
1176 struct inode * new_inode = new_dentry->d_inode;
1177 struct udf_fileident_bh ofibh, nfibh;
1178 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi;
1179 struct buffer_head *dir_bh = NULL;
1180 int retval = -ENOENT;
1181 kernel_lb_addr tloc;
1182
1183 lock_kernel();
1184 if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi)))
1185 {
1186 if (ofibh.sbh != ofibh.ebh)
1187 udf_release_data(ofibh.ebh);
1188 udf_release_data(ofibh.sbh);
1189 }
1190 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1191 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1192 != old_inode->i_ino)
1193 goto end_rename;
1194
1195 nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1196 if (nfi)
1197 {
1198 if (!new_inode)
1199 {
1200 if (nfibh.sbh != nfibh.ebh)
1201 udf_release_data(nfibh.ebh);
1202 udf_release_data(nfibh.sbh);
1203 nfi = NULL;
1204 }
1205 }
1206 if (S_ISDIR(old_inode->i_mode))
1207 {
1208 uint32_t offset = udf_ext0_offset(old_inode);
1209
1210 if (new_inode)
1211 {
1212 retval = -ENOTEMPTY;
1213 if (!empty_dir(new_inode))
1214 goto end_rename;
1215 }
1216 retval = -EIO;
1217 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
1218 {
1219 dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) -
1220 (UDF_I_EFE(old_inode) ?
1221 sizeof(struct extendedFileEntry) :
1222 sizeof(struct fileEntry)),
1223 old_inode->i_sb->s_blocksize, &offset);
1224 }
1225 else
1226 {
1227 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1228 if (!dir_bh)
1229 goto end_rename;
1230 dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset);
1231 }
1232 if (!dir_fi)
1233 goto end_rename;
1234 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1235 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0)
1236 != old_dir->i_ino)
1237 goto end_rename;
1238
1239 retval = -EMLINK;
1240 if (!new_inode && new_dir->i_nlink >= (256<<sizeof(new_dir->i_nlink))-1)
1241 goto end_rename;
1242 }
1243 if (!nfi)
1244 {
1245 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval);
1246 if (!nfi)
1247 goto end_rename;
1248 }
1249
1250 /*
1251 * Like most other Unix systems, set the ctime for inodes on a
1252 * rename.
1253 */
1254 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1255 mark_inode_dirty(old_inode);
1256
1257 /*
1258 * ok, that's it
1259 */
1260 ncfi.fileVersionNum = ocfi.fileVersionNum;
1261 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1262 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1263 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1264
1265 /* The old fid may have moved - find it again */
1266 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1267 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1268
1269 if (new_inode)
1270 {
1271 new_inode->i_nlink--;
1272 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1273 mark_inode_dirty(new_inode);
1274 }
1275 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1276 mark_inode_dirty(old_dir);
1277
1278 if (dir_fi)
1279 {
1280 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir));
1281 udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) +
1282 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1283 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
1284 {
1285 mark_inode_dirty(old_inode);
1286 }
1287 else
1288 mark_buffer_dirty_inode(dir_bh, old_inode);
1289 old_dir->i_nlink --;
1290 mark_inode_dirty(old_dir);
1291 if (new_inode)
1292 {
1293 new_inode->i_nlink --;
1294 mark_inode_dirty(new_inode);
1295 }
1296 else
1297 {
1298 new_dir->i_nlink ++;
1299 mark_inode_dirty(new_dir);
1300 }
1301 }
1302
1303 if (ofi)
1304 {
1305 if (ofibh.sbh != ofibh.ebh)
1306 udf_release_data(ofibh.ebh);
1307 udf_release_data(ofibh.sbh);
1308 }
1309
1310 retval = 0;
1311
1312end_rename:
1313 udf_release_data(dir_bh);
1314 if (nfi)
1315 {
1316 if (nfibh.sbh != nfibh.ebh)
1317 udf_release_data(nfibh.ebh);
1318 udf_release_data(nfibh.sbh);
1319 }
1320 unlock_kernel();
1321 return retval;
1322}
1323
1324struct inode_operations udf_dir_inode_operations = {
1325 .lookup = udf_lookup,
1326 .create = udf_create,
1327 .link = udf_link,
1328 .unlink = udf_unlink,
1329 .symlink = udf_symlink,
1330 .mkdir = udf_mkdir,
1331 .rmdir = udf_rmdir,
1332 .mknod = udf_mknod,
1333 .rename = udf_rename,
1334};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 23:15:37 -0500