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Merge tag 'tiny/no-advice-fixup-3.18' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-bionic-kernel.git] / fs / udf / namei.c
1 /*
2 * namei.c
3 *
4 * PURPOSE
5 * Inode name handling routines for the OSTA-UDF(tm) filesystem.
6 *
7 * COPYRIGHT
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
12 *
13 * (C) 1998-2004 Ben Fennema
14 * (C) 1999-2000 Stelias Computing Inc
15 *
16 * HISTORY
17 *
18 * 12/12/98 blf Created. Split out the lookup code from dir.c
19 * 04/19/99 blf link, mknod, symlink support
20 */
21
22 #include "udfdecl.h"
23
24 #include "udf_i.h"
25 #include "udf_sb.h"
26 #include <linux/string.h>
27 #include <linux/errno.h>
28 #include <linux/mm.h>
29 #include <linux/slab.h>
30 #include <linux/buffer_head.h>
31 #include <linux/sched.h>
32 #include <linux/crc-itu-t.h>
33 #include <linux/exportfs.h>
34
35 static inline int udf_match(int len1, const unsigned char *name1, int len2,
36 const unsigned 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(struct 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(inode)->i_alloc_type == 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 = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
101 sizeof(struct fileIdentDesc) - sizeof(struct tag));
102
103 if (fibh->sbh == fibh->ebh) {
104 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
105 crclen + sizeof(struct tag) -
106 sizeof(struct fileIdentDesc));
107 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
108 crc = crc_itu_t(crc, fibh->ebh->b_data +
109 sizeof(struct fileIdentDesc) +
110 fibh->soffset,
111 crclen + sizeof(struct tag) -
112 sizeof(struct fileIdentDesc));
113 } else {
114 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
115 -fibh->soffset - sizeof(struct fileIdentDesc));
116 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
117 }
118
119 cfi->descTag.descCRC = cpu_to_le16(crc);
120 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
121 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
122
123 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
124 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
125 sizeof(struct fileIdentDesc));
126 } else {
127 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
128 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
129 sizeof(struct fileIdentDesc) + fibh->soffset);
130 }
131
132 if (adinicb) {
133 mark_inode_dirty(inode);
134 } else {
135 if (fibh->sbh != fibh->ebh)
136 mark_buffer_dirty_inode(fibh->ebh, inode);
137 mark_buffer_dirty_inode(fibh->sbh, inode);
138 }
139 return 0;
140 }
141
142 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
143 const struct qstr *child,
144 struct udf_fileident_bh *fibh,
145 struct fileIdentDesc *cfi)
146 {
147 struct fileIdentDesc *fi = NULL;
148 loff_t f_pos;
149 int block, flen;
150 unsigned char *fname = NULL;
151 unsigned char *nameptr;
152 uint8_t lfi;
153 uint16_t liu;
154 loff_t size;
155 struct kernel_lb_addr eloc;
156 uint32_t elen;
157 sector_t offset;
158 struct extent_position epos = {};
159 struct udf_inode_info *dinfo = UDF_I(dir);
160 int isdotdot = child->len == 2 &&
161 child->name[0] == '.' && child->name[1] == '.';
162
163 size = udf_ext0_offset(dir) + dir->i_size;
164 f_pos = udf_ext0_offset(dir);
165
166 fibh->sbh = fibh->ebh = NULL;
167 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
168 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
169 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
170 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
171 goto out_err;
172 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
173 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
174 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
175 epos.offset -= sizeof(struct short_ad);
176 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
177 epos.offset -= sizeof(struct long_ad);
178 } else
179 offset = 0;
180
181 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
182 if (!fibh->sbh)
183 goto out_err;
184 }
185
186 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
187 if (!fname)
188 goto out_err;
189
190 while (f_pos < size) {
191 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
192 &elen, &offset);
193 if (!fi)
194 goto out_err;
195
196 liu = le16_to_cpu(cfi->lengthOfImpUse);
197 lfi = cfi->lengthFileIdent;
198
199 if (fibh->sbh == fibh->ebh) {
200 nameptr = fi->fileIdent + liu;
201 } else {
202 int poffset; /* Unpaded ending offset */
203
204 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
205 liu + lfi;
206
207 if (poffset >= lfi)
208 nameptr = (uint8_t *)(fibh->ebh->b_data +
209 poffset - lfi);
210 else {
211 nameptr = fname;
212 memcpy(nameptr, fi->fileIdent + liu,
213 lfi - poffset);
214 memcpy(nameptr + lfi - poffset,
215 fibh->ebh->b_data, poffset);
216 }
217 }
218
219 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
220 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
221 continue;
222 }
223
224 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
225 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
226 continue;
227 }
228
229 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
230 isdotdot)
231 goto out_ok;
232
233 if (!lfi)
234 continue;
235
236 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
237 if (flen && udf_match(flen, fname, child->len, child->name))
238 goto out_ok;
239 }
240
241 out_err:
242 fi = NULL;
243 if (fibh->sbh != fibh->ebh)
244 brelse(fibh->ebh);
245 brelse(fibh->sbh);
246 out_ok:
247 brelse(epos.bh);
248 kfree(fname);
249
250 return fi;
251 }
252
253 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
254 unsigned int flags)
255 {
256 struct inode *inode = NULL;
257 struct fileIdentDesc cfi;
258 struct udf_fileident_bh fibh;
259
260 if (dentry->d_name.len > UDF_NAME_LEN - 2)
261 return ERR_PTR(-ENAMETOOLONG);
262
263 #ifdef UDF_RECOVERY
264 /* temporary shorthand for specifying files by inode number */
265 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
266 struct kernel_lb_addr lb = {
267 .logicalBlockNum = 0,
268 .partitionReferenceNum =
269 simple_strtoul(dentry->d_name.name + 3,
270 NULL, 0),
271 };
272 inode = udf_iget(dir->i_sb, lb);
273 if (IS_ERR(inode))
274 return inode;
275 } else
276 #endif /* UDF_RECOVERY */
277
278 if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
279 struct kernel_lb_addr loc;
280
281 if (fibh.sbh != fibh.ebh)
282 brelse(fibh.ebh);
283 brelse(fibh.sbh);
284
285 loc = lelb_to_cpu(cfi.icb.extLocation);
286 inode = udf_iget(dir->i_sb, &loc);
287 if (IS_ERR(inode))
288 return ERR_CAST(inode);
289 }
290
291 return d_splice_alias(inode, dentry);
292 }
293
294 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
295 struct dentry *dentry,
296 struct udf_fileident_bh *fibh,
297 struct fileIdentDesc *cfi, int *err)
298 {
299 struct super_block *sb = dir->i_sb;
300 struct fileIdentDesc *fi = NULL;
301 unsigned char *name = NULL;
302 int namelen;
303 loff_t f_pos;
304 loff_t size = udf_ext0_offset(dir) + dir->i_size;
305 int nfidlen;
306 uint8_t lfi;
307 uint16_t liu;
308 int block;
309 struct kernel_lb_addr eloc;
310 uint32_t elen = 0;
311 sector_t offset;
312 struct extent_position epos = {};
313 struct udf_inode_info *dinfo;
314
315 fibh->sbh = fibh->ebh = NULL;
316 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
317 if (!name) {
318 *err = -ENOMEM;
319 goto out_err;
320 }
321
322 if (dentry) {
323 if (!dentry->d_name.len) {
324 *err = -EINVAL;
325 goto out_err;
326 }
327 namelen = udf_put_filename(sb, dentry->d_name.name, name,
328 dentry->d_name.len);
329 if (!namelen) {
330 *err = -ENAMETOOLONG;
331 goto out_err;
332 }
333 } else {
334 namelen = 0;
335 }
336
337 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
338
339 f_pos = udf_ext0_offset(dir);
340
341 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
342 dinfo = UDF_I(dir);
343 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
344 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
345 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
346 block = udf_get_lb_pblock(dir->i_sb,
347 &dinfo->i_location, 0);
348 fibh->soffset = fibh->eoffset = sb->s_blocksize;
349 goto add;
350 }
351 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
352 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
353 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
354 epos.offset -= sizeof(struct short_ad);
355 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
356 epos.offset -= sizeof(struct long_ad);
357 } else
358 offset = 0;
359
360 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
361 if (!fibh->sbh) {
362 *err = -EIO;
363 goto out_err;
364 }
365
366 block = dinfo->i_location.logicalBlockNum;
367 }
368
369 while (f_pos < size) {
370 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
371 &elen, &offset);
372
373 if (!fi) {
374 *err = -EIO;
375 goto out_err;
376 }
377
378 liu = le16_to_cpu(cfi->lengthOfImpUse);
379 lfi = cfi->lengthFileIdent;
380
381 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
382 if (((sizeof(struct fileIdentDesc) +
383 liu + lfi + 3) & ~3) == nfidlen) {
384 cfi->descTag.tagSerialNum = cpu_to_le16(1);
385 cfi->fileVersionNum = cpu_to_le16(1);
386 cfi->fileCharacteristics = 0;
387 cfi->lengthFileIdent = namelen;
388 cfi->lengthOfImpUse = cpu_to_le16(0);
389 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
390 name))
391 goto out_ok;
392 else {
393 *err = -EIO;
394 goto out_err;
395 }
396 }
397 }
398 }
399
400 add:
401 f_pos += nfidlen;
402
403 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
404 sb->s_blocksize - fibh->eoffset < nfidlen) {
405 brelse(epos.bh);
406 epos.bh = NULL;
407 fibh->soffset -= udf_ext0_offset(dir);
408 fibh->eoffset -= udf_ext0_offset(dir);
409 f_pos -= udf_ext0_offset(dir);
410 if (fibh->sbh != fibh->ebh)
411 brelse(fibh->ebh);
412 brelse(fibh->sbh);
413 fibh->sbh = fibh->ebh =
414 udf_expand_dir_adinicb(dir, &block, err);
415 if (!fibh->sbh)
416 goto out_err;
417 epos.block = dinfo->i_location;
418 epos.offset = udf_file_entry_alloc_offset(dir);
419 /* Load extent udf_expand_dir_adinicb() has created */
420 udf_current_aext(dir, &epos, &eloc, &elen, 1);
421 }
422
423 /* Entry fits into current block? */
424 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
425 fibh->soffset = fibh->eoffset;
426 fibh->eoffset += nfidlen;
427 if (fibh->sbh != fibh->ebh) {
428 brelse(fibh->sbh);
429 fibh->sbh = fibh->ebh;
430 }
431
432 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
433 block = dinfo->i_location.logicalBlockNum;
434 fi = (struct fileIdentDesc *)
435 (dinfo->i_ext.i_data +
436 fibh->soffset -
437 udf_ext0_offset(dir) +
438 dinfo->i_lenEAttr);
439 } else {
440 block = eloc.logicalBlockNum +
441 ((elen - 1) >>
442 dir->i_sb->s_blocksize_bits);
443 fi = (struct fileIdentDesc *)
444 (fibh->sbh->b_data + fibh->soffset);
445 }
446 } else {
447 /* Round up last extent in the file */
448 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
449 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
450 epos.offset -= sizeof(struct short_ad);
451 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
452 epos.offset -= sizeof(struct long_ad);
453 udf_write_aext(dir, &epos, &eloc, elen, 1);
454 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
455 - 1) & ~(sb->s_blocksize - 1);
456
457 fibh->soffset = fibh->eoffset - sb->s_blocksize;
458 fibh->eoffset += nfidlen - sb->s_blocksize;
459 if (fibh->sbh != fibh->ebh) {
460 brelse(fibh->sbh);
461 fibh->sbh = fibh->ebh;
462 }
463
464 block = eloc.logicalBlockNum + ((elen - 1) >>
465 dir->i_sb->s_blocksize_bits);
466 fibh->ebh = udf_bread(dir,
467 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
468 if (!fibh->ebh)
469 goto out_err;
470 /* Extents could have been merged, invalidate our position */
471 brelse(epos.bh);
472 epos.bh = NULL;
473 epos.block = dinfo->i_location;
474 epos.offset = udf_file_entry_alloc_offset(dir);
475
476 if (!fibh->soffset) {
477 /* Find the freshly allocated block */
478 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
479 (EXT_RECORDED_ALLOCATED >> 30))
480 ;
481 block = eloc.logicalBlockNum + ((elen - 1) >>
482 dir->i_sb->s_blocksize_bits);
483 brelse(fibh->sbh);
484 fibh->sbh = fibh->ebh;
485 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
486 } else {
487 fi = (struct fileIdentDesc *)
488 (fibh->sbh->b_data + sb->s_blocksize +
489 fibh->soffset);
490 }
491 }
492
493 memset(cfi, 0, sizeof(struct fileIdentDesc));
494 if (UDF_SB(sb)->s_udfrev >= 0x0200)
495 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
496 sizeof(struct tag));
497 else
498 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
499 sizeof(struct tag));
500 cfi->fileVersionNum = cpu_to_le16(1);
501 cfi->lengthFileIdent = namelen;
502 cfi->lengthOfImpUse = cpu_to_le16(0);
503 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
504 dir->i_size += nfidlen;
505 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
506 dinfo->i_lenAlloc += nfidlen;
507 else {
508 /* Find the last extent and truncate it to proper size */
509 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
510 (EXT_RECORDED_ALLOCATED >> 30))
511 ;
512 elen -= dinfo->i_lenExtents - dir->i_size;
513 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
514 epos.offset -= sizeof(struct short_ad);
515 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
516 epos.offset -= sizeof(struct long_ad);
517 udf_write_aext(dir, &epos, &eloc, elen, 1);
518 dinfo->i_lenExtents = dir->i_size;
519 }
520
521 mark_inode_dirty(dir);
522 goto out_ok;
523 } else {
524 *err = -EIO;
525 goto out_err;
526 }
527
528 out_err:
529 fi = NULL;
530 if (fibh->sbh != fibh->ebh)
531 brelse(fibh->ebh);
532 brelse(fibh->sbh);
533 out_ok:
534 brelse(epos.bh);
535 kfree(name);
536 return fi;
537 }
538
539 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
540 struct udf_fileident_bh *fibh,
541 struct fileIdentDesc *cfi)
542 {
543 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
544
545 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
546 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
547
548 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
549 }
550
551 static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
552 {
553 struct udf_inode_info *iinfo = UDF_I(inode);
554 struct inode *dir = dentry->d_parent->d_inode;
555 struct udf_fileident_bh fibh;
556 struct fileIdentDesc cfi, *fi;
557 int err;
558
559 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
560 if (unlikely(!fi)) {
561 inode_dec_link_count(inode);
562 unlock_new_inode(inode);
563 iput(inode);
564 return err;
565 }
566 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
567 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
568 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
569 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
570 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
571 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
572 mark_inode_dirty(dir);
573 if (fibh.sbh != fibh.ebh)
574 brelse(fibh.ebh);
575 brelse(fibh.sbh);
576 unlock_new_inode(inode);
577 d_instantiate(dentry, inode);
578
579 return 0;
580 }
581
582 static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
583 bool excl)
584 {
585 struct inode *inode = udf_new_inode(dir, mode);
586
587 if (IS_ERR(inode))
588 return PTR_ERR(inode);
589
590 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
591 inode->i_data.a_ops = &udf_adinicb_aops;
592 else
593 inode->i_data.a_ops = &udf_aops;
594 inode->i_op = &udf_file_inode_operations;
595 inode->i_fop = &udf_file_operations;
596 mark_inode_dirty(inode);
597
598 return udf_add_nondir(dentry, inode);
599 }
600
601 static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
602 {
603 struct inode *inode = udf_new_inode(dir, mode);
604
605 if (IS_ERR(inode))
606 return PTR_ERR(inode);
607
608 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
609 inode->i_data.a_ops = &udf_adinicb_aops;
610 else
611 inode->i_data.a_ops = &udf_aops;
612 inode->i_op = &udf_file_inode_operations;
613 inode->i_fop = &udf_file_operations;
614 mark_inode_dirty(inode);
615 d_tmpfile(dentry, inode);
616 unlock_new_inode(inode);
617 return 0;
618 }
619
620 static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
621 dev_t rdev)
622 {
623 struct inode *inode;
624
625 if (!old_valid_dev(rdev))
626 return -EINVAL;
627
628 inode = udf_new_inode(dir, mode);
629 if (IS_ERR(inode))
630 return PTR_ERR(inode);
631
632 init_special_inode(inode, mode, rdev);
633 return udf_add_nondir(dentry, inode);
634 }
635
636 static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
637 {
638 struct inode *inode;
639 struct udf_fileident_bh fibh;
640 struct fileIdentDesc cfi, *fi;
641 int err;
642 struct udf_inode_info *dinfo = UDF_I(dir);
643 struct udf_inode_info *iinfo;
644
645 inode = udf_new_inode(dir, S_IFDIR | mode);
646 if (IS_ERR(inode))
647 return PTR_ERR(inode);
648
649 iinfo = UDF_I(inode);
650 inode->i_op = &udf_dir_inode_operations;
651 inode->i_fop = &udf_dir_operations;
652 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
653 if (!fi) {
654 inode_dec_link_count(inode);
655 unlock_new_inode(inode);
656 iput(inode);
657 goto out;
658 }
659 set_nlink(inode, 2);
660 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
661 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
662 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
663 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
664 cfi.fileCharacteristics =
665 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
666 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
667 brelse(fibh.sbh);
668 mark_inode_dirty(inode);
669
670 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
671 if (!fi) {
672 clear_nlink(inode);
673 mark_inode_dirty(inode);
674 unlock_new_inode(inode);
675 iput(inode);
676 goto out;
677 }
678 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
679 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
680 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
681 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
682 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
683 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
684 inc_nlink(dir);
685 mark_inode_dirty(dir);
686 unlock_new_inode(inode);
687 d_instantiate(dentry, inode);
688 if (fibh.sbh != fibh.ebh)
689 brelse(fibh.ebh);
690 brelse(fibh.sbh);
691 err = 0;
692
693 out:
694 return err;
695 }
696
697 static int empty_dir(struct inode *dir)
698 {
699 struct fileIdentDesc *fi, cfi;
700 struct udf_fileident_bh fibh;
701 loff_t f_pos;
702 loff_t size = udf_ext0_offset(dir) + dir->i_size;
703 int block;
704 struct kernel_lb_addr eloc;
705 uint32_t elen;
706 sector_t offset;
707 struct extent_position epos = {};
708 struct udf_inode_info *dinfo = UDF_I(dir);
709
710 f_pos = udf_ext0_offset(dir);
711 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
712
713 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
714 fibh.sbh = fibh.ebh = NULL;
715 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
716 &epos, &eloc, &elen, &offset) ==
717 (EXT_RECORDED_ALLOCATED >> 30)) {
718 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
719 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
720 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
721 epos.offset -= sizeof(struct short_ad);
722 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
723 epos.offset -= sizeof(struct long_ad);
724 } else
725 offset = 0;
726
727 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
728 if (!fibh.sbh) {
729 brelse(epos.bh);
730 return 0;
731 }
732 } else {
733 brelse(epos.bh);
734 return 0;
735 }
736
737 while (f_pos < size) {
738 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
739 &elen, &offset);
740 if (!fi) {
741 if (fibh.sbh != fibh.ebh)
742 brelse(fibh.ebh);
743 brelse(fibh.sbh);
744 brelse(epos.bh);
745 return 0;
746 }
747
748 if (cfi.lengthFileIdent &&
749 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
750 if (fibh.sbh != fibh.ebh)
751 brelse(fibh.ebh);
752 brelse(fibh.sbh);
753 brelse(epos.bh);
754 return 0;
755 }
756 }
757
758 if (fibh.sbh != fibh.ebh)
759 brelse(fibh.ebh);
760 brelse(fibh.sbh);
761 brelse(epos.bh);
762
763 return 1;
764 }
765
766 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
767 {
768 int retval;
769 struct inode *inode = dentry->d_inode;
770 struct udf_fileident_bh fibh;
771 struct fileIdentDesc *fi, cfi;
772 struct kernel_lb_addr tloc;
773
774 retval = -ENOENT;
775 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
776 if (!fi)
777 goto out;
778
779 retval = -EIO;
780 tloc = lelb_to_cpu(cfi.icb.extLocation);
781 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
782 goto end_rmdir;
783 retval = -ENOTEMPTY;
784 if (!empty_dir(inode))
785 goto end_rmdir;
786 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
787 if (retval)
788 goto end_rmdir;
789 if (inode->i_nlink != 2)
790 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
791 inode->i_nlink);
792 clear_nlink(inode);
793 inode->i_size = 0;
794 inode_dec_link_count(dir);
795 inode->i_ctime = dir->i_ctime = dir->i_mtime =
796 current_fs_time(dir->i_sb);
797 mark_inode_dirty(dir);
798
799 end_rmdir:
800 if (fibh.sbh != fibh.ebh)
801 brelse(fibh.ebh);
802 brelse(fibh.sbh);
803
804 out:
805 return retval;
806 }
807
808 static int udf_unlink(struct inode *dir, struct dentry *dentry)
809 {
810 int retval;
811 struct inode *inode = dentry->d_inode;
812 struct udf_fileident_bh fibh;
813 struct fileIdentDesc *fi;
814 struct fileIdentDesc cfi;
815 struct kernel_lb_addr tloc;
816
817 retval = -ENOENT;
818 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
819 if (!fi)
820 goto out;
821
822 retval = -EIO;
823 tloc = lelb_to_cpu(cfi.icb.extLocation);
824 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
825 goto end_unlink;
826
827 if (!inode->i_nlink) {
828 udf_debug("Deleting nonexistent file (%lu), %d\n",
829 inode->i_ino, inode->i_nlink);
830 set_nlink(inode, 1);
831 }
832 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
833 if (retval)
834 goto end_unlink;
835 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
836 mark_inode_dirty(dir);
837 inode_dec_link_count(inode);
838 inode->i_ctime = dir->i_ctime;
839 retval = 0;
840
841 end_unlink:
842 if (fibh.sbh != fibh.ebh)
843 brelse(fibh.ebh);
844 brelse(fibh.sbh);
845
846 out:
847 return retval;
848 }
849
850 static int udf_symlink(struct inode *dir, struct dentry *dentry,
851 const char *symname)
852 {
853 struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO);
854 struct pathComponent *pc;
855 const char *compstart;
856 struct extent_position epos = {};
857 int eoffset, elen = 0;
858 uint8_t *ea;
859 int err;
860 int block;
861 unsigned char *name = NULL;
862 int namelen;
863 struct udf_inode_info *iinfo;
864 struct super_block *sb = dir->i_sb;
865
866 if (IS_ERR(inode))
867 return PTR_ERR(inode);
868
869 iinfo = UDF_I(inode);
870 down_write(&iinfo->i_data_sem);
871 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
872 if (!name) {
873 err = -ENOMEM;
874 goto out_no_entry;
875 }
876
877 inode->i_data.a_ops = &udf_symlink_aops;
878 inode->i_op = &udf_symlink_inode_operations;
879
880 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
881 struct kernel_lb_addr eloc;
882 uint32_t bsize;
883
884 block = udf_new_block(sb, inode,
885 iinfo->i_location.partitionReferenceNum,
886 iinfo->i_location.logicalBlockNum, &err);
887 if (!block)
888 goto out_no_entry;
889 epos.block = iinfo->i_location;
890 epos.offset = udf_file_entry_alloc_offset(inode);
891 epos.bh = NULL;
892 eloc.logicalBlockNum = block;
893 eloc.partitionReferenceNum =
894 iinfo->i_location.partitionReferenceNum;
895 bsize = sb->s_blocksize;
896 iinfo->i_lenExtents = bsize;
897 udf_add_aext(inode, &epos, &eloc, bsize, 0);
898 brelse(epos.bh);
899
900 block = udf_get_pblock(sb, block,
901 iinfo->i_location.partitionReferenceNum,
902 0);
903 epos.bh = udf_tgetblk(sb, block);
904 lock_buffer(epos.bh);
905 memset(epos.bh->b_data, 0x00, bsize);
906 set_buffer_uptodate(epos.bh);
907 unlock_buffer(epos.bh);
908 mark_buffer_dirty_inode(epos.bh, inode);
909 ea = epos.bh->b_data + udf_ext0_offset(inode);
910 } else
911 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
912
913 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
914 pc = (struct pathComponent *)ea;
915
916 if (*symname == '/') {
917 do {
918 symname++;
919 } while (*symname == '/');
920
921 pc->componentType = 1;
922 pc->lengthComponentIdent = 0;
923 pc->componentFileVersionNum = 0;
924 elen += sizeof(struct pathComponent);
925 }
926
927 err = -ENAMETOOLONG;
928
929 while (*symname) {
930 if (elen + sizeof(struct pathComponent) > eoffset)
931 goto out_no_entry;
932
933 pc = (struct pathComponent *)(ea + elen);
934
935 compstart = symname;
936
937 do {
938 symname++;
939 } while (*symname && *symname != '/');
940
941 pc->componentType = 5;
942 pc->lengthComponentIdent = 0;
943 pc->componentFileVersionNum = 0;
944 if (compstart[0] == '.') {
945 if ((symname - compstart) == 1)
946 pc->componentType = 4;
947 else if ((symname - compstart) == 2 &&
948 compstart[1] == '.')
949 pc->componentType = 3;
950 }
951
952 if (pc->componentType == 5) {
953 namelen = udf_put_filename(sb, compstart, name,
954 symname - compstart);
955 if (!namelen)
956 goto out_no_entry;
957
958 if (elen + sizeof(struct pathComponent) + namelen >
959 eoffset)
960 goto out_no_entry;
961 else
962 pc->lengthComponentIdent = namelen;
963
964 memcpy(pc->componentIdent, name, namelen);
965 }
966
967 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
968
969 if (*symname) {
970 do {
971 symname++;
972 } while (*symname == '/');
973 }
974 }
975
976 brelse(epos.bh);
977 inode->i_size = elen;
978 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
979 iinfo->i_lenAlloc = inode->i_size;
980 else
981 udf_truncate_tail_extent(inode);
982 mark_inode_dirty(inode);
983 up_write(&iinfo->i_data_sem);
984
985 err = udf_add_nondir(dentry, inode);
986 out:
987 kfree(name);
988 return err;
989
990 out_no_entry:
991 up_write(&iinfo->i_data_sem);
992 inode_dec_link_count(inode);
993 unlock_new_inode(inode);
994 iput(inode);
995 goto out;
996 }
997
998 static int udf_link(struct dentry *old_dentry, struct inode *dir,
999 struct dentry *dentry)
1000 {
1001 struct inode *inode = old_dentry->d_inode;
1002 struct udf_fileident_bh fibh;
1003 struct fileIdentDesc cfi, *fi;
1004 int err;
1005
1006 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1007 if (!fi) {
1008 return err;
1009 }
1010 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1011 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1012 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
1013 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1014 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
1015 }
1016 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1017 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1018 mark_inode_dirty(dir);
1019
1020 if (fibh.sbh != fibh.ebh)
1021 brelse(fibh.ebh);
1022 brelse(fibh.sbh);
1023 inc_nlink(inode);
1024 inode->i_ctime = current_fs_time(inode->i_sb);
1025 mark_inode_dirty(inode);
1026 ihold(inode);
1027 d_instantiate(dentry, inode);
1028
1029 return 0;
1030 }
1031
1032 /* Anybody can rename anything with this: the permission checks are left to the
1033 * higher-level routines.
1034 */
1035 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1036 struct inode *new_dir, struct dentry *new_dentry)
1037 {
1038 struct inode *old_inode = old_dentry->d_inode;
1039 struct inode *new_inode = new_dentry->d_inode;
1040 struct udf_fileident_bh ofibh, nfibh;
1041 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1042 struct fileIdentDesc ocfi, ncfi;
1043 struct buffer_head *dir_bh = NULL;
1044 int retval = -ENOENT;
1045 struct kernel_lb_addr tloc;
1046 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1047
1048 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1049 if (ofi) {
1050 if (ofibh.sbh != ofibh.ebh)
1051 brelse(ofibh.ebh);
1052 brelse(ofibh.sbh);
1053 }
1054 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1055 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
1056 != old_inode->i_ino)
1057 goto end_rename;
1058
1059 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
1060 if (nfi) {
1061 if (!new_inode) {
1062 if (nfibh.sbh != nfibh.ebh)
1063 brelse(nfibh.ebh);
1064 brelse(nfibh.sbh);
1065 nfi = NULL;
1066 }
1067 }
1068 if (S_ISDIR(old_inode->i_mode)) {
1069 int offset = udf_ext0_offset(old_inode);
1070
1071 if (new_inode) {
1072 retval = -ENOTEMPTY;
1073 if (!empty_dir(new_inode))
1074 goto end_rename;
1075 }
1076 retval = -EIO;
1077 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1078 dir_fi = udf_get_fileident(
1079 old_iinfo->i_ext.i_data -
1080 (old_iinfo->i_efe ?
1081 sizeof(struct extendedFileEntry) :
1082 sizeof(struct fileEntry)),
1083 old_inode->i_sb->s_blocksize, &offset);
1084 } else {
1085 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1086 if (!dir_bh)
1087 goto end_rename;
1088 dir_fi = udf_get_fileident(dir_bh->b_data,
1089 old_inode->i_sb->s_blocksize, &offset);
1090 }
1091 if (!dir_fi)
1092 goto end_rename;
1093 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1094 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
1095 old_dir->i_ino)
1096 goto end_rename;
1097 }
1098 if (!nfi) {
1099 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1100 &retval);
1101 if (!nfi)
1102 goto end_rename;
1103 }
1104
1105 /*
1106 * Like most other Unix systems, set the ctime for inodes on a
1107 * rename.
1108 */
1109 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1110 mark_inode_dirty(old_inode);
1111
1112 /*
1113 * ok, that's it
1114 */
1115 ncfi.fileVersionNum = ocfi.fileVersionNum;
1116 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1117 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
1118 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1119
1120 /* The old fid may have moved - find it again */
1121 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1122 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1123
1124 if (new_inode) {
1125 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1126 inode_dec_link_count(new_inode);
1127 }
1128 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1129 mark_inode_dirty(old_dir);
1130
1131 if (dir_fi) {
1132 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1133 udf_update_tag((char *)dir_fi,
1134 (sizeof(struct fileIdentDesc) +
1135 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1136 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1137 mark_inode_dirty(old_inode);
1138 else
1139 mark_buffer_dirty_inode(dir_bh, old_inode);
1140
1141 inode_dec_link_count(old_dir);
1142 if (new_inode)
1143 inode_dec_link_count(new_inode);
1144 else {
1145 inc_nlink(new_dir);
1146 mark_inode_dirty(new_dir);
1147 }
1148 }
1149
1150 if (ofi) {
1151 if (ofibh.sbh != ofibh.ebh)
1152 brelse(ofibh.ebh);
1153 brelse(ofibh.sbh);
1154 }
1155
1156 retval = 0;
1157
1158 end_rename:
1159 brelse(dir_bh);
1160 if (nfi) {
1161 if (nfibh.sbh != nfibh.ebh)
1162 brelse(nfibh.ebh);
1163 brelse(nfibh.sbh);
1164 }
1165
1166 return retval;
1167 }
1168
1169 static struct dentry *udf_get_parent(struct dentry *child)
1170 {
1171 struct kernel_lb_addr tloc;
1172 struct inode *inode = NULL;
1173 struct qstr dotdot = QSTR_INIT("..", 2);
1174 struct fileIdentDesc cfi;
1175 struct udf_fileident_bh fibh;
1176
1177 if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
1178 return ERR_PTR(-EACCES);
1179
1180 if (fibh.sbh != fibh.ebh)
1181 brelse(fibh.ebh);
1182 brelse(fibh.sbh);
1183
1184 tloc = lelb_to_cpu(cfi.icb.extLocation);
1185 inode = udf_iget(child->d_inode->i_sb, &tloc);
1186 if (IS_ERR(inode))
1187 return ERR_CAST(inode);
1188
1189 return d_obtain_alias(inode);
1190 }
1191
1192
1193 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1194 u16 partref, __u32 generation)
1195 {
1196 struct inode *inode;
1197 struct kernel_lb_addr loc;
1198
1199 if (block == 0)
1200 return ERR_PTR(-ESTALE);
1201
1202 loc.logicalBlockNum = block;
1203 loc.partitionReferenceNum = partref;
1204 inode = udf_iget(sb, &loc);
1205
1206 if (IS_ERR(inode))
1207 return ERR_CAST(inode);
1208
1209 if (generation && inode->i_generation != generation) {
1210 iput(inode);
1211 return ERR_PTR(-ESTALE);
1212 }
1213 return d_obtain_alias(inode);
1214 }
1215
1216 static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1217 struct fid *fid, int fh_len, int fh_type)
1218 {
1219 if ((fh_len != 3 && fh_len != 5) ||
1220 (fh_type != FILEID_UDF_WITH_PARENT &&
1221 fh_type != FILEID_UDF_WITHOUT_PARENT))
1222 return NULL;
1223
1224 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1225 fid->udf.generation);
1226 }
1227
1228 static struct dentry *udf_fh_to_parent(struct super_block *sb,
1229 struct fid *fid, int fh_len, int fh_type)
1230 {
1231 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
1232 return NULL;
1233
1234 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1235 fid->udf.parent_partref,
1236 fid->udf.parent_generation);
1237 }
1238 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1239 struct inode *parent)
1240 {
1241 int len = *lenp;
1242 struct kernel_lb_addr location = UDF_I(inode)->i_location;
1243 struct fid *fid = (struct fid *)fh;
1244 int type = FILEID_UDF_WITHOUT_PARENT;
1245
1246 if (parent && (len < 5)) {
1247 *lenp = 5;
1248 return FILEID_INVALID;
1249 } else if (len < 3) {
1250 *lenp = 3;
1251 return FILEID_INVALID;
1252 }
1253
1254 *lenp = 3;
1255 fid->udf.block = location.logicalBlockNum;
1256 fid->udf.partref = location.partitionReferenceNum;
1257 fid->udf.parent_partref = 0;
1258 fid->udf.generation = inode->i_generation;
1259
1260 if (parent) {
1261 location = UDF_I(parent)->i_location;
1262 fid->udf.parent_block = location.logicalBlockNum;
1263 fid->udf.parent_partref = location.partitionReferenceNum;
1264 fid->udf.parent_generation = inode->i_generation;
1265 *lenp = 5;
1266 type = FILEID_UDF_WITH_PARENT;
1267 }
1268
1269 return type;
1270 }
1271
1272 const struct export_operations udf_export_ops = {
1273 .encode_fh = udf_encode_fh,
1274 .fh_to_dentry = udf_fh_to_dentry,
1275 .fh_to_parent = udf_fh_to_parent,
1276 .get_parent = udf_get_parent,
1277 };
1278
1279 const struct inode_operations udf_dir_inode_operations = {
1280 .lookup = udf_lookup,
1281 .create = udf_create,
1282 .link = udf_link,
1283 .unlink = udf_unlink,
1284 .symlink = udf_symlink,
1285 .mkdir = udf_mkdir,
1286 .rmdir = udf_rmdir,
1287 .mknod = udf_mknod,
1288 .rename = udf_rename,
1289 .tmpfile = udf_tmpfile,
1290 };
1291 const struct inode_operations udf_symlink_inode_operations = {
1292 .readlink = generic_readlink,
1293 .follow_link = page_follow_link_light,
1294 .put_link = page_put_link,
1295 };
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