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ARM: sun7i: olinuxino micro: Relicense the device tree under GPLv2/X11
[linux-2.6/btrfs-unstable.git] / fs / udf / namei.c
blob5c03f0dfb98bcd6f7b396431f5e9ed7f49d23c8d
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/sched.h>
31 #include <linux/crc-itu-t.h>
32 #include <linux/exportfs.h>
33
34 static inline int udf_match(int len1, const unsigned char *name1, int len2,
35 const unsigned char *name2)
36 {
37 if (len1 != len2)
38 return 0;
39
40 return !memcmp(name1, name2, len1);
41 }
42
43 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
44 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
45 uint8_t *impuse, uint8_t *fileident)
46 {
47 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag);
48 uint16_t crc;
49 int offset;
50 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
51 uint8_t lfi = cfi->lengthFileIdent;
52 int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
53 sizeof(struct fileIdentDesc);
54 int adinicb = 0;
55
56 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
57 adinicb = 1;
58
59 offset = fibh->soffset + sizeof(struct fileIdentDesc);
60
61 if (impuse) {
62 if (adinicb || (offset + liu < 0)) {
63 memcpy((uint8_t *)sfi->impUse, impuse, liu);
64 } else if (offset >= 0) {
65 memcpy(fibh->ebh->b_data + offset, impuse, liu);
66 } else {
67 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
68 memcpy(fibh->ebh->b_data, impuse - offset,
69 liu + offset);
70 }
71 }
72
73 offset += liu;
74
75 if (fileident) {
76 if (adinicb || (offset + lfi < 0)) {
77 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
78 } else if (offset >= 0) {
79 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
80 } else {
81 memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
82 -offset);
83 memcpy(fibh->ebh->b_data, fileident - offset,
84 lfi + offset);
85 }
86 }
87
88 offset += lfi;
89
90 if (adinicb || (offset + padlen < 0)) {
91 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
92 } else if (offset >= 0) {
93 memset(fibh->ebh->b_data + offset, 0x00, padlen);
94 } else {
95 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
96 memset(fibh->ebh->b_data, 0x00, padlen + offset);
97 }
98
99 crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
100 sizeof(struct fileIdentDesc) - sizeof(struct tag));
101
102 if (fibh->sbh == fibh->ebh) {
103 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
104 crclen + sizeof(struct tag) -
105 sizeof(struct fileIdentDesc));
106 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
107 crc = crc_itu_t(crc, fibh->ebh->b_data +
108 sizeof(struct fileIdentDesc) +
109 fibh->soffset,
110 crclen + sizeof(struct tag) -
111 sizeof(struct fileIdentDesc));
112 } else {
113 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
114 -fibh->soffset - sizeof(struct fileIdentDesc));
115 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
116 }
117
118 cfi->descTag.descCRC = cpu_to_le16(crc);
119 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
120 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
121
122 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
123 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
124 sizeof(struct fileIdentDesc));
125 } else {
126 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
127 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
128 sizeof(struct fileIdentDesc) + fibh->soffset);
129 }
130
131 if (adinicb) {
132 mark_inode_dirty(inode);
133 } else {
134 if (fibh->sbh != fibh->ebh)
135 mark_buffer_dirty_inode(fibh->ebh, inode);
136 mark_buffer_dirty_inode(fibh->sbh, inode);
137 }
138 return 0;
139 }
140
141 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
142 const struct qstr *child,
143 struct udf_fileident_bh *fibh,
144 struct fileIdentDesc *cfi)
145 {
146 struct fileIdentDesc *fi = NULL;
147 loff_t f_pos;
148 int block, flen;
149 unsigned char *fname = NULL;
150 unsigned char *nameptr;
151 uint8_t lfi;
152 uint16_t liu;
153 loff_t size;
154 struct kernel_lb_addr eloc;
155 uint32_t elen;
156 sector_t offset;
157 struct extent_position epos = {};
158 struct udf_inode_info *dinfo = UDF_I(dir);
159 int isdotdot = child->len == 2 &&
160 child->name[0] == '.' && child->name[1] == '.';
161 struct super_block *sb = dir->i_sb;
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 & (sb->s_blocksize - 1);
168 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
169 if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos,
170 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
171 goto out_err;
172 block = udf_get_lb_pblock(sb, &eloc, offset);
173 if ((++offset << 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(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(sb, UDF_FLAG_UNDELETE))
221 continue;
222 }
223
224 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
225 if (!UDF_QUERY_FLAG(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(sb, nameptr, lfi, fname, UDF_NAME_LEN);
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 = d_inode(dentry->d_parent);
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 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
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 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
686 mark_inode_dirty(dir);
687 unlock_new_inode(inode);
688 d_instantiate(dentry, inode);
689 if (fibh.sbh != fibh.ebh)
690 brelse(fibh.ebh);
691 brelse(fibh.sbh);
692 err = 0;
693
694 out:
695 return err;
696 }
697
698 static int empty_dir(struct inode *dir)
699 {
700 struct fileIdentDesc *fi, cfi;
701 struct udf_fileident_bh fibh;
702 loff_t f_pos;
703 loff_t size = udf_ext0_offset(dir) + dir->i_size;
704 int block;
705 struct kernel_lb_addr eloc;
706 uint32_t elen;
707 sector_t offset;
708 struct extent_position epos = {};
709 struct udf_inode_info *dinfo = UDF_I(dir);
710
711 f_pos = udf_ext0_offset(dir);
712 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
713
714 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
715 fibh.sbh = fibh.ebh = NULL;
716 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
717 &epos, &eloc, &elen, &offset) ==
718 (EXT_RECORDED_ALLOCATED >> 30)) {
719 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
720 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
721 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
722 epos.offset -= sizeof(struct short_ad);
723 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
724 epos.offset -= sizeof(struct long_ad);
725 } else
726 offset = 0;
727
728 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
729 if (!fibh.sbh) {
730 brelse(epos.bh);
731 return 0;
732 }
733 } else {
734 brelse(epos.bh);
735 return 0;
736 }
737
738 while (f_pos < size) {
739 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
740 &elen, &offset);
741 if (!fi) {
742 if (fibh.sbh != fibh.ebh)
743 brelse(fibh.ebh);
744 brelse(fibh.sbh);
745 brelse(epos.bh);
746 return 0;
747 }
748
749 if (cfi.lengthFileIdent &&
750 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
751 if (fibh.sbh != fibh.ebh)
752 brelse(fibh.ebh);
753 brelse(fibh.sbh);
754 brelse(epos.bh);
755 return 0;
756 }
757 }
758
759 if (fibh.sbh != fibh.ebh)
760 brelse(fibh.ebh);
761 brelse(fibh.sbh);
762 brelse(epos.bh);
763
764 return 1;
765 }
766
767 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
768 {
769 int retval;
770 struct inode *inode = d_inode(dentry);
771 struct udf_fileident_bh fibh;
772 struct fileIdentDesc *fi, cfi;
773 struct kernel_lb_addr tloc;
774
775 retval = -ENOENT;
776 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
777 if (!fi)
778 goto out;
779
780 retval = -EIO;
781 tloc = lelb_to_cpu(cfi.icb.extLocation);
782 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
783 goto end_rmdir;
784 retval = -ENOTEMPTY;
785 if (!empty_dir(inode))
786 goto end_rmdir;
787 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
788 if (retval)
789 goto end_rmdir;
790 if (inode->i_nlink != 2)
791 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
792 inode->i_nlink);
793 clear_nlink(inode);
794 inode->i_size = 0;
795 inode_dec_link_count(dir);
796 inode->i_ctime = dir->i_ctime = dir->i_mtime =
797 current_fs_time(dir->i_sb);
798 mark_inode_dirty(dir);
799
800 end_rmdir:
801 if (fibh.sbh != fibh.ebh)
802 brelse(fibh.ebh);
803 brelse(fibh.sbh);
804
805 out:
806 return retval;
807 }
808
809 static int udf_unlink(struct inode *dir, struct dentry *dentry)
810 {
811 int retval;
812 struct inode *inode = d_inode(dentry);
813 struct udf_fileident_bh fibh;
814 struct fileIdentDesc *fi;
815 struct fileIdentDesc cfi;
816 struct kernel_lb_addr tloc;
817
818 retval = -ENOENT;
819 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
820 if (!fi)
821 goto out;
822
823 retval = -EIO;
824 tloc = lelb_to_cpu(cfi.icb.extLocation);
825 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
826 goto end_unlink;
827
828 if (!inode->i_nlink) {
829 udf_debug("Deleting nonexistent file (%lu), %d\n",
830 inode->i_ino, inode->i_nlink);
831 set_nlink(inode, 1);
832 }
833 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
834 if (retval)
835 goto end_unlink;
836 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
837 mark_inode_dirty(dir);
838 inode_dec_link_count(inode);
839 inode->i_ctime = dir->i_ctime;
840 retval = 0;
841
842 end_unlink:
843 if (fibh.sbh != fibh.ebh)
844 brelse(fibh.ebh);
845 brelse(fibh.sbh);
846
847 out:
848 return retval;
849 }
850
851 static int udf_symlink(struct inode *dir, struct dentry *dentry,
852 const char *symname)
853 {
854 struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO);
855 struct pathComponent *pc;
856 const char *compstart;
857 struct extent_position epos = {};
858 int eoffset, elen = 0;
859 uint8_t *ea;
860 int err;
861 int block;
862 unsigned char *name = NULL;
863 int namelen;
864 struct udf_inode_info *iinfo;
865 struct super_block *sb = dir->i_sb;
866
867 if (IS_ERR(inode))
868 return PTR_ERR(inode);
869
870 iinfo = UDF_I(inode);
871 down_write(&iinfo->i_data_sem);
872 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
873 if (!name) {
874 err = -ENOMEM;
875 goto out_no_entry;
876 }
877
878 inode->i_data.a_ops = &udf_symlink_aops;
879 inode->i_op = &udf_symlink_inode_operations;
880
881 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
882 struct kernel_lb_addr eloc;
883 uint32_t bsize;
884
885 block = udf_new_block(sb, inode,
886 iinfo->i_location.partitionReferenceNum,
887 iinfo->i_location.logicalBlockNum, &err);
888 if (!block)
889 goto out_no_entry;
890 epos.block = iinfo->i_location;
891 epos.offset = udf_file_entry_alloc_offset(inode);
892 epos.bh = NULL;
893 eloc.logicalBlockNum = block;
894 eloc.partitionReferenceNum =
895 iinfo->i_location.partitionReferenceNum;
896 bsize = sb->s_blocksize;
897 iinfo->i_lenExtents = bsize;
898 udf_add_aext(inode, &epos, &eloc, bsize, 0);
899 brelse(epos.bh);
900
901 block = udf_get_pblock(sb, block,
902 iinfo->i_location.partitionReferenceNum,
903 0);
904 epos.bh = udf_tgetblk(sb, block);
905 lock_buffer(epos.bh);
906 memset(epos.bh->b_data, 0x00, bsize);
907 set_buffer_uptodate(epos.bh);
908 unlock_buffer(epos.bh);
909 mark_buffer_dirty_inode(epos.bh, inode);
910 ea = epos.bh->b_data + udf_ext0_offset(inode);
911 } else
912 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
913
914 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
915 pc = (struct pathComponent *)ea;
916
917 if (*symname == '/') {
918 do {
919 symname++;
920 } while (*symname == '/');
921
922 pc->componentType = 1;
923 pc->lengthComponentIdent = 0;
924 pc->componentFileVersionNum = 0;
925 elen += sizeof(struct pathComponent);
926 }
927
928 err = -ENAMETOOLONG;
929
930 while (*symname) {
931 if (elen + sizeof(struct pathComponent) > eoffset)
932 goto out_no_entry;
933
934 pc = (struct pathComponent *)(ea + elen);
935
936 compstart = symname;
937
938 do {
939 symname++;
940 } while (*symname && *symname != '/');
941
942 pc->componentType = 5;
943 pc->lengthComponentIdent = 0;
944 pc->componentFileVersionNum = 0;
945 if (compstart[0] == '.') {
946 if ((symname - compstart) == 1)
947 pc->componentType = 4;
948 else if ((symname - compstart) == 2 &&
949 compstart[1] == '.')
950 pc->componentType = 3;
951 }
952
953 if (pc->componentType == 5) {
954 namelen = udf_put_filename(sb, compstart, name,
955 symname - compstart);
956 if (!namelen)
957 goto out_no_entry;
958
959 if (elen + sizeof(struct pathComponent) + namelen >
960 eoffset)
961 goto out_no_entry;
962 else
963 pc->lengthComponentIdent = namelen;
964
965 memcpy(pc->componentIdent, name, namelen);
966 }
967
968 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
969
970 if (*symname) {
971 do {
972 symname++;
973 } while (*symname == '/');
974 }
975 }
976
977 brelse(epos.bh);
978 inode->i_size = elen;
979 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
980 iinfo->i_lenAlloc = inode->i_size;
981 else
982 udf_truncate_tail_extent(inode);
983 mark_inode_dirty(inode);
984 up_write(&iinfo->i_data_sem);
985
986 err = udf_add_nondir(dentry, inode);
987 out:
988 kfree(name);
989 return err;
990
991 out_no_entry:
992 up_write(&iinfo->i_data_sem);
993 inode_dec_link_count(inode);
994 unlock_new_inode(inode);
995 iput(inode);
996 goto out;
997 }
998
999 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1000 struct dentry *dentry)
1001 {
1002 struct inode *inode = d_inode(old_dentry);
1003 struct udf_fileident_bh fibh;
1004 struct fileIdentDesc cfi, *fi;
1005 int err;
1006
1007 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1008 if (!fi) {
1009 return err;
1010 }
1011 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1012 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1013 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
1014 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1015 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
1016 }
1017 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1018 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1019 mark_inode_dirty(dir);
1020
1021 if (fibh.sbh != fibh.ebh)
1022 brelse(fibh.ebh);
1023 brelse(fibh.sbh);
1024 inc_nlink(inode);
1025 inode->i_ctime = current_fs_time(inode->i_sb);
1026 mark_inode_dirty(inode);
1027 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
1028 mark_inode_dirty(dir);
1029 ihold(inode);
1030 d_instantiate(dentry, inode);
1031
1032 return 0;
1033 }
1034
1035 /* Anybody can rename anything with this: the permission checks are left to the
1036 * higher-level routines.
1037 */
1038 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1039 struct inode *new_dir, struct dentry *new_dentry)
1040 {
1041 struct inode *old_inode = d_inode(old_dentry);
1042 struct inode *new_inode = d_inode(new_dentry);
1043 struct udf_fileident_bh ofibh, nfibh;
1044 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1045 struct fileIdentDesc ocfi, ncfi;
1046 struct buffer_head *dir_bh = NULL;
1047 int retval = -ENOENT;
1048 struct kernel_lb_addr tloc;
1049 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1050
1051 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1052 if (ofi) {
1053 if (ofibh.sbh != ofibh.ebh)
1054 brelse(ofibh.ebh);
1055 brelse(ofibh.sbh);
1056 }
1057 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1058 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
1059 != old_inode->i_ino)
1060 goto end_rename;
1061
1062 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
1063 if (nfi) {
1064 if (!new_inode) {
1065 if (nfibh.sbh != nfibh.ebh)
1066 brelse(nfibh.ebh);
1067 brelse(nfibh.sbh);
1068 nfi = NULL;
1069 }
1070 }
1071 if (S_ISDIR(old_inode->i_mode)) {
1072 int offset = udf_ext0_offset(old_inode);
1073
1074 if (new_inode) {
1075 retval = -ENOTEMPTY;
1076 if (!empty_dir(new_inode))
1077 goto end_rename;
1078 }
1079 retval = -EIO;
1080 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1081 dir_fi = udf_get_fileident(
1082 old_iinfo->i_ext.i_data -
1083 (old_iinfo->i_efe ?
1084 sizeof(struct extendedFileEntry) :
1085 sizeof(struct fileEntry)),
1086 old_inode->i_sb->s_blocksize, &offset);
1087 } else {
1088 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1089 if (!dir_bh)
1090 goto end_rename;
1091 dir_fi = udf_get_fileident(dir_bh->b_data,
1092 old_inode->i_sb->s_blocksize, &offset);
1093 }
1094 if (!dir_fi)
1095 goto end_rename;
1096 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1097 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
1098 old_dir->i_ino)
1099 goto end_rename;
1100 }
1101 if (!nfi) {
1102 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1103 &retval);
1104 if (!nfi)
1105 goto end_rename;
1106 }
1107
1108 /*
1109 * Like most other Unix systems, set the ctime for inodes on a
1110 * rename.
1111 */
1112 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1113 mark_inode_dirty(old_inode);
1114
1115 /*
1116 * ok, that's it
1117 */
1118 ncfi.fileVersionNum = ocfi.fileVersionNum;
1119 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1120 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
1121 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1122
1123 /* The old fid may have moved - find it again */
1124 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1125 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1126
1127 if (new_inode) {
1128 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1129 inode_dec_link_count(new_inode);
1130 }
1131 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1132 new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb);
1133 mark_inode_dirty(old_dir);
1134 mark_inode_dirty(new_dir);
1135
1136 if (dir_fi) {
1137 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1138 udf_update_tag((char *)dir_fi,
1139 (sizeof(struct fileIdentDesc) +
1140 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1141 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1142 mark_inode_dirty(old_inode);
1143 else
1144 mark_buffer_dirty_inode(dir_bh, old_inode);
1145
1146 inode_dec_link_count(old_dir);
1147 if (new_inode)
1148 inode_dec_link_count(new_inode);
1149 else {
1150 inc_nlink(new_dir);
1151 mark_inode_dirty(new_dir);
1152 }
1153 }
1154
1155 if (ofi) {
1156 if (ofibh.sbh != ofibh.ebh)
1157 brelse(ofibh.ebh);
1158 brelse(ofibh.sbh);
1159 }
1160
1161 retval = 0;
1162
1163 end_rename:
1164 brelse(dir_bh);
1165 if (nfi) {
1166 if (nfibh.sbh != nfibh.ebh)
1167 brelse(nfibh.ebh);
1168 brelse(nfibh.sbh);
1169 }
1170
1171 return retval;
1172 }
1173
1174 static struct dentry *udf_get_parent(struct dentry *child)
1175 {
1176 struct kernel_lb_addr tloc;
1177 struct inode *inode = NULL;
1178 struct qstr dotdot = QSTR_INIT("..", 2);
1179 struct fileIdentDesc cfi;
1180 struct udf_fileident_bh fibh;
1181
1182 if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi))
1183 return ERR_PTR(-EACCES);
1184
1185 if (fibh.sbh != fibh.ebh)
1186 brelse(fibh.ebh);
1187 brelse(fibh.sbh);
1188
1189 tloc = lelb_to_cpu(cfi.icb.extLocation);
1190 inode = udf_iget(d_inode(child)->i_sb, &tloc);
1191 if (IS_ERR(inode))
1192 return ERR_CAST(inode);
1193
1194 return d_obtain_alias(inode);
1195 }
1196
1197
1198 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1199 u16 partref, __u32 generation)
1200 {
1201 struct inode *inode;
1202 struct kernel_lb_addr loc;
1203
1204 if (block == 0)
1205 return ERR_PTR(-ESTALE);
1206
1207 loc.logicalBlockNum = block;
1208 loc.partitionReferenceNum = partref;
1209 inode = udf_iget(sb, &loc);
1210
1211 if (IS_ERR(inode))
1212 return ERR_CAST(inode);
1213
1214 if (generation && inode->i_generation != generation) {
1215 iput(inode);
1216 return ERR_PTR(-ESTALE);
1217 }
1218 return d_obtain_alias(inode);
1219 }
1220
1221 static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1222 struct fid *fid, int fh_len, int fh_type)
1223 {
1224 if ((fh_len != 3 && fh_len != 5) ||
1225 (fh_type != FILEID_UDF_WITH_PARENT &&
1226 fh_type != FILEID_UDF_WITHOUT_PARENT))
1227 return NULL;
1228
1229 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1230 fid->udf.generation);
1231 }
1232
1233 static struct dentry *udf_fh_to_parent(struct super_block *sb,
1234 struct fid *fid, int fh_len, int fh_type)
1235 {
1236 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
1237 return NULL;
1238
1239 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1240 fid->udf.parent_partref,
1241 fid->udf.parent_generation);
1242 }
1243 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1244 struct inode *parent)
1245 {
1246 int len = *lenp;
1247 struct kernel_lb_addr location = UDF_I(inode)->i_location;
1248 struct fid *fid = (struct fid *)fh;
1249 int type = FILEID_UDF_WITHOUT_PARENT;
1250
1251 if (parent && (len < 5)) {
1252 *lenp = 5;
1253 return FILEID_INVALID;
1254 } else if (len < 3) {
1255 *lenp = 3;
1256 return FILEID_INVALID;
1257 }
1258
1259 *lenp = 3;
1260 fid->udf.block = location.logicalBlockNum;
1261 fid->udf.partref = location.partitionReferenceNum;
1262 fid->udf.parent_partref = 0;
1263 fid->udf.generation = inode->i_generation;
1264
1265 if (parent) {
1266 location = UDF_I(parent)->i_location;
1267 fid->udf.parent_block = location.logicalBlockNum;
1268 fid->udf.parent_partref = location.partitionReferenceNum;
1269 fid->udf.parent_generation = inode->i_generation;
1270 *lenp = 5;
1271 type = FILEID_UDF_WITH_PARENT;
1272 }
1273
1274 return type;
1275 }
1276
1277 const struct export_operations udf_export_ops = {
1278 .encode_fh = udf_encode_fh,
1279 .fh_to_dentry = udf_fh_to_dentry,
1280 .fh_to_parent = udf_fh_to_parent,
1281 .get_parent = udf_get_parent,
1282 };
1283
1284 const struct inode_operations udf_dir_inode_operations = {
1285 .lookup = udf_lookup,
1286 .create = udf_create,
1287 .link = udf_link,
1288 .unlink = udf_unlink,
1289 .symlink = udf_symlink,
1290 .mkdir = udf_mkdir,
1291 .rmdir = udf_rmdir,
1292 .mknod = udf_mknod,
1293 .rename = udf_rename,
1294 .tmpfile = udf_tmpfile,
1295 };
1296 const struct inode_operations udf_symlink_inode_operations = {
1297 .readlink = generic_readlink,
1298 .follow_link = page_follow_link_light,
1299 .put_link = page_put_link,
1300 };
(deprecated) Btrfs devel tree