1 // SPDX-License-Identifier: GPL-2.0-only
6 * Inode name handling routines for the OSTA-UDF(tm) filesystem.
9 * (C) 1998-2004 Ben Fennema
10 * (C) 1999-2000 Stelias Computing Inc
14 * 12/12/98 blf Created. Split out the lookup code from dir.c
15 * 04/19/99 blf link, mknod, symlink support
22 #include <linux/string.h>
23 #include <linux/errno.h>
25 #include <linux/slab.h>
26 #include <linux/sched.h>
27 #include <linux/crc-itu-t.h>
28 #include <linux/exportfs.h>
29 #include <linux/iversion.h>
31 static inline int udf_match(int len1, const unsigned char *name1, int len2,
32 const unsigned char *name2)
37 return !memcmp(name1, name2, len1);
41 * udf_fiiter_find_entry - find entry in given directory.
43 * @dir: directory inode to search in
44 * @child: qstr of the name
45 * @iter: iter to use for searching
47 * This function searches in the directory @dir for a file name @child. When
48 * found, @iter points to the position in the directory with given entry.
50 * Returns 0 on success, < 0 on error (including -ENOENT).
52 static int udf_fiiter_find_entry(struct inode *dir, const struct qstr *child,
53 struct udf_fileident_iter *iter)
56 unsigned char *fname = NULL;
57 struct super_block *sb = dir->i_sb;
58 int isdotdot = child->len == 2 &&
59 child->name[0] == '.' && child->name[1] == '.';
62 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
66 for (ret = udf_fiiter_init(iter, dir, 0);
67 !ret && iter->pos < dir->i_size;
68 ret = udf_fiiter_advance(iter)) {
69 if (iter->fi.fileCharacteristics & FID_FILE_CHAR_DELETED) {
70 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
74 if (iter->fi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) {
75 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
79 if ((iter->fi.fileCharacteristics & FID_FILE_CHAR_PARENT) &&
83 if (!iter->fi.lengthFileIdent)
86 flen = udf_get_filename(sb, iter->name,
87 iter->fi.lengthFileIdent, fname, UDF_NAME_LEN);
93 if (udf_match(flen, fname, child->len, child->name))
100 udf_fiiter_release(iter);
107 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
110 struct inode *inode = NULL;
111 struct udf_fileident_iter iter;
114 if (dentry->d_name.len > UDF_NAME_LEN)
115 return ERR_PTR(-ENAMETOOLONG);
117 err = udf_fiiter_find_entry(dir, &dentry->d_name, &iter);
118 if (err < 0 && err != -ENOENT)
122 struct kernel_lb_addr loc;
124 loc = lelb_to_cpu(iter.fi.icb.extLocation);
125 udf_fiiter_release(&iter);
127 inode = udf_iget(dir->i_sb, &loc);
130 return d_splice_alias(inode, dentry);
133 static int udf_expand_dir_adinicb(struct inode *inode, udf_pblk_t *block)
136 struct buffer_head *dbh = NULL;
137 struct kernel_lb_addr eloc;
138 struct extent_position epos;
140 struct udf_inode_info *iinfo = UDF_I(inode);
141 struct udf_fileident_iter iter;
145 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
146 alloctype = ICBTAG_FLAG_AD_SHORT;
148 alloctype = ICBTAG_FLAG_AD_LONG;
150 if (!inode->i_size) {
151 iinfo->i_alloc_type = alloctype;
152 mark_inode_dirty(inode);
156 /* alloc block, and copy data to it */
157 *block = udf_new_block(inode->i_sb, inode,
158 iinfo->i_location.partitionReferenceNum,
159 iinfo->i_location.logicalBlockNum, &ret);
162 newblock = udf_get_pblock(inode->i_sb, *block,
163 iinfo->i_location.partitionReferenceNum,
165 if (newblock == 0xffffffff)
166 return -EFSCORRUPTED;
167 dbh = sb_getblk(inode->i_sb, newblock);
171 memcpy(dbh->b_data, iinfo->i_data, inode->i_size);
172 memset(dbh->b_data + inode->i_size, 0,
173 inode->i_sb->s_blocksize - inode->i_size);
174 set_buffer_uptodate(dbh);
177 /* Drop inline data, add block instead */
178 iinfo->i_alloc_type = alloctype;
179 memset(iinfo->i_data + iinfo->i_lenEAttr, 0, iinfo->i_lenAlloc);
180 iinfo->i_lenAlloc = 0;
181 eloc.logicalBlockNum = *block;
182 eloc.partitionReferenceNum =
183 iinfo->i_location.partitionReferenceNum;
184 iinfo->i_lenExtents = inode->i_size;
186 epos.block = iinfo->i_location;
187 epos.offset = udf_file_entry_alloc_offset(inode);
188 ret = udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
192 udf_free_blocks(inode->i_sb, inode, &eloc, 0, 1);
195 mark_inode_dirty(inode);
197 /* Now fixup tags in moved directory entries */
198 for (ret = udf_fiiter_init(&iter, inode, 0);
199 !ret && iter.pos < inode->i_size;
200 ret = udf_fiiter_advance(&iter)) {
201 iter.fi.descTag.tagLocation = cpu_to_le32(*block);
202 if (iter.fi.lengthOfImpUse != cpu_to_le16(0))
203 impuse = dbh->b_data + iter.pos +
204 sizeof(struct fileIdentDesc);
207 udf_fiiter_write_fi(&iter, impuse);
211 * We don't expect the iteration to fail as the directory has been
212 * already verified to be correct
215 udf_fiiter_release(&iter);
220 static int udf_fiiter_add_entry(struct inode *dir, struct dentry *dentry,
221 struct udf_fileident_iter *iter)
223 struct udf_inode_info *dinfo = UDF_I(dir);
224 int nfidlen, namelen = 0;
226 int off, blksize = 1 << dir->i_blkbits;
228 char name[UDF_NAME_LEN_CS0];
231 namelen = udf_put_filename(dir->i_sb, dentry->d_name.name,
233 name, UDF_NAME_LEN_CS0);
235 return -ENAMETOOLONG;
237 nfidlen = ALIGN(sizeof(struct fileIdentDesc) + namelen, UDF_NAME_PAD);
239 for (ret = udf_fiiter_init(iter, dir, 0);
240 !ret && iter->pos < dir->i_size;
241 ret = udf_fiiter_advance(iter)) {
242 if (iter->fi.fileCharacteristics & FID_FILE_CHAR_DELETED) {
243 if (udf_dir_entry_len(&iter->fi) == nfidlen) {
244 iter->fi.descTag.tagSerialNum = cpu_to_le16(1);
245 iter->fi.fileVersionNum = cpu_to_le16(1);
246 iter->fi.fileCharacteristics = 0;
247 iter->fi.lengthFileIdent = namelen;
248 iter->fi.lengthOfImpUse = cpu_to_le16(0);
249 memcpy(iter->namebuf, name, namelen);
250 iter->name = iter->namebuf;
256 udf_fiiter_release(iter);
259 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
260 blksize - udf_ext0_offset(dir) - iter->pos < nfidlen) {
261 udf_fiiter_release(iter);
262 ret = udf_expand_dir_adinicb(dir, &block);
265 ret = udf_fiiter_init(iter, dir, dir->i_size);
270 /* Get blocknumber to use for entry tag */
271 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
272 block = dinfo->i_location.logicalBlockNum;
274 block = iter->eloc.logicalBlockNum +
275 ((iter->elen - 1) >> dir->i_blkbits);
277 off = iter->pos & (blksize - 1);
280 /* Entry fits into current block? */
281 if (blksize - udf_ext0_offset(dir) - off >= nfidlen)
284 ret = udf_fiiter_append_blk(iter);
286 udf_fiiter_release(iter);
290 /* Entry will be completely in the new block? Update tag location... */
291 if (!(iter->pos & (blksize - 1)))
292 block = iter->eloc.logicalBlockNum +
293 ((iter->elen - 1) >> dir->i_blkbits);
295 memset(&iter->fi, 0, sizeof(struct fileIdentDesc));
296 if (UDF_SB(dir->i_sb)->s_udfrev >= 0x0200)
297 udf_new_tag((char *)(&iter->fi), TAG_IDENT_FID, 3, 1, block,
300 udf_new_tag((char *)(&iter->fi), TAG_IDENT_FID, 2, 1, block,
302 iter->fi.fileVersionNum = cpu_to_le16(1);
303 iter->fi.lengthFileIdent = namelen;
304 iter->fi.lengthOfImpUse = cpu_to_le16(0);
305 memcpy(iter->namebuf, name, namelen);
306 iter->name = iter->namebuf;
308 dir->i_size += nfidlen;
309 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
310 dinfo->i_lenAlloc += nfidlen;
312 /* Truncate last extent to proper size */
313 udf_fiiter_update_elen(iter, iter->elen -
314 (dinfo->i_lenExtents - dir->i_size));
316 mark_inode_dirty(dir);
321 static void udf_fiiter_delete_entry(struct udf_fileident_iter *iter)
323 iter->fi.fileCharacteristics |= FID_FILE_CHAR_DELETED;
325 if (UDF_QUERY_FLAG(iter->dir->i_sb, UDF_FLAG_STRICT))
326 memset(&iter->fi.icb, 0x00, sizeof(struct long_ad));
328 udf_fiiter_write_fi(iter, NULL);
331 static void udf_add_fid_counter(struct super_block *sb, bool dir, int val)
333 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
337 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
339 le32_add_cpu(&lvidiu->numDirs, val);
341 le32_add_cpu(&lvidiu->numFiles, val);
342 udf_updated_lvid(sb);
343 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
346 static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
348 struct udf_inode_info *iinfo = UDF_I(inode);
349 struct inode *dir = d_inode(dentry->d_parent);
350 struct udf_fileident_iter iter;
353 err = udf_fiiter_add_entry(dir, dentry, &iter);
355 inode_dec_link_count(inode);
356 discard_new_inode(inode);
359 iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
360 iter.fi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
361 *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
362 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
363 udf_fiiter_write_fi(&iter, NULL);
364 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
365 mark_inode_dirty(dir);
366 udf_fiiter_release(&iter);
367 udf_add_fid_counter(dir->i_sb, false, 1);
368 d_instantiate_new(dentry, inode);
373 static int udf_create(struct mnt_idmap *idmap, struct inode *dir,
374 struct dentry *dentry, umode_t mode, bool excl)
376 struct inode *inode = udf_new_inode(dir, mode);
379 return PTR_ERR(inode);
381 inode->i_data.a_ops = &udf_aops;
382 inode->i_op = &udf_file_inode_operations;
383 inode->i_fop = &udf_file_operations;
384 mark_inode_dirty(inode);
386 return udf_add_nondir(dentry, inode);
389 static int udf_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
390 struct file *file, umode_t mode)
392 struct inode *inode = udf_new_inode(dir, mode);
395 return PTR_ERR(inode);
397 inode->i_data.a_ops = &udf_aops;
398 inode->i_op = &udf_file_inode_operations;
399 inode->i_fop = &udf_file_operations;
400 mark_inode_dirty(inode);
401 d_tmpfile(file, inode);
402 unlock_new_inode(inode);
403 return finish_open_simple(file, 0);
406 static int udf_mknod(struct mnt_idmap *idmap, struct inode *dir,
407 struct dentry *dentry, umode_t mode, dev_t rdev)
411 if (!old_valid_dev(rdev))
414 inode = udf_new_inode(dir, mode);
416 return PTR_ERR(inode);
418 init_special_inode(inode, mode, rdev);
419 return udf_add_nondir(dentry, inode);
422 static int udf_mkdir(struct mnt_idmap *idmap, struct inode *dir,
423 struct dentry *dentry, umode_t mode)
426 struct udf_fileident_iter iter;
428 struct udf_inode_info *dinfo = UDF_I(dir);
429 struct udf_inode_info *iinfo;
431 inode = udf_new_inode(dir, S_IFDIR | mode);
433 return PTR_ERR(inode);
435 iinfo = UDF_I(inode);
436 inode->i_op = &udf_dir_inode_operations;
437 inode->i_fop = &udf_dir_operations;
438 err = udf_fiiter_add_entry(inode, NULL, &iter);
441 discard_new_inode(inode);
445 iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
446 iter.fi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
447 *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
448 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
449 iter.fi.fileCharacteristics =
450 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
451 udf_fiiter_write_fi(&iter, NULL);
452 udf_fiiter_release(&iter);
453 mark_inode_dirty(inode);
455 err = udf_fiiter_add_entry(dir, dentry, &iter);
458 discard_new_inode(inode);
461 iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
462 iter.fi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
463 *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
464 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
465 iter.fi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
466 udf_fiiter_write_fi(&iter, NULL);
467 udf_fiiter_release(&iter);
468 udf_add_fid_counter(dir->i_sb, true, 1);
470 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
471 mark_inode_dirty(dir);
472 d_instantiate_new(dentry, inode);
477 static int empty_dir(struct inode *dir)
479 struct udf_fileident_iter iter;
482 for (ret = udf_fiiter_init(&iter, dir, 0);
483 !ret && iter.pos < dir->i_size;
484 ret = udf_fiiter_advance(&iter)) {
485 if (iter.fi.lengthFileIdent &&
486 !(iter.fi.fileCharacteristics & FID_FILE_CHAR_DELETED)) {
487 udf_fiiter_release(&iter);
491 udf_fiiter_release(&iter);
496 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
499 struct inode *inode = d_inode(dentry);
500 struct udf_fileident_iter iter;
501 struct kernel_lb_addr tloc;
503 ret = udf_fiiter_find_entry(dir, &dentry->d_name, &iter);
508 tloc = lelb_to_cpu(iter.fi.icb.extLocation);
509 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
512 if (!empty_dir(inode))
514 udf_fiiter_delete_entry(&iter);
515 if (inode->i_nlink != 2)
516 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%u)\n",
520 inode_dec_link_count(dir);
521 udf_add_fid_counter(dir->i_sb, true, -1);
522 inode_set_mtime_to_ts(dir,
523 inode_set_ctime_to_ts(dir, inode_set_ctime_current(inode)));
524 mark_inode_dirty(dir);
527 udf_fiiter_release(&iter);
532 static int udf_unlink(struct inode *dir, struct dentry *dentry)
535 struct inode *inode = d_inode(dentry);
536 struct udf_fileident_iter iter;
537 struct kernel_lb_addr tloc;
539 ret = udf_fiiter_find_entry(dir, &dentry->d_name, &iter);
544 tloc = lelb_to_cpu(iter.fi.icb.extLocation);
545 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
548 if (!inode->i_nlink) {
549 udf_debug("Deleting nonexistent file (%lu), %u\n",
550 inode->i_ino, inode->i_nlink);
553 udf_fiiter_delete_entry(&iter);
554 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
555 mark_inode_dirty(dir);
556 inode_dec_link_count(inode);
557 udf_add_fid_counter(dir->i_sb, false, -1);
558 inode_set_ctime_to_ts(inode, inode_get_ctime(dir));
561 udf_fiiter_release(&iter);
566 static int udf_symlink(struct mnt_idmap *idmap, struct inode *dir,
567 struct dentry *dentry, const char *symname)
569 struct inode *inode = udf_new_inode(dir, S_IFLNK | 0777);
570 struct pathComponent *pc;
571 const char *compstart;
572 struct extent_position epos = {};
573 int eoffset, elen = 0;
577 unsigned char *name = NULL;
579 struct udf_inode_info *iinfo;
580 struct super_block *sb = dir->i_sb;
583 return PTR_ERR(inode);
585 iinfo = UDF_I(inode);
586 down_write(&iinfo->i_data_sem);
587 name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
593 inode->i_data.a_ops = &udf_symlink_aops;
594 inode->i_op = &udf_symlink_inode_operations;
595 inode_nohighmem(inode);
597 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
598 struct kernel_lb_addr eloc;
601 block = udf_new_block(sb, inode,
602 iinfo->i_location.partitionReferenceNum,
603 iinfo->i_location.logicalBlockNum, &err);
606 epos.block = iinfo->i_location;
607 epos.offset = udf_file_entry_alloc_offset(inode);
609 eloc.logicalBlockNum = block;
610 eloc.partitionReferenceNum =
611 iinfo->i_location.partitionReferenceNum;
612 bsize = sb->s_blocksize;
613 iinfo->i_lenExtents = bsize;
614 err = udf_add_aext(inode, &epos, &eloc, bsize, 0);
617 udf_free_blocks(sb, inode, &eloc, 0, 1);
621 block = udf_get_pblock(sb, block,
622 iinfo->i_location.partitionReferenceNum,
624 epos.bh = sb_getblk(sb, block);
625 if (unlikely(!epos.bh)) {
627 udf_free_blocks(sb, inode, &eloc, 0, 1);
630 lock_buffer(epos.bh);
631 memset(epos.bh->b_data, 0x00, bsize);
632 set_buffer_uptodate(epos.bh);
633 unlock_buffer(epos.bh);
634 mark_buffer_dirty_inode(epos.bh, inode);
635 ea = epos.bh->b_data + udf_ext0_offset(inode);
637 ea = iinfo->i_data + iinfo->i_lenEAttr;
639 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
640 pc = (struct pathComponent *)ea;
642 if (*symname == '/') {
645 } while (*symname == '/');
647 pc->componentType = 1;
648 pc->lengthComponentIdent = 0;
649 pc->componentFileVersionNum = 0;
650 elen += sizeof(struct pathComponent);
656 if (elen + sizeof(struct pathComponent) > eoffset)
659 pc = (struct pathComponent *)(ea + elen);
665 } while (*symname && *symname != '/');
667 pc->componentType = 5;
668 pc->lengthComponentIdent = 0;
669 pc->componentFileVersionNum = 0;
670 if (compstart[0] == '.') {
671 if ((symname - compstart) == 1)
672 pc->componentType = 4;
673 else if ((symname - compstart) == 2 &&
675 pc->componentType = 3;
678 if (pc->componentType == 5) {
679 namelen = udf_put_filename(sb, compstart,
681 name, UDF_NAME_LEN_CS0);
685 if (elen + sizeof(struct pathComponent) + namelen >
689 pc->lengthComponentIdent = namelen;
691 memcpy(pc->componentIdent, name, namelen);
694 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
699 } while (*symname == '/');
704 inode->i_size = elen;
705 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
706 iinfo->i_lenAlloc = inode->i_size;
708 udf_truncate_tail_extent(inode);
709 mark_inode_dirty(inode);
710 up_write(&iinfo->i_data_sem);
712 err = udf_add_nondir(dentry, inode);
718 up_write(&iinfo->i_data_sem);
719 inode_dec_link_count(inode);
720 discard_new_inode(inode);
724 static int udf_link(struct dentry *old_dentry, struct inode *dir,
725 struct dentry *dentry)
727 struct inode *inode = d_inode(old_dentry);
728 struct udf_fileident_iter iter;
731 err = udf_fiiter_add_entry(dir, dentry, &iter);
734 iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
735 iter.fi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
736 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
737 *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
738 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
740 udf_fiiter_write_fi(&iter, NULL);
741 udf_fiiter_release(&iter);
744 udf_add_fid_counter(dir->i_sb, false, 1);
745 inode_set_ctime_current(inode);
746 mark_inode_dirty(inode);
747 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
748 mark_inode_dirty(dir);
750 d_instantiate(dentry, inode);
755 /* Anybody can rename anything with this: the permission checks are left to the
756 * higher-level routines.
758 static int udf_rename(struct mnt_idmap *idmap, struct inode *old_dir,
759 struct dentry *old_dentry, struct inode *new_dir,
760 struct dentry *new_dentry, unsigned int flags)
762 struct inode *old_inode = d_inode(old_dentry);
763 struct inode *new_inode = d_inode(new_dentry);
764 struct udf_fileident_iter oiter, niter, diriter;
765 bool has_diriter = false, is_dir = false;
767 struct kernel_lb_addr tloc;
769 if (flags & ~RENAME_NOREPLACE)
772 retval = udf_fiiter_find_entry(old_dir, &old_dentry->d_name, &oiter);
776 tloc = lelb_to_cpu(oiter.fi.icb.extLocation);
777 if (udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) != old_inode->i_ino) {
782 if (S_ISDIR(old_inode->i_mode)) {
785 if (!empty_dir(new_inode))
790 if (is_dir && old_dir != new_dir) {
791 retval = udf_fiiter_find_entry(old_inode, &dotdot_name,
793 if (retval == -ENOENT) {
794 udf_err(old_inode->i_sb,
795 "directory (ino %lu) has no '..' entry\n",
797 retval = -EFSCORRUPTED;
802 tloc = lelb_to_cpu(diriter.fi.icb.extLocation);
803 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
805 retval = -EFSCORRUPTED;
806 udf_err(old_inode->i_sb,
807 "directory (ino %lu) has parent entry pointing to another inode (%lu != %u)\n",
808 old_inode->i_ino, old_dir->i_ino,
809 udf_get_lb_pblock(old_inode->i_sb, &tloc, 0));
814 retval = udf_fiiter_find_entry(new_dir, &new_dentry->d_name, &niter);
815 if (retval && retval != -ENOENT)
817 /* Entry found but not passed by VFS? */
818 if (!retval && !new_inode) {
819 retval = -EFSCORRUPTED;
820 udf_fiiter_release(&niter);
823 /* Entry not found? Need to add one... */
825 udf_fiiter_release(&niter);
826 retval = udf_fiiter_add_entry(new_dir, new_dentry, &niter);
832 * Like most other Unix systems, set the ctime for inodes on a
835 inode_set_ctime_current(old_inode);
836 mark_inode_dirty(old_inode);
841 niter.fi.fileVersionNum = oiter.fi.fileVersionNum;
842 niter.fi.fileCharacteristics = oiter.fi.fileCharacteristics;
843 memcpy(&(niter.fi.icb), &(oiter.fi.icb), sizeof(oiter.fi.icb));
844 udf_fiiter_write_fi(&niter, NULL);
845 udf_fiiter_release(&niter);
848 * The old entry may have moved due to new entry allocation. Find it
851 udf_fiiter_release(&oiter);
852 retval = udf_fiiter_find_entry(old_dir, &old_dentry->d_name, &oiter);
854 udf_err(old_dir->i_sb,
855 "failed to find renamed entry again in directory (ino %lu)\n",
858 udf_fiiter_delete_entry(&oiter);
859 udf_fiiter_release(&oiter);
863 inode_set_ctime_current(new_inode);
864 inode_dec_link_count(new_inode);
865 udf_add_fid_counter(old_dir->i_sb, S_ISDIR(new_inode->i_mode),
868 inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir));
869 inode_set_mtime_to_ts(new_dir, inode_set_ctime_current(new_dir));
870 mark_inode_dirty(old_dir);
871 mark_inode_dirty(new_dir);
874 diriter.fi.icb.extLocation =
875 cpu_to_lelb(UDF_I(new_dir)->i_location);
876 udf_update_tag((char *)&diriter.fi,
877 udf_dir_entry_len(&diriter.fi));
878 udf_fiiter_write_fi(&diriter, NULL);
879 udf_fiiter_release(&diriter);
883 inode_dec_link_count(old_dir);
885 inode_dec_link_count(new_inode);
888 mark_inode_dirty(new_dir);
894 udf_fiiter_release(&diriter);
895 udf_fiiter_release(&oiter);
900 static struct dentry *udf_get_parent(struct dentry *child)
902 struct kernel_lb_addr tloc;
903 struct udf_fileident_iter iter;
906 err = udf_fiiter_find_entry(d_inode(child), &dotdot_name, &iter);
910 tloc = lelb_to_cpu(iter.fi.icb.extLocation);
911 udf_fiiter_release(&iter);
912 return d_obtain_alias(udf_iget(child->d_sb, &tloc));
916 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
917 u16 partref, __u32 generation)
920 struct kernel_lb_addr loc;
923 return ERR_PTR(-ESTALE);
925 loc.logicalBlockNum = block;
926 loc.partitionReferenceNum = partref;
927 inode = udf_iget(sb, &loc);
930 return ERR_CAST(inode);
932 if (generation && inode->i_generation != generation) {
934 return ERR_PTR(-ESTALE);
936 return d_obtain_alias(inode);
939 static struct dentry *udf_fh_to_dentry(struct super_block *sb,
940 struct fid *fid, int fh_len, int fh_type)
943 (fh_type != FILEID_UDF_WITH_PARENT &&
944 fh_type != FILEID_UDF_WITHOUT_PARENT))
947 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
948 fid->udf.generation);
951 static struct dentry *udf_fh_to_parent(struct super_block *sb,
952 struct fid *fid, int fh_len, int fh_type)
954 if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
957 return udf_nfs_get_inode(sb, fid->udf.parent_block,
958 fid->udf.parent_partref,
959 fid->udf.parent_generation);
961 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
962 struct inode *parent)
965 struct kernel_lb_addr location = UDF_I(inode)->i_location;
966 struct fid *fid = (struct fid *)fh;
967 int type = FILEID_UDF_WITHOUT_PARENT;
969 if (parent && (len < 5)) {
971 return FILEID_INVALID;
972 } else if (len < 3) {
974 return FILEID_INVALID;
978 fid->udf.block = location.logicalBlockNum;
979 fid->udf.partref = location.partitionReferenceNum;
980 fid->udf.parent_partref = 0;
981 fid->udf.generation = inode->i_generation;
984 location = UDF_I(parent)->i_location;
985 fid->udf.parent_block = location.logicalBlockNum;
986 fid->udf.parent_partref = location.partitionReferenceNum;
987 fid->udf.parent_generation = inode->i_generation;
989 type = FILEID_UDF_WITH_PARENT;
995 const struct export_operations udf_export_ops = {
996 .encode_fh = udf_encode_fh,
997 .fh_to_dentry = udf_fh_to_dentry,
998 .fh_to_parent = udf_fh_to_parent,
999 .get_parent = udf_get_parent,
1002 const struct inode_operations udf_dir_inode_operations = {
1003 .lookup = udf_lookup,
1004 .create = udf_create,
1006 .unlink = udf_unlink,
1007 .symlink = udf_symlink,
1011 .rename = udf_rename,
1012 .tmpfile = udf_tmpfile,