5 * Inode name handling routines for the OSTA-UDF(tm) filesystem.
8 * E-mail regarding any portion of the Linux UDF file system should be
9 * directed to the development team mailing list (run by majordomo):
10 * linux_udf@hpesjro.fc.hp.com
13 * This file is distributed under the terms of the GNU General Public
14 * License (GPL). Copies of the GPL can be obtained from:
15 * ftp://prep.ai.mit.edu/pub/gnu/GPL
16 * Each contributing author retains all rights to their own work.
18 * (C) 1998-2004 Ben Fennema
19 * (C) 1999-2000 Stelias Computing Inc
23 * 12/12/98 blf Created. Split out the lookup code from dir.c
24 * 04/19/99 blf link, mknod, symlink support
31 #include <linux/string.h>
32 #include <linux/errno.h>
34 #include <linux/slab.h>
35 #include <linux/quotaops.h>
36 #include <linux/smp_lock.h>
37 #include <linux/buffer_head.h>
39 static inline int udf_match(int len1, const char *name1, int len2, const char *name2)
43 return !memcmp(name1, name2, len1);
46 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
47 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
48 uint8_t *impuse, uint8_t *fileident)
50 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
55 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
56 uint8_t lfi = cfi->lengthFileIdent;
57 int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
58 sizeof(struct fileIdentDesc);
61 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
64 offset = fibh->soffset + sizeof(struct fileIdentDesc);
68 if (adinicb || (offset + liu < 0))
69 memcpy((uint8_t *)sfi->impUse, impuse, liu);
71 memcpy(fibh->ebh->b_data + offset, impuse, liu);
74 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
75 memcpy(fibh->ebh->b_data, impuse - offset, liu + offset);
83 if (adinicb || (offset + lfi < 0))
84 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
86 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
89 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, -offset);
90 memcpy(fibh->ebh->b_data, fileident - offset, lfi + offset);
96 if (adinicb || (offset + padlen < 0))
97 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
99 memset(fibh->ebh->b_data + offset, 0x00, padlen);
102 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
103 memset(fibh->ebh->b_data, 0x00, padlen + offset);
106 crc = udf_crc((uint8_t *)cfi + sizeof(tag), sizeof(struct fileIdentDesc) -
109 if (fibh->sbh == fibh->ebh)
110 crc = udf_crc((uint8_t *)sfi->impUse,
111 crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
112 else if (sizeof(struct fileIdentDesc) >= -fibh->soffset)
113 crc = udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + fibh->soffset,
114 crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
117 crc = udf_crc((uint8_t *)sfi->impUse,
118 -fibh->soffset - sizeof(struct fileIdentDesc), crc);
119 crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
122 cfi->descTag.descCRC = cpu_to_le16(crc);
123 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
127 checksum += ((uint8_t *)&cfi->descTag)[i];
129 cfi->descTag.tagChecksum = checksum;
130 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset))
131 memcpy((uint8_t *)sfi, (uint8_t *)cfi, sizeof(struct fileIdentDesc));
134 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
135 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
136 sizeof(struct fileIdentDesc) + fibh->soffset);
140 mark_inode_dirty(inode);
143 if (fibh->sbh != fibh->ebh)
144 mark_buffer_dirty_inode(fibh->ebh, inode);
145 mark_buffer_dirty_inode(fibh->sbh, inode);
150 static struct fileIdentDesc *
151 udf_find_entry(struct inode *dir, struct dentry *dentry,
152 struct udf_fileident_bh *fibh,
153 struct fileIdentDesc *cfi)
155 struct fileIdentDesc *fi=NULL;
158 char fname[UDF_NAME_LEN];
163 kernel_lb_addr bloc, eloc;
164 uint32_t extoffset, elen, offset;
165 struct buffer_head *bh = NULL;
167 size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
168 f_pos = (udf_ext0_offset(dir) >> 2);
170 fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
171 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
172 fibh->sbh = fibh->ebh = NULL;
173 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
174 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
176 offset >>= dir->i_sb->s_blocksize_bits;
177 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
178 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
180 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
181 extoffset -= sizeof(short_ad);
182 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
183 extoffset -= sizeof(long_ad);
188 if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
190 udf_release_data(bh);
196 udf_release_data(bh);
200 while ( (f_pos < size) )
202 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
206 if (fibh->sbh != fibh->ebh)
207 udf_release_data(fibh->ebh);
208 udf_release_data(fibh->sbh);
209 udf_release_data(bh);
213 liu = le16_to_cpu(cfi->lengthOfImpUse);
214 lfi = cfi->lengthFileIdent;
216 if (fibh->sbh == fibh->ebh)
218 nameptr = fi->fileIdent + liu;
222 int poffset; /* Unpaded ending offset */
224 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
227 nameptr = (uint8_t *)(fibh->ebh->b_data + poffset - lfi);
231 memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
232 memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
236 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
238 if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) )
242 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 )
244 if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) )
251 if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)))
253 if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
255 udf_release_data(bh);
260 if (fibh->sbh != fibh->ebh)
261 udf_release_data(fibh->ebh);
262 udf_release_data(fibh->sbh);
263 udf_release_data(bh);
271 * Look-up the inode for a given name.
274 * Required - lookup_dentry() will return -ENOTDIR if this routine is not
275 * available for a directory. The filesystem is useless if this routine is
276 * not available for at least the filesystem's root directory.
278 * This routine is passed an incomplete dentry - it must be completed by
279 * calling d_add(dentry, inode). If the name does not exist, then the
280 * specified inode must be set to null. An error should only be returned
281 * when the lookup fails for a reason other than the name not existing.
282 * Note that the directory inode semaphore is held during the call.
284 * Refer to lookup_dentry() in fs/namei.c
285 * lookup_dentry() -> lookup() -> real_lookup() -> .
288 * dir Pointer to inode of parent directory.
289 * dentry Pointer to dentry to complete.
290 * nd Pointer to lookup nameidata
293 * <return> Zero on success.
296 * July 1, 1997 - Andrew E. Mileski
297 * Written, tested, and released.
300 static struct dentry *
301 udf_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
303 struct inode *inode = NULL;
304 struct fileIdentDesc cfi, *fi;
305 struct udf_fileident_bh fibh;
307 if (dentry->d_name.len > UDF_NAME_LEN-2)
308 return ERR_PTR(-ENAMETOOLONG);
312 /* temporary shorthand for specifying files by inode number */
313 if (!strncmp(dentry->d_name.name, ".B=", 3) )
315 kernel_lb_addr lb = { 0, simple_strtoul(dentry->d_name.name+3, NULL, 0) };
316 inode = udf_iget(dir->i_sb, lb);
320 return ERR_PTR(-EACCES);
324 #endif /* UDF_RECOVERY */
326 if ((fi = udf_find_entry(dir, dentry, &fibh, &cfi)))
328 if (fibh.sbh != fibh.ebh)
329 udf_release_data(fibh.ebh);
330 udf_release_data(fibh.sbh);
332 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
336 return ERR_PTR(-EACCES);
340 d_add(dentry, inode);
344 static struct fileIdentDesc *
345 udf_add_entry(struct inode *dir, struct dentry *dentry,
346 struct udf_fileident_bh *fibh,
347 struct fileIdentDesc *cfi, int *err)
349 struct super_block *sb;
350 struct fileIdentDesc *fi=NULL;
351 char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
356 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
361 kernel_lb_addr bloc, eloc;
362 uint32_t extoffset, elen, offset;
363 struct buffer_head *bh = NULL;
369 if (!dentry->d_name.len)
375 if ( !(namelen = udf_put_filename(sb, dentry->d_name.name, name, dentry->d_name.len)))
377 *err = -ENAMETOOLONG;
384 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
386 f_pos = (udf_ext0_offset(dir) >> 2);
388 fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
389 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
390 fibh->sbh = fibh->ebh = NULL;
391 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
392 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
394 offset >>= dir->i_sb->s_blocksize_bits;
395 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
396 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
398 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
399 extoffset -= sizeof(short_ad);
400 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
401 extoffset -= sizeof(long_ad);
406 if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
408 udf_release_data(bh);
413 block = UDF_I_LOCATION(dir).logicalBlockNum;
418 block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0);
419 fibh->sbh = fibh->ebh = NULL;
420 fibh->soffset = fibh->eoffset = sb->s_blocksize;
424 while ( (f_pos < size) )
426 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
430 if (fibh->sbh != fibh->ebh)
431 udf_release_data(fibh->ebh);
432 udf_release_data(fibh->sbh);
433 udf_release_data(bh);
438 liu = le16_to_cpu(cfi->lengthOfImpUse);
439 lfi = cfi->lengthFileIdent;
441 if (fibh->sbh == fibh->ebh)
442 nameptr = fi->fileIdent + liu;
445 int poffset; /* Unpaded ending offset */
447 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
450 nameptr = (char *)(fibh->ebh->b_data + poffset - lfi);
454 memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
455 memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
459 if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
461 if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen)
463 udf_release_data(bh);
464 cfi->descTag.tagSerialNum = cpu_to_le16(1);
465 cfi->fileVersionNum = cpu_to_le16(1);
466 cfi->fileCharacteristics = 0;
467 cfi->lengthFileIdent = namelen;
468 cfi->lengthOfImpUse = cpu_to_le16(0);
469 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
482 if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) &&
483 udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
485 if (fibh->sbh != fibh->ebh)
486 udf_release_data(fibh->ebh);
487 udf_release_data(fibh->sbh);
488 udf_release_data(bh);
497 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB &&
498 sb->s_blocksize - fibh->eoffset < nfidlen)
500 udf_release_data(bh);
502 fibh->soffset -= udf_ext0_offset(dir);
503 fibh->eoffset -= udf_ext0_offset(dir);
504 f_pos -= (udf_ext0_offset(dir) >> 2);
505 if (fibh->sbh != fibh->ebh)
506 udf_release_data(fibh->ebh);
507 udf_release_data(fibh->sbh);
508 if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err)))
510 bloc = UDF_I_LOCATION(dir);
511 eloc.logicalBlockNum = block;
512 eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;
513 elen = dir->i_sb->s_blocksize;
514 extoffset = udf_file_entry_alloc_offset(dir);
515 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
516 extoffset += sizeof(short_ad);
517 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
518 extoffset += sizeof(long_ad);
521 if (sb->s_blocksize - fibh->eoffset >= nfidlen)
523 fibh->soffset = fibh->eoffset;
524 fibh->eoffset += nfidlen;
525 if (fibh->sbh != fibh->ebh)
527 udf_release_data(fibh->sbh);
528 fibh->sbh = fibh->ebh;
531 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
533 block = UDF_I_LOCATION(dir).logicalBlockNum;
534 fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - udf_ext0_offset(dir) + UDF_I_LENEATTR(dir));
538 block = eloc.logicalBlockNum + ((elen - 1) >>
539 dir->i_sb->s_blocksize_bits);
540 fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset);
545 fibh->soffset = fibh->eoffset - sb->s_blocksize;
546 fibh->eoffset += nfidlen - sb->s_blocksize;
547 if (fibh->sbh != fibh->ebh)
549 udf_release_data(fibh->sbh);
550 fibh->sbh = fibh->ebh;
553 block = eloc.logicalBlockNum + ((elen - 1) >>
554 dir->i_sb->s_blocksize_bits);
556 if (!(fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err)))
558 udf_release_data(bh);
559 udf_release_data(fibh->sbh);
563 if (!(fibh->soffset))
565 if (udf_next_aext(dir, &bloc, &extoffset, &eloc, &elen, &bh, 1) ==
566 (EXT_RECORDED_ALLOCATED >> 30))
568 block = eloc.logicalBlockNum + ((elen - 1) >>
569 dir->i_sb->s_blocksize_bits);
574 udf_release_data(fibh->sbh);
575 fibh->sbh = fibh->ebh;
576 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
580 fi = (struct fileIdentDesc *)
581 (fibh->sbh->b_data + sb->s_blocksize + fibh->soffset);
585 memset(cfi, 0, sizeof(struct fileIdentDesc));
586 if (UDF_SB_UDFREV(sb) >= 0x0200)
587 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag));
589 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag));
590 cfi->fileVersionNum = cpu_to_le16(1);
591 cfi->lengthFileIdent = namelen;
592 cfi->lengthOfImpUse = cpu_to_le16(0);
593 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
595 udf_release_data(bh);
596 dir->i_size += nfidlen;
597 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
598 UDF_I_LENALLOC(dir) += nfidlen;
599 mark_inode_dirty(dir);
604 udf_release_data(bh);
605 if (fibh->sbh != fibh->ebh)
606 udf_release_data(fibh->ebh);
607 udf_release_data(fibh->sbh);
613 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
614 struct udf_fileident_bh *fibh, struct fileIdentDesc *cfi)
616 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
617 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
618 memset(&(cfi->icb), 0x00, sizeof(long_ad));
619 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
622 static int udf_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
624 struct udf_fileident_bh fibh;
626 struct fileIdentDesc cfi, *fi;
630 inode = udf_new_inode(dir, mode, &err);
637 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
638 inode->i_data.a_ops = &udf_adinicb_aops;
640 inode->i_data.a_ops = &udf_aops;
641 inode->i_op = &udf_file_inode_operations;
642 inode->i_fop = &udf_file_operations;
643 inode->i_mode = mode;
644 mark_inode_dirty(inode);
646 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
649 mark_inode_dirty(inode);
654 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
655 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
656 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
657 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
658 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
659 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
661 mark_inode_dirty(dir);
663 if (fibh.sbh != fibh.ebh)
664 udf_release_data(fibh.ebh);
665 udf_release_data(fibh.sbh);
667 d_instantiate(dentry, inode);
671 static int udf_mknod(struct inode * dir, struct dentry * dentry, int mode, dev_t rdev)
673 struct inode * inode;
674 struct udf_fileident_bh fibh;
675 struct fileIdentDesc cfi, *fi;
678 if (!old_valid_dev(rdev))
683 inode = udf_new_inode(dir, mode, &err);
687 inode->i_uid = current->fsuid;
688 init_special_inode(inode, mode, rdev);
689 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
692 mark_inode_dirty(inode);
697 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
698 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
699 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
700 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
701 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
702 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
704 mark_inode_dirty(dir);
706 mark_inode_dirty(inode);
708 if (fibh.sbh != fibh.ebh)
709 udf_release_data(fibh.ebh);
710 udf_release_data(fibh.sbh);
711 d_instantiate(dentry, inode);
718 static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode)
720 struct inode * inode;
721 struct udf_fileident_bh fibh;
722 struct fileIdentDesc cfi, *fi;
727 if (dir->i_nlink >= (256<<sizeof(dir->i_nlink))-1)
731 inode = udf_new_inode(dir, S_IFDIR, &err);
735 inode->i_op = &udf_dir_inode_operations;
736 inode->i_fop = &udf_dir_operations;
737 if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err)))
740 mark_inode_dirty(inode);
745 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
746 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir));
747 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
748 cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL);
749 cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
750 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
751 udf_release_data(fibh.sbh);
752 inode->i_mode = S_IFDIR | mode;
753 if (dir->i_mode & S_ISGID)
754 inode->i_mode |= S_ISGID;
755 mark_inode_dirty(inode);
757 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
760 mark_inode_dirty(inode);
764 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
765 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
766 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
767 cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
768 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
769 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
771 mark_inode_dirty(dir);
772 d_instantiate(dentry, inode);
773 if (fibh.sbh != fibh.ebh)
774 udf_release_data(fibh.ebh);
775 udf_release_data(fibh.sbh);
782 static int empty_dir(struct inode *dir)
784 struct fileIdentDesc *fi, cfi;
785 struct udf_fileident_bh fibh;
787 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
789 kernel_lb_addr bloc, eloc;
790 uint32_t extoffset, elen, offset;
791 struct buffer_head *bh = NULL;
793 f_pos = (udf_ext0_offset(dir) >> 2);
795 fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
797 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
798 fibh.sbh = fibh.ebh = NULL;
799 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
800 &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
802 offset >>= dir->i_sb->s_blocksize_bits;
803 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
804 if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
806 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
807 extoffset -= sizeof(short_ad);
808 else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
809 extoffset -= sizeof(long_ad);
814 if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block)))
816 udf_release_data(bh);
822 udf_release_data(bh);
827 while ( (f_pos < size) )
829 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
833 if (fibh.sbh != fibh.ebh)
834 udf_release_data(fibh.ebh);
835 udf_release_data(fibh.sbh);
836 udf_release_data(bh);
840 if (cfi.lengthFileIdent && (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0)
842 if (fibh.sbh != fibh.ebh)
843 udf_release_data(fibh.ebh);
844 udf_release_data(fibh.sbh);
845 udf_release_data(bh);
849 if (fibh.sbh != fibh.ebh)
850 udf_release_data(fibh.ebh);
851 udf_release_data(fibh.sbh);
852 udf_release_data(bh);
856 static int udf_rmdir(struct inode * dir, struct dentry * dentry)
859 struct inode * inode = dentry->d_inode;
860 struct udf_fileident_bh fibh;
861 struct fileIdentDesc *fi, cfi;
866 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
871 tloc = lelb_to_cpu(cfi.icb.extLocation);
872 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
875 if (!empty_dir(inode))
877 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
880 if (inode->i_nlink != 2)
881 udf_warning(inode->i_sb, "udf_rmdir",
882 "empty directory has nlink != 2 (%d)",
886 mark_inode_dirty(inode);
888 inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
889 mark_inode_dirty(dir);
892 if (fibh.sbh != fibh.ebh)
893 udf_release_data(fibh.ebh);
894 udf_release_data(fibh.sbh);
900 static int udf_unlink(struct inode * dir, struct dentry * dentry)
903 struct inode * inode = dentry->d_inode;
904 struct udf_fileident_bh fibh;
905 struct fileIdentDesc *fi;
906 struct fileIdentDesc cfi;
911 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
916 tloc = lelb_to_cpu(cfi.icb.extLocation);
917 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
922 udf_debug("Deleting nonexistent file (%lu), %d\n",
923 inode->i_ino, inode->i_nlink);
926 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
929 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
930 mark_inode_dirty(dir);
932 mark_inode_dirty(inode);
933 inode->i_ctime = dir->i_ctime;
937 if (fibh.sbh != fibh.ebh)
938 udf_release_data(fibh.ebh);
939 udf_release_data(fibh.sbh);
945 static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * symname)
947 struct inode * inode;
948 struct pathComponent *pc;
950 struct udf_fileident_bh fibh;
951 struct buffer_head *bh = NULL;
952 int eoffset, elen = 0;
953 struct fileIdentDesc *fi;
954 struct fileIdentDesc cfi;
958 char name[UDF_NAME_LEN];
962 if (!(inode = udf_new_inode(dir, S_IFLNK, &err)))
965 inode->i_mode = S_IFLNK | S_IRWXUGO;
966 inode->i_data.a_ops = &udf_symlink_aops;
967 inode->i_op = &page_symlink_inode_operations;
969 if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB)
971 struct buffer_head *bh = NULL;
972 kernel_lb_addr bloc, eloc;
973 uint32_t elen, extoffset;
975 block = udf_new_block(inode->i_sb, inode,
976 UDF_I_LOCATION(inode).partitionReferenceNum,
977 UDF_I_LOCATION(inode).logicalBlockNum, &err);
980 bloc = UDF_I_LOCATION(inode);
981 eloc.logicalBlockNum = block;
982 eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
983 elen = inode->i_sb->s_blocksize;
984 UDF_I_LENEXTENTS(inode) = elen;
985 extoffset = udf_file_entry_alloc_offset(inode);
986 udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 0);
987 udf_release_data(bh);
989 block = udf_get_pblock(inode->i_sb, block,
990 UDF_I_LOCATION(inode).partitionReferenceNum, 0);
991 bh = udf_tread(inode->i_sb, block);
993 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
994 set_buffer_uptodate(bh);
996 mark_buffer_dirty_inode(bh, inode);
997 ea = bh->b_data + udf_ext0_offset(inode);
1000 ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode);
1002 eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
1003 pc = (struct pathComponent *)ea;
1005 if (*symname == '/')
1010 } while (*symname == '/');
1012 pc->componentType = 1;
1013 pc->lengthComponentIdent = 0;
1014 pc->componentFileVersionNum = 0;
1015 pc += sizeof(struct pathComponent);
1016 elen += sizeof(struct pathComponent);
1019 err = -ENAMETOOLONG;
1023 if (elen + sizeof(struct pathComponent) > eoffset)
1026 pc = (struct pathComponent *)(ea + elen);
1028 compstart = (char *)symname;
1033 } while (*symname && *symname != '/');
1035 pc->componentType = 5;
1036 pc->lengthComponentIdent = 0;
1037 pc->componentFileVersionNum = 0;
1038 if (compstart[0] == '.')
1040 if ((symname-compstart) == 1)
1041 pc->componentType = 4;
1042 else if ((symname-compstart) == 2 && compstart[1] == '.')
1043 pc->componentType = 3;
1046 if (pc->componentType == 5)
1048 if ( !(namelen = udf_put_filename(inode->i_sb, compstart, name, symname-compstart)))
1051 if (elen + sizeof(struct pathComponent) + namelen > eoffset)
1054 pc->lengthComponentIdent = namelen;
1056 memcpy(pc->componentIdent, name, namelen);
1059 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1066 } while (*symname == '/');
1070 udf_release_data(bh);
1071 inode->i_size = elen;
1072 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
1073 UDF_I_LENALLOC(inode) = inode->i_size;
1074 mark_inode_dirty(inode);
1076 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
1078 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1079 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
1080 if (UDF_SB_LVIDBH(inode->i_sb))
1082 struct logicalVolHeaderDesc *lvhd;
1084 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
1085 uniqueID = le64_to_cpu(lvhd->uniqueID);
1086 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1087 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1088 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1090 lvhd->uniqueID = cpu_to_le64(uniqueID);
1091 mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
1093 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1094 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1096 mark_inode_dirty(dir);
1098 if (fibh.sbh != fibh.ebh)
1099 udf_release_data(fibh.ebh);
1100 udf_release_data(fibh.sbh);
1101 d_instantiate(dentry, inode);
1110 mark_inode_dirty(inode);
1115 static int udf_link(struct dentry * old_dentry, struct inode * dir,
1116 struct dentry *dentry)
1118 struct inode *inode = old_dentry->d_inode;
1119 struct udf_fileident_bh fibh;
1120 struct fileIdentDesc cfi, *fi;
1124 if (inode->i_nlink >= (256<<sizeof(inode->i_nlink))-1)
1130 if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
1135 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1136 cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
1137 if (UDF_SB_LVIDBH(inode->i_sb))
1139 struct logicalVolHeaderDesc *lvhd;
1141 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
1142 uniqueID = le64_to_cpu(lvhd->uniqueID);
1143 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1144 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1145 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1147 lvhd->uniqueID = cpu_to_le64(uniqueID);
1148 mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
1150 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1151 if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
1153 mark_inode_dirty(dir);
1155 if (fibh.sbh != fibh.ebh)
1156 udf_release_data(fibh.ebh);
1157 udf_release_data(fibh.sbh);
1159 inode->i_ctime = current_fs_time(inode->i_sb);
1160 mark_inode_dirty(inode);
1161 atomic_inc(&inode->i_count);
1162 d_instantiate(dentry, inode);
1167 /* Anybody can rename anything with this: the permission checks are left to the
1168 * higher-level routines.
1170 static int udf_rename (struct inode * old_dir, struct dentry * old_dentry,
1171 struct inode * new_dir, struct dentry * new_dentry)
1173 struct inode * old_inode = old_dentry->d_inode;
1174 struct inode * new_inode = new_dentry->d_inode;
1175 struct udf_fileident_bh ofibh, nfibh;
1176 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi;
1177 struct buffer_head *dir_bh = NULL;
1178 int retval = -ENOENT;
1179 kernel_lb_addr tloc;
1182 if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi)))
1184 if (ofibh.sbh != ofibh.ebh)
1185 udf_release_data(ofibh.ebh);
1186 udf_release_data(ofibh.sbh);
1188 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1189 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1190 != old_inode->i_ino)
1193 nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1198 if (nfibh.sbh != nfibh.ebh)
1199 udf_release_data(nfibh.ebh);
1200 udf_release_data(nfibh.sbh);
1204 if (S_ISDIR(old_inode->i_mode))
1206 uint32_t offset = udf_ext0_offset(old_inode);
1210 retval = -ENOTEMPTY;
1211 if (!empty_dir(new_inode))
1215 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
1217 dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) -
1218 (UDF_I_EFE(old_inode) ?
1219 sizeof(struct extendedFileEntry) :
1220 sizeof(struct fileEntry)),
1221 old_inode->i_sb->s_blocksize, &offset);
1225 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1228 dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset);
1232 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1233 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0)
1238 if (!new_inode && new_dir->i_nlink >= (256<<sizeof(new_dir->i_nlink))-1)
1243 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval);
1249 * Like most other Unix systems, set the ctime for inodes on a
1252 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1253 mark_inode_dirty(old_inode);
1258 ncfi.fileVersionNum = ocfi.fileVersionNum;
1259 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1260 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1261 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1263 /* The old fid may have moved - find it again */
1264 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1265 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1269 new_inode->i_nlink--;
1270 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1271 mark_inode_dirty(new_inode);
1273 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1274 mark_inode_dirty(old_dir);
1278 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir));
1279 udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) +
1280 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1281 if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
1283 mark_inode_dirty(old_inode);
1286 mark_buffer_dirty_inode(dir_bh, old_inode);
1287 old_dir->i_nlink --;
1288 mark_inode_dirty(old_dir);
1291 new_inode->i_nlink --;
1292 mark_inode_dirty(new_inode);
1296 new_dir->i_nlink ++;
1297 mark_inode_dirty(new_dir);
1303 if (ofibh.sbh != ofibh.ebh)
1304 udf_release_data(ofibh.ebh);
1305 udf_release_data(ofibh.sbh);
1311 udf_release_data(dir_bh);
1314 if (nfibh.sbh != nfibh.ebh)
1315 udf_release_data(nfibh.ebh);
1316 udf_release_data(nfibh.sbh);
1322 struct inode_operations udf_dir_inode_operations = {
1323 .lookup = udf_lookup,
1324 .create = udf_create,
1326 .unlink = udf_unlink,
1327 .symlink = udf_symlink,
1331 .rename = udf_rename,