5 * Inode name handling routines for the OSTA-UDF(tm) filesystem.
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.
13 * (C) 1998-2004 Ben Fennema
14 * (C) 1999-2000 Stelias Computing Inc
18 * 12/12/98 blf Created. Split out the lookup code from dir.c
19 * 04/19/99 blf link, mknod, symlink support
26 #include <linux/string.h>
27 #include <linux/errno.h>
29 #include <linux/slab.h>
30 #include <linux/quotaops.h>
31 #include <linux/smp_lock.h>
32 #include <linux/buffer_head.h>
33 #include <linux/sched.h>
35 static inline int udf_match(int len1, const char *name1, int len2,
41 return !memcmp(name1, name2, len1);
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)
48 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
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);
57 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
60 offset = fibh->soffset + sizeof(struct fileIdentDesc);
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);
68 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
69 memcpy(fibh->ebh->b_data, impuse - offset,
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);
82 memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
84 memcpy(fibh->ebh->b_data, fileident - offset,
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);
96 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
97 memset(fibh->ebh->b_data, 0x00, padlen + offset);
100 crc = udf_crc((uint8_t *)cfi + sizeof(tag),
101 sizeof(struct fileIdentDesc) - sizeof(tag), 0);
103 if (fibh->sbh == fibh->ebh) {
104 crc = udf_crc((uint8_t *)sfi->impUse,
105 crclen + sizeof(tag) -
106 sizeof(struct fileIdentDesc), crc);
107 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
108 crc = udf_crc(fibh->ebh->b_data +
109 sizeof(struct fileIdentDesc) +
111 crclen + sizeof(tag) -
112 sizeof(struct fileIdentDesc),
115 crc = udf_crc((uint8_t *)sfi->impUse,
116 -fibh->soffset - sizeof(struct fileIdentDesc),
118 crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
121 cfi->descTag.descCRC = cpu_to_le16(crc);
122 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
123 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
125 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
126 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
127 sizeof(struct fileIdentDesc));
129 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
130 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
131 sizeof(struct fileIdentDesc) + fibh->soffset);
135 mark_inode_dirty(inode);
137 if (fibh->sbh != fibh->ebh)
138 mark_buffer_dirty_inode(fibh->ebh, inode);
139 mark_buffer_dirty_inode(fibh->sbh, inode);
144 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
145 struct dentry *dentry,
146 struct udf_fileident_bh *fibh,
147 struct fileIdentDesc *cfi)
149 struct fileIdentDesc *fi = NULL;
152 char fname[UDF_NAME_LEN];
160 struct extent_position epos = {};
161 struct udf_inode_info *dinfo = UDF_I(dir);
163 size = udf_ext0_offset(dir) + dir->i_size;
164 f_pos = udf_ext0_offset(dir);
166 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
167 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
168 fibh->sbh = fibh->ebh = NULL;
169 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
170 &epos, &eloc, &elen, &offset) ==
171 (EXT_RECORDED_ALLOCATED >> 30)) {
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(short_ad);
176 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
177 epos.offset -= sizeof(long_ad);
181 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
191 while (f_pos < size) {
192 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
195 if (fibh->sbh != fibh->ebh)
202 liu = le16_to_cpu(cfi->lengthOfImpUse);
203 lfi = cfi->lengthFileIdent;
205 if (fibh->sbh == fibh->ebh) {
206 nameptr = fi->fileIdent + liu;
208 int poffset; /* Unpaded ending offset */
210 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
214 nameptr = (uint8_t *)(fibh->ebh->b_data +
218 memcpy(nameptr, fi->fileIdent + liu,
220 memcpy(nameptr + lfi - poffset,
221 fibh->ebh->b_data, poffset);
225 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
226 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
230 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
231 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
238 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
239 if (flen && udf_match(flen, fname, dentry->d_name.len,
240 dentry->d_name.name)) {
246 if (fibh->sbh != fibh->ebh)
254 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
255 struct nameidata *nd)
257 struct inode *inode = NULL;
258 struct fileIdentDesc cfi;
259 struct udf_fileident_bh fibh;
261 if (dentry->d_name.len > UDF_NAME_LEN - 2)
262 return ERR_PTR(-ENAMETOOLONG);
266 /* temporary shorthand for specifying files by inode number */
267 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
268 kernel_lb_addr lb = {
269 .logicalBlockNum = 0,
270 .partitionReferenceNum =
271 simple_strtoul(dentry->d_name.name + 3,
274 inode = udf_iget(dir->i_sb, lb);
277 return ERR_PTR(-EACCES);
280 #endif /* UDF_RECOVERY */
282 if (udf_find_entry(dir, dentry, &fibh, &cfi)) {
283 if (fibh.sbh != fibh.ebh)
287 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
290 return ERR_PTR(-EACCES);
294 d_add(dentry, inode);
299 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
300 struct dentry *dentry,
301 struct udf_fileident_bh *fibh,
302 struct fileIdentDesc *cfi, int *err)
304 struct super_block *sb = dir->i_sb;
305 struct fileIdentDesc *fi = NULL;
306 char name[UDF_NAME_LEN];
309 loff_t size = udf_ext0_offset(dir) + dir->i_size;
317 struct extent_position epos = {};
318 struct udf_inode_info *dinfo;
321 if (!dentry->d_name.len) {
325 namelen = udf_put_filename(sb, dentry->d_name.name, name,
328 *err = -ENAMETOOLONG;
335 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
337 f_pos = udf_ext0_offset(dir);
339 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
341 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
342 fibh->sbh = fibh->ebh = NULL;
343 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
344 &epos, &eloc, &elen, &offset) ==
345 (EXT_RECORDED_ALLOCATED >> 30)) {
346 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
347 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
348 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
349 epos.offset -= sizeof(short_ad);
350 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
351 epos.offset -= sizeof(long_ad);
355 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
362 block = dinfo->i_location.logicalBlockNum;
364 block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0);
365 fibh->sbh = fibh->ebh = NULL;
366 fibh->soffset = fibh->eoffset = sb->s_blocksize;
370 while (f_pos < size) {
371 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
375 if (fibh->sbh != fibh->ebh)
383 liu = le16_to_cpu(cfi->lengthOfImpUse);
384 lfi = cfi->lengthFileIdent;
386 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
387 if (((sizeof(struct fileIdentDesc) +
388 liu + lfi + 3) & ~3) == nfidlen) {
390 cfi->descTag.tagSerialNum = cpu_to_le16(1);
391 cfi->fileVersionNum = cpu_to_le16(1);
392 cfi->fileCharacteristics = 0;
393 cfi->lengthFileIdent = namelen;
394 cfi->lengthOfImpUse = cpu_to_le16(0);
395 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
407 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
408 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
409 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
410 epos.offset -= sizeof(short_ad);
411 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
412 epos.offset -= sizeof(long_ad);
413 udf_write_aext(dir, &epos, eloc, elen, 1);
417 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
418 sb->s_blocksize - fibh->eoffset < nfidlen) {
421 fibh->soffset -= udf_ext0_offset(dir);
422 fibh->eoffset -= udf_ext0_offset(dir);
423 f_pos -= udf_ext0_offset(dir);
424 if (fibh->sbh != fibh->ebh)
427 fibh->sbh = fibh->ebh =
428 udf_expand_dir_adinicb(dir, &block, err);
431 epos.block = dinfo->i_location;
432 epos.offset = udf_file_entry_alloc_offset(dir);
433 /* Load extent udf_expand_dir_adinicb() has created */
434 udf_current_aext(dir, &epos, &eloc, &elen, 1);
437 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
438 fibh->soffset = fibh->eoffset;
439 fibh->eoffset += nfidlen;
440 if (fibh->sbh != fibh->ebh) {
442 fibh->sbh = fibh->ebh;
445 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
446 block = dinfo->i_location.logicalBlockNum;
447 fi = (struct fileIdentDesc *)
448 (dinfo->i_ext.i_data +
450 udf_ext0_offset(dir) +
453 block = eloc.logicalBlockNum +
455 dir->i_sb->s_blocksize_bits);
456 fi = (struct fileIdentDesc *)
457 (fibh->sbh->b_data + fibh->soffset);
460 fibh->soffset = fibh->eoffset - sb->s_blocksize;
461 fibh->eoffset += nfidlen - sb->s_blocksize;
462 if (fibh->sbh != fibh->ebh) {
464 fibh->sbh = fibh->ebh;
467 block = eloc.logicalBlockNum + ((elen - 1) >>
468 dir->i_sb->s_blocksize_bits);
469 fibh->ebh = udf_bread(dir,
470 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
477 if (!fibh->soffset) {
478 if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
479 (EXT_RECORDED_ALLOCATED >> 30)) {
480 block = eloc.logicalBlockNum + ((elen - 1) >>
481 dir->i_sb->s_blocksize_bits);
486 fibh->sbh = fibh->ebh;
487 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
489 fi = (struct fileIdentDesc *)
490 (fibh->sbh->b_data + sb->s_blocksize +
495 memset(cfi, 0, sizeof(struct fileIdentDesc));
496 if (UDF_SB(sb)->s_udfrev >= 0x0200)
497 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
500 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
502 cfi->fileVersionNum = cpu_to_le16(1);
503 cfi->lengthFileIdent = namelen;
504 cfi->lengthOfImpUse = cpu_to_le16(0);
505 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
507 dir->i_size += nfidlen;
508 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
509 dinfo->i_lenAlloc += nfidlen;
510 mark_inode_dirty(dir);
514 if (fibh->sbh != fibh->ebh)
522 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
523 struct udf_fileident_bh *fibh,
524 struct fileIdentDesc *cfi)
526 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
528 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
529 memset(&(cfi->icb), 0x00, sizeof(long_ad));
531 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
534 static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
535 struct nameidata *nd)
537 struct udf_fileident_bh fibh;
539 struct fileIdentDesc cfi, *fi;
541 struct udf_inode_info *iinfo;
544 inode = udf_new_inode(dir, mode, &err);
550 iinfo = UDF_I(inode);
551 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
552 inode->i_data.a_ops = &udf_adinicb_aops;
554 inode->i_data.a_ops = &udf_aops;
555 inode->i_op = &udf_file_inode_operations;
556 inode->i_fop = &udf_file_operations;
557 inode->i_mode = mode;
558 mark_inode_dirty(inode);
560 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
563 mark_inode_dirty(inode);
568 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
569 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
570 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
571 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
572 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
573 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
574 mark_inode_dirty(dir);
575 if (fibh.sbh != fibh.ebh)
579 d_instantiate(dentry, inode);
584 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
588 struct udf_fileident_bh fibh;
589 struct fileIdentDesc cfi, *fi;
591 struct udf_inode_info *iinfo;
593 if (!old_valid_dev(rdev))
598 inode = udf_new_inode(dir, mode, &err);
602 iinfo = UDF_I(inode);
603 inode->i_uid = current->fsuid;
604 init_special_inode(inode, mode, rdev);
605 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
608 mark_inode_dirty(inode);
613 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
614 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
615 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
616 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
617 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
618 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
619 mark_inode_dirty(dir);
620 mark_inode_dirty(inode);
622 if (fibh.sbh != fibh.ebh)
625 d_instantiate(dentry, inode);
633 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
636 struct udf_fileident_bh fibh;
637 struct fileIdentDesc cfi, *fi;
639 struct udf_inode_info *dinfo = UDF_I(dir);
640 struct udf_inode_info *iinfo;
644 if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
648 inode = udf_new_inode(dir, S_IFDIR, &err);
652 iinfo = UDF_I(inode);
653 inode->i_op = &udf_dir_inode_operations;
654 inode->i_fop = &udf_dir_operations;
655 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
658 mark_inode_dirty(inode);
663 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
664 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
665 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
666 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
667 cfi.fileCharacteristics =
668 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
669 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
671 inode->i_mode = S_IFDIR | mode;
672 if (dir->i_mode & S_ISGID)
673 inode->i_mode |= S_ISGID;
674 mark_inode_dirty(inode);
676 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
679 mark_inode_dirty(inode);
683 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
684 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
685 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
686 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
687 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
688 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
690 mark_inode_dirty(dir);
691 d_instantiate(dentry, inode);
692 if (fibh.sbh != fibh.ebh)
702 static int empty_dir(struct inode *dir)
704 struct fileIdentDesc *fi, cfi;
705 struct udf_fileident_bh fibh;
707 loff_t size = udf_ext0_offset(dir) + dir->i_size;
712 struct extent_position epos = {};
713 struct udf_inode_info *dinfo = UDF_I(dir);
715 f_pos = udf_ext0_offset(dir);
716 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
718 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
719 fibh.sbh = fibh.ebh = NULL;
720 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
721 &epos, &eloc, &elen, &offset) ==
722 (EXT_RECORDED_ALLOCATED >> 30)) {
723 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
724 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
725 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
726 epos.offset -= sizeof(short_ad);
727 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
728 epos.offset -= sizeof(long_ad);
732 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
742 while (f_pos < size) {
743 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
746 if (fibh.sbh != fibh.ebh)
753 if (cfi.lengthFileIdent &&
754 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
755 if (fibh.sbh != fibh.ebh)
763 if (fibh.sbh != fibh.ebh)
771 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
774 struct inode *inode = dentry->d_inode;
775 struct udf_fileident_bh fibh;
776 struct fileIdentDesc *fi, cfi;
781 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
786 tloc = lelb_to_cpu(cfi.icb.extLocation);
787 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
790 if (!empty_dir(inode))
792 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
795 if (inode->i_nlink != 2)
796 udf_warning(inode->i_sb, "udf_rmdir",
797 "empty directory has nlink != 2 (%d)",
801 inode_dec_link_count(dir);
802 inode->i_ctime = dir->i_ctime = dir->i_mtime =
803 current_fs_time(dir->i_sb);
804 mark_inode_dirty(dir);
807 if (fibh.sbh != fibh.ebh)
816 static int udf_unlink(struct inode *dir, struct dentry *dentry)
819 struct inode *inode = dentry->d_inode;
820 struct udf_fileident_bh fibh;
821 struct fileIdentDesc *fi;
822 struct fileIdentDesc cfi;
827 fi = udf_find_entry(dir, dentry, &fibh, &cfi);
832 tloc = lelb_to_cpu(cfi.icb.extLocation);
833 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
836 if (!inode->i_nlink) {
837 udf_debug("Deleting nonexistent file (%lu), %d\n",
838 inode->i_ino, inode->i_nlink);
841 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
844 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
845 mark_inode_dirty(dir);
846 inode_dec_link_count(inode);
847 inode->i_ctime = dir->i_ctime;
851 if (fibh.sbh != fibh.ebh)
860 static int udf_symlink(struct inode *dir, struct dentry *dentry,
864 struct pathComponent *pc;
866 struct udf_fileident_bh fibh;
867 struct extent_position epos = {};
868 int eoffset, elen = 0;
869 struct fileIdentDesc *fi;
870 struct fileIdentDesc cfi;
874 char name[UDF_NAME_LEN];
876 struct buffer_head *bh;
877 struct udf_inode_info *iinfo;
880 inode = udf_new_inode(dir, S_IFLNK, &err);
884 iinfo = UDF_I(inode);
885 inode->i_mode = S_IFLNK | S_IRWXUGO;
886 inode->i_data.a_ops = &udf_symlink_aops;
887 inode->i_op = &page_symlink_inode_operations;
889 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
893 block = udf_new_block(inode->i_sb, inode,
894 iinfo->i_location.partitionReferenceNum,
895 iinfo->i_location.logicalBlockNum, &err);
898 epos.block = iinfo->i_location;
899 epos.offset = udf_file_entry_alloc_offset(inode);
901 eloc.logicalBlockNum = block;
902 eloc.partitionReferenceNum =
903 iinfo->i_location.partitionReferenceNum;
904 elen = inode->i_sb->s_blocksize;
905 iinfo->i_lenExtents = elen;
906 udf_add_aext(inode, &epos, eloc, elen, 0);
909 block = udf_get_pblock(inode->i_sb, block,
910 iinfo->i_location.partitionReferenceNum,
912 epos.bh = udf_tread(inode->i_sb, block);
913 lock_buffer(epos.bh);
914 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
915 set_buffer_uptodate(epos.bh);
916 unlock_buffer(epos.bh);
917 mark_buffer_dirty_inode(epos.bh, inode);
918 ea = epos.bh->b_data + udf_ext0_offset(inode);
920 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
922 eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
923 pc = (struct pathComponent *)ea;
925 if (*symname == '/') {
928 } while (*symname == '/');
930 pc->componentType = 1;
931 pc->lengthComponentIdent = 0;
932 pc->componentFileVersionNum = 0;
933 pc += sizeof(struct pathComponent);
934 elen += sizeof(struct pathComponent);
940 if (elen + sizeof(struct pathComponent) > eoffset)
943 pc = (struct pathComponent *)(ea + elen);
945 compstart = (char *)symname;
949 } while (*symname && *symname != '/');
951 pc->componentType = 5;
952 pc->lengthComponentIdent = 0;
953 pc->componentFileVersionNum = 0;
954 if (compstart[0] == '.') {
955 if ((symname - compstart) == 1)
956 pc->componentType = 4;
957 else if ((symname - compstart) == 2 &&
959 pc->componentType = 3;
962 if (pc->componentType == 5) {
963 namelen = udf_put_filename(inode->i_sb, compstart, name,
964 symname - compstart);
968 if (elen + sizeof(struct pathComponent) + namelen >
972 pc->lengthComponentIdent = namelen;
974 memcpy(pc->componentIdent, name, namelen);
977 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
982 } while (*symname == '/');
987 inode->i_size = elen;
988 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
989 iinfo->i_lenAlloc = inode->i_size;
990 mark_inode_dirty(inode);
992 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
995 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
996 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
997 bh = UDF_SB(inode->i_sb)->s_lvid_bh;
999 struct logicalVolIntegrityDesc *lvid =
1000 (struct logicalVolIntegrityDesc *)bh->b_data;
1001 struct logicalVolHeaderDesc *lvhd;
1003 lvhd = (struct logicalVolHeaderDesc *)
1004 lvid->logicalVolContentsUse;
1005 uniqueID = le64_to_cpu(lvhd->uniqueID);
1006 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1007 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1008 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1010 lvhd->uniqueID = cpu_to_le64(uniqueID);
1011 mark_buffer_dirty(bh);
1013 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1014 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1015 mark_inode_dirty(dir);
1016 if (fibh.sbh != fibh.ebh)
1019 d_instantiate(dentry, inode);
1027 inode_dec_link_count(inode);
1032 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1033 struct dentry *dentry)
1035 struct inode *inode = old_dentry->d_inode;
1036 struct udf_fileident_bh fibh;
1037 struct fileIdentDesc cfi, *fi;
1039 struct buffer_head *bh;
1042 if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
1047 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1052 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1053 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1054 bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1056 struct logicalVolIntegrityDesc *lvid =
1057 (struct logicalVolIntegrityDesc *)bh->b_data;
1058 struct logicalVolHeaderDesc *lvhd;
1060 lvhd = (struct logicalVolHeaderDesc *)
1061 (lvid->logicalVolContentsUse);
1062 uniqueID = le64_to_cpu(lvhd->uniqueID);
1063 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1064 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1065 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1067 lvhd->uniqueID = cpu_to_le64(uniqueID);
1068 mark_buffer_dirty(bh);
1070 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1071 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1072 mark_inode_dirty(dir);
1074 if (fibh.sbh != fibh.ebh)
1078 inode->i_ctime = current_fs_time(inode->i_sb);
1079 mark_inode_dirty(inode);
1080 atomic_inc(&inode->i_count);
1081 d_instantiate(dentry, inode);
1087 /* Anybody can rename anything with this: the permission checks are left to the
1088 * higher-level routines.
1090 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1091 struct inode *new_dir, struct dentry *new_dentry)
1093 struct inode *old_inode = old_dentry->d_inode;
1094 struct inode *new_inode = new_dentry->d_inode;
1095 struct udf_fileident_bh ofibh, nfibh;
1096 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1097 struct fileIdentDesc ocfi, ncfi;
1098 struct buffer_head *dir_bh = NULL;
1099 int retval = -ENOENT;
1100 kernel_lb_addr tloc;
1101 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1104 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1106 if (ofibh.sbh != ofibh.ebh)
1110 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1111 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1112 != old_inode->i_ino)
1115 nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1118 if (nfibh.sbh != nfibh.ebh)
1124 if (S_ISDIR(old_inode->i_mode)) {
1125 int offset = udf_ext0_offset(old_inode);
1128 retval = -ENOTEMPTY;
1129 if (!empty_dir(new_inode))
1133 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1134 dir_fi = udf_get_fileident(
1135 old_iinfo->i_ext.i_data -
1137 sizeof(struct extendedFileEntry) :
1138 sizeof(struct fileEntry)),
1139 old_inode->i_sb->s_blocksize, &offset);
1141 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1144 dir_fi = udf_get_fileident(dir_bh->b_data,
1145 old_inode->i_sb->s_blocksize, &offset);
1149 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1150 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) !=
1157 (256 << sizeof(new_dir->i_nlink)) - 1)
1161 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1168 * Like most other Unix systems, set the ctime for inodes on a
1171 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1172 mark_inode_dirty(old_inode);
1177 ncfi.fileVersionNum = ocfi.fileVersionNum;
1178 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1179 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1180 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1182 /* The old fid may have moved - find it again */
1183 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1184 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1187 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1188 inode_dec_link_count(new_inode);
1190 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1191 mark_inode_dirty(old_dir);
1194 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1195 udf_update_tag((char *)dir_fi,
1196 (sizeof(struct fileIdentDesc) +
1197 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1198 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1199 mark_inode_dirty(old_inode);
1201 mark_buffer_dirty_inode(dir_bh, old_inode);
1203 inode_dec_link_count(old_dir);
1205 inode_dec_link_count(new_inode);
1208 mark_inode_dirty(new_dir);
1213 if (ofibh.sbh != ofibh.ebh)
1223 if (nfibh.sbh != nfibh.ebh)
1232 const struct inode_operations udf_dir_inode_operations = {
1233 .lookup = udf_lookup,
1234 .create = udf_create,
1236 .unlink = udf_unlink,
1237 .symlink = udf_symlink,
1241 .rename = udf_rename,