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/sched.h>
31 #include <linux/crc-itu-t.h>
32 #include <linux/exportfs.h>
34 static inline int udf_match(int len1, const unsigned char *name1, int len2,
35 const unsigned char *name2)
40 return !memcmp(name1, name2, len1);
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)
47 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag);
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);
56 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
59 offset = fibh->soffset + sizeof(struct fileIdentDesc);
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);
67 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
68 memcpy(fibh->ebh->b_data, impuse - offset,
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);
81 memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
83 memcpy(fibh->ebh->b_data, fileident - offset,
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);
95 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
96 memset(fibh->ebh->b_data, 0x00, padlen + offset);
99 crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
100 sizeof(struct fileIdentDesc) - sizeof(struct tag));
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) +
110 crclen + sizeof(struct tag) -
111 sizeof(struct fileIdentDesc));
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);
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);
122 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
123 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
124 sizeof(struct fileIdentDesc));
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);
132 mark_inode_dirty(inode);
134 if (fibh->sbh != fibh->ebh)
135 mark_buffer_dirty_inode(fibh->ebh, inode);
136 mark_buffer_dirty_inode(fibh->sbh, inode);
142 * udf_find_entry - find entry in given directory.
144 * @dir: directory inode to search in
145 * @child: qstr of the name
146 * @fibh: buffer head / inode with file identifier descriptor we found
147 * @cfi: found file identifier descriptor with given name
149 * This function searches in the directory @dir for a file name @child. When
150 * found, @fibh points to the buffer head(s) (bh is NULL for in ICB
151 * directories) containing the file identifier descriptor (FID). In that case
152 * the function returns pointer to the FID in the buffer or inode - but note
153 * that FID may be split among two buffers (blocks) so accessing it via that
154 * pointer isn't easily possible. This pointer can be used only as an iterator
155 * for other directory manipulation functions. For inspection of the FID @cfi
156 * can be used - the found FID is copied there.
158 * Returns pointer to FID, NULL when nothing found, or error code.
160 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
161 const struct qstr *child,
162 struct udf_fileident_bh *fibh,
163 struct fileIdentDesc *cfi)
165 struct fileIdentDesc *fi = NULL;
168 unsigned char *fname = NULL, *copy_name = NULL;
169 unsigned char *nameptr;
173 struct kernel_lb_addr eloc;
176 struct extent_position epos = {};
177 struct udf_inode_info *dinfo = UDF_I(dir);
178 int isdotdot = child->len == 2 &&
179 child->name[0] == '.' && child->name[1] == '.';
180 struct super_block *sb = dir->i_sb;
182 size = udf_ext0_offset(dir) + dir->i_size;
183 f_pos = udf_ext0_offset(dir);
185 fibh->sbh = fibh->ebh = NULL;
186 fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1);
187 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
188 if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos,
189 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
194 block = udf_get_lb_pblock(sb, &eloc, offset);
195 if ((++offset << sb->s_blocksize_bits) < elen) {
196 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
197 epos.offset -= sizeof(struct short_ad);
198 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
199 epos.offset -= sizeof(struct long_ad);
203 fibh->sbh = fibh->ebh = udf_tread(sb, block);
210 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
212 fi = ERR_PTR(-ENOMEM);
216 while (f_pos < size) {
217 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
224 liu = le16_to_cpu(cfi->lengthOfImpUse);
225 lfi = cfi->lengthFileIdent;
227 if (fibh->sbh == fibh->ebh) {
228 nameptr = fi->fileIdent + liu;
230 int poffset; /* Unpaded ending offset */
232 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
236 nameptr = (uint8_t *)(fibh->ebh->b_data +
240 copy_name = kmalloc(UDF_NAME_LEN,
243 fi = ERR_PTR(-ENOMEM);
248 memcpy(nameptr, fi->fileIdent + liu,
250 memcpy(nameptr + lfi - poffset,
251 fibh->ebh->b_data, poffset);
255 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
256 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
260 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
261 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
265 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
272 flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
278 if (udf_match(flen, fname, child->len, child->name))
284 if (fibh->sbh != fibh->ebh)
295 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
298 struct inode *inode = NULL;
299 struct fileIdentDesc cfi;
300 struct udf_fileident_bh fibh;
301 struct fileIdentDesc *fi;
303 if (dentry->d_name.len > UDF_NAME_LEN)
304 return ERR_PTR(-ENAMETOOLONG);
307 /* temporary shorthand for specifying files by inode number */
308 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
309 struct kernel_lb_addr lb = {
310 .logicalBlockNum = 0,
311 .partitionReferenceNum =
312 simple_strtoul(dentry->d_name.name + 3,
315 inode = udf_iget(dir->i_sb, lb);
319 #endif /* UDF_RECOVERY */
321 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
326 struct kernel_lb_addr loc;
328 if (fibh.sbh != fibh.ebh)
332 loc = lelb_to_cpu(cfi.icb.extLocation);
333 inode = udf_iget(dir->i_sb, &loc);
335 return ERR_CAST(inode);
338 return d_splice_alias(inode, dentry);
341 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
342 struct dentry *dentry,
343 struct udf_fileident_bh *fibh,
344 struct fileIdentDesc *cfi, int *err)
346 struct super_block *sb = dir->i_sb;
347 struct fileIdentDesc *fi = NULL;
348 unsigned char *name = NULL;
351 loff_t size = udf_ext0_offset(dir) + dir->i_size;
356 struct kernel_lb_addr eloc;
359 struct extent_position epos = {};
360 struct udf_inode_info *dinfo;
362 fibh->sbh = fibh->ebh = NULL;
363 name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
370 if (!dentry->d_name.len) {
374 namelen = udf_put_filename(sb, dentry->d_name.name,
376 name, UDF_NAME_LEN_CS0);
378 *err = -ENAMETOOLONG;
385 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
387 f_pos = udf_ext0_offset(dir);
389 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
391 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
392 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
393 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
394 block = udf_get_lb_pblock(dir->i_sb,
395 &dinfo->i_location, 0);
396 fibh->soffset = fibh->eoffset = sb->s_blocksize;
399 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
400 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
401 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
402 epos.offset -= sizeof(struct short_ad);
403 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
404 epos.offset -= sizeof(struct long_ad);
408 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
414 block = dinfo->i_location.logicalBlockNum;
417 while (f_pos < size) {
418 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
426 liu = le16_to_cpu(cfi->lengthOfImpUse);
427 lfi = cfi->lengthFileIdent;
429 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
430 if (((sizeof(struct fileIdentDesc) +
431 liu + lfi + 3) & ~3) == nfidlen) {
432 cfi->descTag.tagSerialNum = cpu_to_le16(1);
433 cfi->fileVersionNum = cpu_to_le16(1);
434 cfi->fileCharacteristics = 0;
435 cfi->lengthFileIdent = namelen;
436 cfi->lengthOfImpUse = cpu_to_le16(0);
437 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
451 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
452 sb->s_blocksize - fibh->eoffset < nfidlen) {
455 fibh->soffset -= udf_ext0_offset(dir);
456 fibh->eoffset -= udf_ext0_offset(dir);
457 f_pos -= udf_ext0_offset(dir);
458 if (fibh->sbh != fibh->ebh)
461 fibh->sbh = fibh->ebh =
462 udf_expand_dir_adinicb(dir, &block, err);
465 epos.block = dinfo->i_location;
466 epos.offset = udf_file_entry_alloc_offset(dir);
467 /* Load extent udf_expand_dir_adinicb() has created */
468 udf_current_aext(dir, &epos, &eloc, &elen, 1);
471 /* Entry fits into current block? */
472 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
473 fibh->soffset = fibh->eoffset;
474 fibh->eoffset += nfidlen;
475 if (fibh->sbh != fibh->ebh) {
477 fibh->sbh = fibh->ebh;
480 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
481 block = dinfo->i_location.logicalBlockNum;
482 fi = (struct fileIdentDesc *)
483 (dinfo->i_ext.i_data +
485 udf_ext0_offset(dir) +
488 block = eloc.logicalBlockNum +
490 dir->i_sb->s_blocksize_bits);
491 fi = (struct fileIdentDesc *)
492 (fibh->sbh->b_data + fibh->soffset);
495 /* Round up last extent in the file */
496 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
497 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
498 epos.offset -= sizeof(struct short_ad);
499 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
500 epos.offset -= sizeof(struct long_ad);
501 udf_write_aext(dir, &epos, &eloc, elen, 1);
502 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
503 - 1) & ~(sb->s_blocksize - 1);
505 fibh->soffset = fibh->eoffset - sb->s_blocksize;
506 fibh->eoffset += nfidlen - sb->s_blocksize;
507 if (fibh->sbh != fibh->ebh) {
509 fibh->sbh = fibh->ebh;
512 block = eloc.logicalBlockNum + ((elen - 1) >>
513 dir->i_sb->s_blocksize_bits);
514 fibh->ebh = udf_bread(dir,
515 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
518 /* Extents could have been merged, invalidate our position */
521 epos.block = dinfo->i_location;
522 epos.offset = udf_file_entry_alloc_offset(dir);
524 if (!fibh->soffset) {
525 /* Find the freshly allocated block */
526 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
527 (EXT_RECORDED_ALLOCATED >> 30))
529 block = eloc.logicalBlockNum + ((elen - 1) >>
530 dir->i_sb->s_blocksize_bits);
532 fibh->sbh = fibh->ebh;
533 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
535 fi = (struct fileIdentDesc *)
536 (fibh->sbh->b_data + sb->s_blocksize +
541 memset(cfi, 0, sizeof(struct fileIdentDesc));
542 if (UDF_SB(sb)->s_udfrev >= 0x0200)
543 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
546 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
548 cfi->fileVersionNum = cpu_to_le16(1);
549 cfi->lengthFileIdent = namelen;
550 cfi->lengthOfImpUse = cpu_to_le16(0);
551 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
552 dir->i_size += nfidlen;
553 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
554 dinfo->i_lenAlloc += nfidlen;
556 /* Find the last extent and truncate it to proper size */
557 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
558 (EXT_RECORDED_ALLOCATED >> 30))
560 elen -= dinfo->i_lenExtents - dir->i_size;
561 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
562 epos.offset -= sizeof(struct short_ad);
563 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
564 epos.offset -= sizeof(struct long_ad);
565 udf_write_aext(dir, &epos, &eloc, elen, 1);
566 dinfo->i_lenExtents = dir->i_size;
569 mark_inode_dirty(dir);
578 if (fibh->sbh != fibh->ebh)
587 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
588 struct udf_fileident_bh *fibh,
589 struct fileIdentDesc *cfi)
591 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
593 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
594 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
596 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
599 static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
601 struct udf_inode_info *iinfo = UDF_I(inode);
602 struct inode *dir = d_inode(dentry->d_parent);
603 struct udf_fileident_bh fibh;
604 struct fileIdentDesc cfi, *fi;
607 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
609 inode_dec_link_count(inode);
610 unlock_new_inode(inode);
614 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
615 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
616 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
617 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
618 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
619 dir->i_ctime = dir->i_mtime = current_time(dir);
620 mark_inode_dirty(dir);
621 if (fibh.sbh != fibh.ebh)
624 d_instantiate_new(dentry, inode);
629 static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
632 struct inode *inode = udf_new_inode(dir, mode);
635 return PTR_ERR(inode);
637 if (UDF_I(inode)->i_alloc_type == 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 mark_inode_dirty(inode);
645 return udf_add_nondir(dentry, inode);
648 static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
650 struct inode *inode = udf_new_inode(dir, mode);
653 return PTR_ERR(inode);
655 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
656 inode->i_data.a_ops = &udf_adinicb_aops;
658 inode->i_data.a_ops = &udf_aops;
659 inode->i_op = &udf_file_inode_operations;
660 inode->i_fop = &udf_file_operations;
661 mark_inode_dirty(inode);
662 d_tmpfile(dentry, inode);
663 unlock_new_inode(inode);
667 static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
672 if (!old_valid_dev(rdev))
675 inode = udf_new_inode(dir, mode);
677 return PTR_ERR(inode);
679 init_special_inode(inode, mode, rdev);
680 return udf_add_nondir(dentry, inode);
683 static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
686 struct udf_fileident_bh fibh;
687 struct fileIdentDesc cfi, *fi;
689 struct udf_inode_info *dinfo = UDF_I(dir);
690 struct udf_inode_info *iinfo;
692 inode = udf_new_inode(dir, S_IFDIR | mode);
694 return PTR_ERR(inode);
696 iinfo = UDF_I(inode);
697 inode->i_op = &udf_dir_inode_operations;
698 inode->i_fop = &udf_dir_operations;
699 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
701 inode_dec_link_count(inode);
702 unlock_new_inode(inode);
707 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
708 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
709 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
710 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
711 cfi.fileCharacteristics =
712 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
713 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
715 mark_inode_dirty(inode);
717 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
720 mark_inode_dirty(inode);
721 unlock_new_inode(inode);
725 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
726 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
727 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
728 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
729 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
730 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
732 dir->i_ctime = dir->i_mtime = current_time(dir);
733 mark_inode_dirty(dir);
734 d_instantiate_new(dentry, inode);
735 if (fibh.sbh != fibh.ebh)
744 static int empty_dir(struct inode *dir)
746 struct fileIdentDesc *fi, cfi;
747 struct udf_fileident_bh fibh;
749 loff_t size = udf_ext0_offset(dir) + dir->i_size;
751 struct kernel_lb_addr eloc;
754 struct extent_position epos = {};
755 struct udf_inode_info *dinfo = UDF_I(dir);
757 f_pos = udf_ext0_offset(dir);
758 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
760 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
761 fibh.sbh = fibh.ebh = NULL;
762 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
763 &epos, &eloc, &elen, &offset) ==
764 (EXT_RECORDED_ALLOCATED >> 30)) {
765 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
766 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
767 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
768 epos.offset -= sizeof(struct short_ad);
769 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
770 epos.offset -= sizeof(struct long_ad);
774 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
784 while (f_pos < size) {
785 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
788 if (fibh.sbh != fibh.ebh)
795 if (cfi.lengthFileIdent &&
796 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
797 if (fibh.sbh != fibh.ebh)
805 if (fibh.sbh != fibh.ebh)
813 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
816 struct inode *inode = d_inode(dentry);
817 struct udf_fileident_bh fibh;
818 struct fileIdentDesc *fi, cfi;
819 struct kernel_lb_addr tloc;
822 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
823 if (IS_ERR_OR_NULL(fi)) {
825 retval = PTR_ERR(fi);
830 tloc = lelb_to_cpu(cfi.icb.extLocation);
831 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
834 if (!empty_dir(inode))
836 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
839 if (inode->i_nlink != 2)
840 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
844 inode_dec_link_count(dir);
845 inode->i_ctime = dir->i_ctime = dir->i_mtime =
847 mark_inode_dirty(dir);
850 if (fibh.sbh != fibh.ebh)
858 static int udf_unlink(struct inode *dir, struct dentry *dentry)
861 struct inode *inode = d_inode(dentry);
862 struct udf_fileident_bh fibh;
863 struct fileIdentDesc *fi;
864 struct fileIdentDesc cfi;
865 struct kernel_lb_addr tloc;
868 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
870 if (IS_ERR_OR_NULL(fi)) {
872 retval = PTR_ERR(fi);
877 tloc = lelb_to_cpu(cfi.icb.extLocation);
878 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
881 if (!inode->i_nlink) {
882 udf_debug("Deleting nonexistent file (%lu), %d\n",
883 inode->i_ino, inode->i_nlink);
886 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
889 dir->i_ctime = dir->i_mtime = current_time(dir);
890 mark_inode_dirty(dir);
891 inode_dec_link_count(inode);
892 inode->i_ctime = dir->i_ctime;
896 if (fibh.sbh != fibh.ebh)
904 static int udf_symlink(struct inode *dir, struct dentry *dentry,
907 struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO);
908 struct pathComponent *pc;
909 const char *compstart;
910 struct extent_position epos = {};
911 int eoffset, elen = 0;
915 unsigned char *name = NULL;
917 struct udf_inode_info *iinfo;
918 struct super_block *sb = dir->i_sb;
921 return PTR_ERR(inode);
923 iinfo = UDF_I(inode);
924 down_write(&iinfo->i_data_sem);
925 name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
931 inode->i_data.a_ops = &udf_symlink_aops;
932 inode->i_op = &page_symlink_inode_operations;
933 inode_nohighmem(inode);
935 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
936 struct kernel_lb_addr eloc;
939 block = udf_new_block(sb, inode,
940 iinfo->i_location.partitionReferenceNum,
941 iinfo->i_location.logicalBlockNum, &err);
944 epos.block = iinfo->i_location;
945 epos.offset = udf_file_entry_alloc_offset(inode);
947 eloc.logicalBlockNum = block;
948 eloc.partitionReferenceNum =
949 iinfo->i_location.partitionReferenceNum;
950 bsize = sb->s_blocksize;
951 iinfo->i_lenExtents = bsize;
952 udf_add_aext(inode, &epos, &eloc, bsize, 0);
955 block = udf_get_pblock(sb, block,
956 iinfo->i_location.partitionReferenceNum,
958 epos.bh = udf_tgetblk(sb, block);
959 if (unlikely(!epos.bh)) {
963 lock_buffer(epos.bh);
964 memset(epos.bh->b_data, 0x00, bsize);
965 set_buffer_uptodate(epos.bh);
966 unlock_buffer(epos.bh);
967 mark_buffer_dirty_inode(epos.bh, inode);
968 ea = epos.bh->b_data + udf_ext0_offset(inode);
970 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
972 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
973 pc = (struct pathComponent *)ea;
975 if (*symname == '/') {
978 } while (*symname == '/');
980 pc->componentType = 1;
981 pc->lengthComponentIdent = 0;
982 pc->componentFileVersionNum = 0;
983 elen += sizeof(struct pathComponent);
989 if (elen + sizeof(struct pathComponent) > eoffset)
992 pc = (struct pathComponent *)(ea + elen);
998 } while (*symname && *symname != '/');
1000 pc->componentType = 5;
1001 pc->lengthComponentIdent = 0;
1002 pc->componentFileVersionNum = 0;
1003 if (compstart[0] == '.') {
1004 if ((symname - compstart) == 1)
1005 pc->componentType = 4;
1006 else if ((symname - compstart) == 2 &&
1007 compstart[1] == '.')
1008 pc->componentType = 3;
1011 if (pc->componentType == 5) {
1012 namelen = udf_put_filename(sb, compstart,
1013 symname - compstart,
1014 name, UDF_NAME_LEN_CS0);
1018 if (elen + sizeof(struct pathComponent) + namelen >
1022 pc->lengthComponentIdent = namelen;
1024 memcpy(pc->componentIdent, name, namelen);
1027 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1032 } while (*symname == '/');
1037 inode->i_size = elen;
1038 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1039 iinfo->i_lenAlloc = inode->i_size;
1041 udf_truncate_tail_extent(inode);
1042 mark_inode_dirty(inode);
1043 up_write(&iinfo->i_data_sem);
1045 err = udf_add_nondir(dentry, inode);
1051 up_write(&iinfo->i_data_sem);
1052 inode_dec_link_count(inode);
1053 unlock_new_inode(inode);
1058 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1059 struct dentry *dentry)
1061 struct inode *inode = d_inode(old_dentry);
1062 struct udf_fileident_bh fibh;
1063 struct fileIdentDesc cfi, *fi;
1066 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1070 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1071 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1072 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
1073 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1074 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
1076 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1077 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1078 mark_inode_dirty(dir);
1080 if (fibh.sbh != fibh.ebh)
1084 inode->i_ctime = current_time(inode);
1085 mark_inode_dirty(inode);
1086 dir->i_ctime = dir->i_mtime = current_time(dir);
1087 mark_inode_dirty(dir);
1089 d_instantiate(dentry, inode);
1094 /* Anybody can rename anything with this: the permission checks are left to the
1095 * higher-level routines.
1097 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1098 struct inode *new_dir, struct dentry *new_dentry,
1101 struct inode *old_inode = d_inode(old_dentry);
1102 struct inode *new_inode = d_inode(new_dentry);
1103 struct udf_fileident_bh ofibh, nfibh;
1104 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1105 struct fileIdentDesc ocfi, ncfi;
1106 struct buffer_head *dir_bh = NULL;
1107 int retval = -ENOENT;
1108 struct kernel_lb_addr tloc;
1109 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1111 if (flags & ~RENAME_NOREPLACE)
1114 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1116 retval = PTR_ERR(ofi);
1120 if (ofibh.sbh != ofibh.ebh)
1124 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1125 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
1126 != old_inode->i_ino)
1129 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
1131 retval = PTR_ERR(nfi);
1134 if (nfi && !new_inode) {
1135 if (nfibh.sbh != nfibh.ebh)
1140 if (S_ISDIR(old_inode->i_mode)) {
1141 int offset = udf_ext0_offset(old_inode);
1144 retval = -ENOTEMPTY;
1145 if (!empty_dir(new_inode))
1149 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1150 dir_fi = udf_get_fileident(
1151 old_iinfo->i_ext.i_data -
1153 sizeof(struct extendedFileEntry) :
1154 sizeof(struct fileEntry)),
1155 old_inode->i_sb->s_blocksize, &offset);
1157 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1160 dir_fi = udf_get_fileident(dir_bh->b_data,
1161 old_inode->i_sb->s_blocksize, &offset);
1165 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1166 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
1171 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1178 * Like most other Unix systems, set the ctime for inodes on a
1181 old_inode->i_ctime = current_time(old_inode);
1182 mark_inode_dirty(old_inode);
1187 ncfi.fileVersionNum = ocfi.fileVersionNum;
1188 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1189 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
1190 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1192 /* The old fid may have moved - find it again */
1193 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1194 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1197 new_inode->i_ctime = current_time(new_inode);
1198 inode_dec_link_count(new_inode);
1200 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1201 new_dir->i_ctime = new_dir->i_mtime = current_time(new_dir);
1202 mark_inode_dirty(old_dir);
1203 mark_inode_dirty(new_dir);
1206 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1207 udf_update_tag((char *)dir_fi,
1208 (sizeof(struct fileIdentDesc) +
1209 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1210 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1211 mark_inode_dirty(old_inode);
1213 mark_buffer_dirty_inode(dir_bh, old_inode);
1215 inode_dec_link_count(old_dir);
1217 inode_dec_link_count(new_inode);
1220 mark_inode_dirty(new_dir);
1225 if (ofibh.sbh != ofibh.ebh)
1235 if (nfibh.sbh != nfibh.ebh)
1243 static struct dentry *udf_get_parent(struct dentry *child)
1245 struct kernel_lb_addr tloc;
1246 struct inode *inode = NULL;
1247 struct qstr dotdot = QSTR_INIT("..", 2);
1248 struct fileIdentDesc cfi;
1249 struct udf_fileident_bh fibh;
1251 if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi))
1252 return ERR_PTR(-EACCES);
1254 if (fibh.sbh != fibh.ebh)
1258 tloc = lelb_to_cpu(cfi.icb.extLocation);
1259 inode = udf_iget(child->d_sb, &tloc);
1261 return ERR_CAST(inode);
1263 return d_obtain_alias(inode);
1267 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1268 u16 partref, __u32 generation)
1270 struct inode *inode;
1271 struct kernel_lb_addr loc;
1274 return ERR_PTR(-ESTALE);
1276 loc.logicalBlockNum = block;
1277 loc.partitionReferenceNum = partref;
1278 inode = udf_iget(sb, &loc);
1281 return ERR_CAST(inode);
1283 if (generation && inode->i_generation != generation) {
1285 return ERR_PTR(-ESTALE);
1287 return d_obtain_alias(inode);
1290 static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1291 struct fid *fid, int fh_len, int fh_type)
1294 (fh_type != FILEID_UDF_WITH_PARENT &&
1295 fh_type != FILEID_UDF_WITHOUT_PARENT))
1298 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1299 fid->udf.generation);
1302 static struct dentry *udf_fh_to_parent(struct super_block *sb,
1303 struct fid *fid, int fh_len, int fh_type)
1305 if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
1308 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1309 fid->udf.parent_partref,
1310 fid->udf.parent_generation);
1312 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1313 struct inode *parent)
1316 struct kernel_lb_addr location = UDF_I(inode)->i_location;
1317 struct fid *fid = (struct fid *)fh;
1318 int type = FILEID_UDF_WITHOUT_PARENT;
1320 if (parent && (len < 5)) {
1322 return FILEID_INVALID;
1323 } else if (len < 3) {
1325 return FILEID_INVALID;
1329 fid->udf.block = location.logicalBlockNum;
1330 fid->udf.partref = location.partitionReferenceNum;
1331 fid->udf.parent_partref = 0;
1332 fid->udf.generation = inode->i_generation;
1335 location = UDF_I(parent)->i_location;
1336 fid->udf.parent_block = location.logicalBlockNum;
1337 fid->udf.parent_partref = location.partitionReferenceNum;
1338 fid->udf.parent_generation = inode->i_generation;
1340 type = FILEID_UDF_WITH_PARENT;
1346 const struct export_operations udf_export_ops = {
1347 .encode_fh = udf_encode_fh,
1348 .fh_to_dentry = udf_fh_to_dentry,
1349 .fh_to_parent = udf_fh_to_parent,
1350 .get_parent = udf_get_parent,
1353 const struct inode_operations udf_dir_inode_operations = {
1354 .lookup = udf_lookup,
1355 .create = udf_create,
1357 .unlink = udf_unlink,
1358 .symlink = udf_symlink,
1362 .rename = udf_rename,
1363 .tmpfile = udf_tmpfile,