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(udf_get_fi_ident(sfi), fileident, lfi);
78 } else if (offset >= 0) {
79 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
81 memcpy(udf_get_fi_ident(sfi), fileident, -offset);
82 memcpy(fibh->ebh->b_data, fileident - offset,
89 if (adinicb || (offset + padlen < 0)) {
90 memset(udf_get_fi_ident(sfi) + lfi, 0x00, padlen);
91 } else if (offset >= 0) {
92 memset(fibh->ebh->b_data + offset, 0x00, padlen);
94 memset(udf_get_fi_ident(sfi) + lfi, 0x00, -offset);
95 memset(fibh->ebh->b_data, 0x00, padlen + offset);
98 crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
99 sizeof(struct fileIdentDesc) - sizeof(struct tag));
101 if (fibh->sbh == fibh->ebh) {
102 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
103 crclen + sizeof(struct tag) -
104 sizeof(struct fileIdentDesc));
105 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
106 crc = crc_itu_t(crc, fibh->ebh->b_data +
107 sizeof(struct fileIdentDesc) +
109 crclen + sizeof(struct tag) -
110 sizeof(struct fileIdentDesc));
112 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
113 -fibh->soffset - sizeof(struct fileIdentDesc));
114 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
117 cfi->descTag.descCRC = cpu_to_le16(crc);
118 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
119 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
121 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
122 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
123 sizeof(struct fileIdentDesc));
125 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
126 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
127 sizeof(struct fileIdentDesc) + fibh->soffset);
131 mark_inode_dirty(inode);
133 if (fibh->sbh != fibh->ebh)
134 mark_buffer_dirty_inode(fibh->ebh, inode);
135 mark_buffer_dirty_inode(fibh->sbh, inode);
141 * udf_find_entry - find entry in given directory.
143 * @dir: directory inode to search in
144 * @child: qstr of the name
145 * @fibh: buffer head / inode with file identifier descriptor we found
146 * @cfi: found file identifier descriptor with given name
148 * This function searches in the directory @dir for a file name @child. When
149 * found, @fibh points to the buffer head(s) (bh is NULL for in ICB
150 * directories) containing the file identifier descriptor (FID). In that case
151 * the function returns pointer to the FID in the buffer or inode - but note
152 * that FID may be split among two buffers (blocks) so accessing it via that
153 * pointer isn't easily possible. This pointer can be used only as an iterator
154 * for other directory manipulation functions. For inspection of the FID @cfi
155 * can be used - the found FID is copied there.
157 * Returns pointer to FID, NULL when nothing found, or error code.
159 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
160 const struct qstr *child,
161 struct udf_fileident_bh *fibh,
162 struct fileIdentDesc *cfi)
164 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 = udf_get_fi_ident(fi);
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, udf_get_fi_ident(fi),
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);
306 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
311 struct kernel_lb_addr loc;
313 if (fibh.sbh != fibh.ebh)
317 loc = lelb_to_cpu(cfi.icb.extLocation);
318 inode = udf_iget(dir->i_sb, &loc);
320 return ERR_CAST(inode);
323 return d_splice_alias(inode, dentry);
326 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
327 struct dentry *dentry,
328 struct udf_fileident_bh *fibh,
329 struct fileIdentDesc *cfi, int *err)
331 struct super_block *sb = dir->i_sb;
332 struct fileIdentDesc *fi = NULL;
333 unsigned char *name = NULL;
336 loff_t size = udf_ext0_offset(dir) + dir->i_size;
339 struct kernel_lb_addr eloc;
342 struct extent_position epos = {};
343 struct udf_inode_info *dinfo;
345 fibh->sbh = fibh->ebh = NULL;
346 name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
353 if (!dentry->d_name.len) {
357 namelen = udf_put_filename(sb, dentry->d_name.name,
359 name, UDF_NAME_LEN_CS0);
361 *err = -ENAMETOOLONG;
368 nfidlen = ALIGN(sizeof(struct fileIdentDesc) + namelen, UDF_NAME_PAD);
370 f_pos = udf_ext0_offset(dir);
372 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
374 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
375 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
376 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
377 block = udf_get_lb_pblock(dir->i_sb,
378 &dinfo->i_location, 0);
379 fibh->soffset = fibh->eoffset = sb->s_blocksize;
382 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
383 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
384 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
385 epos.offset -= sizeof(struct short_ad);
386 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
387 epos.offset -= sizeof(struct long_ad);
391 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
397 block = dinfo->i_location.logicalBlockNum;
400 while (f_pos < size) {
401 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
409 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
410 if (udf_dir_entry_len(cfi) == nfidlen) {
411 cfi->descTag.tagSerialNum = cpu_to_le16(1);
412 cfi->fileVersionNum = cpu_to_le16(1);
413 cfi->fileCharacteristics = 0;
414 cfi->lengthFileIdent = namelen;
415 cfi->lengthOfImpUse = cpu_to_le16(0);
416 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
430 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
431 sb->s_blocksize - fibh->eoffset < nfidlen) {
434 fibh->soffset -= udf_ext0_offset(dir);
435 fibh->eoffset -= udf_ext0_offset(dir);
436 f_pos -= udf_ext0_offset(dir);
437 if (fibh->sbh != fibh->ebh)
440 fibh->sbh = fibh->ebh =
441 udf_expand_dir_adinicb(dir, &block, err);
444 epos.block = dinfo->i_location;
445 epos.offset = udf_file_entry_alloc_offset(dir);
446 /* Load extent udf_expand_dir_adinicb() has created */
447 udf_current_aext(dir, &epos, &eloc, &elen, 1);
450 /* Entry fits into current block? */
451 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
452 fibh->soffset = fibh->eoffset;
453 fibh->eoffset += nfidlen;
454 if (fibh->sbh != fibh->ebh) {
456 fibh->sbh = fibh->ebh;
459 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
460 block = dinfo->i_location.logicalBlockNum;
461 fi = (struct fileIdentDesc *)
462 (dinfo->i_data + fibh->soffset -
463 udf_ext0_offset(dir) +
466 block = eloc.logicalBlockNum +
468 dir->i_sb->s_blocksize_bits);
469 fi = (struct fileIdentDesc *)
470 (fibh->sbh->b_data + fibh->soffset);
473 /* Round up last extent in the file */
474 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
475 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
476 epos.offset -= sizeof(struct short_ad);
477 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
478 epos.offset -= sizeof(struct long_ad);
479 udf_write_aext(dir, &epos, &eloc, elen, 1);
480 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
481 - 1) & ~(sb->s_blocksize - 1);
483 fibh->soffset = fibh->eoffset - sb->s_blocksize;
484 fibh->eoffset += nfidlen - sb->s_blocksize;
485 if (fibh->sbh != fibh->ebh) {
487 fibh->sbh = fibh->ebh;
490 block = eloc.logicalBlockNum + ((elen - 1) >>
491 dir->i_sb->s_blocksize_bits);
492 fibh->ebh = udf_bread(dir,
493 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
496 /* Extents could have been merged, invalidate our position */
499 epos.block = dinfo->i_location;
500 epos.offset = udf_file_entry_alloc_offset(dir);
502 if (!fibh->soffset) {
503 /* Find the freshly allocated block */
504 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
505 (EXT_RECORDED_ALLOCATED >> 30))
507 block = eloc.logicalBlockNum + ((elen - 1) >>
508 dir->i_sb->s_blocksize_bits);
510 fibh->sbh = fibh->ebh;
511 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
513 fi = (struct fileIdentDesc *)
514 (fibh->sbh->b_data + sb->s_blocksize +
519 memset(cfi, 0, sizeof(struct fileIdentDesc));
520 if (UDF_SB(sb)->s_udfrev >= 0x0200)
521 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
524 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
526 cfi->fileVersionNum = cpu_to_le16(1);
527 cfi->lengthFileIdent = namelen;
528 cfi->lengthOfImpUse = cpu_to_le16(0);
529 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
530 dir->i_size += nfidlen;
531 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
532 dinfo->i_lenAlloc += nfidlen;
534 /* Find the last extent and truncate it to proper size */
535 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
536 (EXT_RECORDED_ALLOCATED >> 30))
538 elen -= dinfo->i_lenExtents - dir->i_size;
539 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
540 epos.offset -= sizeof(struct short_ad);
541 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
542 epos.offset -= sizeof(struct long_ad);
543 udf_write_aext(dir, &epos, &eloc, elen, 1);
544 dinfo->i_lenExtents = dir->i_size;
547 mark_inode_dirty(dir);
556 if (fibh->sbh != fibh->ebh)
565 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
566 struct udf_fileident_bh *fibh,
567 struct fileIdentDesc *cfi)
569 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
571 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
572 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
574 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
577 static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
579 struct udf_inode_info *iinfo = UDF_I(inode);
580 struct inode *dir = d_inode(dentry->d_parent);
581 struct udf_fileident_bh fibh;
582 struct fileIdentDesc cfi, *fi;
585 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
587 inode_dec_link_count(inode);
588 discard_new_inode(inode);
591 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
592 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
593 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
594 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
595 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
596 dir->i_ctime = dir->i_mtime = current_time(dir);
597 mark_inode_dirty(dir);
598 if (fibh.sbh != fibh.ebh)
601 d_instantiate_new(dentry, inode);
606 static int udf_create(struct user_namespace *mnt_userns, struct inode *dir,
607 struct dentry *dentry, umode_t mode, bool excl)
609 struct inode *inode = udf_new_inode(dir, mode);
612 return PTR_ERR(inode);
614 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
615 inode->i_data.a_ops = &udf_adinicb_aops;
617 inode->i_data.a_ops = &udf_aops;
618 inode->i_op = &udf_file_inode_operations;
619 inode->i_fop = &udf_file_operations;
620 mark_inode_dirty(inode);
622 return udf_add_nondir(dentry, inode);
625 static int udf_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
626 struct dentry *dentry, umode_t mode)
628 struct inode *inode = udf_new_inode(dir, mode);
631 return PTR_ERR(inode);
633 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
634 inode->i_data.a_ops = &udf_adinicb_aops;
636 inode->i_data.a_ops = &udf_aops;
637 inode->i_op = &udf_file_inode_operations;
638 inode->i_fop = &udf_file_operations;
639 mark_inode_dirty(inode);
640 d_tmpfile(dentry, inode);
641 unlock_new_inode(inode);
645 static int udf_mknod(struct user_namespace *mnt_userns, struct inode *dir,
646 struct dentry *dentry, umode_t mode, dev_t rdev)
650 if (!old_valid_dev(rdev))
653 inode = udf_new_inode(dir, mode);
655 return PTR_ERR(inode);
657 init_special_inode(inode, mode, rdev);
658 return udf_add_nondir(dentry, inode);
661 static int udf_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
662 struct dentry *dentry, umode_t mode)
665 struct udf_fileident_bh fibh;
666 struct fileIdentDesc cfi, *fi;
668 struct udf_inode_info *dinfo = UDF_I(dir);
669 struct udf_inode_info *iinfo;
671 inode = udf_new_inode(dir, S_IFDIR | mode);
673 return PTR_ERR(inode);
675 iinfo = UDF_I(inode);
676 inode->i_op = &udf_dir_inode_operations;
677 inode->i_fop = &udf_dir_operations;
678 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
680 inode_dec_link_count(inode);
681 discard_new_inode(inode);
685 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
686 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
687 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
688 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
689 cfi.fileCharacteristics =
690 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
691 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
693 mark_inode_dirty(inode);
695 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
698 mark_inode_dirty(inode);
699 discard_new_inode(inode);
702 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
703 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
704 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
705 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
706 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
707 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
709 dir->i_ctime = dir->i_mtime = current_time(dir);
710 mark_inode_dirty(dir);
711 d_instantiate_new(dentry, inode);
712 if (fibh.sbh != fibh.ebh)
721 static int empty_dir(struct inode *dir)
723 struct fileIdentDesc *fi, cfi;
724 struct udf_fileident_bh fibh;
726 loff_t size = udf_ext0_offset(dir) + dir->i_size;
728 struct kernel_lb_addr eloc;
731 struct extent_position epos = {};
732 struct udf_inode_info *dinfo = UDF_I(dir);
734 f_pos = udf_ext0_offset(dir);
735 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
737 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
738 fibh.sbh = fibh.ebh = NULL;
739 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
740 &epos, &eloc, &elen, &offset) ==
741 (EXT_RECORDED_ALLOCATED >> 30)) {
742 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
743 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
744 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
745 epos.offset -= sizeof(struct short_ad);
746 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
747 epos.offset -= sizeof(struct long_ad);
751 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
761 while (f_pos < size) {
762 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
765 if (fibh.sbh != fibh.ebh)
772 if (cfi.lengthFileIdent &&
773 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
774 if (fibh.sbh != fibh.ebh)
782 if (fibh.sbh != fibh.ebh)
790 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
793 struct inode *inode = d_inode(dentry);
794 struct udf_fileident_bh fibh;
795 struct fileIdentDesc *fi, cfi;
796 struct kernel_lb_addr tloc;
799 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
800 if (IS_ERR_OR_NULL(fi)) {
802 retval = PTR_ERR(fi);
807 tloc = lelb_to_cpu(cfi.icb.extLocation);
808 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
811 if (!empty_dir(inode))
813 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
816 if (inode->i_nlink != 2)
817 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%u)\n",
821 inode_dec_link_count(dir);
822 inode->i_ctime = dir->i_ctime = dir->i_mtime =
824 mark_inode_dirty(dir);
827 if (fibh.sbh != fibh.ebh)
835 static int udf_unlink(struct inode *dir, struct dentry *dentry)
838 struct inode *inode = d_inode(dentry);
839 struct udf_fileident_bh fibh;
840 struct fileIdentDesc *fi;
841 struct fileIdentDesc cfi;
842 struct kernel_lb_addr tloc;
845 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
847 if (IS_ERR_OR_NULL(fi)) {
849 retval = PTR_ERR(fi);
854 tloc = lelb_to_cpu(cfi.icb.extLocation);
855 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
858 if (!inode->i_nlink) {
859 udf_debug("Deleting nonexistent file (%lu), %u\n",
860 inode->i_ino, inode->i_nlink);
863 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
866 dir->i_ctime = dir->i_mtime = current_time(dir);
867 mark_inode_dirty(dir);
868 inode_dec_link_count(inode);
869 inode->i_ctime = dir->i_ctime;
873 if (fibh.sbh != fibh.ebh)
881 static int udf_symlink(struct user_namespace *mnt_userns, struct inode *dir,
882 struct dentry *dentry, const char *symname)
884 struct inode *inode = udf_new_inode(dir, S_IFLNK | 0777);
885 struct pathComponent *pc;
886 const char *compstart;
887 struct extent_position epos = {};
888 int eoffset, elen = 0;
892 unsigned char *name = NULL;
894 struct udf_inode_info *iinfo;
895 struct super_block *sb = dir->i_sb;
898 return PTR_ERR(inode);
900 iinfo = UDF_I(inode);
901 down_write(&iinfo->i_data_sem);
902 name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
908 inode->i_data.a_ops = &udf_symlink_aops;
909 inode->i_op = &udf_symlink_inode_operations;
910 inode_nohighmem(inode);
912 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
913 struct kernel_lb_addr eloc;
916 block = udf_new_block(sb, inode,
917 iinfo->i_location.partitionReferenceNum,
918 iinfo->i_location.logicalBlockNum, &err);
921 epos.block = iinfo->i_location;
922 epos.offset = udf_file_entry_alloc_offset(inode);
924 eloc.logicalBlockNum = block;
925 eloc.partitionReferenceNum =
926 iinfo->i_location.partitionReferenceNum;
927 bsize = sb->s_blocksize;
928 iinfo->i_lenExtents = bsize;
929 udf_add_aext(inode, &epos, &eloc, bsize, 0);
932 block = udf_get_pblock(sb, block,
933 iinfo->i_location.partitionReferenceNum,
935 epos.bh = udf_tgetblk(sb, block);
936 if (unlikely(!epos.bh)) {
940 lock_buffer(epos.bh);
941 memset(epos.bh->b_data, 0x00, bsize);
942 set_buffer_uptodate(epos.bh);
943 unlock_buffer(epos.bh);
944 mark_buffer_dirty_inode(epos.bh, inode);
945 ea = epos.bh->b_data + udf_ext0_offset(inode);
947 ea = iinfo->i_data + iinfo->i_lenEAttr;
949 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
950 pc = (struct pathComponent *)ea;
952 if (*symname == '/') {
955 } while (*symname == '/');
957 pc->componentType = 1;
958 pc->lengthComponentIdent = 0;
959 pc->componentFileVersionNum = 0;
960 elen += sizeof(struct pathComponent);
966 if (elen + sizeof(struct pathComponent) > eoffset)
969 pc = (struct pathComponent *)(ea + elen);
975 } while (*symname && *symname != '/');
977 pc->componentType = 5;
978 pc->lengthComponentIdent = 0;
979 pc->componentFileVersionNum = 0;
980 if (compstart[0] == '.') {
981 if ((symname - compstart) == 1)
982 pc->componentType = 4;
983 else if ((symname - compstart) == 2 &&
985 pc->componentType = 3;
988 if (pc->componentType == 5) {
989 namelen = udf_put_filename(sb, compstart,
991 name, UDF_NAME_LEN_CS0);
995 if (elen + sizeof(struct pathComponent) + namelen >
999 pc->lengthComponentIdent = namelen;
1001 memcpy(pc->componentIdent, name, namelen);
1004 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1009 } while (*symname == '/');
1014 inode->i_size = elen;
1015 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1016 iinfo->i_lenAlloc = inode->i_size;
1018 udf_truncate_tail_extent(inode);
1019 mark_inode_dirty(inode);
1020 up_write(&iinfo->i_data_sem);
1022 err = udf_add_nondir(dentry, inode);
1028 up_write(&iinfo->i_data_sem);
1029 inode_dec_link_count(inode);
1030 discard_new_inode(inode);
1034 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1035 struct dentry *dentry)
1037 struct inode *inode = d_inode(old_dentry);
1038 struct udf_fileident_bh fibh;
1039 struct fileIdentDesc cfi, *fi;
1042 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1046 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1047 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1048 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
1049 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1050 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
1052 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1053 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1054 mark_inode_dirty(dir);
1056 if (fibh.sbh != fibh.ebh)
1060 inode->i_ctime = current_time(inode);
1061 mark_inode_dirty(inode);
1062 dir->i_ctime = dir->i_mtime = current_time(dir);
1063 mark_inode_dirty(dir);
1065 d_instantiate(dentry, inode);
1070 /* Anybody can rename anything with this: the permission checks are left to the
1071 * higher-level routines.
1073 static int udf_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
1074 struct dentry *old_dentry, struct inode *new_dir,
1075 struct dentry *new_dentry, unsigned int flags)
1077 struct inode *old_inode = d_inode(old_dentry);
1078 struct inode *new_inode = d_inode(new_dentry);
1079 struct udf_fileident_bh ofibh, nfibh;
1080 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1081 struct fileIdentDesc ocfi, ncfi;
1082 struct buffer_head *dir_bh = NULL;
1083 int retval = -ENOENT;
1084 struct kernel_lb_addr tloc;
1085 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1087 if (flags & ~RENAME_NOREPLACE)
1090 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1092 retval = PTR_ERR(ofi);
1096 if (ofibh.sbh != ofibh.ebh)
1100 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1101 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
1102 != old_inode->i_ino)
1105 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
1107 retval = PTR_ERR(nfi);
1110 if (nfi && !new_inode) {
1111 if (nfibh.sbh != nfibh.ebh)
1116 if (S_ISDIR(old_inode->i_mode)) {
1117 int offset = udf_ext0_offset(old_inode);
1120 retval = -ENOTEMPTY;
1121 if (!empty_dir(new_inode))
1125 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1126 dir_fi = udf_get_fileident(
1129 sizeof(struct extendedFileEntry) :
1130 sizeof(struct fileEntry)),
1131 old_inode->i_sb->s_blocksize, &offset);
1133 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1136 dir_fi = udf_get_fileident(dir_bh->b_data,
1137 old_inode->i_sb->s_blocksize, &offset);
1141 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1142 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
1147 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1154 * Like most other Unix systems, set the ctime for inodes on a
1157 old_inode->i_ctime = current_time(old_inode);
1158 mark_inode_dirty(old_inode);
1163 ncfi.fileVersionNum = ocfi.fileVersionNum;
1164 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1165 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(ocfi.icb));
1166 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1168 /* The old fid may have moved - find it again */
1169 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1170 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1173 new_inode->i_ctime = current_time(new_inode);
1174 inode_dec_link_count(new_inode);
1176 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1177 new_dir->i_ctime = new_dir->i_mtime = current_time(new_dir);
1178 mark_inode_dirty(old_dir);
1179 mark_inode_dirty(new_dir);
1182 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1183 udf_update_tag((char *)dir_fi, udf_dir_entry_len(dir_fi));
1184 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1185 mark_inode_dirty(old_inode);
1187 mark_buffer_dirty_inode(dir_bh, old_inode);
1189 inode_dec_link_count(old_dir);
1191 inode_dec_link_count(new_inode);
1194 mark_inode_dirty(new_dir);
1199 if (ofibh.sbh != ofibh.ebh)
1209 if (nfibh.sbh != nfibh.ebh)
1217 static struct dentry *udf_get_parent(struct dentry *child)
1219 struct kernel_lb_addr tloc;
1220 struct inode *inode = NULL;
1221 struct fileIdentDesc cfi;
1222 struct udf_fileident_bh fibh;
1224 if (!udf_find_entry(d_inode(child), &dotdot_name, &fibh, &cfi))
1225 return ERR_PTR(-EACCES);
1227 if (fibh.sbh != fibh.ebh)
1231 tloc = lelb_to_cpu(cfi.icb.extLocation);
1232 inode = udf_iget(child->d_sb, &tloc);
1234 return ERR_CAST(inode);
1236 return d_obtain_alias(inode);
1240 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1241 u16 partref, __u32 generation)
1243 struct inode *inode;
1244 struct kernel_lb_addr loc;
1247 return ERR_PTR(-ESTALE);
1249 loc.logicalBlockNum = block;
1250 loc.partitionReferenceNum = partref;
1251 inode = udf_iget(sb, &loc);
1254 return ERR_CAST(inode);
1256 if (generation && inode->i_generation != generation) {
1258 return ERR_PTR(-ESTALE);
1260 return d_obtain_alias(inode);
1263 static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1264 struct fid *fid, int fh_len, int fh_type)
1267 (fh_type != FILEID_UDF_WITH_PARENT &&
1268 fh_type != FILEID_UDF_WITHOUT_PARENT))
1271 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1272 fid->udf.generation);
1275 static struct dentry *udf_fh_to_parent(struct super_block *sb,
1276 struct fid *fid, int fh_len, int fh_type)
1278 if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
1281 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1282 fid->udf.parent_partref,
1283 fid->udf.parent_generation);
1285 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1286 struct inode *parent)
1289 struct kernel_lb_addr location = UDF_I(inode)->i_location;
1290 struct fid *fid = (struct fid *)fh;
1291 int type = FILEID_UDF_WITHOUT_PARENT;
1293 if (parent && (len < 5)) {
1295 return FILEID_INVALID;
1296 } else if (len < 3) {
1298 return FILEID_INVALID;
1302 fid->udf.block = location.logicalBlockNum;
1303 fid->udf.partref = location.partitionReferenceNum;
1304 fid->udf.parent_partref = 0;
1305 fid->udf.generation = inode->i_generation;
1308 location = UDF_I(parent)->i_location;
1309 fid->udf.parent_block = location.logicalBlockNum;
1310 fid->udf.parent_partref = location.partitionReferenceNum;
1311 fid->udf.parent_generation = inode->i_generation;
1313 type = FILEID_UDF_WITH_PARENT;
1319 const struct export_operations udf_export_ops = {
1320 .encode_fh = udf_encode_fh,
1321 .fh_to_dentry = udf_fh_to_dentry,
1322 .fh_to_parent = udf_fh_to_parent,
1323 .get_parent = udf_get_parent,
1326 const struct inode_operations udf_dir_inode_operations = {
1327 .lookup = udf_lookup,
1328 .create = udf_create,
1330 .unlink = udf_unlink,
1331 .symlink = udf_symlink,
1335 .rename = udf_rename,
1336 .tmpfile = udf_tmpfile,