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/smp_lock.h>
31 #include <linux/buffer_head.h>
32 #include <linux/sched.h>
33 #include <linux/crc-itu-t.h>
34 #include <linux/exportfs.h>
36 static inline int udf_match(int len1, const unsigned char *name1, int len2,
37 const unsigned char *name2)
42 return !memcmp(name1, name2, len1);
45 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
46 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
47 uint8_t *impuse, uint8_t *fileident)
49 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag);
52 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
53 uint8_t lfi = cfi->lengthFileIdent;
54 int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
55 sizeof(struct fileIdentDesc);
58 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
61 offset = fibh->soffset + sizeof(struct fileIdentDesc);
64 if (adinicb || (offset + liu < 0)) {
65 memcpy((uint8_t *)sfi->impUse, impuse, liu);
66 } else if (offset >= 0) {
67 memcpy(fibh->ebh->b_data + offset, impuse, liu);
69 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
70 memcpy(fibh->ebh->b_data, impuse - offset,
78 if (adinicb || (offset + lfi < 0)) {
79 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
80 } else if (offset >= 0) {
81 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
83 memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
85 memcpy(fibh->ebh->b_data, fileident - offset,
92 if (adinicb || (offset + padlen < 0)) {
93 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
94 } else if (offset >= 0) {
95 memset(fibh->ebh->b_data + offset, 0x00, padlen);
97 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
98 memset(fibh->ebh->b_data, 0x00, padlen + offset);
101 crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
102 sizeof(struct fileIdentDesc) - sizeof(struct tag));
104 if (fibh->sbh == fibh->ebh) {
105 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
106 crclen + sizeof(struct tag) -
107 sizeof(struct fileIdentDesc));
108 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
109 crc = crc_itu_t(crc, fibh->ebh->b_data +
110 sizeof(struct fileIdentDesc) +
112 crclen + sizeof(struct tag) -
113 sizeof(struct fileIdentDesc));
115 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
116 -fibh->soffset - sizeof(struct fileIdentDesc));
117 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
120 cfi->descTag.descCRC = cpu_to_le16(crc);
121 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
122 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
124 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
125 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
126 sizeof(struct fileIdentDesc));
128 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
129 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
130 sizeof(struct fileIdentDesc) + fibh->soffset);
134 mark_inode_dirty(inode);
136 if (fibh->sbh != fibh->ebh)
137 mark_buffer_dirty_inode(fibh->ebh, inode);
138 mark_buffer_dirty_inode(fibh->sbh, inode);
143 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
144 const struct qstr *child,
145 struct udf_fileident_bh *fibh,
146 struct fileIdentDesc *cfi)
148 struct fileIdentDesc *fi = NULL;
151 unsigned char *fname = NULL;
152 unsigned char *nameptr;
156 struct kernel_lb_addr eloc;
159 struct extent_position epos = {};
160 struct udf_inode_info *dinfo = UDF_I(dir);
161 int isdotdot = child->len == 2 &&
162 child->name[0] == '.' && child->name[1] == '.';
164 size = udf_ext0_offset(dir) + dir->i_size;
165 f_pos = udf_ext0_offset(dir);
167 fibh->sbh = fibh->ebh = NULL;
168 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
169 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
170 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
171 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
173 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
174 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
175 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
176 epos.offset -= sizeof(struct short_ad);
177 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
178 epos.offset -= sizeof(struct long_ad);
182 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
187 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
191 while (f_pos < size) {
192 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
197 liu = le16_to_cpu(cfi->lengthOfImpUse);
198 lfi = cfi->lengthFileIdent;
200 if (fibh->sbh == fibh->ebh) {
201 nameptr = fi->fileIdent + liu;
203 int poffset; /* Unpaded ending offset */
205 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
209 nameptr = (uint8_t *)(fibh->ebh->b_data +
213 memcpy(nameptr, fi->fileIdent + liu,
215 memcpy(nameptr + lfi - poffset,
216 fibh->ebh->b_data, poffset);
220 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
221 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
225 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
226 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
230 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
239 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
240 if (flen && udf_match(flen, fname, child->len, child->name))
246 if (fibh->sbh != fibh->ebh)
256 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
257 struct nameidata *nd)
259 struct inode *inode = NULL;
260 struct fileIdentDesc cfi;
261 struct udf_fileident_bh fibh;
263 if (dentry->d_name.len > UDF_NAME_LEN - 2)
264 return ERR_PTR(-ENAMETOOLONG);
268 /* temporary shorthand for specifying files by inode number */
269 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
270 struct kernel_lb_addr lb = {
271 .logicalBlockNum = 0,
272 .partitionReferenceNum =
273 simple_strtoul(dentry->d_name.name + 3,
276 inode = udf_iget(dir->i_sb, lb);
279 return ERR_PTR(-EACCES);
282 #endif /* UDF_RECOVERY */
284 if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
285 struct kernel_lb_addr loc;
287 if (fibh.sbh != fibh.ebh)
291 loc = lelb_to_cpu(cfi.icb.extLocation);
292 inode = udf_iget(dir->i_sb, &loc);
295 return ERR_PTR(-EACCES);
300 return d_splice_alias(inode, dentry);
303 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
304 struct dentry *dentry,
305 struct udf_fileident_bh *fibh,
306 struct fileIdentDesc *cfi, int *err)
308 struct super_block *sb = dir->i_sb;
309 struct fileIdentDesc *fi = NULL;
310 unsigned char *name = NULL;
313 loff_t size = udf_ext0_offset(dir) + dir->i_size;
318 struct kernel_lb_addr eloc;
321 struct extent_position epos = {};
322 struct udf_inode_info *dinfo;
324 fibh->sbh = fibh->ebh = NULL;
325 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
332 if (!dentry->d_name.len) {
336 namelen = udf_put_filename(sb, dentry->d_name.name, name,
339 *err = -ENAMETOOLONG;
346 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
348 f_pos = udf_ext0_offset(dir);
350 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
352 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
353 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
354 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
355 block = udf_get_lb_pblock(dir->i_sb,
356 &dinfo->i_location, 0);
357 fibh->soffset = fibh->eoffset = sb->s_blocksize;
360 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
361 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
362 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
363 epos.offset -= sizeof(struct short_ad);
364 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
365 epos.offset -= sizeof(struct long_ad);
369 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
375 block = dinfo->i_location.logicalBlockNum;
378 while (f_pos < size) {
379 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
387 liu = le16_to_cpu(cfi->lengthOfImpUse);
388 lfi = cfi->lengthFileIdent;
390 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
391 if (((sizeof(struct fileIdentDesc) +
392 liu + lfi + 3) & ~3) == nfidlen) {
393 cfi->descTag.tagSerialNum = cpu_to_le16(1);
394 cfi->fileVersionNum = cpu_to_le16(1);
395 cfi->fileCharacteristics = 0;
396 cfi->lengthFileIdent = namelen;
397 cfi->lengthOfImpUse = cpu_to_le16(0);
398 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
412 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
413 sb->s_blocksize - fibh->eoffset < nfidlen) {
416 fibh->soffset -= udf_ext0_offset(dir);
417 fibh->eoffset -= udf_ext0_offset(dir);
418 f_pos -= udf_ext0_offset(dir);
419 if (fibh->sbh != fibh->ebh)
422 fibh->sbh = fibh->ebh =
423 udf_expand_dir_adinicb(dir, &block, err);
426 epos.block = dinfo->i_location;
427 epos.offset = udf_file_entry_alloc_offset(dir);
428 /* Load extent udf_expand_dir_adinicb() has created */
429 udf_current_aext(dir, &epos, &eloc, &elen, 1);
432 /* Entry fits into current block? */
433 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
434 fibh->soffset = fibh->eoffset;
435 fibh->eoffset += nfidlen;
436 if (fibh->sbh != fibh->ebh) {
438 fibh->sbh = fibh->ebh;
441 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
442 block = dinfo->i_location.logicalBlockNum;
443 fi = (struct fileIdentDesc *)
444 (dinfo->i_ext.i_data +
446 udf_ext0_offset(dir) +
449 block = eloc.logicalBlockNum +
451 dir->i_sb->s_blocksize_bits);
452 fi = (struct fileIdentDesc *)
453 (fibh->sbh->b_data + fibh->soffset);
456 /* Round up last extent in the file */
457 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
458 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
459 epos.offset -= sizeof(struct short_ad);
460 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
461 epos.offset -= sizeof(struct long_ad);
462 udf_write_aext(dir, &epos, &eloc, elen, 1);
463 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
464 - 1) & ~(sb->s_blocksize - 1);
466 fibh->soffset = fibh->eoffset - sb->s_blocksize;
467 fibh->eoffset += nfidlen - sb->s_blocksize;
468 if (fibh->sbh != fibh->ebh) {
470 fibh->sbh = fibh->ebh;
473 block = eloc.logicalBlockNum + ((elen - 1) >>
474 dir->i_sb->s_blocksize_bits);
475 fibh->ebh = udf_bread(dir,
476 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
480 if (!fibh->soffset) {
481 if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
482 (EXT_RECORDED_ALLOCATED >> 30)) {
483 block = eloc.logicalBlockNum + ((elen - 1) >>
484 dir->i_sb->s_blocksize_bits);
489 fibh->sbh = fibh->ebh;
490 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
492 fi = (struct fileIdentDesc *)
493 (fibh->sbh->b_data + sb->s_blocksize +
498 memset(cfi, 0, sizeof(struct fileIdentDesc));
499 if (UDF_SB(sb)->s_udfrev >= 0x0200)
500 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
503 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
505 cfi->fileVersionNum = cpu_to_le16(1);
506 cfi->lengthFileIdent = namelen;
507 cfi->lengthOfImpUse = cpu_to_le16(0);
508 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
509 dir->i_size += nfidlen;
510 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
511 dinfo->i_lenAlloc += nfidlen;
513 /* Find the last extent and truncate it to proper size */
514 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
515 (EXT_RECORDED_ALLOCATED >> 30))
517 elen -= dinfo->i_lenExtents - dir->i_size;
518 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
519 epos.offset -= sizeof(struct short_ad);
520 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
521 epos.offset -= sizeof(struct long_ad);
522 udf_write_aext(dir, &epos, &eloc, elen, 1);
523 dinfo->i_lenExtents = dir->i_size;
526 mark_inode_dirty(dir);
535 if (fibh->sbh != fibh->ebh)
544 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
545 struct udf_fileident_bh *fibh,
546 struct fileIdentDesc *cfi)
548 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
550 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
551 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
553 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
556 static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
557 struct nameidata *nd)
559 struct udf_fileident_bh fibh;
561 struct fileIdentDesc cfi, *fi;
563 struct udf_inode_info *iinfo;
566 inode = udf_new_inode(dir, mode, &err);
572 iinfo = UDF_I(inode);
573 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
574 inode->i_data.a_ops = &udf_adinicb_aops;
576 inode->i_data.a_ops = &udf_aops;
577 inode->i_op = &udf_file_inode_operations;
578 inode->i_fop = &udf_file_operations;
579 mark_inode_dirty(inode);
581 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
584 mark_inode_dirty(inode);
589 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
590 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
591 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
592 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
593 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
594 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
595 mark_inode_dirty(dir);
596 if (fibh.sbh != fibh.ebh)
600 d_instantiate(dentry, inode);
605 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
609 struct udf_fileident_bh fibh;
610 struct fileIdentDesc cfi, *fi;
612 struct udf_inode_info *iinfo;
614 if (!old_valid_dev(rdev))
619 inode = udf_new_inode(dir, mode, &err);
623 iinfo = UDF_I(inode);
624 init_special_inode(inode, mode, rdev);
625 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
628 mark_inode_dirty(inode);
633 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
634 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
635 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
636 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
637 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
638 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
639 mark_inode_dirty(dir);
640 mark_inode_dirty(inode);
642 if (fibh.sbh != fibh.ebh)
645 d_instantiate(dentry, inode);
653 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
656 struct udf_fileident_bh fibh;
657 struct fileIdentDesc cfi, *fi;
659 struct udf_inode_info *dinfo = UDF_I(dir);
660 struct udf_inode_info *iinfo;
664 if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
668 inode = udf_new_inode(dir, S_IFDIR | mode, &err);
672 iinfo = UDF_I(inode);
673 inode->i_op = &udf_dir_inode_operations;
674 inode->i_fop = &udf_dir_operations;
675 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
678 mark_inode_dirty(inode);
683 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
684 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
685 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
686 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
687 cfi.fileCharacteristics =
688 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
689 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
691 mark_inode_dirty(inode);
693 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
696 mark_inode_dirty(inode);
700 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
701 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
702 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
703 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
704 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
705 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
707 mark_inode_dirty(dir);
708 d_instantiate(dentry, inode);
709 if (fibh.sbh != fibh.ebh)
719 static int empty_dir(struct inode *dir)
721 struct fileIdentDesc *fi, cfi;
722 struct udf_fileident_bh fibh;
724 loff_t size = udf_ext0_offset(dir) + dir->i_size;
726 struct kernel_lb_addr eloc;
729 struct extent_position epos = {};
730 struct udf_inode_info *dinfo = UDF_I(dir);
732 f_pos = udf_ext0_offset(dir);
733 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
735 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
736 fibh.sbh = fibh.ebh = NULL;
737 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
738 &epos, &eloc, &elen, &offset) ==
739 (EXT_RECORDED_ALLOCATED >> 30)) {
740 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
741 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
742 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
743 epos.offset -= sizeof(struct short_ad);
744 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
745 epos.offset -= sizeof(struct long_ad);
749 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
759 while (f_pos < size) {
760 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
763 if (fibh.sbh != fibh.ebh)
770 if (cfi.lengthFileIdent &&
771 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
772 if (fibh.sbh != fibh.ebh)
780 if (fibh.sbh != fibh.ebh)
788 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
791 struct inode *inode = dentry->d_inode;
792 struct udf_fileident_bh fibh;
793 struct fileIdentDesc *fi, cfi;
794 struct kernel_lb_addr tloc;
798 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
803 tloc = lelb_to_cpu(cfi.icb.extLocation);
804 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
807 if (!empty_dir(inode))
809 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
812 if (inode->i_nlink != 2)
813 udf_warning(inode->i_sb, "udf_rmdir",
814 "empty directory has nlink != 2 (%d)",
818 inode_dec_link_count(dir);
819 inode->i_ctime = dir->i_ctime = dir->i_mtime =
820 current_fs_time(dir->i_sb);
821 mark_inode_dirty(dir);
824 if (fibh.sbh != fibh.ebh)
833 static int udf_unlink(struct inode *dir, struct dentry *dentry)
836 struct inode *inode = dentry->d_inode;
837 struct udf_fileident_bh fibh;
838 struct fileIdentDesc *fi;
839 struct fileIdentDesc cfi;
840 struct kernel_lb_addr tloc;
844 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
849 tloc = lelb_to_cpu(cfi.icb.extLocation);
850 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
853 if (!inode->i_nlink) {
854 udf_debug("Deleting nonexistent file (%lu), %d\n",
855 inode->i_ino, inode->i_nlink);
858 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
861 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
862 mark_inode_dirty(dir);
863 inode_dec_link_count(inode);
864 inode->i_ctime = dir->i_ctime;
868 if (fibh.sbh != fibh.ebh)
877 static int udf_symlink(struct inode *dir, struct dentry *dentry,
881 struct pathComponent *pc;
882 const char *compstart;
883 struct udf_fileident_bh fibh;
884 struct extent_position epos = {};
885 int eoffset, elen = 0;
886 struct fileIdentDesc *fi;
887 struct fileIdentDesc cfi;
891 unsigned char *name = NULL;
893 struct buffer_head *bh;
894 struct udf_inode_info *iinfo;
897 inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err);
901 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
907 iinfo = UDF_I(inode);
908 inode->i_data.a_ops = &udf_symlink_aops;
909 inode->i_op = &udf_symlink_inode_operations;
911 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
912 struct kernel_lb_addr eloc;
915 block = udf_new_block(inode->i_sb, inode,
916 iinfo->i_location.partitionReferenceNum,
917 iinfo->i_location.logicalBlockNum, &err);
920 epos.block = iinfo->i_location;
921 epos.offset = udf_file_entry_alloc_offset(inode);
923 eloc.logicalBlockNum = block;
924 eloc.partitionReferenceNum =
925 iinfo->i_location.partitionReferenceNum;
926 bsize = inode->i_sb->s_blocksize;
927 iinfo->i_lenExtents = bsize;
928 udf_add_aext(inode, &epos, &eloc, bsize, 0);
931 block = udf_get_pblock(inode->i_sb, block,
932 iinfo->i_location.partitionReferenceNum,
934 epos.bh = udf_tgetblk(inode->i_sb, block);
935 lock_buffer(epos.bh);
936 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
937 set_buffer_uptodate(epos.bh);
938 unlock_buffer(epos.bh);
939 mark_buffer_dirty_inode(epos.bh, inode);
940 ea = epos.bh->b_data + udf_ext0_offset(inode);
942 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
944 eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
945 pc = (struct pathComponent *)ea;
947 if (*symname == '/') {
950 } while (*symname == '/');
952 pc->componentType = 1;
953 pc->lengthComponentIdent = 0;
954 pc->componentFileVersionNum = 0;
955 elen += sizeof(struct pathComponent);
961 if (elen + sizeof(struct pathComponent) > eoffset)
964 pc = (struct pathComponent *)(ea + elen);
970 } while (*symname && *symname != '/');
972 pc->componentType = 5;
973 pc->lengthComponentIdent = 0;
974 pc->componentFileVersionNum = 0;
975 if (compstart[0] == '.') {
976 if ((symname - compstart) == 1)
977 pc->componentType = 4;
978 else if ((symname - compstart) == 2 &&
980 pc->componentType = 3;
983 if (pc->componentType == 5) {
984 namelen = udf_put_filename(inode->i_sb, compstart, name,
985 symname - compstart);
989 if (elen + sizeof(struct pathComponent) + namelen >
993 pc->lengthComponentIdent = namelen;
995 memcpy(pc->componentIdent, name, namelen);
998 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1003 } while (*symname == '/');
1008 inode->i_size = elen;
1009 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1010 iinfo->i_lenAlloc = inode->i_size;
1012 udf_truncate_tail_extent(inode);
1013 mark_inode_dirty(inode);
1015 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1018 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1019 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
1020 bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1022 struct logicalVolIntegrityDesc *lvid =
1023 (struct logicalVolIntegrityDesc *)bh->b_data;
1024 struct logicalVolHeaderDesc *lvhd;
1026 lvhd = (struct logicalVolHeaderDesc *)
1027 lvid->logicalVolContentsUse;
1028 uniqueID = le64_to_cpu(lvhd->uniqueID);
1029 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1030 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1031 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1033 lvhd->uniqueID = cpu_to_le64(uniqueID);
1034 mark_buffer_dirty(bh);
1036 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1037 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1038 mark_inode_dirty(dir);
1039 if (fibh.sbh != fibh.ebh)
1042 d_instantiate(dentry, inode);
1051 inode_dec_link_count(inode);
1056 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1057 struct dentry *dentry)
1059 struct inode *inode = old_dentry->d_inode;
1060 struct udf_fileident_bh fibh;
1061 struct fileIdentDesc cfi, *fi;
1063 struct buffer_head *bh;
1066 if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
1071 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1076 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1077 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1078 bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1080 struct logicalVolIntegrityDesc *lvid =
1081 (struct logicalVolIntegrityDesc *)bh->b_data;
1082 struct logicalVolHeaderDesc *lvhd;
1084 lvhd = (struct logicalVolHeaderDesc *)
1085 (lvid->logicalVolContentsUse);
1086 uniqueID = le64_to_cpu(lvhd->uniqueID);
1087 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1088 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1089 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1091 lvhd->uniqueID = cpu_to_le64(uniqueID);
1092 mark_buffer_dirty(bh);
1094 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1095 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1096 mark_inode_dirty(dir);
1098 if (fibh.sbh != fibh.ebh)
1102 inode->i_ctime = current_fs_time(inode->i_sb);
1103 mark_inode_dirty(inode);
1105 d_instantiate(dentry, inode);
1111 /* Anybody can rename anything with this: the permission checks are left to the
1112 * higher-level routines.
1114 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1115 struct inode *new_dir, struct dentry *new_dentry)
1117 struct inode *old_inode = old_dentry->d_inode;
1118 struct inode *new_inode = new_dentry->d_inode;
1119 struct udf_fileident_bh ofibh, nfibh;
1120 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1121 struct fileIdentDesc ocfi, ncfi;
1122 struct buffer_head *dir_bh = NULL;
1123 int retval = -ENOENT;
1124 struct kernel_lb_addr tloc;
1125 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1128 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1130 if (ofibh.sbh != ofibh.ebh)
1134 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1135 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
1136 != old_inode->i_ino)
1139 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
1142 if (nfibh.sbh != nfibh.ebh)
1148 if (S_ISDIR(old_inode->i_mode)) {
1149 int offset = udf_ext0_offset(old_inode);
1152 retval = -ENOTEMPTY;
1153 if (!empty_dir(new_inode))
1157 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1158 dir_fi = udf_get_fileident(
1159 old_iinfo->i_ext.i_data -
1161 sizeof(struct extendedFileEntry) :
1162 sizeof(struct fileEntry)),
1163 old_inode->i_sb->s_blocksize, &offset);
1165 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1168 dir_fi = udf_get_fileident(dir_bh->b_data,
1169 old_inode->i_sb->s_blocksize, &offset);
1173 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1174 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
1181 (256 << sizeof(new_dir->i_nlink)) - 1)
1185 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1192 * Like most other Unix systems, set the ctime for inodes on a
1195 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1196 mark_inode_dirty(old_inode);
1201 ncfi.fileVersionNum = ocfi.fileVersionNum;
1202 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1203 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
1204 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1206 /* The old fid may have moved - find it again */
1207 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1208 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1211 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1212 inode_dec_link_count(new_inode);
1214 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1215 mark_inode_dirty(old_dir);
1218 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1219 udf_update_tag((char *)dir_fi,
1220 (sizeof(struct fileIdentDesc) +
1221 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1222 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1223 mark_inode_dirty(old_inode);
1225 mark_buffer_dirty_inode(dir_bh, old_inode);
1227 inode_dec_link_count(old_dir);
1229 inode_dec_link_count(new_inode);
1232 mark_inode_dirty(new_dir);
1237 if (ofibh.sbh != ofibh.ebh)
1247 if (nfibh.sbh != nfibh.ebh)
1256 static struct dentry *udf_get_parent(struct dentry *child)
1258 struct kernel_lb_addr tloc;
1259 struct inode *inode = NULL;
1260 struct qstr dotdot = {.name = "..", .len = 2};
1261 struct fileIdentDesc cfi;
1262 struct udf_fileident_bh fibh;
1265 if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
1268 if (fibh.sbh != fibh.ebh)
1272 tloc = lelb_to_cpu(cfi.icb.extLocation);
1273 inode = udf_iget(child->d_inode->i_sb, &tloc);
1278 return d_obtain_alias(inode);
1281 return ERR_PTR(-EACCES);
1285 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1286 u16 partref, __u32 generation)
1288 struct inode *inode;
1289 struct kernel_lb_addr loc;
1292 return ERR_PTR(-ESTALE);
1294 loc.logicalBlockNum = block;
1295 loc.partitionReferenceNum = partref;
1296 inode = udf_iget(sb, &loc);
1299 return ERR_PTR(-ENOMEM);
1301 if (generation && inode->i_generation != generation) {
1303 return ERR_PTR(-ESTALE);
1305 return d_obtain_alias(inode);
1308 static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1309 struct fid *fid, int fh_len, int fh_type)
1311 if ((fh_len != 3 && fh_len != 5) ||
1312 (fh_type != FILEID_UDF_WITH_PARENT &&
1313 fh_type != FILEID_UDF_WITHOUT_PARENT))
1316 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1317 fid->udf.generation);
1320 static struct dentry *udf_fh_to_parent(struct super_block *sb,
1321 struct fid *fid, int fh_len, int fh_type)
1323 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
1326 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1327 fid->udf.parent_partref,
1328 fid->udf.parent_generation);
1330 static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp,
1334 struct inode *inode = de->d_inode;
1335 struct kernel_lb_addr location = UDF_I(inode)->i_location;
1336 struct fid *fid = (struct fid *)fh;
1337 int type = FILEID_UDF_WITHOUT_PARENT;
1339 if (len < 3 || (connectable && len < 5))
1343 fid->udf.block = location.logicalBlockNum;
1344 fid->udf.partref = location.partitionReferenceNum;
1345 fid->udf.generation = inode->i_generation;
1347 if (connectable && !S_ISDIR(inode->i_mode)) {
1348 spin_lock(&de->d_lock);
1349 inode = de->d_parent->d_inode;
1350 location = UDF_I(inode)->i_location;
1351 fid->udf.parent_block = location.logicalBlockNum;
1352 fid->udf.parent_partref = location.partitionReferenceNum;
1353 fid->udf.parent_generation = inode->i_generation;
1354 spin_unlock(&de->d_lock);
1356 type = FILEID_UDF_WITH_PARENT;
1362 const struct export_operations udf_export_ops = {
1363 .encode_fh = udf_encode_fh,
1364 .fh_to_dentry = udf_fh_to_dentry,
1365 .fh_to_parent = udf_fh_to_parent,
1366 .get_parent = udf_get_parent,
1369 const struct inode_operations udf_dir_inode_operations = {
1370 .lookup = udf_lookup,
1371 .create = udf_create,
1373 .unlink = udf_unlink,
1374 .symlink = udf_symlink,
1378 .rename = udf_rename,
1380 const struct inode_operations udf_symlink_inode_operations = {
1381 .readlink = generic_readlink,
1382 .follow_link = page_follow_link_light,
1383 .put_link = page_put_link,