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/buffer_head.h>
31 #include <linux/sched.h>
32 #include <linux/crc-itu-t.h>
33 #include <linux/exportfs.h>
35 static inline int udf_match(int len1, const unsigned char *name1, int len2,
36 const unsigned char *name2)
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(struct 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 = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
101 sizeof(struct fileIdentDesc) - sizeof(struct tag));
103 if (fibh->sbh == fibh->ebh) {
104 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
105 crclen + sizeof(struct tag) -
106 sizeof(struct fileIdentDesc));
107 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
108 crc = crc_itu_t(crc, fibh->ebh->b_data +
109 sizeof(struct fileIdentDesc) +
111 crclen + sizeof(struct tag) -
112 sizeof(struct fileIdentDesc));
114 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
115 -fibh->soffset - sizeof(struct fileIdentDesc));
116 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
119 cfi->descTag.descCRC = cpu_to_le16(crc);
120 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
121 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
123 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
124 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
125 sizeof(struct fileIdentDesc));
127 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
128 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
129 sizeof(struct fileIdentDesc) + fibh->soffset);
133 mark_inode_dirty(inode);
135 if (fibh->sbh != fibh->ebh)
136 mark_buffer_dirty_inode(fibh->ebh, inode);
137 mark_buffer_dirty_inode(fibh->sbh, inode);
142 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
143 const struct qstr *child,
144 struct udf_fileident_bh *fibh,
145 struct fileIdentDesc *cfi)
147 struct fileIdentDesc *fi = NULL;
150 unsigned char *fname = NULL;
151 unsigned char *nameptr;
155 struct kernel_lb_addr eloc;
158 struct extent_position epos = {};
159 struct udf_inode_info *dinfo = UDF_I(dir);
160 int isdotdot = child->len == 2 &&
161 child->name[0] == '.' && child->name[1] == '.';
163 size = udf_ext0_offset(dir) + dir->i_size;
164 f_pos = udf_ext0_offset(dir);
166 fibh->sbh = fibh->ebh = NULL;
167 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
168 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
169 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
170 &eloc, &elen, &offset) != (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(struct short_ad);
176 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
177 epos.offset -= sizeof(struct long_ad);
181 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
186 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
190 while (f_pos < size) {
191 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
196 liu = le16_to_cpu(cfi->lengthOfImpUse);
197 lfi = cfi->lengthFileIdent;
199 if (fibh->sbh == fibh->ebh) {
200 nameptr = fi->fileIdent + liu;
202 int poffset; /* Unpaded ending offset */
204 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
208 nameptr = (uint8_t *)(fibh->ebh->b_data +
212 memcpy(nameptr, fi->fileIdent + liu,
214 memcpy(nameptr + lfi - poffset,
215 fibh->ebh->b_data, poffset);
219 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
220 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
224 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
225 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
229 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
236 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
237 if (flen && udf_match(flen, fname, child->len, child->name))
243 if (fibh->sbh != fibh->ebh)
253 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
256 struct inode *inode = NULL;
257 struct fileIdentDesc cfi;
258 struct udf_fileident_bh fibh;
260 if (dentry->d_name.len > UDF_NAME_LEN - 2)
261 return ERR_PTR(-ENAMETOOLONG);
264 /* temporary shorthand for specifying files by inode number */
265 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
266 struct kernel_lb_addr lb = {
267 .logicalBlockNum = 0,
268 .partitionReferenceNum =
269 simple_strtoul(dentry->d_name.name + 3,
272 inode = udf_iget(dir->i_sb, lb);
276 #endif /* UDF_RECOVERY */
278 if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
279 struct kernel_lb_addr loc;
281 if (fibh.sbh != fibh.ebh)
285 loc = lelb_to_cpu(cfi.icb.extLocation);
286 inode = udf_iget(dir->i_sb, &loc);
288 return ERR_CAST(inode);
291 return d_splice_alias(inode, dentry);
294 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
295 struct dentry *dentry,
296 struct udf_fileident_bh *fibh,
297 struct fileIdentDesc *cfi, int *err)
299 struct super_block *sb = dir->i_sb;
300 struct fileIdentDesc *fi = NULL;
301 unsigned char *name = NULL;
304 loff_t size = udf_ext0_offset(dir) + dir->i_size;
309 struct kernel_lb_addr eloc;
312 struct extent_position epos = {};
313 struct udf_inode_info *dinfo;
315 fibh->sbh = fibh->ebh = NULL;
316 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
323 if (!dentry->d_name.len) {
327 namelen = udf_put_filename(sb, dentry->d_name.name, name,
330 *err = -ENAMETOOLONG;
337 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
339 f_pos = udf_ext0_offset(dir);
341 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
343 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
344 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
345 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
346 block = udf_get_lb_pblock(dir->i_sb,
347 &dinfo->i_location, 0);
348 fibh->soffset = fibh->eoffset = sb->s_blocksize;
351 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
352 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
353 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
354 epos.offset -= sizeof(struct short_ad);
355 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
356 epos.offset -= sizeof(struct long_ad);
360 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
366 block = dinfo->i_location.logicalBlockNum;
369 while (f_pos < size) {
370 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
378 liu = le16_to_cpu(cfi->lengthOfImpUse);
379 lfi = cfi->lengthFileIdent;
381 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
382 if (((sizeof(struct fileIdentDesc) +
383 liu + lfi + 3) & ~3) == nfidlen) {
384 cfi->descTag.tagSerialNum = cpu_to_le16(1);
385 cfi->fileVersionNum = cpu_to_le16(1);
386 cfi->fileCharacteristics = 0;
387 cfi->lengthFileIdent = namelen;
388 cfi->lengthOfImpUse = cpu_to_le16(0);
389 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
403 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
404 sb->s_blocksize - fibh->eoffset < nfidlen) {
407 fibh->soffset -= udf_ext0_offset(dir);
408 fibh->eoffset -= udf_ext0_offset(dir);
409 f_pos -= udf_ext0_offset(dir);
410 if (fibh->sbh != fibh->ebh)
413 fibh->sbh = fibh->ebh =
414 udf_expand_dir_adinicb(dir, &block, err);
417 epos.block = dinfo->i_location;
418 epos.offset = udf_file_entry_alloc_offset(dir);
419 /* Load extent udf_expand_dir_adinicb() has created */
420 udf_current_aext(dir, &epos, &eloc, &elen, 1);
423 /* Entry fits into current block? */
424 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
425 fibh->soffset = fibh->eoffset;
426 fibh->eoffset += nfidlen;
427 if (fibh->sbh != fibh->ebh) {
429 fibh->sbh = fibh->ebh;
432 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
433 block = dinfo->i_location.logicalBlockNum;
434 fi = (struct fileIdentDesc *)
435 (dinfo->i_ext.i_data +
437 udf_ext0_offset(dir) +
440 block = eloc.logicalBlockNum +
442 dir->i_sb->s_blocksize_bits);
443 fi = (struct fileIdentDesc *)
444 (fibh->sbh->b_data + fibh->soffset);
447 /* Round up last extent in the file */
448 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
449 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
450 epos.offset -= sizeof(struct short_ad);
451 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
452 epos.offset -= sizeof(struct long_ad);
453 udf_write_aext(dir, &epos, &eloc, elen, 1);
454 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
455 - 1) & ~(sb->s_blocksize - 1);
457 fibh->soffset = fibh->eoffset - sb->s_blocksize;
458 fibh->eoffset += nfidlen - sb->s_blocksize;
459 if (fibh->sbh != fibh->ebh) {
461 fibh->sbh = fibh->ebh;
464 block = eloc.logicalBlockNum + ((elen - 1) >>
465 dir->i_sb->s_blocksize_bits);
466 fibh->ebh = udf_bread(dir,
467 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
470 /* Extents could have been merged, invalidate our position */
473 epos.block = dinfo->i_location;
474 epos.offset = udf_file_entry_alloc_offset(dir);
476 if (!fibh->soffset) {
477 /* Find the freshly allocated block */
478 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
479 (EXT_RECORDED_ALLOCATED >> 30))
481 block = eloc.logicalBlockNum + ((elen - 1) >>
482 dir->i_sb->s_blocksize_bits);
484 fibh->sbh = fibh->ebh;
485 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
487 fi = (struct fileIdentDesc *)
488 (fibh->sbh->b_data + sb->s_blocksize +
493 memset(cfi, 0, sizeof(struct fileIdentDesc));
494 if (UDF_SB(sb)->s_udfrev >= 0x0200)
495 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
498 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
500 cfi->fileVersionNum = cpu_to_le16(1);
501 cfi->lengthFileIdent = namelen;
502 cfi->lengthOfImpUse = cpu_to_le16(0);
503 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
504 dir->i_size += nfidlen;
505 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
506 dinfo->i_lenAlloc += nfidlen;
508 /* Find the last extent and truncate it to proper size */
509 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
510 (EXT_RECORDED_ALLOCATED >> 30))
512 elen -= dinfo->i_lenExtents - dir->i_size;
513 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
514 epos.offset -= sizeof(struct short_ad);
515 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
516 epos.offset -= sizeof(struct long_ad);
517 udf_write_aext(dir, &epos, &eloc, elen, 1);
518 dinfo->i_lenExtents = dir->i_size;
521 mark_inode_dirty(dir);
530 if (fibh->sbh != fibh->ebh)
539 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
540 struct udf_fileident_bh *fibh,
541 struct fileIdentDesc *cfi)
543 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
545 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
546 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
548 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
551 static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
553 struct udf_inode_info *iinfo = UDF_I(inode);
554 struct inode *dir = dentry->d_parent->d_inode;
555 struct udf_fileident_bh fibh;
556 struct fileIdentDesc cfi, *fi;
559 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
561 inode_dec_link_count(inode);
562 unlock_new_inode(inode);
566 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
567 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
568 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
569 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
570 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
571 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
572 mark_inode_dirty(dir);
573 if (fibh.sbh != fibh.ebh)
576 unlock_new_inode(inode);
577 d_instantiate(dentry, inode);
582 static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
588 inode = udf_new_inode(dir, mode, &err);
593 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
594 inode->i_data.a_ops = &udf_adinicb_aops;
596 inode->i_data.a_ops = &udf_aops;
597 inode->i_op = &udf_file_inode_operations;
598 inode->i_fop = &udf_file_operations;
599 mark_inode_dirty(inode);
601 return udf_add_nondir(dentry, inode);
604 static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
607 struct udf_inode_info *iinfo;
610 inode = udf_new_inode(dir, mode, &err);
614 iinfo = UDF_I(inode);
615 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
616 inode->i_data.a_ops = &udf_adinicb_aops;
618 inode->i_data.a_ops = &udf_aops;
619 inode->i_op = &udf_file_inode_operations;
620 inode->i_fop = &udf_file_operations;
621 mark_inode_dirty(inode);
623 d_tmpfile(dentry, inode);
624 unlock_new_inode(inode);
628 static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
634 if (!old_valid_dev(rdev))
638 inode = udf_new_inode(dir, mode, &err);
642 init_special_inode(inode, mode, rdev);
643 return udf_add_nondir(dentry, inode);
646 static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
649 struct udf_fileident_bh fibh;
650 struct fileIdentDesc cfi, *fi;
652 struct udf_inode_info *dinfo = UDF_I(dir);
653 struct udf_inode_info *iinfo;
656 inode = udf_new_inode(dir, S_IFDIR | mode, &err);
660 iinfo = UDF_I(inode);
661 inode->i_op = &udf_dir_inode_operations;
662 inode->i_fop = &udf_dir_operations;
663 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
665 inode_dec_link_count(inode);
666 unlock_new_inode(inode);
671 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
672 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
673 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
674 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
675 cfi.fileCharacteristics =
676 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
677 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
679 mark_inode_dirty(inode);
681 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
684 mark_inode_dirty(inode);
685 unlock_new_inode(inode);
689 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
690 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
691 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
692 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
693 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
694 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
696 mark_inode_dirty(dir);
697 unlock_new_inode(inode);
698 d_instantiate(dentry, inode);
699 if (fibh.sbh != fibh.ebh)
708 static int empty_dir(struct inode *dir)
710 struct fileIdentDesc *fi, cfi;
711 struct udf_fileident_bh fibh;
713 loff_t size = udf_ext0_offset(dir) + dir->i_size;
715 struct kernel_lb_addr eloc;
718 struct extent_position epos = {};
719 struct udf_inode_info *dinfo = UDF_I(dir);
721 f_pos = udf_ext0_offset(dir);
722 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
724 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
725 fibh.sbh = fibh.ebh = NULL;
726 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
727 &epos, &eloc, &elen, &offset) ==
728 (EXT_RECORDED_ALLOCATED >> 30)) {
729 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
730 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
731 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
732 epos.offset -= sizeof(struct short_ad);
733 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
734 epos.offset -= sizeof(struct long_ad);
738 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
748 while (f_pos < size) {
749 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
752 if (fibh.sbh != fibh.ebh)
759 if (cfi.lengthFileIdent &&
760 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
761 if (fibh.sbh != fibh.ebh)
769 if (fibh.sbh != fibh.ebh)
777 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
780 struct inode *inode = dentry->d_inode;
781 struct udf_fileident_bh fibh;
782 struct fileIdentDesc *fi, cfi;
783 struct kernel_lb_addr tloc;
786 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
791 tloc = lelb_to_cpu(cfi.icb.extLocation);
792 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
795 if (!empty_dir(inode))
797 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
800 if (inode->i_nlink != 2)
801 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
805 inode_dec_link_count(dir);
806 inode->i_ctime = dir->i_ctime = dir->i_mtime =
807 current_fs_time(dir->i_sb);
808 mark_inode_dirty(dir);
811 if (fibh.sbh != fibh.ebh)
819 static int udf_unlink(struct inode *dir, struct dentry *dentry)
822 struct inode *inode = dentry->d_inode;
823 struct udf_fileident_bh fibh;
824 struct fileIdentDesc *fi;
825 struct fileIdentDesc cfi;
826 struct kernel_lb_addr tloc;
829 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
834 tloc = lelb_to_cpu(cfi.icb.extLocation);
835 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
838 if (!inode->i_nlink) {
839 udf_debug("Deleting nonexistent file (%lu), %d\n",
840 inode->i_ino, inode->i_nlink);
843 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
846 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
847 mark_inode_dirty(dir);
848 inode_dec_link_count(inode);
849 inode->i_ctime = dir->i_ctime;
853 if (fibh.sbh != fibh.ebh)
861 static int udf_symlink(struct inode *dir, struct dentry *dentry,
865 struct pathComponent *pc;
866 const char *compstart;
867 struct extent_position epos = {};
868 int eoffset, elen = 0;
872 unsigned char *name = NULL;
874 struct udf_inode_info *iinfo;
875 struct super_block *sb = dir->i_sb;
877 inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err);
881 iinfo = UDF_I(inode);
882 down_write(&iinfo->i_data_sem);
883 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
889 inode->i_data.a_ops = &udf_symlink_aops;
890 inode->i_op = &udf_symlink_inode_operations;
892 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
893 struct kernel_lb_addr eloc;
896 block = udf_new_block(sb, inode,
897 iinfo->i_location.partitionReferenceNum,
898 iinfo->i_location.logicalBlockNum, &err);
901 epos.block = iinfo->i_location;
902 epos.offset = udf_file_entry_alloc_offset(inode);
904 eloc.logicalBlockNum = block;
905 eloc.partitionReferenceNum =
906 iinfo->i_location.partitionReferenceNum;
907 bsize = sb->s_blocksize;
908 iinfo->i_lenExtents = bsize;
909 udf_add_aext(inode, &epos, &eloc, bsize, 0);
912 block = udf_get_pblock(sb, block,
913 iinfo->i_location.partitionReferenceNum,
915 epos.bh = udf_tgetblk(sb, block);
916 lock_buffer(epos.bh);
917 memset(epos.bh->b_data, 0x00, bsize);
918 set_buffer_uptodate(epos.bh);
919 unlock_buffer(epos.bh);
920 mark_buffer_dirty_inode(epos.bh, inode);
921 ea = epos.bh->b_data + udf_ext0_offset(inode);
923 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
925 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
926 pc = (struct pathComponent *)ea;
928 if (*symname == '/') {
931 } while (*symname == '/');
933 pc->componentType = 1;
934 pc->lengthComponentIdent = 0;
935 pc->componentFileVersionNum = 0;
936 elen += sizeof(struct pathComponent);
942 if (elen + sizeof(struct pathComponent) > eoffset)
945 pc = (struct pathComponent *)(ea + elen);
951 } while (*symname && *symname != '/');
953 pc->componentType = 5;
954 pc->lengthComponentIdent = 0;
955 pc->componentFileVersionNum = 0;
956 if (compstart[0] == '.') {
957 if ((symname - compstart) == 1)
958 pc->componentType = 4;
959 else if ((symname - compstart) == 2 &&
961 pc->componentType = 3;
964 if (pc->componentType == 5) {
965 namelen = udf_put_filename(sb, compstart, name,
966 symname - compstart);
970 if (elen + sizeof(struct pathComponent) + namelen >
974 pc->lengthComponentIdent = namelen;
976 memcpy(pc->componentIdent, name, namelen);
979 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
984 } while (*symname == '/');
989 inode->i_size = elen;
990 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
991 iinfo->i_lenAlloc = inode->i_size;
993 udf_truncate_tail_extent(inode);
994 mark_inode_dirty(inode);
995 up_write(&iinfo->i_data_sem);
997 err = udf_add_nondir(dentry, inode);
1003 up_write(&iinfo->i_data_sem);
1004 inode_dec_link_count(inode);
1005 unlock_new_inode(inode);
1010 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1011 struct dentry *dentry)
1013 struct inode *inode = old_dentry->d_inode;
1014 struct udf_fileident_bh fibh;
1015 struct fileIdentDesc cfi, *fi;
1018 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1022 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1023 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1024 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
1025 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1026 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
1028 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1029 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1030 mark_inode_dirty(dir);
1032 if (fibh.sbh != fibh.ebh)
1036 inode->i_ctime = current_fs_time(inode->i_sb);
1037 mark_inode_dirty(inode);
1039 d_instantiate(dentry, inode);
1044 /* Anybody can rename anything with this: the permission checks are left to the
1045 * higher-level routines.
1047 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1048 struct inode *new_dir, struct dentry *new_dentry)
1050 struct inode *old_inode = old_dentry->d_inode;
1051 struct inode *new_inode = new_dentry->d_inode;
1052 struct udf_fileident_bh ofibh, nfibh;
1053 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1054 struct fileIdentDesc ocfi, ncfi;
1055 struct buffer_head *dir_bh = NULL;
1056 int retval = -ENOENT;
1057 struct kernel_lb_addr tloc;
1058 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1060 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1062 if (ofibh.sbh != ofibh.ebh)
1066 tloc = lelb_to_cpu(ocfi.icb.extLocation);
1067 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
1068 != old_inode->i_ino)
1071 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
1074 if (nfibh.sbh != nfibh.ebh)
1080 if (S_ISDIR(old_inode->i_mode)) {
1081 int offset = udf_ext0_offset(old_inode);
1084 retval = -ENOTEMPTY;
1085 if (!empty_dir(new_inode))
1089 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1090 dir_fi = udf_get_fileident(
1091 old_iinfo->i_ext.i_data -
1093 sizeof(struct extendedFileEntry) :
1094 sizeof(struct fileEntry)),
1095 old_inode->i_sb->s_blocksize, &offset);
1097 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1100 dir_fi = udf_get_fileident(dir_bh->b_data,
1101 old_inode->i_sb->s_blocksize, &offset);
1105 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1106 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
1111 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1118 * Like most other Unix systems, set the ctime for inodes on a
1121 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1122 mark_inode_dirty(old_inode);
1127 ncfi.fileVersionNum = ocfi.fileVersionNum;
1128 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1129 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
1130 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1132 /* The old fid may have moved - find it again */
1133 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
1134 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1137 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1138 inode_dec_link_count(new_inode);
1140 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1141 mark_inode_dirty(old_dir);
1144 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1145 udf_update_tag((char *)dir_fi,
1146 (sizeof(struct fileIdentDesc) +
1147 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1148 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1149 mark_inode_dirty(old_inode);
1151 mark_buffer_dirty_inode(dir_bh, old_inode);
1153 inode_dec_link_count(old_dir);
1155 inode_dec_link_count(new_inode);
1158 mark_inode_dirty(new_dir);
1163 if (ofibh.sbh != ofibh.ebh)
1173 if (nfibh.sbh != nfibh.ebh)
1181 static struct dentry *udf_get_parent(struct dentry *child)
1183 struct kernel_lb_addr tloc;
1184 struct inode *inode = NULL;
1185 struct qstr dotdot = QSTR_INIT("..", 2);
1186 struct fileIdentDesc cfi;
1187 struct udf_fileident_bh fibh;
1189 if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
1190 return ERR_PTR(-EACCES);
1192 if (fibh.sbh != fibh.ebh)
1196 tloc = lelb_to_cpu(cfi.icb.extLocation);
1197 inode = udf_iget(child->d_inode->i_sb, &tloc);
1199 return ERR_CAST(inode);
1201 return d_obtain_alias(inode);
1205 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1206 u16 partref, __u32 generation)
1208 struct inode *inode;
1209 struct kernel_lb_addr loc;
1212 return ERR_PTR(-ESTALE);
1214 loc.logicalBlockNum = block;
1215 loc.partitionReferenceNum = partref;
1216 inode = udf_iget(sb, &loc);
1219 return ERR_CAST(inode);
1221 if (generation && inode->i_generation != generation) {
1223 return ERR_PTR(-ESTALE);
1225 return d_obtain_alias(inode);
1228 static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1229 struct fid *fid, int fh_len, int fh_type)
1231 if ((fh_len != 3 && fh_len != 5) ||
1232 (fh_type != FILEID_UDF_WITH_PARENT &&
1233 fh_type != FILEID_UDF_WITHOUT_PARENT))
1236 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1237 fid->udf.generation);
1240 static struct dentry *udf_fh_to_parent(struct super_block *sb,
1241 struct fid *fid, int fh_len, int fh_type)
1243 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
1246 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1247 fid->udf.parent_partref,
1248 fid->udf.parent_generation);
1250 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1251 struct inode *parent)
1254 struct kernel_lb_addr location = UDF_I(inode)->i_location;
1255 struct fid *fid = (struct fid *)fh;
1256 int type = FILEID_UDF_WITHOUT_PARENT;
1258 if (parent && (len < 5)) {
1260 return FILEID_INVALID;
1261 } else if (len < 3) {
1263 return FILEID_INVALID;
1267 fid->udf.block = location.logicalBlockNum;
1268 fid->udf.partref = location.partitionReferenceNum;
1269 fid->udf.parent_partref = 0;
1270 fid->udf.generation = inode->i_generation;
1273 location = UDF_I(parent)->i_location;
1274 fid->udf.parent_block = location.logicalBlockNum;
1275 fid->udf.parent_partref = location.partitionReferenceNum;
1276 fid->udf.parent_generation = inode->i_generation;
1278 type = FILEID_UDF_WITH_PARENT;
1284 const struct export_operations udf_export_ops = {
1285 .encode_fh = udf_encode_fh,
1286 .fh_to_dentry = udf_fh_to_dentry,
1287 .fh_to_parent = udf_fh_to_parent,
1288 .get_parent = udf_get_parent,
1291 const struct inode_operations udf_dir_inode_operations = {
1292 .lookup = udf_lookup,
1293 .create = udf_create,
1295 .unlink = udf_unlink,
1296 .symlink = udf_symlink,
1300 .rename = udf_rename,
1301 .tmpfile = udf_tmpfile,
1303 const struct inode_operations udf_symlink_inode_operations = {
1304 .readlink = generic_readlink,
1305 .follow_link = page_follow_link_light,
1306 .put_link = page_put_link,