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   1 /*
   2  * namei.c
   3  *
   4  * PURPOSE
   5  *      Inode name handling routines for the OSTA-UDF(tm) filesystem.
   6  *
   7  * COPYRIGHT
   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.
  12  *
  13  *  (C) 1998-2004 Ben Fennema
  14  *  (C) 1999-2000 Stelias Computing Inc
  15  *
  16  * HISTORY
  17  *
  18  *  12/12/98 blf  Created. Split out the lookup code from dir.c
  19  *  04/19/99 blf  link, mknod, symlink support
  20  */
  21
  22 #include "udfdecl.h"
  23
  24 #include "udf_i.h"
  25 #include "udf_sb.h"
  26 #include <linux/string.h>
  27 #include <linux/errno.h>
  28 #include <linux/mm.h>
  29 #include <linux/slab.h>
  30 #include <linux/quotaops.h>
  31 #include <linux/smp_lock.h>
  32 #include <linux/buffer_head.h>
  33 #include <linux/sched.h>
  34
  35 static inline int udf_match(int len1, const char *name1, int len2,
  36                             const char *name2)
  37 {
  38         if (len1 != len2)
  39                 return 0;
  40
  41         return !memcmp(name1, name2, len1);
  42 }
  43
  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)
  47 {
  48         uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
  49         uint16_t crc;
  50         int offset;
  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);
  55         int adinicb = 0;
  56
  57         if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
  58                 adinicb = 1;
  59
  60         offset = fibh->soffset + sizeof(struct fileIdentDesc);
  61
  62         if (impuse) {
  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);
  67                 } else {
  68                         memcpy((uint8_t *)sfi->impUse, impuse, -offset);
  69                         memcpy(fibh->ebh->b_data, impuse - offset,
  70                                 liu + offset);
  71                 }
  72         }
  73
  74         offset += liu;
  75
  76         if (fileident) {
  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);
  81                 } else {
  82                         memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
  83                                 -offset);
  84                         memcpy(fibh->ebh->b_data, fileident - offset,
  85                                 lfi + offset);
  86                 }
  87         }
  88
  89         offset += lfi;
  90
  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);
  95         } else {
  96                 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
  97                 memset(fibh->ebh->b_data, 0x00, padlen + offset);
  98         }
  99
 100         crc = udf_crc((uint8_t *)cfi + sizeof(tag),
 101                       sizeof(struct fileIdentDesc) - sizeof(tag), 0);
 102
 103         if (fibh->sbh == fibh->ebh) {
 104                 crc = udf_crc((uint8_t *)sfi->impUse,
 105                               crclen + sizeof(tag) -
 106                               sizeof(struct fileIdentDesc), crc);
 107         } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
 108                 crc = udf_crc(fibh->ebh->b_data +
 109                                         sizeof(struct fileIdentDesc) +
 110                                         fibh->soffset,
 111                               crclen + sizeof(tag) -
 112                                         sizeof(struct fileIdentDesc),
 113                               crc);
 114         } else {
 115                 crc = udf_crc((uint8_t *)sfi->impUse,
 116                               -fibh->soffset - sizeof(struct fileIdentDesc),
 117                               crc);
 118                 crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
 119         }
 120
 121         cfi->descTag.descCRC = cpu_to_le16(crc);
 122         cfi->descTag.descCRCLength = cpu_to_le16(crclen);
 123         cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
 124
 125         if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
 126                 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
 127                         sizeof(struct fileIdentDesc));
 128         } else {
 129                 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
 130                 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
 131                        sizeof(struct fileIdentDesc) + fibh->soffset);
 132         }
 133
 134         if (adinicb) {
 135                 mark_inode_dirty(inode);
 136         } else {
 137                 if (fibh->sbh != fibh->ebh)
 138                         mark_buffer_dirty_inode(fibh->ebh, inode);
 139                 mark_buffer_dirty_inode(fibh->sbh, inode);
 140         }
 141         return 0;
 142 }
 143
 144 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
 145                                             struct dentry *dentry,
 146                                             struct udf_fileident_bh *fibh,
 147                                             struct fileIdentDesc *cfi)
 148 {
 149         struct fileIdentDesc *fi = NULL;
 150         loff_t f_pos;
 151         int block, flen;
 152         char fname[UDF_NAME_LEN];
 153         char *nameptr;
 154         uint8_t lfi;
 155         uint16_t liu;
 156         loff_t size;
 157         kernel_lb_addr eloc;
 158         uint32_t elen;
 159         sector_t offset;
 160         struct extent_position epos = {};
 161         struct udf_inode_info *dinfo = UDF_I(dir);
 162
 163         size = udf_ext0_offset(dir) + dir->i_size;
 164         f_pos = udf_ext0_offset(dir);
 165
 166         fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
 167         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 168                 fibh->sbh = fibh->ebh = NULL;
 169         else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
 170                               &epos, &eloc, &elen, &offset) ==
 171                                         (EXT_RECORDED_ALLOCATED >> 30)) {
 172                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 173                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 174                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 175                                 epos.offset -= sizeof(short_ad);
 176                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 177                                 epos.offset -= sizeof(long_ad);
 178                 } else
 179                         offset = 0;
 180
 181                 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
 182                 if (!fibh->sbh) {
 183                         brelse(epos.bh);
 184                         return NULL;
 185                 }
 186         } else {
 187                 brelse(epos.bh);
 188                 return NULL;
 189         }
 190
 191         while (f_pos < size) {
 192                 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
 193                                         &elen, &offset);
 194                 if (!fi) {
 195                         if (fibh->sbh != fibh->ebh)
 196                                 brelse(fibh->ebh);
 197                         brelse(fibh->sbh);
 198                         brelse(epos.bh);
 199                         return NULL;
 200                 }
 201
 202                 liu = le16_to_cpu(cfi->lengthOfImpUse);
 203                 lfi = cfi->lengthFileIdent;
 204
 205                 if (fibh->sbh == fibh->ebh) {
 206                         nameptr = fi->fileIdent + liu;
 207                 } else {
 208                         int poffset;    /* Unpaded ending offset */
 209
 210                         poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
 211                                         liu + lfi;
 212
 213                         if (poffset >= lfi)
 214                                 nameptr = (uint8_t *)(fibh->ebh->b_data +
 215                                                       poffset - lfi);
 216                         else {
 217                                 nameptr = fname;
 218                                 memcpy(nameptr, fi->fileIdent + liu,
 219                                         lfi - poffset);
 220                                 memcpy(nameptr + lfi - poffset,
 221                                         fibh->ebh->b_data, poffset);
 222                         }
 223                 }
 224
 225                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
 226                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
 227                                 continue;
 228                 }
 229
 230                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
 231                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
 232                                 continue;
 233                 }
 234
 235                 if (!lfi)
 236                         continue;
 237
 238                 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
 239                 if (flen && udf_match(flen, fname, dentry->d_name.len,
 240                                       dentry->d_name.name)) {
 241                         brelse(epos.bh);
 242                         return fi;
 243                 }
 244         }
 245
 246         if (fibh->sbh != fibh->ebh)
 247                 brelse(fibh->ebh);
 248         brelse(fibh->sbh);
 249         brelse(epos.bh);
 250
 251         return NULL;
 252 }
 253
 254 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
 255                                  struct nameidata *nd)
 256 {
 257         struct inode *inode = NULL;
 258         struct fileIdentDesc cfi;
 259         struct udf_fileident_bh fibh;
 260
 261         if (dentry->d_name.len > UDF_NAME_LEN - 2)
 262                 return ERR_PTR(-ENAMETOOLONG);
 263
 264         lock_kernel();
 265 #ifdef UDF_RECOVERY
 266         /* temporary shorthand for specifying files by inode number */
 267         if (!strncmp(dentry->d_name.name, ".B=", 3)) {
 268                 kernel_lb_addr lb = {
 269                         .logicalBlockNum = 0,
 270                         .partitionReferenceNum =
 271                                 simple_strtoul(dentry->d_name.name + 3,
 272                                                 NULL, 0),
 273                 };
 274                 inode = udf_iget(dir->i_sb, lb);
 275                 if (!inode) {
 276                         unlock_kernel();
 277                         return ERR_PTR(-EACCES);
 278                 }
 279         } else
 280 #endif /* UDF_RECOVERY */
 281
 282         if (udf_find_entry(dir, dentry, &fibh, &cfi)) {
 283                 if (fibh.sbh != fibh.ebh)
 284                         brelse(fibh.ebh);
 285                 brelse(fibh.sbh);
 286
 287                 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
 288                 if (!inode) {
 289                         unlock_kernel();
 290                         return ERR_PTR(-EACCES);
 291                 }
 292         }
 293         unlock_kernel();
 294         d_add(dentry, inode);
 295
 296         return NULL;
 297 }
 298
 299 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 300                                            struct dentry *dentry,
 301                                            struct udf_fileident_bh *fibh,
 302                                            struct fileIdentDesc *cfi, int *err)
 303 {
 304         struct super_block *sb = dir->i_sb;
 305         struct fileIdentDesc *fi = NULL;
 306         char name[UDF_NAME_LEN];
 307         int namelen;
 308         loff_t f_pos;
 309         loff_t size = udf_ext0_offset(dir) + dir->i_size;
 310         int nfidlen;
 311         uint8_t lfi;
 312         uint16_t liu;
 313         int block;
 314         kernel_lb_addr eloc;
 315         uint32_t elen;
 316         sector_t offset;
 317         struct extent_position epos = {};
 318         struct udf_inode_info *dinfo;
 319
 320         if (dentry) {
 321                 if (!dentry->d_name.len) {
 322                         *err = -EINVAL;
 323                         return NULL;
 324                 }
 325                 namelen = udf_put_filename(sb, dentry->d_name.name, name,
 326                                                  dentry->d_name.len);
 327                 if (!namelen) {
 328                         *err = -ENAMETOOLONG;
 329                         return NULL;
 330                 }
 331         } else {
 332                 namelen = 0;
 333         }
 334
 335         nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
 336
 337         f_pos = udf_ext0_offset(dir);
 338
 339         fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
 340         dinfo = UDF_I(dir);
 341         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 342                 fibh->sbh = fibh->ebh = NULL;
 343         else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
 344                               &epos, &eloc, &elen, &offset) ==
 345                                         (EXT_RECORDED_ALLOCATED >> 30)) {
 346                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 347                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 348                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 349                                 epos.offset -= sizeof(short_ad);
 350                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 351                                 epos.offset -= sizeof(long_ad);
 352                 } else
 353                         offset = 0;
 354
 355                 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
 356                 if (!fibh->sbh) {
 357                         brelse(epos.bh);
 358                         *err = -EIO;
 359                         return NULL;
 360                 }
 361
 362                 block = dinfo->i_location.logicalBlockNum;
 363         } else {
 364                 block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0);
 365                 fibh->sbh = fibh->ebh = NULL;
 366                 fibh->soffset = fibh->eoffset = sb->s_blocksize;
 367                 goto add;
 368         }
 369
 370         while (f_pos < size) {
 371                 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
 372                                         &elen, &offset);
 373
 374                 if (!fi) {
 375                         if (fibh->sbh != fibh->ebh)
 376                                 brelse(fibh->ebh);
 377                         brelse(fibh->sbh);
 378                         brelse(epos.bh);
 379                         *err = -EIO;
 380                         return NULL;
 381                 }
 382
 383                 liu = le16_to_cpu(cfi->lengthOfImpUse);
 384                 lfi = cfi->lengthFileIdent;
 385
 386                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
 387                         if (((sizeof(struct fileIdentDesc) +
 388                                         liu + lfi + 3) & ~3) == nfidlen) {
 389                                 brelse(epos.bh);
 390                                 cfi->descTag.tagSerialNum = cpu_to_le16(1);
 391                                 cfi->fileVersionNum = cpu_to_le16(1);
 392                                 cfi->fileCharacteristics = 0;
 393                                 cfi->lengthFileIdent = namelen;
 394                                 cfi->lengthOfImpUse = cpu_to_le16(0);
 395                                 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
 396                                                   name))
 397                                         return fi;
 398                                 else {
 399                                         *err = -EIO;
 400                                         return NULL;
 401                                 }
 402                         }
 403                 }
 404         }
 405
 406 add:
 407         if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 408                 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
 409                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 410                         epos.offset -= sizeof(short_ad);
 411                 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 412                         epos.offset -= sizeof(long_ad);
 413                 udf_write_aext(dir, &epos, eloc, elen, 1);
 414         }
 415         f_pos += nfidlen;
 416
 417         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
 418             sb->s_blocksize - fibh->eoffset < nfidlen) {
 419                 brelse(epos.bh);
 420                 epos.bh = NULL;
 421                 fibh->soffset -= udf_ext0_offset(dir);
 422                 fibh->eoffset -= udf_ext0_offset(dir);
 423                 f_pos -= udf_ext0_offset(dir);
 424                 if (fibh->sbh != fibh->ebh)
 425                         brelse(fibh->ebh);
 426                 brelse(fibh->sbh);
 427                 fibh->sbh = fibh->ebh =
 428                                 udf_expand_dir_adinicb(dir, &block, err);
 429                 if (!fibh->sbh)
 430                         return NULL;
 431                 epos.block = dinfo->i_location;
 432                 epos.offset = udf_file_entry_alloc_offset(dir);
 433                 /* Load extent udf_expand_dir_adinicb() has created */
 434                 udf_current_aext(dir, &epos, &eloc, &elen, 1);
 435         }
 436
 437         if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
 438                 fibh->soffset = fibh->eoffset;
 439                 fibh->eoffset += nfidlen;
 440                 if (fibh->sbh != fibh->ebh) {
 441                         brelse(fibh->sbh);
 442                         fibh->sbh = fibh->ebh;
 443                 }
 444
 445                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
 446                         block = dinfo->i_location.logicalBlockNum;
 447                         fi = (struct fileIdentDesc *)
 448                                         (dinfo->i_ext.i_data +
 449                                          fibh->soffset -
 450                                          udf_ext0_offset(dir) +
 451                                          dinfo->i_lenEAttr);
 452                 } else {
 453                         block = eloc.logicalBlockNum +
 454                                         ((elen - 1) >>
 455                                                 dir->i_sb->s_blocksize_bits);
 456                         fi = (struct fileIdentDesc *)
 457                                 (fibh->sbh->b_data + fibh->soffset);
 458                 }
 459         } else {
 460                 fibh->soffset = fibh->eoffset - sb->s_blocksize;
 461                 fibh->eoffset += nfidlen - sb->s_blocksize;
 462                 if (fibh->sbh != fibh->ebh) {
 463                         brelse(fibh->sbh);
 464                         fibh->sbh = fibh->ebh;
 465                 }
 466
 467                 block = eloc.logicalBlockNum + ((elen - 1) >>
 468                                                 dir->i_sb->s_blocksize_bits);
 469                 fibh->ebh = udf_bread(dir,
 470                                 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
 471                 if (!fibh->ebh) {
 472                         brelse(epos.bh);
 473                         brelse(fibh->sbh);
 474                         return NULL;
 475                 }
 476
 477                 if (!fibh->soffset) {
 478                         if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
 479                             (EXT_RECORDED_ALLOCATED >> 30)) {
 480                                 block = eloc.logicalBlockNum + ((elen - 1) >>
 481                                         dir->i_sb->s_blocksize_bits);
 482                         } else
 483                                 block++;
 484
 485                         brelse(fibh->sbh);
 486                         fibh->sbh = fibh->ebh;
 487                         fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
 488                 } else {
 489                         fi = (struct fileIdentDesc *)
 490                                 (fibh->sbh->b_data + sb->s_blocksize +
 491                                         fibh->soffset);
 492                 }
 493         }
 494
 495         memset(cfi, 0, sizeof(struct fileIdentDesc));
 496         if (UDF_SB(sb)->s_udfrev >= 0x0200)
 497                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
 498                             sizeof(tag));
 499         else
 500                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
 501                             sizeof(tag));
 502         cfi->fileVersionNum = cpu_to_le16(1);
 503         cfi->lengthFileIdent = namelen;
 504         cfi->lengthOfImpUse = cpu_to_le16(0);
 505         if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
 506                 brelse(epos.bh);
 507                 dir->i_size += nfidlen;
 508                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 509                         dinfo->i_lenAlloc += nfidlen;
 510                 mark_inode_dirty(dir);
 511                 return fi;
 512         } else {
 513                 brelse(epos.bh);
 514                 if (fibh->sbh != fibh->ebh)
 515                         brelse(fibh->ebh);
 516                 brelse(fibh->sbh);
 517                 *err = -EIO;
 518                 return NULL;
 519         }
 520 }
 521
 522 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
 523                             struct udf_fileident_bh *fibh,
 524                             struct fileIdentDesc *cfi)
 525 {
 526         cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
 527
 528         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
 529                 memset(&(cfi->icb), 0x00, sizeof(long_ad));
 530
 531         return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
 532 }
 533
 534 static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
 535                       struct nameidata *nd)
 536 {
 537         struct udf_fileident_bh fibh;
 538         struct inode *inode;
 539         struct fileIdentDesc cfi, *fi;
 540         int err;
 541         struct udf_inode_info *iinfo;
 542
 543         lock_kernel();
 544         inode = udf_new_inode(dir, mode, &err);
 545         if (!inode) {
 546                 unlock_kernel();
 547                 return err;
 548         }
 549
 550         iinfo = UDF_I(inode);
 551         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 552                 inode->i_data.a_ops = &udf_adinicb_aops;
 553         else
 554                 inode->i_data.a_ops = &udf_aops;
 555         inode->i_op = &udf_file_inode_operations;
 556         inode->i_fop = &udf_file_operations;
 557         inode->i_mode = mode;
 558         mark_inode_dirty(inode);
 559
 560         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 561         if (!fi) {
 562                 inode->i_nlink--;
 563                 mark_inode_dirty(inode);
 564                 iput(inode);
 565                 unlock_kernel();
 566                 return err;
 567         }
 568         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 569         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 570         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 571                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 572         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 573         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 574                 mark_inode_dirty(dir);
 575         if (fibh.sbh != fibh.ebh)
 576                 brelse(fibh.ebh);
 577         brelse(fibh.sbh);
 578         unlock_kernel();
 579         d_instantiate(dentry, inode);
 580
 581         return 0;
 582 }
 583
 584 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
 585                      dev_t rdev)
 586 {
 587         struct inode *inode;
 588         struct udf_fileident_bh fibh;
 589         struct fileIdentDesc cfi, *fi;
 590         int err;
 591         struct udf_inode_info *iinfo;
 592
 593         if (!old_valid_dev(rdev))
 594                 return -EINVAL;
 595
 596         lock_kernel();
 597         err = -EIO;
 598         inode = udf_new_inode(dir, mode, &err);
 599         if (!inode)
 600                 goto out;
 601
 602         iinfo = UDF_I(inode);
 603         inode->i_uid = current->fsuid;
 604         init_special_inode(inode, mode, rdev);
 605         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 606         if (!fi) {
 607                 inode->i_nlink--;
 608                 mark_inode_dirty(inode);
 609                 iput(inode);
 610                 unlock_kernel();
 611                 return err;
 612         }
 613         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 614         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 615         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 616                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 617         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 618         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 619                 mark_inode_dirty(dir);
 620         mark_inode_dirty(inode);
 621
 622         if (fibh.sbh != fibh.ebh)
 623                 brelse(fibh.ebh);
 624         brelse(fibh.sbh);
 625         d_instantiate(dentry, inode);
 626         err = 0;
 627
 628 out:
 629         unlock_kernel();
 630         return err;
 631 }
 632
 633 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 634 {
 635         struct inode *inode;
 636         struct udf_fileident_bh fibh;
 637         struct fileIdentDesc cfi, *fi;
 638         int err;
 639         struct udf_inode_info *dinfo = UDF_I(dir);
 640         struct udf_inode_info *iinfo;
 641
 642         lock_kernel();
 643         err = -EMLINK;
 644         if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
 645                 goto out;
 646
 647         err = -EIO;
 648         inode = udf_new_inode(dir, S_IFDIR, &err);
 649         if (!inode)
 650                 goto out;
 651
 652         iinfo = UDF_I(inode);
 653         inode->i_op = &udf_dir_inode_operations;
 654         inode->i_fop = &udf_dir_operations;
 655         fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
 656         if (!fi) {
 657                 inode->i_nlink--;
 658                 mark_inode_dirty(inode);
 659                 iput(inode);
 660                 goto out;
 661         }
 662         inode->i_nlink = 2;
 663         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 664         cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
 665         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 666                 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
 667         cfi.fileCharacteristics =
 668                         FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
 669         udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
 670         brelse(fibh.sbh);
 671         inode->i_mode = S_IFDIR | mode;
 672         if (dir->i_mode & S_ISGID)
 673                 inode->i_mode |= S_ISGID;
 674         mark_inode_dirty(inode);
 675
 676         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 677         if (!fi) {
 678                 inode->i_nlink = 0;
 679                 mark_inode_dirty(inode);
 680                 iput(inode);
 681                 goto out;
 682         }
 683         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 684         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 685         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 686                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 687         cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
 688         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 689         inc_nlink(dir);
 690         mark_inode_dirty(dir);
 691         d_instantiate(dentry, inode);
 692         if (fibh.sbh != fibh.ebh)
 693                 brelse(fibh.ebh);
 694         brelse(fibh.sbh);
 695         err = 0;
 696
 697 out:
 698         unlock_kernel();
 699         return err;
 700 }
 701
 702 static int empty_dir(struct inode *dir)
 703 {
 704         struct fileIdentDesc *fi, cfi;
 705         struct udf_fileident_bh fibh;
 706         loff_t f_pos;
 707         loff_t size = udf_ext0_offset(dir) + dir->i_size;
 708         int block;
 709         kernel_lb_addr eloc;
 710         uint32_t elen;
 711         sector_t offset;
 712         struct extent_position epos = {};
 713         struct udf_inode_info *dinfo = UDF_I(dir);
 714
 715         f_pos = udf_ext0_offset(dir);
 716         fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
 717
 718         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 719                 fibh.sbh = fibh.ebh = NULL;
 720         else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
 721                               &epos, &eloc, &elen, &offset) ==
 722                                         (EXT_RECORDED_ALLOCATED >> 30)) {
 723                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 724                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 725                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 726                                 epos.offset -= sizeof(short_ad);
 727                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 728                                 epos.offset -= sizeof(long_ad);
 729                 } else
 730                         offset = 0;
 731
 732                 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
 733                 if (!fibh.sbh) {
 734                         brelse(epos.bh);
 735                         return 0;
 736                 }
 737         } else {
 738                 brelse(epos.bh);
 739                 return 0;
 740         }
 741
 742         while (f_pos < size) {
 743                 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
 744                                         &elen, &offset);
 745                 if (!fi) {
 746                         if (fibh.sbh != fibh.ebh)
 747                                 brelse(fibh.ebh);
 748                         brelse(fibh.sbh);
 749                         brelse(epos.bh);
 750                         return 0;
 751                 }
 752
 753                 if (cfi.lengthFileIdent &&
 754                     (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
 755                         if (fibh.sbh != fibh.ebh)
 756                                 brelse(fibh.ebh);
 757                         brelse(fibh.sbh);
 758                         brelse(epos.bh);
 759                         return 0;
 760                 }
 761         }
 762
 763         if (fibh.sbh != fibh.ebh)
 764                 brelse(fibh.ebh);
 765         brelse(fibh.sbh);
 766         brelse(epos.bh);
 767
 768         return 1;
 769 }
 770
 771 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
 772 {
 773         int retval;
 774         struct inode *inode = dentry->d_inode;
 775         struct udf_fileident_bh fibh;
 776         struct fileIdentDesc *fi, cfi;
 777         kernel_lb_addr tloc;
 778
 779         retval = -ENOENT;
 780         lock_kernel();
 781         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
 782         if (!fi)
 783                 goto out;
 784
 785         retval = -EIO;
 786         tloc = lelb_to_cpu(cfi.icb.extLocation);
 787         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
 788                 goto end_rmdir;
 789         retval = -ENOTEMPTY;
 790         if (!empty_dir(inode))
 791                 goto end_rmdir;
 792         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
 793         if (retval)
 794                 goto end_rmdir;
 795         if (inode->i_nlink != 2)
 796                 udf_warning(inode->i_sb, "udf_rmdir",
 797                             "empty directory has nlink != 2 (%d)",
 798                             inode->i_nlink);
 799         clear_nlink(inode);
 800         inode->i_size = 0;
 801         inode_dec_link_count(dir);
 802         inode->i_ctime = dir->i_ctime = dir->i_mtime =
 803                                                 current_fs_time(dir->i_sb);
 804         mark_inode_dirty(dir);
 805
 806 end_rmdir:
 807         if (fibh.sbh != fibh.ebh)
 808                 brelse(fibh.ebh);
 809         brelse(fibh.sbh);
 810
 811 out:
 812         unlock_kernel();
 813         return retval;
 814 }
 815
 816 static int udf_unlink(struct inode *dir, struct dentry *dentry)
 817 {
 818         int retval;
 819         struct inode *inode = dentry->d_inode;
 820         struct udf_fileident_bh fibh;
 821         struct fileIdentDesc *fi;
 822         struct fileIdentDesc cfi;
 823         kernel_lb_addr tloc;
 824
 825         retval = -ENOENT;
 826         lock_kernel();
 827         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
 828         if (!fi)
 829                 goto out;
 830
 831         retval = -EIO;
 832         tloc = lelb_to_cpu(cfi.icb.extLocation);
 833         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
 834                 goto end_unlink;
 835
 836         if (!inode->i_nlink) {
 837                 udf_debug("Deleting nonexistent file (%lu), %d\n",
 838                           inode->i_ino, inode->i_nlink);
 839                 inode->i_nlink = 1;
 840         }
 841         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
 842         if (retval)
 843                 goto end_unlink;
 844         dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
 845         mark_inode_dirty(dir);
 846         inode_dec_link_count(inode);
 847         inode->i_ctime = dir->i_ctime;
 848         retval = 0;
 849
 850 end_unlink:
 851         if (fibh.sbh != fibh.ebh)
 852                 brelse(fibh.ebh);
 853         brelse(fibh.sbh);
 854
 855 out:
 856         unlock_kernel();
 857         return retval;
 858 }
 859
 860 static int udf_symlink(struct inode *dir, struct dentry *dentry,
 861                        const char *symname)
 862 {
 863         struct inode *inode;
 864         struct pathComponent *pc;
 865         char *compstart;
 866         struct udf_fileident_bh fibh;
 867         struct extent_position epos = {};
 868         int eoffset, elen = 0;
 869         struct fileIdentDesc *fi;
 870         struct fileIdentDesc cfi;
 871         char *ea;
 872         int err;
 873         int block;
 874         char name[UDF_NAME_LEN];
 875         int namelen;
 876         struct buffer_head *bh;
 877         struct udf_inode_info *iinfo;
 878
 879         lock_kernel();
 880         inode = udf_new_inode(dir, S_IFLNK, &err);
 881         if (!inode)
 882                 goto out;
 883
 884         iinfo = UDF_I(inode);
 885         inode->i_mode = S_IFLNK | S_IRWXUGO;
 886         inode->i_data.a_ops = &udf_symlink_aops;
 887         inode->i_op = &page_symlink_inode_operations;
 888
 889         if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 890                 kernel_lb_addr eloc;
 891                 uint32_t elen;
 892
 893                 block = udf_new_block(inode->i_sb, inode,
 894                                 iinfo->i_location.partitionReferenceNum,
 895                                 iinfo->i_location.logicalBlockNum, &err);
 896                 if (!block)
 897                         goto out_no_entry;
 898                 epos.block = iinfo->i_location;
 899                 epos.offset = udf_file_entry_alloc_offset(inode);
 900                 epos.bh = NULL;
 901                 eloc.logicalBlockNum = block;
 902                 eloc.partitionReferenceNum =
 903                                 iinfo->i_location.partitionReferenceNum;
 904                 elen = inode->i_sb->s_blocksize;
 905                 iinfo->i_lenExtents = elen;
 906                 udf_add_aext(inode, &epos, eloc, elen, 0);
 907                 brelse(epos.bh);
 908
 909                 block = udf_get_pblock(inode->i_sb, block,
 910                                 iinfo->i_location.partitionReferenceNum,
 911                                 0);
 912                 epos.bh = udf_tread(inode->i_sb, block);
 913                 lock_buffer(epos.bh);
 914                 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
 915                 set_buffer_uptodate(epos.bh);
 916                 unlock_buffer(epos.bh);
 917                 mark_buffer_dirty_inode(epos.bh, inode);
 918                 ea = epos.bh->b_data + udf_ext0_offset(inode);
 919         } else
 920                 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
 921
 922         eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
 923         pc = (struct pathComponent *)ea;
 924
 925         if (*symname == '/') {
 926                 do {
 927                         symname++;
 928                 } while (*symname == '/');
 929
 930                 pc->componentType = 1;
 931                 pc->lengthComponentIdent = 0;
 932                 pc->componentFileVersionNum = 0;
 933                 pc += sizeof(struct pathComponent);
 934                 elen += sizeof(struct pathComponent);
 935         }
 936
 937         err = -ENAMETOOLONG;
 938
 939         while (*symname) {
 940                 if (elen + sizeof(struct pathComponent) > eoffset)
 941                         goto out_no_entry;
 942
 943                 pc = (struct pathComponent *)(ea + elen);
 944
 945                 compstart = (char *)symname;
 946
 947                 do {
 948                         symname++;
 949                 } while (*symname && *symname != '/');
 950
 951                 pc->componentType = 5;
 952                 pc->lengthComponentIdent = 0;
 953                 pc->componentFileVersionNum = 0;
 954                 if (compstart[0] == '.') {
 955                         if ((symname - compstart) == 1)
 956                                 pc->componentType = 4;
 957                         else if ((symname - compstart) == 2 &&
 958                                         compstart[1] == '.')
 959                                 pc->componentType = 3;
 960                 }
 961
 962                 if (pc->componentType == 5) {
 963                         namelen = udf_put_filename(inode->i_sb, compstart, name,
 964                                                    symname - compstart);
 965                         if (!namelen)
 966                                 goto out_no_entry;
 967
 968                         if (elen + sizeof(struct pathComponent) + namelen >
 969                                         eoffset)
 970                                 goto out_no_entry;
 971                         else
 972                                 pc->lengthComponentIdent = namelen;
 973
 974                         memcpy(pc->componentIdent, name, namelen);
 975                 }
 976
 977                 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
 978
 979                 if (*symname) {
 980                         do {
 981                                 symname++;
 982                         } while (*symname == '/');
 983                 }
 984         }
 985
 986         brelse(epos.bh);
 987         inode->i_size = elen;
 988         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 989                 iinfo->i_lenAlloc = inode->i_size;
 990         mark_inode_dirty(inode);
 991
 992         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 993         if (!fi)
 994                 goto out_no_entry;
 995         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 996         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 997         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
 998         if (bh) {
 999                 struct logicalVolIntegrityDesc *lvid =
1000                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1001                 struct logicalVolHeaderDesc *lvhd;
1002                 uint64_t uniqueID;
1003                 lvhd = (struct logicalVolHeaderDesc *)
1004                                 lvid->logicalVolContentsUse;
1005                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1006                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1007                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1008                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1009                         uniqueID += 16;
1010                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1011                 mark_buffer_dirty(bh);
1012         }
1013         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1014         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1015                 mark_inode_dirty(dir);
1016         if (fibh.sbh != fibh.ebh)
1017                 brelse(fibh.ebh);
1018         brelse(fibh.sbh);
1019         d_instantiate(dentry, inode);
1020         err = 0;
1021
1022 out:
1023         unlock_kernel();
1024         return err;
1025
1026 out_no_entry:
1027         inode_dec_link_count(inode);
1028         iput(inode);
1029         goto out;
1030 }
1031
1032 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1033                     struct dentry *dentry)
1034 {
1035         struct inode *inode = old_dentry->d_inode;
1036         struct udf_fileident_bh fibh;
1037         struct fileIdentDesc cfi, *fi;
1038         int err;
1039         struct buffer_head *bh;
1040
1041         lock_kernel();
1042         if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
1043                 unlock_kernel();
1044                 return -EMLINK;
1045         }
1046
1047         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1048         if (!fi) {
1049                 unlock_kernel();
1050                 return err;
1051         }
1052         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1053         cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1054         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1055         if (bh) {
1056                 struct logicalVolIntegrityDesc *lvid =
1057                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1058                 struct logicalVolHeaderDesc *lvhd;
1059                 uint64_t uniqueID;
1060                 lvhd = (struct logicalVolHeaderDesc *)
1061                                 (lvid->logicalVolContentsUse);
1062                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1063                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1064                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1065                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1066                         uniqueID += 16;
1067                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1068                 mark_buffer_dirty(bh);
1069         }
1070         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1071         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1072                 mark_inode_dirty(dir);
1073
1074         if (fibh.sbh != fibh.ebh)
1075                 brelse(fibh.ebh);
1076         brelse(fibh.sbh);
1077         inc_nlink(inode);
1078         inode->i_ctime = current_fs_time(inode->i_sb);
1079         mark_inode_dirty(inode);
1080         atomic_inc(&inode->i_count);
1081         d_instantiate(dentry, inode);
1082         unlock_kernel();
1083
1084         return 0;
1085 }
1086
1087 /* Anybody can rename anything with this: the permission checks are left to the
1088  * higher-level routines.
1089  */
1090 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1091                       struct inode *new_dir, struct dentry *new_dentry)
1092 {
1093         struct inode *old_inode = old_dentry->d_inode;
1094         struct inode *new_inode = new_dentry->d_inode;
1095         struct udf_fileident_bh ofibh, nfibh;
1096         struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1097         struct fileIdentDesc ocfi, ncfi;
1098         struct buffer_head *dir_bh = NULL;
1099         int retval = -ENOENT;
1100         kernel_lb_addr tloc;
1101         struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1102
1103         lock_kernel();
1104         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1105         if (ofi) {
1106                 if (ofibh.sbh != ofibh.ebh)
1107                         brelse(ofibh.ebh);
1108                 brelse(ofibh.sbh);
1109         }
1110         tloc = lelb_to_cpu(ocfi.icb.extLocation);
1111         if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1112             != old_inode->i_ino)
1113                 goto end_rename;
1114
1115         nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1116         if (nfi) {
1117                 if (!new_inode) {
1118                         if (nfibh.sbh != nfibh.ebh)
1119                                 brelse(nfibh.ebh);
1120                         brelse(nfibh.sbh);
1121                         nfi = NULL;
1122                 }
1123         }
1124         if (S_ISDIR(old_inode->i_mode)) {
1125                 int offset = udf_ext0_offset(old_inode);
1126
1127                 if (new_inode) {
1128                         retval = -ENOTEMPTY;
1129                         if (!empty_dir(new_inode))
1130                                 goto end_rename;
1131                 }
1132                 retval = -EIO;
1133                 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1134                         dir_fi = udf_get_fileident(
1135                                         old_iinfo->i_ext.i_data -
1136                                           (old_iinfo->i_efe ?
1137                                            sizeof(struct extendedFileEntry) :
1138                                            sizeof(struct fileEntry)),
1139                                         old_inode->i_sb->s_blocksize, &offset);
1140                 } else {
1141                         dir_bh = udf_bread(old_inode, 0, 0, &retval);
1142                         if (!dir_bh)
1143                                 goto end_rename;
1144                         dir_fi = udf_get_fileident(dir_bh->b_data,
1145                                         old_inode->i_sb->s_blocksize, &offset);
1146                 }
1147                 if (!dir_fi)
1148                         goto end_rename;
1149                 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1150                 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) !=
1151                                 old_dir->i_ino)
1152                         goto end_rename;
1153
1154                 retval = -EMLINK;
1155                 if (!new_inode &&
1156                         new_dir->i_nlink >=
1157                                 (256 << sizeof(new_dir->i_nlink)) - 1)
1158                         goto end_rename;
1159         }
1160         if (!nfi) {
1161                 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1162                                     &retval);
1163                 if (!nfi)
1164                         goto end_rename;
1165         }
1166
1167         /*
1168          * Like most other Unix systems, set the ctime for inodes on a
1169          * rename.
1170          */
1171         old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1172         mark_inode_dirty(old_inode);
1173
1174         /*
1175          * ok, that's it
1176          */
1177         ncfi.fileVersionNum = ocfi.fileVersionNum;
1178         ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1179         memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1180         udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1181
1182         /* The old fid may have moved - find it again */
1183         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1184         udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1185
1186         if (new_inode) {
1187                 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1188                 inode_dec_link_count(new_inode);
1189         }
1190         old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1191         mark_inode_dirty(old_dir);
1192
1193         if (dir_fi) {
1194                 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1195                 udf_update_tag((char *)dir_fi,
1196                                 (sizeof(struct fileIdentDesc) +
1197                                 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1198                 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1199                         mark_inode_dirty(old_inode);
1200                 else
1201                         mark_buffer_dirty_inode(dir_bh, old_inode);
1202
1203                 inode_dec_link_count(old_dir);
1204                 if (new_inode)
1205                         inode_dec_link_count(new_inode);
1206                 else {
1207                         inc_nlink(new_dir);
1208                         mark_inode_dirty(new_dir);
1209                 }
1210         }
1211
1212         if (ofi) {
1213                 if (ofibh.sbh != ofibh.ebh)
1214                         brelse(ofibh.ebh);
1215                 brelse(ofibh.sbh);
1216         }
1217
1218         retval = 0;
1219
1220 end_rename:
1221         brelse(dir_bh);
1222         if (nfi) {
1223                 if (nfibh.sbh != nfibh.ebh)
1224                         brelse(nfibh.ebh);
1225                 brelse(nfibh.sbh);
1226         }
1227         unlock_kernel();
1228
1229         return retval;
1230 }
1231
1232 const struct inode_operations udf_dir_inode_operations = {
1233         .lookup                         = udf_lookup,
1234         .create                         = udf_create,
1235         .link                           = udf_link,
1236         .unlink                         = udf_unlink,
1237         .symlink                        = udf_symlink,
1238         .mkdir                          = udf_mkdir,
1239         .rmdir                          = udf_rmdir,
1240         .mknod                          = udf_mknod,
1241         .rename                         = udf_rename,
1242 };