fs/udf/namei.c

   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 = NULL;
 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->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))
 171                         goto out_err;
 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                         goto out_err;
 184         }
 185
 186         fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
 187         if (!fname)
 188                 goto out_err;
 189
 190         while (f_pos < size) {
 191                 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
 192                                         &elen, &offset);
 193                 if (!fi)
 194                         goto out_err;
 195
 196                 liu = le16_to_cpu(cfi->lengthOfImpUse);
 197                 lfi = cfi->lengthFileIdent;
 198
 199                 if (fibh->sbh == fibh->ebh) {
 200                         nameptr = fi->fileIdent + liu;
 201                 } else {
 202                         int poffset;    /* Unpaded ending offset */
 203
 204                         poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
 205                                         liu + lfi;
 206
 207                         if (poffset >= lfi)
 208                                 nameptr = (uint8_t *)(fibh->ebh->b_data +
 209                                                       poffset - lfi);
 210                         else {
 211                                 nameptr = fname;
 212                                 memcpy(nameptr, fi->fileIdent + liu,
 213                                         lfi - poffset);
 214                                 memcpy(nameptr + lfi - poffset,
 215                                         fibh->ebh->b_data, poffset);
 216                         }
 217                 }
 218
 219                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
 220                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
 221                                 continue;
 222                 }
 223
 224                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
 225                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
 226                                 continue;
 227                 }
 228
 229                 if (!lfi)
 230                         continue;
 231
 232                 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
 233                 if (flen && udf_match(flen, fname, dentry->d_name.len,
 234                                       dentry->d_name.name))
 235                         goto out_ok;
 236         }
 237
 238 out_err:
 239         fi = NULL;
 240         if (fibh->sbh != fibh->ebh)
 241                 brelse(fibh->ebh);
 242         brelse(fibh->sbh);
 243 out_ok:
 244         brelse(epos.bh);
 245         kfree(fname);
 246
 247         return fi;
 248 }
 249
 250 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
 251                                  struct nameidata *nd)
 252 {
 253         struct inode *inode = NULL;
 254         struct fileIdentDesc cfi;
 255         struct udf_fileident_bh fibh;
 256
 257         if (dentry->d_name.len > UDF_NAME_LEN - 2)
 258                 return ERR_PTR(-ENAMETOOLONG);
 259
 260         lock_kernel();
 261 #ifdef UDF_RECOVERY
 262         /* temporary shorthand for specifying files by inode number */
 263         if (!strncmp(dentry->d_name.name, ".B=", 3)) {
 264                 kernel_lb_addr lb = {
 265                         .logicalBlockNum = 0,
 266                         .partitionReferenceNum =
 267                                 simple_strtoul(dentry->d_name.name + 3,
 268                                                 NULL, 0),
 269                 };
 270                 inode = udf_iget(dir->i_sb, lb);
 271                 if (!inode) {
 272                         unlock_kernel();
 273                         return ERR_PTR(-EACCES);
 274                 }
 275         } else
 276 #endif /* UDF_RECOVERY */
 277
 278         if (udf_find_entry(dir, dentry, &fibh, &cfi)) {
 279                 if (fibh.sbh != fibh.ebh)
 280                         brelse(fibh.ebh);
 281                 brelse(fibh.sbh);
 282
 283                 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
 284                 if (!inode) {
 285                         unlock_kernel();
 286                         return ERR_PTR(-EACCES);
 287                 }
 288         }
 289         unlock_kernel();
 290         d_add(dentry, inode);
 291
 292         return NULL;
 293 }
 294
 295 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 296                                            struct dentry *dentry,
 297                                            struct udf_fileident_bh *fibh,
 298                                            struct fileIdentDesc *cfi, int *err)
 299 {
 300         struct super_block *sb = dir->i_sb;
 301         struct fileIdentDesc *fi = NULL;
 302         char *name = NULL;
 303         int namelen;
 304         loff_t f_pos;
 305         loff_t size = udf_ext0_offset(dir) + dir->i_size;
 306         int nfidlen;
 307         uint8_t lfi;
 308         uint16_t liu;
 309         int block;
 310         kernel_lb_addr eloc;
 311         uint32_t elen;
 312         sector_t offset;
 313         struct extent_position epos = {};
 314         struct udf_inode_info *dinfo;
 315
 316         fibh->sbh = fibh->ebh = NULL;
 317         name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
 318         if (!name) {
 319                 *err = -ENOMEM;
 320                 goto out_err;
 321         }
 322
 323         if (dentry) {
 324                 if (!dentry->d_name.len) {
 325                         *err = -EINVAL;
 326                         goto out_err;
 327                 }
 328                 namelen = udf_put_filename(sb, dentry->d_name.name, name,
 329                                                  dentry->d_name.len);
 330                 if (!namelen) {
 331                         *err = -ENAMETOOLONG;
 332                         goto out_err;
 333                 }
 334         } else {
 335                 namelen = 0;
 336         }
 337
 338         nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
 339
 340         f_pos = udf_ext0_offset(dir);
 341
 342         fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
 343         dinfo = UDF_I(dir);
 344         if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 345                 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
 346                     &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
 347                         block = udf_get_lb_pblock(dir->i_sb,
 348                                         dinfo->i_location, 0);
 349                         fibh->soffset = fibh->eoffset = sb->s_blocksize;
 350                         goto add;
 351                 }
 352                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 353                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 354                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 355                                 epos.offset -= sizeof(short_ad);
 356                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 357                                 epos.offset -= sizeof(long_ad);
 358                 } else
 359                         offset = 0;
 360
 361                 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
 362                 if (!fibh->sbh) {
 363                         *err = -EIO;
 364                         goto out_err;
 365                 }
 366
 367                 block = dinfo->i_location.logicalBlockNum;
 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                         *err = -EIO;
 376                         goto out_err;
 377                 }
 378
 379                 liu = le16_to_cpu(cfi->lengthOfImpUse);
 380                 lfi = cfi->lengthFileIdent;
 381
 382                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
 383                         if (((sizeof(struct fileIdentDesc) +
 384                                         liu + lfi + 3) & ~3) == nfidlen) {
 385                                 cfi->descTag.tagSerialNum = cpu_to_le16(1);
 386                                 cfi->fileVersionNum = cpu_to_le16(1);
 387                                 cfi->fileCharacteristics = 0;
 388                                 cfi->lengthFileIdent = namelen;
 389                                 cfi->lengthOfImpUse = cpu_to_le16(0);
 390                                 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
 391                                                   name))
 392                                         goto out_ok;
 393                                 else {
 394                                         *err = -EIO;
 395                                         goto out_err;
 396                                 }
 397                         }
 398                 }
 399         }
 400
 401 add:
 402         if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 403                 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
 404                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 405                         epos.offset -= sizeof(short_ad);
 406                 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 407                         epos.offset -= sizeof(long_ad);
 408                 udf_write_aext(dir, &epos, eloc, elen, 1);
 409         }
 410         f_pos += nfidlen;
 411
 412         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
 413             sb->s_blocksize - fibh->eoffset < nfidlen) {
 414                 brelse(epos.bh);
 415                 epos.bh = NULL;
 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)
 420                         brelse(fibh->ebh);
 421                 brelse(fibh->sbh);
 422                 fibh->sbh = fibh->ebh =
 423                                 udf_expand_dir_adinicb(dir, &block, err);
 424                 if (!fibh->sbh)
 425                         goto out_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);
 430         }
 431
 432         if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
 433                 fibh->soffset = fibh->eoffset;
 434                 fibh->eoffset += nfidlen;
 435                 if (fibh->sbh != fibh->ebh) {
 436                         brelse(fibh->sbh);
 437                         fibh->sbh = fibh->ebh;
 438                 }
 439
 440                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
 441                         block = dinfo->i_location.logicalBlockNum;
 442                         fi = (struct fileIdentDesc *)
 443                                         (dinfo->i_ext.i_data +
 444                                          fibh->soffset -
 445                                          udf_ext0_offset(dir) +
 446                                          dinfo->i_lenEAttr);
 447                 } else {
 448                         block = eloc.logicalBlockNum +
 449                                         ((elen - 1) >>
 450                                                 dir->i_sb->s_blocksize_bits);
 451                         fi = (struct fileIdentDesc *)
 452                                 (fibh->sbh->b_data + fibh->soffset);
 453                 }
 454         } else {
 455                 fibh->soffset = fibh->eoffset - sb->s_blocksize;
 456                 fibh->eoffset += nfidlen - sb->s_blocksize;
 457                 if (fibh->sbh != fibh->ebh) {
 458                         brelse(fibh->sbh);
 459                         fibh->sbh = fibh->ebh;
 460                 }
 461
 462                 block = eloc.logicalBlockNum + ((elen - 1) >>
 463                                                 dir->i_sb->s_blocksize_bits);
 464                 fibh->ebh = udf_bread(dir,
 465                                 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
 466                 if (!fibh->ebh)
 467                         goto out_err;
 468
 469                 if (!fibh->soffset) {
 470                         if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
 471                             (EXT_RECORDED_ALLOCATED >> 30)) {
 472                                 block = eloc.logicalBlockNum + ((elen - 1) >>
 473                                         dir->i_sb->s_blocksize_bits);
 474                         } else
 475                                 block++;
 476
 477                         brelse(fibh->sbh);
 478                         fibh->sbh = fibh->ebh;
 479                         fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
 480                 } else {
 481                         fi = (struct fileIdentDesc *)
 482                                 (fibh->sbh->b_data + sb->s_blocksize +
 483                                         fibh->soffset);
 484                 }
 485         }
 486
 487         memset(cfi, 0, sizeof(struct fileIdentDesc));
 488         if (UDF_SB(sb)->s_udfrev >= 0x0200)
 489                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
 490                             sizeof(tag));
 491         else
 492                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
 493                             sizeof(tag));
 494         cfi->fileVersionNum = cpu_to_le16(1);
 495         cfi->lengthFileIdent = namelen;
 496         cfi->lengthOfImpUse = cpu_to_le16(0);
 497         if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
 498                 dir->i_size += nfidlen;
 499                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 500                         dinfo->i_lenAlloc += nfidlen;
 501                 mark_inode_dirty(dir);
 502                 goto out_ok;
 503         } else {
 504                 *err = -EIO;
 505                 goto out_err;
 506         }
 507
 508 out_err:
 509         fi = NULL;
 510         if (fibh->sbh != fibh->ebh)
 511                 brelse(fibh->ebh);
 512         brelse(fibh->sbh);
 513 out_ok:
 514         brelse(epos.bh);
 515         kfree(name);
 516         return fi;
 517 }
 518
 519 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
 520                             struct udf_fileident_bh *fibh,
 521                             struct fileIdentDesc *cfi)
 522 {
 523         cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
 524
 525         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
 526                 memset(&(cfi->icb), 0x00, sizeof(long_ad));
 527
 528         return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
 529 }
 530
 531 static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
 532                       struct nameidata *nd)
 533 {
 534         struct udf_fileident_bh fibh;
 535         struct inode *inode;
 536         struct fileIdentDesc cfi, *fi;
 537         int err;
 538         struct udf_inode_info *iinfo;
 539
 540         lock_kernel();
 541         inode = udf_new_inode(dir, mode, &err);
 542         if (!inode) {
 543                 unlock_kernel();
 544                 return err;
 545         }
 546
 547         iinfo = UDF_I(inode);
 548         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 549                 inode->i_data.a_ops = &udf_adinicb_aops;
 550         else
 551                 inode->i_data.a_ops = &udf_aops;
 552         inode->i_op = &udf_file_inode_operations;
 553         inode->i_fop = &udf_file_operations;
 554         inode->i_mode = mode;
 555         mark_inode_dirty(inode);
 556
 557         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 558         if (!fi) {
 559                 inode->i_nlink--;
 560                 mark_inode_dirty(inode);
 561                 iput(inode);
 562                 unlock_kernel();
 563                 return err;
 564         }
 565         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 566         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 567         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 568                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 569         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 570         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 571                 mark_inode_dirty(dir);
 572         if (fibh.sbh != fibh.ebh)
 573                 brelse(fibh.ebh);
 574         brelse(fibh.sbh);
 575         unlock_kernel();
 576         d_instantiate(dentry, inode);
 577
 578         return 0;
 579 }
 580
 581 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
 582                      dev_t rdev)
 583 {
 584         struct inode *inode;
 585         struct udf_fileident_bh fibh;
 586         struct fileIdentDesc cfi, *fi;
 587         int err;
 588         struct udf_inode_info *iinfo;
 589
 590         if (!old_valid_dev(rdev))
 591                 return -EINVAL;
 592
 593         lock_kernel();
 594         err = -EIO;
 595         inode = udf_new_inode(dir, mode, &err);
 596         if (!inode)
 597                 goto out;
 598
 599         iinfo = UDF_I(inode);
 600         inode->i_uid = current->fsuid;
 601         init_special_inode(inode, mode, rdev);
 602         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 603         if (!fi) {
 604                 inode->i_nlink--;
 605                 mark_inode_dirty(inode);
 606                 iput(inode);
 607                 unlock_kernel();
 608                 return err;
 609         }
 610         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 611         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 612         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 613                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 614         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 615         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 616                 mark_inode_dirty(dir);
 617         mark_inode_dirty(inode);
 618
 619         if (fibh.sbh != fibh.ebh)
 620                 brelse(fibh.ebh);
 621         brelse(fibh.sbh);
 622         d_instantiate(dentry, inode);
 623         err = 0;
 624
 625 out:
 626         unlock_kernel();
 627         return err;
 628 }
 629
 630 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 631 {
 632         struct inode *inode;
 633         struct udf_fileident_bh fibh;
 634         struct fileIdentDesc cfi, *fi;
 635         int err;
 636         struct udf_inode_info *dinfo = UDF_I(dir);
 637         struct udf_inode_info *iinfo;
 638
 639         lock_kernel();
 640         err = -EMLINK;
 641         if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
 642                 goto out;
 643
 644         err = -EIO;
 645         inode = udf_new_inode(dir, S_IFDIR, &err);
 646         if (!inode)
 647                 goto out;
 648
 649         iinfo = UDF_I(inode);
 650         inode->i_op = &udf_dir_inode_operations;
 651         inode->i_fop = &udf_dir_operations;
 652         fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
 653         if (!fi) {
 654                 inode->i_nlink--;
 655                 mark_inode_dirty(inode);
 656                 iput(inode);
 657                 goto out;
 658         }
 659         inode->i_nlink = 2;
 660         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 661         cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
 662         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 663                 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
 664         cfi.fileCharacteristics =
 665                         FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
 666         udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
 667         brelse(fibh.sbh);
 668         inode->i_mode = S_IFDIR | mode;
 669         if (dir->i_mode & S_ISGID)
 670                 inode->i_mode |= S_ISGID;
 671         mark_inode_dirty(inode);
 672
 673         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 674         if (!fi) {
 675                 inode->i_nlink = 0;
 676                 mark_inode_dirty(inode);
 677                 iput(inode);
 678                 goto out;
 679         }
 680         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 681         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 682         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 683                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 684         cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
 685         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 686         inc_nlink(dir);
 687         mark_inode_dirty(dir);
 688         d_instantiate(dentry, inode);
 689         if (fibh.sbh != fibh.ebh)
 690                 brelse(fibh.ebh);
 691         brelse(fibh.sbh);
 692         err = 0;
 693
 694 out:
 695         unlock_kernel();
 696         return err;
 697 }
 698
 699 static int empty_dir(struct inode *dir)
 700 {
 701         struct fileIdentDesc *fi, cfi;
 702         struct udf_fileident_bh fibh;
 703         loff_t f_pos;
 704         loff_t size = udf_ext0_offset(dir) + dir->i_size;
 705         int block;
 706         kernel_lb_addr eloc;
 707         uint32_t elen;
 708         sector_t offset;
 709         struct extent_position epos = {};
 710         struct udf_inode_info *dinfo = UDF_I(dir);
 711
 712         f_pos = udf_ext0_offset(dir);
 713         fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
 714
 715         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 716                 fibh.sbh = fibh.ebh = NULL;
 717         else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
 718                               &epos, &eloc, &elen, &offset) ==
 719                                         (EXT_RECORDED_ALLOCATED >> 30)) {
 720                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 721                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 722                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 723                                 epos.offset -= sizeof(short_ad);
 724                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 725                                 epos.offset -= sizeof(long_ad);
 726                 } else
 727                         offset = 0;
 728
 729                 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
 730                 if (!fibh.sbh) {
 731                         brelse(epos.bh);
 732                         return 0;
 733                 }
 734         } else {
 735                 brelse(epos.bh);
 736                 return 0;
 737         }
 738
 739         while (f_pos < size) {
 740                 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
 741                                         &elen, &offset);
 742                 if (!fi) {
 743                         if (fibh.sbh != fibh.ebh)
 744                                 brelse(fibh.ebh);
 745                         brelse(fibh.sbh);
 746                         brelse(epos.bh);
 747                         return 0;
 748                 }
 749
 750                 if (cfi.lengthFileIdent &&
 751                     (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
 752                         if (fibh.sbh != fibh.ebh)
 753                                 brelse(fibh.ebh);
 754                         brelse(fibh.sbh);
 755                         brelse(epos.bh);
 756                         return 0;
 757                 }
 758         }
 759
 760         if (fibh.sbh != fibh.ebh)
 761                 brelse(fibh.ebh);
 762         brelse(fibh.sbh);
 763         brelse(epos.bh);
 764
 765         return 1;
 766 }
 767
 768 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
 769 {
 770         int retval;
 771         struct inode *inode = dentry->d_inode;
 772         struct udf_fileident_bh fibh;
 773         struct fileIdentDesc *fi, cfi;
 774         kernel_lb_addr tloc;
 775
 776         retval = -ENOENT;
 777         lock_kernel();
 778         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
 779         if (!fi)
 780                 goto out;
 781
 782         retval = -EIO;
 783         tloc = lelb_to_cpu(cfi.icb.extLocation);
 784         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
 785                 goto end_rmdir;
 786         retval = -ENOTEMPTY;
 787         if (!empty_dir(inode))
 788                 goto end_rmdir;
 789         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
 790         if (retval)
 791                 goto end_rmdir;
 792         if (inode->i_nlink != 2)
 793                 udf_warning(inode->i_sb, "udf_rmdir",
 794                             "empty directory has nlink != 2 (%d)",
 795                             inode->i_nlink);
 796         clear_nlink(inode);
 797         inode->i_size = 0;
 798         inode_dec_link_count(dir);
 799         inode->i_ctime = dir->i_ctime = dir->i_mtime =
 800                                                 current_fs_time(dir->i_sb);
 801         mark_inode_dirty(dir);
 802
 803 end_rmdir:
 804         if (fibh.sbh != fibh.ebh)
 805                 brelse(fibh.ebh);
 806         brelse(fibh.sbh);
 807
 808 out:
 809         unlock_kernel();
 810         return retval;
 811 }
 812
 813 static int udf_unlink(struct inode *dir, struct dentry *dentry)
 814 {
 815         int retval;
 816         struct inode *inode = dentry->d_inode;
 817         struct udf_fileident_bh fibh;
 818         struct fileIdentDesc *fi;
 819         struct fileIdentDesc cfi;
 820         kernel_lb_addr tloc;
 821
 822         retval = -ENOENT;
 823         lock_kernel();
 824         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
 825         if (!fi)
 826                 goto out;
 827
 828         retval = -EIO;
 829         tloc = lelb_to_cpu(cfi.icb.extLocation);
 830         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
 831                 goto end_unlink;
 832
 833         if (!inode->i_nlink) {
 834                 udf_debug("Deleting nonexistent file (%lu), %d\n",
 835                           inode->i_ino, inode->i_nlink);
 836                 inode->i_nlink = 1;
 837         }
 838         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
 839         if (retval)
 840                 goto end_unlink;
 841         dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
 842         mark_inode_dirty(dir);
 843         inode_dec_link_count(inode);
 844         inode->i_ctime = dir->i_ctime;
 845         retval = 0;
 846
 847 end_unlink:
 848         if (fibh.sbh != fibh.ebh)
 849                 brelse(fibh.ebh);
 850         brelse(fibh.sbh);
 851
 852 out:
 853         unlock_kernel();
 854         return retval;
 855 }
 856
 857 static int udf_symlink(struct inode *dir, struct dentry *dentry,
 858                        const char *symname)
 859 {
 860         struct inode *inode;
 861         struct pathComponent *pc;
 862         char *compstart;
 863         struct udf_fileident_bh fibh;
 864         struct extent_position epos = {};
 865         int eoffset, elen = 0;
 866         struct fileIdentDesc *fi;
 867         struct fileIdentDesc cfi;
 868         char *ea;
 869         int err;
 870         int block;
 871         char *name = NULL;
 872         int namelen;
 873         struct buffer_head *bh;
 874         struct udf_inode_info *iinfo;
 875
 876         lock_kernel();
 877         inode = udf_new_inode(dir, S_IFLNK, &err);
 878         if (!inode)
 879                 goto out;
 880
 881         name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
 882         if (!name) {
 883                 err = -ENOMEM;
 884                 goto out_no_entry;
 885         }
 886
 887         iinfo = UDF_I(inode);
 888         inode->i_mode = S_IFLNK | S_IRWXUGO;
 889         inode->i_data.a_ops = &udf_symlink_aops;
 890         inode->i_op = &page_symlink_inode_operations;
 891
 892         if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 893                 kernel_lb_addr eloc;
 894                 uint32_t elen;
 895
 896                 block = udf_new_block(inode->i_sb, inode,
 897                                 iinfo->i_location.partitionReferenceNum,
 898                                 iinfo->i_location.logicalBlockNum, &err);
 899                 if (!block)
 900                         goto out_no_entry;
 901                 epos.block = iinfo->i_location;
 902                 epos.offset = udf_file_entry_alloc_offset(inode);
 903                 epos.bh = NULL;
 904                 eloc.logicalBlockNum = block;
 905                 eloc.partitionReferenceNum =
 906                                 iinfo->i_location.partitionReferenceNum;
 907                 elen = inode->i_sb->s_blocksize;
 908                 iinfo->i_lenExtents = elen;
 909                 udf_add_aext(inode, &epos, eloc, elen, 0);
 910                 brelse(epos.bh);
 911
 912                 block = udf_get_pblock(inode->i_sb, block,
 913                                 iinfo->i_location.partitionReferenceNum,
 914                                 0);
 915                 epos.bh = udf_tread(inode->i_sb, block);
 916                 lock_buffer(epos.bh);
 917                 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
 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);
 922         } else
 923                 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
 924
 925         eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
 926         pc = (struct pathComponent *)ea;
 927
 928         if (*symname == '/') {
 929                 do {
 930                         symname++;
 931                 } while (*symname == '/');
 932
 933                 pc->componentType = 1;
 934                 pc->lengthComponentIdent = 0;
 935                 pc->componentFileVersionNum = 0;
 936                 pc += sizeof(struct pathComponent);
 937                 elen += sizeof(struct pathComponent);
 938         }
 939
 940         err = -ENAMETOOLONG;
 941
 942         while (*symname) {
 943                 if (elen + sizeof(struct pathComponent) > eoffset)
 944                         goto out_no_entry;
 945
 946                 pc = (struct pathComponent *)(ea + elen);
 947
 948                 compstart = (char *)symname;
 949
 950                 do {
 951                         symname++;
 952                 } while (*symname && *symname != '/');
 953
 954                 pc->componentType = 5;
 955                 pc->lengthComponentIdent = 0;
 956                 pc->componentFileVersionNum = 0;
 957                 if (compstart[0] == '.') {
 958                         if ((symname - compstart) == 1)
 959                                 pc->componentType = 4;
 960                         else if ((symname - compstart) == 2 &&
 961                                         compstart[1] == '.')
 962                                 pc->componentType = 3;
 963                 }
 964
 965                 if (pc->componentType == 5) {
 966                         namelen = udf_put_filename(inode->i_sb, compstart, name,
 967                                                    symname - compstart);
 968                         if (!namelen)
 969                                 goto out_no_entry;
 970
 971                         if (elen + sizeof(struct pathComponent) + namelen >
 972                                         eoffset)
 973                                 goto out_no_entry;
 974                         else
 975                                 pc->lengthComponentIdent = namelen;
 976
 977                         memcpy(pc->componentIdent, name, namelen);
 978                 }
 979
 980                 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
 981
 982                 if (*symname) {
 983                         do {
 984                                 symname++;
 985                         } while (*symname == '/');
 986                 }
 987         }
 988
 989         brelse(epos.bh);
 990         inode->i_size = elen;
 991         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 992                 iinfo->i_lenAlloc = inode->i_size;
 993         mark_inode_dirty(inode);
 994
 995         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 996         if (!fi)
 997                 goto out_no_entry;
 998         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 999         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
1000         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1001         if (bh) {
1002                 struct logicalVolIntegrityDesc *lvid =
1003                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1004                 struct logicalVolHeaderDesc *lvhd;
1005                 uint64_t uniqueID;
1006                 lvhd = (struct logicalVolHeaderDesc *)
1007                                 lvid->logicalVolContentsUse;
1008                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1009                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1010                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1011                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1012                         uniqueID += 16;
1013                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1014                 mark_buffer_dirty(bh);
1015         }
1016         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1017         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1018                 mark_inode_dirty(dir);
1019         if (fibh.sbh != fibh.ebh)
1020                 brelse(fibh.ebh);
1021         brelse(fibh.sbh);
1022         d_instantiate(dentry, inode);
1023         err = 0;
1024
1025 out:
1026         kfree(name);
1027         unlock_kernel();
1028         return err;
1029
1030 out_no_entry:
1031         inode_dec_link_count(inode);
1032         iput(inode);
1033         goto out;
1034 }
1035
1036 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1037                     struct dentry *dentry)
1038 {
1039         struct inode *inode = old_dentry->d_inode;
1040         struct udf_fileident_bh fibh;
1041         struct fileIdentDesc cfi, *fi;
1042         int err;
1043         struct buffer_head *bh;
1044
1045         lock_kernel();
1046         if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
1047                 unlock_kernel();
1048                 return -EMLINK;
1049         }
1050
1051         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1052         if (!fi) {
1053                 unlock_kernel();
1054                 return err;
1055         }
1056         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1057         cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1058         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1059         if (bh) {
1060                 struct logicalVolIntegrityDesc *lvid =
1061                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1062                 struct logicalVolHeaderDesc *lvhd;
1063                 uint64_t uniqueID;
1064                 lvhd = (struct logicalVolHeaderDesc *)
1065                                 (lvid->logicalVolContentsUse);
1066                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1067                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1068                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1069                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1070                         uniqueID += 16;
1071                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1072                 mark_buffer_dirty(bh);
1073         }
1074         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1075         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1076                 mark_inode_dirty(dir);
1077
1078         if (fibh.sbh != fibh.ebh)
1079                 brelse(fibh.ebh);
1080         brelse(fibh.sbh);
1081         inc_nlink(inode);
1082         inode->i_ctime = current_fs_time(inode->i_sb);
1083         mark_inode_dirty(inode);
1084         atomic_inc(&inode->i_count);
1085         d_instantiate(dentry, inode);
1086         unlock_kernel();
1087
1088         return 0;
1089 }
1090
1091 /* Anybody can rename anything with this: the permission checks are left to the
1092  * higher-level routines.
1093  */
1094 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1095                       struct inode *new_dir, struct dentry *new_dentry)
1096 {
1097         struct inode *old_inode = old_dentry->d_inode;
1098         struct inode *new_inode = new_dentry->d_inode;
1099         struct udf_fileident_bh ofibh, nfibh;
1100         struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1101         struct fileIdentDesc ocfi, ncfi;
1102         struct buffer_head *dir_bh = NULL;
1103         int retval = -ENOENT;
1104         kernel_lb_addr tloc;
1105         struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1106
1107         lock_kernel();
1108         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1109         if (ofi) {
1110                 if (ofibh.sbh != ofibh.ebh)
1111                         brelse(ofibh.ebh);
1112                 brelse(ofibh.sbh);
1113         }
1114         tloc = lelb_to_cpu(ocfi.icb.extLocation);
1115         if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1116             != old_inode->i_ino)
1117                 goto end_rename;
1118
1119         nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1120         if (nfi) {
1121                 if (!new_inode) {
1122                         if (nfibh.sbh != nfibh.ebh)
1123                                 brelse(nfibh.ebh);
1124                         brelse(nfibh.sbh);
1125                         nfi = NULL;
1126                 }
1127         }
1128         if (S_ISDIR(old_inode->i_mode)) {
1129                 int offset = udf_ext0_offset(old_inode);
1130
1131                 if (new_inode) {
1132                         retval = -ENOTEMPTY;
1133                         if (!empty_dir(new_inode))
1134                                 goto end_rename;
1135                 }
1136                 retval = -EIO;
1137                 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1138                         dir_fi = udf_get_fileident(
1139                                         old_iinfo->i_ext.i_data -
1140                                           (old_iinfo->i_efe ?
1141                                            sizeof(struct extendedFileEntry) :
1142                                            sizeof(struct fileEntry)),
1143                                         old_inode->i_sb->s_blocksize, &offset);
1144                 } else {
1145                         dir_bh = udf_bread(old_inode, 0, 0, &retval);
1146                         if (!dir_bh)
1147                                 goto end_rename;
1148                         dir_fi = udf_get_fileident(dir_bh->b_data,
1149                                         old_inode->i_sb->s_blocksize, &offset);
1150                 }
1151                 if (!dir_fi)
1152                         goto end_rename;
1153                 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1154                 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) !=
1155                                 old_dir->i_ino)
1156                         goto end_rename;
1157
1158                 retval = -EMLINK;
1159                 if (!new_inode &&
1160                         new_dir->i_nlink >=
1161                                 (256 << sizeof(new_dir->i_nlink)) - 1)
1162                         goto end_rename;
1163         }
1164         if (!nfi) {
1165                 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1166                                     &retval);
1167                 if (!nfi)
1168                         goto end_rename;
1169         }
1170
1171         /*
1172          * Like most other Unix systems, set the ctime for inodes on a
1173          * rename.
1174          */
1175         old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1176         mark_inode_dirty(old_inode);
1177
1178         /*
1179          * ok, that's it
1180          */
1181         ncfi.fileVersionNum = ocfi.fileVersionNum;
1182         ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1183         memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1184         udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1185
1186         /* The old fid may have moved - find it again */
1187         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1188         udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1189
1190         if (new_inode) {
1191                 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1192                 inode_dec_link_count(new_inode);
1193         }
1194         old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1195         mark_inode_dirty(old_dir);
1196
1197         if (dir_fi) {
1198                 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1199                 udf_update_tag((char *)dir_fi,
1200                                 (sizeof(struct fileIdentDesc) +
1201                                 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1202                 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1203                         mark_inode_dirty(old_inode);
1204                 else
1205                         mark_buffer_dirty_inode(dir_bh, old_inode);
1206
1207                 inode_dec_link_count(old_dir);
1208                 if (new_inode)
1209                         inode_dec_link_count(new_inode);
1210                 else {
1211                         inc_nlink(new_dir);
1212                         mark_inode_dirty(new_dir);
1213                 }
1214         }
1215
1216         if (ofi) {
1217                 if (ofibh.sbh != ofibh.ebh)
1218                         brelse(ofibh.ebh);
1219                 brelse(ofibh.sbh);
1220         }
1221
1222         retval = 0;
1223
1224 end_rename:
1225         brelse(dir_bh);
1226         if (nfi) {
1227                 if (nfibh.sbh != nfibh.ebh)
1228                         brelse(nfibh.ebh);
1229                 brelse(nfibh.sbh);
1230         }
1231         unlock_kernel();
1232
1233         return retval;
1234 }
1235
1236 const struct inode_operations udf_dir_inode_operations = {
1237         .lookup                         = udf_lookup,
1238         .create                         = udf_create,
1239         .link                           = udf_link,
1240         .unlink                         = udf_unlink,
1241         .symlink                        = udf_symlink,
1242         .mkdir                          = udf_mkdir,
1243         .rmdir                          = udf_rmdir,
1244         .mknod                          = udf_mknod,
1245         .rename                         = udf_rename,
1246 };