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 #include <linux/crc-itu-t.h>
  35
  36 static inline int udf_match(int len1, const char *name1, int len2,
  37                             const char *name2)
  38 {
  39         if (len1 != len2)
  40                 return 0;
  41
  42         return !memcmp(name1, name2, len1);
  43 }
  44
  45 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
  46                  struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
  47                  uint8_t *impuse, uint8_t *fileident)
  48 {
  49         uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
  50         uint16_t crc;
  51         int offset;
  52         uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
  53         uint8_t lfi = cfi->lengthFileIdent;
  54         int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
  55                 sizeof(struct fileIdentDesc);
  56         int adinicb = 0;
  57
  58         if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
  59                 adinicb = 1;
  60
  61         offset = fibh->soffset + sizeof(struct fileIdentDesc);
  62
  63         if (impuse) {
  64                 if (adinicb || (offset + liu < 0)) {
  65                         memcpy((uint8_t *)sfi->impUse, impuse, liu);
  66                 } else if (offset >= 0) {
  67                         memcpy(fibh->ebh->b_data + offset, impuse, liu);
  68                 } else {
  69                         memcpy((uint8_t *)sfi->impUse, impuse, -offset);
  70                         memcpy(fibh->ebh->b_data, impuse - offset,
  71                                 liu + offset);
  72                 }
  73         }
  74
  75         offset += liu;
  76
  77         if (fileident) {
  78                 if (adinicb || (offset + lfi < 0)) {
  79                         memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
  80                 } else if (offset >= 0) {
  81                         memcpy(fibh->ebh->b_data + offset, fileident, lfi);
  82                 } else {
  83                         memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
  84                                 -offset);
  85                         memcpy(fibh->ebh->b_data, fileident - offset,
  86                                 lfi + offset);
  87                 }
  88         }
  89
  90         offset += lfi;
  91
  92         if (adinicb || (offset + padlen < 0)) {
  93                 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
  94         } else if (offset >= 0) {
  95                 memset(fibh->ebh->b_data + offset, 0x00, padlen);
  96         } else {
  97                 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
  98                 memset(fibh->ebh->b_data, 0x00, padlen + offset);
  99         }
 100
 101         crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(tag),
 102                       sizeof(struct fileIdentDesc) - sizeof(tag));
 103
 104         if (fibh->sbh == fibh->ebh) {
 105                 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
 106                               crclen + sizeof(tag) -
 107                               sizeof(struct fileIdentDesc));
 108         } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
 109                 crc = crc_itu_t(crc, fibh->ebh->b_data +
 110                                         sizeof(struct fileIdentDesc) +
 111                                         fibh->soffset,
 112                               crclen + sizeof(tag) -
 113                                         sizeof(struct fileIdentDesc));
 114         } else {
 115                 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
 116                               -fibh->soffset - sizeof(struct fileIdentDesc));
 117                 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
 118         }
 119
 120         cfi->descTag.descCRC = cpu_to_le16(crc);
 121         cfi->descTag.descCRCLength = cpu_to_le16(crclen);
 122         cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
 123
 124         if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
 125                 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
 126                         sizeof(struct fileIdentDesc));
 127         } else {
 128                 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
 129                 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
 130                        sizeof(struct fileIdentDesc) + fibh->soffset);
 131         }
 132
 133         if (adinicb) {
 134                 mark_inode_dirty(inode);
 135         } else {
 136                 if (fibh->sbh != fibh->ebh)
 137                         mark_buffer_dirty_inode(fibh->ebh, inode);
 138                 mark_buffer_dirty_inode(fibh->sbh, inode);
 139         }
 140         return 0;
 141 }
 142
 143 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
 144                                             struct dentry *dentry,
 145                                             struct udf_fileident_bh *fibh,
 146                                             struct fileIdentDesc *cfi)
 147 {
 148         struct fileIdentDesc *fi = NULL;
 149         loff_t f_pos;
 150         int block, flen;
 151         char *fname = NULL;
 152         char *nameptr;
 153         uint8_t lfi;
 154         uint16_t liu;
 155         loff_t size;
 156         kernel_lb_addr eloc;
 157         uint32_t elen;
 158         sector_t offset;
 159         struct extent_position epos = {};
 160         struct udf_inode_info *dinfo = UDF_I(dir);
 161
 162         size = udf_ext0_offset(dir) + dir->i_size;
 163         f_pos = udf_ext0_offset(dir);
 164
 165         fibh->sbh = fibh->ebh = NULL;
 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                 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
 169                     &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
 170                         goto out_err;
 171                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 172                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 173                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 174                                 epos.offset -= sizeof(short_ad);
 175                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 176                                 epos.offset -= sizeof(long_ad);
 177                 } else
 178                         offset = 0;
 179
 180                 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
 181                 if (!fibh->sbh)
 182                         goto out_err;
 183         }
 184
 185         fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
 186         if (!fname)
 187                 goto out_err;
 188
 189         while (f_pos < size) {
 190                 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
 191                                         &elen, &offset);
 192                 if (!fi)
 193                         goto out_err;
 194
 195                 liu = le16_to_cpu(cfi->lengthOfImpUse);
 196                 lfi = cfi->lengthFileIdent;
 197
 198                 if (fibh->sbh == fibh->ebh) {
 199                         nameptr = fi->fileIdent + liu;
 200                 } else {
 201                         int poffset;    /* Unpaded ending offset */
 202
 203                         poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
 204                                         liu + lfi;
 205
 206                         if (poffset >= lfi)
 207                                 nameptr = (uint8_t *)(fibh->ebh->b_data +
 208                                                       poffset - lfi);
 209                         else {
 210                                 nameptr = fname;
 211                                 memcpy(nameptr, fi->fileIdent + liu,
 212                                         lfi - poffset);
 213                                 memcpy(nameptr + lfi - poffset,
 214                                         fibh->ebh->b_data, poffset);
 215                         }
 216                 }
 217
 218                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
 219                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
 220                                 continue;
 221                 }
 222
 223                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
 224                         if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
 225                                 continue;
 226                 }
 227
 228                 if (!lfi)
 229                         continue;
 230
 231                 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
 232                 if (flen && udf_match(flen, fname, dentry->d_name.len,
 233                                       dentry->d_name.name))
 234                         goto out_ok;
 235         }
 236
 237 out_err:
 238         fi = NULL;
 239         if (fibh->sbh != fibh->ebh)
 240                 brelse(fibh->ebh);
 241         brelse(fibh->sbh);
 242 out_ok:
 243         brelse(epos.bh);
 244         kfree(fname);
 245
 246         return fi;
 247 }
 248
 249 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
 250                                  struct nameidata *nd)
 251 {
 252         struct inode *inode = NULL;
 253         struct fileIdentDesc cfi;
 254         struct udf_fileident_bh fibh;
 255
 256         if (dentry->d_name.len > UDF_NAME_LEN - 2)
 257                 return ERR_PTR(-ENAMETOOLONG);
 258
 259         lock_kernel();
 260 #ifdef UDF_RECOVERY
 261         /* temporary shorthand for specifying files by inode number */
 262         if (!strncmp(dentry->d_name.name, ".B=", 3)) {
 263                 kernel_lb_addr lb = {
 264                         .logicalBlockNum = 0,
 265                         .partitionReferenceNum =
 266                                 simple_strtoul(dentry->d_name.name + 3,
 267                                                 NULL, 0),
 268                 };
 269                 inode = udf_iget(dir->i_sb, lb);
 270                 if (!inode) {
 271                         unlock_kernel();
 272                         return ERR_PTR(-EACCES);
 273                 }
 274         } else
 275 #endif /* UDF_RECOVERY */
 276
 277         if (udf_find_entry(dir, dentry, &fibh, &cfi)) {
 278                 if (fibh.sbh != fibh.ebh)
 279                         brelse(fibh.ebh);
 280                 brelse(fibh.sbh);
 281
 282                 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
 283                 if (!inode) {
 284                         unlock_kernel();
 285                         return ERR_PTR(-EACCES);
 286                 }
 287         }
 288         unlock_kernel();
 289         d_add(dentry, inode);
 290
 291         return NULL;
 292 }
 293
 294 static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 295                                            struct dentry *dentry,
 296                                            struct udf_fileident_bh *fibh,
 297                                            struct fileIdentDesc *cfi, int *err)
 298 {
 299         struct super_block *sb = dir->i_sb;
 300         struct fileIdentDesc *fi = NULL;
 301         char *name = NULL;
 302         int namelen;
 303         loff_t f_pos;
 304         loff_t size = udf_ext0_offset(dir) + dir->i_size;
 305         int nfidlen;
 306         uint8_t lfi;
 307         uint16_t liu;
 308         int block;
 309         kernel_lb_addr eloc;
 310         uint32_t elen;
 311         sector_t offset;
 312         struct extent_position epos = {};
 313         struct udf_inode_info *dinfo;
 314
 315         fibh->sbh = fibh->ebh = NULL;
 316         name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
 317         if (!name) {
 318                 *err = -ENOMEM;
 319                 goto out_err;
 320         }
 321
 322         if (dentry) {
 323                 if (!dentry->d_name.len) {
 324                         *err = -EINVAL;
 325                         goto out_err;
 326                 }
 327                 namelen = udf_put_filename(sb, dentry->d_name.name, name,
 328                                                  dentry->d_name.len);
 329                 if (!namelen) {
 330                         *err = -ENAMETOOLONG;
 331                         goto out_err;
 332                 }
 333         } else {
 334                 namelen = 0;
 335         }
 336
 337         nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
 338
 339         f_pos = udf_ext0_offset(dir);
 340
 341         fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
 342         dinfo = UDF_I(dir);
 343         if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 344                 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
 345                     &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
 346                         block = udf_get_lb_pblock(dir->i_sb,
 347                                         dinfo->i_location, 0);
 348                         fibh->soffset = fibh->eoffset = sb->s_blocksize;
 349                         goto add;
 350                 }
 351                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 352                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 353                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 354                                 epos.offset -= sizeof(short_ad);
 355                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 356                                 epos.offset -= sizeof(long_ad);
 357                 } else
 358                         offset = 0;
 359
 360                 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
 361                 if (!fibh->sbh) {
 362                         *err = -EIO;
 363                         goto out_err;
 364                 }
 365
 366                 block = dinfo->i_location.logicalBlockNum;
 367         }
 368
 369         while (f_pos < size) {
 370                 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
 371                                         &elen, &offset);
 372
 373                 if (!fi) {
 374                         *err = -EIO;
 375                         goto out_err;
 376                 }
 377
 378                 liu = le16_to_cpu(cfi->lengthOfImpUse);
 379                 lfi = cfi->lengthFileIdent;
 380
 381                 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
 382                         if (((sizeof(struct fileIdentDesc) +
 383                                         liu + lfi + 3) & ~3) == nfidlen) {
 384                                 cfi->descTag.tagSerialNum = cpu_to_le16(1);
 385                                 cfi->fileVersionNum = cpu_to_le16(1);
 386                                 cfi->fileCharacteristics = 0;
 387                                 cfi->lengthFileIdent = namelen;
 388                                 cfi->lengthOfImpUse = cpu_to_le16(0);
 389                                 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
 390                                                   name))
 391                                         goto out_ok;
 392                                 else {
 393                                         *err = -EIO;
 394                                         goto out_err;
 395                                 }
 396                         }
 397                 }
 398         }
 399
 400 add:
 401         if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 402                 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
 403                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 404                         epos.offset -= sizeof(short_ad);
 405                 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 406                         epos.offset -= sizeof(long_ad);
 407                 udf_write_aext(dir, &epos, eloc, elen, 1);
 408         }
 409         f_pos += nfidlen;
 410
 411         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
 412             sb->s_blocksize - fibh->eoffset < nfidlen) {
 413                 brelse(epos.bh);
 414                 epos.bh = NULL;
 415                 fibh->soffset -= udf_ext0_offset(dir);
 416                 fibh->eoffset -= udf_ext0_offset(dir);
 417                 f_pos -= udf_ext0_offset(dir);
 418                 if (fibh->sbh != fibh->ebh)
 419                         brelse(fibh->ebh);
 420                 brelse(fibh->sbh);
 421                 fibh->sbh = fibh->ebh =
 422                                 udf_expand_dir_adinicb(dir, &block, err);
 423                 if (!fibh->sbh)
 424                         goto out_err;
 425                 epos.block = dinfo->i_location;
 426                 epos.offset = udf_file_entry_alloc_offset(dir);
 427                 /* Load extent udf_expand_dir_adinicb() has created */
 428                 udf_current_aext(dir, &epos, &eloc, &elen, 1);
 429         }
 430
 431         if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
 432                 fibh->soffset = fibh->eoffset;
 433                 fibh->eoffset += nfidlen;
 434                 if (fibh->sbh != fibh->ebh) {
 435                         brelse(fibh->sbh);
 436                         fibh->sbh = fibh->ebh;
 437                 }
 438
 439                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
 440                         block = dinfo->i_location.logicalBlockNum;
 441                         fi = (struct fileIdentDesc *)
 442                                         (dinfo->i_ext.i_data +
 443                                          fibh->soffset -
 444                                          udf_ext0_offset(dir) +
 445                                          dinfo->i_lenEAttr);
 446                 } else {
 447                         block = eloc.logicalBlockNum +
 448                                         ((elen - 1) >>
 449                                                 dir->i_sb->s_blocksize_bits);
 450                         fi = (struct fileIdentDesc *)
 451                                 (fibh->sbh->b_data + fibh->soffset);
 452                 }
 453         } else {
 454                 fibh->soffset = fibh->eoffset - sb->s_blocksize;
 455                 fibh->eoffset += nfidlen - sb->s_blocksize;
 456                 if (fibh->sbh != fibh->ebh) {
 457                         brelse(fibh->sbh);
 458                         fibh->sbh = fibh->ebh;
 459                 }
 460
 461                 block = eloc.logicalBlockNum + ((elen - 1) >>
 462                                                 dir->i_sb->s_blocksize_bits);
 463                 fibh->ebh = udf_bread(dir,
 464                                 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
 465                 if (!fibh->ebh)
 466                         goto out_err;
 467
 468                 if (!fibh->soffset) {
 469                         if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
 470                             (EXT_RECORDED_ALLOCATED >> 30)) {
 471                                 block = eloc.logicalBlockNum + ((elen - 1) >>
 472                                         dir->i_sb->s_blocksize_bits);
 473                         } else
 474                                 block++;
 475
 476                         brelse(fibh->sbh);
 477                         fibh->sbh = fibh->ebh;
 478                         fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
 479                 } else {
 480                         fi = (struct fileIdentDesc *)
 481                                 (fibh->sbh->b_data + sb->s_blocksize +
 482                                         fibh->soffset);
 483                 }
 484         }
 485
 486         memset(cfi, 0, sizeof(struct fileIdentDesc));
 487         if (UDF_SB(sb)->s_udfrev >= 0x0200)
 488                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
 489                             sizeof(tag));
 490         else
 491                 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
 492                             sizeof(tag));
 493         cfi->fileVersionNum = cpu_to_le16(1);
 494         cfi->lengthFileIdent = namelen;
 495         cfi->lengthOfImpUse = cpu_to_le16(0);
 496         if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
 497                 dir->i_size += nfidlen;
 498                 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 499                         dinfo->i_lenAlloc += nfidlen;
 500                 mark_inode_dirty(dir);
 501                 goto out_ok;
 502         } else {
 503                 *err = -EIO;
 504                 goto out_err;
 505         }
 506
 507 out_err:
 508         fi = NULL;
 509         if (fibh->sbh != fibh->ebh)
 510                 brelse(fibh->ebh);
 511         brelse(fibh->sbh);
 512 out_ok:
 513         brelse(epos.bh);
 514         kfree(name);
 515         return fi;
 516 }
 517
 518 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
 519                             struct udf_fileident_bh *fibh,
 520                             struct fileIdentDesc *cfi)
 521 {
 522         cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
 523
 524         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
 525                 memset(&(cfi->icb), 0x00, sizeof(long_ad));
 526
 527         return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
 528 }
 529
 530 static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
 531                       struct nameidata *nd)
 532 {
 533         struct udf_fileident_bh fibh;
 534         struct inode *inode;
 535         struct fileIdentDesc cfi, *fi;
 536         int err;
 537         struct udf_inode_info *iinfo;
 538
 539         lock_kernel();
 540         inode = udf_new_inode(dir, mode, &err);
 541         if (!inode) {
 542                 unlock_kernel();
 543                 return err;
 544         }
 545
 546         iinfo = UDF_I(inode);
 547         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 548                 inode->i_data.a_ops = &udf_adinicb_aops;
 549         else
 550                 inode->i_data.a_ops = &udf_aops;
 551         inode->i_op = &udf_file_inode_operations;
 552         inode->i_fop = &udf_file_operations;
 553         inode->i_mode = mode;
 554         mark_inode_dirty(inode);
 555
 556         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 557         if (!fi) {
 558                 inode->i_nlink--;
 559                 mark_inode_dirty(inode);
 560                 iput(inode);
 561                 unlock_kernel();
 562                 return err;
 563         }
 564         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 565         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 566         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 567                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 568         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 569         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 570                 mark_inode_dirty(dir);
 571         if (fibh.sbh != fibh.ebh)
 572                 brelse(fibh.ebh);
 573         brelse(fibh.sbh);
 574         unlock_kernel();
 575         d_instantiate(dentry, inode);
 576
 577         return 0;
 578 }
 579
 580 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
 581                      dev_t rdev)
 582 {
 583         struct inode *inode;
 584         struct udf_fileident_bh fibh;
 585         struct fileIdentDesc cfi, *fi;
 586         int err;
 587         struct udf_inode_info *iinfo;
 588
 589         if (!old_valid_dev(rdev))
 590                 return -EINVAL;
 591
 592         lock_kernel();
 593         err = -EIO;
 594         inode = udf_new_inode(dir, mode, &err);
 595         if (!inode)
 596                 goto out;
 597
 598         iinfo = UDF_I(inode);
 599         inode->i_uid = current->fsuid;
 600         init_special_inode(inode, mode, rdev);
 601         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 602         if (!fi) {
 603                 inode->i_nlink--;
 604                 mark_inode_dirty(inode);
 605                 iput(inode);
 606                 unlock_kernel();
 607                 return err;
 608         }
 609         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 610         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 611         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 612                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 613         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 614         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 615                 mark_inode_dirty(dir);
 616         mark_inode_dirty(inode);
 617
 618         if (fibh.sbh != fibh.ebh)
 619                 brelse(fibh.ebh);
 620         brelse(fibh.sbh);
 621         d_instantiate(dentry, inode);
 622         err = 0;
 623
 624 out:
 625         unlock_kernel();
 626         return err;
 627 }
 628
 629 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 630 {
 631         struct inode *inode;
 632         struct udf_fileident_bh fibh;
 633         struct fileIdentDesc cfi, *fi;
 634         int err;
 635         struct udf_inode_info *dinfo = UDF_I(dir);
 636         struct udf_inode_info *iinfo;
 637
 638         lock_kernel();
 639         err = -EMLINK;
 640         if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
 641                 goto out;
 642
 643         err = -EIO;
 644         inode = udf_new_inode(dir, S_IFDIR, &err);
 645         if (!inode)
 646                 goto out;
 647
 648         iinfo = UDF_I(inode);
 649         inode->i_op = &udf_dir_inode_operations;
 650         inode->i_fop = &udf_dir_operations;
 651         fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
 652         if (!fi) {
 653                 inode->i_nlink--;
 654                 mark_inode_dirty(inode);
 655                 iput(inode);
 656                 goto out;
 657         }
 658         inode->i_nlink = 2;
 659         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 660         cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
 661         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 662                 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
 663         cfi.fileCharacteristics =
 664                         FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
 665         udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
 666         brelse(fibh.sbh);
 667         inode->i_mode = S_IFDIR | mode;
 668         if (dir->i_mode & S_ISGID)
 669                 inode->i_mode |= S_ISGID;
 670         mark_inode_dirty(inode);
 671
 672         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 673         if (!fi) {
 674                 inode->i_nlink = 0;
 675                 mark_inode_dirty(inode);
 676                 iput(inode);
 677                 goto out;
 678         }
 679         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 680         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 681         *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
 682                 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
 683         cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
 684         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
 685         inc_nlink(dir);
 686         mark_inode_dirty(dir);
 687         d_instantiate(dentry, inode);
 688         if (fibh.sbh != fibh.ebh)
 689                 brelse(fibh.ebh);
 690         brelse(fibh.sbh);
 691         err = 0;
 692
 693 out:
 694         unlock_kernel();
 695         return err;
 696 }
 697
 698 static int empty_dir(struct inode *dir)
 699 {
 700         struct fileIdentDesc *fi, cfi;
 701         struct udf_fileident_bh fibh;
 702         loff_t f_pos;
 703         loff_t size = udf_ext0_offset(dir) + dir->i_size;
 704         int block;
 705         kernel_lb_addr eloc;
 706         uint32_t elen;
 707         sector_t offset;
 708         struct extent_position epos = {};
 709         struct udf_inode_info *dinfo = UDF_I(dir);
 710
 711         f_pos = udf_ext0_offset(dir);
 712         fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
 713
 714         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 715                 fibh.sbh = fibh.ebh = NULL;
 716         else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
 717                               &epos, &eloc, &elen, &offset) ==
 718                                         (EXT_RECORDED_ALLOCATED >> 30)) {
 719                 block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
 720                 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
 721                         if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 722                                 epos.offset -= sizeof(short_ad);
 723                         else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
 724                                 epos.offset -= sizeof(long_ad);
 725                 } else
 726                         offset = 0;
 727
 728                 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
 729                 if (!fibh.sbh) {
 730                         brelse(epos.bh);
 731                         return 0;
 732                 }
 733         } else {
 734                 brelse(epos.bh);
 735                 return 0;
 736         }
 737
 738         while (f_pos < size) {
 739                 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
 740                                         &elen, &offset);
 741                 if (!fi) {
 742                         if (fibh.sbh != fibh.ebh)
 743                                 brelse(fibh.ebh);
 744                         brelse(fibh.sbh);
 745                         brelse(epos.bh);
 746                         return 0;
 747                 }
 748
 749                 if (cfi.lengthFileIdent &&
 750                     (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
 751                         if (fibh.sbh != fibh.ebh)
 752                                 brelse(fibh.ebh);
 753                         brelse(fibh.sbh);
 754                         brelse(epos.bh);
 755                         return 0;
 756                 }
 757         }
 758
 759         if (fibh.sbh != fibh.ebh)
 760                 brelse(fibh.ebh);
 761         brelse(fibh.sbh);
 762         brelse(epos.bh);
 763
 764         return 1;
 765 }
 766
 767 static int udf_rmdir(struct inode *dir, struct dentry *dentry)
 768 {
 769         int retval;
 770         struct inode *inode = dentry->d_inode;
 771         struct udf_fileident_bh fibh;
 772         struct fileIdentDesc *fi, cfi;
 773         kernel_lb_addr tloc;
 774
 775         retval = -ENOENT;
 776         lock_kernel();
 777         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
 778         if (!fi)
 779                 goto out;
 780
 781         retval = -EIO;
 782         tloc = lelb_to_cpu(cfi.icb.extLocation);
 783         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
 784                 goto end_rmdir;
 785         retval = -ENOTEMPTY;
 786         if (!empty_dir(inode))
 787                 goto end_rmdir;
 788         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
 789         if (retval)
 790                 goto end_rmdir;
 791         if (inode->i_nlink != 2)
 792                 udf_warning(inode->i_sb, "udf_rmdir",
 793                             "empty directory has nlink != 2 (%d)",
 794                             inode->i_nlink);
 795         clear_nlink(inode);
 796         inode->i_size = 0;
 797         inode_dec_link_count(dir);
 798         inode->i_ctime = dir->i_ctime = dir->i_mtime =
 799                                                 current_fs_time(dir->i_sb);
 800         mark_inode_dirty(dir);
 801
 802 end_rmdir:
 803         if (fibh.sbh != fibh.ebh)
 804                 brelse(fibh.ebh);
 805         brelse(fibh.sbh);
 806
 807 out:
 808         unlock_kernel();
 809         return retval;
 810 }
 811
 812 static int udf_unlink(struct inode *dir, struct dentry *dentry)
 813 {
 814         int retval;
 815         struct inode *inode = dentry->d_inode;
 816         struct udf_fileident_bh fibh;
 817         struct fileIdentDesc *fi;
 818         struct fileIdentDesc cfi;
 819         kernel_lb_addr tloc;
 820
 821         retval = -ENOENT;
 822         lock_kernel();
 823         fi = udf_find_entry(dir, dentry, &fibh, &cfi);
 824         if (!fi)
 825                 goto out;
 826
 827         retval = -EIO;
 828         tloc = lelb_to_cpu(cfi.icb.extLocation);
 829         if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
 830                 goto end_unlink;
 831
 832         if (!inode->i_nlink) {
 833                 udf_debug("Deleting nonexistent file (%lu), %d\n",
 834                           inode->i_ino, inode->i_nlink);
 835                 inode->i_nlink = 1;
 836         }
 837         retval = udf_delete_entry(dir, fi, &fibh, &cfi);
 838         if (retval)
 839                 goto end_unlink;
 840         dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
 841         mark_inode_dirty(dir);
 842         inode_dec_link_count(inode);
 843         inode->i_ctime = dir->i_ctime;
 844         retval = 0;
 845
 846 end_unlink:
 847         if (fibh.sbh != fibh.ebh)
 848                 brelse(fibh.ebh);
 849         brelse(fibh.sbh);
 850
 851 out:
 852         unlock_kernel();
 853         return retval;
 854 }
 855
 856 static int udf_symlink(struct inode *dir, struct dentry *dentry,
 857                        const char *symname)
 858 {
 859         struct inode *inode;
 860         struct pathComponent *pc;
 861         char *compstart;
 862         struct udf_fileident_bh fibh;
 863         struct extent_position epos = {};
 864         int eoffset, elen = 0;
 865         struct fileIdentDesc *fi;
 866         struct fileIdentDesc cfi;
 867         char *ea;
 868         int err;
 869         int block;
 870         char *name = NULL;
 871         int namelen;
 872         struct buffer_head *bh;
 873         struct udf_inode_info *iinfo;
 874
 875         lock_kernel();
 876         inode = udf_new_inode(dir, S_IFLNK, &err);
 877         if (!inode)
 878                 goto out;
 879
 880         name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
 881         if (!name) {
 882                 err = -ENOMEM;
 883                 goto out_no_entry;
 884         }
 885
 886         iinfo = UDF_I(inode);
 887         inode->i_mode = S_IFLNK | S_IRWXUGO;
 888         inode->i_data.a_ops = &udf_symlink_aops;
 889         inode->i_op = &page_symlink_inode_operations;
 890
 891         if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 892                 kernel_lb_addr eloc;
 893                 uint32_t bsize;
 894
 895                 block = udf_new_block(inode->i_sb, inode,
 896                                 iinfo->i_location.partitionReferenceNum,
 897                                 iinfo->i_location.logicalBlockNum, &err);
 898                 if (!block)
 899                         goto out_no_entry;
 900                 epos.block = iinfo->i_location;
 901                 epos.offset = udf_file_entry_alloc_offset(inode);
 902                 epos.bh = NULL;
 903                 eloc.logicalBlockNum = block;
 904                 eloc.partitionReferenceNum =
 905                                 iinfo->i_location.partitionReferenceNum;
 906                 bsize = inode->i_sb->s_blocksize;
 907                 iinfo->i_lenExtents = bsize;
 908                 udf_add_aext(inode, &epos, eloc, bsize, 0);
 909                 brelse(epos.bh);
 910
 911                 block = udf_get_pblock(inode->i_sb, block,
 912                                 iinfo->i_location.partitionReferenceNum,
 913                                 0);
 914                 epos.bh = udf_tread(inode->i_sb, block);
 915                 lock_buffer(epos.bh);
 916                 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
 917                 set_buffer_uptodate(epos.bh);
 918                 unlock_buffer(epos.bh);
 919                 mark_buffer_dirty_inode(epos.bh, inode);
 920                 ea = epos.bh->b_data + udf_ext0_offset(inode);
 921         } else
 922                 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
 923
 924         eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
 925         pc = (struct pathComponent *)ea;
 926
 927         if (*symname == '/') {
 928                 do {
 929                         symname++;
 930                 } while (*symname == '/');
 931
 932                 pc->componentType = 1;
 933                 pc->lengthComponentIdent = 0;
 934                 pc->componentFileVersionNum = 0;
 935                 pc += sizeof(struct pathComponent);
 936                 elen += sizeof(struct pathComponent);
 937         }
 938
 939         err = -ENAMETOOLONG;
 940
 941         while (*symname) {
 942                 if (elen + sizeof(struct pathComponent) > eoffset)
 943                         goto out_no_entry;
 944
 945                 pc = (struct pathComponent *)(ea + elen);
 946
 947                 compstart = (char *)symname;
 948
 949                 do {
 950                         symname++;
 951                 } while (*symname && *symname != '/');
 952
 953                 pc->componentType = 5;
 954                 pc->lengthComponentIdent = 0;
 955                 pc->componentFileVersionNum = 0;
 956                 if (compstart[0] == '.') {
 957                         if ((symname - compstart) == 1)
 958                                 pc->componentType = 4;
 959                         else if ((symname - compstart) == 2 &&
 960                                         compstart[1] == '.')
 961                                 pc->componentType = 3;
 962                 }
 963
 964                 if (pc->componentType == 5) {
 965                         namelen = udf_put_filename(inode->i_sb, compstart, name,
 966                                                    symname - compstart);
 967                         if (!namelen)
 968                                 goto out_no_entry;
 969
 970                         if (elen + sizeof(struct pathComponent) + namelen >
 971                                         eoffset)
 972                                 goto out_no_entry;
 973                         else
 974                                 pc->lengthComponentIdent = namelen;
 975
 976                         memcpy(pc->componentIdent, name, namelen);
 977                 }
 978
 979                 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
 980
 981                 if (*symname) {
 982                         do {
 983                                 symname++;
 984                         } while (*symname == '/');
 985                 }
 986         }
 987
 988         brelse(epos.bh);
 989         inode->i_size = elen;
 990         if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
 991                 iinfo->i_lenAlloc = inode->i_size;
 992         mark_inode_dirty(inode);
 993
 994         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
 995         if (!fi)
 996                 goto out_no_entry;
 997         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
 998         cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
 999         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1000         if (bh) {
1001                 struct logicalVolIntegrityDesc *lvid =
1002                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1003                 struct logicalVolHeaderDesc *lvhd;
1004                 uint64_t uniqueID;
1005                 lvhd = (struct logicalVolHeaderDesc *)
1006                                 lvid->logicalVolContentsUse;
1007                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1008                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1009                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1010                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1011                         uniqueID += 16;
1012                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1013                 mark_buffer_dirty(bh);
1014         }
1015         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1016         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1017                 mark_inode_dirty(dir);
1018         if (fibh.sbh != fibh.ebh)
1019                 brelse(fibh.ebh);
1020         brelse(fibh.sbh);
1021         d_instantiate(dentry, inode);
1022         err = 0;
1023
1024 out:
1025         kfree(name);
1026         unlock_kernel();
1027         return err;
1028
1029 out_no_entry:
1030         inode_dec_link_count(inode);
1031         iput(inode);
1032         goto out;
1033 }
1034
1035 static int udf_link(struct dentry *old_dentry, struct inode *dir,
1036                     struct dentry *dentry)
1037 {
1038         struct inode *inode = old_dentry->d_inode;
1039         struct udf_fileident_bh fibh;
1040         struct fileIdentDesc cfi, *fi;
1041         int err;
1042         struct buffer_head *bh;
1043
1044         lock_kernel();
1045         if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
1046                 unlock_kernel();
1047                 return -EMLINK;
1048         }
1049
1050         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1051         if (!fi) {
1052                 unlock_kernel();
1053                 return err;
1054         }
1055         cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
1056         cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
1057         bh = UDF_SB(inode->i_sb)->s_lvid_bh;
1058         if (bh) {
1059                 struct logicalVolIntegrityDesc *lvid =
1060                                 (struct logicalVolIntegrityDesc *)bh->b_data;
1061                 struct logicalVolHeaderDesc *lvhd;
1062                 uint64_t uniqueID;
1063                 lvhd = (struct logicalVolHeaderDesc *)
1064                                 (lvid->logicalVolContentsUse);
1065                 uniqueID = le64_to_cpu(lvhd->uniqueID);
1066                 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
1067                         cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
1068                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
1069                         uniqueID += 16;
1070                 lvhd->uniqueID = cpu_to_le64(uniqueID);
1071                 mark_buffer_dirty(bh);
1072         }
1073         udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
1074         if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1075                 mark_inode_dirty(dir);
1076
1077         if (fibh.sbh != fibh.ebh)
1078                 brelse(fibh.ebh);
1079         brelse(fibh.sbh);
1080         inc_nlink(inode);
1081         inode->i_ctime = current_fs_time(inode->i_sb);
1082         mark_inode_dirty(inode);
1083         atomic_inc(&inode->i_count);
1084         d_instantiate(dentry, inode);
1085         unlock_kernel();
1086
1087         return 0;
1088 }
1089
1090 /* Anybody can rename anything with this: the permission checks are left to the
1091  * higher-level routines.
1092  */
1093 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1094                       struct inode *new_dir, struct dentry *new_dentry)
1095 {
1096         struct inode *old_inode = old_dentry->d_inode;
1097         struct inode *new_inode = new_dentry->d_inode;
1098         struct udf_fileident_bh ofibh, nfibh;
1099         struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1100         struct fileIdentDesc ocfi, ncfi;
1101         struct buffer_head *dir_bh = NULL;
1102         int retval = -ENOENT;
1103         kernel_lb_addr tloc;
1104         struct udf_inode_info *old_iinfo = UDF_I(old_inode);
1105
1106         lock_kernel();
1107         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1108         if (ofi) {
1109                 if (ofibh.sbh != ofibh.ebh)
1110                         brelse(ofibh.ebh);
1111                 brelse(ofibh.sbh);
1112         }
1113         tloc = lelb_to_cpu(ocfi.icb.extLocation);
1114         if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
1115             != old_inode->i_ino)
1116                 goto end_rename;
1117
1118         nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
1119         if (nfi) {
1120                 if (!new_inode) {
1121                         if (nfibh.sbh != nfibh.ebh)
1122                                 brelse(nfibh.ebh);
1123                         brelse(nfibh.sbh);
1124                         nfi = NULL;
1125                 }
1126         }
1127         if (S_ISDIR(old_inode->i_mode)) {
1128                 int offset = udf_ext0_offset(old_inode);
1129
1130                 if (new_inode) {
1131                         retval = -ENOTEMPTY;
1132                         if (!empty_dir(new_inode))
1133                                 goto end_rename;
1134                 }
1135                 retval = -EIO;
1136                 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1137                         dir_fi = udf_get_fileident(
1138                                         old_iinfo->i_ext.i_data -
1139                                           (old_iinfo->i_efe ?
1140                                            sizeof(struct extendedFileEntry) :
1141                                            sizeof(struct fileEntry)),
1142                                         old_inode->i_sb->s_blocksize, &offset);
1143                 } else {
1144                         dir_bh = udf_bread(old_inode, 0, 0, &retval);
1145                         if (!dir_bh)
1146                                 goto end_rename;
1147                         dir_fi = udf_get_fileident(dir_bh->b_data,
1148                                         old_inode->i_sb->s_blocksize, &offset);
1149                 }
1150                 if (!dir_fi)
1151                         goto end_rename;
1152                 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
1153                 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) !=
1154                                 old_dir->i_ino)
1155                         goto end_rename;
1156
1157                 retval = -EMLINK;
1158                 if (!new_inode &&
1159                         new_dir->i_nlink >=
1160                                 (256 << sizeof(new_dir->i_nlink)) - 1)
1161                         goto end_rename;
1162         }
1163         if (!nfi) {
1164                 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1165                                     &retval);
1166                 if (!nfi)
1167                         goto end_rename;
1168         }
1169
1170         /*
1171          * Like most other Unix systems, set the ctime for inodes on a
1172          * rename.
1173          */
1174         old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1175         mark_inode_dirty(old_inode);
1176
1177         /*
1178          * ok, that's it
1179          */
1180         ncfi.fileVersionNum = ocfi.fileVersionNum;
1181         ncfi.fileCharacteristics = ocfi.fileCharacteristics;
1182         memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
1183         udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1184
1185         /* The old fid may have moved - find it again */
1186         ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
1187         udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1188
1189         if (new_inode) {
1190                 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
1191                 inode_dec_link_count(new_inode);
1192         }
1193         old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1194         mark_inode_dirty(old_dir);
1195
1196         if (dir_fi) {
1197                 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
1198                 udf_update_tag((char *)dir_fi,
1199                                 (sizeof(struct fileIdentDesc) +
1200                                 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
1201                 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1202                         mark_inode_dirty(old_inode);
1203                 else
1204                         mark_buffer_dirty_inode(dir_bh, old_inode);
1205
1206                 inode_dec_link_count(old_dir);
1207                 if (new_inode)
1208                         inode_dec_link_count(new_inode);
1209                 else {
1210                         inc_nlink(new_dir);
1211                         mark_inode_dirty(new_dir);
1212                 }
1213         }
1214
1215         if (ofi) {
1216                 if (ofibh.sbh != ofibh.ebh)
1217                         brelse(ofibh.ebh);
1218                 brelse(ofibh.sbh);
1219         }
1220
1221         retval = 0;
1222
1223 end_rename:
1224         brelse(dir_bh);
1225         if (nfi) {
1226                 if (nfibh.sbh != nfibh.ebh)
1227                         brelse(nfibh.ebh);
1228                 brelse(nfibh.sbh);
1229         }
1230         unlock_kernel();
1231
1232         return retval;
1233 }
1234
1235 const struct inode_operations udf_dir_inode_operations = {
1236         .lookup                         = udf_lookup,
1237         .create                         = udf_create,
1238         .link                           = udf_link,
1239         .unlink                         = udf_unlink,
1240         .symlink                        = udf_symlink,
1241         .mkdir                          = udf_mkdir,
1242         .rmdir                          = udf_rmdir,
1243         .mknod                          = udf_mknod,
1244         .rename                         = udf_rename,
1245 };