1 /* 2 * namei.c 3 * 4 * PURPOSE 5 * Inode name handling routines for the OSTA-UDF(tm) filesystem. 6 * 7 * COPYRIGHT 8 * This file is distributed under the terms of the GNU General Public 9 * License (GPL). Copies of the GPL can be obtained from: 10 * ftp://prep.ai.mit.edu/pub/gnu/GPL 11 * Each contributing author retains all rights to their own work. 12 * 13 * (C) 1998-2004 Ben Fennema 14 * (C) 1999-2000 Stelias Computing Inc 15 * 16 * HISTORY 17 * 18 * 12/12/98 blf Created. Split out the lookup code from dir.c 19 * 04/19/99 blf link, mknod, symlink support 20 */ 21 22 #include "udfdecl.h" 23 24 #include "udf_i.h" 25 #include "udf_sb.h" 26 #include <linux/string.h> 27 #include <linux/errno.h> 28 #include <linux/mm.h> 29 #include <linux/slab.h> 30 #include <linux/quotaops.h> 31 #include <linux/smp_lock.h> 32 #include <linux/buffer_head.h> 33 #include <linux/sched.h> 34 35 static inline int udf_match(int len1, const char *name1, int len2, 36 const char *name2) 37 { 38 if (len1 != len2) 39 return 0; 40 41 return !memcmp(name1, name2, len1); 42 } 43 44 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, 45 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, 46 uint8_t *impuse, uint8_t *fileident) 47 { 48 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); 49 uint16_t crc; 50 int offset; 51 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); 52 uint8_t lfi = cfi->lengthFileIdent; 53 int padlen = fibh->eoffset - fibh->soffset - liu - lfi - 54 sizeof(struct fileIdentDesc); 55 int adinicb = 0; 56 57 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 58 adinicb = 1; 59 60 offset = fibh->soffset + sizeof(struct fileIdentDesc); 61 62 if (impuse) { 63 if (adinicb || (offset + liu < 0)) { 64 memcpy((uint8_t *)sfi->impUse, impuse, liu); 65 } else if (offset >= 0) { 66 memcpy(fibh->ebh->b_data + offset, impuse, liu); 67 } else { 68 memcpy((uint8_t *)sfi->impUse, impuse, -offset); 69 memcpy(fibh->ebh->b_data, impuse - offset, 70 liu + offset); 71 } 72 } 73 74 offset += liu; 75 76 if (fileident) { 77 if (adinicb || (offset + lfi < 0)) { 78 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); 79 } else if (offset >= 0) { 80 memcpy(fibh->ebh->b_data + offset, fileident, lfi); 81 } else { 82 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, 83 -offset); 84 memcpy(fibh->ebh->b_data, fileident - offset, 85 lfi + offset); 86 } 87 } 88 89 offset += lfi; 90 91 if (adinicb || (offset + padlen < 0)) { 92 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); 93 } else if (offset >= 0) { 94 memset(fibh->ebh->b_data + offset, 0x00, padlen); 95 } else { 96 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); 97 memset(fibh->ebh->b_data, 0x00, padlen + offset); 98 } 99 100 crc = udf_crc((uint8_t *)cfi + sizeof(tag), 101 sizeof(struct fileIdentDesc) - sizeof(tag), 0); 102 103 if (fibh->sbh == fibh->ebh) { 104 crc = udf_crc((uint8_t *)sfi->impUse, 105 crclen + sizeof(tag) - 106 sizeof(struct fileIdentDesc), crc); 107 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { 108 crc = udf_crc(fibh->ebh->b_data + 109 sizeof(struct fileIdentDesc) + 110 fibh->soffset, 111 crclen + sizeof(tag) - 112 sizeof(struct fileIdentDesc), 113 crc); 114 } else { 115 crc = udf_crc((uint8_t *)sfi->impUse, 116 -fibh->soffset - sizeof(struct fileIdentDesc), 117 crc); 118 crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); 119 } 120 121 cfi->descTag.descCRC = cpu_to_le16(crc); 122 cfi->descTag.descCRCLength = cpu_to_le16(crclen); 123 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); 124 125 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { 126 memcpy((uint8_t *)sfi, (uint8_t *)cfi, 127 sizeof(struct fileIdentDesc)); 128 } else { 129 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); 130 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, 131 sizeof(struct fileIdentDesc) + fibh->soffset); 132 } 133 134 if (adinicb) { 135 mark_inode_dirty(inode); 136 } else { 137 if (fibh->sbh != fibh->ebh) 138 mark_buffer_dirty_inode(fibh->ebh, inode); 139 mark_buffer_dirty_inode(fibh->sbh, inode); 140 } 141 return 0; 142 } 143 144 static struct fileIdentDesc *udf_find_entry(struct inode *dir, 145 struct dentry *dentry, 146 struct udf_fileident_bh *fibh, 147 struct fileIdentDesc *cfi) 148 { 149 struct fileIdentDesc *fi = NULL; 150 loff_t f_pos; 151 int block, flen; 152 char fname[UDF_NAME_LEN]; 153 char *nameptr; 154 uint8_t lfi; 155 uint16_t liu; 156 loff_t size; 157 kernel_lb_addr eloc; 158 uint32_t elen; 159 sector_t offset; 160 struct extent_position epos = {}; 161 struct udf_inode_info *dinfo = UDF_I(dir); 162 163 size = (udf_ext0_offset(dir) + dir->i_size) >> 2; 164 f_pos = (udf_ext0_offset(dir) >> 2); 165 166 fibh->soffset = fibh->eoffset = 167 (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; 168 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 169 fibh->sbh = fibh->ebh = NULL; 170 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 171 &epos, &eloc, &elen, &offset) == 172 (EXT_RECORDED_ALLOCATED >> 30)) { 173 block = udf_get_lb_pblock(dir->i_sb, eloc, offset); 174 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { 175 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 176 epos.offset -= sizeof(short_ad); 177 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 178 epos.offset -= sizeof(long_ad); 179 } else 180 offset = 0; 181 182 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); 183 if (!fibh->sbh) { 184 brelse(epos.bh); 185 return NULL; 186 } 187 } else { 188 brelse(epos.bh); 189 return NULL; 190 } 191 192 while ((f_pos < size)) { 193 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, 194 &elen, &offset); 195 if (!fi) { 196 if (fibh->sbh != fibh->ebh) 197 brelse(fibh->ebh); 198 brelse(fibh->sbh); 199 brelse(epos.bh); 200 return NULL; 201 } 202 203 liu = le16_to_cpu(cfi->lengthOfImpUse); 204 lfi = cfi->lengthFileIdent; 205 206 if (fibh->sbh == fibh->ebh) { 207 nameptr = fi->fileIdent + liu; 208 } else { 209 int poffset; /* Unpaded ending offset */ 210 211 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + 212 liu + lfi; 213 214 if (poffset >= lfi) 215 nameptr = (uint8_t *)(fibh->ebh->b_data + 216 poffset - lfi); 217 else { 218 nameptr = fname; 219 memcpy(nameptr, fi->fileIdent + liu, 220 lfi - poffset); 221 memcpy(nameptr + lfi - poffset, 222 fibh->ebh->b_data, poffset); 223 } 224 } 225 226 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { 227 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) 228 continue; 229 } 230 231 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { 232 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) 233 continue; 234 } 235 236 if (!lfi) 237 continue; 238 239 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); 240 if (flen && udf_match(flen, fname, dentry->d_name.len, 241 dentry->d_name.name)) { 242 brelse(epos.bh); 243 return fi; 244 } 245 } 246 247 if (fibh->sbh != fibh->ebh) 248 brelse(fibh->ebh); 249 brelse(fibh->sbh); 250 brelse(epos.bh); 251 252 return NULL; 253 } 254 255 /* 256 * udf_lookup 257 * 258 * PURPOSE 259 * Look-up the inode for a given name. 260 * 261 * DESCRIPTION 262 * Required - lookup_dentry() will return -ENOTDIR if this routine is not 263 * available for a directory. The filesystem is useless if this routine is 264 * not available for at least the filesystem's root directory. 265 * 266 * This routine is passed an incomplete dentry - it must be completed by 267 * calling d_add(dentry, inode). If the name does not exist, then the 268 * specified inode must be set to null. An error should only be returned 269 * when the lookup fails for a reason other than the name not existing. 270 * Note that the directory inode semaphore is held during the call. 271 * 272 * Refer to lookup_dentry() in fs/namei.c 273 * lookup_dentry() -> lookup() -> real_lookup() -> . 274 * 275 * PRE-CONDITIONS 276 * dir Pointer to inode of parent directory. 277 * dentry Pointer to dentry to complete. 278 * nd Pointer to lookup nameidata 279 * 280 * POST-CONDITIONS 281 * <return> Zero on success. 282 * 283 * HISTORY 284 * July 1, 1997 - Andrew E. Mileski 285 * Written, tested, and released. 286 */ 287 288 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, 289 struct nameidata *nd) 290 { 291 struct inode *inode = NULL; 292 struct fileIdentDesc cfi; 293 struct udf_fileident_bh fibh; 294 295 if (dentry->d_name.len > UDF_NAME_LEN - 2) 296 return ERR_PTR(-ENAMETOOLONG); 297 298 lock_kernel(); 299 #ifdef UDF_RECOVERY 300 /* temporary shorthand for specifying files by inode number */ 301 if (!strncmp(dentry->d_name.name, ".B=", 3)) { 302 kernel_lb_addr lb = { 303 .logicalBlockNum = 0, 304 .partitionReferenceNum = 305 simple_strtoul(dentry->d_name.name + 3, 306 NULL, 0), 307 }; 308 inode = udf_iget(dir->i_sb, lb); 309 if (!inode) { 310 unlock_kernel(); 311 return ERR_PTR(-EACCES); 312 } 313 } else 314 #endif /* UDF_RECOVERY */ 315 316 if (udf_find_entry(dir, dentry, &fibh, &cfi)) { 317 if (fibh.sbh != fibh.ebh) 318 brelse(fibh.ebh); 319 brelse(fibh.sbh); 320 321 inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); 322 if (!inode) { 323 unlock_kernel(); 324 return ERR_PTR(-EACCES); 325 } 326 } 327 unlock_kernel(); 328 d_add(dentry, inode); 329 330 return NULL; 331 } 332 333 static struct fileIdentDesc *udf_add_entry(struct inode *dir, 334 struct dentry *dentry, 335 struct udf_fileident_bh *fibh, 336 struct fileIdentDesc *cfi, int *err) 337 { 338 struct super_block *sb = dir->i_sb; 339 struct fileIdentDesc *fi = NULL; 340 char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; 341 int namelen; 342 loff_t f_pos; 343 int flen; 344 char *nameptr; 345 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; 346 int nfidlen; 347 uint8_t lfi; 348 uint16_t liu; 349 int block; 350 kernel_lb_addr eloc; 351 uint32_t elen; 352 sector_t offset; 353 struct extent_position epos = {}; 354 struct udf_inode_info *dinfo; 355 356 if (dentry) { 357 if (!dentry->d_name.len) { 358 *err = -EINVAL; 359 return NULL; 360 } 361 namelen = udf_put_filename(sb, dentry->d_name.name, name, 362 dentry->d_name.len); 363 if (!namelen) { 364 *err = -ENAMETOOLONG; 365 return NULL; 366 } 367 } else { 368 namelen = 0; 369 } 370 371 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; 372 373 f_pos = (udf_ext0_offset(dir) >> 2); 374 375 fibh->soffset = fibh->eoffset = 376 (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; 377 dinfo = UDF_I(dir); 378 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 379 fibh->sbh = fibh->ebh = NULL; 380 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 381 &epos, &eloc, &elen, &offset) == 382 (EXT_RECORDED_ALLOCATED >> 30)) { 383 block = udf_get_lb_pblock(dir->i_sb, eloc, offset); 384 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { 385 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 386 epos.offset -= sizeof(short_ad); 387 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 388 epos.offset -= sizeof(long_ad); 389 } else 390 offset = 0; 391 392 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); 393 if (!fibh->sbh) { 394 brelse(epos.bh); 395 *err = -EIO; 396 return NULL; 397 } 398 399 block = dinfo->i_location.logicalBlockNum; 400 401 } else { 402 block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0); 403 fibh->sbh = fibh->ebh = NULL; 404 fibh->soffset = fibh->eoffset = sb->s_blocksize; 405 goto add; 406 } 407 408 while ((f_pos < size)) { 409 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, 410 &elen, &offset); 411 412 if (!fi) { 413 if (fibh->sbh != fibh->ebh) 414 brelse(fibh->ebh); 415 brelse(fibh->sbh); 416 brelse(epos.bh); 417 *err = -EIO; 418 return NULL; 419 } 420 421 liu = le16_to_cpu(cfi->lengthOfImpUse); 422 lfi = cfi->lengthFileIdent; 423 424 if (fibh->sbh == fibh->ebh) 425 nameptr = fi->fileIdent + liu; 426 else { 427 int poffset; /* Unpaded ending offset */ 428 429 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + 430 liu + lfi; 431 432 if (poffset >= lfi) 433 nameptr = (char *)(fibh->ebh->b_data + 434 poffset - lfi); 435 else { 436 nameptr = fname; 437 memcpy(nameptr, fi->fileIdent + liu, 438 lfi - poffset); 439 memcpy(nameptr + lfi - poffset, 440 fibh->ebh->b_data, poffset); 441 } 442 } 443 444 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { 445 if (((sizeof(struct fileIdentDesc) + 446 liu + lfi + 3) & ~3) == nfidlen) { 447 brelse(epos.bh); 448 cfi->descTag.tagSerialNum = cpu_to_le16(1); 449 cfi->fileVersionNum = cpu_to_le16(1); 450 cfi->fileCharacteristics = 0; 451 cfi->lengthFileIdent = namelen; 452 cfi->lengthOfImpUse = cpu_to_le16(0); 453 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, 454 name)) 455 return fi; 456 else { 457 *err = -EIO; 458 return NULL; 459 } 460 } 461 } 462 463 if (!lfi || !dentry) 464 continue; 465 466 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); 467 if (flen && udf_match(flen, fname, dentry->d_name.len, 468 dentry->d_name.name)) { 469 if (fibh->sbh != fibh->ebh) 470 brelse(fibh->ebh); 471 brelse(fibh->sbh); 472 brelse(epos.bh); 473 *err = -EEXIST; 474 return NULL; 475 } 476 } 477 478 add: 479 f_pos += nfidlen; 480 481 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && 482 sb->s_blocksize - fibh->eoffset < nfidlen) { 483 brelse(epos.bh); 484 epos.bh = NULL; 485 fibh->soffset -= udf_ext0_offset(dir); 486 fibh->eoffset -= udf_ext0_offset(dir); 487 f_pos -= (udf_ext0_offset(dir) >> 2); 488 if (fibh->sbh != fibh->ebh) 489 brelse(fibh->ebh); 490 brelse(fibh->sbh); 491 fibh->sbh = fibh->ebh = 492 udf_expand_dir_adinicb(dir, &block, err); 493 if (!fibh->sbh) 494 return NULL; 495 epos.block = dinfo->i_location; 496 eloc.logicalBlockNum = block; 497 eloc.partitionReferenceNum = 498 dinfo->i_location.partitionReferenceNum; 499 elen = dir->i_sb->s_blocksize; 500 epos.offset = udf_file_entry_alloc_offset(dir); 501 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 502 epos.offset += sizeof(short_ad); 503 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 504 epos.offset += sizeof(long_ad); 505 } 506 507 if (sb->s_blocksize - fibh->eoffset >= nfidlen) { 508 fibh->soffset = fibh->eoffset; 509 fibh->eoffset += nfidlen; 510 if (fibh->sbh != fibh->ebh) { 511 brelse(fibh->sbh); 512 fibh->sbh = fibh->ebh; 513 } 514 515 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 516 block = dinfo->i_location.logicalBlockNum; 517 fi = (struct fileIdentDesc *) 518 (dinfo->i_ext.i_data + 519 fibh->soffset - 520 udf_ext0_offset(dir) + 521 dinfo->i_lenEAttr); 522 } else { 523 block = eloc.logicalBlockNum + 524 ((elen - 1) >> 525 dir->i_sb->s_blocksize_bits); 526 fi = (struct fileIdentDesc *) 527 (fibh->sbh->b_data + fibh->soffset); 528 } 529 } else { 530 fibh->soffset = fibh->eoffset - sb->s_blocksize; 531 fibh->eoffset += nfidlen - sb->s_blocksize; 532 if (fibh->sbh != fibh->ebh) { 533 brelse(fibh->sbh); 534 fibh->sbh = fibh->ebh; 535 } 536 537 block = eloc.logicalBlockNum + ((elen - 1) >> 538 dir->i_sb->s_blocksize_bits); 539 fibh->ebh = udf_bread(dir, 540 f_pos >> (dir->i_sb->s_blocksize_bits - 2), 541 1, err); 542 if (!fibh->ebh) { 543 brelse(epos.bh); 544 brelse(fibh->sbh); 545 return NULL; 546 } 547 548 if (!fibh->soffset) { 549 if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == 550 (EXT_RECORDED_ALLOCATED >> 30)) { 551 block = eloc.logicalBlockNum + ((elen - 1) >> 552 dir->i_sb->s_blocksize_bits); 553 } else 554 block++; 555 556 brelse(fibh->sbh); 557 fibh->sbh = fibh->ebh; 558 fi = (struct fileIdentDesc *)(fibh->sbh->b_data); 559 } else { 560 fi = (struct fileIdentDesc *) 561 (fibh->sbh->b_data + sb->s_blocksize + 562 fibh->soffset); 563 } 564 } 565 566 memset(cfi, 0, sizeof(struct fileIdentDesc)); 567 if (UDF_SB(sb)->s_udfrev >= 0x0200) 568 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, 569 sizeof(tag)); 570 else 571 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, 572 sizeof(tag)); 573 cfi->fileVersionNum = cpu_to_le16(1); 574 cfi->lengthFileIdent = namelen; 575 cfi->lengthOfImpUse = cpu_to_le16(0); 576 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { 577 brelse(epos.bh); 578 dir->i_size += nfidlen; 579 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 580 dinfo->i_lenAlloc += nfidlen; 581 mark_inode_dirty(dir); 582 return fi; 583 } else { 584 brelse(epos.bh); 585 if (fibh->sbh != fibh->ebh) 586 brelse(fibh->ebh); 587 brelse(fibh->sbh); 588 *err = -EIO; 589 return NULL; 590 } 591 } 592 593 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, 594 struct udf_fileident_bh *fibh, 595 struct fileIdentDesc *cfi) 596 { 597 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; 598 599 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) 600 memset(&(cfi->icb), 0x00, sizeof(long_ad)); 601 602 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); 603 } 604 605 static int udf_create(struct inode *dir, struct dentry *dentry, int mode, 606 struct nameidata *nd) 607 { 608 struct udf_fileident_bh fibh; 609 struct inode *inode; 610 struct fileIdentDesc cfi, *fi; 611 int err; 612 struct udf_inode_info *iinfo; 613 614 lock_kernel(); 615 inode = udf_new_inode(dir, mode, &err); 616 if (!inode) { 617 unlock_kernel(); 618 return err; 619 } 620 621 iinfo = UDF_I(inode); 622 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 623 inode->i_data.a_ops = &udf_adinicb_aops; 624 else 625 inode->i_data.a_ops = &udf_aops; 626 inode->i_op = &udf_file_inode_operations; 627 inode->i_fop = &udf_file_operations; 628 inode->i_mode = mode; 629 mark_inode_dirty(inode); 630 631 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 632 if (!fi) { 633 inode->i_nlink--; 634 mark_inode_dirty(inode); 635 iput(inode); 636 unlock_kernel(); 637 return err; 638 } 639 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 640 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 641 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 642 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); 643 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 644 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 645 mark_inode_dirty(dir); 646 if (fibh.sbh != fibh.ebh) 647 brelse(fibh.ebh); 648 brelse(fibh.sbh); 649 unlock_kernel(); 650 d_instantiate(dentry, inode); 651 652 return 0; 653 } 654 655 static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, 656 dev_t rdev) 657 { 658 struct inode *inode; 659 struct udf_fileident_bh fibh; 660 struct fileIdentDesc cfi, *fi; 661 int err; 662 struct udf_inode_info *iinfo; 663 664 if (!old_valid_dev(rdev)) 665 return -EINVAL; 666 667 lock_kernel(); 668 err = -EIO; 669 inode = udf_new_inode(dir, mode, &err); 670 if (!inode) 671 goto out; 672 673 iinfo = UDF_I(inode); 674 inode->i_uid = current->fsuid; 675 init_special_inode(inode, mode, rdev); 676 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 677 if (!fi) { 678 inode->i_nlink--; 679 mark_inode_dirty(inode); 680 iput(inode); 681 unlock_kernel(); 682 return err; 683 } 684 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 685 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 686 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 687 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); 688 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 689 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 690 mark_inode_dirty(dir); 691 mark_inode_dirty(inode); 692 693 if (fibh.sbh != fibh.ebh) 694 brelse(fibh.ebh); 695 brelse(fibh.sbh); 696 d_instantiate(dentry, inode); 697 err = 0; 698 699 out: 700 unlock_kernel(); 701 return err; 702 } 703 704 static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) 705 { 706 struct inode *inode; 707 struct udf_fileident_bh fibh; 708 struct fileIdentDesc cfi, *fi; 709 int err; 710 struct udf_inode_info *dinfo = UDF_I(dir); 711 struct udf_inode_info *iinfo; 712 713 lock_kernel(); 714 err = -EMLINK; 715 if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) 716 goto out; 717 718 err = -EIO; 719 inode = udf_new_inode(dir, S_IFDIR, &err); 720 if (!inode) 721 goto out; 722 723 iinfo = UDF_I(inode); 724 inode->i_op = &udf_dir_inode_operations; 725 inode->i_fop = &udf_dir_operations; 726 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); 727 if (!fi) { 728 inode->i_nlink--; 729 mark_inode_dirty(inode); 730 iput(inode); 731 goto out; 732 } 733 inode->i_nlink = 2; 734 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 735 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); 736 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 737 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); 738 cfi.fileCharacteristics = 739 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; 740 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); 741 brelse(fibh.sbh); 742 inode->i_mode = S_IFDIR | mode; 743 if (dir->i_mode & S_ISGID) 744 inode->i_mode |= S_ISGID; 745 mark_inode_dirty(inode); 746 747 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 748 if (!fi) { 749 inode->i_nlink = 0; 750 mark_inode_dirty(inode); 751 iput(inode); 752 goto out; 753 } 754 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 755 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 756 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 757 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); 758 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; 759 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 760 inc_nlink(dir); 761 mark_inode_dirty(dir); 762 d_instantiate(dentry, inode); 763 if (fibh.sbh != fibh.ebh) 764 brelse(fibh.ebh); 765 brelse(fibh.sbh); 766 err = 0; 767 768 out: 769 unlock_kernel(); 770 return err; 771 } 772 773 static int empty_dir(struct inode *dir) 774 { 775 struct fileIdentDesc *fi, cfi; 776 struct udf_fileident_bh fibh; 777 loff_t f_pos; 778 loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; 779 int block; 780 kernel_lb_addr eloc; 781 uint32_t elen; 782 sector_t offset; 783 struct extent_position epos = {}; 784 struct udf_inode_info *dinfo = UDF_I(dir); 785 786 f_pos = (udf_ext0_offset(dir) >> 2); 787 788 fibh.soffset = fibh.eoffset = 789 (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; 790 791 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 792 fibh.sbh = fibh.ebh = NULL; 793 else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 794 &epos, &eloc, &elen, &offset) == 795 (EXT_RECORDED_ALLOCATED >> 30)) { 796 block = udf_get_lb_pblock(dir->i_sb, eloc, offset); 797 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { 798 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 799 epos.offset -= sizeof(short_ad); 800 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 801 epos.offset -= sizeof(long_ad); 802 } else 803 offset = 0; 804 805 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); 806 if (!fibh.sbh) { 807 brelse(epos.bh); 808 return 0; 809 } 810 } else { 811 brelse(epos.bh); 812 return 0; 813 } 814 815 while ((f_pos < size)) { 816 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, 817 &elen, &offset); 818 if (!fi) { 819 if (fibh.sbh != fibh.ebh) 820 brelse(fibh.ebh); 821 brelse(fibh.sbh); 822 brelse(epos.bh); 823 return 0; 824 } 825 826 if (cfi.lengthFileIdent && 827 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { 828 if (fibh.sbh != fibh.ebh) 829 brelse(fibh.ebh); 830 brelse(fibh.sbh); 831 brelse(epos.bh); 832 return 0; 833 } 834 } 835 836 if (fibh.sbh != fibh.ebh) 837 brelse(fibh.ebh); 838 brelse(fibh.sbh); 839 brelse(epos.bh); 840 841 return 1; 842 } 843 844 static int udf_rmdir(struct inode *dir, struct dentry *dentry) 845 { 846 int retval; 847 struct inode *inode = dentry->d_inode; 848 struct udf_fileident_bh fibh; 849 struct fileIdentDesc *fi, cfi; 850 kernel_lb_addr tloc; 851 852 retval = -ENOENT; 853 lock_kernel(); 854 fi = udf_find_entry(dir, dentry, &fibh, &cfi); 855 if (!fi) 856 goto out; 857 858 retval = -EIO; 859 tloc = lelb_to_cpu(cfi.icb.extLocation); 860 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) 861 goto end_rmdir; 862 retval = -ENOTEMPTY; 863 if (!empty_dir(inode)) 864 goto end_rmdir; 865 retval = udf_delete_entry(dir, fi, &fibh, &cfi); 866 if (retval) 867 goto end_rmdir; 868 if (inode->i_nlink != 2) 869 udf_warning(inode->i_sb, "udf_rmdir", 870 "empty directory has nlink != 2 (%d)", 871 inode->i_nlink); 872 clear_nlink(inode); 873 inode->i_size = 0; 874 inode_dec_link_count(dir); 875 inode->i_ctime = dir->i_ctime = dir->i_mtime = 876 current_fs_time(dir->i_sb); 877 mark_inode_dirty(dir); 878 879 end_rmdir: 880 if (fibh.sbh != fibh.ebh) 881 brelse(fibh.ebh); 882 brelse(fibh.sbh); 883 884 out: 885 unlock_kernel(); 886 return retval; 887 } 888 889 static int udf_unlink(struct inode *dir, struct dentry *dentry) 890 { 891 int retval; 892 struct inode *inode = dentry->d_inode; 893 struct udf_fileident_bh fibh; 894 struct fileIdentDesc *fi; 895 struct fileIdentDesc cfi; 896 kernel_lb_addr tloc; 897 898 retval = -ENOENT; 899 lock_kernel(); 900 fi = udf_find_entry(dir, dentry, &fibh, &cfi); 901 if (!fi) 902 goto out; 903 904 retval = -EIO; 905 tloc = lelb_to_cpu(cfi.icb.extLocation); 906 if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) 907 goto end_unlink; 908 909 if (!inode->i_nlink) { 910 udf_debug("Deleting nonexistent file (%lu), %d\n", 911 inode->i_ino, inode->i_nlink); 912 inode->i_nlink = 1; 913 } 914 retval = udf_delete_entry(dir, fi, &fibh, &cfi); 915 if (retval) 916 goto end_unlink; 917 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); 918 mark_inode_dirty(dir); 919 inode_dec_link_count(inode); 920 inode->i_ctime = dir->i_ctime; 921 retval = 0; 922 923 end_unlink: 924 if (fibh.sbh != fibh.ebh) 925 brelse(fibh.ebh); 926 brelse(fibh.sbh); 927 928 out: 929 unlock_kernel(); 930 return retval; 931 } 932 933 static int udf_symlink(struct inode *dir, struct dentry *dentry, 934 const char *symname) 935 { 936 struct inode *inode; 937 struct pathComponent *pc; 938 char *compstart; 939 struct udf_fileident_bh fibh; 940 struct extent_position epos = {}; 941 int eoffset, elen = 0; 942 struct fileIdentDesc *fi; 943 struct fileIdentDesc cfi; 944 char *ea; 945 int err; 946 int block; 947 char name[UDF_NAME_LEN]; 948 int namelen; 949 struct buffer_head *bh; 950 struct udf_inode_info *iinfo; 951 952 lock_kernel(); 953 inode = udf_new_inode(dir, S_IFLNK, &err); 954 if (!inode) 955 goto out; 956 957 iinfo = UDF_I(inode); 958 inode->i_mode = S_IFLNK | S_IRWXUGO; 959 inode->i_data.a_ops = &udf_symlink_aops; 960 inode->i_op = &page_symlink_inode_operations; 961 962 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 963 kernel_lb_addr eloc; 964 uint32_t elen; 965 966 block = udf_new_block(inode->i_sb, inode, 967 iinfo->i_location.partitionReferenceNum, 968 iinfo->i_location.logicalBlockNum, &err); 969 if (!block) 970 goto out_no_entry; 971 epos.block = iinfo->i_location; 972 epos.offset = udf_file_entry_alloc_offset(inode); 973 epos.bh = NULL; 974 eloc.logicalBlockNum = block; 975 eloc.partitionReferenceNum = 976 iinfo->i_location.partitionReferenceNum; 977 elen = inode->i_sb->s_blocksize; 978 iinfo->i_lenExtents = elen; 979 udf_add_aext(inode, &epos, eloc, elen, 0); 980 brelse(epos.bh); 981 982 block = udf_get_pblock(inode->i_sb, block, 983 iinfo->i_location.partitionReferenceNum, 984 0); 985 epos.bh = udf_tread(inode->i_sb, block); 986 lock_buffer(epos.bh); 987 memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); 988 set_buffer_uptodate(epos.bh); 989 unlock_buffer(epos.bh); 990 mark_buffer_dirty_inode(epos.bh, inode); 991 ea = epos.bh->b_data + udf_ext0_offset(inode); 992 } else 993 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; 994 995 eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); 996 pc = (struct pathComponent *)ea; 997 998 if (*symname == '/') { 999 do { 1000 symname++; 1001 } while (*symname == '/'); 1002 1003 pc->componentType = 1; 1004 pc->lengthComponentIdent = 0; 1005 pc->componentFileVersionNum = 0; 1006 pc += sizeof(struct pathComponent); 1007 elen += sizeof(struct pathComponent); 1008 } 1009 1010 err = -ENAMETOOLONG; 1011 1012 while (*symname) { 1013 if (elen + sizeof(struct pathComponent) > eoffset) 1014 goto out_no_entry; 1015 1016 pc = (struct pathComponent *)(ea + elen); 1017 1018 compstart = (char *)symname; 1019 1020 do { 1021 symname++; 1022 } while (*symname && *symname != '/'); 1023 1024 pc->componentType = 5; 1025 pc->lengthComponentIdent = 0; 1026 pc->componentFileVersionNum = 0; 1027 if (compstart[0] == '.') { 1028 if ((symname - compstart) == 1) 1029 pc->componentType = 4; 1030 else if ((symname - compstart) == 2 && 1031 compstart[1] == '.') 1032 pc->componentType = 3; 1033 } 1034 1035 if (pc->componentType == 5) { 1036 namelen = udf_put_filename(inode->i_sb, compstart, name, 1037 symname - compstart); 1038 if (!namelen) 1039 goto out_no_entry; 1040 1041 if (elen + sizeof(struct pathComponent) + namelen > 1042 eoffset) 1043 goto out_no_entry; 1044 else 1045 pc->lengthComponentIdent = namelen; 1046 1047 memcpy(pc->componentIdent, name, namelen); 1048 } 1049 1050 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; 1051 1052 if (*symname) { 1053 do { 1054 symname++; 1055 } while (*symname == '/'); 1056 } 1057 } 1058 1059 brelse(epos.bh); 1060 inode->i_size = elen; 1061 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1062 iinfo->i_lenAlloc = inode->i_size; 1063 mark_inode_dirty(inode); 1064 1065 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 1066 if (!fi) 1067 goto out_no_entry; 1068 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 1069 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 1070 bh = UDF_SB(inode->i_sb)->s_lvid_bh; 1071 if (bh) { 1072 struct logicalVolIntegrityDesc *lvid = 1073 (struct logicalVolIntegrityDesc *)bh->b_data; 1074 struct logicalVolHeaderDesc *lvhd; 1075 uint64_t uniqueID; 1076 lvhd = (struct logicalVolHeaderDesc *) 1077 lvid->logicalVolContentsUse; 1078 uniqueID = le64_to_cpu(lvhd->uniqueID); 1079 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 1080 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); 1081 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 1082 uniqueID += 16; 1083 lvhd->uniqueID = cpu_to_le64(uniqueID); 1084 mark_buffer_dirty(bh); 1085 } 1086 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 1087 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1088 mark_inode_dirty(dir); 1089 if (fibh.sbh != fibh.ebh) 1090 brelse(fibh.ebh); 1091 brelse(fibh.sbh); 1092 d_instantiate(dentry, inode); 1093 err = 0; 1094 1095 out: 1096 unlock_kernel(); 1097 return err; 1098 1099 out_no_entry: 1100 inode_dec_link_count(inode); 1101 iput(inode); 1102 goto out; 1103 } 1104 1105 static int udf_link(struct dentry *old_dentry, struct inode *dir, 1106 struct dentry *dentry) 1107 { 1108 struct inode *inode = old_dentry->d_inode; 1109 struct udf_fileident_bh fibh; 1110 struct fileIdentDesc cfi, *fi; 1111 int err; 1112 struct buffer_head *bh; 1113 1114 lock_kernel(); 1115 if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { 1116 unlock_kernel(); 1117 return -EMLINK; 1118 } 1119 1120 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 1121 if (!fi) { 1122 unlock_kernel(); 1123 return err; 1124 } 1125 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 1126 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); 1127 bh = UDF_SB(inode->i_sb)->s_lvid_bh; 1128 if (bh) { 1129 struct logicalVolIntegrityDesc *lvid = 1130 (struct logicalVolIntegrityDesc *)bh->b_data; 1131 struct logicalVolHeaderDesc *lvhd; 1132 uint64_t uniqueID; 1133 lvhd = (struct logicalVolHeaderDesc *) 1134 (lvid->logicalVolContentsUse); 1135 uniqueID = le64_to_cpu(lvhd->uniqueID); 1136 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 1137 cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); 1138 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 1139 uniqueID += 16; 1140 lvhd->uniqueID = cpu_to_le64(uniqueID); 1141 mark_buffer_dirty(bh); 1142 } 1143 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 1144 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1145 mark_inode_dirty(dir); 1146 1147 if (fibh.sbh != fibh.ebh) 1148 brelse(fibh.ebh); 1149 brelse(fibh.sbh); 1150 inc_nlink(inode); 1151 inode->i_ctime = current_fs_time(inode->i_sb); 1152 mark_inode_dirty(inode); 1153 atomic_inc(&inode->i_count); 1154 d_instantiate(dentry, inode); 1155 unlock_kernel(); 1156 1157 return 0; 1158 } 1159 1160 /* Anybody can rename anything with this: the permission checks are left to the 1161 * higher-level routines. 1162 */ 1163 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, 1164 struct inode *new_dir, struct dentry *new_dentry) 1165 { 1166 struct inode *old_inode = old_dentry->d_inode; 1167 struct inode *new_inode = new_dentry->d_inode; 1168 struct udf_fileident_bh ofibh, nfibh; 1169 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; 1170 struct fileIdentDesc ocfi, ncfi; 1171 struct buffer_head *dir_bh = NULL; 1172 int retval = -ENOENT; 1173 kernel_lb_addr tloc; 1174 struct udf_inode_info *old_iinfo = UDF_I(old_inode); 1175 1176 lock_kernel(); 1177 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); 1178 if (ofi) { 1179 if (ofibh.sbh != ofibh.ebh) 1180 brelse(ofibh.ebh); 1181 brelse(ofibh.sbh); 1182 } 1183 tloc = lelb_to_cpu(ocfi.icb.extLocation); 1184 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) 1185 != old_inode->i_ino) 1186 goto end_rename; 1187 1188 nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); 1189 if (nfi) { 1190 if (!new_inode) { 1191 if (nfibh.sbh != nfibh.ebh) 1192 brelse(nfibh.ebh); 1193 brelse(nfibh.sbh); 1194 nfi = NULL; 1195 } 1196 } 1197 if (S_ISDIR(old_inode->i_mode)) { 1198 int offset = udf_ext0_offset(old_inode); 1199 1200 if (new_inode) { 1201 retval = -ENOTEMPTY; 1202 if (!empty_dir(new_inode)) 1203 goto end_rename; 1204 } 1205 retval = -EIO; 1206 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1207 dir_fi = udf_get_fileident( 1208 old_iinfo->i_ext.i_data - 1209 (old_iinfo->i_efe ? 1210 sizeof(struct extendedFileEntry) : 1211 sizeof(struct fileEntry)), 1212 old_inode->i_sb->s_blocksize, &offset); 1213 } else { 1214 dir_bh = udf_bread(old_inode, 0, 0, &retval); 1215 if (!dir_bh) 1216 goto end_rename; 1217 dir_fi = udf_get_fileident(dir_bh->b_data, 1218 old_inode->i_sb->s_blocksize, &offset); 1219 } 1220 if (!dir_fi) 1221 goto end_rename; 1222 tloc = lelb_to_cpu(dir_fi->icb.extLocation); 1223 if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) != 1224 old_dir->i_ino) 1225 goto end_rename; 1226 1227 retval = -EMLINK; 1228 if (!new_inode && 1229 new_dir->i_nlink >= 1230 (256 << sizeof(new_dir->i_nlink)) - 1) 1231 goto end_rename; 1232 } 1233 if (!nfi) { 1234 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, 1235 &retval); 1236 if (!nfi) 1237 goto end_rename; 1238 } 1239 1240 /* 1241 * Like most other Unix systems, set the ctime for inodes on a 1242 * rename. 1243 */ 1244 old_inode->i_ctime = current_fs_time(old_inode->i_sb); 1245 mark_inode_dirty(old_inode); 1246 1247 /* 1248 * ok, that's it 1249 */ 1250 ncfi.fileVersionNum = ocfi.fileVersionNum; 1251 ncfi.fileCharacteristics = ocfi.fileCharacteristics; 1252 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); 1253 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); 1254 1255 /* The old fid may have moved - find it again */ 1256 ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); 1257 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); 1258 1259 if (new_inode) { 1260 new_inode->i_ctime = current_fs_time(new_inode->i_sb); 1261 inode_dec_link_count(new_inode); 1262 } 1263 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); 1264 mark_inode_dirty(old_dir); 1265 1266 if (dir_fi) { 1267 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); 1268 udf_update_tag((char *)dir_fi, 1269 (sizeof(struct fileIdentDesc) + 1270 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); 1271 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1272 mark_inode_dirty(old_inode); 1273 else 1274 mark_buffer_dirty_inode(dir_bh, old_inode); 1275 1276 inode_dec_link_count(old_dir); 1277 if (new_inode) 1278 inode_dec_link_count(new_inode); 1279 else { 1280 inc_nlink(new_dir); 1281 mark_inode_dirty(new_dir); 1282 } 1283 } 1284 1285 if (ofi) { 1286 if (ofibh.sbh != ofibh.ebh) 1287 brelse(ofibh.ebh); 1288 brelse(ofibh.sbh); 1289 } 1290 1291 retval = 0; 1292 1293 end_rename: 1294 brelse(dir_bh); 1295 if (nfi) { 1296 if (nfibh.sbh != nfibh.ebh) 1297 brelse(nfibh.ebh); 1298 brelse(nfibh.sbh); 1299 } 1300 unlock_kernel(); 1301 1302 return retval; 1303 } 1304 1305 const struct inode_operations udf_dir_inode_operations = { 1306 .lookup = udf_lookup, 1307 .create = udf_create, 1308 .link = udf_link, 1309 .unlink = udf_unlink, 1310 .symlink = udf_symlink, 1311 .mkdir = udf_mkdir, 1312 .rmdir = udf_rmdir, 1313 .mknod = udf_mknod, 1314 .rename = udf_rename, 1315 }; 1316