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/buffer_head.h> 31 #include <linux/sched.h> 32 #include <linux/crc-itu-t.h> 33 #include <linux/exportfs.h> 34 35 static inline int udf_match(int len1, const unsigned char *name1, int len2, 36 const unsigned 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(struct 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 = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), 101 sizeof(struct fileIdentDesc) - sizeof(struct tag)); 102 103 if (fibh->sbh == fibh->ebh) { 104 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, 105 crclen + sizeof(struct tag) - 106 sizeof(struct fileIdentDesc)); 107 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { 108 crc = crc_itu_t(crc, fibh->ebh->b_data + 109 sizeof(struct fileIdentDesc) + 110 fibh->soffset, 111 crclen + sizeof(struct tag) - 112 sizeof(struct fileIdentDesc)); 113 } else { 114 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, 115 -fibh->soffset - sizeof(struct fileIdentDesc)); 116 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); 117 } 118 119 cfi->descTag.descCRC = cpu_to_le16(crc); 120 cfi->descTag.descCRCLength = cpu_to_le16(crclen); 121 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); 122 123 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { 124 memcpy((uint8_t *)sfi, (uint8_t *)cfi, 125 sizeof(struct fileIdentDesc)); 126 } else { 127 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); 128 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, 129 sizeof(struct fileIdentDesc) + fibh->soffset); 130 } 131 132 if (adinicb) { 133 mark_inode_dirty(inode); 134 } else { 135 if (fibh->sbh != fibh->ebh) 136 mark_buffer_dirty_inode(fibh->ebh, inode); 137 mark_buffer_dirty_inode(fibh->sbh, inode); 138 } 139 return 0; 140 } 141 142 static struct fileIdentDesc *udf_find_entry(struct inode *dir, 143 const struct qstr *child, 144 struct udf_fileident_bh *fibh, 145 struct fileIdentDesc *cfi) 146 { 147 struct fileIdentDesc *fi = NULL; 148 loff_t f_pos; 149 int block, flen; 150 unsigned char *fname = NULL; 151 unsigned char *nameptr; 152 uint8_t lfi; 153 uint16_t liu; 154 loff_t size; 155 struct kernel_lb_addr eloc; 156 uint32_t elen; 157 sector_t offset; 158 struct extent_position epos = {}; 159 struct udf_inode_info *dinfo = UDF_I(dir); 160 int isdotdot = child->len == 2 && 161 child->name[0] == '.' && child->name[1] == '.'; 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(struct short_ad); 176 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 177 epos.offset -= sizeof(struct 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 ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && 230 isdotdot) 231 goto out_ok; 232 233 if (!lfi) 234 continue; 235 236 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); 237 if (flen && udf_match(flen, fname, child->len, child->name)) 238 goto out_ok; 239 } 240 241 out_err: 242 fi = NULL; 243 if (fibh->sbh != fibh->ebh) 244 brelse(fibh->ebh); 245 brelse(fibh->sbh); 246 out_ok: 247 brelse(epos.bh); 248 kfree(fname); 249 250 return fi; 251 } 252 253 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, 254 unsigned int flags) 255 { 256 struct inode *inode = NULL; 257 struct fileIdentDesc cfi; 258 struct udf_fileident_bh fibh; 259 260 if (dentry->d_name.len > UDF_NAME_LEN - 2) 261 return ERR_PTR(-ENAMETOOLONG); 262 263 #ifdef UDF_RECOVERY 264 /* temporary shorthand for specifying files by inode number */ 265 if (!strncmp(dentry->d_name.name, ".B=", 3)) { 266 struct kernel_lb_addr lb = { 267 .logicalBlockNum = 0, 268 .partitionReferenceNum = 269 simple_strtoul(dentry->d_name.name + 3, 270 NULL, 0), 271 }; 272 inode = udf_iget(dir->i_sb, lb); 273 if (IS_ERR(inode)) 274 return inode; 275 } else 276 #endif /* UDF_RECOVERY */ 277 278 if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { 279 struct kernel_lb_addr loc; 280 281 if (fibh.sbh != fibh.ebh) 282 brelse(fibh.ebh); 283 brelse(fibh.sbh); 284 285 loc = lelb_to_cpu(cfi.icb.extLocation); 286 inode = udf_iget(dir->i_sb, &loc); 287 if (IS_ERR(inode)) 288 return ERR_CAST(inode); 289 } 290 291 return d_splice_alias(inode, dentry); 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 unsigned 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 struct kernel_lb_addr eloc; 310 uint32_t elen = 0; 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(struct short_ad); 355 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 356 epos.offset -= sizeof(struct 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 f_pos += nfidlen; 402 403 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && 404 sb->s_blocksize - fibh->eoffset < nfidlen) { 405 brelse(epos.bh); 406 epos.bh = NULL; 407 fibh->soffset -= udf_ext0_offset(dir); 408 fibh->eoffset -= udf_ext0_offset(dir); 409 f_pos -= udf_ext0_offset(dir); 410 if (fibh->sbh != fibh->ebh) 411 brelse(fibh->ebh); 412 brelse(fibh->sbh); 413 fibh->sbh = fibh->ebh = 414 udf_expand_dir_adinicb(dir, &block, err); 415 if (!fibh->sbh) 416 goto out_err; 417 epos.block = dinfo->i_location; 418 epos.offset = udf_file_entry_alloc_offset(dir); 419 /* Load extent udf_expand_dir_adinicb() has created */ 420 udf_current_aext(dir, &epos, &eloc, &elen, 1); 421 } 422 423 /* Entry fits into current block? */ 424 if (sb->s_blocksize - fibh->eoffset >= nfidlen) { 425 fibh->soffset = fibh->eoffset; 426 fibh->eoffset += nfidlen; 427 if (fibh->sbh != fibh->ebh) { 428 brelse(fibh->sbh); 429 fibh->sbh = fibh->ebh; 430 } 431 432 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 433 block = dinfo->i_location.logicalBlockNum; 434 fi = (struct fileIdentDesc *) 435 (dinfo->i_ext.i_data + 436 fibh->soffset - 437 udf_ext0_offset(dir) + 438 dinfo->i_lenEAttr); 439 } else { 440 block = eloc.logicalBlockNum + 441 ((elen - 1) >> 442 dir->i_sb->s_blocksize_bits); 443 fi = (struct fileIdentDesc *) 444 (fibh->sbh->b_data + fibh->soffset); 445 } 446 } else { 447 /* Round up last extent in the file */ 448 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); 449 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 450 epos.offset -= sizeof(struct short_ad); 451 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 452 epos.offset -= sizeof(struct long_ad); 453 udf_write_aext(dir, &epos, &eloc, elen, 1); 454 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize 455 - 1) & ~(sb->s_blocksize - 1); 456 457 fibh->soffset = fibh->eoffset - sb->s_blocksize; 458 fibh->eoffset += nfidlen - sb->s_blocksize; 459 if (fibh->sbh != fibh->ebh) { 460 brelse(fibh->sbh); 461 fibh->sbh = fibh->ebh; 462 } 463 464 block = eloc.logicalBlockNum + ((elen - 1) >> 465 dir->i_sb->s_blocksize_bits); 466 fibh->ebh = udf_bread(dir, 467 f_pos >> dir->i_sb->s_blocksize_bits, 1, err); 468 if (!fibh->ebh) 469 goto out_err; 470 /* Extents could have been merged, invalidate our position */ 471 brelse(epos.bh); 472 epos.bh = NULL; 473 epos.block = dinfo->i_location; 474 epos.offset = udf_file_entry_alloc_offset(dir); 475 476 if (!fibh->soffset) { 477 /* Find the freshly allocated block */ 478 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == 479 (EXT_RECORDED_ALLOCATED >> 30)) 480 ; 481 block = eloc.logicalBlockNum + ((elen - 1) >> 482 dir->i_sb->s_blocksize_bits); 483 brelse(fibh->sbh); 484 fibh->sbh = fibh->ebh; 485 fi = (struct fileIdentDesc *)(fibh->sbh->b_data); 486 } else { 487 fi = (struct fileIdentDesc *) 488 (fibh->sbh->b_data + sb->s_blocksize + 489 fibh->soffset); 490 } 491 } 492 493 memset(cfi, 0, sizeof(struct fileIdentDesc)); 494 if (UDF_SB(sb)->s_udfrev >= 0x0200) 495 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, 496 sizeof(struct tag)); 497 else 498 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, 499 sizeof(struct tag)); 500 cfi->fileVersionNum = cpu_to_le16(1); 501 cfi->lengthFileIdent = namelen; 502 cfi->lengthOfImpUse = cpu_to_le16(0); 503 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { 504 dir->i_size += nfidlen; 505 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 506 dinfo->i_lenAlloc += nfidlen; 507 else { 508 /* Find the last extent and truncate it to proper size */ 509 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == 510 (EXT_RECORDED_ALLOCATED >> 30)) 511 ; 512 elen -= dinfo->i_lenExtents - dir->i_size; 513 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 514 epos.offset -= sizeof(struct short_ad); 515 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 516 epos.offset -= sizeof(struct long_ad); 517 udf_write_aext(dir, &epos, &eloc, elen, 1); 518 dinfo->i_lenExtents = dir->i_size; 519 } 520 521 mark_inode_dirty(dir); 522 goto out_ok; 523 } else { 524 *err = -EIO; 525 goto out_err; 526 } 527 528 out_err: 529 fi = NULL; 530 if (fibh->sbh != fibh->ebh) 531 brelse(fibh->ebh); 532 brelse(fibh->sbh); 533 out_ok: 534 brelse(epos.bh); 535 kfree(name); 536 return fi; 537 } 538 539 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, 540 struct udf_fileident_bh *fibh, 541 struct fileIdentDesc *cfi) 542 { 543 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; 544 545 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) 546 memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); 547 548 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); 549 } 550 551 static int udf_add_nondir(struct dentry *dentry, struct inode *inode) 552 { 553 struct udf_inode_info *iinfo = UDF_I(inode); 554 struct inode *dir = dentry->d_parent->d_inode; 555 struct udf_fileident_bh fibh; 556 struct fileIdentDesc cfi, *fi; 557 int err; 558 559 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 560 if (unlikely(!fi)) { 561 inode_dec_link_count(inode); 562 unlock_new_inode(inode); 563 iput(inode); 564 return err; 565 } 566 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 567 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 568 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 569 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); 570 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 571 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 572 mark_inode_dirty(dir); 573 if (fibh.sbh != fibh.ebh) 574 brelse(fibh.ebh); 575 brelse(fibh.sbh); 576 unlock_new_inode(inode); 577 d_instantiate(dentry, inode); 578 579 return 0; 580 } 581 582 static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode, 583 bool excl) 584 { 585 struct inode *inode = udf_new_inode(dir, mode); 586 587 if (IS_ERR(inode)) 588 return PTR_ERR(inode); 589 590 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 591 inode->i_data.a_ops = &udf_adinicb_aops; 592 else 593 inode->i_data.a_ops = &udf_aops; 594 inode->i_op = &udf_file_inode_operations; 595 inode->i_fop = &udf_file_operations; 596 mark_inode_dirty(inode); 597 598 return udf_add_nondir(dentry, inode); 599 } 600 601 static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) 602 { 603 struct inode *inode = udf_new_inode(dir, mode); 604 605 if (IS_ERR(inode)) 606 return PTR_ERR(inode); 607 608 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 609 inode->i_data.a_ops = &udf_adinicb_aops; 610 else 611 inode->i_data.a_ops = &udf_aops; 612 inode->i_op = &udf_file_inode_operations; 613 inode->i_fop = &udf_file_operations; 614 mark_inode_dirty(inode); 615 d_tmpfile(dentry, inode); 616 unlock_new_inode(inode); 617 return 0; 618 } 619 620 static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 621 dev_t rdev) 622 { 623 struct inode *inode; 624 625 if (!old_valid_dev(rdev)) 626 return -EINVAL; 627 628 inode = udf_new_inode(dir, mode); 629 if (IS_ERR(inode)) 630 return PTR_ERR(inode); 631 632 init_special_inode(inode, mode, rdev); 633 return udf_add_nondir(dentry, inode); 634 } 635 636 static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 637 { 638 struct inode *inode; 639 struct udf_fileident_bh fibh; 640 struct fileIdentDesc cfi, *fi; 641 int err; 642 struct udf_inode_info *dinfo = UDF_I(dir); 643 struct udf_inode_info *iinfo; 644 645 inode = udf_new_inode(dir, S_IFDIR | mode); 646 if (IS_ERR(inode)) 647 return PTR_ERR(inode); 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_dec_link_count(inode); 655 unlock_new_inode(inode); 656 iput(inode); 657 goto out; 658 } 659 set_nlink(inode, 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 mark_inode_dirty(inode); 669 670 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 671 if (!fi) { 672 clear_nlink(inode); 673 mark_inode_dirty(inode); 674 unlock_new_inode(inode); 675 iput(inode); 676 goto out; 677 } 678 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 679 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 680 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 681 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); 682 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; 683 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 684 inc_nlink(dir); 685 mark_inode_dirty(dir); 686 unlock_new_inode(inode); 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 return err; 695 } 696 697 static int empty_dir(struct inode *dir) 698 { 699 struct fileIdentDesc *fi, cfi; 700 struct udf_fileident_bh fibh; 701 loff_t f_pos; 702 loff_t size = udf_ext0_offset(dir) + dir->i_size; 703 int block; 704 struct kernel_lb_addr eloc; 705 uint32_t elen; 706 sector_t offset; 707 struct extent_position epos = {}; 708 struct udf_inode_info *dinfo = UDF_I(dir); 709 710 f_pos = udf_ext0_offset(dir); 711 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); 712 713 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 714 fibh.sbh = fibh.ebh = NULL; 715 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, 716 &epos, &eloc, &elen, &offset) == 717 (EXT_RECORDED_ALLOCATED >> 30)) { 718 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); 719 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { 720 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 721 epos.offset -= sizeof(struct short_ad); 722 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 723 epos.offset -= sizeof(struct long_ad); 724 } else 725 offset = 0; 726 727 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); 728 if (!fibh.sbh) { 729 brelse(epos.bh); 730 return 0; 731 } 732 } else { 733 brelse(epos.bh); 734 return 0; 735 } 736 737 while (f_pos < size) { 738 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, 739 &elen, &offset); 740 if (!fi) { 741 if (fibh.sbh != fibh.ebh) 742 brelse(fibh.ebh); 743 brelse(fibh.sbh); 744 brelse(epos.bh); 745 return 0; 746 } 747 748 if (cfi.lengthFileIdent && 749 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { 750 if (fibh.sbh != fibh.ebh) 751 brelse(fibh.ebh); 752 brelse(fibh.sbh); 753 brelse(epos.bh); 754 return 0; 755 } 756 } 757 758 if (fibh.sbh != fibh.ebh) 759 brelse(fibh.ebh); 760 brelse(fibh.sbh); 761 brelse(epos.bh); 762 763 return 1; 764 } 765 766 static int udf_rmdir(struct inode *dir, struct dentry *dentry) 767 { 768 int retval; 769 struct inode *inode = dentry->d_inode; 770 struct udf_fileident_bh fibh; 771 struct fileIdentDesc *fi, cfi; 772 struct kernel_lb_addr tloc; 773 774 retval = -ENOENT; 775 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); 776 if (!fi) 777 goto out; 778 779 retval = -EIO; 780 tloc = lelb_to_cpu(cfi.icb.extLocation); 781 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) 782 goto end_rmdir; 783 retval = -ENOTEMPTY; 784 if (!empty_dir(inode)) 785 goto end_rmdir; 786 retval = udf_delete_entry(dir, fi, &fibh, &cfi); 787 if (retval) 788 goto end_rmdir; 789 if (inode->i_nlink != 2) 790 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n", 791 inode->i_nlink); 792 clear_nlink(inode); 793 inode->i_size = 0; 794 inode_dec_link_count(dir); 795 inode->i_ctime = dir->i_ctime = dir->i_mtime = 796 current_fs_time(dir->i_sb); 797 mark_inode_dirty(dir); 798 799 end_rmdir: 800 if (fibh.sbh != fibh.ebh) 801 brelse(fibh.ebh); 802 brelse(fibh.sbh); 803 804 out: 805 return retval; 806 } 807 808 static int udf_unlink(struct inode *dir, struct dentry *dentry) 809 { 810 int retval; 811 struct inode *inode = dentry->d_inode; 812 struct udf_fileident_bh fibh; 813 struct fileIdentDesc *fi; 814 struct fileIdentDesc cfi; 815 struct kernel_lb_addr tloc; 816 817 retval = -ENOENT; 818 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); 819 if (!fi) 820 goto out; 821 822 retval = -EIO; 823 tloc = lelb_to_cpu(cfi.icb.extLocation); 824 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) 825 goto end_unlink; 826 827 if (!inode->i_nlink) { 828 udf_debug("Deleting nonexistent file (%lu), %d\n", 829 inode->i_ino, inode->i_nlink); 830 set_nlink(inode, 1); 831 } 832 retval = udf_delete_entry(dir, fi, &fibh, &cfi); 833 if (retval) 834 goto end_unlink; 835 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); 836 mark_inode_dirty(dir); 837 inode_dec_link_count(inode); 838 inode->i_ctime = dir->i_ctime; 839 retval = 0; 840 841 end_unlink: 842 if (fibh.sbh != fibh.ebh) 843 brelse(fibh.ebh); 844 brelse(fibh.sbh); 845 846 out: 847 return retval; 848 } 849 850 static int udf_symlink(struct inode *dir, struct dentry *dentry, 851 const char *symname) 852 { 853 struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO); 854 struct pathComponent *pc; 855 const char *compstart; 856 struct extent_position epos = {}; 857 int eoffset, elen = 0; 858 uint8_t *ea; 859 int err; 860 int block; 861 unsigned char *name = NULL; 862 int namelen; 863 struct udf_inode_info *iinfo; 864 struct super_block *sb = dir->i_sb; 865 866 if (IS_ERR(inode)) 867 return PTR_ERR(inode); 868 869 iinfo = UDF_I(inode); 870 down_write(&iinfo->i_data_sem); 871 name = kmalloc(UDF_NAME_LEN, GFP_NOFS); 872 if (!name) { 873 err = -ENOMEM; 874 goto out_no_entry; 875 } 876 877 inode->i_data.a_ops = &udf_symlink_aops; 878 inode->i_op = &udf_symlink_inode_operations; 879 880 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 881 struct kernel_lb_addr eloc; 882 uint32_t bsize; 883 884 block = udf_new_block(sb, inode, 885 iinfo->i_location.partitionReferenceNum, 886 iinfo->i_location.logicalBlockNum, &err); 887 if (!block) 888 goto out_no_entry; 889 epos.block = iinfo->i_location; 890 epos.offset = udf_file_entry_alloc_offset(inode); 891 epos.bh = NULL; 892 eloc.logicalBlockNum = block; 893 eloc.partitionReferenceNum = 894 iinfo->i_location.partitionReferenceNum; 895 bsize = sb->s_blocksize; 896 iinfo->i_lenExtents = bsize; 897 udf_add_aext(inode, &epos, &eloc, bsize, 0); 898 brelse(epos.bh); 899 900 block = udf_get_pblock(sb, block, 901 iinfo->i_location.partitionReferenceNum, 902 0); 903 epos.bh = udf_tgetblk(sb, block); 904 lock_buffer(epos.bh); 905 memset(epos.bh->b_data, 0x00, bsize); 906 set_buffer_uptodate(epos.bh); 907 unlock_buffer(epos.bh); 908 mark_buffer_dirty_inode(epos.bh, inode); 909 ea = epos.bh->b_data + udf_ext0_offset(inode); 910 } else 911 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; 912 913 eoffset = sb->s_blocksize - udf_ext0_offset(inode); 914 pc = (struct pathComponent *)ea; 915 916 if (*symname == '/') { 917 do { 918 symname++; 919 } while (*symname == '/'); 920 921 pc->componentType = 1; 922 pc->lengthComponentIdent = 0; 923 pc->componentFileVersionNum = 0; 924 elen += sizeof(struct pathComponent); 925 } 926 927 err = -ENAMETOOLONG; 928 929 while (*symname) { 930 if (elen + sizeof(struct pathComponent) > eoffset) 931 goto out_no_entry; 932 933 pc = (struct pathComponent *)(ea + elen); 934 935 compstart = symname; 936 937 do { 938 symname++; 939 } while (*symname && *symname != '/'); 940 941 pc->componentType = 5; 942 pc->lengthComponentIdent = 0; 943 pc->componentFileVersionNum = 0; 944 if (compstart[0] == '.') { 945 if ((symname - compstart) == 1) 946 pc->componentType = 4; 947 else if ((symname - compstart) == 2 && 948 compstart[1] == '.') 949 pc->componentType = 3; 950 } 951 952 if (pc->componentType == 5) { 953 namelen = udf_put_filename(sb, compstart, name, 954 symname - compstart); 955 if (!namelen) 956 goto out_no_entry; 957 958 if (elen + sizeof(struct pathComponent) + namelen > 959 eoffset) 960 goto out_no_entry; 961 else 962 pc->lengthComponentIdent = namelen; 963 964 memcpy(pc->componentIdent, name, namelen); 965 } 966 967 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; 968 969 if (*symname) { 970 do { 971 symname++; 972 } while (*symname == '/'); 973 } 974 } 975 976 brelse(epos.bh); 977 inode->i_size = elen; 978 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 979 iinfo->i_lenAlloc = inode->i_size; 980 else 981 udf_truncate_tail_extent(inode); 982 mark_inode_dirty(inode); 983 up_write(&iinfo->i_data_sem); 984 985 err = udf_add_nondir(dentry, inode); 986 out: 987 kfree(name); 988 return err; 989 990 out_no_entry: 991 up_write(&iinfo->i_data_sem); 992 inode_dec_link_count(inode); 993 unlock_new_inode(inode); 994 iput(inode); 995 goto out; 996 } 997 998 static int udf_link(struct dentry *old_dentry, struct inode *dir, 999 struct dentry *dentry) 1000 { 1001 struct inode *inode = old_dentry->d_inode; 1002 struct udf_fileident_bh fibh; 1003 struct fileIdentDesc cfi, *fi; 1004 int err; 1005 1006 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 1007 if (!fi) { 1008 return err; 1009 } 1010 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 1011 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); 1012 if (UDF_SB(inode->i_sb)->s_lvid_bh) { 1013 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 1014 cpu_to_le32(lvid_get_unique_id(inode->i_sb)); 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 1020 if (fibh.sbh != fibh.ebh) 1021 brelse(fibh.ebh); 1022 brelse(fibh.sbh); 1023 inc_nlink(inode); 1024 inode->i_ctime = current_fs_time(inode->i_sb); 1025 mark_inode_dirty(inode); 1026 ihold(inode); 1027 d_instantiate(dentry, inode); 1028 1029 return 0; 1030 } 1031 1032 /* Anybody can rename anything with this: the permission checks are left to the 1033 * higher-level routines. 1034 */ 1035 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, 1036 struct inode *new_dir, struct dentry *new_dentry) 1037 { 1038 struct inode *old_inode = old_dentry->d_inode; 1039 struct inode *new_inode = new_dentry->d_inode; 1040 struct udf_fileident_bh ofibh, nfibh; 1041 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; 1042 struct fileIdentDesc ocfi, ncfi; 1043 struct buffer_head *dir_bh = NULL; 1044 int retval = -ENOENT; 1045 struct kernel_lb_addr tloc; 1046 struct udf_inode_info *old_iinfo = UDF_I(old_inode); 1047 1048 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); 1049 if (ofi) { 1050 if (ofibh.sbh != ofibh.ebh) 1051 brelse(ofibh.ebh); 1052 brelse(ofibh.sbh); 1053 } 1054 tloc = lelb_to_cpu(ocfi.icb.extLocation); 1055 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) 1056 != old_inode->i_ino) 1057 goto end_rename; 1058 1059 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); 1060 if (nfi) { 1061 if (!new_inode) { 1062 if (nfibh.sbh != nfibh.ebh) 1063 brelse(nfibh.ebh); 1064 brelse(nfibh.sbh); 1065 nfi = NULL; 1066 } 1067 } 1068 if (S_ISDIR(old_inode->i_mode)) { 1069 int offset = udf_ext0_offset(old_inode); 1070 1071 if (new_inode) { 1072 retval = -ENOTEMPTY; 1073 if (!empty_dir(new_inode)) 1074 goto end_rename; 1075 } 1076 retval = -EIO; 1077 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1078 dir_fi = udf_get_fileident( 1079 old_iinfo->i_ext.i_data - 1080 (old_iinfo->i_efe ? 1081 sizeof(struct extendedFileEntry) : 1082 sizeof(struct fileEntry)), 1083 old_inode->i_sb->s_blocksize, &offset); 1084 } else { 1085 dir_bh = udf_bread(old_inode, 0, 0, &retval); 1086 if (!dir_bh) 1087 goto end_rename; 1088 dir_fi = udf_get_fileident(dir_bh->b_data, 1089 old_inode->i_sb->s_blocksize, &offset); 1090 } 1091 if (!dir_fi) 1092 goto end_rename; 1093 tloc = lelb_to_cpu(dir_fi->icb.extLocation); 1094 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != 1095 old_dir->i_ino) 1096 goto end_rename; 1097 } 1098 if (!nfi) { 1099 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, 1100 &retval); 1101 if (!nfi) 1102 goto end_rename; 1103 } 1104 1105 /* 1106 * Like most other Unix systems, set the ctime for inodes on a 1107 * rename. 1108 */ 1109 old_inode->i_ctime = current_fs_time(old_inode->i_sb); 1110 mark_inode_dirty(old_inode); 1111 1112 /* 1113 * ok, that's it 1114 */ 1115 ncfi.fileVersionNum = ocfi.fileVersionNum; 1116 ncfi.fileCharacteristics = ocfi.fileCharacteristics; 1117 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); 1118 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); 1119 1120 /* The old fid may have moved - find it again */ 1121 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); 1122 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); 1123 1124 if (new_inode) { 1125 new_inode->i_ctime = current_fs_time(new_inode->i_sb); 1126 inode_dec_link_count(new_inode); 1127 } 1128 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); 1129 mark_inode_dirty(old_dir); 1130 1131 if (dir_fi) { 1132 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); 1133 udf_update_tag((char *)dir_fi, 1134 (sizeof(struct fileIdentDesc) + 1135 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); 1136 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1137 mark_inode_dirty(old_inode); 1138 else 1139 mark_buffer_dirty_inode(dir_bh, old_inode); 1140 1141 inode_dec_link_count(old_dir); 1142 if (new_inode) 1143 inode_dec_link_count(new_inode); 1144 else { 1145 inc_nlink(new_dir); 1146 mark_inode_dirty(new_dir); 1147 } 1148 } 1149 1150 if (ofi) { 1151 if (ofibh.sbh != ofibh.ebh) 1152 brelse(ofibh.ebh); 1153 brelse(ofibh.sbh); 1154 } 1155 1156 retval = 0; 1157 1158 end_rename: 1159 brelse(dir_bh); 1160 if (nfi) { 1161 if (nfibh.sbh != nfibh.ebh) 1162 brelse(nfibh.ebh); 1163 brelse(nfibh.sbh); 1164 } 1165 1166 return retval; 1167 } 1168 1169 static struct dentry *udf_get_parent(struct dentry *child) 1170 { 1171 struct kernel_lb_addr tloc; 1172 struct inode *inode = NULL; 1173 struct qstr dotdot = QSTR_INIT("..", 2); 1174 struct fileIdentDesc cfi; 1175 struct udf_fileident_bh fibh; 1176 1177 if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) 1178 return ERR_PTR(-EACCES); 1179 1180 if (fibh.sbh != fibh.ebh) 1181 brelse(fibh.ebh); 1182 brelse(fibh.sbh); 1183 1184 tloc = lelb_to_cpu(cfi.icb.extLocation); 1185 inode = udf_iget(child->d_inode->i_sb, &tloc); 1186 if (IS_ERR(inode)) 1187 return ERR_CAST(inode); 1188 1189 return d_obtain_alias(inode); 1190 } 1191 1192 1193 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, 1194 u16 partref, __u32 generation) 1195 { 1196 struct inode *inode; 1197 struct kernel_lb_addr loc; 1198 1199 if (block == 0) 1200 return ERR_PTR(-ESTALE); 1201 1202 loc.logicalBlockNum = block; 1203 loc.partitionReferenceNum = partref; 1204 inode = udf_iget(sb, &loc); 1205 1206 if (IS_ERR(inode)) 1207 return ERR_CAST(inode); 1208 1209 if (generation && inode->i_generation != generation) { 1210 iput(inode); 1211 return ERR_PTR(-ESTALE); 1212 } 1213 return d_obtain_alias(inode); 1214 } 1215 1216 static struct dentry *udf_fh_to_dentry(struct super_block *sb, 1217 struct fid *fid, int fh_len, int fh_type) 1218 { 1219 if ((fh_len != 3 && fh_len != 5) || 1220 (fh_type != FILEID_UDF_WITH_PARENT && 1221 fh_type != FILEID_UDF_WITHOUT_PARENT)) 1222 return NULL; 1223 1224 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, 1225 fid->udf.generation); 1226 } 1227 1228 static struct dentry *udf_fh_to_parent(struct super_block *sb, 1229 struct fid *fid, int fh_len, int fh_type) 1230 { 1231 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) 1232 return NULL; 1233 1234 return udf_nfs_get_inode(sb, fid->udf.parent_block, 1235 fid->udf.parent_partref, 1236 fid->udf.parent_generation); 1237 } 1238 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp, 1239 struct inode *parent) 1240 { 1241 int len = *lenp; 1242 struct kernel_lb_addr location = UDF_I(inode)->i_location; 1243 struct fid *fid = (struct fid *)fh; 1244 int type = FILEID_UDF_WITHOUT_PARENT; 1245 1246 if (parent && (len < 5)) { 1247 *lenp = 5; 1248 return FILEID_INVALID; 1249 } else if (len < 3) { 1250 *lenp = 3; 1251 return FILEID_INVALID; 1252 } 1253 1254 *lenp = 3; 1255 fid->udf.block = location.logicalBlockNum; 1256 fid->udf.partref = location.partitionReferenceNum; 1257 fid->udf.parent_partref = 0; 1258 fid->udf.generation = inode->i_generation; 1259 1260 if (parent) { 1261 location = UDF_I(parent)->i_location; 1262 fid->udf.parent_block = location.logicalBlockNum; 1263 fid->udf.parent_partref = location.partitionReferenceNum; 1264 fid->udf.parent_generation = inode->i_generation; 1265 *lenp = 5; 1266 type = FILEID_UDF_WITH_PARENT; 1267 } 1268 1269 return type; 1270 } 1271 1272 const struct export_operations udf_export_ops = { 1273 .encode_fh = udf_encode_fh, 1274 .fh_to_dentry = udf_fh_to_dentry, 1275 .fh_to_parent = udf_fh_to_parent, 1276 .get_parent = udf_get_parent, 1277 }; 1278 1279 const struct inode_operations udf_dir_inode_operations = { 1280 .lookup = udf_lookup, 1281 .create = udf_create, 1282 .link = udf_link, 1283 .unlink = udf_unlink, 1284 .symlink = udf_symlink, 1285 .mkdir = udf_mkdir, 1286 .rmdir = udf_rmdir, 1287 .mknod = udf_mknod, 1288 .rename = udf_rename, 1289 .tmpfile = udf_tmpfile, 1290 }; 1291 const struct inode_operations udf_symlink_inode_operations = { 1292 .readlink = generic_readlink, 1293 .follow_link = page_follow_link_light, 1294 .put_link = page_put_link, 1295 }; 1296