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/sched.h> 31 #include <linux/crc-itu-t.h> 32 #include <linux/exportfs.h> 33 34 static inline int udf_match(int len1, const unsigned char *name1, int len2, 35 const unsigned char *name2) 36 { 37 if (len1 != len2) 38 return 0; 39 40 return !memcmp(name1, name2, len1); 41 } 42 43 int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, 44 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, 45 uint8_t *impuse, uint8_t *fileident) 46 { 47 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); 48 uint16_t crc; 49 int offset; 50 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); 51 uint8_t lfi = cfi->lengthFileIdent; 52 int padlen = fibh->eoffset - fibh->soffset - liu - lfi - 53 sizeof(struct fileIdentDesc); 54 int adinicb = 0; 55 56 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 57 adinicb = 1; 58 59 offset = fibh->soffset + sizeof(struct fileIdentDesc); 60 61 if (impuse) { 62 if (adinicb || (offset + liu < 0)) { 63 memcpy((uint8_t *)sfi->impUse, impuse, liu); 64 } else if (offset >= 0) { 65 memcpy(fibh->ebh->b_data + offset, impuse, liu); 66 } else { 67 memcpy((uint8_t *)sfi->impUse, impuse, -offset); 68 memcpy(fibh->ebh->b_data, impuse - offset, 69 liu + offset); 70 } 71 } 72 73 offset += liu; 74 75 if (fileident) { 76 if (adinicb || (offset + lfi < 0)) { 77 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); 78 } else if (offset >= 0) { 79 memcpy(fibh->ebh->b_data + offset, fileident, lfi); 80 } else { 81 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, 82 -offset); 83 memcpy(fibh->ebh->b_data, fileident - offset, 84 lfi + offset); 85 } 86 } 87 88 offset += lfi; 89 90 if (adinicb || (offset + padlen < 0)) { 91 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); 92 } else if (offset >= 0) { 93 memset(fibh->ebh->b_data + offset, 0x00, padlen); 94 } else { 95 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); 96 memset(fibh->ebh->b_data, 0x00, padlen + offset); 97 } 98 99 crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), 100 sizeof(struct fileIdentDesc) - sizeof(struct tag)); 101 102 if (fibh->sbh == fibh->ebh) { 103 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, 104 crclen + sizeof(struct tag) - 105 sizeof(struct fileIdentDesc)); 106 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { 107 crc = crc_itu_t(crc, fibh->ebh->b_data + 108 sizeof(struct fileIdentDesc) + 109 fibh->soffset, 110 crclen + sizeof(struct tag) - 111 sizeof(struct fileIdentDesc)); 112 } else { 113 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, 114 -fibh->soffset - sizeof(struct fileIdentDesc)); 115 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); 116 } 117 118 cfi->descTag.descCRC = cpu_to_le16(crc); 119 cfi->descTag.descCRCLength = cpu_to_le16(crclen); 120 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); 121 122 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { 123 memcpy((uint8_t *)sfi, (uint8_t *)cfi, 124 sizeof(struct fileIdentDesc)); 125 } else { 126 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); 127 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, 128 sizeof(struct fileIdentDesc) + fibh->soffset); 129 } 130 131 if (adinicb) { 132 mark_inode_dirty(inode); 133 } else { 134 if (fibh->sbh != fibh->ebh) 135 mark_buffer_dirty_inode(fibh->ebh, inode); 136 mark_buffer_dirty_inode(fibh->sbh, inode); 137 } 138 return 0; 139 } 140 141 static struct fileIdentDesc *udf_find_entry(struct inode *dir, 142 const struct qstr *child, 143 struct udf_fileident_bh *fibh, 144 struct fileIdentDesc *cfi) 145 { 146 struct fileIdentDesc *fi = NULL; 147 loff_t f_pos; 148 int block, flen; 149 unsigned char *fname = NULL; 150 unsigned char *nameptr; 151 uint8_t lfi; 152 uint16_t liu; 153 loff_t size; 154 struct kernel_lb_addr eloc; 155 uint32_t elen; 156 sector_t offset; 157 struct extent_position epos = {}; 158 struct udf_inode_info *dinfo = UDF_I(dir); 159 int isdotdot = child->len == 2 && 160 child->name[0] == '.' && child->name[1] == '.'; 161 struct super_block *sb = dir->i_sb; 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 & (sb->s_blocksize - 1); 168 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 169 if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos, 170 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) 171 goto out_err; 172 block = udf_get_lb_pblock(sb, &eloc, offset); 173 if ((++offset << 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(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(sb, UDF_FLAG_UNDELETE)) 221 continue; 222 } 223 224 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { 225 if (!UDF_QUERY_FLAG(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(sb, nameptr, lfi, fname, UDF_NAME_LEN); 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 = d_inode(dentry->d_parent); 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 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); 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 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); 686 mark_inode_dirty(dir); 687 unlock_new_inode(inode); 688 d_instantiate(dentry, inode); 689 if (fibh.sbh != fibh.ebh) 690 brelse(fibh.ebh); 691 brelse(fibh.sbh); 692 err = 0; 693 694 out: 695 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 struct 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(struct short_ad); 723 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 724 epos.offset -= sizeof(struct 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 = d_inode(dentry); 771 struct udf_fileident_bh fibh; 772 struct fileIdentDesc *fi, cfi; 773 struct kernel_lb_addr tloc; 774 775 retval = -ENOENT; 776 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); 777 if (!fi) 778 goto out; 779 780 retval = -EIO; 781 tloc = lelb_to_cpu(cfi.icb.extLocation); 782 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) 783 goto end_rmdir; 784 retval = -ENOTEMPTY; 785 if (!empty_dir(inode)) 786 goto end_rmdir; 787 retval = udf_delete_entry(dir, fi, &fibh, &cfi); 788 if (retval) 789 goto end_rmdir; 790 if (inode->i_nlink != 2) 791 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n", 792 inode->i_nlink); 793 clear_nlink(inode); 794 inode->i_size = 0; 795 inode_dec_link_count(dir); 796 inode->i_ctime = dir->i_ctime = dir->i_mtime = 797 current_fs_time(dir->i_sb); 798 mark_inode_dirty(dir); 799 800 end_rmdir: 801 if (fibh.sbh != fibh.ebh) 802 brelse(fibh.ebh); 803 brelse(fibh.sbh); 804 805 out: 806 return retval; 807 } 808 809 static int udf_unlink(struct inode *dir, struct dentry *dentry) 810 { 811 int retval; 812 struct inode *inode = d_inode(dentry); 813 struct udf_fileident_bh fibh; 814 struct fileIdentDesc *fi; 815 struct fileIdentDesc cfi; 816 struct kernel_lb_addr tloc; 817 818 retval = -ENOENT; 819 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); 820 if (!fi) 821 goto out; 822 823 retval = -EIO; 824 tloc = lelb_to_cpu(cfi.icb.extLocation); 825 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) 826 goto end_unlink; 827 828 if (!inode->i_nlink) { 829 udf_debug("Deleting nonexistent file (%lu), %d\n", 830 inode->i_ino, inode->i_nlink); 831 set_nlink(inode, 1); 832 } 833 retval = udf_delete_entry(dir, fi, &fibh, &cfi); 834 if (retval) 835 goto end_unlink; 836 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); 837 mark_inode_dirty(dir); 838 inode_dec_link_count(inode); 839 inode->i_ctime = dir->i_ctime; 840 retval = 0; 841 842 end_unlink: 843 if (fibh.sbh != fibh.ebh) 844 brelse(fibh.ebh); 845 brelse(fibh.sbh); 846 847 out: 848 return retval; 849 } 850 851 static int udf_symlink(struct inode *dir, struct dentry *dentry, 852 const char *symname) 853 { 854 struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO); 855 struct pathComponent *pc; 856 const char *compstart; 857 struct extent_position epos = {}; 858 int eoffset, elen = 0; 859 uint8_t *ea; 860 int err; 861 int block; 862 unsigned char *name = NULL; 863 int namelen; 864 struct udf_inode_info *iinfo; 865 struct super_block *sb = dir->i_sb; 866 867 if (IS_ERR(inode)) 868 return PTR_ERR(inode); 869 870 iinfo = UDF_I(inode); 871 down_write(&iinfo->i_data_sem); 872 name = kmalloc(UDF_NAME_LEN, GFP_NOFS); 873 if (!name) { 874 err = -ENOMEM; 875 goto out_no_entry; 876 } 877 878 inode->i_data.a_ops = &udf_symlink_aops; 879 inode->i_op = &udf_symlink_inode_operations; 880 881 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 882 struct kernel_lb_addr eloc; 883 uint32_t bsize; 884 885 block = udf_new_block(sb, inode, 886 iinfo->i_location.partitionReferenceNum, 887 iinfo->i_location.logicalBlockNum, &err); 888 if (!block) 889 goto out_no_entry; 890 epos.block = iinfo->i_location; 891 epos.offset = udf_file_entry_alloc_offset(inode); 892 epos.bh = NULL; 893 eloc.logicalBlockNum = block; 894 eloc.partitionReferenceNum = 895 iinfo->i_location.partitionReferenceNum; 896 bsize = sb->s_blocksize; 897 iinfo->i_lenExtents = bsize; 898 udf_add_aext(inode, &epos, &eloc, bsize, 0); 899 brelse(epos.bh); 900 901 block = udf_get_pblock(sb, block, 902 iinfo->i_location.partitionReferenceNum, 903 0); 904 epos.bh = udf_tgetblk(sb, block); 905 lock_buffer(epos.bh); 906 memset(epos.bh->b_data, 0x00, bsize); 907 set_buffer_uptodate(epos.bh); 908 unlock_buffer(epos.bh); 909 mark_buffer_dirty_inode(epos.bh, inode); 910 ea = epos.bh->b_data + udf_ext0_offset(inode); 911 } else 912 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; 913 914 eoffset = sb->s_blocksize - udf_ext0_offset(inode); 915 pc = (struct pathComponent *)ea; 916 917 if (*symname == '/') { 918 do { 919 symname++; 920 } while (*symname == '/'); 921 922 pc->componentType = 1; 923 pc->lengthComponentIdent = 0; 924 pc->componentFileVersionNum = 0; 925 elen += sizeof(struct pathComponent); 926 } 927 928 err = -ENAMETOOLONG; 929 930 while (*symname) { 931 if (elen + sizeof(struct pathComponent) > eoffset) 932 goto out_no_entry; 933 934 pc = (struct pathComponent *)(ea + elen); 935 936 compstart = symname; 937 938 do { 939 symname++; 940 } while (*symname && *symname != '/'); 941 942 pc->componentType = 5; 943 pc->lengthComponentIdent = 0; 944 pc->componentFileVersionNum = 0; 945 if (compstart[0] == '.') { 946 if ((symname - compstart) == 1) 947 pc->componentType = 4; 948 else if ((symname - compstart) == 2 && 949 compstart[1] == '.') 950 pc->componentType = 3; 951 } 952 953 if (pc->componentType == 5) { 954 namelen = udf_put_filename(sb, compstart, name, 955 symname - compstart); 956 if (!namelen) 957 goto out_no_entry; 958 959 if (elen + sizeof(struct pathComponent) + namelen > 960 eoffset) 961 goto out_no_entry; 962 else 963 pc->lengthComponentIdent = namelen; 964 965 memcpy(pc->componentIdent, name, namelen); 966 } 967 968 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; 969 970 if (*symname) { 971 do { 972 symname++; 973 } while (*symname == '/'); 974 } 975 } 976 977 brelse(epos.bh); 978 inode->i_size = elen; 979 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 980 iinfo->i_lenAlloc = inode->i_size; 981 else 982 udf_truncate_tail_extent(inode); 983 mark_inode_dirty(inode); 984 up_write(&iinfo->i_data_sem); 985 986 err = udf_add_nondir(dentry, inode); 987 out: 988 kfree(name); 989 return err; 990 991 out_no_entry: 992 up_write(&iinfo->i_data_sem); 993 inode_dec_link_count(inode); 994 unlock_new_inode(inode); 995 iput(inode); 996 goto out; 997 } 998 999 static int udf_link(struct dentry *old_dentry, struct inode *dir, 1000 struct dentry *dentry) 1001 { 1002 struct inode *inode = d_inode(old_dentry); 1003 struct udf_fileident_bh fibh; 1004 struct fileIdentDesc cfi, *fi; 1005 int err; 1006 1007 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 1008 if (!fi) { 1009 return err; 1010 } 1011 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 1012 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); 1013 if (UDF_SB(inode->i_sb)->s_lvid_bh) { 1014 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 1015 cpu_to_le32(lvid_get_unique_id(inode->i_sb)); 1016 } 1017 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 1018 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1019 mark_inode_dirty(dir); 1020 1021 if (fibh.sbh != fibh.ebh) 1022 brelse(fibh.ebh); 1023 brelse(fibh.sbh); 1024 inc_nlink(inode); 1025 inode->i_ctime = current_fs_time(inode->i_sb); 1026 mark_inode_dirty(inode); 1027 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); 1028 mark_inode_dirty(dir); 1029 ihold(inode); 1030 d_instantiate(dentry, inode); 1031 1032 return 0; 1033 } 1034 1035 /* Anybody can rename anything with this: the permission checks are left to the 1036 * higher-level routines. 1037 */ 1038 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, 1039 struct inode *new_dir, struct dentry *new_dentry) 1040 { 1041 struct inode *old_inode = d_inode(old_dentry); 1042 struct inode *new_inode = d_inode(new_dentry); 1043 struct udf_fileident_bh ofibh, nfibh; 1044 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; 1045 struct fileIdentDesc ocfi, ncfi; 1046 struct buffer_head *dir_bh = NULL; 1047 int retval = -ENOENT; 1048 struct kernel_lb_addr tloc; 1049 struct udf_inode_info *old_iinfo = UDF_I(old_inode); 1050 1051 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); 1052 if (ofi) { 1053 if (ofibh.sbh != ofibh.ebh) 1054 brelse(ofibh.ebh); 1055 brelse(ofibh.sbh); 1056 } 1057 tloc = lelb_to_cpu(ocfi.icb.extLocation); 1058 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) 1059 != old_inode->i_ino) 1060 goto end_rename; 1061 1062 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); 1063 if (nfi) { 1064 if (!new_inode) { 1065 if (nfibh.sbh != nfibh.ebh) 1066 brelse(nfibh.ebh); 1067 brelse(nfibh.sbh); 1068 nfi = NULL; 1069 } 1070 } 1071 if (S_ISDIR(old_inode->i_mode)) { 1072 int offset = udf_ext0_offset(old_inode); 1073 1074 if (new_inode) { 1075 retval = -ENOTEMPTY; 1076 if (!empty_dir(new_inode)) 1077 goto end_rename; 1078 } 1079 retval = -EIO; 1080 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1081 dir_fi = udf_get_fileident( 1082 old_iinfo->i_ext.i_data - 1083 (old_iinfo->i_efe ? 1084 sizeof(struct extendedFileEntry) : 1085 sizeof(struct fileEntry)), 1086 old_inode->i_sb->s_blocksize, &offset); 1087 } else { 1088 dir_bh = udf_bread(old_inode, 0, 0, &retval); 1089 if (!dir_bh) 1090 goto end_rename; 1091 dir_fi = udf_get_fileident(dir_bh->b_data, 1092 old_inode->i_sb->s_blocksize, &offset); 1093 } 1094 if (!dir_fi) 1095 goto end_rename; 1096 tloc = lelb_to_cpu(dir_fi->icb.extLocation); 1097 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != 1098 old_dir->i_ino) 1099 goto end_rename; 1100 } 1101 if (!nfi) { 1102 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, 1103 &retval); 1104 if (!nfi) 1105 goto end_rename; 1106 } 1107 1108 /* 1109 * Like most other Unix systems, set the ctime for inodes on a 1110 * rename. 1111 */ 1112 old_inode->i_ctime = current_fs_time(old_inode->i_sb); 1113 mark_inode_dirty(old_inode); 1114 1115 /* 1116 * ok, that's it 1117 */ 1118 ncfi.fileVersionNum = ocfi.fileVersionNum; 1119 ncfi.fileCharacteristics = ocfi.fileCharacteristics; 1120 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); 1121 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); 1122 1123 /* The old fid may have moved - find it again */ 1124 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); 1125 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); 1126 1127 if (new_inode) { 1128 new_inode->i_ctime = current_fs_time(new_inode->i_sb); 1129 inode_dec_link_count(new_inode); 1130 } 1131 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); 1132 new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb); 1133 mark_inode_dirty(old_dir); 1134 mark_inode_dirty(new_dir); 1135 1136 if (dir_fi) { 1137 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); 1138 udf_update_tag((char *)dir_fi, 1139 (sizeof(struct fileIdentDesc) + 1140 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); 1141 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1142 mark_inode_dirty(old_inode); 1143 else 1144 mark_buffer_dirty_inode(dir_bh, old_inode); 1145 1146 inode_dec_link_count(old_dir); 1147 if (new_inode) 1148 inode_dec_link_count(new_inode); 1149 else { 1150 inc_nlink(new_dir); 1151 mark_inode_dirty(new_dir); 1152 } 1153 } 1154 1155 if (ofi) { 1156 if (ofibh.sbh != ofibh.ebh) 1157 brelse(ofibh.ebh); 1158 brelse(ofibh.sbh); 1159 } 1160 1161 retval = 0; 1162 1163 end_rename: 1164 brelse(dir_bh); 1165 if (nfi) { 1166 if (nfibh.sbh != nfibh.ebh) 1167 brelse(nfibh.ebh); 1168 brelse(nfibh.sbh); 1169 } 1170 1171 return retval; 1172 } 1173 1174 static struct dentry *udf_get_parent(struct dentry *child) 1175 { 1176 struct kernel_lb_addr tloc; 1177 struct inode *inode = NULL; 1178 struct qstr dotdot = QSTR_INIT("..", 2); 1179 struct fileIdentDesc cfi; 1180 struct udf_fileident_bh fibh; 1181 1182 if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi)) 1183 return ERR_PTR(-EACCES); 1184 1185 if (fibh.sbh != fibh.ebh) 1186 brelse(fibh.ebh); 1187 brelse(fibh.sbh); 1188 1189 tloc = lelb_to_cpu(cfi.icb.extLocation); 1190 inode = udf_iget(d_inode(child)->i_sb, &tloc); 1191 if (IS_ERR(inode)) 1192 return ERR_CAST(inode); 1193 1194 return d_obtain_alias(inode); 1195 } 1196 1197 1198 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, 1199 u16 partref, __u32 generation) 1200 { 1201 struct inode *inode; 1202 struct kernel_lb_addr loc; 1203 1204 if (block == 0) 1205 return ERR_PTR(-ESTALE); 1206 1207 loc.logicalBlockNum = block; 1208 loc.partitionReferenceNum = partref; 1209 inode = udf_iget(sb, &loc); 1210 1211 if (IS_ERR(inode)) 1212 return ERR_CAST(inode); 1213 1214 if (generation && inode->i_generation != generation) { 1215 iput(inode); 1216 return ERR_PTR(-ESTALE); 1217 } 1218 return d_obtain_alias(inode); 1219 } 1220 1221 static struct dentry *udf_fh_to_dentry(struct super_block *sb, 1222 struct fid *fid, int fh_len, int fh_type) 1223 { 1224 if ((fh_len != 3 && fh_len != 5) || 1225 (fh_type != FILEID_UDF_WITH_PARENT && 1226 fh_type != FILEID_UDF_WITHOUT_PARENT)) 1227 return NULL; 1228 1229 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, 1230 fid->udf.generation); 1231 } 1232 1233 static struct dentry *udf_fh_to_parent(struct super_block *sb, 1234 struct fid *fid, int fh_len, int fh_type) 1235 { 1236 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) 1237 return NULL; 1238 1239 return udf_nfs_get_inode(sb, fid->udf.parent_block, 1240 fid->udf.parent_partref, 1241 fid->udf.parent_generation); 1242 } 1243 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp, 1244 struct inode *parent) 1245 { 1246 int len = *lenp; 1247 struct kernel_lb_addr location = UDF_I(inode)->i_location; 1248 struct fid *fid = (struct fid *)fh; 1249 int type = FILEID_UDF_WITHOUT_PARENT; 1250 1251 if (parent && (len < 5)) { 1252 *lenp = 5; 1253 return FILEID_INVALID; 1254 } else if (len < 3) { 1255 *lenp = 3; 1256 return FILEID_INVALID; 1257 } 1258 1259 *lenp = 3; 1260 fid->udf.block = location.logicalBlockNum; 1261 fid->udf.partref = location.partitionReferenceNum; 1262 fid->udf.parent_partref = 0; 1263 fid->udf.generation = inode->i_generation; 1264 1265 if (parent) { 1266 location = UDF_I(parent)->i_location; 1267 fid->udf.parent_block = location.logicalBlockNum; 1268 fid->udf.parent_partref = location.partitionReferenceNum; 1269 fid->udf.parent_generation = inode->i_generation; 1270 *lenp = 5; 1271 type = FILEID_UDF_WITH_PARENT; 1272 } 1273 1274 return type; 1275 } 1276 1277 const struct export_operations udf_export_ops = { 1278 .encode_fh = udf_encode_fh, 1279 .fh_to_dentry = udf_fh_to_dentry, 1280 .fh_to_parent = udf_fh_to_parent, 1281 .get_parent = udf_get_parent, 1282 }; 1283 1284 const struct inode_operations udf_dir_inode_operations = { 1285 .lookup = udf_lookup, 1286 .create = udf_create, 1287 .link = udf_link, 1288 .unlink = udf_unlink, 1289 .symlink = udf_symlink, 1290 .mkdir = udf_mkdir, 1291 .rmdir = udf_rmdir, 1292 .mknod = udf_mknod, 1293 .rename = udf_rename, 1294 .tmpfile = udf_tmpfile, 1295 }; 1296 const struct inode_operations udf_symlink_inode_operations = { 1297 .readlink = generic_readlink, 1298 .follow_link = page_follow_link_light, 1299 .put_link = page_put_link, 1300 }; 1301