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 struct super_block *sb = dir->i_sb; 163 164 size = udf_ext0_offset(dir) + dir->i_size; 165 f_pos = udf_ext0_offset(dir); 166 167 fibh->sbh = fibh->ebh = NULL; 168 fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1); 169 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 170 if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos, 171 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) 172 goto out_err; 173 block = udf_get_lb_pblock(sb, &eloc, offset); 174 if ((++offset << sb->s_blocksize_bits) < elen) { 175 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 176 epos.offset -= sizeof(struct short_ad); 177 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 178 epos.offset -= sizeof(struct long_ad); 179 } else 180 offset = 0; 181 182 fibh->sbh = fibh->ebh = udf_tread(sb, block); 183 if (!fibh->sbh) 184 goto out_err; 185 } 186 187 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); 188 if (!fname) 189 goto out_err; 190 191 while (f_pos < size) { 192 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, 193 &elen, &offset); 194 if (!fi) 195 goto out_err; 196 197 liu = le16_to_cpu(cfi->lengthOfImpUse); 198 lfi = cfi->lengthFileIdent; 199 200 if (fibh->sbh == fibh->ebh) { 201 nameptr = fi->fileIdent + liu; 202 } else { 203 int poffset; /* Unpaded ending offset */ 204 205 poffset = fibh->soffset + sizeof(struct fileIdentDesc) + 206 liu + lfi; 207 208 if (poffset >= lfi) 209 nameptr = (uint8_t *)(fibh->ebh->b_data + 210 poffset - lfi); 211 else { 212 nameptr = fname; 213 memcpy(nameptr, fi->fileIdent + liu, 214 lfi - poffset); 215 memcpy(nameptr + lfi - poffset, 216 fibh->ebh->b_data, poffset); 217 } 218 } 219 220 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { 221 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) 222 continue; 223 } 224 225 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { 226 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) 227 continue; 228 } 229 230 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && 231 isdotdot) 232 goto out_ok; 233 234 if (!lfi) 235 continue; 236 237 flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN); 238 if (flen && udf_match(flen, fname, child->len, child->name)) 239 goto out_ok; 240 } 241 242 out_err: 243 fi = NULL; 244 if (fibh->sbh != fibh->ebh) 245 brelse(fibh->ebh); 246 brelse(fibh->sbh); 247 out_ok: 248 brelse(epos.bh); 249 kfree(fname); 250 251 return fi; 252 } 253 254 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, 255 unsigned int flags) 256 { 257 struct inode *inode = NULL; 258 struct fileIdentDesc cfi; 259 struct udf_fileident_bh fibh; 260 261 if (dentry->d_name.len > UDF_NAME_LEN - 2) 262 return ERR_PTR(-ENAMETOOLONG); 263 264 #ifdef UDF_RECOVERY 265 /* temporary shorthand for specifying files by inode number */ 266 if (!strncmp(dentry->d_name.name, ".B=", 3)) { 267 struct kernel_lb_addr lb = { 268 .logicalBlockNum = 0, 269 .partitionReferenceNum = 270 simple_strtoul(dentry->d_name.name + 3, 271 NULL, 0), 272 }; 273 inode = udf_iget(dir->i_sb, lb); 274 if (IS_ERR(inode)) 275 return inode; 276 } else 277 #endif /* UDF_RECOVERY */ 278 279 if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { 280 struct kernel_lb_addr loc; 281 282 if (fibh.sbh != fibh.ebh) 283 brelse(fibh.ebh); 284 brelse(fibh.sbh); 285 286 loc = lelb_to_cpu(cfi.icb.extLocation); 287 inode = udf_iget(dir->i_sb, &loc); 288 if (IS_ERR(inode)) 289 return ERR_CAST(inode); 290 } 291 292 return d_splice_alias(inode, dentry); 293 } 294 295 static struct fileIdentDesc *udf_add_entry(struct inode *dir, 296 struct dentry *dentry, 297 struct udf_fileident_bh *fibh, 298 struct fileIdentDesc *cfi, int *err) 299 { 300 struct super_block *sb = dir->i_sb; 301 struct fileIdentDesc *fi = NULL; 302 unsigned char *name = NULL; 303 int namelen; 304 loff_t f_pos; 305 loff_t size = udf_ext0_offset(dir) + dir->i_size; 306 int nfidlen; 307 uint8_t lfi; 308 uint16_t liu; 309 int block; 310 struct kernel_lb_addr eloc; 311 uint32_t elen = 0; 312 sector_t offset; 313 struct extent_position epos = {}; 314 struct udf_inode_info *dinfo; 315 316 fibh->sbh = fibh->ebh = NULL; 317 name = kmalloc(UDF_NAME_LEN, GFP_NOFS); 318 if (!name) { 319 *err = -ENOMEM; 320 goto out_err; 321 } 322 323 if (dentry) { 324 if (!dentry->d_name.len) { 325 *err = -EINVAL; 326 goto out_err; 327 } 328 namelen = udf_put_filename(sb, dentry->d_name.name, name, 329 dentry->d_name.len); 330 if (!namelen) { 331 *err = -ENAMETOOLONG; 332 goto out_err; 333 } 334 } else { 335 namelen = 0; 336 } 337 338 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; 339 340 f_pos = udf_ext0_offset(dir); 341 342 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); 343 dinfo = UDF_I(dir); 344 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 345 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, 346 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { 347 block = udf_get_lb_pblock(dir->i_sb, 348 &dinfo->i_location, 0); 349 fibh->soffset = fibh->eoffset = sb->s_blocksize; 350 goto add; 351 } 352 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); 353 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { 354 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 355 epos.offset -= sizeof(struct short_ad); 356 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 357 epos.offset -= sizeof(struct long_ad); 358 } else 359 offset = 0; 360 361 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); 362 if (!fibh->sbh) { 363 *err = -EIO; 364 goto out_err; 365 } 366 367 block = dinfo->i_location.logicalBlockNum; 368 } 369 370 while (f_pos < size) { 371 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, 372 &elen, &offset); 373 374 if (!fi) { 375 *err = -EIO; 376 goto out_err; 377 } 378 379 liu = le16_to_cpu(cfi->lengthOfImpUse); 380 lfi = cfi->lengthFileIdent; 381 382 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { 383 if (((sizeof(struct fileIdentDesc) + 384 liu + lfi + 3) & ~3) == nfidlen) { 385 cfi->descTag.tagSerialNum = cpu_to_le16(1); 386 cfi->fileVersionNum = cpu_to_le16(1); 387 cfi->fileCharacteristics = 0; 388 cfi->lengthFileIdent = namelen; 389 cfi->lengthOfImpUse = cpu_to_le16(0); 390 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, 391 name)) 392 goto out_ok; 393 else { 394 *err = -EIO; 395 goto out_err; 396 } 397 } 398 } 399 } 400 401 add: 402 f_pos += nfidlen; 403 404 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && 405 sb->s_blocksize - fibh->eoffset < nfidlen) { 406 brelse(epos.bh); 407 epos.bh = NULL; 408 fibh->soffset -= udf_ext0_offset(dir); 409 fibh->eoffset -= udf_ext0_offset(dir); 410 f_pos -= udf_ext0_offset(dir); 411 if (fibh->sbh != fibh->ebh) 412 brelse(fibh->ebh); 413 brelse(fibh->sbh); 414 fibh->sbh = fibh->ebh = 415 udf_expand_dir_adinicb(dir, &block, err); 416 if (!fibh->sbh) 417 goto out_err; 418 epos.block = dinfo->i_location; 419 epos.offset = udf_file_entry_alloc_offset(dir); 420 /* Load extent udf_expand_dir_adinicb() has created */ 421 udf_current_aext(dir, &epos, &eloc, &elen, 1); 422 } 423 424 /* Entry fits into current block? */ 425 if (sb->s_blocksize - fibh->eoffset >= nfidlen) { 426 fibh->soffset = fibh->eoffset; 427 fibh->eoffset += nfidlen; 428 if (fibh->sbh != fibh->ebh) { 429 brelse(fibh->sbh); 430 fibh->sbh = fibh->ebh; 431 } 432 433 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 434 block = dinfo->i_location.logicalBlockNum; 435 fi = (struct fileIdentDesc *) 436 (dinfo->i_ext.i_data + 437 fibh->soffset - 438 udf_ext0_offset(dir) + 439 dinfo->i_lenEAttr); 440 } else { 441 block = eloc.logicalBlockNum + 442 ((elen - 1) >> 443 dir->i_sb->s_blocksize_bits); 444 fi = (struct fileIdentDesc *) 445 (fibh->sbh->b_data + fibh->soffset); 446 } 447 } else { 448 /* Round up last extent in the file */ 449 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); 450 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 451 epos.offset -= sizeof(struct short_ad); 452 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 453 epos.offset -= sizeof(struct long_ad); 454 udf_write_aext(dir, &epos, &eloc, elen, 1); 455 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize 456 - 1) & ~(sb->s_blocksize - 1); 457 458 fibh->soffset = fibh->eoffset - sb->s_blocksize; 459 fibh->eoffset += nfidlen - sb->s_blocksize; 460 if (fibh->sbh != fibh->ebh) { 461 brelse(fibh->sbh); 462 fibh->sbh = fibh->ebh; 463 } 464 465 block = eloc.logicalBlockNum + ((elen - 1) >> 466 dir->i_sb->s_blocksize_bits); 467 fibh->ebh = udf_bread(dir, 468 f_pos >> dir->i_sb->s_blocksize_bits, 1, err); 469 if (!fibh->ebh) 470 goto out_err; 471 /* Extents could have been merged, invalidate our position */ 472 brelse(epos.bh); 473 epos.bh = NULL; 474 epos.block = dinfo->i_location; 475 epos.offset = udf_file_entry_alloc_offset(dir); 476 477 if (!fibh->soffset) { 478 /* Find the freshly allocated block */ 479 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == 480 (EXT_RECORDED_ALLOCATED >> 30)) 481 ; 482 block = eloc.logicalBlockNum + ((elen - 1) >> 483 dir->i_sb->s_blocksize_bits); 484 brelse(fibh->sbh); 485 fibh->sbh = fibh->ebh; 486 fi = (struct fileIdentDesc *)(fibh->sbh->b_data); 487 } else { 488 fi = (struct fileIdentDesc *) 489 (fibh->sbh->b_data + sb->s_blocksize + 490 fibh->soffset); 491 } 492 } 493 494 memset(cfi, 0, sizeof(struct fileIdentDesc)); 495 if (UDF_SB(sb)->s_udfrev >= 0x0200) 496 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, 497 sizeof(struct tag)); 498 else 499 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, 500 sizeof(struct tag)); 501 cfi->fileVersionNum = cpu_to_le16(1); 502 cfi->lengthFileIdent = namelen; 503 cfi->lengthOfImpUse = cpu_to_le16(0); 504 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { 505 dir->i_size += nfidlen; 506 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 507 dinfo->i_lenAlloc += nfidlen; 508 else { 509 /* Find the last extent and truncate it to proper size */ 510 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == 511 (EXT_RECORDED_ALLOCATED >> 30)) 512 ; 513 elen -= dinfo->i_lenExtents - dir->i_size; 514 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 515 epos.offset -= sizeof(struct short_ad); 516 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 517 epos.offset -= sizeof(struct long_ad); 518 udf_write_aext(dir, &epos, &eloc, elen, 1); 519 dinfo->i_lenExtents = dir->i_size; 520 } 521 522 mark_inode_dirty(dir); 523 goto out_ok; 524 } else { 525 *err = -EIO; 526 goto out_err; 527 } 528 529 out_err: 530 fi = NULL; 531 if (fibh->sbh != fibh->ebh) 532 brelse(fibh->ebh); 533 brelse(fibh->sbh); 534 out_ok: 535 brelse(epos.bh); 536 kfree(name); 537 return fi; 538 } 539 540 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, 541 struct udf_fileident_bh *fibh, 542 struct fileIdentDesc *cfi) 543 { 544 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; 545 546 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) 547 memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); 548 549 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); 550 } 551 552 static int udf_add_nondir(struct dentry *dentry, struct inode *inode) 553 { 554 struct udf_inode_info *iinfo = UDF_I(inode); 555 struct inode *dir = dentry->d_parent->d_inode; 556 struct udf_fileident_bh fibh; 557 struct fileIdentDesc cfi, *fi; 558 int err; 559 560 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 561 if (unlikely(!fi)) { 562 inode_dec_link_count(inode); 563 unlock_new_inode(inode); 564 iput(inode); 565 return err; 566 } 567 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 568 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 569 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 570 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); 571 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 572 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 573 mark_inode_dirty(dir); 574 if (fibh.sbh != fibh.ebh) 575 brelse(fibh.ebh); 576 brelse(fibh.sbh); 577 unlock_new_inode(inode); 578 d_instantiate(dentry, inode); 579 580 return 0; 581 } 582 583 static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode, 584 bool excl) 585 { 586 struct inode *inode = udf_new_inode(dir, mode); 587 588 if (IS_ERR(inode)) 589 return PTR_ERR(inode); 590 591 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 592 inode->i_data.a_ops = &udf_adinicb_aops; 593 else 594 inode->i_data.a_ops = &udf_aops; 595 inode->i_op = &udf_file_inode_operations; 596 inode->i_fop = &udf_file_operations; 597 mark_inode_dirty(inode); 598 599 return udf_add_nondir(dentry, inode); 600 } 601 602 static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) 603 { 604 struct inode *inode = udf_new_inode(dir, mode); 605 606 if (IS_ERR(inode)) 607 return PTR_ERR(inode); 608 609 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 610 inode->i_data.a_ops = &udf_adinicb_aops; 611 else 612 inode->i_data.a_ops = &udf_aops; 613 inode->i_op = &udf_file_inode_operations; 614 inode->i_fop = &udf_file_operations; 615 mark_inode_dirty(inode); 616 d_tmpfile(dentry, inode); 617 unlock_new_inode(inode); 618 return 0; 619 } 620 621 static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 622 dev_t rdev) 623 { 624 struct inode *inode; 625 626 if (!old_valid_dev(rdev)) 627 return -EINVAL; 628 629 inode = udf_new_inode(dir, mode); 630 if (IS_ERR(inode)) 631 return PTR_ERR(inode); 632 633 init_special_inode(inode, mode, rdev); 634 return udf_add_nondir(dentry, inode); 635 } 636 637 static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 638 { 639 struct inode *inode; 640 struct udf_fileident_bh fibh; 641 struct fileIdentDesc cfi, *fi; 642 int err; 643 struct udf_inode_info *dinfo = UDF_I(dir); 644 struct udf_inode_info *iinfo; 645 646 inode = udf_new_inode(dir, S_IFDIR | mode); 647 if (IS_ERR(inode)) 648 return PTR_ERR(inode); 649 650 iinfo = UDF_I(inode); 651 inode->i_op = &udf_dir_inode_operations; 652 inode->i_fop = &udf_dir_operations; 653 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); 654 if (!fi) { 655 inode_dec_link_count(inode); 656 unlock_new_inode(inode); 657 iput(inode); 658 goto out; 659 } 660 set_nlink(inode, 2); 661 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 662 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); 663 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 664 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); 665 cfi.fileCharacteristics = 666 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; 667 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); 668 brelse(fibh.sbh); 669 mark_inode_dirty(inode); 670 671 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); 672 if (!fi) { 673 clear_nlink(inode); 674 mark_inode_dirty(inode); 675 unlock_new_inode(inode); 676 iput(inode); 677 goto out; 678 } 679 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); 680 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); 681 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = 682 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); 683 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; 684 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); 685 inc_nlink(dir); 686 mark_inode_dirty(dir); 687 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 = dentry->d_inode; 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 = dentry->d_inode; 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 = old_dentry->d_inode; 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 ihold(inode); 1028 d_instantiate(dentry, inode); 1029 1030 return 0; 1031 } 1032 1033 /* Anybody can rename anything with this: the permission checks are left to the 1034 * higher-level routines. 1035 */ 1036 static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, 1037 struct inode *new_dir, struct dentry *new_dentry) 1038 { 1039 struct inode *old_inode = old_dentry->d_inode; 1040 struct inode *new_inode = new_dentry->d_inode; 1041 struct udf_fileident_bh ofibh, nfibh; 1042 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; 1043 struct fileIdentDesc ocfi, ncfi; 1044 struct buffer_head *dir_bh = NULL; 1045 int retval = -ENOENT; 1046 struct kernel_lb_addr tloc; 1047 struct udf_inode_info *old_iinfo = UDF_I(old_inode); 1048 1049 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); 1050 if (ofi) { 1051 if (ofibh.sbh != ofibh.ebh) 1052 brelse(ofibh.ebh); 1053 brelse(ofibh.sbh); 1054 } 1055 tloc = lelb_to_cpu(ocfi.icb.extLocation); 1056 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) 1057 != old_inode->i_ino) 1058 goto end_rename; 1059 1060 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); 1061 if (nfi) { 1062 if (!new_inode) { 1063 if (nfibh.sbh != nfibh.ebh) 1064 brelse(nfibh.ebh); 1065 brelse(nfibh.sbh); 1066 nfi = NULL; 1067 } 1068 } 1069 if (S_ISDIR(old_inode->i_mode)) { 1070 int offset = udf_ext0_offset(old_inode); 1071 1072 if (new_inode) { 1073 retval = -ENOTEMPTY; 1074 if (!empty_dir(new_inode)) 1075 goto end_rename; 1076 } 1077 retval = -EIO; 1078 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1079 dir_fi = udf_get_fileident( 1080 old_iinfo->i_ext.i_data - 1081 (old_iinfo->i_efe ? 1082 sizeof(struct extendedFileEntry) : 1083 sizeof(struct fileEntry)), 1084 old_inode->i_sb->s_blocksize, &offset); 1085 } else { 1086 dir_bh = udf_bread(old_inode, 0, 0, &retval); 1087 if (!dir_bh) 1088 goto end_rename; 1089 dir_fi = udf_get_fileident(dir_bh->b_data, 1090 old_inode->i_sb->s_blocksize, &offset); 1091 } 1092 if (!dir_fi) 1093 goto end_rename; 1094 tloc = lelb_to_cpu(dir_fi->icb.extLocation); 1095 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != 1096 old_dir->i_ino) 1097 goto end_rename; 1098 } 1099 if (!nfi) { 1100 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, 1101 &retval); 1102 if (!nfi) 1103 goto end_rename; 1104 } 1105 1106 /* 1107 * Like most other Unix systems, set the ctime for inodes on a 1108 * rename. 1109 */ 1110 old_inode->i_ctime = current_fs_time(old_inode->i_sb); 1111 mark_inode_dirty(old_inode); 1112 1113 /* 1114 * ok, that's it 1115 */ 1116 ncfi.fileVersionNum = ocfi.fileVersionNum; 1117 ncfi.fileCharacteristics = ocfi.fileCharacteristics; 1118 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); 1119 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); 1120 1121 /* The old fid may have moved - find it again */ 1122 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); 1123 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); 1124 1125 if (new_inode) { 1126 new_inode->i_ctime = current_fs_time(new_inode->i_sb); 1127 inode_dec_link_count(new_inode); 1128 } 1129 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); 1130 mark_inode_dirty(old_dir); 1131 1132 if (dir_fi) { 1133 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); 1134 udf_update_tag((char *)dir_fi, 1135 (sizeof(struct fileIdentDesc) + 1136 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); 1137 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1138 mark_inode_dirty(old_inode); 1139 else 1140 mark_buffer_dirty_inode(dir_bh, old_inode); 1141 1142 inode_dec_link_count(old_dir); 1143 if (new_inode) 1144 inode_dec_link_count(new_inode); 1145 else { 1146 inc_nlink(new_dir); 1147 mark_inode_dirty(new_dir); 1148 } 1149 } 1150 1151 if (ofi) { 1152 if (ofibh.sbh != ofibh.ebh) 1153 brelse(ofibh.ebh); 1154 brelse(ofibh.sbh); 1155 } 1156 1157 retval = 0; 1158 1159 end_rename: 1160 brelse(dir_bh); 1161 if (nfi) { 1162 if (nfibh.sbh != nfibh.ebh) 1163 brelse(nfibh.ebh); 1164 brelse(nfibh.sbh); 1165 } 1166 1167 return retval; 1168 } 1169 1170 static struct dentry *udf_get_parent(struct dentry *child) 1171 { 1172 struct kernel_lb_addr tloc; 1173 struct inode *inode = NULL; 1174 struct qstr dotdot = QSTR_INIT("..", 2); 1175 struct fileIdentDesc cfi; 1176 struct udf_fileident_bh fibh; 1177 1178 if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) 1179 return ERR_PTR(-EACCES); 1180 1181 if (fibh.sbh != fibh.ebh) 1182 brelse(fibh.ebh); 1183 brelse(fibh.sbh); 1184 1185 tloc = lelb_to_cpu(cfi.icb.extLocation); 1186 inode = udf_iget(child->d_inode->i_sb, &tloc); 1187 if (IS_ERR(inode)) 1188 return ERR_CAST(inode); 1189 1190 return d_obtain_alias(inode); 1191 } 1192 1193 1194 static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, 1195 u16 partref, __u32 generation) 1196 { 1197 struct inode *inode; 1198 struct kernel_lb_addr loc; 1199 1200 if (block == 0) 1201 return ERR_PTR(-ESTALE); 1202 1203 loc.logicalBlockNum = block; 1204 loc.partitionReferenceNum = partref; 1205 inode = udf_iget(sb, &loc); 1206 1207 if (IS_ERR(inode)) 1208 return ERR_CAST(inode); 1209 1210 if (generation && inode->i_generation != generation) { 1211 iput(inode); 1212 return ERR_PTR(-ESTALE); 1213 } 1214 return d_obtain_alias(inode); 1215 } 1216 1217 static struct dentry *udf_fh_to_dentry(struct super_block *sb, 1218 struct fid *fid, int fh_len, int fh_type) 1219 { 1220 if ((fh_len != 3 && fh_len != 5) || 1221 (fh_type != FILEID_UDF_WITH_PARENT && 1222 fh_type != FILEID_UDF_WITHOUT_PARENT)) 1223 return NULL; 1224 1225 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, 1226 fid->udf.generation); 1227 } 1228 1229 static struct dentry *udf_fh_to_parent(struct super_block *sb, 1230 struct fid *fid, int fh_len, int fh_type) 1231 { 1232 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) 1233 return NULL; 1234 1235 return udf_nfs_get_inode(sb, fid->udf.parent_block, 1236 fid->udf.parent_partref, 1237 fid->udf.parent_generation); 1238 } 1239 static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp, 1240 struct inode *parent) 1241 { 1242 int len = *lenp; 1243 struct kernel_lb_addr location = UDF_I(inode)->i_location; 1244 struct fid *fid = (struct fid *)fh; 1245 int type = FILEID_UDF_WITHOUT_PARENT; 1246 1247 if (parent && (len < 5)) { 1248 *lenp = 5; 1249 return FILEID_INVALID; 1250 } else if (len < 3) { 1251 *lenp = 3; 1252 return FILEID_INVALID; 1253 } 1254 1255 *lenp = 3; 1256 fid->udf.block = location.logicalBlockNum; 1257 fid->udf.partref = location.partitionReferenceNum; 1258 fid->udf.parent_partref = 0; 1259 fid->udf.generation = inode->i_generation; 1260 1261 if (parent) { 1262 location = UDF_I(parent)->i_location; 1263 fid->udf.parent_block = location.logicalBlockNum; 1264 fid->udf.parent_partref = location.partitionReferenceNum; 1265 fid->udf.parent_generation = inode->i_generation; 1266 *lenp = 5; 1267 type = FILEID_UDF_WITH_PARENT; 1268 } 1269 1270 return type; 1271 } 1272 1273 const struct export_operations udf_export_ops = { 1274 .encode_fh = udf_encode_fh, 1275 .fh_to_dentry = udf_fh_to_dentry, 1276 .fh_to_parent = udf_fh_to_parent, 1277 .get_parent = udf_get_parent, 1278 }; 1279 1280 const struct inode_operations udf_dir_inode_operations = { 1281 .lookup = udf_lookup, 1282 .create = udf_create, 1283 .link = udf_link, 1284 .unlink = udf_unlink, 1285 .symlink = udf_symlink, 1286 .mkdir = udf_mkdir, 1287 .rmdir = udf_rmdir, 1288 .mknod = udf_mknod, 1289 .rename = udf_rename, 1290 .tmpfile = udf_tmpfile, 1291 }; 1292 const struct inode_operations udf_symlink_inode_operations = { 1293 .readlink = generic_readlink, 1294 .follow_link = page_follow_link_light, 1295 .put_link = page_put_link, 1296 }; 1297