1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. 4 */ 5 6 #include <linux/iversion.h> 7 #include <linux/namei.h> 8 #include <linux/slab.h> 9 #include <linux/buffer_head.h> 10 #include <linux/nls.h> 11 12 #include "exfat_raw.h" 13 #include "exfat_fs.h" 14 15 static inline unsigned long exfat_d_version(struct dentry *dentry) 16 { 17 return (unsigned long) dentry->d_fsdata; 18 } 19 20 static inline void exfat_d_version_set(struct dentry *dentry, 21 unsigned long version) 22 { 23 dentry->d_fsdata = (void *) version; 24 } 25 26 /* 27 * If new entry was created in the parent, it could create the 8.3 alias (the 28 * shortname of logname). So, the parent may have the negative-dentry which 29 * matches the created 8.3 alias. 30 * 31 * If it happened, the negative dentry isn't actually negative anymore. So, 32 * drop it. 33 */ 34 static int exfat_d_revalidate(struct dentry *dentry, unsigned int flags) 35 { 36 int ret; 37 38 if (flags & LOOKUP_RCU) 39 return -ECHILD; 40 41 /* 42 * This is not negative dentry. Always valid. 43 * 44 * Note, rename() to existing directory entry will have ->d_inode, and 45 * will use existing name which isn't specified name by user. 46 * 47 * We may be able to drop this positive dentry here. But dropping 48 * positive dentry isn't good idea. So it's unsupported like 49 * rename("filename", "FILENAME") for now. 50 */ 51 if (d_really_is_positive(dentry)) 52 return 1; 53 54 /* 55 * Drop the negative dentry, in order to make sure to use the case 56 * sensitive name which is specified by user if this is for creation. 57 */ 58 if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) 59 return 0; 60 61 spin_lock(&dentry->d_lock); 62 ret = inode_eq_iversion(d_inode(dentry->d_parent), 63 exfat_d_version(dentry)); 64 spin_unlock(&dentry->d_lock); 65 return ret; 66 } 67 68 /* returns the length of a struct qstr, ignoring trailing dots if necessary */ 69 static unsigned int exfat_striptail_len(unsigned int len, const char *name, 70 bool keep_last_dots) 71 { 72 if (!keep_last_dots) { 73 while (len && name[len - 1] == '.') 74 len--; 75 } 76 return len; 77 } 78 79 /* 80 * Compute the hash for the exfat name corresponding to the dentry. If the name 81 * is invalid, we leave the hash code unchanged so that the existing dentry can 82 * be used. The exfat fs routines will return ENOENT or EINVAL as appropriate. 83 */ 84 static int exfat_d_hash(const struct dentry *dentry, struct qstr *qstr) 85 { 86 struct super_block *sb = dentry->d_sb; 87 struct nls_table *t = EXFAT_SB(sb)->nls_io; 88 const unsigned char *name = qstr->name; 89 unsigned int len = exfat_striptail_len(qstr->len, qstr->name, 90 EXFAT_SB(sb)->options.keep_last_dots); 91 unsigned long hash = init_name_hash(dentry); 92 int i, charlen; 93 wchar_t c; 94 95 for (i = 0; i < len; i += charlen) { 96 charlen = t->char2uni(&name[i], len - i, &c); 97 if (charlen < 0) 98 return charlen; 99 hash = partial_name_hash(exfat_toupper(sb, c), hash); 100 } 101 102 qstr->hash = end_name_hash(hash); 103 return 0; 104 } 105 106 static int exfat_d_cmp(const struct dentry *dentry, unsigned int len, 107 const char *str, const struct qstr *name) 108 { 109 struct super_block *sb = dentry->d_sb; 110 struct nls_table *t = EXFAT_SB(sb)->nls_io; 111 unsigned int alen = exfat_striptail_len(name->len, name->name, 112 EXFAT_SB(sb)->options.keep_last_dots); 113 unsigned int blen = exfat_striptail_len(len, str, 114 EXFAT_SB(sb)->options.keep_last_dots); 115 wchar_t c1, c2; 116 int charlen, i; 117 118 if (alen != blen) 119 return 1; 120 121 for (i = 0; i < len; i += charlen) { 122 charlen = t->char2uni(&name->name[i], alen - i, &c1); 123 if (charlen < 0) 124 return 1; 125 if (charlen != t->char2uni(&str[i], blen - i, &c2)) 126 return 1; 127 128 if (exfat_toupper(sb, c1) != exfat_toupper(sb, c2)) 129 return 1; 130 } 131 132 return 0; 133 } 134 135 const struct dentry_operations exfat_dentry_ops = { 136 .d_revalidate = exfat_d_revalidate, 137 .d_hash = exfat_d_hash, 138 .d_compare = exfat_d_cmp, 139 }; 140 141 static int exfat_utf8_d_hash(const struct dentry *dentry, struct qstr *qstr) 142 { 143 struct super_block *sb = dentry->d_sb; 144 const unsigned char *name = qstr->name; 145 unsigned int len = exfat_striptail_len(qstr->len, qstr->name, 146 EXFAT_SB(sb)->options.keep_last_dots); 147 unsigned long hash = init_name_hash(dentry); 148 int i, charlen; 149 unicode_t u; 150 151 for (i = 0; i < len; i += charlen) { 152 charlen = utf8_to_utf32(&name[i], len - i, &u); 153 if (charlen < 0) 154 return charlen; 155 156 /* 157 * exfat_toupper() works only for code points up to the U+FFFF. 158 */ 159 hash = partial_name_hash(u <= 0xFFFF ? exfat_toupper(sb, u) : u, 160 hash); 161 } 162 163 qstr->hash = end_name_hash(hash); 164 return 0; 165 } 166 167 static int exfat_utf8_d_cmp(const struct dentry *dentry, unsigned int len, 168 const char *str, const struct qstr *name) 169 { 170 struct super_block *sb = dentry->d_sb; 171 unsigned int alen = exfat_striptail_len(name->len, name->name, 172 EXFAT_SB(sb)->options.keep_last_dots); 173 unsigned int blen = exfat_striptail_len(len, str, 174 EXFAT_SB(sb)->options.keep_last_dots); 175 176 unicode_t u_a, u_b; 177 int charlen, i; 178 179 if (alen != blen) 180 return 1; 181 182 for (i = 0; i < alen; i += charlen) { 183 charlen = utf8_to_utf32(&name->name[i], alen - i, &u_a); 184 if (charlen < 0) 185 return 1; 186 if (charlen != utf8_to_utf32(&str[i], blen - i, &u_b)) 187 return 1; 188 189 if (u_a <= 0xFFFF && u_b <= 0xFFFF) { 190 if (exfat_toupper(sb, u_a) != exfat_toupper(sb, u_b)) 191 return 1; 192 } else { 193 if (u_a != u_b) 194 return 1; 195 } 196 } 197 198 return 0; 199 } 200 201 const struct dentry_operations exfat_utf8_dentry_ops = { 202 .d_revalidate = exfat_d_revalidate, 203 .d_hash = exfat_utf8_d_hash, 204 .d_compare = exfat_utf8_d_cmp, 205 }; 206 207 /* search EMPTY CONTINUOUS "num_entries" entries */ 208 static int exfat_search_empty_slot(struct super_block *sb, 209 struct exfat_hint_femp *hint_femp, struct exfat_chain *p_dir, 210 int num_entries, struct exfat_entry_set_cache *es) 211 { 212 int i, dentry, ret; 213 int dentries_per_clu; 214 struct exfat_chain clu; 215 struct exfat_sb_info *sbi = EXFAT_SB(sb); 216 int total_entries = EXFAT_CLU_TO_DEN(p_dir->size, sbi); 217 218 dentries_per_clu = sbi->dentries_per_clu; 219 220 if (hint_femp->eidx != EXFAT_HINT_NONE) { 221 dentry = hint_femp->eidx; 222 223 /* 224 * If hint_femp->count is enough, it is needed to check if 225 * there are actual empty entries. 226 * Otherwise, and if "dentry + hint_famp->count" is also equal 227 * to "p_dir->size * dentries_per_clu", it means ENOSPC. 228 */ 229 if (dentry + hint_femp->count == total_entries && 230 num_entries > hint_femp->count) 231 return -ENOSPC; 232 233 hint_femp->eidx = EXFAT_HINT_NONE; 234 exfat_chain_dup(&clu, &hint_femp->cur); 235 } else { 236 exfat_chain_dup(&clu, p_dir); 237 dentry = 0; 238 } 239 240 while (dentry + num_entries < total_entries && 241 clu.dir != EXFAT_EOF_CLUSTER) { 242 i = dentry & (dentries_per_clu - 1); 243 244 ret = exfat_get_empty_dentry_set(es, sb, &clu, i, num_entries); 245 if (ret < 0) 246 return ret; 247 else if (ret == 0) 248 return dentry; 249 250 dentry += ret; 251 i += ret; 252 253 while (i >= dentries_per_clu) { 254 if (clu.flags == ALLOC_NO_FAT_CHAIN) { 255 if (--clu.size > 0) 256 clu.dir++; 257 else 258 clu.dir = EXFAT_EOF_CLUSTER; 259 } else { 260 if (exfat_get_next_cluster(sb, &clu.dir)) 261 return -EIO; 262 } 263 264 i -= dentries_per_clu; 265 } 266 } 267 268 hint_femp->eidx = dentry; 269 hint_femp->count = 0; 270 if (dentry == total_entries || clu.dir == EXFAT_EOF_CLUSTER) 271 exfat_chain_set(&hint_femp->cur, EXFAT_EOF_CLUSTER, 0, 272 clu.flags); 273 else 274 hint_femp->cur = clu; 275 276 return -ENOSPC; 277 } 278 279 static int exfat_check_max_dentries(struct inode *inode) 280 { 281 if (EXFAT_B_TO_DEN(i_size_read(inode)) >= MAX_EXFAT_DENTRIES) { 282 /* 283 * exFAT spec allows a dir to grow up to 8388608(256MB) 284 * dentries 285 */ 286 return -ENOSPC; 287 } 288 return 0; 289 } 290 291 /* find empty directory entry. 292 * if there isn't any empty slot, expand cluster chain. 293 */ 294 static int exfat_find_empty_entry(struct inode *inode, 295 struct exfat_chain *p_dir, int num_entries, 296 struct exfat_entry_set_cache *es) 297 { 298 int dentry; 299 unsigned int ret, last_clu; 300 loff_t size = 0; 301 struct exfat_chain clu; 302 struct super_block *sb = inode->i_sb; 303 struct exfat_sb_info *sbi = EXFAT_SB(sb); 304 struct exfat_inode_info *ei = EXFAT_I(inode); 305 struct exfat_hint_femp hint_femp; 306 307 hint_femp.eidx = EXFAT_HINT_NONE; 308 309 if (ei->hint_femp.eidx != EXFAT_HINT_NONE) { 310 hint_femp = ei->hint_femp; 311 ei->hint_femp.eidx = EXFAT_HINT_NONE; 312 } 313 314 while ((dentry = exfat_search_empty_slot(sb, &hint_femp, p_dir, 315 num_entries, es)) < 0) { 316 if (dentry == -EIO) 317 break; 318 319 if (exfat_check_max_dentries(inode)) 320 return -ENOSPC; 321 322 /* 323 * Allocate new cluster to this directory 324 */ 325 if (ei->start_clu != EXFAT_EOF_CLUSTER) { 326 /* we trust p_dir->size regardless of FAT type */ 327 if (exfat_find_last_cluster(sb, p_dir, &last_clu)) 328 return -EIO; 329 330 exfat_chain_set(&clu, last_clu + 1, 0, p_dir->flags); 331 } else { 332 /* This directory is empty */ 333 exfat_chain_set(&clu, EXFAT_EOF_CLUSTER, 0, 334 ALLOC_NO_FAT_CHAIN); 335 } 336 337 /* allocate a cluster */ 338 ret = exfat_alloc_cluster(inode, 1, &clu, IS_DIRSYNC(inode)); 339 if (ret) 340 return ret; 341 342 if (exfat_zeroed_cluster(inode, clu.dir)) 343 return -EIO; 344 345 if (ei->start_clu == EXFAT_EOF_CLUSTER) { 346 ei->start_clu = clu.dir; 347 p_dir->dir = clu.dir; 348 } 349 350 /* append to the FAT chain */ 351 if (clu.flags != p_dir->flags) { 352 /* no-fat-chain bit is disabled, 353 * so fat-chain should be synced with alloc-bitmap 354 */ 355 exfat_chain_cont_cluster(sb, p_dir->dir, p_dir->size); 356 p_dir->flags = ALLOC_FAT_CHAIN; 357 hint_femp.cur.flags = ALLOC_FAT_CHAIN; 358 } 359 360 if (clu.flags == ALLOC_FAT_CHAIN) 361 if (exfat_ent_set(sb, last_clu, clu.dir)) 362 return -EIO; 363 364 if (hint_femp.cur.dir == EXFAT_EOF_CLUSTER) 365 exfat_chain_set(&hint_femp.cur, clu.dir, 0, clu.flags); 366 367 hint_femp.count += sbi->dentries_per_clu; 368 369 hint_femp.cur.size++; 370 p_dir->size++; 371 size = EXFAT_CLU_TO_B(p_dir->size, sbi); 372 373 /* directory inode should be updated in here */ 374 i_size_write(inode, size); 375 ei->valid_size += sbi->cluster_size; 376 ei->flags = p_dir->flags; 377 inode->i_blocks += sbi->cluster_size >> 9; 378 } 379 380 return dentry; 381 } 382 383 /* 384 * Name Resolution Functions : 385 * Zero if it was successful; otherwise nonzero. 386 */ 387 static int __exfat_resolve_path(struct inode *inode, const unsigned char *path, 388 struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, 389 int lookup) 390 { 391 int namelen; 392 int lossy = NLS_NAME_NO_LOSSY; 393 struct super_block *sb = inode->i_sb; 394 struct exfat_sb_info *sbi = EXFAT_SB(sb); 395 struct exfat_inode_info *ei = EXFAT_I(inode); 396 int pathlen = strlen(path); 397 398 /* 399 * get the length of the pathname excluding 400 * trailing periods, if any. 401 */ 402 namelen = exfat_striptail_len(pathlen, path, false); 403 if (EXFAT_SB(sb)->options.keep_last_dots) { 404 /* 405 * Do not allow the creation of files with names 406 * ending with period(s). 407 */ 408 if (!lookup && (namelen < pathlen)) 409 return -EINVAL; 410 namelen = pathlen; 411 } 412 if (!namelen) 413 return -ENOENT; 414 if (pathlen > (MAX_NAME_LENGTH * MAX_CHARSET_SIZE)) 415 return -ENAMETOOLONG; 416 417 /* 418 * strip all leading spaces : 419 * "MS windows 7" supports leading spaces. 420 * So we should skip this preprocessing for compatibility. 421 */ 422 423 /* file name conversion : 424 * If lookup case, we allow bad-name for compatibility. 425 */ 426 namelen = exfat_nls_to_utf16(sb, path, namelen, p_uniname, 427 &lossy); 428 if (namelen < 0) 429 return namelen; /* return error value */ 430 431 if ((lossy && !lookup) || !namelen) 432 return (lossy & NLS_NAME_OVERLEN) ? -ENAMETOOLONG : -EINVAL; 433 434 exfat_chain_set(p_dir, ei->start_clu, 435 EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags); 436 437 return 0; 438 } 439 440 static inline int exfat_resolve_path(struct inode *inode, 441 const unsigned char *path, struct exfat_chain *dir, 442 struct exfat_uni_name *uni) 443 { 444 return __exfat_resolve_path(inode, path, dir, uni, 0); 445 } 446 447 static inline int exfat_resolve_path_for_lookup(struct inode *inode, 448 const unsigned char *path, struct exfat_chain *dir, 449 struct exfat_uni_name *uni) 450 { 451 return __exfat_resolve_path(inode, path, dir, uni, 1); 452 } 453 454 static inline loff_t exfat_make_i_pos(struct exfat_dir_entry *info) 455 { 456 return ((loff_t) info->dir.dir << 32) | (info->entry & 0xffffffff); 457 } 458 459 static int exfat_add_entry(struct inode *inode, const char *path, 460 struct exfat_chain *p_dir, unsigned int type, 461 struct exfat_dir_entry *info) 462 { 463 int ret, dentry, num_entries; 464 struct super_block *sb = inode->i_sb; 465 struct exfat_sb_info *sbi = EXFAT_SB(sb); 466 struct exfat_uni_name uniname; 467 struct exfat_chain clu; 468 struct timespec64 ts = current_time(inode); 469 struct exfat_entry_set_cache es; 470 int clu_size = 0; 471 unsigned int start_clu = EXFAT_FREE_CLUSTER; 472 473 ret = exfat_resolve_path(inode, path, p_dir, &uniname); 474 if (ret) 475 goto out; 476 477 num_entries = exfat_calc_num_entries(&uniname); 478 if (num_entries < 0) { 479 ret = num_entries; 480 goto out; 481 } 482 483 /* exfat_find_empty_entry must be called before alloc_cluster() */ 484 dentry = exfat_find_empty_entry(inode, p_dir, num_entries, &es); 485 if (dentry < 0) { 486 ret = dentry; /* -EIO or -ENOSPC */ 487 goto out; 488 } 489 490 if (type == TYPE_DIR && !sbi->options.zero_size_dir) { 491 ret = exfat_alloc_new_dir(inode, &clu); 492 if (ret) { 493 exfat_put_dentry_set(&es, false); 494 goto out; 495 } 496 start_clu = clu.dir; 497 clu_size = sbi->cluster_size; 498 } 499 500 /* update the directory entry */ 501 /* fill the dos name directory entry information of the created file. 502 * the first cluster is not determined yet. (0) 503 */ 504 exfat_init_dir_entry(&es, type, start_clu, clu_size, &ts); 505 exfat_init_ext_entry(&es, num_entries, &uniname); 506 507 ret = exfat_put_dentry_set(&es, IS_DIRSYNC(inode)); 508 if (ret) 509 goto out; 510 511 info->dir = *p_dir; 512 info->entry = dentry; 513 info->flags = ALLOC_NO_FAT_CHAIN; 514 info->type = type; 515 516 if (type == TYPE_FILE) { 517 info->attr = EXFAT_ATTR_ARCHIVE; 518 info->start_clu = EXFAT_EOF_CLUSTER; 519 info->size = 0; 520 info->num_subdirs = 0; 521 } else { 522 info->attr = EXFAT_ATTR_SUBDIR; 523 if (sbi->options.zero_size_dir) 524 info->start_clu = EXFAT_EOF_CLUSTER; 525 else 526 info->start_clu = start_clu; 527 info->size = clu_size; 528 info->num_subdirs = EXFAT_MIN_SUBDIR; 529 } 530 info->valid_size = info->size; 531 532 memset(&info->crtime, 0, sizeof(info->crtime)); 533 memset(&info->mtime, 0, sizeof(info->mtime)); 534 memset(&info->atime, 0, sizeof(info->atime)); 535 out: 536 return ret; 537 } 538 539 static int exfat_create(struct mnt_idmap *idmap, struct inode *dir, 540 struct dentry *dentry, umode_t mode, bool excl) 541 { 542 struct super_block *sb = dir->i_sb; 543 struct inode *inode; 544 struct exfat_chain cdir; 545 struct exfat_dir_entry info; 546 loff_t i_pos; 547 int err; 548 loff_t size = i_size_read(dir); 549 550 if (unlikely(exfat_forced_shutdown(sb))) 551 return -EIO; 552 553 mutex_lock(&EXFAT_SB(sb)->s_lock); 554 exfat_set_volume_dirty(sb); 555 err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_FILE, 556 &info); 557 if (err) 558 goto unlock; 559 560 inode_inc_iversion(dir); 561 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); 562 if (IS_DIRSYNC(dir) && size != i_size_read(dir)) 563 exfat_sync_inode(dir); 564 else 565 mark_inode_dirty(dir); 566 567 i_pos = exfat_make_i_pos(&info); 568 inode = exfat_build_inode(sb, &info, i_pos); 569 err = PTR_ERR_OR_ZERO(inode); 570 if (err) 571 goto unlock; 572 573 inode_inc_iversion(inode); 574 EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode); 575 exfat_truncate_inode_atime(inode); 576 577 /* timestamp is already written, so mark_inode_dirty() is unneeded. */ 578 579 d_instantiate(dentry, inode); 580 unlock: 581 mutex_unlock(&EXFAT_SB(sb)->s_lock); 582 return err; 583 } 584 585 /* lookup a file */ 586 static int exfat_find(struct inode *dir, struct qstr *qname, 587 struct exfat_dir_entry *info) 588 { 589 int ret, dentry, count; 590 struct exfat_chain cdir; 591 struct exfat_uni_name uni_name; 592 struct super_block *sb = dir->i_sb; 593 struct exfat_sb_info *sbi = EXFAT_SB(sb); 594 struct exfat_inode_info *ei = EXFAT_I(dir); 595 struct exfat_dentry *ep, *ep2; 596 struct exfat_entry_set_cache es; 597 /* for optimized dir & entry to prevent long traverse of cluster chain */ 598 struct exfat_hint hint_opt; 599 600 if (qname->len == 0) 601 return -ENOENT; 602 603 /* check the validity of directory name in the given pathname */ 604 ret = exfat_resolve_path_for_lookup(dir, qname->name, &cdir, &uni_name); 605 if (ret) 606 return ret; 607 608 /* check the validation of hint_stat and initialize it if required */ 609 if (ei->version != (inode_peek_iversion_raw(dir) & 0xffffffff)) { 610 ei->hint_stat.clu = cdir.dir; 611 ei->hint_stat.eidx = 0; 612 ei->version = (inode_peek_iversion_raw(dir) & 0xffffffff); 613 ei->hint_femp.eidx = EXFAT_HINT_NONE; 614 } 615 616 /* search the file name for directories */ 617 dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name, &hint_opt); 618 if (dentry < 0) 619 return dentry; /* -error value */ 620 621 info->dir = cdir; 622 info->entry = dentry; 623 info->num_subdirs = 0; 624 625 /* adjust cdir to the optimized value */ 626 cdir.dir = hint_opt.clu; 627 if (cdir.flags & ALLOC_NO_FAT_CHAIN) 628 cdir.size -= dentry / sbi->dentries_per_clu; 629 dentry = hint_opt.eidx; 630 if (exfat_get_dentry_set(&es, sb, &cdir, dentry, ES_2_ENTRIES)) 631 return -EIO; 632 ep = exfat_get_dentry_cached(&es, ES_IDX_FILE); 633 ep2 = exfat_get_dentry_cached(&es, ES_IDX_STREAM); 634 635 info->type = exfat_get_entry_type(ep); 636 info->attr = le16_to_cpu(ep->dentry.file.attr); 637 info->size = le64_to_cpu(ep2->dentry.stream.valid_size); 638 info->valid_size = le64_to_cpu(ep2->dentry.stream.valid_size); 639 info->size = le64_to_cpu(ep2->dentry.stream.size); 640 if (info->size == 0) { 641 info->flags = ALLOC_NO_FAT_CHAIN; 642 info->start_clu = EXFAT_EOF_CLUSTER; 643 } else { 644 info->flags = ep2->dentry.stream.flags; 645 info->start_clu = 646 le32_to_cpu(ep2->dentry.stream.start_clu); 647 } 648 649 exfat_get_entry_time(sbi, &info->crtime, 650 ep->dentry.file.create_tz, 651 ep->dentry.file.create_time, 652 ep->dentry.file.create_date, 653 ep->dentry.file.create_time_cs); 654 exfat_get_entry_time(sbi, &info->mtime, 655 ep->dentry.file.modify_tz, 656 ep->dentry.file.modify_time, 657 ep->dentry.file.modify_date, 658 ep->dentry.file.modify_time_cs); 659 exfat_get_entry_time(sbi, &info->atime, 660 ep->dentry.file.access_tz, 661 ep->dentry.file.access_time, 662 ep->dentry.file.access_date, 663 0); 664 exfat_put_dentry_set(&es, false); 665 666 if (ei->start_clu == EXFAT_FREE_CLUSTER) { 667 exfat_fs_error(sb, 668 "non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)", 669 i_size_read(dir), ei->dir.dir, ei->entry); 670 return -EIO; 671 } 672 673 if (info->type == TYPE_DIR) { 674 exfat_chain_set(&cdir, info->start_clu, 675 EXFAT_B_TO_CLU(info->size, sbi), info->flags); 676 count = exfat_count_dir_entries(sb, &cdir); 677 if (count < 0) 678 return -EIO; 679 680 info->num_subdirs = count + EXFAT_MIN_SUBDIR; 681 } 682 return 0; 683 } 684 685 static int exfat_d_anon_disconn(struct dentry *dentry) 686 { 687 return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED); 688 } 689 690 static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry, 691 unsigned int flags) 692 { 693 struct super_block *sb = dir->i_sb; 694 struct inode *inode; 695 struct dentry *alias; 696 struct exfat_dir_entry info; 697 int err; 698 loff_t i_pos; 699 mode_t i_mode; 700 701 mutex_lock(&EXFAT_SB(sb)->s_lock); 702 err = exfat_find(dir, &dentry->d_name, &info); 703 if (err) { 704 if (err == -ENOENT) { 705 inode = NULL; 706 goto out; 707 } 708 goto unlock; 709 } 710 711 i_pos = exfat_make_i_pos(&info); 712 inode = exfat_build_inode(sb, &info, i_pos); 713 err = PTR_ERR_OR_ZERO(inode); 714 if (err) 715 goto unlock; 716 717 i_mode = inode->i_mode; 718 alias = d_find_alias(inode); 719 720 /* 721 * Checking "alias->d_parent == dentry->d_parent" to make sure 722 * FS is not corrupted (especially double linked dir). 723 */ 724 if (alias && alias->d_parent == dentry->d_parent && 725 !exfat_d_anon_disconn(alias)) { 726 727 /* 728 * Unhashed alias is able to exist because of revalidate() 729 * called by lookup_fast. You can easily make this status 730 * by calling create and lookup concurrently 731 * In such case, we reuse an alias instead of new dentry 732 */ 733 if (d_unhashed(alias)) { 734 WARN_ON(alias->d_name.hash_len != 735 dentry->d_name.hash_len); 736 exfat_info(sb, "rehashed a dentry(%p) in read lookup", 737 alias); 738 d_drop(dentry); 739 d_rehash(alias); 740 } else if (!S_ISDIR(i_mode)) { 741 /* 742 * This inode has non anonymous-DCACHE_DISCONNECTED 743 * dentry. This means, the user did ->lookup() by an 744 * another name (longname vs 8.3 alias of it) in past. 745 * 746 * Switch to new one for reason of locality if possible. 747 */ 748 d_move(alias, dentry); 749 } 750 iput(inode); 751 mutex_unlock(&EXFAT_SB(sb)->s_lock); 752 return alias; 753 } 754 dput(alias); 755 out: 756 mutex_unlock(&EXFAT_SB(sb)->s_lock); 757 if (!inode) 758 exfat_d_version_set(dentry, inode_query_iversion(dir)); 759 760 return d_splice_alias(inode, dentry); 761 unlock: 762 mutex_unlock(&EXFAT_SB(sb)->s_lock); 763 return ERR_PTR(err); 764 } 765 766 /* remove an entry, BUT don't truncate */ 767 static int exfat_unlink(struct inode *dir, struct dentry *dentry) 768 { 769 struct exfat_chain cdir; 770 struct super_block *sb = dir->i_sb; 771 struct inode *inode = dentry->d_inode; 772 struct exfat_inode_info *ei = EXFAT_I(inode); 773 struct exfat_entry_set_cache es; 774 int entry, err = 0; 775 776 if (unlikely(exfat_forced_shutdown(sb))) 777 return -EIO; 778 779 mutex_lock(&EXFAT_SB(sb)->s_lock); 780 exfat_chain_dup(&cdir, &ei->dir); 781 entry = ei->entry; 782 if (ei->dir.dir == DIR_DELETED) { 783 exfat_err(sb, "abnormal access to deleted dentry"); 784 err = -ENOENT; 785 goto unlock; 786 } 787 788 err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES); 789 if (err) { 790 err = -EIO; 791 goto unlock; 792 } 793 794 exfat_set_volume_dirty(sb); 795 796 /* update the directory entry */ 797 exfat_remove_entries(inode, &es, ES_IDX_FILE); 798 799 err = exfat_put_dentry_set(&es, IS_DIRSYNC(inode)); 800 if (err) 801 goto unlock; 802 803 /* This doesn't modify ei */ 804 ei->dir.dir = DIR_DELETED; 805 806 inode_inc_iversion(dir); 807 simple_inode_init_ts(dir); 808 exfat_truncate_inode_atime(dir); 809 mark_inode_dirty(dir); 810 811 clear_nlink(inode); 812 simple_inode_init_ts(inode); 813 exfat_truncate_inode_atime(inode); 814 exfat_unhash_inode(inode); 815 exfat_d_version_set(dentry, inode_query_iversion(dir)); 816 unlock: 817 mutex_unlock(&EXFAT_SB(sb)->s_lock); 818 return err; 819 } 820 821 static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir, 822 struct dentry *dentry, umode_t mode) 823 { 824 struct super_block *sb = dir->i_sb; 825 struct inode *inode; 826 struct exfat_dir_entry info; 827 struct exfat_chain cdir; 828 loff_t i_pos; 829 int err; 830 loff_t size = i_size_read(dir); 831 832 if (unlikely(exfat_forced_shutdown(sb))) 833 return -EIO; 834 835 mutex_lock(&EXFAT_SB(sb)->s_lock); 836 exfat_set_volume_dirty(sb); 837 err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_DIR, 838 &info); 839 if (err) 840 goto unlock; 841 842 inode_inc_iversion(dir); 843 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); 844 if (IS_DIRSYNC(dir) && size != i_size_read(dir)) 845 exfat_sync_inode(dir); 846 else 847 mark_inode_dirty(dir); 848 inc_nlink(dir); 849 850 i_pos = exfat_make_i_pos(&info); 851 inode = exfat_build_inode(sb, &info, i_pos); 852 err = PTR_ERR_OR_ZERO(inode); 853 if (err) 854 goto unlock; 855 856 inode_inc_iversion(inode); 857 EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode); 858 exfat_truncate_inode_atime(inode); 859 /* timestamp is already written, so mark_inode_dirty() is unneeded. */ 860 861 d_instantiate(dentry, inode); 862 863 unlock: 864 mutex_unlock(&EXFAT_SB(sb)->s_lock); 865 return err; 866 } 867 868 static int exfat_check_dir_empty(struct super_block *sb, 869 struct exfat_chain *p_dir) 870 { 871 int i, dentries_per_clu; 872 unsigned int type; 873 struct exfat_chain clu; 874 struct exfat_dentry *ep; 875 struct exfat_sb_info *sbi = EXFAT_SB(sb); 876 struct buffer_head *bh; 877 878 dentries_per_clu = sbi->dentries_per_clu; 879 880 if (p_dir->dir == EXFAT_EOF_CLUSTER) 881 return 0; 882 883 exfat_chain_dup(&clu, p_dir); 884 885 while (clu.dir != EXFAT_EOF_CLUSTER) { 886 for (i = 0; i < dentries_per_clu; i++) { 887 ep = exfat_get_dentry(sb, &clu, i, &bh); 888 if (!ep) 889 return -EIO; 890 type = exfat_get_entry_type(ep); 891 brelse(bh); 892 if (type == TYPE_UNUSED) 893 return 0; 894 895 if (type != TYPE_FILE && type != TYPE_DIR) 896 continue; 897 898 return -ENOTEMPTY; 899 } 900 901 if (clu.flags == ALLOC_NO_FAT_CHAIN) { 902 if (--clu.size > 0) 903 clu.dir++; 904 else 905 clu.dir = EXFAT_EOF_CLUSTER; 906 } else { 907 if (exfat_get_next_cluster(sb, &(clu.dir))) 908 return -EIO; 909 } 910 } 911 912 return 0; 913 } 914 915 static int exfat_rmdir(struct inode *dir, struct dentry *dentry) 916 { 917 struct inode *inode = dentry->d_inode; 918 struct exfat_chain cdir, clu_to_free; 919 struct super_block *sb = inode->i_sb; 920 struct exfat_sb_info *sbi = EXFAT_SB(sb); 921 struct exfat_inode_info *ei = EXFAT_I(inode); 922 struct exfat_entry_set_cache es; 923 int entry, err; 924 925 if (unlikely(exfat_forced_shutdown(sb))) 926 return -EIO; 927 928 mutex_lock(&EXFAT_SB(inode->i_sb)->s_lock); 929 930 exfat_chain_dup(&cdir, &ei->dir); 931 entry = ei->entry; 932 933 if (ei->dir.dir == DIR_DELETED) { 934 exfat_err(sb, "abnormal access to deleted dentry"); 935 err = -ENOENT; 936 goto unlock; 937 } 938 939 exfat_chain_set(&clu_to_free, ei->start_clu, 940 EXFAT_B_TO_CLU_ROUND_UP(i_size_read(inode), sbi), ei->flags); 941 942 err = exfat_check_dir_empty(sb, &clu_to_free); 943 if (err) { 944 if (err == -EIO) 945 exfat_err(sb, "failed to exfat_check_dir_empty : err(%d)", 946 err); 947 goto unlock; 948 } 949 950 err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES); 951 if (err) { 952 err = -EIO; 953 goto unlock; 954 } 955 956 exfat_set_volume_dirty(sb); 957 958 exfat_remove_entries(inode, &es, ES_IDX_FILE); 959 960 err = exfat_put_dentry_set(&es, IS_DIRSYNC(dir)); 961 if (err) 962 goto unlock; 963 964 ei->dir.dir = DIR_DELETED; 965 966 inode_inc_iversion(dir); 967 simple_inode_init_ts(dir); 968 exfat_truncate_inode_atime(dir); 969 if (IS_DIRSYNC(dir)) 970 exfat_sync_inode(dir); 971 else 972 mark_inode_dirty(dir); 973 drop_nlink(dir); 974 975 clear_nlink(inode); 976 simple_inode_init_ts(inode); 977 exfat_truncate_inode_atime(inode); 978 exfat_unhash_inode(inode); 979 exfat_d_version_set(dentry, inode_query_iversion(dir)); 980 unlock: 981 mutex_unlock(&EXFAT_SB(inode->i_sb)->s_lock); 982 return err; 983 } 984 985 static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir, 986 int oldentry, struct exfat_uni_name *p_uniname, 987 struct exfat_inode_info *ei) 988 { 989 int ret, num_new_entries; 990 struct exfat_dentry *epold, *epnew; 991 struct super_block *sb = inode->i_sb; 992 struct exfat_entry_set_cache old_es, new_es; 993 int sync = IS_DIRSYNC(inode); 994 995 if (unlikely(exfat_forced_shutdown(sb))) 996 return -EIO; 997 998 num_new_entries = exfat_calc_num_entries(p_uniname); 999 if (num_new_entries < 0) 1000 return num_new_entries; 1001 1002 ret = exfat_get_dentry_set(&old_es, sb, p_dir, oldentry, ES_ALL_ENTRIES); 1003 if (ret) { 1004 ret = -EIO; 1005 return ret; 1006 } 1007 1008 epold = exfat_get_dentry_cached(&old_es, ES_IDX_FILE); 1009 1010 if (old_es.num_entries < num_new_entries) { 1011 int newentry; 1012 1013 newentry = exfat_find_empty_entry(inode, p_dir, num_new_entries, 1014 &new_es); 1015 if (newentry < 0) { 1016 ret = newentry; /* -EIO or -ENOSPC */ 1017 goto put_old_es; 1018 } 1019 1020 epnew = exfat_get_dentry_cached(&new_es, ES_IDX_FILE); 1021 *epnew = *epold; 1022 if (exfat_get_entry_type(epnew) == TYPE_FILE) { 1023 epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); 1024 ei->attr |= EXFAT_ATTR_ARCHIVE; 1025 } 1026 1027 epold = exfat_get_dentry_cached(&old_es, ES_IDX_STREAM); 1028 epnew = exfat_get_dentry_cached(&new_es, ES_IDX_STREAM); 1029 *epnew = *epold; 1030 1031 exfat_init_ext_entry(&new_es, num_new_entries, p_uniname); 1032 1033 ret = exfat_put_dentry_set(&new_es, sync); 1034 if (ret) 1035 goto put_old_es; 1036 1037 exfat_remove_entries(inode, &old_es, ES_IDX_FILE); 1038 ei->dir = *p_dir; 1039 ei->entry = newentry; 1040 } else { 1041 if (exfat_get_entry_type(epold) == TYPE_FILE) { 1042 epold->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); 1043 ei->attr |= EXFAT_ATTR_ARCHIVE; 1044 } 1045 1046 exfat_remove_entries(inode, &old_es, ES_IDX_FIRST_FILENAME + 1); 1047 exfat_init_ext_entry(&old_es, num_new_entries, p_uniname); 1048 } 1049 return exfat_put_dentry_set(&old_es, sync); 1050 1051 put_old_es: 1052 exfat_put_dentry_set(&old_es, false); 1053 return ret; 1054 } 1055 1056 static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir, 1057 int oldentry, struct exfat_chain *p_newdir, 1058 struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei) 1059 { 1060 int ret, newentry, num_new_entries; 1061 struct exfat_dentry *epmov, *epnew; 1062 struct super_block *sb = inode->i_sb; 1063 struct exfat_entry_set_cache mov_es, new_es; 1064 1065 num_new_entries = exfat_calc_num_entries(p_uniname); 1066 if (num_new_entries < 0) 1067 return num_new_entries; 1068 1069 ret = exfat_get_dentry_set(&mov_es, sb, p_olddir, oldentry, 1070 ES_ALL_ENTRIES); 1071 if (ret) 1072 return -EIO; 1073 1074 newentry = exfat_find_empty_entry(inode, p_newdir, num_new_entries, 1075 &new_es); 1076 if (newentry < 0) { 1077 ret = newentry; /* -EIO or -ENOSPC */ 1078 goto put_mov_es; 1079 } 1080 1081 epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_FILE); 1082 epnew = exfat_get_dentry_cached(&new_es, ES_IDX_FILE); 1083 *epnew = *epmov; 1084 if (exfat_get_entry_type(epnew) == TYPE_FILE) { 1085 epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); 1086 ei->attr |= EXFAT_ATTR_ARCHIVE; 1087 } 1088 1089 epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_STREAM); 1090 epnew = exfat_get_dentry_cached(&new_es, ES_IDX_STREAM); 1091 *epnew = *epmov; 1092 1093 exfat_init_ext_entry(&new_es, num_new_entries, p_uniname); 1094 exfat_remove_entries(inode, &mov_es, ES_IDX_FILE); 1095 1096 exfat_chain_set(&ei->dir, p_newdir->dir, p_newdir->size, 1097 p_newdir->flags); 1098 1099 ei->entry = newentry; 1100 1101 ret = exfat_put_dentry_set(&new_es, IS_DIRSYNC(inode)); 1102 if (ret) 1103 goto put_mov_es; 1104 1105 return exfat_put_dentry_set(&mov_es, IS_DIRSYNC(inode)); 1106 1107 put_mov_es: 1108 exfat_put_dentry_set(&mov_es, false); 1109 1110 return ret; 1111 } 1112 1113 /* rename or move a old file into a new file */ 1114 static int __exfat_rename(struct inode *old_parent_inode, 1115 struct exfat_inode_info *ei, struct inode *new_parent_inode, 1116 struct dentry *new_dentry) 1117 { 1118 int ret; 1119 int dentry; 1120 struct exfat_chain olddir, newdir; 1121 struct exfat_chain *p_dir = NULL; 1122 struct exfat_uni_name uni_name; 1123 struct exfat_dentry *ep; 1124 struct super_block *sb = old_parent_inode->i_sb; 1125 struct exfat_sb_info *sbi = EXFAT_SB(sb); 1126 const unsigned char *new_path = new_dentry->d_name.name; 1127 struct inode *new_inode = new_dentry->d_inode; 1128 struct exfat_inode_info *new_ei = NULL; 1129 unsigned int new_entry_type = TYPE_UNUSED; 1130 int new_entry = 0; 1131 struct buffer_head *new_bh = NULL; 1132 1133 /* check the validity of pointer parameters */ 1134 if (new_path == NULL || strlen(new_path) == 0) 1135 return -EINVAL; 1136 1137 if (ei->dir.dir == DIR_DELETED) { 1138 exfat_err(sb, "abnormal access to deleted source dentry"); 1139 return -ENOENT; 1140 } 1141 1142 exfat_chain_set(&olddir, EXFAT_I(old_parent_inode)->start_clu, 1143 EXFAT_B_TO_CLU_ROUND_UP(i_size_read(old_parent_inode), sbi), 1144 EXFAT_I(old_parent_inode)->flags); 1145 dentry = ei->entry; 1146 1147 /* check whether new dir is existing directory and empty */ 1148 if (new_inode) { 1149 ret = -EIO; 1150 new_ei = EXFAT_I(new_inode); 1151 1152 if (new_ei->dir.dir == DIR_DELETED) { 1153 exfat_err(sb, "abnormal access to deleted target dentry"); 1154 goto out; 1155 } 1156 1157 p_dir = &(new_ei->dir); 1158 new_entry = new_ei->entry; 1159 ep = exfat_get_dentry(sb, p_dir, new_entry, &new_bh); 1160 if (!ep) 1161 goto out; 1162 1163 new_entry_type = exfat_get_entry_type(ep); 1164 brelse(new_bh); 1165 1166 /* if new_inode exists, update ei */ 1167 if (new_entry_type == TYPE_DIR) { 1168 struct exfat_chain new_clu; 1169 1170 new_clu.dir = new_ei->start_clu; 1171 new_clu.size = 1172 EXFAT_B_TO_CLU_ROUND_UP(i_size_read(new_inode), 1173 sbi); 1174 new_clu.flags = new_ei->flags; 1175 1176 ret = exfat_check_dir_empty(sb, &new_clu); 1177 if (ret) 1178 goto out; 1179 } 1180 } 1181 1182 /* check the validity of directory name in the given new pathname */ 1183 ret = exfat_resolve_path(new_parent_inode, new_path, &newdir, 1184 &uni_name); 1185 if (ret) 1186 goto out; 1187 1188 exfat_set_volume_dirty(sb); 1189 1190 if (olddir.dir == newdir.dir) 1191 ret = exfat_rename_file(new_parent_inode, &olddir, dentry, 1192 &uni_name, ei); 1193 else 1194 ret = exfat_move_file(new_parent_inode, &olddir, dentry, 1195 &newdir, &uni_name, ei); 1196 1197 if (!ret && new_inode) { 1198 struct exfat_entry_set_cache es; 1199 1200 /* delete entries of new_dir */ 1201 ret = exfat_get_dentry_set(&es, sb, p_dir, new_entry, 1202 ES_ALL_ENTRIES); 1203 if (ret) { 1204 ret = -EIO; 1205 goto del_out; 1206 } 1207 1208 exfat_remove_entries(new_inode, &es, ES_IDX_FILE); 1209 1210 ret = exfat_put_dentry_set(&es, IS_DIRSYNC(new_inode)); 1211 if (ret) 1212 goto del_out; 1213 1214 /* Free the clusters if new_inode is a dir(as if exfat_rmdir) */ 1215 if (new_entry_type == TYPE_DIR && 1216 new_ei->start_clu != EXFAT_EOF_CLUSTER) { 1217 /* new_ei, new_clu_to_free */ 1218 struct exfat_chain new_clu_to_free; 1219 1220 exfat_chain_set(&new_clu_to_free, new_ei->start_clu, 1221 EXFAT_B_TO_CLU_ROUND_UP(i_size_read(new_inode), 1222 sbi), new_ei->flags); 1223 1224 if (exfat_free_cluster(new_inode, &new_clu_to_free)) { 1225 /* just set I/O error only */ 1226 ret = -EIO; 1227 } 1228 1229 i_size_write(new_inode, 0); 1230 new_ei->valid_size = 0; 1231 new_ei->start_clu = EXFAT_EOF_CLUSTER; 1232 new_ei->flags = ALLOC_NO_FAT_CHAIN; 1233 } 1234 del_out: 1235 /* Update new_inode ei 1236 * Prevent syncing removed new_inode 1237 * (new_ei is already initialized above code ("if (new_inode)") 1238 */ 1239 new_ei->dir.dir = DIR_DELETED; 1240 } 1241 out: 1242 return ret; 1243 } 1244 1245 static int exfat_rename(struct mnt_idmap *idmap, 1246 struct inode *old_dir, struct dentry *old_dentry, 1247 struct inode *new_dir, struct dentry *new_dentry, 1248 unsigned int flags) 1249 { 1250 struct inode *old_inode, *new_inode; 1251 struct super_block *sb = old_dir->i_sb; 1252 loff_t i_pos; 1253 int err; 1254 loff_t size = i_size_read(new_dir); 1255 1256 /* 1257 * The VFS already checks for existence, so for local filesystems 1258 * the RENAME_NOREPLACE implementation is equivalent to plain rename. 1259 * Don't support any other flags 1260 */ 1261 if (flags & ~RENAME_NOREPLACE) 1262 return -EINVAL; 1263 1264 mutex_lock(&EXFAT_SB(sb)->s_lock); 1265 old_inode = old_dentry->d_inode; 1266 new_inode = new_dentry->d_inode; 1267 1268 err = __exfat_rename(old_dir, EXFAT_I(old_inode), new_dir, new_dentry); 1269 if (err) 1270 goto unlock; 1271 1272 inode_inc_iversion(new_dir); 1273 simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry); 1274 EXFAT_I(new_dir)->i_crtime = current_time(new_dir); 1275 exfat_truncate_inode_atime(new_dir); 1276 if (IS_DIRSYNC(new_dir) && size != i_size_read(new_dir)) 1277 exfat_sync_inode(new_dir); 1278 else 1279 mark_inode_dirty(new_dir); 1280 1281 i_pos = ((loff_t)EXFAT_I(old_inode)->dir.dir << 32) | 1282 (EXFAT_I(old_inode)->entry & 0xffffffff); 1283 exfat_unhash_inode(old_inode); 1284 exfat_hash_inode(old_inode, i_pos); 1285 if (IS_DIRSYNC(new_dir)) 1286 exfat_sync_inode(old_inode); 1287 else 1288 mark_inode_dirty(old_inode); 1289 1290 if (S_ISDIR(old_inode->i_mode) && old_dir != new_dir) { 1291 drop_nlink(old_dir); 1292 if (!new_inode) 1293 inc_nlink(new_dir); 1294 } 1295 1296 inode_inc_iversion(old_dir); 1297 if (new_dir != old_dir) 1298 mark_inode_dirty(old_dir); 1299 1300 if (new_inode) { 1301 exfat_unhash_inode(new_inode); 1302 1303 /* skip drop_nlink if new_inode already has been dropped */ 1304 if (new_inode->i_nlink) { 1305 drop_nlink(new_inode); 1306 if (S_ISDIR(new_inode->i_mode)) 1307 drop_nlink(new_inode); 1308 } else { 1309 exfat_warn(sb, "abnormal access to an inode dropped"); 1310 WARN_ON(new_inode->i_nlink == 0); 1311 } 1312 EXFAT_I(new_inode)->i_crtime = current_time(new_inode); 1313 } 1314 1315 unlock: 1316 mutex_unlock(&EXFAT_SB(sb)->s_lock); 1317 return err; 1318 } 1319 1320 const struct inode_operations exfat_dir_inode_operations = { 1321 .create = exfat_create, 1322 .lookup = exfat_lookup, 1323 .unlink = exfat_unlink, 1324 .mkdir = exfat_mkdir, 1325 .rmdir = exfat_rmdir, 1326 .rename = exfat_rename, 1327 .setattr = exfat_setattr, 1328 .getattr = exfat_getattr, 1329 }; 1330