1 /* 2 * linux/fs/ext2/dir.c 3 * 4 * Copyright (C) 1992, 1993, 1994, 1995 5 * Remy Card (card@masi.ibp.fr) 6 * Laboratoire MASI - Institut Blaise Pascal 7 * Universite Pierre et Marie Curie (Paris VI) 8 * 9 * from 10 * 11 * linux/fs/minix/dir.c 12 * 13 * Copyright (C) 1991, 1992 Linus Torvalds 14 * 15 * ext2 directory handling functions 16 * 17 * Big-endian to little-endian byte-swapping/bitmaps by 18 * David S. Miller (davem@caip.rutgers.edu), 1995 19 * 20 * All code that works with directory layout had been switched to pagecache 21 * and moved here. AV 22 */ 23 24 #include "ext2.h" 25 #include <linux/buffer_head.h> 26 #include <linux/pagemap.h> 27 #include <linux/swap.h> 28 29 typedef struct ext2_dir_entry_2 ext2_dirent; 30 31 /* 32 * ext2 uses block-sized chunks. Arguably, sector-sized ones would be 33 * more robust, but we have what we have 34 */ 35 static inline unsigned ext2_chunk_size(struct inode *inode) 36 { 37 return inode->i_sb->s_blocksize; 38 } 39 40 static inline void ext2_put_page(struct page *page) 41 { 42 kunmap(page); 43 page_cache_release(page); 44 } 45 46 static inline unsigned long dir_pages(struct inode *inode) 47 { 48 return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT; 49 } 50 51 /* 52 * Return the offset into page `page_nr' of the last valid 53 * byte in that page, plus one. 54 */ 55 static unsigned 56 ext2_last_byte(struct inode *inode, unsigned long page_nr) 57 { 58 unsigned last_byte = inode->i_size; 59 60 last_byte -= page_nr << PAGE_CACHE_SHIFT; 61 if (last_byte > PAGE_CACHE_SIZE) 62 last_byte = PAGE_CACHE_SIZE; 63 return last_byte; 64 } 65 66 static int ext2_commit_chunk(struct page *page, loff_t pos, unsigned len) 67 { 68 struct address_space *mapping = page->mapping; 69 struct inode *dir = mapping->host; 70 int err = 0; 71 72 dir->i_version++; 73 block_write_end(NULL, mapping, pos, len, len, page, NULL); 74 75 if (pos+len > dir->i_size) { 76 i_size_write(dir, pos+len); 77 mark_inode_dirty(dir); 78 } 79 80 if (IS_DIRSYNC(dir)) 81 err = write_one_page(page, 1); 82 else 83 unlock_page(page); 84 85 return err; 86 } 87 88 static void ext2_check_page(struct page *page) 89 { 90 struct inode *dir = page->mapping->host; 91 struct super_block *sb = dir->i_sb; 92 unsigned chunk_size = ext2_chunk_size(dir); 93 char *kaddr = page_address(page); 94 u32 max_inumber = le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count); 95 unsigned offs, rec_len; 96 unsigned limit = PAGE_CACHE_SIZE; 97 ext2_dirent *p; 98 char *error; 99 100 if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) { 101 limit = dir->i_size & ~PAGE_CACHE_MASK; 102 if (limit & (chunk_size - 1)) 103 goto Ebadsize; 104 if (!limit) 105 goto out; 106 } 107 for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) { 108 p = (ext2_dirent *)(kaddr + offs); 109 rec_len = le16_to_cpu(p->rec_len); 110 111 if (rec_len < EXT2_DIR_REC_LEN(1)) 112 goto Eshort; 113 if (rec_len & 3) 114 goto Ealign; 115 if (rec_len < EXT2_DIR_REC_LEN(p->name_len)) 116 goto Enamelen; 117 if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1)) 118 goto Espan; 119 if (le32_to_cpu(p->inode) > max_inumber) 120 goto Einumber; 121 } 122 if (offs != limit) 123 goto Eend; 124 out: 125 SetPageChecked(page); 126 return; 127 128 /* Too bad, we had an error */ 129 130 Ebadsize: 131 ext2_error(sb, "ext2_check_page", 132 "size of directory #%lu is not a multiple of chunk size", 133 dir->i_ino 134 ); 135 goto fail; 136 Eshort: 137 error = "rec_len is smaller than minimal"; 138 goto bad_entry; 139 Ealign: 140 error = "unaligned directory entry"; 141 goto bad_entry; 142 Enamelen: 143 error = "rec_len is too small for name_len"; 144 goto bad_entry; 145 Espan: 146 error = "directory entry across blocks"; 147 goto bad_entry; 148 Einumber: 149 error = "inode out of bounds"; 150 bad_entry: 151 ext2_error (sb, "ext2_check_page", "bad entry in directory #%lu: %s - " 152 "offset=%lu, inode=%lu, rec_len=%d, name_len=%d", 153 dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs, 154 (unsigned long) le32_to_cpu(p->inode), 155 rec_len, p->name_len); 156 goto fail; 157 Eend: 158 p = (ext2_dirent *)(kaddr + offs); 159 ext2_error (sb, "ext2_check_page", 160 "entry in directory #%lu spans the page boundary" 161 "offset=%lu, inode=%lu", 162 dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs, 163 (unsigned long) le32_to_cpu(p->inode)); 164 fail: 165 SetPageChecked(page); 166 SetPageError(page); 167 } 168 169 static struct page * ext2_get_page(struct inode *dir, unsigned long n) 170 { 171 struct address_space *mapping = dir->i_mapping; 172 struct page *page = read_mapping_page(mapping, n, NULL); 173 if (!IS_ERR(page)) { 174 kmap(page); 175 if (!PageChecked(page)) 176 ext2_check_page(page); 177 if (PageError(page)) 178 goto fail; 179 } 180 return page; 181 182 fail: 183 ext2_put_page(page); 184 return ERR_PTR(-EIO); 185 } 186 187 /* 188 * NOTE! unlike strncmp, ext2_match returns 1 for success, 0 for failure. 189 * 190 * len <= EXT2_NAME_LEN and de != NULL are guaranteed by caller. 191 */ 192 static inline int ext2_match (int len, const char * const name, 193 struct ext2_dir_entry_2 * de) 194 { 195 if (len != de->name_len) 196 return 0; 197 if (!de->inode) 198 return 0; 199 return !memcmp(name, de->name, len); 200 } 201 202 /* 203 * p is at least 6 bytes before the end of page 204 */ 205 static inline ext2_dirent *ext2_next_entry(ext2_dirent *p) 206 { 207 return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len)); 208 } 209 210 static inline unsigned 211 ext2_validate_entry(char *base, unsigned offset, unsigned mask) 212 { 213 ext2_dirent *de = (ext2_dirent*)(base + offset); 214 ext2_dirent *p = (ext2_dirent*)(base + (offset&mask)); 215 while ((char*)p < (char*)de) { 216 if (p->rec_len == 0) 217 break; 218 p = ext2_next_entry(p); 219 } 220 return (char *)p - base; 221 } 222 223 static unsigned char ext2_filetype_table[EXT2_FT_MAX] = { 224 [EXT2_FT_UNKNOWN] = DT_UNKNOWN, 225 [EXT2_FT_REG_FILE] = DT_REG, 226 [EXT2_FT_DIR] = DT_DIR, 227 [EXT2_FT_CHRDEV] = DT_CHR, 228 [EXT2_FT_BLKDEV] = DT_BLK, 229 [EXT2_FT_FIFO] = DT_FIFO, 230 [EXT2_FT_SOCK] = DT_SOCK, 231 [EXT2_FT_SYMLINK] = DT_LNK, 232 }; 233 234 #define S_SHIFT 12 235 static unsigned char ext2_type_by_mode[S_IFMT >> S_SHIFT] = { 236 [S_IFREG >> S_SHIFT] = EXT2_FT_REG_FILE, 237 [S_IFDIR >> S_SHIFT] = EXT2_FT_DIR, 238 [S_IFCHR >> S_SHIFT] = EXT2_FT_CHRDEV, 239 [S_IFBLK >> S_SHIFT] = EXT2_FT_BLKDEV, 240 [S_IFIFO >> S_SHIFT] = EXT2_FT_FIFO, 241 [S_IFSOCK >> S_SHIFT] = EXT2_FT_SOCK, 242 [S_IFLNK >> S_SHIFT] = EXT2_FT_SYMLINK, 243 }; 244 245 static inline void ext2_set_de_type(ext2_dirent *de, struct inode *inode) 246 { 247 mode_t mode = inode->i_mode; 248 if (EXT2_HAS_INCOMPAT_FEATURE(inode->i_sb, EXT2_FEATURE_INCOMPAT_FILETYPE)) 249 de->file_type = ext2_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 250 else 251 de->file_type = 0; 252 } 253 254 static int 255 ext2_readdir (struct file * filp, void * dirent, filldir_t filldir) 256 { 257 loff_t pos = filp->f_pos; 258 struct inode *inode = filp->f_path.dentry->d_inode; 259 struct super_block *sb = inode->i_sb; 260 unsigned int offset = pos & ~PAGE_CACHE_MASK; 261 unsigned long n = pos >> PAGE_CACHE_SHIFT; 262 unsigned long npages = dir_pages(inode); 263 unsigned chunk_mask = ~(ext2_chunk_size(inode)-1); 264 unsigned char *types = NULL; 265 int need_revalidate = filp->f_version != inode->i_version; 266 267 if (pos > inode->i_size - EXT2_DIR_REC_LEN(1)) 268 return 0; 269 270 if (EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_FILETYPE)) 271 types = ext2_filetype_table; 272 273 for ( ; n < npages; n++, offset = 0) { 274 char *kaddr, *limit; 275 ext2_dirent *de; 276 struct page *page = ext2_get_page(inode, n); 277 278 if (IS_ERR(page)) { 279 ext2_error(sb, __FUNCTION__, 280 "bad page in #%lu", 281 inode->i_ino); 282 filp->f_pos += PAGE_CACHE_SIZE - offset; 283 return -EIO; 284 } 285 kaddr = page_address(page); 286 if (unlikely(need_revalidate)) { 287 if (offset) { 288 offset = ext2_validate_entry(kaddr, offset, chunk_mask); 289 filp->f_pos = (n<<PAGE_CACHE_SHIFT) + offset; 290 } 291 filp->f_version = inode->i_version; 292 need_revalidate = 0; 293 } 294 de = (ext2_dirent *)(kaddr+offset); 295 limit = kaddr + ext2_last_byte(inode, n) - EXT2_DIR_REC_LEN(1); 296 for ( ;(char*)de <= limit; de = ext2_next_entry(de)) { 297 if (de->rec_len == 0) { 298 ext2_error(sb, __FUNCTION__, 299 "zero-length directory entry"); 300 ext2_put_page(page); 301 return -EIO; 302 } 303 if (de->inode) { 304 int over; 305 unsigned char d_type = DT_UNKNOWN; 306 307 if (types && de->file_type < EXT2_FT_MAX) 308 d_type = types[de->file_type]; 309 310 offset = (char *)de - kaddr; 311 over = filldir(dirent, de->name, de->name_len, 312 (n<<PAGE_CACHE_SHIFT) | offset, 313 le32_to_cpu(de->inode), d_type); 314 if (over) { 315 ext2_put_page(page); 316 return 0; 317 } 318 } 319 filp->f_pos += le16_to_cpu(de->rec_len); 320 } 321 ext2_put_page(page); 322 } 323 return 0; 324 } 325 326 /* 327 * ext2_find_entry() 328 * 329 * finds an entry in the specified directory with the wanted name. It 330 * returns the page in which the entry was found, and the entry itself 331 * (as a parameter - res_dir). Page is returned mapped and unlocked. 332 * Entry is guaranteed to be valid. 333 */ 334 struct ext2_dir_entry_2 * ext2_find_entry (struct inode * dir, 335 struct dentry *dentry, struct page ** res_page) 336 { 337 const char *name = dentry->d_name.name; 338 int namelen = dentry->d_name.len; 339 unsigned reclen = EXT2_DIR_REC_LEN(namelen); 340 unsigned long start, n; 341 unsigned long npages = dir_pages(dir); 342 struct page *page = NULL; 343 struct ext2_inode_info *ei = EXT2_I(dir); 344 ext2_dirent * de; 345 346 if (npages == 0) 347 goto out; 348 349 /* OFFSET_CACHE */ 350 *res_page = NULL; 351 352 start = ei->i_dir_start_lookup; 353 if (start >= npages) 354 start = 0; 355 n = start; 356 do { 357 char *kaddr; 358 page = ext2_get_page(dir, n); 359 if (!IS_ERR(page)) { 360 kaddr = page_address(page); 361 de = (ext2_dirent *) kaddr; 362 kaddr += ext2_last_byte(dir, n) - reclen; 363 while ((char *) de <= kaddr) { 364 if (de->rec_len == 0) { 365 ext2_error(dir->i_sb, __FUNCTION__, 366 "zero-length directory entry"); 367 ext2_put_page(page); 368 goto out; 369 } 370 if (ext2_match (namelen, name, de)) 371 goto found; 372 de = ext2_next_entry(de); 373 } 374 ext2_put_page(page); 375 } 376 if (++n >= npages) 377 n = 0; 378 /* next page is past the blocks we've got */ 379 if (unlikely(n > (dir->i_blocks >> (PAGE_CACHE_SHIFT - 9)))) { 380 ext2_error(dir->i_sb, __FUNCTION__, 381 "dir %lu size %lld exceeds block count %llu", 382 dir->i_ino, dir->i_size, 383 (unsigned long long)dir->i_blocks); 384 goto out; 385 } 386 } while (n != start); 387 out: 388 return NULL; 389 390 found: 391 *res_page = page; 392 ei->i_dir_start_lookup = n; 393 return de; 394 } 395 396 struct ext2_dir_entry_2 * ext2_dotdot (struct inode *dir, struct page **p) 397 { 398 struct page *page = ext2_get_page(dir, 0); 399 ext2_dirent *de = NULL; 400 401 if (!IS_ERR(page)) { 402 de = ext2_next_entry((ext2_dirent *) page_address(page)); 403 *p = page; 404 } 405 return de; 406 } 407 408 ino_t ext2_inode_by_name(struct inode * dir, struct dentry *dentry) 409 { 410 ino_t res = 0; 411 struct ext2_dir_entry_2 * de; 412 struct page *page; 413 414 de = ext2_find_entry (dir, dentry, &page); 415 if (de) { 416 res = le32_to_cpu(de->inode); 417 ext2_put_page(page); 418 } 419 return res; 420 } 421 422 /* Releases the page */ 423 void ext2_set_link(struct inode *dir, struct ext2_dir_entry_2 *de, 424 struct page *page, struct inode *inode) 425 { 426 loff_t pos = page_offset(page) + 427 (char *) de - (char *) page_address(page); 428 unsigned len = le16_to_cpu(de->rec_len); 429 int err; 430 431 lock_page(page); 432 err = __ext2_write_begin(NULL, page->mapping, pos, len, 433 AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); 434 BUG_ON(err); 435 de->inode = cpu_to_le32(inode->i_ino); 436 ext2_set_de_type(de, inode); 437 err = ext2_commit_chunk(page, pos, len); 438 ext2_put_page(page); 439 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 440 EXT2_I(dir)->i_flags &= ~EXT2_BTREE_FL; 441 mark_inode_dirty(dir); 442 } 443 444 /* 445 * Parent is locked. 446 */ 447 int ext2_add_link (struct dentry *dentry, struct inode *inode) 448 { 449 struct inode *dir = dentry->d_parent->d_inode; 450 const char *name = dentry->d_name.name; 451 int namelen = dentry->d_name.len; 452 unsigned chunk_size = ext2_chunk_size(dir); 453 unsigned reclen = EXT2_DIR_REC_LEN(namelen); 454 unsigned short rec_len, name_len; 455 struct page *page = NULL; 456 ext2_dirent * de; 457 unsigned long npages = dir_pages(dir); 458 unsigned long n; 459 char *kaddr; 460 loff_t pos; 461 int err; 462 463 /* 464 * We take care of directory expansion in the same loop. 465 * This code plays outside i_size, so it locks the page 466 * to protect that region. 467 */ 468 for (n = 0; n <= npages; n++) { 469 char *dir_end; 470 471 page = ext2_get_page(dir, n); 472 err = PTR_ERR(page); 473 if (IS_ERR(page)) 474 goto out; 475 lock_page(page); 476 kaddr = page_address(page); 477 dir_end = kaddr + ext2_last_byte(dir, n); 478 de = (ext2_dirent *)kaddr; 479 kaddr += PAGE_CACHE_SIZE - reclen; 480 while ((char *)de <= kaddr) { 481 if ((char *)de == dir_end) { 482 /* We hit i_size */ 483 name_len = 0; 484 rec_len = chunk_size; 485 de->rec_len = cpu_to_le16(chunk_size); 486 de->inode = 0; 487 goto got_it; 488 } 489 if (de->rec_len == 0) { 490 ext2_error(dir->i_sb, __FUNCTION__, 491 "zero-length directory entry"); 492 err = -EIO; 493 goto out_unlock; 494 } 495 err = -EEXIST; 496 if (ext2_match (namelen, name, de)) 497 goto out_unlock; 498 name_len = EXT2_DIR_REC_LEN(de->name_len); 499 rec_len = le16_to_cpu(de->rec_len); 500 if (!de->inode && rec_len >= reclen) 501 goto got_it; 502 if (rec_len >= name_len + reclen) 503 goto got_it; 504 de = (ext2_dirent *) ((char *) de + rec_len); 505 } 506 unlock_page(page); 507 ext2_put_page(page); 508 } 509 BUG(); 510 return -EINVAL; 511 512 got_it: 513 pos = page_offset(page) + 514 (char*)de - (char*)page_address(page); 515 err = __ext2_write_begin(NULL, page->mapping, pos, rec_len, 0, 516 &page, NULL); 517 if (err) 518 goto out_unlock; 519 if (de->inode) { 520 ext2_dirent *de1 = (ext2_dirent *) ((char *) de + name_len); 521 de1->rec_len = cpu_to_le16(rec_len - name_len); 522 de->rec_len = cpu_to_le16(name_len); 523 de = de1; 524 } 525 de->name_len = namelen; 526 memcpy(de->name, name, namelen); 527 de->inode = cpu_to_le32(inode->i_ino); 528 ext2_set_de_type (de, inode); 529 err = ext2_commit_chunk(page, pos, rec_len); 530 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 531 EXT2_I(dir)->i_flags &= ~EXT2_BTREE_FL; 532 mark_inode_dirty(dir); 533 /* OFFSET_CACHE */ 534 out_put: 535 ext2_put_page(page); 536 out: 537 return err; 538 out_unlock: 539 unlock_page(page); 540 goto out_put; 541 } 542 543 /* 544 * ext2_delete_entry deletes a directory entry by merging it with the 545 * previous entry. Page is up-to-date. Releases the page. 546 */ 547 int ext2_delete_entry (struct ext2_dir_entry_2 * dir, struct page * page ) 548 { 549 struct address_space *mapping = page->mapping; 550 struct inode *inode = mapping->host; 551 char *kaddr = page_address(page); 552 unsigned from = ((char*)dir - kaddr) & ~(ext2_chunk_size(inode)-1); 553 unsigned to = ((char*)dir - kaddr) + le16_to_cpu(dir->rec_len); 554 loff_t pos; 555 ext2_dirent * pde = NULL; 556 ext2_dirent * de = (ext2_dirent *) (kaddr + from); 557 int err; 558 559 while ((char*)de < (char*)dir) { 560 if (de->rec_len == 0) { 561 ext2_error(inode->i_sb, __FUNCTION__, 562 "zero-length directory entry"); 563 err = -EIO; 564 goto out; 565 } 566 pde = de; 567 de = ext2_next_entry(de); 568 } 569 if (pde) 570 from = (char*)pde - (char*)page_address(page); 571 pos = page_offset(page) + from; 572 lock_page(page); 573 err = __ext2_write_begin(NULL, page->mapping, pos, to - from, 0, 574 &page, NULL); 575 BUG_ON(err); 576 if (pde) 577 pde->rec_len = cpu_to_le16(to - from); 578 dir->inode = 0; 579 err = ext2_commit_chunk(page, pos, to - from); 580 inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC; 581 EXT2_I(inode)->i_flags &= ~EXT2_BTREE_FL; 582 mark_inode_dirty(inode); 583 out: 584 ext2_put_page(page); 585 return err; 586 } 587 588 /* 589 * Set the first fragment of directory. 590 */ 591 int ext2_make_empty(struct inode *inode, struct inode *parent) 592 { 593 struct address_space *mapping = inode->i_mapping; 594 struct page *page = grab_cache_page(mapping, 0); 595 unsigned chunk_size = ext2_chunk_size(inode); 596 struct ext2_dir_entry_2 * de; 597 int err; 598 void *kaddr; 599 600 if (!page) 601 return -ENOMEM; 602 603 err = __ext2_write_begin(NULL, page->mapping, 0, chunk_size, 0, 604 &page, NULL); 605 if (err) { 606 unlock_page(page); 607 goto fail; 608 } 609 kaddr = kmap_atomic(page, KM_USER0); 610 memset(kaddr, 0, chunk_size); 611 de = (struct ext2_dir_entry_2 *)kaddr; 612 de->name_len = 1; 613 de->rec_len = cpu_to_le16(EXT2_DIR_REC_LEN(1)); 614 memcpy (de->name, ".\0\0", 4); 615 de->inode = cpu_to_le32(inode->i_ino); 616 ext2_set_de_type (de, inode); 617 618 de = (struct ext2_dir_entry_2 *)(kaddr + EXT2_DIR_REC_LEN(1)); 619 de->name_len = 2; 620 de->rec_len = cpu_to_le16(chunk_size - EXT2_DIR_REC_LEN(1)); 621 de->inode = cpu_to_le32(parent->i_ino); 622 memcpy (de->name, "..\0", 4); 623 ext2_set_de_type (de, inode); 624 kunmap_atomic(kaddr, KM_USER0); 625 err = ext2_commit_chunk(page, 0, chunk_size); 626 fail: 627 page_cache_release(page); 628 return err; 629 } 630 631 /* 632 * routine to check that the specified directory is empty (for rmdir) 633 */ 634 int ext2_empty_dir (struct inode * inode) 635 { 636 struct page *page = NULL; 637 unsigned long i, npages = dir_pages(inode); 638 639 for (i = 0; i < npages; i++) { 640 char *kaddr; 641 ext2_dirent * de; 642 page = ext2_get_page(inode, i); 643 644 if (IS_ERR(page)) 645 continue; 646 647 kaddr = page_address(page); 648 de = (ext2_dirent *)kaddr; 649 kaddr += ext2_last_byte(inode, i) - EXT2_DIR_REC_LEN(1); 650 651 while ((char *)de <= kaddr) { 652 if (de->rec_len == 0) { 653 ext2_error(inode->i_sb, __FUNCTION__, 654 "zero-length directory entry"); 655 printk("kaddr=%p, de=%p\n", kaddr, de); 656 goto not_empty; 657 } 658 if (de->inode != 0) { 659 /* check for . and .. */ 660 if (de->name[0] != '.') 661 goto not_empty; 662 if (de->name_len > 2) 663 goto not_empty; 664 if (de->name_len < 2) { 665 if (de->inode != 666 cpu_to_le32(inode->i_ino)) 667 goto not_empty; 668 } else if (de->name[1] != '.') 669 goto not_empty; 670 } 671 de = ext2_next_entry(de); 672 } 673 ext2_put_page(page); 674 } 675 return 1; 676 677 not_empty: 678 ext2_put_page(page); 679 return 0; 680 } 681 682 const struct file_operations ext2_dir_operations = { 683 .llseek = generic_file_llseek, 684 .read = generic_read_dir, 685 .readdir = ext2_readdir, 686 .ioctl = ext2_ioctl, 687 #ifdef CONFIG_COMPAT 688 .compat_ioctl = ext2_compat_ioctl, 689 #endif 690 .fsync = ext2_sync_file, 691 }; 692