1 /* 2 * fs/f2fs/namei.c 3 * 4 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 5 * http://www.samsung.com/ 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #include <linux/fs.h> 12 #include <linux/f2fs_fs.h> 13 #include <linux/pagemap.h> 14 #include <linux/sched.h> 15 #include <linux/ctype.h> 16 #include <linux/dcache.h> 17 #include <linux/namei.h> 18 19 #include "f2fs.h" 20 #include "node.h" 21 #include "xattr.h" 22 #include "acl.h" 23 #include <trace/events/f2fs.h> 24 25 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) 26 { 27 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 28 nid_t ino; 29 struct inode *inode; 30 bool nid_free = false; 31 int err; 32 33 inode = new_inode(dir->i_sb); 34 if (!inode) 35 return ERR_PTR(-ENOMEM); 36 37 f2fs_lock_op(sbi); 38 if (!alloc_nid(sbi, &ino)) { 39 f2fs_unlock_op(sbi); 40 err = -ENOSPC; 41 goto fail; 42 } 43 f2fs_unlock_op(sbi); 44 45 inode_init_owner(inode, dir, mode); 46 47 inode->i_ino = ino; 48 inode->i_blocks = 0; 49 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; 50 inode->i_generation = sbi->s_next_generation++; 51 52 err = insert_inode_locked(inode); 53 if (err) { 54 err = -EINVAL; 55 nid_free = true; 56 goto out; 57 } 58 59 if (f2fs_may_inline(inode)) 60 set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); 61 if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode)) 62 set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); 63 64 trace_f2fs_new_inode(inode, 0); 65 mark_inode_dirty(inode); 66 return inode; 67 68 out: 69 clear_nlink(inode); 70 unlock_new_inode(inode); 71 fail: 72 trace_f2fs_new_inode(inode, err); 73 make_bad_inode(inode); 74 iput(inode); 75 if (nid_free) 76 alloc_nid_failed(sbi, ino); 77 return ERR_PTR(err); 78 } 79 80 static int is_multimedia_file(const unsigned char *s, const char *sub) 81 { 82 size_t slen = strlen(s); 83 size_t sublen = strlen(sub); 84 85 if (sublen > slen) 86 return 0; 87 88 return !strncasecmp(s + slen - sublen, sub, sublen); 89 } 90 91 /* 92 * Set multimedia files as cold files for hot/cold data separation 93 */ 94 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, 95 const unsigned char *name) 96 { 97 int i; 98 __u8 (*extlist)[8] = sbi->raw_super->extension_list; 99 100 int count = le32_to_cpu(sbi->raw_super->extension_count); 101 for (i = 0; i < count; i++) { 102 if (is_multimedia_file(name, extlist[i])) { 103 file_set_cold(inode); 104 break; 105 } 106 } 107 } 108 109 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, 110 bool excl) 111 { 112 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 113 struct inode *inode; 114 nid_t ino = 0; 115 int err; 116 117 f2fs_balance_fs(sbi); 118 119 inode = f2fs_new_inode(dir, mode); 120 if (IS_ERR(inode)) 121 return PTR_ERR(inode); 122 123 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) 124 set_cold_files(sbi, inode, dentry->d_name.name); 125 126 inode->i_op = &f2fs_file_inode_operations; 127 inode->i_fop = &f2fs_file_operations; 128 inode->i_mapping->a_ops = &f2fs_dblock_aops; 129 ino = inode->i_ino; 130 131 f2fs_lock_op(sbi); 132 err = f2fs_add_link(dentry, inode); 133 if (err) 134 goto out; 135 f2fs_unlock_op(sbi); 136 137 alloc_nid_done(sbi, ino); 138 139 stat_inc_inline_inode(inode); 140 d_instantiate(dentry, inode); 141 unlock_new_inode(inode); 142 143 if (IS_DIRSYNC(dir)) 144 f2fs_sync_fs(sbi->sb, 1); 145 return 0; 146 out: 147 handle_failed_inode(inode); 148 return err; 149 } 150 151 static int f2fs_link(struct dentry *old_dentry, struct inode *dir, 152 struct dentry *dentry) 153 { 154 struct inode *inode = d_inode(old_dentry); 155 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 156 int err; 157 158 f2fs_balance_fs(sbi); 159 160 inode->i_ctime = CURRENT_TIME; 161 ihold(inode); 162 163 set_inode_flag(F2FS_I(inode), FI_INC_LINK); 164 f2fs_lock_op(sbi); 165 err = f2fs_add_link(dentry, inode); 166 if (err) 167 goto out; 168 f2fs_unlock_op(sbi); 169 170 d_instantiate(dentry, inode); 171 172 if (IS_DIRSYNC(dir)) 173 f2fs_sync_fs(sbi->sb, 1); 174 return 0; 175 out: 176 clear_inode_flag(F2FS_I(inode), FI_INC_LINK); 177 iput(inode); 178 f2fs_unlock_op(sbi); 179 return err; 180 } 181 182 struct dentry *f2fs_get_parent(struct dentry *child) 183 { 184 struct qstr dotdot = QSTR_INIT("..", 2); 185 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); 186 if (!ino) 187 return ERR_PTR(-ENOENT); 188 return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino)); 189 } 190 191 static int __recover_dot_dentries(struct inode *dir, nid_t pino) 192 { 193 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 194 struct qstr dot = QSTR_INIT(".", 1); 195 struct qstr dotdot = QSTR_INIT("..", 2); 196 struct f2fs_dir_entry *de; 197 struct page *page; 198 int err = 0; 199 200 f2fs_lock_op(sbi); 201 202 de = f2fs_find_entry(dir, &dot, &page); 203 if (de) { 204 f2fs_dentry_kunmap(dir, page); 205 f2fs_put_page(page, 0); 206 } else { 207 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); 208 if (err) 209 goto out; 210 } 211 212 de = f2fs_find_entry(dir, &dotdot, &page); 213 if (de) { 214 f2fs_dentry_kunmap(dir, page); 215 f2fs_put_page(page, 0); 216 } else { 217 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); 218 } 219 out: 220 if (!err) { 221 clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); 222 mark_inode_dirty(dir); 223 } 224 225 f2fs_unlock_op(sbi); 226 return err; 227 } 228 229 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, 230 unsigned int flags) 231 { 232 struct inode *inode = NULL; 233 struct f2fs_dir_entry *de; 234 struct page *page; 235 236 if (dentry->d_name.len > F2FS_NAME_LEN) 237 return ERR_PTR(-ENAMETOOLONG); 238 239 de = f2fs_find_entry(dir, &dentry->d_name, &page); 240 if (de) { 241 nid_t ino = le32_to_cpu(de->ino); 242 f2fs_dentry_kunmap(dir, page); 243 f2fs_put_page(page, 0); 244 245 inode = f2fs_iget(dir->i_sb, ino); 246 if (IS_ERR(inode)) 247 return ERR_CAST(inode); 248 249 if (f2fs_has_inline_dots(inode)) { 250 int err; 251 252 err = __recover_dot_dentries(inode, dir->i_ino); 253 if (err) { 254 iget_failed(inode); 255 return ERR_PTR(err); 256 } 257 } 258 } 259 260 return d_splice_alias(inode, dentry); 261 } 262 263 static int f2fs_unlink(struct inode *dir, struct dentry *dentry) 264 { 265 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 266 struct inode *inode = d_inode(dentry); 267 struct f2fs_dir_entry *de; 268 struct page *page; 269 int err = -ENOENT; 270 271 trace_f2fs_unlink_enter(dir, dentry); 272 f2fs_balance_fs(sbi); 273 274 de = f2fs_find_entry(dir, &dentry->d_name, &page); 275 if (!de) 276 goto fail; 277 278 f2fs_lock_op(sbi); 279 err = acquire_orphan_inode(sbi); 280 if (err) { 281 f2fs_unlock_op(sbi); 282 f2fs_dentry_kunmap(dir, page); 283 f2fs_put_page(page, 0); 284 goto fail; 285 } 286 f2fs_delete_entry(de, page, dir, inode); 287 f2fs_unlock_op(sbi); 288 289 /* In order to evict this inode, we set it dirty */ 290 mark_inode_dirty(inode); 291 292 if (IS_DIRSYNC(dir)) 293 f2fs_sync_fs(sbi->sb, 1); 294 fail: 295 trace_f2fs_unlink_exit(inode, err); 296 return err; 297 } 298 299 static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd) 300 { 301 struct page *page; 302 303 page = page_follow_link_light(dentry, nd); 304 if (IS_ERR(page)) 305 return page; 306 307 /* this is broken symlink case */ 308 if (*nd_get_link(nd) == 0) { 309 kunmap(page); 310 page_cache_release(page); 311 return ERR_PTR(-ENOENT); 312 } 313 return page; 314 } 315 316 static int f2fs_symlink(struct inode *dir, struct dentry *dentry, 317 const char *symname) 318 { 319 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 320 struct inode *inode; 321 size_t symlen = strlen(symname) + 1; 322 int err; 323 324 f2fs_balance_fs(sbi); 325 326 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); 327 if (IS_ERR(inode)) 328 return PTR_ERR(inode); 329 330 inode->i_op = &f2fs_symlink_inode_operations; 331 inode->i_mapping->a_ops = &f2fs_dblock_aops; 332 333 f2fs_lock_op(sbi); 334 err = f2fs_add_link(dentry, inode); 335 if (err) 336 goto out; 337 f2fs_unlock_op(sbi); 338 339 err = page_symlink(inode, symname, symlen); 340 alloc_nid_done(sbi, inode->i_ino); 341 342 d_instantiate(dentry, inode); 343 unlock_new_inode(inode); 344 345 /* 346 * Let's flush symlink data in order to avoid broken symlink as much as 347 * possible. Nevertheless, fsyncing is the best way, but there is no 348 * way to get a file descriptor in order to flush that. 349 * 350 * Note that, it needs to do dir->fsync to make this recoverable. 351 * If the symlink path is stored into inline_data, there is no 352 * performance regression. 353 */ 354 filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); 355 356 if (IS_DIRSYNC(dir)) 357 f2fs_sync_fs(sbi->sb, 1); 358 return err; 359 out: 360 handle_failed_inode(inode); 361 return err; 362 } 363 364 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 365 { 366 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 367 struct inode *inode; 368 int err; 369 370 f2fs_balance_fs(sbi); 371 372 inode = f2fs_new_inode(dir, S_IFDIR | mode); 373 if (IS_ERR(inode)) 374 return PTR_ERR(inode); 375 376 inode->i_op = &f2fs_dir_inode_operations; 377 inode->i_fop = &f2fs_dir_operations; 378 inode->i_mapping->a_ops = &f2fs_dblock_aops; 379 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); 380 381 set_inode_flag(F2FS_I(inode), FI_INC_LINK); 382 f2fs_lock_op(sbi); 383 err = f2fs_add_link(dentry, inode); 384 if (err) 385 goto out_fail; 386 f2fs_unlock_op(sbi); 387 388 stat_inc_inline_dir(inode); 389 alloc_nid_done(sbi, inode->i_ino); 390 391 d_instantiate(dentry, inode); 392 unlock_new_inode(inode); 393 394 if (IS_DIRSYNC(dir)) 395 f2fs_sync_fs(sbi->sb, 1); 396 return 0; 397 398 out_fail: 399 clear_inode_flag(F2FS_I(inode), FI_INC_LINK); 400 handle_failed_inode(inode); 401 return err; 402 } 403 404 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) 405 { 406 struct inode *inode = d_inode(dentry); 407 if (f2fs_empty_dir(inode)) 408 return f2fs_unlink(dir, dentry); 409 return -ENOTEMPTY; 410 } 411 412 static int f2fs_mknod(struct inode *dir, struct dentry *dentry, 413 umode_t mode, dev_t rdev) 414 { 415 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 416 struct inode *inode; 417 int err = 0; 418 419 if (!new_valid_dev(rdev)) 420 return -EINVAL; 421 422 f2fs_balance_fs(sbi); 423 424 inode = f2fs_new_inode(dir, mode); 425 if (IS_ERR(inode)) 426 return PTR_ERR(inode); 427 428 init_special_inode(inode, inode->i_mode, rdev); 429 inode->i_op = &f2fs_special_inode_operations; 430 431 f2fs_lock_op(sbi); 432 err = f2fs_add_link(dentry, inode); 433 if (err) 434 goto out; 435 f2fs_unlock_op(sbi); 436 437 alloc_nid_done(sbi, inode->i_ino); 438 439 d_instantiate(dentry, inode); 440 unlock_new_inode(inode); 441 442 if (IS_DIRSYNC(dir)) 443 f2fs_sync_fs(sbi->sb, 1); 444 return 0; 445 out: 446 handle_failed_inode(inode); 447 return err; 448 } 449 450 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, 451 struct inode *new_dir, struct dentry *new_dentry) 452 { 453 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); 454 struct inode *old_inode = d_inode(old_dentry); 455 struct inode *new_inode = d_inode(new_dentry); 456 struct page *old_dir_page; 457 struct page *old_page, *new_page; 458 struct f2fs_dir_entry *old_dir_entry = NULL; 459 struct f2fs_dir_entry *old_entry; 460 struct f2fs_dir_entry *new_entry; 461 int err = -ENOENT; 462 463 f2fs_balance_fs(sbi); 464 465 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); 466 if (!old_entry) 467 goto out; 468 469 if (S_ISDIR(old_inode->i_mode)) { 470 err = -EIO; 471 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); 472 if (!old_dir_entry) 473 goto out_old; 474 } 475 476 if (new_inode) { 477 478 err = -ENOTEMPTY; 479 if (old_dir_entry && !f2fs_empty_dir(new_inode)) 480 goto out_dir; 481 482 err = -ENOENT; 483 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, 484 &new_page); 485 if (!new_entry) 486 goto out_dir; 487 488 f2fs_lock_op(sbi); 489 490 err = acquire_orphan_inode(sbi); 491 if (err) 492 goto put_out_dir; 493 494 if (update_dent_inode(old_inode, &new_dentry->d_name)) { 495 release_orphan_inode(sbi); 496 goto put_out_dir; 497 } 498 499 f2fs_set_link(new_dir, new_entry, new_page, old_inode); 500 501 new_inode->i_ctime = CURRENT_TIME; 502 down_write(&F2FS_I(new_inode)->i_sem); 503 if (old_dir_entry) 504 drop_nlink(new_inode); 505 drop_nlink(new_inode); 506 up_write(&F2FS_I(new_inode)->i_sem); 507 508 mark_inode_dirty(new_inode); 509 510 if (!new_inode->i_nlink) 511 add_orphan_inode(sbi, new_inode->i_ino); 512 else 513 release_orphan_inode(sbi); 514 515 update_inode_page(old_inode); 516 update_inode_page(new_inode); 517 } else { 518 f2fs_lock_op(sbi); 519 520 err = f2fs_add_link(new_dentry, old_inode); 521 if (err) { 522 f2fs_unlock_op(sbi); 523 goto out_dir; 524 } 525 526 if (old_dir_entry) { 527 inc_nlink(new_dir); 528 update_inode_page(new_dir); 529 } 530 } 531 532 down_write(&F2FS_I(old_inode)->i_sem); 533 file_lost_pino(old_inode); 534 up_write(&F2FS_I(old_inode)->i_sem); 535 536 old_inode->i_ctime = CURRENT_TIME; 537 mark_inode_dirty(old_inode); 538 539 f2fs_delete_entry(old_entry, old_page, old_dir, NULL); 540 541 if (old_dir_entry) { 542 if (old_dir != new_dir) { 543 f2fs_set_link(old_inode, old_dir_entry, 544 old_dir_page, new_dir); 545 update_inode_page(old_inode); 546 } else { 547 f2fs_dentry_kunmap(old_inode, old_dir_page); 548 f2fs_put_page(old_dir_page, 0); 549 } 550 drop_nlink(old_dir); 551 mark_inode_dirty(old_dir); 552 update_inode_page(old_dir); 553 } 554 555 f2fs_unlock_op(sbi); 556 557 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) 558 f2fs_sync_fs(sbi->sb, 1); 559 return 0; 560 561 put_out_dir: 562 f2fs_unlock_op(sbi); 563 f2fs_dentry_kunmap(new_dir, new_page); 564 f2fs_put_page(new_page, 0); 565 out_dir: 566 if (old_dir_entry) { 567 f2fs_dentry_kunmap(old_inode, old_dir_page); 568 f2fs_put_page(old_dir_page, 0); 569 } 570 out_old: 571 f2fs_dentry_kunmap(old_dir, old_page); 572 f2fs_put_page(old_page, 0); 573 out: 574 return err; 575 } 576 577 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, 578 struct inode *new_dir, struct dentry *new_dentry) 579 { 580 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); 581 struct inode *old_inode = d_inode(old_dentry); 582 struct inode *new_inode = d_inode(new_dentry); 583 struct page *old_dir_page, *new_dir_page; 584 struct page *old_page, *new_page; 585 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; 586 struct f2fs_dir_entry *old_entry, *new_entry; 587 int old_nlink = 0, new_nlink = 0; 588 int err = -ENOENT; 589 590 f2fs_balance_fs(sbi); 591 592 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); 593 if (!old_entry) 594 goto out; 595 596 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); 597 if (!new_entry) 598 goto out_old; 599 600 /* prepare for updating ".." directory entry info later */ 601 if (old_dir != new_dir) { 602 if (S_ISDIR(old_inode->i_mode)) { 603 err = -EIO; 604 old_dir_entry = f2fs_parent_dir(old_inode, 605 &old_dir_page); 606 if (!old_dir_entry) 607 goto out_new; 608 } 609 610 if (S_ISDIR(new_inode->i_mode)) { 611 err = -EIO; 612 new_dir_entry = f2fs_parent_dir(new_inode, 613 &new_dir_page); 614 if (!new_dir_entry) 615 goto out_old_dir; 616 } 617 } 618 619 /* 620 * If cross rename between file and directory those are not 621 * in the same directory, we will inc nlink of file's parent 622 * later, so we should check upper boundary of its nlink. 623 */ 624 if ((!old_dir_entry || !new_dir_entry) && 625 old_dir_entry != new_dir_entry) { 626 old_nlink = old_dir_entry ? -1 : 1; 627 new_nlink = -old_nlink; 628 err = -EMLINK; 629 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || 630 (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) 631 goto out_new_dir; 632 } 633 634 f2fs_lock_op(sbi); 635 636 err = update_dent_inode(old_inode, &new_dentry->d_name); 637 if (err) 638 goto out_unlock; 639 640 err = update_dent_inode(new_inode, &old_dentry->d_name); 641 if (err) 642 goto out_undo; 643 644 /* update ".." directory entry info of old dentry */ 645 if (old_dir_entry) 646 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); 647 648 /* update ".." directory entry info of new dentry */ 649 if (new_dir_entry) 650 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); 651 652 /* update directory entry info of old dir inode */ 653 f2fs_set_link(old_dir, old_entry, old_page, new_inode); 654 655 down_write(&F2FS_I(old_inode)->i_sem); 656 file_lost_pino(old_inode); 657 up_write(&F2FS_I(old_inode)->i_sem); 658 659 update_inode_page(old_inode); 660 661 old_dir->i_ctime = CURRENT_TIME; 662 if (old_nlink) { 663 down_write(&F2FS_I(old_dir)->i_sem); 664 if (old_nlink < 0) 665 drop_nlink(old_dir); 666 else 667 inc_nlink(old_dir); 668 up_write(&F2FS_I(old_dir)->i_sem); 669 } 670 mark_inode_dirty(old_dir); 671 update_inode_page(old_dir); 672 673 /* update directory entry info of new dir inode */ 674 f2fs_set_link(new_dir, new_entry, new_page, old_inode); 675 676 down_write(&F2FS_I(new_inode)->i_sem); 677 file_lost_pino(new_inode); 678 up_write(&F2FS_I(new_inode)->i_sem); 679 680 update_inode_page(new_inode); 681 682 new_dir->i_ctime = CURRENT_TIME; 683 if (new_nlink) { 684 down_write(&F2FS_I(new_dir)->i_sem); 685 if (new_nlink < 0) 686 drop_nlink(new_dir); 687 else 688 inc_nlink(new_dir); 689 up_write(&F2FS_I(new_dir)->i_sem); 690 } 691 mark_inode_dirty(new_dir); 692 update_inode_page(new_dir); 693 694 f2fs_unlock_op(sbi); 695 696 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) 697 f2fs_sync_fs(sbi->sb, 1); 698 return 0; 699 out_undo: 700 /* Still we may fail to recover name info of f2fs_inode here */ 701 update_dent_inode(old_inode, &old_dentry->d_name); 702 out_unlock: 703 f2fs_unlock_op(sbi); 704 out_new_dir: 705 if (new_dir_entry) { 706 f2fs_dentry_kunmap(new_inode, new_dir_page); 707 f2fs_put_page(new_dir_page, 0); 708 } 709 out_old_dir: 710 if (old_dir_entry) { 711 f2fs_dentry_kunmap(old_inode, old_dir_page); 712 f2fs_put_page(old_dir_page, 0); 713 } 714 out_new: 715 f2fs_dentry_kunmap(new_dir, new_page); 716 f2fs_put_page(new_page, 0); 717 out_old: 718 f2fs_dentry_kunmap(old_dir, old_page); 719 f2fs_put_page(old_page, 0); 720 out: 721 return err; 722 } 723 724 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, 725 struct inode *new_dir, struct dentry *new_dentry, 726 unsigned int flags) 727 { 728 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) 729 return -EINVAL; 730 731 if (flags & RENAME_EXCHANGE) { 732 return f2fs_cross_rename(old_dir, old_dentry, 733 new_dir, new_dentry); 734 } 735 /* 736 * VFS has already handled the new dentry existence case, 737 * here, we just deal with "RENAME_NOREPLACE" as regular rename. 738 */ 739 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); 740 } 741 742 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) 743 { 744 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 745 struct inode *inode; 746 int err; 747 748 inode = f2fs_new_inode(dir, mode); 749 if (IS_ERR(inode)) 750 return PTR_ERR(inode); 751 752 inode->i_op = &f2fs_file_inode_operations; 753 inode->i_fop = &f2fs_file_operations; 754 inode->i_mapping->a_ops = &f2fs_dblock_aops; 755 756 f2fs_lock_op(sbi); 757 err = acquire_orphan_inode(sbi); 758 if (err) 759 goto out; 760 761 err = f2fs_do_tmpfile(inode, dir); 762 if (err) 763 goto release_out; 764 765 /* 766 * add this non-linked tmpfile to orphan list, in this way we could 767 * remove all unused data of tmpfile after abnormal power-off. 768 */ 769 add_orphan_inode(sbi, inode->i_ino); 770 f2fs_unlock_op(sbi); 771 772 alloc_nid_done(sbi, inode->i_ino); 773 774 stat_inc_inline_inode(inode); 775 d_tmpfile(dentry, inode); 776 unlock_new_inode(inode); 777 return 0; 778 779 release_out: 780 release_orphan_inode(sbi); 781 out: 782 handle_failed_inode(inode); 783 return err; 784 } 785 786 const struct inode_operations f2fs_dir_inode_operations = { 787 .create = f2fs_create, 788 .lookup = f2fs_lookup, 789 .link = f2fs_link, 790 .unlink = f2fs_unlink, 791 .symlink = f2fs_symlink, 792 .mkdir = f2fs_mkdir, 793 .rmdir = f2fs_rmdir, 794 .mknod = f2fs_mknod, 795 .rename2 = f2fs_rename2, 796 .tmpfile = f2fs_tmpfile, 797 .getattr = f2fs_getattr, 798 .setattr = f2fs_setattr, 799 .get_acl = f2fs_get_acl, 800 .set_acl = f2fs_set_acl, 801 #ifdef CONFIG_F2FS_FS_XATTR 802 .setxattr = generic_setxattr, 803 .getxattr = generic_getxattr, 804 .listxattr = f2fs_listxattr, 805 .removexattr = generic_removexattr, 806 #endif 807 }; 808 809 const struct inode_operations f2fs_symlink_inode_operations = { 810 .readlink = generic_readlink, 811 .follow_link = f2fs_follow_link, 812 .put_link = page_put_link, 813 .getattr = f2fs_getattr, 814 .setattr = f2fs_setattr, 815 #ifdef CONFIG_F2FS_FS_XATTR 816 .setxattr = generic_setxattr, 817 .getxattr = generic_getxattr, 818 .listxattr = f2fs_listxattr, 819 .removexattr = generic_removexattr, 820 #endif 821 }; 822 823 const struct inode_operations f2fs_special_inode_operations = { 824 .getattr = f2fs_getattr, 825 .setattr = f2fs_setattr, 826 .get_acl = f2fs_get_acl, 827 .set_acl = f2fs_set_acl, 828 #ifdef CONFIG_F2FS_FS_XATTR 829 .setxattr = generic_setxattr, 830 .getxattr = generic_getxattr, 831 .listxattr = f2fs_listxattr, 832 .removexattr = generic_removexattr, 833 #endif 834 }; 835