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 const char *f2fs_follow_link(struct dentry *dentry, void **cookie) 300 { 301 const char *link = page_follow_link_light(dentry, cookie); 302 if (!IS_ERR(link) && !*link) { 303 /* this is broken symlink case */ 304 page_put_link(NULL, *cookie); 305 link = ERR_PTR(-ENOENT); 306 } 307 return link; 308 } 309 310 static int f2fs_symlink(struct inode *dir, struct dentry *dentry, 311 const char *symname) 312 { 313 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 314 struct inode *inode; 315 size_t symlen = strlen(symname) + 1; 316 int err; 317 318 f2fs_balance_fs(sbi); 319 320 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); 321 if (IS_ERR(inode)) 322 return PTR_ERR(inode); 323 324 inode->i_op = &f2fs_symlink_inode_operations; 325 inode->i_mapping->a_ops = &f2fs_dblock_aops; 326 327 f2fs_lock_op(sbi); 328 err = f2fs_add_link(dentry, inode); 329 if (err) 330 goto out; 331 f2fs_unlock_op(sbi); 332 333 err = page_symlink(inode, symname, symlen); 334 alloc_nid_done(sbi, inode->i_ino); 335 336 d_instantiate(dentry, inode); 337 unlock_new_inode(inode); 338 339 /* 340 * Let's flush symlink data in order to avoid broken symlink as much as 341 * possible. Nevertheless, fsyncing is the best way, but there is no 342 * way to get a file descriptor in order to flush that. 343 * 344 * Note that, it needs to do dir->fsync to make this recoverable. 345 * If the symlink path is stored into inline_data, there is no 346 * performance regression. 347 */ 348 filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); 349 350 if (IS_DIRSYNC(dir)) 351 f2fs_sync_fs(sbi->sb, 1); 352 return err; 353 out: 354 handle_failed_inode(inode); 355 return err; 356 } 357 358 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 359 { 360 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 361 struct inode *inode; 362 int err; 363 364 f2fs_balance_fs(sbi); 365 366 inode = f2fs_new_inode(dir, S_IFDIR | mode); 367 if (IS_ERR(inode)) 368 return PTR_ERR(inode); 369 370 inode->i_op = &f2fs_dir_inode_operations; 371 inode->i_fop = &f2fs_dir_operations; 372 inode->i_mapping->a_ops = &f2fs_dblock_aops; 373 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); 374 375 set_inode_flag(F2FS_I(inode), FI_INC_LINK); 376 f2fs_lock_op(sbi); 377 err = f2fs_add_link(dentry, inode); 378 if (err) 379 goto out_fail; 380 f2fs_unlock_op(sbi); 381 382 stat_inc_inline_dir(inode); 383 alloc_nid_done(sbi, inode->i_ino); 384 385 d_instantiate(dentry, inode); 386 unlock_new_inode(inode); 387 388 if (IS_DIRSYNC(dir)) 389 f2fs_sync_fs(sbi->sb, 1); 390 return 0; 391 392 out_fail: 393 clear_inode_flag(F2FS_I(inode), FI_INC_LINK); 394 handle_failed_inode(inode); 395 return err; 396 } 397 398 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) 399 { 400 struct inode *inode = d_inode(dentry); 401 if (f2fs_empty_dir(inode)) 402 return f2fs_unlink(dir, dentry); 403 return -ENOTEMPTY; 404 } 405 406 static int f2fs_mknod(struct inode *dir, struct dentry *dentry, 407 umode_t mode, dev_t rdev) 408 { 409 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 410 struct inode *inode; 411 int err = 0; 412 413 if (!new_valid_dev(rdev)) 414 return -EINVAL; 415 416 f2fs_balance_fs(sbi); 417 418 inode = f2fs_new_inode(dir, mode); 419 if (IS_ERR(inode)) 420 return PTR_ERR(inode); 421 422 init_special_inode(inode, inode->i_mode, rdev); 423 inode->i_op = &f2fs_special_inode_operations; 424 425 f2fs_lock_op(sbi); 426 err = f2fs_add_link(dentry, inode); 427 if (err) 428 goto out; 429 f2fs_unlock_op(sbi); 430 431 alloc_nid_done(sbi, inode->i_ino); 432 433 d_instantiate(dentry, inode); 434 unlock_new_inode(inode); 435 436 if (IS_DIRSYNC(dir)) 437 f2fs_sync_fs(sbi->sb, 1); 438 return 0; 439 out: 440 handle_failed_inode(inode); 441 return err; 442 } 443 444 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, 445 struct inode *new_dir, struct dentry *new_dentry) 446 { 447 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); 448 struct inode *old_inode = d_inode(old_dentry); 449 struct inode *new_inode = d_inode(new_dentry); 450 struct page *old_dir_page; 451 struct page *old_page, *new_page; 452 struct f2fs_dir_entry *old_dir_entry = NULL; 453 struct f2fs_dir_entry *old_entry; 454 struct f2fs_dir_entry *new_entry; 455 int err = -ENOENT; 456 457 f2fs_balance_fs(sbi); 458 459 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); 460 if (!old_entry) 461 goto out; 462 463 if (S_ISDIR(old_inode->i_mode)) { 464 err = -EIO; 465 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); 466 if (!old_dir_entry) 467 goto out_old; 468 } 469 470 if (new_inode) { 471 472 err = -ENOTEMPTY; 473 if (old_dir_entry && !f2fs_empty_dir(new_inode)) 474 goto out_dir; 475 476 err = -ENOENT; 477 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, 478 &new_page); 479 if (!new_entry) 480 goto out_dir; 481 482 f2fs_lock_op(sbi); 483 484 err = acquire_orphan_inode(sbi); 485 if (err) 486 goto put_out_dir; 487 488 if (update_dent_inode(old_inode, &new_dentry->d_name)) { 489 release_orphan_inode(sbi); 490 goto put_out_dir; 491 } 492 493 f2fs_set_link(new_dir, new_entry, new_page, old_inode); 494 495 new_inode->i_ctime = CURRENT_TIME; 496 down_write(&F2FS_I(new_inode)->i_sem); 497 if (old_dir_entry) 498 drop_nlink(new_inode); 499 drop_nlink(new_inode); 500 up_write(&F2FS_I(new_inode)->i_sem); 501 502 mark_inode_dirty(new_inode); 503 504 if (!new_inode->i_nlink) 505 add_orphan_inode(sbi, new_inode->i_ino); 506 else 507 release_orphan_inode(sbi); 508 509 update_inode_page(old_inode); 510 update_inode_page(new_inode); 511 } else { 512 f2fs_lock_op(sbi); 513 514 err = f2fs_add_link(new_dentry, old_inode); 515 if (err) { 516 f2fs_unlock_op(sbi); 517 goto out_dir; 518 } 519 520 if (old_dir_entry) { 521 inc_nlink(new_dir); 522 update_inode_page(new_dir); 523 } 524 } 525 526 down_write(&F2FS_I(old_inode)->i_sem); 527 file_lost_pino(old_inode); 528 up_write(&F2FS_I(old_inode)->i_sem); 529 530 old_inode->i_ctime = CURRENT_TIME; 531 mark_inode_dirty(old_inode); 532 533 f2fs_delete_entry(old_entry, old_page, old_dir, NULL); 534 535 if (old_dir_entry) { 536 if (old_dir != new_dir) { 537 f2fs_set_link(old_inode, old_dir_entry, 538 old_dir_page, new_dir); 539 update_inode_page(old_inode); 540 } else { 541 f2fs_dentry_kunmap(old_inode, old_dir_page); 542 f2fs_put_page(old_dir_page, 0); 543 } 544 drop_nlink(old_dir); 545 mark_inode_dirty(old_dir); 546 update_inode_page(old_dir); 547 } 548 549 f2fs_unlock_op(sbi); 550 551 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) 552 f2fs_sync_fs(sbi->sb, 1); 553 return 0; 554 555 put_out_dir: 556 f2fs_unlock_op(sbi); 557 f2fs_dentry_kunmap(new_dir, new_page); 558 f2fs_put_page(new_page, 0); 559 out_dir: 560 if (old_dir_entry) { 561 f2fs_dentry_kunmap(old_inode, old_dir_page); 562 f2fs_put_page(old_dir_page, 0); 563 } 564 out_old: 565 f2fs_dentry_kunmap(old_dir, old_page); 566 f2fs_put_page(old_page, 0); 567 out: 568 return err; 569 } 570 571 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, 572 struct inode *new_dir, struct dentry *new_dentry) 573 { 574 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); 575 struct inode *old_inode = d_inode(old_dentry); 576 struct inode *new_inode = d_inode(new_dentry); 577 struct page *old_dir_page, *new_dir_page; 578 struct page *old_page, *new_page; 579 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; 580 struct f2fs_dir_entry *old_entry, *new_entry; 581 int old_nlink = 0, new_nlink = 0; 582 int err = -ENOENT; 583 584 f2fs_balance_fs(sbi); 585 586 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); 587 if (!old_entry) 588 goto out; 589 590 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); 591 if (!new_entry) 592 goto out_old; 593 594 /* prepare for updating ".." directory entry info later */ 595 if (old_dir != new_dir) { 596 if (S_ISDIR(old_inode->i_mode)) { 597 err = -EIO; 598 old_dir_entry = f2fs_parent_dir(old_inode, 599 &old_dir_page); 600 if (!old_dir_entry) 601 goto out_new; 602 } 603 604 if (S_ISDIR(new_inode->i_mode)) { 605 err = -EIO; 606 new_dir_entry = f2fs_parent_dir(new_inode, 607 &new_dir_page); 608 if (!new_dir_entry) 609 goto out_old_dir; 610 } 611 } 612 613 /* 614 * If cross rename between file and directory those are not 615 * in the same directory, we will inc nlink of file's parent 616 * later, so we should check upper boundary of its nlink. 617 */ 618 if ((!old_dir_entry || !new_dir_entry) && 619 old_dir_entry != new_dir_entry) { 620 old_nlink = old_dir_entry ? -1 : 1; 621 new_nlink = -old_nlink; 622 err = -EMLINK; 623 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || 624 (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) 625 goto out_new_dir; 626 } 627 628 f2fs_lock_op(sbi); 629 630 err = update_dent_inode(old_inode, &new_dentry->d_name); 631 if (err) 632 goto out_unlock; 633 634 err = update_dent_inode(new_inode, &old_dentry->d_name); 635 if (err) 636 goto out_undo; 637 638 /* update ".." directory entry info of old dentry */ 639 if (old_dir_entry) 640 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); 641 642 /* update ".." directory entry info of new dentry */ 643 if (new_dir_entry) 644 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); 645 646 /* update directory entry info of old dir inode */ 647 f2fs_set_link(old_dir, old_entry, old_page, new_inode); 648 649 down_write(&F2FS_I(old_inode)->i_sem); 650 file_lost_pino(old_inode); 651 up_write(&F2FS_I(old_inode)->i_sem); 652 653 update_inode_page(old_inode); 654 655 old_dir->i_ctime = CURRENT_TIME; 656 if (old_nlink) { 657 down_write(&F2FS_I(old_dir)->i_sem); 658 if (old_nlink < 0) 659 drop_nlink(old_dir); 660 else 661 inc_nlink(old_dir); 662 up_write(&F2FS_I(old_dir)->i_sem); 663 } 664 mark_inode_dirty(old_dir); 665 update_inode_page(old_dir); 666 667 /* update directory entry info of new dir inode */ 668 f2fs_set_link(new_dir, new_entry, new_page, old_inode); 669 670 down_write(&F2FS_I(new_inode)->i_sem); 671 file_lost_pino(new_inode); 672 up_write(&F2FS_I(new_inode)->i_sem); 673 674 update_inode_page(new_inode); 675 676 new_dir->i_ctime = CURRENT_TIME; 677 if (new_nlink) { 678 down_write(&F2FS_I(new_dir)->i_sem); 679 if (new_nlink < 0) 680 drop_nlink(new_dir); 681 else 682 inc_nlink(new_dir); 683 up_write(&F2FS_I(new_dir)->i_sem); 684 } 685 mark_inode_dirty(new_dir); 686 update_inode_page(new_dir); 687 688 f2fs_unlock_op(sbi); 689 690 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) 691 f2fs_sync_fs(sbi->sb, 1); 692 return 0; 693 out_undo: 694 /* Still we may fail to recover name info of f2fs_inode here */ 695 update_dent_inode(old_inode, &old_dentry->d_name); 696 out_unlock: 697 f2fs_unlock_op(sbi); 698 out_new_dir: 699 if (new_dir_entry) { 700 f2fs_dentry_kunmap(new_inode, new_dir_page); 701 f2fs_put_page(new_dir_page, 0); 702 } 703 out_old_dir: 704 if (old_dir_entry) { 705 f2fs_dentry_kunmap(old_inode, old_dir_page); 706 f2fs_put_page(old_dir_page, 0); 707 } 708 out_new: 709 f2fs_dentry_kunmap(new_dir, new_page); 710 f2fs_put_page(new_page, 0); 711 out_old: 712 f2fs_dentry_kunmap(old_dir, old_page); 713 f2fs_put_page(old_page, 0); 714 out: 715 return err; 716 } 717 718 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, 719 struct inode *new_dir, struct dentry *new_dentry, 720 unsigned int flags) 721 { 722 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) 723 return -EINVAL; 724 725 if (flags & RENAME_EXCHANGE) { 726 return f2fs_cross_rename(old_dir, old_dentry, 727 new_dir, new_dentry); 728 } 729 /* 730 * VFS has already handled the new dentry existence case, 731 * here, we just deal with "RENAME_NOREPLACE" as regular rename. 732 */ 733 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); 734 } 735 736 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) 737 { 738 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 739 struct inode *inode; 740 int err; 741 742 inode = f2fs_new_inode(dir, mode); 743 if (IS_ERR(inode)) 744 return PTR_ERR(inode); 745 746 inode->i_op = &f2fs_file_inode_operations; 747 inode->i_fop = &f2fs_file_operations; 748 inode->i_mapping->a_ops = &f2fs_dblock_aops; 749 750 f2fs_lock_op(sbi); 751 err = acquire_orphan_inode(sbi); 752 if (err) 753 goto out; 754 755 err = f2fs_do_tmpfile(inode, dir); 756 if (err) 757 goto release_out; 758 759 /* 760 * add this non-linked tmpfile to orphan list, in this way we could 761 * remove all unused data of tmpfile after abnormal power-off. 762 */ 763 add_orphan_inode(sbi, inode->i_ino); 764 f2fs_unlock_op(sbi); 765 766 alloc_nid_done(sbi, inode->i_ino); 767 768 stat_inc_inline_inode(inode); 769 d_tmpfile(dentry, inode); 770 unlock_new_inode(inode); 771 return 0; 772 773 release_out: 774 release_orphan_inode(sbi); 775 out: 776 handle_failed_inode(inode); 777 return err; 778 } 779 780 const struct inode_operations f2fs_dir_inode_operations = { 781 .create = f2fs_create, 782 .lookup = f2fs_lookup, 783 .link = f2fs_link, 784 .unlink = f2fs_unlink, 785 .symlink = f2fs_symlink, 786 .mkdir = f2fs_mkdir, 787 .rmdir = f2fs_rmdir, 788 .mknod = f2fs_mknod, 789 .rename2 = f2fs_rename2, 790 .tmpfile = f2fs_tmpfile, 791 .getattr = f2fs_getattr, 792 .setattr = f2fs_setattr, 793 .get_acl = f2fs_get_acl, 794 .set_acl = f2fs_set_acl, 795 #ifdef CONFIG_F2FS_FS_XATTR 796 .setxattr = generic_setxattr, 797 .getxattr = generic_getxattr, 798 .listxattr = f2fs_listxattr, 799 .removexattr = generic_removexattr, 800 #endif 801 }; 802 803 const struct inode_operations f2fs_symlink_inode_operations = { 804 .readlink = generic_readlink, 805 .follow_link = f2fs_follow_link, 806 .put_link = page_put_link, 807 .getattr = f2fs_getattr, 808 .setattr = f2fs_setattr, 809 #ifdef CONFIG_F2FS_FS_XATTR 810 .setxattr = generic_setxattr, 811 .getxattr = generic_getxattr, 812 .listxattr = f2fs_listxattr, 813 .removexattr = generic_removexattr, 814 #endif 815 }; 816 817 const struct inode_operations f2fs_special_inode_operations = { 818 .getattr = f2fs_getattr, 819 .setattr = f2fs_setattr, 820 .get_acl = f2fs_get_acl, 821 .set_acl = f2fs_set_acl, 822 #ifdef CONFIG_F2FS_FS_XATTR 823 .setxattr = generic_setxattr, 824 .getxattr = generic_getxattr, 825 .listxattr = f2fs_listxattr, 826 .removexattr = generic_removexattr, 827 #endif 828 }; 829