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 25static 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 68out: 69 clear_nlink(inode); 70 unlock_new_inode(inode); 71fail: 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 80static 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 */ 94static 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 109static 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; 146out: 147 handle_failed_inode(inode); 148 return err; 149} 150 151static 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; 175out: 176 clear_inode_flag(F2FS_I(inode), FI_INC_LINK); 177 iput(inode); 178 f2fs_unlock_op(sbi); 179 return err; 180} 181 182struct 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 191static 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 } 219out: 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 229static 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 263static 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); 294fail: 295 trace_f2fs_unlink_exit(inode, err); 296 return err; 297} 298 299static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd) 300{ 301 struct page *page = page_follow_link_light(dentry, nd); 302 303 if (IS_ERR_OR_NULL(page)) 304 return page; 305 306 /* this is broken symlink case */ 307 if (*nd_get_link(nd) == 0) { 308 page_put_link(dentry, nd, page); 309 return ERR_PTR(-ENOENT); 310 } 311 return page; 312} 313 314static int f2fs_symlink(struct inode *dir, struct dentry *dentry, 315 const char *symname) 316{ 317 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 318 struct inode *inode; 319 size_t symlen = strlen(symname) + 1; 320 int err; 321 322 f2fs_balance_fs(sbi); 323 324 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); 325 if (IS_ERR(inode)) 326 return PTR_ERR(inode); 327 328 inode->i_op = &f2fs_symlink_inode_operations; 329 inode->i_mapping->a_ops = &f2fs_dblock_aops; 330 331 f2fs_lock_op(sbi); 332 err = f2fs_add_link(dentry, inode); 333 if (err) 334 goto out; 335 f2fs_unlock_op(sbi); 336 337 err = page_symlink(inode, symname, symlen); 338 alloc_nid_done(sbi, inode->i_ino); 339 340 d_instantiate(dentry, inode); 341 unlock_new_inode(inode); 342 343 /* 344 * Let's flush symlink data in order to avoid broken symlink as much as 345 * possible. Nevertheless, fsyncing is the best way, but there is no 346 * way to get a file descriptor in order to flush that. 347 * 348 * Note that, it needs to do dir->fsync to make this recoverable. 349 * If the symlink path is stored into inline_data, there is no 350 * performance regression. 351 */ 352 filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); 353 354 if (IS_DIRSYNC(dir)) 355 f2fs_sync_fs(sbi->sb, 1); 356 return err; 357out: 358 handle_failed_inode(inode); 359 return err; 360} 361 362static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 363{ 364 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 365 struct inode *inode; 366 int err; 367 368 f2fs_balance_fs(sbi); 369 370 inode = f2fs_new_inode(dir, S_IFDIR | mode); 371 if (IS_ERR(inode)) 372 return PTR_ERR(inode); 373 374 inode->i_op = &f2fs_dir_inode_operations; 375 inode->i_fop = &f2fs_dir_operations; 376 inode->i_mapping->a_ops = &f2fs_dblock_aops; 377 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); 378 379 set_inode_flag(F2FS_I(inode), FI_INC_LINK); 380 f2fs_lock_op(sbi); 381 err = f2fs_add_link(dentry, inode); 382 if (err) 383 goto out_fail; 384 f2fs_unlock_op(sbi); 385 386 stat_inc_inline_dir(inode); 387 alloc_nid_done(sbi, inode->i_ino); 388 389 d_instantiate(dentry, inode); 390 unlock_new_inode(inode); 391 392 if (IS_DIRSYNC(dir)) 393 f2fs_sync_fs(sbi->sb, 1); 394 return 0; 395 396out_fail: 397 clear_inode_flag(F2FS_I(inode), FI_INC_LINK); 398 handle_failed_inode(inode); 399 return err; 400} 401 402static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) 403{ 404 struct inode *inode = d_inode(dentry); 405 if (f2fs_empty_dir(inode)) 406 return f2fs_unlink(dir, dentry); 407 return -ENOTEMPTY; 408} 409 410static int f2fs_mknod(struct inode *dir, struct dentry *dentry, 411 umode_t mode, dev_t rdev) 412{ 413 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 414 struct inode *inode; 415 int err = 0; 416 417 if (!new_valid_dev(rdev)) 418 return -EINVAL; 419 420 f2fs_balance_fs(sbi); 421 422 inode = f2fs_new_inode(dir, mode); 423 if (IS_ERR(inode)) 424 return PTR_ERR(inode); 425 426 init_special_inode(inode, inode->i_mode, rdev); 427 inode->i_op = &f2fs_special_inode_operations; 428 429 f2fs_lock_op(sbi); 430 err = f2fs_add_link(dentry, inode); 431 if (err) 432 goto out; 433 f2fs_unlock_op(sbi); 434 435 alloc_nid_done(sbi, inode->i_ino); 436 437 d_instantiate(dentry, inode); 438 unlock_new_inode(inode); 439 440 if (IS_DIRSYNC(dir)) 441 f2fs_sync_fs(sbi->sb, 1); 442 return 0; 443out: 444 handle_failed_inode(inode); 445 return err; 446} 447 448static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, 449 struct inode *new_dir, struct dentry *new_dentry) 450{ 451 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); 452 struct inode *old_inode = d_inode(old_dentry); 453 struct inode *new_inode = d_inode(new_dentry); 454 struct page *old_dir_page; 455 struct page *old_page, *new_page; 456 struct f2fs_dir_entry *old_dir_entry = NULL; 457 struct f2fs_dir_entry *old_entry; 458 struct f2fs_dir_entry *new_entry; 459 int err = -ENOENT; 460 461 f2fs_balance_fs(sbi); 462 463 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); 464 if (!old_entry) 465 goto out; 466 467 if (S_ISDIR(old_inode->i_mode)) { 468 err = -EIO; 469 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); 470 if (!old_dir_entry) 471 goto out_old; 472 } 473 474 if (new_inode) { 475 476 err = -ENOTEMPTY; 477 if (old_dir_entry && !f2fs_empty_dir(new_inode)) 478 goto out_dir; 479 480 err = -ENOENT; 481 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, 482 &new_page); 483 if (!new_entry) 484 goto out_dir; 485 486 f2fs_lock_op(sbi); 487 488 err = acquire_orphan_inode(sbi); 489 if (err) 490 goto put_out_dir; 491 492 if (update_dent_inode(old_inode, &new_dentry->d_name)) { 493 release_orphan_inode(sbi); 494 goto put_out_dir; 495 } 496 497 f2fs_set_link(new_dir, new_entry, new_page, old_inode); 498 499 new_inode->i_ctime = CURRENT_TIME; 500 down_write(&F2FS_I(new_inode)->i_sem); 501 if (old_dir_entry) 502 drop_nlink(new_inode); 503 drop_nlink(new_inode); 504 up_write(&F2FS_I(new_inode)->i_sem); 505 506 mark_inode_dirty(new_inode); 507 508 if (!new_inode->i_nlink) 509 add_orphan_inode(sbi, new_inode->i_ino); 510 else 511 release_orphan_inode(sbi); 512 513 update_inode_page(old_inode); 514 update_inode_page(new_inode); 515 } else { 516 f2fs_lock_op(sbi); 517 518 err = f2fs_add_link(new_dentry, old_inode); 519 if (err) { 520 f2fs_unlock_op(sbi); 521 goto out_dir; 522 } 523 524 if (old_dir_entry) { 525 inc_nlink(new_dir); 526 update_inode_page(new_dir); 527 } 528 } 529 530 down_write(&F2FS_I(old_inode)->i_sem); 531 file_lost_pino(old_inode); 532 up_write(&F2FS_I(old_inode)->i_sem); 533 534 old_inode->i_ctime = CURRENT_TIME; 535 mark_inode_dirty(old_inode); 536 537 f2fs_delete_entry(old_entry, old_page, old_dir, NULL); 538 539 if (old_dir_entry) { 540 if (old_dir != new_dir) { 541 f2fs_set_link(old_inode, old_dir_entry, 542 old_dir_page, new_dir); 543 update_inode_page(old_inode); 544 } else { 545 f2fs_dentry_kunmap(old_inode, old_dir_page); 546 f2fs_put_page(old_dir_page, 0); 547 } 548 drop_nlink(old_dir); 549 mark_inode_dirty(old_dir); 550 update_inode_page(old_dir); 551 } 552 553 f2fs_unlock_op(sbi); 554 555 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) 556 f2fs_sync_fs(sbi->sb, 1); 557 return 0; 558 559put_out_dir: 560 f2fs_unlock_op(sbi); 561 f2fs_dentry_kunmap(new_dir, new_page); 562 f2fs_put_page(new_page, 0); 563out_dir: 564 if (old_dir_entry) { 565 f2fs_dentry_kunmap(old_inode, old_dir_page); 566 f2fs_put_page(old_dir_page, 0); 567 } 568out_old: 569 f2fs_dentry_kunmap(old_dir, old_page); 570 f2fs_put_page(old_page, 0); 571out: 572 return err; 573} 574 575static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, 576 struct inode *new_dir, struct dentry *new_dentry) 577{ 578 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); 579 struct inode *old_inode = d_inode(old_dentry); 580 struct inode *new_inode = d_inode(new_dentry); 581 struct page *old_dir_page, *new_dir_page; 582 struct page *old_page, *new_page; 583 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; 584 struct f2fs_dir_entry *old_entry, *new_entry; 585 int old_nlink = 0, new_nlink = 0; 586 int err = -ENOENT; 587 588 f2fs_balance_fs(sbi); 589 590 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); 591 if (!old_entry) 592 goto out; 593 594 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); 595 if (!new_entry) 596 goto out_old; 597 598 /* prepare for updating ".." directory entry info later */ 599 if (old_dir != new_dir) { 600 if (S_ISDIR(old_inode->i_mode)) { 601 err = -EIO; 602 old_dir_entry = f2fs_parent_dir(old_inode, 603 &old_dir_page); 604 if (!old_dir_entry) 605 goto out_new; 606 } 607 608 if (S_ISDIR(new_inode->i_mode)) { 609 err = -EIO; 610 new_dir_entry = f2fs_parent_dir(new_inode, 611 &new_dir_page); 612 if (!new_dir_entry) 613 goto out_old_dir; 614 } 615 } 616 617 /* 618 * If cross rename between file and directory those are not 619 * in the same directory, we will inc nlink of file's parent 620 * later, so we should check upper boundary of its nlink. 621 */ 622 if ((!old_dir_entry || !new_dir_entry) && 623 old_dir_entry != new_dir_entry) { 624 old_nlink = old_dir_entry ? -1 : 1; 625 new_nlink = -old_nlink; 626 err = -EMLINK; 627 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || 628 (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) 629 goto out_new_dir; 630 } 631 632 f2fs_lock_op(sbi); 633 634 err = update_dent_inode(old_inode, &new_dentry->d_name); 635 if (err) 636 goto out_unlock; 637 638 err = update_dent_inode(new_inode, &old_dentry->d_name); 639 if (err) 640 goto out_undo; 641 642 /* update ".." directory entry info of old dentry */ 643 if (old_dir_entry) 644 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); 645 646 /* update ".." directory entry info of new dentry */ 647 if (new_dir_entry) 648 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); 649 650 /* update directory entry info of old dir inode */ 651 f2fs_set_link(old_dir, old_entry, old_page, new_inode); 652 653 down_write(&F2FS_I(old_inode)->i_sem); 654 file_lost_pino(old_inode); 655 up_write(&F2FS_I(old_inode)->i_sem); 656 657 update_inode_page(old_inode); 658 659 old_dir->i_ctime = CURRENT_TIME; 660 if (old_nlink) { 661 down_write(&F2FS_I(old_dir)->i_sem); 662 if (old_nlink < 0) 663 drop_nlink(old_dir); 664 else 665 inc_nlink(old_dir); 666 up_write(&F2FS_I(old_dir)->i_sem); 667 } 668 mark_inode_dirty(old_dir); 669 update_inode_page(old_dir); 670 671 /* update directory entry info of new dir inode */ 672 f2fs_set_link(new_dir, new_entry, new_page, old_inode); 673 674 down_write(&F2FS_I(new_inode)->i_sem); 675 file_lost_pino(new_inode); 676 up_write(&F2FS_I(new_inode)->i_sem); 677 678 update_inode_page(new_inode); 679 680 new_dir->i_ctime = CURRENT_TIME; 681 if (new_nlink) { 682 down_write(&F2FS_I(new_dir)->i_sem); 683 if (new_nlink < 0) 684 drop_nlink(new_dir); 685 else 686 inc_nlink(new_dir); 687 up_write(&F2FS_I(new_dir)->i_sem); 688 } 689 mark_inode_dirty(new_dir); 690 update_inode_page(new_dir); 691 692 f2fs_unlock_op(sbi); 693 694 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) 695 f2fs_sync_fs(sbi->sb, 1); 696 return 0; 697out_undo: 698 /* Still we may fail to recover name info of f2fs_inode here */ 699 update_dent_inode(old_inode, &old_dentry->d_name); 700out_unlock: 701 f2fs_unlock_op(sbi); 702out_new_dir: 703 if (new_dir_entry) { 704 f2fs_dentry_kunmap(new_inode, new_dir_page); 705 f2fs_put_page(new_dir_page, 0); 706 } 707out_old_dir: 708 if (old_dir_entry) { 709 f2fs_dentry_kunmap(old_inode, old_dir_page); 710 f2fs_put_page(old_dir_page, 0); 711 } 712out_new: 713 f2fs_dentry_kunmap(new_dir, new_page); 714 f2fs_put_page(new_page, 0); 715out_old: 716 f2fs_dentry_kunmap(old_dir, old_page); 717 f2fs_put_page(old_page, 0); 718out: 719 return err; 720} 721 722static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, 723 struct inode *new_dir, struct dentry *new_dentry, 724 unsigned int flags) 725{ 726 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) 727 return -EINVAL; 728 729 if (flags & RENAME_EXCHANGE) { 730 return f2fs_cross_rename(old_dir, old_dentry, 731 new_dir, new_dentry); 732 } 733 /* 734 * VFS has already handled the new dentry existence case, 735 * here, we just deal with "RENAME_NOREPLACE" as regular rename. 736 */ 737 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); 738} 739 740static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) 741{ 742 struct f2fs_sb_info *sbi = F2FS_I_SB(dir); 743 struct inode *inode; 744 int err; 745 746 inode = f2fs_new_inode(dir, mode); 747 if (IS_ERR(inode)) 748 return PTR_ERR(inode); 749 750 inode->i_op = &f2fs_file_inode_operations; 751 inode->i_fop = &f2fs_file_operations; 752 inode->i_mapping->a_ops = &f2fs_dblock_aops; 753 754 f2fs_lock_op(sbi); 755 err = acquire_orphan_inode(sbi); 756 if (err) 757 goto out; 758 759 err = f2fs_do_tmpfile(inode, dir); 760 if (err) 761 goto release_out; 762 763 /* 764 * add this non-linked tmpfile to orphan list, in this way we could 765 * remove all unused data of tmpfile after abnormal power-off. 766 */ 767 add_orphan_inode(sbi, inode->i_ino); 768 f2fs_unlock_op(sbi); 769 770 alloc_nid_done(sbi, inode->i_ino); 771 772 stat_inc_inline_inode(inode); 773 d_tmpfile(dentry, inode); 774 unlock_new_inode(inode); 775 return 0; 776 777release_out: 778 release_orphan_inode(sbi); 779out: 780 handle_failed_inode(inode); 781 return err; 782} 783 784const struct inode_operations f2fs_dir_inode_operations = { 785 .create = f2fs_create, 786 .lookup = f2fs_lookup, 787 .link = f2fs_link, 788 .unlink = f2fs_unlink, 789 .symlink = f2fs_symlink, 790 .mkdir = f2fs_mkdir, 791 .rmdir = f2fs_rmdir, 792 .mknod = f2fs_mknod, 793 .rename2 = f2fs_rename2, 794 .tmpfile = f2fs_tmpfile, 795 .getattr = f2fs_getattr, 796 .setattr = f2fs_setattr, 797 .get_acl = f2fs_get_acl, 798 .set_acl = f2fs_set_acl, 799#ifdef CONFIG_F2FS_FS_XATTR 800 .setxattr = generic_setxattr, 801 .getxattr = generic_getxattr, 802 .listxattr = f2fs_listxattr, 803 .removexattr = generic_removexattr, 804#endif 805}; 806 807const struct inode_operations f2fs_symlink_inode_operations = { 808 .readlink = generic_readlink, 809 .follow_link = f2fs_follow_link, 810 .put_link = page_put_link, 811 .getattr = f2fs_getattr, 812 .setattr = f2fs_setattr, 813#ifdef CONFIG_F2FS_FS_XATTR 814 .setxattr = generic_setxattr, 815 .getxattr = generic_getxattr, 816 .listxattr = f2fs_listxattr, 817 .removexattr = generic_removexattr, 818#endif 819}; 820 821const struct inode_operations f2fs_special_inode_operations = { 822 .getattr = f2fs_getattr, 823 .setattr = f2fs_setattr, 824 .get_acl = f2fs_get_acl, 825 .set_acl = f2fs_set_acl, 826#ifdef CONFIG_F2FS_FS_XATTR 827 .setxattr = generic_setxattr, 828 .getxattr = generic_getxattr, 829 .listxattr = f2fs_listxattr, 830 .removexattr = generic_removexattr, 831#endif 832}; 833