fs/f2fs/namei.c

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