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 int __recover_dot_dentries(struct inode *dir, nid_t pino)
 191 {
 192         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 193         struct qstr dot = QSTR_INIT(".", 1);
 194         struct qstr dotdot = QSTR_INIT("..", 2);
 195         struct f2fs_dir_entry *de;
 196         struct page *page;
 197         int err = 0;
 198
 199         f2fs_lock_op(sbi);
 200
 201         de = f2fs_find_entry(dir, &dot, &page);
 202         if (de) {
 203                 f2fs_dentry_kunmap(dir, page);
 204                 f2fs_put_page(page, 0);
 205         } else {
 206                 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
 207                 if (err)
 208                         goto out;
 209         }
 210
 211         de = f2fs_find_entry(dir, &dotdot, &page);
 212         if (de) {
 213                 f2fs_dentry_kunmap(dir, page);
 214                 f2fs_put_page(page, 0);
 215         } else {
 216                 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
 217         }
 218 out:
 219         if (!err) {
 220                 clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS);
 221                 mark_inode_dirty(dir);
 222         }
 223
 224         f2fs_unlock_op(sbi);
 225         return err;
 226 }
 227
 228 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 229                 unsigned int flags)
 230 {
 231         struct inode *inode = NULL;
 232         struct f2fs_dir_entry *de;
 233         struct page *page;
 234
 235         if (dentry->d_name.len > F2FS_NAME_LEN)
 236                 return ERR_PTR(-ENAMETOOLONG);
 237
 238         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 239         if (de) {
 240                 nid_t ino = le32_to_cpu(de->ino);
 241                 f2fs_dentry_kunmap(dir, page);
 242                 f2fs_put_page(page, 0);
 243
 244                 inode = f2fs_iget(dir->i_sb, ino);
 245                 if (IS_ERR(inode))
 246                         return ERR_CAST(inode);
 247
 248                 if (f2fs_has_inline_dots(inode)) {
 249                         int err;
 250
 251                         err = __recover_dot_dentries(inode, dir->i_ino);
 252                         if (err) {
 253                                 iget_failed(inode);
 254                                 return ERR_PTR(err);
 255                         }
 256                 }
 257         }
 258
 259         return d_splice_alias(inode, dentry);
 260 }
 261
 262 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 263 {
 264         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 265         struct inode *inode = dentry->d_inode;
 266         struct f2fs_dir_entry *de;
 267         struct page *page;
 268         int err = -ENOENT;
 269
 270         trace_f2fs_unlink_enter(dir, dentry);
 271         f2fs_balance_fs(sbi);
 272
 273         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 274         if (!de)
 275                 goto fail;
 276
 277         f2fs_lock_op(sbi);
 278         err = acquire_orphan_inode(sbi);
 279         if (err) {
 280                 f2fs_unlock_op(sbi);
 281                 f2fs_dentry_kunmap(dir, page);
 282                 f2fs_put_page(page, 0);
 283                 goto fail;
 284         }
 285         f2fs_delete_entry(de, page, dir, inode);
 286         f2fs_unlock_op(sbi);
 287
 288         /* In order to evict this inode, we set it dirty */
 289         mark_inode_dirty(inode);
 290
 291         if (IS_DIRSYNC(dir))
 292                 f2fs_sync_fs(sbi->sb, 1);
 293 fail:
 294         trace_f2fs_unlink_exit(inode, err);
 295         return err;
 296 }
 297
 298 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 299                                         const char *symname)
 300 {
 301         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 302         struct inode *inode;
 303         size_t symlen = strlen(symname) + 1;
 304         int err;
 305
 306         f2fs_balance_fs(sbi);
 307
 308         inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
 309         if (IS_ERR(inode))
 310                 return PTR_ERR(inode);
 311
 312         inode->i_op = &f2fs_symlink_inode_operations;
 313         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 314
 315         f2fs_lock_op(sbi);
 316         err = f2fs_add_link(dentry, inode);
 317         if (err)
 318                 goto out;
 319         f2fs_unlock_op(sbi);
 320
 321         err = page_symlink(inode, symname, symlen);
 322         alloc_nid_done(sbi, inode->i_ino);
 323
 324         d_instantiate(dentry, inode);
 325         unlock_new_inode(inode);
 326
 327         if (IS_DIRSYNC(dir))
 328                 f2fs_sync_fs(sbi->sb, 1);
 329         return err;
 330 out:
 331         handle_failed_inode(inode);
 332         return err;
 333 }
 334
 335 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 336 {
 337         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 338         struct inode *inode;
 339         int err;
 340
 341         f2fs_balance_fs(sbi);
 342
 343         inode = f2fs_new_inode(dir, S_IFDIR | mode);
 344         if (IS_ERR(inode))
 345                 return PTR_ERR(inode);
 346
 347         inode->i_op = &f2fs_dir_inode_operations;
 348         inode->i_fop = &f2fs_dir_operations;
 349         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 350         mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
 351
 352         set_inode_flag(F2FS_I(inode), FI_INC_LINK);
 353         f2fs_lock_op(sbi);
 354         err = f2fs_add_link(dentry, inode);
 355         if (err)
 356                 goto out_fail;
 357         f2fs_unlock_op(sbi);
 358
 359         stat_inc_inline_dir(inode);
 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
 369 out_fail:
 370         clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
 371         handle_failed_inode(inode);
 372         return err;
 373 }
 374
 375 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 376 {
 377         struct inode *inode = dentry->d_inode;
 378         if (f2fs_empty_dir(inode))
 379                 return f2fs_unlink(dir, dentry);
 380         return -ENOTEMPTY;
 381 }
 382
 383 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
 384                                 umode_t mode, dev_t rdev)
 385 {
 386         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 387         struct inode *inode;
 388         int err = 0;
 389
 390         if (!new_valid_dev(rdev))
 391                 return -EINVAL;
 392
 393         f2fs_balance_fs(sbi);
 394
 395         inode = f2fs_new_inode(dir, mode);
 396         if (IS_ERR(inode))
 397                 return PTR_ERR(inode);
 398
 399         init_special_inode(inode, inode->i_mode, rdev);
 400         inode->i_op = &f2fs_special_inode_operations;
 401
 402         f2fs_lock_op(sbi);
 403         err = f2fs_add_link(dentry, inode);
 404         if (err)
 405                 goto out;
 406         f2fs_unlock_op(sbi);
 407
 408         alloc_nid_done(sbi, inode->i_ino);
 409
 410         d_instantiate(dentry, inode);
 411         unlock_new_inode(inode);
 412
 413         if (IS_DIRSYNC(dir))
 414                 f2fs_sync_fs(sbi->sb, 1);
 415         return 0;
 416 out:
 417         handle_failed_inode(inode);
 418         return err;
 419 }
 420
 421 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 422                         struct inode *new_dir, struct dentry *new_dentry)
 423 {
 424         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 425         struct inode *old_inode = old_dentry->d_inode;
 426         struct inode *new_inode = new_dentry->d_inode;
 427         struct page *old_dir_page;
 428         struct page *old_page, *new_page;
 429         struct f2fs_dir_entry *old_dir_entry = NULL;
 430         struct f2fs_dir_entry *old_entry;
 431         struct f2fs_dir_entry *new_entry;
 432         int err = -ENOENT;
 433
 434         f2fs_balance_fs(sbi);
 435
 436         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 437         if (!old_entry)
 438                 goto out;
 439
 440         if (S_ISDIR(old_inode->i_mode)) {
 441                 err = -EIO;
 442                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
 443                 if (!old_dir_entry)
 444                         goto out_old;
 445         }
 446
 447         if (new_inode) {
 448
 449                 err = -ENOTEMPTY;
 450                 if (old_dir_entry && !f2fs_empty_dir(new_inode))
 451                         goto out_dir;
 452
 453                 err = -ENOENT;
 454                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
 455                                                 &new_page);
 456                 if (!new_entry)
 457                         goto out_dir;
 458
 459                 f2fs_lock_op(sbi);
 460
 461                 err = acquire_orphan_inode(sbi);
 462                 if (err)
 463                         goto put_out_dir;
 464
 465                 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
 466                         release_orphan_inode(sbi);
 467                         goto put_out_dir;
 468                 }
 469
 470                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
 471
 472                 new_inode->i_ctime = CURRENT_TIME;
 473                 down_write(&F2FS_I(new_inode)->i_sem);
 474                 if (old_dir_entry)
 475                         drop_nlink(new_inode);
 476                 drop_nlink(new_inode);
 477                 up_write(&F2FS_I(new_inode)->i_sem);
 478
 479                 mark_inode_dirty(new_inode);
 480
 481                 if (!new_inode->i_nlink)
 482                         add_orphan_inode(sbi, new_inode->i_ino);
 483                 else
 484                         release_orphan_inode(sbi);
 485
 486                 update_inode_page(old_inode);
 487                 update_inode_page(new_inode);
 488         } else {
 489                 f2fs_lock_op(sbi);
 490
 491                 err = f2fs_add_link(new_dentry, old_inode);
 492                 if (err) {
 493                         f2fs_unlock_op(sbi);
 494                         goto out_dir;
 495                 }
 496
 497                 if (old_dir_entry) {
 498                         inc_nlink(new_dir);
 499                         update_inode_page(new_dir);
 500                 }
 501         }
 502
 503         down_write(&F2FS_I(old_inode)->i_sem);
 504         file_lost_pino(old_inode);
 505         up_write(&F2FS_I(old_inode)->i_sem);
 506
 507         old_inode->i_ctime = CURRENT_TIME;
 508         mark_inode_dirty(old_inode);
 509
 510         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
 511
 512         if (old_dir_entry) {
 513                 if (old_dir != new_dir) {
 514                         f2fs_set_link(old_inode, old_dir_entry,
 515                                                 old_dir_page, new_dir);
 516                         update_inode_page(old_inode);
 517                 } else {
 518                         f2fs_dentry_kunmap(old_inode, old_dir_page);
 519                         f2fs_put_page(old_dir_page, 0);
 520                 }
 521                 drop_nlink(old_dir);
 522                 mark_inode_dirty(old_dir);
 523                 update_inode_page(old_dir);
 524         }
 525
 526         f2fs_unlock_op(sbi);
 527
 528         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 529                 f2fs_sync_fs(sbi->sb, 1);
 530         return 0;
 531
 532 put_out_dir:
 533         f2fs_unlock_op(sbi);
 534         f2fs_dentry_kunmap(new_dir, new_page);
 535         f2fs_put_page(new_page, 0);
 536 out_dir:
 537         if (old_dir_entry) {
 538                 f2fs_dentry_kunmap(old_inode, old_dir_page);
 539                 f2fs_put_page(old_dir_page, 0);
 540         }
 541 out_old:
 542         f2fs_dentry_kunmap(old_dir, old_page);
 543         f2fs_put_page(old_page, 0);
 544 out:
 545         return err;
 546 }
 547
 548 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 549                              struct inode *new_dir, struct dentry *new_dentry)
 550 {
 551         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 552         struct inode *old_inode = old_dentry->d_inode;
 553         struct inode *new_inode = new_dentry->d_inode;
 554         struct page *old_dir_page, *new_dir_page;
 555         struct page *old_page, *new_page;
 556         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
 557         struct f2fs_dir_entry *old_entry, *new_entry;
 558         int old_nlink = 0, new_nlink = 0;
 559         int err = -ENOENT;
 560
 561         f2fs_balance_fs(sbi);
 562
 563         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 564         if (!old_entry)
 565                 goto out;
 566
 567         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
 568         if (!new_entry)
 569                 goto out_old;
 570
 571         /* prepare for updating ".." directory entry info later */
 572         if (old_dir != new_dir) {
 573                 if (S_ISDIR(old_inode->i_mode)) {
 574                         err = -EIO;
 575                         old_dir_entry = f2fs_parent_dir(old_inode,
 576                                                         &old_dir_page);
 577                         if (!old_dir_entry)
 578                                 goto out_new;
 579                 }
 580
 581                 if (S_ISDIR(new_inode->i_mode)) {
 582                         err = -EIO;
 583                         new_dir_entry = f2fs_parent_dir(new_inode,
 584                                                         &new_dir_page);
 585                         if (!new_dir_entry)
 586                                 goto out_old_dir;
 587                 }
 588         }
 589
 590         /*
 591          * If cross rename between file and directory those are not
 592          * in the same directory, we will inc nlink of file's parent
 593          * later, so we should check upper boundary of its nlink.
 594          */
 595         if ((!old_dir_entry || !new_dir_entry) &&
 596                                 old_dir_entry != new_dir_entry) {
 597                 old_nlink = old_dir_entry ? -1 : 1;
 598                 new_nlink = -old_nlink;
 599                 err = -EMLINK;
 600                 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
 601                         (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
 602                         goto out_new_dir;
 603         }
 604
 605         f2fs_lock_op(sbi);
 606
 607         err = update_dent_inode(old_inode, &new_dentry->d_name);
 608         if (err)
 609                 goto out_unlock;
 610
 611         err = update_dent_inode(new_inode, &old_dentry->d_name);
 612         if (err)
 613                 goto out_undo;
 614
 615         /* update ".." directory entry info of old dentry */
 616         if (old_dir_entry)
 617                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
 618
 619         /* update ".." directory entry info of new dentry */
 620         if (new_dir_entry)
 621                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
 622
 623         /* update directory entry info of old dir inode */
 624         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
 625
 626         down_write(&F2FS_I(old_inode)->i_sem);
 627         file_lost_pino(old_inode);
 628         up_write(&F2FS_I(old_inode)->i_sem);
 629
 630         update_inode_page(old_inode);
 631
 632         old_dir->i_ctime = CURRENT_TIME;
 633         if (old_nlink) {
 634                 down_write(&F2FS_I(old_dir)->i_sem);
 635                 if (old_nlink < 0)
 636                         drop_nlink(old_dir);
 637                 else
 638                         inc_nlink(old_dir);
 639                 up_write(&F2FS_I(old_dir)->i_sem);
 640         }
 641         mark_inode_dirty(old_dir);
 642         update_inode_page(old_dir);
 643
 644         /* update directory entry info of new dir inode */
 645         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
 646
 647         down_write(&F2FS_I(new_inode)->i_sem);
 648         file_lost_pino(new_inode);
 649         up_write(&F2FS_I(new_inode)->i_sem);
 650
 651         update_inode_page(new_inode);
 652
 653         new_dir->i_ctime = CURRENT_TIME;
 654         if (new_nlink) {
 655                 down_write(&F2FS_I(new_dir)->i_sem);
 656                 if (new_nlink < 0)
 657                         drop_nlink(new_dir);
 658                 else
 659                         inc_nlink(new_dir);
 660                 up_write(&F2FS_I(new_dir)->i_sem);
 661         }
 662         mark_inode_dirty(new_dir);
 663         update_inode_page(new_dir);
 664
 665         f2fs_unlock_op(sbi);
 666
 667         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 668                 f2fs_sync_fs(sbi->sb, 1);
 669         return 0;
 670 out_undo:
 671         /* Still we may fail to recover name info of f2fs_inode here */
 672         update_dent_inode(old_inode, &old_dentry->d_name);
 673 out_unlock:
 674         f2fs_unlock_op(sbi);
 675 out_new_dir:
 676         if (new_dir_entry) {
 677                 f2fs_dentry_kunmap(new_inode, new_dir_page);
 678                 f2fs_put_page(new_dir_page, 0);
 679         }
 680 out_old_dir:
 681         if (old_dir_entry) {
 682                 f2fs_dentry_kunmap(old_inode, old_dir_page);
 683                 f2fs_put_page(old_dir_page, 0);
 684         }
 685 out_new:
 686         f2fs_dentry_kunmap(new_dir, new_page);
 687         f2fs_put_page(new_page, 0);
 688 out_old:
 689         f2fs_dentry_kunmap(old_dir, old_page);
 690         f2fs_put_page(old_page, 0);
 691 out:
 692         return err;
 693 }
 694
 695 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
 696                         struct inode *new_dir, struct dentry *new_dentry,
 697                         unsigned int flags)
 698 {
 699         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
 700                 return -EINVAL;
 701
 702         if (flags & RENAME_EXCHANGE) {
 703                 return f2fs_cross_rename(old_dir, old_dentry,
 704                                          new_dir, new_dentry);
 705         }
 706         /*
 707          * VFS has already handled the new dentry existence case,
 708          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
 709          */
 710         return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
 711 }
 712
 713 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
 714 {
 715         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 716         struct inode *inode;
 717         int err;
 718
 719         inode = f2fs_new_inode(dir, mode);
 720         if (IS_ERR(inode))
 721                 return PTR_ERR(inode);
 722
 723         inode->i_op = &f2fs_file_inode_operations;
 724         inode->i_fop = &f2fs_file_operations;
 725         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 726
 727         f2fs_lock_op(sbi);
 728         err = acquire_orphan_inode(sbi);
 729         if (err)
 730                 goto out;
 731
 732         err = f2fs_do_tmpfile(inode, dir);
 733         if (err)
 734                 goto release_out;
 735
 736         /*
 737          * add this non-linked tmpfile to orphan list, in this way we could
 738          * remove all unused data of tmpfile after abnormal power-off.
 739          */
 740         add_orphan_inode(sbi, inode->i_ino);
 741         f2fs_unlock_op(sbi);
 742
 743         alloc_nid_done(sbi, inode->i_ino);
 744
 745         stat_inc_inline_inode(inode);
 746         d_tmpfile(dentry, inode);
 747         unlock_new_inode(inode);
 748         return 0;
 749
 750 release_out:
 751         release_orphan_inode(sbi);
 752 out:
 753         handle_failed_inode(inode);
 754         return err;
 755 }
 756
 757 const struct inode_operations f2fs_dir_inode_operations = {
 758         .create         = f2fs_create,
 759         .lookup         = f2fs_lookup,
 760         .link           = f2fs_link,
 761         .unlink         = f2fs_unlink,
 762         .symlink        = f2fs_symlink,
 763         .mkdir          = f2fs_mkdir,
 764         .rmdir          = f2fs_rmdir,
 765         .mknod          = f2fs_mknod,
 766         .rename2        = f2fs_rename2,
 767         .tmpfile        = f2fs_tmpfile,
 768         .getattr        = f2fs_getattr,
 769         .setattr        = f2fs_setattr,
 770         .get_acl        = f2fs_get_acl,
 771         .set_acl        = f2fs_set_acl,
 772 #ifdef CONFIG_F2FS_FS_XATTR
 773         .setxattr       = generic_setxattr,
 774         .getxattr       = generic_getxattr,
 775         .listxattr      = f2fs_listxattr,
 776         .removexattr    = generic_removexattr,
 777 #endif
 778 };
 779
 780 const struct inode_operations f2fs_symlink_inode_operations = {
 781         .readlink       = generic_readlink,
 782         .follow_link    = page_follow_link_light,
 783         .put_link       = page_put_link,
 784         .getattr        = f2fs_getattr,
 785         .setattr        = f2fs_setattr,
 786 #ifdef CONFIG_F2FS_FS_XATTR
 787         .setxattr       = generic_setxattr,
 788         .getxattr       = generic_getxattr,
 789         .listxattr      = f2fs_listxattr,
 790         .removexattr    = generic_removexattr,
 791 #endif
 792 };
 793
 794 const struct inode_operations f2fs_special_inode_operations = {
 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 };