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 #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 = old_dentry->d_inode;
 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(child->d_inode, &dotdot);
 186         if (!ino)
 187                 return ERR_PTR(-ENOENT);
 188         return d_obtain_alias(f2fs_iget(child->d_inode->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 = dentry->d_inode;
 267         struct f2fs_dir_entry *de;
 268         struct page *page;
 269         int err = -ENOENT;
 270
 271         trace_f2fs_unlink_enter(dir, dentry);
 272         f2fs_balance_fs(sbi);
 273
 274         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 275         if (!de)
 276                 goto fail;
 277
 278         f2fs_lock_op(sbi);
 279         err = acquire_orphan_inode(sbi);
 280         if (err) {
 281                 f2fs_unlock_op(sbi);
 282                 f2fs_dentry_kunmap(dir, page);
 283                 f2fs_put_page(page, 0);
 284                 goto fail;
 285         }
 286         f2fs_delete_entry(de, page, dir, inode);
 287         f2fs_unlock_op(sbi);
 288
 289         /* In order to evict this inode, we set it dirty */
 290         mark_inode_dirty(inode);
 291
 292         if (IS_DIRSYNC(dir))
 293                 f2fs_sync_fs(sbi->sb, 1);
 294 fail:
 295         trace_f2fs_unlink_exit(inode, err);
 296         return err;
 297 }
 298
 299 static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd)
 300 {
 301         struct page *page;
 302
 303         page = page_follow_link_light(dentry, nd);
 304         if (IS_ERR(page))
 305                 return page;
 306
 307         /* this is broken symlink case */
 308         if (*nd_get_link(nd) == 0) {
 309                 kunmap(page);
 310                 page_cache_release(page);
 311                 return ERR_PTR(-ENOENT);
 312         }
 313         return page;
 314 }
 315
 316 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 317                                         const char *symname)
 318 {
 319         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 320         struct inode *inode;
 321         size_t symlen = strlen(symname) + 1;
 322         int err;
 323
 324         f2fs_balance_fs(sbi);
 325
 326         inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
 327         if (IS_ERR(inode))
 328                 return PTR_ERR(inode);
 329
 330         inode->i_op = &f2fs_symlink_inode_operations;
 331         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 332
 333         f2fs_lock_op(sbi);
 334         err = f2fs_add_link(dentry, inode);
 335         if (err)
 336                 goto out;
 337         f2fs_unlock_op(sbi);
 338
 339         err = page_symlink(inode, symname, symlen);
 340         alloc_nid_done(sbi, inode->i_ino);
 341
 342         d_instantiate(dentry, inode);
 343         unlock_new_inode(inode);
 344
 345         /*
 346          * Let's flush symlink data in order to avoid broken symlink as much as
 347          * possible. Nevertheless, fsyncing is the best way, but there is no
 348          * way to get a file descriptor in order to flush that.
 349          *
 350          * Note that, it needs to do dir->fsync to make this recoverable.
 351          * If the symlink path is stored into inline_data, there is no
 352          * performance regression.
 353          */
 354         filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1);
 355
 356         if (IS_DIRSYNC(dir))
 357                 f2fs_sync_fs(sbi->sb, 1);
 358         return err;
 359 out:
 360         handle_failed_inode(inode);
 361         return err;
 362 }
 363
 364 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 365 {
 366         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 367         struct inode *inode;
 368         int err;
 369
 370         f2fs_balance_fs(sbi);
 371
 372         inode = f2fs_new_inode(dir, S_IFDIR | mode);
 373         if (IS_ERR(inode))
 374                 return PTR_ERR(inode);
 375
 376         inode->i_op = &f2fs_dir_inode_operations;
 377         inode->i_fop = &f2fs_dir_operations;
 378         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 379         mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
 380
 381         set_inode_flag(F2FS_I(inode), FI_INC_LINK);
 382         f2fs_lock_op(sbi);
 383         err = f2fs_add_link(dentry, inode);
 384         if (err)
 385                 goto out_fail;
 386         f2fs_unlock_op(sbi);
 387
 388         stat_inc_inline_dir(inode);
 389         alloc_nid_done(sbi, inode->i_ino);
 390
 391         d_instantiate(dentry, inode);
 392         unlock_new_inode(inode);
 393
 394         if (IS_DIRSYNC(dir))
 395                 f2fs_sync_fs(sbi->sb, 1);
 396         return 0;
 397
 398 out_fail:
 399         clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
 400         handle_failed_inode(inode);
 401         return err;
 402 }
 403
 404 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 405 {
 406         struct inode *inode = dentry->d_inode;
 407         if (f2fs_empty_dir(inode))
 408                 return f2fs_unlink(dir, dentry);
 409         return -ENOTEMPTY;
 410 }
 411
 412 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
 413                                 umode_t mode, dev_t rdev)
 414 {
 415         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 416         struct inode *inode;
 417         int err = 0;
 418
 419         if (!new_valid_dev(rdev))
 420                 return -EINVAL;
 421
 422         f2fs_balance_fs(sbi);
 423
 424         inode = f2fs_new_inode(dir, mode);
 425         if (IS_ERR(inode))
 426                 return PTR_ERR(inode);
 427
 428         init_special_inode(inode, inode->i_mode, rdev);
 429         inode->i_op = &f2fs_special_inode_operations;
 430
 431         f2fs_lock_op(sbi);
 432         err = f2fs_add_link(dentry, inode);
 433         if (err)
 434                 goto out;
 435         f2fs_unlock_op(sbi);
 436
 437         alloc_nid_done(sbi, inode->i_ino);
 438
 439         d_instantiate(dentry, inode);
 440         unlock_new_inode(inode);
 441
 442         if (IS_DIRSYNC(dir))
 443                 f2fs_sync_fs(sbi->sb, 1);
 444         return 0;
 445 out:
 446         handle_failed_inode(inode);
 447         return err;
 448 }
 449
 450 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 451                         struct inode *new_dir, struct dentry *new_dentry)
 452 {
 453         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 454         struct inode *old_inode = old_dentry->d_inode;
 455         struct inode *new_inode = new_dentry->d_inode;
 456         struct page *old_dir_page;
 457         struct page *old_page, *new_page;
 458         struct f2fs_dir_entry *old_dir_entry = NULL;
 459         struct f2fs_dir_entry *old_entry;
 460         struct f2fs_dir_entry *new_entry;
 461         int err = -ENOENT;
 462
 463         f2fs_balance_fs(sbi);
 464
 465         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 466         if (!old_entry)
 467                 goto out;
 468
 469         if (S_ISDIR(old_inode->i_mode)) {
 470                 err = -EIO;
 471                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
 472                 if (!old_dir_entry)
 473                         goto out_old;
 474         }
 475
 476         if (new_inode) {
 477
 478                 err = -ENOTEMPTY;
 479                 if (old_dir_entry && !f2fs_empty_dir(new_inode))
 480                         goto out_dir;
 481
 482                 err = -ENOENT;
 483                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
 484                                                 &new_page);
 485                 if (!new_entry)
 486                         goto out_dir;
 487
 488                 f2fs_lock_op(sbi);
 489
 490                 err = acquire_orphan_inode(sbi);
 491                 if (err)
 492                         goto put_out_dir;
 493
 494                 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
 495                         release_orphan_inode(sbi);
 496                         goto put_out_dir;
 497                 }
 498
 499                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
 500
 501                 new_inode->i_ctime = CURRENT_TIME;
 502                 down_write(&F2FS_I(new_inode)->i_sem);
 503                 if (old_dir_entry)
 504                         drop_nlink(new_inode);
 505                 drop_nlink(new_inode);
 506                 up_write(&F2FS_I(new_inode)->i_sem);
 507
 508                 mark_inode_dirty(new_inode);
 509
 510                 if (!new_inode->i_nlink)
 511                         add_orphan_inode(sbi, new_inode->i_ino);
 512                 else
 513                         release_orphan_inode(sbi);
 514
 515                 update_inode_page(old_inode);
 516                 update_inode_page(new_inode);
 517         } else {
 518                 f2fs_lock_op(sbi);
 519
 520                 err = f2fs_add_link(new_dentry, old_inode);
 521                 if (err) {
 522                         f2fs_unlock_op(sbi);
 523                         goto out_dir;
 524                 }
 525
 526                 if (old_dir_entry) {
 527                         inc_nlink(new_dir);
 528                         update_inode_page(new_dir);
 529                 }
 530         }
 531
 532         down_write(&F2FS_I(old_inode)->i_sem);
 533         file_lost_pino(old_inode);
 534         up_write(&F2FS_I(old_inode)->i_sem);
 535
 536         old_inode->i_ctime = CURRENT_TIME;
 537         mark_inode_dirty(old_inode);
 538
 539         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
 540
 541         if (old_dir_entry) {
 542                 if (old_dir != new_dir) {
 543                         f2fs_set_link(old_inode, old_dir_entry,
 544                                                 old_dir_page, new_dir);
 545                         update_inode_page(old_inode);
 546                 } else {
 547                         f2fs_dentry_kunmap(old_inode, old_dir_page);
 548                         f2fs_put_page(old_dir_page, 0);
 549                 }
 550                 drop_nlink(old_dir);
 551                 mark_inode_dirty(old_dir);
 552                 update_inode_page(old_dir);
 553         }
 554
 555         f2fs_unlock_op(sbi);
 556
 557         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 558                 f2fs_sync_fs(sbi->sb, 1);
 559         return 0;
 560
 561 put_out_dir:
 562         f2fs_unlock_op(sbi);
 563         f2fs_dentry_kunmap(new_dir, new_page);
 564         f2fs_put_page(new_page, 0);
 565 out_dir:
 566         if (old_dir_entry) {
 567                 f2fs_dentry_kunmap(old_inode, old_dir_page);
 568                 f2fs_put_page(old_dir_page, 0);
 569         }
 570 out_old:
 571         f2fs_dentry_kunmap(old_dir, old_page);
 572         f2fs_put_page(old_page, 0);
 573 out:
 574         return err;
 575 }
 576
 577 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 578                              struct inode *new_dir, struct dentry *new_dentry)
 579 {
 580         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 581         struct inode *old_inode = old_dentry->d_inode;
 582         struct inode *new_inode = new_dentry->d_inode;
 583         struct page *old_dir_page, *new_dir_page;
 584         struct page *old_page, *new_page;
 585         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
 586         struct f2fs_dir_entry *old_entry, *new_entry;
 587         int old_nlink = 0, new_nlink = 0;
 588         int err = -ENOENT;
 589
 590         f2fs_balance_fs(sbi);
 591
 592         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 593         if (!old_entry)
 594                 goto out;
 595
 596         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
 597         if (!new_entry)
 598                 goto out_old;
 599
 600         /* prepare for updating ".." directory entry info later */
 601         if (old_dir != new_dir) {
 602                 if (S_ISDIR(old_inode->i_mode)) {
 603                         err = -EIO;
 604                         old_dir_entry = f2fs_parent_dir(old_inode,
 605                                                         &old_dir_page);
 606                         if (!old_dir_entry)
 607                                 goto out_new;
 608                 }
 609
 610                 if (S_ISDIR(new_inode->i_mode)) {
 611                         err = -EIO;
 612                         new_dir_entry = f2fs_parent_dir(new_inode,
 613                                                         &new_dir_page);
 614                         if (!new_dir_entry)
 615                                 goto out_old_dir;
 616                 }
 617         }
 618
 619         /*
 620          * If cross rename between file and directory those are not
 621          * in the same directory, we will inc nlink of file's parent
 622          * later, so we should check upper boundary of its nlink.
 623          */
 624         if ((!old_dir_entry || !new_dir_entry) &&
 625                                 old_dir_entry != new_dir_entry) {
 626                 old_nlink = old_dir_entry ? -1 : 1;
 627                 new_nlink = -old_nlink;
 628                 err = -EMLINK;
 629                 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
 630                         (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
 631                         goto out_new_dir;
 632         }
 633
 634         f2fs_lock_op(sbi);
 635
 636         err = update_dent_inode(old_inode, &new_dentry->d_name);
 637         if (err)
 638                 goto out_unlock;
 639
 640         err = update_dent_inode(new_inode, &old_dentry->d_name);
 641         if (err)
 642                 goto out_undo;
 643
 644         /* update ".." directory entry info of old dentry */
 645         if (old_dir_entry)
 646                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
 647
 648         /* update ".." directory entry info of new dentry */
 649         if (new_dir_entry)
 650                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
 651
 652         /* update directory entry info of old dir inode */
 653         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
 654
 655         down_write(&F2FS_I(old_inode)->i_sem);
 656         file_lost_pino(old_inode);
 657         up_write(&F2FS_I(old_inode)->i_sem);
 658
 659         update_inode_page(old_inode);
 660
 661         old_dir->i_ctime = CURRENT_TIME;
 662         if (old_nlink) {
 663                 down_write(&F2FS_I(old_dir)->i_sem);
 664                 if (old_nlink < 0)
 665                         drop_nlink(old_dir);
 666                 else
 667                         inc_nlink(old_dir);
 668                 up_write(&F2FS_I(old_dir)->i_sem);
 669         }
 670         mark_inode_dirty(old_dir);
 671         update_inode_page(old_dir);
 672
 673         /* update directory entry info of new dir inode */
 674         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
 675
 676         down_write(&F2FS_I(new_inode)->i_sem);
 677         file_lost_pino(new_inode);
 678         up_write(&F2FS_I(new_inode)->i_sem);
 679
 680         update_inode_page(new_inode);
 681
 682         new_dir->i_ctime = CURRENT_TIME;
 683         if (new_nlink) {
 684                 down_write(&F2FS_I(new_dir)->i_sem);
 685                 if (new_nlink < 0)
 686                         drop_nlink(new_dir);
 687                 else
 688                         inc_nlink(new_dir);
 689                 up_write(&F2FS_I(new_dir)->i_sem);
 690         }
 691         mark_inode_dirty(new_dir);
 692         update_inode_page(new_dir);
 693
 694         f2fs_unlock_op(sbi);
 695
 696         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 697                 f2fs_sync_fs(sbi->sb, 1);
 698         return 0;
 699 out_undo:
 700         /* Still we may fail to recover name info of f2fs_inode here */
 701         update_dent_inode(old_inode, &old_dentry->d_name);
 702 out_unlock:
 703         f2fs_unlock_op(sbi);
 704 out_new_dir:
 705         if (new_dir_entry) {
 706                 f2fs_dentry_kunmap(new_inode, new_dir_page);
 707                 f2fs_put_page(new_dir_page, 0);
 708         }
 709 out_old_dir:
 710         if (old_dir_entry) {
 711                 f2fs_dentry_kunmap(old_inode, old_dir_page);
 712                 f2fs_put_page(old_dir_page, 0);
 713         }
 714 out_new:
 715         f2fs_dentry_kunmap(new_dir, new_page);
 716         f2fs_put_page(new_page, 0);
 717 out_old:
 718         f2fs_dentry_kunmap(old_dir, old_page);
 719         f2fs_put_page(old_page, 0);
 720 out:
 721         return err;
 722 }
 723
 724 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
 725                         struct inode *new_dir, struct dentry *new_dentry,
 726                         unsigned int flags)
 727 {
 728         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
 729                 return -EINVAL;
 730
 731         if (flags & RENAME_EXCHANGE) {
 732                 return f2fs_cross_rename(old_dir, old_dentry,
 733                                          new_dir, new_dentry);
 734         }
 735         /*
 736          * VFS has already handled the new dentry existence case,
 737          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
 738          */
 739         return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
 740 }
 741
 742 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
 743 {
 744         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 745         struct inode *inode;
 746         int err;
 747
 748         inode = f2fs_new_inode(dir, mode);
 749         if (IS_ERR(inode))
 750                 return PTR_ERR(inode);
 751
 752         inode->i_op = &f2fs_file_inode_operations;
 753         inode->i_fop = &f2fs_file_operations;
 754         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 755
 756         f2fs_lock_op(sbi);
 757         err = acquire_orphan_inode(sbi);
 758         if (err)
 759                 goto out;
 760
 761         err = f2fs_do_tmpfile(inode, dir);
 762         if (err)
 763                 goto release_out;
 764
 765         /*
 766          * add this non-linked tmpfile to orphan list, in this way we could
 767          * remove all unused data of tmpfile after abnormal power-off.
 768          */
 769         add_orphan_inode(sbi, inode->i_ino);
 770         f2fs_unlock_op(sbi);
 771
 772         alloc_nid_done(sbi, inode->i_ino);
 773
 774         stat_inc_inline_inode(inode);
 775         d_tmpfile(dentry, inode);
 776         unlock_new_inode(inode);
 777         return 0;
 778
 779 release_out:
 780         release_orphan_inode(sbi);
 781 out:
 782         handle_failed_inode(inode);
 783         return err;
 784 }
 785
 786 const struct inode_operations f2fs_dir_inode_operations = {
 787         .create         = f2fs_create,
 788         .lookup         = f2fs_lookup,
 789         .link           = f2fs_link,
 790         .unlink         = f2fs_unlink,
 791         .symlink        = f2fs_symlink,
 792         .mkdir          = f2fs_mkdir,
 793         .rmdir          = f2fs_rmdir,
 794         .mknod          = f2fs_mknod,
 795         .rename2        = f2fs_rename2,
 796         .tmpfile        = f2fs_tmpfile,
 797         .getattr        = f2fs_getattr,
 798         .setattr        = f2fs_setattr,
 799         .get_acl        = f2fs_get_acl,
 800         .set_acl        = f2fs_set_acl,
 801 #ifdef CONFIG_F2FS_FS_XATTR
 802         .setxattr       = generic_setxattr,
 803         .getxattr       = generic_getxattr,
 804         .listxattr      = f2fs_listxattr,
 805         .removexattr    = generic_removexattr,
 806 #endif
 807 };
 808
 809 const struct inode_operations f2fs_symlink_inode_operations = {
 810         .readlink       = generic_readlink,
 811         .follow_link    = f2fs_follow_link,
 812         .put_link       = page_put_link,
 813         .getattr        = f2fs_getattr,
 814         .setattr        = f2fs_setattr,
 815 #ifdef CONFIG_F2FS_FS_XATTR
 816         .setxattr       = generic_setxattr,
 817         .getxattr       = generic_getxattr,
 818         .listxattr      = f2fs_listxattr,
 819         .removexattr    = generic_removexattr,
 820 #endif
 821 };
 822
 823 const struct inode_operations f2fs_special_inode_operations = {
 824         .getattr        = f2fs_getattr,
 825         .setattr        = f2fs_setattr,
 826         .get_acl        = f2fs_get_acl,
 827         .set_acl        = f2fs_set_acl,
 828 #ifdef CONFIG_F2FS_FS_XATTR
 829         .setxattr       = generic_setxattr,
 830         .getxattr       = generic_getxattr,
 831         .listxattr      = f2fs_listxattr,
 832         .removexattr    = generic_removexattr,
 833 #endif
 834 };