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 = d_inode(old_dentry);
 155         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 156         int err;
 157
 158         f2fs_balance_fs(sbi);
 159
 160         inode->i_ctime = CURRENT_TIME;
 161         ihold(inode);
 162
 163         set_inode_flag(F2FS_I(inode), FI_INC_LINK);
 164         f2fs_lock_op(sbi);
 165         err = f2fs_add_link(dentry, inode);
 166         if (err)
 167                 goto out;
 168         f2fs_unlock_op(sbi);
 169
 170         d_instantiate(dentry, inode);
 171
 172         if (IS_DIRSYNC(dir))
 173                 f2fs_sync_fs(sbi->sb, 1);
 174         return 0;
 175 out:
 176         clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
 177         iput(inode);
 178         f2fs_unlock_op(sbi);
 179         return err;
 180 }
 181
 182 struct dentry *f2fs_get_parent(struct dentry *child)
 183 {
 184         struct qstr dotdot = QSTR_INIT("..", 2);
 185         unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot);
 186         if (!ino)
 187                 return ERR_PTR(-ENOENT);
 188         return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino));
 189 }
 190
 191 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
 192 {
 193         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 194         struct qstr dot = QSTR_INIT(".", 1);
 195         struct qstr dotdot = QSTR_INIT("..", 2);
 196         struct f2fs_dir_entry *de;
 197         struct page *page;
 198         int err = 0;
 199
 200         f2fs_lock_op(sbi);
 201
 202         de = f2fs_find_entry(dir, &dot, &page);
 203         if (de) {
 204                 f2fs_dentry_kunmap(dir, page);
 205                 f2fs_put_page(page, 0);
 206         } else {
 207                 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
 208                 if (err)
 209                         goto out;
 210         }
 211
 212         de = f2fs_find_entry(dir, &dotdot, &page);
 213         if (de) {
 214                 f2fs_dentry_kunmap(dir, page);
 215                 f2fs_put_page(page, 0);
 216         } else {
 217                 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
 218         }
 219 out:
 220         if (!err) {
 221                 clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS);
 222                 mark_inode_dirty(dir);
 223         }
 224
 225         f2fs_unlock_op(sbi);
 226         return err;
 227 }
 228
 229 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 230                 unsigned int flags)
 231 {
 232         struct inode *inode = NULL;
 233         struct f2fs_dir_entry *de;
 234         struct page *page;
 235
 236         if (dentry->d_name.len > F2FS_NAME_LEN)
 237                 return ERR_PTR(-ENAMETOOLONG);
 238
 239         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 240         if (de) {
 241                 nid_t ino = le32_to_cpu(de->ino);
 242                 f2fs_dentry_kunmap(dir, page);
 243                 f2fs_put_page(page, 0);
 244
 245                 inode = f2fs_iget(dir->i_sb, ino);
 246                 if (IS_ERR(inode))
 247                         return ERR_CAST(inode);
 248
 249                 if (f2fs_has_inline_dots(inode)) {
 250                         int err;
 251
 252                         err = __recover_dot_dentries(inode, dir->i_ino);
 253                         if (err) {
 254                                 iget_failed(inode);
 255                                 return ERR_PTR(err);
 256                         }
 257                 }
 258         }
 259
 260         return d_splice_alias(inode, dentry);
 261 }
 262
 263 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 264 {
 265         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 266         struct inode *inode = d_inode(dentry);
 267         struct f2fs_dir_entry *de;
 268         struct page *page;
 269         int err = -ENOENT;
 270
 271         trace_f2fs_unlink_enter(dir, dentry);
 272         f2fs_balance_fs(sbi);
 273
 274         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 275         if (!de)
 276                 goto fail;
 277
 278         f2fs_lock_op(sbi);
 279         err = acquire_orphan_inode(sbi);
 280         if (err) {
 281                 f2fs_unlock_op(sbi);
 282                 f2fs_dentry_kunmap(dir, page);
 283                 f2fs_put_page(page, 0);
 284                 goto fail;
 285         }
 286         f2fs_delete_entry(de, page, dir, inode);
 287         f2fs_unlock_op(sbi);
 288
 289         /* In order to evict this inode, we set it dirty */
 290         mark_inode_dirty(inode);
 291
 292         if (IS_DIRSYNC(dir))
 293                 f2fs_sync_fs(sbi->sb, 1);
 294 fail:
 295         trace_f2fs_unlink_exit(inode, err);
 296         return err;
 297 }
 298
 299 static const char *f2fs_follow_link(struct dentry *dentry, void **cookie, struct nameidata *nd)
 300 {
 301         const char *link = page_follow_link_light(dentry, cookie, nd);
 302         if (!IS_ERR(link) && !*link) {
 303                 /* this is broken symlink case */
 304                 page_put_link(dentry, *cookie);
 305                 link = ERR_PTR(-ENOENT);
 306         }
 307         return link;
 308 }
 309
 310 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
 311                                         const char *symname)
 312 {
 313         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 314         struct inode *inode;
 315         size_t symlen = strlen(symname) + 1;
 316         int err;
 317
 318         f2fs_balance_fs(sbi);
 319
 320         inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
 321         if (IS_ERR(inode))
 322                 return PTR_ERR(inode);
 323
 324         inode->i_op = &f2fs_symlink_inode_operations;
 325         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 326
 327         f2fs_lock_op(sbi);
 328         err = f2fs_add_link(dentry, inode);
 329         if (err)
 330                 goto out;
 331         f2fs_unlock_op(sbi);
 332
 333         err = page_symlink(inode, symname, symlen);
 334         alloc_nid_done(sbi, inode->i_ino);
 335
 336         d_instantiate(dentry, inode);
 337         unlock_new_inode(inode);
 338
 339         /*
 340          * Let's flush symlink data in order to avoid broken symlink as much as
 341          * possible. Nevertheless, fsyncing is the best way, but there is no
 342          * way to get a file descriptor in order to flush that.
 343          *
 344          * Note that, it needs to do dir->fsync to make this recoverable.
 345          * If the symlink path is stored into inline_data, there is no
 346          * performance regression.
 347          */
 348         filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1);
 349
 350         if (IS_DIRSYNC(dir))
 351                 f2fs_sync_fs(sbi->sb, 1);
 352         return err;
 353 out:
 354         handle_failed_inode(inode);
 355         return err;
 356 }
 357
 358 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 359 {
 360         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 361         struct inode *inode;
 362         int err;
 363
 364         f2fs_balance_fs(sbi);
 365
 366         inode = f2fs_new_inode(dir, S_IFDIR | mode);
 367         if (IS_ERR(inode))
 368                 return PTR_ERR(inode);
 369
 370         inode->i_op = &f2fs_dir_inode_operations;
 371         inode->i_fop = &f2fs_dir_operations;
 372         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 373         mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
 374
 375         set_inode_flag(F2FS_I(inode), FI_INC_LINK);
 376         f2fs_lock_op(sbi);
 377         err = f2fs_add_link(dentry, inode);
 378         if (err)
 379                 goto out_fail;
 380         f2fs_unlock_op(sbi);
 381
 382         stat_inc_inline_dir(inode);
 383         alloc_nid_done(sbi, inode->i_ino);
 384
 385         d_instantiate(dentry, inode);
 386         unlock_new_inode(inode);
 387
 388         if (IS_DIRSYNC(dir))
 389                 f2fs_sync_fs(sbi->sb, 1);
 390         return 0;
 391
 392 out_fail:
 393         clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
 394         handle_failed_inode(inode);
 395         return err;
 396 }
 397
 398 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 399 {
 400         struct inode *inode = d_inode(dentry);
 401         if (f2fs_empty_dir(inode))
 402                 return f2fs_unlink(dir, dentry);
 403         return -ENOTEMPTY;
 404 }
 405
 406 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
 407                                 umode_t mode, dev_t rdev)
 408 {
 409         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 410         struct inode *inode;
 411         int err = 0;
 412
 413         if (!new_valid_dev(rdev))
 414                 return -EINVAL;
 415
 416         f2fs_balance_fs(sbi);
 417
 418         inode = f2fs_new_inode(dir, mode);
 419         if (IS_ERR(inode))
 420                 return PTR_ERR(inode);
 421
 422         init_special_inode(inode, inode->i_mode, rdev);
 423         inode->i_op = &f2fs_special_inode_operations;
 424
 425         f2fs_lock_op(sbi);
 426         err = f2fs_add_link(dentry, inode);
 427         if (err)
 428                 goto out;
 429         f2fs_unlock_op(sbi);
 430
 431         alloc_nid_done(sbi, inode->i_ino);
 432
 433         d_instantiate(dentry, inode);
 434         unlock_new_inode(inode);
 435
 436         if (IS_DIRSYNC(dir))
 437                 f2fs_sync_fs(sbi->sb, 1);
 438         return 0;
 439 out:
 440         handle_failed_inode(inode);
 441         return err;
 442 }
 443
 444 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 445                         struct inode *new_dir, struct dentry *new_dentry)
 446 {
 447         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 448         struct inode *old_inode = d_inode(old_dentry);
 449         struct inode *new_inode = d_inode(new_dentry);
 450         struct page *old_dir_page;
 451         struct page *old_page, *new_page;
 452         struct f2fs_dir_entry *old_dir_entry = NULL;
 453         struct f2fs_dir_entry *old_entry;
 454         struct f2fs_dir_entry *new_entry;
 455         int err = -ENOENT;
 456
 457         f2fs_balance_fs(sbi);
 458
 459         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 460         if (!old_entry)
 461                 goto out;
 462
 463         if (S_ISDIR(old_inode->i_mode)) {
 464                 err = -EIO;
 465                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
 466                 if (!old_dir_entry)
 467                         goto out_old;
 468         }
 469
 470         if (new_inode) {
 471
 472                 err = -ENOTEMPTY;
 473                 if (old_dir_entry && !f2fs_empty_dir(new_inode))
 474                         goto out_dir;
 475
 476                 err = -ENOENT;
 477                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
 478                                                 &new_page);
 479                 if (!new_entry)
 480                         goto out_dir;
 481
 482                 f2fs_lock_op(sbi);
 483
 484                 err = acquire_orphan_inode(sbi);
 485                 if (err)
 486                         goto put_out_dir;
 487
 488                 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
 489                         release_orphan_inode(sbi);
 490                         goto put_out_dir;
 491                 }
 492
 493                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
 494
 495                 new_inode->i_ctime = CURRENT_TIME;
 496                 down_write(&F2FS_I(new_inode)->i_sem);
 497                 if (old_dir_entry)
 498                         drop_nlink(new_inode);
 499                 drop_nlink(new_inode);
 500                 up_write(&F2FS_I(new_inode)->i_sem);
 501
 502                 mark_inode_dirty(new_inode);
 503
 504                 if (!new_inode->i_nlink)
 505                         add_orphan_inode(sbi, new_inode->i_ino);
 506                 else
 507                         release_orphan_inode(sbi);
 508
 509                 update_inode_page(old_inode);
 510                 update_inode_page(new_inode);
 511         } else {
 512                 f2fs_lock_op(sbi);
 513
 514                 err = f2fs_add_link(new_dentry, old_inode);
 515                 if (err) {
 516                         f2fs_unlock_op(sbi);
 517                         goto out_dir;
 518                 }
 519
 520                 if (old_dir_entry) {
 521                         inc_nlink(new_dir);
 522                         update_inode_page(new_dir);
 523                 }
 524         }
 525
 526         down_write(&F2FS_I(old_inode)->i_sem);
 527         file_lost_pino(old_inode);
 528         up_write(&F2FS_I(old_inode)->i_sem);
 529
 530         old_inode->i_ctime = CURRENT_TIME;
 531         mark_inode_dirty(old_inode);
 532
 533         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
 534
 535         if (old_dir_entry) {
 536                 if (old_dir != new_dir) {
 537                         f2fs_set_link(old_inode, old_dir_entry,
 538                                                 old_dir_page, new_dir);
 539                         update_inode_page(old_inode);
 540                 } else {
 541                         f2fs_dentry_kunmap(old_inode, old_dir_page);
 542                         f2fs_put_page(old_dir_page, 0);
 543                 }
 544                 drop_nlink(old_dir);
 545                 mark_inode_dirty(old_dir);
 546                 update_inode_page(old_dir);
 547         }
 548
 549         f2fs_unlock_op(sbi);
 550
 551         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 552                 f2fs_sync_fs(sbi->sb, 1);
 553         return 0;
 554
 555 put_out_dir:
 556         f2fs_unlock_op(sbi);
 557         f2fs_dentry_kunmap(new_dir, new_page);
 558         f2fs_put_page(new_page, 0);
 559 out_dir:
 560         if (old_dir_entry) {
 561                 f2fs_dentry_kunmap(old_inode, old_dir_page);
 562                 f2fs_put_page(old_dir_page, 0);
 563         }
 564 out_old:
 565         f2fs_dentry_kunmap(old_dir, old_page);
 566         f2fs_put_page(old_page, 0);
 567 out:
 568         return err;
 569 }
 570
 571 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 572                              struct inode *new_dir, struct dentry *new_dentry)
 573 {
 574         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 575         struct inode *old_inode = d_inode(old_dentry);
 576         struct inode *new_inode = d_inode(new_dentry);
 577         struct page *old_dir_page, *new_dir_page;
 578         struct page *old_page, *new_page;
 579         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
 580         struct f2fs_dir_entry *old_entry, *new_entry;
 581         int old_nlink = 0, new_nlink = 0;
 582         int err = -ENOENT;
 583
 584         f2fs_balance_fs(sbi);
 585
 586         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 587         if (!old_entry)
 588                 goto out;
 589
 590         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
 591         if (!new_entry)
 592                 goto out_old;
 593
 594         /* prepare for updating ".." directory entry info later */
 595         if (old_dir != new_dir) {
 596                 if (S_ISDIR(old_inode->i_mode)) {
 597                         err = -EIO;
 598                         old_dir_entry = f2fs_parent_dir(old_inode,
 599                                                         &old_dir_page);
 600                         if (!old_dir_entry)
 601                                 goto out_new;
 602                 }
 603
 604                 if (S_ISDIR(new_inode->i_mode)) {
 605                         err = -EIO;
 606                         new_dir_entry = f2fs_parent_dir(new_inode,
 607                                                         &new_dir_page);
 608                         if (!new_dir_entry)
 609                                 goto out_old_dir;
 610                 }
 611         }
 612
 613         /*
 614          * If cross rename between file and directory those are not
 615          * in the same directory, we will inc nlink of file's parent
 616          * later, so we should check upper boundary of its nlink.
 617          */
 618         if ((!old_dir_entry || !new_dir_entry) &&
 619                                 old_dir_entry != new_dir_entry) {
 620                 old_nlink = old_dir_entry ? -1 : 1;
 621                 new_nlink = -old_nlink;
 622                 err = -EMLINK;
 623                 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
 624                         (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
 625                         goto out_new_dir;
 626         }
 627
 628         f2fs_lock_op(sbi);
 629
 630         err = update_dent_inode(old_inode, &new_dentry->d_name);
 631         if (err)
 632                 goto out_unlock;
 633
 634         err = update_dent_inode(new_inode, &old_dentry->d_name);
 635         if (err)
 636                 goto out_undo;
 637
 638         /* update ".." directory entry info of old dentry */
 639         if (old_dir_entry)
 640                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
 641
 642         /* update ".." directory entry info of new dentry */
 643         if (new_dir_entry)
 644                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
 645
 646         /* update directory entry info of old dir inode */
 647         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
 648
 649         down_write(&F2FS_I(old_inode)->i_sem);
 650         file_lost_pino(old_inode);
 651         up_write(&F2FS_I(old_inode)->i_sem);
 652
 653         update_inode_page(old_inode);
 654
 655         old_dir->i_ctime = CURRENT_TIME;
 656         if (old_nlink) {
 657                 down_write(&F2FS_I(old_dir)->i_sem);
 658                 if (old_nlink < 0)
 659                         drop_nlink(old_dir);
 660                 else
 661                         inc_nlink(old_dir);
 662                 up_write(&F2FS_I(old_dir)->i_sem);
 663         }
 664         mark_inode_dirty(old_dir);
 665         update_inode_page(old_dir);
 666
 667         /* update directory entry info of new dir inode */
 668         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
 669
 670         down_write(&F2FS_I(new_inode)->i_sem);
 671         file_lost_pino(new_inode);
 672         up_write(&F2FS_I(new_inode)->i_sem);
 673
 674         update_inode_page(new_inode);
 675
 676         new_dir->i_ctime = CURRENT_TIME;
 677         if (new_nlink) {
 678                 down_write(&F2FS_I(new_dir)->i_sem);
 679                 if (new_nlink < 0)
 680                         drop_nlink(new_dir);
 681                 else
 682                         inc_nlink(new_dir);
 683                 up_write(&F2FS_I(new_dir)->i_sem);
 684         }
 685         mark_inode_dirty(new_dir);
 686         update_inode_page(new_dir);
 687
 688         f2fs_unlock_op(sbi);
 689
 690         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
 691                 f2fs_sync_fs(sbi->sb, 1);
 692         return 0;
 693 out_undo:
 694         /* Still we may fail to recover name info of f2fs_inode here */
 695         update_dent_inode(old_inode, &old_dentry->d_name);
 696 out_unlock:
 697         f2fs_unlock_op(sbi);
 698 out_new_dir:
 699         if (new_dir_entry) {
 700                 f2fs_dentry_kunmap(new_inode, new_dir_page);
 701                 f2fs_put_page(new_dir_page, 0);
 702         }
 703 out_old_dir:
 704         if (old_dir_entry) {
 705                 f2fs_dentry_kunmap(old_inode, old_dir_page);
 706                 f2fs_put_page(old_dir_page, 0);
 707         }
 708 out_new:
 709         f2fs_dentry_kunmap(new_dir, new_page);
 710         f2fs_put_page(new_page, 0);
 711 out_old:
 712         f2fs_dentry_kunmap(old_dir, old_page);
 713         f2fs_put_page(old_page, 0);
 714 out:
 715         return err;
 716 }
 717
 718 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
 719                         struct inode *new_dir, struct dentry *new_dentry,
 720                         unsigned int flags)
 721 {
 722         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
 723                 return -EINVAL;
 724
 725         if (flags & RENAME_EXCHANGE) {
 726                 return f2fs_cross_rename(old_dir, old_dentry,
 727                                          new_dir, new_dentry);
 728         }
 729         /*
 730          * VFS has already handled the new dentry existence case,
 731          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
 732          */
 733         return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
 734 }
 735
 736 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
 737 {
 738         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 739         struct inode *inode;
 740         int err;
 741
 742         inode = f2fs_new_inode(dir, mode);
 743         if (IS_ERR(inode))
 744                 return PTR_ERR(inode);
 745
 746         inode->i_op = &f2fs_file_inode_operations;
 747         inode->i_fop = &f2fs_file_operations;
 748         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 749
 750         f2fs_lock_op(sbi);
 751         err = acquire_orphan_inode(sbi);
 752         if (err)
 753                 goto out;
 754
 755         err = f2fs_do_tmpfile(inode, dir);
 756         if (err)
 757                 goto release_out;
 758
 759         /*
 760          * add this non-linked tmpfile to orphan list, in this way we could
 761          * remove all unused data of tmpfile after abnormal power-off.
 762          */
 763         add_orphan_inode(sbi, inode->i_ino);
 764         f2fs_unlock_op(sbi);
 765
 766         alloc_nid_done(sbi, inode->i_ino);
 767
 768         stat_inc_inline_inode(inode);
 769         d_tmpfile(dentry, inode);
 770         unlock_new_inode(inode);
 771         return 0;
 772
 773 release_out:
 774         release_orphan_inode(sbi);
 775 out:
 776         handle_failed_inode(inode);
 777         return err;
 778 }
 779
 780 const struct inode_operations f2fs_dir_inode_operations = {
 781         .create         = f2fs_create,
 782         .lookup         = f2fs_lookup,
 783         .link           = f2fs_link,
 784         .unlink         = f2fs_unlink,
 785         .symlink        = f2fs_symlink,
 786         .mkdir          = f2fs_mkdir,
 787         .rmdir          = f2fs_rmdir,
 788         .mknod          = f2fs_mknod,
 789         .rename2        = f2fs_rename2,
 790         .tmpfile        = f2fs_tmpfile,
 791         .getattr        = f2fs_getattr,
 792         .setattr        = f2fs_setattr,
 793         .get_acl        = f2fs_get_acl,
 794         .set_acl        = f2fs_set_acl,
 795 #ifdef CONFIG_F2FS_FS_XATTR
 796         .setxattr       = generic_setxattr,
 797         .getxattr       = generic_getxattr,
 798         .listxattr      = f2fs_listxattr,
 799         .removexattr    = generic_removexattr,
 800 #endif
 801 };
 802
 803 const struct inode_operations f2fs_symlink_inode_operations = {
 804         .readlink       = generic_readlink,
 805         .follow_link    = f2fs_follow_link,
 806         .put_link       = page_put_link,
 807         .getattr        = f2fs_getattr,
 808         .setattr        = f2fs_setattr,
 809 #ifdef CONFIG_F2FS_FS_XATTR
 810         .setxattr       = generic_setxattr,
 811         .getxattr       = generic_getxattr,
 812         .listxattr      = f2fs_listxattr,
 813         .removexattr    = generic_removexattr,
 814 #endif
 815 };
 816
 817 const struct inode_operations f2fs_special_inode_operations = {
 818         .getattr        = f2fs_getattr,
 819         .setattr        = f2fs_setattr,
 820         .get_acl        = f2fs_get_acl,
 821         .set_acl        = f2fs_set_acl,
 822 #ifdef CONFIG_F2FS_FS_XATTR
 823         .setxattr       = generic_setxattr,
 824         .getxattr       = generic_getxattr,
 825         .listxattr      = f2fs_listxattr,
 826         .removexattr    = generic_removexattr,
 827 #endif
 828 };