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