fs/f2fs/namei.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/namei.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/fs.h>
   9 #include <linux/f2fs_fs.h>
  10 #include <linux/pagemap.h>
  11 #include <linux/sched.h>
  12 #include <linux/ctype.h>
  13 #include <linux/random.h>
  14 #include <linux/dcache.h>
  15 #include <linux/namei.h>
  16 #include <linux/quotaops.h>
  17
  18 #include "f2fs.h"
  19 #include "node.h"
  20 #include "segment.h"
  21 #include "xattr.h"
  22 #include "acl.h"
  23 #include <trace/events/f2fs.h>
  24
  25 static inline bool is_extension_exist(const unsigned char *s, const char *sub,
  26                                                 bool tmp_ext, bool tmp_dot)
  27 {
  28         size_t slen = strlen(s);
  29         size_t sublen = strlen(sub);
  30         int i;
  31
  32         if (sublen == 1 && *sub == '*')
  33                 return true;
  34
  35         /*
  36          * filename format of multimedia file should be defined as:
  37          * "filename + '.' + extension + (optional: '.' + temp extension)".
  38          */
  39         if (slen < sublen + 2)
  40                 return false;
  41
  42         if (!tmp_ext) {
  43                 /* file has no temp extension */
  44                 if (s[slen - sublen - 1] != '.')
  45                         return false;
  46                 return !strncasecmp(s + slen - sublen, sub, sublen);
  47         }
  48
  49         for (i = 1; i < slen - sublen; i++) {
  50                 if (s[i] != '.')
  51                         continue;
  52                 if (!strncasecmp(s + i + 1, sub, sublen)) {
  53                         if (!tmp_dot)
  54                                 return true;
  55                         if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')
  56                                 return true;
  57                 }
  58         }
  59
  60         return false;
  61 }
  62
  63 static inline bool is_temperature_extension(const unsigned char *s, const char *sub)
  64 {
  65         return is_extension_exist(s, sub, true, false);
  66 }
  67
  68 static inline bool is_compress_extension(const unsigned char *s, const char *sub)
  69 {
  70         return is_extension_exist(s, sub, true, true);
  71 }
  72
  73 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
  74                                                         bool hot, bool set)
  75 {
  76         __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
  77         int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
  78         int hot_count = sbi->raw_super->hot_ext_count;
  79         int total_count = cold_count + hot_count;
  80         int start, count;
  81         int i;
  82
  83         if (set) {
  84                 if (total_count == F2FS_MAX_EXTENSION)
  85                         return -EINVAL;
  86         } else {
  87                 if (!hot && !cold_count)
  88                         return -EINVAL;
  89                 if (hot && !hot_count)
  90                         return -EINVAL;
  91         }
  92
  93         if (hot) {
  94                 start = cold_count;
  95                 count = total_count;
  96         } else {
  97                 start = 0;
  98                 count = cold_count;
  99         }
 100
 101         for (i = start; i < count; i++) {
 102                 if (strcmp(name, extlist[i]))
 103                         continue;
 104
 105                 if (set)
 106                         return -EINVAL;
 107
 108                 memcpy(extlist[i], extlist[i + 1],
 109                                 F2FS_EXTENSION_LEN * (total_count - i - 1));
 110                 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
 111                 if (hot)
 112                         sbi->raw_super->hot_ext_count = hot_count - 1;
 113                 else
 114                         sbi->raw_super->extension_count =
 115                                                 cpu_to_le32(cold_count - 1);
 116                 return 0;
 117         }
 118
 119         if (!set)
 120                 return -EINVAL;
 121
 122         if (hot) {
 123                 memcpy(extlist[count], name, strlen(name));
 124                 sbi->raw_super->hot_ext_count = hot_count + 1;
 125         } else {
 126                 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
 127
 128                 memcpy(buf, &extlist[cold_count],
 129                                 F2FS_EXTENSION_LEN * hot_count);
 130                 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
 131                 memcpy(extlist[cold_count], name, strlen(name));
 132                 memcpy(&extlist[cold_count + 1], buf,
 133                                 F2FS_EXTENSION_LEN * hot_count);
 134                 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
 135         }
 136         return 0;
 137 }
 138
 139 static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
 140                                 struct inode *inode, const unsigned char *name)
 141 {
 142         __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
 143         unsigned char (*noext)[F2FS_EXTENSION_LEN] =
 144                                                 F2FS_OPTION(sbi).noextensions;
 145         unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
 146         unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 147         unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 148         int i, cold_count, hot_count;
 149
 150         if (!f2fs_sb_has_compression(sbi))
 151                 return;
 152
 153         if (S_ISDIR(inode->i_mode))
 154                 goto inherit_comp;
 155
 156         /* This name comes only from normal files. */
 157         if (!name)
 158                 return;
 159
 160         /* Don't compress hot files. */
 161         f2fs_down_read(&sbi->sb_lock);
 162         cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 163         hot_count = sbi->raw_super->hot_ext_count;
 164         for (i = cold_count; i < cold_count + hot_count; i++)
 165                 if (is_temperature_extension(name, extlist[i]))
 166                         break;
 167         f2fs_up_read(&sbi->sb_lock);
 168         if (i < (cold_count + hot_count))
 169                 return;
 170
 171         /* Don't compress unallowed extension. */
 172         for (i = 0; i < noext_cnt; i++)
 173                 if (is_compress_extension(name, noext[i]))
 174                         return;
 175
 176         /* Compress wanting extension. */
 177         for (i = 0; i < ext_cnt; i++) {
 178                 if (is_compress_extension(name, ext[i])) {
 179                         set_compress_context(inode);
 180                         return;
 181                 }
 182         }
 183 inherit_comp:
 184         /* Inherit the {no-}compression flag in directory */
 185         if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
 186                 F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
 187                 f2fs_mark_inode_dirty_sync(inode, true);
 188         } else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
 189                 set_compress_context(inode);
 190         }
 191 }
 192
 193 /*
 194  * Set file's temperature for hot/cold data separation
 195  */
 196 static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
 197                 const unsigned char *name)
 198 {
 199         __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
 200         int i, cold_count, hot_count;
 201
 202         f2fs_down_read(&sbi->sb_lock);
 203         cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 204         hot_count = sbi->raw_super->hot_ext_count;
 205         for (i = 0; i < cold_count + hot_count; i++)
 206                 if (is_temperature_extension(name, extlist[i]))
 207                         break;
 208         f2fs_up_read(&sbi->sb_lock);
 209
 210         if (i == cold_count + hot_count)
 211                 return;
 212
 213         if (i < cold_count)
 214                 file_set_cold(inode);
 215         else
 216                 file_set_hot(inode);
 217 }
 218
 219 static struct inode *f2fs_new_inode(struct mnt_idmap *idmap,
 220                                                 struct inode *dir, umode_t mode,
 221                                                 const char *name)
 222 {
 223         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 224         nid_t ino;
 225         struct inode *inode;
 226         bool nid_free = false;
 227         bool encrypt = false;
 228         int xattr_size = 0;
 229         int err;
 230
 231         inode = new_inode(dir->i_sb);
 232         if (!inode)
 233                 return ERR_PTR(-ENOMEM);
 234
 235         if (!f2fs_alloc_nid(sbi, &ino)) {
 236                 err = -ENOSPC;
 237                 goto fail;
 238         }
 239
 240         nid_free = true;
 241
 242         inode_init_owner(idmap, inode, dir, mode);
 243
 244         inode->i_ino = ino;
 245         inode->i_blocks = 0;
 246         simple_inode_init_ts(inode);
 247         F2FS_I(inode)->i_crtime = inode_get_mtime(inode);
 248         inode->i_generation = get_random_u32();
 249
 250         if (S_ISDIR(inode->i_mode))
 251                 F2FS_I(inode)->i_current_depth = 1;
 252
 253         err = insert_inode_locked(inode);
 254         if (err) {
 255                 err = -EINVAL;
 256                 goto fail;
 257         }
 258
 259         if (f2fs_sb_has_project_quota(sbi) &&
 260                 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
 261                 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
 262         else
 263                 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
 264                                                         F2FS_DEF_PROJID);
 265
 266         err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
 267         if (err)
 268                 goto fail_drop;
 269
 270         err = f2fs_dquot_initialize(inode);
 271         if (err)
 272                 goto fail_drop;
 273
 274         set_inode_flag(inode, FI_NEW_INODE);
 275
 276         if (encrypt)
 277                 f2fs_set_encrypted_inode(inode);
 278
 279         if (f2fs_sb_has_extra_attr(sbi)) {
 280                 set_inode_flag(inode, FI_EXTRA_ATTR);
 281                 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
 282         }
 283
 284         if (test_opt(sbi, INLINE_XATTR))
 285                 set_inode_flag(inode, FI_INLINE_XATTR);
 286
 287         if (f2fs_may_inline_dentry(inode))
 288                 set_inode_flag(inode, FI_INLINE_DENTRY);
 289
 290         if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
 291                 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
 292                 if (f2fs_has_inline_xattr(inode))
 293                         xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
 294                 /* Otherwise, will be 0 */
 295         } else if (f2fs_has_inline_xattr(inode) ||
 296                                 f2fs_has_inline_dentry(inode)) {
 297                 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
 298         }
 299         F2FS_I(inode)->i_inline_xattr_size = xattr_size;
 300
 301         F2FS_I(inode)->i_flags =
 302                 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
 303
 304         if (S_ISDIR(inode->i_mode))
 305                 F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
 306
 307         if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
 308                 set_inode_flag(inode, FI_PROJ_INHERIT);
 309
 310         /* Check compression first. */
 311         set_compress_new_inode(sbi, dir, inode, name);
 312
 313         /* Should enable inline_data after compression set */
 314         if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
 315                 set_inode_flag(inode, FI_INLINE_DATA);
 316
 317         if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
 318                 set_file_temperature(sbi, inode, name);
 319
 320         stat_inc_inline_xattr(inode);
 321         stat_inc_inline_inode(inode);
 322         stat_inc_inline_dir(inode);
 323
 324         f2fs_set_inode_flags(inode);
 325
 326         f2fs_init_extent_tree(inode);
 327
 328         trace_f2fs_new_inode(inode, 0);
 329         return inode;
 330
 331 fail:
 332         trace_f2fs_new_inode(inode, err);
 333         make_bad_inode(inode);
 334         if (nid_free)
 335                 set_inode_flag(inode, FI_FREE_NID);
 336         iput(inode);
 337         return ERR_PTR(err);
 338 fail_drop:
 339         trace_f2fs_new_inode(inode, err);
 340         dquot_drop(inode);
 341         inode->i_flags |= S_NOQUOTA;
 342         if (nid_free)
 343                 set_inode_flag(inode, FI_FREE_NID);
 344         clear_nlink(inode);
 345         unlock_new_inode(inode);
 346         iput(inode);
 347         return ERR_PTR(err);
 348 }
 349
 350 static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
 351                        struct dentry *dentry, umode_t mode, bool excl)
 352 {
 353         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 354         struct inode *inode;
 355         nid_t ino = 0;
 356         int err;
 357
 358         if (unlikely(f2fs_cp_error(sbi)))
 359                 return -EIO;
 360         if (!f2fs_is_checkpoint_ready(sbi))
 361                 return -ENOSPC;
 362
 363         err = f2fs_dquot_initialize(dir);
 364         if (err)
 365                 return err;
 366
 367         inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
 368         if (IS_ERR(inode))
 369                 return PTR_ERR(inode);
 370
 371         inode->i_op = &f2fs_file_inode_operations;
 372         inode->i_fop = &f2fs_file_operations;
 373         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 374         ino = inode->i_ino;
 375
 376         f2fs_lock_op(sbi);
 377         err = f2fs_add_link(dentry, inode);
 378         if (err)
 379                 goto out;
 380         f2fs_unlock_op(sbi);
 381
 382         f2fs_alloc_nid_done(sbi, ino);
 383
 384         d_instantiate_new(dentry, inode);
 385
 386         if (IS_DIRSYNC(dir))
 387                 f2fs_sync_fs(sbi->sb, 1);
 388
 389         f2fs_balance_fs(sbi, true);
 390         return 0;
 391 out:
 392         f2fs_handle_failed_inode(inode);
 393         return err;
 394 }
 395
 396 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
 397                 struct dentry *dentry)
 398 {
 399         struct inode *inode = d_inode(old_dentry);
 400         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 401         int err;
 402
 403         if (unlikely(f2fs_cp_error(sbi)))
 404                 return -EIO;
 405         if (!f2fs_is_checkpoint_ready(sbi))
 406                 return -ENOSPC;
 407
 408         err = fscrypt_prepare_link(old_dentry, dir, dentry);
 409         if (err)
 410                 return err;
 411
 412         if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
 413                         (!projid_eq(F2FS_I(dir)->i_projid,
 414                         F2FS_I(old_dentry->d_inode)->i_projid)))
 415                 return -EXDEV;
 416
 417         err = f2fs_dquot_initialize(dir);
 418         if (err)
 419                 return err;
 420
 421         f2fs_balance_fs(sbi, true);
 422
 423         inode_set_ctime_current(inode);
 424         ihold(inode);
 425
 426         set_inode_flag(inode, FI_INC_LINK);
 427         f2fs_lock_op(sbi);
 428         err = f2fs_add_link(dentry, inode);
 429         if (err)
 430                 goto out;
 431         f2fs_unlock_op(sbi);
 432
 433         d_instantiate(dentry, inode);
 434
 435         if (IS_DIRSYNC(dir))
 436                 f2fs_sync_fs(sbi->sb, 1);
 437         return 0;
 438 out:
 439         clear_inode_flag(inode, FI_INC_LINK);
 440         iput(inode);
 441         f2fs_unlock_op(sbi);
 442         return err;
 443 }
 444
 445 struct dentry *f2fs_get_parent(struct dentry *child)
 446 {
 447         struct page *page;
 448         unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
 449
 450         if (!ino) {
 451                 if (IS_ERR(page))
 452                         return ERR_CAST(page);
 453                 return ERR_PTR(-ENOENT);
 454         }
 455         return d_obtain_alias(f2fs_iget(child->d_sb, ino));
 456 }
 457
 458 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
 459 {
 460         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 461         struct qstr dot = QSTR_INIT(".", 1);
 462         struct qstr dotdot = QSTR_INIT("..", 2);
 463         struct f2fs_dir_entry *de;
 464         struct page *page;
 465         int err = 0;
 466
 467         if (f2fs_readonly(sbi->sb)) {
 468                 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
 469                           dir->i_ino, pino);
 470                 return 0;
 471         }
 472
 473         if (!S_ISDIR(dir->i_mode)) {
 474                 f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)",
 475                           dir->i_ino, dir->i_mode, pino);
 476                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 477                 return -ENOTDIR;
 478         }
 479
 480         err = f2fs_dquot_initialize(dir);
 481         if (err)
 482                 return err;
 483
 484         f2fs_balance_fs(sbi, true);
 485
 486         f2fs_lock_op(sbi);
 487
 488         de = f2fs_find_entry(dir, &dot, &page);
 489         if (de) {
 490                 f2fs_put_page(page, 0);
 491         } else if (IS_ERR(page)) {
 492                 err = PTR_ERR(page);
 493                 goto out;
 494         } else {
 495                 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
 496                 if (err)
 497                         goto out;
 498         }
 499
 500         de = f2fs_find_entry(dir, &dotdot, &page);
 501         if (de)
 502                 f2fs_put_page(page, 0);
 503         else if (IS_ERR(page))
 504                 err = PTR_ERR(page);
 505         else
 506                 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
 507 out:
 508         if (!err)
 509                 clear_inode_flag(dir, FI_INLINE_DOTS);
 510
 511         f2fs_unlock_op(sbi);
 512         return err;
 513 }
 514
 515 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 516                 unsigned int flags)
 517 {
 518         struct inode *inode = NULL;
 519         struct f2fs_dir_entry *de;
 520         struct page *page;
 521         struct dentry *new;
 522         nid_t ino = -1;
 523         int err = 0;
 524         unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
 525         struct f2fs_filename fname;
 526
 527         trace_f2fs_lookup_start(dir, dentry, flags);
 528
 529         if (dentry->d_name.len > F2FS_NAME_LEN) {
 530                 err = -ENAMETOOLONG;
 531                 goto out;
 532         }
 533
 534         err = f2fs_prepare_lookup(dir, dentry, &fname);
 535         generic_set_encrypted_ci_d_ops(dentry);
 536         if (err == -ENOENT)
 537                 goto out_splice;
 538         if (err)
 539                 goto out;
 540         de = __f2fs_find_entry(dir, &fname, &page);
 541         f2fs_free_filename(&fname);
 542
 543         if (!de) {
 544                 if (IS_ERR(page)) {
 545                         err = PTR_ERR(page);
 546                         goto out;
 547                 }
 548                 err = -ENOENT;
 549                 goto out_splice;
 550         }
 551
 552         ino = le32_to_cpu(de->ino);
 553         f2fs_put_page(page, 0);
 554
 555         inode = f2fs_iget(dir->i_sb, ino);
 556         if (IS_ERR(inode)) {
 557                 err = PTR_ERR(inode);
 558                 goto out;
 559         }
 560
 561         if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
 562                 err = __recover_dot_dentries(dir, root_ino);
 563                 if (err)
 564                         goto out_iput;
 565         }
 566
 567         if (f2fs_has_inline_dots(inode)) {
 568                 err = __recover_dot_dentries(inode, dir->i_ino);
 569                 if (err)
 570                         goto out_iput;
 571         }
 572         if (IS_ENCRYPTED(dir) &&
 573             (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 574             !fscrypt_has_permitted_context(dir, inode)) {
 575                 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
 576                           dir->i_ino, inode->i_ino);
 577                 err = -EPERM;
 578                 goto out_iput;
 579         }
 580 out_splice:
 581 #if IS_ENABLED(CONFIG_UNICODE)
 582         if (!inode && IS_CASEFOLDED(dir)) {
 583                 /* Eventually we want to call d_add_ci(dentry, NULL)
 584                  * for negative dentries in the encoding case as
 585                  * well.  For now, prevent the negative dentry
 586                  * from being cached.
 587                  */
 588                 trace_f2fs_lookup_end(dir, dentry, ino, err);
 589                 return NULL;
 590         }
 591 #endif
 592         new = d_splice_alias(inode, dentry);
 593         trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
 594                                 ino, IS_ERR(new) ? PTR_ERR(new) : err);
 595         return new;
 596 out_iput:
 597         iput(inode);
 598 out:
 599         trace_f2fs_lookup_end(dir, dentry, ino, err);
 600         return ERR_PTR(err);
 601 }
 602
 603 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 604 {
 605         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 606         struct inode *inode = d_inode(dentry);
 607         struct f2fs_dir_entry *de;
 608         struct page *page;
 609         int err;
 610
 611         trace_f2fs_unlink_enter(dir, dentry);
 612
 613         if (unlikely(f2fs_cp_error(sbi))) {
 614                 err = -EIO;
 615                 goto fail;
 616         }
 617
 618         err = f2fs_dquot_initialize(dir);
 619         if (err)
 620                 goto fail;
 621         err = f2fs_dquot_initialize(inode);
 622         if (err)
 623                 goto fail;
 624
 625         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 626         if (!de) {
 627                 if (IS_ERR(page))
 628                         err = PTR_ERR(page);
 629                 goto fail;
 630         }
 631
 632         f2fs_balance_fs(sbi, true);
 633
 634         f2fs_lock_op(sbi);
 635         err = f2fs_acquire_orphan_inode(sbi);
 636         if (err) {
 637                 f2fs_unlock_op(sbi);
 638                 f2fs_put_page(page, 0);
 639                 goto fail;
 640         }
 641         f2fs_delete_entry(de, page, dir, inode);
 642         f2fs_unlock_op(sbi);
 643
 644 #if IS_ENABLED(CONFIG_UNICODE)
 645         /* VFS negative dentries are incompatible with Encoding and
 646          * Case-insensitiveness. Eventually we'll want avoid
 647          * invalidating the dentries here, alongside with returning the
 648          * negative dentries at f2fs_lookup(), when it is better
 649          * supported by the VFS for the CI case.
 650          */
 651         if (IS_CASEFOLDED(dir))
 652                 d_invalidate(dentry);
 653 #endif
 654         if (IS_DIRSYNC(dir))
 655                 f2fs_sync_fs(sbi->sb, 1);
 656 fail:
 657         trace_f2fs_unlink_exit(inode, err);
 658         return err;
 659 }
 660
 661 static const char *f2fs_get_link(struct dentry *dentry,
 662                                  struct inode *inode,
 663                                  struct delayed_call *done)
 664 {
 665         const char *link = page_get_link(dentry, inode, done);
 666
 667         if (!IS_ERR(link) && !*link) {
 668                 /* this is broken symlink case */
 669                 do_delayed_call(done);
 670                 clear_delayed_call(done);
 671                 link = ERR_PTR(-ENOENT);
 672         }
 673         return link;
 674 }
 675
 676 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
 677                         struct dentry *dentry, const char *symname)
 678 {
 679         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 680         struct inode *inode;
 681         size_t len = strlen(symname);
 682         struct fscrypt_str disk_link;
 683         int err;
 684
 685         if (unlikely(f2fs_cp_error(sbi)))
 686                 return -EIO;
 687         if (!f2fs_is_checkpoint_ready(sbi))
 688                 return -ENOSPC;
 689
 690         err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
 691                                       &disk_link);
 692         if (err)
 693                 return err;
 694
 695         err = f2fs_dquot_initialize(dir);
 696         if (err)
 697                 return err;
 698
 699         inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
 700         if (IS_ERR(inode))
 701                 return PTR_ERR(inode);
 702
 703         if (IS_ENCRYPTED(inode))
 704                 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 705         else
 706                 inode->i_op = &f2fs_symlink_inode_operations;
 707         inode_nohighmem(inode);
 708         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 709
 710         f2fs_lock_op(sbi);
 711         err = f2fs_add_link(dentry, inode);
 712         if (err)
 713                 goto out_f2fs_handle_failed_inode;
 714         f2fs_unlock_op(sbi);
 715         f2fs_alloc_nid_done(sbi, inode->i_ino);
 716
 717         err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
 718         if (err)
 719                 goto err_out;
 720
 721         err = page_symlink(inode, disk_link.name, disk_link.len);
 722
 723 err_out:
 724         d_instantiate_new(dentry, inode);
 725
 726         /*
 727          * Let's flush symlink data in order to avoid broken symlink as much as
 728          * possible. Nevertheless, fsyncing is the best way, but there is no
 729          * way to get a file descriptor in order to flush that.
 730          *
 731          * Note that, it needs to do dir->fsync to make this recoverable.
 732          * If the symlink path is stored into inline_data, there is no
 733          * performance regression.
 734          */
 735         if (!err) {
 736                 filemap_write_and_wait_range(inode->i_mapping, 0,
 737                                                         disk_link.len - 1);
 738
 739                 if (IS_DIRSYNC(dir))
 740                         f2fs_sync_fs(sbi->sb, 1);
 741         } else {
 742                 f2fs_unlink(dir, dentry);
 743         }
 744
 745         f2fs_balance_fs(sbi, true);
 746         goto out_free_encrypted_link;
 747
 748 out_f2fs_handle_failed_inode:
 749         f2fs_handle_failed_inode(inode);
 750 out_free_encrypted_link:
 751         if (disk_link.name != (unsigned char *)symname)
 752                 kfree(disk_link.name);
 753         return err;
 754 }
 755
 756 static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
 757                       struct dentry *dentry, umode_t mode)
 758 {
 759         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 760         struct inode *inode;
 761         int err;
 762
 763         if (unlikely(f2fs_cp_error(sbi)))
 764                 return -EIO;
 765
 766         err = f2fs_dquot_initialize(dir);
 767         if (err)
 768                 return err;
 769
 770         inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
 771         if (IS_ERR(inode))
 772                 return PTR_ERR(inode);
 773
 774         inode->i_op = &f2fs_dir_inode_operations;
 775         inode->i_fop = &f2fs_dir_operations;
 776         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 777         mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 778
 779         set_inode_flag(inode, FI_INC_LINK);
 780         f2fs_lock_op(sbi);
 781         err = f2fs_add_link(dentry, inode);
 782         if (err)
 783                 goto out_fail;
 784         f2fs_unlock_op(sbi);
 785
 786         f2fs_alloc_nid_done(sbi, inode->i_ino);
 787
 788         d_instantiate_new(dentry, inode);
 789
 790         if (IS_DIRSYNC(dir))
 791                 f2fs_sync_fs(sbi->sb, 1);
 792
 793         f2fs_balance_fs(sbi, true);
 794         return 0;
 795
 796 out_fail:
 797         clear_inode_flag(inode, FI_INC_LINK);
 798         f2fs_handle_failed_inode(inode);
 799         return err;
 800 }
 801
 802 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 803 {
 804         struct inode *inode = d_inode(dentry);
 805
 806         if (f2fs_empty_dir(inode))
 807                 return f2fs_unlink(dir, dentry);
 808         return -ENOTEMPTY;
 809 }
 810
 811 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
 812                       struct dentry *dentry, umode_t mode, dev_t rdev)
 813 {
 814         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 815         struct inode *inode;
 816         int err = 0;
 817
 818         if (unlikely(f2fs_cp_error(sbi)))
 819                 return -EIO;
 820         if (!f2fs_is_checkpoint_ready(sbi))
 821                 return -ENOSPC;
 822
 823         err = f2fs_dquot_initialize(dir);
 824         if (err)
 825                 return err;
 826
 827         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 828         if (IS_ERR(inode))
 829                 return PTR_ERR(inode);
 830
 831         init_special_inode(inode, inode->i_mode, rdev);
 832         inode->i_op = &f2fs_special_inode_operations;
 833
 834         f2fs_lock_op(sbi);
 835         err = f2fs_add_link(dentry, inode);
 836         if (err)
 837                 goto out;
 838         f2fs_unlock_op(sbi);
 839
 840         f2fs_alloc_nid_done(sbi, inode->i_ino);
 841
 842         d_instantiate_new(dentry, inode);
 843
 844         if (IS_DIRSYNC(dir))
 845                 f2fs_sync_fs(sbi->sb, 1);
 846
 847         f2fs_balance_fs(sbi, true);
 848         return 0;
 849 out:
 850         f2fs_handle_failed_inode(inode);
 851         return err;
 852 }
 853
 854 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 855                           struct file *file, umode_t mode, bool is_whiteout,
 856                           struct inode **new_inode)
 857 {
 858         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 859         struct inode *inode;
 860         int err;
 861
 862         err = f2fs_dquot_initialize(dir);
 863         if (err)
 864                 return err;
 865
 866         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 867         if (IS_ERR(inode))
 868                 return PTR_ERR(inode);
 869
 870         if (is_whiteout) {
 871                 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
 872                 inode->i_op = &f2fs_special_inode_operations;
 873         } else {
 874                 inode->i_op = &f2fs_file_inode_operations;
 875                 inode->i_fop = &f2fs_file_operations;
 876                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 877         }
 878
 879         f2fs_lock_op(sbi);
 880         err = f2fs_acquire_orphan_inode(sbi);
 881         if (err)
 882                 goto out;
 883
 884         err = f2fs_do_tmpfile(inode, dir);
 885         if (err)
 886                 goto release_out;
 887
 888         /*
 889          * add this non-linked tmpfile to orphan list, in this way we could
 890          * remove all unused data of tmpfile after abnormal power-off.
 891          */
 892         f2fs_add_orphan_inode(inode);
 893         f2fs_alloc_nid_done(sbi, inode->i_ino);
 894
 895         if (is_whiteout) {
 896                 f2fs_i_links_write(inode, false);
 897
 898                 spin_lock(&inode->i_lock);
 899                 inode->i_state |= I_LINKABLE;
 900                 spin_unlock(&inode->i_lock);
 901         } else {
 902                 if (file)
 903                         d_tmpfile(file, inode);
 904                 else
 905                         f2fs_i_links_write(inode, false);
 906         }
 907         /* link_count was changed by d_tmpfile as well. */
 908         f2fs_unlock_op(sbi);
 909         unlock_new_inode(inode);
 910
 911         if (new_inode)
 912                 *new_inode = inode;
 913
 914         f2fs_balance_fs(sbi, true);
 915         return 0;
 916
 917 release_out:
 918         f2fs_release_orphan_inode(sbi);
 919 out:
 920         f2fs_handle_failed_inode(inode);
 921         return err;
 922 }
 923
 924 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 925                         struct file *file, umode_t mode)
 926 {
 927         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 928         int err;
 929
 930         if (unlikely(f2fs_cp_error(sbi)))
 931                 return -EIO;
 932         if (!f2fs_is_checkpoint_ready(sbi))
 933                 return -ENOSPC;
 934
 935         err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL);
 936
 937         return finish_open_simple(file, err);
 938 }
 939
 940 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
 941                                 struct inode *dir, struct inode **whiteout)
 942 {
 943         return __f2fs_tmpfile(idmap, dir, NULL,
 944                                 S_IFCHR | WHITEOUT_MODE, true, whiteout);
 945 }
 946
 947 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 948                      struct inode **new_inode)
 949 {
 950         return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG, false, new_inode);
 951 }
 952
 953 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 954                         struct dentry *old_dentry, struct inode *new_dir,
 955                         struct dentry *new_dentry, unsigned int flags)
 956 {
 957         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 958         struct inode *old_inode = d_inode(old_dentry);
 959         struct inode *new_inode = d_inode(new_dentry);
 960         struct inode *whiteout = NULL;
 961         struct page *old_dir_page = NULL;
 962         struct page *old_page, *new_page = NULL;
 963         struct f2fs_dir_entry *old_dir_entry = NULL;
 964         struct f2fs_dir_entry *old_entry;
 965         struct f2fs_dir_entry *new_entry;
 966         int err;
 967
 968         if (unlikely(f2fs_cp_error(sbi)))
 969                 return -EIO;
 970         if (!f2fs_is_checkpoint_ready(sbi))
 971                 return -ENOSPC;
 972
 973         if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
 974                         (!projid_eq(F2FS_I(new_dir)->i_projid,
 975                         F2FS_I(old_dentry->d_inode)->i_projid)))
 976                 return -EXDEV;
 977
 978         /*
 979          * If new_inode is null, the below renaming flow will
 980          * add a link in old_dir which can convert inline_dir.
 981          * After then, if we failed to get the entry due to other
 982          * reasons like ENOMEM, we had to remove the new entry.
 983          * Instead of adding such the error handling routine, let's
 984          * simply convert first here.
 985          */
 986         if (old_dir == new_dir && !new_inode) {
 987                 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
 988                 if (err)
 989                         return err;
 990         }
 991
 992         if (flags & RENAME_WHITEOUT) {
 993                 err = f2fs_create_whiteout(idmap, old_dir, &whiteout);
 994                 if (err)
 995                         return err;
 996         }
 997
 998         err = f2fs_dquot_initialize(old_dir);
 999         if (err)
1000                 goto out;
1001
1002         err = f2fs_dquot_initialize(new_dir);
1003         if (err)
1004                 goto out;
1005
1006         if (new_inode) {
1007                 err = f2fs_dquot_initialize(new_inode);
1008                 if (err)
1009                         goto out;
1010         }
1011
1012         err = -ENOENT;
1013         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1014         if (!old_entry) {
1015                 if (IS_ERR(old_page))
1016                         err = PTR_ERR(old_page);
1017                 goto out;
1018         }
1019
1020         if (S_ISDIR(old_inode->i_mode)) {
1021                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
1022                 if (!old_dir_entry) {
1023                         if (IS_ERR(old_dir_page))
1024                                 err = PTR_ERR(old_dir_page);
1025                         goto out_old;
1026                 }
1027         }
1028
1029         if (new_inode) {
1030
1031                 err = -ENOTEMPTY;
1032                 if (old_dir_entry && !f2fs_empty_dir(new_inode))
1033                         goto out_dir;
1034
1035                 err = -ENOENT;
1036                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1037                                                 &new_page);
1038                 if (!new_entry) {
1039                         if (IS_ERR(new_page))
1040                                 err = PTR_ERR(new_page);
1041                         goto out_dir;
1042                 }
1043
1044                 f2fs_balance_fs(sbi, true);
1045
1046                 f2fs_lock_op(sbi);
1047
1048                 err = f2fs_acquire_orphan_inode(sbi);
1049                 if (err)
1050                         goto put_out_dir;
1051
1052                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1053                 new_page = NULL;
1054
1055                 inode_set_ctime_current(new_inode);
1056                 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1057                 if (old_dir_entry)
1058                         f2fs_i_links_write(new_inode, false);
1059                 f2fs_i_links_write(new_inode, false);
1060                 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1061
1062                 if (!new_inode->i_nlink)
1063                         f2fs_add_orphan_inode(new_inode);
1064                 else
1065                         f2fs_release_orphan_inode(sbi);
1066         } else {
1067                 f2fs_balance_fs(sbi, true);
1068
1069                 f2fs_lock_op(sbi);
1070
1071                 err = f2fs_add_link(new_dentry, old_inode);
1072                 if (err) {
1073                         f2fs_unlock_op(sbi);
1074                         goto out_dir;
1075                 }
1076
1077                 if (old_dir_entry)
1078                         f2fs_i_links_write(new_dir, true);
1079         }
1080
1081         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1082         if (!old_dir_entry || whiteout)
1083                 file_lost_pino(old_inode);
1084         else
1085                 /* adjust dir's i_pino to pass fsck check */
1086                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1087         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1088
1089         inode_set_ctime_current(old_inode);
1090         f2fs_mark_inode_dirty_sync(old_inode, false);
1091
1092         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1093         old_page = NULL;
1094
1095         if (whiteout) {
1096                 set_inode_flag(whiteout, FI_INC_LINK);
1097                 err = f2fs_add_link(old_dentry, whiteout);
1098                 if (err)
1099                         goto put_out_dir;
1100
1101                 spin_lock(&whiteout->i_lock);
1102                 whiteout->i_state &= ~I_LINKABLE;
1103                 spin_unlock(&whiteout->i_lock);
1104
1105                 iput(whiteout);
1106         }
1107
1108         if (old_dir_entry) {
1109                 if (old_dir != new_dir && !whiteout)
1110                         f2fs_set_link(old_inode, old_dir_entry,
1111                                                 old_dir_page, new_dir);
1112                 else
1113                         f2fs_put_page(old_dir_page, 0);
1114                 f2fs_i_links_write(old_dir, false);
1115         }
1116         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1117                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1118                 if (S_ISDIR(old_inode->i_mode))
1119                         f2fs_add_ino_entry(sbi, old_inode->i_ino,
1120                                                         TRANS_DIR_INO);
1121         }
1122
1123         f2fs_unlock_op(sbi);
1124
1125         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1126                 f2fs_sync_fs(sbi->sb, 1);
1127
1128         f2fs_update_time(sbi, REQ_TIME);
1129         return 0;
1130
1131 put_out_dir:
1132         f2fs_unlock_op(sbi);
1133         f2fs_put_page(new_page, 0);
1134 out_dir:
1135         if (old_dir_entry)
1136                 f2fs_put_page(old_dir_page, 0);
1137 out_old:
1138         f2fs_put_page(old_page, 0);
1139 out:
1140         iput(whiteout);
1141         return err;
1142 }
1143
1144 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1145                              struct inode *new_dir, struct dentry *new_dentry)
1146 {
1147         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1148         struct inode *old_inode = d_inode(old_dentry);
1149         struct inode *new_inode = d_inode(new_dentry);
1150         struct page *old_dir_page, *new_dir_page;
1151         struct page *old_page, *new_page;
1152         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1153         struct f2fs_dir_entry *old_entry, *new_entry;
1154         int old_nlink = 0, new_nlink = 0;
1155         int err;
1156
1157         if (unlikely(f2fs_cp_error(sbi)))
1158                 return -EIO;
1159         if (!f2fs_is_checkpoint_ready(sbi))
1160                 return -ENOSPC;
1161
1162         if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1163                         !projid_eq(F2FS_I(new_dir)->i_projid,
1164                         F2FS_I(old_dentry->d_inode)->i_projid)) ||
1165             (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1166                         !projid_eq(F2FS_I(old_dir)->i_projid,
1167                         F2FS_I(new_dentry->d_inode)->i_projid)))
1168                 return -EXDEV;
1169
1170         err = f2fs_dquot_initialize(old_dir);
1171         if (err)
1172                 goto out;
1173
1174         err = f2fs_dquot_initialize(new_dir);
1175         if (err)
1176                 goto out;
1177
1178         err = -ENOENT;
1179         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1180         if (!old_entry) {
1181                 if (IS_ERR(old_page))
1182                         err = PTR_ERR(old_page);
1183                 goto out;
1184         }
1185
1186         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1187         if (!new_entry) {
1188                 if (IS_ERR(new_page))
1189                         err = PTR_ERR(new_page);
1190                 goto out_old;
1191         }
1192
1193         /* prepare for updating ".." directory entry info later */
1194         if (old_dir != new_dir) {
1195                 if (S_ISDIR(old_inode->i_mode)) {
1196                         old_dir_entry = f2fs_parent_dir(old_inode,
1197                                                         &old_dir_page);
1198                         if (!old_dir_entry) {
1199                                 if (IS_ERR(old_dir_page))
1200                                         err = PTR_ERR(old_dir_page);
1201                                 goto out_new;
1202                         }
1203                 }
1204
1205                 if (S_ISDIR(new_inode->i_mode)) {
1206                         new_dir_entry = f2fs_parent_dir(new_inode,
1207                                                         &new_dir_page);
1208                         if (!new_dir_entry) {
1209                                 if (IS_ERR(new_dir_page))
1210                                         err = PTR_ERR(new_dir_page);
1211                                 goto out_old_dir;
1212                         }
1213                 }
1214         }
1215
1216         /*
1217          * If cross rename between file and directory those are not
1218          * in the same directory, we will inc nlink of file's parent
1219          * later, so we should check upper boundary of its nlink.
1220          */
1221         if ((!old_dir_entry || !new_dir_entry) &&
1222                                 old_dir_entry != new_dir_entry) {
1223                 old_nlink = old_dir_entry ? -1 : 1;
1224                 new_nlink = -old_nlink;
1225                 err = -EMLINK;
1226                 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1227                         (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1228                         goto out_new_dir;
1229         }
1230
1231         f2fs_balance_fs(sbi, true);
1232
1233         f2fs_lock_op(sbi);
1234
1235         /* update ".." directory entry info of old dentry */
1236         if (old_dir_entry)
1237                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1238
1239         /* update ".." directory entry info of new dentry */
1240         if (new_dir_entry)
1241                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1242
1243         /* update directory entry info of old dir inode */
1244         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1245
1246         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1247         if (!old_dir_entry)
1248                 file_lost_pino(old_inode);
1249         else
1250                 /* adjust dir's i_pino to pass fsck check */
1251                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1252         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1253
1254         inode_set_ctime_current(old_dir);
1255         if (old_nlink) {
1256                 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1257                 f2fs_i_links_write(old_dir, old_nlink > 0);
1258                 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1259         }
1260         f2fs_mark_inode_dirty_sync(old_dir, false);
1261
1262         /* update directory entry info of new dir inode */
1263         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1264
1265         f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1266         if (!new_dir_entry)
1267                 file_lost_pino(new_inode);
1268         else
1269                 /* adjust dir's i_pino to pass fsck check */
1270                 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1271         f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1272
1273         inode_set_ctime_current(new_dir);
1274         if (new_nlink) {
1275                 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1276                 f2fs_i_links_write(new_dir, new_nlink > 0);
1277                 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1278         }
1279         f2fs_mark_inode_dirty_sync(new_dir, false);
1280
1281         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1282                 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1283                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1284         }
1285
1286         f2fs_unlock_op(sbi);
1287
1288         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1289                 f2fs_sync_fs(sbi->sb, 1);
1290
1291         f2fs_update_time(sbi, REQ_TIME);
1292         return 0;
1293 out_new_dir:
1294         if (new_dir_entry) {
1295                 f2fs_put_page(new_dir_page, 0);
1296         }
1297 out_old_dir:
1298         if (old_dir_entry) {
1299                 f2fs_put_page(old_dir_page, 0);
1300         }
1301 out_new:
1302         f2fs_put_page(new_page, 0);
1303 out_old:
1304         f2fs_put_page(old_page, 0);
1305 out:
1306         return err;
1307 }
1308
1309 static int f2fs_rename2(struct mnt_idmap *idmap,
1310                         struct inode *old_dir, struct dentry *old_dentry,
1311                         struct inode *new_dir, struct dentry *new_dentry,
1312                         unsigned int flags)
1313 {
1314         int err;
1315
1316         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1317                 return -EINVAL;
1318
1319         err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1320                                      flags);
1321         if (err)
1322                 return err;
1323
1324         if (flags & RENAME_EXCHANGE) {
1325                 return f2fs_cross_rename(old_dir, old_dentry,
1326                                          new_dir, new_dentry);
1327         }
1328         /*
1329          * VFS has already handled the new dentry existence case,
1330          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1331          */
1332         return f2fs_rename(idmap, old_dir, old_dentry,
1333                                         new_dir, new_dentry, flags);
1334 }
1335
1336 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1337                                            struct inode *inode,
1338                                            struct delayed_call *done)
1339 {
1340         struct page *page;
1341         const char *target;
1342
1343         if (!dentry)
1344                 return ERR_PTR(-ECHILD);
1345
1346         page = read_mapping_page(inode->i_mapping, 0, NULL);
1347         if (IS_ERR(page))
1348                 return ERR_CAST(page);
1349
1350         target = fscrypt_get_symlink(inode, page_address(page),
1351                                      inode->i_sb->s_blocksize, done);
1352         put_page(page);
1353         return target;
1354 }
1355
1356 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1357                                           const struct path *path,
1358                                           struct kstat *stat, u32 request_mask,
1359                                           unsigned int query_flags)
1360 {
1361         f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1362
1363         return fscrypt_symlink_getattr(path, stat);
1364 }
1365
1366 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1367         .get_link       = f2fs_encrypted_get_link,
1368         .getattr        = f2fs_encrypted_symlink_getattr,
1369         .setattr        = f2fs_setattr,
1370         .listxattr      = f2fs_listxattr,
1371 };
1372
1373 const struct inode_operations f2fs_dir_inode_operations = {
1374         .create         = f2fs_create,
1375         .lookup         = f2fs_lookup,
1376         .link           = f2fs_link,
1377         .unlink         = f2fs_unlink,
1378         .symlink        = f2fs_symlink,
1379         .mkdir          = f2fs_mkdir,
1380         .rmdir          = f2fs_rmdir,
1381         .mknod          = f2fs_mknod,
1382         .rename         = f2fs_rename2,
1383         .tmpfile        = f2fs_tmpfile,
1384         .getattr        = f2fs_getattr,
1385         .setattr        = f2fs_setattr,
1386         .get_inode_acl  = f2fs_get_acl,
1387         .set_acl        = f2fs_set_acl,
1388         .listxattr      = f2fs_listxattr,
1389         .fiemap         = f2fs_fiemap,
1390         .fileattr_get   = f2fs_fileattr_get,
1391         .fileattr_set   = f2fs_fileattr_set,
1392 };
1393
1394 const struct inode_operations f2fs_symlink_inode_operations = {
1395         .get_link       = f2fs_get_link,
1396         .getattr        = f2fs_getattr,
1397         .setattr        = f2fs_setattr,
1398         .listxattr      = f2fs_listxattr,
1399 };
1400
1401 const struct inode_operations f2fs_special_inode_operations = {
1402         .getattr        = f2fs_getattr,
1403         .setattr        = f2fs_setattr,
1404         .get_inode_acl  = f2fs_get_acl,
1405         .set_acl        = f2fs_set_acl,
1406         .listxattr      = f2fs_listxattr,
1407 };