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 f2fs_dir_entry *de;
 463         struct page *page;
 464         int err = 0;
 465
 466         if (f2fs_readonly(sbi->sb)) {
 467                 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
 468                           dir->i_ino, pino);
 469                 return 0;
 470         }
 471
 472         if (!S_ISDIR(dir->i_mode)) {
 473                 f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)",
 474                           dir->i_ino, dir->i_mode, pino);
 475                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 476                 return -ENOTDIR;
 477         }
 478
 479         err = f2fs_dquot_initialize(dir);
 480         if (err)
 481                 return err;
 482
 483         f2fs_balance_fs(sbi, true);
 484
 485         f2fs_lock_op(sbi);
 486
 487         de = f2fs_find_entry(dir, &dot, &page);
 488         if (de) {
 489                 f2fs_put_page(page, 0);
 490         } else if (IS_ERR(page)) {
 491                 err = PTR_ERR(page);
 492                 goto out;
 493         } else {
 494                 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
 495                 if (err)
 496                         goto out;
 497         }
 498
 499         de = f2fs_find_entry(dir, &dotdot_name, &page);
 500         if (de)
 501                 f2fs_put_page(page, 0);
 502         else if (IS_ERR(page))
 503                 err = PTR_ERR(page);
 504         else
 505                 err = f2fs_do_add_link(dir, &dotdot_name, NULL, pino, S_IFDIR);
 506 out:
 507         if (!err)
 508                 clear_inode_flag(dir, FI_INLINE_DOTS);
 509
 510         f2fs_unlock_op(sbi);
 511         return err;
 512 }
 513
 514 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 515                 unsigned int flags)
 516 {
 517         struct inode *inode = NULL;
 518         struct f2fs_dir_entry *de;
 519         struct page *page;
 520         struct dentry *new;
 521         nid_t ino = -1;
 522         int err = 0;
 523         unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
 524         struct f2fs_filename fname;
 525
 526         trace_f2fs_lookup_start(dir, dentry, flags);
 527
 528         if (dentry->d_name.len > F2FS_NAME_LEN) {
 529                 err = -ENAMETOOLONG;
 530                 goto out;
 531         }
 532
 533         err = f2fs_prepare_lookup(dir, dentry, &fname);
 534         if (err == -ENOENT)
 535                 goto out_splice;
 536         if (err)
 537                 goto out;
 538         de = __f2fs_find_entry(dir, &fname, &page);
 539         f2fs_free_filename(&fname);
 540
 541         if (!de) {
 542                 if (IS_ERR(page)) {
 543                         err = PTR_ERR(page);
 544                         goto out;
 545                 }
 546                 err = -ENOENT;
 547                 goto out_splice;
 548         }
 549
 550         ino = le32_to_cpu(de->ino);
 551         f2fs_put_page(page, 0);
 552
 553         inode = f2fs_iget(dir->i_sb, ino);
 554         if (IS_ERR(inode)) {
 555                 err = PTR_ERR(inode);
 556                 goto out;
 557         }
 558
 559         if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
 560                 err = __recover_dot_dentries(dir, root_ino);
 561                 if (err)
 562                         goto out_iput;
 563         }
 564
 565         if (f2fs_has_inline_dots(inode)) {
 566                 err = __recover_dot_dentries(inode, dir->i_ino);
 567                 if (err)
 568                         goto out_iput;
 569         }
 570         if (IS_ENCRYPTED(dir) &&
 571             (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 572             !fscrypt_has_permitted_context(dir, inode)) {
 573                 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
 574                           dir->i_ino, inode->i_ino);
 575                 err = -EPERM;
 576                 goto out_iput;
 577         }
 578 out_splice:
 579 #if IS_ENABLED(CONFIG_UNICODE)
 580         if (!inode && IS_CASEFOLDED(dir)) {
 581                 /* Eventually we want to call d_add_ci(dentry, NULL)
 582                  * for negative dentries in the encoding case as
 583                  * well.  For now, prevent the negative dentry
 584                  * from being cached.
 585                  */
 586                 trace_f2fs_lookup_end(dir, dentry, ino, err);
 587                 return NULL;
 588         }
 589 #endif
 590         new = d_splice_alias(inode, dentry);
 591         trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
 592                                 ino, IS_ERR(new) ? PTR_ERR(new) : err);
 593         return new;
 594 out_iput:
 595         iput(inode);
 596 out:
 597         trace_f2fs_lookup_end(dir, dentry, ino, err);
 598         return ERR_PTR(err);
 599 }
 600
 601 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 602 {
 603         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 604         struct inode *inode = d_inode(dentry);
 605         struct f2fs_dir_entry *de;
 606         struct page *page;
 607         int err;
 608
 609         trace_f2fs_unlink_enter(dir, dentry);
 610
 611         if (unlikely(f2fs_cp_error(sbi))) {
 612                 err = -EIO;
 613                 goto fail;
 614         }
 615
 616         err = f2fs_dquot_initialize(dir);
 617         if (err)
 618                 goto fail;
 619         err = f2fs_dquot_initialize(inode);
 620         if (err)
 621                 goto fail;
 622
 623         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 624         if (!de) {
 625                 if (IS_ERR(page))
 626                         err = PTR_ERR(page);
 627                 goto fail;
 628         }
 629
 630         f2fs_balance_fs(sbi, true);
 631
 632         f2fs_lock_op(sbi);
 633         err = f2fs_acquire_orphan_inode(sbi);
 634         if (err) {
 635                 f2fs_unlock_op(sbi);
 636                 f2fs_put_page(page, 0);
 637                 goto fail;
 638         }
 639         f2fs_delete_entry(de, page, dir, inode);
 640         f2fs_unlock_op(sbi);
 641
 642 #if IS_ENABLED(CONFIG_UNICODE)
 643         /* VFS negative dentries are incompatible with Encoding and
 644          * Case-insensitiveness. Eventually we'll want avoid
 645          * invalidating the dentries here, alongside with returning the
 646          * negative dentries at f2fs_lookup(), when it is better
 647          * supported by the VFS for the CI case.
 648          */
 649         if (IS_CASEFOLDED(dir))
 650                 d_invalidate(dentry);
 651 #endif
 652         if (IS_DIRSYNC(dir))
 653                 f2fs_sync_fs(sbi->sb, 1);
 654 fail:
 655         trace_f2fs_unlink_exit(inode, err);
 656         return err;
 657 }
 658
 659 static const char *f2fs_get_link(struct dentry *dentry,
 660                                  struct inode *inode,
 661                                  struct delayed_call *done)
 662 {
 663         const char *link = page_get_link(dentry, inode, done);
 664
 665         if (!IS_ERR(link) && !*link) {
 666                 /* this is broken symlink case */
 667                 do_delayed_call(done);
 668                 clear_delayed_call(done);
 669                 link = ERR_PTR(-ENOENT);
 670         }
 671         return link;
 672 }
 673
 674 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
 675                         struct dentry *dentry, const char *symname)
 676 {
 677         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 678         struct inode *inode;
 679         size_t len = strlen(symname);
 680         struct fscrypt_str disk_link;
 681         int err;
 682
 683         if (unlikely(f2fs_cp_error(sbi)))
 684                 return -EIO;
 685         if (!f2fs_is_checkpoint_ready(sbi))
 686                 return -ENOSPC;
 687
 688         err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
 689                                       &disk_link);
 690         if (err)
 691                 return err;
 692
 693         err = f2fs_dquot_initialize(dir);
 694         if (err)
 695                 return err;
 696
 697         inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
 698         if (IS_ERR(inode))
 699                 return PTR_ERR(inode);
 700
 701         if (IS_ENCRYPTED(inode))
 702                 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 703         else
 704                 inode->i_op = &f2fs_symlink_inode_operations;
 705         inode_nohighmem(inode);
 706         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 707
 708         f2fs_lock_op(sbi);
 709         err = f2fs_add_link(dentry, inode);
 710         if (err)
 711                 goto out_f2fs_handle_failed_inode;
 712         f2fs_unlock_op(sbi);
 713         f2fs_alloc_nid_done(sbi, inode->i_ino);
 714
 715         err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
 716         if (err)
 717                 goto err_out;
 718
 719         err = page_symlink(inode, disk_link.name, disk_link.len);
 720
 721 err_out:
 722         d_instantiate_new(dentry, inode);
 723
 724         /*
 725          * Let's flush symlink data in order to avoid broken symlink as much as
 726          * possible. Nevertheless, fsyncing is the best way, but there is no
 727          * way to get a file descriptor in order to flush that.
 728          *
 729          * Note that, it needs to do dir->fsync to make this recoverable.
 730          * If the symlink path is stored into inline_data, there is no
 731          * performance regression.
 732          */
 733         if (!err) {
 734                 filemap_write_and_wait_range(inode->i_mapping, 0,
 735                                                         disk_link.len - 1);
 736
 737                 if (IS_DIRSYNC(dir))
 738                         f2fs_sync_fs(sbi->sb, 1);
 739         } else {
 740                 f2fs_unlink(dir, dentry);
 741         }
 742
 743         f2fs_balance_fs(sbi, true);
 744         goto out_free_encrypted_link;
 745
 746 out_f2fs_handle_failed_inode:
 747         f2fs_handle_failed_inode(inode);
 748 out_free_encrypted_link:
 749         if (disk_link.name != (unsigned char *)symname)
 750                 kfree(disk_link.name);
 751         return err;
 752 }
 753
 754 static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
 755                       struct dentry *dentry, umode_t mode)
 756 {
 757         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 758         struct inode *inode;
 759         int err;
 760
 761         if (unlikely(f2fs_cp_error(sbi)))
 762                 return -EIO;
 763
 764         err = f2fs_dquot_initialize(dir);
 765         if (err)
 766                 return err;
 767
 768         inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
 769         if (IS_ERR(inode))
 770                 return PTR_ERR(inode);
 771
 772         inode->i_op = &f2fs_dir_inode_operations;
 773         inode->i_fop = &f2fs_dir_operations;
 774         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 775         mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 776
 777         set_inode_flag(inode, FI_INC_LINK);
 778         f2fs_lock_op(sbi);
 779         err = f2fs_add_link(dentry, inode);
 780         if (err)
 781                 goto out_fail;
 782         f2fs_unlock_op(sbi);
 783
 784         f2fs_alloc_nid_done(sbi, inode->i_ino);
 785
 786         d_instantiate_new(dentry, inode);
 787
 788         if (IS_DIRSYNC(dir))
 789                 f2fs_sync_fs(sbi->sb, 1);
 790
 791         f2fs_balance_fs(sbi, true);
 792         return 0;
 793
 794 out_fail:
 795         clear_inode_flag(inode, FI_INC_LINK);
 796         f2fs_handle_failed_inode(inode);
 797         return err;
 798 }
 799
 800 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 801 {
 802         struct inode *inode = d_inode(dentry);
 803
 804         if (f2fs_empty_dir(inode))
 805                 return f2fs_unlink(dir, dentry);
 806         return -ENOTEMPTY;
 807 }
 808
 809 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
 810                       struct dentry *dentry, umode_t mode, dev_t rdev)
 811 {
 812         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 813         struct inode *inode;
 814         int err = 0;
 815
 816         if (unlikely(f2fs_cp_error(sbi)))
 817                 return -EIO;
 818         if (!f2fs_is_checkpoint_ready(sbi))
 819                 return -ENOSPC;
 820
 821         err = f2fs_dquot_initialize(dir);
 822         if (err)
 823                 return err;
 824
 825         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 826         if (IS_ERR(inode))
 827                 return PTR_ERR(inode);
 828
 829         init_special_inode(inode, inode->i_mode, rdev);
 830         inode->i_op = &f2fs_special_inode_operations;
 831
 832         f2fs_lock_op(sbi);
 833         err = f2fs_add_link(dentry, inode);
 834         if (err)
 835                 goto out;
 836         f2fs_unlock_op(sbi);
 837
 838         f2fs_alloc_nid_done(sbi, inode->i_ino);
 839
 840         d_instantiate_new(dentry, inode);
 841
 842         if (IS_DIRSYNC(dir))
 843                 f2fs_sync_fs(sbi->sb, 1);
 844
 845         f2fs_balance_fs(sbi, true);
 846         return 0;
 847 out:
 848         f2fs_handle_failed_inode(inode);
 849         return err;
 850 }
 851
 852 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 853                           struct file *file, umode_t mode, bool is_whiteout,
 854                           struct inode **new_inode, struct f2fs_filename *fname)
 855 {
 856         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 857         struct inode *inode;
 858         int err;
 859
 860         err = f2fs_dquot_initialize(dir);
 861         if (err)
 862                 return err;
 863
 864         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 865         if (IS_ERR(inode))
 866                 return PTR_ERR(inode);
 867
 868         if (is_whiteout) {
 869                 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
 870                 inode->i_op = &f2fs_special_inode_operations;
 871         } else {
 872                 inode->i_op = &f2fs_file_inode_operations;
 873                 inode->i_fop = &f2fs_file_operations;
 874                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 875         }
 876
 877         f2fs_lock_op(sbi);
 878         err = f2fs_acquire_orphan_inode(sbi);
 879         if (err)
 880                 goto out;
 881
 882         err = f2fs_do_tmpfile(inode, dir, fname);
 883         if (err)
 884                 goto release_out;
 885
 886         /*
 887          * add this non-linked tmpfile to orphan list, in this way we could
 888          * remove all unused data of tmpfile after abnormal power-off.
 889          */
 890         f2fs_add_orphan_inode(inode);
 891         f2fs_alloc_nid_done(sbi, inode->i_ino);
 892
 893         if (is_whiteout) {
 894                 f2fs_i_links_write(inode, false);
 895
 896                 spin_lock(&inode->i_lock);
 897                 inode->i_state |= I_LINKABLE;
 898                 spin_unlock(&inode->i_lock);
 899         } else {
 900                 if (file)
 901                         d_tmpfile(file, inode);
 902                 else
 903                         f2fs_i_links_write(inode, false);
 904         }
 905         /* link_count was changed by d_tmpfile as well. */
 906         f2fs_unlock_op(sbi);
 907         unlock_new_inode(inode);
 908
 909         if (new_inode)
 910                 *new_inode = inode;
 911
 912         f2fs_balance_fs(sbi, true);
 913         return 0;
 914
 915 release_out:
 916         f2fs_release_orphan_inode(sbi);
 917 out:
 918         f2fs_handle_failed_inode(inode);
 919         return err;
 920 }
 921
 922 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 923                         struct file *file, umode_t mode)
 924 {
 925         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 926         int err;
 927
 928         if (unlikely(f2fs_cp_error(sbi)))
 929                 return -EIO;
 930         if (!f2fs_is_checkpoint_ready(sbi))
 931                 return -ENOSPC;
 932
 933         err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
 934
 935         return finish_open_simple(file, err);
 936 }
 937
 938 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
 939                                 struct inode *dir, struct inode **whiteout,
 940                                 struct f2fs_filename *fname)
 941 {
 942         return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
 943                                                 true, whiteout, fname);
 944 }
 945
 946 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 947                      struct inode **new_inode)
 948 {
 949         return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
 950                                 false, new_inode, NULL);
 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         bool old_is_dir = S_ISDIR(old_inode->i_mode);
 967         int err;
 968
 969         if (unlikely(f2fs_cp_error(sbi)))
 970                 return -EIO;
 971         if (!f2fs_is_checkpoint_ready(sbi))
 972                 return -ENOSPC;
 973
 974         if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
 975                         (!projid_eq(F2FS_I(new_dir)->i_projid,
 976                         F2FS_I(old_dentry->d_inode)->i_projid)))
 977                 return -EXDEV;
 978
 979         /*
 980          * If new_inode is null, the below renaming flow will
 981          * add a link in old_dir which can convert inline_dir.
 982          * After then, if we failed to get the entry due to other
 983          * reasons like ENOMEM, we had to remove the new entry.
 984          * Instead of adding such the error handling routine, let's
 985          * simply convert first here.
 986          */
 987         if (old_dir == new_dir && !new_inode) {
 988                 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
 989                 if (err)
 990                         return err;
 991         }
 992
 993         if (flags & RENAME_WHITEOUT) {
 994                 struct f2fs_filename fname;
 995
 996                 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
 997                                                         0, &fname);
 998                 if (err)
 999                         return err;
1000
1001                 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
1002                 if (err)
1003                         return err;
1004         }
1005
1006         err = f2fs_dquot_initialize(old_dir);
1007         if (err)
1008                 goto out;
1009
1010         err = f2fs_dquot_initialize(new_dir);
1011         if (err)
1012                 goto out;
1013
1014         if (new_inode) {
1015                 err = f2fs_dquot_initialize(new_inode);
1016                 if (err)
1017                         goto out;
1018         }
1019
1020         err = -ENOENT;
1021         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1022         if (!old_entry) {
1023                 if (IS_ERR(old_page))
1024                         err = PTR_ERR(old_page);
1025                 goto out;
1026         }
1027
1028         if (old_is_dir && old_dir != new_dir) {
1029                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
1030                 if (!old_dir_entry) {
1031                         if (IS_ERR(old_dir_page))
1032                                 err = PTR_ERR(old_dir_page);
1033                         goto out_old;
1034                 }
1035         }
1036
1037         if (new_inode) {
1038
1039                 err = -ENOTEMPTY;
1040                 if (old_is_dir && !f2fs_empty_dir(new_inode))
1041                         goto out_dir;
1042
1043                 err = -ENOENT;
1044                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1045                                                 &new_page);
1046                 if (!new_entry) {
1047                         if (IS_ERR(new_page))
1048                                 err = PTR_ERR(new_page);
1049                         goto out_dir;
1050                 }
1051
1052                 f2fs_balance_fs(sbi, true);
1053
1054                 f2fs_lock_op(sbi);
1055
1056                 err = f2fs_acquire_orphan_inode(sbi);
1057                 if (err)
1058                         goto put_out_dir;
1059
1060                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1061                 new_page = NULL;
1062
1063                 inode_set_ctime_current(new_inode);
1064                 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1065                 if (old_is_dir)
1066                         f2fs_i_links_write(new_inode, false);
1067                 f2fs_i_links_write(new_inode, false);
1068                 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1069
1070                 if (!new_inode->i_nlink)
1071                         f2fs_add_orphan_inode(new_inode);
1072                 else
1073                         f2fs_release_orphan_inode(sbi);
1074         } else {
1075                 f2fs_balance_fs(sbi, true);
1076
1077                 f2fs_lock_op(sbi);
1078
1079                 err = f2fs_add_link(new_dentry, old_inode);
1080                 if (err) {
1081                         f2fs_unlock_op(sbi);
1082                         goto out_dir;
1083                 }
1084
1085                 if (old_is_dir)
1086                         f2fs_i_links_write(new_dir, true);
1087         }
1088
1089         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1090         if (!old_is_dir || whiteout)
1091                 file_lost_pino(old_inode);
1092         else
1093                 /* adjust dir's i_pino to pass fsck check */
1094                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1095         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1096
1097         inode_set_ctime_current(old_inode);
1098         f2fs_mark_inode_dirty_sync(old_inode, false);
1099
1100         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1101         old_page = NULL;
1102
1103         if (whiteout) {
1104                 set_inode_flag(whiteout, FI_INC_LINK);
1105                 err = f2fs_add_link(old_dentry, whiteout);
1106                 if (err)
1107                         goto put_out_dir;
1108
1109                 spin_lock(&whiteout->i_lock);
1110                 whiteout->i_state &= ~I_LINKABLE;
1111                 spin_unlock(&whiteout->i_lock);
1112
1113                 iput(whiteout);
1114         }
1115
1116         if (old_dir_entry)
1117                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1118         if (old_is_dir)
1119                 f2fs_i_links_write(old_dir, false);
1120
1121         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1122                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1123                 if (S_ISDIR(old_inode->i_mode))
1124                         f2fs_add_ino_entry(sbi, old_inode->i_ino,
1125                                                         TRANS_DIR_INO);
1126         }
1127
1128         f2fs_unlock_op(sbi);
1129
1130         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1131                 f2fs_sync_fs(sbi->sb, 1);
1132
1133         f2fs_update_time(sbi, REQ_TIME);
1134         return 0;
1135
1136 put_out_dir:
1137         f2fs_unlock_op(sbi);
1138         f2fs_put_page(new_page, 0);
1139 out_dir:
1140         if (old_dir_entry)
1141                 f2fs_put_page(old_dir_page, 0);
1142 out_old:
1143         f2fs_put_page(old_page, 0);
1144 out:
1145         iput(whiteout);
1146         return err;
1147 }
1148
1149 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1150                              struct inode *new_dir, struct dentry *new_dentry)
1151 {
1152         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1153         struct inode *old_inode = d_inode(old_dentry);
1154         struct inode *new_inode = d_inode(new_dentry);
1155         struct page *old_dir_page, *new_dir_page;
1156         struct page *old_page, *new_page;
1157         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1158         struct f2fs_dir_entry *old_entry, *new_entry;
1159         int old_nlink = 0, new_nlink = 0;
1160         int err;
1161
1162         if (unlikely(f2fs_cp_error(sbi)))
1163                 return -EIO;
1164         if (!f2fs_is_checkpoint_ready(sbi))
1165                 return -ENOSPC;
1166
1167         if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1168                         !projid_eq(F2FS_I(new_dir)->i_projid,
1169                         F2FS_I(old_dentry->d_inode)->i_projid)) ||
1170             (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1171                         !projid_eq(F2FS_I(old_dir)->i_projid,
1172                         F2FS_I(new_dentry->d_inode)->i_projid)))
1173                 return -EXDEV;
1174
1175         err = f2fs_dquot_initialize(old_dir);
1176         if (err)
1177                 goto out;
1178
1179         err = f2fs_dquot_initialize(new_dir);
1180         if (err)
1181                 goto out;
1182
1183         err = -ENOENT;
1184         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1185         if (!old_entry) {
1186                 if (IS_ERR(old_page))
1187                         err = PTR_ERR(old_page);
1188                 goto out;
1189         }
1190
1191         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1192         if (!new_entry) {
1193                 if (IS_ERR(new_page))
1194                         err = PTR_ERR(new_page);
1195                 goto out_old;
1196         }
1197
1198         /* prepare for updating ".." directory entry info later */
1199         if (old_dir != new_dir) {
1200                 if (S_ISDIR(old_inode->i_mode)) {
1201                         old_dir_entry = f2fs_parent_dir(old_inode,
1202                                                         &old_dir_page);
1203                         if (!old_dir_entry) {
1204                                 if (IS_ERR(old_dir_page))
1205                                         err = PTR_ERR(old_dir_page);
1206                                 goto out_new;
1207                         }
1208                 }
1209
1210                 if (S_ISDIR(new_inode->i_mode)) {
1211                         new_dir_entry = f2fs_parent_dir(new_inode,
1212                                                         &new_dir_page);
1213                         if (!new_dir_entry) {
1214                                 if (IS_ERR(new_dir_page))
1215                                         err = PTR_ERR(new_dir_page);
1216                                 goto out_old_dir;
1217                         }
1218                 }
1219         }
1220
1221         /*
1222          * If cross rename between file and directory those are not
1223          * in the same directory, we will inc nlink of file's parent
1224          * later, so we should check upper boundary of its nlink.
1225          */
1226         if ((!old_dir_entry || !new_dir_entry) &&
1227                                 old_dir_entry != new_dir_entry) {
1228                 old_nlink = old_dir_entry ? -1 : 1;
1229                 new_nlink = -old_nlink;
1230                 err = -EMLINK;
1231                 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1232                         (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1233                         goto out_new_dir;
1234         }
1235
1236         f2fs_balance_fs(sbi, true);
1237
1238         f2fs_lock_op(sbi);
1239
1240         /* update ".." directory entry info of old dentry */
1241         if (old_dir_entry)
1242                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1243
1244         /* update ".." directory entry info of new dentry */
1245         if (new_dir_entry)
1246                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1247
1248         /* update directory entry info of old dir inode */
1249         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1250
1251         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1252         if (!old_dir_entry)
1253                 file_lost_pino(old_inode);
1254         else
1255                 /* adjust dir's i_pino to pass fsck check */
1256                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1257         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1258
1259         inode_set_ctime_current(old_dir);
1260         if (old_nlink) {
1261                 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1262                 f2fs_i_links_write(old_dir, old_nlink > 0);
1263                 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1264         }
1265         f2fs_mark_inode_dirty_sync(old_dir, false);
1266
1267         /* update directory entry info of new dir inode */
1268         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1269
1270         f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1271         if (!new_dir_entry)
1272                 file_lost_pino(new_inode);
1273         else
1274                 /* adjust dir's i_pino to pass fsck check */
1275                 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1276         f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1277
1278         inode_set_ctime_current(new_dir);
1279         if (new_nlink) {
1280                 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1281                 f2fs_i_links_write(new_dir, new_nlink > 0);
1282                 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1283         }
1284         f2fs_mark_inode_dirty_sync(new_dir, false);
1285
1286         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1287                 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1288                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1289         }
1290
1291         f2fs_unlock_op(sbi);
1292
1293         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1294                 f2fs_sync_fs(sbi->sb, 1);
1295
1296         f2fs_update_time(sbi, REQ_TIME);
1297         return 0;
1298 out_new_dir:
1299         if (new_dir_entry) {
1300                 f2fs_put_page(new_dir_page, 0);
1301         }
1302 out_old_dir:
1303         if (old_dir_entry) {
1304                 f2fs_put_page(old_dir_page, 0);
1305         }
1306 out_new:
1307         f2fs_put_page(new_page, 0);
1308 out_old:
1309         f2fs_put_page(old_page, 0);
1310 out:
1311         return err;
1312 }
1313
1314 static int f2fs_rename2(struct mnt_idmap *idmap,
1315                         struct inode *old_dir, struct dentry *old_dentry,
1316                         struct inode *new_dir, struct dentry *new_dentry,
1317                         unsigned int flags)
1318 {
1319         int err;
1320
1321         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1322                 return -EINVAL;
1323
1324         trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1325                                                                 flags);
1326
1327         err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1328                                      flags);
1329         if (err)
1330                 return err;
1331
1332         if (flags & RENAME_EXCHANGE)
1333                 err = f2fs_cross_rename(old_dir, old_dentry,
1334                                         new_dir, new_dentry);
1335         else
1336         /*
1337          * VFS has already handled the new dentry existence case,
1338          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1339          */
1340                 err = f2fs_rename(idmap, old_dir, old_dentry,
1341                                         new_dir, new_dentry, flags);
1342
1343         trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1344         return err;
1345 }
1346
1347 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1348                                            struct inode *inode,
1349                                            struct delayed_call *done)
1350 {
1351         struct page *page;
1352         const char *target;
1353
1354         if (!dentry)
1355                 return ERR_PTR(-ECHILD);
1356
1357         page = read_mapping_page(inode->i_mapping, 0, NULL);
1358         if (IS_ERR(page))
1359                 return ERR_CAST(page);
1360
1361         target = fscrypt_get_symlink(inode, page_address(page),
1362                                      inode->i_sb->s_blocksize, done);
1363         put_page(page);
1364         return target;
1365 }
1366
1367 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1368                                           const struct path *path,
1369                                           struct kstat *stat, u32 request_mask,
1370                                           unsigned int query_flags)
1371 {
1372         f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1373
1374         return fscrypt_symlink_getattr(path, stat);
1375 }
1376
1377 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1378         .get_link       = f2fs_encrypted_get_link,
1379         .getattr        = f2fs_encrypted_symlink_getattr,
1380         .setattr        = f2fs_setattr,
1381         .listxattr      = f2fs_listxattr,
1382 };
1383
1384 const struct inode_operations f2fs_dir_inode_operations = {
1385         .create         = f2fs_create,
1386         .lookup         = f2fs_lookup,
1387         .link           = f2fs_link,
1388         .unlink         = f2fs_unlink,
1389         .symlink        = f2fs_symlink,
1390         .mkdir          = f2fs_mkdir,
1391         .rmdir          = f2fs_rmdir,
1392         .mknod          = f2fs_mknod,
1393         .rename         = f2fs_rename2,
1394         .tmpfile        = f2fs_tmpfile,
1395         .getattr        = f2fs_getattr,
1396         .setattr        = f2fs_setattr,
1397         .get_inode_acl  = f2fs_get_acl,
1398         .set_acl        = f2fs_set_acl,
1399         .listxattr      = f2fs_listxattr,
1400         .fiemap         = f2fs_fiemap,
1401         .fileattr_get   = f2fs_fileattr_get,
1402         .fileattr_set   = f2fs_fileattr_set,
1403 };
1404
1405 const struct inode_operations f2fs_symlink_inode_operations = {
1406         .get_link       = f2fs_get_link,
1407         .getattr        = f2fs_getattr,
1408         .setattr        = f2fs_setattr,
1409         .listxattr      = f2fs_listxattr,
1410 };
1411
1412 const struct inode_operations f2fs_special_inode_operations = {
1413         .getattr        = f2fs_getattr,
1414         .setattr        = f2fs_setattr,
1415         .get_inode_acl  = f2fs_get_acl,
1416         .set_acl        = f2fs_set_acl,
1417         .listxattr      = f2fs_listxattr,
1418 };