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         generic_set_encrypted_ci_d_ops(dentry);
 535         if (err == -ENOENT)
 536                 goto out_splice;
 537         if (err)
 538                 goto out;
 539         de = __f2fs_find_entry(dir, &fname, &page);
 540         f2fs_free_filename(&fname);
 541
 542         if (!de) {
 543                 if (IS_ERR(page)) {
 544                         err = PTR_ERR(page);
 545                         goto out;
 546                 }
 547                 err = -ENOENT;
 548                 goto out_splice;
 549         }
 550
 551         ino = le32_to_cpu(de->ino);
 552         f2fs_put_page(page, 0);
 553
 554         inode = f2fs_iget(dir->i_sb, ino);
 555         if (IS_ERR(inode)) {
 556                 err = PTR_ERR(inode);
 557                 goto out;
 558         }
 559
 560         if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
 561                 err = __recover_dot_dentries(dir, root_ino);
 562                 if (err)
 563                         goto out_iput;
 564         }
 565
 566         if (f2fs_has_inline_dots(inode)) {
 567                 err = __recover_dot_dentries(inode, dir->i_ino);
 568                 if (err)
 569                         goto out_iput;
 570         }
 571         if (IS_ENCRYPTED(dir) &&
 572             (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 573             !fscrypt_has_permitted_context(dir, inode)) {
 574                 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
 575                           dir->i_ino, inode->i_ino);
 576                 err = -EPERM;
 577                 goto out_iput;
 578         }
 579 out_splice:
 580 #if IS_ENABLED(CONFIG_UNICODE)
 581         if (!inode && IS_CASEFOLDED(dir)) {
 582                 /* Eventually we want to call d_add_ci(dentry, NULL)
 583                  * for negative dentries in the encoding case as
 584                  * well.  For now, prevent the negative dentry
 585                  * from being cached.
 586                  */
 587                 trace_f2fs_lookup_end(dir, dentry, ino, err);
 588                 return NULL;
 589         }
 590 #endif
 591         new = d_splice_alias(inode, dentry);
 592         trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
 593                                 ino, IS_ERR(new) ? PTR_ERR(new) : err);
 594         return new;
 595 out_iput:
 596         iput(inode);
 597 out:
 598         trace_f2fs_lookup_end(dir, dentry, ino, err);
 599         return ERR_PTR(err);
 600 }
 601
 602 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 603 {
 604         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 605         struct inode *inode = d_inode(dentry);
 606         struct f2fs_dir_entry *de;
 607         struct page *page;
 608         int err;
 609
 610         trace_f2fs_unlink_enter(dir, dentry);
 611
 612         if (unlikely(f2fs_cp_error(sbi))) {
 613                 err = -EIO;
 614                 goto fail;
 615         }
 616
 617         err = f2fs_dquot_initialize(dir);
 618         if (err)
 619                 goto fail;
 620         err = f2fs_dquot_initialize(inode);
 621         if (err)
 622                 goto fail;
 623
 624         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 625         if (!de) {
 626                 if (IS_ERR(page))
 627                         err = PTR_ERR(page);
 628                 goto fail;
 629         }
 630
 631         f2fs_balance_fs(sbi, true);
 632
 633         f2fs_lock_op(sbi);
 634         err = f2fs_acquire_orphan_inode(sbi);
 635         if (err) {
 636                 f2fs_unlock_op(sbi);
 637                 f2fs_put_page(page, 0);
 638                 goto fail;
 639         }
 640         f2fs_delete_entry(de, page, dir, inode);
 641         f2fs_unlock_op(sbi);
 642
 643 #if IS_ENABLED(CONFIG_UNICODE)
 644         /* VFS negative dentries are incompatible with Encoding and
 645          * Case-insensitiveness. Eventually we'll want avoid
 646          * invalidating the dentries here, alongside with returning the
 647          * negative dentries at f2fs_lookup(), when it is better
 648          * supported by the VFS for the CI case.
 649          */
 650         if (IS_CASEFOLDED(dir))
 651                 d_invalidate(dentry);
 652 #endif
 653         if (IS_DIRSYNC(dir))
 654                 f2fs_sync_fs(sbi->sb, 1);
 655 fail:
 656         trace_f2fs_unlink_exit(inode, err);
 657         return err;
 658 }
 659
 660 static const char *f2fs_get_link(struct dentry *dentry,
 661                                  struct inode *inode,
 662                                  struct delayed_call *done)
 663 {
 664         const char *link = page_get_link(dentry, inode, done);
 665
 666         if (!IS_ERR(link) && !*link) {
 667                 /* this is broken symlink case */
 668                 do_delayed_call(done);
 669                 clear_delayed_call(done);
 670                 link = ERR_PTR(-ENOENT);
 671         }
 672         return link;
 673 }
 674
 675 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
 676                         struct dentry *dentry, const char *symname)
 677 {
 678         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 679         struct inode *inode;
 680         size_t len = strlen(symname);
 681         struct fscrypt_str disk_link;
 682         int err;
 683
 684         if (unlikely(f2fs_cp_error(sbi)))
 685                 return -EIO;
 686         if (!f2fs_is_checkpoint_ready(sbi))
 687                 return -ENOSPC;
 688
 689         err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
 690                                       &disk_link);
 691         if (err)
 692                 return err;
 693
 694         err = f2fs_dquot_initialize(dir);
 695         if (err)
 696                 return err;
 697
 698         inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
 699         if (IS_ERR(inode))
 700                 return PTR_ERR(inode);
 701
 702         if (IS_ENCRYPTED(inode))
 703                 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 704         else
 705                 inode->i_op = &f2fs_symlink_inode_operations;
 706         inode_nohighmem(inode);
 707         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 708
 709         f2fs_lock_op(sbi);
 710         err = f2fs_add_link(dentry, inode);
 711         if (err)
 712                 goto out_f2fs_handle_failed_inode;
 713         f2fs_unlock_op(sbi);
 714         f2fs_alloc_nid_done(sbi, inode->i_ino);
 715
 716         err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
 717         if (err)
 718                 goto err_out;
 719
 720         err = page_symlink(inode, disk_link.name, disk_link.len);
 721
 722 err_out:
 723         d_instantiate_new(dentry, inode);
 724
 725         /*
 726          * Let's flush symlink data in order to avoid broken symlink as much as
 727          * possible. Nevertheless, fsyncing is the best way, but there is no
 728          * way to get a file descriptor in order to flush that.
 729          *
 730          * Note that, it needs to do dir->fsync to make this recoverable.
 731          * If the symlink path is stored into inline_data, there is no
 732          * performance regression.
 733          */
 734         if (!err) {
 735                 filemap_write_and_wait_range(inode->i_mapping, 0,
 736                                                         disk_link.len - 1);
 737
 738                 if (IS_DIRSYNC(dir))
 739                         f2fs_sync_fs(sbi->sb, 1);
 740         } else {
 741                 f2fs_unlink(dir, dentry);
 742         }
 743
 744         f2fs_balance_fs(sbi, true);
 745         goto out_free_encrypted_link;
 746
 747 out_f2fs_handle_failed_inode:
 748         f2fs_handle_failed_inode(inode);
 749 out_free_encrypted_link:
 750         if (disk_link.name != (unsigned char *)symname)
 751                 kfree(disk_link.name);
 752         return err;
 753 }
 754
 755 static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
 756                       struct dentry *dentry, umode_t mode)
 757 {
 758         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 759         struct inode *inode;
 760         int err;
 761
 762         if (unlikely(f2fs_cp_error(sbi)))
 763                 return -EIO;
 764
 765         err = f2fs_dquot_initialize(dir);
 766         if (err)
 767                 return err;
 768
 769         inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
 770         if (IS_ERR(inode))
 771                 return PTR_ERR(inode);
 772
 773         inode->i_op = &f2fs_dir_inode_operations;
 774         inode->i_fop = &f2fs_dir_operations;
 775         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 776         mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 777
 778         set_inode_flag(inode, FI_INC_LINK);
 779         f2fs_lock_op(sbi);
 780         err = f2fs_add_link(dentry, inode);
 781         if (err)
 782                 goto out_fail;
 783         f2fs_unlock_op(sbi);
 784
 785         f2fs_alloc_nid_done(sbi, inode->i_ino);
 786
 787         d_instantiate_new(dentry, inode);
 788
 789         if (IS_DIRSYNC(dir))
 790                 f2fs_sync_fs(sbi->sb, 1);
 791
 792         f2fs_balance_fs(sbi, true);
 793         return 0;
 794
 795 out_fail:
 796         clear_inode_flag(inode, FI_INC_LINK);
 797         f2fs_handle_failed_inode(inode);
 798         return err;
 799 }
 800
 801 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 802 {
 803         struct inode *inode = d_inode(dentry);
 804
 805         if (f2fs_empty_dir(inode))
 806                 return f2fs_unlink(dir, dentry);
 807         return -ENOTEMPTY;
 808 }
 809
 810 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
 811                       struct dentry *dentry, umode_t mode, dev_t rdev)
 812 {
 813         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 814         struct inode *inode;
 815         int err = 0;
 816
 817         if (unlikely(f2fs_cp_error(sbi)))
 818                 return -EIO;
 819         if (!f2fs_is_checkpoint_ready(sbi))
 820                 return -ENOSPC;
 821
 822         err = f2fs_dquot_initialize(dir);
 823         if (err)
 824                 return err;
 825
 826         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 827         if (IS_ERR(inode))
 828                 return PTR_ERR(inode);
 829
 830         init_special_inode(inode, inode->i_mode, rdev);
 831         inode->i_op = &f2fs_special_inode_operations;
 832
 833         f2fs_lock_op(sbi);
 834         err = f2fs_add_link(dentry, inode);
 835         if (err)
 836                 goto out;
 837         f2fs_unlock_op(sbi);
 838
 839         f2fs_alloc_nid_done(sbi, inode->i_ino);
 840
 841         d_instantiate_new(dentry, inode);
 842
 843         if (IS_DIRSYNC(dir))
 844                 f2fs_sync_fs(sbi->sb, 1);
 845
 846         f2fs_balance_fs(sbi, true);
 847         return 0;
 848 out:
 849         f2fs_handle_failed_inode(inode);
 850         return err;
 851 }
 852
 853 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 854                           struct file *file, umode_t mode, bool is_whiteout,
 855                           struct inode **new_inode)
 856 {
 857         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 858         struct inode *inode;
 859         int err;
 860
 861         err = f2fs_dquot_initialize(dir);
 862         if (err)
 863                 return err;
 864
 865         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 866         if (IS_ERR(inode))
 867                 return PTR_ERR(inode);
 868
 869         if (is_whiteout) {
 870                 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
 871                 inode->i_op = &f2fs_special_inode_operations;
 872         } else {
 873                 inode->i_op = &f2fs_file_inode_operations;
 874                 inode->i_fop = &f2fs_file_operations;
 875                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 876         }
 877
 878         f2fs_lock_op(sbi);
 879         err = f2fs_acquire_orphan_inode(sbi);
 880         if (err)
 881                 goto out;
 882
 883         err = f2fs_do_tmpfile(inode, dir);
 884         if (err)
 885                 goto release_out;
 886
 887         /*
 888          * add this non-linked tmpfile to orphan list, in this way we could
 889          * remove all unused data of tmpfile after abnormal power-off.
 890          */
 891         f2fs_add_orphan_inode(inode);
 892         f2fs_alloc_nid_done(sbi, inode->i_ino);
 893
 894         if (is_whiteout) {
 895                 f2fs_i_links_write(inode, false);
 896
 897                 spin_lock(&inode->i_lock);
 898                 inode->i_state |= I_LINKABLE;
 899                 spin_unlock(&inode->i_lock);
 900         } else {
 901                 if (file)
 902                         d_tmpfile(file, inode);
 903                 else
 904                         f2fs_i_links_write(inode, false);
 905         }
 906         /* link_count was changed by d_tmpfile as well. */
 907         f2fs_unlock_op(sbi);
 908         unlock_new_inode(inode);
 909
 910         if (new_inode)
 911                 *new_inode = inode;
 912
 913         f2fs_balance_fs(sbi, true);
 914         return 0;
 915
 916 release_out:
 917         f2fs_release_orphan_inode(sbi);
 918 out:
 919         f2fs_handle_failed_inode(inode);
 920         return err;
 921 }
 922
 923 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 924                         struct file *file, umode_t mode)
 925 {
 926         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 927         int err;
 928
 929         if (unlikely(f2fs_cp_error(sbi)))
 930                 return -EIO;
 931         if (!f2fs_is_checkpoint_ready(sbi))
 932                 return -ENOSPC;
 933
 934         err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL);
 935
 936         return finish_open_simple(file, err);
 937 }
 938
 939 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
 940                                 struct inode *dir, struct inode **whiteout)
 941 {
 942         return __f2fs_tmpfile(idmap, dir, NULL,
 943                                 S_IFCHR | WHITEOUT_MODE, true, whiteout);
 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, false, new_inode);
 950 }
 951
 952 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 953                         struct dentry *old_dentry, struct inode *new_dir,
 954                         struct dentry *new_dentry, unsigned int flags)
 955 {
 956         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 957         struct inode *old_inode = d_inode(old_dentry);
 958         struct inode *new_inode = d_inode(new_dentry);
 959         struct inode *whiteout = NULL;
 960         struct page *old_dir_page = NULL;
 961         struct page *old_page, *new_page = NULL;
 962         struct f2fs_dir_entry *old_dir_entry = NULL;
 963         struct f2fs_dir_entry *old_entry;
 964         struct f2fs_dir_entry *new_entry;
 965         bool old_is_dir = S_ISDIR(old_inode->i_mode);
 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 (old_is_dir && old_dir != new_dir) {
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_is_dir && !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_is_dir)
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_is_dir)
1078                         f2fs_i_links_write(new_dir, true);
1079         }
1080
1081         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1082         if (!old_is_dir || 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_is_dir) {
1109                 if (old_dir_entry)
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         trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1320                                                                 flags);
1321
1322         err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1323                                      flags);
1324         if (err)
1325                 return err;
1326
1327         if (flags & RENAME_EXCHANGE)
1328                 err = f2fs_cross_rename(old_dir, old_dentry,
1329                                         new_dir, new_dentry);
1330         else
1331         /*
1332          * VFS has already handled the new dentry existence case,
1333          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1334          */
1335                 err = f2fs_rename(idmap, old_dir, old_dentry,
1336                                         new_dir, new_dentry, flags);
1337
1338         trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1339         return err;
1340 }
1341
1342 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1343                                            struct inode *inode,
1344                                            struct delayed_call *done)
1345 {
1346         struct page *page;
1347         const char *target;
1348
1349         if (!dentry)
1350                 return ERR_PTR(-ECHILD);
1351
1352         page = read_mapping_page(inode->i_mapping, 0, NULL);
1353         if (IS_ERR(page))
1354                 return ERR_CAST(page);
1355
1356         target = fscrypt_get_symlink(inode, page_address(page),
1357                                      inode->i_sb->s_blocksize, done);
1358         put_page(page);
1359         return target;
1360 }
1361
1362 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1363                                           const struct path *path,
1364                                           struct kstat *stat, u32 request_mask,
1365                                           unsigned int query_flags)
1366 {
1367         f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1368
1369         return fscrypt_symlink_getattr(path, stat);
1370 }
1371
1372 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1373         .get_link       = f2fs_encrypted_get_link,
1374         .getattr        = f2fs_encrypted_symlink_getattr,
1375         .setattr        = f2fs_setattr,
1376         .listxattr      = f2fs_listxattr,
1377 };
1378
1379 const struct inode_operations f2fs_dir_inode_operations = {
1380         .create         = f2fs_create,
1381         .lookup         = f2fs_lookup,
1382         .link           = f2fs_link,
1383         .unlink         = f2fs_unlink,
1384         .symlink        = f2fs_symlink,
1385         .mkdir          = f2fs_mkdir,
1386         .rmdir          = f2fs_rmdir,
1387         .mknod          = f2fs_mknod,
1388         .rename         = f2fs_rename2,
1389         .tmpfile        = f2fs_tmpfile,
1390         .getattr        = f2fs_getattr,
1391         .setattr        = f2fs_setattr,
1392         .get_inode_acl  = f2fs_get_acl,
1393         .set_acl        = f2fs_set_acl,
1394         .listxattr      = f2fs_listxattr,
1395         .fiemap         = f2fs_fiemap,
1396         .fileattr_get   = f2fs_fileattr_get,
1397         .fileattr_set   = f2fs_fileattr_set,
1398 };
1399
1400 const struct inode_operations f2fs_symlink_inode_operations = {
1401         .get_link       = f2fs_get_link,
1402         .getattr        = f2fs_getattr,
1403         .setattr        = f2fs_setattr,
1404         .listxattr      = f2fs_listxattr,
1405 };
1406
1407 const struct inode_operations f2fs_special_inode_operations = {
1408         .getattr        = f2fs_getattr,
1409         .setattr        = f2fs_setattr,
1410         .get_inode_acl  = f2fs_get_acl,
1411         .set_acl        = f2fs_set_acl,
1412         .listxattr      = f2fs_listxattr,
1413 };