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 struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
  26 {
  27         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  28         nid_t ino;
  29         struct inode *inode;
  30         bool nid_free = false;
  31         bool encrypt = false;
  32         int xattr_size = 0;
  33         int err;
  34
  35         inode = new_inode(dir->i_sb);
  36         if (!inode)
  37                 return ERR_PTR(-ENOMEM);
  38
  39         f2fs_lock_op(sbi);
  40         if (!f2fs_alloc_nid(sbi, &ino)) {
  41                 f2fs_unlock_op(sbi);
  42                 err = -ENOSPC;
  43                 goto fail;
  44         }
  45         f2fs_unlock_op(sbi);
  46
  47         nid_free = true;
  48
  49         inode_init_owner(&init_user_ns, inode, dir, mode);
  50
  51         inode->i_ino = ino;
  52         inode->i_blocks = 0;
  53         inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
  54         F2FS_I(inode)->i_crtime = inode->i_mtime;
  55         inode->i_generation = prandom_u32();
  56
  57         if (S_ISDIR(inode->i_mode))
  58                 F2FS_I(inode)->i_current_depth = 1;
  59
  60         err = insert_inode_locked(inode);
  61         if (err) {
  62                 err = -EINVAL;
  63                 goto fail;
  64         }
  65
  66         if (f2fs_sb_has_project_quota(sbi) &&
  67                 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
  68                 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
  69         else
  70                 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
  71                                                         F2FS_DEF_PROJID);
  72
  73         err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
  74         if (err)
  75                 goto fail_drop;
  76
  77         err = f2fs_dquot_initialize(inode);
  78         if (err)
  79                 goto fail_drop;
  80
  81         set_inode_flag(inode, FI_NEW_INODE);
  82
  83         if (encrypt)
  84                 f2fs_set_encrypted_inode(inode);
  85
  86         if (f2fs_sb_has_extra_attr(sbi)) {
  87                 set_inode_flag(inode, FI_EXTRA_ATTR);
  88                 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
  89         }
  90
  91         if (test_opt(sbi, INLINE_XATTR))
  92                 set_inode_flag(inode, FI_INLINE_XATTR);
  93
  94         if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
  95                 set_inode_flag(inode, FI_INLINE_DATA);
  96         if (f2fs_may_inline_dentry(inode))
  97                 set_inode_flag(inode, FI_INLINE_DENTRY);
  98
  99         if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
 100                 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
 101                 if (f2fs_has_inline_xattr(inode))
 102                         xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
 103                 /* Otherwise, will be 0 */
 104         } else if (f2fs_has_inline_xattr(inode) ||
 105                                 f2fs_has_inline_dentry(inode)) {
 106                 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
 107         }
 108         F2FS_I(inode)->i_inline_xattr_size = xattr_size;
 109
 110         f2fs_init_extent_tree(inode, NULL);
 111
 112         stat_inc_inline_xattr(inode);
 113         stat_inc_inline_inode(inode);
 114         stat_inc_inline_dir(inode);
 115
 116         F2FS_I(inode)->i_flags =
 117                 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
 118
 119         if (S_ISDIR(inode->i_mode))
 120                 F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
 121
 122         if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
 123                 set_inode_flag(inode, FI_PROJ_INHERIT);
 124
 125         if (f2fs_sb_has_compression(sbi)) {
 126                 /* Inherit the compression flag in directory */
 127                 if ((F2FS_I(dir)->i_flags & F2FS_COMPR_FL) &&
 128                                         f2fs_may_compress(inode))
 129                         set_compress_context(inode);
 130         }
 131
 132         f2fs_set_inode_flags(inode);
 133
 134         trace_f2fs_new_inode(inode, 0);
 135         return inode;
 136
 137 fail:
 138         trace_f2fs_new_inode(inode, err);
 139         make_bad_inode(inode);
 140         if (nid_free)
 141                 set_inode_flag(inode, FI_FREE_NID);
 142         iput(inode);
 143         return ERR_PTR(err);
 144 fail_drop:
 145         trace_f2fs_new_inode(inode, err);
 146         dquot_drop(inode);
 147         inode->i_flags |= S_NOQUOTA;
 148         if (nid_free)
 149                 set_inode_flag(inode, FI_FREE_NID);
 150         clear_nlink(inode);
 151         unlock_new_inode(inode);
 152         iput(inode);
 153         return ERR_PTR(err);
 154 }
 155
 156 static inline int is_extension_exist(const unsigned char *s, const char *sub,
 157                                                 bool tmp_ext)
 158 {
 159         size_t slen = strlen(s);
 160         size_t sublen = strlen(sub);
 161         int i;
 162
 163         if (sublen == 1 && *sub == '*')
 164                 return 1;
 165
 166         /*
 167          * filename format of multimedia file should be defined as:
 168          * "filename + '.' + extension + (optional: '.' + temp extension)".
 169          */
 170         if (slen < sublen + 2)
 171                 return 0;
 172
 173         if (!tmp_ext) {
 174                 /* file has no temp extension */
 175                 if (s[slen - sublen - 1] != '.')
 176                         return 0;
 177                 return !strncasecmp(s + slen - sublen, sub, sublen);
 178         }
 179
 180         for (i = 1; i < slen - sublen; i++) {
 181                 if (s[i] != '.')
 182                         continue;
 183                 if (!strncasecmp(s + i + 1, sub, sublen))
 184                         return 1;
 185         }
 186
 187         return 0;
 188 }
 189
 190 /*
 191  * Set file's temperature for hot/cold data separation
 192  */
 193 static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
 194                 const unsigned char *name)
 195 {
 196         __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
 197         int i, cold_count, hot_count;
 198
 199         down_read(&sbi->sb_lock);
 200
 201         cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 202         hot_count = sbi->raw_super->hot_ext_count;
 203
 204         for (i = 0; i < cold_count + hot_count; i++) {
 205                 if (is_extension_exist(name, extlist[i], true))
 206                         break;
 207         }
 208
 209         up_read(&sbi->sb_lock);
 210
 211         if (i == cold_count + hot_count)
 212                 return;
 213
 214         if (i < cold_count)
 215                 file_set_cold(inode);
 216         else
 217                 file_set_hot(inode);
 218 }
 219
 220 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
 221                                                         bool hot, bool set)
 222 {
 223         __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
 224         int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 225         int hot_count = sbi->raw_super->hot_ext_count;
 226         int total_count = cold_count + hot_count;
 227         int start, count;
 228         int i;
 229
 230         if (set) {
 231                 if (total_count == F2FS_MAX_EXTENSION)
 232                         return -EINVAL;
 233         } else {
 234                 if (!hot && !cold_count)
 235                         return -EINVAL;
 236                 if (hot && !hot_count)
 237                         return -EINVAL;
 238         }
 239
 240         if (hot) {
 241                 start = cold_count;
 242                 count = total_count;
 243         } else {
 244                 start = 0;
 245                 count = cold_count;
 246         }
 247
 248         for (i = start; i < count; i++) {
 249                 if (strcmp(name, extlist[i]))
 250                         continue;
 251
 252                 if (set)
 253                         return -EINVAL;
 254
 255                 memcpy(extlist[i], extlist[i + 1],
 256                                 F2FS_EXTENSION_LEN * (total_count - i - 1));
 257                 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
 258                 if (hot)
 259                         sbi->raw_super->hot_ext_count = hot_count - 1;
 260                 else
 261                         sbi->raw_super->extension_count =
 262                                                 cpu_to_le32(cold_count - 1);
 263                 return 0;
 264         }
 265
 266         if (!set)
 267                 return -EINVAL;
 268
 269         if (hot) {
 270                 memcpy(extlist[count], name, strlen(name));
 271                 sbi->raw_super->hot_ext_count = hot_count + 1;
 272         } else {
 273                 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
 274
 275                 memcpy(buf, &extlist[cold_count],
 276                                 F2FS_EXTENSION_LEN * hot_count);
 277                 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
 278                 memcpy(extlist[cold_count], name, strlen(name));
 279                 memcpy(&extlist[cold_count + 1], buf,
 280                                 F2FS_EXTENSION_LEN * hot_count);
 281                 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
 282         }
 283         return 0;
 284 }
 285
 286 static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode,
 287                                                 const unsigned char *name)
 288 {
 289         __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
 290         unsigned char (*noext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).noextensions;
 291         unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
 292         unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
 293         unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
 294         int i, cold_count, hot_count;
 295
 296         if (!f2fs_sb_has_compression(sbi) ||
 297                         F2FS_I(inode)->i_flags & F2FS_NOCOMP_FL ||
 298                         !f2fs_may_compress(inode) ||
 299                         (!ext_cnt && !noext_cnt))
 300                 return;
 301
 302         down_read(&sbi->sb_lock);
 303
 304         cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 305         hot_count = sbi->raw_super->hot_ext_count;
 306
 307         for (i = cold_count; i < cold_count + hot_count; i++) {
 308                 if (is_extension_exist(name, extlist[i], false)) {
 309                         up_read(&sbi->sb_lock);
 310                         return;
 311                 }
 312         }
 313
 314         up_read(&sbi->sb_lock);
 315
 316         for (i = 0; i < noext_cnt; i++) {
 317                 if (is_extension_exist(name, noext[i], false)) {
 318                         f2fs_disable_compressed_file(inode);
 319                         return;
 320                 }
 321         }
 322
 323         if (is_inode_flag_set(inode, FI_COMPRESSED_FILE))
 324                 return;
 325
 326         for (i = 0; i < ext_cnt; i++) {
 327                 if (!is_extension_exist(name, ext[i], false))
 328                         continue;
 329
 330                 set_compress_context(inode);
 331                 return;
 332         }
 333 }
 334
 335 static int f2fs_create(struct user_namespace *mnt_userns, struct inode *dir,
 336                        struct dentry *dentry, umode_t mode, bool excl)
 337 {
 338         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 339         struct inode *inode;
 340         nid_t ino = 0;
 341         int err;
 342
 343         if (unlikely(f2fs_cp_error(sbi)))
 344                 return -EIO;
 345         if (!f2fs_is_checkpoint_ready(sbi))
 346                 return -ENOSPC;
 347
 348         err = f2fs_dquot_initialize(dir);
 349         if (err)
 350                 return err;
 351
 352         inode = f2fs_new_inode(dir, mode);
 353         if (IS_ERR(inode))
 354                 return PTR_ERR(inode);
 355
 356         if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
 357                 set_file_temperature(sbi, inode, dentry->d_name.name);
 358
 359         set_compress_inode(sbi, inode, dentry->d_name.name);
 360
 361         inode->i_op = &f2fs_file_inode_operations;
 362         inode->i_fop = &f2fs_file_operations;
 363         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 364         ino = inode->i_ino;
 365
 366         f2fs_lock_op(sbi);
 367         err = f2fs_add_link(dentry, inode);
 368         if (err)
 369                 goto out;
 370         f2fs_unlock_op(sbi);
 371
 372         f2fs_alloc_nid_done(sbi, ino);
 373
 374         d_instantiate_new(dentry, inode);
 375
 376         if (IS_DIRSYNC(dir))
 377                 f2fs_sync_fs(sbi->sb, 1);
 378
 379         f2fs_balance_fs(sbi, true);
 380         return 0;
 381 out:
 382         f2fs_handle_failed_inode(inode);
 383         return err;
 384 }
 385
 386 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
 387                 struct dentry *dentry)
 388 {
 389         struct inode *inode = d_inode(old_dentry);
 390         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 391         int err;
 392
 393         if (unlikely(f2fs_cp_error(sbi)))
 394                 return -EIO;
 395         if (!f2fs_is_checkpoint_ready(sbi))
 396                 return -ENOSPC;
 397
 398         err = fscrypt_prepare_link(old_dentry, dir, dentry);
 399         if (err)
 400                 return err;
 401
 402         if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
 403                         (!projid_eq(F2FS_I(dir)->i_projid,
 404                         F2FS_I(old_dentry->d_inode)->i_projid)))
 405                 return -EXDEV;
 406
 407         err = f2fs_dquot_initialize(dir);
 408         if (err)
 409                 return err;
 410
 411         f2fs_balance_fs(sbi, true);
 412
 413         inode->i_ctime = current_time(inode);
 414         ihold(inode);
 415
 416         set_inode_flag(inode, FI_INC_LINK);
 417         f2fs_lock_op(sbi);
 418         err = f2fs_add_link(dentry, inode);
 419         if (err)
 420                 goto out;
 421         f2fs_unlock_op(sbi);
 422
 423         d_instantiate(dentry, inode);
 424
 425         if (IS_DIRSYNC(dir))
 426                 f2fs_sync_fs(sbi->sb, 1);
 427         return 0;
 428 out:
 429         clear_inode_flag(inode, FI_INC_LINK);
 430         iput(inode);
 431         f2fs_unlock_op(sbi);
 432         return err;
 433 }
 434
 435 struct dentry *f2fs_get_parent(struct dentry *child)
 436 {
 437         struct page *page;
 438         unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
 439
 440         if (!ino) {
 441                 if (IS_ERR(page))
 442                         return ERR_CAST(page);
 443                 return ERR_PTR(-ENOENT);
 444         }
 445         return d_obtain_alias(f2fs_iget(child->d_sb, ino));
 446 }
 447
 448 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
 449 {
 450         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 451         struct qstr dot = QSTR_INIT(".", 1);
 452         struct qstr dotdot = QSTR_INIT("..", 2);
 453         struct f2fs_dir_entry *de;
 454         struct page *page;
 455         int err = 0;
 456
 457         if (f2fs_readonly(sbi->sb)) {
 458                 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
 459                           dir->i_ino, pino);
 460                 return 0;
 461         }
 462
 463         err = f2fs_dquot_initialize(dir);
 464         if (err)
 465                 return err;
 466
 467         f2fs_balance_fs(sbi, true);
 468
 469         f2fs_lock_op(sbi);
 470
 471         de = f2fs_find_entry(dir, &dot, &page);
 472         if (de) {
 473                 f2fs_put_page(page, 0);
 474         } else if (IS_ERR(page)) {
 475                 err = PTR_ERR(page);
 476                 goto out;
 477         } else {
 478                 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
 479                 if (err)
 480                         goto out;
 481         }
 482
 483         de = f2fs_find_entry(dir, &dotdot, &page);
 484         if (de)
 485                 f2fs_put_page(page, 0);
 486         else if (IS_ERR(page))
 487                 err = PTR_ERR(page);
 488         else
 489                 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
 490 out:
 491         if (!err)
 492                 clear_inode_flag(dir, FI_INLINE_DOTS);
 493
 494         f2fs_unlock_op(sbi);
 495         return err;
 496 }
 497
 498 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 499                 unsigned int flags)
 500 {
 501         struct inode *inode = NULL;
 502         struct f2fs_dir_entry *de;
 503         struct page *page;
 504         struct dentry *new;
 505         nid_t ino = -1;
 506         int err = 0;
 507         unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
 508         struct f2fs_filename fname;
 509
 510         trace_f2fs_lookup_start(dir, dentry, flags);
 511
 512         if (dentry->d_name.len > F2FS_NAME_LEN) {
 513                 err = -ENAMETOOLONG;
 514                 goto out;
 515         }
 516
 517         err = f2fs_prepare_lookup(dir, dentry, &fname);
 518         generic_set_encrypted_ci_d_ops(dentry);
 519         if (err == -ENOENT)
 520                 goto out_splice;
 521         if (err)
 522                 goto out;
 523         de = __f2fs_find_entry(dir, &fname, &page);
 524         f2fs_free_filename(&fname);
 525
 526         if (!de) {
 527                 if (IS_ERR(page)) {
 528                         err = PTR_ERR(page);
 529                         goto out;
 530                 }
 531                 err = -ENOENT;
 532                 goto out_splice;
 533         }
 534
 535         ino = le32_to_cpu(de->ino);
 536         f2fs_put_page(page, 0);
 537
 538         inode = f2fs_iget(dir->i_sb, ino);
 539         if (IS_ERR(inode)) {
 540                 err = PTR_ERR(inode);
 541                 goto out;
 542         }
 543
 544         if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
 545                 err = __recover_dot_dentries(dir, root_ino);
 546                 if (err)
 547                         goto out_iput;
 548         }
 549
 550         if (f2fs_has_inline_dots(inode)) {
 551                 err = __recover_dot_dentries(inode, dir->i_ino);
 552                 if (err)
 553                         goto out_iput;
 554         }
 555         if (IS_ENCRYPTED(dir) &&
 556             (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 557             !fscrypt_has_permitted_context(dir, inode)) {
 558                 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
 559                           dir->i_ino, inode->i_ino);
 560                 err = -EPERM;
 561                 goto out_iput;
 562         }
 563 out_splice:
 564 #ifdef CONFIG_UNICODE
 565         if (!inode && IS_CASEFOLDED(dir)) {
 566                 /* Eventually we want to call d_add_ci(dentry, NULL)
 567                  * for negative dentries in the encoding case as
 568                  * well.  For now, prevent the negative dentry
 569                  * from being cached.
 570                  */
 571                 trace_f2fs_lookup_end(dir, dentry, ino, err);
 572                 return NULL;
 573         }
 574 #endif
 575         new = d_splice_alias(inode, dentry);
 576         err = PTR_ERR_OR_ZERO(new);
 577         trace_f2fs_lookup_end(dir, dentry, ino, !new ? -ENOENT : err);
 578         return new;
 579 out_iput:
 580         iput(inode);
 581 out:
 582         trace_f2fs_lookup_end(dir, dentry, ino, err);
 583         return ERR_PTR(err);
 584 }
 585
 586 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 587 {
 588         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 589         struct inode *inode = d_inode(dentry);
 590         struct f2fs_dir_entry *de;
 591         struct page *page;
 592         int err;
 593
 594         trace_f2fs_unlink_enter(dir, dentry);
 595
 596         if (unlikely(f2fs_cp_error(sbi))) {
 597                 err = -EIO;
 598                 goto fail;
 599         }
 600
 601         err = f2fs_dquot_initialize(dir);
 602         if (err)
 603                 goto fail;
 604         err = f2fs_dquot_initialize(inode);
 605         if (err)
 606                 goto fail;
 607
 608         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 609         if (!de) {
 610                 if (IS_ERR(page))
 611                         err = PTR_ERR(page);
 612                 goto fail;
 613         }
 614
 615         f2fs_balance_fs(sbi, true);
 616
 617         f2fs_lock_op(sbi);
 618         err = f2fs_acquire_orphan_inode(sbi);
 619         if (err) {
 620                 f2fs_unlock_op(sbi);
 621                 f2fs_put_page(page, 0);
 622                 goto fail;
 623         }
 624         f2fs_delete_entry(de, page, dir, inode);
 625 #ifdef CONFIG_UNICODE
 626         /* VFS negative dentries are incompatible with Encoding and
 627          * Case-insensitiveness. Eventually we'll want avoid
 628          * invalidating the dentries here, alongside with returning the
 629          * negative dentries at f2fs_lookup(), when it is better
 630          * supported by the VFS for the CI case.
 631          */
 632         if (IS_CASEFOLDED(dir))
 633                 d_invalidate(dentry);
 634 #endif
 635         f2fs_unlock_op(sbi);
 636
 637         if (IS_DIRSYNC(dir))
 638                 f2fs_sync_fs(sbi->sb, 1);
 639 fail:
 640         trace_f2fs_unlink_exit(inode, err);
 641         return err;
 642 }
 643
 644 static const char *f2fs_get_link(struct dentry *dentry,
 645                                  struct inode *inode,
 646                                  struct delayed_call *done)
 647 {
 648         const char *link = page_get_link(dentry, inode, done);
 649
 650         if (!IS_ERR(link) && !*link) {
 651                 /* this is broken symlink case */
 652                 do_delayed_call(done);
 653                 clear_delayed_call(done);
 654                 link = ERR_PTR(-ENOENT);
 655         }
 656         return link;
 657 }
 658
 659 static int f2fs_symlink(struct user_namespace *mnt_userns, struct inode *dir,
 660                         struct dentry *dentry, const char *symname)
 661 {
 662         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 663         struct inode *inode;
 664         size_t len = strlen(symname);
 665         struct fscrypt_str disk_link;
 666         int err;
 667
 668         if (unlikely(f2fs_cp_error(sbi)))
 669                 return -EIO;
 670         if (!f2fs_is_checkpoint_ready(sbi))
 671                 return -ENOSPC;
 672
 673         err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
 674                                       &disk_link);
 675         if (err)
 676                 return err;
 677
 678         err = f2fs_dquot_initialize(dir);
 679         if (err)
 680                 return err;
 681
 682         inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
 683         if (IS_ERR(inode))
 684                 return PTR_ERR(inode);
 685
 686         if (IS_ENCRYPTED(inode))
 687                 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 688         else
 689                 inode->i_op = &f2fs_symlink_inode_operations;
 690         inode_nohighmem(inode);
 691         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 692
 693         f2fs_lock_op(sbi);
 694         err = f2fs_add_link(dentry, inode);
 695         if (err)
 696                 goto out_f2fs_handle_failed_inode;
 697         f2fs_unlock_op(sbi);
 698         f2fs_alloc_nid_done(sbi, inode->i_ino);
 699
 700         err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
 701         if (err)
 702                 goto err_out;
 703
 704         err = page_symlink(inode, disk_link.name, disk_link.len);
 705
 706 err_out:
 707         d_instantiate_new(dentry, inode);
 708
 709         /*
 710          * Let's flush symlink data in order to avoid broken symlink as much as
 711          * possible. Nevertheless, fsyncing is the best way, but there is no
 712          * way to get a file descriptor in order to flush that.
 713          *
 714          * Note that, it needs to do dir->fsync to make this recoverable.
 715          * If the symlink path is stored into inline_data, there is no
 716          * performance regression.
 717          */
 718         if (!err) {
 719                 filemap_write_and_wait_range(inode->i_mapping, 0,
 720                                                         disk_link.len - 1);
 721
 722                 if (IS_DIRSYNC(dir))
 723                         f2fs_sync_fs(sbi->sb, 1);
 724         } else {
 725                 f2fs_unlink(dir, dentry);
 726         }
 727
 728         f2fs_balance_fs(sbi, true);
 729         goto out_free_encrypted_link;
 730
 731 out_f2fs_handle_failed_inode:
 732         f2fs_handle_failed_inode(inode);
 733 out_free_encrypted_link:
 734         if (disk_link.name != (unsigned char *)symname)
 735                 kfree(disk_link.name);
 736         return err;
 737 }
 738
 739 static int f2fs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
 740                       struct dentry *dentry, umode_t mode)
 741 {
 742         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 743         struct inode *inode;
 744         int err;
 745
 746         if (unlikely(f2fs_cp_error(sbi)))
 747                 return -EIO;
 748
 749         err = f2fs_dquot_initialize(dir);
 750         if (err)
 751                 return err;
 752
 753         inode = f2fs_new_inode(dir, S_IFDIR | mode);
 754         if (IS_ERR(inode))
 755                 return PTR_ERR(inode);
 756
 757         inode->i_op = &f2fs_dir_inode_operations;
 758         inode->i_fop = &f2fs_dir_operations;
 759         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 760         mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 761
 762         set_inode_flag(inode, FI_INC_LINK);
 763         f2fs_lock_op(sbi);
 764         err = f2fs_add_link(dentry, inode);
 765         if (err)
 766                 goto out_fail;
 767         f2fs_unlock_op(sbi);
 768
 769         f2fs_alloc_nid_done(sbi, inode->i_ino);
 770
 771         d_instantiate_new(dentry, inode);
 772
 773         if (IS_DIRSYNC(dir))
 774                 f2fs_sync_fs(sbi->sb, 1);
 775
 776         f2fs_balance_fs(sbi, true);
 777         return 0;
 778
 779 out_fail:
 780         clear_inode_flag(inode, FI_INC_LINK);
 781         f2fs_handle_failed_inode(inode);
 782         return err;
 783 }
 784
 785 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 786 {
 787         struct inode *inode = d_inode(dentry);
 788
 789         if (f2fs_empty_dir(inode))
 790                 return f2fs_unlink(dir, dentry);
 791         return -ENOTEMPTY;
 792 }
 793
 794 static int f2fs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
 795                       struct dentry *dentry, umode_t mode, dev_t rdev)
 796 {
 797         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 798         struct inode *inode;
 799         int err = 0;
 800
 801         if (unlikely(f2fs_cp_error(sbi)))
 802                 return -EIO;
 803         if (!f2fs_is_checkpoint_ready(sbi))
 804                 return -ENOSPC;
 805
 806         err = f2fs_dquot_initialize(dir);
 807         if (err)
 808                 return err;
 809
 810         inode = f2fs_new_inode(dir, mode);
 811         if (IS_ERR(inode))
 812                 return PTR_ERR(inode);
 813
 814         init_special_inode(inode, inode->i_mode, rdev);
 815         inode->i_op = &f2fs_special_inode_operations;
 816
 817         f2fs_lock_op(sbi);
 818         err = f2fs_add_link(dentry, inode);
 819         if (err)
 820                 goto out;
 821         f2fs_unlock_op(sbi);
 822
 823         f2fs_alloc_nid_done(sbi, inode->i_ino);
 824
 825         d_instantiate_new(dentry, inode);
 826
 827         if (IS_DIRSYNC(dir))
 828                 f2fs_sync_fs(sbi->sb, 1);
 829
 830         f2fs_balance_fs(sbi, true);
 831         return 0;
 832 out:
 833         f2fs_handle_failed_inode(inode);
 834         return err;
 835 }
 836
 837 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
 838                                         umode_t mode, struct inode **whiteout)
 839 {
 840         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 841         struct inode *inode;
 842         int err;
 843
 844         err = f2fs_dquot_initialize(dir);
 845         if (err)
 846                 return err;
 847
 848         inode = f2fs_new_inode(dir, mode);
 849         if (IS_ERR(inode))
 850                 return PTR_ERR(inode);
 851
 852         if (whiteout) {
 853                 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
 854                 inode->i_op = &f2fs_special_inode_operations;
 855         } else {
 856                 inode->i_op = &f2fs_file_inode_operations;
 857                 inode->i_fop = &f2fs_file_operations;
 858                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 859         }
 860
 861         f2fs_lock_op(sbi);
 862         err = f2fs_acquire_orphan_inode(sbi);
 863         if (err)
 864                 goto out;
 865
 866         err = f2fs_do_tmpfile(inode, dir);
 867         if (err)
 868                 goto release_out;
 869
 870         /*
 871          * add this non-linked tmpfile to orphan list, in this way we could
 872          * remove all unused data of tmpfile after abnormal power-off.
 873          */
 874         f2fs_add_orphan_inode(inode);
 875         f2fs_alloc_nid_done(sbi, inode->i_ino);
 876
 877         if (whiteout) {
 878                 f2fs_i_links_write(inode, false);
 879
 880                 spin_lock(&inode->i_lock);
 881                 inode->i_state |= I_LINKABLE;
 882                 spin_unlock(&inode->i_lock);
 883
 884                 *whiteout = inode;
 885         } else {
 886                 d_tmpfile(dentry, inode);
 887         }
 888         /* link_count was changed by d_tmpfile as well. */
 889         f2fs_unlock_op(sbi);
 890         unlock_new_inode(inode);
 891
 892         f2fs_balance_fs(sbi, true);
 893         return 0;
 894
 895 release_out:
 896         f2fs_release_orphan_inode(sbi);
 897 out:
 898         f2fs_handle_failed_inode(inode);
 899         return err;
 900 }
 901
 902 static int f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
 903                         struct dentry *dentry, umode_t mode)
 904 {
 905         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 906
 907         if (unlikely(f2fs_cp_error(sbi)))
 908                 return -EIO;
 909         if (!f2fs_is_checkpoint_ready(sbi))
 910                 return -ENOSPC;
 911
 912         return __f2fs_tmpfile(dir, dentry, mode, NULL);
 913 }
 914
 915 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
 916 {
 917         if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
 918                 return -EIO;
 919
 920         return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
 921 }
 922
 923 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 924                         struct inode *new_dir, struct dentry *new_dentry,
 925                         unsigned int flags)
 926 {
 927         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 928         struct inode *old_inode = d_inode(old_dentry);
 929         struct inode *new_inode = d_inode(new_dentry);
 930         struct inode *whiteout = NULL;
 931         struct page *old_dir_page = NULL;
 932         struct page *old_page, *new_page = NULL;
 933         struct f2fs_dir_entry *old_dir_entry = NULL;
 934         struct f2fs_dir_entry *old_entry;
 935         struct f2fs_dir_entry *new_entry;
 936         int err;
 937
 938         if (unlikely(f2fs_cp_error(sbi)))
 939                 return -EIO;
 940         if (!f2fs_is_checkpoint_ready(sbi))
 941                 return -ENOSPC;
 942
 943         if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
 944                         (!projid_eq(F2FS_I(new_dir)->i_projid,
 945                         F2FS_I(old_dentry->d_inode)->i_projid)))
 946                 return -EXDEV;
 947
 948         /*
 949          * If new_inode is null, the below renaming flow will
 950          * add a link in old_dir which can conver inline_dir.
 951          * After then, if we failed to get the entry due to other
 952          * reasons like ENOMEM, we had to remove the new entry.
 953          * Instead of adding such the error handling routine, let's
 954          * simply convert first here.
 955          */
 956         if (old_dir == new_dir && !new_inode) {
 957                 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
 958                 if (err)
 959                         return err;
 960         }
 961
 962         if (flags & RENAME_WHITEOUT) {
 963                 err = f2fs_create_whiteout(old_dir, &whiteout);
 964                 if (err)
 965                         return err;
 966         }
 967
 968         err = f2fs_dquot_initialize(old_dir);
 969         if (err)
 970                 goto out;
 971
 972         err = f2fs_dquot_initialize(new_dir);
 973         if (err)
 974                 goto out;
 975
 976         if (new_inode) {
 977                 err = f2fs_dquot_initialize(new_inode);
 978                 if (err)
 979                         goto out;
 980         }
 981
 982         err = -ENOENT;
 983         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 984         if (!old_entry) {
 985                 if (IS_ERR(old_page))
 986                         err = PTR_ERR(old_page);
 987                 goto out;
 988         }
 989
 990         if (S_ISDIR(old_inode->i_mode)) {
 991                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
 992                 if (!old_dir_entry) {
 993                         if (IS_ERR(old_dir_page))
 994                                 err = PTR_ERR(old_dir_page);
 995                         goto out_old;
 996                 }
 997         }
 998
 999         if (new_inode) {
1000
1001                 err = -ENOTEMPTY;
1002                 if (old_dir_entry && !f2fs_empty_dir(new_inode))
1003                         goto out_dir;
1004
1005                 err = -ENOENT;
1006                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1007                                                 &new_page);
1008                 if (!new_entry) {
1009                         if (IS_ERR(new_page))
1010                                 err = PTR_ERR(new_page);
1011                         goto out_dir;
1012                 }
1013
1014                 f2fs_balance_fs(sbi, true);
1015
1016                 f2fs_lock_op(sbi);
1017
1018                 err = f2fs_acquire_orphan_inode(sbi);
1019                 if (err)
1020                         goto put_out_dir;
1021
1022                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1023                 new_page = NULL;
1024
1025                 new_inode->i_ctime = current_time(new_inode);
1026                 down_write(&F2FS_I(new_inode)->i_sem);
1027                 if (old_dir_entry)
1028                         f2fs_i_links_write(new_inode, false);
1029                 f2fs_i_links_write(new_inode, false);
1030                 up_write(&F2FS_I(new_inode)->i_sem);
1031
1032                 if (!new_inode->i_nlink)
1033                         f2fs_add_orphan_inode(new_inode);
1034                 else
1035                         f2fs_release_orphan_inode(sbi);
1036         } else {
1037                 f2fs_balance_fs(sbi, true);
1038
1039                 f2fs_lock_op(sbi);
1040
1041                 err = f2fs_add_link(new_dentry, old_inode);
1042                 if (err) {
1043                         f2fs_unlock_op(sbi);
1044                         goto out_dir;
1045                 }
1046
1047                 if (old_dir_entry)
1048                         f2fs_i_links_write(new_dir, true);
1049         }
1050
1051         down_write(&F2FS_I(old_inode)->i_sem);
1052         if (!old_dir_entry || whiteout)
1053                 file_lost_pino(old_inode);
1054         else
1055                 /* adjust dir's i_pino to pass fsck check */
1056                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1057         up_write(&F2FS_I(old_inode)->i_sem);
1058
1059         old_inode->i_ctime = current_time(old_inode);
1060         f2fs_mark_inode_dirty_sync(old_inode, false);
1061
1062         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1063         old_page = NULL;
1064
1065         if (whiteout) {
1066                 set_inode_flag(whiteout, FI_INC_LINK);
1067                 err = f2fs_add_link(old_dentry, whiteout);
1068                 if (err)
1069                         goto put_out_dir;
1070
1071                 spin_lock(&whiteout->i_lock);
1072                 whiteout->i_state &= ~I_LINKABLE;
1073                 spin_unlock(&whiteout->i_lock);
1074
1075                 iput(whiteout);
1076         }
1077
1078         if (old_dir_entry) {
1079                 if (old_dir != new_dir && !whiteout)
1080                         f2fs_set_link(old_inode, old_dir_entry,
1081                                                 old_dir_page, new_dir);
1082                 else
1083                         f2fs_put_page(old_dir_page, 0);
1084                 f2fs_i_links_write(old_dir, false);
1085         }
1086         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1087                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1088                 if (S_ISDIR(old_inode->i_mode))
1089                         f2fs_add_ino_entry(sbi, old_inode->i_ino,
1090                                                         TRANS_DIR_INO);
1091         }
1092
1093         f2fs_unlock_op(sbi);
1094
1095         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1096                 f2fs_sync_fs(sbi->sb, 1);
1097
1098         f2fs_update_time(sbi, REQ_TIME);
1099         return 0;
1100
1101 put_out_dir:
1102         f2fs_unlock_op(sbi);
1103         f2fs_put_page(new_page, 0);
1104 out_dir:
1105         if (old_dir_entry)
1106                 f2fs_put_page(old_dir_page, 0);
1107 out_old:
1108         f2fs_put_page(old_page, 0);
1109 out:
1110         if (whiteout)
1111                 iput(whiteout);
1112         return err;
1113 }
1114
1115 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1116                              struct inode *new_dir, struct dentry *new_dentry)
1117 {
1118         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1119         struct inode *old_inode = d_inode(old_dentry);
1120         struct inode *new_inode = d_inode(new_dentry);
1121         struct page *old_dir_page, *new_dir_page;
1122         struct page *old_page, *new_page;
1123         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1124         struct f2fs_dir_entry *old_entry, *new_entry;
1125         int old_nlink = 0, new_nlink = 0;
1126         int err;
1127
1128         if (unlikely(f2fs_cp_error(sbi)))
1129                 return -EIO;
1130         if (!f2fs_is_checkpoint_ready(sbi))
1131                 return -ENOSPC;
1132
1133         if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1134                         !projid_eq(F2FS_I(new_dir)->i_projid,
1135                         F2FS_I(old_dentry->d_inode)->i_projid)) ||
1136             (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1137                         !projid_eq(F2FS_I(old_dir)->i_projid,
1138                         F2FS_I(new_dentry->d_inode)->i_projid)))
1139                 return -EXDEV;
1140
1141         err = f2fs_dquot_initialize(old_dir);
1142         if (err)
1143                 goto out;
1144
1145         err = f2fs_dquot_initialize(new_dir);
1146         if (err)
1147                 goto out;
1148
1149         err = -ENOENT;
1150         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1151         if (!old_entry) {
1152                 if (IS_ERR(old_page))
1153                         err = PTR_ERR(old_page);
1154                 goto out;
1155         }
1156
1157         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1158         if (!new_entry) {
1159                 if (IS_ERR(new_page))
1160                         err = PTR_ERR(new_page);
1161                 goto out_old;
1162         }
1163
1164         /* prepare for updating ".." directory entry info later */
1165         if (old_dir != new_dir) {
1166                 if (S_ISDIR(old_inode->i_mode)) {
1167                         old_dir_entry = f2fs_parent_dir(old_inode,
1168                                                         &old_dir_page);
1169                         if (!old_dir_entry) {
1170                                 if (IS_ERR(old_dir_page))
1171                                         err = PTR_ERR(old_dir_page);
1172                                 goto out_new;
1173                         }
1174                 }
1175
1176                 if (S_ISDIR(new_inode->i_mode)) {
1177                         new_dir_entry = f2fs_parent_dir(new_inode,
1178                                                         &new_dir_page);
1179                         if (!new_dir_entry) {
1180                                 if (IS_ERR(new_dir_page))
1181                                         err = PTR_ERR(new_dir_page);
1182                                 goto out_old_dir;
1183                         }
1184                 }
1185         }
1186
1187         /*
1188          * If cross rename between file and directory those are not
1189          * in the same directory, we will inc nlink of file's parent
1190          * later, so we should check upper boundary of its nlink.
1191          */
1192         if ((!old_dir_entry || !new_dir_entry) &&
1193                                 old_dir_entry != new_dir_entry) {
1194                 old_nlink = old_dir_entry ? -1 : 1;
1195                 new_nlink = -old_nlink;
1196                 err = -EMLINK;
1197                 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1198                         (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1199                         goto out_new_dir;
1200         }
1201
1202         f2fs_balance_fs(sbi, true);
1203
1204         f2fs_lock_op(sbi);
1205
1206         /* update ".." directory entry info of old dentry */
1207         if (old_dir_entry)
1208                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1209
1210         /* update ".." directory entry info of new dentry */
1211         if (new_dir_entry)
1212                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1213
1214         /* update directory entry info of old dir inode */
1215         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1216
1217         down_write(&F2FS_I(old_inode)->i_sem);
1218         if (!old_dir_entry)
1219                 file_lost_pino(old_inode);
1220         else
1221                 /* adjust dir's i_pino to pass fsck check */
1222                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1223         up_write(&F2FS_I(old_inode)->i_sem);
1224
1225         old_dir->i_ctime = current_time(old_dir);
1226         if (old_nlink) {
1227                 down_write(&F2FS_I(old_dir)->i_sem);
1228                 f2fs_i_links_write(old_dir, old_nlink > 0);
1229                 up_write(&F2FS_I(old_dir)->i_sem);
1230         }
1231         f2fs_mark_inode_dirty_sync(old_dir, false);
1232
1233         /* update directory entry info of new dir inode */
1234         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1235
1236         down_write(&F2FS_I(new_inode)->i_sem);
1237         if (!new_dir_entry)
1238                 file_lost_pino(new_inode);
1239         else
1240                 /* adjust dir's i_pino to pass fsck check */
1241                 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1242         up_write(&F2FS_I(new_inode)->i_sem);
1243
1244         new_dir->i_ctime = current_time(new_dir);
1245         if (new_nlink) {
1246                 down_write(&F2FS_I(new_dir)->i_sem);
1247                 f2fs_i_links_write(new_dir, new_nlink > 0);
1248                 up_write(&F2FS_I(new_dir)->i_sem);
1249         }
1250         f2fs_mark_inode_dirty_sync(new_dir, false);
1251
1252         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1253                 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1254                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1255         }
1256
1257         f2fs_unlock_op(sbi);
1258
1259         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1260                 f2fs_sync_fs(sbi->sb, 1);
1261
1262         f2fs_update_time(sbi, REQ_TIME);
1263         return 0;
1264 out_new_dir:
1265         if (new_dir_entry) {
1266                 f2fs_put_page(new_dir_page, 0);
1267         }
1268 out_old_dir:
1269         if (old_dir_entry) {
1270                 f2fs_put_page(old_dir_page, 0);
1271         }
1272 out_new:
1273         f2fs_put_page(new_page, 0);
1274 out_old:
1275         f2fs_put_page(old_page, 0);
1276 out:
1277         return err;
1278 }
1279
1280 static int f2fs_rename2(struct user_namespace *mnt_userns,
1281                         struct inode *old_dir, struct dentry *old_dentry,
1282                         struct inode *new_dir, struct dentry *new_dentry,
1283                         unsigned int flags)
1284 {
1285         int err;
1286
1287         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1288                 return -EINVAL;
1289
1290         err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1291                                      flags);
1292         if (err)
1293                 return err;
1294
1295         if (flags & RENAME_EXCHANGE) {
1296                 return f2fs_cross_rename(old_dir, old_dentry,
1297                                          new_dir, new_dentry);
1298         }
1299         /*
1300          * VFS has already handled the new dentry existence case,
1301          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1302          */
1303         return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1304 }
1305
1306 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1307                                            struct inode *inode,
1308                                            struct delayed_call *done)
1309 {
1310         struct page *page;
1311         const char *target;
1312
1313         if (!dentry)
1314                 return ERR_PTR(-ECHILD);
1315
1316         page = read_mapping_page(inode->i_mapping, 0, NULL);
1317         if (IS_ERR(page))
1318                 return ERR_CAST(page);
1319
1320         target = fscrypt_get_symlink(inode, page_address(page),
1321                                      inode->i_sb->s_blocksize, done);
1322         put_page(page);
1323         return target;
1324 }
1325
1326 static int f2fs_encrypted_symlink_getattr(struct user_namespace *mnt_userns,
1327                                           const struct path *path,
1328                                           struct kstat *stat, u32 request_mask,
1329                                           unsigned int query_flags)
1330 {
1331         f2fs_getattr(mnt_userns, path, stat, request_mask, query_flags);
1332
1333         return fscrypt_symlink_getattr(path, stat);
1334 }
1335
1336 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1337         .get_link       = f2fs_encrypted_get_link,
1338         .getattr        = f2fs_encrypted_symlink_getattr,
1339         .setattr        = f2fs_setattr,
1340         .listxattr      = f2fs_listxattr,
1341 };
1342
1343 const struct inode_operations f2fs_dir_inode_operations = {
1344         .create         = f2fs_create,
1345         .lookup         = f2fs_lookup,
1346         .link           = f2fs_link,
1347         .unlink         = f2fs_unlink,
1348         .symlink        = f2fs_symlink,
1349         .mkdir          = f2fs_mkdir,
1350         .rmdir          = f2fs_rmdir,
1351         .mknod          = f2fs_mknod,
1352         .rename         = f2fs_rename2,
1353         .tmpfile        = f2fs_tmpfile,
1354         .getattr        = f2fs_getattr,
1355         .setattr        = f2fs_setattr,
1356         .get_acl        = f2fs_get_acl,
1357         .set_acl        = f2fs_set_acl,
1358         .listxattr      = f2fs_listxattr,
1359         .fiemap         = f2fs_fiemap,
1360         .fileattr_get   = f2fs_fileattr_get,
1361         .fileattr_set   = f2fs_fileattr_set,
1362 };
1363
1364 const struct inode_operations f2fs_symlink_inode_operations = {
1365         .get_link       = f2fs_get_link,
1366         .getattr        = f2fs_getattr,
1367         .setattr        = f2fs_setattr,
1368         .listxattr      = f2fs_listxattr,
1369 };
1370
1371 const struct inode_operations f2fs_special_inode_operations = {
1372         .getattr        = f2fs_getattr,
1373         .setattr        = f2fs_setattr,
1374         .get_acl        = f2fs_get_acl,
1375         .set_acl        = f2fs_set_acl,
1376         .listxattr      = f2fs_listxattr,
1377 };