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         struct f2fs_inode_info *fi;
 225         nid_t ino;
 226         struct inode *inode;
 227         bool nid_free = false;
 228         bool encrypt = false;
 229         int xattr_size = 0;
 230         int err;
 231
 232         inode = new_inode(dir->i_sb);
 233         if (!inode)
 234                 return ERR_PTR(-ENOMEM);
 235
 236         if (!f2fs_alloc_nid(sbi, &ino)) {
 237                 err = -ENOSPC;
 238                 goto fail;
 239         }
 240
 241         nid_free = true;
 242
 243         inode_init_owner(idmap, inode, dir, mode);
 244
 245         fi = F2FS_I(inode);
 246         inode->i_ino = ino;
 247         inode->i_blocks = 0;
 248         simple_inode_init_ts(inode);
 249         fi->i_crtime = inode_get_mtime(inode);
 250         inode->i_generation = get_random_u32();
 251
 252         if (S_ISDIR(inode->i_mode))
 253                 fi->i_current_depth = 1;
 254
 255         err = insert_inode_locked(inode);
 256         if (err) {
 257                 err = -EINVAL;
 258                 goto fail;
 259         }
 260
 261         if (f2fs_sb_has_project_quota(sbi) &&
 262                 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
 263                 fi->i_projid = F2FS_I(dir)->i_projid;
 264         else
 265                 fi->i_projid = make_kprojid(&init_user_ns,
 266                                                         F2FS_DEF_PROJID);
 267
 268         err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
 269         if (err)
 270                 goto fail_drop;
 271
 272         err = f2fs_dquot_initialize(inode);
 273         if (err)
 274                 goto fail_drop;
 275
 276         set_inode_flag(inode, FI_NEW_INODE);
 277
 278         if (encrypt)
 279                 f2fs_set_encrypted_inode(inode);
 280
 281         if (f2fs_sb_has_extra_attr(sbi)) {
 282                 set_inode_flag(inode, FI_EXTRA_ATTR);
 283                 fi->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
 284         }
 285
 286         if (test_opt(sbi, INLINE_XATTR))
 287                 set_inode_flag(inode, FI_INLINE_XATTR);
 288
 289         if (f2fs_may_inline_dentry(inode))
 290                 set_inode_flag(inode, FI_INLINE_DENTRY);
 291
 292         if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
 293                 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
 294                 if (f2fs_has_inline_xattr(inode))
 295                         xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
 296                 /* Otherwise, will be 0 */
 297         } else if (f2fs_has_inline_xattr(inode) ||
 298                                 f2fs_has_inline_dentry(inode)) {
 299                 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
 300         }
 301         fi->i_inline_xattr_size = xattr_size;
 302
 303         fi->i_flags =
 304                 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
 305
 306         if (S_ISDIR(inode->i_mode))
 307                 fi->i_flags |= F2FS_INDEX_FL;
 308
 309         if (fi->i_flags & F2FS_PROJINHERIT_FL)
 310                 set_inode_flag(inode, FI_PROJ_INHERIT);
 311
 312         /* Check compression first. */
 313         set_compress_new_inode(sbi, dir, inode, name);
 314
 315         /* Should enable inline_data after compression set */
 316         if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
 317                 set_inode_flag(inode, FI_INLINE_DATA);
 318
 319         if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
 320                 set_file_temperature(sbi, inode, name);
 321
 322         stat_inc_inline_xattr(inode);
 323         stat_inc_inline_inode(inode);
 324         stat_inc_inline_dir(inode);
 325
 326         f2fs_set_inode_flags(inode);
 327
 328         f2fs_init_extent_tree(inode);
 329
 330         trace_f2fs_new_inode(inode, 0);
 331         return inode;
 332
 333 fail:
 334         trace_f2fs_new_inode(inode, err);
 335         make_bad_inode(inode);
 336         if (nid_free)
 337                 set_inode_flag(inode, FI_FREE_NID);
 338         iput(inode);
 339         return ERR_PTR(err);
 340 fail_drop:
 341         trace_f2fs_new_inode(inode, err);
 342         dquot_drop(inode);
 343         inode->i_flags |= S_NOQUOTA;
 344         if (nid_free)
 345                 set_inode_flag(inode, FI_FREE_NID);
 346         clear_nlink(inode);
 347         unlock_new_inode(inode);
 348         iput(inode);
 349         return ERR_PTR(err);
 350 }
 351
 352 static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
 353                        struct dentry *dentry, umode_t mode, bool excl)
 354 {
 355         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 356         struct inode *inode;
 357         nid_t ino = 0;
 358         int err;
 359
 360         if (unlikely(f2fs_cp_error(sbi)))
 361                 return -EIO;
 362         if (!f2fs_is_checkpoint_ready(sbi))
 363                 return -ENOSPC;
 364
 365         err = f2fs_dquot_initialize(dir);
 366         if (err)
 367                 return err;
 368
 369         inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
 370         if (IS_ERR(inode))
 371                 return PTR_ERR(inode);
 372
 373         inode->i_op = &f2fs_file_inode_operations;
 374         inode->i_fop = &f2fs_file_operations;
 375         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 376         ino = inode->i_ino;
 377
 378         f2fs_lock_op(sbi);
 379         err = f2fs_add_link(dentry, inode);
 380         if (err)
 381                 goto out;
 382         f2fs_unlock_op(sbi);
 383
 384         f2fs_alloc_nid_done(sbi, ino);
 385
 386         d_instantiate_new(dentry, inode);
 387
 388         if (IS_DIRSYNC(dir))
 389                 f2fs_sync_fs(sbi->sb, 1);
 390
 391         f2fs_balance_fs(sbi, true);
 392         return 0;
 393 out:
 394         f2fs_handle_failed_inode(inode);
 395         return err;
 396 }
 397
 398 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
 399                 struct dentry *dentry)
 400 {
 401         struct inode *inode = d_inode(old_dentry);
 402         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 403         int err;
 404
 405         if (unlikely(f2fs_cp_error(sbi)))
 406                 return -EIO;
 407         if (!f2fs_is_checkpoint_ready(sbi))
 408                 return -ENOSPC;
 409
 410         err = fscrypt_prepare_link(old_dentry, dir, dentry);
 411         if (err)
 412                 return err;
 413
 414         if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
 415                         (!projid_eq(F2FS_I(dir)->i_projid,
 416                         F2FS_I(old_dentry->d_inode)->i_projid)))
 417                 return -EXDEV;
 418
 419         err = f2fs_dquot_initialize(dir);
 420         if (err)
 421                 return err;
 422
 423         f2fs_balance_fs(sbi, true);
 424
 425         inode_set_ctime_current(inode);
 426         ihold(inode);
 427
 428         set_inode_flag(inode, FI_INC_LINK);
 429         f2fs_lock_op(sbi);
 430         err = f2fs_add_link(dentry, inode);
 431         if (err)
 432                 goto out;
 433         f2fs_unlock_op(sbi);
 434
 435         d_instantiate(dentry, inode);
 436
 437         if (IS_DIRSYNC(dir))
 438                 f2fs_sync_fs(sbi->sb, 1);
 439         return 0;
 440 out:
 441         clear_inode_flag(inode, FI_INC_LINK);
 442         iput(inode);
 443         f2fs_unlock_op(sbi);
 444         return err;
 445 }
 446
 447 struct dentry *f2fs_get_parent(struct dentry *child)
 448 {
 449         struct page *page;
 450         unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
 451
 452         if (!ino) {
 453                 if (IS_ERR(page))
 454                         return ERR_CAST(page);
 455                 return ERR_PTR(-ENOENT);
 456         }
 457         return d_obtain_alias(f2fs_iget(child->d_sb, ino));
 458 }
 459
 460 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 461                 unsigned int flags)
 462 {
 463         struct inode *inode = NULL;
 464         struct f2fs_dir_entry *de;
 465         struct page *page;
 466         struct dentry *new;
 467         nid_t ino = -1;
 468         int err = 0;
 469         struct f2fs_filename fname;
 470
 471         trace_f2fs_lookup_start(dir, dentry, flags);
 472
 473         if (dentry->d_name.len > F2FS_NAME_LEN) {
 474                 err = -ENAMETOOLONG;
 475                 goto out;
 476         }
 477
 478         err = f2fs_prepare_lookup(dir, dentry, &fname);
 479         if (err == -ENOENT)
 480                 goto out_splice;
 481         if (err)
 482                 goto out;
 483         de = __f2fs_find_entry(dir, &fname, &page);
 484         f2fs_free_filename(&fname);
 485
 486         if (!de) {
 487                 if (IS_ERR(page)) {
 488                         err = PTR_ERR(page);
 489                         goto out;
 490                 }
 491                 err = -ENOENT;
 492                 goto out_splice;
 493         }
 494
 495         ino = le32_to_cpu(de->ino);
 496         f2fs_put_page(page, 0);
 497
 498         inode = f2fs_iget(dir->i_sb, ino);
 499         if (IS_ERR(inode)) {
 500                 err = PTR_ERR(inode);
 501                 goto out;
 502         }
 503
 504         if (IS_ENCRYPTED(dir) &&
 505             (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 506             !fscrypt_has_permitted_context(dir, inode)) {
 507                 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
 508                           dir->i_ino, inode->i_ino);
 509                 err = -EPERM;
 510                 goto out_iput;
 511         }
 512 out_splice:
 513         if (IS_ENABLED(CONFIG_UNICODE) && !inode && IS_CASEFOLDED(dir)) {
 514                 /* Eventually we want to call d_add_ci(dentry, NULL)
 515                  * for negative dentries in the encoding case as
 516                  * well.  For now, prevent the negative dentry
 517                  * from being cached.
 518                  */
 519                 trace_f2fs_lookup_end(dir, dentry, ino, err);
 520                 return NULL;
 521         }
 522
 523         new = d_splice_alias(inode, dentry);
 524         trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
 525                                 ino, IS_ERR(new) ? PTR_ERR(new) : err);
 526         return new;
 527 out_iput:
 528         iput(inode);
 529 out:
 530         trace_f2fs_lookup_end(dir, dentry, ino, err);
 531         return ERR_PTR(err);
 532 }
 533
 534 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 535 {
 536         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 537         struct inode *inode = d_inode(dentry);
 538         struct f2fs_dir_entry *de;
 539         struct page *page;
 540         int err;
 541
 542         trace_f2fs_unlink_enter(dir, dentry);
 543
 544         if (unlikely(f2fs_cp_error(sbi))) {
 545                 err = -EIO;
 546                 goto fail;
 547         }
 548
 549         err = f2fs_dquot_initialize(dir);
 550         if (err)
 551                 goto fail;
 552         err = f2fs_dquot_initialize(inode);
 553         if (err)
 554                 goto fail;
 555
 556         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 557         if (!de) {
 558                 if (IS_ERR(page))
 559                         err = PTR_ERR(page);
 560                 goto fail;
 561         }
 562
 563         f2fs_balance_fs(sbi, true);
 564
 565         f2fs_lock_op(sbi);
 566         err = f2fs_acquire_orphan_inode(sbi);
 567         if (err) {
 568                 f2fs_unlock_op(sbi);
 569                 f2fs_put_page(page, 0);
 570                 goto fail;
 571         }
 572         f2fs_delete_entry(de, page, dir, inode);
 573         f2fs_unlock_op(sbi);
 574
 575         /* VFS negative dentries are incompatible with Encoding and
 576          * Case-insensitiveness. Eventually we'll want avoid
 577          * invalidating the dentries here, alongside with returning the
 578          * negative dentries at f2fs_lookup(), when it is better
 579          * supported by the VFS for the CI case.
 580          */
 581         if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
 582                 d_invalidate(dentry);
 583
 584         if (IS_DIRSYNC(dir))
 585                 f2fs_sync_fs(sbi->sb, 1);
 586 fail:
 587         trace_f2fs_unlink_exit(inode, err);
 588         return err;
 589 }
 590
 591 static const char *f2fs_get_link(struct dentry *dentry,
 592                                  struct inode *inode,
 593                                  struct delayed_call *done)
 594 {
 595         const char *link = page_get_link(dentry, inode, done);
 596
 597         if (!IS_ERR(link) && !*link) {
 598                 /* this is broken symlink case */
 599                 do_delayed_call(done);
 600                 clear_delayed_call(done);
 601                 link = ERR_PTR(-ENOENT);
 602         }
 603         return link;
 604 }
 605
 606 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
 607                         struct dentry *dentry, const char *symname)
 608 {
 609         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 610         struct inode *inode;
 611         size_t len = strlen(symname);
 612         struct fscrypt_str disk_link;
 613         int err;
 614
 615         if (unlikely(f2fs_cp_error(sbi)))
 616                 return -EIO;
 617         if (!f2fs_is_checkpoint_ready(sbi))
 618                 return -ENOSPC;
 619
 620         err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
 621                                       &disk_link);
 622         if (err)
 623                 return err;
 624
 625         err = f2fs_dquot_initialize(dir);
 626         if (err)
 627                 return err;
 628
 629         inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
 630         if (IS_ERR(inode))
 631                 return PTR_ERR(inode);
 632
 633         if (IS_ENCRYPTED(inode))
 634                 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 635         else
 636                 inode->i_op = &f2fs_symlink_inode_operations;
 637         inode_nohighmem(inode);
 638         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 639
 640         f2fs_lock_op(sbi);
 641         err = f2fs_add_link(dentry, inode);
 642         if (err)
 643                 goto out_f2fs_handle_failed_inode;
 644         f2fs_unlock_op(sbi);
 645         f2fs_alloc_nid_done(sbi, inode->i_ino);
 646
 647         err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
 648         if (err)
 649                 goto err_out;
 650
 651         err = page_symlink(inode, disk_link.name, disk_link.len);
 652
 653 err_out:
 654         d_instantiate_new(dentry, inode);
 655
 656         /*
 657          * Let's flush symlink data in order to avoid broken symlink as much as
 658          * possible. Nevertheless, fsyncing is the best way, but there is no
 659          * way to get a file descriptor in order to flush that.
 660          *
 661          * Note that, it needs to do dir->fsync to make this recoverable.
 662          * If the symlink path is stored into inline_data, there is no
 663          * performance regression.
 664          */
 665         if (!err) {
 666                 filemap_write_and_wait_range(inode->i_mapping, 0,
 667                                                         disk_link.len - 1);
 668
 669                 if (IS_DIRSYNC(dir))
 670                         f2fs_sync_fs(sbi->sb, 1);
 671         } else {
 672                 f2fs_unlink(dir, dentry);
 673         }
 674
 675         f2fs_balance_fs(sbi, true);
 676         goto out_free_encrypted_link;
 677
 678 out_f2fs_handle_failed_inode:
 679         f2fs_handle_failed_inode(inode);
 680 out_free_encrypted_link:
 681         if (disk_link.name != (unsigned char *)symname)
 682                 kfree(disk_link.name);
 683         return err;
 684 }
 685
 686 static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
 687                       struct dentry *dentry, umode_t mode)
 688 {
 689         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 690         struct inode *inode;
 691         int err;
 692
 693         if (unlikely(f2fs_cp_error(sbi)))
 694                 return -EIO;
 695
 696         err = f2fs_dquot_initialize(dir);
 697         if (err)
 698                 return err;
 699
 700         inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
 701         if (IS_ERR(inode))
 702                 return PTR_ERR(inode);
 703
 704         inode->i_op = &f2fs_dir_inode_operations;
 705         inode->i_fop = &f2fs_dir_operations;
 706         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 707         mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 708
 709         set_inode_flag(inode, FI_INC_LINK);
 710         f2fs_lock_op(sbi);
 711         err = f2fs_add_link(dentry, inode);
 712         if (err)
 713                 goto out_fail;
 714         f2fs_unlock_op(sbi);
 715
 716         f2fs_alloc_nid_done(sbi, inode->i_ino);
 717
 718         d_instantiate_new(dentry, inode);
 719
 720         if (IS_DIRSYNC(dir))
 721                 f2fs_sync_fs(sbi->sb, 1);
 722
 723         f2fs_balance_fs(sbi, true);
 724         return 0;
 725
 726 out_fail:
 727         clear_inode_flag(inode, FI_INC_LINK);
 728         f2fs_handle_failed_inode(inode);
 729         return err;
 730 }
 731
 732 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 733 {
 734         struct inode *inode = d_inode(dentry);
 735
 736         if (f2fs_empty_dir(inode))
 737                 return f2fs_unlink(dir, dentry);
 738         return -ENOTEMPTY;
 739 }
 740
 741 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
 742                       struct dentry *dentry, umode_t mode, dev_t rdev)
 743 {
 744         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 745         struct inode *inode;
 746         int err = 0;
 747
 748         if (unlikely(f2fs_cp_error(sbi)))
 749                 return -EIO;
 750         if (!f2fs_is_checkpoint_ready(sbi))
 751                 return -ENOSPC;
 752
 753         err = f2fs_dquot_initialize(dir);
 754         if (err)
 755                 return err;
 756
 757         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 758         if (IS_ERR(inode))
 759                 return PTR_ERR(inode);
 760
 761         init_special_inode(inode, inode->i_mode, rdev);
 762         inode->i_op = &f2fs_special_inode_operations;
 763
 764         f2fs_lock_op(sbi);
 765         err = f2fs_add_link(dentry, inode);
 766         if (err)
 767                 goto out;
 768         f2fs_unlock_op(sbi);
 769
 770         f2fs_alloc_nid_done(sbi, inode->i_ino);
 771
 772         d_instantiate_new(dentry, inode);
 773
 774         if (IS_DIRSYNC(dir))
 775                 f2fs_sync_fs(sbi->sb, 1);
 776
 777         f2fs_balance_fs(sbi, true);
 778         return 0;
 779 out:
 780         f2fs_handle_failed_inode(inode);
 781         return err;
 782 }
 783
 784 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 785                           struct file *file, umode_t mode, bool is_whiteout,
 786                           struct inode **new_inode, struct f2fs_filename *fname)
 787 {
 788         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 789         struct inode *inode;
 790         int err;
 791
 792         err = f2fs_dquot_initialize(dir);
 793         if (err)
 794                 return err;
 795
 796         inode = f2fs_new_inode(idmap, dir, mode, NULL);
 797         if (IS_ERR(inode))
 798                 return PTR_ERR(inode);
 799
 800         if (is_whiteout) {
 801                 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
 802                 inode->i_op = &f2fs_special_inode_operations;
 803         } else {
 804                 inode->i_op = &f2fs_file_inode_operations;
 805                 inode->i_fop = &f2fs_file_operations;
 806                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 807         }
 808
 809         f2fs_lock_op(sbi);
 810         err = f2fs_acquire_orphan_inode(sbi);
 811         if (err)
 812                 goto out;
 813
 814         err = f2fs_do_tmpfile(inode, dir, fname);
 815         if (err)
 816                 goto release_out;
 817
 818         /*
 819          * add this non-linked tmpfile to orphan list, in this way we could
 820          * remove all unused data of tmpfile after abnormal power-off.
 821          */
 822         f2fs_add_orphan_inode(inode);
 823         f2fs_alloc_nid_done(sbi, inode->i_ino);
 824
 825         if (is_whiteout) {
 826                 f2fs_i_links_write(inode, false);
 827
 828                 spin_lock(&inode->i_lock);
 829                 inode->i_state |= I_LINKABLE;
 830                 spin_unlock(&inode->i_lock);
 831         } else {
 832                 if (file)
 833                         d_tmpfile(file, inode);
 834                 else
 835                         f2fs_i_links_write(inode, false);
 836         }
 837         /* link_count was changed by d_tmpfile as well. */
 838         f2fs_unlock_op(sbi);
 839         unlock_new_inode(inode);
 840
 841         if (new_inode)
 842                 *new_inode = inode;
 843
 844         f2fs_balance_fs(sbi, true);
 845         return 0;
 846
 847 release_out:
 848         f2fs_release_orphan_inode(sbi);
 849 out:
 850         f2fs_handle_failed_inode(inode);
 851         return err;
 852 }
 853
 854 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 855                         struct file *file, umode_t mode)
 856 {
 857         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 858         int err;
 859
 860         if (unlikely(f2fs_cp_error(sbi)))
 861                 return -EIO;
 862         if (!f2fs_is_checkpoint_ready(sbi))
 863                 return -ENOSPC;
 864
 865         err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
 866
 867         return finish_open_simple(file, err);
 868 }
 869
 870 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
 871                                 struct inode *dir, struct inode **whiteout,
 872                                 struct f2fs_filename *fname)
 873 {
 874         return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
 875                                                 true, whiteout, fname);
 876 }
 877
 878 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
 879                      struct inode **new_inode)
 880 {
 881         return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
 882                                 false, new_inode, NULL);
 883 }
 884
 885 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 886                         struct dentry *old_dentry, struct inode *new_dir,
 887                         struct dentry *new_dentry, unsigned int flags)
 888 {
 889         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 890         struct inode *old_inode = d_inode(old_dentry);
 891         struct inode *new_inode = d_inode(new_dentry);
 892         struct inode *whiteout = NULL;
 893         struct page *old_dir_page = NULL;
 894         struct page *old_page, *new_page = NULL;
 895         struct f2fs_dir_entry *old_dir_entry = NULL;
 896         struct f2fs_dir_entry *old_entry;
 897         struct f2fs_dir_entry *new_entry;
 898         bool old_is_dir = S_ISDIR(old_inode->i_mode);
 899         int err;
 900
 901         if (unlikely(f2fs_cp_error(sbi)))
 902                 return -EIO;
 903         if (!f2fs_is_checkpoint_ready(sbi))
 904                 return -ENOSPC;
 905
 906         if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
 907                         (!projid_eq(F2FS_I(new_dir)->i_projid,
 908                         F2FS_I(old_dentry->d_inode)->i_projid)))
 909                 return -EXDEV;
 910
 911         /*
 912          * If new_inode is null, the below renaming flow will
 913          * add a link in old_dir which can convert inline_dir.
 914          * After then, if we failed to get the entry due to other
 915          * reasons like ENOMEM, we had to remove the new entry.
 916          * Instead of adding such the error handling routine, let's
 917          * simply convert first here.
 918          */
 919         if (old_dir == new_dir && !new_inode) {
 920                 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
 921                 if (err)
 922                         return err;
 923         }
 924
 925         if (flags & RENAME_WHITEOUT) {
 926                 struct f2fs_filename fname;
 927
 928                 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
 929                                                         0, &fname);
 930                 if (err)
 931                         return err;
 932
 933                 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
 934                 if (err)
 935                         return err;
 936         }
 937
 938         err = f2fs_dquot_initialize(old_dir);
 939         if (err)
 940                 goto out;
 941
 942         err = f2fs_dquot_initialize(new_dir);
 943         if (err)
 944                 goto out;
 945
 946         if (new_inode) {
 947                 err = f2fs_dquot_initialize(new_inode);
 948                 if (err)
 949                         goto out;
 950         }
 951
 952         err = -ENOENT;
 953         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
 954         if (!old_entry) {
 955                 if (IS_ERR(old_page))
 956                         err = PTR_ERR(old_page);
 957                 goto out;
 958         }
 959
 960         if (old_is_dir && old_dir != new_dir) {
 961                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
 962                 if (!old_dir_entry) {
 963                         if (IS_ERR(old_dir_page))
 964                                 err = PTR_ERR(old_dir_page);
 965                         goto out_old;
 966                 }
 967         }
 968
 969         if (new_inode) {
 970
 971                 err = -ENOTEMPTY;
 972                 if (old_is_dir && !f2fs_empty_dir(new_inode))
 973                         goto out_dir;
 974
 975                 err = -ENOENT;
 976                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
 977                                                 &new_page);
 978                 if (!new_entry) {
 979                         if (IS_ERR(new_page))
 980                                 err = PTR_ERR(new_page);
 981                         goto out_dir;
 982                 }
 983
 984                 f2fs_balance_fs(sbi, true);
 985
 986                 f2fs_lock_op(sbi);
 987
 988                 err = f2fs_acquire_orphan_inode(sbi);
 989                 if (err)
 990                         goto put_out_dir;
 991
 992                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
 993                 new_page = NULL;
 994
 995                 inode_set_ctime_current(new_inode);
 996                 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
 997                 if (old_is_dir)
 998                         f2fs_i_links_write(new_inode, false);
 999                 f2fs_i_links_write(new_inode, false);
1000                 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1001
1002                 if (!new_inode->i_nlink)
1003                         f2fs_add_orphan_inode(new_inode);
1004                 else
1005                         f2fs_release_orphan_inode(sbi);
1006         } else {
1007                 f2fs_balance_fs(sbi, true);
1008
1009                 f2fs_lock_op(sbi);
1010
1011                 err = f2fs_add_link(new_dentry, old_inode);
1012                 if (err) {
1013                         f2fs_unlock_op(sbi);
1014                         goto out_dir;
1015                 }
1016
1017                 if (old_is_dir)
1018                         f2fs_i_links_write(new_dir, true);
1019         }
1020
1021         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1022         if (!old_is_dir || whiteout)
1023                 file_lost_pino(old_inode);
1024         else
1025                 /* adjust dir's i_pino to pass fsck check */
1026                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1027         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1028
1029         inode_set_ctime_current(old_inode);
1030         f2fs_mark_inode_dirty_sync(old_inode, false);
1031
1032         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1033         old_page = NULL;
1034
1035         if (whiteout) {
1036                 set_inode_flag(whiteout, FI_INC_LINK);
1037                 err = f2fs_add_link(old_dentry, whiteout);
1038                 if (err)
1039                         goto put_out_dir;
1040
1041                 spin_lock(&whiteout->i_lock);
1042                 whiteout->i_state &= ~I_LINKABLE;
1043                 spin_unlock(&whiteout->i_lock);
1044
1045                 iput(whiteout);
1046         }
1047
1048         if (old_dir_entry)
1049                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1050         if (old_is_dir)
1051                 f2fs_i_links_write(old_dir, false);
1052
1053         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1054                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1055                 if (S_ISDIR(old_inode->i_mode))
1056                         f2fs_add_ino_entry(sbi, old_inode->i_ino,
1057                                                         TRANS_DIR_INO);
1058         }
1059
1060         f2fs_unlock_op(sbi);
1061
1062         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1063                 f2fs_sync_fs(sbi->sb, 1);
1064
1065         f2fs_update_time(sbi, REQ_TIME);
1066         return 0;
1067
1068 put_out_dir:
1069         f2fs_unlock_op(sbi);
1070         f2fs_put_page(new_page, 0);
1071 out_dir:
1072         if (old_dir_entry)
1073                 f2fs_put_page(old_dir_page, 0);
1074 out_old:
1075         f2fs_put_page(old_page, 0);
1076 out:
1077         iput(whiteout);
1078         return err;
1079 }
1080
1081 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1082                              struct inode *new_dir, struct dentry *new_dentry)
1083 {
1084         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1085         struct inode *old_inode = d_inode(old_dentry);
1086         struct inode *new_inode = d_inode(new_dentry);
1087         struct page *old_dir_page, *new_dir_page;
1088         struct page *old_page, *new_page;
1089         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1090         struct f2fs_dir_entry *old_entry, *new_entry;
1091         int old_nlink = 0, new_nlink = 0;
1092         int err;
1093
1094         if (unlikely(f2fs_cp_error(sbi)))
1095                 return -EIO;
1096         if (!f2fs_is_checkpoint_ready(sbi))
1097                 return -ENOSPC;
1098
1099         if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1100                         !projid_eq(F2FS_I(new_dir)->i_projid,
1101                         F2FS_I(old_dentry->d_inode)->i_projid)) ||
1102             (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1103                         !projid_eq(F2FS_I(old_dir)->i_projid,
1104                         F2FS_I(new_dentry->d_inode)->i_projid)))
1105                 return -EXDEV;
1106
1107         err = f2fs_dquot_initialize(old_dir);
1108         if (err)
1109                 goto out;
1110
1111         err = f2fs_dquot_initialize(new_dir);
1112         if (err)
1113                 goto out;
1114
1115         err = -ENOENT;
1116         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1117         if (!old_entry) {
1118                 if (IS_ERR(old_page))
1119                         err = PTR_ERR(old_page);
1120                 goto out;
1121         }
1122
1123         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1124         if (!new_entry) {
1125                 if (IS_ERR(new_page))
1126                         err = PTR_ERR(new_page);
1127                 goto out_old;
1128         }
1129
1130         /* prepare for updating ".." directory entry info later */
1131         if (old_dir != new_dir) {
1132                 if (S_ISDIR(old_inode->i_mode)) {
1133                         old_dir_entry = f2fs_parent_dir(old_inode,
1134                                                         &old_dir_page);
1135                         if (!old_dir_entry) {
1136                                 if (IS_ERR(old_dir_page))
1137                                         err = PTR_ERR(old_dir_page);
1138                                 goto out_new;
1139                         }
1140                 }
1141
1142                 if (S_ISDIR(new_inode->i_mode)) {
1143                         new_dir_entry = f2fs_parent_dir(new_inode,
1144                                                         &new_dir_page);
1145                         if (!new_dir_entry) {
1146                                 if (IS_ERR(new_dir_page))
1147                                         err = PTR_ERR(new_dir_page);
1148                                 goto out_old_dir;
1149                         }
1150                 }
1151         }
1152
1153         /*
1154          * If cross rename between file and directory those are not
1155          * in the same directory, we will inc nlink of file's parent
1156          * later, so we should check upper boundary of its nlink.
1157          */
1158         if ((!old_dir_entry || !new_dir_entry) &&
1159                                 old_dir_entry != new_dir_entry) {
1160                 old_nlink = old_dir_entry ? -1 : 1;
1161                 new_nlink = -old_nlink;
1162                 err = -EMLINK;
1163                 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1164                         (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1165                         goto out_new_dir;
1166         }
1167
1168         f2fs_balance_fs(sbi, true);
1169
1170         f2fs_lock_op(sbi);
1171
1172         /* update ".." directory entry info of old dentry */
1173         if (old_dir_entry)
1174                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1175
1176         /* update ".." directory entry info of new dentry */
1177         if (new_dir_entry)
1178                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1179
1180         /* update directory entry info of old dir inode */
1181         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1182
1183         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1184         if (!old_dir_entry)
1185                 file_lost_pino(old_inode);
1186         else
1187                 /* adjust dir's i_pino to pass fsck check */
1188                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1189         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1190
1191         inode_set_ctime_current(old_dir);
1192         if (old_nlink) {
1193                 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1194                 f2fs_i_links_write(old_dir, old_nlink > 0);
1195                 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1196         }
1197         f2fs_mark_inode_dirty_sync(old_dir, false);
1198
1199         /* update directory entry info of new dir inode */
1200         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1201
1202         f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1203         if (!new_dir_entry)
1204                 file_lost_pino(new_inode);
1205         else
1206                 /* adjust dir's i_pino to pass fsck check */
1207                 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1208         f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1209
1210         inode_set_ctime_current(new_dir);
1211         if (new_nlink) {
1212                 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1213                 f2fs_i_links_write(new_dir, new_nlink > 0);
1214                 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1215         }
1216         f2fs_mark_inode_dirty_sync(new_dir, false);
1217
1218         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1219                 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1220                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1221         }
1222
1223         f2fs_unlock_op(sbi);
1224
1225         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1226                 f2fs_sync_fs(sbi->sb, 1);
1227
1228         f2fs_update_time(sbi, REQ_TIME);
1229         return 0;
1230 out_new_dir:
1231         if (new_dir_entry) {
1232                 f2fs_put_page(new_dir_page, 0);
1233         }
1234 out_old_dir:
1235         if (old_dir_entry) {
1236                 f2fs_put_page(old_dir_page, 0);
1237         }
1238 out_new:
1239         f2fs_put_page(new_page, 0);
1240 out_old:
1241         f2fs_put_page(old_page, 0);
1242 out:
1243         return err;
1244 }
1245
1246 static int f2fs_rename2(struct mnt_idmap *idmap,
1247                         struct inode *old_dir, struct dentry *old_dentry,
1248                         struct inode *new_dir, struct dentry *new_dentry,
1249                         unsigned int flags)
1250 {
1251         int err;
1252
1253         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1254                 return -EINVAL;
1255
1256         trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1257                                                                 flags);
1258
1259         err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1260                                      flags);
1261         if (err)
1262                 return err;
1263
1264         if (flags & RENAME_EXCHANGE)
1265                 err = f2fs_cross_rename(old_dir, old_dentry,
1266                                         new_dir, new_dentry);
1267         else
1268         /*
1269          * VFS has already handled the new dentry existence case,
1270          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1271          */
1272                 err = f2fs_rename(idmap, old_dir, old_dentry,
1273                                         new_dir, new_dentry, flags);
1274
1275         trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1276         return err;
1277 }
1278
1279 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1280                                            struct inode *inode,
1281                                            struct delayed_call *done)
1282 {
1283         struct page *page;
1284         const char *target;
1285
1286         if (!dentry)
1287                 return ERR_PTR(-ECHILD);
1288
1289         page = read_mapping_page(inode->i_mapping, 0, NULL);
1290         if (IS_ERR(page))
1291                 return ERR_CAST(page);
1292
1293         target = fscrypt_get_symlink(inode, page_address(page),
1294                                      inode->i_sb->s_blocksize, done);
1295         put_page(page);
1296         return target;
1297 }
1298
1299 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1300                                           const struct path *path,
1301                                           struct kstat *stat, u32 request_mask,
1302                                           unsigned int query_flags)
1303 {
1304         f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1305
1306         return fscrypt_symlink_getattr(path, stat);
1307 }
1308
1309 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1310         .get_link       = f2fs_encrypted_get_link,
1311         .getattr        = f2fs_encrypted_symlink_getattr,
1312         .setattr        = f2fs_setattr,
1313         .listxattr      = f2fs_listxattr,
1314 };
1315
1316 const struct inode_operations f2fs_dir_inode_operations = {
1317         .create         = f2fs_create,
1318         .lookup         = f2fs_lookup,
1319         .link           = f2fs_link,
1320         .unlink         = f2fs_unlink,
1321         .symlink        = f2fs_symlink,
1322         .mkdir          = f2fs_mkdir,
1323         .rmdir          = f2fs_rmdir,
1324         .mknod          = f2fs_mknod,
1325         .rename         = f2fs_rename2,
1326         .tmpfile        = f2fs_tmpfile,
1327         .getattr        = f2fs_getattr,
1328         .setattr        = f2fs_setattr,
1329         .get_inode_acl  = f2fs_get_acl,
1330         .set_acl        = f2fs_set_acl,
1331         .listxattr      = f2fs_listxattr,
1332         .fiemap         = f2fs_fiemap,
1333         .fileattr_get   = f2fs_fileattr_get,
1334         .fileattr_set   = f2fs_fileattr_set,
1335 };
1336
1337 const struct inode_operations f2fs_symlink_inode_operations = {
1338         .get_link       = f2fs_get_link,
1339         .getattr        = f2fs_getattr,
1340         .setattr        = f2fs_setattr,
1341         .listxattr      = f2fs_listxattr,
1342 };
1343
1344 const struct inode_operations f2fs_special_inode_operations = {
1345         .getattr        = f2fs_getattr,
1346         .setattr        = f2fs_setattr,
1347         .get_inode_acl  = f2fs_get_acl,
1348         .set_acl        = f2fs_set_acl,
1349         .listxattr      = f2fs_listxattr,
1350 };