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