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 user_namespace *mnt_userns,
 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(mnt_userns, 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 user_namespace *mnt_userns = mnt_idmap_owner(idmap);
 340         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 341         struct inode *inode;
 342         nid_t ino = 0;
 343         int err;
 344
 345         if (unlikely(f2fs_cp_error(sbi)))
 346                 return -EIO;
 347         if (!f2fs_is_checkpoint_ready(sbi))
 348                 return -ENOSPC;
 349
 350         err = f2fs_dquot_initialize(dir);
 351         if (err)
 352                 return err;
 353
 354         inode = f2fs_new_inode(mnt_userns, dir, mode, dentry->d_name.name);
 355         if (IS_ERR(inode))
 356                 return PTR_ERR(inode);
 357
 358         inode->i_op = &f2fs_file_inode_operations;
 359         inode->i_fop = &f2fs_file_operations;
 360         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 361         ino = inode->i_ino;
 362
 363         f2fs_lock_op(sbi);
 364         err = f2fs_add_link(dentry, inode);
 365         if (err)
 366                 goto out;
 367         f2fs_unlock_op(sbi);
 368
 369         f2fs_alloc_nid_done(sbi, ino);
 370
 371         d_instantiate_new(dentry, inode);
 372
 373         if (IS_DIRSYNC(dir))
 374                 f2fs_sync_fs(sbi->sb, 1);
 375
 376         f2fs_balance_fs(sbi, true);
 377         return 0;
 378 out:
 379         f2fs_handle_failed_inode(inode);
 380         return err;
 381 }
 382
 383 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
 384                 struct dentry *dentry)
 385 {
 386         struct inode *inode = d_inode(old_dentry);
 387         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 388         int err;
 389
 390         if (unlikely(f2fs_cp_error(sbi)))
 391                 return -EIO;
 392         if (!f2fs_is_checkpoint_ready(sbi))
 393                 return -ENOSPC;
 394
 395         err = fscrypt_prepare_link(old_dentry, dir, dentry);
 396         if (err)
 397                 return err;
 398
 399         if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
 400                         (!projid_eq(F2FS_I(dir)->i_projid,
 401                         F2FS_I(old_dentry->d_inode)->i_projid)))
 402                 return -EXDEV;
 403
 404         err = f2fs_dquot_initialize(dir);
 405         if (err)
 406                 return err;
 407
 408         f2fs_balance_fs(sbi, true);
 409
 410         inode->i_ctime = current_time(inode);
 411         ihold(inode);
 412
 413         set_inode_flag(inode, FI_INC_LINK);
 414         f2fs_lock_op(sbi);
 415         err = f2fs_add_link(dentry, inode);
 416         if (err)
 417                 goto out;
 418         f2fs_unlock_op(sbi);
 419
 420         d_instantiate(dentry, inode);
 421
 422         if (IS_DIRSYNC(dir))
 423                 f2fs_sync_fs(sbi->sb, 1);
 424         return 0;
 425 out:
 426         clear_inode_flag(inode, FI_INC_LINK);
 427         iput(inode);
 428         f2fs_unlock_op(sbi);
 429         return err;
 430 }
 431
 432 struct dentry *f2fs_get_parent(struct dentry *child)
 433 {
 434         struct page *page;
 435         unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
 436
 437         if (!ino) {
 438                 if (IS_ERR(page))
 439                         return ERR_CAST(page);
 440                 return ERR_PTR(-ENOENT);
 441         }
 442         return d_obtain_alias(f2fs_iget(child->d_sb, ino));
 443 }
 444
 445 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
 446 {
 447         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 448         struct qstr dot = QSTR_INIT(".", 1);
 449         struct qstr dotdot = QSTR_INIT("..", 2);
 450         struct f2fs_dir_entry *de;
 451         struct page *page;
 452         int err = 0;
 453
 454         if (f2fs_readonly(sbi->sb)) {
 455                 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
 456                           dir->i_ino, pino);
 457                 return 0;
 458         }
 459
 460         if (!S_ISDIR(dir->i_mode)) {
 461                 f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)",
 462                           dir->i_ino, dir->i_mode, pino);
 463                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 464                 return -ENOTDIR;
 465         }
 466
 467         err = f2fs_dquot_initialize(dir);
 468         if (err)
 469                 return err;
 470
 471         f2fs_balance_fs(sbi, true);
 472
 473         f2fs_lock_op(sbi);
 474
 475         de = f2fs_find_entry(dir, &dot, &page);
 476         if (de) {
 477                 f2fs_put_page(page, 0);
 478         } else if (IS_ERR(page)) {
 479                 err = PTR_ERR(page);
 480                 goto out;
 481         } else {
 482                 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
 483                 if (err)
 484                         goto out;
 485         }
 486
 487         de = f2fs_find_entry(dir, &dotdot, &page);
 488         if (de)
 489                 f2fs_put_page(page, 0);
 490         else if (IS_ERR(page))
 491                 err = PTR_ERR(page);
 492         else
 493                 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
 494 out:
 495         if (!err)
 496                 clear_inode_flag(dir, FI_INLINE_DOTS);
 497
 498         f2fs_unlock_op(sbi);
 499         return err;
 500 }
 501
 502 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 503                 unsigned int flags)
 504 {
 505         struct inode *inode = NULL;
 506         struct f2fs_dir_entry *de;
 507         struct page *page;
 508         struct dentry *new;
 509         nid_t ino = -1;
 510         int err = 0;
 511         unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
 512         struct f2fs_filename fname;
 513
 514         trace_f2fs_lookup_start(dir, dentry, flags);
 515
 516         if (dentry->d_name.len > F2FS_NAME_LEN) {
 517                 err = -ENAMETOOLONG;
 518                 goto out;
 519         }
 520
 521         err = f2fs_prepare_lookup(dir, dentry, &fname);
 522         generic_set_encrypted_ci_d_ops(dentry);
 523         if (err == -ENOENT)
 524                 goto out_splice;
 525         if (err)
 526                 goto out;
 527         de = __f2fs_find_entry(dir, &fname, &page);
 528         f2fs_free_filename(&fname);
 529
 530         if (!de) {
 531                 if (IS_ERR(page)) {
 532                         err = PTR_ERR(page);
 533                         goto out;
 534                 }
 535                 err = -ENOENT;
 536                 goto out_splice;
 537         }
 538
 539         ino = le32_to_cpu(de->ino);
 540         f2fs_put_page(page, 0);
 541
 542         inode = f2fs_iget(dir->i_sb, ino);
 543         if (IS_ERR(inode)) {
 544                 err = PTR_ERR(inode);
 545                 goto out;
 546         }
 547
 548         if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
 549                 err = __recover_dot_dentries(dir, root_ino);
 550                 if (err)
 551                         goto out_iput;
 552         }
 553
 554         if (f2fs_has_inline_dots(inode)) {
 555                 err = __recover_dot_dentries(inode, dir->i_ino);
 556                 if (err)
 557                         goto out_iput;
 558         }
 559         if (IS_ENCRYPTED(dir) &&
 560             (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 561             !fscrypt_has_permitted_context(dir, inode)) {
 562                 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
 563                           dir->i_ino, inode->i_ino);
 564                 err = -EPERM;
 565                 goto out_iput;
 566         }
 567 out_splice:
 568 #if IS_ENABLED(CONFIG_UNICODE)
 569         if (!inode && IS_CASEFOLDED(dir)) {
 570                 /* Eventually we want to call d_add_ci(dentry, NULL)
 571                  * for negative dentries in the encoding case as
 572                  * well.  For now, prevent the negative dentry
 573                  * from being cached.
 574                  */
 575                 trace_f2fs_lookup_end(dir, dentry, ino, err);
 576                 return NULL;
 577         }
 578 #endif
 579         new = d_splice_alias(inode, dentry);
 580         err = PTR_ERR_OR_ZERO(new);
 581         trace_f2fs_lookup_end(dir, dentry, ino, !new ? -ENOENT : err);
 582         return new;
 583 out_iput:
 584         iput(inode);
 585 out:
 586         trace_f2fs_lookup_end(dir, dentry, ino, err);
 587         return ERR_PTR(err);
 588 }
 589
 590 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 591 {
 592         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 593         struct inode *inode = d_inode(dentry);
 594         struct f2fs_dir_entry *de;
 595         struct page *page;
 596         int err;
 597
 598         trace_f2fs_unlink_enter(dir, dentry);
 599
 600         if (unlikely(f2fs_cp_error(sbi))) {
 601                 err = -EIO;
 602                 goto fail;
 603         }
 604
 605         err = f2fs_dquot_initialize(dir);
 606         if (err)
 607                 goto fail;
 608         err = f2fs_dquot_initialize(inode);
 609         if (err)
 610                 goto fail;
 611
 612         de = f2fs_find_entry(dir, &dentry->d_name, &page);
 613         if (!de) {
 614                 if (IS_ERR(page))
 615                         err = PTR_ERR(page);
 616                 goto fail;
 617         }
 618
 619         f2fs_balance_fs(sbi, true);
 620
 621         f2fs_lock_op(sbi);
 622         err = f2fs_acquire_orphan_inode(sbi);
 623         if (err) {
 624                 f2fs_unlock_op(sbi);
 625                 f2fs_put_page(page, 0);
 626                 goto fail;
 627         }
 628         f2fs_delete_entry(de, page, dir, inode);
 629         f2fs_unlock_op(sbi);
 630
 631 #if IS_ENABLED(CONFIG_UNICODE)
 632         /* VFS negative dentries are incompatible with Encoding and
 633          * Case-insensitiveness. Eventually we'll want avoid
 634          * invalidating the dentries here, alongside with returning the
 635          * negative dentries at f2fs_lookup(), when it is better
 636          * supported by the VFS for the CI case.
 637          */
 638         if (IS_CASEFOLDED(dir))
 639                 d_invalidate(dentry);
 640 #endif
 641         if (IS_DIRSYNC(dir))
 642                 f2fs_sync_fs(sbi->sb, 1);
 643 fail:
 644         trace_f2fs_unlink_exit(inode, err);
 645         return err;
 646 }
 647
 648 static const char *f2fs_get_link(struct dentry *dentry,
 649                                  struct inode *inode,
 650                                  struct delayed_call *done)
 651 {
 652         const char *link = page_get_link(dentry, inode, done);
 653
 654         if (!IS_ERR(link) && !*link) {
 655                 /* this is broken symlink case */
 656                 do_delayed_call(done);
 657                 clear_delayed_call(done);
 658                 link = ERR_PTR(-ENOENT);
 659         }
 660         return link;
 661 }
 662
 663 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
 664                         struct dentry *dentry, const char *symname)
 665 {
 666         struct user_namespace *mnt_userns = mnt_idmap_owner(idmap);
 667         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 668         struct inode *inode;
 669         size_t len = strlen(symname);
 670         struct fscrypt_str disk_link;
 671         int err;
 672
 673         if (unlikely(f2fs_cp_error(sbi)))
 674                 return -EIO;
 675         if (!f2fs_is_checkpoint_ready(sbi))
 676                 return -ENOSPC;
 677
 678         err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
 679                                       &disk_link);
 680         if (err)
 681                 return err;
 682
 683         err = f2fs_dquot_initialize(dir);
 684         if (err)
 685                 return err;
 686
 687         inode = f2fs_new_inode(mnt_userns, dir, S_IFLNK | S_IRWXUGO, NULL);
 688         if (IS_ERR(inode))
 689                 return PTR_ERR(inode);
 690
 691         if (IS_ENCRYPTED(inode))
 692                 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 693         else
 694                 inode->i_op = &f2fs_symlink_inode_operations;
 695         inode_nohighmem(inode);
 696         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 697
 698         f2fs_lock_op(sbi);
 699         err = f2fs_add_link(dentry, inode);
 700         if (err)
 701                 goto out_f2fs_handle_failed_inode;
 702         f2fs_unlock_op(sbi);
 703         f2fs_alloc_nid_done(sbi, inode->i_ino);
 704
 705         err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
 706         if (err)
 707                 goto err_out;
 708
 709         err = page_symlink(inode, disk_link.name, disk_link.len);
 710
 711 err_out:
 712         d_instantiate_new(dentry, inode);
 713
 714         /*
 715          * Let's flush symlink data in order to avoid broken symlink as much as
 716          * possible. Nevertheless, fsyncing is the best way, but there is no
 717          * way to get a file descriptor in order to flush that.
 718          *
 719          * Note that, it needs to do dir->fsync to make this recoverable.
 720          * If the symlink path is stored into inline_data, there is no
 721          * performance regression.
 722          */
 723         if (!err) {
 724                 filemap_write_and_wait_range(inode->i_mapping, 0,
 725                                                         disk_link.len - 1);
 726
 727                 if (IS_DIRSYNC(dir))
 728                         f2fs_sync_fs(sbi->sb, 1);
 729         } else {
 730                 f2fs_unlink(dir, dentry);
 731         }
 732
 733         f2fs_balance_fs(sbi, true);
 734         goto out_free_encrypted_link;
 735
 736 out_f2fs_handle_failed_inode:
 737         f2fs_handle_failed_inode(inode);
 738 out_free_encrypted_link:
 739         if (disk_link.name != (unsigned char *)symname)
 740                 kfree(disk_link.name);
 741         return err;
 742 }
 743
 744 static int f2fs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
 745                       struct dentry *dentry, umode_t mode)
 746 {
 747         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 748         struct inode *inode;
 749         int err;
 750
 751         if (unlikely(f2fs_cp_error(sbi)))
 752                 return -EIO;
 753
 754         err = f2fs_dquot_initialize(dir);
 755         if (err)
 756                 return err;
 757
 758         inode = f2fs_new_inode(mnt_userns, dir, S_IFDIR | mode, NULL);
 759         if (IS_ERR(inode))
 760                 return PTR_ERR(inode);
 761
 762         inode->i_op = &f2fs_dir_inode_operations;
 763         inode->i_fop = &f2fs_dir_operations;
 764         inode->i_mapping->a_ops = &f2fs_dblock_aops;
 765         mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 766
 767         set_inode_flag(inode, FI_INC_LINK);
 768         f2fs_lock_op(sbi);
 769         err = f2fs_add_link(dentry, inode);
 770         if (err)
 771                 goto out_fail;
 772         f2fs_unlock_op(sbi);
 773
 774         f2fs_alloc_nid_done(sbi, inode->i_ino);
 775
 776         d_instantiate_new(dentry, inode);
 777
 778         if (IS_DIRSYNC(dir))
 779                 f2fs_sync_fs(sbi->sb, 1);
 780
 781         f2fs_balance_fs(sbi, true);
 782         return 0;
 783
 784 out_fail:
 785         clear_inode_flag(inode, FI_INC_LINK);
 786         f2fs_handle_failed_inode(inode);
 787         return err;
 788 }
 789
 790 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
 791 {
 792         struct inode *inode = d_inode(dentry);
 793
 794         if (f2fs_empty_dir(inode))
 795                 return f2fs_unlink(dir, dentry);
 796         return -ENOTEMPTY;
 797 }
 798
 799 static int f2fs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
 800                       struct dentry *dentry, umode_t mode, dev_t rdev)
 801 {
 802         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 803         struct inode *inode;
 804         int err = 0;
 805
 806         if (unlikely(f2fs_cp_error(sbi)))
 807                 return -EIO;
 808         if (!f2fs_is_checkpoint_ready(sbi))
 809                 return -ENOSPC;
 810
 811         err = f2fs_dquot_initialize(dir);
 812         if (err)
 813                 return err;
 814
 815         inode = f2fs_new_inode(mnt_userns, dir, mode, NULL);
 816         if (IS_ERR(inode))
 817                 return PTR_ERR(inode);
 818
 819         init_special_inode(inode, inode->i_mode, rdev);
 820         inode->i_op = &f2fs_special_inode_operations;
 821
 822         f2fs_lock_op(sbi);
 823         err = f2fs_add_link(dentry, inode);
 824         if (err)
 825                 goto out;
 826         f2fs_unlock_op(sbi);
 827
 828         f2fs_alloc_nid_done(sbi, inode->i_ino);
 829
 830         d_instantiate_new(dentry, inode);
 831
 832         if (IS_DIRSYNC(dir))
 833                 f2fs_sync_fs(sbi->sb, 1);
 834
 835         f2fs_balance_fs(sbi, true);
 836         return 0;
 837 out:
 838         f2fs_handle_failed_inode(inode);
 839         return err;
 840 }
 841
 842 static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
 843                           struct file *file, umode_t mode, bool is_whiteout,
 844                           struct inode **new_inode)
 845 {
 846         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 847         struct inode *inode;
 848         int err;
 849
 850         err = f2fs_dquot_initialize(dir);
 851         if (err)
 852                 return err;
 853
 854         inode = f2fs_new_inode(mnt_userns, dir, mode, NULL);
 855         if (IS_ERR(inode))
 856                 return PTR_ERR(inode);
 857
 858         if (is_whiteout) {
 859                 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
 860                 inode->i_op = &f2fs_special_inode_operations;
 861         } else {
 862                 inode->i_op = &f2fs_file_inode_operations;
 863                 inode->i_fop = &f2fs_file_operations;
 864                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 865         }
 866
 867         f2fs_lock_op(sbi);
 868         err = f2fs_acquire_orphan_inode(sbi);
 869         if (err)
 870                 goto out;
 871
 872         err = f2fs_do_tmpfile(inode, dir);
 873         if (err)
 874                 goto release_out;
 875
 876         /*
 877          * add this non-linked tmpfile to orphan list, in this way we could
 878          * remove all unused data of tmpfile after abnormal power-off.
 879          */
 880         f2fs_add_orphan_inode(inode);
 881         f2fs_alloc_nid_done(sbi, inode->i_ino);
 882
 883         if (is_whiteout) {
 884                 f2fs_i_links_write(inode, false);
 885
 886                 spin_lock(&inode->i_lock);
 887                 inode->i_state |= I_LINKABLE;
 888                 spin_unlock(&inode->i_lock);
 889         } else {
 890                 if (file)
 891                         d_tmpfile(file, inode);
 892                 else
 893                         f2fs_i_links_write(inode, false);
 894         }
 895         /* link_count was changed by d_tmpfile as well. */
 896         f2fs_unlock_op(sbi);
 897         unlock_new_inode(inode);
 898
 899         if (new_inode)
 900                 *new_inode = inode;
 901
 902         f2fs_balance_fs(sbi, true);
 903         return 0;
 904
 905 release_out:
 906         f2fs_release_orphan_inode(sbi);
 907 out:
 908         f2fs_handle_failed_inode(inode);
 909         return err;
 910 }
 911
 912 static int f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
 913                         struct file *file, umode_t mode)
 914 {
 915         struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
 916         int err;
 917
 918         if (unlikely(f2fs_cp_error(sbi)))
 919                 return -EIO;
 920         if (!f2fs_is_checkpoint_ready(sbi))
 921                 return -ENOSPC;
 922
 923         err = __f2fs_tmpfile(mnt_userns, dir, file, mode, false, NULL);
 924
 925         return finish_open_simple(file, err);
 926 }
 927
 928 static int f2fs_create_whiteout(struct user_namespace *mnt_userns,
 929                                 struct inode *dir, struct inode **whiteout)
 930 {
 931         if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
 932                 return -EIO;
 933
 934         return __f2fs_tmpfile(mnt_userns, dir, NULL,
 935                                 S_IFCHR | WHITEOUT_MODE, true, whiteout);
 936 }
 937
 938 int f2fs_get_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
 939                      struct inode **new_inode)
 940 {
 941         return __f2fs_tmpfile(mnt_userns, dir, NULL, S_IFREG, false, new_inode);
 942 }
 943
 944 static int f2fs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
 945                         struct dentry *old_dentry, struct inode *new_dir,
 946                         struct dentry *new_dentry, unsigned int flags)
 947 {
 948         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
 949         struct inode *old_inode = d_inode(old_dentry);
 950         struct inode *new_inode = d_inode(new_dentry);
 951         struct inode *whiteout = NULL;
 952         struct page *old_dir_page = NULL;
 953         struct page *old_page, *new_page = NULL;
 954         struct f2fs_dir_entry *old_dir_entry = NULL;
 955         struct f2fs_dir_entry *old_entry;
 956         struct f2fs_dir_entry *new_entry;
 957         int err;
 958
 959         if (unlikely(f2fs_cp_error(sbi)))
 960                 return -EIO;
 961         if (!f2fs_is_checkpoint_ready(sbi))
 962                 return -ENOSPC;
 963
 964         if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
 965                         (!projid_eq(F2FS_I(new_dir)->i_projid,
 966                         F2FS_I(old_dentry->d_inode)->i_projid)))
 967                 return -EXDEV;
 968
 969         /*
 970          * If new_inode is null, the below renaming flow will
 971          * add a link in old_dir which can conver inline_dir.
 972          * After then, if we failed to get the entry due to other
 973          * reasons like ENOMEM, we had to remove the new entry.
 974          * Instead of adding such the error handling routine, let's
 975          * simply convert first here.
 976          */
 977         if (old_dir == new_dir && !new_inode) {
 978                 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
 979                 if (err)
 980                         return err;
 981         }
 982
 983         if (flags & RENAME_WHITEOUT) {
 984                 err = f2fs_create_whiteout(mnt_userns, old_dir, &whiteout);
 985                 if (err)
 986                         return err;
 987         }
 988
 989         err = f2fs_dquot_initialize(old_dir);
 990         if (err)
 991                 goto out;
 992
 993         err = f2fs_dquot_initialize(new_dir);
 994         if (err)
 995                 goto out;
 996
 997         if (new_inode) {
 998                 err = f2fs_dquot_initialize(new_inode);
 999                 if (err)
1000                         goto out;
1001         }
1002
1003         err = -ENOENT;
1004         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1005         if (!old_entry) {
1006                 if (IS_ERR(old_page))
1007                         err = PTR_ERR(old_page);
1008                 goto out;
1009         }
1010
1011         if (S_ISDIR(old_inode->i_mode)) {
1012                 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
1013                 if (!old_dir_entry) {
1014                         if (IS_ERR(old_dir_page))
1015                                 err = PTR_ERR(old_dir_page);
1016                         goto out_old;
1017                 }
1018         }
1019
1020         if (new_inode) {
1021
1022                 err = -ENOTEMPTY;
1023                 if (old_dir_entry && !f2fs_empty_dir(new_inode))
1024                         goto out_dir;
1025
1026                 err = -ENOENT;
1027                 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1028                                                 &new_page);
1029                 if (!new_entry) {
1030                         if (IS_ERR(new_page))
1031                                 err = PTR_ERR(new_page);
1032                         goto out_dir;
1033                 }
1034
1035                 f2fs_balance_fs(sbi, true);
1036
1037                 f2fs_lock_op(sbi);
1038
1039                 err = f2fs_acquire_orphan_inode(sbi);
1040                 if (err)
1041                         goto put_out_dir;
1042
1043                 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1044                 new_page = NULL;
1045
1046                 new_inode->i_ctime = current_time(new_inode);
1047                 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1048                 if (old_dir_entry)
1049                         f2fs_i_links_write(new_inode, false);
1050                 f2fs_i_links_write(new_inode, false);
1051                 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1052
1053                 if (!new_inode->i_nlink)
1054                         f2fs_add_orphan_inode(new_inode);
1055                 else
1056                         f2fs_release_orphan_inode(sbi);
1057         } else {
1058                 f2fs_balance_fs(sbi, true);
1059
1060                 f2fs_lock_op(sbi);
1061
1062                 err = f2fs_add_link(new_dentry, old_inode);
1063                 if (err) {
1064                         f2fs_unlock_op(sbi);
1065                         goto out_dir;
1066                 }
1067
1068                 if (old_dir_entry)
1069                         f2fs_i_links_write(new_dir, true);
1070         }
1071
1072         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1073         if (!old_dir_entry || whiteout)
1074                 file_lost_pino(old_inode);
1075         else
1076                 /* adjust dir's i_pino to pass fsck check */
1077                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1078         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1079
1080         old_inode->i_ctime = current_time(old_inode);
1081         f2fs_mark_inode_dirty_sync(old_inode, false);
1082
1083         f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1084         old_page = NULL;
1085
1086         if (whiteout) {
1087                 set_inode_flag(whiteout, FI_INC_LINK);
1088                 err = f2fs_add_link(old_dentry, whiteout);
1089                 if (err)
1090                         goto put_out_dir;
1091
1092                 spin_lock(&whiteout->i_lock);
1093                 whiteout->i_state &= ~I_LINKABLE;
1094                 spin_unlock(&whiteout->i_lock);
1095
1096                 iput(whiteout);
1097         }
1098
1099         if (old_dir_entry) {
1100                 if (old_dir != new_dir && !whiteout)
1101                         f2fs_set_link(old_inode, old_dir_entry,
1102                                                 old_dir_page, new_dir);
1103                 else
1104                         f2fs_put_page(old_dir_page, 0);
1105                 f2fs_i_links_write(old_dir, false);
1106         }
1107         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1108                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1109                 if (S_ISDIR(old_inode->i_mode))
1110                         f2fs_add_ino_entry(sbi, old_inode->i_ino,
1111                                                         TRANS_DIR_INO);
1112         }
1113
1114         f2fs_unlock_op(sbi);
1115
1116         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1117                 f2fs_sync_fs(sbi->sb, 1);
1118
1119         f2fs_update_time(sbi, REQ_TIME);
1120         return 0;
1121
1122 put_out_dir:
1123         f2fs_unlock_op(sbi);
1124         f2fs_put_page(new_page, 0);
1125 out_dir:
1126         if (old_dir_entry)
1127                 f2fs_put_page(old_dir_page, 0);
1128 out_old:
1129         f2fs_put_page(old_page, 0);
1130 out:
1131         iput(whiteout);
1132         return err;
1133 }
1134
1135 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1136                              struct inode *new_dir, struct dentry *new_dentry)
1137 {
1138         struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1139         struct inode *old_inode = d_inode(old_dentry);
1140         struct inode *new_inode = d_inode(new_dentry);
1141         struct page *old_dir_page, *new_dir_page;
1142         struct page *old_page, *new_page;
1143         struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1144         struct f2fs_dir_entry *old_entry, *new_entry;
1145         int old_nlink = 0, new_nlink = 0;
1146         int err;
1147
1148         if (unlikely(f2fs_cp_error(sbi)))
1149                 return -EIO;
1150         if (!f2fs_is_checkpoint_ready(sbi))
1151                 return -ENOSPC;
1152
1153         if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1154                         !projid_eq(F2FS_I(new_dir)->i_projid,
1155                         F2FS_I(old_dentry->d_inode)->i_projid)) ||
1156             (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1157                         !projid_eq(F2FS_I(old_dir)->i_projid,
1158                         F2FS_I(new_dentry->d_inode)->i_projid)))
1159                 return -EXDEV;
1160
1161         err = f2fs_dquot_initialize(old_dir);
1162         if (err)
1163                 goto out;
1164
1165         err = f2fs_dquot_initialize(new_dir);
1166         if (err)
1167                 goto out;
1168
1169         err = -ENOENT;
1170         old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1171         if (!old_entry) {
1172                 if (IS_ERR(old_page))
1173                         err = PTR_ERR(old_page);
1174                 goto out;
1175         }
1176
1177         new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1178         if (!new_entry) {
1179                 if (IS_ERR(new_page))
1180                         err = PTR_ERR(new_page);
1181                 goto out_old;
1182         }
1183
1184         /* prepare for updating ".." directory entry info later */
1185         if (old_dir != new_dir) {
1186                 if (S_ISDIR(old_inode->i_mode)) {
1187                         old_dir_entry = f2fs_parent_dir(old_inode,
1188                                                         &old_dir_page);
1189                         if (!old_dir_entry) {
1190                                 if (IS_ERR(old_dir_page))
1191                                         err = PTR_ERR(old_dir_page);
1192                                 goto out_new;
1193                         }
1194                 }
1195
1196                 if (S_ISDIR(new_inode->i_mode)) {
1197                         new_dir_entry = f2fs_parent_dir(new_inode,
1198                                                         &new_dir_page);
1199                         if (!new_dir_entry) {
1200                                 if (IS_ERR(new_dir_page))
1201                                         err = PTR_ERR(new_dir_page);
1202                                 goto out_old_dir;
1203                         }
1204                 }
1205         }
1206
1207         /*
1208          * If cross rename between file and directory those are not
1209          * in the same directory, we will inc nlink of file's parent
1210          * later, so we should check upper boundary of its nlink.
1211          */
1212         if ((!old_dir_entry || !new_dir_entry) &&
1213                                 old_dir_entry != new_dir_entry) {
1214                 old_nlink = old_dir_entry ? -1 : 1;
1215                 new_nlink = -old_nlink;
1216                 err = -EMLINK;
1217                 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1218                         (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1219                         goto out_new_dir;
1220         }
1221
1222         f2fs_balance_fs(sbi, true);
1223
1224         f2fs_lock_op(sbi);
1225
1226         /* update ".." directory entry info of old dentry */
1227         if (old_dir_entry)
1228                 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1229
1230         /* update ".." directory entry info of new dentry */
1231         if (new_dir_entry)
1232                 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1233
1234         /* update directory entry info of old dir inode */
1235         f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1236
1237         f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1238         if (!old_dir_entry)
1239                 file_lost_pino(old_inode);
1240         else
1241                 /* adjust dir's i_pino to pass fsck check */
1242                 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1243         f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1244
1245         old_dir->i_ctime = current_time(old_dir);
1246         if (old_nlink) {
1247                 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1248                 f2fs_i_links_write(old_dir, old_nlink > 0);
1249                 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1250         }
1251         f2fs_mark_inode_dirty_sync(old_dir, false);
1252
1253         /* update directory entry info of new dir inode */
1254         f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1255
1256         f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1257         if (!new_dir_entry)
1258                 file_lost_pino(new_inode);
1259         else
1260                 /* adjust dir's i_pino to pass fsck check */
1261                 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1262         f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1263
1264         new_dir->i_ctime = current_time(new_dir);
1265         if (new_nlink) {
1266                 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1267                 f2fs_i_links_write(new_dir, new_nlink > 0);
1268                 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1269         }
1270         f2fs_mark_inode_dirty_sync(new_dir, false);
1271
1272         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1273                 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1274                 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1275         }
1276
1277         f2fs_unlock_op(sbi);
1278
1279         if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1280                 f2fs_sync_fs(sbi->sb, 1);
1281
1282         f2fs_update_time(sbi, REQ_TIME);
1283         return 0;
1284 out_new_dir:
1285         if (new_dir_entry) {
1286                 f2fs_put_page(new_dir_page, 0);
1287         }
1288 out_old_dir:
1289         if (old_dir_entry) {
1290                 f2fs_put_page(old_dir_page, 0);
1291         }
1292 out_new:
1293         f2fs_put_page(new_page, 0);
1294 out_old:
1295         f2fs_put_page(old_page, 0);
1296 out:
1297         return err;
1298 }
1299
1300 static int f2fs_rename2(struct user_namespace *mnt_userns,
1301                         struct inode *old_dir, struct dentry *old_dentry,
1302                         struct inode *new_dir, struct dentry *new_dentry,
1303                         unsigned int flags)
1304 {
1305         int err;
1306
1307         if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1308                 return -EINVAL;
1309
1310         err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1311                                      flags);
1312         if (err)
1313                 return err;
1314
1315         if (flags & RENAME_EXCHANGE) {
1316                 return f2fs_cross_rename(old_dir, old_dentry,
1317                                          new_dir, new_dentry);
1318         }
1319         /*
1320          * VFS has already handled the new dentry existence case,
1321          * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1322          */
1323         return f2fs_rename(mnt_userns, old_dir, old_dentry,
1324                                         new_dir, new_dentry, flags);
1325 }
1326
1327 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1328                                            struct inode *inode,
1329                                            struct delayed_call *done)
1330 {
1331         struct page *page;
1332         const char *target;
1333
1334         if (!dentry)
1335                 return ERR_PTR(-ECHILD);
1336
1337         page = read_mapping_page(inode->i_mapping, 0, NULL);
1338         if (IS_ERR(page))
1339                 return ERR_CAST(page);
1340
1341         target = fscrypt_get_symlink(inode, page_address(page),
1342                                      inode->i_sb->s_blocksize, done);
1343         put_page(page);
1344         return target;
1345 }
1346
1347 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1348                                           const struct path *path,
1349                                           struct kstat *stat, u32 request_mask,
1350                                           unsigned int query_flags)
1351 {
1352         f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1353
1354         return fscrypt_symlink_getattr(path, stat);
1355 }
1356
1357 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1358         .get_link       = f2fs_encrypted_get_link,
1359         .getattr        = f2fs_encrypted_symlink_getattr,
1360         .setattr        = f2fs_setattr,
1361         .listxattr      = f2fs_listxattr,
1362 };
1363
1364 const struct inode_operations f2fs_dir_inode_operations = {
1365         .create         = f2fs_create,
1366         .lookup         = f2fs_lookup,
1367         .link           = f2fs_link,
1368         .unlink         = f2fs_unlink,
1369         .symlink        = f2fs_symlink,
1370         .mkdir          = f2fs_mkdir,
1371         .rmdir          = f2fs_rmdir,
1372         .mknod          = f2fs_mknod,
1373         .rename         = f2fs_rename2,
1374         .tmpfile        = f2fs_tmpfile,
1375         .getattr        = f2fs_getattr,
1376         .setattr        = f2fs_setattr,
1377         .get_inode_acl  = f2fs_get_acl,
1378         .set_acl        = f2fs_set_acl,
1379         .listxattr      = f2fs_listxattr,
1380         .fiemap         = f2fs_fiemap,
1381         .fileattr_get   = f2fs_fileattr_get,
1382         .fileattr_set   = f2fs_fileattr_set,
1383 };
1384
1385 const struct inode_operations f2fs_symlink_inode_operations = {
1386         .get_link       = f2fs_get_link,
1387         .getattr        = f2fs_getattr,
1388         .setattr        = f2fs_setattr,
1389         .listxattr      = f2fs_listxattr,
1390 };
1391
1392 const struct inode_operations f2fs_special_inode_operations = {
1393         .getattr        = f2fs_getattr,
1394         .setattr        = f2fs_setattr,
1395         .get_inode_acl  = f2fs_get_acl,
1396         .set_acl        = f2fs_set_acl,
1397         .listxattr      = f2fs_listxattr,
1398 };