4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
13 #include <linux/pagemap.h>
14 #include <linux/sched.h>
15 #include <linux/ctype.h>
16 #include <linux/dcache.h>
17 #include <linux/namei.h>
18 #include <linux/quotaops.h>
24 #include <trace/events/f2fs.h>
26 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
28 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
31 bool nid_free = false;
35 inode = new_inode(dir->i_sb);
37 return ERR_PTR(-ENOMEM);
40 if (!alloc_nid(sbi, &ino)) {
49 inode_init_owner(inode, dir, mode);
53 inode->i_mtime = inode->i_atime = inode->i_ctime =
54 F2FS_I(inode)->i_crtime = current_time(inode);
55 inode->i_generation = sbi->s_next_generation++;
57 err = insert_inode_locked(inode);
63 if (f2fs_sb_has_project_quota(sbi->sb) &&
64 (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL))
65 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
67 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
70 err = dquot_initialize(inode);
74 err = dquot_alloc_inode(inode);
78 set_inode_flag(inode, FI_NEW_INODE);
80 /* If the directory encrypted, then we should encrypt the inode. */
81 if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
82 f2fs_set_encrypted_inode(inode);
84 if (f2fs_sb_has_extra_attr(sbi->sb)) {
85 set_inode_flag(inode, FI_EXTRA_ATTR);
86 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
89 if (test_opt(sbi, INLINE_XATTR))
90 set_inode_flag(inode, FI_INLINE_XATTR);
92 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
93 set_inode_flag(inode, FI_INLINE_DATA);
94 if (f2fs_may_inline_dentry(inode))
95 set_inode_flag(inode, FI_INLINE_DENTRY);
97 if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
98 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
99 if (f2fs_has_inline_xattr(inode))
100 xattr_size = sbi->inline_xattr_size;
101 /* Otherwise, will be 0 */
102 } else if (f2fs_has_inline_xattr(inode) ||
103 f2fs_has_inline_dentry(inode)) {
104 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
106 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
108 f2fs_init_extent_tree(inode, NULL);
110 stat_inc_inline_xattr(inode);
111 stat_inc_inline_inode(inode);
112 stat_inc_inline_dir(inode);
114 F2FS_I(inode)->i_flags =
115 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
117 if (S_ISDIR(inode->i_mode))
118 F2FS_I(inode)->i_flags |= FS_INDEX_FL;
120 if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL)
121 set_inode_flag(inode, FI_PROJ_INHERIT);
123 trace_f2fs_new_inode(inode, 0);
127 trace_f2fs_new_inode(inode, err);
128 make_bad_inode(inode);
130 set_inode_flag(inode, FI_FREE_NID);
134 trace_f2fs_new_inode(inode, err);
136 inode->i_flags |= S_NOQUOTA;
138 set_inode_flag(inode, FI_FREE_NID);
140 unlock_new_inode(inode);
145 static int is_multimedia_file(const unsigned char *s, const char *sub)
147 size_t slen = strlen(s);
148 size_t sublen = strlen(sub);
152 * filename format of multimedia file should be defined as:
153 * "filename + '.' + extension + (optional: '.' + temp extension)".
155 if (slen < sublen + 2)
158 for (i = 1; i < slen - sublen; i++) {
161 if (!strncasecmp(s + i + 1, sub, sublen))
169 * Set multimedia files as cold files for hot/cold data separation
171 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
172 const unsigned char *name)
175 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
177 int count = le32_to_cpu(sbi->raw_super->extension_count);
178 for (i = 0; i < count; i++) {
179 if (is_multimedia_file(name, extlist[i])) {
180 file_set_cold(inode);
186 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
189 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
194 if (unlikely(f2fs_cp_error(sbi)))
197 err = dquot_initialize(dir);
201 inode = f2fs_new_inode(dir, mode);
203 return PTR_ERR(inode);
205 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
206 set_cold_files(sbi, inode, dentry->d_name.name);
208 inode->i_op = &f2fs_file_inode_operations;
209 inode->i_fop = &f2fs_file_operations;
210 inode->i_mapping->a_ops = &f2fs_dblock_aops;
214 err = f2fs_add_link(dentry, inode);
219 alloc_nid_done(sbi, ino);
221 d_instantiate(dentry, inode);
222 unlock_new_inode(inode);
225 f2fs_sync_fs(sbi->sb, 1);
227 f2fs_balance_fs(sbi, true);
230 handle_failed_inode(inode);
234 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
235 struct dentry *dentry)
237 struct inode *inode = d_inode(old_dentry);
238 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
241 if (unlikely(f2fs_cp_error(sbi)))
244 err = fscrypt_prepare_link(old_dentry, dir, dentry);
248 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
249 (!projid_eq(F2FS_I(dir)->i_projid,
250 F2FS_I(old_dentry->d_inode)->i_projid)))
253 err = dquot_initialize(dir);
257 f2fs_balance_fs(sbi, true);
259 inode->i_ctime = current_time(inode);
262 set_inode_flag(inode, FI_INC_LINK);
264 err = f2fs_add_link(dentry, inode);
269 d_instantiate(dentry, inode);
272 f2fs_sync_fs(sbi->sb, 1);
275 clear_inode_flag(inode, FI_INC_LINK);
281 struct dentry *f2fs_get_parent(struct dentry *child)
283 struct qstr dotdot = QSTR_INIT("..", 2);
285 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
288 return ERR_CAST(page);
289 return ERR_PTR(-ENOENT);
291 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
294 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
296 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
297 struct qstr dot = QSTR_INIT(".", 1);
298 struct qstr dotdot = QSTR_INIT("..", 2);
299 struct f2fs_dir_entry *de;
303 if (f2fs_readonly(sbi->sb)) {
304 f2fs_msg(sbi->sb, KERN_INFO,
305 "skip recovering inline_dots inode (ino:%lu, pino:%u) "
306 "in readonly mountpoint", dir->i_ino, pino);
310 err = dquot_initialize(dir);
314 f2fs_balance_fs(sbi, true);
318 de = f2fs_find_entry(dir, &dot, &page);
320 f2fs_dentry_kunmap(dir, page);
321 f2fs_put_page(page, 0);
322 } else if (IS_ERR(page)) {
326 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
331 de = f2fs_find_entry(dir, &dotdot, &page);
333 f2fs_dentry_kunmap(dir, page);
334 f2fs_put_page(page, 0);
335 } else if (IS_ERR(page)) {
338 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
342 clear_inode_flag(dir, FI_INLINE_DOTS);
348 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
351 struct inode *inode = NULL;
352 struct f2fs_dir_entry *de;
357 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
359 trace_f2fs_lookup_start(dir, dentry, flags);
361 err = fscrypt_prepare_lookup(dir, dentry, flags);
365 if (dentry->d_name.len > F2FS_NAME_LEN) {
370 de = f2fs_find_entry(dir, &dentry->d_name, &page);
379 ino = le32_to_cpu(de->ino);
380 f2fs_dentry_kunmap(dir, page);
381 f2fs_put_page(page, 0);
383 inode = f2fs_iget(dir->i_sb, ino);
385 err = PTR_ERR(inode);
389 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
390 err = __recover_dot_dentries(dir, root_ino);
395 if (f2fs_has_inline_dots(inode)) {
396 err = __recover_dot_dentries(inode, dir->i_ino);
400 if (f2fs_encrypted_inode(dir) &&
401 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
402 !fscrypt_has_permitted_context(dir, inode)) {
403 f2fs_msg(inode->i_sb, KERN_WARNING,
404 "Inconsistent encryption contexts: %lu/%lu",
405 dir->i_ino, inode->i_ino);
410 new = d_splice_alias(inode, dentry);
413 trace_f2fs_lookup_end(dir, dentry, ino, err);
418 trace_f2fs_lookup_end(dir, dentry, ino, err);
422 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
424 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
425 struct inode *inode = d_inode(dentry);
426 struct f2fs_dir_entry *de;
430 trace_f2fs_unlink_enter(dir, dentry);
432 if (unlikely(f2fs_cp_error(sbi)))
435 err = dquot_initialize(dir);
438 err = dquot_initialize(inode);
442 de = f2fs_find_entry(dir, &dentry->d_name, &page);
449 f2fs_balance_fs(sbi, true);
452 err = acquire_orphan_inode(sbi);
455 f2fs_dentry_kunmap(dir, page);
456 f2fs_put_page(page, 0);
459 f2fs_delete_entry(de, page, dir, inode);
463 f2fs_sync_fs(sbi->sb, 1);
465 trace_f2fs_unlink_exit(inode, err);
469 static const char *f2fs_get_link(struct dentry *dentry,
471 struct delayed_call *done)
473 const char *link = page_get_link(dentry, inode, done);
474 if (!IS_ERR(link) && !*link) {
475 /* this is broken symlink case */
476 do_delayed_call(done);
477 clear_delayed_call(done);
478 link = ERR_PTR(-ENOENT);
483 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
486 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
488 size_t len = strlen(symname);
489 struct fscrypt_str disk_link;
492 if (unlikely(f2fs_cp_error(sbi)))
495 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
500 err = dquot_initialize(dir);
504 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
506 return PTR_ERR(inode);
508 if (IS_ENCRYPTED(inode))
509 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
511 inode->i_op = &f2fs_symlink_inode_operations;
512 inode_nohighmem(inode);
513 inode->i_mapping->a_ops = &f2fs_dblock_aops;
516 err = f2fs_add_link(dentry, inode);
518 goto out_handle_failed_inode;
520 alloc_nid_done(sbi, inode->i_ino);
522 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
526 err = page_symlink(inode, disk_link.name, disk_link.len);
529 d_instantiate(dentry, inode);
530 unlock_new_inode(inode);
533 * Let's flush symlink data in order to avoid broken symlink as much as
534 * possible. Nevertheless, fsyncing is the best way, but there is no
535 * way to get a file descriptor in order to flush that.
537 * Note that, it needs to do dir->fsync to make this recoverable.
538 * If the symlink path is stored into inline_data, there is no
539 * performance regression.
542 filemap_write_and_wait_range(inode->i_mapping, 0,
546 f2fs_sync_fs(sbi->sb, 1);
548 f2fs_unlink(dir, dentry);
551 f2fs_balance_fs(sbi, true);
552 goto out_free_encrypted_link;
554 out_handle_failed_inode:
555 handle_failed_inode(inode);
556 out_free_encrypted_link:
557 if (disk_link.name != (unsigned char *)symname)
558 kfree(disk_link.name);
562 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
564 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
568 if (unlikely(f2fs_cp_error(sbi)))
571 err = dquot_initialize(dir);
575 inode = f2fs_new_inode(dir, S_IFDIR | mode);
577 return PTR_ERR(inode);
579 inode->i_op = &f2fs_dir_inode_operations;
580 inode->i_fop = &f2fs_dir_operations;
581 inode->i_mapping->a_ops = &f2fs_dblock_aops;
582 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
584 set_inode_flag(inode, FI_INC_LINK);
586 err = f2fs_add_link(dentry, inode);
591 alloc_nid_done(sbi, inode->i_ino);
593 d_instantiate(dentry, inode);
594 unlock_new_inode(inode);
597 f2fs_sync_fs(sbi->sb, 1);
599 f2fs_balance_fs(sbi, true);
603 clear_inode_flag(inode, FI_INC_LINK);
604 handle_failed_inode(inode);
608 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
610 struct inode *inode = d_inode(dentry);
611 if (f2fs_empty_dir(inode))
612 return f2fs_unlink(dir, dentry);
616 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
617 umode_t mode, dev_t rdev)
619 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
623 if (unlikely(f2fs_cp_error(sbi)))
626 err = dquot_initialize(dir);
630 inode = f2fs_new_inode(dir, mode);
632 return PTR_ERR(inode);
634 init_special_inode(inode, inode->i_mode, rdev);
635 inode->i_op = &f2fs_special_inode_operations;
638 err = f2fs_add_link(dentry, inode);
643 alloc_nid_done(sbi, inode->i_ino);
645 d_instantiate(dentry, inode);
646 unlock_new_inode(inode);
649 f2fs_sync_fs(sbi->sb, 1);
651 f2fs_balance_fs(sbi, true);
654 handle_failed_inode(inode);
658 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
659 umode_t mode, struct inode **whiteout)
661 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
665 err = dquot_initialize(dir);
669 inode = f2fs_new_inode(dir, mode);
671 return PTR_ERR(inode);
674 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
675 inode->i_op = &f2fs_special_inode_operations;
677 inode->i_op = &f2fs_file_inode_operations;
678 inode->i_fop = &f2fs_file_operations;
679 inode->i_mapping->a_ops = &f2fs_dblock_aops;
683 err = acquire_orphan_inode(sbi);
687 err = f2fs_do_tmpfile(inode, dir);
692 * add this non-linked tmpfile to orphan list, in this way we could
693 * remove all unused data of tmpfile after abnormal power-off.
695 add_orphan_inode(inode);
696 alloc_nid_done(sbi, inode->i_ino);
699 f2fs_i_links_write(inode, false);
702 d_tmpfile(dentry, inode);
704 /* link_count was changed by d_tmpfile as well. */
706 unlock_new_inode(inode);
708 f2fs_balance_fs(sbi, true);
712 release_orphan_inode(sbi);
714 handle_failed_inode(inode);
718 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
720 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
723 if (f2fs_encrypted_inode(dir)) {
724 int err = fscrypt_get_encryption_info(dir);
729 return __f2fs_tmpfile(dir, dentry, mode, NULL);
732 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
734 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
737 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
740 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
741 struct inode *new_dir, struct dentry *new_dentry,
744 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
745 struct inode *old_inode = d_inode(old_dentry);
746 struct inode *new_inode = d_inode(new_dentry);
747 struct inode *whiteout = NULL;
748 struct page *old_dir_page;
749 struct page *old_page, *new_page = NULL;
750 struct f2fs_dir_entry *old_dir_entry = NULL;
751 struct f2fs_dir_entry *old_entry;
752 struct f2fs_dir_entry *new_entry;
753 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
756 if (unlikely(f2fs_cp_error(sbi)))
759 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
760 (!projid_eq(F2FS_I(new_dir)->i_projid,
761 F2FS_I(old_dentry->d_inode)->i_projid)))
764 err = dquot_initialize(old_dir);
768 err = dquot_initialize(new_dir);
773 err = dquot_initialize(new_inode);
778 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
780 if (IS_ERR(old_page))
781 err = PTR_ERR(old_page);
785 if (S_ISDIR(old_inode->i_mode)) {
786 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
787 if (!old_dir_entry) {
788 if (IS_ERR(old_dir_page))
789 err = PTR_ERR(old_dir_page);
794 if (flags & RENAME_WHITEOUT) {
795 err = f2fs_create_whiteout(old_dir, &whiteout);
803 if (old_dir_entry && !f2fs_empty_dir(new_inode))
807 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
810 if (IS_ERR(new_page))
811 err = PTR_ERR(new_page);
815 f2fs_balance_fs(sbi, true);
819 err = acquire_orphan_inode(sbi);
823 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
825 new_inode->i_ctime = current_time(new_inode);
826 down_write(&F2FS_I(new_inode)->i_sem);
828 f2fs_i_links_write(new_inode, false);
829 f2fs_i_links_write(new_inode, false);
830 up_write(&F2FS_I(new_inode)->i_sem);
832 if (!new_inode->i_nlink)
833 add_orphan_inode(new_inode);
835 release_orphan_inode(sbi);
837 f2fs_balance_fs(sbi, true);
841 err = f2fs_add_link(new_dentry, old_inode);
848 f2fs_i_links_write(new_dir, true);
851 * old entry and new entry can locate in the same inline
852 * dentry in inode, when attaching new entry in inline dentry,
853 * it could force inline dentry conversion, after that,
854 * old_entry and old_page will point to wrong address, in
855 * order to avoid this, let's do the check and update here.
857 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
858 f2fs_put_page(old_page, 0);
861 old_entry = f2fs_find_entry(old_dir,
862 &old_dentry->d_name, &old_page);
865 if (IS_ERR(old_page))
866 err = PTR_ERR(old_page);
873 down_write(&F2FS_I(old_inode)->i_sem);
874 if (!old_dir_entry || whiteout)
875 file_lost_pino(old_inode);
877 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
878 up_write(&F2FS_I(old_inode)->i_sem);
880 old_inode->i_ctime = current_time(old_inode);
881 f2fs_mark_inode_dirty_sync(old_inode, false);
883 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
886 whiteout->i_state |= I_LINKABLE;
887 set_inode_flag(whiteout, FI_INC_LINK);
888 err = f2fs_add_link(old_dentry, whiteout);
891 whiteout->i_state &= ~I_LINKABLE;
896 if (old_dir != new_dir && !whiteout) {
897 f2fs_set_link(old_inode, old_dir_entry,
898 old_dir_page, new_dir);
900 f2fs_dentry_kunmap(old_inode, old_dir_page);
901 f2fs_put_page(old_dir_page, 0);
903 f2fs_i_links_write(old_dir, false);
905 add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
909 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
910 f2fs_sync_fs(sbi->sb, 1);
916 f2fs_dentry_kunmap(new_dir, new_page);
917 f2fs_put_page(new_page, 0);
924 f2fs_dentry_kunmap(old_inode, old_dir_page);
925 f2fs_put_page(old_dir_page, 0);
928 f2fs_dentry_kunmap(old_dir, old_page);
929 f2fs_put_page(old_page, 0);
934 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
935 struct inode *new_dir, struct dentry *new_dentry)
937 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
938 struct inode *old_inode = d_inode(old_dentry);
939 struct inode *new_inode = d_inode(new_dentry);
940 struct page *old_dir_page, *new_dir_page;
941 struct page *old_page, *new_page;
942 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
943 struct f2fs_dir_entry *old_entry, *new_entry;
944 int old_nlink = 0, new_nlink = 0;
947 if (unlikely(f2fs_cp_error(sbi)))
950 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
951 !projid_eq(F2FS_I(new_dir)->i_projid,
952 F2FS_I(old_dentry->d_inode)->i_projid)) ||
953 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
954 !projid_eq(F2FS_I(old_dir)->i_projid,
955 F2FS_I(new_dentry->d_inode)->i_projid)))
958 err = dquot_initialize(old_dir);
962 err = dquot_initialize(new_dir);
966 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
968 if (IS_ERR(old_page))
969 err = PTR_ERR(old_page);
973 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
975 if (IS_ERR(new_page))
976 err = PTR_ERR(new_page);
980 /* prepare for updating ".." directory entry info later */
981 if (old_dir != new_dir) {
982 if (S_ISDIR(old_inode->i_mode)) {
983 old_dir_entry = f2fs_parent_dir(old_inode,
985 if (!old_dir_entry) {
986 if (IS_ERR(old_dir_page))
987 err = PTR_ERR(old_dir_page);
992 if (S_ISDIR(new_inode->i_mode)) {
993 new_dir_entry = f2fs_parent_dir(new_inode,
995 if (!new_dir_entry) {
996 if (IS_ERR(new_dir_page))
997 err = PTR_ERR(new_dir_page);
1004 * If cross rename between file and directory those are not
1005 * in the same directory, we will inc nlink of file's parent
1006 * later, so we should check upper boundary of its nlink.
1008 if ((!old_dir_entry || !new_dir_entry) &&
1009 old_dir_entry != new_dir_entry) {
1010 old_nlink = old_dir_entry ? -1 : 1;
1011 new_nlink = -old_nlink;
1013 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1014 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1018 f2fs_balance_fs(sbi, true);
1022 /* update ".." directory entry info of old dentry */
1024 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1026 /* update ".." directory entry info of new dentry */
1028 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1030 /* update directory entry info of old dir inode */
1031 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1033 down_write(&F2FS_I(old_inode)->i_sem);
1034 file_lost_pino(old_inode);
1035 up_write(&F2FS_I(old_inode)->i_sem);
1037 old_dir->i_ctime = current_time(old_dir);
1039 down_write(&F2FS_I(old_dir)->i_sem);
1040 f2fs_i_links_write(old_dir, old_nlink > 0);
1041 up_write(&F2FS_I(old_dir)->i_sem);
1043 f2fs_mark_inode_dirty_sync(old_dir, false);
1045 /* update directory entry info of new dir inode */
1046 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1048 down_write(&F2FS_I(new_inode)->i_sem);
1049 file_lost_pino(new_inode);
1050 up_write(&F2FS_I(new_inode)->i_sem);
1052 new_dir->i_ctime = current_time(new_dir);
1054 down_write(&F2FS_I(new_dir)->i_sem);
1055 f2fs_i_links_write(new_dir, new_nlink > 0);
1056 up_write(&F2FS_I(new_dir)->i_sem);
1058 f2fs_mark_inode_dirty_sync(new_dir, false);
1060 add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1061 add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1063 f2fs_unlock_op(sbi);
1065 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1066 f2fs_sync_fs(sbi->sb, 1);
1069 if (new_dir_entry) {
1070 f2fs_dentry_kunmap(new_inode, new_dir_page);
1071 f2fs_put_page(new_dir_page, 0);
1074 if (old_dir_entry) {
1075 f2fs_dentry_kunmap(old_inode, old_dir_page);
1076 f2fs_put_page(old_dir_page, 0);
1079 f2fs_dentry_kunmap(new_dir, new_page);
1080 f2fs_put_page(new_page, 0);
1082 f2fs_dentry_kunmap(old_dir, old_page);
1083 f2fs_put_page(old_page, 0);
1088 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1089 struct inode *new_dir, struct dentry *new_dentry,
1094 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1097 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1102 if (flags & RENAME_EXCHANGE) {
1103 return f2fs_cross_rename(old_dir, old_dentry,
1104 new_dir, new_dentry);
1107 * VFS has already handled the new dentry existence case,
1108 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1110 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1113 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1114 struct inode *inode,
1115 struct delayed_call *done)
1121 return ERR_PTR(-ECHILD);
1123 page = read_mapping_page(inode->i_mapping, 0, NULL);
1125 return ERR_CAST(page);
1127 target = fscrypt_get_symlink(inode, page_address(page),
1128 inode->i_sb->s_blocksize, done);
1133 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1134 .get_link = f2fs_encrypted_get_link,
1135 .getattr = f2fs_getattr,
1136 .setattr = f2fs_setattr,
1137 #ifdef CONFIG_F2FS_FS_XATTR
1138 .listxattr = f2fs_listxattr,
1142 const struct inode_operations f2fs_dir_inode_operations = {
1143 .create = f2fs_create,
1144 .lookup = f2fs_lookup,
1146 .unlink = f2fs_unlink,
1147 .symlink = f2fs_symlink,
1148 .mkdir = f2fs_mkdir,
1149 .rmdir = f2fs_rmdir,
1150 .mknod = f2fs_mknod,
1151 .rename = f2fs_rename2,
1152 .tmpfile = f2fs_tmpfile,
1153 .getattr = f2fs_getattr,
1154 .setattr = f2fs_setattr,
1155 .get_acl = f2fs_get_acl,
1156 .set_acl = f2fs_set_acl,
1157 #ifdef CONFIG_F2FS_FS_XATTR
1158 .listxattr = f2fs_listxattr,
1162 const struct inode_operations f2fs_symlink_inode_operations = {
1163 .get_link = f2fs_get_link,
1164 .getattr = f2fs_getattr,
1165 .setattr = f2fs_setattr,
1166 #ifdef CONFIG_F2FS_FS_XATTR
1167 .listxattr = f2fs_listxattr,
1171 const struct inode_operations f2fs_special_inode_operations = {
1172 .getattr = f2fs_getattr,
1173 .setattr = f2fs_setattr,
1174 .get_acl = f2fs_get_acl,
1175 .set_acl = f2fs_set_acl,
1176 #ifdef CONFIG_F2FS_FS_XATTR
1177 .listxattr = f2fs_listxattr,